PATENT DOCUMENT

Publication Number: US-10446876-B2
Application Number: US-201816037468-A
Country: US
Kind Code: B2

Title: Rechargeable battery features and components

Abstract:
Energy storage devices, battery cells, and batteries of the present technology may include a housing characterized by a first end and a second end opposite the first end. The housing may include a circumferential indentation proximate the first end. The housing may define a first interior region between the first end and the circumferential indentation, and the housing may define a second interior region between the circumferential indentation and the second end. The batteries may include a set of electrodes located within the housing. The set of electrodes may be positioned within the second interior region of the housing. The batteries may include a cap at least partially contained within the first interior region of the housing. The batteries may also include a first insulator positioned within the housing. The first insulator may extend across the circumferential indentation from the cap to the set of electrodes.

Claims:
What is claimed is: 
     
       1. A battery comprising:
 a housing characterized by a first end and a second end opposite the first end, wherein the housing comprises a circumferential indentation proximate the first end, wherein the housing defines a first interior region between the first end and the circumferential indentation, and wherein the housing defines a second interior region between the circumferential indentation and the second end; 
 a set of electrodes located within the housing, wherein the set of electrodes is positioned within the second interior region of the housing; 
 a cap at least partially contained within the first interior region of the housing, wherein the cap is characterized by a first surface facing the set of electrodes; and 
 a first insulator positioned within the housing, wherein the first insulator extends across the circumferential indentation from the cap to the set of electrodes, wherein the first insulator is characterized by a first outer radius at a first end proximate the cap, wherein the first insulator is characterized by a second outer radius greater than the first outer radius at a second end proximate the set of electrodes, and wherein the first insulator is characterized by a chamfered edge on a radially outermost surface of the first insulator extending to the first end of the first insulator. 
 
     
     
       2. The battery of  claim 1 , wherein the set of electrodes includes a separator defining a height of the set of electrodes, and wherein the first insulator is positioned within the housing in contact with the separator. 
     
     
       3. The battery of  claim 2 , wherein the first insulator compresses the separator within the housing. 
     
     
       4. The battery of  claim 1 , wherein the first insulator is sized to maintain a portion of the first insulator characterized by the chamfered edge between the circumferential indentation of the housing and an exterior component of the set of electrodes at all times. 
     
     
       5. The battery of  claim 1 , further comprising an electrode tab extending from the set of electrodes to the cap, wherein the electrode tab is coupled with the cap along the first surface of the cap at a first end of the electrode tab, and wherein the first end of the electrode tab is characterized by chamfered edges. 
     
     
       6. The battery of  claim 5 , wherein the electrode tab is fixedly coupled with the cap at a position on the electrode tab centrally located between the chamfered edges. 
     
     
       7. The battery of  claim 1 , further comprising an electrode tab coupled between the set of electrodes and an interior surface of the housing, wherein the electrode tab is coupled with the housing in the second interior region proximate the circumferential indentation. 
     
     
       8. The battery of  claim 7 , wherein the coupling of the electrode tab comprises a three-point weld. 
     
     
       9. A battery comprising:
 a housing characterized by a first end and a second end opposite the first end, wherein the housing comprises a circumferential indentation proximate the first end, wherein the housing defines a first interior region between the first end and the circumferential indentation, and wherein the housing defines a second interior region between the circumferential indentation and the second end; 
 a set of electrodes located within the housing, wherein the set of electrodes is positioned within the second interior region of the housing; 
 a cap at least partially contained within the first interior region of the housing, wherein the cap is characterized by a first surface facing the set of electrodes; 
 an electrode tab coupled between the set of electrodes and an interior surface of the housing, wherein the electrode tab is coupled with the housing in the second interior region proximate the circumferential indentation; and 
 a first insulator positioned within the housing, wherein the first insulator extends across the circumferential indentation from the cap to the set of electrodes, wherein the first insulator is characterized by a first outer radius at a first end proximate the cap, wherein the first insulator is characterized by a second outer radius greater than the first outer radius at a second end proximate the set of electrodes, and wherein the first insulator is characterized by a chamfered edge on a radially outermost surface of the first insulator extending to the first end of the first insulator. 
 
     
     
       10. The battery of  claim 9 , wherein the electrode tab is a first electrode tab, the battery further comprising a second electrode tab extending from the set of electrodes to the cap, wherein the electrode tab is coupled with the cap along the first surface of the cap at a first end of the electrode tab, and wherein the first end of the electrode tab is characterized by chamfered edges. 
     
     
       11. The battery of  claim 10 , wherein the second electrode tab is fixedly coupled with the cap at a position on the electrode tab centrally located between the chamfered edges. 
     
     
       12. The battery of  claim 9 , wherein the coupling of the electrode tab comprises a three-point weld. 
     
     
       13. The battery of  claim 12 , wherein the three-point weld is in a triangular pattern. 
     
     
       14. The battery of  claim 9 , wherein the set of electrodes includes a separator defining a height of the set of electrodes, and wherein the first insulator is positioned within the housing in contact with the separator. 
     
     
       15. The battery of  claim 14 , wherein the first insulator compresses the separator within the housing. 
     
     
       16. A battery comprising:
 a housing characterized by a first end and a second end opposite the first end, wherein the housing comprises a circumferential indentation proximate the first end, wherein the housing defines a first interior region between the first end and the circumferential indentation, and wherein the housing defines a second interior region between the circumferential indentation and the second end; 
 a set of electrodes located within the housing, wherein the set of electrodes is positioned within the second interior region of the housing; 
 a cap at least partially contained within the first interior region of the housing, wherein the cap is characterized by a first surface facing the set of electrodes; 
 an electrode tab extending from the set of electrodes to the cap, wherein the electrode tab is coupled with the cap along the first surface of the cap at a first end of the electrode tab, and wherein the first end of the electrode tab is characterized by chamfered edges; and 
 a first insulator positioned within the housing, wherein the first insulator extends across the circumferential indentation from the cap to the set of electrodes, wherein the first insulator is characterized by a first outer radius at a first end proximate the cap, wherein the first insulator is characterized by a second outer radius greater than the first outer radius at a second end proximate the set of electrodes, and wherein the first insulator is characterized by a chamfered edge on a radially outermost surface of the first insulator extending to the first end of the first insulator. 
 
     
     
       17. The battery of  claim 16 , wherein the electrode tab is a first electrode tab, the battery further comprising a second electrode tab coupled between the set of electrodes and an interior surface of the housing, wherein the electrode tab is coupled with the housing in the second interior region proximate the circumferential indentation. 
     
     
       18. The battery of  claim 16 , wherein the electrode tab is fixedly coupled with the cap at a position on the electrode tab centrally located between the chamfered edges.

Description:
RELATED APPLICATIONS 
     This application is a continuation of U.S. Nonprovisional application Ser. No. 15/795,913, filed Oct. 27, 2017, which claims the benefit of U.S. Provisional Application No. 62/500,271, filed May 2, 2017, which are hereby incorporated by reference in their entireties for all purposes. 
    
    
     TECHNICAL FIELD 
     The present technology relates to batteries and battery components. More specifically, the present technology relates to features and components of a rechargeable battery. 
     BACKGROUND 
     In battery-powered devices, active device use can produce scenarios enhancing wear on the device. Batteries within the device may be exposed to more intense circumstances and environments than predecessor designs. Improved designs are needed. 
     SUMMARY 
     The present technology relates to energy storage devices, including battery cells and batteries, which may include a housing characterized by a first end and a second end opposite the first end. The housing may include a circumferential indentation proximate the first end. The housing may define a first interior region between the first end and the circumferential indentation, and the housing may define a second interior region between the circumferential indentation and the second end. The batteries may include a set of electrodes located within the housing. The set of electrodes may be positioned within the second interior region of the housing. The batteries may include a cap at least partially contained within the first interior region of the housing. The cap may be characterized by a first surface facing the set of electrodes. The batteries may also include a first insulator positioned within the housing. The first insulator may extend across the circumferential indentation from the cap to the set of electrodes. The first insulator may be characterized by a first outer radius at a first end proximate the cap, and the first insulator may be characterized by a second outer radius greater than the first outer radius at a second end proximate the set of electrodes. 
     In some embodiments, the set of electrodes may include a separator defining a height of the set of electrodes. The first insulator may be positioned within the housing in contact with the separator. The first insulator may compress the separator within the housing. The first insulator may be characterized by a chamfered edge extending to the first end of the first insulator. The first insulator may be of a size configured to maintain a portion of the first insulator characterized by the chamfered edge between the circumferential indentation of the housing and an exterior component of the set of electrodes at all times. The batteries may further include an electrode tab extending between and contacting both the set of electrodes and the cap. The electrode tab may be coupled with the cap along the first surface of the cap at a first end of the electrode tab, and the first end of the electrode tab may be characterized by chamfered edges. The electrode tab may be fixedly coupled with the cap at a position on the electrode tab centrally located between the chamfered edges. 
     Exemplary batteries may further include an electrode tab coupled between the set of electrodes and an interior surface of the housing. The electrode tab may be coupled with the housing in the second interior region proximate the circumferential indentation. The coupling of the electrode tab may include a three-point weld. The electrode tab may be fixedly coupled with an anode current collector of the set of electrodes along a first surface of the anode current collector. An insulating tape may be positioned on a second surface of the anode current collector opposite the first surface over a portion of the anode current collector to which the electrode tab is coupled. The insulating tape may extend along the second surface of the anode current collector towards an anode active material located on the second surface of the anode current collector. The batteries may also include a second insulator positioned along a base of the housing between the set of electrodes and the housing. The second insulator may be characterized by an outer diameter less than an outer diameter of the set of electrodes. The set of electrodes may include a rolled configuration including coupling material extending about an exterior surface of the set of electrodes and characterized by a first end of the coupling material overlapping a second end of the coupling material. In embodiments, the battery may include a rolled configuration, and may include a cathode current collector. The battery may also include a cathode active material positioned on a portion of the cathode current collector. The battery may further include an insulating tape covering an end of the cathode active material and extending to an exterior edge along a length of the cathode current collector. 
     The present technology may also encompass batteries including a set of electrodes. The batteries may include a cap. The batteries may further include an electrode tab coupled with the set of electrodes at a first end of the electrode tab. A first surface of the electrode tab may be coupled with a surface of the cap at a second end of the electrode tab. The second end of the electrode tab may be contained within an insulative material. 
     In some embodiments, a first window may be defined within the insulative material along the first surface of the electrode tab. The first window may expose a portion of the electrode tab. The electrode tab may be coupled with the cap at the portion of the electrode tab exposed by the window defined within the insulative material. The insulative material may extend along the first surface of the electrode tab entirely about an exterior of the window. The electrode tab may be further characterized by a second surface opposite the first surface of the electrode tab. The electrode tab may be characterized by at least one sidewall extending between the first surface and the second surface. The insulative material may extend along the at least one sidewall. The insulative material may extend about the second surface of the electrode tab. A second window may be defined in the insulative material along the second surface. The second window may be located along the second surface opposite a position of the first surface where the first window is defined in the insulative material. 
     The present technology may also encompass batteries including a housing characterized by a first end and a second end opposite the first end. The housing may include a circumferential indentation proximate the first end. The housing may define a first interior region between the first end and the circumferential indentation. The housing may also define a second interior region between the circumferential indentation and the second end. The batteries may include a set of electrodes located within the housing, and the set of electrodes may be positioned within the second interior region of the housing. The batteries may include a cap at least partially contained within the first interior region of the housing. The cap may be characterized by a first surface facing the set of electrodes. The batteries may include a first electrode tab coupled with the set of electrodes at a first end of the electrode tab. A first surface of the electrode tab may be coupled with a surface of the cap at a second end of the electrode tab. The second end of the electrode tab may be contained within an insulative material. A first window may be defined within the insulative material along the first surface of the electrode tab. The first end of the electrode tab may be characterized by chamfered edges. 
     The batteries may include a second electrode tab coupled between the set of electrodes and an interior surface of the housing. The electrode tab may be coupled with the housing in the second interior region proximate the circumferential indentation. The batteries may also include a first insulator positioned within the housing. The first insulator may extend across the circumferential indentation from the cap to the set of electrodes. The first insulator may be characterized by a first outer radius at a first end proximate the cap. The first insulator may be characterized by a second outer radius greater than the first outer radius at a second end proximate the set of electrodes. 
     Such technology may provide numerous benefits over conventional technology. For example, the present devices may expand and enhance insulation between components operating at different potential. Additionally, the designs may improve hardware configurations for smaller batteries. These and other embodiments, along with many of their advantages and features, are described in more detail in conjunction with the below description and attached figures. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       A further understanding of the nature and advantages of the disclosed embodiments may be realized by reference to the remaining portions of the specification and the drawings. 
         FIG. 1  shows a schematic cross-sectional view of an energy storage device according to embodiments of the present technology. 
         FIG. 2  shows a schematic partial cross-sectional view of an energy storage device according to embodiments of the present technology. 
         FIG. 3  shows a schematic partial view of components of an energy storage device according to embodiments of the present technology. 
         FIG. 4  shows a schematic partial view of an electrode tab of an energy storage device according to embodiments of the present technology. 
         FIG. 5  shows a schematic partial cross-sectional view of an energy storage device according to embodiments of the present technology. 
         FIG. 6  shows a schematic partial view of a battery cell according to embodiments of the present technology. 
         FIG. 7  shows a schematic cross-sectional view of a portion of an electrode according to embodiments of the present technology. 
         FIG. 8  shows a schematic cross-sectional view of a portion of an electrode according to embodiments of the present technology. 
         FIGS. 9A-9C  show schematic plan views of electrode tabs of an energy storage device according to embodiments of the present technology. 
     
    
    
     Several of the figures are included as schematics. It is to be understood that the figures are for illustrative purposes, and are not to be considered of scale unless specifically stated to be of scale. Additionally, as schematics, the figures are provided to aid comprehension and may not include all aspects or information compared to realistic representations, and may include exaggerated material for illustrative purposes. 
     In the figures, similar components and/or features may have the same numerical reference label. Further, various components of the same type may be distinguished by following the reference label by a letter that distinguishes among the similar components and/or features. If only the first numerical reference label is used in the specification, the description is applicable to any one of the similar components and/or features having the same first numerical reference label irrespective of the letter suffix. 
     DETAILED DESCRIPTION 
     Batteries, battery cells, and more generally energy storage devices, may be made from a host of materials. As battery-powered devices continue to shrink, internal batteries that power them are forced into ever smaller form factors as well. In one sense, a battery may be reduced in size by reducing capacity, or more specifically reducing the amount of active material contained within the battery. However, as consumers continue to expect longer time of use in smaller designs, the amount of active material within a battery not only may be maintained, but designs may seek to increase both the volume occupied by active material and the amount of power produced by the active material. Because of the tension between volume within a battery and amount of space that may be used for active material, space within the battery for other components may be constrained even more. 
     In tandem with the physical reduction in device size is the more robust use of devices. From phones, media players, and fitness devices, to wireless components that may be used in conjunction with the devices, consumers are utilizing devices in daily activities that can expose the devices to more intense conditions, including more routine bumping, dropping, weather exposure, as well as almost constant use. This may require more robust designs and components for both the general device and the battery contained within the device. When the devices being powered are small, such as watches and fitness devices, or wireless devices requiring dedicated batteries such as earphones and health monitors, more robust designs can be difficult to produce when the scale of the battery may be a few millimeters or less. 
     The present technology addresses many of these issues by incorporating features and components that may produce more robust battery designs, while limiting volume occupied by components aside from the cell material. Many of the batteries described may be on a scale of a few millimeters or less, and internal components may be even smaller. By utilizing particular components and configurations as described throughout the application, the present technology may provide more robust designs that maintain high capacity for long periods of use. 
     Although the remaining portions of the description will routinely reference batteries that may be on a relatively small scale, it will be readily understood by the skilled artisan that the technology is not so limited. The present designs may be employed with any number of battery or energy storage devices, including other rechargeable and primary, or non-rechargeable, battery types, as well as electrochemical capacitors also known as supercapacitors or ultracapacitors. Moreover, the present technology may be applicable to batteries and energy storage devices used in any number of technologies that may include, without limitation, phones and mobile devices, wireless accessories including monitors, earphones, and speakers, handheld electronic devices, laptops and other computers, appliances, heavy machinery, transportation equipment including automobiles, water-faring vessels, air travel equipment, and space travel equipment, as well as any other device that may use batteries or benefit from the discussed designs. Accordingly, the disclosure and claims are not to be considered limited to any particular example discussed, but can be utilized broadly with any number of devices that may exhibit some or all of the electrical or chemical characteristics of the discussed examples. 
       FIG. 1  shows a schematic cross-sectional view of an energy storage device  100  according to embodiments of the present technology.  FIG. 1  illustrates a cylindrical battery, which may be a rechargeable battery in embodiments, although energy storage device  100  may also be a primary battery, such as an alkaline battery. Energy storage device  100  may be partially or substantially cylindrical, although in embodiments energy storage device  100  may be rectilinear. In embodiments in which energy storage device  100  is rechargeable, the device may include a number of battery cell designs including a rolled configuration, such as a jelly roll as illustrated, although the battery cell may also be a stacked, prismatic, or pouch-style cell in other embodiments. Energy storage device  100  may include a housing  105 . Housing  105  may include a first end  107  and a second end  109  in embodiments. 
     Housing  105  may also define a circumferential indentation  108 . Indentation  108  may extend entirely about housing  105 , and may be an annular indentation, although in other geometries the indentation may include corners, such that the indentation extends about a perimeter of the housing. The indentation  108  may be beading, necking, or some other restriction formed about the housing  105 . Housing  105  may define one or more interior regions within the housing. For example, housing  105  may define a first interior region  110  that may be located between the first end  107  and the circumferential indentation  108 . Housing  105  may also define a second interior region  112  between the circumferential indentation  108  and the second end  109 . Housing  105  may be or include a pouch, a shell, an enclosure, or a hard-casing in embodiments. Housing  105  may be made of insulative materials, conductive materials, or conductive materials with an outer casing, for example. Exemplary conductive materials may be materials that are chemically stable at cathode and/or anode operating potentials, and may include aluminum, copper, stainless steel, or other metals that may operate at any particular cell potential. 
     A set of electrodes  115  may be located within housing  105 . The set of electrodes  115  may be positioned within the second interior region  112  of the housing  105 . The et of electrodes  115  may be a number of rechargeable or primary cell designs. For example, the set of electrodes  115  may be a rechargeable cell, and may be included in a rolled configuration, such as a jelly roll. The roll may include multiple layers that are then rolled, stacked, or alternated up to a particular thickness to be included within housing  105 . The configuration of the set of electrodes  115  may be a jelly roll in embodiments in which housing  105  is cylindrical through second interior region  112 . As illustrated, the set of electrodes  115  may include active material  116 , and separator material  118 . Separator material  118  may be an electrically non-conducting material that may be positioned between anode and cathode active materials, and be configured to allow ionic transport through the structure. For example, separator material  118  may be a polymer or a cellulosic material in embodiments. The active material may be disposed on current collectors described in later figures, and may include any number of materials. 
     The active materials may be or include any number of materials used in rechargeable batteries, and may include materials for a lithium-based system. For example, active material  116  may include an anode material and include a carbon-containing compound such as graphite or a lithium-containing compound such as lithium titanate. Any other anode materials may similarly be used with the present technology. Additionally, for example, active material  116  may include a cathode material including a lithium-containing material such as lithium cobalt oxide or lithium phosphate, among many other known lithium compounds used in such devices. The active material  116  may also include nickel, manganese, cobalt, aluminum, and a variety of other materials that would be understood to be encompassed by the present technology. Indeed, any possible anode and cathode materials that may be incorporated within a rechargeable cell as will be described below are suitable for the present designs, and will be understood to be encompassed by the present technology. 
     In embodiments the set of electrodes  115  may be coupled with contacts within the battery  100 . For example, a first electrode tab  120  may be an anode tab, and may be coupled with the housing  105  as will be described in more detail below. The battery  100  may also include a second electrode tab  125 , which may be a cathode tab in embodiments. It is to be understood that the electrode tabs may be reversed, or otherwise coupled within the battery  100  in order to provide a positive and negative terminal. Second electrode tab  125  will also be discussed in further detail below, and in embodiments may be coupled with a cap  130 . Cap  130  may be at least partially positioned within the housing  105 , and may be at least partially positioned within the first interior region  110  of housing  105 . Cap  130  may be characterized by a first surface  132 , which may face towards the interior of the housing, and may face towards the set of electrodes  115 . The cap  130  may also include a second surface  134 , which may be a surface opposite first surface  132 . Second surface  134  may face away from the set of electrodes, and may operate as a positive terminal, for example, during use of battery  100 . 
     Battery  100  may include a gasket  135 , which may extend about the cap  130 . Gasket  135  may be annular in shape, or may be characterized by any of a variety of other geometries. Gasket  135  may couple with cap  130  to limit or prevent contact between cap  130  and the housing  105 . As cap  130  may be coupled with one of the electrode tabs of the set of electrodes, and housing  105  may be coupled with another of the electrode tabs of the set of electrodes, the two components may be configured to operate at different potentials, and may operate as the two battery terminals. Gasket  135  may operate to limit contact between the two terminals in embodiments. Gasket  135  may be a polymer, rubber, or any number of insulative materials configured to maintain cap  130  electrically decoupled from housing  105 . 
     Battery  100  may also include insulators positioned within the device, and may include a first insulator  140 , and a second insulator  150 . First insulator  140  may be positioned within the housing  105 . First insulator  140  may extend within both first interior region  110  and second interior region  112 , and in embodiments, first insulator  140  may extend across circumferential indentation  108 . First insulator  140  may extend from cap  130  to the set of electrodes  115 , and may contact one or both components. In some embodiments, first insulator  140  may extend towards cap  130  without contacting the component, and may extend to at least a portion of the set of electrodes  115 . 
     First insulator  140  may be at least partially annular to allow passage of second electrode tab  125 , or first insulator  140  may define a channel through which second electrode tab  125  may pass. First insulator  140  may be characterized by an inner radius, which in embodiments may be constant through a length of the first insulator  140 . First insulator  140  may also be characterized by an outer profile, which may be configured based on an interior profile of the housing  105 , as well as other internal components. First insulator  140  may be characterized by a first outer radius at a first end  142  of first insulator  140 , where first end  142  may be proximate cap  130 . First insulator  140  may also be characterized by a second outer radius at a second end  144  of first insulator  140 , wherein second end  144  may be proximate the set of electrodes  115 . The second outer radius may be greater than the first outer radius in embodiments, although in other embodiments the first outer radius may be greater than or equal to the second outer radius. 
     As illustrated the first insulator  140  may intersect the set of electrodes  115 . For example, the set of electrodes  115  may include a separator  118  as previously noted. The separator may extend laterally, in a rolled configuration, beyond the active materials  116  and current collectors. When rolled and positioned within the housing  105 , the separator  118  may define a height of the set of electrodes within the housing  105 , and the separator  118  may extend above and below active materials  116  and the associated current collectors. The separator  118  may be relatively thin and lenient to deflection based on multiple factors including the material of the separator as well as the thickness of the separator. The first insulator may contact the separator during formation of the battery. The formation may include a compression operation in which the first insulator  140  may provide a force against the separator  118 , which may compress, deflect, or otherwise deform the separator  118  within the housing  105 . This operation may not affect the active material  116 , and the separator may be compressed at a height above the active materials of the set of electrodes. 
       FIG. 2  shows a schematic partial cross-sectional view of energy storage device  100  according to embodiments of the present technology, and may show a more detailed view of first insulator  140 . First insulator  140  may be characterized by a profile at an outer radius extending along the first insulator. The profile may be formed to account for characteristics of the housing and internal components of the battery. First insulator  140  may be characterized by a chamfered or sloping edge  143  extending to first end  142  of the first insulator  140 . The chamfered edge  143  may begin in line with the circumferential indentation  108 , and may begin below the circumferential indentation  108 , such as within the second interior region  112 . The chamfered edge  143  may taper towards cap  130  in embodiments. The chamfered edge  143  may allow the first insulator  140  to avoid gasket  135  in embodiments, such that the components may or may not contact one another within a sealed battery, although the components may be configured to contact each other with a minimal amount of force so as not to cause, or to cause within tolerance, an outward compression against the cap  130 , housing  105 , or any other component of the battery. 
     First insulator  140  may be further characterized by additional outer profile characteristics including a cylindrical section  145  extending from the chamfered edge  143  to an additional sloped section  147  extending radially outward of an inner surface of the circumferential indentation  108  in housing  105 . The first insulator  140  may further include an additional cylindrical section  149  extending to second end  144  of the first insulator  140 , which may be in contact with separator  118 . In some embodiments, second end  144  may be characterized by an outer diameter less than 5 mm. Additional profiles encompassed by the present technology may be characterized by additional exterior features and geometries configured to form about aspects of the housing  105 . 
     The first insulator  140  may be in contact with the cap  130  of the battery as well as the separator  118  of the set of electrodes. By having the components of the battery cell in contact, and possibly under compression, even a minor compression, components of the battery may be maintained in line during external events. Battery  100  may be characterized by reduced dimension in some embodiments, although battery  100  may be of almost any size. The specific configuration, however, may afford battery  100  to be on a scale of a few millimeters in diameter or smaller in some embodiments. For example, when a device containing battery  100  is dropped or bumped, the components within battery  100  may be maintained in line with each other, and may be stabilized by the contact with other components. Conventional batteries, however, may be characterized by looser tolerances, which may allow components within the battery to shift within the housing. This may include the set of electrodes  115 , which may tear, or break contact with the electrode tabs if the set of electrodes shifts or moves during a drop or other event. In the present technology, the set of electrodes  115  may be maintained between one or more insulators to reduce or prevent movement during an event such as when the device housing the battery  100  is dropped. 
     On batteries of reduced scale without the present technology, internal movement of components, or shifting of materials, may allow second electrode tab  125  to approach or even contact circumferential indentation  108 . As previously noted, these components may be operating at different potentials, and may be electrically coupled with the terminals of the battery  100 . If the materials were shifted sufficiently during a drop, for example, the battery may short between the two components, which in embodiments may be only 1 mm from each other or less. First insulator  140  may prevent such an occurrence, by ensuring that at least a portion of first insulator  140  characterized by the chamfered edge  143  is maintained between the circumferential indentation of the housing  105  and an exterior component of the set of electrodes  115 , such as second electrode tab  125 , at all times. This may be produced by ensuring that first end  142  of first insulator  140  extends to or beyond first surface  132  of cap  130 , such as is illustrated. Put another way, first surface  132  of cap  130  may extend within first insulator  140  in embodiments. 
     First insulator  140  may be or include a number of insulator materials, such as polymer, rubber, or some combination. For example, first insulator  140  may be a thermoplastic polymer, such as polypropylene, and may be a thermoplastic polyester elastomer. The elastomers may be any number of materials including thermoplastic copolyesters, copolymers, olefins, polyamides, or polyurethanes. By utilizing materials such as thermoplastic polyester elastomers, the first insulator  140  may be capable to flexing during battery operation, which may swell the set of electrodes, and then return to the original form. 
     The present technology may also adjust the electrode tabs to reduce the chance of shorting events. As previously mentioned, the second electrode tab  125  may be coupled with the cathode of the set of electrodes  115 . Second electrode tab  125  may extend between the set of electrodes  115  and cap  130 , and may be in contact with or coupled with each component. In some embodiments, second electrode tab  125  may be fixedly coupled with both the set of electrodes  115  at the cathode, and with cap  130 . A first end  127  of second electrode tab  125  may be coupled with first surface  132  of cap  130 , as illustrated in  FIG. 2 . Cap  130  may be characterized by a round or ovular shape in embodiments, while second electrode tab  125  may be rectilinear. For example, second electrode tab  125  may have a rectangular end, which may include corners extending beyond a radius of cap  130 . The present technology may adjust the geometry of second electrode tab  125  to increase the distance between corners of the second electrode tab  125  and aspects of housing  105 , including circumferential indentation  108 . 
     Turning to  FIG. 3  is shown a schematic partial plan view of components of energy storage device  100  according to embodiments of the present technology.  FIG. 3  illustrates a view from below cap  130 , illustrating first surface  132 . First portion  127  of second electrode tab  125  is also shown. The illustration includes coupling according to the present technology of an adjusted second electrode tab  125 . As illustrated, second electrode tab  125  may be characterized by chamfered edges  128  along first portion  127  of second electrode tab  125 . By forming chamfered edges  128 , corners of first portion  127  may be removed, which may otherwise extend beyond a radius of first surface  132  of cap  130 . The chamfered edges  128  may further be characterized by rounded corners to reduce sharp points. In other embodiments the tab may be characterized by an alternative geometry, such as a curved or rounded profile, which may produce the same effect. Additionally, in some embodiments, the first portion may be maintained within an outer radius of cap  130 , and may have no edges or corners extending beyond the outer radius of the cap  130 . 
       FIG. 3  also illustrates the coupling of second electrode tab  125  to cap  130 , which may be performed in a variety of ways. Although an adhesive may be used in embodiments, the components may be fused or welded in embodiments to maintain conductivity between the components, or reduce resistance between the components. The coupling may utilize solder or other metal to connect the two components, or welding techniques may be used to fixedly couple the second electrode tab  125  to cap  130 . An exemplary welding technique may include laser beam welding or electron beam welding, which may fuse the two components together. As illustrated, the welding may include spot welds  129  in a particular orientation. 
     Although any number of spot welds may be utilized, and any number of weld patterns may be formed, the coupling may include less than 5 spot welds, such as 4 welds, 3 welds, 2 welds, or 1 weld. For example, three welds may be formed in an exemplary coupling. The welding may be performed such that one weld may be centrally located between chamfered edges  128 , such as weld  129   a . Weld  129   a  relative to welds  129   b - c  may be positioned centrally to allow coupling closer to a top edge of second electrode tab  125 . For example, weld  129   a  may be positioned less than 1 mm or less than 0.5 mm from an exterior edge of second electrode tab  125  in embodiments. Such a weld distance from the exterior edge may not be possible if two welds are placed adjacent one another, such as in a four weld, square pattern. In such a scenario, the welds may be placed further down the tab to avoid proximity to the chamfer. Accordingly, the second electrode tab  125  would extend further past the welds, which may again extend the tab past an outer radius of first surface  132  of cap  130 . 
     First electrode tab  120  as illustrated in  FIGS. 1 and 2  may also be manufactured for use in batteries according to the present technology. First electrode tab  120 , as shown schematically in  FIG. 1 , may be coupled with the set of electrodes  115  and may also be coupled with housing  105 . In embodiments, first electrode tab  120  may be coupled with an interior surface of battery  100 . For example, first electrode tab  120  may be coupled along a sidewall of housing  105  in second interior region  112 , proximate circumferential indentation  108 . For example, first electrode tab  120  may be coupled adjacent circumferential indentation  108 , or may be coupled along a portion of housing  105  at which circumferential indentation  108  is formed. In other embodiments first electrode tab  120  may be coupled at other locations, such as with a bottom portion of housing  105 . First electrode tab  120  may be similarly shaped as second electrode tab  125 , and may be characterized by a rectilinear design. Additionally, first electrode tab  120  may be planar, while in embodiments housing  105  may be characterized by a curved surface, such as with a cylindrical design. 
     Coupling of first electrode tab  120  with housing  105  may occur prior to or subsequent formation of the circumferential indentation, or beading, along the housing. Depending on the placement and coupling of the first electrode tab  120 , the beading may cause further curvature of the housing  105  against the first electrode tab  120 , which may provide additional stress to the manner of coupling. In embodiments, first electrode tab  120  may be welded to housing  105 , or may be coupled with adhesive, fusing, or by other techniques that may produce a coupling of the two components and allow electrical conduction between them. Turning to  FIG. 4  is shown a schematic partial cross-sectional view of energy storage device according to embodiments of the present technology. The figure illustrates a portion of housing  105  and first electrode tab  120 . In one embodiment, projections  122  may be formed on first electrode tab  120  to provide contact points for welding or fusing. The projections  122  may facilitate contact across a more planar first electrode tab  120  with a curved housing  105 . 
     The number of projections  122  may vary in different embodiments. In some embodiments, a number of projections  122  such as 1, 2, 3, 4, 5, 6 or more projections may be formed in any pattern across first electrode tab  120 . The number of projections may affect the coupling in embodiments, based on the different surface features. For example, four projections in a square pattern may not all contact housing  105  in some embodiments, or may provide a less flush contact. When welded, such as if an electrical current is applied to the components to form a weld, the amount of contact may affect the quality or extent of the weld. When a projection  122  is not flush with the housing  105 , the weld may be more superficial, or may not form at all, which may weaken the coupling of the components. The weld, which may also be formed by laser welding or any other form of welding, may be a point of resistance during a drop event, and may be a stress point. When a device is dropped, movement of the internal components may produce stress at fixed coupling positions, such as the welded projections  122 . The stress produced at the weld locations may overcome the strength of the coupling, which may cause the electrode tab to buckle, break, or separate from the housing  105 . 
     As illustrated in  FIG. 4 , three projections  122  may be formed instead, and nested with one another in a closer configuration than four projections in a square pattern may be. The projections in a triangular pattern may allow all three projections  122  to contact housing  105  during welding, which may ensure all three points may fully weld with housing  105  across each projection  122  at weld points  124 . Accordingly, utilizing three weld points  124  may appear to reduce the weld strength compared to four, for example, but by utilizing a pattern more likely to provide flush contact on a curved surface, the three projections  122  may enable a larger area of fusion on each projection that produces a three-point weld, which may provide an improved coupling over the coupling that four projections may afford. 
       FIG. 5  shows a schematic partial cross-sectional view of energy storage device  100  according to embodiments of the present technology. The illustration includes a view of a lower portion of battery  100  including housing  105 , the set of electrodes  115 , and second insulator  150 . Second insulator  150  may be any geometry corresponding to the geometry of a base of housing  105 . For example, the base of housing  105  may be round or ovular, and second insulator  150  may be characterized by a similar shape, although in other embodiments rectangular or other polygonal geometries may be used. Second insulator  150  may be characterized by equivalent dimensions to the base of housing  105 , or may be characterized by a radius less than a radius of the base of housing  105 . 
     The second insulator may perform multiple functions including providing support for the set of electrodes  115 , as well as maintaining an insulative surface between housing  105  and the set of electrodes  115 . An outer wind of the set of electrodes  115  may include anode material, which may be at a similar potential as housing  105 . However, at the exposed ends, may be access to the cathode material at different potential. Without second insulator  150 , or some other insulative device, a short may occur during operation or during an event such as a drop, which may deform the separator  118  and allow contact between cathode active material and housing  105 . 
     Based on the possible shorting path, second insulator  150  may be formed to an equivalent radius as the base of housing  105 . However, such dimensions may produce a trap for air within the housing  105 , or a restricted space along a curved base, which may cause the second insulator  150  to bow upward within the housing, or force the set of electrodes  115  further up within the housing. This may cause issues with closing the battery components, may deform one or more components, or may waste space within the battery, which could otherwise be used for additional capacity. Accordingly, in some embodiments, second insulator  150  may be characterized by a radius less than a radius of the base of housing  105 , and may be characterized by a radius less than an outer radius of the set of electrodes  115 . In some embodiments, an outer radius of the second insulator  150  may be less than or about 5 mm. 
       FIG. 6  shows a schematic plan view of a portion of a set of electrodes  600  according to embodiments of the present technology. The set of electrodes  600  may include any of the characteristics of the set of electrodes  115  previously described. The set of electrodes  600  may include an anode active material  610 , a cathode active material  615 , and a separator  620 . The active materials may also include the associated current collector foils. The set of electrodes  600  also illustrates a coupling material  625  that may be included about the set of electrodes  600 . The coupling material may be included over a portion of the set of electrodes  600  to protect the set of electrodes and assist in maintaining the structure, such as a rolled or wound structure. The coupling material  625  may extend about a portion of the set of electrodes  600 , or may extend along the entire height of the set of electrodes  600 , including along a height associated with a height of the active materials across the set of electrodes. In some embodiments the coupling material, which may be any of a variety of tapes, adhesives, or sleeves, may only partially extend about a circumference of the set of electrodes  600 . However, in devices for which dropping and other contact events may occur, the coupling material may extend fully about a circumference of the set of electrodes  600 . In some embodiments, a first end  627  of coupling material  625  may overlap a second end  629  of coupling material  625 . 
     During a drop or other contact event, the ability of components to shift within the battery may cause the set of electrodes to tear along one or more surfaces. When a current collector, which may be a metal foil, tears or separates, the edges or corners may be sharp enough to penetrate or cut the separator, which may allow an electrical short to occur. By extending coupling material  625  to overlap itself about the set of electrodes, the set of electrodes structure may be reinforced, which may resist tearing during events such as drops. It is to be understood that  FIG. 6  is a schematic only, and is shown for exemplary use of an insulative material, and may not show an actual form of the material. For example, first end  627  may not extend as far over second end  629 , and may be coupled directly after passing an outer wind of the electrode materials. 
       FIG. 7  shows a schematic cross-sectional view of a portion of an electrode  700  according to embodiments of the present technology. Electrode  700  may be part of an anode electrode structure, and may illustrate an outer portion of the anode electrode, which may be an outer wind of a jelly roll structure, for example. As illustrated in previous figures, a first electrode tab  120  may be coupled with a current collector  705 , which may be the anode current collector of the set of electrodes. The electrode tab  120  may be welded, bonded, or otherwise coupled, such as fixedly coupled with the current collector  705 . As illustrated, first electrode tab  120  may be coupled with a first surface  706  of current collector  705 . First electrode tab  120  may be a similar or different material as current collector  705 . For example, both materials may be copper, nickel, stainless steel, or some other conductive material operable at anode potential, or the components may each be one of these materials and be different from one another. 
     Current collector  705  may also be characterized by a second surface  708  opposite the first surface  706 . An insulating material  715 , such as a tape, may be applied along second surface  708 , and may be positioned on the second surface  708  over a portion of the current collector  705  to which first electrode tab  120  is coupled. First electrode tab  120  may be coupled with current collector  705  in many ways, such as welding, bonding, fusing, or by some other coupling. For example, first electrode tab  120  and current collector  705  may be welded together with an ultrasonic weld to attach the first electrode tab  120  to the current collector  705 . Ultrasonic welding may create surface roughness or burs along current collector  705  where the welding occurs, and may also produce burs or roughness on the second surface  708  opposite the location of the weld. Insulating material  715  may be applied across the second surface  708  subsequent the welding to cover any burs. This insulating material may also be applied to protect components, such as a separator, from contacting any formed burs, which may cut or tear the set of electrodes materials. 
     Additionally along second surface  708  may be included an active material  710 , such as an anode active material. The active material  710  may be located adjacent a portion of current collector  705  to which first electrode tab  120  is coupled, and may be distributed a distance from first electrode tab  120  to be at least partially separated. The separation may be associated with the insulating material  715 , which may be positioned proximate the active material  710 , and may contact or overlap active material  710 . In some embodiments, insulating material  715  may be extended in both lateral directions along second surface  708  beyond a portion of current collector  705  to which first electrode tab  120  is coupled, and may be extended further in a direction towards active material  710 . For example, as illustrated, insulating material  715  may extend a first distance along current collector  705  in a first direction along second surface  708  to a first end  716  of insulating material  715 . 
     Insulating material  715  may also extend a second distance along current collector  705  in a second direction along second surface  708  to a second end  718  of insulting material  715 . The second direction may be opposite the first in embodiments, and the second direction may be towards active material  710 , which may be distributed on current collector  705 . The second distance may be greater than the first distance as illustrated, and the second distance may extend towards active material  710 . The second distance may extend within about 5 mm of active material  710 , and may extend up to about 4 mm of active material  710 , up to or about 3 mm, up to or about 2 mm, up to or about 1 mm, up to or about 0.5 mm, or less in embodiments. In some embodiments insulating material  715  may extend in the second direction to contact or overlap a portion of active material  710 . By extending in the second direction further towards active material  710 , current collector  705  may be reinforced by the insulating material  715 , and may be less prone to tearing during events such as a drop. 
       FIG. 8  shows a schematic cross-sectional view of a portion of an electrode  800  according to embodiments of the present technology. Electrode  800  may be or include a cathode current collector  805 , which may include a cathode active material  810  positioned or disposed on a portion of the cathode current collector  805 . In embodiments, electrode  800  may illustrate an end portion of a cathode current collector that may be included in a rolled configuration such as previously described. 
     During a drop or other event, an outer portion of the set of electrodes, which may be a portion of the outer winding, may tear. In embodiments in which the outer winding is a portion of the anode foil, the anode foil may tear producing a relatively sharp edge, which may cut or otherwise perforate the separator allowing contact with the cathode current collector. Cathode current collector  805  may include an insulating tape  825  that may be used to cover any streaking of cathode active material  810 , and insulating tape  825  may extend over or overlap a portion of cathode active material  810  along cathode current collector  805 . In some embodiments, insulating tape  825  may be extended in a direction opposite cathode active material  810  to or towards an exterior edge  807  along a length of cathode current collector  805 . The battery may be rolled in a direction along a length of the current collectors, and thus insulating tape  825  may extend to an outer edge of the cathode current collector  805 , which may be at the outermost winding of the cathode current collector  805 . By extending insulating tape  825  to an outermost edge, or exterior edge, along a length of the cathode current collector  805 , the current collector may be better protected against contact with an anode current collector that may have punctured the separator along an outer wind of the set of electrodes. 
       FIGS. 9A-9C  show schematic views of electrode tabs of an energy storage device according to embodiments of the present technology. The electrode tabs may be associated with any of the previous batteries or battery cells as previously described, and may include any of the components of the cells. For example, the electrode tabs may be an anode tab or a cathode tab, and may be coupled with a portion of the battery housing, or a particular component of the battery, such as the cap. The electrode tabs may include any of the features or characteristics previously described above with respect to the electrode tabs. In some embodiments, electrode tab  900  may be a portion of an electrode tab coupled with a cap as previously described, although the electrode tab may be either a cathode associated tab or an anode associated tab, for example. Electrode tab  900  may be coupled with a first surface of the cap, such as previously described, and may be welded, bonded, fused, adhered, or otherwise coupled with the cap. 
     Similar to embodiments previously described, the electrode tab  900  may be characterized by a planar surface structure, and may be rectilinear in shape or geometry. In other embodiments, different shapes may be used, such as rounded, curved, or otherwise modified to couple with a surface of a cap or component of the battery, which may operate as a terminal. Electrode tab  900  may be coupled with a set of electrodes at a first end of the tab, as previously illustrated, and may be coupled with a surface of the cap or other component at a second end of the electrode tab.  FIG. 9A  may show second end  902  of electrode tab  900 . The second end  902  of electrode tab  900  may extend to an exterior edge  904  of the electrode tab, which may be proximate the coupling with the cap. As illustrated, a portion of second end  902  of electrode tab  900  may be contained within an insulative material  905 . Unlike conventional technologies which may partially cover or sheath an electrode tab extending up from the set of electrodes towards a coupling position, the present technology may extend coverage past the coupling position to an exterior end of the electrode tab. 
     As previously discussed, the corners or edges of electrode tab  900  may extend from the cap to which it is connected, and may extend towards a housing of the battery, which may be at a different potential. If the electrode tab  900  contacts the housing in such a scenario, an electrical short may occur. Where the housing may be characterized by a cylindrical shape and may have rounded sidewalls, corners of the electrode tab may be nearer the housing than other surfaces of the electrode tab. By insulating an end region of the electrode tab, an electrical barrier may be established between the components, which may protect the electrical integrity of the components from shorting if the battery or a device containing the battery is dropped, for example. Electrode tab  900  may also be characterized by chamfered edges as previously described with regard to electrode tab  125 . 
     The electrode tab  900  may be coupled with the cap by welding, fusing, or otherwise bonding the components. Additionally, the electrode tab and cap may be in electrical communication so as to operate as a terminal of the battery. Insulative material  905  may increase resistance between these two components, or may cause bonding issues, and so in some embodiments, a window  907  may be defined by the insulative material along a first surface  903  of the electrode tab  900 . The first surface  903  may be a surface to be coupled with the cap, and the window may be defined to expose a portion  912  of electrode tab  900 . The electrode tab  900  may be coupled with a cap at the exposed portion  912 , which may be exposed through the insulative material  905  at window  907 . 
     Window  907  may not expose the entire first surface  903  of electrode tab  900  at second end  902 . Insulative material  905  may be maintained on all edges of window  907 . As illustrated, the insulative material  905  may extend along the first surface  903  entirely around window  907 , which may maintain insulative material fully about corners at the exterior edge  904  of the electrode tab  900 . Although illustrated as a rectangular window, it is to be understood that window  907  may be formed as any shape or geometry. 
     The electrode tab  900  may be characterized by additional surfaces including a second surface  908  as illustrated in  FIG. 9B . Second surface  908  may be opposite first surface  903 . Second surface  908  may also be covered by insulative material  905 , which may cover all exposed surfaces at a peripheral end of the electrode tab. First surface  903  and second surface  908  may be joined with sidewalls, such as sidewall  906 , which may extend between the first surface  903  and the second surface  908 . As illustrated, sidewall surface  906  may also be contained or covered by insulative material  905 . The insulative material may be or include a tape, polymer, or other insulative material that may be applied or coated to the electrode tab  900  at second end  902 . Window  907  may be cut out from applied insulative material, or the application process may form the window during application of the insulative material. 
       FIG. 9C  illustrates another view of electrode tab  900 , which may show second surface  908 . As illustrated, second surface  908  may also include coverage or coating of insulative material  905 , which may extend fully across second surface  908  in embodiments. Additionally, a second window  910  may be defined in the insulative material  905  along the second surface  908  to expose a second portion  914  of electrode tab  900 . When formed, second window  910  may be positioned relative to first window  907 . For example, second window  910  may be located on second surface  908  opposite a position on first surface  903  at which window  907  has been defined. The second window  910  may allow welding from below the electrode tab  900  at second surface  908  to join or couple first surface  903  with the cap. The second window  910  may have any of the characteristics described above for first window  907 , and may be similar in shape, size, formation, or configuration. In some embodiments, second window  910  may be larger or smaller than first window  907 . Additionally, although window  907  may be formed during application of the insulation material, in some embodiments second window  910  may be formed during the welding or coupling process. For example, window  910  may not be formed on second surface  908 . However, a welding process may apply heat, current, or some other energy from second surface  908  to couple first surface  903  to a cap. The welding process may burn, cut, or otherwise remove insulative material  905  from second surface  908 , which may produce a window  910  and expose a second portion  912  of electrode tab  900 . By insulating the electrode tab  900  along exterior edges of the tab, further protection from shorting may be provided during events which may shift or move components within the battery. 
     In the preceding description, for the purposes of explanation, numerous details have been set forth in order to provide an understanding of various embodiments of the present technology. It will be apparent to one skilled in the art, however, that certain embodiments may be practiced without some of these details, or with additional details. 
     Having disclosed several embodiments, it will be recognized by those of skill in the art that various modifications, alternative constructions, and equivalents may be used without departing from the spirit of the embodiments. Additionally, a number of well-known processes and elements have not been described in order to avoid unnecessarily obscuring the present technology. Accordingly, the above description should not be taken as limiting the scope of the technology. 
     Where a range of values is provided, it is understood that each intervening value, to the smallest fraction of the unit of the lower limit, unless the context clearly dictates otherwise, between the upper and lower limits of that range is also specifically disclosed. Any narrower range between any stated values or unstated intervening values in a stated range and any other stated or intervening value in that stated range is encompassed. The upper and lower limits of those smaller ranges may independently be included or excluded in the range, and each range where either, neither, or both limits are included in the smaller ranges is also encompassed within the technology, subject to any specifically excluded limit in the stated range. Where the stated range includes one or both of the limits, ranges excluding either or both of those included limits are also included. Where multiple values are provided in a list, any range encompassing or based on any of those values is similarly specifically disclosed. 
     As used herein and in the appended claims, the singular forms “a”, “an”, and “the” include plural references unless the context clearly dictates otherwise. Thus, for example, reference to “a material” includes a plurality of such materials, and reference to “the cell” includes reference to one or more cells and equivalents thereof known to those skilled in the art, and so forth. 
     Also, the words “comprise(s)”, “comprising”, “contain(s)”, “containing”, “include(s)”, and “including”, when used in this specification and in the following claims, are intended to specify the presence of stated features, integers, components, or operations, but they do not preclude the presence or addition of one or more other features, integers, components, operations, acts, or groups.

Metadata:
Filing Date: 20180717
Publication Date: 20191015
Grant Date: 20191015
Priority Date: 20170502
Inventors: PASMA, CHRISTOPHER R.
HYUNG, YOOEUP
SHIU, BRIAN K.
WISLER, STEPHEN J.
Assignee: APPLE INC
CPC Classifications: [{"code": "H01M2220/30", "inventive": false, "first": false, "tree": "[]"}, {"code": "H01M2220/30", "inventive": false, "first": false, "tree": "[]"}, {"code": "H01M2004/028", "inventive": false, "first": false, "tree": "[]"}, {"code": "H01M4/36", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01M10/0587", "inventive": true, "first": true, "tree": "[]"}, {"code": "H01M50/533", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01M50/119", "inventive": false, "first": false, "tree": "[]"}, {"code": "H01M2/0277", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01M2/0285", "inventive": false, "first": false, "tree": "[]"}, {"code": "H01M4/36", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01M2/26", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01M2220/30", "inventive": false, "first": false, "tree": "[]"}, {"code": "H01M10/0587", "inventive": true, "first": true, "tree": "[]"}, {"code": "H01M2/0413", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01M2004/028", "inventive": false, "first": false, "tree": "[]"}, {"code": "H01M2/023", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01M50/533", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01M50/119", "inventive": false, "first": false, "tree": "[]"}, {"code": "Y02P70/50", "inventive": false, "first": false, "tree": "[]"}, {"code": "H01M50/116", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01M50/531", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01M50/166", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01M50/171", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01M50/56", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01M50/171", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01M50/56", "inventive": true, "first": true, "tree": "[]"}, {"code": "Y02E60/10", "inventive": false, "first": false, "tree": "[]"}]
Family ID: 64014965