Patent Publication Number: US-11658368-B2

Title: Button-type battery

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims priority to Chinese Patent Application No. 201920704685.6, filed on May 15, 2019, which is hereby incorporated by reference in its entirety. 
     TECHNICAL FIELD 
     The present disclosure relates to the technical field of batteries, and more specifically, to a button-type battery. 
     BACKGROUND 
     Currently, a battery, in the form of a cup, a reservoir, a container, or partial space in a complex container that contains an electrolyte and a metal electrode to generate current, refers to a device that can convert chemical energy into electrical energy. The battery has an anode and a cathode. With the advancement of technology, the battery generally refers to a small device that can generate electrical energy, such as a solar cell. Performance parameters of the battery mainly include electromotive force, capacity, specific energy and resistance. Using the battery as an energy source, a stable voltage, a stable current, a long-term stable power supply, and a current less influenced by the environment can be obtained. The battery has a simple structure, is portable, is easy to charge and discharge, is not influenced by weather and temperature, and has stable and reliable performance, playing a great role in all aspects of modern social life. 
     An existing battery structure includes a battery cover, a battery cup, a rolled cell and a plastic ring. The battery cover is arranged over the battery cup, the battery cover and the battery cup together enclose a battery cavity, the rolled cell is arranged in the battery cavity, and the plastic ring is arranged between the battery cover and the battery cup. However, in the existing battery structure, as the battery cover or the battery cup is not provided with a corresponding stopper, the battery cover is easily detached from the battery cup, resulting in exposure of the rolled cell, which leads to a significant potential security risk; in addition, since there is an electrolyte in the rolled cell, if the rolled cell is exposed and collided with an external object, it will easily cause the electrolyte to erupt, seriously endangering personal safety of a user. 
     SUMMARY 
     The present disclosure aims to address the drawbacks in the prior art, and to provide a button-type battery which can prevent a battery cover from being detached from a battery cup to cause the exposure of a rolled cell, the battery applies a strong locking force from the battery cup to the battery cover and greatly improves safety. 
     The purpose of the present disclosure is achieved by the following technical solutions: 
     a button-type battery, comprising: 
     a package assembly including: a battery cup including a sealing base and a sealing wall connected with each other, the sealing base and the sealing wall together forming a battery reservoir, and part of the sealing wall being recessed inwards in a direction to the battery reservoir so as to form a locking boss; a sealing plastic ring clamped onto the sealing wall; and a battery cover including a cap and a sealing edge connected with each other, part of the sealing edge being accommodated in the sealing plastic ring and the locking boss being pressed against part of the sealing plastic ring, so that the part of the sealing plastic ring is in tight contact with the sealing edge; and 
     a cell assembly including a rolled cell and an electrode tab, the rolled cell being disposed in the battery reservoir, the electrode tab being connected to the rolled cell and also connected with the sealing base and the cap respectively. 
     In an embodiment, the locking boss specifically includes a plurality of locking protrusions, each of the locking protrusions being pressed against the part of the sealing plastic ring so that the part of the sealing plastic ring is in tight contact with the sealing edge. 
     In an embodiment, each of the locking protrusions is equally distributed on the sealing wall. 
     In an embodiment, the sealing plastic ring comprises a plastic circumference of the sealing wall and a U-shaped accommodating ring connected with each other, the part of the sealing edge being accommodated in the U-shaped accommodating ring, the locking boss being pressed against part of the plastic circumference of the sealing wall, so that the part of the plastic circumference of the sealing wall is in tight contact with the sealing edge. 
     In an embodiment, the plastic circumference of the sealing wall and the U-shaped accommodating ring are of an integrally formed structure. 
     In an embodiment, the cell assembly further includes a central post located in a clearance hole provided in the rolled cell, an end of the central post being pressed against the electrode tab. 
     In an embodiment, the clearance hole is located at the middle of the rolled cell. 
     In an embodiment, the electrode tab specifically includes an anode tab and a cathode tab, the anode tab being connected to the rolled cell and the cap respectively, the cathode tab being connected to the rolled cell and the sealing base respectively, and the central post including a front post and a rear post connected with each other, the front post being pressed against the anode tab, and the rear post being pressed against the cathode tab. 
     In an embodiment, an anode insulator is provided between the front post and the anode tab. 
     In an embodiment, a cathode insulator is provided between the rear post and the cathode tab. 
     Advantages and beneficial effects of the present disclosure compared with the prior art are as follows: 
     The button-type battery of the present disclosure is provided with a package assembly and a cell assembly. In the actual application, as part of the sealing wall is recessed inwards in the direction to the battery reservoir so as to form the locking boss, and as such, when the battery cover is being assembled, the locking boss is pressed against the part of the sealing plastic ring so that the part of the sealing plastic ring is in tight contact with the sealing edge, and the battery cup can be locked to the battery cover by the locking boss, thereby preventing easy detachment of the battery cover from the battery cup to cause exposure of the rolled cell. The battery cover is applied with a strong locking force from the battery cup, greatly improving the safety of the button-type battery. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       In order to explain the technical solutions of the embodiments of the present disclosure more clearly, the embodiments with reference to the drawings if required will be briefly illustrated. It should be understood that the drawings hereinafter only show some embodiments of the present disclosure, and should not be seen as limitations to the scope of protection. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative work. 
         FIG.  1    is a schematic structural diagram of a button-type battery according to an embodiment of the present disclosure; 
         FIG.  2    is a schematic diagram of an internal structure of a button-type battery according to an embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     In order to facilitate understanding of the present disclosure, the present disclosure will be described more comprehensively below with reference to related drawings. The drawings show preferred embodiments of the present disclosure. However, the present disclosure can be implemented in many different fashions, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to disclose the present disclosure more thoroughly and comprehensively. 
     It should be noted that when an element is referred to be “fixed” to another element, it can be directly on the other element or there can be an interposed element. When an element is considered to be “connected” to another element, it may be directly connected to the other element or there can be an interposed element. The terms “vertical”, “horizontal”, “left”, “right” and similar expressions used herein are for illustrative purposes only and are not meant to be the only embodiments. 
     Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present disclosure. The terminology used in the description of the present disclosure herein is for the purpose of describing specific embodiments, and is not intended to limit the present disclosure. The term “and/or” as used herein includes any and all combinations of one or more related items. 
     Please refer to  FIGS.  1  and  2    for a button-type battery  10  including a package assembly  100  and a cell assembly  200 . 
     It should be noted that the package assembly  100  functions to package and protect; the cell assembly  200  functions to output voltage for supplying external electrical equipment with power. 
     Please refer to  FIG.  2    again. The package assembly  100  includes a battery cup  110 , a sealing plastic ring  120  and a battery cover  130 . The battery cup  110  includes a sealing base  111  and a sealing wall  112  connected with each other, the sealing base  111  and the sealing wall  112  together forming a battery reservoir. Part of the sealing wall  112  is recessed inwards in a direction to the battery reservoir so as to form a locking boss  113 . The sealing plastic ring  120  is clamped onto the sealing wall  112 . The battery cover  130  includes a cap  131  and a sealing edge  132  connected with each other. Part of the sealing edge  132  is accommodated in the sealing plastic ring  120 , and the locking boss  113  is pressed against part of the sealing plastic ring  120 , so that the part of the sealing plastic ring  120  is in tight contact with the sealing edge  132 . 
     It should be noted that in actual application, as part of the sealing wall  112  is recessed inwards in a direction to the battery reservoir so as to form the locking boss  113 , as such, when the battery cover  130  is being assembled, the locking boss  113  is pressed against the part of the sealing plastic ring  120  so that the part of the sealing plastic ring  120  is in tight contact with the sealing edge  132 , and the battery cup  110  can be locked to the battery cover  130  by the locking boss  113 , thereby preventing easy detachment of the battery cover  130  from the battery cup  110  to cause exposure of a rolled cell. The battery cover  130  is applied with a strong locking force from the battery cup  110 , greatly improving the safety of the button-type battery  10 . 
     It should also be noted that when there is excessive air pressure inside the battery reservoir, the battery cover  130  can be detached from the battery cup  110  by the action of the air pressure. Thus, pressure is timely relieved so as to prevent the button-type battery  10  from operating under excessive air pressure inside the battery reservoir. 
     Please refer to  FIG.  2    again. The cell assembly  200  includes a rolled cell  210  and an electrode tab  220 . The rolled cell  210  is disposed in the battery reservoir, the electrode tab  220  is connected to the rolled cell  210 , and the electrode tab  220  is also connected to the sealing base  111  and the cap  131  respectively. 
     It should be noted that the voltage output from the rolled cell  210  is aggregated to an external power supply device through the electrode tab  220 ; in addition, since the electrode tab  220  is connected to the sealing base  111  and the cap  131  respectively, an electrode of the button-type battery  10  can be led out by a user from the sealing base  111  and the cap  131 . 
     Further, in an embodiment, the locking boss  113  specifically includes a plurality of locking protrusions, each locking protrusion being pressed against part of the sealing plastic ring  120  so that the part of the sealing plastic ring  120  is in tight contact with the sealing edge  132 . 
     It should be noted that the locking boss  113  can be processed into a plurality of discontinuous locking protrusions. The locking boss  113  includes a plurality of locking protrusions, each locking protrusion being pressed against part of the sealing plastic ring  120  so that the part of the sealing plastic ring  120  is in tight contact with the sealing edge  132 . That is, the locking boss  113  includes the plurality of discontinuous locking protrusions, each locking protrusion being used to press against the sealing plastic ring  120 . When there is only one locking boss  113  on the battery cup  110 , the locking boss  113  includes a continuous boss, which play the same role as the discontinuous locking protrusions although apparently different. Specifically, the locking protrusions are equally distributed on the sealing wall  112 . 
     Still further, please refer to  FIG.  2    again. In an embodiment, the sealing plastic ring  120  includes a plastic circumference  121  of the sealing wall and a U-shaped accommodating ring  122  connected with each other, and the part of the sealing edge  132  is accommodated in the U-shaped accommodating ring  122 . The locking boss is pressed against part of the plastic circumference  121  of the sealing wall so that the part of the plastic circumference  121  of the sealing wall is in tight contact with the sealing edge  132 . 
     It should be noted that both of the plastic circumference  121  of the sealing wall and the U-shaped accommodating ring  122  are waterproof, and improve waterproof performance of the button-type battery  10 . Specifically, the plastic circumference  121  of the sealing wall and the U-shaped accommodating ring  122  are formed integrally. It should be noted that the integrally formed structure of the plastic circumference  121  of the sealing wall and the U-shaped accommodating ring  122  can extend the overall service life of the sealing plastic ring  120 . 
     Still further, please refer to  FIG.  2    again. In an embodiment, the cell assembly  200  further includes a central post  230 . A clearance hole  211  is provided in the rolled cell  210 , the central post  230  is located in the clearance hole  211 , and an end of the central post  230  is pressed against the electrode tab  220 . 
     It should be noted that the central post  230  functions to support and protect, to prevent the battery cover  130  from being pressed down too much to compress the rolled cell  210 ; at the same time, the central post  230  can prevent the rolled cell  210  from expanding. 
     Still further, please refer to  FIG.  2    again. In an embodiment, a clearance hole  211  is located at the middle of the rolled cell  210 . 
     It should be noted that the clearance hole  211  is located at the middle of the rolled cell  210  so that the central post  230  and the rolled cell  210  are under uniform stress. 
     Still further, please refer to  FIG.  2    again. In an embodiment, the electrode tab  220  specifically includes an anode tab  221  and a cathode tab  222 . The anode tab  221  is connected to the rolled cell  210  and the cap  131  respectively, and the cathode tab  222  is connected to the rolled cell  210  and the sealing base  111  respectively. The central post  230  includes a front post  231  and a rear post  232  connected with each other. The front post  231  is pressed against the anode tab  221 , and the rear post  232  is pressed against the cathode tab  222 . 
     It should be noted that the voltage output from the rolled cell  210  is output through the anode tab  221  and the cathode tab  222 . 
     Still further, in an embodiment, an anode insulator is provided between the front post  231  and the anode tab  221 . 
     As such, it should be noted that the anode insulator functions to insulate. 
     Still further, in an embodiment, a cathode insulator is provided between the rear post  232  and the cathode tab  222 . 
     As such, it should be noted that the cathode insulator functions to insulate. 
     The button-type battery of the present disclosure is provided with a package assembly and a cell assembly. In the actual application, as part of the sealing wall is recessed inwards in a direction to the battery reservoir so as to form a locking boss, as such, when the battery cover is being assembled, the locking boss is pressed against the part of the sealing plastic ring so that the part of the sealing plastic ring is in tight contact with the sealing edge, and the battery cup can be locked to the battery cover by means of the locking boss, thereby preventing easy detachment of the battery cover from the battery cup to cause exposure of the rolled cell. The battery cover is applied with a strong locking force from the battery cup, greatly improving the safety of the button-type battery. 
     The above-mentioned embodiments are only several embodiments of the present disclosure, and descriptions thereof are specific and detailed, but they should not be construed as limiting the scope of the present disclosure. It should be noted that for those of ordinary skill in the art, a number of modifications and improvements falling within the protection scope of the present disclosure can also be implemented without departing from the concept of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the appended claims.