Patent Publication Number: US-2023163425-A1

Title: Battery connection module

Description:
RELATED APPLICATIONS 
     This application claims priority to Chinese Patent Applications Serial No. 202122905632.0 filed on Nov. 24, 2021, which is incorporated herein by reference in its entirety. 
     TECHNICAL FIELD 
     The present disclosure relates to the field of battery technology, and specifically relates to a battery connection module. 
     BACKGROUND ART 
     Chinese utility model patent application issuance publication No. CN209515832U discloses a connecting board used to a battery pack and a battery pack integrated cover board assembly, and specifically discloses that a first flexible circuit board and a second flexible circuit board act as battery cell circuit boards, a third flexible circuit board acts as an output circuit board, and an adapting circuit board is a rigid print circuit board. The first flexible circuit board and the second flexible circuit board are connected to the third flexible circuit board  133  via the adapting circuit board. However, the above patent document does not disclose how to solve a problem on circuit cross, and with a combination, for example, of the three flexible circuit boards and the adapting circuit board, material and manufacturing cost are also high. 
     Japanese patent application publication No. JPH07321433A discloses a thick film circuit board device, and specifically discloses that circuit elements formed on a single layer thick film substrate are electrically connected via conductors, two conductors of the conductors which crosses one conductor of the conductors are provided with a binding wire therebetween for cross wiring. The binding wire is connected to the two conductors by direct welding. Such cross wiring construction with the binding wire is suitable to a hard board, but is not suitable to a flexible circuit board, because the flexible circuit board is deflectable, the binding wire is prone to generate poor binding, be damaged or broken, and additional manufacturing cost will be increased. 
     In the field of power battery for vehicle, on a battery connection module connecting a plurality of batteries in a battery pack, because a space of the flexible circuit board is limited, and when circuits are connected to connector connecting points, because an arrangement of the connector connecting points may be dense or in multiple rows, or some of the connector connecting points are designated to connect some designated circuits, so a part of the circuits have to cross each other, thus at present, only the flexible circuit board used to the battery connection module necessarily is an at least double layer flexible circuit board, can the circuits cross. However, the double layer or more flexible circuit board is high in price, cost burden is very large. If a single layer flexible circuit board is employed, price is much cheaper, and cost burden may be significantly lowered. However, the above existing technologies in the field of battery connection module cannot solve the problem on circuit cross with the single layer flexible circuit board. 
     SUMMARY 
     Therefore, an object of the present disclosure is to provide a battery connection module to solve a problem on circuit cross with a single layer flexible circuit board. 
     In embodiments of the present disclosure, a battery connection module is used to connect a plurality of batteries, comprises a plurality of busbars, a connector, a single layer wiring flexible circuit board and a strengthening back board. The plurality of busbars are used to connect the plurality of batteries, the connector comprises a plurality of conductive terminals, the single layer wiring flexible circuit board comprises a plurality of terminal connecting points which are used to connect the plurality of conductive terminals and multiple traces which are connected with respective terminal connecting points, the strengthening back board corresponds to the connector in position and is provided on the single layer wiring flexible circuit board; the strengthening back board is provided with an adapting trace thereon; the multiple traces comprise at least one first trace; the first trace is adapted to the adapting trace on the strengthening back board, and then is adapted back to one of the plurality of terminal connecting points of the single layer wiring flexible circuit board via the adapting trace. 
     According to some embodiments of the present disclosure, the plurality of terminal connecting points comprise at least one first terminal connecting point; the multiple traces further comprise a second trace; a tip of the first trace has an end portion connecting point; one end of the adapting trace has a first end portion connecting point and the other end of the adapting trace has a second end portion connecting point; one end of the second trace has an end portion connecting point, the other end of the second trace is connected to the first terminal connecting point; the end portion connecting point of the first trace is connected to the first end portion connecting point of the adapting trace, the second end portion connecting point of the adapting trace is connected to the end portion connecting point of the second trace of the single layer wiring flexible circuit board. 
     According to some embodiments of the present disclosure, the single layer wiring flexible circuit board is positioned between the connector and the strengthening back board; the connector employs surface mounted technology, the plurality of terminal connecting points each are constructed as a terminal connecting point which employs a surface welding pad form, tail portions of the plurality of conductive terminals are surface welded to the respective terminal connecting points of the single layer wiring flexible circuit board. 
     According to some embodiments of the present disclosure, the plurality of terminal connecting points comprise at least one second terminal connecting point; a tip of the first trace has an end portion connecting point; one end of the adapting trace has a first end portion connecting point and the other end of the adapting trace has a second end portion connecting point; the end portion connecting point of the first trace is connected to the first end portion connecting point of the adapting trace, the second end portion connecting point of the adapting trace is directly connected to the second terminal connecting point of the single layer wiring flexible circuit board. 
     According to some embodiments of the present disclosure, the connector employs through hole type and is non-void pin type; the plurality of terminal connecting points each are constructed as a through hole type terminal connecting point; the strengthening back board comprises a plurality of penetrating holes; tail portions of the plurality conductive terminals respectively pass through the plurality of penetrating holes of the strengthening back board and are respectively welded to the plurality of terminal connecting points which each are constructed as the through hole type terminal connecting point; the second end portion connecting point of the adapting trace is constructed on one of the plurality of penetrating holes of the strengthening back board. 
     According to some embodiments of the present disclosure, the plurality of terminal connecting points comprise at least one third terminal connecting point and at least one fourth terminal connecting point; a tip of the first trace is connected on the third terminal connecting point; the adapting trace has a first end portion connecting point and a second end portion connecting point; the first trace is connected to the first end portion connecting point of the adapting trace via the third terminal connecting point, the second end portion connecting point of the adapting trace is directly connected to the fourth terminal connecting point of the single layer wiring flexible circuit board. 
     According to some embodiments of the present disclosure, the connector employs through hole type and is a void pin type; the plurality of terminal connecting point each are constructed as a through hole type terminal connecting point; the strengthening back board comprises a plurality of penetrating holes; tail portions of the plurality of conductive terminals pass through the respective penetrating holes of the strengthening back board and are welded to the respective terminal connecting points which each are constructed as the through hole type terminal connecting point; the first trace is connected on the third terminal connecting point which is void and corresponds to a void pin of the connector; the first end portion connecting point and the second end portion connecting point of the adapting trace are respectively constructed on two of the plurality of penetrating holes of the strengthening back board. 
     According to some embodiments of the present disclosure, the strengthening back board is positioned between the connector and the single layer wiring flexible circuit board. 
     One embodiment of the present disclosure at least has the following advantages or beneficial effects: the first trace required to be jumped or spanned on the single layer wiring flexible circuit board is adapted to the strengthening back board and is adapted back to the terminal connecting point of the single layer wiring flexible circuit board, so that the strengthening back board functions as not only assembling the connector but also an adapting circuit board for jumping or spanning. Such a manner that directly uses the strengthening back board to solve circuit cross wiring is capable of applying the single layer wiring flexible circuit board on the battery connection module and solving a problem on circuit cross, which significantly lowers cost. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a schematic view of a battery pack of a first embodiment of the present disclosure. 
         FIG.  2    is a schematic view of a part of a battery connection module of the first embodiment of the present disclosure. 
         FIG.  3    is an exploded schematic view of  FIG.  2   . 
         FIG.  4    is an exploded schematic view of a connector, a single layer wiring flexible circuit board and a strengthening back board of the first embodiment of the present disclosure. 
         FIG.  5    is a schematic view of a connector, a single layer wiring flexible circuit board and a strengthening back board of a second embodiment of the present disclosure after assembled. 
         FIG.  6    is an exploded schematic view of  FIG.  5   . 
         FIG.  7    is an exploded schematic view of a connector, a single layer wiring flexible circuit board and a strengthening back board of a third embodiment of the present disclosure. 
         FIG.  8    is a partially enlarged view of  FIG.  3    indicated by a circle A. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments, can be implemented in various fouiis and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted. 
     As shown in  FIG.  1   ,  FIG.  1    is a schematic view a battery pack  10  of a first embodiment of the present disclosure. The battery pack  10  of the embodiment of the present disclosure includes a battery connection module  100  and a battery set  200 , the battery connection module  100  may be provided above the battery set  200  and is used to connect a plurality of batteries  201  of the battery set  200 , the battery connection module  100  is used to detect voltages, temperatures or other battery parameters of the plurality of batteries  201 . 
     It may be understood that the plurality of batteries  201  may be connected in parallel or in series by means of the battery connection module  100 . 
     It is noted that, the term “include”, “contain”, “has” and any variants thereof are intended to cover nonexclusive inclusion. For example, a process, method, system, product or device containing a series of steps or units is not limited to the step or unit which is listed, but optionally further includes a step or a unit which is not listed, or optionally further includes other step or assembly which is inherent to the process, method, product or device. 
     As shown in  FIG.  2    and  FIG.  3   ,  FIG.  2    is a schematic view of a part of the battery connection module  100  of the first embodiment of the present disclosure, and  FIG.  3    is an exploded schematic view of  FIG.  2   . The battery connection module  100  of the embodiment of the present disclosure includes a carrying tray  1 , a plurality of busbars  2 , a connector  3 , a single layer wiring flexible circuit board  4  and a strengthening back board  5 . 
     The carrying tray  1 , for example, may be integrally formed by an insulating material, and may be a rectangular structure which extends along a length direction D1 and a width direction D2 with the length direction D1 and the width direction D2 being perpendicular to each other. 
     The carrying tray  1  includes a tray body  11  and a side wall  12  which is integrally constructed to the tray body  11 , the side wall  12  is provided at an edge of the tray body  11 . The carrying tray  1  includes a plurality of receiving grooves  13 , the plurality of receiving grooves  13  are used to receive the plurality of busbars  2  respectively. 
     The carrying tray  1  further includes a plurality of partitioning walls  16 . The plurality of partitioning walls  16  each make one end connected an inner wall of the side wall  12  and make the other end extend toward the interior of the carrying tray  1 , so as to partition the plurality of the receiving grooves  13 . In some embodiments, each partitioning wall  16  may be perpendicular to the side wall  12 , but is not limited thereto, for example, the partitioning wall  16  and the side wall  12  also may be provided with an angle. 
     The carrying tray  1  further includes a plurality of supporting portions  14 , each receiving groove  13  is provided with one supporting portion  14  therein. The supporting portion  14  may be an elongated structure, and may be provided parallel to the partitioning wall  16  to partition each receiving groove  13  into two sub-recessed grooves  131 . That is to say, along the length direction D1, the supporting portions  14  and the partitioning walls  16  are alternately provided. When the busbar  2  is mounted in the receiving groove  13 , the supporting portion  14  is used to support the busbar  2 . The two sub-recessed grooves  131  are respectively used to receive two electrode connecting portions  21  of the busbar  2 . 
     The carrying tray  1  further includes a plurality of pressing against members  15 , each sub-recessed groove  131  may be provided with one or a plurality of pressing against members  15 . Here, “a plurality of” refers to two or more than two. When the busbar  2  is mounted in the receiving groove  13 , the pressing against member  15  is capable of pressing against the electrode connecting portion  21  of the busbar  2  to prevent the busbar  2  from being detached from the receiving groove  13 . In some embodiments, the pressing against member  15  may be an elastic latch, but is not limited thereto. 
     It is noted that, under cooperative action of the partitioning walls  16 , the supporting portion  14  and the pressing against member  15 , the busbar  2  is limited in the receiving groove  13 , however, the busbar  2  is not absolutely fixed relative to the carrying tray  1 , but the busbar  2  may has a tiny movement relative to the carrying tray  1  so as to accommodate a subsequent ultrasonic welding process. 
     Continuously referring to  FIG.  2    and  FIG.  3   , the carrying tray  1  further includes a latching post  17 , the latching post  17  protrudes from the tray body  11  and is used to latch with a latching hole  43  of the single layer wiring flexible circuit board  4 . As shown in  FIG.  8   ,  FIG.  8    is a partially enlarged view of  FIG.  3    indicated by a circle A. The latching post  17  includes a pair of latching hooks  171  used to latch with the latching hole  43 . 
     The plurality of busbars  2  may be respectively provided in the plurality of receiving grooves  13  of the carrying tray  1 , and may be mechanically and electrically connected with electrodes of the respective batteries  201  by welding (for example ultrasonic welding). And, by that the busbars  2  are staggeringly provided, the plurality of batteries  201  constitute a power circuit in series or in parallel from beginning to end. 
     Each busbar  2  may be integrally formed by bending a conductive material. The plurality of busbars  2  are used to connect the plurality of batteries  201 . The busbar  2  has two or more electrode connecting portions  21  and a buffering portion  22  which is positioned between two adjacent electrode connecting portions  21 . In the present embodiment, the busbar  2  has two electrode connecting portions  21 . 
     Continuously referring to  FIG.  2    and  FIG.  3   , the single layer wiring flexible circuit board  4  is assembled on the carrying tray  1  and extends along the length direction D1. As described above, the single layer wiring flexible circuit board  4  has the latching hole  43 , when the single layer wiring flexible circuit board  4  and the carrying tray  1  are assembled, the latching post  17  and the latching hole  43  latch with each other. 
     The single layer wiring flexible circuit board  4  includes a plurality of flexible supporting arms  44  which extend out from the single layer wiring flexible circuit board  4  and are used to connect the plurality of busbars  2 . 
     The battery connection module  100  of the embodiment of the present disclosure further includes a plurality of metal bridging pieces  6 , one end of the metal bridging piece  6  is connected to the flexible supporting arm  44 , and the other end of the metal bridging piece  6  is connected to the busbar  2 . 
     In some embodiments, the metal bridging piece  6  may be connected to the flexible supporting arm  44  and the busbar  2  by welding. 
     It is noted that, each metal bridging piece  6  may be connected with a voltage collecting circuit trace (not shown) of the single layer wiring flexible circuit board  4  for collecting a voltage. And, the metal bridging piece  6  connected with the voltage collecting circuit trace is adjacent to a temperature sensor  45 , the temperature sensor  45  is provided on the flexible supporting arm  44 , the temperature sensor  45  may be connected with a temperature collecting circuit trace (not shown) of the single layer wiring flexible circuit board  4 . 
     It may be understood that, a material of the metal bridging piece  6  may be a metal material having good thermal conductivity (for example, an aluminum piece), or may be a metal material having both thermal conductivity and electrical conductivity (for example, a nickel piece). 
     The connector  3  is connected to the single layer wiring flexible circuit board  4 , and is capable of being connected with a battery management system (not shown) so as to transmit temperature information and/or voltage information collected by the single layer wiring flexible circuit board  4  to the battery management system. 
     The strengthening back board  5  corresponds to the connector  3  in position and is provided to the single layer wiring flexible circuit board  4 . 
     As shown in  FIG.  4   ,  FIG.  4    is an exploded schematic view of the connector  3 , the single layer wiring flexible circuit board  4  and the strengthening back board  5  of the first embodiment of the present disclosure. The single layer wiring flexible circuit board  4  is positioned between the connector  3  and the strengthening back board  5 . The connector  3  includes a plurality of conductive terminals  31 , each conductive terminal  31  is made from a conductive material and is integrally formed by bending. 
     The single layer wiring flexible circuit board  4  includes a plurality of terminal connecting points  41  and multiple traces  42  which are connected with respective terminal connecting points  41 . The plurality of busbar  2  are connected to the plurality of terminal connecting points  41  by the multiple traces  42 . The plurality of conductive terminals  31  of the connector  3  are connected with the plurality of terminal connecting points  41  correspondingly. It is noted that, in order to clearly illustrate a structure or construction of the single layer wiring flexible circuit board  4 ,  FIG.  4    only illustrates a part of the multiple traces  42 . 
     The strengthening back board  5  is provided with an adapting trace  51  thereon, the multiple traces  42  of the single layer wiring flexible circuit board  4  include at least one first trace  421 , the first trace  421  is connected to the terminal connecting point  41  of the single layer wiring flexible circuit board  4  via the adapting trace  51 . Here, the first trace  421  is a trace which is required to be jumped or spanned on the single layer wiring flexible circuit board  4 . 
     In the embodiments of the present disclosure, the terms “first”, “second” and “third” are only used for the purpose of description, and cannot be construed as indicating or implying relative importance. 
     As such, the first trace  421  required to be jumped or spanned on the single layer wiring flexible circuit board  4  is adapted to the strengthening back board  5  and is adapted back to the terminal connecting point  41  of the single layer wiring flexible circuit board  4 , so that the strengthening back board  5  functions as not only assembling the connector  3  but also an adapting circuit board for jumping or spanning Such a manner that directly uses the strengthening back board  5  to solve circuit cross wiring is capable of applying the single layer wiring flexible circuit board  4  on the battery connection module  100  and solving a problem on circuit cross, which significantly lowers cost. 
     It is noted that, the single layer wiring flexible circuit board  4  refers to a flexible circuit board that conductive traces are arranged in a single plane, so all the conductive traces of the single layer wiring flexible circuit board  4  cannot cross each other. In addition to a wiring layer with respect to the traces, the single layer wiring flexible circuit board  4  may at least include an insulating substrate which allows the conductive traces to be provided and an insulating layer which covers the conductive traces. 
     In addition, it may be understood that, the traces of the single layer wiring flexible circuit board  4  may be connected with the busbars  2 , of course, also may be connected with the temperature sensors  45 . 
     It is noted that, the terms “mounted”, “connected with”, “connect” and the like should be understood in a broad sense, “connect” either may be direct connection or may be indirect connection via an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present disclosure according to specific situations. 
     Continuously referring to  FIG.  4   , the multiple traces  42  further include a second trace  422 . The first trace  421  is adapted to one end of the adapting trace  51 , the other end of the adapting trace  51  is adapted back to the second trace  422  of the single layer wiring flexible circuit board  4 . 
     Specifically, a tip of the first trace  421  has an end portion connecting point  4211 , one end of the adapting trace  51  has a first end portion connecting point  511  and the other end of the adapting trace  51  has a second end portion connecting point  512 . The end portion connecting point  4211  of the first trace  421  is connected to the first end portion connecting point  511  of the adapting trace  51 , the second end portion connecting point  512  of the adapting trace  51  connected to the end portion connecting point  4221  of the second trace  422 . 
     The end portion connecting point  4211  of the first trace  421  is constructed as a conductive through hole, and the conductive through hole penetrates an upper surface and a lower surface of the single layer wiring flexible circuit board  4 . And, conductive rings which are circle surround openings of the conductive through hole on the upper surface and the lower surface respectively, an inner wall of the conductive through hole is provided with a conductive layer. The first end portion connecting point  511  and the second end portion connecting point  512  at two ends of the adapting trace  51  are constructed as enlarged conductive pads. The conductive through hole of the first trace  421  of the end portion connecting point  4211  may be connected with the first end portion connecting point  511  of the adapting trace  51  by welding. The end portion connecting point  4221  of the second trace  422  also is constructed as a conductive through hole, the conductive through hole of the second trace  422  may be connected with the second end portion connecting point  512  of the adapting trace  51  by welding. 
     That is to say, the end portion connecting point  4211  of the first trace  421  is adapted to the first end portion connecting point  511  of the adapting trace  51  by welding, the second end portion connecting point  512  of the adapting trace  51  is adapted to the end portion connecting point  4221  of the second trace  422  by welding, finally an object that the first trace  421  required to be jumped or spanned is adapted to the strengthening back board  5  and then adapted back to a first terminal connecting point  41   a  of the single layer wiring flexible circuit board  4  is attained. Here, the first terminal connecting point  41   a  is one of the plurality of terminal connecting points  41 , and is the terminal connecting point  41  to which the tip of the first trace  421  required to jumped or spanned is adapted. 
     In the present embodiment, the connector  3  is mounted on the single layer wiring flexible circuit board  4  with surface mounted technology (SMT). The plurality of terminal connecting point  41  each are constructed as a terminal connecting point  41  which employs a surface welding pad form, tail portions of the plurality of conductive terminals  31  are surface welded to the respective terminal connecting points  41  of the single layer wiring flexible circuit board  4 . 
     As shown in  FIG.  5    and  FIG.  6   ,  FIG.  5    is a schematic view of a connector  3 , a single layer wiring flexible circuit board  4  and a strengthening back board  5  of a second embodiment of the present disclosure after assembled, and  FIG.  6    is an exploded schematic view of  FIG.  5   . A connected manner of the connector  3 , the single layer wiring flexible circuit board  4  and the strengthening back board  5  of the second embodiment of the present disclosure differs from the first embodiment in that: the connector  3  of the present embodiment is mounted on the single layer wiring flexible circuit board  4  with through hole type and non-void pin type, and the end portion connecting point  4211  of the first trace  421  is adapted to the first end portion connecting point  511  of the adapting trace  51 , the second end portion connecting point  512  of the adapting trace  51  is directly connected to a second terminal connecting point  41   b  of the single layer wiring flexible circuit board  4 . Here, the second terminal connecting point  41   b  is one of the plurality of terminal connecting points  41 , and is the terminal connecting point  41  to which a tip of the first trace  421  required to be jumped or spanned is adapted. 
     Specifically, the connector  3  is mounted on the single layer wiring flexible circuit board  4  with through hole type, and the connector  3  is non-void pin type. The connector  3  has a plurality of conductive terminals  31 , and each conductive terminal  31  is pin type. The terminal plurality of connecting points  41  of the single layer wiring flexible circuit board  4  each are constructed as a conductive through hole, and the conductive through hole penetrates an upper surface and a lower surface of the single layer wiring flexible circuit board  4 . And, conductive rings which are circle surround openings of the conductive through hole at the upper surface and the lower surface respectively, an inner wall of the conductive through hole is provided with a conductive layer. 
     The plurality of conductive terminals  31  pass through the conductive through holes by one to one correspondence, and electrical connection between the connector  3  and the single layer wiring flexible circuit board  4  is attained by welding. 
     The strengthening back board  5  is positioned between the connector  3  and the single layer wiring flexible circuit board  4 , and includes a plurality of penetrating holes  52 , each penetrating hole  52  is constructed as a conductive through hole, the plurality of penetrating holes  52 , the plurality of conductive terminals  31  of the connector  3  and the plurality of terminal connecting points  41  correspond to each other by one to one, that is, tail portions of the plurality of conductive terminals  31  respectively pass through the plurality of penetrating holes  52  and the plurality of terminal connecting points  41  by one to one correspondence. 
     The end portion connecting point  4211  of the first trace  421  is constructed as a conductive through hole, the first end portion connecting point  511  of the adapting trace  51  is constructed as a conductive through hole, the second end portion connecting point  512  of the adapting trace  51  is constructed on one penetrating hole  52  of the strengthening back board  5  and is constructed as a conductive through hole. 
     As such, the connector  3  of the present embodiment employs through hole type and is non-void pin type, the tail portions of the plurality of conductive terminals  31  respectively pass through the plurality of penetrating holes  52  of the strengthening back board  5  and are respectively welded to the plurality of terminal connecting points  41  (the through hole type terminal connecting points  41 ) of the single layer wiring flexible circuit board  4 . The first trace  421  of the single layer wiring flexible circuit board  4  required to be jumped or spanned is adapted to the adapting trace  51  on the strengthening back board  5 , and then is directly adapted to the second terminal connecting point  41   b  (the through hole type terminal connecting point) of the single layer wiring flexible circuit board  4  by the adapting trace  51 . 
     As shown in  FIG.  7   ,  FIG.  7    is an exploded schematic view of a connector  3 , a single layer wiring flexible circuit board  4  and a strengthening back board  5  of a third embodiment of the present disclosure. A connected manner of the connector  3 , the single layer wiring flexible circuit board  4  and the strengthening back board  5  of the third embodiment of the present disclosure differs from the second embodiment in that: a tip of the first trace  421  is connected on a third terminal connecting point  41   c , the first trace  421  is connected to the first end portion connecting point  511  of the adapting trace  51  via the third terminal connecting point  41   c , the second end portion connecting point  512  of the adapting trace  51  is directly connected to a fourth terminal connecting point  41   d  of the single layer wiring flexible circuit board  4 . 
     Specifically, the connector  3  is mounted on the single layer wiring flexible circuit board  4  with through hole type, and connector  3  is a void pin type. The connector  3  has a plurality of conductive terminals  31 , each conductive terminal  31  is pin type. The plurality of terminal connecting points  41  of the single layer wiring flexible circuit board  4  each are constructed as a conductive through hole, the strengthening back board  5  is positioned between the connector  3  and the single layer wiring flexible circuit board  4 , and includes a plurality of penetrating holes  52 , each penetrating hole  52  is constructed as a conductive through hole. 
     It is noted that, that the connector  3  is a void pin type refers to that the connector  3  is at least assembled with one conductive terminal  31 , a position of the connector  3  where there is not conductive terminal to be assembled constitutes a void pin  32 , the terminal connecting point  41  of the single layer wiring flexible circuit board  4  which corresponds to the void pin  32  in position is not connected. That is to say, at least one of the plurality of terminal connecting points  41  of the single layer wiring flexible circuit board  4  is not connected to the conductive terminal  31  of the connector  3 . 
     In the present embodiment, both the third terminal connecting point  41   c  and the fourth terminal connecting point  41   d  are two different terminal connecting points  41  positioned on the single layer wiring flexible circuit board  4 , here, the third terminal connecting point  41   c  is an void terminal connecting point  41  corresponding to the void pin  32 , the fourth terminal connecting point  41   d  is the terminal connecting point  41  to which the tip of the first trace  421  required to be jumped or spanned is adapted. 
     The first end portion connecting point  511  and the second end portion connecting point  512  of the adapting trace  51  are respectively constructed on the two penetrating holes  52  of the strengthening back board  5 , and are conductive through hole structures. One penetrating hole  52  of the two penetrating holes  52  corresponds to the void pin  32  of the connector  3 , that is, the one penetrating hole  52  also corresponds to the void third terminal connecting point  41   c.    
     The first trace  421  is connected on the void third terminal connecting point  41   c  which corresponds to the void pin  32  of the connector  3 , and is adapted to the first end portion connecting point  511  of the adapting trace  51  by welding. The second end portion connecting point  512  of the adapting trace  51  is directly connected to the fourth terminal connecting point  41   d  of the single layer wiring flexible circuit board  4 . 
     As such, the present embodiment connector  3  is through hole type and is a void pin type, the tail portions of the plurality of conductive terminals  31  passes through the respective penetrating holes  52  of the strengthening back board  5  and are welded to the respective terminal connecting points  41  (the through hole type terminal connecting points) of the single layer wiring flexible circuit board  4 . The first trace  421  of the single layer wiring flexible circuit board  4  required to be jumped or spanned is connected to the adapting trace  51  on the strengthening back board  5  via the void third terminal connecting point  41   c  which corresponds to the void pin  32 , and then is directly connected to the fourth terminal connecting point  41   d  (the through hole type terminal connecting point) of single layer wiring flexible circuit board  4  via the adapting trace  51 . 
     In conclusion, advantages and beneficial effects of the battery connection module  100  of the embodiments of the present disclosure at least include: the first trace  421  required to be jumped or spanned on the single layer wiring flexible circuit board  4  is adapted to the strengthening back board  5  and is adapted back to the terminal connecting point  41  of the single layer wiring flexible circuit board  4 , so that the strengthening back board  5  functions as not only assembling the connector  3  but also an adapting circuit board for jumping or spanning. Such a manner that directly uses the strengthening back board  5  to solve circuit cross wiring is capable of applying the single layer wiring flexible circuit board  4  on the battery connection module  100  and solving a problem on circuit cross, which significantly lowers cost. 
     In the description of the embodiments of the present disclosure, it should be understood that the orientations or positional relationships indicated by the terms “upper”, “lower”, “left”, “right”, “front”, “rear”, etc. are based on those shown in the accompanying drawings. The orientation or positional relationship is only for the convenience of describing the embodiments of the disclosure and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore should not be construed as limit to embodiments of present disclosure. 
     In the description of this specification, the description of the terms “one embodiment”, “some embodiments”, “specific embodiment”, etc. means that a specific feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of embodiments of the present disclosure. In this specification, schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific feature, structure, material or characteristic described may be combined in any suitable manner in any one or more embodiments or examples 
     The above are only preferred embodiments of the embodiments of the present disclosure, and are not intended to limit the embodiments of the present disclosure. For those skilled in the art, the embodiments of the present disclosure may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the embodiments of the present disclosure should be included within the protection scope of the embodiments of the present disclosure.