Battery pack

Abstract

The utility model discloses a battery pack which comprises a module, the module comprises a plurality of battery cells stacked along a first direction, positive poles and negative poles of the battery cells are positioned on the same side of the battery cells along a second direction, and the first direction is perpendicular to the second direction; the plurality of connecting pieces are used for connecting the positive poles and the negative poles of any two adjacent battery cells; and the PCB is positioned on one side, close to the positive pole column, of the battery cell along the second direction, is connected with each battery cell in a bonding manner, and is connected with the plurality of connecting pieces respectively. According to the battery pack disclosed by the utility model, information such as voltage or temperature of each battery cell can be acquired through the PCB, and the PCB is connected with each battery cell in a bonding manner, so that the PCB plays a role in fixing each battery cell, the expansion constraint effect on the battery cells is relatively good, the stability of the battery cells in a long-term use process is ensured, the integration level of the battery pack is improved, and the battery pack is suitable for popularization and application. The cost of the battery pack is reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery pack. Background Technology

[0002] Battery packs typically consist of multiple modules, each composed of a series of closely packed battery cells. The arrangement and securing of these cells is crucial during battery pack assembly, directly impacting the overall performance and safety of the pack. Currently, cable ties are commonly used to secure cells and modules; however, this method is not ideal for controlling cell expansion during charging and discharging, and it also presents significant assembly challenges. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a battery pack whose PCB board performs the dual functions of data acquisition and constraint of cell expansion, effectively reducing the cost of the battery pack.

[0004] A battery pack according to an embodiment of the present invention includes: a module comprising a plurality of battery cells stacked along a first direction, wherein the positive and negative terminals of the battery cells are located on the same side of the battery cells along a second direction, and the first direction and the second direction are perpendicular; a plurality of connectors for connecting the positive and negative terminals of any two adjacent battery cells; and a PCB board located on the side of the battery cells along the second direction near the positive terminal and bonded to each battery cell, wherein the PCB board is connected to the plurality of connectors respectively.

[0005] According to an embodiment of the present invention, the battery pack module includes multiple battery cells stacked along a first direction. The positive and negative terminals of each battery cell are located on the same side of the cell along a second direction. Multiple connectors are used to connect the positive and negative terminals of any two adjacent battery cells. A PCB board is connected to each of the multiple connectors, allowing the PCB board to collect information such as voltage or temperature from each battery cell. Since both the connectors and the PCB board are located on the same side of the cell along the second direction, it is convenient for the PCB board to be connected to the multiple connectors, simplifying the battery pack structure and reducing assembly difficulty. Simultaneously, the PCB board is bonded to each battery cell, providing a fixing effect and better constraint on cell expansion, ensuring the stability of the cells during long-term use, improving the integration of the battery pack, and reducing the cost of the battery pack.

[0006] In some embodiments of this utility model, the plurality of connectors are located on both sides of the PCB board along a third direction, and further include:

[0007] The adapter is a plurality of adapters that correspond one-to-one with the connector. The adapter is located on the side of the PCB board away from the battery cell, and the two ends of the adapter along its length are respectively connected to the connector and the PCB board.

[0008] In some embodiments of this utility model, the adapter includes a first segment, a second segment, and a third segment. The first segment and the third segment extend along the third direction. The two ends of the first segment in the length direction are respectively connected to the connector and the second segment. The end of the second segment away from the first segment extends along the second direction toward the battery cell and is connected to the third segment. The end of the third segment away from the second segment is connected to the PCB board.

[0009] In some embodiments of this utility model, it further includes: end plates, each module having end plates on both sides along the first direction, the end plates being bonded to the nearest battery cell, the two end plates forming a first mounting groove and a second mounting groove on their opposite sides, the sidewall of the first mounting groove having a first mounting hole; BMS slave plates, multiple BMS slave plates corresponding to the module, the BMS slave plates being located in the corresponding first mounting groove and having a second mounting hole opposite to the first mounting hole, fasteners passing through the first mounting hole and the second mounting hole.

[0010] In some embodiments of this utility model, it further includes: a spring sheet, one end of which has a mating groove, the fastener passing through the mating groove, and the spring sheet being engaged between the fastener and the end plate.

[0011] In some embodiments of this utility model, the PCB board has a plug-in section bent towards the battery cell at one end along the first direction, the BMS has a plug-in groove that mates with the plug-in section at one end of the board near the PCB board, and the side wall of the first mounting groove has a plug-in hole opposite to the plug-in groove.

[0012] In some embodiments of this utility model, the modules are multiple modules arranged along a third direction, any two adjacent modules are connected in series, and the PCB boards are multiple modules corresponding one-to-one with the modules, with the first direction, the second direction and the third direction being perpendicular to each other.

[0013] In some embodiments of this utility model, the positive terminal and the negative terminal are arranged along the third direction, and the output terminals of the two modules located at both ends along the third direction are respectively the total positive terminal and the total negative terminal. The total positive terminal and the total negative terminal are located on the same side of the module along the first direction.

[0014] In some embodiments of this utility model, the output poles of any two adjacent modules are connected by a first aluminum bar, which extends along the third direction and is located between the two PCB boards corresponding to the two modules and connected to the two PCB boards respectively; and / or, the output poles of any two adjacent modules are connected by a second aluminum bar, which includes a transition section and two connecting sections. Along the first direction, the transition section is located on the side of the module away from the total positive electrode and extends along the third direction. The two connecting sections are respectively connected to the output poles of the two modules. The ends of the two connecting sections away from the output poles are bent along the second direction toward the battery cell and respectively connected to the two ends of the transition section along its length direction.

[0015] In some embodiments of this utility model, it further includes: a base plate, which is located on the side of the module away from the PCB board along the second direction and is bonded to each of the battery cells; and a cold plate, which is provided on both sides of each module along the third direction and is bonded to each of the battery cells, and the cold plate is bonded to the base plate.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a structural diagram of the battery pack according to the present invention;

[0019] Figure 2 This is a partial structural diagram of the battery pack according to the present invention, wherein the base plate is not shown;

[0020] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 yes Figure 2 A partial exploded view;

[0022] Figure 5 yes Figure 4 Enlarged view at point B in the middle;

[0023] Figure 6 yes Figure 4 Enlarged view at point C;

[0024] Figure 7 yes Figure 4 Enlarged view at point D;

[0025] Figure 8 This is a partial structural diagram of the battery pack according to the present invention, in which only the module, end plate and cold plate are shown;

[0026] Figure 9 yes Figure 8 Enlarged view at point E in the middle;

[0027] Figure 10 yes Figure 8 Another perspective on the battery pack's structure.

[0028] Figure label:

[0029] 100. Battery pack;

[0030] 1. Connectors;

[0031] 2. Module; 21. Battery cell; 211. Positive terminal; 212. Negative terminal; 213. Explosion-proof valve;

[0032] 3. PCB board; 31. Connector section;

[0033] 4. Adapter; 41. First segment; 42. Second segment; 43. Third segment;

[0034] 5. End plate; 51. First mounting slot; 511. First mounting hole; 512. Plug-in hole;

[0035] 6. BMS slave board; 61. Second mounting hole; 62. Plug slot;

[0036] 7. Fasteners;

[0037] 8. Spring sheet; 81. Mating groove;

[0038] 91. First aluminum bus; 92. Second aluminum bus; 921. Connecting section; 922. Transition section;

[0039] 10. Base plate;

[0040] 11. Cold-rolled steel plate;

[0041] 12. The third aluminum bar;

[0042] 13. The fourth aluminum bar. Detailed Implementation

[0043] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0044] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0045] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0046] The battery pack 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0047] like Figures 1-7 As shown, the battery pack 100 according to an embodiment of the present invention includes a module 2, connectors 1, and a PCB board 3. The module 2 includes a plurality of battery cells 21 stacked along a first direction. The positive terminal 211 and negative terminal 212 of each battery cell 21 are located on the same side of the battery cell 21 along a second direction, and the first and second directions are perpendicular. Multiple connectors 1 are used to connect the positive terminal 211 and negative terminal 212 of any two adjacent battery cells 21. The PCB board 3 is located on the side of the battery cell 21 along the second direction near the positive terminal 211 and is bonded to each battery cell 21. The PCB board 3 is connected to the plurality of connectors 1 respectively.

[0048] It is understandable that by connecting the positive terminal 211 and negative terminal 212 of any two adjacent cells 21 through the connector 1, multiple cells 21 are connected in series, and then connected to multiple connectors 1 through the PCB board 3, so that the PCB board 3 can collect information such as voltage or temperature of each cell 21.

[0049] Meanwhile, by positioning the positive terminal 211 and negative terminal 212 on the same side of the cell 21 along the second direction, both the connector 1 and the PCB board 3 are located on the same side of the cell 21 along the second direction. This facilitates the connection of the PCB board 3 to multiple connectors 1, simplifying the structure of the battery pack 100 and reducing assembly difficulty. Furthermore, by bonding the PCB board 3 to each cell 21, the PCB board 3 provides a fixing function for each cell 21, effectively constraining the expansion of the cell 21 and ensuring its stability during long-term use. This improves the integration of the battery pack 100, reduces its cost, and reduces the number of connection steps between the cell 21 and the PCB board 3, thus simplifying the assembly process and improving the assembly efficiency of the battery pack 100. Therefore, the PCB board 3 of this application achieves the dual function of data acquisition and constraining the expansion of the cell 21, effectively reducing the cost of the battery pack 100.

[0050] Optionally, the PCB board 3 is bonded to each battery cell 21 by thermally conductive structural adhesive.

[0051] Furthermore, such as Figure 10 As shown, the explosion-proof valve 213 and the positive terminal 211 of the battery cell 21 are located on both sides of the battery cell 21 along the second direction. With this arrangement, when a battery cell 21 experiences thermal runaway, the liquid sprayed from the explosion-proof valve 213 will not affect the positive terminal 211 and negative terminal 212 of other battery cells 21 or the PCB board 3, thereby improving the safety of the battery pack 100.

[0052] Optionally, connector 1 is an aluminum alloy.

[0053] According to the embodiment of the present invention, the battery pack 100 module 2 includes a plurality of battery cells 21 stacked along a first direction. The positive terminal 211 and negative terminal 212 of the battery cell 21 are located on the same side of the battery cell 21 along a second direction. There are a plurality of connectors 1 used to connect the positive terminal 211 and negative terminal 212 of any two adjacent battery cells 21. The connectors 1 are connected to the plurality of connectors 1 through a PCB board 3, so that the PCB board 3 can collect information such as voltage or temperature of each battery cell 21. Since the connectors 1 and the PCB board 3 are both located on the same side of the battery cell 21 along the second direction, it is convenient for the PCB board 3 to be connected to the plurality of connectors 1, simplifying the structure of the battery pack 100 and reducing the assembly difficulty. Meanwhile, the PCB board 3 is bonded to each cell 21, so that the PCB board 3 can fix each cell 21, which has a good effect on the expansion constraint of the cell 21, ensuring the stability of the cell 21 during long-term use, improving the integration of the battery pack 100, reducing the cost of the battery pack 100, and the bonding connection can reduce the connection steps between the cell 21 and the PCB board 3, thereby simplifying the assembly process and improving the assembly efficiency of the battery pack 100.

[0054] It should be noted that the first direction can be the length direction of module 2, the second direction can be the height direction of module 2, and the third direction can be the width direction of module 2.

[0055] In some embodiments of this utility model, such as Figures 4-7 As shown, multiple connectors 1 are located on both sides of the PCB board 3 along the third direction. The battery pack 100 also includes adapters 4, which are multiple adapters corresponding to the connectors 1. The adapters 4 are located on the side of the PCB board 3 away from the battery cell 21. The two ends of the adapters 4 in the length direction are connected to the connectors 1 and the PCB board 3 respectively.

[0056] It is understandable that the battery cell 21 will expand during the charging and discharging process of the battery pack 100. After the battery cell 21 expands, the positive terminal 211 and the negative terminal 212 are prone to displacement, causing the connector 1 connected to them to shift as well. By setting the adapter 4 to achieve indirect connection between the connector 1 and the PCB board 3, the pulling or peeling force generated between the connector 1 and the PCB board 3 can be reduced, which may cause the sampling circuit resistance to increase or break the circuit, thus ensuring the reliability of the PCB board 3 and the connector 1 and improving the reliability of the battery pack 100.

[0057] Optionally, adapter 4 is a nickel plate.

[0058] In some embodiments of this utility model, such as Figure 5 As shown, the adapter 4 includes a first segment 41, a second segment 42, and a third segment 43. The first segment 41 and the third segment 43 extend along a third direction. The two ends of the first segment 41 in the length direction are connected to the connector 1 and the second segment 42, respectively. The end of the second segment 42 away from the first segment 41 extends along a second direction toward the cell 21 and is connected to the third segment 43. The end of the third segment 43 away from the second segment 42 is connected to the PCB board 3. This arrangement further enhances the adapter 4's resistance to increased resistance or open circuit caused by pulling or peeling forces, thereby improving the reliability of the battery pack 100.

[0059] In some embodiments of this utility model, such as Figures 4-9 As shown, the battery pack 100 also includes end plates 5 and BMS slave plates 6. Each module 2 has end plates 5 on both sides along a first direction. The end plates 5 are bonded to the nearest cell 21. The sides of the two end plates 5 facing away from each other form a first mounting groove 51 and a second mounting groove. The sidewall of the first mounting groove 51 has a first mounting hole 511. There are multiple BMS slave plates 6 corresponding to the module 2. The BMS slave plates 6 are located in the corresponding first mounting groove 51 and have a second mounting hole 61 opposite to the first mounting hole 511. Fasteners 7 pass through the first mounting hole 511 and the second mounting hole 61.

[0060] Therefore, by bonding the two end plates 5 to the battery cell 21 that is closest to the corresponding module 2, the end plates 5 can fix the module 2 in the first direction, ensuring the stability of the battery cell 21 during long-term use, improving the integration of the battery pack 100, reducing the cost of the battery pack 100, and the bonding connection can reduce the connection steps between the battery cell 21 and the PCB board 3, thereby simplifying the assembly process and improving the assembly efficiency of the battery pack 100.

[0061] The first mounting slot 51 provides mounting space for the BMS slave board 6, effectively saving space within the battery pack 100 and reducing its size. Fasteners 7, inserted into the first mounting hole 511 and the second mounting hole 61, enable the installation and fixation of the BMS slave board 6. Furthermore, by having multiple BMS slave boards 6 located within the first mounting slot 51, they are positioned on the same side, facilitating unified disassembly, assembly, and maintenance.

[0062] In some embodiments of this utility model, such as Figure 6 As shown, the battery pack 100 also includes a spring plate 8. One end of the spring plate 8 along its length has a mating groove 81, into which a fastener 7 passes. The spring plate 8 is secured between the fastener 7 and the end plate 5. This arrangement further secures the BMS slave plate 6, improving the connection reliability of the BMS slave plate 6 and thus enhancing the overall reliability of the battery pack 100.

[0063] In some embodiments of this utility model, such as Figure 5 and Figure 6 As shown, one end of the PCB board 3 along the first direction has a plug-in section 31 that bends towards the battery cell 21 along the second direction. The end of the BMS slave board 6 near the PCB board 3 has a plug-in groove 62 that mates with the plug-in section 31. The side wall of the first mounting groove 51 has a plug-in hole 512 opposite to the plug-in groove 62. Thus, by inserting the plug-in section 31 through the plug-in hole 512 into the plug-in groove 62, a quick-release connection is achieved between the PCB board 3, the BMS slave board 6, and the end board 5, ensuring the reliability of the connection between the PCB board 3, the BMS slave board 6, and the end board 5, further ensuring the stability of the battery cell 21 during long-term use, and effectively saving space within the battery pack 100 and reducing the size of the battery pack 100.

[0064] In some embodiments of this utility model, such as Figure 1 , Figure 2 and Figure 4As shown, multiple modules 2 are arranged along a third direction, with any two adjacent modules 2 connected in series. Multiple PCB boards 3 correspond one-to-one with each module 2, and are perpendicular to each other in the first, second, and third directions. Thus, the capacity of the battery pack 100 is increased by using multiple modules 2, and the stability of the modules 2 during long-term use is further ensured by bonding multiple PCB boards 3 to each cell 21 of the corresponding module 2, thereby improving the reliability of the battery pack 100.

[0065] In some embodiments of this utility model, such as Figure 1 , Figure 8 and Figure 9 As shown, the positive terminal 211 and the negative terminal 212 are arranged along a third direction. The output terminals of the two modules 2 located at both ends along the third direction serve as the total positive and total negative terminals, respectively. The total positive and total negative terminals are located on the same side of the module 2 along the first direction. This arrangement allows the total positive and total negative terminals of multiple modules 2 to be led out from the same side, making the overall structure of the battery pack 100 more compact, facilitating wiring, effectively reducing the complexity of the internal structure of the battery pack 100 and the required connecting components, thereby simplifying the production and assembly process and reducing the cost of the battery pack 100.

[0066] Furthermore, the battery pack 100 also includes a third aluminum bar 12 and a fourth aluminum bar 13, wherein one end of the third aluminum bar 12 in the length direction is connected to the overall positive electrode, and one end of the fourth aluminum bar 13 in the length direction is connected to the overall negative electrode.

[0067] In some embodiments of this utility model, such as Figure 7 As shown, the output terminals of any two adjacent modules 2 are connected via a first aluminum bar 91. The first aluminum bar 91 extends along a third direction and is located between the two PCB boards 3 corresponding to the two modules 2, and is connected to both PCB boards 3 respectively. Thus, any two adjacent modules 2 can be connected in series via the first aluminum bar 91. Simultaneously, the connection of the first aluminum bar 91 to the two PCB boards 3 allows for the connection of multiple PCB boards 3, thereby better constraining the multiple modules 2, further ensuring the stability of the modules 2 during long-term use, and improving the reliability of the battery pack 100.

[0068] Furthermore, the first aluminum bar 91 is connected to the PCB board 3 via the adapter 4, thereby ensuring a reliable connection between the first aluminum bar 91 and the PCB board 3.

[0069] In some embodiments, the number of cells 21 in each module 2 is odd, and the output poles of any two adjacent modules 2 are connected by a first aluminum bar 91, and any two adjacent first aluminum bars 91 are located at the two ends of the module 2 along the first direction.

[0070] In some embodiments of this utility model, such as Figure 2 and Figure 3As shown, the output poles of any two adjacent modules 2 are connected by a second aluminum bar 92. The second aluminum bar 92 includes a transition section 922 and two connecting sections 921. Along the first direction, the transition section 922 is located on the side of the module 2 away from the total positive pole and extends along the third direction. The two connecting sections 921 are respectively connected to the output poles of the two modules 2. The ends of the two connecting sections 921 away from the output poles are bent along the second direction toward the cell 21 and respectively connected to the two ends of the transition section 922 in the length direction.

[0071] Therefore, the second aluminum bar 92 enables any two adjacent modules 2 to be connected in series. Simultaneously, the second aluminum bar 92 connects to two PCB boards 3, allowing multiple PCB boards 3 to be connected, thus better constraining multiple modules 2 and further ensuring the stability of modules 2 during long-term use, improving the reliability of the battery pack 100. Furthermore, the transition section 922 is located on the side of the module 2 furthest from the main positive terminal, thus preventing the second aluminum bar 92 from obstructing the main positive and negative terminals, facilitating disassembly and maintenance.

[0072] In some embodiments, the number of cells 21 in each module 2 is even, and the output poles of any two adjacent modules 2 are connected in sequence through a first aluminum bar 91 and a second aluminum bar 92, with the first aluminum bar 91 and the second aluminum bar 92 located at the two ends of the module 2 along the first direction, respectively.

[0073] Furthermore, the battery pack 100 also includes end plates 5. Each module 2 has end plates 5 on both sides along the first direction. The end plates 5 are bonded to the nearest battery cell 21. The sides of the two end plates 5 facing away from each other form a first mounting groove 51 and a second mounting groove. At least a portion of the transition section 922 is located in the second mounting groove. Thus, the second mounting groove provides some protection for the transition section 922, improving reliability. At the same time, with the BMS slave board 6 located in the first mounting groove 51 and the transition section 922 located in the second mounting groove, the transition section 922 avoids obstructing the BMS slave board 6, facilitating disassembly, assembly, and maintenance.

[0074] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the battery pack 100 also includes a base plate 10 and a cold plate 11. In the second direction, the base plate 10 is located on the side of the module 2 away from the PCB board 3 and is bonded to each cell 21. Each module 2 has a cold plate 11 on both sides in the third direction and is bonded to each cell 21. The cold plate 11 is bonded to the base plate 10.

[0075] It is understandable that by bonding the cold plate 11 to the base plate 10 and the PCB board 3, bonding the base plate 10 to each cell 21, and bonding the PCB board 3 to each cell 21 of the corresponding module 2, each cell 21 can be better fixed, the expansion constraint effect of the cell 21 is better, the stability of the cell 21 during long-term use is ensured, the integration of the battery pack 100 is improved, the cost of the battery pack 100 is reduced, and the bonding connection can reduce the connection steps between the cell 21 and the base plate 10 and the cold plate 11, as well as between the cold plate 11 and the base plate 10, thereby simplifying the assembly process and improving the assembly efficiency of the battery pack 100.

[0076] The following is for reference. Figures 1-10 The following detailed description of the battery pack 100 according to specific embodiments of the present invention is intended to illustrate the invention in a illustrative manner and should not be construed as limiting the invention.

[0077] The battery pack 100 includes a module 2, a connector 1, a PCB board 3, an end board 5, a base plate 10, and a cold plate 11. The module 2 includes multiple battery cells 21 stacked along a first direction. The positive terminal 211 and negative terminal 212 of the battery cells 21 are located on the same side of the battery cells 21 along a second direction. The first direction and the second direction are perpendicular. There are multiple connectors 1 used to connect the positive terminal 211 and negative terminal 212 of any two adjacent battery cells 21. The PCB board 3 is located on the side of the battery cells 21 along the second direction near the positive terminal 211 and is bonded to each battery cell 21. The PCB board 3 is connected to multiple connectors 1 respectively. Each module 2 has end plates 5 on both sides along the first direction. The end plates 5 are bonded to the nearest battery cell 21. Along the second direction, the bottom plate 10 is located on the side of the module 2 away from the PCB board 3 and is bonded to each battery cell 21. Each module 2 has cold plates 11 on both sides along the third direction and is bonded to each battery cell 21. The cold plates 11 are bonded to the bottom plate 10.

[0078] Therefore, by bonding the cold plate 11 to the base plate 10 and the PCB board 3, bonding the base plate 10 to each cell 21, bonding the PCB board 3 to each cell 21 of the corresponding module 2, and bonding the cell 21 of the two end plates 5 modules 2 that is closest to each other, each cell 21 is better fixed, the expansion constraint effect of the cell 21 is better, the stability of the cell 21 during long-term use is ensured, the integration of the battery pack 100 is improved, the cost of the battery pack 100 is reduced, and the bonding connection can reduce the connection steps between the cell 21 and the base plate 10 and the cold plate 11, as well as between the cold plate 11 and the base plate 10, thereby simplifying the assembly process and improving the assembly efficiency of the battery pack 100.

[0079] Simultaneously, the positive terminal 211 and negative terminal 212 of any two adjacent cells 21 are connected by connector 1, thereby connecting multiple cells 21 in series. These cells are then connected to multiple connectors 1 via PCB board 3, allowing PCB board 3 to collect information such as voltage or temperature from each cell 21. Furthermore, by positioning the positive terminal 211 and negative terminal 212 on the same side of the cell 21 along the second direction, both connector 1 and PCB board 3 are located on the same side of the cell 21 along the second direction. This facilitates connection of PCB board 3 to multiple connectors 1, simplifies the battery pack 100 structure, and reduces assembly difficulty.

[0080] Furthermore, the battery pack also includes a BMS slave board 6. Two end boards 5 form a first mounting groove 51 and a second mounting groove on their opposite sides. The sidewall of the first mounting groove 51 has a first mounting hole 511. There are multiple BMS slave boards 6 corresponding to the module 2. The BMS slave board 6 is located in the corresponding first mounting groove 51 and has a second mounting hole 61 that is opposite to the first mounting hole 511. Fasteners 7 pass through the first mounting hole 511 and the second mounting hole 61. One end of the PCB board 3 along the first direction has a plug-in section 31 that is bent towards the cell 21 along the second direction. The end of the BMS slave board 6 near the PCB board 3 has a plug-in groove 62 that mates with the plug-in section 31. The sidewall of the first mounting groove 51 has a plug-in hole 512 that is opposite to the plug-in groove 62.

[0081] Therefore, the first mounting slot 51 provides mounting space for the BMS slave board 6, effectively saving internal space in the battery pack 100 and reducing its volume. Fasteners 7, inserted into the first mounting hole 511 and the second mounting hole 61, enable the installation and fixation of the BMS slave board 6. Simultaneously, the plug-in segment 31, passing through the plug-in hole 512 and inserted into the plug-in slot 62, enables a quick-release connection between the PCB board 3, the BMS slave board 6, and the end board 5, ensuring reliable connections between them. This further guarantees the stability of the battery cell 21 during long-term use and effectively saves internal space in the battery pack 100, reducing its volume.

[0082] The battery pack 100 and its operation according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0083] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0084] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that, include: A module comprising a plurality of battery cells stacked along a first direction, wherein the positive and negative terminals of the battery cells are located on the same side of the battery cells along a second direction, wherein the first direction and the second direction are perpendicular. A connector, wherein there are multiple connectors and the connectors are used to connect the positive terminal and the negative terminal of any two adjacent battery cells; A PCB board is located on the side of the battery cell close to the positive electrode post along the second direction and is bonded to each of the battery cells. The PCB board is connected to a plurality of the connectors respectively.

2. The battery pack according to claim 1, characterized in that, The plurality of connectors are located on both sides of the PCB board along a third direction, and further include: The adapter is a plurality of adapters that correspond one-to-one with the connector. The adapter is located on the side of the PCB board away from the battery cell, and the two ends of the adapter along its length are respectively connected to the connector and the PCB board.

3. The battery pack according to claim 2, characterized in that, The adapter includes a first segment, a second segment, and a third segment. The first segment and the third segment extend along the third direction. The two ends of the first segment along its length are respectively connected to the connector and the second segment. The end of the second segment away from the first segment extends along the second direction toward the battery cell and is connected to the third segment. The end of the third segment away from the second segment is connected to the PCB board.

4. The battery pack according to claim 1, characterized in that, Also includes: Each module has an end plate on both sides along the first direction. The end plate is bonded to the nearest battery cell. The two end plates form a first mounting groove and a second mounting groove on the side opposite to each other. The sidewall of the first mounting groove has a first mounting hole. BMS slave boards, which are multiple BMS slave boards corresponding to the module, are located in the corresponding first mounting slot and have a second mounting hole that is opposite to the first mounting hole. Fasteners are inserted into the first mounting hole and the second mounting hole.

5. The battery pack according to claim 4, characterized in that, Also includes: A spring sheet has a mating groove at one end along its length. The fastener passes through the mating groove, and the spring sheet is engaged between the fastener and the end plate.

6. The battery pack according to claim 4, characterized in that, The PCB board has a plug-in section bent towards the battery cell in the second direction at one end along the first direction, and the BMS has a plug-in groove that mates with the plug-in section at one end of the board near the PCB board. The side wall of the first mounting groove has a plug-in hole opposite to the plug-in groove.

7. The battery pack according to claim 1, characterized in that, The modules are multiple units arranged along a third direction, and any two adjacent modules are connected in series. The PCB boards are multiple units that correspond one-to-one with the modules, and the first direction, the second direction, and the third direction are perpendicular to each other.

8. The battery pack according to claim 7, characterized in that, The positive and negative terminals are arranged along the third direction, and the output terminals of the two modules located at both ends along the third direction serve as the total positive and total negative terminals, respectively. The total positive and total negative terminals are located on the same side of the module along the first direction.

9. The battery pack according to claim 8, characterized in that, The output terminals of any two adjacent modules are connected by a first aluminum bar. The first aluminum bar extends along the third direction and is located between the two PCBs corresponding to the two modules and is connected to the two PCBs respectively. And / or, the output poles of any two adjacent modules are connected by a second aluminum bar, the second aluminum bar including a transition section and two connecting sections. Along the first direction, the transition section is located on the side of the module away from the total positive electrode and extends along the third direction. The two connecting sections are respectively connected to the output poles of the two modules. The ends of the two connecting sections away from the output poles are bent along the second direction toward the battery cell and respectively connected to the two ends of the transition section along its length.

10. The battery pack according to claim 1, characterized in that, Also includes: A base plate, along the second direction, is located on the side of the module away from the PCB board and is bonded to each of the battery cells; The cold plate is provided on both sides of each module along a third direction and is bonded to each of the battery cells. The cold plate is bonded to the base plate.

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