Electrical connection device and battery module thereof

Abstract

The utility model provides a kind of electric connection device and battery module thereof, include multiple support frame and corresponding multiple conductive sheet, conductive sheet can be installed in the corresponding accommodation groove on support frame, and by the clamping structure on support frame, it can be directly buckled and fixed each other, and the conductive handle of battery core can be sequentially clamped between heat-conducting sheet and support frame, and sequentially welded and fixed, eliminate the problem that battery module structure in prior art is derived easily welded short circuit and cannot be changed in series and parallel quantity at will due to battery density, greatly improve the safety and convenience of assembly.

Description

Technical Field

[0001] This utility model relates to a connection device, and more particularly to an electrical connection device and battery module for sequentially fixing battery cells in a stacking manner. Background Technology

[0002] In response to the booming development of the new energy vehicle market, power batteries, as one of the three core technologies of new energy electric vehicles, are considered to be a very important part of the structural protection design and thermal management planning of power batteries. At the same time, in order to improve the range of new energy electric vehicles, the need for lightweighting and increasing energy density is an inevitable trend.

[0003] The common series connection method involves stacking battery cells, then using supports on both sides to allow the protruding conductive stems of the battery cells to pass through corresponding slots and bend. Laser welding is then used to weld the conductive stems to the conductive busbars of the supports. However, with the increasing demand for energy density and lightweight design, the thickness of battery cells has also decreased. The welding process has limitations and cannot be adjusted indefinitely to accommodate the thickness of the battery cells. The spacing of the slots in the supports still needs to be at a certain height to allow for laser welding to the conductive stems. This significantly restricts the configuration of battery cells, consequently preventing further increases in overall energy density.

[0004] In addition, since the aforementioned method involves simultaneously passing the conductive handle on one side of the battery cell through the corresponding slot on the bracket, and the conductive handle on the other side of the battery cell through the corresponding slot on another bracket for assembly, the conductive handles will droop due to gravity after passing through the slots, increasing the risk of short circuit due to mutual contact. After the conductive handles are bent and attached to the bracket, they are then welded to the conductive bus in the direction of the bending of the conductive handles. The simultaneous passing and assembly method is quite inconvenient, resulting in the inability to improve the overall process efficiency.

[0005] To address this issue, the applicant proposed a design similar to Taiwan Patent Application No. 112211125, which uses two fixed frames to form a sliding cavity, along with multiple support frames that can move within the sliding cavity and conductive plates on the support frames. Multiple stacked battery cells are held in place by conductive handles clamped between adjacent support frames and conductive plates. These conductive handles are welded to the conductive plates, allowing for assembly of the battery cells in a sliding manner. However, this design limits the overall module height to the height of the fixed frames, making it impossible to arbitrarily change the number of battery cells connected in series or parallel. Furthermore, the total positive and negative output terminals of the battery module are also limited by the design of the fixed frames, resulting in a lack of flexibility in application.

[0006] In view of the deficiencies in the prior art, this utility model proposes an electrical connection device to effectively solve the above problems. Utility Model Content

[0007] The main objective of this invention is to provide an electrical connection device and its battery module. The device employs a stacking method, sequentially stacking battery cells and support frames layer by layer. Simultaneously, the conductive handles on both sides of the battery cells can be directly welded to conductive sheets. This effectively solves the short-circuit risk caused by stacking and bending the conductive handles in existing technologies, as well as the problems of limited module height or battery cell thickness. It also improves the safety and convenience of assembly. Furthermore, the stacking method allows for adjustment of the number of series and parallel connections and the placement of electrical connection terminals as needed, significantly enhancing the flexibility of use.

[0008] This utility model proposes an electrical connection device for multiple stacked battery cells, each battery cell having a conductive handle at both ends. The electrical connection device includes:

[0009] Multiple support frames, the bottom and top surfaces of which have a locking structure for adjacent support frames to be stacked and fixed together, and the top surface of each support frame has a receiving groove; and multiple conductive sheets, corresponding to and installed in the receiving groove of each of the support frames, and for electrically connecting the conductive handles of the battery cells.

[0010] Preferably, each of the support frames has a first fixing hole, and the support frames can be fixed by passing a first fixing member through the first fixing hole.

[0011] Preferably, the support frames have at least one second fixing hole, and the conductive sheets have at least one first through hole corresponding to the at least one second fixing hole. The conductive sheets are fixed to the support frames by passing through the first through holes of the conductive sheets and the second fixing holes of the support frames by a plurality of second fasteners.

[0012] Preferably, each conductive sheet includes a body connection portion and a side edge connection portion, the side edge connection portion being located at a corner of the body connection portion, the body connection portion and the side edge connection portion being electrically connected and perpendicular to each other.

[0013] Preferably, the main body connection is sandwiched between the two support frames to allow the conductive handles of the battery cells to be electrically connected.

[0014] Preferably, the conductive stem of the battery cells is welded to the body connection portion to form an electrical connection.

[0015] Preferably, each conductive sheet has at least one positioning portion on its body connection portion, and the conductive handle is welded between the positioning portion and the side edge connection portion.

[0016] Preferably, the side edge connection portion has a front side and a rear side, the front side and the rear side are disposed opposite to each other, the front side is away from the battery cell and the rear side is adjacent to the battery cell, the front side has a port, and the receiving groove of the support frame has a front notch, the front notch is disposed on the side of the receiving groove away from the battery cell, so that the port can be exposed to the support frames through the front notch after the support frames are stacked.

[0017] Preferably, it also includes a top cover that is fixed to the uppermost support frame.

[0018] Preferably, the top cover has at least one top cover fixing hole, and the support frame has at least one third fixing hole corresponding to the at least one top cover fixing hole. The top cover corresponding to the uppermost support frame is fixed by passing a third fastener through the top cover fixing hole of the top cover and the third fixing hole of the support frame.

[0019] Preferably, the conductive sheets corresponding to the uppermost and lowermost support frames extend outward to form an electrical connection end.

[0020] Preferably, the electrical connection terminals of the uppermost and lowermost support frame are located on the same side.

[0021] Preferably, the electrical connection terminals of the uppermost and lowermost support frame are located on opposite sides.

[0022] Preferably, the locking structure includes at least one male locking member located on the top surface of the support frame and at least one female locking member located on the bottom surface of the support frame and corresponding to the male locking member, so that the adjacent support frames are stacked and fixed together by the male locking member and the female locking member.

[0023] This utility model also provides a battery module, comprising:

[0024] Multiple battery cells, each battery cell having a conductive handle at each end; and

[0025] An electrical connection device for securing multiple battery cells, the electrical connection device comprising:

[0026] Multiple support frames, each having a locking structure on its bottom and top surfaces for stacking and securing adjacent support frames together, and each support frame having a receiving groove on its top surface; and

[0027] Multiple conductive sheets are corresponding to and installed in the receiving slots of each of the support frames, and are electrically connected to the conductive handles of the battery cells.

[0028] The support frames, conductive sheets, and conductive handles of the battery cells are stacked sequentially, and the corresponding conductive sheets are used to form an electrical connection with the conductive handles. Attached Figure Description

[0029] Figure 1 This is an exploded view of the electrical connection device of this utility model.

[0030] Figures 2A-2B This is a schematic diagram of the support frame for the electrical connection device of this utility model.

[0031] Figures 3-4 This is a schematic diagram of the assembly of the support frame and battery cell of the electrical connection device of this utility model.

[0032] Figure 5 This is a schematic diagram of the electrical connection device of this utility model applied to a battery module.

[0033] Figure 6A , 6B This is a schematic diagram illustrating a variation of the electrical connection device of this utility model applied to the electrical output terminal of a battery module.

[0034] Figure Labels

[0035] 10 Electrical connection devices

[0036] Electrical connection terminals 101 and 102

[0037] 20 support frames

[0038] 21 Receiving slot

[0039] 211 Second fixing hole

[0040] 212 Front notch

[0041] 22 First fixing hole

[0042] 23 First fastener

[0043] 24 Third fixing hole

[0044] 30 conductive sheet

[0045] 31 Body connection part

[0046] 311 First Through Hole

[0047] 32 Side edge connection

[0048] Port 321

[0049] 33 Positioning Department

[0050] 35 Second fastener

[0051] 40-clamping structure

[0052] 401 Public Card Combination

[0053] 402 Mother Card Assembly

[0054] 50 Top Cover

[0055] 51 Top cover fixing holes

[0056] 52 Third fastener

[0057] 60 Top shell

[0058] 70 battery cells

[0059] 71 Conductive handle Detailed Implementation

[0060] To make the advantages, spirit, and features of this utility model more readily apparent, detailed descriptions and discussions will follow with reference to the embodiments and accompanying drawings. It should be noted that these embodiments are merely representative examples of this utility model and are not intended to limit the scope of implementation or protection of this utility model. The purpose of providing these embodiments is solely to make the disclosure of this utility model more thorough and easier to understand.

[0061] The terminology used in the various embodiments disclosed herein is for the purpose of describing particular embodiments only and is not intended to limit the various embodiments disclosed herein. Unless explicitly indicated otherwise, the singular forms used also include the plural forms. Unless otherwise specified, all terms used in this specification (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments disclosed herein pertain. The foregoing terms (such as those defined in a general dictionary) are to be interpreted as having the same meaning as in the context of the same technical field and are not to be interpreted as having an idealized or overly formal meaning unless explicitly defined in the various embodiments disclosed herein.

[0062] In the description of this specification, references to terms such as "an embodiment," "a specific embodiment," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment is included in at least one embodiment of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments.

[0063] In the description of this utility model, unless otherwise specified or limited, it should be noted that the terms "coupled", "connected", and "set" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components. They can be directly connected or connected through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0064] Please see Figure 1 , 2A ~2B, the electrical connection device 10 disclosed in this utility model mainly has multiple support frames 20 and multiple conductive sheets 30. Adjacent support frames 20 have corresponding engaging structures 40 for stacking and fixing each other. Each support frame 20 has a receiving groove 21 on its top surface. Conductive sheets 30 are corresponding to and installed in the receiving groove 21 of each support frame 20. In terms of electrical function, the conductive sheets 30 are similar to the conductive bus described in the prior art. However, the conductive sheets 30 of this utility model are not structurally the same as the conductive bus of the prior art, thus avoiding the problems caused by the conductive bus of the prior art. The engaging structure 40 mainly provides positioning for the vertical stacking of support frames 20 and limiting its horizontal movement. Therefore, the engaging structure 40 can be configured by setting a male engaging member 401 diagonally on the top surface of the support frame 20, and setting a female engaging member 402 on the bottom surface of another support frame 20 at the position corresponding to the male engaging member 401, so that the adjacent stacked support frames 20 can be stacked after being engaged by the male engaging member 401 and the female engaging member 402. However, the number of male and female fasteners 401 and 402 can be increased or decreased as needed. In the vertical direction, a first fastener 23 passes through and fixes all the support frames 20 by utilizing the multiple first fixing holes 22 on the support frame 20. Furthermore, the engaging structure 40 can be easily modified, as long as it can align, position, engage, and tenon the support frames 20 vertically; it is not limited to any particular form.

[0065] Please refer to the following section. Figures 2A-2BThe support frame 20 has a receiving groove 21 on its top surface, which matches the corresponding conductive sheet 30. The conductive sheet 30 can be received and fixed in this receiving groove 21. The conductive sheet 30 has a body connecting portion 31 and a side edge connecting portion 32. The body connecting portion 31 and the side edge connecting portion 32 are perpendicular to each other and electrically connected (for example, by means of an integral molding design or by means of welding the body connecting portion 31 and the side edge connecting portion 32 to achieve electrical contact). The length of the body connecting portion 31 is approximately equal to that of the receiving groove 21. The length of the main body connection portion 31 is provided within the receiving groove 21, while the side edge connection portion 32 extends from one side of the main body connection portion 31, protruding upwards and downwards in the Z-axis direction. Simultaneously, the side edge connection portion 32 is located at a corner of the main body connection portion 31. The positions of the side edge connection portions 32 of the two adjacent conductive sheets 30 corresponding to the two adjacent support frames 20 are staggered, as shown in the figure, with one side edge connection portion 32 located on the left and the other on the right, facilitating connection or fixation and preventing short circuits. Furthermore, to ensure that the side edge connection portions 32 of the conductive sheets 30 are exposed after stacking the support frames 20, a rectangular front notch 212 is provided in the receiving groove 21 on the support frame 20 at the position where the side edge connection portions 32 of the conductive sheets 30 are placed, on the side away from the battery cell 70, to expose the side edge connection portions 32 of the conductive sheets 30. That is, one end of the receiving groove 21 is provided with a rectangular notch on the front side of the support frame 20 to expose the side edge connection portion 32. The extension height of the upper and lower protrusions of the side edge connection portion 32 provides sufficient installation area for the port 321. In other words, the side edge connection portion 32 has a front side and a rear side, which are arranged opposite to each other, with the front side away from the battery cell and the rear side adjacent to the battery cell. The front side of the side edge connection portion 32 has a certain area for the port 321 to be installed. In addition, the positioning portion 33, located away from the side edge connection portion 32, is higher than other parts of the main body connection portion 31. The space between the positioning portion 33 and the side edge connection portion 32 is for accommodating the conductive handle 71 (see Figure 3 The space is such that the front notch 212 is positioned to correspond to the side edge connection 32 being located on the left or right side of the conductive sheet 30, so that the front notch 212 is positioned opposite to the left or right end of the receiving groove 21 (e.g., Figure 2A (as shown in the image).

[0066] Therefore, please refer to the following during assembly: Figure 1 , 2A The conductive sheet 30 is installed through the first through holes 311 on both sides of its body connecting part 31, and is fitted with the corresponding second fixing holes 211 in the receiving groove 21. The second fixing member 35 (such as a screw) passes through the first through hole 311 of the conductive sheet 30 and the second fixing hole of the receiving groove 21 to fix it in the receiving groove 21 of the corresponding support frame 20 (of course, the conductive sheet 30 and the support frame 20 can also be bonded with adhesive).

[0067] When this invention is applied to a battery module, multiple battery cells 70 are fixed and electrically connected via an electrical connection device 10. The support frame 20, conductive sheet 30, and conductive handle 71 of the battery cell 70 are sequentially stacked, and the corresponding conductive sheet 30 is electrically connected to the conductive handle 71. This embodiment uses a series connection as an example; please refer to the accompanying documentation. Figures 1-4 First, the conductive sheet 30 is accommodated and fixed in the accommodating groove 21 of the corresponding support frame 20. Then, a second fixing member 35 (e.g., a screw) passes through the first through holes 311 on both sides of the body connecting portion 31 of the conductive sheet 30 to fix it in the corresponding second fixing hole 211 within the accommodating groove 21. Next, the conductive handle 71 of the stacked two battery cells 70 (the first battery cell and the second battery cell) is inserted into the body connecting portion 31 of the corresponding conductive sheet 30. Each battery cell 70 has a conductive handle 71 with different polarities at both ends; and the two conductive handles 71 on the same side of the stacked two battery cells 70 have opposite polarities (e.g., respectively). (Positive and negative electrodes), because the conductive sheet 30 is mounted above the support frame 20, the two conductive handles 71 on the same side can be directly welded from above to the body connecting part 31 of the conductive sheet 30 in a vertical direction (i.e., the Z-axis direction), fixing the two conductive handles 71 to the conductive sheet 30 of the support frame 20 (at this time, the conductive handles 71 do not need to be bent) to form an electrical connection (series connection); and the body connecting part 31 of the conductive sheet 30 can have a protruding positioning part 33 at the other end relative to the side edge connecting part 32, for welding the conductive handles 71 between the positioning part 33 and the side edge connecting part 32, that is, for welding and positioning the conductive handles 71. The receiving groove 21 on the support frame 20 is provided with a rectangular opening (e.g., on the rear side of the support frame 20 (i.e., the side near the battery cell 70)). Figure 2A As shown in the figure, the width of the opening is equal to or greater than the length of the conductive handle 71. The opening allows the conductive handle 71 to extend into the receiving groove 21 and be welded to the body connection portion 31 of the conductive sheet 30.

[0068] On the other side of the battery cell 70, another battery cell 70 (the third battery cell) is stacked on top. At this time, the two conductive handles 71 on the same side of the second and third battery cells have different polarities. Similarly, the two conductive handles 71 are welded vertically from above to the body connection portion 31 of the conductive sheet 30 located on the support frame 20. The upper support frame 20 is then stacked onto the lower support frame 20 through the snap-fit ​​structure 40. In this way, the support frame 20 together with the conductive sheet 30 fixed thereon are stacked, and then another set of battery cells 70 can be installed. The two ends are welded alternately to complete the series connection of the battery cells 70. Since the conductive handles 71 and conductive plates 30 are welded vertically from above to form an electrical connection, the conductive handles 71 of the previously installed support frame 20 are located below the other support frame 20. Because the support frame 20 is made of insulating material, it will not interfere with the conductive handles 71 that are to be welded to the support frame 20 at this time, thus avoiding short circuit problems. Then, the support frame 20 (along with the conductive plates 30 fixed on it) and the conductive handles 71 of the battery cells 70 are installed and welded one after another in sequence; finally, the top cover 50 is installed. Please refer to [link to relevant documentation]. Figure 1 Unlike other support frames, in addition to using a second fixing member 35 (such as a screw) to pass through the first through holes 311 on both sides of the main body connecting portion 31 of the conductive sheet 30 to fix it to the corresponding second fixing hole 211 in the receiving groove 21, the uppermost support frame 20 also has a third fixing hole 24 on both sides of the second fixing hole 211. The third fixing member 52 can pass through the top cover fixing hole 51 on the top cover 50 to fix the top cover 50 to the corresponding third fixing hole 24 in the receiving groove 21 of the uppermost support frame 20, thus fixing it together with the uppermost support frame 20. The top cover 50 has an insulating function. After completion, it can be protected by a top shell 60 on top, or by adding a shell on the bottom and sides to protect the overall battery structure (not shown in the figure), thus completing the battery module assembled using the electrical connection device of this utility model. Figure 5 As shown. It should be noted that the above description uses the series connection of battery cells 70 as an example. Based on the same principle, battery cells 70 can also be connected in parallel or in a combination of series and parallel connections.

[0069] Heat dissipation material, such as metal sheets (e.g., aluminum), can be placed between the battery cells 70 to improve heat dissipation after stacking. Alternatively, buffer material can be added between the battery cells 70 to increase the overall battery module's ability to withstand external impacts. After assembly, because the receiving slot 21 of the support frame 20 has a rectangular front notch 212, the side edge connection 32 will be exposed after the support frame 20 is stacked. Figure 5As shown, the conductive handle 71 is exposed on the front and rear sides of the electrical connection device 10, and the side edge connection of the conductive plate 30 is electrically connected. Therefore, it is very easy to use the port 321 on the side edge connection 32 to connect external wires (not shown in the figure), and various electrical characteristics (including resistance, voltage, etc.) of the corresponding single battery cell 70 can be detected. In other words, it can be used as the connection point of the monitoring and management module of the battery module to monitor the electrical characteristic status of each battery cell 70 in real time.

[0070] Please refer to the following for further details. Figures 4-5 The conductive plates 30 corresponding to the uppermost and lowermost support frames 20 extend outward to form electrical connection terminals 101 and 102, respectively, serving as the power output terminals (total positive and total negative terminals) of the battery module. Since the electrical connection terminals 101 and 102 extend directly from the conductive plates 30, and the conductive plates 30 are only installed within the receiving grooves 21 of the support frame 20, for different numbers of battery cells 70 connected in series or parallel, simply changing the position of the uppermost and / or lowermost conductive plates 30 will adjust the electrical connection terminals 101 and 102 to be on the same side (see...). Figure 6A ) or opposite sides (see Figure 6B It is very flexible in application.

[0071] In summary, this utility model proposes an electrical connection device that directly stacks and installs battery cells and support frames together with conductive plates on them. Assembly and welding can be performed vertically from above, simultaneously at both ends of the battery cells. Therefore, it solves the problem of short circuits easily occurring when battery cells are stacked in series in existing technologies. Furthermore, because of the vertical sequential installation and welding method, not only is it unnecessary to bend the conductive handles for welding, but adjacent battery cells also do not interfere with each other during welding and assembly, thus improving assembly safety and convenience. In addition, the direct stacking method using support frames eliminates the need for the sliding rail design of existing fixed frames, allowing the number of battery cells stacked to be adjusted freely according to requirements, regardless of the height of the fixed frame. Furthermore, eliminating the fixed frame further improves assembly efficiency and reduces the number of parts.

[0072] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. The scope of protection of this utility model is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this utility model within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this utility model. Therefore, the scope of protection of this utility model shall be determined by the scope defined in the claims.

Claims

1. An electrical connection device, characterized in that, For multiple stacked battery cells, each battery cell has a conductive handle at each end, and the electrical connection device includes: Multiple support frames, each having a locking structure on its bottom and top surfaces for stacking and securing adjacent support frames together, and each support frame having a receiving groove on its top surface; and Multiple conductive plates are corresponding to and installed in the receiving slots of each of the support frames, and are electrically connected to the conductive handles of the battery cells.

2. The electrical connection device according to claim 1, characterized in that, Each of the support frames has a first fixing hole, and the support frames can be fixed by passing a first fastener through the first fixing hole.

3. The electrical connection device according to claim 1, characterized in that, The support frames have at least one second fixing hole, and the conductive sheets have at least one first through hole corresponding to the at least one second fixing hole. The conductive sheets are fixed to the support frames by a plurality of second fasteners passing through the first through holes of the conductive sheets and the second fixing holes of the support frames.

4. The electrical connection device according to claim 1, characterized in that, Each conductive sheet includes a body connection portion and a side edge connection portion, the side edge connection portion being located at a corner of the body connection portion, the body connection portion and the side edge connection portion being electrically connected and perpendicular to each other.

5. The electrical connection device according to claim 4, characterized in that, The main body connection is sandwiched between the two support frames to allow the conductive handles of the battery cells to be electrically connected.

6. The electrical connection device according to claim 5, characterized in that, The conductive stem of these battery cells is welded to the body connection portion to form an electrical connection.

7. The electrical connection device according to claim 6, characterized in that, Each conductive sheet has at least one positioning portion on its body connection portion, and the conductive handle is welded between the positioning portion and the side edge connection portion.

8. The electrical connection device according to claim 4, characterized in that, The side edge connection has a front side and a rear side, which are disposed opposite to each other. The front side is away from the battery cell and the rear side is adjacent to the battery cell. The front side has a port. The receiving groove of the support frame has a front notch. The front notch is disposed on the side of the receiving groove away from the battery cell, so that the port can be exposed to the support frames through the front notch after the support frames are stacked.

9. The electrical connection device according to claim 1, characterized in that, It also includes a top cover, which is fixed to the uppermost support frame.

10. The electrical connection device according to claim 9, characterized in that, The top cover has at least one top cover fixing hole, and the support frame has at least one third fixing hole corresponding to the at least one top cover fixing hole. The top cover corresponding to the uppermost support frame is fixed by passing a third fastener through the top cover fixing hole of the top cover and the third fixing hole of the support frame.

11. The electrical connection device according to claim 1, characterized in that, The conductive sheets corresponding to the uppermost and lowermost support frames extend outward to form an electrical connection terminal.

12. The electrical connection device according to claim 11, characterized in that, The electrical connection terminals of the uppermost and lowermost support frame are located on the same side.

13. The electrical connection device according to claim 11, characterized in that, The electrical connection terminals of the uppermost and lowermost support frame are located on opposite sides.

14. The electrical connection device according to claim 1, characterized in that, The locking structure includes at least one male locking member located on the top surface of the support frame and at least one female locking member located on the bottom surface of the support frame and corresponding to the male locking member, through which the adjacent support frames are stacked and fixed to each other.

15. A battery module, characterized in that, Include: Multiple battery cells, each battery cell having a conductive handle at each end; and An electrical connection device for securing multiple battery cells, the electrical connection device comprising: Multiple support frames, each having a locking structure on its bottom and top surfaces for stacking and securing adjacent support frames together, and each support frame having a receiving groove on its top surface; and Multiple conductive sheets are corresponding to and installed in the receiving slots of each of the support frames, and are electrically connected to the conductive handles of the battery cells. The support frames, conductive sheets, and conductive handles of the battery cells are stacked sequentially, and the corresponding conductive sheets are used to form an electrical connection with the conductive handles.

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