A battery module and a battery pack

Abstract

The utility model discloses an embodiment provides a kind of battery module and battery pack, battery module includes circuit board, connector and conducting sheet;Circuit board includes mutually connected main part and folding part, battery module has first direction, first direction is the thickness direction of circuit board, folding part is folded along first direction with main part and is set;Connector is set to the surface of folding part away from main part, conducting sheet is electrically connected with main part, along first direction, the orthographic projection of connector at least partially coincides with conducting sheet.The utility model effectively utilizes the layout space on circuit board by folding circuit board, solves the problem that the arrangement between conducting sheet and connector is prone to interference, improves space utilization.In addition, it is avoided to open the connector on the end plate to place the avoiding slot, that is, to avoid reducing the structural strength of the circuit board, to further ensure that the structural strength of the battery module is not affected.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, specifically relating to a battery module and battery pack. Background Technology

[0002] As a crucial component of power batteries, battery modules typically use FPCs (Flexible Printed Circuits) and nickel strips to collect cell voltage. This information is then output to the battery management system via a low-voltage connector at the FPC's connection port to monitor battery status and prevent overcharging and over-discharging. However, due to the narrow width of the battery module's output terminal, interference can easily occur between the nickel strips and the low-voltage connector.

[0003] In related technologies, a common approach to address this issue is to create a clearance slot on the top of the module end plate, placing the low-voltage interface and connector within the slot. However, creating a slot on the end plate can easily reduce the structural strength of both the end plate and the battery module. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a battery module and battery pack that can solve the problem of interference between the nickel sheet and connector arrangement without affecting the structural strength of the battery module.

[0005] To solve the above-mentioned technical problems, this utility model is implemented as follows:

[0006] In a first aspect, the present invention provides a battery module, including a circuit board, a connector, and a conductive sheet;

[0007] The circuit board includes a main body and a folding part that are connected to each other. The battery module has a first direction, which is the thickness direction of the circuit board. The folding part and the main body are folded together along the first direction.

[0008] The connector is disposed on the surface of the folded portion opposite to the main body portion, the conductive sheet is electrically connected to the main body portion, and along the first direction, the orthographic projection of the connector at least partially coincides with the conductive sheet.

[0009] Optionally, the battery module further includes a support plate;

[0010] The support plate is connected to the surface of the folded portion opposite to the connector, and the support plate is located between the folded portion and the main body portion.

[0011] Optionally, the battery module further includes a buffer;

[0012] The buffer is connected to the surface of the support plate opposite to the folded portion, and the buffer is located between the support plate and the main body.

[0013] Optionally, the battery module further includes an end plate and battery cells;

[0014] The end plate has a first mounting groove, the circuit board is disposed in the first mounting groove, and the end plate is fixedly connected to the battery cell.

[0015] Optionally, a folding line is provided on the circuit board, the folding line being located between the folded portion and the main body portion, and the orthographic projection of the folding line along the first direction coincides with the end of the end plate.

[0016] Optionally, a fixing post is provided on the end plate;

[0017] The folding part has a first through hole, the main body part has a second through hole, and the fixing post is fixed through the first through hole and the second through hole.

[0018] Optionally, a fixing plate is provided at the end of the fixing column;

[0019] The fixed plate presses against the folded part.

[0020] Optionally, the end plate is provided with a snap-fit ​​component;

[0021] The snap-fit ​​component secures the main body and the folded portion together.

[0022] Optionally, the battery module further includes a cell connecting piece;

[0023] The end plate has a second mounting groove, the cell connecting piece is disposed in the second mounting groove, the conductive piece is electrically connected to the cell connecting piece, and the cell connecting piece is electrically connected to the cell.

[0024] Secondly, embodiments of the present invention provide a battery pack, including the battery module described in any of the above embodiments.

[0025] In the battery module provided by this embodiment, the circuit board, i.e., the FPC flexible board, includes a main body and a folded part connected to each other. The folded part and the main body are folded along a first direction, i.e., the thickness direction of the circuit board. In the folded state, the main body and the folded part are located on the same plane. During the folding process, the folded part folds towards the main body, so that one surface of the folded part gradually approaches the main body. In the final folded state, i.e., the finished product state, one surface of the folded part is attached to the main body, and a connector is provided on the other surface of the folded part. The folded part and the main body are stacked along the thickness direction of the circuit board. The connector is located on the surface of the folded part away from the main body, and at least a portion of the orthogonal projection of the connector coincides with the conductive sheet along the thickness direction of the circuit board. Since there is a folded part between the connector and the conductive sheet, the folded part supports and fixes the connector while insulating and isolating the connector and the conductive sheet. This solves the problem of interference between the arrangement of the conductive sheet (i.e., the nickel sheet) and the connector, and eliminates the need to misalign the conductive sheet and the connector, thus improving space utilization. In addition, it avoids opening clearance slots on the end plate to place the connector, ensuring that the structural strength of the battery module is not affected. Attached Figure Description

[0026] Figure 1 This is an exploded view of the battery module structure provided in this embodiment of the utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the folded part in the folded state in an embodiment of this utility model;

[0028] Figure 3 This is a structural schematic diagram of the folding part during the folding process in an embodiment of this utility model;

[0029] Figure 4 This is a schematic diagram of the structure of the folded part in the folded state in an embodiment of this utility model;

[0030] Figure 5 This is a partial structural diagram of the battery module provided in an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the battery module structure provided in an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the battery pack structure provided in an embodiment of the present invention.

[0033] Figure label:

[0034] 1-Circuit board, 11-Main body, 12-Folding part, 13-Folding line, 2-Connector, 3-Conductive sheet, 4-Support plate, 5-Buffer, 6-End plate, 61-Fixing post, 611-Fixing plate, 62-Snap-fit, 63-First mounting slot, 64-Second mounting slot, 7-Battery cell, 71-Frame, 8-Battery cell connecting piece, 9-Box. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0036] The terms "first," "second," etc., used in the specification and claims of this utility model are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this utility model can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, the first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0037] In the first embodiment, referring to Figure 1 and Figure 4 A battery module is provided, including a circuit board 1, a connector 2, and a conductive sheet 3. The circuit board 1 includes a main body 11 and a folded part 12 connected to each other. The battery module has a first direction, which is the thickness direction of the circuit board 1. The folded part 12 and the main body 11 are folded together along the first direction. The connector 2 is disposed on the surface of the folded part 12 away from the main body 11. The conductive sheet 3 is electrically connected to the main body 11. Along the first direction, the orthographic projection of the connector 2 at least partially coincides with the conductive sheet 3.

[0038] Specifically, such as Figure 1As shown, the battery module, also known as a battery assembly, includes a circuit board 1, a connector 2, and a conductive sheet 3. The circuit board 1 includes a PCB (Printed Circuit Board) or FPC; this embodiment uses an FPC, which has a certain degree of flexibility, is easy to fold, and is typically used to install low-voltage connectors. The connector 2 has relevant low-voltage interfaces, connecting the battery and the power-consuming device, providing a uniform and stable power supply, and has short-circuit and overload protection functions. The conductive sheet 3 includes copper or nickel sheets for conducting current; this embodiment uses nickel sheets. The first direction of the battery module is defined as the thickness direction Z of the circuit board 1. The circuit board 1 includes an interconnected main body 11 and a folding part 12. Figure 4 As shown, the circuit board 1 includes a main body 11 and a folded portion 12 connected to each other. The main body 11 and the folded portion 12 are folded along a first direction. The conductive sheet 3 is electrically connected to the main body 11, specifically by soldering. In the folded product, the connector 2 is disposed on the surface of the folded portion 12 opposite to the main body 11, i.e., the surface of the folded portion 12 along the positive Z direction. Along the first direction, at least a portion of the orthogonal projection of the connector 2 coincides with the conductive sheet 3. The folded portion 12 is spaced between the connector 2 and the conductive sheet 3.

[0039] like Figure 2 The structure of the folded portion 12 in its folded state is shown. The main body 11 and the folded portion 12 are located on the same plane, and the connector 2 is located on the surface of the folded portion 12 along the negative Z direction. Figure 3 The structure of the folding portion 12 during the folding process is shown. The folding portion 12 folds towards the main body portion 11, such that one surface of the folding portion gradually comes into contact with the main body portion 11. Figure 4 The structure of the folded portion 12 in its folded state is shown. One surface of the folded portion is attached to the main body 11, and the connector 2 is located on the other opposite surface of the folded portion 12. Because the folded portion 12 is spaced between the connector 2 and the conductive sheet 3, the folded portion 12 supports and fixes the connector 2 while insulating and isolating the connector 2 from the conductive sheet 3. At least a portion of the orthographic projection of the connector 2 coincides with the conductive sheet 3, effectively utilizing the layout space on the circuit board 1. The connector 2 is disposed on the circuit board 1 along the thickness direction of the circuit board 1 without affecting the structural strength of the circuit board 1.

[0040] In the battery module provided by this embodiment, the folded circuit board is stacked with the main body along the thickness direction, and the connector is placed on the surface of the folded part away from the main body. Folded parts are spaced apart from the connector and conductive sheet. This effectively utilizes the layout space on the circuit board, solving the problem of interference between the conductive sheet and the connector, eliminating the need for misalignment and improving space utilization. Furthermore, it avoids creating clearance slots on the end plate for the connector; the folded circuit board can support the connector, preventing a reduction in the structural strength of the circuit board and further ensuring that the structural strength of the battery module remains unaffected.

[0041] In the second embodiment, refer to Figure 1 and Figure 2 The battery module also includes a support plate 4; the support plate 4 is connected to the surface of the folded part 12 away from the connector 2, and the support plate 4 is located between the folded part 12 and the main body 11.

[0042] Specifically, such as Figure 2 As shown, in the folded state, the projection of the folded portion 12 along the thickness direction extends beyond the large surface of the battery cell, meaning the folded portion 12 protrudes from the outer edge of the end plate 6, allowing the connector 2 to be soldered to the folded portion 12. A support plate 4 is positioned on the surface of the folded portion 12 facing away from the connector 2. Figure 2 The connector 2 is disposed on the surface of the folded portion 12 along the negative Z-direction, and the support plate 4 is disposed on the surface of the folded portion 12 along the positive Z-direction. Since the FPC board is relatively soft and difficult to fix during welding, the support plate 4 provides a rigid support structure for welding the connector 2, thereby fixing the folded portion 12 and the connector 2 during welding and preventing the connector 2 from shaking or shifting during the welding process. Figure 3 and Figure 4 As shown, in the final folded product, the support plate 4 is located between the folded part 12 and the main body part 11, which can also improve the overall structural strength of the circuit board 1. The support plate 4 can be made of plastic material, including but not limited to ABS (Acrylonitrile Butadiene Styrene) or epoxy resin, which has certain strength, toughness and insulation.

[0043] Based on the second embodiment, referring to Figures 1 to 3 The battery module also includes a buffer 5; the buffer 5 is connected to the surface of the support plate 4 away from the folded part 12, and the buffer 5 is located between the support plate 4 and the main body 11.

[0044] Specifically, such as Figure 2As shown, in the folded state, the buffer 5 is disposed on the surface of the support plate 4 along the positive Z-direction, and the support plate 4 is disposed on the surface of the folded portion 12 along the positive Z-direction; that is, the folded portion 12, the support plate 4, and the buffer 5 are stacked along the positive Z-direction. Figure 4 As shown, in the folded state, the buffer 5 is located between the support plate 4 and the main body 11, that is, the main body 11, the buffer 5, the support plate 4, and the folded part 12 are stacked along the positive Z direction. The buffer 5 is disposed between the folded part 12 and the main body 11 of the circuit board 1. The buffer 5 is made of flexible insulating material and has good elastic modulus and strong compression resistance. It is used to alleviate the problem of excessive stress concentration, reduce the mutual wear between the folded part 12 and the main body 11 during folding, and ensure the structural integrity of the circuit board 1. The materials that can be used for the buffer 5 include rubber materials, foam materials, engineering plastics, or fiber composite materials. Among them, rubber materials include but are not limited to silicone rubber, EPDM rubber, or neoprene rubber; foam materials include but are not limited to polyurethane foam, foam, polyethylene foam, or polyamide foam; engineering plastics include but are not limited to polycarbonate, polytetrafluoroethylene, or polypropylene; and fiber composite materials include but are not limited to glass fiber reinforced plastics or aramid fiber reinforced plastics. In this embodiment, the buffer 5 can be made of die-cut insulating sheet material, including PP insulating sheet, which has insulation properties, good pressure resistance, and fire resistance.

[0045] In the third embodiment, refer to Figure 1 and Figure 6 The battery module also includes an end plate 6 and a battery cell 7; the end plate 6 has a first mounting groove 63, the circuit board 1 is disposed in the first mounting groove 63, and the end plate 6 is fixedly connected to the battery cell 7.

[0046] Specifically, such as Figure 1 and Figure 6 As shown, the end of the battery cell 7 is fixed to the end plate 6, also known as the wire harness isolation plate, which can hold related electrical wires. Multiple battery cells 7 are fixed to the same end plate 6 to form a battery cell assembly. The end plate 6 is also used to install and fix the circuit board 1, conductive sheet 3, and battery cell connecting piece 8. A first mounting groove 63 is provided on the end plate 6, and the circuit board 1 is placed within the first mounting groove 63. The side of the battery cell 7 is fixed to the frame 71, which provides support and protection for the battery cell.

[0047] This embodiment effectively utilizes the space on the circuit board by folding the circuit board, solving the problem of interference between the conductive sheets and connectors, improving space utilization, and thus increasing battery capacity. At the same time, it eliminates the need for clearance slots on the end plate to accommodate connectors, avoiding a reduction in the structural strength of the battery module.

[0048] Based on the third embodiment, referring to Figure 2A folding line 13 is provided on the circuit board 1. The folding line 13 is located between the folding part 12 and the main body part 11. Along the first direction, the orthographic projection of the folding line 13 coincides with the end of the end plate 6.

[0049] Specifically, such as Figure 2 As shown, a folding line 13 is provided on the circuit board 1. The folding line 13 is located between the folding part 12 and the main body 11, that is, the folding part 12 folds along the folding line 13 toward the main body 11. Along the first direction Z, the orthogonal projection of the folding line 13 coincides with the end of the end plate 6, that is, the folding line 13 is flush with the end of the end plate 6. Therefore, in the folded state, the folding part 12 protrudes beyond the outside of the end plate 6. Since the battery cell 7 corresponds to the end plate 6, that is, the folding part 12 extends beyond the large surface of the battery cell, facilitating soldering between the folding part 12 and the connector 2. In the final folded state, the orthogonal projection of the folding part 12 along the first direction coincides with the end plate 6, that is, the folding part 12 is located inside the end plate 6, that is, the folding part 12 is within the large surface area of ​​the battery cell. This arrangement effectively improves the space utilization of the battery module.

[0050] Based on the third embodiment, referring to Figures 2 to 4 The end plate 6 is provided with a fixing post 61; the folding part 12 has a first through hole, the main body part 11 has a second through hole, and the fixing post 61 is fixed through the first through hole and the second through hole.

[0051] Specifically, such as Figures 2 to 4 As shown, a fixing post 61 is provided on the end plate 6, a first through hole is provided on the folding part 12, a second through hole is provided on the main body 11, a third through hole is provided on the support plate 4, and a fourth through hole is provided on the buffer member 5. The first, third, and fourth through holes are coaxially arranged. The main body 11 is fixed to the fixing post 61 through the second through hole. In the folded state, along the positive Z-direction, the buffer member 5 is fixed to the fixing post 61 through the fourth through hole, the support plate 4 through the third through hole, and the folding part 12 through the first through hole. Therefore, this embodiment uses a fixing post with through holes to fix the folding part 12 and the main body 11 in the folded state, avoiding residual stress during folding that could cause the folding part 12 to deform away from the main body 11 and affect structural stability. The fixing post 61 in this embodiment can be a screw, pin, or hot-riveted post. The fixing post 61 and the end plate 6 can be integrally formed or mechanically connected separately; this embodiment does not limit this.

[0052] Based on the above-described embodiment of the fixed column 61, referring to Figure 5 The end of the fixed column 61 is provided with a fixed plate 611; the fixed plate 611 is pressed into the folded part 12.

[0053] Specifically, such as Figure 5As shown, a fixing plate 611 is provided at the end of the fixing column 61, and the outer diameter of the fixing plate 611 is larger than the outer diameter of the main body of the fixing column 61. When the fixing column 61 is a hot-riveted column, after the folding part 12 is folded and fixed to the fixing column 61 through the first through hole, the top of the fixing column 61 is flattened into the fixing plate 611 using a hot press or other stamping equipment. The fixing plate 611 presses against the folding part 12 to effectively fix the folding part 12 and prevent the folding part 12 from deforming or shifting, which would affect the structural stability.

[0054] Based on the third embodiment, referring to Figures 2 to 5 The end plate 6 is provided with a snap-fit ​​component 62; the snap-fit ​​component 62 snaps and fixes the main body 11 and the folding part 12.

[0055] Specifically, such as Figures 2 to 5 As shown, the end plate 6 is provided with a snap-fit ​​component 62, i.e., a snap-fit ​​structure, which is located near the folding line 13. The end of the snap-fit ​​component 62 is hook-shaped. Before folding, the main body 11 is snapped and fixed inside the snap-fit ​​component 62. After folding the folding part 12, the folding part 12 is snapped and fixed inside the snap-fit ​​component 62. Therefore, this embodiment adopts a snap-fit ​​connection structure to fix the folding part 12 and the main body 11 in the folded state, avoiding the residual stress existing during the folding process from causing the folding part 12 to deform in a direction away from the main body 11, thus affecting the structural stability. It should be noted that those skilled in the art can flexibly adopt at least one of the snap-fit ​​structure provided in this embodiment or the fixing column structure provided in the above embodiments according to actual needs, and there is no limitation here.

[0056] Based on the third embodiment, referring to Figure 1 The battery module also includes a cell connecting piece 8; a second mounting groove 64 is provided on the end plate 6, the cell connecting piece 8 is disposed in the second mounting groove 64, the conductive piece 3 is electrically connected to the cell connecting piece 8, and the cell connecting piece 8 is electrically connected to the cell 7.

[0057] Specifically, such as Figure 1As shown, the cell connecting piece 8, also known as the battery plate, is used to connect the cell 7 and affects the battery's internal resistance. During charging and discharging, the cell connecting piece 8 continuously adsorbs and releases active ions, forming an electrochemical reaction and expanding the conductive area of ​​the cell. The cell connecting piece 8 is electrically connected to the cell and the conductive plate 3, connecting the cell electrodes and the conductive plate 3, forming a current path between the battery and the electrical device. The cell connecting piece 8 and the conductive plate 3 can be connected by laser welding or riveting. The cell connecting piece 8 is typically made of lithium carbonate, lithium iron phosphate, or ternary materials. A second mounting groove 64 is provided on the end plate 6, and the cell connecting piece 8 is installed in the second mounting groove 64. The number of second mounting grooves 64 is the same as the number of cell connecting pieces 8. This embodiment has two rows of second mounting grooves 64, each row including multiple second mounting grooves 64, and each second mounting groove 64 contains one cell connecting piece 8.

[0058] In the fourth embodiment, a battery module assembly method is provided, the specific steps of which are as follows:

[0059] Step 1, such as Figure 1 As shown, the cell connecting pieces 8 are installed one by one in the second mounting slots 64 on the end plate 6.

[0060] Step 2: Install the circuit board 1 into the first mounting slot 63 on the end plate 6, so that the main body 11 is fixed on the fixing post 61 or the snap-fit ​​part 62, and the conductive piece 3 already connected to the circuit board 1 corresponds one-to-one with the battery cell connecting piece 8.

[0061] Step 3: Using laser welding or riveting processes, the conductive sheet 3 and the battery cell connecting piece 8 are connected one-to-one to form an electrical connection.

[0062] Step 4, as follows Figure 2 As shown, support plates 4 and buffer members 5 are stacked sequentially on the surface of the folded part 12 along the positive Z direction.

[0063] Step 5, as follows Figure 2 As shown, connector 2 is welded to the surface of fold 12 along the negative Z direction.

[0064] Step 6: Fold the folding part 12 180° toward the main body part 11 until the buffer 5, support plate 4 and folding part 12 are fixed to the fixing post 61 or the snap-fit ​​part 62 to stabilize the circuit board in the folded state.

[0065] Step 7: If the fixed column 61 is used, the top of the fixed column 61 is flattened into a fixed plate 611 by using a hot press or other stamping equipment to press and fix the folded part 12.

[0066] Therefore, this embodiment, through the above assembly method, by folding the circuit board and fixing it with fixing posts or snap-fit ​​components, effectively utilizes the layout space on the circuit board, solves the problem of easy interference between the arrangement of conductive sheets and connectors, and improves space utilization.

[0067] In the fifth embodiment, refer to Figure 7 A battery pack is also provided, including the battery module described in any of the above embodiments.

[0068] Specifically, such as Figure 7 As shown, the battery pack includes battery modules and a housing 9. There are multiple battery modules, and the number of end plates 6 corresponds to the number of battery modules. Each battery module includes an end plate 6 and multiple battery cells 7 fixed on the end plate 6. The battery modules are fixed in the receiving cavity of the housing 9, and the housing 9 plays a role in fixing and protecting the battery modules.

[0069] The battery pack using the battery module provided in the above embodiments solves the problem of interference between the conductive sheets and the connectors, improves space utilization, and helps to increase the battery pack capacity to meet the power demand for large amounts of electricity.

[0070] In a sixth embodiment, an electrical device is also provided, including the battery pack described in any of the preceding embodiments.

[0071] The aforementioned electrical equipment includes, but is not limited to, battery swapping stations or electric vehicles. By adopting the battery packs provided in the above embodiments, the space utilization rate of the battery packs is improved, which is beneficial to meeting the power demand of high-power electrical equipment.

[0072] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0073] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A battery module, characterized in that, Includes a circuit board (1), a connector (2), and a conductive sheet (3); The circuit board (1) includes a main body (11) and a folding part (12) connected to each other. The battery module has a first direction, which is the thickness direction of the circuit board (1). The folding part (12) and the main body (11) are folded together along the first direction. The connector (2) is disposed on the surface of the folded portion (12) opposite to the main body portion (11), the conductive sheet (3) is electrically connected to the main body portion (11), and along the first direction, the orthographic projection of the connector (2) at least partially coincides with the conductive sheet (3).

2. The battery module according to claim 1, characterized in that, The battery module also includes a support plate (4); The support plate (4) is connected to the surface of the folded part (12) away from the connector (2), and the support plate (4) is located between the folded part (12) and the main body (11).

3. The battery module according to claim 2, characterized in that, The battery module also includes a buffer (5); The buffer (5) is connected to the surface of the support plate (4) away from the folded part (12), and the buffer (5) is located between the support plate (4) and the main body (11).

4. The battery module according to any one of claims 1 to 3, characterized in that, The battery module also includes an end plate (6) and a battery cell (7); The end plate (6) has a first mounting groove (63), the circuit board (1) is disposed in the first mounting groove (63), and the end plate (6) is fixedly connected to the battery cell.

5. The battery module according to claim 4, characterized in that, A folding line (13) is provided on the circuit board (1). The folding line (13) is located between the folding part (12) and the main body part (11). Along the first direction, the orthographic projection of the folding line (13) coincides with the end of the end plate (6).

6. The battery module according to claim 4, characterized in that, A fixing post (61) is provided on the end plate (6); The folding part (12) has a first through hole, the main body part (11) has a second through hole, and the fixing post (61) is fixed through the first through hole and the second through hole.

7. The battery module according to claim 6, characterized in that, The end of the fixed column (61) is provided with a fixed plate (611); The fixing plate (611) presses against the folded part (12).

8. The battery module according to claim 4, characterized in that, The end plate (6) is provided with a snap-fit ​​component (62); The snap-fit ​​component (62) snaps and fixes the main body (11) and the folding part (12).

9. The battery module according to claim 4, characterized in that, The battery module also includes a cell connecting piece (8); The end plate (6) is provided with a second mounting groove (64), the battery cell connecting piece (8) is disposed in the second mounting groove (64), the conductive piece (3) is electrically connected to the battery cell connecting piece (8), and the battery cell connecting piece (8) is electrically connected to the battery cell.

10. A battery pack, characterized in that, Includes the battery module as described in any one of claims 1-9.

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