Battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack. The battery pack comprises a box body with an accommodating cavity; the battery cells are arranged in the containing cavity of the box body, the multiple battery cells are sequentially arranged in the length direction of the box body, and the battery cells are provided with tabs arranged towards the side wall of the containing cavity; the busbar assembly comprises a supporting piece, an abutting assembly, a fastening plate and a plurality of busbars, and the supporting piece is arranged between the inner wall of the box body and the battery cell; the abutting assembly is detachably connected with the supporting piece, the abutting assembly is suitable for abutting the busbar on the tab, and the fastening plate is suitable for being detachably inserted between the abutting assembly and the inner wall of the box body; the abutting assembly is provided with a plurality of grooves, and the grooves are distributed at intervals in the length direction of the abutting assembly. The busbars are installed in the grooves, and the busbars are electrically connected. The busbar abuts against the tabs, welding is not needed, disassembly and assembly are convenient, and damage to the busbar in the disassembly process is avoided.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to battery packs. Background Technology

[0002] Power batteries are key components of new energy vehicles. A battery pack consists of a casing and several battery cells within it, which are electrically connected via busbar assemblies. Current technology typically achieves high-voltage connections between cells by welding the busbars to the cell tabs. During battery pack use, individual cells may fail, requiring replacement. However, because the busbars are fixed to the cell tabs by welding, disassembly is inconvenient, necessitating destructive disassembly. The removed busbars are then damaged and cannot be reused, and may further damage other cells during disassembly, resulting in extremely high repair costs. Utility Model Content

[0003] In view of this, the present invention provides a battery pack to solve the problem of inconvenient disassembly of the busbar in the battery pack.

[0004] This utility model provides a battery pack, comprising: a housing having a receiving cavity; multiple battery cells disposed in the receiving cavity of the housing, the multiple battery cells being arranged sequentially along the length direction of the housing, each battery cell having a tab disposed facing the side wall of the receiving cavity; and a bus assembly including a support member, an abutment member, a fastening plate, and a plurality of busbars, wherein the support member is disposed between the inner wall of the housing and the battery cells; the abutment member is detachably connected to the support member, the abutment member being adapted to abut the busbars against the tabs, and the fastening plate being adapted to be detachably inserted between the abutment member and the inner wall of the housing; the abutment member having a plurality of grooves, the plurality of grooves being spaced apart along the length direction of the abutment member; and the busbars being installed in the grooves and electrically connected to each other.

[0005] Beneficial effects: By setting a busbar assembly between the inner wall of the enclosure and the battery cell, and by setting a fastening plate in the busbar assembly that can be detachably inserted between the abutment assembly and the enclosure, and by setting the abutment assembly and the support member that can be detachably connected, the fastening plate and the abutment assembly and the support member can be selectively installed and removed. When the abutment assembly and the support member are connected and the fastening plate is inserted between the abutment assembly and the inner wall of the enclosure, the abutment assembly and the fastening plate together abut against the battery cell's tab and the enclosure. By installing the busbar in a groove constructed on the side of the abutment assembly facing the battery cell, the busbar abuts against the tab under the combined action of the abutment assembly and the fastening plate. Thus, electrical connection between the busbar and the tab can be achieved without welding. Furthermore, the busbar and the battery cell can be separated when the fastening plate is removed and the abutment assembly is removed from the support member. The installation and removal are convenient, avoiding damage to the busbar and battery cell caused by traditional destructive disassembly, improving safety. The busbar can also be reused, which helps to reduce costs.

[0006] In one alternative embodiment, the support member is stepped, including a first step and a second step, the upper surface of the second step being lower than the upper surface of the first step; the abutting component is located on the second step, and the first step is supported between the bottom surface of the housing and the lower surface of the tab; the abutting component is detachably connected to the second step.

[0007] Beneficial effects: By setting the first step of the support member between the bottom surface of the housing and the lower side of the tab, the support member is guaranteed to support the tab of the battery cell in the vertical direction, improving the stability of the battery cell. Furthermore, by setting the upper surface of the second step of the support member to be lower than the upper surface of the first step, the support member can provide support space for the contact assembly. It can also ensure that the surface of the contact assembly facing the tab has enough space in the vertical direction to set the groove, thereby ensuring that the busbar installed in the groove has sufficient contact area with the tab, ensuring the current carrying capacity of the battery cell.

[0008] In one alternative embodiment, the abutting assembly includes a support plate located on the abutting assembly near the first step portion, the support plate being detachably connected to the second step portion, and a plurality of grooves being formed on the side of the support plate facing the battery cell.

[0009] Beneficial effects: By setting a support plate on the side of the abutment component near the first step, the abutment component abuts against the electrode of the battery cell through the support plate. The structure is simple, easy to process, and highly reliable. In addition, the support plate has enough space to open grooves, which facilitates the installation of the busbar, ensures full contact between the busbar and the electrode, and improves the reliability of the electrical connection between the busbar and the electrode.

[0010] In one optional embodiment, a first connecting hole is provided on the second step portion, a second connecting hole is provided on the support plate, and the busbar assembly further includes a connector that detachably connects the first connecting hole and the second connecting hole.

[0011] Beneficial effects: By opening a first connecting hole on the second step of the support member, setting a second connecting hole on the support plate, and setting a connector to detachably connect the first connecting hole and the second connecting hole, the support member and the support plate can be detachably connected. The structure is simple, the operation is convenient, and it is easy to assemble and disassemble the support plate and the support member.

[0012] In one optional embodiment, the first connecting hole is a threaded hole, the second connecting hole is a through hole, the connector is a threaded connector, the connector includes a head and a rod, the rod passes through the second connecting hole and is threadedly connected to the first connecting hole, and the head is located on the side of the support plate away from the second step.

[0013] Beneficial effects: Threaded connectors are common, readily available, and low in cost. The connectors connect the support plate and the support by passing through the second connecting hole and then threading them into the first connecting hole. This makes the connection easy to operate, convenient to assemble and disassemble, and provides good stability and high reliability after connection.

[0014] In one alternative embodiment, the abutment component further includes an elastic layer disposed on the side of the support plate away from the groove and in contact with the support plate.

[0015] Beneficial effects: By setting an elastic layer on the side of the support plate away from the groove, the elastic layer is squeezed after the fastening plate is inserted between the abutment component and the housing. As a result, the elastic layer exerts a pushing force on the support plate toward the battery cell, which in turn causes the busbar on the support plate to make close contact with the battery cell's tab, further enhancing the stability of the electrical connection.

[0016] In one alternative embodiment, the abutment component further includes a protective plate disposed on the elastic layer on a side away from the support plate and the elastic layer being adhered to it.

[0017] Beneficial effects: By setting a protective plate on the side of the elastic layer away from the support plate, the protective plate is located between the elastic layer and the fastening plate, which can protect the elastic layer and prevent the fastening plate from scratching the elastic layer during assembly, thereby ensuring the reliability of the mating components.

[0018] In one alternative embodiment, the support plate, the elastic layer, and the protective plate are bonded together as a single unit.

[0019] Beneficial effects: The abutment component is an integrated structure made up of a support plate, an elastic layer and a protective plate bonded together. It ensures the stability of the relative positional relationship between the various plates and layers during the assembly process, thereby facilitating the assembly process and improving assembly efficiency and quality.

[0020] In one alternative embodiment, the bus assembly further includes a circuit board connected to the support plate and electrically connected to the bus.

[0021] Beneficial effects: By setting up an electrical connection between the circuit board and the busbar, an electrical connection between the battery cells and the circuit board is achieved, thereby enabling the acquisition of voltage from each battery cell. Furthermore, by connecting the circuit board to the support plate, the support plate provides an installation position for the circuit board, ensuring the stability of the circuit board and thus guaranteeing the reliability of the entire busbar assembly.

[0022] In one alternative embodiment, the bus assembly further includes a thermally conductive silicone pad, one side of which is connected to the circuit board and the other side is adapted to abut against the battery cell to collect the temperature of the battery cell.

[0023] Beneficial effects: The thermally conductive silicone pad has a high thermal conductivity. By setting the thermally conductive silicone pad to contact the battery cell, the temperature of the battery cell can be collected with good stability and high accuracy. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a busbar assembly according to an embodiment of the present utility model;

[0026] Figure 2 for Figure 1 A magnified view of part A in the diagram;

[0027] Figure 3 for Figure 1 An exploded view of the bus assembly shown;

[0028] Figure 4 for Figure 1 A schematic diagram of the busbar assembly from another perspective is shown;

[0029] Figure 5 for Figure 4 An exploded view of the bus assembly from the perspective shown.

[0030] Figure 6 This is a schematic diagram showing the positional relationship between the support plate and the connector before assembly in an embodiment of this utility model.

[0031] Figure 7 for Figure 6 A magnified view of part A in the diagram;

[0032] Figure 8 This is a schematic diagram of the structure of a battery pack according to an embodiment of the present utility model;

[0033] Figure 9 for Figure 8 A top view of the battery pack shown;

[0034] Figure 10 for Figure 9 A cross-sectional view along the CC direction;

[0035] Figure 11 for Figure 10 A partially enlarged schematic diagram of one side of the battery pack along its width direction;

[0036] Figure 12 This is a schematic diagram of the busbar assembly and battery cell assembly according to an embodiment of the present invention;

[0037] Figure 13 for Figure 12 A magnified view of part of D;

[0038] Figure 14 This is a schematic diagram of the structure of the support member and the battery cell after assembly according to an embodiment of the present utility model;

[0039] Figure 15 for Figure 14 A magnified view of part of E in the diagram.

[0040] Explanation of reference numerals in the attached figures:

[0041] 100. Busbar assembly; 1. Support component; 110. First step; 120. Second step; 121. First connecting hole; 2. Abutment component; 210. Support plate; 211. Groove; 212. Second connecting hole; 220. Elastic layer; 230. Protective plate; 3. Fastening plate; 4. Busbar; 5. Connector; 501. Head; 502. Rod; 6. Circuit board; 7. Thermal conductive silicone pad; 10. Housing; 20. Battery cell; 21. Tab. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0043] The following is combined with Figures 1 to 15 The following describes embodiments of the present invention.

[0044] According to an embodiment of the present invention, a battery pack is provided, comprising: a housing 10, battery cells 20, and a busbar assembly 100. The housing 10 has a receiving cavity; the battery cells 20 are disposed in the receiving cavity of the housing 10, and there are multiple battery cells 20 arranged sequentially along the length of the housing 10. Each battery cell 20 has a tab 21 disposed facing the side wall of the receiving cavity; the busbar assembly 100 includes a support member 1, an abutment member 2, a fastening plate 3, and a plurality of busbars 4, such as... Figure 11 As shown, the support member 1 is disposed between the inner wall of the housing 10 and the battery cell 20; the abutment component 2 is detachably connected to the support member 1, and the abutment component 2 is adapted to abut the busbar 4 against the electrode tab 21; the fastening plate 3 is detachably inserted between the abutment component 2 and the inner wall of the housing 10; the abutment component 2 has a plurality of grooves 211, which are spaced apart along the length of the abutment component 2; the busbar 4 is installed in the grooves 211 (combined with...). Figure 5 , Figure 7 As shown), the busbars 4 are electrically connected.

[0045] It should be noted that the length direction refers to... Figures 4 to 7 and Figure 9 The "length direction" indicated by the middle arrow means that the length direction of the abutment component 2 is the same as the "length direction" of the housing 10. The busbar assembly 100 is installed inside the housing 10 of the battery pack. Several battery cells 20 are stacked sequentially along the length direction of the housing 10. Each battery cell 20 includes a cell body and a tab 21. The longer side of the cell body is positioned along the width direction of the housing 10. The tab 21 extends beyond the cell body along the width direction of the housing 10. Along the width direction of the housing 10, there is a gap between the tab 21 of the battery cell 20 and the inner wall of the housing 10. The busbar assembly 100 is positioned between the inner wall of the housing 10's receiving cavity and the end of the battery cell 20 with the tab 21. The number of grooves 211 is equal to the number of battery cells 20 and corresponds one-to-one. The number of busbars 4 is equal to the number of grooves 211, and each busbar 4 is installed in one groove 211 (in conjunction with...). Figure 5 , Figure 7As shown in the diagram, this ensures that one busbar 4 in each groove 211 corresponds to one tab 21 of a battery cell 20. The width direction refers to... Figures 9 to 12 The middle arrow points to the "width direction"; the inner wall of the box 10 refers to the side wall of the cavity in the box 10.

[0046] The battery pack of this embodiment utilizes a busbar assembly 100 disposed between the inner wall of the housing 10 and the battery cell 20. A fastening plate 3 within the busbar assembly 100 is detachably inserted between the abutment assembly 2 and the housing 10, and the abutment assembly 2 is detachably connected to the support member 1. This allows for selective assembly and disassembly of the fastening plate 3 and the abutment assembly 2 and the support member 1. When the abutment assembly 2 is connected to the support member 1 and the fastening plate 3 is inserted between the abutment assembly 2 and the inner wall of the housing 10, the abutment assembly 2 and the fastening plate 3 together abut against the tab 21 of the battery cell 20 and the housing 10. By installing the busbar 4 in the groove 211 constructed on the side of the abutment component 2 facing the battery cell 20, the busbar 4 abuts against the tab 21 under the combined action of the abutment component 2 and the fastening plate 3. Thus, the busbar 4 and the tab 21 can be electrically connected without welding. Furthermore, the busbar 4 and the battery cell 20 can be separated when the fastening plate 3 is pulled out and the abutment component 2 is removed from the support 1. The disassembly and assembly are convenient, avoiding the damage to the busbar 4 and the battery cell 20 caused by traditional destructive disassembly, improving safety. The busbar 4 can also be reused, which helps to reduce costs.

[0047] In one embodiment, the cross-section of the support member 1 is stepped, and the support member 1 includes a first stepped portion 110 and a second stepped portion 120 (see...). Figure 11 , Figure 15 In the illustrated direction, the upper surface of the second step portion 120 is lower than the upper surface of the first step portion 110; the first step portion 110 is supported between the bottom surface of the housing 10 and the lower surface of the tab 21; the abutment component 2 is located on the second step portion 120 and is detachably connected to the second step portion 120. It should be noted that the upper surface refers to the surface along... Figure 11 The surface in the direction indicated by the middle arrow, where "up" is located, has its upper surface of the second step portion 120 located below the upper surface of the first step portion 110. Here, "below" refers to... Figure 11 The direction indicated by the middle arrow is "down"; the lower surface refers to... Figure 11 The surface in the direction indicated by the middle arrow, which points to "down".

[0048] By setting the first step portion 110 of the support member 1 between the bottom surface of the housing 10 and the lower side of the tab 21, the support member 1 ensures the support function of the tab 21 of the battery cell 20 in the vertical direction, improving the stability of the battery cell 20. Furthermore, by setting the upper surface of the second step portion 120 of the support member 1 to be lower than the upper surface of the first step portion 110, the support member 1 provides support space for the abutment component 2. This also ensures that the surface of the abutment component 2 facing the tab 21 has sufficient space in the vertical direction to set the groove 211, thereby ensuring that the busbar 4 installed in the groove 211 has sufficient contact area with the tab 21, ensuring the current carrying capacity of the battery cell 20. The vertical direction is... Figure 11 The direction indicated by the middle arrow is "up and down".

[0049] Further integration Figure 11 , Figure 13 and Figure 15 As shown, when viewed from the length direction of the housing, the support member 1 supports the battery cell 20 between the battery cell body and the inner wall of the housing 10 along the width direction. The first step portion 110 abuts against the battery cell body, and the second step portion 120 abuts against the inner wall of the housing 10. This can limit the battery cell 20 along the width direction and improve the stability of the relative position of the battery cell 20 inside the housing 10. Furthermore, the abutment component 2 and the fastening plate 3 are both located on the second step portion 120. The second step portion 120 provides an installation position for the abutment component 2 and the fastening plate 3, making it convenient to install the abutment component 2 and the fastening plate 3 in the gap between the electrode tab 21 and the inner wall of the housing 10, thus facilitating operation.

[0050] Specifically, a number of grooves 211 are formed on the side of the abutment component 2 facing the direction of the first step portion 110, ensuring that the grooves 211 face the tabs 21 of the cell 20.

[0051] Preferably, the fastening plate 3 is inserted between the abutment component 2 and the inner wall of the housing 10 by an interference fit, so that the busbar 4 and the tab 21 are in close contact, thereby enhancing the stability of the electrical connection between the busbar 4 and the tab 21. It should be noted that during the installation of the busbar assembly 100 between the battery cell 20 and the housing 10, the support member 1 is placed first, and then the abutment component 2 is initially connected to the support member 1 to achieve initial positioning of the abutment component 2 and the support member 1. Then, the fastening plate 3 is inserted to further press the abutment component 2 against the battery cell 20, achieving close contact between the abutment component 2 and the tab 21 of the battery cell 20, thereby achieving close contact between the busbar 4 and the tab 21.

[0052] Optionally, the busbar 4 is fixed in the groove 211 by hot riveting to improve the stability of the relative positional relationship between the busbar 4 and the support plate 210.

[0053] In one embodiment, the abutment component 2 includes a support plate 210, which is located on the side of the abutment component 2 near the first step portion 110. The support plate 210 is detachably connected to the second step portion 120, and a plurality of grooves 211 are formed on the side of the support plate 210 facing the battery cell 20. By setting the side of the abutment component 2 near the first step portion 110 as the support plate 210, the abutment component 2 abuts against the tab 21 of the battery cell 20 through the support plate 210. This design is simple, easy to process, and has high reliability. Furthermore, the support plate 210 has sufficient space to form the grooves 211, thereby facilitating the installation of the busbar 4, ensuring full contact between the busbar 4 and the tab 21, and improving the reliability of the electrical connection between the busbar 4 and the tab 21.

[0054] In one embodiment, a first connecting hole 121 is provided on the second step portion 120, and a second connecting hole 212 is provided on the support plate 210. The busbar assembly 100 also includes a connector 5, which detachably connects the first connecting hole 121 and the second connecting hole 212. By providing a first connecting hole 121 on the second step portion 120 of the support member 1, a second connecting hole 212 on the support plate 210, and a connector 5 detachably connecting the first connecting hole 121 and the second connecting hole 212, a detachable connection between the support member 1 and the support plate 210 is achieved. This results in a simple structure, convenient operation, and easy assembly and disassembly of the support plate 210 and the support member 1.

[0055] In one embodiment, the first connecting hole 121 is a threaded hole, the second connecting hole 212 is a through hole, and the connector 5 is a threaded connector. The connector 5 includes a head 501 and a rod 502. The rod 502 passes through the second connecting hole 212 and is threadedly connected to the first connecting hole 121. The head 501 is located on the side of the support plate 210 away from the second step 120. It should be noted that the centerline of the first connecting hole 121 extends in the vertical direction, and the second connecting hole 212 is a through hole that penetrates the support plate 210 in the vertical direction. Here, the vertical direction refers to... Figures 4 to 5 The direction indicated by the middle arrow is "up and down". Threaded connectors are common, readily available, and low in cost. The connector 5 connects the support plate 210 and the support member 1 by passing the threaded connector through the second connecting hole 212 and then threading it to the first connecting hole 121. This method is easy to operate, convenient to assemble and disassemble, and provides good stability and high reliability after connection.

[0056] Optionally, the connector 5 can be a bolt, which has high strength, low cost, and is easy to install. It is understood that, as an alternative implementation, the connector 5 can also be a screw, which also achieves a detachable connection between the support plate 210 and the support member 1.

[0057] In one embodiment, the abutment component 2 further includes an elastic layer 220, which is disposed on the side of the support plate 210 away from the groove 211 and is in contact with the support plate 210. By providing the elastic layer 220 on the side of the support plate 210 away from the groove 211, after the fastening plate 3 is inserted between the abutment component 2 and the housing 10, the elastic layer 220 is compressed, thereby applying a pushing force towards the battery cell 20 to the support plate 210, which in turn causes the busbar 4 on the support plate 210 to make close contact with the tab 21 of the battery cell 20, further enhancing the stability of the electrical connection.

[0058] Optionally, the elastic layer 220 can be made of various materials such as foam and rubber.

[0059] In one embodiment, the abutment component 2 further includes a protective plate 230, which is disposed on the side of the elastic layer 220 away from the support plate 210 and is attached to the elastic layer 220. By providing the protective plate 230 on the side of the elastic layer 220 away from the support plate 210, the protective plate 230 is located between the elastic layer 220 and the fastening plate 3, which can protect the elastic layer 220 and prevent the fastening plate 3 from scratching the elastic layer 220 during assembly, thereby ensuring the reliability of the abutment component 2.

[0060] Optionally, the protective plate 230 is a PC (Polycarbonate) sheet, which is a rigid plastic with excellent wear resistance and can effectively protect the elastic layer 220.

[0061] In one embodiment, the support plate 210, the elastic layer 220, and the protective plate 230 are bonded together as a single unit. That is, the abutment component 2 is an integral structure formed by bonding the support plate 210, the elastic layer 220, and the protective plate 230 together, which ensures the stability of the relative positional relationship between the various plates and layers during the assembly process, thereby facilitating the assembly process and improving assembly efficiency and quality.

[0062] In one embodiment, the bus assembly 100 further includes a circuit board 6, which is connected to the support plate 210 and electrically connected to the bus 4. It should be noted that the bus 4 is a high-voltage connector, and the circuit board 6 is a low-voltage connector. By electrically connecting the circuit board 6 to the bus 4, the battery cells 20 are electrically connected to the circuit board 6, thereby enabling the acquisition of voltage data from each battery cell 20. Furthermore, by connecting the circuit board 6 to the support plate 210, the support plate 210 provides an installation position for the circuit board 6, ensuring its stability and thus guaranteeing the reliability of the entire bus assembly 100.

[0063] In one embodiment, the circuit board 6 is bonded to the support plate 210. The bonding method is relatively simple and easy to implement, requiring no additional connection structure and occupying little space.

[0064] In one embodiment, circuit board 6 is an FPC (Flexible Printed Circuit), which offers good flexibility, small size, light weight, high reliability, and good durability. Busbar 4 is connected to the nickel strips extending from the FPC via ultrasonic welding.

[0065] In one embodiment, the bus assembly 100 further includes a thermally conductive silicone pad 7, one side of which is connected to the circuit board 6 and the other side is adapted to abut against the battery cell 20 to collect the temperature of the battery cell 20. It should be noted that the thermally conductive silicone pad 7, with one side connected to the circuit board 6 and the other side abutting against the battery cell body, has highly efficient heat conduction capabilities. By setting the thermally conductive silicone pad 7 to abut against the battery cell, the temperature of the battery cell 20 is collected with good stability and high accuracy.

[0066] The bus assembly 100 in this embodiment consists of a support member 1, a support plate 210, an elastic layer 220, a protective plate 230, a fastening plate 3, a bus 4 and a circuit board 6 mounted on the support plate 210, a connector 5 connecting the support plate 210 and the support member 1, and a thermally conductive silicone pad 7 attached to the circuit board 6, forming a CCS (Cells Contact System). The bus assembly 100 and the battery cell 20 are electrically connected by mechanical constraints, eliminating the traditional welding method for electrical connection. This allows for non-destructive disassembly when replacing individual battery cells, and the electrical connection structure can be disassembled and reassembled without damage, greatly reducing maintenance costs.

[0067] The assembly process of the battery cell 20, busbar assembly 100 and housing 10 in the battery pack is as follows:

[0068] First, place the support 1 inside the housing 10, and then place the battery cell 20. The positional relationship between the battery cell 20 and the support 1 is as follows: Figures 14 to 15As shown, the support member 1 is supported on the lower side of the tab 21 of the battery cell 20; then the busbar 4 is installed in the groove 211 opened on the support plate 210, and the busbar 4 is fixed in the groove 211 by hot riveting; then the circuit board 6 and the busbar 4 are welded together by ultrasonic welding to make them conductive, and the main body of the circuit board 6 is glued to the support plate 210, and then the thermally conductive silicone pad 7 is glued to the circuit board 6; then the elastic layer 220 is glued to the side of the support plate 210 away from the groove 211, and then the protective plate 230 is glued to the side of the elastic layer 220 away from the support plate 210. At this time, the elastic layer 220, the protective plate 230, the busbar 4, the circuit board 6, and the thermally conductive silicone pad are all in place. All pads 7 are integrated onto the support plate 210. The support plate 210 is then inserted into the housing 10 and rests against the tabs 21 of the battery cell 20. The support plate 210 is connected to the support member 1 via the connector 5, thus fixing the support member 1, support plate 210, and battery cell 20 relatively. The busbar 4 contacts the tabs 21 of the battery cell 20 to collect the voltage of the battery cell 20. The thermally conductive silicone pad 7 contacts the end face of the battery cell 20 to collect the temperature. Finally, the fastening plate 3 is inserted between the protective plate 230 and the side beam of the housing 10. The interference fit compresses the elastic layer 220, ensuring tight contact between the busbar 4 and the tabs 21, thus enhancing the stability of the electrical connection between the busbar 4 and the tabs 21. The cross-sectional view of the assembled battery pack is shown below. Figures 10 to 11 As shown, the positional relationship between the busbar assembly 100 and the battery cell 20 is as follows: Figures 12 to 13 As shown.

[0069] When a single battery cell needs to be replaced, the procedure is as follows:

[0070] First, remove the fastening plate 3, then remove the connector 5. At this time, the abutment component 2 can be removed. After the abutment component 2 is removed, the busbar 4 will separate from the tab 21. At this time, the high voltage will be disconnected, and the faulty battery cell can be directly removed and replaced with a normal battery cell. Finally, the abutment component 2, connector 5 and fastening plate 3 can be reassembled in sequence.

[0071] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery pack, characterized in that, include: The housing (10) has a receiving cavity; A battery cell (20) is disposed in the receiving cavity of the housing (10). There are multiple battery cells (20), and the multiple battery cells (20) are arranged sequentially along the length direction of the housing (10). Each battery cell (20) has a tab (21) disposed facing the side wall of the receiving cavity. Busbar assembly (100) includes a support member (1), an abutment member (2), a fastening plate (3), and several busbars (4). The support member (1) is disposed between the inner wall of the housing (10) and the battery cell (20); The abutting component (2) is detachably connected to the support member (1), the abutting component (2) is adapted to abut the busbar (4) against the tab (21), and the fastening plate (3) is detachably inserted between the abutting component (2) and the inner wall of the housing (10); The abutting component (2) is provided with a plurality of grooves (211), and the plurality of grooves (211) are distributed at intervals along the length direction of the abutting component (2); The busbars (4) are installed in the grooves (211) and are electrically connected to each other.

2. The battery pack according to claim 1, characterized in that, The support member (1) is stepped, and the support member (1) includes a first step portion (110) and a second step portion (120), wherein the upper surface of the second step portion (120) is lower than the upper surface of the first step portion (110); The first stepped portion (110) is supported between the bottom surface of the housing (10) and the lower surface of the electrode (21); The abutting component (2) is located on the second step portion (120) and is detachably connected to the second step portion (120).

3. The battery pack according to claim 2, characterized in that, The abutting component (2) includes a support plate (210), which is located on the side of the abutting component (2) near the first step portion (110). The support plate (210) is detachably connected to the second step portion (120), and a plurality of grooves (211) are formed on the side of the support plate (210) facing the battery cell (20).

4. The battery pack according to claim 3, characterized in that, The second step portion (120) is provided with a first connecting hole (121), the support plate (210) is provided with a second connecting hole (212), and the busbar assembly further includes a connector (5), which is detachably connected to the first connecting hole (121) and the second connecting hole (212).

5. The battery pack according to claim 4, characterized in that, The first connecting hole (121) is a threaded hole, the second connecting hole (212) is a through hole, the connector (5) is a threaded connector, the connector (5) includes a head (501) and a rod (502), the rod (502) passes through the second connecting hole (212) and is threadedly connected to the first connecting hole (121), and the head (501) is located on the support plate (210) on the side away from the second step (120).

6. The battery pack according to claim 3, characterized in that, The abutting component (2) further includes an elastic layer (220), which is disposed on the side of the support plate (210) away from the groove (211) and is in contact with the support plate (210).

7. The battery pack according to claim 6, characterized in that, The abutment component (2) further includes a protective plate (230), which is disposed on the side of the elastic layer (220) away from the support plate (210) and is attached to the elastic layer (220).

8. The battery pack according to claim 7, characterized in that, The support plate (210), the elastic layer (220), and the protective plate (230) are bonded together as a whole.

9. The battery pack according to any one of claims 3 to 8, characterized in that, The bus assembly (100) further includes a circuit board (6), which is connected to the support plate (210) and electrically connected to the bus (4).

10. The battery pack according to claim 9, characterized in that, The bus assembly (100) further includes a thermally conductive silicone pad (7), one side of which is connected to the circuit board (6) and the other side is adapted to abut against the battery cell (20) to collect the temperature of the battery cell (20).

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