Battery module, battery pack and vehicle

Abstract

The utility model provides a battery module, a battery pack and a vehicle. The battery module comprises a plurality of battery monomers, an end plate, a busbar and a lead-out electrode assembly, the end plates are located at the two ends of the battery monomers in the length direction, and the busbar is electrically connected with at least part of the battery monomers. The leading-out pole assembly comprises a base and a heat dissipation pad installed on the base, the base is installed on the end plate, the busbar is installed on the leading-out pole assembly, and the heat dissipation pad is located between the busbar and the base. The leading-out pole assembly is arranged between the end plate and the busbar, so that the busbar and a metal part of the battery module can be isolated, electrical insulation is realized, and meanwhile, the connection stability and the anti-vibration capability are ensured. Furthermore, the leading-out pole assembly can be detachably arranged between the end plate and the busbar, so that the leading-out pole assembly is convenient to maintain and replace. The contact between the heat dissipation pad and the busbar can effectively alleviate the problem of heat accumulation generated by the busbar, reduce the softening deformation and loss of the material, ensure the stable operation of the battery module function, and further ensure the safety of a user in the use process.

Description

Technical Field

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

[0002] Battery modules typically have lead-out components at both ends to connect the lead-out busbar, electrical connectors, and end plates. During battery module operation, heat accumulation is inevitable, causing thermal deformation of the materials, which in turn leads to softening, deformation, and wear. This affects the connection stability of the lead-out busbar, disrupts the stable operation of the battery module, and may even pose safety hazards to users. Utility Model Content

[0003] This application provides a battery module, a battery pack, and a vehicle for mitigating heat buildup on the battery module.

[0004] This application provides a battery module, the battery module comprising:

[0005] Multiple battery cells;

[0006] End plates, the end plates being located at both ends of the battery cell along its length;

[0007] A busbar, said busbar being electrically connected to at least a portion of said battery cells;

[0008] A lead-out electrode assembly, the lead-out electrode assembly including a base and a heat dissipation pad mounted on the base, the base being mounted on the end plate, and the busbar being mounted on the lead-out electrode assembly;

[0009] The heat dissipation pad is located between the busbar and the base.

[0010] In this design, the lead-out assembly is mounted on the end plate and connected to the busbar, effectively isolating the busbar from the metal components of the battery module and achieving electrical insulation. Furthermore, the lead-out assembly is detachable between the end plate and the busbar, facilitating user maintenance and replacement.

[0011] In addition, to alleviate the overheating problem of the busbar during normal operation of the battery module, a heat dissipation pad is installed on the lead-out terminal assembly. This pad dissipates heat from the busbar into the air, effectively mitigating heat accumulation. Furthermore, the heat dissipation pad located between the busbar and the base acts as an insulator, reducing the risk of heat transfer from the busbar to the base and causing it to soften. This ensures the stable operation of the battery module and ultimately guarantees user safety.

[0012] In one possible implementation, the heat dissipation pad is fixedly connected to the base and the busbar.

[0013] In this design, the busbar is connected to the lead-out component, specifically to the heat sink. The heat sink not only provides heat dissipation and insulation but also serves to connect to the busbar, thereby improving the connection stability between the lead-out component and the busbar.

[0014] In one possible implementation, the heat dissipation pad is made of spring steel.

[0015] In this solution, during the operation of the battery module, when the busbar heats up, the heat dissipation pad made of spring steel can play a good role in heat insulation, thereby promoting the heat dissipation of the busbar. At the same time, the excellent load-bearing capacity of spring steel can also improve the fact that the heat dissipation pad is not easy to break or deform when connected to the busbar and the base.

[0016] In one possible implementation, the heat dissipation pad includes a body, the body including an extension extending toward the base, the extension having a first mounting hole, and the extension being connected to the busbar through the first mounting hole.

[0017] In this design, the extension extends towards the base. When the heat sink and the busbar are connected via a connector, the extension increases the connection area between the connector and the heat sink, thereby improving the reliability of the connection between the heat sink and the busbar. Simultaneously, the extension is positioned away from the busbar to prevent protrusions between the heat sink and the busbar, reducing the contact area between them. This, in turn, helps to maximize the heat dissipation and insulation functions of the heat sink and mitigate the thermal effects of the busbar.

[0018] Specifically, in this design, the connection between the first mounting hole and the bolt provides excellent structural stability and load-bearing capacity, ensuring a high-strength connection between the heat sink and the busbar, and guaranteeing their load-bearing and deformation resistance. The first mounting hole is concealed within the profile, achieving a hidden design without any exposed protrusions. This design not only increases the effective contact area between the heat sink and the busbar but also saves layout space.

[0019] In one possible implementation, the base has at least two slots extending along the height direction of the end plate, and the heat dissipation pad further includes two flanges, which are respectively disposed on both sides of the body along the width direction of the end plate, and the flanges are inserted into the slots.

[0020] In this design, the open end of the slot provides positioning for the flange of the heatsink, allowing the slot and flange to interlock and ensure a stable connection between the heatsink and the base. Flanges are provided on both sides of the heatsink for interlocking with the base slots. The flanges distribute force evenly after insertion, ensuring a stable connection between the heatsink and the base and preventing the heatsink from detaching from the base.

[0021] In addition, the structural design adopts a plug-in method to fix the heat dissipation pad and the base, which improves the connection stability between the two. This design can effectively prevent loosening in environments such as vehicle vibration, and the plug-in structure still maintains high reliability after long-term use.

[0022] In one possible implementation, the flange has a plurality of spaced-apart first protrusions.

[0023] In this design, the spaced first protrusions on the flange of the heat dissipation pad can effectively increase the friction between the flange and the slot, thereby enhancing the connection stability and mechanical reliability between the heat dissipation pad and the base.

[0024] In one possible implementation, the flange is located on one side of the body along the thickness direction of the end plate, so that the body is flush with the first end face of the base, and the busbar abuts against the first end face of the body and the base.

[0025] In this design, the thickness difference between the flange of the heat dissipation pad and the main body allows the main body to be flush with the first end face of the base. This means that the main body of the heat dissipation pad and the first end face of the base respectively abut against the busbar, so that each position of the busbar can abut against the main body of the heat dissipation pad or the first end face of the base, making the force on each position of the busbar uniform and improving the reliability of the busbar.

[0026] In one possible implementation, the base has a rib on its second end face facing the heat dissipation pad, and the heat dissipation pad has a second protrusion protruding in the direction facing the base, the second protrusion abutting against the rib.

[0027] In this design, the raised ribs provide support for the second raised portion, improving the connection stability between the heat dissipation pad and the base.

[0028] This application also provides a battery pack, which includes a housing and at least one battery module as described in any one of the above embodiments.

[0029] Furthermore, this application embodiment also provides a vehicle, the vehicle including a vehicle body and a battery pack, the battery pack being the battery pack described above.

[0030] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the battery module structure assembly in an embodiment of this application;

[0032] Figure 2This is a schematic diagram of the structural assembly of the lead-out electrode assembly in the embodiments of this application;

[0033] Figure 3 This is an exploded view of the structure of the lead-out electrode component in the embodiments of this application;

[0034] Figure 4 This is a schematic diagram of the base structure in an embodiment of this application;

[0035] Figure 5 This is a schematic diagram of the structure of the heat dissipation pad in the embodiment of this application.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1- Lead-out electrode assembly;

[0038] 11-Base;

[0039] 111 - Mounting slot;

[0040] 1111 - Slot;

[0041] 1112-convex rib;

[0042] 1113 - First cavity;

[0043] 1114 - Second cavity;

[0044] 1115 - Second end face;

[0045] 112 - First end face;

[0046] 113 - Second mounting hole;

[0047] 12- Heat dissipation pad;

[0048] 121-Ontology;

[0049] 1211 - Extension;

[0050] 1211a - First mounting hole;

[0051] 1212 - Second protrusion;

[0052] 122 - Flip the edge;

[0053] 1221 - First protrusion;

[0054] 2- End plate;

[0055] 3- Busbar

[0056] 4- Battery cell;

[0057] 5- Electrical connections;

[0058] 6- Pressing strip.

[0059] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation

[0060] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0061] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0062] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0063] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0064] In one specific embodiment, this application provides a vehicle including a vehicle body and a battery pack. The vehicle body provides space for the battery pack, and the battery pack provides power output to the vehicle body. The vehicle can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. This application does not specifically limit the type of vehicle. The following description uses a pure electric vehicle as an example.

[0065] In one specific embodiment, the battery pack includes a housing and multiple battery modules housed within the housing. The housing may be made of aluminum, aluminum alloy, or other metallic materials, or it may be made of a non-metallic material. The housing provides space for the secondary batteries and can employ various structures.

[0066] In some embodiments, the housing may include a bottom cover and a top cover. The bottom cover is an open-top structure, and the size of the top opening of the top cover is approximately the same as that of the bottom cover. The top cover can be closed onto the bottom cover, and the top cover and bottom cover can be connected by fasteners such as bolts. The top cover and bottom cover form a receiving space for accommodating the battery module. The housing may have various shapes, such as a cylinder or a cuboid.

[0067] A seal can also be installed between the top cover and the bottom cover to seal the containment space.

[0068] In a battery module, multiple battery cells can be connected in series, parallel, or a combination thereof. A combination thereof means that multiple battery cells are connected in both series and parallel configurations. In some embodiments, multiple battery cells can be directly connected in series, parallel, or a combination thereof, and then the entire assembly of the multiple battery cells is housed within a casing. The multiple battery cells can be arranged side by side along the length of the battery pack or along the width of the battery pack.

[0069] The battery module also includes a frame structure, which may include interconnected end plates, side plates, top plates and bottom plates. Multiple battery cells are located in the inner cavity of the frame structure and are stacked on top of each other in the inner cavity of the frame structure. The stacking direction may be the length direction, the width direction or the height direction.

[0070] In addition, the battery pack may include other structures, such as busbars, for electrical connection between multiple battery cells.

[0071] The battery cells can be cylindrical, flat, cuboid, or other shapes.

[0072] Figure 1 A partial structural schematic diagram of a battery module in one specific embodiment is shown. In this embodiment, this application provides a battery module, with reference to... Figure 1 As shown, the battery module includes multiple battery cells 4, end plates 2, busbars 3, and lead-out electrode assemblies 1. The end plates 2 are located at both ends of the battery cells 4 along their length, and the busbars 3 are electrically connected to at least a portion of the battery cells 4.

[0073] refer to Figure 2 and Figure 3 As shown, the lead-out component 1 includes a base 11 and a heat dissipation pad 12 mounted on the base 11, as referenced. Figure 1 As shown, the base 11 is mounted on the end plate 2, and the busbar 3 is mounted on the lead-out electrode assembly 1, wherein the heat dissipation pad 12 is located between the busbar 3 and the base 11.

[0074] In this embodiment, reference Figure 1As shown, the battery cell 4 is the basic energy storage unit of the battery module. The battery cell 4 is responsible for storing and releasing electrical energy within the battery module, directly determining the module's range and lifespan. Multiple battery cells 4 arranged along the length form a battery string. The end plates 2 are located at both ends of the battery string, primarily providing structural support and fixation to prevent the battery cells 4 from shifting under vibration or impact, ensuring the overall stability of the battery module. The busbar 3 can be made of aluminum and is electrically connected to the battery cells 4. Specifically, the connection between the busbar 3 and the battery cells 4 can be welding. The busbar 3 is used to form a current path between multiple battery cells 4.

[0075] In other embodiments, the busbar 3 can also be made of other materials, such as copper, copper-aluminum composite materials, etc. This application does not limit the specific material of the busbar 3.

[0076] In other embodiments, the busbar 3 and the battery cell 4 can also be fixedly connected by other means, such as riveting or bonding. This application does not limit the specific connection method between the busbar 3 and the battery cell 4, as long as an electrical connection with the battery cell 4 can be achieved.

[0077] In this embodiment, reference Figure 1 As shown, the lead-out electrode assembly 1 is mounted on the end plate 2 and connected to the busbar 3, which can isolate the busbar 3 from the metal parts of the battery module, achieving electrical insulation. Furthermore, the lead-out electrode assembly 1 can be detached between the end plate 2 and the busbar 3, making it convenient for users to perform maintenance and replace the lead-out electrode assembly 1.

[0078] In addition, during the normal operation of the battery module, the busbar 3 will generate heat. When the heat dissipation conditions around the busbar 3 are poor, the heat is difficult to dissipate, and the surrounding environment of the busbar 3 will heat up. The continuous high temperature will cause thermal fatigue of the material and may cause the base 11 to soften, or even cause safety hazards such as short circuit.

[0079] To alleviate these problems, refer to Figure 2 and Figure 3 As shown, a heat dissipation pad 12 is provided on the lead-out electrode assembly 1. The lead-out electrode assembly 1 includes a base 11 and a heat dissipation pad 12 mounted on the base 11. Further, refer to... Figure 1 As shown, the base 11 of the lead-out electrode assembly 1 is mounted on the end plate 2, and the heat dissipation pad 12 is located between the busbar 3 and the base 11. The heat dissipation pad 12 dissipates the heat of the busbar 3 into the air, effectively alleviating the heat accumulation problem caused by the busbar 3. Moreover, the heat dissipation pad 12 located between the busbar 3 and the base 11 can insulate against heat, thereby reducing the risk of heat transfer from the busbar 3 to the base 11 causing the base 11 to soften, ensuring the stable operation of the battery module, and thus ensuring the safety of the user during use.

[0080] In one specific embodiment, the heat dissipation pad 12 is fixedly connected to the base 11 and the busbar 3.

[0081] In this embodiment, reference Figure 1 As shown, the lead-out electrode assembly 1 and the busbar 3 can be fixedly connected by bolts, and the heat dissipation pad 12 and the busbar 3 can be fixedly connected by bolts.

[0082] In other embodiments, the heat dissipation pad 12 can also be fixedly connected to the base 11 and the busbar 3 by other means, such as key connection, riveting, etc. This application does not limit the specific connection method between the heat dissipation pad 12 and the base 11 and the busbar 3.

[0083] In one specific embodiment, the heat dissipation pad 12 is made of spring steel.

[0084] In this embodiment, the heat dissipation pad 12 is specifically made of spring steel. Spring steel, as a type of steel with high load-bearing capacity, has the advantages of fatigue resistance and high temperature resistance. During the operation of the battery module, when the busbar 3 heats up, the heat dissipation pad 12 made of spring steel can play a good role in heat insulation, thereby promoting the heat dissipation of the busbar 3. At the same time, the excellent load-bearing capacity of spring steel can also improve the fact that the heat dissipation pad 12 is not easy to break or deform when connected to the busbar 3 and the base 11.

[0085] In one specific embodiment, reference is made to... Figure 5 As shown, the heat dissipation pad 12 includes a body 121, the body 121 including an extension 1211 extending toward the base 11, the extension 1211 being provided with a first mounting hole 1211a, see reference. Figure 1 As shown, the extension 1211 is connected to the busbar 3 through the first mounting hole 1211a.

[0086] In this embodiment, reference Figure 5 As shown, the extension 1211 extends toward the base 11. When the heat dissipation pad 12 and the busbar 3 are connected by a connector, the extension 1211 increases the connection area between the connector and the heat dissipation pad 12, thereby improving the connection reliability between the heat dissipation pad 12 and the busbar 3. At the same time, the extension 1211 is positioned away from the busbar 3 to avoid the formation of protruding structures between the heat dissipation pad 12 and the busbar 3, thus reducing the contact area between them. This helps to maximize the heat dissipation and insulation functions of the heat dissipation pad 12 and alleviate the thermal effect of the busbar 3.

[0087] Furthermore, in this embodiment, the heat dissipation pad 12 has at least two extensions 1211, so that the heat dissipation pad 12 and the busbar 3 are connected by at least two connectors, thereby preventing the busbar 3 from rotating relative to the heat dissipation pad 12 and affecting the connection stability between the heat dissipation pad 12 and the busbar 3.

[0088] refer to Figure 1 As shown, the heat dissipation pad 12 and the busbar 3 are fixedly connected through a first mounting hole 1211a on the extension 1211. Specifically, the heat dissipation pad 12 and the busbar 3 are fixedly connected through the engagement of the first mounting hole 1211a and a bolt. The engagement of the first mounting hole 1211a and the bolt provides good structural stability and load-bearing capacity, offering a high-strength connection between the heat dissipation pad 12 and the busbar 3, ensuring their load-bearing and deformation resistance. The first mounting hole 1211a is hidden inside the profile, thus achieving a concealed design without any exposed protrusions. This design not only increases the effective contact area between the heat dissipation pad 12 and the busbar 3 but also saves layout space.

[0089] In one specific embodiment, reference is made to... Figure 4 As shown, the base 11 has at least two slots 1111 extending along the height direction of the end plate 2, as referenced. Figure 5 As shown, the heat dissipation pad 12 also includes two flanges 122, which are respectively disposed on both sides of the body 121 along the width direction of the end plate 2. Figure 2 As shown, the flange 122 of the heat dissipation pad 12 can be inserted into the slot 1111 of the base 11.

[0090] In this embodiment, reference Figure 4 As shown, the open end of slot 1111 provides a positioning function for the flange 122 of the heat sink 12, thereby enabling slot 1111 and flange 122 to engage and ensure a stable connection between the heat sink 12 and the base 11. (Reference) Figure 5 As shown, the heat dissipation pad 12 also includes two flanges 122. The flanges 122 are respectively disposed on both sides of the body 121 along the width direction of the end plate 2. The flanges 122 are disposed on both sides of the heat dissipation pad 12 for insertion into the slot 1111 of the base 11. After the flanges 122 are inserted into the slot 1111, the force is evenly distributed, which ensures the stability of the insertion connection between the heat dissipation pad 12 and the base 11, thereby avoiding the risk of the heat dissipation pad 12 detaching from the base 11.

[0091] refer to Figure 2 As shown, the flange 122 of the heat dissipation pad 12 can be inserted into the slot 1111 of the base 11. The structural design adopts a plug-in method to achieve a fixed connection between the heat dissipation pad 12 and the base 11, which improves the connection stability between the two. This design can effectively prevent loosening in environments such as vehicle vibration, and the plug-in structure still maintains high reliability after long-term use.

[0092] In one specific embodiment, reference is made to... Figure 5 As shown, the flange 122 of the heat dissipation pad 12 has a plurality of spaced first protrusions 1221.

[0093] In this embodiment, reference Figure 5 As shown, the spaced first protrusions 1221 on the flange 122 of the heat dissipation pad 12 can effectively improve the friction between the flange 122 and the slot 1111, thereby enhancing the connection stability and mechanical reliability of the heat dissipation pad 12 and the base 11.

[0094] In one specific embodiment, reference is made to... Figure 2 and Figure 5 As shown, the flange 122 is located on one side of the body 121 along the thickness direction of the end plate 2, so that the body 121 is flush with the first end face 112 of the base 11. Specifically, the busbar 3 abuts against the body 121 of the heat dissipation pad 12 and the first end face 112 of the base 11.

[0095] In this embodiment, reference Figure 5 As shown, the flange 122 of the heat dissipation pad 12 has a certain thickness difference from the body 121. Specifically, the body 121 of the heat dissipation pad 12 is located on the side closer to the busbar 3 than the flange 122. Figure 2 As shown, the flange 122 of the heat dissipation pad 12 has a certain thickness difference with the body 121, which enables the body 121 to be flush with the first end face 112 of the base 11. That is, the body 121 of the heat dissipation pad 12 and the first end face 112 of the base 11 respectively abut against the busbar 3, so that each position of the busbar 3 can abut against the body 121 of the heat dissipation pad 12 or the first end face 112 of the base 11, making the force on each position of the busbar 3 uniform and improving the reliability of the busbar 3.

[0096] In one specific embodiment, reference is made to... Figure 4 As shown, the second end face 1115 of the base 11 facing the heat dissipation pad 12 has a raised rib 1112, for reference. Figure 5 As shown, the heat dissipation pad 12 has a second protrusion 1212 that protrudes toward the base 11, for reference. Figure 2 As shown, the second protrusion 1212 abuts against the rib 1112.

[0097] In this embodiment, the second protrusion 1212 of the heat dissipation pad 12 abuts against the rib 1112 of the base 11, and the rib 1112 provides support for the second protrusion 1212, thereby improving the connection stability between the heat dissipation pad 12 and the base 11. The shape of the second protrusion 1212 can be a raised surface, a protrusion, etc., and this application does not limit the specific shape of the second protrusion 1212.

[0098] In one specific embodiment, reference is made to... Figure 4 As shown, the base 11 has a mounting groove 111 along the thickness direction of the end plate 2. The mounting groove 111 includes a slot 1111 for insertion into the heat sink 12 and a rib 1112 for abutting against the second protrusion 1212. The rib 1112 divides the mounting groove 111 into a first cavity 1113 and a second cavity 1114. (Reference) Figure 2 As shown, when the heat dissipation pad 12 is fixedly connected to the base 11, the two extensions 1211 of the heat dissipation pad 12 are located in the first cavity 1113 and the second cavity 1114 of the base 11, respectively.

[0099] In this embodiment, the first cavity 1113 and the second cavity 1114 provide a fitting space for the bolted connection between the busbar 3 and the heat dissipation pad 12, thus avoiding the risk of collision and material damage during the fitting process.

[0100] In one specific embodiment, reference is made to... Figure 4 As shown, the base 11 also includes at least two second mounting holes 113.

[0101] In this embodiment, combined with Figure 1 and Figure 4 As shown, the second mounting hole 113 is used to fix the base 11 to the end plate 2, and further, to fix the lead-out electrode assembly 1 to the end plate 2. Specifically, the base 11 and the end plate 2 can be bolted together through the second mounting hole 113. Providing at least two second mounting holes 113 prevents the base 11 from rotating relative to the end plate 2, thus avoiding any impact on the stability of the connection between the lead-out electrode assembly 1 and the end plate 2.

[0102] In this embodiment, reference Figure 1 As shown, the battery module also includes an electrical connector 5, which is located on the side of the busbar 3 away from the lead electrode assembly 1. The electrical connector 5 has bolt holes, and the electrical connector 5, the busbar 3, and the heat dissipation pad 12 on the lead electrode assembly 1 are fixedly connected by bolts.

[0103] Additionally, refer to Figure 1 As shown, the battery module also includes pressure strips 6 for fixing multiple battery cells 4.

[0104] The above descriptions are merely specific implementations of the embodiments of this application, but the protection scope of the embodiments of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the embodiments of this application should be covered within the protection scope of the embodiments of this application. Therefore, the protection scope of the embodiments of this application should be determined by the protection scope of the claims.

Claims

1. A battery module, characterized in that, The battery module includes: Multiple battery cells (4); End plates (2), the end plates (2) are located at both ends of the battery cell (4) along the length direction; Busbar (3), said busbar (3) being electrically connected to at least a portion of said battery cells (4); Lead-out electrode assembly (1), the lead-out electrode assembly (1) includes a base (11) and a heat dissipation pad (12) mounted on the base (11), the base (11) is mounted on the end plate (2), and the busbar (3) is mounted on the lead-out electrode assembly (1). The heat dissipation pad (12) is located between the busbar (3) and the base (11).

2. The battery module according to claim 1, characterized in that, The heat dissipation pad (12) is fixedly connected to the base (11) and the busbar (3).

3. The battery module according to claim 2, characterized in that, The heat dissipation pad (12) is made of spring steel.

4. The battery module according to claim 2, characterized in that, The heat dissipation pad (12) includes a body (121), the body (121) includes an extension (1211) extending toward the base (11), the extension (1211) is provided with a first mounting hole (1211a), and the extension (1211) is connected to the busbar (3) through the first mounting hole (1211a).

5. The battery module according to claim 4, characterized in that, The base (11) has at least two slots (1111) extending along the height direction of the end plate (2), and the heat dissipation pad (12) also includes two flanges (122), which are respectively disposed on both sides of the body (121) along the width direction of the end plate (2), and the flanges (122) are inserted into the slots (1111).

6. The battery module according to claim 5, characterized in that, The flange (122) has a plurality of spaced-apart first protrusions (1221).

7. The battery module according to claim 5, characterized in that, The flange (122) is located on one side of the body (121) along the thickness direction of the end plate (2) so that the body (121) is flush with the first end face (112) of the base (11) and the busbar (3) abuts against the first end face (112) of the body (121) and the base (11).

8. The battery module according to any one of claims 1-7, characterized in that, The base (11) has a rib (1112) on its second end face (1115) facing the heat dissipation pad (12), and the heat dissipation pad (12) has a second protrusion (1212) protruding in the direction of the base (11), and the second protrusion (1212) abuts against the rib (1112).

9. A battery pack, characterized in that, The battery pack includes a housing and at least one battery module as claimed in any one of claims 1-8.

10. A vehicle, characterized in that, The vehicle includes a vehicle body and a battery pack, wherein the battery pack is the battery pack as described in claim 9.

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