Battery module and battery pack

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery module and a battery pack, the battery module is composed of a battery assembly, a supporting assembly and a side plate assembly, the battery assembly is arranged on the supporting assembly, the supporting assembly is used as a bottom plate of the battery pack, and the side plate assembly is located on the side edge, adjacent to the supporting assembly, of the battery assembly. And the side plate assembly is connected with the supporting assembly. According to the structure, the supporting assembly and the side plate assembly are adjacently arranged on the battery assembly, and the supporting assembly serves as a bottom plate of the battery pack, so that the side plate assembly is connected with the supporting assembly on the side edge of the battery assembly, the transverse space occupation of the battery module in the battery pack is reduced, and more layout space is provided for other parts; according to the battery module, the compactness, the integration degree, the space utilization rate and the system energy density of the battery pack are effectively improved, and the side plate assemblies are directly connected with the supporting assemblies, so that a mounting plate is omitted, the structure of the battery module is simplified, and the material cost and the production cost are reduced.

Description

Technical Field

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

[0002] With the continuous development of battery technology, the installation structure of battery modules is crucial to the performance and space utilization of battery packs. Existing patent document "CN214254618U" discloses a mounting bracket for a module side plate and a battery module assembly. It adopts a method in which the battery module is connected to the bottom plate of the battery pack through a mounting plate on the mounting bracket. Although the mounting plate and the side plate of the battery module are located on the same side, the installation method can fix the battery module, but it has significant drawbacks. On the one hand, the mounting plate occupies a lot of space in the battery pack, which greatly compresses the layout space of other components in the battery pack and affects the overall compactness and integration of the battery pack. On the other hand, the material cost and weight of the entire battery module increase, increasing the production cost. Utility Model Content

[0003] The main objective of this utility model is to provide a battery module and battery pack, which aims to solve the technical problem that existing battery modules are connected to the bottom plate of the battery pack via a mounting plate on a mounting bracket, and the mounting plate and the side plate of the battery module are located on the same side, resulting in low space utilization of the entire battery pack and increased material costs and weight of the battery module.

[0004] To achieve the above-mentioned utility model objectives, this utility model proposes a battery module, including a battery assembly, a support assembly, and a side plate assembly;

[0005] The battery assembly is mounted on the support assembly, which serves as the base plate of the battery pack. The side plate assembly is mounted on the side of the battery assembly adjacent to the support assembly and is connected to the support assembly.

[0006] Furthermore, the support assembly includes a first base plate, a second base plate, and a plurality of first reinforcing ribs, wherein the first base plate and the second base plate are arranged opposite to each other, and the plurality of first reinforcing ribs are spaced apart between the first base plate and the second base plate.

[0007] Furthermore, the side panel assembly includes a side panel body and a side panel connector, the side panel connector being connected to the support assembly, and the side panel body being detachably connected to the side panel connector on the side away from the support assembly.

[0008] Furthermore, the side panel body includes a support block, a straight plate, and a snap-fit ​​plate. The straight plate is disposed between the support block and the snap-fit ​​plate, and the support block, the straight plate, and the snap-fit ​​plate are an integral piece.

[0009] Furthermore, the side plate connector is provided with a snap-fit ​​groove, and the straight plate is connected to the side plate connector by being inserted into the snap-fit ​​groove through the snap-fit ​​plate.

[0010] Furthermore, the straight plate includes a first sidewall, a second sidewall, and a plurality of second reinforcing ribs, wherein the first sidewall and the second sidewall are arranged opposite to each other, and the plurality of second reinforcing ribs are spaced apart between the first sidewall and the second sidewall.

[0011] Furthermore, the battery assembly includes a first buffer and a plurality of battery cells, the first buffer being disposed on the support assembly, and the battery cells being disposed on the side of the first buffer away from the support assembly.

[0012] Furthermore, the battery module also includes multiple liquid cooling plates, with each battery cell arranged corresponding to a liquid cooling plate, and the liquid cooling plates disposed between adjacent battery cells.

[0013] Furthermore, the liquid cooling plate is provided with an inlet and an outlet arranged opposite to each other, and a liquid cooling baffle is provided inside the liquid cooling plate. The liquid cooling baffle is located between the inlet and the outlet, and both ends of the liquid cooling plate extend a specified distance toward the inlet and the outlet, respectively.

[0014] Furthermore, the battery module also includes a pressure plate assembly and a second buffer member. The second buffer member is disposed on the side of the battery module away from the support assembly, and the pressure plate assembly is disposed on the side of the second buffer member away from the battery module. The pressure plate assembly is connected to the side plate assembly.

[0015] Furthermore, the second buffer includes a first buffer layer, a second buffer layer, and a third buffer layer stacked sequentially from the battery assembly toward the pressure plate assembly, and the areas of the first buffer layer, the second buffer layer, and the third buffer layer decrease from the battery assembly toward the pressure plate assembly.

[0016] Furthermore, the pressure plate assembly includes a first pressure plate and a second pressure plate, the second pressure plate being disposed on the side of the first pressure plate away from the second buffer member, and a plurality of third reinforcing ribs protruding in a direction away from the first pressure plate are provided on the second pressure plate.

[0017] This utility model also proposes a battery pack, including the battery module described in any of the above embodiments, and further including a side beam and a cover, wherein the side beam is disposed on the support assembly, and the cover covers the battery module and is connected to the side beam.

[0018] Beneficial effects:

[0019] This utility model discloses a battery module, including a battery assembly, a support assembly, and a side plate assembly. The battery assembly is mounted on the support assembly, which serves as the base plate of the battery pack. The side plate assembly is located on the side of the battery assembly adjacent to the support assembly and is connected to the support assembly. Therefore, by arranging the support assembly and side plate assembly adjacent to the battery assembly, with the support assembly acting as the base plate of the battery pack, and the battery assembly stably held between the two side plate assemblies, and the side plate assembly connected to the support assembly (which is equivalent to the base plate of the battery pack), it eliminates the need for mounting brackets on the side plate to connect to the base plate of the battery pack, as in existing technologies. This reduces the lateral space occupied by the battery module within the battery pack, freeing up more layout space for other components, improving the overall compactness and integration of the battery pack, and increasing space utilization and system energy density. Furthermore, the direct connection of the side plate assembly to the support assembly eliminates the need for a separate mounting plate, simplifying the battery module structure and reducing material usage, thereby lowering material costs. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a battery module according to an embodiment of the present invention;

[0021] Figure 2 This is an embodiment of the present utility model. Figure 1 Enlarged view of a portion at point A;

[0022] Figure 3 This is an embodiment of the present utility model. Figure 1 A magnified view of section B;

[0023] Figure 4 This is a schematic diagram of a side panel assembly according to an embodiment of the present invention;

[0024] Figure 5 This is an embodiment of the present utility model. Figure 4 A magnified view of a portion at point C;

[0025] Figure 6 This is an embodiment of the present utility model. Figure 4 A magnified view of a portion at point D;

[0026] Figure 7 This is a schematic diagram of the second buffer component according to an embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of a pressure plate assembly according to an embodiment of the present invention;

[0028] Figure 9 This is a front view of a liquid cooling plate according to an embodiment of the present invention;

[0029] Figure 10 This is an embodiment of the present utility model. Figure 9 Sectional view at point AA;

[0030] Figure 11 This is an embodiment of the present utility model. Figure 10 A magnified view of a portion at point E;

[0031] Figure 12 This is an embodiment of the present utility model. Figure 10 A magnified view of a portion at point F.

[0032] in:

[0033] 1. Battery assembly; 2. Support assembly; 3. Side plate assembly; 4. Pressure plate assembly; 5. Second buffer component;

[0034] 101. Battery cell; 11. First buffer component;

[0035] 102. Liquid cooling plate; 103. Water inlet; 104. Water outlet; 105. Liquid cooling baffle;

[0036] 20. First base plate; 21. Second base plate; 22. First reinforcing rib;

[0037] 30. Side panel main body; 31. Side panel connector;

[0038] 301. Support block; 302. Straight plate; 303. Connecting plate;

[0039] 3020, First sidewall; 3021, Second sidewall; 3022, Second reinforcing rib;

[0040] 3030, Snap-fit ​​main body; 3031, Extension part;

[0041] 310. Connecting body; 311. Folded edge; 312. Snap-fit ​​groove;

[0042] 40. First pressure plate; 41. Second pressure plate; 42. Third reinforcing rib;

[0043] 50. First buffer layer; 51. Second buffer layer; 52. Third buffer layer.

[0044] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0045] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0046] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly and specifically defined.

[0047] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] Reference Figure 1 , Figure 3 This embodiment provides a battery module, including a battery assembly 1, a support assembly 2, and a side plate assembly 3;

[0050] The battery assembly 1 is mounted on the support assembly 2, which serves as the base plate of the battery pack. The side plate assembly 3 is mounted on the side of the battery assembly 1 adjacent to the support assembly 2 and is connected to the support assembly 2.

[0051] In the above embodiment, the battery module consists of a battery assembly 1, a support assembly 2, and a side plate assembly 3. The battery assembly 1 is used to store and release electrical energy. The battery assembly 1 is placed on the support assembly 2, and its width is smaller than the width of the support assembly 2. Therefore, a specified gap is formed between the long side of the battery assembly 1 and the long side of the support assembly 2. This gap is fully utilized to install the side plate assembly 3. The side plate assembly 3 consists of two parts, which are respectively set on the long side of the battery assembly 1 on both sides, so that the battery assembly 1 is located between the two side plate assemblies 3, which is used to suppress battery cycle expansion and thus improve the battery's service life. The battery assembly 1 and the side plate assembly 3 are tightly connected, and the overall width does not exceed the width of the support assembly 2. In addition, the battery assembly 1 is connected to the side plate assembly 3 by adhesive. The support assembly 2 is a metal structural component, which serves as the base plate of the entire battery pack, i.e., the battery module 1. The support component 2 (base plate) and the base plate of the battery pack are integrated base plates, connecting the side plate component 3 to the support component 2. Therefore, the support component 2 and the side plate component 3 are arranged adjacent to each other on the battery component 1, and the battery component 1 is stably clamped between the two side plate components 3. Thus, the side plate component 3 is directly connected to the support component 2, which is equivalent to the base plate of the battery pack. Unlike the prior art, it does not need to be connected to the base plate of the battery pack through the mounting bracket on the side plate. The side plate component 3 is connected to the support component 2 on the side of the battery component 1, which reduces the lateral space occupied by the battery module in the battery pack, leaving more layout space for other components, improving the overall compactness and integration of the battery pack, and improving space utilization and system energy density. At the same time, the side plate component 3 is directly connected to the support component 2, eliminating the separate component of the mounting plate, which not only simplifies the structure of the battery module, but also reduces the use of materials, thereby reducing material costs.

[0052] Reference Figures 1-2 In one embodiment, the support component 2 includes a first base plate 20, a second base plate 21, and a plurality of first reinforcing ribs 22. The first base plate 20 and the second base plate 21 are arranged opposite to each other, and the plurality of first reinforcing ribs 22 are spaced apart between the first base plate 20 and the second base plate 21.

[0053] In the above embodiment, the support component 2 is composed of a first base plate 20, a second base plate 21, and a plurality of first reinforcing ribs 22. The first base plate 20 and the second base plate 21 are connected to each other through the first reinforcing ribs 22 to form a stable sandwich structure. The first base plate 20 and the second base plate 21 are the same size and symmetrically arranged, located at the upper and lower ends of the entire support component 2, respectively. The first base plate 20 serves as the upper base plate, and the second base plate 21 serves as the lower base plate. The plurality of first reinforcing ribs 22 are evenly distributed between the first base plate 20 and the second base plate 21, extending along the width direction of the first base plate 20 and perpendicular to both, effectively preventing excessive deformation at the bottom and affecting the battery cycle life. Through holes with openings at both ends are formed between adjacent first reinforcing ribs 22. At the same time, the first base plate 20, the second base plate 21, and the first reinforcing ribs 22 are integral parts with the same wall thickness, ranging from 1.5mm to 3mm, which significantly improves the overall strength and rigidity of the support component 2 and can effectively bear the weight of the battery component 1.

[0054] Reference Figure 1 , Figure 4 In one embodiment, the side panel assembly 3 includes a side panel body 30 and a side panel connector 31, the side panel connector 31 being connected to the support assembly 2, and the side panel body 30 being detachably connected to the side panel connector 31 on the side away from the support assembly 2.

[0055] In the above embodiment, the side plate assembly 3 consists of two parts: a side plate body 30 and a side plate connector 31. The side plate connector 31 is made of metal and is fixed to the first base plate 20 of the support assembly 2 by welding. The side plate body 30 is preferably made of high-temperature resistant nylon or carbon fiber. To verify whether the stiffness provided by the high-temperature nylon or carbon fiber side plate in this embodiment is comparable to that of the aluminum profile side plate, a battery module expansion simulation model is established using the finite element method. The simulation results show that the mass of the high-temperature nylon or carbon fiber side plate is reduced by 11.3% compared to the aluminum profile side plate, and the cell expands to 6%. The expansion force decreases by only 1.4%, which can be approximated as the stiffness provided by the high-temperature nylon or carbon fiber side plate being equivalent to that provided by the aluminum profile side plate. The side plate assembly 3 is divided into two independent parts, so that the side plate body 30 is detachably connected to the side plate connector 31 on the side away from the support assembly 2. That is, the connection between the side plate body 30 and the side plate connector 31 is detachable. The side plate connector 31, as an intermediate transition piece, is responsible for firmly fixing the side plate body 30 to the support assembly 2, thereby forming a complete side plate assembly 3 structure, which not only ensures the stability of the structure, but also improves the convenience of assembly and maintenance.

[0056] Reference Figure 1 , Figures 4-5In one embodiment, the side panel body 30 includes a support block 301, a straight plate 302, and a snap-fit ​​plate 303. The straight plate 302 is disposed between the support block 301 and the snap-fit ​​plate 303, and the support block 301, the straight plate 302, and the snap-fit ​​plate 303 are integral parts.

[0057] In the above embodiment, the side panel body 30 is composed of three parts: a support block 301, a straight plate 302, and a snap-fit ​​plate 303. The support block 301 is a solid structure located at the top of the straight plate 302 and extends along the entire length of the straight plate 302. Its height ranges from 12mm to 18mm, and its width ranges from 15mm to 21mm. The straight plate 302 connects the support block 301 and the snap-fit ​​plate 303, playing a connecting role and providing the main load-bearing area for the entire side panel body 30. The snap-fit ​​plate 303 is located at the bottom of the straight plate 302 and also extends along the entire length of the straight plate 302. It is used to connect with the side panel connector 31. The support block 301, straight plate 302, and snap-fit ​​plate 303 are integrated into one piece, reducing the number of parts, reducing assembly complexity, and improving production efficiency and structural strength.

[0058] Furthermore, the side panel connector 31 is provided with a snap-fit ​​groove 312 extending along the entire length, and has an open design at the top and both ends. The snap-fit ​​plate 303 of the side panel body 30 includes a snap-fit ​​body 3030 and an extension 3031. The snap-fit ​​body 3030 is connected to the straight plate 302, while there are two extensions 3031, located at both ends of the snap-fit ​​body 3030, extending a first specified distance in a direction perpendicular to the straight plate 302, so that the straight plate 302 and the snap-fit ​​plate 303 form a T-shaped structure. The side panel connector 31 includes a connecting body 310 and a folded edge 311. The snap-fit ​​groove 312 is formed by the connecting body 310 and the folded edge 311. The connecting body 310 has a U-shaped structure. Its bottom is connected to the support component 2, and the folded edge 311 consists of two parts, which are respectively set on the two sides of the connecting body 310 away from the bottom, and bend and extend into the connecting body 310 by a second specified distance. The first specified distance is equal to the second specified distance, that is, the length of the extended specified distance is 2-6mm. The side plate body 30 is inserted into the snap-fit ​​groove 312 from one end of the side plate connector 31. That is, the straight plate 302 is inserted into the snap-fit ​​groove 312 through the snap-fit ​​plate 303 and connected to the side plate connector 31. The extension part 3031 and the folded edge 311 fit tightly together to realize the snap-fit ​​between the side plate connector 31 and the side plate body 30, ensuring the stability and reliability of the connection and improving the installation efficiency.

[0059] Reference Figure 1 , Figures 4-6In one embodiment, the straight plate 302 includes a first sidewall 3020, a second sidewall 3021 and a plurality of second reinforcing ribs 3022, wherein the first sidewall 3020 and the second sidewall 3021 are arranged opposite to each other, and the plurality of second reinforcing ribs 3022 are spaced apart between the first sidewall 3020 and the second sidewall 3021.

[0060] In the above embodiment, the straight plate 302 is composed of a first side wall 3020, a second side wall 3021 and a plurality of second reinforcing ribs 3022. The first sidewall 3020 and the second sidewall 3021 are the same size and symmetrically arranged, located on the inner and outer sides of the straight plate 302, respectively. The first sidewall 3020 serves as the inner sidewall and is in direct contact with the battery assembly 1, while the second sidewall 3021 serves as the outer sidewall. Multiple second reinforcing ribs 3022 are evenly spaced between the first sidewall 3020 and the second sidewall 3021, extending along the entire length of the first sidewall 3020 and perpendicular to both, forming through holes with open ends between adjacent second reinforcing ribs 3022. The first sidewall 3020, the second sidewall 3021, and the second reinforcing ribs 3022 are integral parts with the same wall thickness, ranging from 1.5mm to 3mm, ensuring the integrity and strength of the structure. The distribution design of the second reinforcing ribs 3022 enhances the overall rigidity and compressive strength of the entire straight plate 302, enabling the straight plate 302 to remain stable under complex working conditions.

[0061] Reference Figures 1-3 In one embodiment, the battery assembly 1 includes a first buffer 11 and a plurality of battery cells 101. The first buffer 11 is disposed on the support assembly 2, and the battery cells 101 are disposed on the side of the first buffer 11 away from the support assembly 2.

[0062] In the above embodiment, the battery assembly 1 consists of two parts: a first buffer 11 and multiple battery cells 101. The battery cells 101 are the core energy storage units of the battery module, responsible for storing and releasing electrical energy. The first buffer 11 is preferably foam. The first buffer 11 is disposed on the first base plate 20 of the support assembly 2, while the battery cells 101 are installed on the side of the first buffer 11 away from the support assembly 2, so that the first buffer 11 is disposed between the battery cells 101 and the first base plate 20 of the support assembly 2. The first buffer 11 is in direct contact with the first base plate 20 of the support assembly 2. Through its elastic properties, it absorbs vibration or impact from below, thereby protecting the battery cells 101 above. This allows the battery cells 101 to be installed stably on the support assembly 2, while avoiding damage caused by external vibration or impact, thus enhancing the stability of the entire battery assembly 1.

[0063] Furthermore, the battery module also includes multiple liquid cooling plates 102, which are key components of the cooling system. They are used to absorb and dissipate the heat generated by the battery cells 101 during operation. The battery cells 101 and the liquid cooling plates 102 are arranged correspondingly, specifically, the length and width of the two are the same. The liquid cooling plates 102 are placed between adjacent battery cells 101 to form an interlaced structure, so that each battery cell 101 can directly contact the liquid cooling plate 102, thereby achieving efficient heat conduction, improving the heat dissipation performance of the entire battery module, and extending its service life.

[0064] Reference Figures 1-3 , Figures 9-12 In one embodiment, the liquid cooling plate 102 is provided with an inlet 103 and an outlet 104 arranged opposite to each other. A liquid cooling baffle 105 is provided inside the liquid cooling plate 102. The liquid cooling baffle 105 is located between the inlet 103 and the outlet 104, and both ends of the liquid cooling baffle 105 extend a specified distance toward the inlet 103 and the outlet 104, respectively.

[0065] In the above embodiment, an inlet 103 and an outlet 104 are provided on the liquid cooling plate 102, arranged opposite to each other at both ends of the liquid cooling plate 102, for the inflow and outflow of coolant. A liquid cooling baffle 105 is also provided inside the liquid cooling plate 102, located on the connecting line between the inlet 103 and the outlet 104. The length of the liquid cooling baffle 105 is less than the length of the connecting line between the inlet 103 and the outlet 104, and both ends of the baffle extend a specified distance toward the inlet 103 and the outlet 104, respectively. The liquid cooling baffle 105 is closer to the inlet 103. A first distance is formed between one end and the inlet 103, and a second distance is formed between the end near the outlet 104 and the outlet 104. Preferably, the first distance is equal to the second distance. After the coolant enters from the inlet 103, it flows along the path divided by the liquid cooling baffle 105, which increases the flow rate of the coolant. Finally, it is discharged from the outlet 104, ensuring that the coolant can fully cover the internal area of ​​the liquid cooling plate 102, thereby improving the heat dissipation efficiency. In addition, the liquid cooling baffle 105 is used to strengthen the upper and lower layers of the liquid cooling plate 102, reduce deformation, and improve the structural strength of the entire liquid cooling plate 102.

[0066] Reference Figure 1 In one embodiment, the battery module further includes a pressure plate assembly 4 and a second buffer 5. The second buffer 5 is disposed on the side of the battery module 1 away from the support assembly 2, and the pressure plate assembly 4 is disposed on the side of the second buffer 5 away from the battery module 1. The pressure plate assembly 4 is connected to the side plate assembly 3.

[0067] In the above embodiment, the battery module structure includes a pressure plate assembly 4 and a second buffer 5. The second buffer 5 is preferably foam and is disposed on the side of the battery assembly 1 away from the support assembly 2. The pressure plate assembly 4 is located on the side of the second buffer 5 away from the battery assembly 1 and is connected to the support block 301 of the side plate assembly 3 by bolts. The width and length of the pressure plate assembly 4 are the same as those of the support assembly 2 to ensure that it can cover the entire top area of ​​the battery assembly 1. The battery assembly 1, the second buffer 5, and the pressure plate assembly 4 are stacked in sequence to form a stable multi-layer structure. The second buffer 5 is in direct contact with the battery assembly 1 and absorbs external vibrations through its elastic properties, reducing the impact on the battery assembly 1. The pressure plate assembly 4 is located on the outermost layer and is firmly connected to the support block 301 of the side plate assembly 3 by bolts, thereby firmly fixing the entire battery assembly 1 between the support assembly 2 and the side plate assembly 3. This not only enhances the stability of the overall structure but also provides additional protection for the battery assembly 1.

[0068] Reference Figure 1 , Figure 7 In one embodiment, the second buffer 5 includes a first buffer layer 50, a second buffer layer 51, and a third buffer layer 52 stacked sequentially from the battery assembly 1 toward the pressure plate assembly 4, and the areas of the first buffer layer 50, the second buffer layer 51, and the third buffer layer 52 decrease from the battery assembly 1 toward the pressure plate assembly 4.

[0069] In the above embodiment, the second buffer 5 is composed of a first buffer layer 50, a second buffer layer 51, and a third buffer layer 52. The first buffer layer 50, the second buffer layer 51, and the third buffer layer 52 are stacked sequentially from the battery assembly 1 toward the pressure plate assembly 4. The first buffer layer 50 is in direct contact with the battery cell 101 of the battery assembly 1. The second buffer layer 51 is located between the first buffer layer 50 and the third buffer layer 52, while the third buffer layer 52 is in contact with the pressure plate assembly 4. The first buffer layer 50, the second buffer layer 51, and the third buffer layer 52 are integrated. At the same time, the area of ​​the first buffer layer 50, the second buffer layer 51, and the third buffer layer 52 decreases from the battery assembly 1 toward the pressure plate assembly 4, forming a stepped structure. This allows the second buffer 5 to better adapt to force distribution in different directions, which not only improves the shock resistance of the battery module but also enhances the stability and service life of the entire battery module.

[0070] Reference Figure 1 , Figure 8 In one embodiment, the pressure plate assembly 4 includes a first pressure plate 40 and a second pressure plate 41. The second pressure plate 41 is disposed on the side of the first pressure plate 40 away from the second buffer member 5, and a plurality of third reinforcing ribs 42 protruding in a direction away from the first pressure plate 40 are provided on the second pressure plate 41.

[0071] In the above embodiment, the pressure plate assembly 4 is composed of a first pressure plate 40 and a second pressure plate 41. The first pressure plate 40 is a straight plate 302 structure and directly contacts the second buffer member 5. The second pressure plate 41 is located on the side of the first pressure plate 40 away from the second buffer member 5 and is connected to the first pressure plate 40 by adhesive. At the same time, multiple third reinforcing ribs 42 protruding away from the first pressure plate 40 are provided on the second pressure plate 41. These reinforcing ribs have a convex structure, so that the second pressure plate 41 presents a convex shape as a whole. The second pressure plate 41 is located outside the first pressure plate 40. The third reinforcing ribs 42 on it enhance the compressive strength and structural stability, so that the pressure plate assembly 4 can maintain its shape when subjected to large external pressure, thereby improving battery cycle and extending battery life.

[0072] This utility model also proposes a battery pack, including the battery module described in any of the above embodiments. The battery pack also includes a side beam and a cover. The side beam is disposed on the support assembly and extends along the entire circumference of the support assembly 2, thus adding a ring of side beams to the support assembly 2. The cover is disposed on the top of the side beam, so that the cover closes on the battery module and is connected to the side beam. This eliminates the need for a traditional mounting plate, reduces the lateral space occupied, and the support assembly 2 serves as the bottom plate of the battery pack. The side plate assembly 3 is arranged adjacent to the support assembly 2, providing more layout space for other components in the battery pack, improving the overall space utilization and energy density of the battery pack, reducing assembly complexity, improving production efficiency, and further reducing manufacturing costs.

[0073] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A battery module, characterized by, The battery module comprises a battery assembly, a support assembly and a side plate assembly; The battery assembly is arranged on the support assembly, the support assembly is used as a bottom plate of the battery pack, and the side plate assembly is arranged adjacent to the side edge of the support assembly provided with the battery assembly and connected with the support assembly.

2. The battery module of claim 1, wherein, The support assembly comprises a first bottom plate, a second bottom plate and a plurality of first reinforcing ribs, the first bottom plate and the second bottom plate are arranged oppositely, and the plurality of first reinforcing ribs are arranged at intervals between the first bottom plate and the second bottom plate.

3. The battery module of claim 1, wherein, The side plate assembly comprises a side plate body and a side plate connector, the side plate connector is connected on the support assembly, and the side plate body is detachably connected on the side of the side plate connector away from the support assembly.

4. The battery module of claim 3, wherein, The side plate body comprises a support block, a straight plate and a clamping plate, the straight plate is arranged between the support block and the clamping plate, and the support block, the straight plate and the clamping plate are an integral piece.

5. The battery module of claim 4, wherein, The side plate connector is provided with a clamping groove, and the straight plate is connected with the side plate connector by being inserted into the clamping groove through the clamping plate.

6. The battery module of claim 4, wherein, The straight plate comprises a first side wall, a second side wall and a plurality of second reinforcing ribs, the first side wall and the second side wall are arranged oppositely, and the plurality of second reinforcing ribs are arranged at intervals between the first side wall and the second side wall.

7. The battery module of claim 1, wherein, The battery assembly comprises a first buffer and a plurality of battery monomers, the first buffer is arranged on the support assembly, and the battery monomers are arranged on the side of the first buffer away from the support assembly.

8. The battery module of claim 7, wherein, The battery module further comprises a plurality of liquid cooling plates, the battery monomers are arranged correspondingly to the liquid cooling plates, and the liquid cooling plates are arranged between adjacent battery monomers.

9. The battery module of claim 8, wherein, The liquid cooling plate is provided with an inlet and an outlet arranged oppositely, the liquid cooling plate is provided with a liquid cooling partition plate, the liquid cooling partition plate is located between the inlet and the outlet, and the two ends of the liquid cooling partition plate extend towards the inlet and the outlet by a specified distance respectively.

10. The battery module of claim 1, wherein, The battery module further comprises a pressing plate assembly and a second buffer, the second buffer is arranged on the side of the battery assembly away from the support assembly, the pressing plate assembly is arranged on the side of the second buffer away from the battery assembly, and the pressing plate assembly is connected with the side plate assembly.

11. The battery module of claim 10, wherein, The second buffer comprises a first buffer layer, a second buffer layer and a third buffer layer stacked in sequence from the battery assembly to the pressing plate assembly, and the areas of the first buffer layer, the second buffer layer and the third buffer layer decrease from the battery assembly to the pressing plate assembly.

12. The battery module of claim 10, wherein, The pressing plate assembly comprises a first pressing plate and a second pressing plate, the second pressing plate is arranged on the side of the first pressing plate away from the second buffer, and a plurality of third reinforcing ribs are arranged on the second pressing plate and protrude away from the first pressing plate.

13. A battery pack, characterized by The battery module comprises the battery module of any one of claims 1-12, further comprising a side beam and a box cover, the side beam is arranged on the support assembly, and the box cover is arranged on the battery module and connected with the side beam.

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