Battery pack

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery pack which comprises a box body, a plurality of battery cell stacking bodies and a plurality of pressing plates corresponding to the battery cell stacking bodies, a plurality of cold plates are arranged in the box body, a battery cell stacking body bin is formed between every two adjacent cold plates, and the battery cell stacking bodies are arranged in the battery cell stacking body bins; and the pressing plate is arranged at the top of the battery cell stacking body and is connected to the adjacent cold plate in a buckling manner. According to the utility model, the buckle is used for connecting the pressing plate and the cold plate, so that the assembly process of the battery pack can be simplified, tools and operation steps required during installation are reduced, the production efficiency and the assembly speed are improved, and as fasteners such as bolts and nuts and related installation tools are omitted, the material and tool cost is obviously reduced, and the production cost is reduced. And meanwhile, the maintenance work required by looseness or damage of the bolt is reduced, so that the maintenance cost is reduced, and the maintenance time is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and particularly relates to a battery pack. Background Art

[0002] In order to cope with the expansion of the battery stack during the use of the product in the existing battery system, a pressing plate is usually used to apply a pre-tightening force to the battery stack. The pressing plate and the cold plate are generally fastened by bolts. However, the size of the power battery is generally relatively large, and the number of bolts required to fasten the pressing plate to the cold plate by bolts is relatively large. Therefore, it takes more time to complete the connection between the pressing plate and the cold plate during the product production process, which increases the complexity of the assembly process, easily leads to the risk of assembly errors or inconsistencies, reduces the production efficiency, and increases the production cost. Summary of the Utility Model

[0003] The main purpose of the utility model is to provide a battery pack, aiming to solve the technical problem that a relatively large number of bolts are required to fasten the pressing plate to the cold plate by bolts and more time is required for assembly.

[0004] To achieve the above-mentioned utility model purpose, the utility model provides a battery pack, which includes a box body, a plurality of battery stacks, and a plurality of pressing plates corresponding to the battery stacks;

[0005] A plurality of cold plates are arranged in the box body, and a battery stack bin is formed between adjacent cold plates, and the battery stack is arranged in the battery stack bin;

[0006] The pressing plate is arranged on the top of the battery stack and is snap-connected to adjacent cold plates.

[0007] Further, the cold plate includes a cold plate main body and a cold plate snap portion. The cold plate main body is fixedly connected to the box body. The cold plate snap portion is arranged at one end of the cold plate main body away from the bottom plate of the box body, and a card slot is arranged between the cold plate main body and the cold plate snap portion.

[0008] Further, the card slot includes a first card slot and a second card slot oppositely arranged to the first card slot, and the first card slot and the second card slot respectively extend along the entire thickness direction of the cold plate main body.

[0009] Further, a connecting portion is formed between the first card slot and the second card slot for connecting the cold plate main body and the cold plate snap portion.

[0010] Further, an inclined surface is arranged on the side of the cold plate snap portion, and the vertical height of the inclined surface gradually decreases from the top to the bottom.

[0011] Further, the inclined surface includes a first inclined surface and a second inclined surface disposed opposite to the first inclined surface, and the first inclined surface and the second inclined surface respectively extend along the entire length direction of the cold plate buckle portion.

[0012] Further, the pressing plate includes a pressing plate main body and pressing plate bending portions provided on opposite sides of the pressing plate main body, and the pressing plate bending portions are bent upward away from the battery cell stack.

[0013] Further, the pressing plate bending portion is rectangular, the pressing plate bending portions are located on the long opposite sides of the pressing plate main body, and the pressing plate bending portions extend along the entire length direction of the pressing plate main body.

[0014] Further, a groove is provided in the card slot, and the groove is located on the side wall of the card slot near one end of the cold plate buckle portion and corresponds to the top of the pressing plate bending portion.

[0015] Further, the battery pack further includes a box cover, the box cover is disposed on a side of the pressing plate away from the battery cell stack, and a plurality of first through holes are provided on the edge of the box cover, and a second through hole corresponding to the first through hole is provided at one end of the frame of the box body away from the bottom plate of the box body. The box cover is connected to the box body by a second bolt passing through the first through hole and the second through hole.

[0016] Beneficial effects:

[0017] A battery pack of the present utility model includes a box body, a plurality of battery cell stacks, and a plurality of pressing plates corresponding to the battery cell stacks; a plurality of cold plates are provided in the box body, and a battery cell stack bin is formed between adjacent cold plates, and the battery cell stack is disposed in the battery cell stack bin; the pressing plate is disposed on the top of the battery cell stack and is snap-connected to adjacent cold plates. Therefore, using snap connection between the pressing plate and the cold plate can simplify the assembly process of the battery pack, reduce the tools and operation steps required during installation, improve the production efficiency and assembly speed, and since bolts, nuts and other fasteners, as well as related installation tools are omitted, the material and tool costs are significantly reduced, and at the same time, the maintenance work required due to bolt loosening or damage is reduced, thereby reducing the maintenance cost and time. Description of the drawings

[0018] Figure 1 is a schematic diagram of the overall structure of the battery pack according to an embodiment of the present utility model;

[0019] Figure 2 is an embodiment of the present utility model Figure 1 partial enlarged view of A;

[0020] Figure 3 Partial enlarged view of the C part of Figure 1 in one embodiment of the present utility model;

[0021] Figure 4 Partial enlarged view of the D part of Figure 1 in one embodiment of the present utility model;

[0022] Figure 5 Top view of the battery pack in one embodiment of the present utility model;

[0023] Figure 6 A - A sectional view of Figure 5 in one embodiment of the present utility model;

[0024] Figure 7 Partial enlarged view of the F part of Figure 6 in one embodiment of the present utility model;

[0025] Figure 8 Front view of the pressing plate in one embodiment of the present utility model.

[0026] Wherein:

[0027] 1. Box body; 2. Cold plate; 3. Stacked cell body; 4. Pressing plate; 5. Box cover; 7. Second through - hole; 8. Second bolt; 9. Reinforcing rib;

[0028] 10. Bottom plate; 11. Frame;

[0029] 20. Cold plate main body; 21. Cold plate buckle part; 22. Card slot; 23. Inclined surface; 25. Connection part;

[0030] 220. First card slot; 221. Second card slot; 222. Groove;

[0031] 230. First inclined surface; 231. Second inclined surface;

[0032] 40. Pressing plate main body; 41. Pressing plate bending part;

[0033] 410. First pressing plate bending part; 411. Second pressing plate bending part.

[0034] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0035] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0036] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically and clearly defined.

[0037] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0038] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0039] Referring to Figures 1 - 2 , this embodiment provides a battery pack, which includes a box body 1, a plurality of battery cell stacks 3, and a plurality of pressing plates 4 corresponding to the battery cell stacks 3;

[0040] A plurality of cold plates 2 are arranged in the box body 1, and a battery cell stack bin is formed between adjacent cold plates 2, and the battery cell stack 3 is arranged in the battery cell stack bin;

[0041] The pressing plate 4 is arranged on the top of the battery cell stack 3 and is snap-connected to the adjacent cold plate 2.

[0042] In the above embodiment, the battery pack includes a box body 1, a plurality of battery cell stacks 3 and a plurality of pressing plates 4. The battery cell stacks 3 and the pressing plates 4 are arranged corresponding to each other. The plurality of battery cell stacks 3 are stacked to form a battery cell stack body. A plurality of cold plates 2 are arranged in the box body 1, and the plurality of cold plates 2 are arranged in the box body 1 at a certain interval, so that a battery cell stack bin is formed between adjacent cold plates 2. Then, the battery cell stack 3 is placed in the battery cell stack bin. The pressing plate 4 is arranged at one end of the battery cell stack 3 away from the bottom plate 10 of the box body 1, so that the pressing plate 4 is located on the top of the battery cell stack 3 and completely covers the top end face of the battery cell stack 3. At the same time, after the pressing plate 4 is placed on the top of the battery cell stack 3, the adjacent cold plate 2 and the pressing plate 4 are connected together in a snap-connection manner. Therefore, connecting the pressing plate 4 and the cold plate 2 together by means of snap connection can simplify the assembly process of the battery pack, reduce the tools and operation steps required during installation, improve the production efficiency and assembly speed, and since bolts, nuts and other fasteners, as well as related installation tools, are omitted, the material and tool costs are significantly reduced. At the same time, the maintenance work required due to bolt loosening or damage is reduced, thereby reducing the maintenance cost and time.

[0043] Refer to Figures 1 - 2 As shown in, in one embodiment, the cold plate 2 includes a cold plate main body 20 and a cold plate snap portion 21. The cold plate main body 20 is fixedly connected in the box body 1. The cold plate snap portion 21 is arranged at one end of the cold plate main body 20 away from the bottom plate 10 of the box body 1, and a slot 22 is arranged between the cold plate main body 20 and the cold plate snap portion 21.

[0044] In the above embodiments, the cold plate 2 includes a cold plate main body 20 and a cold plate buckle portion 21. The box body 1 includes a bottom plate 10 and a frame 11 provided at the edge of the bottom plate 10 and extending along the entire perimeter direction of the bottom plate 10, so that an accommodation cavity is formed by enclosing the bottom plate 10 and the frame 11. The cold plate 2 is disposed in the accommodation cavity. The box body 1 is preferably rectangular, and the cold plate 2 is also preferably rectangular. The cold plate main body 20 is connected to the cold plate buckle portion 21. One long side of the cold plate main body 20 away from the cold plate buckle portion 21 is fixedly connected to the bottom plate 10 by bolts, and the two short opposite sides of the cold plate main body 20 are respectively connected to the two long side frames 11 of the box body 1. In addition, the cold plate buckle portion 21 is disposed at one end of the cold plate main body 20 away from the bottom plate 10, and the cold plate main body 20 and the cold plate buckle portion 21 are an integral part, effectively reducing the possible looseness or movement between the cold plate main body 20 and the cold plate buckle portion 21, and making the entire cold plate 2 structure have stronger stability. A groove 22 recessed towards the inside of the cold plate 2 is provided at the connection between the cold plate main body 20 and the cold plate buckle portion 21, so that the pressing plate 4 is snap-connected to the cold plate 2 through the groove 22. Through the design of the recessed groove 22, it can effectively prevent the pressing plate 4 from accidentally falling off or moving during use, and enhance the reliability of the connection between the entire pressing plate 4 and the cold plate 2.

[0045] Referring to Figures 1 - 2 , in one embodiment, the groove 22 includes a first groove 220 and a second groove 221 disposed opposite to the first groove 220, and the first groove 220 and the second groove 221 respectively extend along the entire thickness direction of the cold plate main body 20.

[0046] In the above embodiments, the groove 22 includes a first groove 220 and a second groove 221, and the first groove 220 and the second groove 221 are in a relatively disposed state, so that the first groove 220 and the second groove 221 are respectively located on both sides of the connection between the cold plate main body 20 and the cold plate buckle portion 21. At the same time, the first groove 220 extends a specified distance towards the direction of the second groove 221, and the second groove 221 also extends the same specified distance towards the direction of the first groove 220 at the same time, so that the depths of the first groove 220 and the second groove 221 are the same. The first groove 220 and the second groove 221 respectively extend along the entire thickness direction of the cold plate main body 20. When the pressing plate 4 is snap-connected to the cold plate 2 through the first groove 220 and the second groove 221, the first groove 220 and the second groove 221 can provide uniform connection and fixing force within the entire length range of the cold plate 2, enhancing the stability and reliability of the connection between the cold plate 2 and the pressing plate 4.

[0047] Further, a connecting portion 25 is formed between the first card slot 220 and the second card slot 221, and the connecting portion 25 is located at the middle position of the connection between the cold plate main body 20 and the cold plate buckle portion 21. The connecting portion 25 connects the cold plate main body 20 and the cold plate buckle portion 21, so that the whole cold plate 2 forms an I-shaped structure. Through the I-shaped structure, the loads of the adjacent pressing plates 4 respectively buckled and connected in the oppositely arranged first card slot 220 and second card slot 221 can be effectively dispersed, and the structural strength and stability of the whole cold plate 2 are improved.

[0048] Referring to Figures 1 - 2 , in an embodiment, an inclined surface 23 is provided on the side of the cold plate buckle portion 21, and the vertical height of the inclined surface 23 gradually decreases from the top to the bottom.

[0049] In the above embodiment, an inclined surface 23 is provided on the side in the length direction of the cold plate buckle portion 21, and the inclined surface 23 is located at the distance from the end of the cold plate buckle portion 21 away from the cold plate main body 20 to the end of the cold plate buckle portion 21 close to the cold plate main body 20, that is, the height from the top to the bottom of the inclined surface 23. The height gradually decreases from the end of the cold plate buckle portion 21 away from the cold plate main body 20 to the end of the cold plate buckle portion 21 close to the cold plate main body 20, that is, the vertical height from the top to the bottom of the inclined surface 23 gradually decreases from the top to the bottom, so that the inclined surface 23 is inclined towards the cell stack bin. When the pressing plate 4 is placed on the top of the cell stack 3 and applies a downward force to be buckled and connected in the card slot 22, the pressing plate 4 can be guided by the inclined surface 23 during the insertion process, so as to more easily align and enter the card slot 22, effectively simplifying the assembly process of the pressing plate 4, without excessive force or additional auxiliary tools, and saving the assembly time and process complexity on the production line.

[0050] Referring to Figures 1 - 2 , in an embodiment, the inclined surface 23 includes a first inclined surface 230 and a second inclined surface 231 oppositely arranged with the first inclined surface 230, and the first inclined surface 230 and the second inclined surface 231 respectively extend along the whole length direction of the cold plate buckle portion 21.

[0051] In the above embodiments, the inclined surface 23 includes a first inclined surface 230 and a second inclined surface 231, and the first inclined surface 230 and the second inclined surface 231 are disposed opposite to each other, such that the first inclined surface 230 and the second inclined surface 231 are respectively located on the two long opposite sides of the cold plate buckle portion 21. At the same time, the first inclined surface 230 and the second inclined surface 231 respectively extend along the entire length direction of the cold plate buckle portion 21, thereby providing a clear guiding path for the pressing plate 4. In this way, when the pressing plate 4 contacts the cold plate buckle portion 21, the first inclined surface 230 and the second inclined surface 231 will guide the pressing plate 4 to naturally align with the card slot 22, ensuring an accurate installation position, and making the cold plate buckle portion 21 form an isosceles trapezoid structure. Therefore, the symmetry of the first inclined surface 230 and the second inclined surface 231 on the two long sides of the cold plate buckle portion 21 effectively improves the ability of the entire cold plate buckle portion 21 to resist torsion and bending.

[0052] Referring to Figure 1 , Figure 8 , in one embodiment, the pressing plate 4 includes a pressing plate main body 40, and pressing plate bending portions 41 provided on the two opposite sides of the pressing plate main body 40, and the pressing plate bending portions 41 are bent upward away from the battery cell stack 3.

[0053] In the above embodiments, the pressing plate 4 includes a pressing plate main body 40 and pressing plate bending portions 41. The pressing plate main body 40 is connected to the pressing plate bending portions 41, and the pressing plate bending portions 41 are provided on the two opposite sides of the pressing plate main body 40, and the pressing plate main body 40 and the pressing plate bending portions 41 are integrally formed, such that the pressing plate main body 40 and the pressing plate bending portions 41 are continuously connected without separated interfaces or welding points. Therefore, the entire structure of the pressing plate 4 is more robust and stable, reducing structural weaknesses caused by loosening of interfaces or connections, and improving the durability and reliability of the pressing plate 4. Additionally, the pressing plate bending portions 41 are bent relative to the pressing plate main body 40, such that the bending arc length of the end of the pressing plate 4 away from the battery cell stack 3 is smaller than the bending arc length of the end of the pressing plate 4 close to the battery cell stack 3. That is, when the pressing plate 4 is placed on the top of the battery cell stack 3, the bending direction of the pressing plate bending portions 41 is that the pressing plate bending portions 41 are bent upward away from the battery cell stack 3. When the pressing plate 4 is placed on the top of the battery cell stack 3 and the pressing plate 4 is clamped in the card slot 22 through the pressing plate bending portions 41, the pressing plate bending portions 41 can be tightly clamped in the card slot 22, which helps to prevent accidental movement or loosening of the entire pressing plate 4 during vibration or movement, providing a more stable connection for the connection between the entire pressing plate 4 and the cold plate 2.

[0054] Referring to Figure 1 , Figure 8 , in one embodiment, the pressing plate bending portions 41 are rectangular, the pressing plate bending portions 41 are located on the two long opposite sides of the pressing plate main body 40, and the pressing plate bending portions 41 extend along the entire length direction of the pressing plate main body 40.

[0055] In the above embodiment, the pressing plate bending portion 41 is preferably rectangular, and the pressing plate bending portion 41 is located on the long opposite sides of the pressing plate body 40, so that the pressing plate bending portion 41 includes a first pressing plate bending portion 410 and a second pressing plate bending portion 411, and the first pressing plate bending portion 410 and the second pressing plate bending portion 411 are in a relatively arranged state, and the first pressing plate bending portion 410 and the second pressing plate bending portion 411 respectively extend along the entire length direction of the pressing plate body 40, and the first pressing plate bending portion 410 and the second pressing plate bending portion 411 are bent upward in a direction away from the battery cell stack 3. The height of the first pressing plate bending portion 410 and the second pressing plate bending portion 411 are kept consistent. When the pressing plate 4 is snap-connected to the slot 22 of the adjacent cold plate 2 through the first pressing plate bending portion 410 and the second pressing plate bending portion 411, the connection points of the first pressing plate bending portion 410 and the second pressing plate bending portion 411 in the slot 22 are evenly distributed, which helps to disperse and balance the stress at the connection point, thereby avoiding local stress concentration.

[0056] Reference Figures 1 - 2 , Figures 5 - 8 In one embodiment, a groove 222 is provided in the slot 22 , and the groove 222 is located on a side wall of the slot 22 close to one end of the cold plate buckle portion 21 and corresponds to the top of the pressing plate bending portion 41 .

[0057] In the above embodiment, a groove 222 is provided in the slot 22, and the groove 222 is provided on the side wall of the slot 22 close to one end of the cold plate buckle portion 21, so that the groove 222 is recessed on the side wall toward the cold plate buckle portion 21, and the groove 222 is preferably L-shaped, and is preferably provided at one end of the side wall close to the inclined surface 23, and at the same time, the groove 222 corresponds to the bent top of the pressure plate bending portion 41, so that when the pressure plate bending portion 41 is clamped in the slot 22, the bent top of the pressure plate bending portion 41 is clamped in the groove 222. Therefore, the cooperation between the groove 222 and the bent top of the pressure plate bending portion 41 increases the stability of the clamping of the pressure plate 4 and the cold plate 2, and reduces the shaking of the pressure plate bending portion 41 in the slot 22.

[0058] Reference Figure 1 , Figure 3 , Figure 4 In one embodiment, the battery pack further comprises a box cover 5, wherein the box cover 5 is arranged on a side of the pressure plate 4 away from the battery cell stack 3, and a plurality of first through holes are arranged on an edge of the box cover 5, and a second through hole 7 corresponding to the first through hole is arranged at an end of the frame 11 of the box body 1 away from the bottom plate 10 of the box body 1, and the box cover 5 is connected to the box body 1 by a second bolt 8 penetrating the first through hole and the second through hole 7.

[0059] In the above embodiments, the battery pack further includes a case cover 5, wherein the case cover 5 is disposed on the side of the pressing plate 4 away from the battery cell stack 3, and a plurality of first through holes are provided on the edge of the case cover 5, and the plurality of first through holes are arranged uniformly along the entire circumferential direction of the case cover 5 at a specified interval. In addition, a plurality of second through holes 7 are provided on the frame 11 of the case 1, and the first through holes and the second through holes 7 are arranged corresponding to each other, so that the second through holes 7 are also arranged uniformly along the entire circumferential direction of the frame 11 at a specified interval. Therefore, when the pressing plate 4, the battery cell stack 3, and the cold plate 2 are disposed in the accommodating cavity of the case 1, the second bolts 8 pass through the first through holes and the second through holes 7 to connect the case cover 5 to the case 1, so that the case cover 5 is stably fixed on the case 1, effectively preventing the case cover 5 from loosening or falling off under vibration or accidental impact, thereby improving the overall structural stability and safety of the entire battery pack, and ensuring a tight connection between the case cover 5 and the case 1, preventing dust, moisture, or other contaminants in the external environment from entering the internal space of the battery pack, and protecting the battery components from damage.

[0060] Referring to Figure 1 , Figure 3 , Figure 4 , in one embodiment, a plurality of reinforcing ribs 9 are provided on the case cover 5 and are arranged in an array, and the reinforcing ribs 9 protrude away from the case 1.

[0061] In the above embodiments, a plurality of reinforcing ribs 9 are provided on the case cover 5. Preferably, the reinforcing ribs 9 are diamond-shaped, and the plurality of reinforcing ribs 9 are arranged in an array on the case cover 5. Since the diamond structure provides balanced support in multiple directions, the case cover 5 can distribute stress more evenly when subjected to external forces or pressures, thereby reducing the risk of deformation and breakage, effectively increasing the overall strength and stiffness of the case cover 5. In addition, the reinforcing ribs 9 protrude away from the case 1. The protruding reinforcing ribs 9 can provide additional support and protection when the case cover 5 is subjected to vibration or impact, effectively absorbing and dispersing vibration energy, and reducing the possibility of vibration being transmitted to the inside of the battery pack.

[0062] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural or equivalent process transformation made by using the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. A battery pack, characterized in that: It includes a box body and a plurality of battery cell stacks, and a plurality of pressing plates corresponding to the battery cell stacks; A plurality of cold plates are arranged in the box body, and a battery cell stacking bin is formed between adjacent cold plates, and the battery cell stack is arranged in the battery cell stacking bin; The pressing plate is arranged on the top of the battery cell stack and is snap-connected to the adjacent cold plate.

2. The battery pack according to claim 1, characterized in that: The cold plate includes a cold plate body and a cold plate buckle part. The cold plate body is fixedly connected to the box body. The cold plate buckle part is arranged at one end of the cold plate body away from the bottom plate of the box body, and a slot is arranged between the cold plate body and the cold plate buckle part.

3. The battery pack according to claim 2, characterized in that: The card slot includes a first card slot and a second card slot arranged opposite to the first card slot, and the first card slot and the second card slot extend along the entire thickness direction of the cold plate body respectively.

4. The battery pack according to claim 3, characterized in that: A connecting portion is formed between the first clamping slot and the second clamping slot for connecting the cold plate body and the cold plate buckle portion.

5. The battery pack according to claim 2, characterized in that: An inclined surface is arranged on the side of the cold plate buckle portion, and the vertical height of the inclined surface gradually decreases from the top to the bottom.

6. The battery pack according to claim 5, characterized in that: The inclined surface includes a first inclined surface and a second inclined surface arranged opposite to the first inclined surface, and the first inclined surface and the second inclined surface extend along the entire length direction of the cold plate buckle portion respectively.

7. The battery pack according to claim 2, characterized in that: The pressing plate includes a pressing plate body and pressing plate bending parts arranged on two opposite sides of the pressing plate body, and the pressing plate bending parts are bent upward in a direction away from the battery cell stack.

8. The battery pack according to claim 7, characterized in that: The bending portion of the pressing plate is rectangular, is located on two long opposite sides of the pressing plate body, and extends along the entire length direction of the pressing plate body.

9. The battery pack according to claim 7, characterized in that: A groove is arranged in the slot, and the groove is located on a side wall of the slot close to one end of the cold plate buckle portion and corresponds to the top of the bending portion of the pressing plate.

10. The battery pack according to claim 1, characterized in that: The battery pack also includes a box cover, which is arranged on a side of the pressure plate away from the battery cell stack, and a plurality of first through holes are arranged on an edge of the box cover, and second through holes corresponding to the first through holes are arranged at an end of the frame of the box away from the bottom plate of the box, and the box cover is connected to the box by a second bolt penetrating the first through hole and the second through hole.

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