Battery pack upper cover and battery pack

Abstract

The utility model provides a battery pack upper cover and a battery pack. The battery pack upper cover comprises an upper cover body which is provided with a first mounting opening; the upper cover convex hull is provided with a containing cavity, a second mounting opening and a third mounting opening, the second mounting opening and the third mounting opening are communicated with the containing cavity, the upper cover convex hull is arranged on the upper cover body, and the second mounting opening corresponds to the first mounting opening; the fire-fighting assembly is arranged on the upper cover body, and the fire-fighting assembly is connected with the upper cover convex hull through the third mounting opening; and the hardness of the upper cover body is greater than that of the upper cover convex hull. The battery pack upper cover solves the problem of poor use performance of the battery pack upper cover in the prior art.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, specifically, relate to a battery pack upper cover and battery pack. BACKGROUND

[0002] As one of the core components of electric vehicles, power batteries cannot be ignored in terms of high temperature, water and even impact to protect the safety of the battery. To protect the safety of the battery, the battery shell, i.e. the battery pack, is the most important. The battery pack is usually composed of an upper cover and a lower box body. In order to meet the requirements of economy and sustainable development in mass production, the most commonly used upper cover on the current market is steel.

[0003] The use of steel to manufacture the upper cover is generally realized by the following two schemes: 1. Using high-strength steel stamping in whole, which has high mechanical strength but poor formability and cannot be deep-drawn, making it difficult to cope with complex envelope design of the upper cover; 2. Using steel with good elongation in whole, which can be deep-drawn and can realize complex envelope design of the upper cover, but has relatively low mechanical strength and poorer safety.

[0004] In addition, when the battery experiences thermal runaway, the battery rapidly heats up in a very short time, and if not timely suppressed, it may even cause a fire, explosion and other serious accidents that threaten personnel safety. The current thermal runaway suppression measures are usually passive protection, i.e. slowing down the spread of fire through the flame retardant properties of the material, which has limited control ability over the fire.

[0005] Therefore, there is a problem of poor performance of the battery pack upper cover in the prior art. SUMMARY

[0006] The main purpose of the utility model is to provide a battery pack upper cover and a battery pack to solve the problem of poor performance of the battery pack upper cover in the prior art.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a battery pack upper cover is provided, which comprises: an upper cover body having a first mounting opening; an upper cover protrusion having a receiving cavity and a second mounting opening and a third mounting opening respectively communicating with the receiving cavity, the upper cover protrusion being arranged on the upper cover body, and the second mounting opening being arranged corresponding to the first mounting opening; a fire-fighting assembly arranged on the upper cover body and connected with the upper cover protrusion through the third mounting opening; and the hardness of the upper cover body is greater than that of the upper cover protrusion.

[0008] Further, the periphery of the first mounting opening and / or the periphery of the second mounting opening is provided with a welded flange.

[0009] Further, the surface of the side of the upper cover body facing the upper cover protrusion and / or the outer surface of the upper cover protrusion is provided with at least one reinforcing rib.

[0010] Further, the reinforcing rib is a "rice" shaped reinforcing rib.

[0011] Further, the fire-fighting assembly comprises a liquid storage tank, which is detachably arranged on the upper cover body, has a fire-fighting nozzle, and is in openable and closable communication with the third mounting opening through the fire-fighting nozzle; and an electrical interface, which is arranged on the liquid storage tank.

[0012] Further, the fire-fighting assembly further comprises a mounting seat, the liquid storage tank is arranged on the mounting seat and detachably connected with the upper cover body through the mounting seat.

[0013] Further, the liquid storage tank is provided with a mounting flange corresponding to the upper cover body, and the liquid storage tank is detachably connected with the upper cover body through the mounting flange.

[0014] Further, the upper cover body further comprises a fixing block, and the fire-fighting assembly is arranged on the fixing block.

[0015] Further, the fixing block is arranged along the periphery of the first mounting opening.

[0016] According to another aspect of the present application, a battery pack is provided, comprising the battery pack upper cover.

[0017] The battery pack upper cover in the present application comprises an upper cover body, an upper cover convex block and a fire-fighting assembly. The upper cover body has a first mounting opening; the upper cover convex block has a receiving cavity and a second mounting opening and a third mounting opening in communication with the receiving cavity respectively, and the upper cover convex block is arranged on the upper cover body, and the second mounting opening is arranged corresponding to the first mounting opening; the fire-fighting assembly is arranged on the upper cover body, and the fire-fighting assembly is connected with the upper cover convex block through the third mounting opening; and the hardness of the upper cover body is greater than the hardness of the upper cover convex block.

[0018] When the battery pack upper cover in the present application is used, since the battery pack upper cover has the upper cover body and the upper cover convex block, the split type design of the battery pack upper cover can be realized. In the present application, the main function of the upper cover convex block is to arrange part of components in the thickness direction of the battery pack when the space inside the battery pack is insufficient, at which time the receiving cavity can be formed by the upper cover convex block to expand the space. In addition, the hardness of the upper cover body 10 is greater than the hardness of the upper cover convex block 20, so that the battery pack upper cover can meet the demand of use strength and ensure that part of the battery pack upper cover has good elongation, so as to ensure the safety performance of the battery pack and cope with complex upper cover design. At the same time, since the battery pack upper cover in the present application further has the fire-fighting assembly, the heat runaway can be actively inhibited, so the present application has the characteristic of actively protecting the battery pack compared with the battery pack upper cover in the prior art. Therefore, the battery pack upper cover in the present application effectively solves the problem of poor use performance of the battery pack upper cover in the prior art. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0020] Figure 1 A schematic diagram of the structure of the battery pack cover according to a specific embodiment of this application is shown;

[0021] Figure 2 It shows Figure 1 A schematic diagram of the structure of the convex bulge on the top cover of the battery pack;

[0022] Figure 3 It shows Figure 1 A schematic diagram of the fire-fighting components on the battery pack cover;

[0023] Figure 4 It shows Figure 1 A schematic diagram of the structure of the top cover of the battery pack.

[0024] The above figures include the following reference numerals:

[0025] 10. Top cover body; 11. First mounting opening; 12. Fixing block; 20. Top cover protrusion; 21. Third mounting opening; 30. Fire-fighting component; 31. Liquid storage tank; 32. Fire nozzle; 33. Electrical interface; 34. Mounting base; 40. Welded flange; 50. Reinforcing rib. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0028] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0029] To address the issue of poor performance of existing battery pack covers, this application provides a battery pack cover and a battery pack.

[0030] Furthermore, the battery pack in this application has the following battery pack cover.

[0031] like Figures 1 to 4 As shown, the battery pack cover in this application includes a cover body 10, a cover protrusion 20, and a fire-fighting component 30. The cover body 10 has a first mounting opening 11; the cover protrusion 20 has a receiving cavity and a second mounting opening and a third mounting opening 21 respectively communicating with the receiving cavity. The cover protrusion 20 is disposed on the cover body 10, and the second mounting opening is disposed corresponding to the first mounting opening 11; the fire-fighting component 30 is disposed on the cover body 10, and the fire-fighting component 30 is connected to the cover protrusion 20 through the third mounting opening 21; the hardness of the cover body 10 is greater than the hardness of the cover protrusion 20.

[0032] When using the battery pack cover of this application, since the battery pack cover has a cover body 10 and a cover protrusion 20, a split design of the battery pack cover can be realized. The main function of the cover protrusion 20 in this application is that when the internal space of the battery pack is insufficient, some components need to be arranged in the thickness direction of the battery pack. At this time, the cover protrusion 20 can be used to form a receiving cavity to expand the space. In addition, the hardness of the cover body 10 is greater than that of the cover protrusion 20, so that the battery pack cover can meet the strength requirements and ensure that the battery pack cover has a good elongation rate, so as to ensure the safety performance of the battery pack and cope with the complex cover design. At the same time, since the battery pack cover of this application also has a fire-fighting component 30, it can actively suppress thermal runaway. Therefore, compared with the battery pack cover of the prior art, this application has the feature of actively protecting the battery pack. Therefore, the battery pack cover of this application effectively solves the problem of poor performance of the battery pack cover in the prior art.

[0033] In this application, the material used to make the top cover protrusion 20 is a steel with good elongation, deep drawing capability, and relatively low strength, including but not limited to DC03, DC04, and DC05. This ensures that the battery pack top cover can cope with complex cover designs and allows for deep drawing to create the accommodating cavity. The material used to make the top cover body 10 is a steel with high strength but poor formability and cannot be deep drawn, including but not limited to HC340. This ensures that the battery pack top cover meets the strength requirements for use, thus guaranteeing the safety performance of the battery pack. By using different materials for the top cover body 10 and the top cover protrusion 20, and by making the hardness of the top cover body 10 greater than that of the top cover protrusion 20, the battery pack top cover can meet the strength requirements for use while also ensuring good elongation, thus guaranteeing the safety performance of the battery pack and coping with complex cover designs.

[0034] It should be noted that in the present application, the upper cover protrusion 20 and the upper cover body 10 can be connected by welding. Alternatively, the periphery of the side of the upper cover body 10 and the upper cover protrusion 20 close to each other is welded. As for the fire-fighting assembly 30 and the upper cover body 10, a detachable connection can be achieved by bolt fixation and the like, so as to ensure that the assembly between the fire-fighting assembly 30 and the upper cover body 10 is more flexible, and the fire-fighting assembly 30 can be conveniently replaced.

[0035] Alternatively, as shown in Figure 1 , the upper cover protrusion 20 and the fire-fighting assembly 30 are arranged on the same side of the upper cover body 10. Further alternatively, the second mounting opening is arranged on the bottom surface of the upper cover protrusion 20, and the top surface of the upper cover protrusion 20 is located above the upper cover body 10. In the present application, when the battery pack upper cover is mounted on the battery pack, the upper cover protrusion 20 and the fire-fighting assembly 30 are located on the outer surface of the battery pack, or in other words, the upper cover protrusion 20 and the fire-fighting assembly 30 are arranged on the top surface in the thickness direction of the upper cover body 10. At the same time, in the present application, since the upper cover protrusion 20 has a containing cavity, the thickness or height of the upper cover protrusion 20 is greater than the thickness or height of the upper cover body 10, and after the assembly of the upper cover protrusion 20 and the upper cover body 10 is completed, the upper cover protrusion 20 protrudes from the top surface of the upper cover body 10.

[0036] It should be noted that in the present application, the area of the top surface of the upper cover body 10 is greater than the area of the top surface of the upper cover protrusion 20. In the present application, since the upper cover body 10 uses high-strength steel, it basically covers most of the area of the battery pack upper cover, which can protect the battery to a greater extent.

[0037] Alternatively, the periphery of the first mounting opening 11 is provided with a welded flange 40.

[0038] Alternatively, the periphery of the second mounting opening is provided with a welded flange 40.

[0039] In one specific embodiment of the present application, as shown in Figure 2 and Figure 4 , the periphery of the first mounting opening 11 and the periphery of the second mounting opening are both provided with a welded flange 40. In the present embodiment, by such arrangement, the welding area between the upper cover body 10 and the upper cover protrusion 20 can be effectively increased, so as to realize various forms of welding, thereby ensuring that the connection mode between the upper cover body 10 and the upper cover protrusion 20 is more flexible, and the strength and reliability of the welding are higher. In the present application, the welding mode includes but is not limited to arc welding, laser welding, roll welding and the like.

[0040] Alternatively, the surface of the side of the upper cover body 10 facing the upper cover protrusion 20 is provided with at least one reinforcing rib 50.

[0041] Optionally, the outer surface of the upper cover protrusion 20 is provided with at least one reinforcing rib 50.

[0042] Optionally, the reinforcing rib 50 is a "rice" shaped reinforcing rib.

[0043] In one specific embodiment of the present application, as shown in Figure 2 and Figure 4 the surface of the upper cover body 10 on the side facing the upper cover protrusion 20 and the outer surface of the upper cover protrusion 20 are both provided with at least one reinforcing rib 50. In this embodiment, by providing the reinforcing rib 50 on the top surface of the upper cover body 10, the upper cover body 10 can have higher structural strength. By providing the reinforcing rib 50 on the upper cover protrusion 20, the modal and stiffness of the upper cover protrusion 20 can be improved, stress concentration can be reduced, and thus the upper cover protrusion 20 can have higher structural strength. Further, the reinforcing rib 50 is a "rice" shaped reinforcing rib, and the structure of the "rice" shaped reinforcing rib can make the strength higher, thereby further improving the structural strength of the upper cover. Of course, in the present application, the reinforcing rib 50 can also be provided in other shapes according to actual design needs.

[0044] In one specific embodiment of the present application, as shown in Figure 3 the fire-fighting assembly 30 includes a liquid storage tank 31 and an electrical interface 33. The liquid storage tank 31 is detachably provided on the upper cover body 10, the liquid storage tank 31 has a fire-fighting nozzle 32, and the inside of the liquid storage tank 31 is in openable and closable communication with the third mounting opening 21 through the fire-fighting nozzle 32; the electrical interface 33 is provided on the liquid storage tank 31. In this embodiment, the liquid storage tank 31 can store fire extinguishing medium, and the liquid storage tank 31 can be a water-based fire extinguisher. At the same time, through the cooperation of the fire-fighting nozzle 32 and the third mounting opening 21, the fire extinguishing medium can enter the battery pack through the fire-fighting nozzle 32 and the third mounting opening 21, and the fire extinguishing and explosion-proof function can be realized. Further, the electrical interface 33 can be connected with the vehicle control unit, and when the battery pack BMS triggers a thermal runaway alarm, the vehicle end will control the opening of the fire-fighting function, that is, at this time the fire-fighting nozzle 32 can be in communication with the third mounting opening 21, thereby actively suppressing the spread of fire.

[0045] Optionally, as shown in Figure 3 the fire-fighting assembly 30 further includes a mounting seat 34, the liquid storage tank 31 is provided on the mounting seat 34 and detachably connected with the upper cover body 10 through the mounting seat 34; or the liquid storage tank 31 is provided with a mounting flange corresponding to the upper cover body 10, and the liquid storage tank 31 is detachably connected with the upper cover body 10 through the mounting flange. In the present application, by providing the mounting seat 34 or the mounting flange, the liquid storage tank 31 can be more easily bolted with the upper cover body 10. By providing the mounting seat 34 or the mounting flange, the stability of the liquid storage tank 31 can also be effectively improved.

[0046] Optionally, as shown inFigure 1 and Figure 4 As shown, the upper cover body 10 also includes a fixing block 12, on which the fire-fighting component 30 is mounted. This arrangement provides an installation area for the fire-fighting component 30 via the fixing block 12, effectively improving the stability of the connection between the liquid storage tank 31 and the upper cover body 10, and providing some protection for the liquid storage tank 31, thereby enhancing the safety performance of the battery pack. Furthermore, during the assembly of the liquid storage tank 31 and the upper cover body 10, the fixing block 12 reduces installation errors between them and improves assembly efficiency.

[0047] Optionally, the fixing block 12 is arranged along the periphery of the first mounting opening 11. This arrangement effectively shortens the connection distance between the fire-fighting component 30 and the upper cover protrusion 20, thereby ensuring that the fire-fighting component 30 can more quickly inject the extinguishing medium into the battery pack through the upper cover protrusion 20. This effectively improves the active suppression of thermal runaway effect of the battery pack upper cover in this application, enabling the battery pack in this application to more quickly and actively suppress thermal runaway.

[0048] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0049] The battery pack cover in this application can be made of two materials, high-strength steel and high-elongation steel, welded together, possessing both deep-drawing characteristics and the properties of high-strength steel. Simultaneously, a fire suppression component 30 is integrated into the battery pack cover. When thermal runaway is detected, the fire suppression component 30 will spray a fire extinguishing medium into the battery pack through the battery pack cover, thereby actively suppressing thermal runaway.

[0050] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0051] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0052] It should be noted that the terms "first", "second", and the like in the description and in the claims of the present application and in the above-described drawings are used only for distinguishing between similar objects and do not necessarily have to describe a specific sequential or chronological order. It is to be understood that the data so distinguished can be interchanged, under appropriate circumstances, such that the embodiments of the present application described herein can be practiced in other than the illustrated or described order.

[0053] The preferred embodiments of the present application have been described above with the specific details. Obviously, the present application can be carried out without the specific details. It is to be understood that the above-described embodiments are only used to illustrate the present application, and the present application can be modified and changed in various ways by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery pack cover, characterized in that, Comprising: An upper cover body (10), the upper cover body (10) having a first mounting opening (11); An upper cover convex hull (20), the upper cover convex hull (20) having a receiving cavity and a second mounting opening and a third mounting opening (21) respectively communicating with the receiving cavity, the upper cover convex hull (20) being provided on the upper cover body (10), and the second mounting opening being arranged corresponding to the first mounting opening (11); A fire-fighting component (30), the fire-fighting component (30) being provided on the upper cover body (10), and the fire-fighting component (30) being connected to the upper cover convex hull (20) through the third mounting opening (21); The hardness of the upper cover body (10) is greater than the hardness of the upper cover convex hull (20).

2. The battery pack cover according to claim 1, characterized in that, A welding flange (40) is provided on the periphery of the first mounting opening (11) and / or the periphery of the second mounting opening.

3. The battery pack cover according to claim 1, characterized in that, At least one reinforcing rib (50) is provided on the surface of the side of the upper cover body (10) facing the upper cover convex hull (20) and / or the outer surface of the upper cover convex hull (20).

4. The battery pack cover according to claim 3, characterized in that, The reinforcing rib (50) is a "rice" - shaped reinforcing rib.

5. The battery pack cover according to any one of claims 1 to 4, characterized in that, The fire-fighting component (30) comprises: A liquid storage tank (31), the liquid storage tank (31) being detachably provided on the upper cover body (10), the liquid storage tank (31) having a fire nozzle (32), and the interior of the liquid storage tank (31) being openably and closably communicated with the third mounting opening (21) through the fire nozzle (32); An electrical interface (33), the electrical interface (33) being provided on the liquid storage tank (31).

6. The battery pack cover according to claim 5, characterized in that, The fire-fighting component (30) further comprises a mounting seat (34), the liquid storage tank (31) being provided on the mounting seat (34) and detachably connected to the upper cover body (10) through the mounting seat (34).

7. The battery pack cover according to claim 5, characterized in that, The liquid storage tank (31) is provided with a mounting flange corresponding to the upper cover body (10), and the liquid storage tank (31) is detachably connected to the upper cover body (10) through the mounting flange.

8. The battery pack cover according to any one of claims 1 to 4, characterized in that, The upper cover body (10) further comprises a fixing block (12), and the fire-fighting component (30) is provided on the fixing block (12).

9. The battery pack cover according to claim 8, characterized in that, The fixing block (12) is arranged along the periphery of the first mounting opening (11).

10. A battery pack, characterized in that, Including the battery pack upper cover according to any one of claims 1 to 9.

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