Battery cover plate assembly, battery, battery pack, and vehicle

Abstract

The application discloses a battery cover plate assembly, a battery, a battery pack and a vehicle. The battery cover plate assembly comprises a cover plate, wherein an anti-explosion area is arranged on the cover plate, and a first anti-explosion through hole is arranged in the anti-explosion area; a support frame is removably arranged at the anti-explosion area; and an anti-explosion valve diaphragm assembly is arranged at the anti-explosion area, wherein the anti-explosion valve diaphragm assembly comprises an anti-explosion diaphragm, the support frame supports the anti-explosion diaphragm, the anti-explosion diaphragm is opened when the air pressure in the battery is greater than a threshold value, and the support frame is separated from the cover plate together with the air flow in the battery. The battery cover plate assembly can prevent the anti-explosion diaphragm from being broken inwardly when the anti-explosion diaphragm is impacted by external force. Meanwhile, when the air pressure in the battery is greater than the threshold value, the anti-explosion diaphragm in the anti-explosion valve diaphragm assembly is opened by the air flow, the support frame can be separated from the cover plate together with the air flow, and the effective use area of the anti-explosion valve exhaust passage is not affected.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery cover assembly, a battery, a battery pack, and a vehicle. Background Technology

[0002] Currently, most battery covers are equipped with explosion-proof valves. When a battery runs out of control under abusive conditions, the gases and heat generated by the runaway reaction can be vented in a directed manner through the explosion-proof valve, reducing the risk of battery explosion.

[0003] However, existing explosion-proof valve designs lack direct support beneath the explosion-proof diaphragm. When external force is applied to the valve, there is a risk of it rupturing inwards. Alternatively, some cover designs incorporate a metal frame under the explosion-proof diaphragm. However, this metal frame is typically an integral part of the cover, reducing the effective usable area of ​​the explosion-proof valve, increasing exhaust pressure, and exacerbating safety hazards. Summary of the Invention

[0004] One objective of this application is to provide a new technical solution for a battery cover assembly, which can at least solve the problems in the prior art where there is no explosion-proof diaphragm support structure or the effective usable area of ​​the explosion-proof valve is reduced due to the design of a support structure.

[0005] According to a first aspect of this application, a battery cover assembly is provided, comprising: a cover plate having an explosion-proof area and a first explosion-proof through hole extending along the thickness direction of the cover plate within the explosion-proof area; a support frame removably disposed at the explosion-proof area, and the support frame corresponding to the position of the first explosion-proof through hole; and an explosion-proof valve diaphragm assembly disposed at the explosion-proof area, the explosion-proof valve diaphragm assembly including an explosion-proof diaphragm, the support frame supporting the explosion-proof diaphragm, wherein when the gas pressure inside the battery is greater than a threshold, the explosion-proof diaphragm opens, and the support frame detaches from the cover plate along with the airflow inside the battery.

[0006] Optionally, the explosion-proof area is provided with a first edge portion and a second edge portion surrounding the first explosion-proof through hole. The first edge portion and the second edge portion are distributed in a stepped manner in the thickness direction of the cover plate, and the annular circumference of the first edge portion is greater than the annular circumference of the second edge portion. The second edge portion surrounds and defines the first explosion-proof through hole, and the support frame is detachably connected to the second edge portion.

[0007] Optionally, the explosion-proof valve diaphragm assembly further includes: an explosion-proof valve seat, the explosion-proof valve seat having a second explosion-proof through hole, the second explosion-proof through hole corresponding to the position of the first explosion-proof through hole, the explosion-proof valve seat being connected to the first edge portion; the explosion-proof diaphragm being disposed on the explosion-proof valve seat, the explosion-proof diaphragm opening when the gas pressure inside the battery exceeds a threshold, thereby forming the second explosion-proof through hole on the explosion-proof valve seat, and the support frame disengaging from the cover plate through the second explosion-proof through hole along with the airflow inside the battery.

[0008] Optionally, the explosion-proof diaphragm's orthographic projection on the cover plate covers the support frame.

[0009] Optionally, the explosion-proof valve assembly and the cover plate are made of the same material.

[0010] Optionally, a weak area is formed on the explosion-proof valve seat by laser engraving, and the explosion-proof diaphragm is formed within the weak area.

[0011] Optionally, the explosion-proof valve diaphragm assembly further includes a protective sheet, which is disposed on the explosion-proof valve seat and the orthographic projection of the protective sheet on the explosion-proof valve seat covers the explosion-proof diaphragm.

[0012] Optionally, the support frame has a connecting portion on the side facing away from the explosion-proof valve diaphragm assembly, and the connecting portion is detachably connected to the second edge portion.

[0013] Optionally, the connecting part is at least one hook provided on the bottom surface of the support frame, and the hook engages with the second edge part.

[0014] Optionally, the connecting part is at least one locking post provided on the bottom surface of the support frame, and the second edge part is provided with a locking groove corresponding to the locking post, and the locking post engages with the locking groove.

[0015] Optionally, the support frame may be cross-shaped, star-shaped, mesh-shaped, or striped.

[0016] Optionally, the support frame may be made of metal, polymer, or wood.

[0017] According to a second aspect of this application, a battery is provided, including a housing; a battery cell disposed within the housing; and a battery cover assembly as described in the above embodiments, the battery cover assembly being disposed on the housing.

[0018] According to a third aspect of this application, a battery pack is provided, including a battery tray; a plurality of batteries as described in the above embodiments, the plurality of batteries being disposed on the battery tray, and each battery being provided with a battery cover assembly as described in the above embodiments.

[0019] According to a fourth aspect of this application, a vehicle is provided, including a vehicle body; a battery pack as described in the above embodiments, the battery pack being disposed within the vehicle body, the battery pack containing batteries as described in the above embodiments, each battery including a battery cover assembly as described in the above embodiments.

[0020] According to an embodiment of the present invention, a battery cover assembly includes a support frame and an explosion-proof valve diaphragm assembly disposed in the explosion-proof area of ​​the cover. The support frame is removably disposed on the cover and supports the weak area of ​​the explosion-proof valve diaphragm assembly, preventing the valve from failing to rupture inward when the weak area is subjected to external impact. Simultaneously, when the gas pressure inside the battery exceeds a threshold, the weak area of ​​the explosion-proof valve diaphragm assembly is opened by the airflow, and the support frame can detach from the cover with the airflow, without affecting the effective usable area of ​​the explosion-proof valve exhaust channel, thus ensuring the space utilization rate of the explosion-proof valve diaphragm assembly.

[0021] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.

[0023] Figure 1 This is an exploded view of the battery cover assembly according to Embodiment 1 of the present invention.

[0024] Figure 2 This is a schematic diagram of the assembly of the support frame and the cover plate of the battery cover plate assembly according to Embodiment 1 of the present invention.

[0025] Figure 3 This is a cross-sectional view of the battery cover assembly according to Embodiment 1 of the present invention;

[0026] Figure 4 yes Figure 3 A magnified view of a portion of region A in the middle;

[0027] Figure 5 This is a schematic diagram of the support frame of the battery cover assembly according to Embodiment 1 of the present invention;

[0028] Figure 6 This is an exploded view of the battery cover assembly according to Embodiment 2 of the present invention;

[0029] Figure 7 This is a cross-sectional view of the battery cover assembly according to Embodiment 2 of the present invention;

[0030] Figure 8 yes Figure 7 A magnified view of a portion of region B in the middle;

[0031] Figure 9 This is a schematic diagram of the support frame of the battery cover assembly according to Embodiment 2 of the present invention.

[0032] Figure label:

[0033] Battery cover assembly 100;

[0034] 10. Cover plate; 11. First explosion-proof through hole; 12. First edge portion; 13. Second edge portion; 14. Electrode post; 15. Injection hole; 16. Slot;

[0035] Support frame 20; Connecting part 21;

[0036] Explosion-proof valve diaphragm assembly 30; explosion-proof valve seat 31; explosion-proof diaphragm 32; protective plate 33. Detailed Implementation

[0037] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0038] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0039] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0040] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0041] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0042] The battery cover assembly 100 according to an embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0043] like Figures 1 to 9 As shown, the battery cover assembly 100 according to an embodiment of the present invention includes a cover 10, a support frame 20, and an explosion-proof valve diaphragm assembly 30.

[0044] Specifically, the cover plate 10 has an explosion-proof area, and a first explosion-proof through hole 11 extending along the thickness direction of the cover plate 10 is provided within the explosion-proof area. A support frame 20 is removably disposed in the explosion-proof area, and the position of the support frame 20 corresponds to the position of the first explosion-proof through hole 11. An explosion-proof valve diaphragm assembly 30 is disposed in the explosion-proof area. The explosion-proof valve diaphragm assembly 30 includes an explosion-proof diaphragm 32, which is supported by the support frame 20. When the gas pressure inside the battery exceeds a threshold, the explosion-proof diaphragm 32 opens, and the support frame 20 detaches from the cover plate 10 along with the airflow inside the battery.

[0045] In other words, see Figure 1 and Figure 2 According to an embodiment of the present invention, the battery cover assembly 100 mainly comprises a cover plate 10, a support frame 20, and an explosion-proof valve diaphragm assembly 30. The cover plate 10 has an explosion-proof area, and a first explosion-proof through hole 11 is provided within the explosion-proof area, the first explosion-proof through hole 11 extending along the thickness direction of the cover plate 10. The support frame 20 is removably disposed at the explosion-proof area and located at the position of the first explosion-proof through hole 11. The support frame 20 is capable of detaching from the cover plate 10 along with the airflow when the airflow inside the battery reaches a certain pressure.

[0046] An explosion-proof valve diaphragm assembly 30 is positioned in the explosion-proof area, above the support frame 20. The assembly includes an explosion-proof diaphragm 32, and the support frame 20 corresponds to and supports the diaphragm 32. When the explosion-proof diaphragm 32 is subjected to external impact, it will not rupture towards the inside of the battery, thus preventing the explosion-proof function of the assembly from failing. The support frame 20 provides good support and protection for the explosion-proof diaphragm 32. The area where the explosion-proof diaphragm 32 is located can be considered the rupture zone of the explosion-proof valve diaphragm assembly 30, and the diaphragm 32 has relatively low structural strength. When the gas pressure inside the battery exceeds the threshold in the explosion-proof valve diaphragm assembly 30, the explosion-proof diaphragm 32 can be opened by the airflow, and the support frame 20 will detach from the cover plate 10 along with the airflow inside the battery. This helps to expel the gas or heat inside the battery in a timely manner, greatly reducing the risk of battery explosion and improving battery safety.

[0047] It should be noted that batteries are prone to runaway under abusive conditions or other abnormal situations. This runaway reaction generates a large amount of gas and heat. If this gas or heat cannot be expelled from the battery in time, there is a risk of explosion, significantly impacting user safety. This application addresses this by providing a removable support frame 20. Firstly, the support frame 20 supports the explosion-proof diaphragm 32 in the explosion-proof valve diaphragm assembly 30, preventing it from rupturing inwards when subjected to external impact. Secondly, when the gas pressure inside the battery exceeds a threshold, the explosion-proof diaphragm 32 in the explosion-proof valve diaphragm assembly 30 can be opened by the airflow, allowing the support frame 20 to detach from the cover plate 10 along with the airflow. This does not affect the effective usable area of ​​the explosion-proof valve's exhaust channel, ensuring efficient space utilization of the explosion-proof valve diaphragm assembly 30. Therefore, the battery cover assembly 100 of this application satisfies both the protection requirements of the explosion-proof valve against external impacts and resolves the contradiction of the support frame 20 reducing the effective usable area of ​​the explosion-proof valve's exhaust channel.

[0048] In existing technology, a metal frame is integrated with the cover plate 10, and this frame remains connected to the cover plate 10 throughout the explosion-proof valve's rupture process. Therefore, the presence of the metal frame reduces the effective usable area of ​​the explosion-proof valve, increases the exhaust pressure, and further increases safety hazards. The metal frame on the cover plate 10 in existing technology can reduce the effective usable area of ​​the explosion-proof valve by approximately 20%-50%. To meet exhaust requirements, the area of ​​the explosion-proof valve needs to be further increased. However, the limited area of ​​the cover plate 10 leads to insufficient usable space.

[0049] Of course, it is understandable and achievable for those skilled in the art that the cover plate 10 is also provided with structures such as the pole post 14 and the injection hole 15, and will not be described in detail in this application.

[0050] Therefore, according to the battery cover assembly 100 of the present invention, by providing a support frame 20 and an explosion-proof valve diaphragm assembly 30 in the explosion-proof area of ​​the cover 10, the support frame 20 is removably mounted on the cover 10. The support frame 20 can support the weak area in the explosion-proof valve diaphragm assembly 30, preventing the valve from breaking inward when the weak area of ​​the explosion-proof diaphragm 30 is subjected to external impact. At the same time, when the gas pressure inside the battery is greater than the threshold, the weak area in the explosion-proof valve diaphragm assembly 30 is opened by the airflow, and the support frame 20 can detach from the cover 10 along with the airflow, without affecting the effective usable area of ​​the explosion-proof valve exhaust channel, thus ensuring the space utilization rate of the explosion-proof valve diaphragm assembly 30.

[0051] According to one embodiment of the present invention, the explosion-proof area is provided with a first edge portion 12 and a second edge portion 13 surrounding the first explosion-proof through hole 11. The first edge portion 12 and the second edge portion 13 are distributed in a stepped manner in the thickness direction of the cover plate 10, and the annular circumference of the first edge portion 12 is greater than the annular circumference of the second edge portion 13. The second edge portion 13 surrounds and defines the first explosion-proof through hole 11, and the support frame 20 is detachably connected to the second edge portion 13.

[0052] In other words, see Figure 1 The cover plate 10 has a first edge portion 12 and a second edge portion 13 arranged in a ring around the first explosion-proof through hole 11 at the explosion-proof area. The first edge portion 12 and the second edge portion 13 are distributed in a stepped manner in the thickness direction of the cover plate 10, and the annular circumference of the first edge portion 12 is greater than the annular circumference of the second edge portion 13. The first edge portion 12 forms an outer ring, and the second edge portion 13 forms an inner ring. The second edge portion 13 surrounds and defines the first explosion-proof through hole 11. The support frame 20 is detachably connected to the second edge portion 13 on the cover plate 10 from the outside of the cover plate 10 toward the inside of the cover plate 10. When the battery is in normal use, the support frame 20 is located below the explosion-proof diaphragm 32, supporting the explosion-proof diaphragm 32 and preventing the explosion-proof diaphragm 32 from breaking inward when subjected to external impact. The outer side of the cover plate 10 can be understood as the side of the cover plate 10 facing away from the internal battery in the battery structure, and the inner side of the cover plate 10 can be understood as the side of the cover plate 10 facing the internal battery in the battery structure.

[0053] When the battery experiences thermal runaway and requires venting, the airflow can break through the explosion-proof diaphragm 32, and the support frame 20 can detach from the cover plate 10 along with the airflow, without affecting the effective usable area of ​​the explosion-proof valve venting channel, thus ensuring the space utilization rate of the explosion-proof valve diaphragm assembly 30.

[0054] According to one embodiment of the present invention, the explosion-proof valve diaphragm assembly 30 further includes an explosion-proof valve seat 31.

[0055] Specifically, the explosion-proof valve seat 31 is provided with a second explosion-proof through hole, which corresponds to the position of the first explosion-proof through hole 11. The explosion-proof valve seat 31 is connected to the first edge portion 12. An explosion-proof diaphragm 32 is provided on the explosion-proof valve seat 31. When the gas pressure inside the battery is greater than a threshold, the explosion-proof diaphragm 32 opens to form a second explosion-proof through hole on the explosion-proof valve seat 31. The support frame 20 detaches from the cover plate 10 through the second explosion-proof through hole along with the airflow inside the battery.

[0056] In other words, see Figure 1 , Figure 2 and Figure 6The explosion-proof valve diaphragm assembly 30 mainly consists of an explosion-proof valve seat 31 and an explosion-proof diaphragm 32. The explosion-proof valve seat 31 has a second explosion-proof through-hole, which corresponds to the position of the first explosion-proof through-hole 11. The explosion-proof valve seat 31 is located in the explosion-proof area of ​​the cover plate 10 and is fixedly connected to the first edge 12 in the explosion-proof area, improving the stability of the connection between the explosion-proof valve seat 31 and the cover plate 10. The explosion-proof diaphragm 32 is located at the second explosion-proof through-hole. The edge of the explosion-proof diaphragm 32 constitutes a weak area of ​​the explosion-proof valve diaphragm assembly 30. The support frame 20 supports the explosion-proof diaphragm 32 to prevent it from breaking inwards when subjected to external impact. Simultaneously, when the air pressure inside the battery exceeds a threshold in the explosion-proof valve diaphragm assembly 30, the airflow can break through the explosion-proof diaphragm 32, causing it to open and forming a second explosion-proof through hole on the explosion-proof valve seat 31. The support frame 20 can then detach from the cover plate 10 along with the airflow through the second explosion-proof through hole, without affecting the effective usable area of ​​the explosion-proof diaphragm 32, thus ensuring the space utilization rate of the explosion-proof valve diaphragm assembly 30. This threshold can be understood as the maximum pressure value that the entire battery can withstand. This threshold can be determined according to specific circumstances such as batteries of different sizes and made of different materials, and will not be elaborated upon in this application.

[0057] In one specific embodiment of the present invention, the orthographic projection of the explosion-proof diaphragm 32 onto the cover plate 10 covers the support frame 20. The explosion-proof valve diaphragm assembly 30 is made of the same material as the cover plate, and a weak area is formed on the explosion-proof valve seat 31 by laser engraving, within which the explosion-proof diaphragm 32 is formed.

[0058] In other words, such as Figure 3 and Figure 7 As shown, the area occupied by the explosion-proof diaphragm 32 on the cover plate 10 is sufficient to cover the entire support frame 20, ensuring that the support frame 20 is completely covered by the explosion-proof diaphragm 32. This guarantees that when the explosion-proof diaphragm 32 is opened, the support frame 20 can detach from the cover plate 10 with the airflow, without affecting the effective usable area of ​​the explosion-proof diaphragm 32. The explosion-proof valve seat 31 and the cover plate 10 can be made of aluminum, or the cover plate 10 can be made of steel. The explosion-proof valve seat 31 can be welded to the cover plate 10. When the cover plate 10 is made of aluminum, the explosion-proof valve seat 31 is also made of aluminum. A weak area can be formed on the explosion-proof valve seat 31 by laser marking. The explosion-proof diaphragm 32 is formed within this weak area, reducing the connection strength between the explosion-proof diaphragm 32 and the explosion-proof valve seat 31. This ensures that when the battery requires venting, the airflow can promptly break through the explosion-proof diaphragm 32 and exit the cover plate 10, meeting the explosion-proof requirements.

[0059] According to one embodiment of the present invention, the explosion-proof valve diaphragm further includes a protective sheet 33, which is disposed on the explosion-proof valve seat 31, and the orthogonal projection of the protective sheet 33 on the explosion-proof valve seat 31 covers the explosion-proof diaphragm 32.

[0060] In other words, see Figure 1 , Figure 2 and Figure 6 The explosion-proof valve diaphragm assembly 30 also includes a protective sheet 33, which can be attached to the explosion-proof valve seat 31. The protective sheet 33 has a certain structural strength, and its area is larger than that of the explosion-proof diaphragm 32. By providing the protective sheet 33 on the explosion-proof diaphragm 32, the explosion-proof diaphragm 32 can be effectively protected, preventing it from bursting under external impact.

[0061] According to one embodiment of the present invention, a connecting portion 21 is provided on the side of the support frame 20 facing away from the explosion-proof valve diaphragm assembly 30, and the connecting portion 21 is detachably connected to the second edge portion 13.

[0062] In other words, see Figure 4 , Figure 5 , Figure 8 and Figure 9 The bottom surface of the support frame 20 is provided with a connecting part 21, which is detachably connected to the second edge part 13. The support frame 20 is detachably connected to the second edge part 13 on the cover plate 10 from the outside of the cover plate 10 toward the inside of the cover plate 10 through the connecting part 21. This not only supports the explosion-proof diaphragm 32 and prevents it from breaking inward when subjected to external impact, but also allows the airflow to break through the explosion-proof diaphragm 32 when the battery experiences thermal runaway and needs to vent, so that the support frame 20 can detach from the cover plate 10 along with the airflow without affecting the effective usable area of ​​the explosion-proof diaphragm 32, thus ensuring the space utilization rate of the explosion-proof valve diaphragm assembly 30.

[0063] According to one embodiment of the present invention, the connecting part 21 is at least one hook provided on the bottom surface of the support frame 20, and the hook engages with the second edge part 13.

[0064] In other words, such as Figure 4 and Figure 5 As shown, the connecting part 21 can be designed as a hook, and one or more hooks can be designed on the bottom surface of the support frame 20. The support frame 20 is engaged with the second edge part 13 of the cover plate 10 through the hook, so as to realize the removable connection between the support frame 20 and the cover plate 10.

[0065] According to another embodiment of the present invention, the connecting part 21 is at least one locking post provided on the bottom surface of the support frame 20, and the second edge part 13 is provided with a locking groove 16 corresponding to the locking post, and the locking post is engaged with the locking groove 16.

[0066] In other words, such as Figure 8 and Figure 9As shown, the connecting part 21 can also be designed as a locking post. The bottom surface of the support frame 20 can be designed with one or more locking posts. The second edge part 13 of the cover plate 10 is provided with a locking groove 16 corresponding to the locking post. The support frame 20 is locked into the locking groove 16 of the second edge part 13 by the locking post, so as to realize the removable connection between the support frame 20 and the cover plate 10.

[0067] Of course, in this application, the specific structure of the connecting part 21 on the support frame 20 is not limited to a hook or a post. Other structural designs that can be removably connected to the cover plate 10 should also fall within the protection scope of this application.

[0068] In one specific embodiment of the present invention, the support frame 20 is shaped as a cross, a star, a mesh, or a stripe. The support frame 20 is made of metal, polymer, or wood.

[0069] In other words, the support frame 20 can be designed in the shape of a cross, a star, a mesh, or stripes. The support frame 20 can be a solid frame or a perforated frame. Taking a cross-shaped support frame 20 as an example... Figure 5 and Figure 9 As shown, the four ends of the support frame 20 are respectively provided with hooks or posts for connecting the second edge portion 13, realizing a removable connection between the support frame 20 and the cover plate 10. The support frame 20 is made of metal (including alloys or other mixed metal materials), polymer materials, or wood materials. Optionally, the support frame 20 of this application can be made of a polymer with electrolyte corrosion resistance. Of course, in this application, the specific shape and manufacturing material of the support frame 20 are not specifically limited; as long as the design form of support and removable connection can be satisfied, it should fall within the protection scope of this application.

[0070] In summary, the battery cover assembly 100 according to embodiments of the present invention, by providing a support frame 20 and an explosion-proof valve diaphragm assembly 30 in the explosion-proof area of ​​the cover 10, the support frame 20 is removably mounted on the cover 10 and can support the explosion-proof diaphragm 32, preventing the explosion-proof diaphragm 32 from breaking inward when subjected to external impact. Simultaneously, when the gas pressure inside the battery exceeds a threshold, the explosion-proof diaphragm 32 is forced open by the airflow, and the support frame 20 can detach from the cover 10 along with the airflow, without affecting the effective usable area of ​​the explosion-proof diaphragm 32, thus ensuring the space utilization rate of the explosion-proof valve diaphragm assembly 30.

[0071] According to a second aspect of this application, a battery is provided, including a casing, a battery cell, and a battery cover assembly 100 as described in the above embodiments. The battery cell is disposed within the casing, and the battery cover assembly 100 is disposed on the casing. Since the battery cover assembly 100 according to the embodiments of the present invention has the aforementioned technical effects, the battery according to the embodiments of the present invention should also have corresponding technical effects. That is, by employing the battery cover assembly 100, the battery of the present invention can prevent the explosion-proof diaphragm 32 from rupturing inward under external impact. Simultaneously, when the air pressure inside the battery exceeds a threshold, the explosion-proof diaphragm 32 is opened by the airflow, and the support frame 20 can detach from the cover 10 along with the airflow, without affecting the effective usable area of ​​the explosion-proof diaphragm 32, ensuring the space utilization rate of the battery and improving the safety of the battery pack.

[0072] Of course, other battery structures and their working principles are understandable and achievable for those skilled in the art, and will not be described in detail in this application.

[0073] According to a third aspect of this application, a battery pack is provided, including a battery tray and a plurality of batteries as described in the above embodiments. The plurality of batteries are disposed on the battery tray, and each battery is provided with a battery cover assembly 100. Since the battery according to the embodiments of the present invention has the above-described technical effects, the battery pack according to the embodiments of the present invention should also have corresponding technical effects. That is, by using this battery, the battery pack of the present invention can prevent the explosion-proof diaphragm 32 from rupturing inward when subjected to external impact. Simultaneously, when the air pressure inside the battery exceeds a threshold, the explosion-proof diaphragm 32 is opened by the airflow, and the support frame 20 can detach from the cover 10 along with the airflow, without affecting the effective usable area of ​​the explosion-proof diaphragm 32, ensuring the space utilization rate of the batteries in the battery pack, and improving the safety of the batteries in the battery pack.

[0074] Of course, other structures and working principles of the battery pack are understandable and achievable by those skilled in the art, and will not be described in detail in this application.

[0075] According to a fourth aspect of this application, a vehicle is provided, including a vehicle body and a battery pack as described in the above embodiments. The battery pack is disposed within the vehicle body, and the batteries described in the above embodiments are disposed within the battery pack. Each battery includes a battery cover assembly as described in the above embodiments. Since the battery pack according to the embodiments of the present invention has the aforementioned technical effects, the vehicle according to the embodiments of the present invention should also have corresponding technical effects; that is, by adopting this battery pack, the vehicle of the present invention can effectively improve vehicle safety.

[0076] Of course, other structures and working principles of the vehicle are understandable and achievable by those skilled in the art, and will not be described in detail in this application.

[0077] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A battery cover assembly, characterized in that, include: A cover plate, wherein an explosion-proof area is provided on the cover plate, and a first explosion-proof through hole is provided in the explosion-proof area along the thickness direction of the cover plate; A support frame is removably disposed in the explosion-proof area, and the position of the support frame corresponds to that of the first explosion-proof through hole; An explosion-proof valve diaphragm assembly is provided in the explosion-proof area. The explosion-proof valve diaphragm assembly includes an explosion-proof diaphragm, and a support frame supports the explosion-proof diaphragm. When the gas pressure inside the battery is greater than a threshold, the explosion-proof diaphragm opens, and the support frame detaches from the cover plate along with the airflow inside the battery.

2. The battery cover assembly according to claim 1, characterized in that, The explosion-proof area is provided with a first edge portion and a second edge portion surrounding the first explosion-proof through hole. The first edge portion and the second edge portion are distributed in a stepped manner in the thickness direction of the cover plate, and the annular circumference of the first edge portion is greater than the annular circumference of the second edge portion. The second edge portion surrounds and defines the first explosion-proof through hole, and the support frame is detachably connected to the second edge portion.

3. The battery cover assembly according to claim 2, characterized in that, The explosion-proof valve diaphragm assembly further includes: an explosion-proof valve seat, the explosion-proof valve seat having a second explosion-proof through hole, the second explosion-proof through hole corresponding to the position of the first explosion-proof through hole, the explosion-proof valve seat being connected to the first edge portion; the explosion-proof diaphragm being disposed on the explosion-proof valve seat, the explosion-proof diaphragm opening when the gas pressure inside the battery exceeds a threshold, thereby forming the second explosion-proof through hole on the explosion-proof valve seat, and the support frame detaching from the cover plate through the second explosion-proof through hole along with the airflow inside the battery.

4. The battery cover assembly according to claim 3, characterized in that, The explosion-proof diaphragm covers the support frame by its orthogonal projection onto the cover plate.

5. The battery cover assembly according to claim 3, characterized in that, The explosion-proof valve diaphragm assembly is made of the same material as the cover plate.

6. The battery cover assembly according to claim 3, characterized in that, A weak area is formed on the explosion-proof valve seat by laser engraving, and the explosion-proof diaphragm is formed within the weak area.

7. The battery cover assembly according to claim 3, characterized in that, The explosion-proof valve diaphragm assembly further includes a protective sheet, which is disposed on the explosion-proof valve seat and the orthographic projection of the protective sheet on the explosion-proof valve seat covers the explosion-proof diaphragm.

8. The battery cover assembly according to claim 2, characterized in that, The support frame has a connecting portion on the side facing away from the explosion-proof valve diaphragm assembly, and the connecting portion is detachably connected to the second edge portion.

9. The battery cover assembly according to claim 8, characterized in that, The connecting part is at least one hook provided on the bottom surface of the support frame, and the hook engages with the second edge part.

10. The battery cover assembly according to claim 8, characterized in that, The connecting part is at least one locking post located on the bottom surface of the support frame, and the second edge part is provided with a locking groove corresponding to the locking post, and the locking post engages with the locking groove.

11. The battery cover assembly according to claim 1, characterized in that, The support frame can be cross-shaped, star-shaped, mesh-shaped, or striped.

12. The battery cover assembly according to claim 1, characterized in that, The support frame is made of metal, polymer, or wood.

13. A battery, characterized in that, include: case; The battery cell is disposed within the housing; The battery cover assembly as described in any one of claims 1-12, wherein the battery cover assembly is disposed on the housing.

14. A battery pack, characterized in that, include: Battery tray; A plurality of batteries as described in claim 13, wherein the plurality of batteries are disposed on the battery tray, and each of the batteries is provided with a battery cover assembly as described in any one of claims 1-12.

15. A vehicle, characterized in that, include: Vehicle body; The battery pack of claim 14, wherein the battery pack is disposed within the vehicle body, the battery pack comprising the battery of claim 13, each of the batteries comprising the battery cover assembly of any one of claims 1-12.

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