Cover plate assembly, battery and vehicle

Abstract

The present application provides a cover plate assembly, a battery and a vehicle. The cover plate assembly comprises: a cover plate body; a pole, wherein a pole hole is correspondingly formed in the cover plate body, and the pole passes through the pole hole to be connected to the cover plate body; an explosion-proof valve arranged on the cover plate body; a power supply with a positive electrode connected to the cover plate body; and a corrosion adapter block arranged on the cover plate body and located between the pole and the explosion-proof valve.

Description

A cover plate assembly, battery and vehicle Cross Reference to Related Applications

[0001] This application claims priority to the Chinese patent application No. 202421112575.8, filed on May 21, 2024, and entitled "A cover plate assembly, battery and vehicle", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of batteries, and in particular to a battery cover plate assembly, battery and vehicle. BACKGROUND

[0003] With the increasing demand for power batteries, the safety of the batteries is becoming more and more stringent. Since electric vehicles need to go through various working conditions, it is inevitable to go through harsh environments such as high-salt-mist places, which will affect the safe use of the batteries. For example, the battery will be corroded in seawater immersion, which will cause liquid leakage and damage the structure of the battery, affecting the safety performance of the battery. How to ensure that the battery still maintains good reliability in harsh environments is a difficult problem that needs to be overcome in battery research and development. SUMMARY

[0004] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0005] The purpose of the present application is to provide a cover plate assembly, battery and vehicle, which can ensure that the battery structure is not damaged due to corrosion of the cover plate and the shell in some harsh environments such as seawater immersion, and improve the safety of the battery in complex environments.

[0006] The present application provides a cover plate assembly, comprising: a cover plate body; a pole, a pole hole corresponding to the cover plate body is provided, the pole passes through the pole hole and is connected with the cover plate body; an explosion-proof valve is provided on the cover plate body; a power supply, the positive electrode of the power supply is connected to the cover plate body; a corrosion adapter block is provided on the cover plate body and located between the pole and the explosion-proof valve.

[0007] According to an embodiment of the present application, a groove is provided on the cover plate body, and the groove is provided between the pole and the explosion-proof valve.

[0008] According to an embodiment of the present application, the groove comprises a first groove and a second groove, the shapes of the first groove and the second groove are adapted to the shapes of the corrosion adapter block and the power supply respectively, and the corrosion adapter block and the power supply are respectively installed in the first groove and the second groove.

[0009] According to one embodiment of the present application, the groove and the cover plate body are formed by one-piece stamping.

[0010] According to one embodiment of the present application, the corrosion adapter and the cover plate body are detachably connected.

[0011] According to one embodiment of the present application, the cover plate assembly further comprises a fixing member, which is installed on the surface of the cover plate body where the power supply is arranged and covers the second groove, and the fixing member fixes the power supply in the second groove.

[0012] According to one embodiment of the present application, the fixing member is a cap, one side of which is rotatably connected with the cover plate body, and the other side of which is fixedly connected with the cover plate body.

[0013] According to one embodiment of the present application, the other side of the cap is fixedly connected with the cover plate body by clamping.

[0014] According to one embodiment of the present application, the positive pole of the power supply abuts against the bottom surface of the second groove, and the negative pole of the power supply abuts against one side of the fixing member facing the cover plate body and is insulated from the cover plate body.

[0015] The present application also provides a battery comprising: a shell, wherein an electric core assembly is installed in the shell; and the cover plate assembly according to any one of the above embodiments, wherein the cover plate assembly is fixedly connected with the shell, and the electric core assembly is electrically connected with the pole on the cover plate assembly.

[0016] The present application also provides a vehicle comprising at least one battery according to the above embodiments.

[0017] The present application provides a cover plate assembly, a battery and a vehicle, wherein a detachable corrosion adapter is installed on the surface of the cover plate body, when external corrosion occurs, the corrosion adapter has a higher active degree than the cover plate, and the corrosion adapter with a higher active degree will be corroded first by losing electrons, which can effectively reduce or prevent the corrosion of the protected metal, i.e. effectively prevent the cover plate body from being corroded to cause liquid leakage. Moreover, the detachable corrosion adapter is convenient to replace at any time, which ensures that the cover plate body will not be corroded during the use of the battery; meanwhile, a power supply is arranged, the positive pole of which is connected with the cover plate body, so that the positive ions in the power supply are transmitted to the cover plate body, thereby improving the potential of the cover plate body to prevent corrosion. The present application has simple structure and good corrosion prevention effect, reduces the corrosion risk of the cover plate, improves the safety of the electric core, and effectively improves the safety of the battery in complex environments.

[0018] Other aspects can become apparent from a review of the drawings and detailed description. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 is an overall structural diagram of a cover plate assembly according to an embodiment of this application;

[0021] Figure 2 is an exploded perspective view of a cover plate assembly according to an embodiment of this application.

[0022] Labeling Explanation: 100, Cover plate body; 200, Corrosion adapter block; 300, Power supply; 400, Fixing component; 500, Terminal post; 600, Explosion-proof valve; 110, Groove; 120, Terminal post hole; 130, Explosion-proof hole; 111, First groove; 112, Second groove; 510, Insulating plastic part; 520, Insulating seal; 530, Fixing block. Detailed Implementation

[0023] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application.

[0024] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this application. Therefore, the illustrations only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0025] During battery use, it is inevitable to encounter some complex environments such as high salt spray environments. The complex external environment can cause corrosion to the battery cover. Once the battery cover is corroded, it may cause leakage and damage the internal structure of the battery cell, thereby affecting the safety of battery use.

[0026] Please refer to Figures 1 and 2. This application provides a cover plate assembly, including a cover plate body 100, an etching adapter block 200, a power supply 300, and a fixing member 400. The etching adapter block 200 and the power supply 300 are disposed on the side of the cover plate body 100 facing away from the inside of the battery. The fixing member 400 is mounted on the surface of the cover plate body 100 where the power supply 300 is disposed, for fixing the power supply 300.

[0027] The cover plate body 100 is connected with the battery shell and seals the cell structure in the battery shell. The corrosion adapter 200 comprises a metal with a higher activity degree than the material of the shell and the cover plate body, for example, the material of the corrosion adapter 200 can be magnesium, and the material of the cover plate body 100 and the battery shell can be aluminum. Since the activity degree of magnesium is higher than that of aluminum, the corrosion adapter 200 is connected with the cover plate body 100, and when corrosion occurs, the corrosion adapter 200 containing magnesium with a higher activity degree will be corroded by losing electrons first, which can effectively reduce or prevent the corrosion of the protected metal (such as aluminum), thereby avoiding the corrosion of the cover plate body 100 and damaging the cell structure.

[0028] In some embodiments of the present application, the material of the corrosion adapter 200 can also be other metals or metal alloys with a higher activity degree relative to the activity degrees of the cover plate body 100 and the battery shell, so as to lose electrons first and be corroded when corrosion occurs. For example, the material of the corrosion adapter 200 can be a magnesium alloy, such as a magnesium-aluminum alloy, and the material of the cover plate body 100 can be aluminum, and the activity degree of the magnesium-aluminum alloy is higher than that of aluminum. Of course, the material of the corrosion adapter 200 can also be other magnesium alloys with a higher activity degree than aluminum, which is not limited in the present application.

[0029] The power source 300 can make the surface of the cover plate body 100 at a high potential, which can effectively prevent the cover plate body 100 from being corroded, thereby avoiding the damage to the internal structure of the cell due to the corrosion.

[0030] In the embodiments of the present application, by installing the corrosion adapter 200 and the power source 300 on the surface of the cover plate body 100, the corrosion of the cover plate body 100 can be effectively prevented, and the safety performance of the battery can be improved.

[0031] Please refer to FIGS. 1-2, in an embodiment of the present application, the cover plate assembly further comprises a pole 500 and an explosion-proof valve 600, and the cover plate body 100 is provided with a pole hole 120 and an explosion-proof hole 130 corresponding. The corrosion adapter 200 and the power source 300 are arranged on the cover plate body 100 and located between the pole 500 and the explosion-proof valve 600, which can effectively prevent the explosion-proof valve 600 from being corroded and causing liquid leakage, affecting the safety of the battery in use.

[0032] Please refer to FIG. 1 to FIG. 2, in an embodiment of the present application, the pole column 500 can be a positive pole column and / or a negative pole column, the pole column 500 is connected with the cover plate body 100 through the pole column hole 120. In an embodiment of the present application, the cover plate assembly can further include an insulating plastic piece 510 and an insulating sealing piece 520. The pole column 500 can be fixed in the pole column hole 120 and insulated from the cover plate body 100 by the insulating plastic piece 510 and the insulating sealing piece 520. In an embodiment of the present application, the insulating plastic piece 510 can be made of PVC or PE material, which is not limited in the present application. In an embodiment of the present application, the insulating sealing piece 520 can include a rubber sealing piece, such as styrene butadiene rubber, fluororubber, silicone rubber, propylene rubber, etc., or the insulating sealing piece 520 can include a plastic sealing piece, such as ABS, PVC, PE, PP, PC, etc., which is not limited in the present application.

[0033] In an embodiment of the present application, the cover plate assembly can further include a fixing block 530. The insulating plastic piece 510 and the pole column 500 can be fixed by the fixing block 530, one end of the pole column 500 is connected with the battery tab through the adapter piece, and the other end of the pole column 500 is connected with the external circuit. The fixing block 530 can be an insulating material, for example, an organic insulating material including but not limited to resin, rubber.

[0034] Please refer to FIG. 1 to FIG. 2, in an embodiment of the present application, the explosion-proof valve 600 is shaped to adapt to the shape of the explosion-proof hole 130 and is arranged at the position of the explosion-proof hole 130. When the internal gas pressure of the battery is too large, the explosion-proof sheet on the cover plate body 100 breaks, the internal gas is discharged through the valve port of the explosion-proof valve, which can prevent the battery from exploding due to gas expansion, thereby ensuring the safety of the battery in use.

[0035] Please refer to FIG. 1 to FIG. 2, in an embodiment of the present application, a groove 110 is arranged on the cover plate body 100, the groove 110 is arranged between the pole column 500 and the explosion-proof valve 600. In an embodiment of the present application, the groove 110 and the cover plate body 100 can be formed by one-piece stamping processing. Of course, in other embodiments of the present application, the groove 110 and the cover plate body 100 can also be formed by other processes, which are not limited in the present application.

[0036] Please refer to FIG. 1 to FIG. 2, in an embodiment of the present application, the groove 110 includes a first groove 111 and a second groove 112, the shapes of the first groove 111 and the second groove 112 are respectively adapted to the shapes of the corrosion adapter block 200 and the power source 300, and the corrosion adapter block 200 and the power source 300 are respectively installed in the first groove 111 and the second groove 112.

[0037] Referring to FIGS. 1-2, in an embodiment of the present application, the corrosion adapter 200 can be a cuboid metal block, which can be made of magnesium alloy. The corrosion adapter 200 is installed in the first groove 111. When corrosion occurs, if the corrosion adapter 200 is not installed, the cover plate body 100 at a low potential will be preferentially corroded below the lower limit of the corrosion voltage. After the corrosion adapter 200 is installed on the surface of the cover plate body 100, the corrosion adapter 200 is more likely to lose electrons because the metal of the corrosion adapter 200 is more active than the metal of the cover plate body 100. The corrosion adapter 200 is connected to the cover plate body 100. When corrosion occurs, the corrosion adapter 200 preferentially loses electrons and undergoes oxidation, thereby being preferentially consumed and corroded, which effectively prevents the cover plate body 100 from being consumed and corroded.

[0038] Therefore, by providing the corrosion adapter 200, the battery cell structure can be prevented from being damaged by external corrosion, and the corrosion risk of the cover plate assembly can be reduced. The structure is simple, easy to install, and has good corrosion prevention effect. The battery can be used in special environments without damaging the internal battery cell structure due to corrosion of the cover plate, and can well adapt to various complex use environments.

[0039] It can be understood that the shape of the corrosion adapter 200 is not limited to the cuboid, but can also be other shapes such as a square, a cylinder, etc. The material of the corrosion adapter 200 can also be other metals or metal alloys that are more active than the cover plate body 100 and the battery shell. When corrosion occurs, the corrosion adapter 200 can preferentially lose electrons and be corroded compared to the cover plate body 100.

[0040] In other embodiments, the groove 110 can only include the first groove 111 or the second groove 112. In some embodiments, the groove 110 can only include the second groove 112, which is adapted to the shape of the power source 300. The power source 300 is installed in the second groove 112. At this time, the corrosion adapter 200 can be directly installed on the surface of the cover plate body 100.

[0041] In some embodiments, the groove 110 can only include the first groove 111, which is adapted to the shape of the corrosion adapter 200. The corrosion adapter 200 is installed in the first groove 111. At this time, the power source 300 can be directly installed on the surface of the cover plate body 100.

[0042] Please refer to FIG. 1 to FIG. 2, in an embodiment of the present application, the corrosion adapter 200 is detachably connected with the cover plate body 100. Since the corrosion adapter 200 will be consumed when corrosion occurs, it needs to be replaced when the corrosion adapter 200 is consumed to a certain extent, and through the detachable structure, the new corrosion adapter 200 can be replaced in time to ensure the safety of the battery in complex environment. Specifically, the corrosion adapter 200 can be installed on the surface of the cover plate body 100 or in the first groove 111 through bolt connection or other detachable connection mode.

[0043] In other embodiments, the corrosion adapter 200 can also be directly embedded in the groove 110 of the cover plate body 100 or fixed on the surface of the cover plate body 100, such as when the melting point of the metal part of the corrosion adapter 200 is close to aluminum, it can be fixed on the cover plate body 100 through laser welding.

[0044] Please refer to FIG. 1 to FIG. 2, the power supply 300 is arranged on the cover plate body 100 and located at one side of the corrosion adapter 200, the power supply 300 can be a button cell, the positive electrode of the power supply 300 abuts against the bottom surface of the second groove 112, the negative electrode of the power supply 300 abuts against the side of the fixing part 400 facing the cover plate body 100 and is insulated from the cover plate body 100, the height of the power supply 300 can be set as the distance from the side of the fixing part 400 abutting against the negative electrode of the power supply 300 to the bottom surface of the second groove 112, and the power supply 300 can be fixed in the second groove 112 through the fixing part 400. The positive electrode of the power supply 300 is connected with the cover plate body 100, so that the positive ions in the power supply 300 are transmitted to the cover plate body 100, the cover plate body 100 is at high potential, which can effectively prevent the battery shell and the cover plate body 100 from being corroded to damage the cell structure, thereby improving the safety of the battery in use.

[0045] Please refer to FIG. 1 to FIG. 2, in an embodiment of the present application, the material of the fixing part 400 can be insulating material, which is installed on the surface of the cover plate body 100 where the power supply 300 is arranged and covers the second groove 112, and the fixing part 400 fixes the power supply 300 in the second groove 112.

[0046] In an embodiment of the present application, the fixing part 400 can be a cap, the cap covers the second groove 112, one side of the cap is rotatably connected with the cover plate body 100, and the other side of the cap is fixedly connected with the cover plate body 100. For example, the other side of the cap is clamped and fixed with the cover plate body 100. In an embodiment of the present application, the cap can be made of plastic, such as ABS, PVC, etc., which is not limited in the present application.

[0047] It can be understood that in an embodiment of the present application, the fixing member 400 can also be other structures such as a sticker, etc., and the back is coated with adhesive to be attached to the surface of the cover plate body 100, so as to fix the power supply 300 in the second groove 112.

[0048] Please refer to FIG. 1 to FIG. 2, in another embodiment of the present application, the fixing member 400 can also cover the second groove 112 while partially covering the first groove 111, so as to fix the power supply 300 in the second groove 112 and fix the corrosion adapter block 200 in the first groove 111. The part of the fixing member 400 that partially covers the first groove 111 can be set as a detachable and replaceable connecting structure such as a movable cover, a sticker, etc., so as to facilitate timely replacement of the corrosion adapter block 200.

[0049] Of course, in some other embodiments, the power supply 300 can also be set as a power bank or other forms of independent power supply. For example, when the power supply 300 is a power bank, the positive electrode thereof is connected to the cover plate body 100, so that the positive ions in the power supply 300 are transmitted to the cover plate body 100, making the cover plate body 100 at a high potential. The power bank can be fixed on the cover plate body 100 in a similar manner as the button cell described in the above embodiments, and of course, it can also be connected to the cover plate body 100 or the shell of the battery by adhesion or other means. It can also be understood that when a plurality of batteries including the cover plate assembly are assembled to form a battery pack, the power bank can be installed inside the shell of the battery pack, and the positive electrode thereof can be connected to the cover plate body of one or more batteries.

[0050] The present application also provides a battery, which comprises a shell and the cover plate assembly described in the above embodiments, the shell is internally installed with a battery core assembly, the cover plate assembly is fixedly connected to the shell, and the battery core assembly is electrically connected to the pole 500 on the cover plate assembly. The corrosion adapter block 200 and the power supply 300 can effectively prevent the cover plate and the shell from being corroded, improve the safety performance of the battery core, and ensure the safe use of the battery in various environments.

[0051] The present application also provides a vehicle, which comprises at least one battery, and the battery comprises a shell and the cover plate assembly described in the above embodiments, and the structures of the battery and the cover plate assembly are the same as or similar to those described in the above embodiments, and thus the description is omitted here.

[0052] The cover plate assembly provided by the application can effectively reduce or prevent the corrosion of the protected cover plate body 100 by arranging the corrosion adapter block 200 on the surface of the cover plate body 100. When corrosion occurs, the corrosion adapter block 200 containing the metal with higher activity will be corroded first due to the fact that the metal activity of the corrosion adapter block 200 is greater than that of the cover plate body 100. At the same time, the positive electrode of the power supply 300 is connected to the cover plate body 100, so that the positive ions in the power supply 300 are transmitted to the cover plate body 100, thereby improving the potential of the cover plate body 100 and effectively preventing corrosion. The structure is simple, and the original structure of the battery is changed little. It can adapt to various battery structures such as square batteries and blade batteries, and can achieve good corrosion prevention effect. The corrosion adapter block 200 is easy to disassemble and replace, which can reduce the risk of corrosion and improve the safety of the battery cell. It can effectively avoid the damage of the battery structure when the battery is used in seawater corrosion and other special environments, and ensure the good use performance of the battery in complex environments.

[0053] The above-described embodiments are only used to illustrate the technical solutions of the application, rather than limit them. Although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions described in the foregoing embodiments, or make equivalent replacements to some technical features. These modifications or replacements do not change the essence of the corresponding technical solutions, and should be included in the protection scope of the application.

[0054] In addition to the technical features described in the specification, the remaining technical features are known to those skilled in the art. In order to highlight the innovative features of the application, the remaining technical features will not be described here.

Claims

1. A cover plate assembly, comprising: a cover plate body; a pole post, a pole post hole corresponding to the pole post is provided on the cover plate body, the pole post is connected with the cover plate body through the pole post hole; an explosion-proof valve, provided on the cover plate body; a power supply, a positive pole of the power supply is connected with the cover plate body; a corrosion adapter, provided on the cover plate body and located between the pole post and the explosion-proof valve.

2. The cover plate assembly of claim 1, wherein, a groove is provided on the cover plate body, the groove is provided between the pole post and the explosion-proof valve.

3. The cover plate assembly of claim 2, wherein, the groove comprises a first groove and a second groove, shapes of the first groove and the second groove are respectively adapted to shapes of the corrosion adapter and the power supply, the corrosion adapter and the power supply are respectively installed in the first groove and the second groove.

4. The cover plate assembly of claim 2, wherein, the groove and the cover plate body are formed by one-piece stamping processing.

5. The cover plate assembly of claim 1, wherein, the corrosion adapter and the cover plate body are detachably connected. 6.The cover plate assembly according to claim 3, further comprising a fixing member, the fixing member is installed on a surface of the cover plate body provided with the power supply and covers the second groove, the fixing member fixes the power supply in the second groove.

7. The cover plate assembly of claim 6, wherein, the fixing member is a cap, the cap covers the second groove, one side of the cap is rotatably connected with the cover plate body, and the other side of the cap is fixedly connected with the cover plate body.

8. The cover plate assembly of claim 7, wherein, the other side of the cap is clamped and fixed with the cover plate body.

9. The cover plate assembly of claim 6, wherein, a positive pole of the power supply abuts against a bottom surface of the second groove, and a negative pole of the power supply abuts against a surface of the fixing member facing the cover plate body and is insulated from the cover plate body. 10.A battery, comprising: a shell, an electric core assembly is installed in the shell; the cover plate assembly according to any one of claims 1 to 9, the cover plate assembly is fixedly connected with the shell, and the electric core assembly is electrically connected with the pole post on the cover plate assembly. 11.A vehicle, comprising at least one battery according to claim 10.

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