Cover plate assembly, battery and vehicle

Abstract

The utility model provides a cover plate assembly, a battery and a vehicle. The cover plate assembly comprises a cover plate body, pole holes are correspondingly formed in the cover plate body, and the poles penetrate through the pole holes to be connected with the cover plate body; the anti-explosion valve is arranged on the cover plate body; the positive electrode of the external power supply is connected to the cover plate body; and the corrosion switching block is arranged between the pole and the anti-explosion valve. When the battery is corroded when working in a complex environment, the corrosion switching block is corroded preferentially due to the fact that the metal activity degree of the corrosion switching block relative to the cover plate body is higher, so that damage to the battery structure caused by corrosion of the cover plate body is avoided, the corrosion switching block is detachable and convenient to replace in time, and use safety is guaranteed; the external power supply can improve the potential of the surface of the cover plate, so that the interior of the cover plate body can be prevented from being corroded, the cover plate body can be prevented from being corroded by arranging the corrosion switching block and the external power supply, and the use safety of the battery in a complex environment is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and in particular relates to a battery cover assembly, a battery and a vehicle. Background Art

[0002] As the demand for power batteries continues to increase, the consideration of battery safety has become more stringent. Since electric vehicles need to experience various working conditions, they will inevitably experience harsh environments such as high salt fog places, which will affect the safety of battery use. For example, batteries immersed in seawater will cause corrosion of the battery cover, resulting in leakage and other damage to the battery structure, affecting the safety performance of the battery. How to ensure that the battery still maintains good reliability when used in harsh environments is a difficult problem that battery research and development needs to continuously overcome. Utility Model Content

[0003] In view of the above shortcomings of the prior art, the purpose of the utility model is to provide a cover assembly, a battery and a vehicle, which can ensure that the battery will not be damaged by corrosion of the cover and the shell in some harsh environments such as immersion in seawater, thereby improving the safety of the battery when used in complex environments.

[0004] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a cover plate assembly, comprising:

[0005] A cover body; a pole, wherein the cover body is provided with a pole hole correspondingly, and the pole passes through the pole hole and is connected to the cover body;

[0006] Explosion-proof valve, arranged on the cover body

[0007] An external power source, wherein the positive electrode of the external power source is connected to the cover body;

[0008] A corrosion adapter block is arranged between the pole and the explosion-proof valve.

[0009] According to an embodiment of the utility model, a groove is provided on the cover plate body, and the groove is provided between the pole and the explosion-proof valve.

[0010] According to one embodiment of the utility model, the groove includes a first groove and a second groove, the shapes of the first groove and the second groove are respectively adapted to the shapes of the corrosion adapter block and the external power supply, and the corrosion adapter block and the external power supply are respectively installed in the first groove and the second groove.

[0011] According to an embodiment of the present invention, the groove and the cover plate body are formed by integral stamping.

[0012] According to an embodiment of the utility model, the corrosion adapter block and the cover plate body are detachably connected.

[0013] According to an embodiment of the utility model, the cover assembly further includes a fixing member, which is mounted on the surface of the cover body on which the external power supply is disposed and covers the second groove, and the fixing member fixes the external power supply in the second groove.

[0014] According to an embodiment of the present invention, the fixing member is a cover cap, which covers the second groove, one side of the cover cap is rotatably connected to the cover body, and the other side of the cover cap is clamped and fixed to the cover body.

[0015] According to an embodiment of the present invention, the positive pole of the external power source abuts against the bottom surface of the second groove, and the negative pole of the external power source abuts against a surface of the fixing member facing the cover body and is insulated from the cover body.

[0016] The utility model also provides a battery, comprising:

[0017] A housing, wherein a battery cell assembly is installed in the housing;

[0018] As described in the above embodiment, the cover plate assembly is fixedly connected to the shell, and the battery cell assembly is electrically connected to the pole on the cover plate assembly.

[0019] The utility model also provides a vehicle, which comprises at least one battery as described in the above embodiment.

[0020] The utility model proposes a cover plate assembly, a battery and a vehicle, wherein a detachable corrosion adapter block is installed on the surface of the cover plate body. When external corrosion occurs, since the metal activity of the corrosion adapter block is greater than that of the cover plate, when corrosion occurs, the corrosion adapter block with a higher activity will lose electrons first and be corroded, which can effectively reduce or prevent the corrosion of the protected metal, that is, can effectively prevent the cover plate body from being corroded and causing leakage; the detachable corrosion adapter block is easy to replace at any time to ensure that the cover plate body will not be corroded during the use of the battery; at the same time, an external power supply is provided, and its positive pole is connected to the cover plate body, so that the positive ions in the external power supply are transferred to the cover plate body, thereby increasing the potential of the cover plate body to prevent corrosion. The utility model has a simple structure and good anti-corrosion effect, reduces the risk of cover plate corrosion, improves the safety of the battery cell, and can effectively improve the safety of the battery when used in complex environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is an overall structural diagram of an embodiment of the utility model;

[0023] Figure 2 This is a three-dimensional structural exploded view of an embodiment of the utility model.

[0024] Description of labels:

[0025] 100, cover body; 200, corrosion adapter block; 300, external power supply; 400, fixing piece; 500, pole; 600, explosion-proof valve;

[0026] 110, groove; 120, pole hole; 130, explosion-proof hole;

[0027] 111, first groove; 112, second groove;

[0028] 510, insulating plastic parts; 520, insulating seal; 530, fixing block. DETAILED DESCRIPTION

[0029] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0030] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention. Therefore, the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0031] During the use of the battery, it is inevitable to encounter some complex environments such as high salt fog places. The complex external environment will cause corrosion to the battery cover. After the battery cover is corroded, leakage may occur, which will damage the internal structure of the battery cell and affect the safety of battery use.

[0032] See also Figure 1 to Figure 2The utility model provides a cover plate assembly, including a cover plate body 100, a corrosion adapter block 200, an external power source 300 and a fixing member 400. The corrosion adapter block 200 and the external power source 300 are arranged on a side of the cover plate body 100 away from the inside of the battery, and the fixing member 400 is installed on the surface of the cover plate body 100 on which the external power source 300 is arranged, and is used to fix the external power source 300. The cover body 100 is connected to the battery shell and seals the cell structure in the battery shell; the corrosion adapter block 200 is an active metal, for example, the corrosion adapter block 200 is metal magnesium, and the shell and the cover body 100 are aluminum. Since the activity of magnesium is higher than that of aluminum, the corrosion adapter block 200 is connected to the cover body 100. When corrosion occurs, the more active corrosion adapter block 200 will lose electrons first and be corroded, which can effectively reduce or prevent the corrosion of the protected metal (aluminum) and prevent the cover body 100 from being corroded and destroying the cell structure; the external power supply 300 can make the surface of the cover body 100 at a high potential to prevent internal corrosion and avoid leakage due to corrosion. By installing the corrosion adapter block 200 and the external power supply 300 on the surface of the cover body 100, the corrosion of the cover body 100 can be effectively prevented, and the safety performance of the battery can be improved.

[0033] See also Figure 1 to Figure 2 In one embodiment of the utility model, the cover assembly further includes a pole 500 and an explosion-proof valve 600, and the cover body 100 is provided with a pole hole 120 and an explosion-proof hole 130. The corrosion adapter block 200 and the external power supply 300 are arranged between the pole 500 and the explosion-proof valve 600, which can effectively prevent the explosion-proof valve 600 from being corroded and leaking, thereby affecting the safety of battery use.

[0034] See also Figure 1 to Figure 2 In one embodiment of the utility model, the pole 500 can be a positive pole and / or a negative pole. The pole 500 passes through the pole hole 120 and is connected to the cover body 100. The pole 500 is fixed in the pole hole 120 and insulated from the cover body 100 by an insulating plastic part 510 and an insulating seal 520. The insulating plastic part 510 and the pole 500 are fixed by a fixing block 530. One end of the pole 500 is connected to the battery ear through an adapter, and the other end is connected to an external circuit.

[0035] See also Figure 1 to Figure 2 In one embodiment of the utility model, the shape of the explosion-proof valve 600 is adapted 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 high, the explosion-proof plate on the cover body 100 ruptures, and the internal gas is discharged through the explosion-proof valve port, which can prevent the battery from exploding due to inflation and ensure the safety of battery use.

[0036] See also Figure 1 to Figure 2In one embodiment of the present invention, a groove 110 is provided on the cover body 100. The groove 110 is between the pole 500 and the explosion-proof valve 600. The groove 110 and the cover body 100 can be formed by integral stamping.

[0037] See also Figure 1 to Figure 2 In a specific embodiment, 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 external power supply 300. The corrosion adapter block 200 and the external power supply 300 are respectively installed in the first groove 111 and the second groove 112.

[0038] See also Figure 1 to Figure 2 In one embodiment of the utility model, the corrosion adapter block 200 is a rectangular metal block made of magnesium alloy, and the corrosion adapter block 200 is installed in the first groove 111. When corrosion occurs, if the voltage is lower than the lower limit of the corrosion voltage, if there is no corrosion adapter block 200, the low-potential cover body 100 will be corroded first; after the corrosion adapter block 200 is installed on the surface of the cover body 100, the corrosion adapter block 200 is more likely to lose electrons due to the higher metal activity of the corrosion adapter block 200 relative to the cover body 100, and is connected to the cover body 100. When corrosion occurs, the corrosion adapter block 200 loses electrons first to undergo oxidation reaction, and is first consumed and corroded, which can effectively prevent the cover body 100 from being consumed, thereby preventing the cover body 100 from being corroded, preventing the battery cell structure from being damaged by external corrosion, and reducing the corrosion risk of the cover assembly. It has a simple structure, is easy to install, and has a good anti-corrosion effect, ensuring that the internal battery cell structure will not be damaged due to cover corrosion when the battery is used in a special environment, and can adapt well to a variety of complex use environments. It can be understood that the shape of the corrosion adapter block 200 here is not limited to the rectangular parallelepiped, and can also be other shapes such as a cube, a cylinder, etc.; the material of the corrosion adapter block 200 can also be other metals with higher activity than the cover body 100 and the shell, which can preferentially lose electrons and be corroded when corrosion occurs on the surface of the cover body 100.

[0039] In other embodiments, there may be only one groove 110 , which is adapted to the shape of the external power supply 300 , and the external power supply 300 is fixed in the groove 110 . In this case, the corrosion adapter block 200 may be directly installed on the surface of the cover body 100 .

[0040] See also Figure 1 to Figure 2In one embodiment of the utility model, the corrosion adapter block 200 is detachably connected to the cover body 100. Since the corrosion adapter block 200 will be consumed when corrosion occurs, it needs to be replaced when the corrosion adapter block 200 is consumed to a certain extent. The detachable structure can facilitate timely replacement of a new corrosion adapter block 200 to ensure the safety of the battery in a complex environment. Specifically, the corrosion adapter block 200 can be installed on the surface of the cover body 100 or in the first groove 111 by bolt connection or other methods.

[0041] In other embodiments, the corrosion adapter block 200 may also be directly embedded in the groove 110 of the cover body 100 or fixed to the surface of the cover body 100. For example, when the melting point of the metal part of the corrosion adapter block 200 is close to that of aluminum, it can be fixed to the cover body 100 by laser welding.

[0042] See also Figure 1 to Figure 2 The external power supply 300 is arranged on one side of the corrosion adapter block 200. The external power supply 300 can be a button battery. The positive electrode of the external power supply 300 abuts against the bottom surface of the second groove 112. The negative electrode of the external power supply 300 abuts against the side of the fixing member 400 facing the cover body 100 and is insulated from the cover body 100. The height of the external power supply 300 is the distance from the side of the fixing member 400 abutting against the negative electrode of the external power supply 300 to the bottom surface of the second groove 112. The external power supply 300 is fixed in the second groove 112 by the fixing member 400. The positive electrode of the external power supply 300 is connected to the cover body 100, so that the positive ions in the external power supply 300 are transferred to the cover body 100, so that the cover body 100 is at a high potential, which can effectively prevent the shell and the cover body 100 from being corroded and damaging the battery structure, thereby improving the safety of battery use.

[0043] See also Figure 1 to Figure 2 In one embodiment of the present invention, the fixing member 400 is an insulating material, installed on the surface of the cover body 100 where the external power supply 300 is provided, and covers the second groove 112 , and the fixing member 400 fixes the external power supply 300 in the second groove 112 .

[0044] In a specific embodiment, the fixing member 400 may be a cap, which covers the second groove 112, one side of the cap is rotatably connected to the cover body 100, and the other side is fixedly engaged with the cover body 100. It is understandable that the fixing member 400 may also be other structures such as a sticker, etc., with adhesive on the back and attached to the surface of the cover body 100 to fix the external power supply 300 in the second groove 112.

[0045] See also Figure 1 to Figure 2In another embodiment of the utility model, the fixing member 400 may also partially cover the first groove 111 while covering the second groove 112, so as to fix the external 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 may be provided as a detachable and replaceable connection structure such as a movable cover, a sticker, etc., so as to facilitate timely replacement of the corrosion adapter block 200.

[0046] Of course, in some other embodiments, the external power source 300 can also be set as other forms of independent power sources such as a power bank. For example, when the external power source 300 is a power bank, its positive electrode is connected to the cover body 100, so that the positive ions in the external power source 300 are transferred to the cover body 100, so that the cover body 100 is at a high potential. The power bank can be fixed to the cover body 100 in a similar manner to the button battery described in the above embodiment. Of course, it can also be connected to the cover body 100 or the battery housing by bonding or the like. It can also be understood that when a battery pack is formed by assembling a plurality of batteries including the cover assembly, the power bank can be installed inside the housing of the battery pack, and its positive electrode can be connected to the cover body of one or more batteries.

[0047] The utility model also provides a battery, comprising a housing and the cover plate assembly described in the above embodiment, wherein a cell assembly is installed in the housing, the cover plate assembly is fixedly connected to the housing, and the cell assembly is electrically connected to the pole 500 on the cover plate assembly. The corrosion adapter block 200 and the external power supply 300 can effectively prevent the cover plate and the housing from being corroded, improve the safety performance of the cell, and ensure the safety of the battery in various environments.

[0048] The utility model also provides a vehicle, which includes at least one battery, and the battery includes a shell and the cover assembly described in the above embodiment. The structure of the battery and the cover assembly is the same as or similar to the structure described in the above embodiment, and will not be repeated here to avoid repetition.

[0049] The cover assembly provided by the utility model is provided with a corrosion adapter block 200 on the surface of the cover body 100. When corrosion occurs, since the metal activity of the corrosion adapter block 200 is greater than that of the cover body 100, the corrosion adapter block 200 with a higher activity will lose electrons first and be corroded, which can effectively reduce or prevent the corrosion of the protected cover body 100. At the same time, an external power supply 300 with a positive electrode connected to the cover body 100 is provided, so that the positive ions in the external power supply 300 are transferred to the cover body 100, thereby improving the potential of the cover body 100 and effectively preventing corrosion. The utility model has a simple structure and makes little change to the original structure of the battery. It can adapt to various battery structures such as square batteries and blade batteries, and can achieve good anti-corrosion effect. The corrosion adapter block 200 is easy to disassemble and replace, which can reduce the risk of corrosion, improve the safety of the battery cell, and effectively avoid the battery structure from being damaged when the battery is used in special environments such as seawater corrosion, thereby ensuring the good performance of the battery in complex environments.

[0050] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention.

[0051] Except for the technical features described in the specification, the other technical features are known technologies to those skilled in the art. In order to highlight the innovative features of the present utility model, the other technical features will not be described in detail here.

Claims

1. A cover plate assembly, characterized in that: include: Cover plate body; A pole, wherein a pole hole is correspondingly arranged on the cover body, and the pole passes through the pole hole and is connected to the cover body; An explosion-proof valve is arranged on the cover plate body; An external power source, wherein the positive electrode of the external power source is connected to the cover body; A corrosion adapter block is arranged between the pole and the explosion-proof valve.

2. The cover plate assembly according to claim 1, characterized in that: The cover plate body is provided with a groove, and the groove is provided between the pole and the explosion-proof valve.

3. The cover plate assembly according to claim 2, characterized in that: The groove includes a first groove and a second groove. The shapes of the first groove and the second groove are respectively adapted to the shapes of the corrosion adapter block and the external power supply. The corrosion adapter block and the external power supply are respectively installed in the first groove and the second groove.

4. The cover plate assembly according to claim 2, characterized in that: The groove and the cover plate body are formed by integral stamping.

5. The cover plate assembly according to claim 1, characterized in that: The corrosion adapter block and the cover plate body are detachably connected.

6. The cover plate assembly according to claim 3, characterized in that: It also includes a fixing member, which is installed on the surface of the cover body where the external power supply is provided and covers the second groove, and the fixing member fixes the external power supply in the second groove.

7. The cover plate assembly according to claim 6, characterized in that: The fixing member is a cover cap, which covers the second groove. One side of the cover cap is rotatably connected to the cover plate body, and the other side of the cover cap is fixedly engaged with the cover plate body.

8. The cover plate assembly according to claim 6, characterized in that: The positive electrode of the external power source abuts against the bottom surface of the second groove, and the negative electrode of the external power source abuts against a surface of the fixing member facing the cover body and is insulated from the cover body.

9. A battery, characterized in that: include: A housing, wherein a battery cell assembly is installed in the housing; The cover plate assembly as described in any one of claims 1 to 8, wherein the cover plate assembly is fixedly connected to the shell, and the battery cell assembly is electrically connected to the pole on the cover plate assembly.

10. A vehicle, characterized in that: The vehicle comprises at least one battery as claimed in claim 9.

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