Battery cover plate

Abstract

The invention relates to the technical field of batteries, and provides a battery cover plate which comprises a cover plate body, the plastic part is arranged on one side of the cover plate body, the plastic part is provided with a first end face deviating from the cover plate body, a groove is formed in the first end face, and the groove is arranged close to the edge of the first end face. The battery cover plate provided by the invention aims to solve the problems that in the prior art, lithium dendrites are easily formed due to long-time accumulation of electrolyte of a battery, and short circuit of the battery is easily caused due to the fact that the lithium dendrites are communicated with the pole and the cover plate body.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery cover plate. BACKGROUND

[0002] During the use of the battery, lithium dendrites are easily formed at the cover plate due to the long-time accumulation of electrolyte, and the lithium dendrites are connected to the pole and the cover plate during the growth process, which leads to short circuit of the battery and affects the use of the battery. SUMMARY

[0003] The present application provides a battery cover plate, which aims to solve the problem that the long-time accumulation of electrolyte in the battery in the prior art easily forms lithium dendrites, and the lithium dendrites are easily connected to the pole and the cover plate, which leads to short circuit of the battery.

[0004] In view of the problems existing in the prior art, the present application provides a battery cover plate, which comprises: a cover plate body; and a plastic part arranged on one side of the cover plate body, the plastic part having a first end face away from the cover plate body, a groove being arranged on the first end face, and the groove being arranged close to the edge of the first end face.

[0005] According to the battery cover plate provided by the present application, the plastic part has a first side wall and a second side wall arranged opposite along the width direction of the cover plate body, the height of the first side wall is greater than the height of the second side wall, and the groove is arranged at the first end face close to the second side wall.

[0006] According to the battery cover plate provided by the present application, a plurality of grooves are arranged on the first end face.

[0007] According to the battery cover plate provided by the present application, each groove extends along the length direction of the first end face.

[0008] According to the battery cover plate provided by the present application, each groove is arranged side by side along the width direction of the first end face; or, each groove is arranged staggered along the width direction of the first end face.

[0009] According to the battery cover plate provided by the present application, each groove extends along the width direction of the first end face.

[0010] According to the battery cover plate provided by the present application, each groove is arranged side by side along the length direction of the first end face; or, each groove is arranged staggered along the length direction of the first end face.

[0011] According to the battery cover plate provided by the present application, the grooves are arranged continuously; and / or, the grooves are arranged discontinuously.

[0012] According to a battery cover provided by the present invention, the groove is a strip-shaped groove, an arc-shaped groove, a curved groove, or a zigzag groove.

[0013] According to a battery cover provided by the present invention, at least the second sidewall is provided with a guide groove.

[0014] The battery cover provided by the present invention can guide lithium dendrites to grow in the groove by setting a groove at the edge of the first end face. In this way, the lithium dendrites will not grow along the plastic part, thereby connecting the cover body and the terminal post and causing a short circuit. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the battery cover plate provided by the present invention; Figure 2 yes Figure 1 A structural diagram from another perspective; Figure 3 yes Figure 1 A schematic diagram of the arrangement of the central groove.

[0017] Reference numerals: 1. Cover plate body; 2. Plastic part; 21. First side wall; 22. Second side wall; 23. First end face; 24. Guide groove; 25. Groove; 3. Pole post. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0019] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0020] In the description of the embodiments of the application, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the application.

[0021] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0022] The embodiments of the application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the application, and cannot be understood as a limitation on the application.

[0023] The following disclosure provides many different embodiments or examples for implementing different structures of the application. In order to simplify the disclosure of the application, the components and settings of specific examples are described below. Of course, they are only examples and the purpose is not to limit the application. In addition, the application can repeatedly refer to the same reference numerals and / or letters in different examples. Such repetition is for the purpose of simplification and clarity, and does not in itself indicate a relationship between the various embodiments and / or settings discussed. In addition, the application provides examples of various specific processes and materials, but those skilled in the art can realize the applicability of other processes and / or the use of other materials.

[0024] The following will be described in detail Figures 1-3 The battery cover plate provided by the description of the application.

[0025] In view of the problem that the electrolyte of the battery is easy to form lithium dendrites for a long time, and the lithium dendrites are easy to cause short circuit of the battery by connecting the pole and the cover body, in view of the problems existing in the prior art, please refer to Figure 1 The embodiment of the application provides a battery cover plate, which comprises a cover body 1 and a plastic part 2.

[0026] The side of the cover plate body 1 is generally provided with a liquid injection hole, an explosion-proof valve and the like, and the other side is provided with a plastic part 2. The cover plate body 1 and the plastic part 2 are provided with mounting holes, and the pole 3 is sequentially mounted through the cover plate body 1 and the plastic part 2, and the end of the pole 3 is exposed on the surface of the plastic part 2. The cover plate is an indispensable part of the battery, which is used to block the end of the battery and plays a sealing and mounting role for the battery.

[0027] In the technical scheme provided by the present application, the plastic part 2 has a first end face 23 away from the cover plate body 1, and the first end face 23 is provided with a groove 25 close to the edge of the first end face 23 for the growth of lithium dendrites. As described above, during the use of the battery, due to the long-term accumulation of electrolyte, lithium dendrites will grow upward along the bottom of the cover plate, and the lithium dendrites will generally first contact the pole 3, and will continuously extend during the growth process, and then grow along the side wall of the plastic part 2 to contact the cover plate body 1. Since the cover plate body 1 and the pole 3 are both conductors, the lithium dendrites will electrically connect the two to cause a short circuit of the battery. It should be noted that the battery cover provided by the present application is provided with a groove 25 at the edge of the first end face 23, so that when the lithium dendrites grow along the pole 3 to approach the groove 25, the lithium dendrites will grow in the groove 25 under the guidance of the groove 25. Since the groove 25 has a certain length and depth, it can provide sufficient growth space for the lithium dendrites, so that the lithium dendrites will not grow along the side wall of the plastic part 2, thereby connecting the cover plate body 1 and the pole 3 to cause a short circuit.

[0028] In the optional embodiment, the plastic part 2 has a first side wall 21 and a second side wall 22 arranged opposite along the width direction of the cover plate body 1. In order to facilitate sealing connection, the height of the first side wall 21 of the plastic part 2 is set to be higher than the height of the second side wall 22. Considering that the height of the first side wall 21 is higher, the lithium dendrites are not easy to grow to connect the cover plate body 1, and therefore at least the first end face 23 close to the second side wall 22 is provided with a groove 25. In other optional embodiments, the height of the first side wall 21 and the second side wall 22 is the same, and the groove 25 can be provided at both edges of the first end face 23 close to the first side wall 21 and the second side wall 22, which is not limited by the present application.

[0029] In order to provide sufficient growth space for the lithium dendrites, a plurality of grooves 25 are provided on the first end face 23, and each groove 25 can be used for the growth of lithium dendrites.

[0030] In the optional embodiment, please refer to Figure 3 The grooves 25 extend along the length direction of the first end face 23. The groove 25 extending along the length direction of the first end face 23 has a larger length, so that more space can be provided for the growth of lithium dendrites.

[0031] Furthermore, in an optional embodiment, the grooves 25 are arranged side-by-side along the width direction of the first end face 23. The grooves 25 can be of the same length or different lengths, and can be arranged in parallel or approximately parallel. In practical applications, the specific number of grooves 25 needs to be determined based on the width of the first end face 23. In another optional embodiment, the grooves 25 are staggered along the width direction of the first end face 23. Correspondingly, the grooves 25 can be of the same length or different lengths, and can be completely staggered or partially staggered; this invention does not limit this. Furthermore, in other embodiments, the grooves 25 can also be arranged at an angle, intersecting, etc., and this invention does not limit this.

[0032] In another embodiment, the grooves 25 all extend along the width direction of the first end face 23. Although in this embodiment, the grooves 25 are limited by the width of the first end face 23 and cannot be set to a large length, a greater number of grooves 25 can be provided.

[0033] Further, in an optional embodiment, the grooves 25 are arranged side by side along the length direction of the first end face 23. The grooves 25 can be of the same length or different lengths, and can be arranged in parallel or approximately parallel. In practical applications, the specific number of grooves 25 needs to be determined based on the length of the first end face 23. In another optional embodiment, the grooves 25 are staggered along the length direction of the first end face 23. Correspondingly, the grooves 25 can be of the same length or different lengths, and can be completely staggered or partially staggered; this invention does not limit this. Furthermore, in other embodiments, the grooves 25 can also be arranged at an angle, intersecting, etc., and this invention does not limit this.

[0034] It should be noted that the first end face 23 is provided with a pole post 3. The groove 25 should be designed so as not to interfere with the pole post 3. The shape and arrangement of the groove 25 are not necessarily regular, and the space should be utilized to the maximum extent.

[0035] It should also be noted that in the technical solution provided by the present invention, the groove 25 can be continuously arranged, that is, in the form of a complete groove. In other embodiments, the groove 25 is discontinuously arranged, that is, it includes multiple segments arranged at intervals. It should be noted that the foregoing description of the groove 25 all treat the groove 25 as a complete individual, and the present invention does not limit whether each groove 25 is continuous or discontinuous.

[0036] Specifically, the groove 25 can have various shapes, such as a strip groove 25, an arc groove 25, a curved groove 25, or a zigzag groove 25. When multiple grooves 25 are provided, the shapes of each groove 25 can be the same or different, and the appropriate setting method is selected mainly according to the specific structure of the plastic part 2.

[0037] Further, please refer to Figure 2 In the technical solution provided by this invention, at least the second sidewall 22 is provided with a guide groove 24, which is used for lithium dendrite growth. It should be noted that the electrolyte generally contacts the electrode post 3 first, and lithium dendrites will grow on the electrode post 3 first. By providing a guide groove 24 on the second sidewall 22, lithium dendrites can first grow in the groove 25. After the lithium dendrites have grown and are growing along the first sidewall 21 or the second sidewall 22, they can continue to grow in the guide groove 24. This provides more sufficient space for lithium dendrite growth and reduces the likelihood of short circuits. In this embodiment, the height of the second sidewall 22 is smaller, therefore the guide groove 24 is preferentially provided. In other optional embodiments, guide grooves 24 can also be provided on both the first sidewall 21 and the second sidewall 22. The arrangement, number, and shape of the guide grooves 24 can refer to the groove 25, and will not be elaborated further in this invention.

[0038] The present invention also provides a battery, including the battery cover as described above. Based on this, the present invention also provides a vehicle, including the battery as described above. Since the main inventive point of the present invention lies in the battery cover, the structures of the battery and the vehicle will not be described in detail further.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery cover, characterized in that, include: Cover plate body; as well as, A plastic part is disposed on one side of the cover plate body. The plastic part has a first end face facing away from the cover plate body. A groove is provided on the first end face, and the groove is disposed close to the edge of the first end face.

2. The battery cover according to claim 1, characterized in that, The plastic part has a first sidewall and a second sidewall that are disposed opposite to each other along the width direction of the cover plate body. The height of the first sidewall is greater than the height of the second sidewall, and the groove is disposed on the first end face near the second sidewall.

3. The battery cover according to claim 1, characterized in that, The first end face is provided with multiple grooves.

4. The battery cover according to claim 3, characterized in that, Each of the grooves extends along the length direction of the first end face.

5. The battery cover according to claim 4, characterized in that, The grooves are arranged side by side along the width direction of the first end face; or, the grooves are arranged alternately along the width direction of the first end face.

6. The battery cover according to claim 3, characterized in that, Each of the grooves extends along the width direction of the first end face.

7. The battery cover according to claim 6, characterized in that, The grooves are arranged side by side along the length of the first end face; or the grooves are arranged alternately along the length of the first end face.

8. The battery cover according to claim 1, characterized in that, The grooves are continuously arranged; and / or the grooves are intermittently arranged.

9. The battery cover according to claim 1, characterized in that, The groove can be a strip-shaped groove, an arc-shaped groove, a curved groove, or a zigzag groove.

10. The battery cover according to claim 2, characterized in that, At least the second sidewall is provided with a guide groove.

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