Battery cover plate and battery

Abstract

The utility model relates to the technical field of battery manufacturing provides a kind of battery cover plate and battery, battery cover plate includes cover plate body, convex structure and accommodating recess, convex structure is protruded by cover plate body to first side, convex structure has the contact end surface of the structural member contact of battery package, contact end surface is equipped with liquid injection hole;Accommodating recess is formed in the surface of cover plate body towards second side, and located in the region corresponding to convex structure;Wherein, liquid injection hole extends along the thickness direction of cover plate body, penetrates convex structure, and is communicated with accommodating recess.The utility model sets up separate convex structure on cover plate body, can be through convex structure pressure bearing, improves the stability and security of battery overall structure, further through the setting of accommodating recess and liquid injection hole, effectively improve the injection amount of electrolyte, it can ensure that battery cell formation, electrolyte is sufficient, improve battery cell impregnation effect, avoid the problem such as lithium precipitation caused by battery cell impregnation insufficient.

Description

Technical Field

[0001] This utility model relates to the technical field of battery manufacturing, and in particular to a battery cover and a battery. Background Technology

[0002] A power battery is a rechargeable battery used to power devices such as electric vehicles, primarily by storing and releasing electrical energy to drive an electric motor.

[0003] In existing technologies, the highest point of a single battery cell is typically located on the terminal post of the cover plate. To ensure sufficient safety performance, battery cells are generally protected from excessive external forces within the battery pack, a design that helps prevent damage to the internal structure. However, this design also results in lower overall strength of the battery pack, potentially affecting its stability and safety under external impact or pressure. Furthermore, this design limits the amount of electrolyte that can be injected at one time, making insufficient electrolyte wetting a potential problem. Utility Model Content

[0004] This invention provides a battery cover and a battery to solve the defects of poor battery structure stability and safety, and limited electrolyte injection volume in the prior art.

[0005] This utility model provides a battery cover plate, comprising: a cover plate body, a protruding structure, and a receiving groove; the protruding structure protrudes from the cover plate body toward a first side, the protruding structure having a contact end face that contacts a structural component of a battery pack, and an injection hole is formed on the contact end face; the receiving groove is formed on the surface of the cover plate body facing a second side opposite to the first side, and is located in the area corresponding to the protruding structure; wherein, the injection hole extends along the thickness direction of the cover plate body, penetrates the protruding structure, and communicates with the receiving groove.

[0006] According to the battery cover provided by this utility model, along the length direction of the cover body, both sides of the protruding structure are provided with pole posts; wherein, along the thickness direction of the cover body, the surface of the pole post facing the first side is coplanar with the contact end surface, or is lower than the contact end surface.

[0007] According to the battery cover provided by this utility model, a plurality of protrusions are provided at intervals along the length direction of the cover body, and at least one of the plurality of protrusions is provided with the liquid injection hole.

[0008] According to the battery cover provided by this utility model, an explosion-proof valve is provided between adjacent protruding structures.

[0009] According to the battery cover provided by this utility model, in the length direction of the cover body, the explosion-proof valve is disposed in the middle of the cover, and the protruding structure is disposed on both sides of the explosion-proof valve.

[0010] According to the battery cover provided by this utility model, along the length direction of the cover body, the electrode posts are disposed at both ends close to the length direction of the cover body, and a plurality of the protruding structures are located between the electrode posts at both ends.

[0011] According to the battery cover provided by this utility model, along the length direction of the cover body, the distance between the poles at both ends and the adjacent protruding structures is equal.

[0012] According to the battery cover provided by this utility model, the width of the protruding structure along the width direction of the cover body is greater than the width of the electrode post.

[0013] According to the battery cover provided by this utility model, the protruding structure is integrally formed with the cover body.

[0014] This utility model also provides a battery, comprising: a housing and a battery cover as described in any of the above claims, wherein the housing has an assembly space for accommodating an electrode assembly; the battery cover is connected to the housing and seals the assembly space.

[0015] The battery cover and battery provided by this utility model have a separate protruding structure on the cover body. This protruding structure makes contact with the structural components on the battery pack, thereby bearing pressure and improving the stability and safety of the overall battery structure. Furthermore, the inclusion of grooves and injection holes effectively increases the amount of electrolyte injected, ensuring sufficient electrolyte during cell formation, improving cell wetting, and avoiding problems such as lithium plating caused by insufficient cell wetting. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model 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 utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is one of the overall structural schematic diagrams of the battery cover provided by this utility model.

[0018] Figure 2 This is the second schematic diagram of the overall structure of the battery cover provided by this utility model in Embodiment 1.

[0019] Figure 3 This is a schematic diagram of the battery structure with the battery cover plate in Embodiment 1 provided by this utility model.

[0020] Figure 4 This utility model provides Figure 3 A schematic diagram of the cross-sectional structure along the AA direction.

[0021] Figure 5 This is a schematic diagram of the overall structure of the battery cover provided by this utility model in Embodiment 2.

[0022] Figure 6 This is a schematic diagram of the battery structure with the battery cover plate in Embodiment 2 provided by this utility model.

[0023] Figure 7 This utility model provides Figure 6 A schematic diagram of the cross-sectional structure along the BB direction.

[0024] Figure label: 10. Battery cover; 11. Cover body; 12. Protruding structure; 121. Liquid injection hole; 122. Receiving groove; 123. Contact end face; 13. Terminal post; 14. Explosion-proof valve; 20. Housing; 21. Assembly space; 22. Electrode group. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of clarifying the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of the embodiments of this utility model, 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 this utility model according to the specific circumstances.

[0028] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0030] In related technologies, battery covers are typically elongated plate-like structures with terminals mounted on them. These terminals are usually positioned at the highest point of each battery cell. While this design helps prevent damage to the internal battery structure, it also results in lower overall battery pack strength and limits the stability and safety of the cells. Furthermore, due to the limited internal space of the casing, the amount of electrolyte injected at one time is limited, which can easily lead to insufficient electrolyte wetting.

[0031] To address the issues in the relevant technologies, the following will be discussed in conjunction with... Figures 1-7The present invention provides a battery cover 10, comprising a cover body 11, a protruding structure 12, and a receiving groove 122. The protruding structure 12 protrudes from the cover body 11 toward a first side and has a contact end face 123 that contacts the structural components of the battery pack. An injection hole 121 is provided on the contact end face 123. The receiving groove 122 is formed on the surface of the cover body 11 facing a second side opposite to the first side and is located in the area corresponding to the protruding structure 12. The injection hole 121 extends along the thickness direction of the cover body 11, penetrates the protruding structure 12, and communicates with the receiving groove 122. Individual cells are combined in parallel and series to form an overall battery pack structure. When the battery pack is subjected to external impact or pressure, the force is transmitted to the cover plate of each individual cell, thereby applying a certain impact or force to the cover plate body 11. This affects the stability and safety of the battery structure. In this embodiment, by setting an individual protrusion structure 12 on the cover plate body 11, the protrusion structure 12 contacts the structural components on the battery pack, thereby bearing pressure through the protrusion structure 12, improving the stability and safety of the overall battery structure. Furthermore, by setting the receiving groove 122 and the electrolyte injection hole 121, the amount of electrolyte injected is effectively increased, which can ensure that there is sufficient electrolyte during cell formation, improve the cell wetting effect, and avoid problems such as lithium plating caused by insufficient cell wetting.

[0032] Specifically, the cover plate body 11 is constructed as a long strip-shaped plate structure. The side of the cover plate body 11 furthest from the inside of the battery cell is designated as the first side, and the side closer to the inside of the battery cell is designated as the second side. A protruding structure 12 is formed on the first side of the cover plate body 11, and in the final connection to form the battery pack structure, the end face of the protruding structure 12 facing the first side is configured as a contact end face 123. The contact end face 123 can contact the structural components on the battery pack, improving the overall structural strength. For example, a liquid cooling plate is provided on the battery pack to achieve temperature management inside the battery pack, and the liquid cooling plate contacts the contact end face 123. This design allows the battery pack to withstand pressure through the protruding structure 12 when subjected to external impact, improving the overall pressure resistance and resulting in higher overall structural stability and safety performance.

[0033] Furthermore, a receiving groove 122 is formed on the second side corresponding to the area where the protruding structure 12 is located. The receiving groove 122 can be used to accommodate the electrode assembly 22, the tabs, and the electrolyte. That is, compared with the traditional battery cell structure, this design forms a receiving groove 122 on the protruding part of the protruding structure 12. This receiving groove 122 expands the internal space of the battery, increases the amount of electrolyte injected at one time, ensures sufficient electrolyte during cell formation, improves the cell wetting effect, avoids problems such as lithium plating caused by insufficient cell wetting, and for cells with low cycle life requirements, even the secondary electrolyte injection can be eliminated, improving process efficiency and reducing costs.

[0034] Among them, the protruding structure 12 is a protruding solid structure, which uses the same material as the cover plate body 11. It achieves a hollow structure inside the protruding part of the protruding structure 12, which forms a receiving groove 122. When the battery housing 20 is installed on the cover plate body 11, one side of the receiving groove 122 faces the assembly space 21 inside the housing 20, thereby providing more electrolyte receiving space for the battery and increasing the amount of electrolyte injected.

[0035] Understandably, in conventional cell cover structures, a protruding structure 12 is often located on the first side of the cover body 11, with the electrode post 13 being the highest protrusion. This results in poor structural stability of the battery pack under external impact, making it prone to structural damage and thus reducing battery safety. This embodiment addresses this by separately providing a protruding structure 12, with the contact end face 123 on the protruding structure 12 contacting the structural components of the battery pack. This enables the battery to withstand external impacts, improving the stability and safety of the battery structure.

[0036] In this embodiment, the number of protruding structures 12 is not limited; it can be a single protruding structure or multiple protruding structures 12. For example, when there is only one protruding structure 12, such as... Figures 1-4 As shown, it is configured as a long, square protrusion 12, and the surface of the protrusion 12 facing the first side serves as a contact end face 123. The contact end face 123 can make contact with the structural components on the battery pack, thereby achieving effective support against external impact or force.

[0037] Furthermore, this embodiment does not limit the shape of the protruding structure 12; it can be a square protruding structure 12, a circular protruding structure 12, or a frustum-shaped or irregular frustum-shaped structure, etc. For ease of understanding and explanation, this embodiment and subsequent embodiments use a square protruding structure 12 as an example for illustration. Figure 1 , Figure 5 As shown.

[0038] In some embodiments, the width of the protruding structure 12 is greater than the width of the pole post 13 along the width direction of the cover plate body 11. By limiting the width of the protruding structure 12 to be greater than that of the pole post 13, the force of the protruding structure 12 is more uniform, thus improving the stability of the overall structure.

[0039] The width of the protruding structure 12 is greater than the width of the electrode post 13 surface, and the total area of ​​the contact end face 123 on one or more protruding structures 12 is greater than the total area of ​​the electrode post 13 surface. This allows the contact end face 123 on the protruding structure 12 to have a larger contact area with the structural components on the battery pack, making the force more uniform.

[0040] Specifically, when both the protruding structure 12 and the pole post 13 are block-shaped structures, the width of the protruding structure 12 is greater than that of the pole post 13 along the width direction of the cover plate body 11. When both the protruding structure 12 and the pole post 13 are cylindrical structures, the radial width of the protruding structure 12 is greater than that of the pole post 13 along the width direction of the cover plate body 11. This allows the protruding structure 12 to have a larger contact area when under pressure, making the force more dispersed and avoiding stress concentration that could lead to structural damage.

[0041] Understandably, by limiting the width of the protrusion structure 12 to be greater than the width of the surface of the pole post 13, it is possible to achieve a more uniform force distribution, thus avoiding stress concentration.

[0042] In some embodiments, the protruding structure 12 is integrally formed with the cover plate body 11. The integral formation of the protruding structure 12 with the cover plate body 11 creates a protrusion 12 on the surface of the cover plate body 11 facing the first side, thereby enabling it to withstand external impacts or forces. Furthermore, the integral forming design improves the overall structural stability.

[0043] Specifically, the protruding structure 12 is integrally formed by stamping, and during stamping, a receiving groove 122 is formed on the second side surface of the cover plate body 11, thereby increasing the capacity for electrolyte.

[0044] It is understandable that in conventional designs, the protrusion structure 12 can be formed by welding or other connection methods. In this embodiment, the integral molding method can improve the structural strength of the protrusion structure 12 and the cover plate body 11, and enhance the stability of the overall cover plate structure.

[0045] In some embodiments, pole posts 13 are provided on both sides of the protruding structure 12 along the length direction of the cover plate body 11; wherein, along the thickness direction of the cover plate body 11, the surface of the pole post 13 facing the first side is coplanar with or lower than the contact end surface 123. In the battery pack structure, structural components (such as liquid cooling plates) on the battery pack contact the highest protruding part on the cover plate body 11 to achieve pressure bearing. This embodiment, by limiting the surface of the pole post 13 to be coplanar with or lower than the contact end surface 123, can effectively bear pressure through the protruding structure 12, thereby improving the stability of the overall battery structure.

[0046] Specifically, one approach is to have the surface of the pole post 13 facing the first side coplanar with the contact end face 123 along the thickness direction of the cover plate body 11. In this approach, the surface of the pole post 13 will also contact the structural components on the battery pack. Since the contact end face 123 can contact the structural components on the battery pack at the same time, the load on the surface of the pole post 13 is smaller, resulting in a smaller actual force on the pole post 13 and a smaller impact from external forces.

[0047] Another approach is that, along the thickness direction of the cover plate body 11, the surface of the pole post 13 facing the first side is lower than the contact end face 123. This allows the pole post 13 to achieve contact and load bearing through the contact end face 123 when it comes into contact with structural components on the battery pack, while the pole post 13 is not affected by external forces, thereby improving the stability of the overall structure.

[0048] It is understandable that in both of the above methods, the contact end face 123 on the protruding structure 12 achieves contact and load-bearing with the structural components on the battery pack. The load-bearing capacity of the protruding structure 12 can improve the stability and impact resistance of the overall structure, avoid the impact of external impacts on the internal structure of the battery, and improve the safety of the battery.

[0049] In some embodiments, such as Figures 5-7 A plurality of protruding structures 12 are provided at intervals along the length of the cover plate body 11, and at least one of the protruding structures 12 is provided with an injection hole 121. The arrangement of the plurality of protruding structures 12 can further increase the structural strength of the cover plate body 11.

[0050] Specifically, the cover plate body has two or more protruding structures 12. The multiple protruding structures 12 have the same protrusion height along the thickness direction of the cover plate body 11. The same protrusion height makes the contact end face 123 of each protruding structure 12 coplanar, thereby realizing the effect of multiple protruding structures 12 supporting each other and improving the overall structural strength and stability.

[0051] Understandably, multiple protruding structures 12 are integrally formed on the cover plate body 11 by stamping. These protruding structures 12 strengthen the structure of the cover plate body 11, resulting in higher overall structural strength. Specifically, the protruding structures 12 increase the overall stiffness and bending resistance of the cover plate. This is because the protrusions alter the stress distribution of the cover plate, dispersing stress in localized areas, reducing bending deformation on a single plane, and providing localized reinforcement in areas requiring strengthening. For example, the cover plate may have some weak areas; the protruding structures 12 can provide additional support to these areas, thereby improving overall strength and stability. Furthermore, when the cover plate needs to withstand external impacts, the protruding structures 12 can help disperse the impact force, reducing the risk of external forces acting directly on a single location, thus improving impact resistance.

[0052] Of course, in this embodiment, each protrusion structure 12 is hollow inside (i.e., it accommodates the groove 122 structure), which can effectively reduce the overall weight of the cover plate and avoid the excessive weight caused by multiple protrusion structures 12.

[0053] In some embodiments, an explosion-proof valve 14 is provided between adjacent protrusions 12. The explosion-proof valve 14 is located between the protrusions 12, and a pressure relief channel can be formed between the protrusions 12, thereby improving the battery pressure relief efficiency and enhancing battery safety.

[0054] Specifically, the area of ​​the raised structure 12 has a local reinforcement effect, and the explosion-proof valve 14 is located between the raised structures 12. This enables the explosion-proof valve 14 to have higher stability, and in the event of reheat runaway, it can form a stable pressure relief channel through the raised structure to achieve rapid pressure relief and improve the safety performance of the battery.

[0055] In conjunction with the above embodiments, the explosion-proof valve 14 is located in the middle of the cover plate along the length of the cover plate body 11, and the protruding structures 12 are located on both sides of the explosion-proof valve 14. By limiting the explosion-proof valve 14 to the middle position, the stability of the structure can be further improved, and the shape design and space utilization can be optimized.

[0056] Specifically, the explosion-proof valve 14 is typically used to prevent safety issues caused by excessive internal pressure. Its central location helps to evenly distribute internal pressure. Raised structures 12 on both sides of the explosion-proof valve 14 help reinforce the sides of the cover plate, forming a symmetrical reinforcement design. This effectively disperses stress generated by internal pressure or external impact, reducing local stress concentration and thus improving the overall structural stability. Furthermore, the explosion-proof valve 14 typically bears significant pressure, making the areas on either side of it weak points in the cover plate. By providing raised structures 12 on both sides of the explosion-proof valve 14, the structural strength of these weak areas can be effectively enhanced, increasing the load-bearing capacity of the cover plate body 11 and reducing the risk of excessive deformation or localized failure.

[0057] Furthermore, by placing the protruding structures 12 on both sides of the explosion-proof valve 14, the shape of the cover body 11 can be made more reasonable and symmetrical, while avoiding the waste of space near the explosion-proof valve 14. In terms of design, this method can effectively utilize space and make the cover more aesthetically pleasing.

[0058] In other words, the layout design of the explosion-proof valve 14 and the raised structure 12 can not only improve the structural strength of the cover plate, but also effectively improve the functionality and safety of the explosion-proof valve 14, ensuring that the cover plate can better protect the internal equipment and avoid accidents when subjected to high pressure or external impact.

[0059] In conjunction with the above embodiments, along the length direction of the cover plate body 11, the electrode posts 13 are disposed at both ends close to the length direction of the cover plate body 11, and multiple protrusions 12 are located between the electrode posts 13 at both ends. By disposing of multiple protrusions between the electrode posts 13, the overall strength, stability, impact resistance, and thermal management performance of the cover plate body 11 are enhanced, thereby ensuring that the battery has higher safety and reliability during use.

[0060] Understandably, placing the terminals 13 at both ends of the cover body 11 ensures the stability of the battery's internal structure. Since the terminals 13 are the main electrical connection components of the battery, fixing them to both ends of the cover provides better structural support. The protruding structures 12 located between the terminals 13 at both ends further enhance the overall rigidity and stability of the cover, preventing deformation or breakage under external forces. When the terminals 13 are located at both ends of the cover, stress concentration usually occurs. By setting multiple protruding structures 12 between the terminals 13, these stresses can be effectively dispersed, preventing excessive stress accumulation in the middle of the cover, thus avoiding localized deformation or damage during long-term use. This helps improve the durability and structural reliability of the cover.

[0061] Furthermore, the multiple protruding structures 12 between the pole posts 13 can make the strength distribution of the cover plate body 11 more uniform. This design can effectively utilize the compressive strength of the material, reduce possible weak points, and in particular, prevent the middle of the cover plate from cracking due to excessive pressure or impact.

[0062] In conjunction with the above embodiments, along the length of the cover plate body 11, the distance between the pole posts 13 at both ends and the adjacent protruding structures 12 is equal. By limiting the distance between the pole posts 13 and the protruding structures 12, the force is more evenly distributed, and the overall structural stability is further improved.

[0063] Specifically, such as Figure 5 As shown, the cover plate body 11 has a first pole post 13 and a second pole post 13 at both ends. Correspondingly, a first protrusion and a second protrusion are provided between the first pole post 13 and the second pole post 13. The protrusion height of the first protrusion is the same as the protrusion height of the second protrusion, and the distance between the first protrusion and the first pole post 13 is equal to the distance between the second protrusion and the second pole post 13. This optimizes the stress distribution, making it more uniformly stressed when subjected to external forces.

[0064] Understandably, when the distance between the poles 13 at both ends and the adjacent protruding structures 12 is equal, the structure of the cover plate body 11 can maintain a more uniform stress distribution when under stress. This design effectively avoids local stress concentration, thereby reducing the risk of the cover plate bending or deforming and improving the overall structural stability and durability. Furthermore, the equal spacing makes the entire cover plate structure more symmetrical, which helps to improve the overall strength of the cover plate. A symmetrical structure allows the cover plate to respond more harmoniously to external impacts or internal pressures, reducing structural imbalance or localized damage caused by asymmetrical design.

[0065] Furthermore, when the spacing is uniform, each part of the cover plate body 11 can achieve a more balanced heat distribution. This helps to improve heat conduction efficiency, avoid local overheating or uneven cooling, ensure that the battery maintains a more stable temperature during operation, effectively extend battery life, and improve safety.

[0066] This utility model also provides a battery, such as Figure 3 , Figure 4 , Figure 6 , Figure 7 As shown, the device includes a housing 20 and a battery cover 10 provided in any of the above embodiments. The housing 20 has an assembly space 21 for accommodating the electrode assembly 22. The battery cover 10 is connected to the housing 20 and seals the assembly space 21.

[0067] Specifically, the casing 20 has a flat, square main structure with an opening at the top. The battery cover 10 is located at the opening and seals it, creating a sealed assembly space 21 inside. The receiving groove 122 on the battery cover 10 communicates with the assembly space 21, expanding the assembly space 21. This allows electrolyte to be injected through the injection hole 121, effectively increasing the amount of electrolyte injected into the receiving groove 122.

[0068] The battery provided in this example has the battery cover 10 of any of the aforementioned embodiments. Therefore, the battery in this example has the characteristic effects of each of the aforementioned battery cover 10 embodiments. To avoid redundancy in the description of the effects, they will not be repeated here.

[0069] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment, by providing a separate protruding structure 12 on the cover plate body 11, achieves contact with the structural components on the battery pack, thereby enabling the protruding structure 12 to bear pressure, improving the stability and safety of the overall battery structure. Furthermore, by providing the receiving groove 122 and the injection hole 121, the amount of electrolyte injected is effectively increased, ensuring sufficient electrolyte during cell formation, improving the cell wetting effect, and avoiding problems such as lithium plating caused by insufficient cell wetting. Furthermore, by placing the explosion-proof valve 14 between the protruding structures 12, the structural strength of these weak areas can be effectively enhanced, improving the load-bearing capacity of the cover plate body 11 and reducing the risk caused by excessive deformation or local failure.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model 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. Such 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 this utility model.

Claims

1. A battery cover, characterized in that, include: Cover plate body; A raised structure protrudes from the cover plate body toward the first side. The raised structure has a contact end face that contacts the structural components of the battery pack, and an injection hole is provided on the contact end face. A receiving groove is formed on the surface of the cover plate body facing the second side opposite to the first side, and is located in the area corresponding to the protruding structure; The injection hole extends along the thickness direction of the cover plate body, penetrates the protruding structure, and communicates with the receiving groove.

2. The battery cover according to claim 1, characterized in that, Along the length of the cover plate body, pole posts are provided on both sides of the protruding structure; Wherein, along the thickness direction of the cover plate body, the surface of the pole facing the first side is coplanar with the contact end surface, or is lower than the contact end surface.

3. The battery cover according to claim 1, characterized in that, A plurality of protruding structures are provided at intervals along the length of the cover plate body, and at least one of the plurality of protruding structures is provided with the injection hole.

4. The battery cover according to claim 3, characterized in that, An explosion-proof valve is provided between adjacent protruding structures.

5. The battery cover according to claim 4, characterized in that, Along the length of the cover plate body, the explosion-proof valve is located in the middle of the cover plate, and the protruding structure is located on both sides of the explosion-proof valve.

6. The battery cover according to claim 2, characterized in that, Along the length of the cover plate body, the pole posts are located at both ends close to the length of the cover plate body, and a plurality of the protruding structures are located between the pole posts at both ends.

7. The battery cover according to claim 6, characterized in that, Along the length of the cover plate body, the distance between the poles at both ends and the adjacent protruding structures is equal.

8. The battery cover according to claim 6, characterized in that, Along the width direction of the cover plate body, the width of the protruding structure is greater than the width of the pole post.

9. The battery cover according to claim 1, characterized in that, The protruding structure is integrally formed with the cover plate body.

10. A battery, characterized in that, include: A housing having an assembly space for accommodating the electrode assembly; The battery cover according to any one of claims 1-9, wherein the battery cover is connected to the housing and seals the assembly space.

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