Lower plastic, end cover assembly and battery
By designing grooves and flow-guiding surfaces in the lower plastic layer, the problem of electrolyte residue is solved, enabling the reuse of electrolyte and improving battery safety.
Patent Information
- Application Number
- CN202423006570.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2034-12-03
AI Technical Summary
There is a gap between the existing cell cover and the lower plastic, which leads to electrolyte residue, resulting in waste and safety hazards.
Design a plastic substrate with grooves and guide surfaces along its length to contain and drain electrolyte, preventing its residue, and to improve structural strength through a partition plate.
It enables the reuse of electrolyte, reduces costs, improves battery safety, and prevents corrosion and short circuits.
Smart Images
Figure CN223712988U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of battery end cover, in particular to a lower plastic, an end cover assembly and a battery. BACKGROUND
[0002] In the related art, the existing cell cover plate is generally insulatedly connected with the winding core pole piece through the lower plastic, but there is a gap between the lower plastic and the cover plate, which causes the gap to easily retain electrolyte after the cell is injected with electrolyte, and the retained electrolyte cannot play a role, resulting in waste of electrolyte, which has room for improvement. SUMMARY
[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a lower plastic that can reduce the waste of electrolyte and reduce costs.
[0004] The present application also provides an end cover assembly.
[0005] The present application also provides a battery.
[0006] According to the lower plastic of the first aspect of the present application, the lower plastic includes a body, both ends of the body in the length direction are convex along a first direction to form two first support portions; the first support portion has a groove recessed from the body along the first direction, the groove has two first inner sides, the two first inner sides are oppositely arranged in the length direction of the lower plastic, and each first inner side of the groove extends obliquely in a direction away from the other first inner side of the groove to form a flow guide surface along a second direction, the second direction is opposite to the first direction and parallel to the thickness direction of the lower plastic.
[0007] According to the lower plastic of the present application, by defining the groove with the flow guide surface in the support portion, the groove can accommodate the electrolyte retained between the lower plastic and the end cover during the battery injection process, and the electrolyte in the groove can flow out along the flow guide surface, which can discharge the electrolyte retained between the lower plastic and the end cover, facilitate the collection of the retained electrolyte, facilitate the reuse of the electrolyte, reduce the waste of electrolyte, and reduce costs. Compared with the scheme of providing a flow guide through hole in the groove bottom to continuously guide the retained electrolyte into the battery interior, the corrosion or short circuit of the cell and the end cover due to the metal wire or other metal foreign matter passing through the flow guide through hole can be prevented, and the structural strength of the support portion can be improved, and the safety of the battery operation can be improved.
[0008] According to some embodiments of the present application, the groove includes an inner bottom surface, and in the length direction of the lower plastic, the size of the inner bottom surface is smaller than the size of the opening of the groove.
[0009] According to some embodiments of the present application, the inclination angle of the flow guide surface is α, and α≥0.1°.
[0010] According to some embodiments of the present application, at least one partition plate is arranged in the groove, and the partition plate separates the groove into a plurality of groove segments.
[0011] In some embodiments, the partition plate is arranged in a spaced manner with the inner bottom surface of the groove, and the plurality of groove segments are in communication with each other.
[0012] In some embodiments, the partition plate is in abutment with the bottom wall of the groove.
[0013] According to some embodiments of the present application, the lower plastic further has at least one second support portion, the second support portion is located between two first support portions, and the second support portion is provided with the groove.
[0014] According to some embodiments of the present application, the lower plastic is an integrally formed insulation member.
[0015] According to the end cover assembly of the second aspect of the embodiments of the present application, the end cover and the lower plastic according to the first aspect of the embodiments of the present application are included, the lower plastic is used for the end cover, the end cover has a liquid injection hole, the lower plastic is arranged on one side of the end cover, and the first support portion (21) protrudes away from the end cover.
[0016] According to the end cover assembly of the embodiments of the present application, by using the above-mentioned lower plastic, the electrolyte remaining in the end cover assembly can be discharged, and the remaining electrolyte can be conveniently collected, which is beneficial to realize the reuse of the electrolyte and can reduce the waste of the electrolyte.
[0017] According to the battery of the third aspect of the embodiments of the present application, the end cover assembly of the second aspect of the embodiments of the present application is included, by using the above-mentioned end cover assembly, the electrolyte remaining in the end cover assembly can be discharged, and the remaining electrolyte can be conveniently collected, which is beneficial to realize the reuse of the electrolyte and can reduce the waste of the electrolyte, reduce the cost, and at the same time, can prevent the battery from being corroded or short-circuited, and can improve the safety of the battery in operation.
[0018] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter in the description of the application. BRIEF DESCRIPTION OF DRAWINGS
[0019] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the description of the embodiments, taken in conjunction with the following drawings in which:
[0020] Figure 1 is a structural schematic diagram of a battery according to some embodiments of the present application;
[0021] Figure 2 is an exploded schematic view of a battery according to some embodiments of the present application;
[0022] Figure 3 is a structural schematic view of an end cap assembly according to some embodiments of the present application from one perspective;
[0023] Figure 4 is a structural schematic view of an end cap assembly according to some embodiments of the present application from another perspective;
[0024] Figure 5 is a structural schematic view of a lower plastic according to some embodiments of the present application from one perspective;
[0025] Figure 6 is a structural schematic view of a lower plastic according to some embodiments of the present application from another perspective;
[0026] Figure 7 is a structural schematic view of a lower plastic according to some embodiments of the present application from yet another perspective;
[0027] Figure 8 is a structural schematic view of a lower plastic according to some embodiments of the present application from yet another perspective; Figure 7 is a magnified view of structure A in FIG. 6.
[0028] Reference Signs:
[0029] battery 1000, end cap assembly 100, center line m,
[0030] end cap 10, liquid injection hole 11,
[0031] lower plastic 20, body 201, first support portion 21, second support portion 22, recess 23, flow guide surface 231, partition plate 232, groove segment 233. DETAILED DESCRIPTION
[0032] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like reference numerals are used throughout the figures to refer to same or like elements or elements having same or similar function. The embodiments described below are exemplary and are intended to be illustrative of the present application and are not to be construed as limiting thereof.
[0033] In the description of the present application, it is to be understood by those ordinary skilled in the art that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present 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 present application. In addition, the features defined as "first" and "second" can be explicitly or implicitly included one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.
[0034] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0035] The following refers to Figures 1-8 The lower plastic 20 according to the embodiment of the present application is described.
[0036] As Figures 1-8 shown, the lower plastic 20 according to the embodiment of the present application can be arranged on one side of the end cover 10 of the battery 1000 (such as the lower side as shown in Figure 3 ), so as to separate the end cover 10 and the battery cell in the battery 1000, so as to realize the insulation between the end cover 10 and the battery cell, ensure the normal work of the battery 1000, and the lower plastic 20 can be provided with an opening hole corresponding to the position of the liquid injection hole 11, so as to facilitate the injection of electrolyte into the battery 1000 through the liquid injection hole 11.
[0037] The lower plastic 20 includes a body 201, and the body 201 is arranged in the length direction (such as Figure 5Two first support portions 21 are formed by protruding from both ends of the body 201 along the first direction (as shown in the left-right direction). Each first support portion 21 has a groove 23 recessed from the body 201 along the first direction. The groove 23 has two first inner surfaces, which are arranged opposite to each other along the length of the lower plastic 20. Along the second direction, the first inner surface of each groove 23 extends obliquely away from the other first inner surface to form a guide surface 231. The second direction is opposite to the first direction, and both the first and second directions are parallel to the thickness direction of the lower plastic 20. Figures 5-8 As shown, the thickness direction is vertical, the first direction is downward, and the second direction is upward.
[0038] Combination Figure 6 As shown, the upper side of the groove 23 has an opening, and the groove 23 has two first inner surfaces, which are located along the length of the lower plastic 20 (e.g., ...). Figure 6 Arranged opposite each other in the left and right directions (as shown), along the second direction (such as... Figure 6 As shown in the bottom-up direction, the first inner side of each groove 23 extends obliquely toward another first inner side away from the groove 23 to form a guide surface 231 for electrolyte outflow, which is beneficial for guiding the electrolyte flow.
[0039] by Figure 6 , Figure 7 and Figure 8 For example, the left wall of the groove 23 located at the left end of the lower plastic 20 is a flow guide surface 231. The flow guide surface 231 extends obliquely from right to left in the direction near the end cap 10. The right wall of the groove 23 located at the right end of the lower plastic 20 is a flow guide surface 231. The flow guide surface 231 extends obliquely from left to right in the direction near the end cap 10. Of course, the right wall of the groove 23 located at the left end of the lower plastic 20 can be a flow guide surface 231. The flow guide surface 231 can extend obliquely from left to right in the direction near the end cap 10. The left wall of the groove 23 located at the right end of the lower plastic 20 can be a flow guide surface 231. The flow guide surface 231 can extend obliquely from right to left in the direction near the end cap 10.
[0040] There may be a gap between the lower plastic 20 and the end cap 10, and during the electrolyte injection process of the battery 1000, a portion of the electrolyte may remain in the gap. By defining a groove 23 with a flow guiding surface 231 in the support 21, the flow direction of the electrolyte can be guided, so that the residual electrolyte can flow into the groove 23 along the flow guiding surface 231, and the electrolyte in the groove 23 can flow out along the flow guiding surface 231, so as to facilitate the collection of the residual electrolyte.
[0041] Specifically, when the battery 1000 is used in an electrical device (e.g., a vehicle, an aircraft, or an energy storage cabinet), the flow guide surface 231 can guide the electrolyte in the groove 23 out of the battery 1000, facilitating the collection of the residual electrolyte, facilitating the reuse of the electrolyte, reducing the waste of the electrolyte, and reducing the cost.
[0042] It can be understood that, during the liquid injection process of the battery 1000, the battery 1000 is generally placed vertically, that is, the up-down direction shown in Figure 1 and Figure 2 may be the vertical direction in real life, the groove 23 can accommodate the electrolyte remaining between the lower plastic 20 and the end cover 10, and during the working process (e.g., charging or discharging) of the battery 1000, the battery 1000 is generally placed horizontally, that is, the up-down direction shown in Figure 1 and Figure 2 may be the horizontal direction in real life, and the electrolyte in the groove 23 can flow out along the flow guide surface 231.
[0043] According to the lower plastic 20 of the embodiment of the present application, by defining the groove 23 with the flow guide surface 231 in the support portion 21, the groove 23 can accommodate the electrolyte remaining between the lower plastic 20 and the end cover 10 during the liquid injection process of the battery 1000, and the electrolyte in the groove 23 can flow out along the flow guide surface 231, which can discharge the electrolyte remaining between the lower plastic 20 and the end cover 10, facilitate the collection of the residual electrolyte, facilitate the reuse of the electrolyte, reduce the waste of the electrolyte, and reduce the cost. Compared with the solution of providing a flow guide through hole in the groove bottom of the groove 23 to continuously guide the residual electrolyte into the inside of the battery 1000, the solution can prevent the corrosion or short circuit of the battery cell and the end cover 10 due to the metal wire or other metal foreign matter passing through the flow guide through hole, and can improve the structural strength of the support portion 21 and the safety of the working of the battery 1000.
[0044] As shown in Figure 6 , Figure 7 and Figure 8 , in some embodiments, the groove 23 can include an inner bottom surface, and in the length direction (e.g., the left-right direction shown in Figure 7 ) of the lower plastic 20, the size of the inner bottom surface is smaller than the size of the opening of the groove 23, which facilitates the increase of the inclination degree of the first inner side surface (e.g., the flow guide surface 231), so that the electrolyte remaining between the lower plastic 20 and the end cover 10 can more smoothly flow into the groove 23, and the electrolyte in the groove 23 can more smoothly flow out along the flow guide surface 231, facilitating the collection of the residual electrolyte and facilitating the reuse of the electrolyte.
[0045] In other embodiments, the groove 23 can be formed by directly connecting two first inner surfaces, and the cross-section of the groove 23 is triangular, that is, the groove 23 does not need to be provided with a bottom.
[0046] like Figure 7 and Figure 8 As shown, according to some embodiments of this application, the inclination angle of the guide surface 231 is α. Specifically, the groove 23 may have an arrangement direction along the lower plastic 20 and the end cap 10 (e.g., Figure 7 The centerline extending in the vertical direction (as shown) has an inclination angle α relative to the centerline of the groove 23. If the inclination angle of the guide surface 231 relative to the centerline of the lower plastic 20 is too small, the electrolyte in the groove 23 will have difficulty flowing out along the guide surface 231. Therefore, α can be greater than or equal to 0.1°. α can be any one of 0.1°, 1°, 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80° or any range between two values, so that the guide surface 231 can guide the flow direction of the electrolyte, that is, the electrolyte in the groove 23 can flow out along the guide surface 231, so as to facilitate the collection of residual electrolyte.
[0047] like Figure 6 As shown, according to some embodiments of this application, at least one partition plate 232 can be provided in the groove 23. The partition plate 232 can divide the groove 23 into multiple slots 233, which can improve the structural strength of the support 21. At the same time, the electrolyte in the groove 23 can be stored in multiple slots 233, which can reduce the impact force of residual electrolyte on the side wall of the groove 23, thereby improving the stability of the internal structure of the battery 1000 and improving the safety of the battery 1000 operation.
[0048] In some embodiments, the partition plate 232 and the inner bottom surface of the groove 23 can be arranged at intervals, that is, the side of the partition plate 232 facing the inner bottom surface of the groove 23 (e.g.) Figure 6 There can be a gap between the lower edge (shown) and the inner bottom surface of the groove 23, so that multiple groove segments 233 can be interconnected, that is, the electrolyte in multiple groove segments 233 can flow to each other. On the one hand, the level of the electrolyte in each groove segment 233 can be the same, ensuring that the electrolyte in the groove 23 can be discharged smoothly. On the other hand, it can reduce the impact force of the electrolyte on the side wall of the groove 23, which can improve the stability of the internal structure of the battery 1000 and improve the safety of the battery 1000 during operation.
[0049] In some embodiments, the partition plate 232 can abut against the inner bottom surface of the groove 23, that is, each groove segment 233 can be independent of each other to respectively accommodate the residual electrolyte, which can improve the structural strength of the groove 23, improve the service life of the lower plastic 20, facilitate maintenance, and be conducive to improving the stability of the internal structure of the battery 1000 and improving the safety of the battery 1000.
[0050] As shown in Figure 7 and Figure 8 , according to some embodiments of the present application, in the direction close to the end cover 10 (such as the downward direction shown in Figure 8 , the size of the cross section of the groove 23 perpendicular to the up-down direction (such as the up-down direction shown in Figure 8 ) gradually increases in the direction from bottom to top, which can increase the opening of the groove 23, be conducive to improving the guiding effect of the electrolyte, so that the residual electrolyte between the lower plastic 20 and the end cover 10 can flow into the groove 23 more smoothly, and the electrolyte in the groove 23 can flow out along the flow guide surface 231 more smoothly, facilitating the collection of the residual electrolyte.
[0051] As shown in Figure 3 , Figure 4 , Figure 5 and Figure 6 , according to some embodiments of the present application, the lower plastic 20 can also have at least one second support part 22, which can be located between the two first support parts 21, which can improve the support effect of the end cover 10 and improve the stability of the installation of the end cover 10; the first support part 21 can be provided with a groove 23, or the second support part 22 can be provided with a groove 23, or the first support part 21 and the second support part 22 can be respectively provided with a groove 23, to accommodate the residual electrolyte between the lower plastic 20 and the end cover 10, facilitating discharge.
[0052] According to some embodiments of the present application, the lower plastic 20 can be an integrally formed insulating part, for example, the lower plastic 20 can be made of rubber or silicone insulating material, which can realize the insulation between the end cover 10 and the battery cell, and ensure the normal work of the battery 1000, wherein the lower plastic 20 can be clamped with the end cover 10, facilitating installation, or the lower plastic 20 can be injection molded on the end cover 10, which is conducive to the close fit of the lower plastic 20 and the end cover 10, thereby reducing the residual electrolyte between the lower plastic 20 and the end cover 10 and reducing the waste of electrolyte.
[0053] According to the end cover assembly 100 of the embodiments of the present application, the end cover 10 and the lower plastic 20 can be provided on one side of the end cover 10 (such as the side close to the end cover 10 shown in Figure 3The lower side of the end cover 10 is provided with a first support part 21, which is protruded away from the end cover 10, and a second support part 22, which is protruded away from the end cover 10 and is arranged on the left side of the end cover 10 (as shown in the lower side of the end cover 10), so as to separate the end cover 10 and the battery cell in the battery 1000, and to realize the insulation between the end cover 10 and the battery cell.
[0054] According to the end cover assembly 100 of the embodiment of the present application, by adopting the lower plastic 20, the residual electrolyte in the end cover assembly 100 can be discharged, and the residual electrolyte can be collected conveniently, which is beneficial to realize the recycling of the electrolyte and can reduce the waste of the electrolyte.
[0055] According to the battery 1000 of the embodiment of the present application, the end cover assembly 100 is adopted, the residual electrolyte in the end cover assembly 100 can be discharged, and the residual electrolyte can be collected conveniently, which is beneficial to realize the recycling of the electrolyte and can reduce the waste of the electrolyte, and can reduce the cost, and can prevent the corrosion or short circuit of the battery 1000, and can improve the safety of the battery 1000.
[0056] Other configurations and operations of the battery 1000 according to the embodiment of the present application are known to those skilled in the art, and will not be described in detail herein. In the description of the present application, the "first feature" and the "second feature" can include one or more features. Among them, the up-down direction, the left-right direction and the front-rear direction are based on the up-down direction, the left-right direction and the front-rear direction shown in the figure.
[0057] In the description of the present application, unless otherwise explicitly specified and limited, the "first feature" is "above" or "below" the "second feature", which can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "above", "upper" and "upper surface" of the first feature relative to the second feature include that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher than the second feature in horizontal height.
[0058] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0059] While the embodiments of the application have been shown and described, it is to be understood that the embodiments can be varied, modified, substituted and changed by those skilled in the art without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims
1. A lower plastic (20), characterized in that, the lower plastic (20) comprises a body (201), two ends of the body (201) in a length direction respectively protrude in a first direction, forming two first support portions (21); wherein the first support portion (21) has a groove (23) recessed from the body in the first direction, the groove (23) has two first inner sides, the two first inner sides are oppositely arranged in the length direction of the lower plastic (20); in a second direction, the first inner side of each groove (23) extends obliquely to form a guide surface (231) away from the other first inner side of the groove (23), the second direction is opposite to the first direction and parallel to the thickness direction of the lower plastic (20).
2. The lower plastic (20) of claim 1, wherein, The groove (23) also has an inner bottom surface, in the length direction of the lower plastic, the size of the inner bottom surface is smaller than the size of the opening of the groove (23).
3. The lower plastic (20) of claim 1, wherein, The inclination angle of the guide surface (231) is α, α≥0.1°.
4. The lower plastic (20) of claim 1, wherein, The groove (23) is provided with at least one partition plate (232), the partition plate (232) separates the groove (23) into a plurality of groove segments (233).
5. The lower plastic (20) of claim 4, wherein, The partition plate (232) is arranged in a spaced manner with the inner bottom surface of the groove (23), and the plurality of groove segments (233) are in communication with each other.
6. The lower plastic (20) of claim 4, wherein, The partition plate (232) abuts against the bottom wall of the groove (23).
7. The lower plastic (20) of claim 1, wherein, The lower plastic (20) further has at least one second support portion (22), the second support portion (22) is located between the two first support portions (21), and the second support portion (22) is provided with the groove (23).
8. The lower plastic (20) according to any one of claims 1-7, wherein, The lower plastic (20) is an integral insulation part.
9. An end cap assembly (100) characterized by, The end cover assembly (100) comprises an end cover (10) and the lower plastic (20) according to any one of claims 1-8, the lower plastic (20) is arranged on one side of the end cover (10), the end cover (10) has a liquid injection hole (11), and the first support portion (21) protrudes away from the end cover (10).
10. A battery (1000) characterized by, The end cover assembly (100) according to claim 9.