Battery cover plate and battery
By introducing an insulating isolation design of the lower plastic and folded parts into the battery cover, the lifting problem caused by excessive number of pole ear layers is solved, the risk of short circuit is avoided, and the safety and reliability of the battery cover is improved.
Patent Information
- Application Number
- CN202420465962.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-11
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-03-11
AI Technical Summary
When there are too many pole ear layers, the existing battery cover plates can easily lead to curling, affecting the welding quality and causing short circuit risk.
A battery cover is designed, including a cover body, a lower plastic and a folding piece. The lower plastic is connected to the cover body to insulate the core and the cover body; the folding part is foldable and is used to insulate the pole ear and the shell, and by adjusting the length of the folding part, it can be effectively blocked from the curled outer pole ear.
It effectively avoids the risk of short circuit or leakage between the core and the cover body, the electrode ear and the core, improves the safety and reliability of the battery cover, and prevents the raised outer electrode ears to ensure welding quality.
Smart Images
Figure CN222637443U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, and in particular to a battery cover and a battery. Background Art
[0002] In the industry, the tabs and top covers are mostly folded in a Z-shaped manner. However, when the number of tab layers exceeds a certain number and the space redundancy limit, the outermost tab is prone to warping, affecting the welding quality and even causing short circuit risks. Utility Model Content
[0003] The purpose of the utility model is to provide a battery cover and a battery, which can avoid short circuit or leakage caused by overlapping of the winding core and the cover body, and at the same time avoid short circuit or leakage caused by overlapping of the pole ear and the winding core, and also block the raised outer pole ear, thereby improving the safety and reliability of the battery cover.
[0004] The embodiment of the utility model is achieved as follows:
[0005] In a first aspect, the utility model provides a battery cover, comprising a cover body, a lower plastic, and a folding piece;
[0006] The lower plastic is connected to the cover body, and the lower plastic is used to insulate and isolate the winding core and the cover body. The folding piece and the lower plastic can be folded and connected, and the folding piece is used to insulate and isolate the pole ear and the shell;
[0007] The length of the folding member extending along the first direction is greater than or equal to half of the length of the tab extending along the second direction, and the first direction is perpendicular to the second direction.
[0008] In an optional embodiment, the number of the folding pieces is two, and the two folding pieces are arranged on both sides of the lower plastic along the first direction.
[0009] In an optional embodiment, the cover body is provided with a pole, and two folding members are arranged at intervals on both sides of the pole along the first direction.
[0010] In an optional embodiment, the folding piece includes a connecting portion and a folding portion, one end of the connecting portion is foldably connected to the lower plastic, and the other end is connected to the folding portion, and the lower plastic, the connecting portion and the folding portion together form a slot structure.
[0011] In an optional embodiment, the cross-sectional shape of the notch structure is configured as a rectangle or a trapezoid.
[0012] In an optional embodiment, the depth of the notch structure extends along the second direction, and the opening direction is toward the cover body.
[0013] In an optional embodiment, the battery cover further includes a support member made of insulating material, the support member is connected to a side of the lower plastic away from the cover body, and the length of the folding member extending along the first direction is less than or equal to the length of the support member extending along the second direction.
[0014] In an optional embodiment, the folding piece, the lower plastic and the supporting piece are integrally formed.
[0015] In an optional embodiment, the length of the folding piece extending along the third direction is greater than or equal to 1.1 times the length of the tab extending along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.
[0016] In a second aspect, the utility model provides a battery, comprising a battery housing, a winding core and a battery cover as in any one of the aforementioned embodiments, wherein the winding core is provided with pole ears and the winding core is located in the battery housing, and the battery cover is covered on the open end of the battery housing.
[0017] The beneficial effects of the embodiments of the utility model include:
[0018] The utility model provides a battery cover and a battery, which include a cover body, a lower plastic and a folding piece. On the one hand, the lower plastic insulates and isolates the cover body from the winding core to avoid short circuit or leakage caused by overlapping of the winding core and the cover body; on the other hand, the folding piece connected to the lower plastic can be folded to a shielding position to insulate and isolate the pole ear from the shell to avoid short circuit or leakage caused by overlapping of the pole ear and the winding core. Combining the above two situations, the risk of short circuit or leakage is blocked, and the safety and reliability of the battery cover are improved. In addition, considering that the length of the folding piece extending along the first direction is too small, it cannot block the raised outer pole ear when folded to the shielding position. Therefore, the length of the folding piece extending along the first direction is set to be greater than or equal to half of the length of the pole ear extending along the second direction. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0020] Figure 1 A schematic diagram of a battery cover provided by an embodiment of the utility model;
[0021] Figure 2 A schematic cross-sectional view of a battery cover provided by an embodiment of the utility model;
[0022] Figure 3A schematic diagram of the assembly of a battery cover and a winding core provided in an embodiment of the utility model;
[0023] Figure 4 The embodiment of the utility model provides Figure 3 A partial enlarged schematic diagram in the middle;
[0024] Figure 5 The embodiment of the utility model provides Figure 2 A partial enlarged schematic diagram of point B in the middle;
[0025] Figure 6 A schematic cross-sectional view of another battery cover provided by an embodiment of the utility model;
[0026] Figure 7 The embodiment of the utility model provides Figure 6 A partial enlarged schematic diagram of point C in the middle.
[0027] Icons: 10 - battery cover; 30 - winding core; 31 - pole ear; 100 - cover body; 110 - pole column; 310 - lower plastic; 330 - folding piece; 331 - connecting part; 333 - folding part; 335 - slot structure; 350 - supporting part; 510 - first direction; 530 - second direction; 550 - third direction. DETAILED DESCRIPTION
[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0031] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0032] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0034] Figure 1 This is a schematic diagram of a battery cover 10 provided in an embodiment of the utility model. Figure 2 For a cross-sectional schematic diagram of a battery cover 10 provided in an embodiment of the utility model, please refer to Figure 1 and Figure 2 The utility model provides a battery cover 10 , which includes a cover body 100 , a lower plastic 310 and a folding piece 330 .
[0035] The lower plastic 310 is connected to the cover 100, and the lower plastic 310 is used to insulate and isolate the winding core 30 and the cover 100. The folding piece 330 is foldably connected to the lower plastic 310, and the folding piece 330 is used to insulate and isolate the tab 31 from the housing. The length of the folding piece 330 extending along the first direction 510 is greater than or equal to half of the length of the tab 31 extending along the second direction 530, and the first direction 510 and the second direction 530 are perpendicular to each other.
[0036] It can be understood that, in this embodiment, Figure 1 and Figure 2As shown, the folding member 330 before folding is arranged parallel to the lower plastic 310, and the size of the flip member defined in this application is actually the extension size in all directions before folding. Figure 1 Taking the current viewing angle as an example, the first direction 510 refers to the width direction of the battery cover 10 , and the second direction 530 refers to the thickness direction of the battery cover 10 .
[0037] Based on the above configuration, on the one hand, the lower plastic 310 insulates and isolates the cover 100 from the winding core 30, avoiding short circuit or leakage caused by the overlapping of the winding core 30 and the cover 100; on the other hand, the folding member 330 foldably connected to the lower plastic 310 can be folded to a shielding position, insulating and isolating the tab 31 from the shell, avoiding short circuit or leakage caused by the overlapping of the tab 31 and the winding core 30. In both cases, the risk of short circuit or leakage is blocked, and the safety and reliability of the battery cover 10 are improved.
[0038] In addition, if Figure 3 and Figure 4 As shown, Figure 4 The embodiment of the utility model provides Figure 3 A is a partial enlarged schematic diagram. It should be emphasized that when the battery cover 10 is applied to actual production (i.e., when the cover is assembled with the winding core 30), the lower plastic 310, the folding member 330 and the winding core 30 together surround and form a receiving space for the tabs 31 connected to the winding core 30, and the multi-layer tabs 31 are in a gathered state. Therefore, the length of the tabs 31 extending in any direction described in this embodiment is specifically the length of the gathered multi-layer tabs 31 extending in any direction.
[0039] Considering that the width of the folding member 330 (i.e., the length extending along the first direction 510) is too small, it cannot block the raised outer layer tab 31 when folded to the shielding position. Therefore, the length of the folding member 330 extending along the first direction 510 is set to be greater than or equal to half of the length of the tab 31 extending along the second direction 530 to avoid the above situation. It can be understood that Figure 3 The folding member 330 is a schematic diagram showing the folded member 330 in the shielding position.
[0040] In some embodiments, Figure 1 As shown, in order to enhance the practicality of the battery cover 10, the number of the folding pieces 330 is two, and the two folding pieces 330 are arranged on both sides of the lower plastic 310 along the first direction 510. Through the above arrangement, the storage effect of the battery cover 10 on the tab 31 is enhanced, and the safety of the battery cover 10 is improved. Preferably, the two folding pieces 330 are symmetrically arranged on both sides of the lower plastic 310 along the first direction 510.
[0041] Furthermore, the cover 100 is provided with a pole 110, and two folding pieces 330 are arranged at intervals on both sides of the pole 110 along the first direction 510. It should be noted that the pole 110 is generally used for welding with the pole lug 31. Based on this, the position of the folding piece 330 is accurately defined by the pole 110, which can save the material of the folding piece 330 on the basis of ensuring the insulation performance of the battery cover 10, and avoid unnecessary cost waste.
[0042] See also Figure 2 , Figure 5 , Figure 6 as well as Figure 7 ,in, Figure 5 The embodiment of the utility model provides Figure 2 The enlarged schematic diagram of the part B in the middle. Figure 7 The embodiment of the utility model provides Figure 6 The folding member 330 includes a connecting portion 331 and a folding portion 333 , one end of the connecting portion 331 is foldably connected to the lower plastic 310 , and the other end is connected to the folding portion 333 , and the lower plastic 310 , the connecting portion 331 and the folding portion 333 are surrounded together to form a notch structure 335 .
[0043] It can be understood that based on the setting of the above-mentioned groove, on the one hand, the difficulty of folding the folding piece 330 can be reduced, and the operating feel and operating speed can be improved; on the other hand, the accuracy of folding the folding piece 330 to the shielding position can be guaranteed, which is beneficial to improving the reliability of the battery cover 10 provided in this application.
[0044] like Figure 5 and Figure 6 As shown, the cross-sectional shape of the notch structure 335 is configured as a rectangle or a trapezoid. It should be noted that the solutions equivalent to this embodiment that can achieve the effect of the embodiment are all within the scope of the disclosure of the utility model. For example, the cross-sectional shape can also be set to a circular arc or a V shape. In addition, since the folding member 330 is folded downward in this embodiment to reach the shielding position and achieve the shielding effect, in order to further simplify the folding operation, the depth of the notch structure 335 extends along the second direction 530, and the opening direction is toward the cover body 100.
[0045] As an optional embodiment, Figure 1 As shown, in order to further enhance the insulation effect of the battery housing, the length of the folding member 330 extending along the third direction 550 is greater than or equal to 1.1 times the length of the tab 31 extending along the third direction 550, and the first direction 510, the second direction 530 and the third direction 550 are perpendicular to each other. Figure 1The schematic diagram is for reference, and the third direction 550 specifically refers to the length direction of the battery cover 10. Based on the above size restrictions, the folding member 330 is too short to insulate the tab 31 in the third direction 550, which may cause lithium deposition or even short circuit in the battery.
[0046] Furthermore, if Figure 1 , Figure 3 as well as Figure 4 As shown, the battery cover 10 further includes a support member 350 made of an insulating material, the support member 350 is connected to the side of the lower plastic 310 away from the cover 100, and the length of the folding member 330 extending along the first direction 510 is less than or equal to the length of the support member 350 extending along the second direction 530. Based on this, the folding member 330 is prevented from crushing the winding core 30 during actual use of the battery housing, resulting in lithium deposition or even short circuit of the battery.
[0047] Considering that the folding piece 330, the lower plastic 310 and the supporting piece 350 all have insulating properties, the folding piece 330, the lower plastic 310 and the supporting piece 350 are optionally formed in one piece. Specifically, the three are formed in one piece by injection molding, and the material can be polypropylene (PP) or other high temperature resistant insulating materials, such as polytetrafluoroethylene (PTFE), polyethylene terephthalate (PET) or polyethylene (PE), etc. The above insulating materials are not easily melted at high temperatures, so that the insulating effect can be more effectively guaranteed.
[0048] In summary, the utility model provides a battery cover 10, which includes a cover body 100, a lower plastic 310 and a folding piece 330. On the one hand, the lower plastic 310 insulates and isolates the cover body 100 from the winding core 30 to avoid short circuit or leakage caused by the overlapping of the winding core 30 and the cover body 100; on the other hand, the folding piece 330 that can be folded and connected to the lower plastic 310 can be folded to a shielding position to insulate and isolate the pole ear 31 from the shell to avoid short circuit or leakage caused by the overlapping of the pole ear 31 and the winding core 30. Combined with the above two situations, the risk of short circuit or leakage is blocked, and the safety and reliability of the battery cover 10 are improved. In addition, considering that the length of the folding piece 330 extending along the first direction 510 is too small, it cannot block the raised outer layer pole ear 31 when folded to the shielding position. Therefore, the length of the folding piece 330 extending along the first direction 510 is set to be greater than or equal to half of the length of the pole ear 31 extending along the second direction 530.
[0049] In addition, the utility model also provides a battery, including a battery housing, a winding core 30 and a battery cover 10 as in the above-mentioned embodiment, wherein the winding core 30 is provided with a pole ear 31, and the winding core 30 is located in the battery housing, and the battery cover 10 is covered on the open end of the battery housing. Since the battery includes the above-mentioned battery cover 10, it can avoid short circuit or leakage caused by overlapping of the winding core 30 and the cover 100, and at the same time avoid short circuit or leakage caused by overlapping of the pole ear 31 and the winding core 30, and also block the raised outer pole ear 31, thereby improving the safety and reliability of the battery cover 10.
[0050] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A battery cover, characterized in that: It includes a cover body (100), a lower plastic (310) and a folding piece (330); The lower plastic (310) is connected to the cover (100), and the lower plastic (310) is used to insulate and isolate the winding core (30) and the cover (100); the folding piece (330) is foldably connected to the lower plastic (310), and the folding piece (330) is used to insulate and isolate the pole ear (31) and the shell; The length of the folding member (330) extending along the first direction (510) is greater than or equal to half of the length of the pole ear (31) extending along the second direction (530), and the first direction (510) and the second direction (530) are perpendicular to each other.
2. The battery cover according to claim 1, characterized in that: The number of the folding parts (330) is two, and the two folding parts (330) are arranged on both sides of the lower plastic (310) along the first direction (510).
3. The battery cover according to claim 2, characterized in that: The cover body (100) is provided with a pole (110), and the two folding parts (330) are arranged at intervals on both sides of the pole (110) along the first direction (510).
4. The battery cover according to claim 1, characterized in that: The folding piece (330) includes a connecting portion (331) and a folding portion (333); one end of the connecting portion (331) is foldably connected to the lower plastic (310), and the other end is connected to the folding portion (333); and the lower plastic (310), the connecting portion (331) and the folding portion (333) are together surrounded to form a notch structure (335).
5. The battery cover according to claim 4, characterized in that: The cross-sectional shape of the notch structure (335) is rectangular or trapezoidal.
6. The battery cover according to claim 4, characterized in that: The depth of the notch structure (335) extends along the second direction (530), and the opening direction is toward the cover body (100).
7. The battery cover according to any one of claims 1 to 6, characterized in that: The battery cover (10) further comprises a support member (350) made of an insulating material, wherein the support member (350) is connected to a side of the lower plastic (310) away from the cover body (100), and the length of the folding member (330) extending along the first direction (510) is less than or equal to the length of the support member (350) extending along the second direction (530).
8. The battery cover according to claim 7, characterized in that: The folding piece (330), the lower plastic (310) and the supporting piece (350) are integrally formed.
9. The battery cover according to any one of claims 1 to 6, characterized in that: The length of the folding member (330) extending along the third direction (550) is greater than or equal to 1.1 times the length of the pole ear (31) extending along the third direction (550), and the first direction (510), the second direction (530) and the third direction (550) are perpendicular to each other.
10. A battery, characterized in that: It comprises a battery casing, a winding core (30) and a battery cover plate (10) as claimed in any one of claims 1 to 9, wherein the winding core (30) is provided with a pole ear (31), and the winding core (30) is located in the battery casing, and the battery cover plate (10) is covered on the open end of the battery casing.