Lower plastic part and battery

Abstract

The utility model relates to battery manufacturing technical field, concretely disclose a kind of lower plastic parts and battery, comprising: plastic part main body;Bendable side wing, the bendable side wing is flexibly connected in the plastic part main body end;Wherein, the bendable side wing is equipped with openwork window;The edge border of one side of the openwork window close to the root of the tab, is equipped with the elastic edge for the plastic part main body clamping the tab of cooperation.The lower plastic parts and battery provided by the utility model can effectively solve the problem that existing lower plastic parts are prone to excessive pulling of the tab, causing the tab root to crack.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and in particular to a lower plastic part and a battery. Background Technology

[0002] Generally, the end face of a battery cell has outwardly protruding tabs. When assembling the battery cell and other components into a battery, one step is to use a lower plastic part to clamp and fix the tabs from above and below, thus limiting their position.

[0003] The existing lower plastic component is too rigid, and after clamping the tab, there is virtually no relative movement between the tab and the lower plastic component. In actual use, it has been found that when the battery vibrates (e.g., due to the bumps of a new energy vehicle), there are often slight differences in the amplitude and frequency of vibration between the cell and the lower plastic component. This vibration difference causes the lower plastic component to exert a large tensile force on the tab, leading to cracks at the base of the tab.

[0004] Therefore, it is necessary to improve the existing lower plastic parts to solve the problem that they are prone to pulling on the tabs, causing cracks at the base of the tabs.

[0005] The information disclosed in this background section is included only to enhance the understanding of the context of this disclosure, and therefore may contain information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0006] One objective of this invention is to provide a lower plastic component and a battery that can effectively solve the problem that existing lower plastic components are prone to excessive stretching of the tabs, leading to cracking at the base of the tabs.

[0007] To achieve the above objectives, on the one hand, this utility model provides a lower plastic part for clamping the electrode tabs of the battery cell, comprising:

[0008] Plastic body;

[0009] A bendable side wing, which is flexibly connected to the end of the plastic part body;

[0010] in,

[0011] The bendable side wing is provided with a hollowed-out window;

[0012] The hollowed-out window has an elastic pressing edge near the root of the electrode tab on one side, which is used to clamp the electrode tab with the plastic body.

[0013] Optionally, the end of the elastic pressing edge is provided with an arc-shaped connecting part facing the arch of the hollowed-out window.

[0014] Optionally, at least two of the arc-shaped connecting portions are spaced apart along the extension direction of the elastic pressing edge, wherein the radius of the arc-shaped connecting portion is 4mm-6mm.

[0015] Optionally, one end of the bendable side wing is connected to the main body of the plastic part via a flexible connecting strip, and the other end of the bendable side wing is snapped into the main body of the plastic part.

[0016] Optionally, the bendable side wing is provided with a buckle portion, and the plastic body is provided with a groove for engaging with the buckle portion at a position corresponding to the buckle portion.

[0017] Optionally, the bendable side wing is provided with two hollowed-out windows, and each hollowed-out window is provided with an elastic pressing edge, the width of which is 1mm-3mm.

[0018] The buckle is located between the two hollowed-out windows.

[0019] Optionally, the plastic body is provided with a junction groove for electrically connecting the tab to the electrode post;

[0020] The electrical contact slot is located on the side of the card slot near the flexible side wing.

[0021] Optionally, the main body of the plastic part, the flexible connecting strip, and the bendable side wings are integrally injection molded structures.

[0022] On the other hand, a battery is provided, including a cell with outwardly protruding tabs and a lower plastic part for clamping the tabs.

[0023] Optionally, the distance between the first edge of the hollow window opposite to the elastic pressing edge and the electrode tab is 8mm-10mm; the distance between the second edge of the hollow window adjacent to the elastic pressing edge and the electrode tab is 4mm-6mm.

[0024] The beneficial effects of this utility model are as follows: It provides a lower plastic part and a battery. During installation, first rotate to open the bendable side wing, then place the electrode tab on the main body of the plastic part, and then rotate to close the bendable side wing. At this time, the elastic pressing edge of the bendable side wing cooperates with the main body of the plastic part to moderately clamp and fix the electrode tab from the top and bottom, thereby achieving the clamping and positioning of the electrode tab.

[0025] When the battery vibrates during use, slight relative movement may occur between the cell and the lower plastic component. At this time, the flexible side wing, connected to the end of the plastic component body via a flexible connection, possesses a certain degree of flexibility and mobility. The perforated window further increases the local elasticity of the elastic pressing edge. Therefore, when the tensile force generated by vibration is transmitted to the clamping area, the elastic pressing edge provides buffering and elastic displacement, thereby adaptively bending or deforming relative to the root of the tab, effectively absorbing and offsetting some of the stress acting on the root of the tab, and preventing excessive tensile force applied to the tab, which could lead to cracking at the root of the tab.

[0026] Therefore, the lower plastic part and battery provided by this utility model can effectively solve the problem that the existing lower plastic part is prone to excessive stretching of the tab, resulting in cracking at the base of the tab. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A schematic diagram of the battery structure provided for an embodiment;

[0029] Figure 2 The lower plastic part provided in the embodiment.

[0030] In the picture:

[0031] 100. Lower plastic part; 200. Battery cell; 200a. Electrode tab;

[0032] 1. Plastic body; 101. Slot; 102. Electrical connector slot;

[0033] 2. Bendable side wings; 201. Hollowed-out window; 202. Elastic pressing edge; 2021. Arc-shaped connecting part; 203. Buckle part;

[0034] 3. Flexible connecting strip. Detailed Implementation

[0035] In this utility model, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this utility model. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this utility model, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0036] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit the invention.

[0037] In the description of this utility model, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " generally indicates that the preceding and following objects have an "or" logical relationship.

[0038] In this invention, terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy, or order between these entities or operations.

[0039] Without further limitations, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this invention is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a series of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0040] Similar to the understanding in the Examination Guidelines, in this utility model, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments of this utility model, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0041] In the description of the embodiments of this utility model, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the convenience of describing the specific embodiments of this utility model or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0042] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this utility model, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this utility model pertains, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0043] This embodiment provides a lower plastic component and a battery, which can effectively solve the problem that existing lower plastic components are prone to excessive stretching of the tabs, leading to cracking at the base of the tabs.

[0044] See Figure 1 The battery provided in this embodiment includes a cell 200 with an outwardly protruding tab 200a and a lower plastic part for clamping the tab 200a.

[0045] Specifically, see Figure 2 The lower plastic part 100 for holding the electrode tab 200a includes a plastic part body 1 and a flexible side wing 2 flexibly connected to the end of the plastic part body 1.

[0046] in,

[0047] The bendable side wing 2 is provided with a hollowed-out window 201;

[0048] The hollow window 201 has an elastic pressing edge 202 on one side edge near the root of the tab 200a for cooperating with the plastic body 1 to clamp the tab 200a.

[0049] When installing the lower plastic part 100 and battery provided by this utility model, first rotate to open the bendable side wing 2, then place the electrode tab 200a on the main body 1 of the plastic part, and then rotate to close the bendable side wing 2. At this time, the elastic pressing edge 202 of the bendable side wing 2 cooperates with the main body 1 of the plastic part to moderately clamp and fix the electrode tab 200a from the top and bottom, thereby achieving the clamping and positioning of the electrode tab 200a. During the production process, the hollow window 201 can facilitate the inspection of whether the electrode tab 200a is placed in place, improving inspection efficiency; at the same time, the hollow window 201 can reduce the amount of material used in the lower plastic part 100, reduce the weight of the battery cell 200, and reduce costs.

[0050] When the battery vibrates during use, a slight relative movement may occur between the cell 200 and the lower plastic part. At this time, the flexible side wing 2, connected to the end of the plastic part body 1 via a flexible connection, possesses a certain degree of flexibility and mobility. The hollowed-out window 201 further increases the local elasticity of the elastic pressing edge 202. Therefore, when the tensile force generated by vibration is transmitted to the clamping part, the elastic pressing edge 202 can provide buffering and elastic displacement, thereby adaptively bending or deforming relative to the root of the tab 200a. This effectively absorbs and counteracts some of the stress acting on the root of the tab 200a, preventing excessive tensile force from being applied to the tab 200a and causing cracking at the root of the tab 200a.

[0051] Therefore, the lower plastic part 100 and battery provided by this utility model can effectively solve the problem that the existing lower plastic part is prone to excessive stretching of the tab 200a, resulting in cracking at the root of the tab 200a.

[0052] In this embodiment, the end of the elastic pressing edge 202 is provided with an arc-shaped connecting portion 2021 that protrudes towards the hollow window 201. When the bendable side wing 2 is closed to clamp the tab 200a, the arc-shaped connecting portion 2021 serves as an end transition structure of the elastic pressing edge 202. During vibration, the arc-shaped connecting portion 2021 can guide the elastic pressing edge 202 to bend and deform smoothly, achieving buffering and thus adapting to the small displacement of the tab 200a. The arc-shaped connecting portion 2021 reduces stress concentration at the end of the elastic pressing edge 202, improves the flexibility and fatigue life of the elastic pressing edge 202, and enables it to more effectively buffer tensile forces during vibration, further reducing the risk of cracking at the root of the tab 200a. Specifically, the side of the arc-shaped connecting portion 2021 facing away from the hollow window 201 forms a recess to correspond to the tab 200a, avoiding compression of the root of the tab 200a during clamping and causing the tab 200a to crack.

[0053] Optionally, at least two of the arc-shaped connecting portions 2021 are spaced apart along the extension direction of the elastic pressure edge 202. Specifically, at least two arc-shaped connecting portions 2021 are provided in the extension direction of the elastic pressure edge 202, and the distance between the two arc-shaped connecting portions 2021 is less than the width of the tab 200a. Two arc-shaped connecting portions 2021 are positioned on both sides of the tab 200a in the width direction to avoid direct contact between the tab 200a and the elastic pressure edge 202, thus reducing wear caused by contact when the tab 200a is displaced during production or vibration. Simultaneously, the radius of the arc-shaped connecting portion 2021 is 4mm-6mm. This size range ensures that the arc-shaped connecting portion 2021 has an appropriate curvature. When the elastic pressure edge 202 bends due to vibration, it ensures sufficient flexibility to absorb vibration energy while avoiding elastic failure due to excessive or insufficient curvature, thereby enhancing the durability and reliability of the structure.

[0054] In this embodiment, one end of the bendable side wing 2 is connected to the plastic body 1 via a flexible connecting strap 3, and the other end of the bendable side wing 2 is snapped onto the plastic body 1. During installation, the operator rotates the bendable side wing 2 via the flexible connecting strap 3 to open or close it. After closing, the bendable side wing 2 is fixed to the plastic body 1 by snapping. The flexible connecting strap 3 provides a hinge function for the bendable side wing 2, allowing the side wing to move flexibly, while the snap-fit ​​structure ensures the stability of the clamping. This design simplifies the installation process and allows the bendable side wing 2 to undergo adaptive micro-movements during vibration, reducing rigid tension on the tab 200a.

[0055] Furthermore, the bendable side wing 2 is provided with a latching part 203, and the plastic body 1 is provided with a slot 101 corresponding to the position of the latching part 203 for engaging with the latching part 203. When the bendable side wing 2 is closed, the latching part 203 and the slot 101 engage with each other to form a lock, preventing the bendable side wing 2 from accidentally coming loose during vibration, ensuring the durability of the clamping, and at the same time, the locking structure is simple and easy to operate, improving assembly efficiency.

[0056] Optionally, the bendable side wing 2 is provided with two hollowed-out windows 201, and each hollowed-out window 201 is provided with a corresponding elastic pressing edge 202. The width of the elastic pressing edge 202 is 1mm-3mm; the latching part 203 is located between the two hollowed-out windows 201. The design of the latching part 203 being located in the middle realizes the locking of the two elastic pressing edges 202, improving the structural compactness.

[0057] In this embodiment, the plastic body 1 is provided with a junction groove 102 for electrically connecting the tab 200a to the electrode post; the junction groove 102 is located on the side of the slot 101 near the bendable side wing 2. The tab 200a is electrically connected to the electrode post through the junction groove 102, and the position of the junction groove 102 avoids the snap-fit ​​area. The junction groove 102 provides a dedicated channel for the tab 200a, facilitating welding or connection operations and improving the convenience and safety of electrical connection; its position design avoids interference with the slot 101, ensuring that the clamping function and electrical function do not affect each other.

[0058] Optionally, the plastic body 1, the flexible connecting strip 3, and the bendable side wings 2 are integrally injection molded structures. Integral injection molding eliminates connection gaps, improves structural integrity and strength, reduces the number of parts and assembly steps, lowers production costs, and avoids potential failure points at the connection between the flexible connecting strip 3 and the body.

[0059] In this embodiment, the distance between the first edge of the hollow window 201 opposite to the elastic pressing edge 202 and the tab 200a is 8mm-10mm; the distance between the second edge of the hollow window 201 adjacent to the elastic pressing edge 202 and the tab 200a is 4mm-6mm.

[0060] These dimensions control the gap between the elastic clamping edge 202 and the tab 200a, ensuring that the elastic clamping edge 202 has sufficient deformation space during vibration. The optimized distance dimensions prevent the elastic clamping edge 202 from over-constraining the tab 200a during the buffering process, while avoiding collisions with the tab 200a, ensuring the buffering effect and safety of the clamping, and further reducing the risk of cracking.

[0061] In summary, the lower plastic part 100 and battery provided in this embodiment have the following advantages:

[0062] ① By setting a bendable side wing 2 with an elastic pressure edge 202, flexible clamping and buffering of the tab 200a are achieved, effectively absorbing vibration stress.

[0063] ② By setting an arc-shaped connecting part 2021 at the end of the elastic pressure edge 202, stress concentration is reduced and the reliability and durability of the buffering effect are improved.

[0064] ③ By flexibly connecting one end of the bendable side wing 2 and snapping it with the other end, both installation convenience and clamping stability are ensured, while allowing adaptive micro-movements during vibration.

[0065] ④ By optimizing the key distance dimensions between the hollow window 201 and the tab 200a, precise and sufficient space is provided for the buffer deformation of the elastic pressing edge 202.

[0066] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A lower plastic component for clamping the tab (200a) of a battery cell, characterized in that, include: Plastic body (1); A bendable side wing (2) is flexibly connected to the end of the plastic body (1); in, The bendable side wing (2) is provided with a hollowed-out window (201); The hollow window (201) has an elastic pressing edge (202) on one side edge near the root of the tab (200a) for cooperating with the plastic body (1) to clamp the tab (200a).

2. The lower plastic part according to claim 1, characterized in that, The end of the elastic pressing edge (202) is provided with an arc-shaped connecting part (2021) facing the arch of the hollow window (201).

3. The lower plastic part according to claim 2, characterized in that, At least two of the arc-shaped connecting portions (2021) are spaced apart along the extending direction of the elastic pressing edge (202), wherein the radius of the arc-shaped connecting portion (2021) is 4mm-6mm.

4. The lower plastic part according to claim 1, characterized in that, One end of the bendable side wing (2) is connected to the plastic body (1) via a flexible connecting strip (3), and the other end of the bendable side wing (2) is snapped into the plastic body (1).

5. The lower plastic part according to claim 4, characterized in that, The bendable side wing (2) is provided with a buckle (203), and the plastic body (1) is provided with a slot (101) for engaging with the buckle (203) at the position corresponding to the buckle (203).

6. The lower plastic part according to claim 5, characterized in that, The bendable side wing (2) is provided with two hollow windows (201), and each hollow window (201) is provided with an elastic pressing edge (202), the width of which is 1mm-3mm; The buckle (203) is located between the two hollow windows (201).

7. The lower plastic part according to claim 5, characterized in that, The plastic body (1) is provided with a junction groove (102) for electrically connecting the tab (200a) to the pole post. The electrical connection slot (102) is located on the side of the slot (101) near the bendable wing (2).

8. The lower plastic part according to claim 4, characterized in that, The main plastic part (1), the flexible connecting strip (3), and the bendable side wing (2) are integrally injection molded structures.

9. A battery, characterized in that, The battery cell (200) includes an outwardly protruding tab (200a) and a lower plastic part for clamping the tab (200a) as described in any one of claims 1-8.

10. The battery according to claim 9, characterized in that, The distance between the first edge of the hollow window (201) opposite to the elastic pressing edge (202) and the electrode (200a) is 8mm-10mm; the distance between the second edge of the hollow window (201) adjacent to the elastic pressing edge (202) and the electrode (200a) is 4mm-6mm.

Images