Leakage-proof power battery cover plate structure

Abstract

The utility model discloses an anti-leakage power battery cover plate structure, which relates to the technical field of power batteries, and comprises a support frame, the upper end of the support frame is fixedly connected with a substrate, the support frame and the substrate are respectively provided with two pole grooves, one pole groove is fixedly provided with a negative pole, and the other pole groove is fixedly provided with a positive pole. A sealing gasket is arranged between the negative pole and the pole groove, a sealing gasket is arranged between the positive pole and the pole groove, and upper plastic used for sealing the negative pole and the positive pole is arranged at the upper end of the substrate; according to the utility model, a traditional injection molding rubber coating structure is changed, the welding ring is added for welding, the whole structure is fixed through filling of the insulating spacer, and injection molding only plays a role in external rubber coating. Therefore, the problems of poor air tightness, liquid leakage and the like of the battery due to compression springback of the sealing gasket caused by looseness of the injection molding encapsulation are avoided, and meanwhile, the overall strength of the cover plate is also improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery technical field, concretely relates to a leak -proof power battery cover plate structure. BACKGROUND

[0002] In the manufacturing field of power batteries, the cover plate is an important component of the battery pack, and its sealing performance is directly related to the overall safety and service life of the battery. The traditional power battery cover plate structure usually fixes the sealing ring on the cover plate by injection molding process, and ensures the close fit between the sealing ring and the battery shell through the preset compression amount, so as to realize the sealing of the battery. However, this traditional cover plate structure faces serious challenges in high-temperature baking process.

[0003] In the production process of the battery, high-temperature baking is an indispensable step, which helps to solidify the internal materials of the battery and stabilize the performance. However, for the cover plate structure with injection molding fixed sealing ring compression amount, high-temperature baking is a potential risk factor. The injection molding part will shrink and thin under high temperature, and the change amount is usually about 20%. This shrinkage and thinning causes the original preset sealing ring compression amount to rebound, and the fit gap between the sealing ring and the battery shell increases, thereby destroying the original sealing structure.

[0004] The destruction of the sealing structure directly leads to problems such as poor battery airtightness and liquid leakage. During the charging and discharging process of the battery, certain gases will be generated, and if the sealing is poor, these gases will leak out through the increased gap, causing abnormal internal pressure of the battery, and thus affecting the performance and safety of the battery. At the same time, electrolyte may also leak through this gap, not only causing loss of battery capacity, but also causing short circuit, fire and other serious consequences.

[0005] In addition, the traditional cover plate structure often does not fully consider the impact of high-temperature baking on the injection molding part in design, resulting in deviations in the selection of sealing gasket material, size and installation method from actual needs. This design deficiency further exacerbates the decline in battery sealing performance, making the battery more prone to liquid leakage and other safety hazards during long-term use.

[0006] In view of the many deficiencies of the traditional power battery cover plate structure in preventing liquid leakage, it is necessary to develop a new type of leak-proof power battery cover plate structure to solve the problems of shrinkage and thinning of the injection molding part, rebound of the sealing ring compression amount and poor battery airtightness caused by high-temperature baking. This new type of cover plate structure will help to improve the overall sealing performance of the battery, prolong the service life of the battery, and provide strong technical support for the sustainable development of the power battery industry. SUMMARY

[0007] The utility model discloses a purpose at providing a kind of leakage-proof power battery cover plate structure, solve the technical problems of injection molding part shrinkage thinning, sealing ring compression amount rebound and battery air tightness caused by high-temperature baking.

[0008] The utility model discloses a purpose can be realized by following technical scheme:

[0009] A kind of leakage-proof power battery cover plate structure, including support frame, the upper end of the support frame is fixedly connected with base plate, the support frame and base plate are all provided with two pole slot, one pole slot is fixedly installed with negative pole at, another pole slot is fixedly installed with positive pole, the negative pole and positive pole are provided with sealing pad between pole slot, the upper end of the base plate is provided with the upper plastic for sealing negative pole and positive pole.

[0010] Preferably, the support frame is provided with a plurality of support protrusions away from the base plate.

[0011] Preferably, the support protrusions are provided with a plurality of heat dissipation through holes.

[0012] Preferably, the support frame is fixedly provided with a mounting seat, and the base plate is provided with a positioning groove matched with the mounting seat.

[0013] Preferably, the bottom of the positioning groove is provided with a mounting hole, and the mounting seat is provided with a threaded hole for mounting a screw.

[0014] Preferably, the middle of the support frame is provided with an explosion-proof valve, and the base plate is provided with an explosion-proof patch matched with the explosion-proof valve.

[0015] Preferably, the negative pole and the positive pole are provided with an insulating gasket between the base plate.

[0016] Preferably, the negative pole and the positive pole are fixedly provided with a welding ring connected with the insulating gasket.

[0017] Preferably, the negative pole and the positive pole are fixed by laser welding between the welding ring.

[0018] Preferably, the insulating gasket is made of silicone rubber or ceramic.

[0019] The utility model discloses the beneficial effect: change traditional injection molding rubber-coated structure, by increasing welding ring welding, and by insulating gasket filling to fix the overall structure, injection molding only plays the role of external rubber-coated. Thus avoid the compression amount rebound of sealing pad caused by injection molding rubber-coated loose, appear battery air tightness, leakage and other problems, also improve the overall strength of the cover plate. BRIEF DESCRIPTION OF DRAWINGS

[0020] The utility model discloses a purpose can be realized by following technical scheme.

[0021] Figure 1 is a three-dimensional structure schematic diagram of the liquid leakage prevention power battery cover plate structure of the utility model;

[0022] Figure 2 is an axonometric structure schematic diagram of the liquid leakage prevention power battery cover plate structure of the utility model;

[0023] Figure 3 is a top view structure schematic diagram of the liquid leakage prevention power battery cover plate structure of the utility model;

[0024] Figure 4 is a three-dimensional structure schematic diagram of the liquid leakage prevention power battery cover plate structure of the utility model Figure 3 is a sectional view structure schematic diagram of the liquid leakage prevention power battery cover plate structure of the utility model in A-A direction.

[0025] In the figure: 1, base plate; 101, positioning groove; 102, mounting hole; 2, support frame; 21, support protrusion; 22, heat dissipation through hole; 23, mounting seat; 3, explosion-proof valve; 4, explosion-proof patch; 5, negative pole; 6, positive pole; 7, upper plastic; 8, welding ring; 9, insulating gasket; 10, sealing gasket. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the application / utility model will be clearly and completely described below with reference to the drawings in the embodiments of the application / utility model. Obviously, the described embodiments are only part of the embodiments of the application / utility model, rather than all the embodiments. Based on the embodiments in the application / utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the application / utility model.

[0027] In the description of the application / utility model, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application / utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, and a particular orientation configuration and operation, therefore, it cannot be understood as a limitation on the application / utility model. In addition, "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the application / utility model, unless otherwise specified, the meaning of "multiple" is two or more.

[0028] In the description of the application / utility model, it should be explained that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" and the like should be broadly understood, 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 indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0029] Please refer to Figures 1-4 The utility model discloses a kind of leakage-proof power battery cover plate structures, including support frame 2, the upper end of support frame 2 is fixedly connected with base plate 1, two pole slot are provided on support frame 2 and base plate 1, one of pole slot is fixedly installed with negative pole 5, another pole slot is fixedly installed with positive pole 6, sealing gasket 10 is provided between negative pole 5 and positive pole 6 and pole slot, upper plastic 7 for sealing negative pole 5 and positive pole 6 is provided on the upper end of base plate 1.

[0030] In an alternative embodiment, the end of the support frame 2 away from the base plate 1 is provided with a plurality of support protrusions 21.

[0031] It should be noted that the provision of support protrusions 21 improves the overall strength of the entire support frame 2.

[0032] In an alternative embodiment, the support protrusions 21 are provided with a plurality of heat dissipation through holes 22.

[0033] It should be noted that the provision of heat dissipation through holes 22 ensures the heat dissipation performance of the pole.

[0034] In an alternative embodiment, the support frame 2 is fixedly provided with a mounting seat 23, and the base plate 1 is provided with a positioning groove 101 cooperating with the mounting seat 23.

[0035] It should be noted that the provision of the positioning groove 101 ensures the accuracy of the installation between the support frame 2 and the base plate 1.

[0036] In an alternative embodiment, the bottom of the positioning groove 101 is provided with a mounting hole 102, and the mounting seat 23 is provided with a threaded hole for mounting a screw.

[0037] It should be noted that the support frame 2 and the base plate 1 are fixedly connected by screws.

[0038] In an alternative embodiment, the support frame 2 is provided with an explosion-proof valve 3 at the middle portion, and the base plate 1 is provided with an explosion-proof patch 4 cooperating with the explosion-proof valve 3.

[0039] It should be noted that the setting of the explosion-proof patch 4 protects the explosion-proof valve 3.

[0040] In an optional embodiment, an insulating gasket 9 is arranged between the negative pole 5 and the positive pole 6 and the base plate 1, and the insulating gasket 9 is made of silicone rubber or ceramic.

[0041] It should be noted that the high-temperature-resistant property of the insulating gasket 9 avoids the liquid leakage problem caused by the compression rebound of the sealing gasket.

[0042] In an optional embodiment, a welding ring 8 connected with the insulating gasket 9 is fixedly arranged on the outer periphery of the negative pole 5 and the positive pole 6.

[0043] It should be noted that the welding ring 8 ensures the stability of the pole installation.

[0044] In an optional embodiment, the negative pole 5 and the positive pole 6 are fixedly connected with the welding ring 8 through laser welding.

[0045] The working principle of the utility model is: changing the traditional injection molding structure, welding through the welding ring 8, and filling through the insulating gasket 9 to fix the overall structure, and the injection molding only plays the role of external rubber coating. Thus, the compression rebound of the sealing gasket caused by the loosening of the injection molding rubber coating is avoided, the problems of poor battery air tightness and liquid leakage are avoided, and the overall strength of the cover plate is improved.

[0046] The above describes one embodiment of the utility model in detail, but the content described can only be the preferred embodiment of the utility model, and cannot be considered as limiting the implementation range of the utility model. Any equivalent change and improvement within the application range of the utility model should still belong to the patent coverage range of the utility model.

Claims

1. A liquid leakage-proof power battery cover plate structure, characterized in that, The utility model provides a battery, including support frame (2), the upper end of support frame (2) is fixedly connected with base plate (1), both are provided with two pole slot on support frame (2) and base plate (1), one pole slot is fixedly installed with negative pole (5), another pole slot is fixedly installed with positive pole (6), and the sealing gasket (10) is arranged between negative pole (5) and positive pole (6) and pole slot, the upper plastic (7) for sealing negative pole (5) and positive pole (6) is set up on base plate (1) upper end.

2. The liquid leakage-proof power battery cover plate structure according to claim 1, characterized in that, The support frame (2) is provided with a plurality of support protrusions (21) away from the base plate (1).

3. The liquid leakage-proof power battery cover plate structure according to claim 2, characterized in that, The support protrusions (21) are provided with a plurality of heat dissipation through holes (22).

4. The liquid leakage-proof power battery cover plate structure according to claim 3, characterized in that, The support frame (2) is provided with a mounting seat (23), and the base plate (1) is provided with a positioning groove (101) matched with the mounting seat (23).

5. The liquid leakage-proof power battery cover plate structure according to claim 4, characterized in that, The bottom of the positioning groove (101) is provided with a mounting hole (102), and the mounting seat (23) is provided with a threaded hole for mounting a screw.

6. The liquid leakage-proof power battery cover plate structure according to claim 1, characterized in that, The support frame (2) is provided with an explosion-proof valve (3) in the middle, and the base plate (1) is provided with an explosion-proof patch (4) matched with the explosion-proof valve (3).

7. The liquid leakage-proof power battery cover plate structure according to claim 1, characterized in that, The negative pole (5) and the positive pole (6) are provided with an insulating gasket (9) between the base plate (1).

8. The liquid leakage-proof power battery cover plate structure according to claim 7, characterized in that, The negative pole (5) and the positive pole (6) are provided with a welding ring (8) connected with the insulating gasket (9) outside the periphery.

9. The liquid leakage-proof power battery cover plate structure according to claim 8, characterized in that, The negative pole (5) and the positive pole (6) are fixed by laser welding between the welding ring (8).

10. The liquid leakage-proof power battery cover plate structure according to claim 9, characterized in that, The insulating gasket (9) is made of silicone rubber or ceramic.

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