Cover plate assembly, battery and vehicle

Abstract

The utility model belongs to the technical field of batteries, and discloses a cover plate assembly, a battery and a vehicle, the cover plate assembly comprises a cover plate, a pressing ring, a polar plate clamping ring, an insulating washer and a sealing ring, the pressing ring is connected to the cover plate, the polar plate clamping ring is arranged between the cover plate and the pressing ring, and the insulating washer is clamped between the polar plate clamping ring and the pressing ring. The sealing ring is clamped between the cover plate and the polar plate clamping ring and abuts against the insulating washer, the battery comprises the cover plate assembly, and the vehicle comprises the battery. According to the utility model, the sealing ring is clamped between the cover plate and the polar plate clamping ring, the gap between the cover plate and the polar plate clamping ring can be insulated and sealed, and on the basis, the sealing ring also abuts against the insulating washer, so that the sealing ring is matched with the insulating washer, the polar plate clamping ring can be coated more safely and reliably, and the insulativity is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a cover plate subassembly, battery and vehicle. BACKGROUND

[0002] Secondary battery has the advantages of high power density, high energy density, long storage time, and multiple cycle use times, and is widely used in electric bicycles, electric vehicles, and other electric vehicles and energy storage facilities.

[0003] The secondary battery generally includes a winding core assembly, a shell for accommodating the winding core assembly, and a cover plate assembly for sealing an opening of the shell. The cover plate assembly includes a cover plate, a compression ring, a polar plate snap ring, an insulating gasket, and a sealing ring. The sealing ring is clamped between the cover plate and the polar plate snap ring, and the insulating gasket is clamped between the compression ring and the polar plate snap ring. A polar plate is welded on a tab of a winding core in the winding core assembly. During assembly, the winding core assembly and the cover plate assembly are first aligned, and then the polar plate is inserted from the inside into a through hole of the polar plate snap ring on the cover plate assembly and welded. In the prior art, the sealing ring only seals the gap between the cover plate and the polar plate snap ring, and the insulation protection is insufficient, affecting the safety and reliability of the battery during use. SUMMARY

[0004] The utility model discloses a cover plate subassembly, battery and vehicle can effectively improve the insulating property.

[0005] To achieve this purpose, the utility model adopts the following technical scheme:

[0006] The cover plate subassembly includes:

[0007] a cover plate;

[0008] a compression ring connected to the cover plate;

[0009] a polar plate snap ring disposed between the cover plate and the compression ring;

[0010] an insulating gasket clamped between the polar plate snap ring and the compression ring;

[0011] a sealing ring clamped between the cover plate and the polar plate snap ring and abutting against the insulating gasket.

[0012] Preferably, the sealing ring abuts against the compression ring.

[0013] Preferably, one side of the cover plate is provided with a mounting groove, and the compression ring is mounted in the mounting groove.

[0014] Preferably, the cover plate is provided with a receiving groove on the side facing the gasket, and the gasket is installed in the receiving groove.

[0015] Preferably, the cover plate and the gasket are respectively provided with a positioning head and a positioning groove on the side facing each other, and the positioning head is clamped in the positioning groove.

[0016] Preferably, the positioning groove is arranged on the gasket, and the positioning groove and the gasket do not overlap in the orthographic projection on the cover plate in the axial direction.

[0017] Preferably, the inner wall of the center through hole of the cover plate is provided with an inner groove, the inner groove extends to the side of the cover plate facing the gasket, and the gasket extends to the inner groove.

[0018] A battery comprising a winding core assembly and the cover plate assembly, and the pole plate of the winding core assembly is arranged in the through hole of the gasket.

[0019] Preferably, the winding core assembly comprises an insulating support, and the insulating support abuts against the gasket.

[0020] A vehicle comprising a vehicle body and the battery, and the battery is installed on the vehicle body.

[0021] The beneficial effects of the utility model are as follows:

[0022] The gasket is clamped between the cover plate and the gasket, and can insulate and seal the gap between the cover plate and the gasket. On this basis, the gasket also abuts against the insulating gasket, so that the gasket and the insulating gasket cooperate to more safely and reliably cover the gasket, thereby improving the insulation. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structural schematic view of the cover plate assembly of the utility model embodiment one;

[0024] Figure 2 is a disassembled schematic view of the cover plate assembly of the utility model embodiment one;

[0025] Figure 3 is a sectional view of the cover plate assembly of the utility model embodiment one;

[0026] Figure 4 is Figure 3 is an enlarged view of A in figure;

[0027] Figure 5 is a sectional view of the cooperation of the cover plate and the gasket of the utility model embodiment one;

[0028] Figure 6 is a structural schematic diagram of the battery of the embodiment one of the utility model;

[0029] Figure 7 is the exploded schematic diagram of the cover plate assembly of the embodiment two of the utility model;

[0030] Figure 8 is the partial sectional view of the battery of the embodiment one of the utility model;

[0031] Figure 9 is the exploded schematic diagram of the cover plate assembly of the embodiment two of the utility model;

[0032] Figure 10 is the sectional view of the cover plate assembly of the embodiment two of the utility model.

[0033] In the drawing:

[0034] 1, cover plate;11, installation groove;12, accommodating groove;13, positioning head;14, inner groove;

[0035] 2, press ring;21, barrel;22, first flange;23, second flange;

[0036] 3, polar plate snap ring;

[0037] 4, insulating washer;41, plate body;42, first flange;43, second flange;

[0038] 5, sealing ring; 51, positioning groove;

[0039] 100, roll core assembly; 101, polar plate; 102, insulating support;

[0040] 200, shell. Specific implementation

[0041] The embodiment of the utility model is described in detail below, and the example of the embodiment is shown in the drawing, wherein the same or similar reference signs indicate the same or similar parts or the parts with the same or similar function throughout. The embodiment described below by referring to the drawing is exemplary and is intended to explain the utility model and cannot be understood as limiting the utility model.

[0042] In the description of the utility model, unless explicitly defined and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, can be fixedly connected, can be detachably connected, can be mechanically connected, can be electrically connected, can be directly connected, can be indirectly connected through intermediate medium, can be the communication inside two elements or the interaction of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0043] In the description of the utility model, unless another explicit provision and limitation, first feature is in second feature "on" or "under" can include first feature and second feature direct contact, also can include first feature and second feature is not direct contact but is through the contact between other features between them. Moreover, first feature is in second feature "on", "above" and "on" include first feature is in second feature directly above and oblique, or just indicate that first feature horizontal height is higher than second feature. First feature is in second feature "under", "below" and "under" include first feature is in second feature directly below and oblique, or just indicate that first feature horizontal height is less than second feature.

[0044] The technical scheme of the utility model is further illustrated below by specific implementation manners in connection with the drawings.

[0045] As Figures 1-8 Indicated, the utility model provides a kind of cover plate assembly, including cover plate 1, compression ring 2, polar plate snap ring 3, insulating washer 4 and sealing ring 5.Wherein, compression ring 2 is connected to cover plate 1, polar plate snap ring 3 is set between cover plate 1 and compression ring 2, insulating washer 4 is clamped between polar plate snap ring 3 and compression ring 2, sealing ring 5 is clamped between cover plate 1 and polar plate snap ring 3, and it is abutted on insulating washer 4.

[0046] In the utility model, sealing ring 5 is clamped between cover plate 1 and polar plate snap ring 3, can carry out insulating sealing to the gap between cover plate 1 and polar plate snap ring 3, on this basis, sealing ring 5 is also abutted on insulating washer 4, so that sealing ring 5 and insulating washer 4 cooperate, can more safely and reliably cover polar plate snap ring 3, to improve insulating property.

[0047] Specifically, sealing ring 5 is abutted on compression ring 2.The above-mentioned setting makes that sealing ring 5, insulating washer 4 and compression ring 2, two two abut, further improve sealing insulating property, and make the positioning installation of sealing ring 5 more accurate.

[0048] In the embodiment, to ensure stable and reliable insulation of the pole, the sealing ring 5 forms a first interference fit area with the compression ring 2 after assembly, and forms a second interference fit area with the vertical flanging of the insulating washer 4, and the two interference fits can effectively ensure the insulation protection between the pole clamping ring 3 and the compression ring 2 and the cover plate 1. To ensure stable and reliable sealing of the pole, the main body of the sealing ring 5 is compressed between the pole clamping ring 3 and the cover plate 1 to form a third interference fit area, thereby ensuring the sealing performance. The compressed and deformed sealing ring 5 can extend to the part of the assembly gap between the sealing ring 5 and the cover plate 1, thereby avoiding excessive compression of the sealing ring 5 that causes the assembly to fail. During assembly, the pole clamping ring 3 deforms a part of the sealing ring 5, the insulating washer 4 deforms a part of the sealing ring 5, and the compression ring 2 deforms a part of the sealing ring 5.

[0049] Specifically, as shown in Figure 4 , the compression ring 2 includes a barrel 21, a first flange 22 and a second flange 23, the first flange 22 and the second flange 23 are connected to the two ends of the barrel 21, respectively, and the first flange 22 extends away from the axis of the barrel 21, and the second flange 23 extends toward the axis of the barrel 21, and the first flange 22 is connected to the cover plate 1.

[0050] More specifically, as shown in Figure 4 , the insulating washer 4 includes a plate body 41, a first flange 42 and a second flange 43, the plate body 41 is in the shape of a ring plate, the first flange 42 is arranged at the outer edge of the plate body 41, and the second flange 43 is arranged at the inner edge of the plate body 41, the plate body 41 is clamped between the pole clamping ring 3 and the second flange 23 along the axial direction, the first flange 42 is annularly arranged at the outer periphery of the pole clamping ring 3 and clamped between the pole clamping ring 3 and the inner wall of the barrel 21, and the second flange 43 extends into the second flange 23 and abuts against the inner wall of the second flange 23.

[0051] In the embodiment, the compression ring 2, the insulating washer 4, the pole clamping ring 3 and the sealing ring 5 are assembled on the cover plate 1 to form a pole, the pole hole is formed by the through holes of the compression ring 2, the insulating washer 4, the pole clamping ring 3 and the sealing ring 5 in the middle of the pole, the pole is divided into a positive pole and a negative pole, the material of the pole clamping ring 3 in the positive pole is aluminum, the material of the pole clamping ring 3 in the negative pole is copper, in addition, the material of the compression ring 2 is aluminum alloy, the material of the insulating washer 4 is PPS, PBT, LCP or ceramic, and the material of the sealing ring 5 is fluorine rubber, and the height of the compressed sealing ring 5 is 0.6mm-0.8mm.

[0052] Specifically, as shown in Figure 5 , one side of the cover plate 1 is provided with a mounting groove 11, and the compression ring 2 is mounted in the mounting groove 11. The above arrangement makes the positioning and installation of the compression ring 2 on the cover plate 1 more accurate and reliable.

[0053] More specifically, the cover plate 1 is provided with a receiving groove 12 on the side facing the polar plate clamping ring 3, the receiving groove 12 extends to the center through hole of the cover plate 1, and the sealing ring 5 is installed in the receiving groove 12. The above arrangement makes the positioning and installation of the sealing ring 5 on the cover plate 1 more accurate and reliable.

[0054] In this embodiment, the receiving groove 12 is arranged at the groove bottom of the mounting groove 11, the first flange 22 is clamped in the mounting groove 11, and is welded to the joint of the cover plate 1, and the barrel 21 and the second flange 23 protrude from the groove opening of the mounting groove 11.

[0055] Specifically, the side of the cover plate 1 and the sealing ring 5 facing each other is respectively provided with a positioning head 13 and a positioning groove 51, and the positioning head 13 is clamped in the positioning groove 51. The above arrangement further improves the positioning and installation accuracy of the sealing ring 5, and avoids the displacement of the sealing ring 5 in the receiving groove 12.

[0056] More specifically, the positioning groove 51 is arranged on the sealing ring 5, and the positioning groove 51 and the polar plate clamping ring 3 do not overlap in the orthogonal projection on the cover plate 1 along the axial direction. The above arrangement makes the positioning groove 51 on the sealing ring 5 away from the polar plate clamping ring 3, avoiding the influence of the thinning of the sealing ring 5 on the insulation property at the position corresponding to the polar plate clamping ring 3.

[0057] In this embodiment, the positioning head 13 is arranged at the groove bottom of the receiving groove 12, and is annular, and the positioning head 13 and the first flange 42 of the insulating gasket 4 are arranged opposite along the axial direction of the cover plate 1.

[0058] Specifically, the inner wall of the center through hole of the cover plate 1 is provided with an inner groove 14, the inner groove 14 extends to the side of the cover plate 1 facing the polar plate clamping ring 3, the sealing ring 5 extends to the inner groove 14 and protrudes inwardly from the center through hole of the cover plate 1. The above arrangement can position the sealing ring 5 and further improve the insulation and sealing effect.

[0059] Overall, in order to ensure the stability of the assembly and positioning of the sealing ring 5 during assembly, the width of the sealing ring 5 of the present embodiment is designed to be widened to ensure its overall rigidity, and the annular positioning head 13 is arranged at the groove bottom of the receiving groove 12 of the cover plate 1, and the annular positioning groove 51 is arranged at the corresponding position of the sealing ring 5. The positioning head 13 and the positioning groove 51 are nested and matched to ensure the accuracy of the assembly and positioning of the sealing ring 5. The positioning head 13 is arranged opposite to the insulating gasket 4, avoiding the situation that the distance between the polar plate clamping ring 3 and the positioning head 13 of the cover plate 1 is too small after the polar plate clamping ring 3 is assembled and compressed, which affects the high-voltage insulation. The inner wall of the center through hole of the cover plate 1 is provided with an inner groove 14, which cooperates with the lower flange of the inner hole of the sealing ring 5, and can also assist in positioning the sealing ring 5.

[0060] For the sealing ring 5 and the cover plate 1 fit size, in order to ensure that the sealing ring 5 and the cover plate 1 positioning reliable, the relevant key size is as follows: the width of the positioning head 13 on the cover plate 1 is 0.4mm-0.6mm, the height of the positioning head 13 is 0.3mm-0.6mm, the depth of the positioning groove 51 of the sealing ring 5 is equal to the height of the positioning head 13, the assembly gap of the positioning groove 51 and the positioning head 13 is 0.05mm-0.3mm, in order to ensure that the sealing ring 5 strength whole reliable, the proportion relationship of the size C1 compressed to the sealing ring 5 after assembly and the original thickness C0 of the sealing ring 5 is 0.25≤C1 / C0≤0.55, the residual thickness of the cover plate 1 bottom containing groove 12 position is 0.7mm-1.3mm.

[0061] In the embodiment, the pole post is composed of several parts such as the compression ring 2, the insulating washer 4, the pole plate snap ring 3 and the sealing ring 5, the compression ring 2, the insulating washer 4, the pole plate snap ring 3 and the sealing ring 5 are assembled on the cover plate 1 to form the pole post, the pole post is designed with a pole post hole, the insulating washer 4 is nested in the compression ring 2 in the assembly process, the pole plate snap ring 3 is nested in the insulating washer 4, the sealing ring 5 is assembled in the corresponding containing groove 12 of the cover plate 1 around the center through hole of the cover plate 1, the compression ring 2 preassembled presses the sealing ring 5 and is assembled in the mounting groove 11 of the cover plate 1, and is welded and fixed at the joint of the compression ring 2 and the cover plate 1.

[0062] As shown in the figure, Figures 6-8 The embodiment further provides a battery, which comprises the winding core assembly 100 and the cover plate assembly, and the pole plate 101 of the winding core assembly 100 is arranged in the through hole of the pole plate snap ring 3.

[0063] In the battery, the sealing ring 5 is clamped between the cover plate 1 and the pole plate snap ring 3, can insulate and seal the gap between the cover plate 1 and the pole plate snap ring 3, on this basis, the sealing ring 5 also abuts against the insulating washer 4, so that the sealing ring 5 and the insulating washer 4 cooperate, can more safely and reliably coat the pole plate snap ring 3, thereby improving the insulation.

[0064] Specifically, the winding core assembly 100 comprises a winding core and an insulating support 102, the insulating support 102 is arranged on the top of the winding core, and the insulating support 102 abuts against the sealing ring 5. The above arrangement, the insulating support 102 and the sealing ring 5 abut against each other, further improves the insulation and sealing effect.

[0065] More specifically, the top of the winding core in the winding core assembly 100 is provided with a positive electrode lug and a negative electrode lug, the positive electrode lug and the negative electrode lug are respectively welded to a positive electrode plate and a negative electrode plate, the outer periphery of the electrode lug and the pole plate 101 is provided with the insulating support 102, the insulating support 102 is made of plastic material and plays an insulating role, the outer periphery of the insulating support 102 on the electrode lug is provided with a flange structure, and the flange structure abuts against the sealing ring 5.

[0066] More specifically, the positive plate is made of pure aluminum material, the negative plate is made of copper-aluminum composite material, the top is aluminum, the bottom is copper, the copper plate bottom is welded with the copper tab of the core, and the copper plate four around the step edge is welded with the gasket ring 3 of the corresponding negative pole to seal.

[0067] In this embodiment, the insulating support 102 abuts against the core, and the battery further comprises a shell 200 sleeved on the outside of the core assembly 100, and the cover plate assembly connects the opening of the shell 200. During assembly, the plate 101 on the core assembly 100 passes through the pole hole of the cover plate assembly and is fitted with the pole hole, and then is welded and sealed. After the cover plate assembly is fitted with the shell 200, it is welded and sealed.

[0068] After the battery is assembled, the plate 101 in the core assembly 100 passes through the pole hole of the cover plate assembly, and the edge of the plate 101 is welded and sealed with the inner hole edge of the gasket ring 3. In order to ensure the insulation protection between the tab and the cover plate 1, the sealing ring 5 close to the inner side of the center through hole of the cover plate 1 is designed with a downward flanging structure, which will be interference fit with the upper flanging of the insulating support 102 around the core tab, to ensure the stability and reliability of the insulation protection. Since the downward flanging part of the sealing ring 5 is nested in the inner groove 14 of the inner wall of the center through hole of the cover plate 1, the protruding range of the sealing ring 5 from the center through hole of the cover plate 1 is 0.05mm-0.2mm, which can ensure the maximum size of the opening area of the cover plate 1 and the maximum space for assembling the tab.

[0069] The battery of the embodiment comprises a cover plate assembly, a roll core assembly 100 and a shell 200, the roll core assembly 100 is provided with a polar plate 101 and an insulating support 102 structure; the polar post on the cover plate assembly is composed of a compression ring 2, an insulating washer 4, a polar plate snap ring 3 and a sealing ring 5, the cover plate 1 is provided with a containing groove 12 at the position corresponding to the installation position of the sealing ring 5, an annular positioning head 13 is arranged at the groove bottom of the containing groove 12, and an inner groove 14 is arranged at the inner side of the containing groove 12 and used for cooperating with the sealing ring 5 to ensure the positioning stability, the sealing ring 5 is designed to be widened and covers the containing groove 12 area of the cover plate 1 as a whole, the rigidity of the sealing ring 5 is improved, meanwhile, the sealing ring 5 is provided with a positioning groove 51 and an inner hole lower edge corresponding to the positioning head 13 and the inner groove 14 on the cover plate 1, so that the positioning stability between the sealing ring 5 and the cover plate 1 can be ensured, the sealing ring 5 is in interference fit with the compression ring 2 and the insulating washer 4 after assembly, so that the insulation protection is ensured to be in place, the sealing ring 5 is provided with a downward turning edge close to the inner side of the center through hole of the cover plate 1, the turning edge cooperates with the turning edge of the insulating support 102 to ensure the insulation protection, the material extension of the sealing ring 5 after interference compression can be filled into the assembly gap between the sealing ring 5 and the cover plate 1, the relevant size boundary design of the sealing ring 5 and the cover plate 1 can ensure the positioning stability of the sealing ring 5 and the sealing reliability, the sealing ring 5 is nested with the containing groove 12 of the cover plate 1, the lower edge part of the sealing ring 5 is nested in the inner groove 14 of the cover plate 1, so that the size occupation of the sealing ring 5 in the opening space can be effectively reduced, the available size of the opening space is improved, the polar post can be adjusted in the whole height to adapt to different system architecture requirements by adjusting the containing groove 12 of the cover plate 1 and the size of the polar plate snap ring 3, and the polar post height range is 0-3.5mm.

[0070] The embodiment also provides a vehicle comprising a vehicle body and the battery.

[0071] In the vehicle, the sealing ring 5 is clamped between the cover plate 1 and the polar plate snap ring 3, can insulate and seal the gap between the cover plate 1 and the polar plate snap ring 3, on this basis, the sealing ring 5 also abuts against the insulating washer 4, so that the sealing ring 5 and the insulating washer 4 cooperate, can more safely and reliably coat the polar plate snap ring 3, and the insulation is improved.

[0072] Embodiment two

[0073] As shown in Figures 9-10 The embodiment provides a cover plate assembly, a battery and a vehicle, which are the same as or correspond to the same or corresponding parts of the first embodiment. For the sake of simplicity, only the differences between the embodiment and the first embodiment will be described below.

[0074] The difference between the embodiment and the embodiment one is that the pressing ring 2 in the cover plate assembly is flat, is installed in the installation groove 11 on one side of the cover plate 1, the top surface is flush with the top surface of the cover plate 1, and the sealing ring 5 only abuts against the insulating washer 4 and the polar plate snap ring 3.

[0075] Obviously, the above embodiments of the utility model are only for clear illustration of the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled in the art, other different forms of changes or changes can be made on the basis of the above description. Here, all the embodiments are not enumerated. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A cover plate assembly, characterized in that, include: Cover plate (1); A pressure ring (2) is connected to the cover plate (1); Electrode retaining ring (3), wherein the electrode retaining ring (3) is disposed between the cover plate (1) and the pressure ring (2); An insulating washer (4) is sandwiched between the electrode retaining ring (3) and the pressure ring (2); A sealing ring (5) is sandwiched between the cover plate (1) and the electrode retaining ring (3) and abuts against the insulating gasket (4).

2. The cover plate assembly according to claim 1, characterized in that, The sealing ring (5) abuts against the pressure ring (2).

3. The cover plate assembly according to claim 1, characterized in that, The cover plate (1) has an installation groove (11) on one side, and the pressure ring (2) is installed in the installation groove (11).

4. The cover plate assembly according to claim 1, characterized in that, The cover plate (1) has a receiving groove (12) on the side facing the electrode retaining ring (3), the receiving groove (12) extends to the central through hole of the cover plate (1), and the sealing ring (5) is installed in the receiving groove (12).

5. The cover plate assembly according to claim 1, characterized in that, The cover plate (1) and the sealing ring (5) are respectively provided with a positioning head (13) and a positioning groove (51) on opposite sides, and the positioning head (13) is fitted into the positioning groove (51).

6. The cover plate assembly according to claim 5, characterized in that, The positioning groove (51) is provided on the sealing ring (5), and the orthographic projections of the positioning groove (51) and the electrode retaining ring (3) on the cover plate (1) along the axial direction do not overlap.

7. The cover plate assembly according to any one of claims 1-6, characterized in that, The inner wall of the central through hole of the cover plate (1) is provided with an inner groove (14), the inner groove (14) extends to the side of the cover plate (1) facing the electrode retaining ring (3), and the sealing ring (5) extends to the inner groove (14).

8. A battery, characterized in that, It includes a core assembly (100) and a cover plate assembly according to any one of claims 1-7, wherein the electrode plate (101) of the core assembly (100) passes through the through hole of the electrode plate retaining ring (3).

9. The battery according to claim 8, characterized in that, The core assembly (100) includes an insulating support (102) that abuts against the sealing ring (5).

10. A vehicle, characterized in that, It includes a vehicle body and the battery as described in claim 8 or 9, wherein the battery is mounted on the vehicle body.

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