Battery top cover structure and battery

Abstract

The utility model relates to the technical field of energy storage equipment, in particular to a battery top cover structure and a battery, and the battery top cover structure comprises a cover plate, an explosion-proof assembly and an insulation sealing assembly. A first through hole is formed in the cover plate, and the cover plate is made of steel. The anti-explosion assembly comprises a support, a fixing piece and an anti-explosion valve, the support is provided with a second through hole, the anti-explosion valve is connected to the support and covers the second through hole, the anti-explosion valve is made of aluminum, the first end of the support and the fixing piece are arranged on the two sides of the cover plate respectively, and the second end of the support stretches into the first through hole and is connected to the fixing piece. The insulation sealing assembly is arranged between the explosion-proof assembly and the cover plate, so that the explosion-proof assembly and the cover plate are matched in an insulation and sealing mode. The battery comprises a shell and the battery top cover structure, the cover plate covers the opening of the shell, and the cover plate is connected to the shell in a sealing manner. According to the battery, the use safety of the battery can be improved while the structural strength of the cover plate is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage equipment technical field especially relates to a battery top cover structure and battery. BACKGROUND

[0002] The battery top cover structure is provided with an explosion-proof valve to ensure the use safety of the battery. If the cover plate of the battery top cover structure is made of steel material, the structural strength can be higher, and the service life of the battery can be prolonged. The explosion-proof valve is generally directly welded on the cover plate, so the explosion-proof valve also needs to be made of steel material. However, the explosion-proof valve made of steel material has high strength, and it is difficult to process the notch on the explosion-proof valve. The precision of the notch depth and the consistency of each part cannot be guaranteed, which reduces the use safety of the battery. SUMMARY

[0003] One purpose of the utility model is to provide a battery top cover structure which can ensure the structural strength of the cover plate and improve the use safety of the battery.

[0004] To achieve this purpose, the utility model adopts the following technical scheme:

[0005] The utility model provides a battery top cover structure, which comprises:

[0006] A cover plate is provided with a first through hole, and the cover plate is made of steel material;

[0007] An explosion-proof assembly comprises a bracket, a fixing piece and an explosion-proof valve. The bracket has a second through hole. The explosion-proof valve is connected to the bracket and covers the second through hole. The explosion-proof valve is made of aluminum material. The first end of the bracket and the fixing piece are respectively arranged on both sides of the cover plate. The second end of the bracket extends into the first through hole and is connected to the fixing piece.

[0008] An insulating and sealing assembly is arranged between the explosion-proof assembly and the cover plate to insulate and seal the explosion-proof assembly and the cover plate.

[0009] Optionally, the second end is welded to the fixing piece.

[0010] Optionally, the fixing piece is in a ring structure, the second end is in a tubular structure, the tubular structure is inserted into the inner ring of the ring structure, and the outer wall of the tubular structure is welded to the inner ring side wall of the ring structure.

[0011] Optionally, a stepped surface is arranged in the second through hole, the stepped surface faces away from the fixing piece, and the explosion-proof valve is connected to the stepped surface in a circumferential direction.

[0012] Optionally, the explosion-proof valve is welded to the bracket.

[0013] Optionally, the insulation sealing assembly comprises a first ring clamped between the first end and a plate surface of the cover plate towards the first end.

[0014] And / or, the insulation sealing assembly comprises a second ring clamped between an inner wall of the first through hole and an outer wall of the second end.

[0015] And / or, the insulation sealing assembly comprises a third ring clamped between an inner wall of the second ring and an outer wall of the second end.

[0016] And / or, the insulation sealing assembly comprises a fourth ring clamped between the fixing member and a plate surface of the cover plate towards the fixing member.

[0017] And / or, the insulation sealing assembly comprises a fifth ring sleeved on an outer side wall of the fixing member.

[0018] And / or, the insulation sealing assembly comprises a sixth ring sleeved on a part of the outer side wall of the first end.

[0019] Optionally, the sixth ring, the first ring and the second ring are sequentially connected.

[0020] And / or, the third ring, the fourth ring and the fifth ring are sequentially connected.

[0021] Optionally, an end of the third ring along the axial direction of the first through hole is in interference fit with an end surface of the first end towards the cover plate.

[0022] And / or, the fourth ring is in interference fit with both the fixing member and a plate surface of the cover plate towards the fixing member.

[0023] And / or, an end of the second ring along the axial direction of the first through hole is in interference fit with an end surface of the fourth ring towards the first end.

[0024] Optionally, the explosion-proof assembly further comprises an explosion-proof patch connected to an end surface of the first end away from the fixing member, and the explosion-proof patch covers the explosion-proof valve.

[0025] Another purpose of the utility model is to provide a battery which can ensure the structural strength of the cover plate and improve the use safety of the battery.

[0026] To achieve the purpose, the utility model adopts the following technical scheme.

[0027] The utility model provides a battery, including shell and above-mentioned battery top cover structure, the cover plate covers and sets in the opening place of shell, and the cover plate sealing connection is in the shell.

[0028] The utility model discloses a beneficial effect:

[0029] The utility model provides a battery top cover structure, including cover, explosion -proof subassembly and insulating seal subassembly. Among them, the first through -hole is set up on the cover, and the cover is steel material. Explosion -proof subassembly includes support, fixed part and explosion -proof valve, and the support has the second through -hole, and the explosion -proof valve is connected in the support and covers the second through -hole, and the explosion -proof valve is aluminum material, and the first end of support and fixed part are arranged on the both sides of cover respectively, and the second end of support is connected in fixed part and is inserted into the first through -hole. Insulating seal subassembly is arranged between explosion -proof subassembly and cover to make explosion -proof subassembly and cover insulating seal cooperation. Through the support and fixed part cooperation support explosion -proof valve, can avoid the direct welding between explosion -proof valve and cover, to be able to set up cover and explosion -proof valve as different material. Cover is made of steel material, can guarantee the structural strength of cover, prolongs the service life of battery. Explosion -proof valve is made of aluminum material, can reduce the processing difficulty of the notch of explosion -proof valve, improves the precision of notch depth and the consistency everywhere, guarantees the use safety of battery.

[0030] The utility model also provides a battery, including shell and above -mentioned battery top cover structure, and the cover is set on the opening of shell, and the cover is sealedly connected in shell. The battery can guarantee the structural strength of cover, and improve the use safety of battery. ACCOUNT OF DRAWINGS

[0031] Figure 1 It is the structural schematic diagram of the first visual angle of the battery provided by the utility model embodiment;

[0032] Figure 2 It is the structural schematic diagram of the second visual angle of the battery provided by the utility model embodiment;

[0033] Figure 3 It is Figure 2 A-A sectional view in the of the utility model embodiment;

[0034] Figure 4 It is Figure 3 The enlarged view of B in the of the utility model embodiment.

[0035] In the drawing:

[0036] 1, cover;

[0037] 2, support;21, first end;22, second end;23, step surface;

[0038] 3, fixed part;4, explosion -proof valve;

[0039] 5, plastic part;51, first ring;52, second ring;53, sixth ring;

[0040] 6, sealing ring;61, third ring;62, fourth ring;63, fifth ring;

[0041] 7, explosion-proof patch; 8, pole assembly; 9, shell. DETAILED DESCRIPTION

[0042] The technical solutions of the utility model will be further described below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for the convenience of description.

[0043] In the description of the utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or it can be detachable connection; it can be mechanical connection, or it can be electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between 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.

[0044] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0045] The battery top cover structure is provided with an explosion-proof valve to ensure the safety of the battery. If the cover plate of the battery top cover structure is made of steel material, it can have higher structural strength and prolong the service life of the battery. The explosion-proof valve is generally directly welded on the cover plate, so the explosion-proof valve also needs to be made of steel material, but the explosion-proof valve made of steel material has high strength, the difficulty of notch processing on the explosion-proof valve is large, the precision of notch depth and the consistency of each part are difficult to guarantee, which reduces the safety of the battery.

[0046] Therefore, the embodiment provides a battery top cover structure to solve the above problems, which can ensure the structural strength of the cover plate 1 and improve the safety of the battery.

[0047] As Figures 1-4As shown, the battery top cover structure of the embodiment comprises a cover plate 1, an explosion-proof assembly and an insulation sealing assembly. The cover plate 1 is provided with a first through hole, and the cover plate 1 is made of steel. The explosion-proof assembly comprises a bracket 2, a fixing member 3 and an explosion-proof valve 4. The bracket 2 is provided with a second through hole, and the explosion-proof valve 4 is connected to the bracket 2 and covers the second through hole. The explosion-proof valve 4 is made of aluminum, and the first end 21 of the bracket 2 and the fixing member 3 are arranged on the two sides of the cover plate 1 respectively. The second end 22 of the bracket 2 extends into the first through hole and is connected to the fixing member 3. The insulation sealing assembly is arranged between the explosion-proof assembly and the cover plate 1 to insulate and seal the explosion-proof assembly and the cover plate 1.

[0048] The bracket 2 and the fixing member 3 cooperate to support the explosion-proof valve 4, which can avoid direct welding between the explosion-proof valve 4 and the cover plate 1, so that the cover plate 1 and the explosion-proof valve 4 can be made of different materials. The cover plate 1 is made of steel, which can ensure the structural strength of the cover plate 1 and prolong the service life of the battery. The explosion-proof valve 4 is made of aluminum, which can reduce the processing difficulty of the notch of the explosion-proof valve 4, improve the precision of the notch depth and the consistency of each part, and ensure the safety of the battery.

[0049] Optionally, the second end 22 is welded to the fixing member 3. Optionally, the second end 22 and the fixing member 3 are laser welded to ensure the connection strength of the two. Optionally, the fixing member 3 is in a ring structure, and the second end 22 is in a tubular structure. The tubular structure is inserted into the inner ring of the ring structure, and the outer wall of the tubular structure is welded to the inner ring side wall of the ring structure. The circumferential welding can ensure the firmness of the connection between the bracket 2 and the fixing member 3.

[0050] It can be known that the first end 21 is arranged radially protruding, and the radial dimension of the first end 21 is greater than the radial dimension of the first through hole, so that the first end 21 can be located on one side of the cover plate 1. Similarly, the radial dimension of the fixing member 3 is also greater than the radial dimension of the first through hole, so that the fixing member 3 can be located on the other side of the cover plate 1, so that the second end 22 is fixed and the first end 21 cannot move away from the cover plate 1.

[0051] Optionally, a step surface 23 is arranged in the second through hole, the step surface 23 faces away from the fixing member 3, and the explosion-proof valve 4 is connected to the step surface 23 circumferentially. The step surface 23 can limit the position of the explosion-proof valve 4 to a certain extent, prevent misalignment during assembly, and try to make the explosion-proof valve 4 and the first through hole coaxially arranged.

[0052] Optionally, the explosion-proof valve 4 is welded to the bracket 2, that is, the explosion-proof valve 4 is welded at the step surface 23.

[0053] Optionally, the insulation sealing assembly comprises a first ring 51, and the first ring 51 is clamped between the first end 21 and the plate surface of the cover plate 1 facing the first end 21 to ensure the insulation sealing between the first end 21 and the plate surface of the cover plate 1 facing the first end 21.

[0054] Optionally, the insulation sealing assembly comprises a second ring 52, which is clamped between the inner wall of the first through hole and the outer wall of the second end 22 to ensure insulation sealing between the inner wall of the first through hole and the outer wall of the second end 22.

[0055] Optionally, the insulation sealing assembly comprises a third ring 61, which is clamped between the inner wall of the second ring 52 and the outer wall of the second end 22 to further ensure that the second ring 52 presses against the inner wall of the first through hole and fills the gap between the second ring 52 and the second end 22 of the bracket 2.

[0056] Optionally, the insulation sealing assembly comprises a fourth ring 62, which is clamped between the fixing member 3 and the plate surface of the cover plate 1 facing the fixing member 3 to ensure insulation sealing between the fixing member 3 and the plate surface of the cover plate 1 facing the fixing member 3.

[0057] Optionally, the insulation sealing assembly comprises a fifth ring 63, which is sleeved on the outer side wall of the fixing member 3. Optionally, the insulation sealing assembly comprises a sixth ring 53, which is sleeved on part of the outer side wall of the first end 21. Optionally, the sixth ring 53 is located at the limiting groove of the first end 21.

[0058] Optionally, the sixth ring 53, the first ring 51 and the second ring 52 are connected in sequence to prevent the bracket 2 and the cover plate 1 from contacting at the connection. Optionally, in this embodiment, the sixth ring 53, the first ring 51 and the second ring 52 are an integral whole and all belong to the plastic member 5, which has insulation sealing properties.

[0059] Optionally, the third ring 61, the fourth ring 62 and the fifth ring 63 are connected in sequence to prevent the bracket 2 and the cover plate 1 from contacting at the connection. Optionally, in this embodiment, the third ring 61, the fourth ring 62 and the fifth ring 63 are an integral whole and all belong to the sealing ring 6, which has insulation sealing properties.

[0060] Of course, in other embodiments, the first ring 51, the second ring 52, the third ring 61, the fourth ring 62, the fifth ring 63 and the sixth ring 53 can also be connected and integrated in different ways to form plastic members 5 or sealing rings 6 of different forms.

[0061] Optionally, the third ring 61 is in interference fit with the end surface of the first end 21 facing the cover plate 1 along the axial direction of the first through hole to ensure that there is no liquid leakage at this position and further improve the sealing between the explosion-proof assembly and the cover plate 1.

[0062] Optionally, the fourth ring 62 is in interference fit with the fixing member 3 and the plate surface of the cover plate 1 facing the fixing member 3 to ensure that there is no liquid leakage at these two positions and further improve the sealing between the explosion-proof assembly and the cover plate 1.

[0063] Optionally, the second ring 52 is in interference fit with the fourth ring 62 at the end of the first through hole axially towards the end face of the first end 21 to ensure no liquid leakage at this position and further improve the sealing between the explosion-proof assembly and the cover plate 1. The interference fit described above can block all liquid leakage paths and ensure reliable sealing of the insulation sealing assembly.

[0064] Optionally, the explosion-proof assembly further comprises an explosion-proof patch 7. Since in the present embodiment the first end 21 is located outside the battery and the fixing member 3 is located inside the battery, the explosion-proof patch 7 is connected to the end face of the first end 21 away from the fixing member 3 and covers the explosion-proof valve 4 to protect the explosion-proof valve 4.

[0065] Of course, in other embodiments, if the first end 21 is located inside the battery and the fixing member 3 is located outside the battery, the explosion-proof patch 7 is connected to the end face of the second end 22 to protect the explosion-proof valve 4.

[0066] Optionally, in the present embodiment, the shapes of the explosion-proof valve 4 and the explosion-proof patch 7 are consistent with the shape of the first through hole, and the sizes are different. The bracket 2 and the fixing member 3 are coaxially arranged with the first through hole, and the cross-sectional shapes of the bracket 2 and the fixing member 3 are consistent with the shape of the first through hole, and the sizes are different. Optionally, the shapes of the explosion-proof valve 4, the explosion-proof patch 7, and the first through hole are all oval, the shape of the second through hole is also oval, the cross-sectional shapes of the inner and outer rings of the bracket 2 are both oval, the cross-sectional shapes of the inner and outer rings of the fixing member 3 are also both oval, and the cross-sectional shapes of the inner and outer rings of the plastic member 5 and the sealing ring 6 are also both oval. Of course, in other embodiments, they can all be circular, polygonal, or other irregular shapes, which are not limited here.

[0067] Optionally, the battery top cover structure further comprises a pole assembly 8 arranged on the cover plate 1.

[0068] The present embodiment also provides a battery comprising a shell 9 and the above-mentioned battery top cover structure, wherein the cover plate 1 is arranged at the opening of the shell 9 and is sealingly connected to the shell 9.

[0069] Optionally, in the present embodiment, the battery is provided with two battery top cover structures, the shell 9 has two oppositely arranged openings, and the two battery top cover structures are respectively arranged at the two end openings of the shell 9 to jointly form the outer shell of the battery. Optionally, the two battery top cover structures are respectively provided with a positive pole assembly 8 and a negative pole assembly 8. Optionally, the two battery top cover structures are both provided with an explosion-proof assembly to further improve the safety of the battery.

[0070] The cover plate 1 of the battery is made of steel material, so that the structural strength of the cover plate 1 is ensured and the service life of the battery is prolonged. The explosion-proof valve 4 of the battery is made of aluminum material, so that the machining difficulty of the notch of the explosion-proof valve 4 is reduced, the precision and consistency of the notch depth are improved, and the use safety of the battery is ensured.

[0071] Obviously, the above embodiments of the utility model are only examples for clearly illustrating 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 variations can be made on the basis of the above description. Here, all the embodiments are not required to be exhausted. 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 battery top cover structure, characterized by, The utility model relates to a cover plate (1) is provided with first through -hole, and the cover plate (1) is steel material quality; Explosion -proof assembly, including support (2), fixed part (3) and explosion -proof valve (4), the support (2) has second through -hole, the explosion -proof valve (4) is connected in the support (2) and covers the second through -hole, the explosion -proof valve (4) is aluminum material quality, the first end (21) of support (2) and fixed part (3) are arranged respectively in both sides of cover plate (1), and the second end (22) of support (2) is connected in fixed part (3) and stretches into first through -hole; Insulation sealing assembly is arranged between the explosion -proof assembly and the cover plate (1) to make the explosion -proof assembly and the cover plate (1) insulation sealing cooperation. The second end (22) is welded to the fixed part (3).

2. The battery cup structure of claim 1, wherein, The fixed part (3) is a ring structure, the second end (22) is a tubular structure, the tubular structure is inserted into the inner ring of the ring structure, and the outer wall of the tubular structure is welded to the inner ring side wall of the ring structure.

3. The battery cup structure of claim 2, wherein, A step surface (23) is provided in the second through -hole, the step surface (23) faces away from the fixed part (3), and the explosion -proof valve (4) is connected circumferentially to the step surface (23).

4. The battery cup structure of claim 1, wherein, The explosion -proof valve (4) is welded to the support (2).

5. The battery cover structure of claim 1, wherein The insulation sealing assembly includes a first ring (51) clamped between the first end (21) and the plate surface of the cover plate (1) facing the first end (21); 6. The battery cover structure according to any one of claims 1 to 5, wherein And / or, the insulation sealing assembly includes a second ring (52) clamped between the inner wall of the first through -hole and the outer wall of the second end (22); And / or, the insulation sealing assembly includes a third ring (61) clamped between the inner wall of the second ring (52) and the outer wall of the second end (22); And / or, the insulation sealing assembly includes a fourth ring (62) clamped between the fixed part (3) and the plate surface of the cover plate (1) facing the fixed part (3); And / or, the insulation sealing assembly includes a fifth ring (63) sleeved on the outer side wall of the fixed part (3); And / or, the insulation sealing assembly includes a sixth ring (53) sleeved on part of the outer side wall of the first end (21). The sixth ring (53), the first ring (51) and the second ring (52) are connected in sequence; 7. The battery cup structure of claim 6, wherein, And / or, the third ring (61), the fourth ring (62) and the fifth ring (63) are connected in sequence. The third ring (61) is interference fit with the end surface of the first end (21) facing the cover plate (1) along the axial direction of the first through -hole; 8. The battery cup structure of claim 6, wherein, And / or, the fourth ring (62) is interference fit with the plate surface of the cover plate (1) facing the fixed part (3) and the fixed part (3); And / or, the second ring (52) is interference fit with the end surface of the fourth ring (62) facing the first end (21) along the axial direction of the first through -hole. ​ 9. The battery cover structure according to any one of claims 1 to 5, wherein The explosion-proof assembly further comprises an explosion-proof patch (7) connected to the end face of the first end (21) away from the fixing member (3), and the explosion-proof patch (7) covers the explosion-proof valve (4).

10. A battery characterized by The battery top cover structure as claimed in any one of claims 1-9 is applied to a battery, which comprises a shell (9) and the battery top cover structure, the cover plate (1) is arranged at the opening of the shell (9), and the cover plate (1) is sealingly connected to the shell (9).

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