Battery top cover, battery shell and battery monomer

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery top cover, a battery shell and a battery monomer. The battery top cover comprises a cover body, an anti-explosion area is arranged on the cover body, anti-explosion nicks are arranged in the anti-explosion area, the anti-explosion nicks are arranged in a plane spiral shape, the plane spiral extends in the circumferential direction of the inner side of the anti-explosion area, and the numerical value range of the number N of turns of the plane spiral is 1lt. Nlt; 2. The battery top cover can meet the requirement that a battery monomer with a high-strength battery shell needs a low blasting value. The battery shell comprises a shell body and the battery top cover, the cover body covers the opening of the shell body, and the battery shell can meet the requirement of low explosion value. The battery monomer comprises a battery cell and the battery shell, and the battery cell is positioned in the battery shell, so that the requirement of low explosion value can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery top cover, battery shell and battery monomer. BACKGROUND

[0002] The burst value of the battery explosion-proof valve refers to the threshold value of the explosion-proof valve automatically opening when the internal pressure of the battery reaches a certain value. When the internal pressure of the battery rises due to overcharging, overheating or short circuit, etc., the explosion-proof valve will open when the pressure reaches the burst value, releasing gas to prevent the battery from exploding or catching fire. Therefore, the design of the battery explosion-proof valve is an important technical link in the production process of the battery, and the burst value of the explosion-proof valve is the most important in the design of the explosion-proof valve.

[0003] Since the pre-plated nickel steel material (a metal material pre-plated with a layer of nickel on the surface of the steel material) has advantages in performance and internal corrosion compared to aluminum material, the pre-plated nickel steel material is usually the preferred material for battery shells. However, the pre-plated nickel steel material itself is relatively hard, and the battery shell (hereinafter referred to as "high-strength battery shell") made of it cannot meet the low burst value requirement of the battery according to the conventional O-shaped and C-shaped design line marks.

[0004] Therefore, it is urgent to provide a battery top cover, a battery shell and a battery monomer. UTILITY MODEL CONTENTS

[0005] The first purpose of the utility model is to provide a battery top cover that can meet the low burst value requirement of the battery monomer with a high-strength battery shell.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The battery top cover comprises a cover body, the cover body is provided with an explosion-proof area, the explosion-proof area is provided with an explosion-proof mark, the explosion-proof mark is arranged in a planar spiral, the planar spiral extends along the inner side of the explosion-proof area in a circumferential direction, and the number of turns N of the planar spiral ranges from 1 to 2.

[0008] As an optional technical solution of the battery top cover, the diameter of the cover body is 46mm, and the diameter of any point on the planar spiral ranges from 22mm to 30mm.

[0009] As an optional technical solution of the battery top cover, along the radial direction of the planar spiral, the distance between the starting point of the planar spiral and the ending point of the planar spiral is B, and 2mm≤B<9mm, and the burst value of the explosion-proof mark is lower than 1.5mpa±0.2mpa.

[0010] As an optional technical scheme of the battery top cover, the starting point diameter size of the planar spiral is not less than 22mm, the ending point diameter size of the planar spiral is not less than 28mm, the blasting value of the anti-explosion notch is lower than 1.5mpa±0.2mpa, and the residual thickness value of the anti-explosion notch is not less than 0.07mm.

[0011] As an optional technical scheme of the battery top cover, the anti-explosion notch is a stepped groove, the stepped groove comprises a first groove and a second groove arranged along the thickness direction of the cover body, the groove width of the first groove is greater than the groove width of the second groove, and the groove opening of the second groove is communicated with the groove bottom of the first groove.

[0012] As an optional technical scheme of the battery top cover, the cross-sectional shape of the first groove and the second groove is inverted trapezoidal, the groove bottom width size of the second groove is not less than 0.15mm, and the groove opening width size of the first groove is not less than 0.89mm.

[0013] As an optional technical scheme of the battery top cover, the groove bottom of the second groove is arc-shaped, and the arc-shaped protrudes towards the direction of the battery cell.

[0014] The second object of the utility model is to provide a battery shell which can meet the demand of low blasting value of battery monomer.

[0015] In order to achieve the object, the utility model adopts the following technical scheme:

[0016] The battery shell comprises a shell body and the above-mentioned battery top cover, and the cover body is arranged at the opening of the shell body.

[0017] As an optional technical scheme of the battery shell, the cover body and the shell body are integrally formed.

[0018] The third object of the utility model is to provide a battery monomer which can meet the demand of low blasting value.

[0019] In order to achieve the object, the utility model adopts the following technical scheme:

[0020] The battery monomer comprises a battery cell and the above-mentioned battery shell, and the battery cell is located in the battery shell.

[0021] The utility model has the beneficial effects of:

[0022] The battery top cover provided by the utility model discloses a cover body, is equipped with the explosion -proof area on the cover body, is equipped with the explosion -proof notch in the explosion -proof area, when the pressure in the battery is abnormally high, can release the pressure through the explosion -proof notch in the explosion -proof area, and then prevent the battery from exploding and other safety accidents.The explosion -proof notch is in plane spiral line, the plane spiral line extends along the inside circumference of the explosion -proof area, and the number of turns N is greater than 1 and less than 2, compared with the O-shaped line notch and the C-shaped line notch in the prior art, the explosion -proof notch of the plane spiral line of the battery top cover surrounds a large area, so that the bursting value of the battery top cover is low, and the number of turns of the plane spiral is less than 2, so that the explosion -proof notch is simple to process, and the influence of deformation in the stamping forming process on the bursting value can be reduced, so that the battery top cover can meet the demand of low bursting value of the battery monomer with high-strength battery shell. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the first structure schematic view of the battery top cover provided by the utility model embodiment;

[0024] Figure 2 It is the second structure schematic view of the battery top cover provided by the utility model embodiment;

[0025] Figure 3 It is Figure 2 The sectional view at A-A;

[0026] Figure 4 It is Figure 3 The enlarged view at D.

[0027] In the drawing:

[0028] 100, cover body;110, explosion -proof area;111, explosion -proof notch. DETAILED DESCRIPTION

[0029] The utility model will be further explained in detail 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 limited to the utility model.In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawing, not all structures.

[0030] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated;It can be mechanical connection, or electrical connection;It can be directly connected, or indirectly connected through an intermediate medium, it can be the communication inside two elements or the interaction relationship 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.

[0031] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the non-direct contact between the first and second features but through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0032] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0033] The present utility model provides a battery top cover, which can meet the requirement of a battery cell with a high-strength battery case for a low burst value.

[0034] Specifically, as Figures 1 to 4 shown, the battery top cover includes a cover body 100. An explosion-proof area 110 is provided on the cover body 100. An explosion-proof notch 111 is provided in the explosion-proof area 110. The explosion-proof notch 111 is arranged in a planar spiral. The planar spiral extends along the inner circumference of the explosion-proof area 110. And the numerical range of the number of turns N of the planar spiral is: 1 < N < 2. Exemplarily, the numerical value of N is 1.1, 1.2, 1.3 or 1.5, etc.

[0035] Based on the above design, an explosion-proof notch 111 is provided in the explosion-proof area 110 on the cover body 100. When the internal pressure of the battery rises abnormally, the pressure can be released by the rupture at the explosion-proof notch 111 in the explosion-proof area 110, thereby preventing safety accidents such as battery explosion. The explosion-proof notch 111 is arranged in a planar spiral, and the numerical value of the number of turns N is greater than 1 and less than 2. Compared with the O-shaped line notch and C-shaped line notch in the prior art, the area surrounded by the planar spiral-shaped explosion-proof notch of this battery top cover is large, so that the burst value of this battery top cover is lower; and the number of turns of the planar spiral is less than 2, which makes the processing of the explosion-proof notch 111 simple and can reduce the influence of deformation during the stamping process on the burst value. Finally, this battery top cover can meet the requirement of a battery cell with a high-strength battery case for a low burst value.

[0036] It should be noted that the comparison of the explosion value of the planar spiral-shaped anti-explosion notch 111 with the O-shaped line notch and the C-shaped line notch in the prior art is under the condition that the cover body 100 is made of the same material. The line notch processing technology of the O-shaped line notch, the C-shaped line notch and the planar spiral-shaped anti-explosion notch 111 of the utility model is the prior art, which will not be described in detail here. In this embodiment, the cover body 100 is made of pre-plated nickel steel material. The pre-plated nickel steel material is a metal material with a layer of nickel plated on the surface of the steel material, which belongs to the prior art and will not be described in detail here.

[0037] The anti-explosion area 110 is a boss formed by stamping the cover body 100 away from the direction of the battery cell, and the anti-explosion notch 111 is located on the boss.

[0038] Optionally, when the diameter of the cover body 100 is 46mm, the diameter of any point on the planar spiral is in the range of 22mm-30mm. Exemplarily, the diameter of any point on the planar spiral can be 22mm, 24mm, 26mm, 29mm or 30, etc. The anti-explosion notch 111 of the battery top cover in this embodiment is suitable for 46 series cylindrical large battery, which is a new type of cylindrical lithium battery with a diameter of 46mm and a height of 80mm to 120mm. It has broad prospects in the field of electric vehicles and energy storage due to its high energy density, low cost and safety. The 46 series cylindrical large battery belongs to the prior art and will not be described in detail here.

[0039] Further, along the radial direction of the planar spiral, the distance between the starting point of the planar spiral and the ending point of the planar spiral (i.e. the spacing between the first and second circles of the planar spiral) is B, and 2mm≤B<9mm, and the explosion value of the anti-explosion notch 111 is lower than 1.5mpa±0.2mpa.

[0040] Exemplarily, B can be 2mm, 3mm, 4mm, 7mm or 8mm, etc. In this embodiment, B is 2.24mm.

[0041] Specifically, for the cover body 100 made of pre-plated nickel steel material with a diameter of 46mm, the O-shaped line notch and the C-shaped line notch (with a diameter greater than or equal to 24mm) can only meet the requirement of explosion value 2.0±0.5mpa. While the planar spiral-shaped anti-explosion notch 111 of the battery top cover can meet the requirement of explosion value of the anti-explosion notch 111 lower than 1.5mpa±0.2mpa.

[0042] Further, the diameter size of the starting point of the planar spiral is not less than 22 mm, and exemplarily can be 22 mm, 23 mm, or 24 mm, etc.; the diameter size of the ending point of the planar spiral is not less than 28 mm, and exemplarily can be 28 mm, 29 mm, or 30 mm, etc.; the blasting value of the explosion-proof notch 111 is lower than 1.5 mpa±0.2 mpa; and the residual thickness value of the explosion-proof notch 111 is not less than 0.07 mm, and exemplarily can be 0.07 mm, 0.075 mm, or 0.08 mm, etc. That is, the planar spiral-shaped explosion-proof notch 111 of the battery top cover can meet the requirements of the blasting value of the explosion-proof notch 111 being lower than 1.5 mpa±0.2 mpa and the residual thickness value of the explosion-proof notch 111 being not less than 0.07 mm (higher than the minimum safety value 0.06 mm).

[0043] In the embodiment, the diameter size of the starting point of the planar spiral is 22.11 mm, the diameter size of the ending point of the planar spiral is 28.89 mm, and the distance L between the starting point of the planar spiral and the ending point of the planar spiral along the radial direction perpendicular to the planar spiral is 9.35 mm.

[0044] Continuing as shown in Figure 4 The explosion-proof notch 111 of the battery top cover is a stepped groove, which includes a first groove and a second groove arranged along the thickness direction of the cover body 100, the groove width of the first groove is greater than that of the second groove, and the groove opening of the second groove is in communication with the groove bottom of the first groove. The explosion-proof notch 111 in the shape of a stepped groove is beneficial to battery blasting tearing and also facilitates the processing of the explosion-proof notch 111.

[0045] Optionally, the cross-sectional shape of the first groove and the second groove is all inverted trapezoidal, and the width size of the groove bottom of the second groove is not less than 0.15 mm, and exemplarily can be 0.15 mm, 0.17 mm, or 2 mm, etc.; the width size of the groove opening of the first groove is not less than 0.89 mm, and exemplarily can be 0.89 mm, 0.9 mm, or 0.92 mm, etc.

[0046] In the embodiment, the width size of the groove bottom of the second groove is 0.15 mm, and the width size of the groove opening of the first groove is 0.89 mm.

[0047] Optionally, the groove bottom of the second groove is arc-shaped, which protrudes towards the direction of the battery cell.

[0048] The embodiment also provides a battery shell which can meet the demand of low blasting value of the battery monomer.

[0049] Specifically, the battery shell includes a shell body and the above-mentioned battery top cover, and the cover body 100 is arranged at the opening of the shell body. Since the above-mentioned battery top cover can meet the low blasting value, the battery shell can meet the demand of low blasting value.

[0050] Optionally, the cover body 100 is integrally formed with the shell body.

[0051] In the embodiment, the battery shell is a cylindrical steel shell.

[0052] It should be noted that the battery top cover further comprises a pole, and the pole is arranged in a mounting hole of the cover body 100, and the mounting hole is located at the center of the cover body 100.

[0053] In the embodiment, the pole is connected with the battery cell through the mounting hole of the cylindrical steel shell. The mounting mode of the pole and the connection mode with the battery cell are both prior art, and will not be described here.

[0054] The embodiment further provides a battery monomer which can meet the demand of low burst value.

[0055] Specifically, the battery monomer comprises the battery cell and the battery shell, and the battery cell is located in the battery shell. Since the battery shell has low burst value, the battery monomer can meet the demand of low burst value.

[0056] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation of the embodiments of the utility model. For the ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be made without departing from the protection scope of the utility model. Here, it is not necessary and impossible to enumerate all the embodiments. 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 characterized by, The battery top cover comprises a cover body (100), the cover body (100) is provided with an explosion-proof area (110), the explosion-proof area (110) is provided with an explosion-proof notch (111), the explosion-proof notch (111) is arranged in a planar spiral, the planar spiral extends along the inner side of the explosion-proof area (110) in a circumferential direction, and the number of turns N of the planar spiral ranges from 1 to 2.

2. The battery header of claim 1, wherein, The diameter of the cover body (100) is 46 mm, and the diameter of any point on the planar spiral ranges from 22 mm to 30 mm.

3. The battery header of claim 2, wherein, In the radial direction of the planar spiral, the distance between the starting point of the planar spiral and the ending point of the planar spiral is B, and 2 mm≤B<9 mm, and the blasting value of the explosion-proof notch (111) is lower than 1.5mpa±0.2mpa.

4. The battery header of claim 3, wherein, The diameter of the starting point of the planar spiral is not less than 22 mm, the diameter of the ending point of the planar spiral is not less than 28 mm, the blasting value of the explosion-proof notch (111) is lower than 1.5mpa±0.2mpa, and the residual thickness value of the explosion-proof notch (111) is not less than 0.07 mm.

5. The battery header of claim 4, wherein, The explosion-proof notch (111) is a stepped groove, the stepped groove comprises a first groove and a second groove arranged in the thickness direction of the cover body (100), the groove width of the first groove is greater than the groove width of the second groove, and the groove opening of the second groove is in communication with the groove bottom of the first groove.

6. The battery header of claim 5, wherein, The cross-sectional shape of the first groove and the second groove is an inverted trapezoid, the groove bottom width of the second groove is not less than 0.15 mm, and the groove opening width of the first groove is not less than 0.89 mm.

7. The battery cover of claim 5, wherein the cover includes a plurality of tabs extending from the cover, the tabs being configured to be received within the plurality of slots of the battery cover. The groove bottom of the second groove is arc-shaped, and the arc-shaped protrudes towards the direction of the battery cell.

8. A battery housing, characterized by The battery shell comprises a shell body and the battery top cover of any one of claims 1-7, and the cover body (100) is arranged on the opening of the shell body.

9. The battery case of claim 8, wherein, The cover body (100) and the shell body are integrally formed.

10. A battery cell, characterized by The battery monomer comprises a battery cell and the battery shell of claim 8 or claim 9, and the battery cell is located in the battery shell.

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