Steel shell battery

Abstract

The utility model discloses a steel shell battery, which comprises a battery shell, a steel shell and a battery cover, the battery cell body is arranged in the accommodating cavity, an accommodating area with longitudinal fall is formed at one end of the battery cell body, and a tab is arranged on the accommodating area; the cover body is connected with the battery shell and is used for sealing the accommodating cavity; the polar column is fixedly connected to the cover body, one end of the polar column penetrates through the cover body, and the other end of the polar column is arranged on the accommodating area and is connected with the polar lug. According to the steel shell battery disclosed by the utility model, the effective space in the battery can be increased, the sealing performance is stronger, the battery capacity is higher, water is difficult to enter the battery to cause adverse reaction, the battery performance is more stable, the storage time is longer, the circulation time is longer, and the battery cruising ability is longer.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and particularly relates to a steel shell battery. Background Art

[0002] With the development of new energy technologies, steel shell batteries are widely used in energy storage and power. With the popularization of applications, steel shell batteries show great advantages in energy density due to their small size tolerance, thin thickness, no hemming, etc., and are a very promising development direction in the future.

[0003] Existing steel shell batteries have defects such as low internal space utilization rate of the battery, small battery capacity, and low battery life due to the inability to achieve thin batteries caused by the diameter of the positive electrode post. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the above defects in the prior art, and provide a steel shell battery that can improve the effective internal space of the battery, has stronger sealing performance, higher battery capacity, is difficult for moisture to enter the battery interior to cause adverse reactions, has more stable battery performance, longer storage time, longer cycle time, and longer battery life.

[0005] To achieve the above purpose, the utility model provides a steel shell battery, including:

[0006] A battery housing, on which a receiving cavity is provided;

[0007] A battery cell body installed in the receiving cavity, one end of the battery cell body forms a receiving area with a longitudinal drop, and a tab is provided on the receiving area;

[0008] A cover body, connected to the battery housing and sealing the receiving cavity;

[0009] A pole post fixed on the cover body, one end of the pole post passes through the cover body, and the other end of the pole post is placed on the receiving area and connected to the tab.

[0010] Further, the battery cell body includes a first battery cell and a second battery cell that are stacked and connected to each other, and the length of the first battery cell is less than the length of the second battery cell. By setting battery cells with different lengths to form a drop to constitute the receiving area of the utility model. Of course, the first battery cell and the second battery cell can also be integrally formed, and a receiving area with a drop is formed through a winding process.

[0011] Further, a through hole is opened on the cover body, and the position of the through hole corresponds to the position of the receiving area. By setting the through hole, the installation of the pole post can be better carried out.

[0012] Furthermore, the terminal post includes a convex portion and a connecting portion. The convex portion is inserted through the through hole, one side of the connecting portion is fixedly connected to the cover body, and the other side of the connecting portion is placed on the accommodating area and connected to the tab.

[0013] Furthermore, the battery case and the cover body are fixed by welding. Direct welding and fixing of the battery case and the cover body can make the connection between the two more stable and improve the sealing inside the battery case.

[0014] Furthermore, a first insulating member is provided between the cover body and the terminal post to insulate and connect the cover body and the terminal post. This makes the terminal post and the cover body insulated and separated to form different polarities.

[0015] Furthermore, a second insulating member is provided at the connection between the battery case and the cover body to insulate and connect the battery case and the cover body.

[0016] Furthermore, the battery cell body is a stacked cell or a wound cell.

[0017] Furthermore, a liquid injection hole is provided in the flank of the battery case, and an explosion-proof film is provided on the liquid injection hole. The liquid injection hole facilitates liquid injection, and the explosion-proof film can avoid the risk of leakage.

[0018] Furthermore, both the battery case and the cover body are stainless steel components.

[0019] Compared with the prior art, the present utility model has the following advantages: By forming an accommodating area with a longitudinal drop on the battery cell body, the terminal post can be installed on this accommodating area, which can greatly improve the utilization space inside the battery case, enable the design of a thin battery with a thickness of 3 mm or less, and expand the applicable range of the steel shell battery. Moreover, the steel shell battery of the present utility model not only has stronger sealing performance, higher battery capacity, but also is difficult for moisture to enter the battery interior to cause adverse reactions, and has the advantages of more stable battery performance, longer storage time, longer cycle time, and longer battery endurance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a schematic structural diagram of a steel shell battery according to Embodiment 1 of the present utility model;

[0022] Figure 2 is Figure 1Exploded view;

[0023] Figure 3 It is a schematic structural view of the battery cell body of the present utility model;

[0024] Figure 4 It is a schematic structural view of the cover body of the present utility model;

[0025] Figure 5 is Figure 4 The schematic A-A sectional view in

[0026] Figure 6 It is a schematic connection view of the battery housing and the cover body in Embodiment 2 of the present utility model.

[0027] In the figure, it includes:

[0028] 1. Battery housing; 11. Accommodating cavity; 12. Liquid injection hole; 13. Explosion-proof film; 2. Cover body; 21. Through hole; 3. Terminal post; 31. Protruding part; 32. Connecting part; 4. Battery cell body; 41. Accommodating area; 42. Tab; 421. Positive tab; 422. Negative tab; 43. First battery cell; 44. Second battery cell; 45. Fixing member; 6. First insulating member; 7. Second insulating member. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are one embodiment of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0030] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features.

[0032] Embodiment 1

[0033] Please refer to Figures 1 to 3, an embodiment of the present utility model provides a steel shell battery, including: a battery housing 1, a cover body 2, a pole column 3, and a battery cell body 4. The battery housing 1 and the cover body 2 in this embodiment are both stainless steel components directly formed by stamping stainless steel materials. The battery housing 1 and the cover body 2 made of stainless steel have the advantages of good rigidity, excellent electrical conductivity, and good anti-corrosion effect. As Figure 2 shown, the battery housing 1 is in a cuboid structure. An accommodation cavity 11 is provided on the battery housing 1, and each corner of the accommodation cavity 11 is set to a rounded corner. Similarly, the four corners of the battery cell body 4 are also set to a rounded corner structure, which can be adaptively installed during assembly. Moreover, the rounded corners can increase the contact area between the battery cell body 4 and the inner wall of the battery housing 1, better protecting the battery cell body 4 and making it not easily damaged when subjected to external forces; a liquid injection hole 12 is opened on the flank of the battery housing 1, and an explosion-proof sheet 13 is provided on the liquid injection hole 12. The liquid injection hole 12 is provided for convenient liquid injection, and the explosion-proof sheet 13 can avoid the risk of leakage.

[0034] The above-mentioned battery cell body 4 is installed in the accommodation cavity 11. As Figure 3 shown, a receiving area 41 with a longitudinal drop is formed at one end of the battery cell body 4. A tab 42 is provided on the receiving area 41. The tab 42 includes a positive tab 421 and a negative tab 422. Specifically, the battery cell body 4 includes a first battery cell 43 and a second battery cell 44 that are stacked and connected to each other. The length of the first battery cell 43 is less than the length of the second battery cell 44. Thus, when the first battery cell 43 is stacked on the second battery cell 44, one end of the two is aligned, and the other end forms a longitudinal drop, constituting the receiving area 41. Of course, the above-mentioned stacking setting is determined according to the structure of the battery cell body 4. For example, the battery cell body 4 can be a stacked cell or a wound cell. When the battery cell body 4 is a stacked cell, two battery cells with different lengths can be selected for stacking, and the tab 42 is led out as shown in the figure, and then the battery cell and the tab 42 are fixed with a fixing member 45; when the battery cell body 4 is a wound cell, the first battery cell 43 and the second battery cell 44 can be first folded and then stacked and connected, or an integrated battery cell body 4 can be used. When producing by winding, a part is reserved at the beginning, and a height difference is formed during the final forming.

[0035] As Figure 4 shown, the battery housing 1 and the cover body 2 are welded and fixed to seal the accommodation cavity 11. A through hole 21 is opened on the cover body 2, and the position of the through hole 21 corresponds to the position of the receiving area 41;

[0036] As Figure 4 and Figure 5As shown in the figure, the terminal post 3 is fixedly connected to the cover body 2. The terminal post 3 includes a convex portion 31 and a connecting portion 32. The convex portion 31 passes through the through hole 21 and passes through the cover body 2 to be electrically connected to an external component. The connecting portion 32 is arranged on the accommodating area 41 and connected to the tab 42. A first insulating member 6 is provided between the cover body 2 and the terminal post 3 to insulatively connect the cover body 2 and the terminal post 3. The first insulating member 6 is insulating glue. In this embodiment, the terminal post 3 is fixedly connected to the cover body 2 through insulating glue to achieve fixation and at the same time insulative connection. Particularly, in this embodiment, the terminal post 3 is a positive terminal post. Therefore, the terminal post 3 is connected to the positive tab 421, the negative tab 422 is connected to the battery case 1, and since the cover body 2 and the electromagnetic case are in a welded relationship, the battery case 1 and the cover body 2 are both negative electrodes in this embodiment.

[0037] Embodiment 2

[0038] The difference between this embodiment and Embodiment 1 is that, as Figure 6 shown in the figure, in this embodiment, a second insulating member 7 is provided at the connection between the battery case 1 and the cover body 2. The second insulating member 7 can be insulating glue, and the battery case 1 and the cover body 2 are insulatively connected and fixed through the insulating glue. The terminal post 3 and the cover body 2 are directly welded and fixed. Thus, when the terminal post 3 and the cover body 2 are positive electrodes in this embodiment, the battery case 1 is a negative electrode. Of course, it is also possible that the terminal post 3 and the cover body 2 are negative electrodes and the battery case 1 is a positive electrode, which can be adjusted according to actual situations. Others are the same as in Embodiment 1 and also achieve the technical effects of Embodiment 1.

[0039] By forming an accommodating area with a longitudinal drop on the battery cell body 4, the utility model can install the terminal post 3 on the accommodating area, which can greatly improve the utilization space inside the battery case 1, can realize the design of a thin battery with a thickness of 3 mm or less, improve the applicable range of the utility model, and the utility model not only has stronger sealing performance, higher battery capacity, but also it is difficult for moisture to enter the battery interior to cause adverse reactions, and has the advantages of more stable battery performance, longer storage time, longer cycle time, and longer battery endurance.

[0040] The above are only the preferred embodiments of the utility model and are not used to limit the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A steel shell battery, characterized in that: include: A battery housing (1), wherein a receiving cavity (11) is provided on the battery housing (1); A battery cell body (4) is installed in the accommodating cavity (11), one end of the battery cell body (4) forms an accommodating area (41) with a longitudinal drop, and a pole ear (42) is arranged on the accommodating area (41); A cover body (2) connected to the battery housing (1) and sealing the accommodating cavity (11); A pole (3) is fixedly connected to the cover body (2), one end of the pole (3) passes through the cover body (2), and the other end of the pole (3) is placed on the accommodating area (41) and connected to the pole ear (42).

2. The steel shell battery according to claim 1, characterized in that The battery cell body (4) comprises a first battery cell (43) and a second battery cell (44) which are connected to each other, and the length of the first battery cell (43) is shorter than the length of the second battery cell (44).

3. The steel shell battery according to claim 1, characterized in that A through hole (21) is provided on the cover body (2), and the position of the through hole (21) corresponds to the position of the accommodating area (41).

4. The steel shell battery according to claim 3, characterized in that: The pole (3) comprises a protruding portion (31) and a connecting portion (32), wherein the protruding portion (31) is connected to the through hole (21), one side of the connecting portion (32) is fixed to the cover body (2), and the other side of the connecting portion (32) is placed on the accommodating area (41) and connected to the pole lug (42).

5. The steel shell battery according to claim 4, characterized in that: The battery housing (1) and the cover body (2) are fixed by welding.

6. The steel shell battery according to claim 5, characterized in that: A first insulating member (6) is provided between the cover body (2) and the pole (3), so that the cover body (2) and the pole (3) are insulated and connected.

7. The steel shell battery according to claim 4, characterized in that: A second insulating member (7) is provided at the connection between the battery housing (1) and the cover body (2), so that the battery housing (1) and the cover body (2) are insulated and connected.

8. The steel shell battery according to any one of claims 1 to 7, characterized in that: The battery core body (4) is a stacked core or a wound core.

9. The steel shell battery according to claim 8, characterized in that: A liquid injection hole (12) is provided on the side wing of the battery housing (1), and an explosion-proof plate (13) is arranged on the liquid injection hole (12).

10. The steel shell battery according to claim 9, characterized in that: The battery casing (1) and the cover (2) are both made of stainless steel.

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