Battery

Abstract

The utility model relates to the technical field of electric power elements, and discloses a battery which comprises a shell and a cover plate, an inner cavity is arranged in the shell, the inner cavity penetrates through the end part of the shell to form an end part opening, the inner cavity penetrates through the top of the shell to form a top opening, and the cover plate is connected to the shell to cover the top opening and the end part opening; a battery cell and a connecting sheet are arranged in the inner cavity, the battery cell is provided with a tab, and a pole is arranged on the cover plate; the connecting sheet comprises a body section, and a pole column section and a tab section which are fixedly arranged on the body section; the pole section is connected with the pole, the tab section is connected with the tab, and the tab section and the body section are arranged in a non-coplanar manner; the closed inner cavity is defined by the cover plate and the shell, the structure is simple, and forming and manufacturing are convenient; the connecting piece can be bent, so that the connecting piece can be electrically connected with the pole and the tab conveniently, the internal resistance of the battery can be reduced, the connecting piece can be arranged conveniently, the connecting piece is simple in manufacturing process and high in functionality and universality, the assembling difficulty of the battery is greatly simplified, and the assembling efficiency of the battery is improved.

Description

Technical Field

[0001] The utility model patent relates to the technical field of power components, and more specifically, to batteries. Background Art

[0002] For current batteries, the housing is generally made by bending and welding aluminum. During the manufacturing process, it is necessary to go through blanking and multiple bends, and then welded into a housing. There needs to be an extra welding reserved position. After welding is completed, this part of the welding reserved position needs to be cut off. The processes are numerous and complex, and the material utilization rate is not high, making it impossible to achieve relatively efficient continuous production.

[0003] Alternatively, the housing can also be roll-formed. Among them, high-frequency welding is used, and multiple rows of rollers cooperate with each other to gradually make the coiled material into a housing, and then through high-frequency welding, and finally rotary cutting to form. The manufacturing cost investment is high, and it is difficult to automatically remove the burrs at the mouth of the housing.

[0004] In addition, inside the battery, connecting pieces are used to connect the pole posts and the battery cells. However, during the connection process of the current connecting pieces, there are defects such as large difficulty in assembling the battery and low assembling efficiency. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a battery, aiming to solve the problem of low battery assembly efficiency in the prior art.

[0006] The utility model is implemented as follows. The battery includes a housing and a cover plate. The housing has an inner cavity, and the inner cavity penetrates through the end of the housing to form an end opening, and the inner cavity penetrates through the top of the housing to form a top opening. The cover plate is connected to the housing to seal the top opening and the end opening.

[0007] An electric core and a connecting piece are arranged in the inner cavity. The electric core has pole ears, and pole posts are arranged on the cover plate. The connecting piece includes a body section, a pole post section and a pole ear section fixed on the body section. The pole post section is used to connect the pole posts, the pole ear section is used to connect the pole ears, and the pole ear section is arranged non-coplanar with the body section.

[0008] Further, the pole ear section and the body section are arranged in an overlapping manner, and the pole ear section is located between the electric core and the body section.

[0009] Further, the pole ears are arranged corresponding to the top opening, and the pole posts are arranged corresponding to the end opening.

[0010] Further, a film piece is covered on the connecting piece, and the connecting piece is insulated from the cover plate through the film piece.

[0011] Further, a blasting area is provided on the cover plate, and an explosion-proof film is provided in the blasting area. A partition is provided in the inner cavity, and the partition is arranged between the explosion-proof film and the battery cell.

[0012] Further, through holes communicating the explosion-proof film and the battery cell are provided in the partition.

[0013] Further, an insulating film sleeve is sleeved on the periphery of the battery cell, and the insulating film sleeve is fixedly connected to the partition; a bottom support plate is provided on the insulating film sleeve, and the bottom support plate abuts against the periphery of the battery cell.

[0014] Further, the cover plate includes a top plate and two side plates. The two side plates are butted at the two ends of the top plate and are arranged in a bent manner with the top plate. The two side plates are arranged at intervals relative to each other; the two side plates seal the end opening of the housing, and the top plate seals the top opening of the housing.

[0015] Further, the housing includes a bottom plate and two side plates. The bottoms of the two side plates are respectively butted against the sides of the bottom plate, and the bottom plate and the two side plates enclose to form the inner cavity;

[0016] An end opening is formed between the ends of the two side plates, and a top opening is formed between the tops of the two side plates; the top plate is connected to the tops of the two side plates, and the side plates are respectively connected to the ends of the two side plates and the ends of the bottom plate.

[0017] Further, two pole posts are provided on the cover plate, and the two pole posts are arranged on the side plates.

[0018] Compared with the prior art, for the battery provided by the present utility model, the cover plate is connected to the housing and encloses with the housing to form a closed inner cavity. The structure is simple and convenient for forming and manufacturing; the connecting piece can be bent, which is convenient for its connection with the pole post and the pole ear. At the same time, it is beneficial to reduce the internal resistance of the battery and facilitate the arrangement of the connecting piece. The manufacturing process of the connecting piece is simple, and its functionality and versatility are strong, which greatly simplifies the assembly difficulty of the battery and improves the assembly efficiency of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional schematic diagram of the battery provided by the present utility model;

[0020] Figure 2 is a partial three-dimensional schematic diagram of the battery provided by the present utility model;

[0021] Figure 3 is an internal three-dimensional schematic diagram of the battery provided by the present utility model;

[0022] Figure 4 is Figure 3Enlarged schematic view of part A in

[0023] Figure 5 is a cutaway three-dimensional schematic view of the battery provided by the present utility model;

[0024] Figure 6 is Figure 5 Enlarged schematic view of part B in

[0025] In the figure, there are cover plate 100, top plate 101, side plate 102, explosion-proof sheet 103, liquid injection port 104, pole column 105, and pole block 106; housing 200, housing side plate 201, housing bottom plate 202; separator 300, through hole 301; battery cell 400, tab 401; connecting piece 500, pole column section 501, tab section 502, and body section 503. Detailed implementation manners

[0026] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model, and are not used to limit the present utility model.

[0027] The implementation of the present utility model will be described in detail below with reference to specific embodiments.

[0028] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and cannot be understood as limitations on this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] Referring to Figures 1-6 shown, it is a preferred embodiment provided by the present utility model.

[0030] The battery provided in this embodiment can be a blade battery or other types of batteries, and is not limited to a specific type of battery.

[0031] The battery includes a housing 200 and a cover plate 100. The housing 200 has an inner cavity, the inner cavity penetrates through the end of the housing 200 to form an end opening, the inner cavity penetrates through the top of the housing 200 to form a top opening, and the cover plate 100 is connected to the housing 200 and seals the top opening and the end opening.

[0032] The top opening and the two end openings on the housing 200 are arranged in a U-shaped layout, and the shape of the cover plate 100 is also arranged in a U-shaped layout. In this way, when the cover plate 100 is connected to the housing 200, the cover plate 100 can cover the top opening and the two end openings.

[0033] The inner cavity is provided with a battery cell 400 and a connecting piece 500. The battery cell 400 has a tab 401. The cover plate 100 is provided with a terminal 105. The terminal 105 is electrically connected to a terminal block 106, and an electrical device is welded to the terminal block 106 and is electrically connected to the terminal block 106.

[0034] The connecting piece 500 includes a body section 503, a terminal section 501 and a tab section 502 fixed on the body section 503. The terminal section 501 is used to connect the terminal 105, and the tab section 502 is used to connect the tab 401. The tab section 502 and the body section 503 are arranged non-coplanarly. The non-coplanar arrangement form can be diversified. For example, the tab section 502 and the body section 503 are arranged in a stacked manner, or they can be arranged at a relative angle, or they can also be any other non-coplanar arrangement form.

[0035] For the battery provided above, the cover plate 100 is connected to the housing 200 and encloses a closed inner cavity with the housing 200. The structure is simple and convenient for molding and manufacturing; the connecting piece 500 can be bent, which is convenient for its connection with the terminal 105 and the tab 401. At the same time, it is beneficial to reduce the internal resistance of the battery and facilitate the arrangement of the connecting piece 500. The manufacturing process of the connecting piece 500 is simple, and its functionality and versatility are strong, which greatly simplifies the assembly difficulty of the battery and improves the assembly efficiency of the battery.

[0036] The cover plate 100 and the housing 200 of the battery can be made of stainless steel material. The thickness of the housing 200 can reach 0.015 mm or more, and the strength of stainless steel is nearly 3 times that of aluminum.

[0037] In some embodiments, the tab section 502 and the body section 503 are arranged in a superimposed state, and the tab section 502 is located between the battery cell 400 and the body section 503. In this way, it is convenient for the tab section 502 to be connected to the tab 401 of the battery cell 400, and it is also convenient for the arrangement of the tab section 502, improving the versatility and functionality of the connecting piece 500, and the structure is relatively compact, which is beneficial to reducing the internal space.

[0038] The tab 401 is arranged corresponding to the top opening, and the terminal 105 is arranged corresponding to the end opening. In this way, the tab 401 and the terminal 105 are arranged on different sides, which is convenient for the arrangement of the tab 401 and the terminal 105. Secondly, when the connecting piece 500 is respectively connected to the battery cell 400 and the terminal 105, the terminal section 501 and the body section 503 are bent, that is, the terminal section 501 and the body section 503 are arranged at an angle.

[0039] A film piece with insulation function is covered on the connecting piece 500. The connecting piece 500 is insulated from the cover plate 100 through the film piece, and the film piece is made of a material that is insulating and resistant to electrolyte corrosion.

[0040] In some embodiments, a blasting area is provided on the cover plate 100. The blasting area has an explosion-proof film 103, and a partition plate 300 is provided in the inner cavity. The partition plate 300 is arranged between the explosion-proof film 103 and the battery cell 400. The explosion-proof film 103 can be integrally formed with the cover plate 100 or can be separately formed and then welded to the cover plate 100.

[0041] When the internal pressure in the inner cavity of the battery exceeds the set pressure, under the action of the internal pressure, the explosion-proof film 103 is blasted, so that the gas in the inner cavity leaks out, reducing the internal pressure in the inner cavity and preventing the battery from exploding.

[0042] By arranging the partition plate 300, the inside of the battery cell 400 can play a supporting role, preventing the battery cell 400 from shaking during use, and providing excellent conditions for the accurate blasting of the explosion-proof film 103. Forming a channel facilitates the smooth discharge of the gas in the inner cavity.

[0043] The partition plate 300 can play a supporting role, preventing the battery cell 400 from shaking, and can also form a precise blasting channel for the explosion-proof film 103, facilitating the smooth discharge of the gas.

[0044] In some embodiments, a through hole 301 communicating the explosion-proof film 103 and the battery cell 400 is provided in the partition plate 300. The explosion-proof film 103 and the battery cell 400 are communicated through the through hole. In this way, when an abnormality occurs in the battery cell 400, the gas in the inner cavity acts on the explosion-proof film 103 in the explosion-proof area through the through hole 301. When the internal pressure in the inner cavity exceeds the set pressure, the accurate blasting of the explosion-proof film 103 can be realized, providing a precise channel for the accurate blasting of the explosion-proof film 103.

[0045] In some embodiments, an insulating film sleeve is sleeved on the periphery of the battery cell 400. The insulating film sleeve is fixedly connected to the partition plate 300. The partition plate 300 can be fixedly connected to the insulating film sleeve through welding. In this way, the partition plate 300 can play a supporting role and prevent the battery cell 400 from shaking.

[0046] A bottom support plate is provided on the insulating film sleeve. The bottom support plate abuts against the periphery of the battery cell 400. In this way, the bottom support plate can be restricted on the periphery of the battery cell 400, maintaining the structural stability of the battery cell 400 and facilitating the assembly of the battery cell 400 in the inner cavity.

[0047] In some embodiments, the cover plate 100 includes a top plate 101 and two side plates 102. The side plates 102 are butted against the ends of the top plate 101 and are arranged bent relative to the top plate 101, and the two side plates 102 are arranged at a relative interval; the two side plates 102 respectively seal the end openings of the housing 200, and the top plate 101 seals the top opening of the housing 200.

[0048] The cover plate 100 can be integrally formed or separately manufactured and formed. The top plate 101 and the side plates 102 can be directly bent or segmented, and then fixed by welding.

[0049] In some embodiments, the housing 200 includes a bottom plate 202 and two side plates 201. The bottoms of the two side plates 201 are respectively butted against the sides of the bottom plate 202, and the bottom plate 202 and the two side plates 201 enclose the above-mentioned inner cavity;

[0050] The above-mentioned end openings are formed between the ends of the two side plates 201, and the above-mentioned top openings are formed between the tops of the two side plates 201; the top plate 101 is connected to the tops of the two side plates 201, and the side plates 102 are respectively connected to the ends of the two side plates 201 and the ends of the bottom plate 202.

[0051] The housing 200 can be integrally formed or separately manufactured. The bottom plate 202 and the side plates 201 can be directly bent or fixed to be integrated by welding the bottom plate 202 and the side plates 201.

[0052] There are various forming methods for the cover plate 100 and the housing 200, which can be specifically determined according to actual manufacturing needs, not limited to specific manufacturing methods. For example, it can be integrally formed and bent, or separately manufactured and then welded and fixed into one body, etc.

[0053] In some embodiments, two of the above-mentioned pole columns 105 are provided on the cover plate 100, and the two pole columns 105 are respectively arranged on the two side plates 102. The two pole columns 105 are respectively a positive pole column 105 and a negative pole column 105. The two pole columns 105 can be arranged on the same side, that is, arranged on the same side plate 102, or on different sides, that is, respectively arranged on the two side plates 102. Of course, the two pole columns 105 can also be arranged on the top plate 101.

[0054] A liquid injection port 104 is provided on the cover plate 100 so that battery liquid can be injected into the inner cavity through the liquid injection port 104. Among them, the explosion-proof sheet 103 and the liquid injection port 104 can be arranged on the same side as the pole column 105. Of course, they can also be arranged on different sides from the pole column 105.

[0055] In some embodiments, the battery assembly method is generally as follows:

[0056] Weld the pole column section 501 of the connecting piece 500 to the pole column 105 on the cover plate 100. Then, after welding the tab section 502 on the connecting piece 500 to the tab 401 of the battery cell 400, bend the tab section 502 relative to the connecting piece 500 and tuck it between the connecting piece 500 and the battery cell 400.

[0057] After the connecting piece 500 is connected and arranged, stick a film patch on the connecting piece 500. Then, sleeved an insulating film sleeve on the periphery of the battery cell 400, perform ultrasonic welding on the insulating film sleeve and the separator 300. And, a bottom support plate is adhered to the bottom of the insulating film sleeve. Finally, the arranged battery cell 400 is integrally installed in the inner cavity of the housing 200, and then the housing 200 and the cover plate 100 are sealed and welded.

[0058] In some embodiments, the assembly method of the cover plate 100 is as follows:

[0059] Weld the explosion-proof sheet 103 on the explosion-proof area of the cover plate 100, or directly form an explosion-proof area on the cover plate 100. After the pole column 105 passes through the lower plastic part, then sleeve a sealing ring, and then assemble a plastic part and a pole block 106 on the pole column 105. Finally, perform riveting and welding on the pole column 105 to fix the pole column 105 on the cover plate 100.

[0060] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery, characterized in that, It includes a housing (200) and a cover plate (100). The housing (200) has an inner cavity. The inner cavity penetrates through the end of the housing (200) to form an end opening, and the inner cavity penetrates through the top of the housing (200) to form a top opening. The cover plate (100) is connected to the housing (200) to seal the top opening and the end opening. An electric core (400) and a connecting piece (500) are arranged in the inner cavity. The electric core (400) has pole tabs (401), and pole posts (105) are arranged on the cover plate (100). The connecting piece (500) includes a body section (503), a pole post section (501) and a pole tab section (502) fixedly arranged on the body section (503). The pole post section (501) is used to connect the pole posts (105), the pole tab section (502) is used to connect the pole tabs (401), and the pole tab section (502) is arranged non-coplanarly with the body section (503).

2. The battery according to claim 1, wherein The pole tab section (502) and the body section (503) are arranged in an overlapping manner, and the pole tab section (502) is located between the electric core (400) and the body section (503).

3. The battery according to claim 1, characterized in that, The pole tabs (401) are arranged corresponding to the top opening, and the pole posts (105) are arranged corresponding to the end opening.

4. The battery according to claim 1, characterized in that, A film piece is covered on the connecting piece (500), and the connecting piece (500) is insulated from the cover plate (100) through the film piece.

5. The battery according to claim 1, wherein, A blasting area is arranged on the cover plate (100), and an explosion-proof piece (103) is arranged in the blasting area. A partition plate (300) is arranged in the inner cavity, and the partition plate (300) is arranged between the explosion-proof piece (103) and the electric core (400).

6. The battery according to claim 5, characterized in that, A through hole (301) communicating the explosion-proof piece (103) and the electric core (400) is arranged in the partition plate (300).

7. The battery according to claim 5, characterized in that, An insulating film sleeve is sleeved on the periphery of the electric core (400), and the insulating film sleeve is fixedly connected to the partition plate (300). A bottom support plate is arranged on the insulating film sleeve, and the bottom support plate abuts against the periphery of the electric core (400).

8. The battery according to any one of claims 1 to 7, characterized in that, The cover plate (100) includes a top plate (101) and two side plates (102). The two side plates (102) are butted at two ends of the top plate (101) and are bent with the top plate (101). The two side plates (102) are arranged at intervals relative to each other. The two side plates (102) seal the end opening of the housing (200), and the top plate (101) seals the top opening of the housing (200).

9. The battery according to claim 8, wherein The housing (200) includes a bottom plate (202) and two side plates (201). The bottoms of the two side plates (201) are respectively butted at the sides of the bottom plate (202), and the bottom plate (202) and the two side plates (201) enclose the inner cavity. The end opening is formed between the ends of the two side plates (201), and the top opening is formed between the tops of the two side plates (201). The top plate (101) is connected to the tops of the two side plates (201), and the side plates (102) are respectively connected to the ends of the two side plates (201) and the ends of the bottom plate (202).

10. The battery according to claim 8, characterized in that, Two of the pole columns (105) are provided on the cover plate (100), and the two pole columns (105) are arranged on the side plate (102).

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