Battery shell and single battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery shell and a single battery. The battery shell comprises a shell body, a cover plate sheet and a pole, a first anti-explosion groove is formed in the side wall of the shell body, the first anti-explosion groove is formed in the side wall of the shell body and extends in the circumferential direction of the shell body, and the shell body is provided with an opening. The cover plate sheet is hermetically connected to the opening. And the pole penetrates through the cover plate sheet. When thermal runaway occurs in the battery, the air pressure in the battery is increased, and the first anti-explosion groove can be quickly broken under the action of the pressure so as to release the pressure in the battery, so that compared with a structure of welding an anti-explosion valve on the cover plate sheet, the anti-explosion effect of the battery shell can be ensured, the procedure of punching and producing the anti-explosion valve and the welding procedure are canceled, and the production cost is reduced. The production process of the explosion-proof structure of the battery shell is simplified, the yield of products is improved, the production efficiency is improved, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery shell and single battery. BACKGROUND

[0002] With the development of modern society and the enhancement of people's environmental protection consciousness, more and more equipment selects battery as power supply, such as mobile phone, notebook computer, electric tool and electric automobile etc., which provides broad space for the application and development of battery, and the use performance and safety requirement of battery is increasingly high. The battery shell is the key component of battery, which is directly related to the reliability, service life and capacity size of battery, and influences the production and use safety of producers and consumers.

[0003] Generally, the explosion-proof valve is arranged on the battery top cover, which can exhaust the inside of the shell under the thermal runaway state of the battery core, however, the manufacturing mode of arranging the explosion-proof valve on the battery top cover is mostly produced through the welding process, and the defective products are easy to produce, the structure production cost is larger, the product reliability is reduced, and the process steps are more, the production efficiency is reduced, and the production cost is increased.

[0004] Therefore, a battery shell and single battery are needed to solve the above problems. UTILITY MODEL CONTENT

[0005] One purpose of the utility model is to provide a battery shell, which can set the explosion-proof structure on the surface of the shell, ensure the explosion-proof effect of the battery, simplify the production process and reduce the production cost.

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

[0007] A battery shell is provided, which comprises:

[0008] A shell is provided with a first explosion-proof groove, which is arranged on the side wall of the shell and extends circumferentially along the shell, and the shell is provided with an opening.

[0009] A cover plate is connected to the opening.

[0010] A pole is arranged in the cover plate.

[0011] As an optional scheme of the battery shell, the first explosion-proof groove is arranged in a ring structure, and the first explosion-proof groove is arranged circumferentially around the shell.

[0012] As an optional scheme of the battery shell, the first explosion-proof groove is arranged in a wave shape.

[0013] As an optional solution of the battery shell, the inner diameter of the first explosion-proof groove gradually decreases from outside to inside.

[0014] As an optional solution of the battery shell, the first explosion-proof groove is arranged on the outer side of the shell body;

[0015] And / or, the first explosion-proof groove is arranged on the inner side of the shell body.

[0016] As an optional solution of the battery shell, the cover plate is provided with a second explosion-proof groove, the pole is arranged in the middle of the cover plate, and the second explosion-proof groove is arranged on the side of the pole.

[0017] As an optional solution of the battery shell, the second explosion-proof groove is in a ring structure, and the second explosion-proof groove surrounds the pole.

[0018] As an optional solution of the battery shell, the second explosion-proof groove comprises a first groove and a second groove, and the second groove is arranged on the bottom wall of the first groove.

[0019] As an optional solution of the battery shell, the battery shell comprises two cover plates, the shell body is provided with two openings, the two openings are respectively arranged at two ends of the shell body, and the two cover plates are respectively connected to the two openings.

[0020] Another purpose of the utility model is to provide a single battery, which has simple production process, low production cost and good safety performance.

[0021] To achieve the purpose, the utility model adopts the following technical scheme.

[0022] The utility model provides a single battery, which comprises a battery shell and a cell.

[0023] The utility model has the advantages of:

[0024] The utility model provides a battery shell, which comprises a shell body, a cover plate and a pole, a first explosion-proof groove is arranged on the shell body, the thickness of the shell body at the bottom of the first explosion-proof groove is reduced, when the battery is in thermal runaway, the internal pressure of the battery is increased, under the action of pressure, the first explosion-proof groove can be quickly broken to release the internal pressure of the battery, compared with the structure that an explosion-proof valve is welded on the cover plate, the stamping production process of the explosion-proof valve and the welding process can be cancelled while the explosion-proof effect of the battery shell is ensured, the production process of the explosion-proof structure of the battery shell is simplified, the qualified rate of products is improved, the production efficiency is improved, and the production cost is reduced.

[0025] The utility model also provides a single battery, including electric core and above-mentioned battery shell, this single battery has good safety performance, production process is simple, and the manufacturing cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the external structure schematic diagram of the single battery provided by the utility model,

[0027] Figure 2 It is the internal structure schematic diagram of the single battery provided by the utility model,

[0028] Figure 3 It is Figure 2 The enlarged view of A in figure,

[0029] Figure 4 It is Figure 2 The enlarged view of B in figure.

[0030] In the figure,

[0031] 100, shell, 110, first explosion-proof groove, 120, containing space,

[0032] 200, cover sheet, 210, second explosion-proof groove, 211, first recess, 212, second recess,

[0033] 300, pole, 310, external connection part, 320, internal connection part, 330, through part,

[0034] 400, sealing structure, 410, outer sealing element, 420, inner sealing element, 430, sealing ring. DETAILED DESCRIPTION

[0035] The utility model makes further detailed explanation in combination with the drawings and examples. It can be understood that the specific examples described here are only for explaining the utility model, and not for limiting 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 drawings, not all structures.

[0036] In the description of the utility model, unless another explicit provision and limitation, the term "link", "connect", "fix" should be broad sense understanding, for example, can be fixed connection, can be detachable connection, or be integrated, can be mechanical connection, can be electrical connection, can be directly connected, can be indirectly connected through intermediate medium, can be the intercommunication of two elements or the interaction of two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0037] In the utility model, unless another definite provision and limitation, first feature is "on" or "under" second feature, can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them. Moreover, first feature "on", "above" and "on" second feature includes that first feature is directly above and obliquely above second feature, or only indicates that first feature is higher than second feature in horizontal height. First feature "under", "below" and "under" second feature includes that first feature is directly below and obliquely below second feature, or only indicates that first feature is less than second feature in horizontal height.

[0038] In the description of the embodiment, the terms "upper", "lower", "right", "left", "horizontal", "vertical", and "radial" refer to the orientation or position relationship shown in the drawings, which is only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0039] As shown in Figures 1 to 4 The battery shell of the embodiment includes a shell 100, a cover plate 200 and a pole 300. A first explosion-proof groove 110 is arranged on the side wall of the shell 100. The first explosion-proof groove 110 is arranged on the side wall of the shell 100 and extends circumferentially along the shell 100. The shell 100 is provided with an opening. The cover plate 200 is connected to the opening. The pole 300 is arranged in the cover plate 200.

[0040] Based on the above design, the battery shell provided by the embodiment is provided with the first explosion-proof groove 110 on the shell 100, so that the thickness of the shell 100 at the bottom of the first explosion-proof groove 110 is reduced. When the battery is in thermal runaway, the internal pressure of the battery rises. Under the action of pressure, the first explosion-proof groove 110 can quickly break and release the internal pressure of the battery. Compared with the structure of welding an explosion-proof valve on the cover plate 200, the process of stamping the explosion-proof valve and the welding process of the explosion-proof valve are cancelled while ensuring the explosion-proof effect of the battery shell, which simplifies the production process of the explosion-proof structure of the battery shell, is conducive to improving the qualified rate of the product, improving the production efficiency and reducing the production cost.

[0041] It can be understood that in some embodiments, the first explosion-proof groove 110 can be arranged in an annular structure, and the first explosion-proof groove 110 is arranged circumferentially around the shell 100, so that the first explosion-proof groove 110 can quickly respond to the change of the air pressure inside the shell 100, and ensure the safety of the battery. In some other embodiments, the first explosion-proof groove 110 can also be arranged in an arc-shaped structure, which can improve the structural strength of the shell 100 while ensuring the explosion-proof performance of the first explosion-proof groove 110, and avoid damaging the shell 100 during assembly of the battery shell.

[0042] As a preferred, the first explosion-proof groove 110 can also be arranged in a wave-shaped structure, which can reduce the bending radius of the first explosion-proof groove 110, so that when the internal pressure of the battery is too large, the first explosion-proof groove 110 can quickly break, and the response speed of pressure relief is improved.

[0043] In the present embodiment, the cross section of the first explosion-proof groove 110 gradually decreases from outside to inside, which can prevent the reduction of the structural strength caused by the sudden change of the thickness of the side wall of the shell 100. Alternatively, the cross section of the first explosion-proof groove 110 can be arranged in a trapezoidal or semicircular shape, which is simple in structure and easy to process.

[0044] Further, the first explosion-proof groove 110 can be arranged on the outside of the shell 100, or the first explosion-proof groove 110 can be arranged on the inside of the shell 100, or the first explosion-proof groove 110 can be arranged on both the outside and the inside of the shell 100, so that the processing of the first explosion-proof groove 110 is more flexible, and the application range of the battery shell is improved.

[0045] Alternatively, the depth of the first explosion-proof groove 110 can be adjusted according to actual use requirements. When the safety pressure of the battery shell is larger, the thickness of the bottom wall of the first explosion-proof groove 110 is thicker, and the depth of the first explosion-proof groove 110 is smaller.

[0046] Further, the cover plate 200 can also be provided with a second explosion-proof groove 210, and the pole 300 is arranged in the middle of the cover plate 200, and the second explosion-proof groove 210 is located on the side of the pole 300. By arranging the second explosion-proof groove 210, the explosion-proof effect of the battery shell is further improved, and the safety of the battery shell is ensured.

[0047] Alternatively, the second explosion-proof groove 210 can be arranged in a strip-shaped groove, which can be arranged in a straight line or an arc line; the second explosion-proof groove 210 can also be arranged in an annular structure, and the second explosion-proof groove 210 is arranged around the pole 300, and the specific shape can be arranged according to actual requirements.

[0048] Specifically, the second explosion-proof groove 210 comprises a first groove 211 and a second groove 212, the second groove 212 is arranged on the bottom wall of the first groove 211, so that the second explosion-proof groove 210 is arranged in a segmented structure, the depth of the second explosion-proof groove 210 is reduced, and the thickness of the cover plate 200 is reduced, thereby reducing the weight of the battery shell.

[0049] Optionally, the cross-sectional shape of the first groove 211 and the second groove 212 is trapezoidal, and the depth of the first groove 211 and the second groove 212 can be adjusted adaptively according to the actual pressure resistance of the battery.

[0050] Further, the battery shell further comprises a sealing structure 400 arranged between the cover plate 200 and the pole 300. Specifically, the pole comprises an outer connecting portion 310, an inner connecting portion 320 and a penetrating portion 330, the outer connecting portion 310 abuts against one side of the cover plate 200 away from the battery shell, the inner connecting portion 320 abuts against one side of the cover plate 200 towards the inside of the battery shell, the penetrating portion 330 is connected between the outer connecting portion 310 and the inner connecting portion 320, and the penetrating portion 330 penetrates the cover plate 200. The sealing structure 400 comprises an outer sealing member 410, an inner sealing member 420 and a sealing ring 430, the outer sealing member 410 is arranged between the outer connecting portion 310 and the cover plate 200, the inner sealing member 420 is arranged between the inner connecting portion 320 and the cover plate 200, and the sealing ring 430 is arranged between the penetrating portion 330 and the cover plate 200, so as to ensure the insulation and sealing between the pole 300 and the cover plate 200.

[0051] Further, the battery shell comprises two cover plates 200, the shell 100 is provided with two openings, the two openings are respectively located at two ends of the shell 100, and the two cover plates 200 are respectively connected to the two openings, so as to ensure the use performance and safety of the battery.

[0052] The utility model further provides a single battery, including electric core and above-mentioned battery shell, shell 100 and cover plate 200 are closed and form containing space 120, electric core is arranged in containing space 120, and electric core is electrically connected with pole 300. The single battery sets up first explosion-proof groove 110 as explosion -proof structure on the lateral wall of shell 100, need not set up explosion -proof valve on cover plate 200, and production process is simple, and manufacturing cost is low, has good safety performance.

[0053] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and also impossible to exhaust all the implementation modes. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application claims.

Claims

1. A battery housing, characterized by The battery shell comprises a shell (100), a first explosion-proof groove (110) arranged on the shell (100), the first explosion-proof groove (110) being arranged on the side wall of the shell (100) and extending circumferentially along the shell (100), and an opening arranged on the shell (100). A cover plate (200) is connected to the opening. A pole (300) is arranged in the cover plate (200). The first explosion-proof groove (110) is arranged in a ring structure and surrounds the shell (100) circumferentially.

2. The battery case of claim 1, wherein, The first explosion-proof groove (110) is arranged in a wave structure.

3. The battery case of claim 1, wherein, The inner diameter of the first explosion-proof groove (110) gradually decreases from outside to inside.

4. The battery case of claim 1, wherein, The first explosion-proof groove (110) is arranged on the outer side of the shell (100).

5. The battery case of claim 1, wherein, And / or, the first explosion-proof groove (110) is arranged on the inner side of the shell (100). The cover plate (200) is provided with a second explosion-proof groove (210), the pole (300) is arranged in the middle of the cover plate (200), and the second explosion-proof groove (210) is located on the side of the pole (300).

6. The battery case of claim 1, wherein, The second explosion-proof groove (210) is arranged in a ring structure and surrounds the pole (300).

7. The battery case of claim 6, wherein, The second explosion-proof groove (210) comprises a first groove (211) and a second groove (212), and the second groove (212) is arranged on the bottom wall of the first groove (211).

8. The battery case of claim 6, wherein, The battery shell comprises two cover plates (200), and the shell (100) is provided with two openings, the two openings being respectively arranged at two ends of the shell (100), and the two cover plates (200) are respectively connected to the two openings.

9. The battery housing of any one of claims 1-8, wherein, The battery shell comprises a shell (100), a first explosion-proof groove (110) arranged on the shell (100), the first explosion-proof groove (110) being arranged on the side wall of the shell (100) and extending circumferentially along the shell (100), and an opening arranged on the shell (100).

10. A single cell characterized by, A cover plate (200) is connected to the opening. A pole (300) is arranged in the cover plate (200). The first explosion-proof groove (110) is arranged in a ring structure and surrounds the shell (100) circumferentially. The first explosion-proof groove (110) is arranged in a wave structure. The inner diameter of the first explosion-proof groove (110) gradually decreases from outside to inside. The first explosion-proof groove (110) is arranged on the outer side of the shell (100). And / or, the first explosion-proof groove (110) is arranged on the inner side of the shell (100). The cover plate (200) is provided with a second explosion-proof groove (210), the pole (300) is arranged in the middle of the cover plate (200), and the second explosion-proof groove (210) is located on the side of the pole (300). The second explosion-proof groove (210) is arranged in a ring structure and surrounds the pole (300). The second explosion-proof groove (210) comprises a first groove (211) and a second groove (212), and the second groove (212) is arranged on the bottom wall of the first groove (211). The battery shell comprises two cover plates (200), and the shell (100) is provided with two openings, the two openings being respectively arranged at two ends of the shell (100), and the two cover plates (200) are respectively connected to the two openings. The battery shell comprises a shell (100), a first explosion-proof groove (110) arranged on the shell (100), the first explosion-proof groove (110) being arranged on the side wall of the shell (100) and extending circumferentially along the shell (100), and an opening arranged on the shell (100). A cover plate (200) is connected to the opening. A pole (300) is arranged in the cover plate (200). The first explosion-proof groove (110) is arranged in a ring structure and surrounds the shell (100) circumferentially. The first explosion-proof groove (110) is arranged in a wave structure. The inner diameter of the first explosion-proof groove (110) gradually decreases from outside to inside. The first explosion-proof groove (110) is arranged on the outer side of the shell (100). And / or, the first explosion-proof groove (110) is arranged on the inner side of the shell (100). The cover plate (200) is provided with a second explosion-proof groove (210), the pole (300) is arranged in the middle of the cover plate (200), and the second explosion-proof groove (210) is located on the side of the pole (300). The second explosion-proof groove (210) is arranged in a ring structure and surrounds the pole (300). The second explosion-proof groove (210) comprises a first groove (211) and a second groove (212), and the second groove (212) is arranged on the bottom wall of the first groove (211). The battery shell comprises two cover plates (200), and the shell (100) is provided with two openings, the two openings being respectively arranged at two ends of the shell (100), and the two cover plates (200) are respectively connected to the two openings. The battery shell comprises a shell (100), a first explosion-proof groove (110) arranged on the shell (100), the first explosion-proof groove (110) being arranged on the side wall of the shell (100) and extending circumferentially along the shell (100), and an opening arranged on the shell (100). A cover plate (200) is connected to the opening. A pole (300) is arranged in the cover plate (200). The first explosion-proof groove (110) is arranged in a ring structure and surrounds the shell (100) circumferentially. The first explosion-proof groove (110) is arranged in a wave structure. The inner diameter of the first explosion-proof groove (110) gradually decreases from outside to inside. The first explosion-proof groove (110) is arranged on the outer side of the shell (100). And / or, the first explosion-proof groove (110) is arranged on the inner side of the shell (100). The cover plate (200) is provided with a second explosion-proof groove (210), the pole (300) is arranged in the middle of the cover plate (200), and the second explosion-proof groove (210) is located on the side of the pole (300). The second explosion-proof groove (210) is arranged in a ring structure and surrounds the pole (300). The second explosion-proof groove (210) comprises a first groove (211) and a second groove (212), and the second groove (212) is arranged on the bottom wall of the first groove (211). The battery shell comprises two cover plates (200), and the shell (100) is provided with two openings, the two openings being respectively arranged at two ends of the shell (100), and the two cover plates (200) are respectively connected to the two openings. The battery shell comprises a shell (100), a first explosion-proof groove (110) arranged on the shell (100), the first explosion-proof groove (110) being arranged on the side wall of the shell (100) and extending circumferentially along the shell (100), and an opening arranged on the shell (100). A cover plate (200) is connected to the opening. A pole (300) is arranged in the cover plate (200). The first explosion-proof groove (110) is arranged in a ring structure and surrounds the shell (100) circumferentially. The first explosion-proof groove (110) is arranged in a wave structure. The inner diameter of the first explosion-proof groove (110) gradually decreases from outside to inside. The first explosion-proof groove (110) is arranged on the outer side of the shell (100). And / or, the first explosion-proof groove (110) is arranged on the inner side of the shell (100). The cover plate (200) is provided with a second explosion-proof groove (210), the pole (300) is arranged in the middle of the cover plate (200), and the second explosion-proof groove (210) is located on the side of the pole (300). The second explosion-proof groove (210) is arranged in a ring structure and surrounds the pole (300). The second explosion-proof groove (210) comprises a first groove (211) and a second groove (212), and the second groove (212) is arranged on the bottom wall of the first groove (211). The battery shell comprises two cover plates (200), and the shell (100) is provided with two openings, the two openings being respectively arranged at two ends of the shell (100), and the two cover plates (200) are respectively connected to the two openings. The battery shell comprises a shell (100), a first explosion-proof groove (110) arranged on the shell (100), the first explosion-proof groove (110) being arranged on the side wall of the shell (100) and extending circumferentially along the shell (100), and an opening arranged on the shell (100). A cover plate (200) is connected to the opening. A pole (300) is arranged in the cover plate (200). The first explosion-proof groove (110) is arranged in a ring structure and surrounds the shell (100) circumferentially. The first explosion-proof groove (110) is arranged in a wave structure. The inner diameter of the first explosion-proof groove (110) gradually decreases from outside to inside. The first explosion-proof groove (110) is arranged on the outer side of the shell (100). And / or, the first explosion-proof groove (110) is arranged on the inner side of the shell (100). The cover plate (200) is provided with a second explosion-proof groove (210), the pole (300) is arranged in the middle of the cover plate (200), and the second explosion-proof groove

Images