Battery casing and battery

Abstract

The present invention relates to the technical field of batteries. Disclosed are a battery casing and a battery. The battery casing comprises a top cover assembly bent in a U shape and a casing body, wherein the top cover assembly covers the casing body in a sealing manner, and the top cover assembly and the casing body form a sealed inner cavity by means of enclosing. In the battery casing provided in the present invention, the top cover assembly is bent in a U shape, thereby facilitating the manufacturing and forming of the top cover assembly, and the top cover assembly can be directly formed by means of a bending process; and the top cover assembly can directly cover the casing body in a sealing manner, and the inner cavity is formed by means of the enclosure of the top cover assembly and the casing body, thereby greatly simplifying the structure of the casing body, and facilitating the manufacturing and forming of the casing body, wherein the structure of the battery casing is also simplified, thereby simplifying the manufacturing of the battery casing, and reducing the costs of a battery.

Description

Battery casing and battery Technical Field

[0001] This invention patent relates to the technical field of batteries, and more specifically, to battery casings and batteries. Background Technology

[0002] With the development of new energy technologies, various new energy devices are being used more and more widely in daily life. Electricity also belongs to the field of new energy, which is mainly reflected in batteries, such as electric vehicles, which use batteries as power output.

[0003] A battery consists of a battery casing and a battery cell. The battery cell is placed inside the battery casing, which has a closed inner cavity. The battery cell is placed inside the inner cavity. Technical issues

[0004] In the prior art, the battery casing includes a housing and a top cover assembly, which together form an inner cavity. However, the current battery casing structure is too complex, which leads to manufacturing complexity and increases the cost of the battery. Technical solutions

[0005] The purpose of this invention is to provide a battery casing that addresses the problem of complex manufacturing of battery casings in the prior art.

[0006] The present invention is implemented as follows: the battery casing includes a top cover assembly in the shape of a U-shape and a housing, wherein the top cover assembly covers the housing and forms a sealed inner cavity with the housing.

[0007] Furthermore, the shell is integrally molded.

[0008] Furthermore, along the length of the housing, the housing has wide side openings at both ends, a top opening at the top, and the top cover assembly covers the top opening and the two wide side openings.

[0009] Furthermore, the top cover assembly includes a top cover plate, with side plates formed at both ends of the top cover plate. The top cover plate and the side plates are integrally formed. The top cover plate covers the top opening, and the two side plates respectively cover the wide side opening.

[0010] Furthermore, the housing includes two rectangular panels arranged at intervals, a bottom plate between the bottoms of the two panels, a top opening between the tops of the two panels, and a wide side opening between the ends of the two panels along the length of the panels.

[0011] Furthermore, the top cover is connected to the top of the two panels respectively, the side panels are connected to the ends of the two panels respectively, and the bottom of the side panels is connected to the bottom plate.

[0012] Furthermore, the side plate is provided with an electrode post, and the top cover plate is provided with an explosion-proof sheet.

[0013] Furthermore, the side plate is provided with an explosion-proof sheet, and the top cover plate is provided with an electrode post. Beneficial effects

[0014] Compared with the prior art, the battery casing provided by the present invention has a U-shaped top cover assembly, which facilitates the manufacturing and forming of the top cover assembly. It can be directly formed by bending process, and the top cover assembly can be directly sealed on the casing. The inner cavity is formed by the enclosing between the top cover assembly and the casing, which greatly simplifies the structure of the casing and facilitates the manufacturing and forming of the casing. At the same time, it also simplifies the structure of the battery casing, simplifies the manufacturing of the battery casing, and reduces the battery cost.

[0015] The present invention also provides a battery comprising the battery casing described above, wherein one or more battery cells are disposed within the cavity.

[0016] Furthermore, the length L of the battery casing is 10mm ≤ L ≤ 600mm.

[0017] Compared with the prior art, the battery provided by the present invention has a simple battery casing structure and simplified manufacturing process, which greatly reduces the battery cost. Attached Figure Description

[0018] Figure 1 is a three-dimensional exploded view of the battery casing provided by the present invention;

[0019] Figure 2 is a three-dimensional schematic diagram of the core package assembly provided by the present invention;

[0020] Figure 3 is a three-dimensional schematic diagram of the insulating sleeve provided by the present invention;

[0021] Figure 4 is a cross-sectional schematic diagram of the connector provided by the present invention;

[0022] Figure 5 is a three-dimensional schematic diagram of the external connector provided by the present invention;

[0023] In the diagram: Top cover assembly 100, top cover plate 101, side plate 102, pole block 103; housing 200, front panel 201, bottom plate 202, inner cavity 203; core pack assembly 300, cell 301, height end 302; transverse section 400, vertical section 401, connector 402, connecting piece 4021, clamping groove 4022, bending piece 4023, side recessed groove 4024, elastic piece 4025, central recessed groove 4026, elastic groove 4027; insulating sleeve 500, insulating cavity 501, notched groove 502, liquid passage hole 503; external connector 600, external connector part 601, column 602, clamping piece 603, clamping area 604. The best embodiment of the present invention

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention 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 merely illustrative and not intended to limit the invention.

[0025] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0026] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0027] Referring to Figures 1-5, a preferred embodiment of the present invention is provided.

[0028] The battery casing includes a U-shaped top cover assembly 100 and a housing 200. The top cover assembly 100 covers the housing 200, forming a sealed inner cavity 203. Both the top cover assembly 100 and the housing 200 are made of metal. After the top cover assembly 100 and the housing 200 are connected together, they are welded together to form an integral structure.

[0029] The battery casing provided above has a U-shaped top cover assembly 100, which facilitates the manufacturing and forming of the top cover assembly 100. It can be directly formed by bending process. The top cover assembly 100 can be directly sealed on the housing 200. The inner cavity 203 is formed by the enclosing between the top cover assembly 100 and the housing 200, which greatly simplifies the structure of the housing 200 and facilitates the manufacturing and forming of the housing 200. At the same time, it simplifies the structure of the battery casing, simplifies the manufacturing of the battery casing, and reduces the battery cost.

[0030] Since the top cover assembly 100 is U-shaped and covers the housing 200, the structure of the housing 200 is also U-shaped and has a U-shaped opening. The top cover assembly 100 directly covers the U-shaped opening and is integrated with the housing 200 to close the U-shaped opening.

[0031] In this embodiment, the shell 200 is integrally formed. The shell 200 can be directly formed by bending sheet metal, which results in better structural strength of the entire shell 200 and simplifies the manufacturing of the shell 200.

[0032] In this embodiment, along the length of the housing 200, the housing 200 has wide side openings at both ends, and the top of the housing 200 has a top opening. The top cover assembly 100 covers the top opening and the two wide side openings.

[0033] The battery casing is rectangular, and the casing 200 is also rectangular. The two wide side openings and the top opening form a U-shaped opening, which fits the shape of the top cover assembly 100. After the top cover assembly 100 is placed on the casing 200, it covers the wide side openings and the top opening, and encloses the casing 200 to form a closed inner cavity 203.

[0034] In this embodiment, the top cover assembly 100 includes a top cover plate 101, and side plates 102 are formed at both ends of the top cover plate 101. The top cover plate 101 and the side plates 102 are integrally formed. The top cover plate 101 covers the top opening, and the two side plates 102 respectively cover the wide side opening.

[0035] The side panels 102 and the top cover 101 are bent together, and the two side panels 102 and the top cover 101 form a U-shaped arrangement. The top cover 101 and the side panels 102 are integrally formed, which facilitates the manufacturing of the top cover assembly 100. Alternatively, the top cover assembly 100 can also be formed separately.

[0036] In this embodiment, the housing 200 includes two rectangular panels 201 arranged at intervals, a bottom plate 202 between the bottoms of the two panels 201, the top opening described above formed between the tops of the two panels 201, and the wide side opening described above formed between the ends of the two panels 201 along the length direction of the panels 201.

[0037] The bottom plate 202 and the front plate 201 are arranged in a bent manner, so that the two front plates 201 and the bottom plate 202 form a U-shaped arrangement, which simplifies the structure of the housing 200 and facilitates the manufacturing of the housing 200.

[0038] In this embodiment, the top cover plate 101 is connected to the top of the two panels 201 respectively, the side plates 102 are connected to the ends of the two panels 201 respectively, and the bottom of the side plates 102 is connected to the bottom plate 202. In this way, when the top cover plate 101 and the side plates 102 are connected to the housing 200, the top cover assembly 100 and the housing 200 are connected to form an integral structure through the connection with the panels 201 and the bottom plate 202, and the structural strength is better.

[0039] In this embodiment, the side plate 102 is provided with an electrode post, and the top cover plate 101 is provided with an explosion-proof plate. Alternatively, the side plate 102 is provided with an explosion-proof plate, and the top cover plate 101 is provided with an electrode post. The arrangement of the explosion-proof plate and the electrode post can be determined according to actual needs; they can be arranged on the top cover plate 101 or on the side plate 102, and they can be arranged in the same direction or in opposite directions, etc.

[0040] This embodiment also provides a battery, which includes the battery casing described above, and an inner cavity 203 in which one or more battery cells 301 are placed.

[0041] The batteries described above have significantly reduced costs due to their simple casing structure and simplified manufacturing process.

[0042] In this embodiment, the dimensions of the battery casing are as follows:

[0043] The length L of the battery casing is 10mm≤L≤600mm, the height H of the battery casing is H, and the width W is W. The length of the battery casing is greater than the width of the battery casing. The length-to-height ratio L / H of the battery casing is 3≤L / H≤13, and the length-to-width ratio of the battery casing is 5≤L / W≤48.

[0044] In this embodiment, multiple battery cells 301 are arranged side-by-side along the length of the outer casing, greatly enhancing the space utilization rate inside the battery. The multiple battery cells 301 are arranged side-by-side along the length of the battery casing within the inner cavity 203, forming a core pack 300. Furthermore, the battery cells 301 are arranged vertically along the width of the battery casing, which further improves the utilization rate of the inner cavity 203 of the battery casing.

[0045] Along the parallel direction of multiple battery cells 301, adjacent battery cells 301 are arranged in an insulated contact manner, which can shorten the distance between battery cells 301 and further improve the utilization rate of the inner cavity 203.

[0046] In this embodiment, along the width direction of the battery casing, each end of the cell 301 has a height end 302, and the height end 302 is provided with a tab. Multiple cells 301 are connected in series or in parallel through the tabs. Since the cells 301 are arranged vertically and the height ends 302 are arranged in the vertical direction, the cell pack 300 can adapt to the structural characteristics of a long battery casing, avoiding the conventional structure of using long cells 301 in series, reducing the cost of the cell pack 300 and improving the utilization rate of the inner cavity 203 of the battery casing.

[0047] In this embodiment, an external connector 600 is provided in the inner cavity 203. The external connector 600 is electrically connected to the electrode tab. An electrode block 103 is provided on the outer side wall of the side plate 102. The external connector 600 passes through the side plate 102 and is arranged insulated from the side plate 102, and is electrically connected to the electrode block 103.

[0048] When the external connector 600 is connected to the tab, it is connected to the core package 300 and the external connector 600 is connected to the pole block 103 on the side plate 102, thereby realizing the electrical connection between the core package 300 and the pole block 103, which facilitates the connection between external devices and the core package 300.

[0049] In this embodiment, the tab includes an upright section 401 and a transverse section 400. The upright section 401 is electrically connected to the battery cell 301, and the transverse section 400 is arranged at intervals from the height end 302, extending along the plane direction of the height end 302. The tabs of adjacent battery cells 301 are electrically connected through the transverse section 400. Thus, by forming the transverse section 400, it is convenient to electrically connect adjacent battery cells 301. Of course, parallel or series connection can be used, depending on the actual needs.

[0050] In this embodiment, a connector 402 is provided between adjacent transverse segments 400, and a clamping groove 4022 is provided in the connector 402. The ends of the transverse segments 400 are clamped and fixed in the clamping groove 4022. In this way, when it is necessary to electrically connect adjacent cells 301, the transverse segments 400 are directly inserted into the clamping groove 4022, and the two transverse segments 400 are directly clamped and fixed by the connector 402. By using the clamping and fixing method, welding can be avoided.

[0051] In this embodiment, the external connector 600 includes an inner connector and an outer connector 601. The inner connector and the outer connector 601 are arranged with a bend. The inner connector is connected to the transverse section 400 of the electrode tab, realizing the electrical connection between the external connector 600 and the core package assembly 300. The outer connector 601 passes through the side plate 102, is insulated from the side plate 102, and is electrically connected to the electrode block 103. The bend between the inner connector and the outer connector 601 facilitates the connection of the external connector 600 to the electrode tab and the electrode block 103 respectively.

[0052] In this embodiment, the inner connection part includes two spaced clips 603, a clamping area 604 between the two clips 603, and a transverse segment 400 placed in the clamping area 604 and clamped and fixedly connected by the two clips 603, thereby realizing a quick connection between the tab and the inner connection part.

[0053] In this embodiment, a column 602 protrudes from the external connection part 601. The column 602 passes through the side plate 102 and is insulated from the side plate 102. The column 602 passes through the electrode block 103 and is fixedly connected to the electrode block 103 so that the electrode block 103 is fixed on the outer side wall of the side plate 102 and an electrical connection is achieved between the column 602 and the electrode block 103.

[0054] In this embodiment, an insulating sleeve 500 is provided on the height end 302. The insulating sleeve 500 wraps around the tabs of multiple battery cells 301, insulating the tabs from the battery casing. In addition, the insulating sleeve 500 can support and fix the tabs of the battery cells 301.

[0055] The insulating sleeve 500 has an insulating cavity 501 inside, in which the transverse sections 400 of the tabs of multiple battery cells 301 are placed. The insulating sleeve 500 has a notch groove 502, in which the upright sections 401 of the tabs of multiple battery cells 301 pass through the notch groove 502. The transverse sections 400 of the tabs are housed in the insulating cavity 501, and the upright sections 401 pass through the notch groove 502, which facilitates the assembly between the insulating sleeve 500 and the tabs and can fix the position of the transverse sections 400 of the tabs, preventing the transverse sections 400 of adjacent tabs from becoming disconnected in a vibrating environment.

[0056] In this embodiment, the outer shell is provided with a liquid injection hole, and the insulating sleeve 500 has an facing portion facing the liquid injection hole, and the facing portion is provided with a plurality of liquid passage holes 503. Electrolyte can be injected into the inner cavity 203 through the liquid injection hole. During the process of injecting electrolyte, under the action of gravity, the electrolyte can pass through the liquid passage holes 503, thus better wetting the core package assembly 300.

[0057] In a preferred embodiment, the facing portion is provided with a plurality of peripheral holes, which are arranged around the outer periphery of the liquid passage hole 503, thereby increasing the flow rate of the electrolyte through the insulating sleeve 500.

[0058] In this embodiment, the connector 402 includes two connecting pieces 4021 arranged vertically at intervals, and the aforementioned clamping groove 4022 is formed between the two connecting pieces 4021. The clamping groove 4022 has end openings at both ends. Two elastic pieces 4025 are provided in the middle of the clamping groove 4022. The elastic pieces 4025 are arranged longitudinally along the clamping groove 4022, and their ends are respectively abutted against the two connecting pieces 4021. The middle portion of the elastic piece 4025 is recessed and bent away from the end opening, forming an elastic groove 4027.

[0059] Two elastic pieces 4025 are arranged at intervals, and the inner sidewall of the connecting piece 4021 is arranged away from the clamping groove 4022 to form a central recessed groove 4026 for the compressed elastic piece 4025 to be inserted.

[0060] The inner wall of the connecting piece 4021 is recessed away from the clamping groove 4022 to form a side recessed groove 4024. An elastic bending piece 4023 is provided on the side recessed groove 4024. The two ends of the bending piece 4023 are fixedly connected to the ends of the side recessed groove 4024 respectively. The middle part of the bending piece 4023 bends and protrudes towards the clamping groove 4022 to form an elastic position.

[0061] When the transverse segment 400 is inserted into the clamping groove 4022 through the end opening, the end of the transverse segment 400 has a clamping section inserted into the elastic groove 4027, and the elastic positions of the two bent pieces 4023 elastically clamp the transverse segment 400 from top to bottom. The two connecting pieces 4021 of the connector 402 are clamped and deformed towards each other, so that the two connecting pieces 4021 press against the transverse segment 400 from top to bottom. At this time, the elastic positions of the bent pieces 4023 are compressed and deformed towards the side recessed groove 4024, and elastically press against the transverse segment 400, giving the transverse segments 400 a clamping elastic force. The elastic piece 4025 is compressed and deformed away from the end opening, the elastic groove 4027 is compressed and deformed, and the elastic piece 4025 is squeezed into the central recessed groove 4026. The elastic piece 4025 clamps the clamping section of the transverse segment 400, forming an elastic clamping and fixing of the end of the transverse segment 400.

[0062] In this way, two curved plates 4023 form an upper and lower elastic clamping of the transverse segment 400, and an elastic plate 4025 forms an end elastic clamping of the clamping section of the transverse segment 400. Based on the rigid pressing and clamping of the transverse segment 400 by the two connecting plates 4021, the multi-position elastic clamping of the elastic plate 4025 and the curved plate 4023 further ensures that the transverse segment 400 is firmly held in the clamping position. When the battery is in a vibrating environment, the transverse segment 400, being elastically clamped and fixed, can buffer the vibration and prevent it from detaching from the connector 402.

[0063] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A battery casing, characterized in that, It includes a U-shaped top cover assembly and a housing, wherein the top cover assembly covers the housing and forms a sealed inner cavity with the housing.

2. The battery casing as described in claim 1, characterized in that, The shell is integrally molded.

3. The battery casing as described in claim 1 or 2, characterized in that, Along the length of the housing, the housing has wide side openings at both ends, and the top of the housing has a top opening. The top cover assembly covers the top opening and the two wide side openings.

4. The battery casing as described in claim 3, characterized in that, The top cover assembly includes a top cover plate, with side plates formed at both ends of the top cover plate. The top cover plate and the side plates are integrally formed. The top cover plate covers the top opening, and the two side plates respectively cover the wide side opening.

5. The battery casing as described in claim 4, characterized in that, The housing includes two rectangular panels spaced apart, a bottom plate between the bottoms of the two panels, a top opening between the tops of the two panels, and a wide side opening between the ends of the two panels along the length of the panels.

6. The battery casing as described in claim 5, characterized in that, The top cover is connected to the top of the two panels respectively, the side panels are connected to the ends of the two panels respectively, and the bottom of the side panels is connected to the bottom plate.

7. The battery casing as described in claim 4, characterized in that, The side plate is provided with an electrode post, and the top cover plate is provided with an explosion-proof sheet.

8. The battery casing as described in claim 4, characterized in that, The side plate is equipped with an explosion-proof plate, and the top cover plate is equipped with an electrode post.

9. A battery, characterized in that, It includes the battery casing as described in any one of claims 1 to 8, wherein one or more battery cells are disposed in the inner cavity.

10. The battery as claimed in claim 9, characterized in that, The length L of the battery casing is 10mm ≤ L ≤ 600mm.

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