Battery shell, battery and electric equipment

Abstract

The utility model discloses a battery shell, a battery and electric equipment, and belongs to the technical field of lithium batteries. The battery shell comprises a shell body, an anti-explosion area is arranged on one side face of the shell body, anti-explosion lines are formed in the anti-explosion area through etching or stamping, and the wall thickness of the shell body where the anti-explosion lines are located is thinner than that of the shell body at other positions; the explosion-proof casing further comprises reinforcing ribs arranged close to the explosion-proof lines, the reinforcing ribs comprise first reinforcing ribs arranged on the casing and / or reinforcing plates arranged close to the inner surface of the casing, and gaps are reserved between the inner surface of the casing and the reinforcing plates. According to the scheme, the reinforcing ribs are arranged close to the anti-explosion lines, the strength of the anti-explosion area on the shell is improved, deformation of the anti-explosion area is reduced, and the valve opening stability of the anti-explosion lines is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, and more specifically, to a battery shell, a battery and an electrical device. Background Art

[0002] At present, new energy vehicles and electric vehicles have become a new development trend in the automotive industry; and lithium batteries, as the power source for equipment such as pure electric vehicles, plug-in hybrid vehicles and electric bicycles, are also widely used in the new energy field.

[0003] Currently, most lithium batteries are encapsulated in aluminum casings. Due to the presence of numerous chemical substances within the battery, a large amount of mixed gas is generated during the charge and discharge process, causing the internal pressure to continuously increase. If the pressure is not released in a timely manner, the battery may explode. To prevent battery explosions, a common measure is to install an explosion-proof device on the battery cover. However, if the pressure in the battery fluctuates and becomes excessive, if the explosion-proof valve welded to the cover is not stable enough, it may spontaneously crack during use due to collisions or other reasons, rendering the battery scrapped.

[0004] Furthermore, traditional methods require drilling a hole in the top cover and separately fabricating the explosion-proof valve, requiring high-precision laser welding equipment. Currently, the explosion-proof valve is integrated with the housing, etching or stamping a thinner area on the housing to achieve explosion-proof functionality. However, this approach can compromise the housing's strength and easily cause deformation of the aluminum shell, which in turn affects the valve's opening stability and the number of battery breathing test cycles. Utility Model Content

[0005] The utility model provides a battery shell, a battery and an electrical device, so as to solve the problem of low strength of the shell of the existing explosion-proof valve integrated by etching or stamping.

[0006] In order to achieve the above-mentioned purpose, the technical solution provided by the present utility model is:

[0007] A battery casing, comprising a shell,

[0008] An explosion-proof area is provided on one side of the shell, and explosion-proof lines are etched or punched on the explosion-proof area. The shell wall thickness at the location of the explosion-proof lines is thinner than that at other locations.

[0009] It also includes reinforcing ribs arranged near the explosion-proof lines, and the reinforcing ribs include first reinforcing ribs arranged on the shell and / or reinforcing plates arranged near the inner surface of the shell, and there is a gap between the inner surface of the shell and the reinforcing plates.

[0010] In this solution, reinforcing ribs are provided near the explosion-proof lines to increase the strength of the explosion-proof area on the shell, reduce deformation of the explosion-proof area, and improve the stability of the explosion-proof lines when opening the valve.

[0011] As a further improvement, the first reinforcing rib is in a strip shape, which makes it easier to set and form the first reinforcing rib.

[0012] As a further improvement, the first reinforcing rib is in an arc shape. The arc-shaped first reinforcing rib can reinforce more areas and improve the reinforcement effect.

[0013] As a further improvement, the first reinforcing rib is integrally formed with the shell, or the first reinforcing rib is fixedly connected to the shell.

[0014] As a further improvement, exhaust holes corresponding to the positions of the explosion-proof areas are provided on the reinforcing plate.

[0015] As a further improvement, protrusions are provided at both ends of the reinforcing plate, which are connected to the housing, creating a gap of 0.5-2 mm between the inner surface of the housing and the reinforcing plate. This gap serves as a gas channel, allowing gas inside the battery to flow to the explosion-proof area during charging and discharging.

[0016] As a further improvement, the reinforcing plate is further provided with a second reinforcing rib, which is fixedly connected to the housing and positioned near both ends of the exhaust hole. The second reinforcing rib not only strengthens the reinforcing plate itself but also secures the connection to the housing, reinforcing the explosion-proof area.

[0017] As a further improvement, a plurality of through holes are provided at intervals on the reinforcing plate.

[0018] The utility model also provides a battery, comprising a battery core and a battery shell, wherein the battery core is arranged in the battery shell.

[0019] The utility model also provides an electrical device, comprising the battery described above, and the battery is used to supply power to the device.

[0020] Other technical problems that can be solved by a battery housing, a battery and an electrical device of the present invention, other technical features included in the technical solution and the advantages brought by these technical features will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the overall structure of the battery housing;

[0022] Figure 2 This is a schematic diagram of the integrated reinforcement structure;

[0023] Figure 3 Schematic diagram of another integrated reinforcement structure;

[0024] Figure 4 This is a schematic diagram of another integrated reinforcement structure;

[0025] Figure 5 A schematic diagram of the battery housing structure with a reinforcement plate;

[0026] Figure 6 Schematic diagram of the reinforcement plate structure.

[0027] Description of labels:

[0028] 1. Shell; 11. First reinforcing rib;

[0029] 2. Explosion-proof pattern;

[0030] 3. Reinforcement plate; 31. Exhaust hole; 32. Second reinforcing rib; 33. Protrusion; 34. Through hole;

[0031] 4. Protective film. DETAILED DESCRIPTION

[0032] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings and embodiments.

[0033] The structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in this specification so as to facilitate understanding and reading by those familiar with this technology. They are not intended to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modifications, changes in proportional relationships, or adjustments in size, without affecting the efficacy and objectives that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed in the present invention.

[0034] At the same time, the terms such as "upper", "lower", "left", "right", "inner", "outer", and "middle" cited in this specification are only for the convenience of description and are not intended to limit the scope of implementation. Changes or adjustments in their relative relationships should also be considered as the scope of implementation of this utility model without substantially changing the technical content. Moreover, in addition to being used to indicate orientation or positional relationships, some of the above terms may also be used to express other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances.

[0035] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, for the purposes of describing the embodiments of the present application herein.

[0036] Combine Figure 1 、 Figure 2 and Figure 5 As shown, this embodiment provides a battery housing, including a housing 1, and the housing 1 forms a battery housing in a rectangular parallelepiped shape.

[0037] To improve battery safety, an explosion-proof area is provided on one side of the housing 1. This area is typically located on a narrow side of the housing 1. An explosion-proof pattern 2 is etched or stamped into the area. The thickness of the housing 1 where the pattern 2 is located is thinner than elsewhere. This means that the aluminum housing is formed with thinner patterns 2. Because these patterns are thinner, they are more easily damaged, giving them a priority opening function. This acts as an explosion-proof valve, achieving explosion-proof functionality.

[0038] The battery shell is usually made of aluminum shell with a wall thickness between 0.1-1.5mm. The wall thickness is relatively thin. Setting an explosion-proof pattern 2 with an even thinner wall thickness on the thin-walled shell will affect the strength of the shell and have a greater impact on the opening of the valve during battery use. Therefore, it is necessary to strengthen the area around the explosion-proof area.

[0039] In this embodiment, a reinforcement rib is provided on the explosion-proof area near the explosion-proof pattern 2, and the reinforcement rib includes a first reinforcement rib 11 provided on the shell 1. Two first reinforcement ribs 11 are provided, one on each side of the explosion-proof pattern 2. Figure 2 As shown, the first reinforcing rib 11 is in a strip shape, and the linear strip shape makes the first reinforcing rib 11 easier to arrange and form.

[0040] like Figure 3 As shown, in other cases, the first reinforcing rib 11 may also be in an arc shape, in which case the arc-shaped first reinforcing rib 11 bends in a direction away from the explosion-proof lines 2. In another case, as shown in FIG. Figure 4 As shown in , the first reinforcing rib 11 is also arc-shaped. In this case, the arc-shaped first reinforcing rib 11 bends toward the direction close to the explosion-proof pattern 2. The arc-shaped first reinforcing rib 11 can reinforce more areas of the first reinforcing rib 11 and improve the reinforcement effect.

[0041] Preferably, the first reinforcing rib 11 is integrally formed with the housing 1, for example, a concave or convex first reinforcing rib 11 can be formed by stamping the housing 1. In other cases, the first reinforcing rib 11 is fixedly connected to the housing 1, for example, a metal strip can be welded to the housing 1 to form the first reinforcing rib 11.

[0042] like Figure 5 and Figure 6 As shown, in another embodiment, the reinforcing ribs are still positioned near the explosion-proof pattern 2. The reinforcing ribs include a reinforcing plate 3 positioned near the inner surface of the housing 1, with a gap between the inner surface of the housing 1 and the reinforcing plate 3. The reinforcing plate 3 is made of the same material as the housing 1. Exhaust holes 31 are defined on the reinforcing plate 3, corresponding to the location of the explosion-proof area. Located on the inner surface of the housing 1 where the explosion-proof area is located, the reinforcing plate 3 reinforces the explosion-proof area and effectively prevents deformation of the explosion-proof area.

[0043] Protrusions 33 are provided at each end of the reinforcing plate 3. These protrusions 33 are connected to the housing 1, creating a 1mm gap between the inner surface of the housing 1 and the reinforcing plate 3. This gap serves as a gas channel, allowing gas inside the battery to flow to the explosion-proof area during charge and discharge. The gap can also be set to other sizes, ranging from 0.5 to 2mm, to ensure sufficient gas flow while minimizing the impact on the overall energy density of the battery.

[0044] As a further improvement, second reinforcing ribs 32 are provided on the reinforcing plate 3. The second reinforcing ribs 32 are fixedly connected to the housing 1 and are located near both ends of the exhaust hole 31. The thickness of the reinforcing plate 3 is typically set to 0.2 mm. The provision of the second reinforcing ribs 32 not only strengthens the reinforcing plate 3 itself, but also secures the second reinforcing ribs 32 to the housing 1 and reinforces the explosion-proof area.

[0045] A plurality of through holes 34 are spaced apart on the reinforcing plate 3 . The through holes 34 can expand the channel area for gas diffusion and also reduce the weight of the reinforcing plate 3 .

[0046] In another case, the first reinforcing rib 11 and the reinforcing plate 3 arranged close to the inner surface of the shell 1 may also be provided on the shell 1 at the same time.

[0047] Generally speaking, the role of the reinforcement ribs is to reduce the deformation of the explosion-proof area during battery use and to improve the stability of the explosion-proof pattern 2 opening valve.

[0048] Finally, a protective film 4 is covered on the explosion-proof area to protect the explosion-proof area from the risk of scratches and to provide an aesthetic effect.

[0049] The present application also provides a battery, comprising a battery cell and the battery casing, wherein the battery cell is arranged in the battery casing, and the battery can be a power battery or an energy storage battery.

[0050] The present application also provides an electrical device including the battery, wherein the battery is used to power the device. For example, the electrical device may be a new energy electric vehicle, a hybrid vehicle, or the like.

[0051] The terms "installed," "disposed," "equipped with," and "connected" as used herein should be interpreted broadly. For example, they may refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0052] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the inventive purpose of the present invention, designs a structure and embodiment similar to the technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A battery housing, comprising a housing (1), characterized in that: An explosion-proof area is provided on one side of the shell (1), and an explosion-proof pattern (2) is formed on the explosion-proof area by etching or punching, and the wall thickness of the shell (1) at the location of the explosion-proof pattern (2) is thinner than the wall thickness of the shell (1) at other locations; It also includes reinforcing ribs arranged near the explosion-proof pattern (2), the reinforcing ribs including first reinforcing ribs (11) arranged on the shell (1) and / or reinforcing plates (3) arranged near the inner surface of the shell (1), and a gap is provided between the inner surface of the shell (1) and the reinforcing plates (3).

2. The battery housing according to claim 1, wherein: The first reinforcing rib (11) is in a strip shape.

3. The battery housing according to claim 1, wherein: The first reinforcing rib (11) is in an arc shape.

4. The battery housing according to claim 2 or 3, wherein: The first reinforcing rib (11) is integrally formed with the shell (1), or the first reinforcing rib (11) is fixedly connected to the shell (1).

5. The battery housing according to claim 1, wherein: The reinforcing plate (3) is provided with an exhaust hole (31) corresponding to the position of the explosion-proof area.

6. The battery housing according to claim 5, wherein: Protrusions (33) are respectively provided at both ends of the reinforcing plate (3), and the protrusions (33) are connected to the shell (1), so that a gap of 0.5-2 mm is formed between the inner surface of the shell (1) and the reinforcing plate (3).

7. The battery housing according to claim 6, wherein: A second reinforcing rib (32) is also provided on the reinforcing plate (3), the second reinforcing rib (32) is fixedly connected to the shell (1), and the second reinforcing rib (32) is provided near both ends of the exhaust hole (31).

8. The battery housing according to claim 6, wherein: The reinforcing plate (3) is also provided with a plurality of through holes (34) at intervals.

9. A battery, characterized in that: The invention comprises a battery core and a battery casing according to any one of claims 1 to 8, wherein the battery core is arranged in the battery casing.

10. An electrical device, characterized in that: A battery according to claim 9, wherein the battery is used to power a device.

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