Battery shell, battery and vehicle

Abstract

The utility model relates to a battery shell, the battery shell is provided with an inner cavity, and one side of the battery shell is provided with a mounting point for mounting a battery top cover or a pole; the side wall of the other side of the battery shell comprises a side wall body, a sinking table which is sunken in the direction opposite to the inner cavity relative to the side wall body, and a plurality of first bosses which are bulged in the direction towards the inner cavity relative to the side wall body; the first bosses are arranged at intervals, and the first bosses and the edge of the side wall body are arranged at intervals, so that a flow channel is formed in the side, close to the inner cavity, of the side wall body. A space used for containing an anti-explosion valve is defined by the sinking table, and a blast hole penetrating through the side wall is formed in the sinking table. The utility model also provides a battery. The utility model further provides a vehicle. According to the utility model, the explosion-proof valve and the pole are arranged on different sides, so that thermoelectric separation is realized. The battery shell provided by the utility model also has the characteristics of reasonable flow channel arrangement and easiness in manufacturing.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery casing, a battery and a vehicle. Background Art

[0002] In existing batteries, the explosion-proof valve is usually set at the center of the battery top cover, and the battery pole is also set on the battery top cover, which results in the pole and the explosion-proof valve being on the same side. This type of battery faces the following technical problems:

[0003] When the battery thermally runs away, the high-temperature ejecta ejected from the explosion-proof valve will damage or even destroy the pole insulation and the cooling system fixed above the pole, causing the cooling system electrical signal to be disconnected and the pole insulation to fail, increasing the possibility of thermal runaway spreading. Utility Model Content

[0004] The purpose of the utility model is to provide a battery housing, a battery and a vehicle to alleviate or eliminate at least one of the above-mentioned technical problems.

[0005] The utility model discloses a battery housing, wherein the battery housing has an inner cavity, and one side of the battery housing is provided with a mounting point for mounting a battery top cover or a pole; the side wall of the other side of the battery housing comprises a side wall body, a sinking platform that is recessed relative to the side wall body in a direction away from the inner cavity, and a plurality of first bosses that protrude relative to the side wall body in a direction toward the inner cavity;

[0006] The first bosses are spaced apart from each other, and the first bosses and the edge of the side wall body are spaced apart from each other, so as to form a flow channel on a side of the side wall body close to the inner cavity;

[0007] The sinking platform encloses a space for accommodating the explosion-proof valve, and a blasting hole penetrating the side wall is arranged at the sinking platform.

[0008] Optionally, a plurality of the first bosses are distributed in an array.

[0009] Optionally, a plurality of the first bosses and the sinks are spaced apart from each other.

[0010] Optionally, the sink is arranged at the center of the side wall.

[0011] Optionally, the sink is formed by a portion of the side wall arching in a direction away from the inner cavity, and the plurality of bosses are respectively formed by a plurality of portions of the side wall arching in a direction away from the inner cavity.

[0012] Optionally, the side wall is the bottom wall of the battery housing.

[0013] The utility model also provides a battery, comprising an explosion-proof valve and any one of the battery housings described above, wherein the explosion-proof valve is installed in the space.

[0014] Optionally, an insulating film is further included, which is supported on the top surfaces of the plurality of bosses, and the insulating film is provided with a plurality of through holes, which connect the flow channel and the portion of the inner cavity located on the side of the insulating film facing away from the flow channel.

[0015] Optionally, the side surface of the explosion-proof valve on the side close to the inner cavity is flush with the side surface of the side wall body on the side close to the inner cavity.

[0016] The utility model also provides a vehicle, comprising any one of the batteries described above.

[0017] The utility model realizes thermal and electrical separation by arranging the explosion-proof valve and the pole on different sides, which can reduce the possibility of high-temperature eruption from the explosion-proof valve damaging the pole insulation and cooling system, and can reduce the possibility of thermal runaway diffusion. The battery housing proposed by the utility model also has the characteristics of reasonable flow channel arrangement and easy manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the structure of the battery housing described in some embodiments;

[0019] Figure 2 is a bottom view of a battery housing described in some embodiments;

[0020] Figure 3 for Figure 2 AA section view in;

[0021] Figure 4 for Figure 2 BB section view in;

[0022] Figure 5 Schematic diagram of the structure of the insulating film described in some embodiments.

[0023] Among them, 1-battery housing; 2-explosion-proof valve; 3-insulating film; 11-side wall; 31-through hole;

[0024] 111 - side wall body; 112 - second boss; 113 - blasting hole; 114 - first boss; 115 - sinking platform; 116 - inner side surface; 117 - top surface. DETAILED DESCRIPTION

[0025] The following will describe the implementation of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0026] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0027] like Figures 1 to 4 A battery shell 1 is shown, the battery shell 1 has an inner cavity, and one side of the battery shell 1 is provided with a mounting point for mounting a battery top cover or a pole; the side wall 11 on the other side of the battery shell 1 includes a side wall body 111, a sink 115 recessed in a direction away from the inner cavity relative to the side wall body 111, and a plurality of first bosses 114 protruding in the direction of the inner cavity relative to the side wall body 111; the plurality of first bosses 114 and the plurality of first bosses 114 and the edges of the side wall body 111 are spaced from each other to form a flow channel on the side of the side wall body 111 close to the inner cavity; the sink 115 encloses a space for accommodating an explosion-proof valve 2, and a blasting hole 113 penetrating the side wall 11 is provided at the sink 115, and the blasting hole 113 can provide an ejection channel for the explosion-proof valve 2.

[0028] By adopting the above technical solution, the explosion-proof valve 2 and the pole are arranged on opposite sides, so as to achieve thermal and electrical separation, reduce the possibility of high-temperature eruption materials ejected from the explosion-proof valve 2 damaging the pole insulation and cooling system, and reduce the possibility of thermal runaway spreading.

[0029] A plurality of first bosses 114 are provided on the side wall 11 where the explosion-proof valve 2 is installed, so that a flow channel can be formed on the side of the side wall body 111 close to the inner cavity, and the electrolyte and gas inside the battery can flow in the flow channel. The gas can flow to the explosion-proof valve 2 through the flow channel, and then be ejected through the explosion-proof valve 2. The flow channel can also add a channel for the flow of the electrolyte, which can improve the infiltration efficiency of the electrolyte.

[0030] In the above technical solution, multiple first bosses 114 and multiple first bosses 114 and the edge of the side wall body 111 are spaced apart from each other, and flow channels for electrolyte and gas flow are formed between two adjacent first bosses 114 and between the first bosses 114 and the edge of the side wall body 111, forming a grid-like flow channel. The grid-like flow channel has a wider range, and the gas inside the battery can more easily enter the flow channel, and the gas inside the battery can better flow through the flow channel to the explosion-proof valve 2. At the same time, the grid-like flow channel can further improve the infiltration efficiency of the electrolyte.

[0031] In a specific implementation, one side of the battery housing 1 may be configured as an open structure, and the open structure serves as a mounting point for mounting a battery top cover or a pole.

[0032] In some embodiments, the plurality of first bosses 114 are distributed in an array, which can form a more uniform grid-like flow channel, and also enable the plurality of first bosses 114 to provide uniform support for the pole core of the battery.

[0033] In some embodiments, the plurality of first bosses 114 and the sinks 115 are spaced apart from each other, so that the gas in the flow channel can flow to the sinks 115 more easily.

[0034] In some embodiments, the sink 115 is disposed at the center of the side wall 11 , so that the gas in the flow channel can flow to the sink 115 more evenly.

[0035] In some embodiments, the countersunk platform 115 is formed by a portion of the side wall 11 that is arched in the direction away from the inner cavity, and the arched portion also forms a second boss 112 that protrudes from the side wall body 111 in the direction away from the inner cavity. The formation of the second boss 112 helps to improve the structural strength of the side wall 11, and the multiple bosses are respectively formed by multiple portions of the side wall 11 that are arched in the direction of the inner cavity. With the above-mentioned technical solution, the countersunk platform 115 and the multiple second bosses 112 can be formed by stamping, which has the characteristic of easy processing. In addition, since the multiple first bosses 114 and the edges of the side wall body 111 are spaced apart from each other, that is, the multiple first bosses 114 and the wall portion of the shell connected to the side wall 11 are spaced apart from each other, the difficulty of forming the multiple first bosses 114 can be further reduced.

[0036] In some embodiments, the side wall 11 is the bottom wall of the battery housing 1, so that the explosion-proof valve 2 and the battery top cover are in opposite directions and have a large distance, which can ensure the effect of thermal and electrical separation. As a preferred solution, four first bosses 114 are arranged on the bottom wall of the battery housing 1, and a field-shaped flow channel is formed on the upper side of the bottom wall of the battery housing 1, and the sink 115 is arranged at the center of the flow channel.

[0037] In some embodiments, the utility model further proposes a battery, comprising an explosion-proof valve 2 and a battery housing 1 as described in any of the above items, wherein the explosion-proof valve 2 is installed in the space surrounded by the sink 115, and the explosion-proof valve 2 and the pole are arranged on different sides to achieve thermal and electrical separation.

[0038] In some embodiments, Figure 5 As shown, the battery further includes an insulating film 3, which is supported on the top surface 117 of the plurality of first bosses 114, and is provided with a plurality of through holes 31, the plurality of through holes 31 connecting the flow channel and the portion of the inner cavity located on the side of the insulating film 3 facing away from the flow channel. The plurality of through holes 31 are provided on the insulating film 3, and the electrolyte and gas can enter and exit the flow channel through the plurality of through holes 31. In a specific implementation, the plurality of through holes 31 are arranged at intervals along the extension direction of the flow channel.

[0039] As a preferred example, the side of the explosion-proof valve 2 on the inner cavity side is flush with the side of the side wall body 111 on the inner cavity side, that is, the side of the explosion-proof valve 2 on the inner cavity side is flush with the inner side 116 of the side wall body 111, so that the electrolyte and gas can flow smoothly in the flow channel. In specific implementation, the explosion-proof valve 2 can be fixedly connected to the sink 115 by welding.

[0040] In the above-mentioned battery, multiple first bosses 114 carry the insulating film 3 and the battery pole core, and the insulating film 3 and the flow channel form a cavity. Multiple through holes 31 connect the cavity and the inner cavity located on the side of the insulating film 3 facing away from the flow channel. Multiple through holes 31 provide through holes for the electrolyte to infiltrate the bottom of the pole core, realizing the function of the insulating film bottom support plate, and then the insulating film bottom support plate can be eliminated. At the same time, when the battery thermally runs away, a large amount of gas is generated inside the battery, and the pressure gradually increases. The above-mentioned flow channel can allow gas to pass under high pressure, providing a gas flow channel for the explosion-proof valve 2 to open.

[0041] As a specific example, the battery top cover of the battery is installed on the top of the battery casing 1, the battery pole is installed on the battery top cover, the battery pole core is accommodated in the inner cavity of the battery casing 1, the battery pole core is supported on the insulating film 3, and the insulating film 3 is supported on multiple first bosses 114.

[0042] It should be noted that the size and number of the first bosses 114 are not limited and can be set as needed, and the shape of the first bosses 114 is not limited to the rectangle shown in the drawings, but can also be regular shapes such as square, circle, hexagon and triangle, or irregular shapes.

[0043] The utility model also provides a vehicle, comprising any one of the batteries described above.

[0044] The above embodiments are only preferred embodiments for fully illustrating the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or changes made by technicians in the technical field on the basis of the present utility model are all within the protection scope of the present utility model. In the description of this specification, the description of reference terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics of the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

Claims

1. A battery housing, characterized in that: The battery housing has an inner cavity, and a mounting point for mounting a battery top cover or a pole is provided on one side of the battery housing; a side wall (11) on the other side of the battery housing comprises a side wall body (111), a sink (115) recessed relative to the side wall body (111) in a direction away from the inner cavity, and a plurality of first bosses (114) protruding relative to the side wall body (111) in a direction toward the inner cavity; The plurality of first bosses (114) and the plurality of first bosses (114) and the edge of the side wall body (111) are arranged at intervals to form a flow channel on a side of the side wall body (111) close to the inner cavity; The sink (115) encloses a space for accommodating the explosion-proof valve (2), and a blasting hole (113) penetrating the side wall (11) is provided on the sink (115).

2. The battery housing according to claim 1, characterized in that: The plurality of first bosses (114) are distributed in an array.

3. The battery housing according to claim 1, characterized in that: A plurality of the first protrusions (114) and the sinks (115) are arranged at intervals from each other.

4. The battery housing according to claim 1, characterized in that: The sink (115) is arranged at the center of the side wall (11).

5. The battery housing according to claim 1, characterized in that: The sink (115) is formed by a portion of the side wall (11) arching in a direction away from the inner cavity, and the plurality of bosses are respectively formed by a plurality of portions of the side wall (11) arching in a direction away from the inner cavity.

6. The battery housing according to claim 1, characterized in that: The side wall (11) is the bottom wall of the battery casing.

7. A battery, characterized in that: The battery case comprises an explosion-proof valve (2) and the battery case according to any one of claims 1 to 6, wherein the explosion-proof valve (2) is installed in the space.

8. The battery according to claim 7, characterized in that: It also comprises an insulating film (3), the insulating film (3) being supported on the top surfaces (117) of the plurality of bosses, the insulating film (3) being provided with a plurality of through holes (31), the plurality of through holes (31) being connected to the flow channel and a portion of the inner cavity located on a side of the insulating film (3) facing away from the flow channel.

9. The battery according to claim 7, characterized in that: The side surface of the explosion-proof valve (2) on the side close to the inner cavity is flush with the side surface of the side wall body (111) on the side close to the inner cavity.

10. A vehicle, characterized in that: A battery comprising any one of claims 7 to 9.

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