Battery shell with multiple anti-explosion valves, square battery, module and battery pack

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery shell with multiple anti-explosion valves, a square battery, a module and a battery pack. The battery shell comprises a square shell body and a plurality of anti-explosion valves, the square shell body comprises two end faces and four side faces, and the two end faces and the four side faces are connected in an enclosed mode to form a closed inner cavity for containing a battery cell; the anti-explosion valves are arranged on the two end faces and the four side faces. Through the arrangement, each surface of the square shell is provided with the anti-explosion valve, so that the limitation that only the anti-explosion valve is arranged on the top cover component can be eliminated, and the corresponding anti-explosion valve can be opened to remove local overlarge pressure no matter which surface in the square shell is positioned is overlarge in internal pressure; meanwhile, a plurality of anti-explosion valves can be opened at the same time to reduce the pressure at a plurality of positions in the square shell, so that the anti-explosion performance of the battery shell is greatly improved, the local overhigh pressure in the battery shell can be eliminated in time, and the use safety is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery shell with multiple explosion-proof valves, a square battery, a module and a battery pack. Background Art

[0002] With the development of electric vehicles, battery technology is also constantly breaking through. Safety performance is a key focus in the research, development, and production of lithium batteries. Due to the electrochemical characteristics of lithium batteries, after long-term cycling or exposure to harsh operating conditions such as high temperatures, the internal degradation of the battery can be severe, potentially leading to thermal runaway and increased internal pressure.

[0003] Existing lithium batteries are often equipped with explosion-proof valves, which are often integrated into the top cover of the battery cell. This limits the number of explosion-proof valves required by the number of top cover components. Specifically, if there is only one top cover component, only one explosion-proof valve is required; if there are two top cover components, only two explosion-proof valves are required. However, this arrangement limits the explosion-proof effect. If localized overpressure occurs within the battery, it cannot be effectively released, thus posing a potential safety hazard.

[0004] Based on the above, there is an urgent need for a multi-explosion-proof valve battery housing, square battery, module and battery pack. Utility Model Content

[0005] The first object of the present utility model is to provide a battery casing with multiple explosion-proof valves, which can further improve safety.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] Multi-explosion-proof valve battery enclosure, including:

[0008] A square shell, comprising two end faces and four side faces, wherein the two end faces and the four side faces are connected to form a closed inner cavity for accommodating the power supply core;

[0009] A plurality of explosion-proof valves are provided on the two end faces and the four side faces.

[0010] Preferably, the multi-explosion-proof valve battery housing further comprises at least one top cover component, and at least one of the top cover components is set as the end surface of the square shell.

[0011] Preferably, the number of the top cover components is two, and the two top cover components are set as the two end surfaces.

[0012] Preferably, the side surface includes a first surface and a second surface, the cross-sectional area of ​​the first surface is larger than the cross-sectional area of ​​the second surface, and two sides of the first surface are respectively connected to one of the second surfaces;

[0013] The battery housing with multiple explosion-proof valves further includes at least one top cover component, and at least one of the top cover components is configured as the second surface.

[0014] Preferably, the number of the top cover components is two, and the two top cover components are set as two second surfaces.

[0015] Preferably, the side surface includes a first surface and a second surface, the cross-sectional area of ​​the first surface is larger than the cross-sectional area of ​​the second surface, and two sides of the first surface are respectively connected to one of the second surfaces;

[0016] A plurality of explosion-proof valves are provided on the first surface.

[0017] Preferably, the side surface includes a first surface and a second surface, the cross-sectional area of ​​the first surface is larger than the cross-sectional area of ​​the second surface, and two sides of the first surface are respectively connected to one of the second surfaces;

[0018] The explosion-proof valve located on the first surface is located in the middle of the first surface, and the explosion-proof valve located on the second surface is located in the middle of the second surface.

[0019] The beneficial effects of the multi-explosion-proof valve battery casing provided by the present invention are as follows: through the multi-explosion-proof valve battery casing, each surface of the square casing is provided with an explosion-proof valve, thus eliminating the limitation of arranging the explosion-proof valve only on the top cover component, so that when the internal pressure at any surface of the square casing is too high, the corresponding explosion-proof valve can be opened to relieve the local excessive pressure, and multiple explosion-proof valves can also be opened at the same time to reduce the pressure at multiple positions in the square casing, thereby greatly improving the explosion-proof performance of the battery casing, ensuring that the local excessive pressure in the battery casing can be eliminated in time, and ensuring safety in use.

[0020] The second object of the present utility model is to provide a single cell battery, which can ensure that the local excessive pressure in the single cell battery can be eliminated in time, thereby improving the safety of use.

[0021] To achieve this purpose, the present invention adopts the following technical solutions:

[0022] A square battery comprises a battery cell and the aforementioned multi-explosion-proof valve battery casing, wherein the multi-explosion-proof valve battery casing contains a plurality of the battery cells.

[0023] The beneficial effects of the single cell provided by the present invention are as follows: since the single cell is provided with the above-mentioned multi-explosion-proof valve battery housing, when the internal pressure of the single cell is too high at any surface of the single cell, the corresponding explosion-proof valve can be opened to relieve the local excessive pressure, and multiple explosion-proof valves can also be opened simultaneously to reduce the pressure inside the single cell, thereby greatly improving the explosion-proof performance of the single cell, ensuring that the local excessive pressure in the single cell can be eliminated in time, and improving the safety of the single cell.

[0024] The third object of the present invention is to provide a module that reduces explosion risk and improves the safety and reliability of the module.

[0025] To achieve this purpose, the present invention adopts the following technical solutions:

[0026] The module comprises a module outer frame and the above-mentioned square batteries, wherein a plurality of the above-mentioned square batteries are limitedly accommodated in the module outer frame.

[0027] The module provided by the present invention has the beneficial effect of: by introducing the above-mentioned square battery into the outer frame of the module, when the local pressure inside the square battery is too high, the excessively high-pressure gas can be discharged to the outside through the explosion-proof valve on the corresponding side or end face, so that the pressure inside the square battery can be reduced in time, thereby reducing the risk of explosion of the square battery, and ensuring the safety and reliability of the use of the entire module.

[0028] The fourth object of the present utility model is to provide a battery pack that improves safety in use, reduces cost in use, and ensures economic benefits.

[0029] To achieve this purpose, the present invention adopts the following technical solutions:

[0030] The battery pack includes an outer frame, a thermal management component and the above-mentioned modules. A plurality of the modules are arranged in the outer frame. The thermal management component is accommodated in the outer frame and electrically connected to the plurality of the modules.

[0031] The beneficial effects of the battery pack provided by the present invention are as follows: the battery pack includes an outer frame, a thermal management component and the above-mentioned module, wherein the thermal management component can regulate the temperature inside the outer frame to ensure the safety and efficiency of the battery pack during operation. Since the above-mentioned square batteries are arranged in the module, the safety of the module is guaranteed, thereby improving the safety and reliability of the battery pack, reducing the cost of use, and ensuring economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of a battery housing with multiple explosion-proof valves provided in Example 1 of the present utility model.

[0033] In the picture:

[0034] 1. Square shell; 111. First surface; 112. Second surface; 2. Explosion-proof valve. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0036] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0037] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0038] In the description of this embodiment, terms such as "upper," "lower," "right," and "left" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0039] This embodiment provides a battery housing with multiple explosion-proof valves for use with prismatic batteries. The battery housing includes a prismatic housing 1 and multiple explosion-proof valves 2. The prismatic housing 1 includes two end faces (not shown) and four side faces, which together form a sealed inner cavity for accommodating battery cells. The number of cells can be one or more, and this embodiment does not limit this. Multiple explosion-proof valves 2 are provided on the two end faces and four side faces.

[0040] Through the above arrangement, each surface of the square shell 1 is provided with an explosion-proof valve 2. In this way, the limitation of providing the explosion-proof valve 2 only on the top cover component can be eliminated. When the internal pressure at any surface of the square shell 1 is too high, the corresponding explosion-proof valve 2 can be opened to relieve the local excessive pressure. Moreover, multiple explosion-proof valves 2 can be opened simultaneously to reduce the pressure at multiple positions in the square shell 1, thereby greatly improving the explosion-proof performance of the battery shell, ensuring that the local excessive pressure in the battery shell can be eliminated in time, and ensuring safety in use.

[0041] Optionally, in this embodiment, the multi-explosion-proof valve battery housing further includes at least one top cover component, and at least one top cover component serves as the end face of the square shell 1. It is understandable that the top cover component includes structures such as an injection hole, a pole terminal and an explosion-proof valve 2, wherein an external injection device can inject electrolyte into the square shell 1 through the injection hole for the internal battery cell to be conductive; the number of pole terminals can be one or two. When there are two pole terminals, one pole terminal serves as the positive electrode and the other pole terminal serves as the negative electrode. The pole terminals are conductively connected to the battery cell inside the square shell 1 to realize the charge and discharge function of the battery; the setting of the explosion-proof valve 2 allows the square shell 1 to release pressure to the outside through the top cover component. Through the above-mentioned setting, the important components of the battery can be integrated on the top cover component, thereby realizing the function and safe use of the battery.

[0042] Preferably, in this embodiment, there are two top cover components, one of which serves as one end surface and the other serves as the other end surface. One of the top cover components is provided with a terminal post, which can be either a positive or negative pole, and the other top cover component is provided with a terminal post, which can be either a negative or positive pole with opposite polarity, to achieve the design of a battery with two-terminal tabs required by actual operating conditions.

[0043] It can be understood that the two top cover components have the same structure, that is, both top cover components are provided with an explosion-proof valve 2 to ensure that the square shell 1 can release pressure and exhaust air outwards from both ends.

[0044] Specifically, in this embodiment, the side surface includes a first surface 111 and a second surface 112, wherein the cross-sectional area of ​​the first surface 111 is larger than that of the second surface 112, and a second surface 112 is connected to each side of the first surface 111; one or more explosion-proof valves 2 are provided on the first surface 111. Due to the large cross-sectional area of ​​the first surface 111, for batteries with a long length, if only one explosion-proof valve 2 is provided on the first surface 111, there is still a risk that the gas pressure at the edge of the explosion-proof valve 2 cannot be discharged outward in a timely and effective manner. Therefore, by providing multiple explosion-proof valves 2 on the first surface 111 (the arrangement of the multiple explosion-proof valves 2 is not limited, for example, they can be arranged in a "cross" shape, a "well" shape, a "U" shape, an X shape, etc.), the distance between the edge of the first surface 111 and the explosion-proof valve 2 can be reduced, so that the gas at the edge of the first surface 111 can be ejected outward from the nearest explosion-proof valve 2, thereby effectively reducing the internal pressure of the square housing 1 in a timely manner.

[0045] Preferably, in this embodiment, only one explosion-proof valve 2 is provided on each first surface 111 and each second surface 112 to effectively adapt to the size of the square housing 1. Furthermore, the explosion-proof valve 2 on the first surface 111 is located in the middle of the first surface 111, and the explosion-proof valve 2 on the second surface 112 is located in the middle of the second surface 112. This ensures that the explosion-proof valve 2 can be activated promptly when the pressure inside the square housing 1 is excessive.

[0046] This embodiment also provides a square battery, which includes a battery cell and a multi-explosion-proof valve battery housing provided in the above embodiment, wherein the multi-explosion-proof valve battery housing contains a plurality of battery cells. Since explosion-proof valves 2 are provided on both end faces and four side faces of the square housing 1 in the above multi-explosion-proof valve battery housing, each face of the square housing 1 has an explosion-proof valve 2. This eliminates the limitation of providing the explosion-proof valve 2 only on the top cover component, so that when the internal pressure at any position on the face of the square housing 1 is too high, the corresponding explosion-proof valve 2 can be opened to relieve the local excessive pressure. In addition, multiple explosion-proof valves 2 can be opened simultaneously to reduce the pressure at multiple positions in the square housing 1, thereby greatly improving the explosion-proof performance of the battery housing, thereby ensuring that the local excessive pressure in the square battery can be eliminated in a timely manner, and ensuring the safety of the square battery.

[0047] This embodiment also provides a module, comprising a module frame and the prismatic batteries provided in the above embodiment, with a plurality of prismatic batteries being positioned within the module frame. By introducing the prismatic batteries within the module frame, when localized pressure within the prismatic batteries is excessive, the excessively high-pressure gas can escape through the corresponding explosion-proof valves 2 on the side or end surfaces, allowing the pressure within the prismatic batteries to be promptly reduced, thereby reducing the risk of explosion and ensuring the safety and reliability of the entire module.

[0048] This embodiment also provides a battery pack, comprising an outer frame, a thermal management component, and the modules provided in the above embodiments. The outer frame houses a plurality of modules, and the thermal management component is housed within the outer frame and electrically connected to the modules. The thermal management component regulates the temperature within the outer frame to ensure the safety and efficiency of the battery pack during operation. The modules, which contain the aforementioned prismatic batteries, ensure the safety of the modules, thereby improving the safety and reliability of the battery pack, reducing operating costs, and ensuring economic benefits.

[0049] Example 2

[0050] This embodiment provides a battery housing with multiple explosion-proof valves, which differs from the battery housing with multiple explosion-proof valves provided in the first embodiment in that:

[0051] One of the top cover components is disposed on one of the second surfaces 112, and the other top cover component is disposed on the other second surface 112. Similar to the principle of the first embodiment, one of the top cover components is provided with a pole terminal, which can be a positive pole or a negative pole, and the other top cover component is provided with a pole terminal, which can be a negative pole or a positive pole with opposite polarity, to achieve the design of a battery with tabs at both ends required by actual working conditions.

[0052] It can be understood that the two top cover components have the same structure, that is, both top cover components are provided with an explosion-proof valve 2 to ensure that the square shell 1 can release pressure and exhaust air outwards from both ends.

[0053] Of course, in other alternative implementations of this embodiment, only one top cover component may be provided, and both poles are mounted on this top cover component to meet the production requirements of the same-side output tabs.

[0054] Throughout this specification, references to terms such as "some embodiments" and "other embodiments" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0055] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Multiple explosion-proof valve battery housing, characterized in that, include: A square shell (1), the square shell (1) comprising two end faces and four side faces, the two end faces and the four side faces being connected and enclosed to form a closed inner cavity for accommodating a power supply core; A plurality of explosion-proof valves (2) are provided on the two end faces and the four side faces.

2. The multi-explosion-proof valve battery housing according to claim 1, characterized in that: The multi-explosion-proof valve battery housing further comprises at least one top cover component, and at least one of the top cover components is set as the end surface of the square shell (1).

3. The multi-explosion-proof valve battery housing according to claim 2, characterized in that: The number of the top cover components is two, and the two top cover components are set as the two end surfaces.

4. The battery housing with multiple explosion-proof valves according to claim 1, characterized in that: The side surface comprises a first surface (111) and a second surface (112), the cross-sectional area of ​​the first surface (111) is larger than the cross-sectional area of ​​the second surface (112), and two sides of the first surface (111) are respectively connected to one second surface (112); The multi-explosion-proof valve battery housing further comprises at least one top cover component, and at least one of the top cover components is set as the second surface (112).

5. The battery housing with multiple explosion-proof valves according to claim 4, characterized in that: The number of the top cover parts is two, and the two top cover parts are set as two second surfaces (112).

6. The battery housing with multiple explosion-proof valves according to claim 1, characterized in that: The side surface comprises a first surface (111) and a second surface (112), the cross-sectional area of ​​the first surface (111) is larger than the cross-sectional area of ​​the second surface (112), and two sides of the first surface (111) are respectively connected to one second surface (112); A plurality of explosion-proof valves (2) are provided on the first surface (111).

7. The battery housing with multiple explosion-proof valves according to claim 1, characterized in that: The side surface comprises a first surface (111) and a second surface (112), the cross-sectional area of ​​the first surface (111) is larger than the cross-sectional area of ​​the second surface (112), and two sides of the first surface (111) are respectively connected to one second surface (112); The explosion-proof valve (2) located on the first surface (111) is located in the middle of the first surface (111), and the explosion-proof valve (2) located on the second surface (112) is located in the middle of the second surface (112).

8. A square battery, characterized in that: The invention comprises a battery cell and a battery casing with multiple explosion-proof valves according to any one of claims 1 to 7, wherein the battery cell is housed in the battery casing with multiple explosion-proof valves.

9. A module, characterized in that: It comprises a module outer frame and the square battery according to claim 8, wherein a plurality of the square batteries are limitedly accommodated in the module outer frame.

10. A battery pack, characterized in that: It comprises an outer frame, a thermal management component and the module according to claim 9, wherein a plurality of the modules are arranged in the outer frame, and the thermal management component is accommodated in the outer frame and electrically connected to the plurality of the modules.

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