Battery cell shell structure

Abstract

The utility model discloses a battery cell shell structure which is provided with a box body, the box body is provided with an outer shell and an inner shell, the inner shell is arranged on the inner side of the outer shell, a temperature control solution is arranged between the outer shell and the inner shell, and a circulating system of the temperature control solution is further arranged, so that a battery cell can well dissipate heat in the working process; the problem that the safety protection performance is poor is solved. The thermal management efficiency of the battery pack module is improved, the risk of thermal runaway is reduced, the structural strength of the battery pack module is improved, and the safety of the battery PACK is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of power batteries, and in particular relates to a battery core shell structure. Background Art

[0002] In the process of implementing the present invention, the inventors discovered that the prior art has at least the following problems:

[0003] Onboard energy storage devices are the sole energy source for electric vehicles and a key determinant of their performance. Currently developed onboard energy storage devices primarily rely on batteries. Onboard power supplies must consist of several or even hundreds of individual cells connected in series, combined into battery packs to produce a high-voltage, high-current power supply. Under actual operating conditions, the discharge and charge capabilities of battery cells are significantly affected by ambient temperature. Prolonged use under relatively extreme operating conditions can severely impact the lifespan of the cells and cause irreversible damage to the onboard energy storage.

[0004] Existing battery cell thermal management systems often manage the battery module, resulting in inefficient thermal management. They lack the ability to manage the thermal performance of individual cells, making it impossible to effectively and timely control the temperature of individual cells in real time. In extremely cold environments, the average temperature of the cells cannot be quickly and evenly increased. In high-temperature environments, effective thermal management strategies cannot be implemented for the cells at the center of the module, resulting in overheating of individual cells and increasing the risk of thermal runaway in the battery pack.

[0005] CN219998384U - An Improved Lithium Battery Cell Housing, discloses an improved lithium battery cell housing, relating to the technical field of sodium battery cell housing installation. The utility model comprises a main body mechanism, including a housing slot and a limiting groove rail disposed within the housing slot; an installation mechanism, including a docking block disposed above the housing slot; and a fixing mechanism, including an elastic pressing assembly disposed above the housing slot, the elastic pressing assembly including a spring and a pressure plate, one end of the spring being connected to the upper surface of the pressure plate. This also fails to solve the above-mentioned technical problems. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a battery cell shell structure, which enables the battery cell to dissipate heat well during operation and solves the problem of poor safety protection.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: a battery cell shell structure, comprising: a box body, the box body having an outer shell and an inner shell, the inner shell being arranged on the inner side of the outer shell, a temperature control solution being provided between the outer shell and the inner shell, and a circulation system for the temperature control solution being also provided.

[0008] The temperature control solution circulation system includes a battery cell liquid inlet and a battery cell liquid outlet provided on the outer shell. The temperature control solution can enter between the outer shell and the inner shell through the battery cell liquid inlet; the temperature control solution between the outer shell and the inner shell can also flow out through the battery cell liquid outlet.

[0009] The bottoms of the outer shell and the inner shell are an integrated structure, and explosion-proof valves are provided at the bottoms of the outer shell and the inner shell.

[0010] A left heating film and a right heating film are further provided on the left and right sides of the outer shell and / or the inner shell.

[0011] The left heating film and the right heating film are detachably connected to the outer shell or the inner shell.

[0012] The battery core liquid inlet and the battery core liquid outlet are arranged opposite to each other on two sides of the outer shell.

[0013] One of the above technical solutions has the following advantages or beneficial effects: it allows the battery cells to dissipate heat effectively during operation, resolving the issue of poor safety protection. It also increases the thermal management efficiency of the battery pack module, reduces the risk of thermal runaway, increases the structural strength of the battery pack module, and improves the safety of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of a battery cell casing structure provided in an embodiment of the present utility model;

[0015] Figure 2 for Figure 1 A schematic structural diagram of a battery cell shell structure;

[0016] The markings in the above figure are: 1. Battery cell liquid inlet, 2. Battery cell liquid outlet, 3. Explosion-proof valve, 4. Temperature control solution, 5. Left heating film, 6. Outer shell, 7. Inner shell, 8. Right heating film. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] See also Figures 1-2 A battery cell shell structure comprises: a box body, the box body having an outer shell and an inner shell, the inner shell being arranged on the inner side of the outer shell, a temperature control solution being arranged between the outer shell and the inner shell, and a circulation system for the temperature control solution being also provided.

[0019] The circulation system of the temperature control solution includes a battery cell liquid inlet and a battery cell liquid outlet arranged on the outer shell. The temperature control solution can enter between the outer shell and the inner shell through the battery cell liquid inlet; the temperature control solution between the outer shell and the inner shell can also flow out through the battery cell liquid outlet.

[0020] The bottoms of the outer shell and the inner shell are an integrated structure, and explosion-proof valves are provided at the bottoms of the outer shell and the inner shell.

[0021] A left heating film and a right heating film are further provided on the left and right sides of the outer shell and / or the inner shell.

[0022] The left heating film and the right heating film are detachably connected to the outer shell or the inner shell.

[0023] The battery cell liquid inlet and the battery cell liquid outlet are arranged opposite to each other on two sides of the outer shell.

[0024] The above structure allows the battery cells to dissipate heat effectively during operation, solving the problem of poor safety protection. It also increases the thermal management efficiency of the battery pack module, reduces the risk of thermal runaway, increases the structural strength of the battery pack module, and improves the safety of the battery pack.

[0025] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "two ends", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A battery cell shell structure, characterized in that: The invention comprises: a box body, wherein the box body comprises an outer shell and an inner shell, wherein the inner shell is arranged on the inner side of the outer shell, a temperature control solution is arranged between the outer shell and the inner shell, and a circulation system for the temperature control solution is also arranged; The temperature control solution circulation system includes a battery cell liquid inlet and a battery cell liquid outlet provided on the outer shell, and the temperature control solution can enter between the outer shell and the inner shell through the battery cell liquid inlet; the temperature control solution between the outer shell and the inner shell can also flow out through the battery cell liquid outlet; The bottom of the outer shell and the inner shell are an integrated structure, and explosion-proof valves are provided at the bottom of the outer shell and the inner shell; A left heating film and a right heating film are further provided on the left and right sides of the outer shell and / or the inner shell.

2. The battery cell casing structure according to claim 1, wherein: The left heating film and the right heating film are detachably connected to the outer shell or the inner shell.

3. The battery cell casing structure according to claim 2, wherein: The battery core liquid inlet and the battery core liquid outlet are arranged opposite to each other on two sides of the outer shell.

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