Heat dissipation and heat preservation detachable combined box body for lithium ion battery pack

Abstract

The utility model discloses a detachable heat dissipation and heat preservation combined box body for a lithium ion battery pack, which belongs to the technical field of heat management and comprises a square battery pack bottom plate for mounting the battery pack. The battery pack panel is installed on the battery pack bottom plate and forms one side face, the heat preservation shell is independently arranged and forms the other three side faces and the top face of the box body, the heat dissipation shell is independently arranged and forms the other three side faces and the top face of the box body, and the polyimide heating film is used for being pasted to the surface of a battery module. The heat preservation shell is detachably mounted on the battery pack bottom plate; the heat dissipation shell is detachably installed on the battery pack bottom plate, a plurality of heat dissipation fans are installed on the side, opposite to the battery pack panel, of the shell, and air outlets are formed in the two sides, adjacent to the battery pack panel, of the shell respectively. The combined box body can meet the requirements of heat dissipation and heat preservation of the battery pack under different working conditions.

Description

Technical Field

[0001] The utility model belongs to the technical field of thermal management of lithium ion batteries, and in particular relates to a detachable combined box for heat dissipation and heat preservation of lithium ion battery packs during testing and actual use. Background Art

[0002] In recent years, lithium-ion batteries have been widely used in electric vehicles, power tools, aerospace and other fields due to their advantages such as high specific energy, good cycle stability, low self-discharge, no memory effect and green environmental protection. In addition, in the field of civil aviation, lithium batteries have become an advantageous option for electric power storage of new civil aircraft because they help reduce aircraft empty weight, noise and environmental pollution. Temperature is a key factor in the safe operation of lithium-ion batteries. Once a thermal runaway disaster occurs, it is very easy to cause casualties.

[0003] At present, power battery thermal management systems include active and passive types. Active thermal management includes air cooling, liquid cooling, and refrigerant cooling; passive thermal management includes natural cooling and heat pipe cooling. Due to product weight restrictions, the aerospace field generally uses natural cooling or forced air cooling. According to the use background of the power battery pack, the battery pack needs to dissipate heat during the ground test phase, but during the actual use of the product, there will be low temperature conditions, so it is necessary to balance the heat dissipation and insulation functions of the power battery pack. Utility Model Content

[0004] The utility model aims to provide a detachable heat dissipation and heat preservation combined box for lithium-ion battery packs, so as to solve the balance problem of cooling and heat preservation functions of power battery packs mentioned in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a detachable combined box for heat dissipation and heat preservation of a lithium-ion battery pack, comprising a square battery pack bottom plate for installing the battery pack, a battery pack panel installed on the battery pack bottom plate to form one side, a separately arranged thermal insulation shell forming the other three side surfaces and the top surface of the box, a separately arranged heat dissipation shell forming the other three side surfaces and the top surface of the box, and a polyimide heating film pasted on the surface of the battery module; the thermal insulation shell is detachably mounted on the battery pack bottom plate; the heat dissipation shell is detachably mounted on the battery pack bottom plate, a plurality of heat dissipation fans are installed on the shell on the side opposite to the battery pack panel, and air outlets are respectively provided on the shells on both sides adjacent to the battery pack panel.

[0006] The polyimide heating film is adhered to the surface of the battery module using silica gel or epoxy glue.

[0007] There are 4 cooling fans.

[0008] An electrical connector is installed on the battery pack panel.

[0009] The battery pack bottom plate is provided with a battery pack external installation interface.

[0010] The beneficial effects of the present invention are: a cooling fan is installed on the heat dissipation shell, and air outlets are opened on both sides to dissipate heat during ground testing of the power battery pack and maintain the internal lithium-ion battery in a suitable temperature range. The insulation shell material is CascellWH 110 foam. The foam has a low thermal conductivity, which meets the insulation function of the power battery pack, and the surface of the battery module is covered with a polyimide heating film, which is used to heat the battery module under low temperature conditions. The foam is light in weight, which meets the weight reduction requirements of the power battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of a detachable combined box for heat dissipation and heat preservation of a lithium-ion battery pack of the utility model;

[0012] Figure 2 It is a schematic diagram of the structure of the thermal insulation shell of the utility model after installation;

[0013] Figure 3 This is a schematic diagram of the structure of the heat dissipation housing of the utility model after installation

[0014] In the figure: 1. Insulation shell; 2. Heat dissipation shell; 3. Polyimide heating film; 4. Battery pack bottom plate; 5. Battery pack panel. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0016] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating directions or positional relationships, are based on the directions or positional relationships 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0017] In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features.

[0018] Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention, unless otherwise specified, "plurality" means two or more.

[0019] In the description of the invention of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention of the utility model can be understood according to specific circumstances.

[0020] The electrical devices, controllers, etc. described in the present invention are all conventionally configured, and the electrical connection method is also conventionally connected.

[0021] like Figure 1 As shown, the heat dissipation and heat preservation detachable combined box for lithium-ion battery packs of the present invention comprises a square battery pack bottom plate 4 for installing the battery pack, a battery pack panel 5 installed on the battery pack bottom plate 4 to form one side, a separately arranged heat preservation shell 1 forming the other three side surfaces and the top surface of the box, a separately arranged heat dissipation shell 2 forming the other three side surfaces and the top surface of the box, and a polyimide heating film 3 pasted on the surface of the battery module; the heat preservation shell 1 is CascellWH 110 foam and is detachably installed on the battery pack bottom plate 4; the heat dissipation shell 2 is detachably installed on the battery pack bottom plate 4, and a plurality of heat dissipation fans 6 are installed on the shell on the side opposite to the battery pack panel 5, and air outlets 7 are respectively opened on the shells on both sides adjacent to the battery pack panel 5.

[0022] Preferably, the polyimide heating film 3 is adhered to the surface of the battery module using silica gel or epoxy glue.

[0023] Preferably, the number of the cooling fans 6 is 4.

[0024] An electrical connector is installed on the battery pack panel 5 .

[0025] The battery pack bottom plate is provided with a battery pack external installation interface.

[0026] like Figure 2As shown, the insulation shell 1 is installed on the bottom plate of the battery pack. Its material is CascellWH 110 foam, which has a low thermal conductivity and can provide an insulation environment for the internal battery pack. At the same time, the CascellWH 110 foam material is light in weight and can also meet the weight reduction requirements of the power battery pack. When the power battery pack is used at high altitude, the insulation shell can be used. The polyimide heating film 3 is attached to the surface of the battery module using silicone or epoxy glue, and the power of the heating film is designed according to different working conditions.

[0027] like Figure 3 As shown, the heat dissipation housing 2 is installed on the bottom plate of the battery pack, and 4 heat dissipation fans are installed on the housing. At the same time, air outlets are opened on both sides of the housing for heat dissipation of the power battery pack. When the power battery pack is tested on the ground, the heat exchange between the inside of the battery pack and the outside is weak, and a heat dissipation housing can be used.

[0028] When the battery pack is being tested on the ground, the heat dissipation shell is installed on the battery bottom plate, and the fan on the heat dissipation shell is turned on to dissipate heat for the battery pack; when the battery pack needs to be tested or used at high altitude, the heat preservation shell is installed on the battery bottom plate, and the polyimide heating film pasted inside is turned on to keep the battery pack warm and heated.

[0029] The above description is only 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 in the protection scope of the present invention.

Claims

1. A detachable combined box for heat dissipation and heat preservation of lithium-ion battery packs, characterized in that: The invention comprises a square battery pack base plate (4) for mounting a battery pack, a battery pack panel (5) mounted on the battery pack base plate (4) and constituting one side surface, a heat-insulating outer shell (1) separately arranged to constitute the other three side surfaces and the top surface of the box body, a heat-dissipating outer shell (2) separately arranged to constitute the other three side surfaces and the top surface of the box body, and a polyimide heating film (3) for being adhered to the surface of the battery module; the heat-insulating outer shell (1) is detachably mounted on the battery pack base plate (4); the heat-dissipating outer shell (2) is detachably mounted on the battery pack base plate (4), a plurality of heat-dissipating fans (6) are mounted on the outer shell on the side opposite to the battery pack panel (5), and air outlets (7) are respectively provided on the two side shells adjacent to the battery pack panel (5).

2. The heat dissipation and heat preservation detachable combined box for lithium-ion battery pack according to claim 1, characterized in that: The polyimide heating film (3) is adhered to the surface of the battery module using silica gel or epoxy glue.

3. The heat dissipation and heat preservation detachable combined box for lithium-ion battery pack according to claim 1, characterized in that: There are four cooling fans (6).

4. The heat dissipation and heat preservation detachable combined box for lithium-ion battery pack according to claim 1, characterized in that: An electrical connector is installed on the battery pack panel (5).

5. The heat dissipation and heat preservation detachable combined box for lithium-ion battery pack according to claim 1, characterized in that: The battery pack bottom plate is provided with a battery pack external installation interface.

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