CN206401474U - A cooling device for a lithium battery pack - Google Patents

Abstract

The utility model discloses a lithium battery pack heat abstractor, including gasket and backing plate, each other become 90 quadrature between gasket and the backing plate, and form the battery case intermediate layer between gasket and backing plate, the inside battery of putting that is used for of battery case intermediate layer, it is fixed through pasting the area between adjacent gasket and the battery case intermediate layer, battery case intermediate layer bottom is located to the backing plate, and has heat radiation fins at the bottom fixed mounting of gasket, connects through the mutual interlock of heat radiation fins between the adjacent gasket, still is equipped with the heat conduction silica gel layer between backing plate and battery case intermediate layer, heat conduction silica gel layer below is fixed mounting still has the heat pipe, adopts semi-enclosed structure, can prevent on the one hand that the dust from getting into inside the battery, and on the other hand can improve heat-.

Description

A cooling device for a lithium battery pack

technical field

The utility model relates to the technical field of battery packs, in particular to a cooling device for lithium battery packs.

Background technique

Lithium batteries are widely used in various occasions due to their excellent characteristics such as large capacity, stable voltage, and strong sustainability. Conventional batteries can only drive electrical appliances with small power because of their small voltage and current. Large-scale electrical appliances and even equipment cannot be driven normally. For example, electric vehicles that are currently being researched very hotly require very powerful batteries to be able to drive them, but the current single battery is far from meeting the relevant requirements. Therefore, connecting batteries in series to form a battery pack can perfectly solve the current problems. The heat generated by a conventional single battery can be discharged through natural conditions without further steps. However, when multiple batteries are combined to form a battery pack It is necessary to consider the heat generated by the battery. At present, in order to ensure the stability of the battery pack application and other performance requirements, the connection between the battery packs is very tight. When the highly compact batteries are aggregated to form a battery pack, the internal It is difficult to effectively remove the electric heat of the battery. When a large amount of heat accumulates, on the one hand, it will increase the internal resistance of the battery, generate more heat, and form a vicious circle. On the other hand, the battery will work under high temperature conditions for a long time. It is difficult to effectively exert its own performance. In the long run, the internal structure of the battery itself will be affected and the performance of the battery will be reduced.

At present, in order to solve this kind of problem, an additional heat dissipation device is often used. The heat dissipation device currently used adopts a fully enclosed structure, which is to prevent dust from entering the inside of the battery, and then uses a heat dissipation structure to dissipate heat. For large battery packs, it can meet the needs of use, but for large battery packs, the fully enclosed structure is far from meeting the actual needs. Then, for this type of situation, it is necessary to develop a new battery cooling system. device, but also need to take into account the role of dust and so on.

Utility model content

In view of the above problems, the utility model provides a lithium battery pack cooling device, which adopts a semi-closed structure, which can prevent dust from entering the inside of the battery on the one hand, and can greatly improve the heat dissipation capacity on the other hand, which can effectively solve the problems in the background technology .

In order to achieve the above object, the utility model provides the following technical solutions: a lithium battery pack cooling device, including a gasket and a backing plate, the gasket and the backing plate are 90° orthogonal to each other, and between the gasket and the backing plate A battery box interlayer is formed between the backing plates, and the inside of the battery box interlayer is used for placing batteries. Adjacent gaskets and battery box interlayers are fixed by adhesive tapes. Heat dissipation fins are fixedly installed at the bottom of the battery case, and adjacent gaskets are interlocked and connected by heat dissipation fins. A heat-conducting silica gel layer is also provided between the backing plate and the interlayer of the battery box, and a heat-conducting silica gel layer is fixedly installed under the heat-conducting silica gel layer. heat pipe.

As a preferred technical solution of the present invention, the distance between the gasket and the backing plate is 1/2 of the height of the gasket.

As a preferred technical solution of the present utility model, the gasket is made of TP080/H35-10 thermally conductive silica gel, the thermally conductive silica gel layer is composed of TP12CR/H15-T1C thermally conductive silica gel, and the backing plate is 6063- Composed of T5 heat dissipation aluminum plate.

As a preferred technical solution of the utility model, the battery box interlayers are parallel to each other, and the distance between adjacent battery box interlayers is the thickness of the gasket.

As a preferred technical solution of the present invention, the number of adhesive tapes between each group of pads is two groups, and each group of adhesive tapes is parallel to each other.

As a preferred technical solution of the present invention, the number of the heat conduction pipes is two, and each heat conduction pipe is arranged in a U shape.

As a preferred technical solution of the present invention, the distances between the heat-conducting silica gel layer, the heat-conducting pipe and the bottom plate are respectively 0.1mm and 0.2mm, and the heat-conducting silica gel layer and the backing plate are supported by the heat-conducting pipe.

Compared with the prior art, the beneficial effect of the utility model is: the lithium battery pack cooling device, by setting the gasket and the backing plate, and the interlayer of the battery box is formed orthogonally between the gasket and the backing plate, the adjacent backing plate The distance between them is only two battery box interlayers, and the semi-closed pores between the battery box interlayers are conducive to heat transfer to the backing plate, and then dissipated through the heat-conducting silicone layer and heat pipe on the backing plate. The cooling fins are used to enhance the heat dissipation, and the stable connection can be realized through the bite of the cooling fins, so as to achieve the spatial three-dimensional combination of multiple battery packs.

Description of drawings

Fig. 1 is a structural representation of the utility model;

In the figure: 1-gasket; 2-backing plate; 3-battery box interlayer; 4-adhesive tape; 5-radiating fins; 6-thermal silicone layer; 7-heat pipe.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Example:

Please refer to Fig. 1, the utility model provides a technical solution: a lithium battery pack cooling device, including a gasket 1 and a backing plate 2, the gasket 1 and the backing plate 2 are 90° orthogonal to each other, And a battery box interlayer 3 is formed between the gasket 1 and the backing plate 2, the inside of the battery box interlayer 3 is used to put batteries, and the adjacent gasket 1 and the battery box interlayer 3 are fixed by an adhesive tape 4, and the pad The board 2 is located at the bottom of the interlayer 3 of the battery box, and the bottom of the spacer 1 is fixedly equipped with heat dissipation fins 5 , and adjacent spacers 1 are interlocked and connected with each other through the heat dissipation fins 5 . There is also a heat-conducting silica gel layer 6 between the 3, and a heat-conducting pipe 7 is fixedly installed under the heat-conducting silica gel layer 6.

Preferably, the distance between the gasket 1 and the backing plate 2 is 1/2 the height of the gasket, providing a semi-closed structure between the same layer of battery packs; the gasket 1 is made of TP080/H35-10 thermally conductive silica gel The heat-conducting silica gel layer 6 is composed of TP12CR/H15-T1C type heat-conducting silica gel, the backing plate 2 is composed of 6063-T5 heat-dissipating aluminum plate; the battery box interlayers 3 are parallel to each other, and the adjacent battery box interlayers The distance between 3 is the thickness of gasket 1, which provides a stable semi-closed structure; the number of adhesive tapes 4 between each group of gaskets 1 is two groups, and each group of adhesive tapes 4 is parallel to each other to ensure that they are The stability of the adjacent battery pack and the gasket 1; the number of the heat pipes 7 is two, and each heat pipe 7 is arranged in a U shape to strengthen the convection of hot air; the heat-conducting silica gel layer 6, the heat pipe 7 and the backing plate The distances between 2 are 0.1 mm and 0.2 mm respectively, and the heat-conducting silica gel layer 6 and the bottom plate 2 are supported by the heat-conducting pipe 7 .

It should be emphasized that in the present utility model, the inside of the heat pipe 7 can be connected to an external cold source for further cooling purposes. The specific operation method is to connect the two ends of any heat pipe 7 to form a closed cold source circuit. In order to achieve a more efficient heat dissipation effect, when there is no need to connect to an external cold source, it is not necessary to connect the two ends of the heat pipe 7, and it can be connected to the outside air naturally, and can efficiently dissipate heat through air heat convection.

The utility model has the advantages that: the heat dissipation device for the lithium battery pack is provided with gaskets and backing plates, and the interlayer of the battery box is formed orthogonally between the gaskets and the backing plates, and the distance between adjacent backing plates is only two batteries The interlayer of the battery box, and the semi-closed pores between the interlayers of the battery box are conducive to heat transfer to the backing plate, and then dissipated through the heat-conducting silicone layer and heat pipe on the backing plate, and the heat dissipation fins are used between adjacent backing plates to enhance The heat is dissipated, and the stable connection can be realized through the bite of the cooling fins, so as to achieve the spatial three-dimensional combination of multiple battery packs.

The working principle of the utility model: the heat generated by the battery pack first gathers in the semi-enclosed space formed by the gasket, and then transfers the heat to the backing plate through heat convection in the semi-enclosed space, and the heat-conducting silica gel layer on the backing plate expands the heat To the plane, and dissipate the heat through the heat pipe, and the heat on the backing plane and the heat pipe can be further dissipated through the heat dissipation fins.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (7)

1. a kind of lithium battery pack heat dissipation device, it is characterised in that：Including pad（1）And backing plate（2）, the pad（1）With Backing plate（2）Between it is mutually in 90 ° orthogonal, and in pad（1）And backing plate（2）Between formed battery case interlayer（3）, the battery case folder Layer（3）Inside is used for discharge pond, adjacent pads（1）With battery case interlayer（3）Between pass through adhesive band（4）It is fixed, the backing plate （2）Located at battery case interlayer（3）Bottom, and in pad（1）Bottom be installed with radiating fin（5）, adjacent pad（1） Between pass through radiating fin（5）Connection is mutually twisted, in backing plate（2）With battery case interlayer（3）Between be additionally provided with heat conduction silicone （6）, the heat conduction silicone（6）Lower section is also installed with heat conducting pipe（7）.

2. a kind of lithium battery pack heat dissipation device according to claim 1, it is characterised in that：The pad（1）Distance Backing plate（2）Distance be 1/2 spacer height.

3. a kind of lithium battery pack heat dissipation device according to claim 1, it is characterised in that：The pad（1）Using TP080/H35-10 type heat conductive silica gels are made, the heat conduction silicone（6）Constituted using TP12CR/H15-T1C types heat conductive silica gel, The backing plate（2）Constituted for 6063-T5 heat-dissipating aluminium plates.

4. a kind of lithium battery pack heat dissipation device according to claim 1, it is characterised in that：The battery case interlayer （3）Between be parallel to each other, and adjacent cell box interlayer（3）The distance between be pad（1）Thickness.

5. a kind of lithium battery pack heat dissipation device according to claim 1, it is characterised in that：Every group of pad（1） Between adhesive band（4）Quantity is two groups, and every group of adhesive band（4）Between be parallel to each other.

6. a kind of lithium battery pack heat dissipation device according to claim 1, it is characterised in that：The heat conducting pipe（7）'s Quantity is two, and each heat conducting pipe（7）U-shaped arranged opposite.

7. a kind of lithium battery pack heat dissipation device according to claim 1, it is characterised in that：The heat conduction silicone （6）, heat conducting pipe（7）And backing plate（2）The distance between be respectively 0.1mm and 0.2mm, and heat conduction silicone（6）And bottom plate（2）It is logical Cross heat conducting pipe（7）Support.