CN206432354U - A kind of electric automobile power battery water-cooling system and use its electric automobile - Google Patents

Abstract

The utility model relates to the technical field of electric vehicles, in particular to an electric vehicle power battery water cooling system and an electric vehicle using the water cooling system. The electric vehicle power battery water cooling system includes a water-cooled plate assembly, which is fixed between adjacent battery modules and exchanges heat with the battery modules. At the same time, an electric vehicle adopting the above-mentioned water-cooling system is also provided. In the utility model, a water-cooled plate assembly is arranged between adjacent battery modules to cool down the battery modules, which improves the heat dissipation efficiency of the battery modules and makes the battery temperature have better consistency.

Description

Water cooling system for power battery of electric vehicle and electric vehicle using same

technical field

The utility model relates to the technical field of electric vehicles, in particular to an electric vehicle power battery water cooling system and an electric vehicle using the water cooling system.

Background technique

As the core component of a pure electric vehicle, the performance of a power battery will directly affect the performance of a pure electric vehicle. In order to meet the mileage requirements of electric vehicles and achieve a predetermined voltage and capacity, multiple lithium-ion batteries need to be connected in series and parallel to form a power battery module; a certain number of modules are connected in series to form a circuit. Since the module installation space reserved in pure electric vehicles is mostly small and irregular in shape, the battery core heats up during battery operation, and the temperature rise and imbalance between single cells and modules will affect battery performance. The consistency of the battery and the accuracy of the battery state of charge estimation will affect the system control of the electric vehicle.

Specifically, as described below, there are the following technical defects in the prior art:

(1) Traditional pure electric vehicle power batteries are mostly cooled by natural cooling or air cooling. The cooling efficiency of the natural cooling method is low, and it is difficult to achieve the ideal cooling effect in the position where the heat gathers inside the module; although the effect of the air cooling method is improved compared with the natural cooling method, the cooling effect on the heat concentrated parts between the modules is also not good. , and because of the structural characteristics of the air-cooled components, it is difficult for the battery box to achieve a high IP protection level.

(2) In the power battery box, the modules are densely arranged in a limited space. Due to the poor cooling effect of natural cooling and air cooling, the heat accumulated by the modules in the central area will inevitably be much more than that of the surrounding modules, which is difficult Maintain the consistency of the cell temperature. The temperature imbalance will eventually affect the consistency of the cell performance and the accuracy of the cell state of charge (SOC) estimation, which will also have a great adverse effect on the life of the entire battery pack. .

In view of the above problems, an electric vehicle power battery water cooling system and an electric vehicle using it are proposed, which can solve the problem of poor heat dissipation of the existing battery modules.

Utility model content

The purpose of the utility model is to provide a water cooling system for electric vehicle power batteries, which can solve the problem of poor heat dissipation effect of the existing battery modules.

Another object of the present utility model is to provide an electric vehicle, which includes the electric vehicle power battery water cooling system as described above.

For this purpose, the utility model adopts the following technical solutions:

A water cooling system for a power battery of an electric vehicle includes a water cooling plate assembly, the water cooling plate assembly is fixed between adjacent battery modules and exchanges heat with the battery modules.

As a preferred solution of the electric vehicle power battery water cooling system, heat conduction components are arranged on both sides of the water cooling plate assembly, and heat exchange is performed with the battery module through the heat conduction components.

As a preferred solution of the water cooling system for the electric vehicle power battery, the heat conduction component is a silicone heat conduction pad, and one side of the silicone heat conduction pad is attached to the water cooling plate assembly, and the other side is attached to the battery module.

As a preferred solution of the water-cooling system for the electric vehicle power battery mentioned above, the water-cooled plate assembly is provided with water-cooled plate limit blocks on the upper and lower sides of the end, and the water-cooled plate limit block is used to limit the water-cooled plate assembly to prevent its Moving up and down;

The limiting block of the water cooling plate is fixedly connected with the module end plates of the battery modules located on both sides thereof.

As a preferred solution of the water-cooling system for the electric vehicle power battery, the water-cooled plate limit block and the module end plate are both provided with coaxially distributed through-hole structures, and the water-cooled plate limit block is passed through the through-hole structure. The long bolts in the hole structure are fixedly connected with the module end plate.

As a preferred solution of the water-cooling system for the power battery of the above-mentioned electric vehicle, the end of the water-cooled plate limit block is attached to the end plate of the module, and the water-cooled plate assembly and the battery module are adjusted by adjusting the length of the water-cooled plate limit block. The degree of fit of the group.

As a preferred solution of the electric vehicle power battery water cooling system, it includes a plurality of water cooling plate assemblies, and the plurality of water cooling plate assemblies are connected through pipes to form a water circulation system.

As a preferred solution of the water-cooling system for the power battery of an electric vehicle, the inside of the water-cooling plate assembly includes a plurality of channels parallel to each other.

An electric vehicle includes a battery module, and the water cooling system for the power battery of the electric vehicle as described above is included between the battery modules.

As a preferred solution of the above-mentioned electric vehicle, it further includes a battery box, and the battery module is arranged in the battery box.

The beneficial effects of the utility model are as follows: in the utility model, a water-cooled plate assembly is arranged between adjacent battery modules to cool down the battery modules, improve the heat dissipation efficiency of the battery modules, and make the battery temperature have a better consistency.

Description of drawings

Fig. 1 is a schematic structural view of the electric vehicle power battery water cooling system provided by the specific embodiment of the utility model;

Fig. 2 is a schematic diagram of an exploded state of the electric vehicle power battery water cooling system provided by the specific embodiment of the present invention.

in:

1: Water cooling plate assembly; 2: Battery module; 3: Silicone thermal pad; 4: Limiting block of water cooling plate; 5: Module end plate; 6: Long bolt.

detailed description

The technical scheme of the utility model will be further described below in conjunction with the accompanying drawings and through specific embodiments.

As shown in Figures 1 and 2, this embodiment provides a water cooling system for electric vehicle power batteries, which includes a water cooling plate assembly 1, and the water cooling plate assembly 1 is fixed between adjacent battery modules 2 and connected to the battery module 2 for heat exchange.

In this embodiment, the water-cooled plate assembly 1 is arranged between adjacent battery modules 2 to cool down the battery modules 2, thereby improving the heat dissipation efficiency of the battery modules 2 and making the battery temperature more consistent.

In order to improve the heat transfer efficiency between the water-cooled plate assembly 1 and the battery module 2 , heat conduction components are arranged on both sides of the water-cooled plate assembly 1 , and exchange heat with the battery module 2 through the heat conduction components.

Specifically, the heat conduction component is a silicone heat conduction pad 3 , one side of the silicone heat conduction pad 3 is bonded to the water cooling plate assembly 1 , and the other side is bonded to the battery module 2 .

The upper and lower sides of the end of the water-cooled plate assembly 1 are provided with water-cooled plate limiting blocks 4, which are used to limit the water-cooled plate assembly 1 and prevent it from moving up and down. The module end plates 5 of the battery modules 2 on both sides are fixedly connected. The upper and lower positions of the water-cooled plate assembly 1 are limited by the water-cooled plate limit block 4, and the left and right positions of the water-cooled plate assembly 1 are limited by the clamping action of the battery module 2, which improves the stability of the installation of the water-cooled plate assembly 1, And it has the advantage of convenient installation.

The specific installation method of the water-cooled plate limit block 4 is as follows:

Both the water-cooled plate limit block 4 and the module end plate 5 are provided with a coaxially distributed through-hole structure, and the water-cooled plate limit block 4 is fixedly connected to the module end plate 5 through the long bolts 6 pierced in the through-hole structure .

Specifically, the end of the water-cooled plate limiting block 4 is attached to the module end plate 5 , and the degree of bonding between the water-cooled plate assembly 1 and the battery module 2 is adjusted by adjusting the length of the water-cooled plate limiting block 4 . That is, it is possible to adjust the length of the water-cooled plate stopper 4 and the distance before the battery module 1 according to actual needs, and then adjust the bonding degree between the water-cooled plate assembly 1 and the battery module 2 . The degree of bonding between the water-cooled plate assembly 1 and the battery module 2 is different, and the two also have different heat dissipation efficiencies.

The electric vehicle power battery water cooling system includes a plurality of water cooling plate assemblies 1, and the plurality of water cooling plate assemblies 1 are connected through pipes to form a water circulation system. It should be noted that the battery module 2 is not limited to a certain type of batteries and modules with a certain number of strings.

During the working process of the water-cooling system, the coolant circulates through the entire water-cooling system to achieve cooling in the battery box and improve the balance of battery core temperature and consistency of performance.

The inside of the water-cooled plate assembly 1 includes a plurality of channels parallel to each other. On the one hand, it increases the pressure in the water-cooled plate assembly 1 , and on the other hand, it is also beneficial to ensure that the temperature of each part of the water-cooled plate is consistent and improve the cooling effect.

In this embodiment, an electric vehicle is also provided, which includes a battery module 2, and the water cooling system for the power battery of the electric vehicle as described above is included between the battery modules 2.

The electric vehicle includes a battery box, and the battery module 2 is arranged in the battery box.

To sum up, the above water cooling system for electric vehicle power battery has the following advantages:

(1) The circulation system composed of the water-cooled plate assembly 1 is connected to realize active cooling of the power battery box, which improves the cooling efficiency in the power battery box.

(2) Uniform heat transfer can be achieved between the water-cooled plate assembly 1 and the battery module 2 through the silica gel heat conduction pad 3 , which improves the heat transfer efficiency between the battery module 2 and the water-cooled plate assembly 1 .

(3) The water cooling plate assembly 1 and the battery module 2 are connected through the long bolts 6 between the end plates 5 of the module, so it is easy to realize the water cooling system for different types of battery modules 2 .

(4) The cooling circulation system formed by the combination and communication of multiple water-cooled plate assemblies 1 in the battery box can greatly improve the temperature consistency among the battery cells, which is beneficial to prolong the service life of the power battery.

The technical principles of the present utility model have been described above in conjunction with specific embodiments. These descriptions are only for explaining the principles of the present utility model, and cannot be construed as limiting the protection scope of the present utility model in any way. Based on the explanations herein, those skilled in the art can think of other specific implementation modes of the present utility model without creative work, and these modes will all fall within the protection scope of the present utility model.

Claims (8)

1. a kind of electric automobile power battery water-cooling system, it is characterised in that including water cooling board component (1), the cooled plate group Part (1) is fixed between adjacent cell module (2), and carries out heat exchange with battery modules (2)；

Both sides are provided with cooled plate limited block (4) above and below the end of the water cooling board component (1), and cooled plate limited block (4) is used In the spacing of water cooling board component (1), prevent it from moving up and down；

The cooled plate limited block (4) is fixedly connected with the module end plate (5) of the battery modules (2) positioned at its both sides；

The through-hole structure being coaxially distributed, the cooled plate limit are provided with the cooled plate limited block (4) and module end plate (5) Position block (4) is fixedly connected by the stay bolt (6) being located in through-hole structure with module end plate (5).

2. electric automobile power battery water-cooling system according to claim 1, it is characterised in that the water cooling board component (1) both sides are provided with termal conductor module, and carry out heat exchange by termal conductor module and battery modules (2).

3. electric automobile power battery water-cooling system according to claim 2, it is characterised in that the termal conductor module is Silica gel heat conductive pad (3), the side of the silica gel heat conductive pad (3) is fitted with water cooling board component (1), and opposite side is pasted with battery modules (2) Close.

4. electric automobile power battery water-cooling system according to claim 1, it is characterised in that the cooled plate limited block (4) end fits with module end plate (5), and by adjusting the length adjustment water cooling board component (1) of cooled plate limited block (4) With the laminating degree of battery modules (2).

5. electric automobile power battery water-cooling system according to claim 1, it is characterised in that including multiple cooled plate groups By pipeline communication between part (1), the multiple water cooling board component (1), and form water circulation system.

6. electric automobile power battery water-cooling system according to claim 1, it is characterised in that the water cooling board component (1) it is internal to include a plurality of passage being parallel to each other.

7. include such as claim between a kind of electric automobile, it is characterised in that including battery modules, the battery modules (2) Electric automobile power battery water-cooling system described in 1-6 any one.

8. electric automobile according to claim 7, it is characterised in that also including battery case, the battery modules (2) are set In battery case.