CN209389174U - A liquid-cooled battery cooling system - Google Patents

Abstract

The utility model provides a kind of liquid cooling battery heat removal system, belongs to liquid cooling battery field of radiating.The liquid cooling battery heat removal system includes battery cell modules and cooling system shell；The battery cell modules include battery unit case, battery case component, heat-conducting glue, battery, " honeycomb " fin, cooling liquid bath and parallel circuit.The heat that battery generates at work sufficiently passes to battery case component by the heat-conducting glue wrapped entirely, while can effectively reduce the temperature difference of battery cell modules different zones, to guarantee that battery is in always among good running environment.Battery case component is attached by " honeycomb " fin one with battery unit case, it is ensured that stability；Two can promote the contact area of battery case component and coolant liquid to greatest extent, maximize its heat dissipation.Liquid circulation flowing is realized by external water pump, to achieve the purpose that rapid cooling.

Description

A liquid-cooled battery cooling system

technical field

The utility model belongs to the field of liquid-cooled battery heat dissipation, in particular to a liquid-cooled battery heat dissipation system.

Background technique

As a power battery, lithium batteries have been gradually applied to various fields of daily life. Especially in recent years, with the rise of the electric vehicle industry, the demand and application scenarios of lithium batteries have also greatly increased. The heat dissipation of lithium batteries is still a technical difficulty, which greatly affects the application of lithium batteries.

The current heat dissipation methods of power batteries are mainly divided into two types: air cooling and liquid cooling: air cooling uses air as a heat transfer medium to directly let air pass through the module to achieve the purpose of cooling and heating. The wind generated by the movement of the car takes the heat of the battery away through the exhaust fan. Its advantages are simple structure, relatively small weight and low cost, but it is difficult to solve the actual heat dissipation problem because of its slow cooling and heating speed; liquid heat conduction High efficiency can easily meet the heat dissipation requirements of the power battery and perform well in ensuring the consistency of module temperature. Liquid cooling is to exchange heat between the liquid and the outside air to send out the heat generated by the battery pack. There are two main ways to achieve this: one is to arrange heat transfer tubes, jackets, etc. around the battery module, and the other is to directly place the battery module Immersed in a dielectric heat transfer fluid and insulated to prevent short circuits. However, the disadvantages of the current liquid cooling method are technical difficulty, complex structure, and high difficulty in repair and maintenance.

Among the current heat dissipation methods for power batteries, air cooling has a simple structure and relatively small weight, but its heat dissipation efficiency is low and the temperature difference between different areas of the module is large. The high heat dissipation efficiency of liquid cooling has greater development prospects in the heat dissipation of power batteries. However, the current liquid cooling heat dissipation efficiency is still not ideal, and there is still a lot of room for optimization. For example, the current liquid cooling system has a complex structure and is difficult to maintain. Especially in terms of heat dissipation contact area, there is still a lot of room for optimization.

Utility model content

The purpose of the utility model is to improve the heat dissipation efficiency of the power storage battery by maximizing the heat conduction contact area of the liquid cooling heat dissipation, thereby designing a liquid cooling battery heat dissipation system with more efficient heat dissipation and smaller temperature differences between different regions.

Technical scheme of the utility model:

A liquid-cooled battery heat dissipation system, the liquid-cooled battery heat dissipation system includes a battery unit module 1 and a heat dissipation system housing 2; 6. "Honeycomb" fins 7, coolant tank 8 and parallel circuit 9;

The battery unit modules 1 are closely arranged in the heat dissipation system casing 2, and the number of the battery unit modules 1 is determined according to actual needs;

In the battery unit module 1 described above, the battery 6 is connected in a parallel circuit 9; the battery tank member 4 is arranged outside the battery 6, and the thermal conductive glue 5 is filled between the battery 6 and the battery tank member 4 to ensure that the heat energy of the battery 6 It is fully transmitted to the battery container member 4; the battery container member 4 in the same battery cell module 1 is covered with a battery cell casing 3; a "honeycomb" fin 7 is arranged between the battery container member 4 and the battery cell casing 3, Different "honeycomb" fins 7, battery tank components 4, and battery cell casings 3 form a honeycomb-shaped coolant tank 8 in cross-section. The coolant tank 8 is filled with coolant and connected to an external water pump to ensure Coolant circulation.

The battery tank member 4 and the "honeycomb" fins 7 are made of aluminum alloy.

The heat dissipation system casing 2 and the battery unit casing 3 are made of aluminum alloy.

The material of the thermally conductive adhesive 5 is silica gel, which is doped with thermally conductive and non-conductive metal oxide powder particles, that is, metal oxide thermally conductive silica gel.

The cooling liquid is ethylene glycol cooling liquid or propylene glycol cooling liquid.

Working principle: The heat generated by the battery 6 during operation is fully transferred to the battery slot member 4 through the all-encompassing heat-conducting adhesive 5, and at the same time, it can effectively reduce the temperature difference between different areas of the battery unit module 1, so as to ensure that the battery 6 is always in good condition. in the operating environment. The "honeycomb" fins 7 firstly connect the battery tank member 4 with the battery unit housing 3 to ensure stability; secondly, they can maximize the contact area between the battery tank member 4 and the cooling liquid to maximize the heat dissipation efficiency. The liquid circulation is realized by an external water pump to achieve the purpose of rapid heat dissipation.

Beneficial effects of the utility model: the upper and lower semicircular structural parts fully cover several "18650 type" batteries, the battery and the structural parts are filled with heat-conducting glue, and the "honeycomb" fin design can connect aluminum alloy parts with The heat conduction area between liquids is increased several times.

Description of drawings

Figure 1 is a schematic diagram of a liquid-cooled battery cooling system.

Figure 2 is a structural diagram of the battery unit module.

In the figure: 1 battery unit module; 2 heat dissipation system shell; 3 battery unit shell; 4 battery slot member; 5 thermal conductive glue; 6 battery;

Detailed ways

The technical solution of the present utility model will be further described below in combination with specific embodiments and accompanying drawings.

A liquid-cooled battery heat dissipation system, as shown in FIG. 1 , the liquid-cooled battery heat dissipation system is composed of several battery unit modules 1 , and the several battery unit modules 1 are wrapped in a heat dissipation system shell 2 to form a whole. The battery cell module 1 includes a battery cell casing 3, a battery slot member 4, a thermally conductive glue 5, a battery 6, a "honeycomb" fin 7, a cooling liquid tank 8 and a parallel circuit 9; FIG. 2 is a battery cell module 1 Detailed explanation of the structure.

In the battery unit module 1 described above, the battery 6 is connected in a parallel circuit 9; the battery tank member 4 is arranged outside the battery 6, and the thermal conductive glue 5 is filled between the battery 6 and the battery tank member 4 to ensure that the heat energy of the battery 6 It is fully transmitted to the battery container member 4; the battery container member 4 in the same battery cell module 1 is covered with a battery cell casing 3; a "honeycomb" fin 7 is arranged between the battery container member 4 and the battery cell casing 3, Different "honeycomb" fins 7, battery tank components 4, and battery cell casings 3 form a honeycomb-shaped coolant tank 8 in cross-section. The coolant tank 8 is filled with coolant and connected to an external water pump to ensure Coolant circulation.

The battery tank component 4 is composed of upper and lower semicircular structural parts, and the model of the battery 6 is "18650 model"; the material of the heat dissipation system shell 2 and the battery unit shell 3 is aluminum alloy. The material of the thermally conductive adhesive 5 is silica gel, which is doped with thermally conductive and non-conductive metal oxide powder particles, that is, metal oxide thermally conductive silica gel.

The cooling liquid is propylene glycol cooling liquid.

Claims (8)

1. A liquid-cooled battery cooling system, characterized in that the liquid-cooled battery cooling system includes a battery unit module (1) and a cooling system housing (2); the battery unit module (1) includes a battery unit housing (3), battery tank member (4), thermal conductive glue (5), battery (6), honeycomb fins (7), cooling liquid tank (8) and parallel circuit (9); The battery unit modules (1) are closely arranged in the heat dissipation system casing (2), and the number of battery unit modules (1) is determined according to actual needs; In the battery unit module (1), the battery (6) is connected in a parallel circuit 9; the battery (6) is provided with a battery tank member (4), and the battery (6) and the battery tank member (4) Fill the gap with heat-conducting glue (5) to ensure that the heat of the battery (6) can be fully transferred to the battery slot member (4); the battery slot member (4) in the same battery unit module (1) uses a battery unit case (3 ) coating; honeycomb fins (7) are arranged between the battery tank member (4) and the battery cell case (3), and different honeycomb fins (7), battery case members (4), battery cell case (3 ) form a honeycomb-shaped cooling liquid tank (8) in cross section, which is filled with cooling liquid and connected with an external water pump to ensure the circulating flow of cooling liquid. 2. A heat dissipation system for a liquid-cooled battery according to claim 1, characterized in that the battery tank member (4) and the honeycomb fins (7) are made of aluminum alloy. 3. A heat dissipation system for a liquid-cooled battery according to claim 1 or 2, characterized in that the heat dissipation system housing (2) and the battery unit housing (3) are made of aluminum alloy. 4. A heat dissipation system for a liquid-cooled battery according to claim 1 or 2, characterized in that the heat-conducting glue (5) is metal oxide heat-conducting silica gel. 5. A heat dissipation system for a liquid-cooled battery according to claim 3, characterized in that the heat-conducting glue (5) is metal oxide heat-conducting silica gel. 6. A heat dissipation system for a liquid-cooled battery according to claim 1, 2 or 5, wherein the cooling liquid is ethylene glycol cooling liquid or propylene glycol cooling liquid. 7. The heat dissipation system for liquid-cooled batteries according to claim 3, wherein the cooling liquid is ethylene glycol cooling liquid or propylene glycol cooling liquid. 8 . The heat dissipation system for a liquid-cooled battery according to claim 4 , wherein the cooling liquid is ethylene glycol cooling liquid or propylene glycol cooling liquid.