CN204857900U - Thermal conduction structure of the battery module - Google Patents

Abstract

The utility model discloses a heat conduction structure of battery module, including battery module and heat transfer unit (HTU), battery module includes a plurality of parallel arrangement's battery cell, the heat transfer unit (HTU) includes heat pipe and liquid cooling board, one section pipeline of heat pipe with battery cell contact, another section pipeline with the liquid cooling board is connected, the liquid cooling board is made for the heat conduction plastic, the utility model discloses a liquid cooling board that uses the heat conduction plastic to make has lightened the weight of liquid cooling board, has improved the portability of battery module, has reduced manufacturing cost.

Description

Thermal conduction structure of the battery module

technical field

The utility model relates to the field of battery systems, in particular to a heat conduction structure of a battery module.

Background technique

As an energy storage device component, the battery is a key component of an electric vehicle. It generates a large amount of heat during charging and discharging, which causes the thermal runaway phenomenon of the single cells inside the battery module, resulting in very serious dissimilarities among the single cells. Balanced temperature distribution, resulting in performance mismatch between single cells, further leading to premature failure of the battery module; currently, the built-in heat pipe battery module can use the heat conduction characteristics of the heat pipe to conduct the heat of the battery to the outside of the battery pack for heat dissipation. To achieve the purpose of reducing the battery temperature and balancing the temperature between the batteries, but the current liquid cooling plate of the built-in heat pipe battery module is made of metal, which makes the weight of the liquid cooling plate heavy, which is not conducive to reducing the weight of the battery module.

Utility model content

The main purpose of the utility model is to provide a heat conduction structure of the battery module, aiming at reducing the weight of the liquid cooling plate and improving the portability of the battery module.

In order to achieve the above purpose, the utility model provides a heat conduction structure of a battery module, including a battery module and a heat transfer device, the battery module includes a number of single batteries arranged in parallel, and the heat transfer device includes a heat pipe and a liquid cold plate One section of the heat pipe is in contact with the single battery, and the other section is connected to the liquid cold plate, and the liquid cold plate is made of heat-conducting plastic.

Preferably, the heat pipe is integrated with the liquid cooling plate.

Preferably, the heat pipe is arranged between the single cells, and one or two single cells are separated between the heat pipes.

Preferably, both ends of the liquid cooling plate are respectively provided with a liquid inlet and a liquid outlet.

Preferably, the heat transfer device further includes a liquid pump and a liquid storage tank, the outlet of the liquid storage tank is connected to the liquid pump and the liquid inlet in turn, and the liquid outlet is connected to the inlet of the liquid storage tank.

Preferably, the heat pipe is flat.

Preferably, the heat pipe is arch-shaped, and both ends are bent inward.

Preferably, the heat pipe is arranged vertically on the liquid cooling plate.

Preferably, the heat pipe is provided with a layer of heat-conducting silica gel.

Preferably, the number of the battery modules is two, and the liquid cooling plate is arranged between the two battery modules.

The utility model reduces the weight of the liquid cold plate by using the liquid cold plate made of heat-conducting plastic, improves the portability of the battery module, and reduces the production cost.

Description of drawings

Fig. 1 is a structural schematic diagram of an embodiment of the heat conduction structure of the battery module of the present invention;

FIG. 2 is a schematic diagram of the explosion in FIG. 1 .

Explanation of reference numerals: 1 is a battery module, 10 is a single battery, 2 is a heat transfer device, 20 is a liquid cooling plate, and 21 is a heat pipe.

The realization of the purpose of the utility model, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

The utility model provides a heat conduction structure of a battery module. Referring to FIG. 1 and FIG. 2, in this embodiment, the heat conduction structure of the battery module includes a battery module and a heat transfer device, and the battery module includes several single battery, the heat transfer device includes a heat pipe and a liquid cooling plate, one section of the heat pipe is in contact with the single battery, and the other section of pipe is connected to the liquid cooling plate, and the liquid cooling plate is made of thermally conductive plastic made.

Thermally conductive plastic is a plastic composite material compounded by adding thermally conductive metal oxides, graphite fibers or carbon fibers to ordinary plastics, which has excellent thermal conductivity; the liquid cooling plate made of thermally conductive plastic has a higher weight than the metal liquid cooling plate It has the advantages of light weight, easy processing, safety (insulation and flame retardancy) and excellent mechanical properties. It also improves the safety and portability of the battery module and reduces production costs.

The heat pipe and the liquid cold plate are integrated, and the connection between the heat pipe and the liquid cold plate can be completed during the production of the liquid cold plate, such as adding a heat pipe when the liquid cold plate is injected, and after the liquid cold plate is cooled, That is to complete the connection between the heat pipe and the liquid cooling plate, or the bonding connection between the heat pipe and the liquid cooling plate; the two ends of the liquid cooling plate are respectively provided with a liquid inlet and a liquid outlet, and the transmission The heat device also includes a liquid pump and a liquid storage tank, the outlet of the liquid storage tank is connected to the liquid pump and the liquid inlet in turn, and the liquid outlet is connected to the inlet of the liquid storage tank; preferably, the heat pipe can be flat shape, the thickness range is between 3-5mm (included), to save space and reduce the volume of the battery module; the heat pipe can be provided with a layer of heat-conducting silicone layer, which can enhance the heat conduction effect, and in When the single battery leaks electricity, isolate the single battery and the heat pipe to prevent the power supply from leaking out through the heat pipe and the liquid cooling plate; The contact area between the heat pipe and the battery cell can be increased to improve the heat transfer efficiency; in order to facilitate the insertion of the heat pipe between the battery cells, the heat pipe can be vertically arranged on the liquid cold plate; the liquid cold plate It is arranged close to the side of the battery module, and the heat pipe is arranged between the single batteries. Preferably, in order to improve the heat dissipation effect, a single battery is spaced between the heat pipes, or, in order to make each The utilization rate of the heat pipe is higher, and two single cells are separated between the heat pipes; when the battery module has only one, the heat pipe is welded on the same side of the liquid cold plate; when the battery module has two , the heat pipes are welded on both sides of the liquid cooling plate, and the liquid cooling plate is arranged between two battery modules.

The above are only preferred embodiments of the present utility model, and are not intended to limit the patent scope of the present utility model. Any equivalent structure or equivalent process conversion made by using the description of the utility model and the contents of the accompanying drawings, or directly or indirectly used in other related All technical fields are all included in the scope of patent protection of the utility model in the same way.

Claims (10)

1. A heat conduction structure of a battery module, comprising a battery module and a heat transfer device, the battery module including a number of single cells arranged in parallel, characterized in that the heat transfer device includes a heat pipe and a liquid cold plate, the One section of the heat pipe is in contact with the single battery, and the other section is connected to the liquid cold plate, and the liquid cold plate is made of thermally conductive plastic. 2 . The heat conduction structure of the battery module according to claim 1 , wherein the heat pipe is integrated with the liquid cooling plate. 3 . 3. The heat conduction structure of the battery module according to claim 1 or 2, wherein the heat pipe is arranged between the unit batteries, and one or two unit batteries are separated between the heat pipes. 4. The heat conduction structure of the battery module according to claim 1, wherein a liquid inlet and a liquid outlet are respectively provided at both ends of the liquid cooling plate. 5. The heat conduction structure of the battery module according to claim 4, wherein the heat transfer device further comprises a liquid pump and a liquid storage tank, and the outlet of the liquid storage tank is sequentially connected to the liquid pump and the liquid inlet , the liquid outlet is connected to the inlet of the liquid storage tank. 6. The heat conduction structure of the battery module according to claim 1, wherein the heat pipe is flat. 7 . The heat conduction structure of the battery module according to claim 1 , wherein the heat pipe is in an arch shape with both ends bent inward. 8 . 8. The heat conduction structure of the battery module according to claim 1, wherein the heat pipe is vertically arranged on the liquid cooling plate. 9 . The heat conduction structure of the battery module according to claim 1 , wherein a heat conduction silica gel layer is arranged on the outside of the heat pipe. 10 . The heat conduction structure of a battery module according to claim 1 , wherein the number of the battery modules is two, and the liquid cooling plate is arranged between the two battery modules. 11 .