CN207199800U - A battery module cooled by air and phase change materials - Google Patents

Abstract

The utility model relates to a battery module based on air and phase change material cooling, including a plurality of battery monomers and the parallel flow aluminum flat tube of setting between two battery monomers. A plurality of micro channels are formed on the parallel flow aluminum flat tube; the micro-channel comprises a plurality of micro-channels used as air flow channels and a plurality of micro-channels filled with phase-change materials; at least one micro channel serving as an air flow channel is arranged between every two adjacent micro channels filled with the phase change materials. According to the above technical scheme, the utility model discloses a be applied to phase change material in the battery heat management, when battery module reaches phase change material's phase change temperature at discharge process temperature, the heat that battery module emitted is absorbed and is stored with the form of latent heat to the realization is to the control of temperature, reduces the temperature difference in the group battery, reduces the formation of local hot area, prevents effectively that battery thermal runaway, improves battery module's life.

Description

A battery module cooled by air and phase change materials

technical field

The utility model relates to the technical field of battery heat management, in particular to a storage battery module cooled by air and phase change materials.

Background technique

Lithium batteries are the power source of pure electric vehicles, and their temperature characteristics directly affect the performance, safety, reliability, and service life of electric vehicles, and the consistency of the temperature field has a greater impact on capacity and discharge efficiency. Further improving safety and ensuring that the battery operates in a safe range is crucial to the research on battery thermal management.

At present, battery thermal management is mainly divided into three types according to the heat transfer medium: air cooling, liquid cooling and phase change material cooling. The air-cooled heat transfer coefficient is low, and the cooling and heating speeds are slow. Liquid cooling is good for heat dissipation, but the pipeline layout is complicated and the weight is relatively large. The phase change material has high latent heat and thermal conductivity, which can improve the temperature distribution of the battery pack, make full use of the capacity, and meet the working requirements of the battery. Therefore, the use of phase change materials in battery thermal management systems is the main power battery cooling technology in the future. During the application process of the battery, a combination of forced cooling and phase change material cooling is used to dissipate the absorbed heat.

Utility model content

The purpose of the utility model is to provide a storage battery module based on air and phase change material cooling, which can improve the cooling capacity and ensure the performance, safety and service life of the storage battery.

In order to achieve the above object, the utility model adopts the following technical solutions:

A battery module based on air and phase change material cooling, including several battery cells and parallel flow aluminum flat tubes arranged between the two battery cells. Several microchannels are opened on the parallel flow aluminum flat tube; the microchannels include several microchannels as air flow channels and several microchannels filled with phase change materials. At least one microchannel serving as an air channel is spaced between two adjacent microchannels filled with phase change materials.

Further, the parallel flow aluminum flat tube is pasted on the side of the battery cell through an insulating spacer, and the length of the parallel flow aluminum flat tube is equal to the length of the battery cell, and the height of the parallel flow aluminum flat tube is equal to the length of the battery cell high.

Further, the module also includes a fan for forced blowing air flow.

It can be seen from the above technical solutions that the utility model applies the phase change material to the thermal management of the battery, so that when the temperature of the battery module reaches the phase change temperature of the phase change material during the discharge process, it relies on the phase change latent heat of the phase change material to absorb the battery The heat released by the module is stored in the form of latent heat, so as to realize the control of temperature, reduce the temperature difference in the battery pack, reduce the formation of local hot spots, effectively prevent the battery thermal runaway, and improve the service life of the battery module. The utility model can ensure the consistency of the temperature of each battery in the module. The parallel flow aluminum flat tube adopted by the utility model has the advantages of light weight, good thermal conductivity, strong corrosion resistance, etc., and can achieve the purpose of heat dissipation.

Description of drawings

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

Figure 2 is a schematic diagram of the position and structure of the battery cell and the parallel flow aluminum flat tube;

Fig. 3 is a schematic diagram of the length, width and height of a battery cell.

in:

1. Battery monomer, 2. Parallel flow aluminum flat tube, 3. Air flow channel, 4. Micro channel.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described:

As shown in FIGS. 1-2 , a battery module based on air and phase change material cooling includes several battery cells 1 and parallel-flow aluminum flat tubes 2 arranged between two battery cells 1 . A lot of microchannels are opened on the parallel flow aluminum flat tube 2; some of these microchannels are used to fill phase change materials, and the rest of the microchannels are not filled with anything and are used as air flow channels. That is to say, the microchannels include two types: several microchannels 3 serving as air flow channels and several microchannels 4 filled with phase change materials. At least one microchannel 3 serving as an air channel is spaced between two adjacent microchannels 4 filled with phase change materials. By setting up microchannels 3 as air flow channels and microchannels 4 filled with phase change materials on the parallel flow aluminum flat tubes 2, at least one of the adjacent microchannels 4 filled with phase change materials acts as The micro-channel 3 of the air flow channel can dissipate the phase-change latent heat stored in the phase-change material and the heat of the battery cell into the air through forced convection. Because phase change materials have different melting point temperatures, according to the needs of actual use, phase change materials with different melting points can be selected to meet the work requirements. Air is fed in from the lower side of the battery module and exhausted from the upper side, as shown by the air inlet and air outlet in Figure 1.

Further, the parallel-flow aluminum flat tube 2 is pasted on the side of the battery cell 1 through an insulating spacer, and the length of the parallel-flow aluminum flat tube 2 is equal to the length of the battery cell 1, and the height of the parallel-flow aluminum flat tube 2 is Equal to the height of the battery cell 1, this design can make full use of space, increase the contact area, and enhance heat exchange. The parallel flow aluminum flat tube 2 is flush with the surface of the battery cell 1 . The two side faces of the parallel flow aluminum flat tube 2 are respectively pasted on the side faces of the two battery cells 1 through insulating spacers. The insulating spacer plays the role of insulation and attachment.

Further, the module also includes a fan for forced blowing air flow.

On the basis of fan forced blowing air flow cooling for heat dissipation, the utility model also uses phase change material for cooling, which effectively improves the heat dissipation capacity and ensures the service performance, safety and service life of the storage battery. A parallel-flow aluminum flat tube is set between two battery cells, and several micro-channels as air channels and several micro-channels filled with phase-change materials are respectively set on the parallel-flow aluminum flat tubes (the phase-change materials are Sealed in the microchannel), this design can not only improve the heat dissipation capacity of the battery module, but also avoid problems such as excessive deformation and leakage of the phase change material during the phase change process.

The above-mentioned embodiments are only described to the preferred implementation of the utility model, and are not limited to the scope of the utility model. Various modifications and improvements made should fall within the scope of protection determined by the claims of the utility model.

Claims (3)

1. A kind of 1. battery module cooled down based on air and phase-change material, it is characterised in that：Including some single batteries with And it is arranged on the concurrent flow aluminium flat conduit between two single batteries；Some microchannels are offered on the concurrent flow aluminium flat conduit； The microchannel includes several as the microchannel of air flow channel and several microchannels filled with phase-change material；Adjacent two At least one microchannel as air flow channel is separated between the individual microchannel filled with phase-change material.
2. A kind of 2. battery module cooled down based on air and phase-change material according to claim 1, it is characterised in that：Institute State concurrent flow aluminium flat conduit to be attached on single battery side by insulating spacer, and the length of concurrent flow aluminium flat conduit is equal to battery The length of monomer, the height of concurrent flow aluminium flat conduit are equal to the height of single battery.
3. A kind of 3. battery module cooled down based on air and phase-change material according to claim 1, it is characterised in that：Should Module also includes being used to force the fan for blowing air flow.