CN203339275U - Air-cooled electric vehicle battery thermal management device incorporating phase change materials - Google Patents

Abstract

The utility model discloses an air-cooling battery heat management device containing a phase-change material for an electric vehicle. The air-cooling battery heat management device comprises a sandwich layer which is sleeved on the outer wall of a battery, wherein an inner shell of the sandwich layer is fitted with the outer wall of the battery, a porous medium is filled between the inner shell and an outer shell of the sandwich layer, the phase-change material is respectively filled in pores of the porous medium, and the outer shell of the sandwich layer is provided with a heat radiating fin. The heat produced by the battery is transferred to the inner shell of the sandwich layer in a heat conduction manner, then transferred to the outer shell of the sandwich layer through a porous medium skeleton in the sandwich layer and finally radiated in an air cooling manner through the heat radiating fin. By adopting the phase-change material which is filled in the pores of the porous medium inside the sandwich layer, the temperature of the battery can be ensured to be maintained within an optimal constant working temperature range. The air-cooling battery heat management device is simple in structure, easy to manufacture and convenient to popularize and use. Meanwhile, by adopting the air-cooling battery heat management device, the temperature inside the battery can be ensured to be uniformly distributed, and the temperature of the battery is maintained within the optimal working range.

Description

Air-cooled electric vehicle battery thermal management device incorporating phase change materials

technical field

The utility model relates to the field of battery heat management, in particular to an air-cooled electric vehicle battery heat management device containing phase change materials. the

Background technique

Batteries are one of the core components of electric vehicles and hybrid vehicles, and their performance directly affects the performance of electric vehicles and hybrid vehicles. However, due to technical constraints, it is difficult to make major breakthroughs in the performance of power batteries in the short term. Therefore, if the electric vehicle is to be commercialized, it is necessary to ensure that the battery works under optimal conditions to improve its performance and prolong its life. The power battery pack used in electric vehicles is composed of multiple battery modules connected in series and parallel. During the charging and discharging process of the battery, heat will be generated, which will increase the overall temperature of the battery pack, and when the temperature is too high, it will seriously affect the performance of the battery. life, or even directly lead to battery failure. At the same time, when charging and discharging, the heat release or uneven heat dissipation of each single cell in the battery pack will cause temperature differences in the battery pack, and batteries with high local temperatures will age faster, and long-term operation will destroy the consistency of the battery pack, thus causing The battery pack has failed. On the other hand, when the battery works at low temperature, the battery voltage and discharge capacity will be greatly reduced, and the temperature is low to a certain extent, which may cause the electric vehicle to fail to start or run normally. Effective thermal management of the battery enables the internal temperature distribution of the battery pack to be uniform and maintains the temperature of the entire battery pack within the optimal operating temperature range of the battery, which is crucial to improving battery performance and extending battery life. Therefore, the development of a high-performance battery thermal management system is of great significance to the popularization and application of electric vehicles and hybrid vehicles. the

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, and propose an air-cooled electric vehicle battery thermal management device containing phase change materials that can maintain the battery temperature within the optimum temperature range. the

The utility model adopts the following technical solutions:

An air-cooled electric vehicle battery heat management device containing phase change materials, comprising a battery box, a plurality of interconnected batteries are arranged in the battery box, the outer wall of the battery is covered with an interlayer, and the inner shell of the interlayer and the battery The outer wall of the interlayer is bonded, and a porous medium is filled between the inner shell and the outer shell of the interlayer, and the pores of the porous medium are filled with phase change materials. the

Radiating fins are arranged on the sandwich shell. the

The porous medium is made of copper or aluminum. the

The heat dissipation fins are one of flat plate, corrugated plate or triangular corrugated plate. the

Working process of the utility model:

The heat emitted by the battery is transferred to the inner shell of the interlayer through heat conduction, to the outer shell through the porous medium skeleton in the interlayer, and finally dissipated through the cooling fins in an air-cooled manner. The heat released by the battery when it works stably under a certain load It can be dissipated through the above-mentioned heat conduction method, and the battery temperature is kept in the optimal temperature range; when the battery load is unstable, the heat generated by the battery will also change rapidly, and the phase change material filled in the pores of the porous medium can absorb part of the heat. Keep the battery temperature within the optimum temperature range. the

The beneficial effects of the utility model:

(1) The interlayer filled with porous media and phase change materials not only has good thermal conductivity but also has strong heat storage capacity, which can ensure the uniform distribution of the internal temperature of the battery and ensure that the battery temperature is maintained within the optimal operating temperature range;

(2) The interlayer has good sealing performance, which can effectively prevent the battery from being corroded by the phase change material or damaged by the leakage of the phase change material;

(3) Heat dissipation fins are installed on the shell of the interlayer, and the heat dissipation fins can be flat, wave-shaped, triangular corrugated, etc., which can enhance the heat dissipation effect;

(4) In the battery box, the cooling fins on the interlayer shells of all batteries are connected together, which has a good fixing effect on the batteries. the

Description of drawings

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

Fig. 2 is a top view of batteries arranged in a row in the embodiment of the utility model;

Figure 3 (a) Schematic diagram of the structure of the flat plate outer fin, (b) Schematic diagram of the structure of the corrugated outer fin, (c) Schematic diagram of the structure of the triangular corrugated outer fin;

Fig. 4 is a top view of batteries staggered in an embodiment of the present invention. the

The figure shows:

101-battery, 102-interlayer inner shell, 103-phase change material, 104-interlayer outer shell, 105-radiation fins. the

Detailed ways

The utility model will be described in further detail below in conjunction with the embodiments and accompanying drawings, but the implementation of the utility model is not limited thereto. the

Example

As shown in Figure 1, an air-cooled electric vehicle battery thermal management device containing phase change materials includes a battery box, and a plurality of interconnected batteries 101 are arranged in the battery box, and the outer wall of the battery is covered with an interlayer, so that The inner shell 102 of the interlayer is bonded to the outer wall of the battery 101 to reduce the contact thermal resistance, and a porous medium is filled between the inner shell 102 of the interlayer and the outer shell 104 of the interlayer, and the phase change material 103 is filled in the pores of the porous medium , heat dissipation fins 105 are arranged on the sandwich shell. the

As shown in Fig. 3 (a) (b) (c), the heat dissipation fins 105 are one of flat plate, corrugated plate or triangular corrugated plate to enhance the heat dissipation effect. the

The batteries 101 in the battery box can be arranged in sequence, staggered or mixed. As shown in FIG. Schematic diagram of the staggered arrangement in the battery box. the

The porous medium is made of materials with good thermal conductivity such as copper or aluminum, and the phase change material 103 can be an inorganic, organic or composite phase change material, and the phase change temperature of the phase change material should be within the optimum operating temperature range of the battery. The type of phase change material is selected according to the battery operating temperature. the

The thicknesses of the porous medium and the phase change material are determined according to the battery type and working characteristics. the

The cold air in the battery box can adopt natural ventilation or forced ventilation. When natural ventilation is used, an air filter should be installed in front of the battery box to purify the air before entering the battery box; when forced ventilation is used, an air filter should also be included. and fan. the

The heat emitted by the battery is transferred outward through the inner shell of the interlayer and the porous medium skeleton in the interlayer through heat conduction, and finally dissipated through the outer fins in an air-cooled manner. Since the porous medium filled with phase change materials has a strong heat storage capacity, it plays a role of heat buffer in the heat transfer process, so that the temperature of each part of the battery is more uniform, and the battery temperature can be maintained in the optimal operating temperature range. Inside. the

The above-mentioned embodiment is a preferred implementation mode of the present utility model, but the implementation mode of the present utility model is not limited by the described embodiment, and any other changes, modifications, modifications, Substitution, combination, and simplification should all be equivalent replacement methods, and are all included in the protection scope of the present utility model. the

Claims (4)

1. a Luftgekuhlte rotierende batteries of electric automobile heat management device that contains phase-change material, comprise battery case, a plurality of interconnective batteries are set in described battery case, described battery outer wall cover has interlayer, the inner casing of described interlayer and the laminating of the outer wall of battery, it is characterized in that, filling porous medium between the Inner of interlayer shell and shell, fill phase-change material in the hole of described porous media.

2. the Luftgekuhlte rotierende batteries of electric automobile heat management device that contains phase-change material according to claim 1, is characterized in that, on described interlayer shell, radiating fin is set.

3. the Luftgekuhlte rotierende batteries of electric automobile heat management device that contains phase-change material according to claim 1, is characterized in that, described porous media is made by copper or aluminium.

4. the Luftgekuhlte rotierende batteries of electric automobile heat management device that contains phase-change material according to claim 2, is characterized in that, described radiating fin is a kind of in plate, Wave plate shape or triangle corrugated plate type.

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