Thermoelectric cooling-based power battery thermal management system

A thermal management system, power battery technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems that the battery shape cannot be well matched, the structure of the liquid cooling system is complex, and the battery heat dissipation requirements cannot be met. Compact, long service life, extended life effect

Active Publication Date: 2015-07-22

广东璟域能源科技有限公司

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AI-Extracted Technical Summary

Problems solved by technology

Air cooling Due to the low heat transfer coefficient of air forced convection, this method cannot meet the heat dissipation requirements of the battery when it operates in a high-rate and high-temperature environment

The structure of the liquid cooling system is complex, and there is a potential safet...

Method used

In the present embodiment, described battery casing 107 inner walls are provided with channel 401, and its channel 401 size and composite phase-change material 101 internal metal mesh (stainless steel mesh, aluminum mesh or copper mesh etc.) 301 frame The sizes are matched to effectively adjust the position between the single batteries 106, and at the same time enhance the heat transfer of the composite phase change material 101. The battery case 107 is made of an alloy material with high thermal conductivity.

In the present embodiment, described massive composite phase-change material 101 is to be compounded by paraffin (50-90 parts) and expanded graphite (10-50 parts), places 1-2 in composite phase-change material plate interior A metal mesh (stainless steel mesh, aluminum mesh or copper mesh, etc.) 301 is used as a skeleton to enhance the thermal conductivity of the material. The composite phase-change material 101 is closely attached to the front of the squ...

Abstract

The invention discloses a thermoelectric cooling-based power battery thermal management system. The thermoelectric cooling-based power battery thermal management system comprises battery modules, a battery box body used for accommodating the battery modules, thermoelectric semiconductor chips arranged on the two side surfaces of the battery box body via embedding, ribbed radiators arranged on the top ends of the thermoelectric semiconductor chips; square battery cells arranged in the battery box body, connection straps used for connection of the battery cells, composite phase change materials arranged between each two adjacent square battery cells via embedding, skeleton metal meshes arranged in the composite phase change materials, and circuit moulds used for controlling working states of the thermoelectric semiconductor chips. The thermoelectric cooling-based power battery thermal management system is compact in structure, high in safety, and excellent in heat dissipation effect; combination of the composite phase change materials with the thermoelectric semiconductor chips is adopted, so that problems, including battery cell temperature equilibrium and rapid cooling, of battery thermal management systems are solved; at the same time, a low-temperature auxiliary heating problem caused when temperature T is lower than a critical charging temperature in powder battery charging processes is solved; and normal charging of the power batteries is ensured.

Application Domain

Secondary cells

Technology Topic

Composite phase change materialMetal +13

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Examples

Experimental program(1)

Example Embodiment

[0020] The embodiments of the present invention will be described in detail below.

[0021] Such as Figure 1 ~ Figure 5 As shown, the present invention is a power battery thermal management system based on thermoelectric cooling, using a composite phase change material 101 and a thermoelectric semiconductor chip 103 as a medium. The battery thermal management system includes a battery module 201 and a battery box housing the battery module 201 107. The thermoelectric semiconductor chips 103 embedded on both sides of the battery box 107, the finned heat sink 104 located at the upper end of the thermoelectric semiconductor chip 103, the square single cells 106 located inside the battery box 107, are used for the electricity of the single cells 106 Connected connecting piece 105, composite phase change material 101 embedded between square single cells 106, skeleton metal mesh (stainless steel mesh, aluminum mesh or copper mesh, etc.) 301 inside the composite phase change material 101, control thermoelectric semiconductor chip 103 working state of the circuit module 102, the inside of the battery box 107 is in close contact with the single cells 106 through the composite phase change material 101, the single cells 106 are in close contact with each other through the composite phase change material 101, the thermoelectric The semiconductor chip 103 is in close contact with the battery box 107, and the thermoelectric semiconductor chip 103 is in close contact with the fin heat sink 104.

[0022] In this embodiment, the inner wall of the battery box 107 is provided with a channel 401, and the size of the channel 401 matches the size of the metal mesh (stainless steel mesh, aluminum mesh or copper mesh, etc.) 301 frame of the composite phase change material 101 , Effectively adjust the position between the single cells 106, and at the same time enhance the heat transfer of the composite phase change material 101, the battery box 107 is made of alloy material with high thermal conductivity.

[0023] In this embodiment, the bulk composite phase change material 101 is a composite of paraffin wax (50-90 parts) and expanded graphite (10-50 parts), and 1-2 metal meshes are placed inside the composite phase change material plate (Stainless steel mesh, aluminum mesh or copper mesh, etc.) 301 is used as a skeleton to enhance the thermal conductivity of the material. The composite phase change material 101 is closely attached to the front of the square single cell 106, which can quickly and effectively absorb and disperse heat.

[0024] In this embodiment, the end surface of the thermoelectric semiconductor chip 103 is in close contact with the surface of the battery box 107. When the battery is in working condition, the thermoelectric semiconductor chip 103 is in the cooling mode and passes through a metal mesh (stainless steel mesh, aluminum mesh or copper mesh, etc.) The 301 frame quickly transfers the cold energy to the composite phase change material 101 to reduce the temperature; when the battery charging environment is lower than the critical temperature T, the thermoelectric semiconductor chip 103 is in heating mode through the metal mesh (stainless steel mesh, aluminum mesh or copper mesh, etc.) The 301 frame quickly transfers heat to the composite phase change material 101, increases the heating rate, improves the battery working environment, and prolongs the service life.

[0025] In this embodiment, the number of the thermoelectric semiconductor chips 103 is reasonably increased or decreased according to the demand for heat generation of the battery.

[0026] In addition, the thermal management system of a power battery based on thermoelectric cooling of the present invention effectively absorbs and disperses the heat generated by the battery 106 through the composite phase change material 101 to achieve the effect of uniform temperature and improve the working environment. Secondly, the battery thermal management system adopts the combination of the composite phase change material 101 and the thermoelectric semiconductor chip 103, which effectively avoids potential safety hazards such as liquid cooling and heat pipe cooling, and solves the problem of rapid battery cooling. At the same time, when the working environment temperature is lower than At the critical temperature T, the thermoelectric semiconductor chip 103 can realize the low-temperature auxiliary heating function, simplify the structure of the battery system, and save the system cost.

[0027] The above-mentioned embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above-mentioned embodiments. For example, if the structure or quantity of the single cell 106 and the composite phase change material 101 is changed, the thermoelectric semiconductor chip 103 can be based on Specific power, heat generation, and heat dissipation needs to be selected and designed, and any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention should be equivalent replacement methods and technologies The schemes are all included in the protection scope of the present invention.

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Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

Extended service life
compact structure

Wind power and photovoltaic power complementary power supply system based on mixed energy accumulation of super capacitor accumulator

InactiveCN101309017AReduced installed capacityExtended service life

Owner:INST OF ELECTRICAL ENG CHINESE ACAD OF SCI

Thermoelectric cooling-based power battery thermal management system

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Image

Examples

Example Embodiment

PUM

Description & Claims & Application Information

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