Battery module combined with phase change material

Abstract

A battery module combined with a phase change material comprises a battery module body, a plurality of heat dissipation hydrogel pieces are attached to the side wall of the battery module body, heat dissipation hydrogel pieces are also attached to the bottom of the battery module body, and the battery module further comprises waterproof breathable films which are located on the two sides of the module body and connected with the heat dissipation hydrogel pieces. The battery module comprises a heat dissipation hydrogel sheet, a waterproof breathable film located at the bottom of the module and connected with the heat dissipation hydrogel sheet, and a bottom shell for mounting the battery module, the battery module is subjected to heat dissipation by using a hydrogel phase change material, and heat generated in a working state of the battery module is extracted from the battery module by using large latent heat of vaporization (2300-2500kJ / kg) of water in hydrogel, so that the heat dissipation efficiency of the battery module is improved, and the service life of the battery module is prolonged. And evaporated water vapor is released into air, so that micro through holes are formed in the two side surfaces of the battery module shell to prevent the air pressure in the battery module from being too high and the water vapor in the module from being condensed into small water drops after cooling, and meanwhile, the waterproof performance of the battery module is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric vehicle battery field especially, it is a kind of battery module in combination with phase change material. BACKGROUND

[0002] With the progress of society and the development of science and technology, electric two-wheeled vehicle is loved by the public due to its convenient and environmental characteristics, and gradually popularized, battery module is the power source of electric two-wheeled vehicle, a large amount of heat is generated during battery charging and use, if battery overheating will shorten the service life of battery, serious will cause battery spontaneous combustion to cause serious damage to people's life and property, but the existing battery pack heat dissipation structure is generally battery passive heat dissipation and configuration heat dissipation fan, poor heat dissipation effect, and frequent use, service life is short, so effective heat dissipation becomes the primary problem in the process of two-wheeled vehicle battery use.

[0003] The core method of the existing two-wheeled vehicle battery cooling includes liquid cooling technology and air cooling technology, liquid cooling technology uses liquid with better heat dissipation performance to replace air cooling, which can effectively reduce the battery temperature and improve the operation stability, air cooling technology uses fan to extract heat and uses air convection to dissipate heat, but liquid cooling and air cooling have high requirements on two-wheeled vehicle battery module design and structure, and are greatly limited by structure and cost. UTILITY MODEL CONTENTS

[0004] To solve the above problems, the technical scheme provides a battery module in combination with phase change material.

[0005] To achieve the above purpose, the technical scheme is as follows:

[0006] A battery module in combination with phase change material, including battery module, the side wall of the battery module is attached with a plurality of heat dissipation hydrogel pieces, the bottom is also attached with a heat dissipation hydrogel piece, further including waterproof and breathable film connected with the heat dissipation hydrogel piece on both sides of the module, and waterproof and breathable film connected with the heat dissipation hydrogel piece on the bottom of the module, further including bottom shell for installing the battery module.

[0007] In some embodiments, the side wall and the bottom of the bottom shell are provided with a plurality of through holes.

[0008] In some embodiments, the heat dissipation hydrogel piece is attached by heat-conducting double-sided adhesive.

[0009] In some embodiments, the module further includes a first handle provided on the top and can be turned over.

[0010] In some embodiments, the module further includes a second handle provided on one side.

[0011] The application has the following advantages:

[0012] The application uses a hydrogel phase change material to dissipate heat of a battery module, uses large latent heat of vaporization of water in the hydrogel 2300-2500kJ / kg to remove heat generated by the battery module in a working state from the battery module, and releases the water vapor to the air through evaporation, to avoid high air pressure in the battery module and condensation of water vapor into small water droplets in the battery module after cooling, micro-holes are designed on two side surfaces of a shell of the battery module, a waterproof and breathable film is attached to the side surface of the shell to improve waterproof performance of the battery module, the water vapor evaporated after the hydrogel absorbs heat can be released to the air outside the module through the micro-holes and the waterproof and breathable film, and the hydrogel absorbs water vapor in the air to supplement the hydrogel to realize recycling during the cooling process. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description.

[0014] Figure 1 is a disassembled structural schematic of the embodiment of the present application Figure 1 ;

[0015] Figure 2 is a disassembled structural schematic of the embodiment of the present application Figure 2 . DETAILED DESCRIPTION

[0016] In order to make the technical problems, technical solutions and beneficial effects solved by the present application more clearly understood, the following will further describe the present application in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0017] Please refer to Figures 1-2 , a battery module combined with a phase change material, including a battery module 1, a plurality of heat dissipation hydrogel pieces 2 are attached to side walls of the battery module 1, a heat dissipation hydrogel piece 2 is also attached to a bottom of the battery module 1, further including waterproof and breathable films 3 connected with the heat dissipation hydrogel pieces 2 on two sides of the module and the heat dissipation hydrogel pieces 2 on the bottom of the module, further including a bottom shell 4 for installing the battery module 1.

[0018] Specifically, a plurality of through holes 5 are arranged on the side walls and the bottom of the bottom shell 4.

[0019] Specifically, the heat dissipation hydrogel pieces 2 are attached by heat-conducting double-sided adhesive.

[0020] Specifically, the module further includes a first handle 6 arranged on the top and capable of being flipped.

[0021] Specifically, the module further includes a second handle 7 arranged on one side.

[0022] The heat dissipation battery module includes internal batteries, an electrical system, a module shell, side heat dissipation hydrogel, bottom heat dissipation hydrogel, side waterproof and breathable film, and bottom waterproof and breathable film. The side and bottom heat dissipation hydrogel are in close contact with the side and bottom of the battery, respectively. The heat-conducting double-sided adhesive is used to connect the hydrogel and the battery. The heat dissipation hydrogel directly absorbs the heat generated by the battery while improving the safety of the battery module due to the softness and compressibility of the hydrogel. The heat dissipation hydrogel protects the battery module from shock and improves reliability. The water in the hydrogel absorbs heat and evaporates into water vapor, which carries the heat generated and releases it to the outside air through the micro-holes on the module shell and the waterproof and breathable film, and balances the air pressure inside and outside the battery module, reducing the temperature of the battery. The battery side and bottom are designed with heat dissipation hydrogel to ensure symmetrical heat dissipation and ensure that the battery is symmetrically positioned and has the same level of heat dissipation, reducing the temperature difference between each battery and improving the overall life of the battery module.

[0023] During the battery resting period, the temperature in the battery module decreases, and the evaporated water vapor in the heat dissipation hydrogel gradually replenishes the inside of the heat dissipation hydrogel from the air through the waterproof and breathable film and the micro-holes on the module shell, preparing for the next use of the battery module for heat dissipation, achieving recycling.

[0024] Compared with the passive heat dissipation, liquid cooling, and air cooling technologies on the market, this heat dissipation method has a simple structure design, easy installation, and does not require additional power for heat dissipation. Due to the large latent heat of water vaporization, which is about 10 times that of ordinary phase change materials, the cost is low, and more heat can be absorbed and released using the smallest structural space.

[0025] The above description is only the preferred embodiment of the present application and is not intended to limit the scope of the application. Other principles and basic structures that are the same or similar to the present application are within the scope of the present application.

Claims

1. A battery module incorporating a phase change material, characterized by, The application relates to a battery module (1) which is provided with a plurality of heat-dissipating hydrogel pieces (2) on the side walls and the bottom, and is further provided with waterproof and breathable membranes (3) which are connected with the heat-dissipating hydrogel pieces (2) on both sides and the bottom of the battery module (1), and is further provided with a bottom shell (4) which is used for mounting the battery module (1).

2. The battery module incorporating phase change material of claim 1, wherein: The side walls and the bottom of the bottom shell (4) are provided with a plurality of through holes (5).

3. The battery module incorporating phase change material of claim 2, wherein: The heat-dissipating hydrogel pieces (2) are attached by heat-conducting double-sided adhesive tapes.

4. The battery module integrated with phase change material of claim 1, wherein: The battery module is further provided with a first handle (6) which is arranged on the top and can be turned over.

5. The battery module integrated with phase change material of claim 1, wherein: The battery module is further provided with a second handle (7) which is arranged on one side.

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