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Shielding gas charging battery pack suitable for new energy automobile

A technology for new energy vehicles and battery packs, applied in electric vehicle charging technology, electric vehicles, secondary batteries, etc., can solve the problem of increasing the energy density of the battery system, increasing the structural weight of the battery pack, and the lack of a good solution for the battery pack To achieve the effect of enhancing the heat dissipation effect, improving the specific energy and safety, and reducing the harm of thermal runaway

Inactive Publication Date: 2019-04-05
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there is no good way to prevent the thermal runaway of the battery pack. Common methods include increasing the distance between the batteries and filling the batteries with insulating materials to block the spread of heat and reduce the harm of thermal runaway. However, these methods do not Does not prevent batteries from burning
In order to block the air, some people have proposed a method of immersing the battery in oil, but this method will greatly increase the structural weight of the battery pack, which is contrary to the trend of increasing the energy density of the battery system

Method used

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  • Shielding gas charging battery pack suitable for new energy automobile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 As shown, a gas-filled battery pack suitable for new energy vehicles, including:

[0026] A battery pack 1, which is formed by connecting multiple batteries in series / parallel;

[0027] The battery pack case 2 is a pressure-resistant sealed case filled with protective gas inside;

[0028] The air duct 3 is connected to the battery pack shell, the air pump and the radiator;

[0029] The air pump 4 is controlled by the MCU13, and its function is to make the protective gas flow along the conduit to the radiator;

[0030] The radiator 5 is located between the air pump 4 and the battery pack casing 2, which serves as a heat exchange between the internal protective gas and the external air;

[0031] The first air pressure sensor 6 is located in the inner cavity of the battery pack housing 2, and is used to feed back the inner cavity air pressure of the battery pack to the MCU13;

[0032] The electrical interface 7, where the voltage / current sampling signa...

Embodiment 2

[0043] Such as figure 1 As shown, a gas-filled battery pack suitable for new energy vehicles, including:

[0044] A battery pack 1, which is formed by connecting multiple batteries in series / parallel;

[0045] The battery pack case 2 is a pressure-resistant sealed case filled with protective gas inside;

[0046] The air duct 3 is connected to the battery pack shell, the air pump and the radiator;

[0047] The air pump 4 is controlled by the MCU13, and its function is to make the protective gas flow along the conduit to the radiator;

[0048] The radiator 5 is located between the air pump 4 and the battery pack casing 2, which serves as a heat exchange between the internal protective gas and the external air;

[0049] The first air pressure sensor 6 is located in the inner cavity of the battery pack housing 2, and is used to feed back the inner cavity air pressure of the battery pack to the MCU13;

[0050] The electrical interface 7, the internal pressure sensor 6, the temp...

Embodiment 3

[0061] Such as figure 1 As shown, a gas-filled battery pack suitable for new energy vehicles, including:

[0062] A battery pack 1, which is formed by connecting multiple batteries in series / parallel;

[0063] The battery pack case 2 is a pressure-resistant sealed case filled with protective gas inside;

[0064] The air duct 3 is connected to the battery pack shell, the air pump and the radiator;

[0065] The air pump 4 is controlled by the MCU13, and its function is to make the protective gas flow along the conduit to the radiator;

[0066] The radiator 5 is located between the air pump 4 and the battery pack casing 2, which serves as a heat exchange between the internal protective gas and the external air;

[0067] The first air pressure sensor 6 is located in the inner cavity of the battery pack housing 2, and is used to feed back the inner cavity air pressure of the battery pack to the MCU13;

[0068] The electrical interface 7, the internal pressure sensor 6, the temp...

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Abstract

The invention relates to a shielding gas charging battery pack suitable for a new energy automobile. The battery pack comprises a battery pack shell (2) and a battery pack body (1) in the battery packshell (2). The device further comprises a gas cylinder (12), a sensor and an MCU (13), wherein the gas cylinder (12) is filled with protective gas and is communicated with the interior of the batterypack shell (2) through the gas valve (11), the sensor is respectively connected with the battery pack shell (2) and the MCU (13), the MCU (13) is connected with the gas valve (11), and the MCU (13) monitors the state of the interior of the battery pack shell (2) through the sensor and controls the opening and closing of the gas valve (11). Compared with the prior art, the battery pack is filled with protective gas, so that air can be isolated under the condition that the structural weight is not increased, and a flame-retardant effect is achieved; Gas can flow forcibly to enhance the heat dissipation effect; And a gas supplementing system is arranged to cope with gas leakage.

Description

technical field [0001] The invention relates to a battery pack, in particular to a protective gas-filled battery pack suitable for new energy vehicles. Background technique [0002] Energy saving and emission reduction have become the trend of the world. New energy vehicles include pure electric vehicles, hybrid vehicles, and fuel cell vehicles. The current development trend of new energy vehicle power batteries is high energy density, which has very high requirements for the safety and reliability of vehicle battery packs. In recent years, the thermal spontaneous combustion, fire and explosion of electric vehicle power batteries have caused the thermal runaway of batteries to attract much attention. [0003] The thermal runaway of lithium-ion batteries mainly undergoes SEI film decomposition; negative electrode-electrolyte reaction; diaphragm melting process; positive electrode decomposition reaction; electrolyte solution decomposition reaction; negative electrode and bin...

Claims

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Application Information

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IPC IPC(8): H01M2/10H01M10/42H01M2/12H01M10/613H01M10/625H01M10/48B60L58/10H01M50/204H01M50/249H01M50/30H01M50/325H01M50/383
CPCH01M10/425H01M10/486H01M10/613H01M10/625H01M50/325H01M50/383H01M50/394H01M50/20Y02T90/16Y02T10/70Y02E60/10
Inventor 魏学哲戴海峰唐轩夏菊军孙军
Owner TONGJI UNIV
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