Power battery protection structure of new energy automobile

A technology of new energy vehicles and power batteries, applied in batteries, structural parts, electric vehicles, etc., can solve problems such as external short circuit, temperature rise, endangering the personal safety of passengers, etc., to suppress vibration, ensure accuracy, and avoid the spread of fire Effect

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A technology of new energy vehicles and power batteries, applied in batteries, structural parts, electric vehicles, etc., can solve problems such as external short circuit, temperature rise, endangering the personal safety of passengers, etc., to suppress vibration, ensure accuracy, and avoid the spread of fire Effect

CN112018289AActive Publication Date: 2020-12-01HUANGHE JIAOTONG UNIV

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Embodiment 1

[0044] combine figure 1 , a new energy vehicle power battery protection structure, including a battery compartment 1 and at least one battery module 103 uniformly arranged in the battery compartment 1, including a pressure regulating mechanism 3 and a fire protection mechanism 4 disposed on the battery compartment 1, The pressure regulating mechanism 3 and the fire prevention mechanism 4 are all connected to the central controller 2, and the central controller adopts a model of STM32 as a processor chip, and realizes data communication through the RS485 serial port. Multi-directional monitoring and real-time monitoring of air tightness and fire, timely warning and alarm in case of fire, avoiding missed reports and reducing false alarms, automatic fire extinguishing in time, and effective control of fire, maintaining the air pressure in the battery compartment Stablize.

[0045] combine image 3 , the pressure regulating mechanism 3 includes a standard part 31, a differential...

Embodiment 2

[0047] On the basis of Example 1, under the premise that the volume of the standard part and the battery compartment are the same, the influence of temperature on the leakage of the medium gas in the battery compartment satisfies: ΔP=ΔP 0 [1+(T-T 0 -273) / (T 0 +273)]; where, ΔP is the pressure drop value in the battery compartment measured by the differential pressure sensor when the temperature is T, ΔP 0 for the set temperature T 0 The standard pressure drop value in the standard part.

[0048] The medium gas medium in the battery compartment is air. Under the same conditions as the battery compartment and standard parts, the symmetry of the battery compartment and standard parts and the symmetry of the solenoid valve group connected to them can eliminate the impact caused by the change of external temperature. The difference between the two, so that the differential pressure sensor can accurately measure the airtightness in the battery compartment.

Embodiment 3

[0050] combine figure 1 and Figure 4 , a new energy vehicle power battery protection structure, including a battery compartment 1 and at least one battery module 103 uniformly arranged in the battery compartment 1, including a pressure regulating mechanism 3 and a fire protection mechanism 4 disposed on the battery compartment 1, The fire prevention mechanism 4 includes a fire extinguisher 41 connected to the battery compartment 1 and at least one compound detection unit 42 arranged inside the battery compartment 1. The accuracy of the information obtained is guaranteed by the compound detection units arranged at different positions in the battery compartment. The detection unit completes the collection and processing of fire information, reduces the burden on the controller, and transmits it to the fire alarm central controller through the RS485 bus, timely and effectively distinguishes and performs preprocessing work and alarms in the early stage of fire, so as to avoid the...

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Abstract

The invention relates to a power battery protection structure of a new energy automobile. The structure comprises a voltage regulating mechanism and a fireproof mechanism which are arranged on a battery bin; the pressure regulating mechanism and the fireproof mechanism are both connected to a central controller; the pressure regulating mechanism comprises a standard part, a differential pressure sensor, a pressure release valve and a filter; the fireproof mechanism comprises a fire extinguisher connected with the battery bin and at least one composite detection unit arranged in the battery bin; each composite detection unit comprises a microprocessor as well as a temperature sensor, a smoke sensor and a CO sensor which are in communication connection with the microprocessor. The inventionaims to solve the problems in the prior art. The power battery protection structure of the new energy automobile performs multi-directional monitoring and real-time monitoring on air tightness and fire in the battery bin, timely gives an early warning and an alarm when a fire occurs, avoids missed alarms, reduces false alarms, timely and automatically extinguishes the fire, effectively controls the fire, and maintains the stability of the air pressure in the battery bin.

Description

technical field [0001] The invention belongs to the technical field of new energy battery safety, and in particular relates to a protective structure for a power battery of a new energy vehicle. Background technique [0002] Due to the large specific energy of the battery, no memory effect, good discharge performance, low manufacturing cost, long cycle life, green environmental protection, and high safety performance, lithium batteries have a wide range of applications, and the types of batteries are also diversified. The main markets are 3C digital, storage Energy batteries, power batteries and other fields. In terms of structure, lithium-ion batteries mainly include casing, positive electrode, negative electrode, electrode lead, electrolyte, diaphragm, etc., in which the positive electrode material is generally made of transition metal oxide, and the diaphragm plays the role of isolating the positive and negative electrodes. The negative electrode material is generally var...

Claims

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Application Information

Patent Timeline

01 Dec 2020

Publication

CN112018289A

IPC: H01M2/10; H01M10/48; A62C3/07; A62C3/16; A62C37/00; A62C37/36; B60L3/00; B60L50/64; G08B17/06; G08B17/10

CPC: H01M10/48; H01M10/486; A62C3/07; A62C3/16; A62C37/04; A62C37/36; B60L3/0046; B60L50/64

Inventors: 陈晓静; 郭丽娟