CN220138394U - Spontaneous combustion preventing device for power battery of new energy automobile - Google Patents

Abstract

The utility model discloses a new energy automobile power battery spontaneous combustion prevention device, which comprises a battery pack and a plurality of power batteries therein, wherein the power batteries are distributed in a form of a plurality of modules; the battery pack is internally provided with a temperature signal sensor and a smoke signal sensor which are in communication connection with the singlechip, and the valve switch is driven by the singlechip. The device fully monitors the state of the power battery, predicts the safety coefficient of the power battery through the state of the power battery, and when detecting that the power battery is abnormal and spontaneous combustion possibly occurs, the device automatically cuts off the output of the power battery and simultaneously strengthens the cooling of the power battery.

Description

Spontaneous combustion preventing device for power battery of new energy automobile

Technical Field

The utility model relates to the technical field of electric safety devices, in particular to an anti-spontaneous combustion device of a power battery of a new energy automobile.

Background

At present, the problem of spontaneous combustion of a new energy automobile frequently happens, and a certain automobile is frequently heard to have spontaneous combustion, compared with a traditional automobile, the new energy automobile is easier to have spontaneous combustion, the spontaneous combustion is concentrated on the body of a power battery, when the spontaneous combustion of the power battery occurs, the loss of the automobile is caused, meanwhile, the automobile and articles beside the automobile are often affected, serious fire is easily caused, and huge loss is caused for an automobile owner and other people. How to prevent and stop spontaneous combustion of the power battery, the spontaneous combustion rate of the power battery is reduced, huge losses to car owners and other people are reduced, and the fire of the car is minimized, which also becomes a social concern. Various spontaneous combustion prevention devices are also appeared on the market, and mainly comprise (1) a lithium ion battery thermal runaway early warning system, (2) a new energy battery with a spontaneous combustion prevention structure, (3) an automobile spontaneous combustion prevention automatic fire extinguishing device, and the like. At present, some devices mainly aim at spontaneous combustion fire extinguishment in a carriage of a traditional automobile, and even though only an early warning system aiming at thermal runaway of a battery does not carry out emergency measures, the device of a new energy battery with an spontaneous combustion prevention structure occupies a large space inside a power battery, the battery structure is greatly changed, and the device is not applicable to the situation that the space of the power battery is very compact.

Disclosure of Invention

The utility model aims to provide an anti-spontaneous combustion device of a power battery of a new energy automobile, which aims to solve the problems in the background technology. The utility model adopts a mode of combining prevention and emergency, thereby achieving the purpose of preventing the spontaneous combustion of the power battery of the new energy automobile.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a new energy automobile power battery spontaneous combustion preventing device, includes battery package and a plurality of power batteries in it, and power batteries is laid out in the form of a plurality of modules, its characterized in that, set up the singlechip in the battery package, set up the pipeline of putting out a fire of circuitous above power battery, put out a fire on the pipeline and arrange a plurality of pinhole atomizers, the export of refrigerant storage jar is through valve switch connection put out a fire the pipeline; the battery pack is internally provided with a temperature signal sensor and a smoke signal sensor which are in communication connection with the singlechip, and the valve switch is driven by the singlechip.

The refrigerant storage tank comprises a first refrigerant storage tank and a second refrigerant storage tank, and the first refrigerant storage tank and the second refrigerant storage tank are respectively connected to two ports of the fire extinguishing pipeline.

And a flame detector is also arranged in the battery pack.

It can be clearly seen that the technical problems to be solved by the present utility model can be necessarily solved by the above-mentioned technical solutions of the present utility model.

Meanwhile, through the technical scheme, the utility model has at least the following beneficial effects:

1. this design has increased one set of extinguishing device on traditional heat dissipation, and real-time supervision power battery's state can in time prevent in place when appearing unusual, reduces unnecessary loss to and bigger occurence of failure.

2. The state of the power battery is monitored in real time, so that a vehicle owner can know the condition of the power battery at the first time.

3. And the good state of the power battery is ensured by adopting a double scheme of prevention and uncontrolled treatment.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a new energy automobile power battery spontaneous combustion preventing device;

FIG. 2 is a schematic illustration of a fire suppression piping layout of the present utility model;

fig. 3 is a top view of the battery pack cover of the present utility model.

In the drawings, the list of components represented by the various numbers is as follows:

in the figure: 1. a pinhole atomizer; 2. a temperature signal sensor; 3. a smoke signal sensor; 4. a battery pack; 5. a power battery; 6. a first refrigerant storage tank; 7. a second refrigerant storage tank; 8. a single chip microcomputer; 9. an electromagnetic valve; 10. fire extinguishing pipeline.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

The device fully monitors the state of the power battery, predicts the safety coefficient of the power battery through the state of the power battery, and automatically cuts off the output of the power battery and enhances the cooling of the power battery when detecting that the power battery is abnormal and spontaneous combustion possibly occurs; if spontaneous combustion of the power battery occurs, the device instantly releases the refrigerant at the moment of spontaneous combustion, and the power battery which is on fire is cooled and extinguished; the ignition can be controlled at the moment of ignition, and the larger loss is avoided.

Referring to fig. 1-3, a spontaneous combustion preventing device for a power battery of a new energy automobile comprises a battery pack 4 and a plurality of power batteries 5 therein, wherein the power batteries are distributed in a form of a plurality of modules, and the device is characterized in that a singlechip 8 is arranged in the battery pack, a roundabout fire extinguishing pipeline 10 is arranged above the power batteries, a plurality of pinhole atomizers 1 are arranged on the fire extinguishing pipeline, and an outlet of a refrigerant storage tank is connected with the fire extinguishing pipeline through a valve switch; the battery pack is internally provided with a temperature signal sensor 2 and a smoke signal sensor 3, the temperature signal sensor and the smoke signal sensor are in communication connection with the singlechip, and the valve switch is driven by the singlechip. The valve switch adopts a solenoid valve 9.

The refrigerant storage tank comprises a refrigerant storage tank I6 and a refrigerant storage tank II 7, and the refrigerant storage tank I and the refrigerant storage tank II are respectively connected to two ports of the fire extinguishing pipeline.

A flame detector (not shown) is also provided within the battery pack.

In a vehicle stationary state, the singlechip (main control module) can enter a low-power consumption mode, the temperature and smoke signal sensor operates in real time to monitor the internal condition of the battery pack, and only under the condition that the acquisition sensor is abnormal, the singlechip (main control module) can be awakened for the first time and enters a standby state.

When the single module detects that an abnormality occurs, the temperature is higher than a set value or the output voltage of the module is higher than the set value, the single-chip microcomputer controls the contactor to disconnect the charging pile from the power battery at the first time, and the single-sided machine (the main control module) continuously monitors the state (temperature and voltage) of the single module of the power battery until the module is recovered to normal; if the connection with the charging pile is disconnected, the temperature of the module is still continuously increased, a heat dissipation system of the vehicle is started to forcedly dissipate heat, finally, thermal runaway cannot be prevented, a singlechip (a main control module) is used for opening a solenoid valve to spray refrigerating fluid, and the uncontrolled module is cooled.

In the running state of the vehicle, the power battery generates more heat during running, so that the thermal runaway is more easy to happen, and if the control logic during charging is also used during running, the running safety is influenced! When the safety of driving is considered in the vehicle driving process, if the sensor detects that the temperature of the single power battery module is abnormal, the single chip microcomputer (main control module) can forcedly start the heat dissipation system of the power battery, so that the temperature of the abnormal single power battery module is reduced, and at the moment, if the abnormal single power battery module cannot dissipate heat and is out of control, the single chip microcomputer (main control module) cannot disconnect an output bus of the power battery, because the driving safety is considered, the single chip microcomputer (main control module) can open a refrigerant control valve at the first time, the single power battery module which is out of control can be rapidly cooled at the first time, and the power battery is guaranteed not to have larger loss due to open fire.

When an abnormality occurs, the single chip microcomputer (main control module) monitors the state of the power battery in real time in order to ensure the good state of the power battery, and when the abnormality occurs to the single battery module, the heat dissipation control system of the vehicle is started firstly, and the spontaneous combustion preventing device is started after the heat dissipation of the vehicle cannot be prevented; when the power battery is abnormal, the singlechip (main control module) judges abnormal data detected by sensors such as a temperature signal sensor, a heat sensor (e.g. a flame detector), a smoke signal sensor and the like; the singlechip judges the current state, when having the open fire, the singlechip (main control module) opens the nearby refrigerating fluid solenoid valve of fire very first time and cools down the battery module of open fire, avoids influencing whole power battery package to and reduce unnecessary loss.

The device can inform the vehicle owner, the current state of the power battery can be pushed to the vehicle owner through the remote system, and the power battery is abnormal, so that the vehicle owner can better solve the current state of the power battery.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It is apparent that the above-described embodiments are only some embodiments of the present utility model, but not all embodiments, and the preferred embodiments of the present utility model are shown in the drawings, which do not limit the scope of the patent claims. This utility model may be embodied in many different forms, but rather, embodiments are provided in order to provide a thorough and complete understanding of the present disclosure. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing description, or equivalents may be substituted for elements thereof. All equivalent structures made by the content of the specification and the drawings of the utility model are directly or indirectly applied to other related technical fields, and are also within the scope of the utility model.

Claims (3)

1. The utility model provides a new energy automobile power battery spontaneous combustion preventing device, includes battery package and a plurality of power batteries in it, and power batteries is laid out in the form of a plurality of modules, its characterized in that, set up the singlechip in the battery package, set up the pipeline of putting out a fire of circuitous above power battery, put out a fire on the pipeline and arrange a plurality of pinhole atomizers, the export of refrigerant storage jar is through valve switch connection put out a fire the pipeline; the battery pack is internally provided with a temperature signal sensor and a smoke signal sensor which are in communication connection with the singlechip, and the valve switch is driven by the singlechip.

2. The spontaneous combustion preventing device for the power battery of the new energy automobile as claimed in claim 1, wherein the refrigerant storage tank comprises a first refrigerant storage tank and a second refrigerant storage tank, and the first refrigerant storage tank and the second refrigerant storage tank are respectively connected to two ports of the fire extinguishing pipeline.

3. The device for preventing spontaneous combustion of the power battery of the new energy automobile as claimed in claim 2, wherein a flame detector is further arranged in the battery pack.