CN207925620U - A kind of power battery thermal runaway early warning system - Google Patents
A kind of power battery thermal runaway early warning system Download PDFInfo
- Publication number
- CN207925620U CN207925620U CN201820483834.6U CN201820483834U CN207925620U CN 207925620 U CN207925620 U CN 207925620U CN 201820483834 U CN201820483834 U CN 201820483834U CN 207925620 U CN207925620 U CN 207925620U
- Authority
- CN
- China
- Prior art keywords
- battery
- early warning
- management system
- thermal runaway
- power battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Secondary Cells (AREA)
Abstract
The utility model discloses a kind of power battery thermal runaway early warning system, battery cell, which is fixed in module frame, constitutes battery unit, multiple battery units, which are fixed in battery case, constitutes power battery, the power battery is equipped with battery management system, total voltage, the power battery total electricity of the battery management system acquisition power battery output bus, the battery management system acquires the voltage of each battery cell, electricity, the battery management system output alarm signal to interior alarm unit.The utility model battery thermal runaway early warning system is stable and reliable in work, early warning is set to increase to the time for actually occurring thermal runaway, personal safety guarantee is provided to the greatest extent, additionally be capable of early warning abuse generation, can early warning micro-short circuit extension, and energy real-time early warning thermal runaway, improve the safety that battery uses.
Description
Technical field
The utility model is related to power battery fields.
Background technology
Under the dual-pressure of energy crisis and environmental crisis, the new-energy automobiles such as electric vehicle become the vapour of current mainstream
Vehicle developing direction.Lithium ion battery due to it is higher than energy, have extended cycle life, have become pure electric automobile and plug-in mixing be dynamic
The preferred battery of power automobile.However lithium ion battery shows as thermal runaway there is potential thermal hazard.Lithium ion battery goes out
Existing thermal runaway, it is most since exothermic reaction occurring between inside battery material, generate a large amount of heat and gas.
Battery is likely to occur thermal runaway when overheating, overcharging, mechanical force is destroyed, it is final induce fire or
Person is exploded.In order to improve the safety of lithium ion battery, lithium ion battery must pass through relevant safety test regulation.However i.e.
Make, by whole safety test projects, to be also unable to ensure the safety of lithium ion battery.In principle, heat occurs for lithium ion battery
The process out of control that the diffusion of an internal short-circuit can all be undergone, and the internal short-circuit triggering mechanism and reason of lithium ion battery are also unclear so far
Chu, when internal short-circuit, which can occur, for lithium ion battery may be unexpected by, and therefore, be analyzed from principle, and lithium-ion battery monomer occurs
Thermal runaway can't avoid, therefore, the technology that the thermal runaway early warning of lithium ion battery, forecast and protection just necessitate.
In the prior art, mainly there are the method for finding thermal runaway using flame detecting technology, such methods can only be in electricity
Pond thermal runaway could be found when developing to open fire burning, find opportunity lag；Also a kind of method is detection battery cell
Temperature or temperature variations, such methods will be completed to detect and send out forecast, need to every before thermal runaway occurs for battery
The temperature of a battery cell does comprehensive monitoring, performance difficulty；Third class method is to carry out early warning using multi-parameter, such as to temperature
Degree, gas concentration, smokescope etc. are detected, according to the changing rule of one group of parameter as the early warning for judging thermal runaway.It is existing
Technology is all to be detected to be very limited with early warning, pre-warning time according to the external behavior of battery, is unfavorable for the protection person
Safety, needs to be further improved.
Utility model content
Technical problem to be solved in the utility model, which is that realization is a kind of, timely, accurate and effective to be lost battery heat
Control carries out pre-warning system.
To achieve the goals above, the technical solution adopted in the utility model is：A kind of power battery thermal runaway early warning system
System, battery cell, which is fixed in module frame, constitutes battery unit, and multiple battery units, which are fixed in battery case, constitutes power battery,
The power battery is equipped with battery management system, and the total voltage of the battery management system acquisition power battery output bus is moved
Power battery total electricity, the battery management system acquire the voltage of each battery cell, electricity, the battery management system output
Alarm signal is to interior alarm unit.
Pressure sensor and acceleration transducer are equipped in the battery case, the pressure sensor exports battery case internal pressure
For force signal to battery management system, the acceleration transducer exports current vehicle acceleration state to battery management system.
It is equipped with temperature sensor on the module frame of each battery unit, temperature sensing is fixed on the battery case
Device, each temperature sensor output temperature signal to battery management unit.
Each battery cell is equipped with voltage and electric quantity acquisition unit, and the voltage and power supply collecting unit export letter
Number to battery management unit, the battery management system is equipped with charge balancing subsystem, the battery management system output driving
Signal to charge balancing subsystem, the charge balancing subsystem input terminal connects power battery output end, and output end connects respectively
Connect each battery cell.
The utility model battery thermal runaway early warning system is stable and reliable in work, makes early warning to the time for actually occurring thermal runaway
Can increase, to the greatest extent provide personal safety guarantee, additionally be capable of early warning abuse generation, can early warning micro-short circuit expand
Exhibition, and energy real-time early warning thermal runaway, improve the safety that battery uses.
Description of the drawings
The content of every width attached drawing expression in the utility model specification is briefly described below：
Fig. 1 is power battery thermal runaway early warning system block diagram.
Specific implementation mode
Power battery thermal runaway early warning system provides a kind of early warning system of lithium ion battery thermal runaway, makes early warning to reality
The time of thermal runaway, which occurs, to be increased, and more reliable guarantee is provided for personal safety.
Battery cell, which is fixed in module frame, constitutes battery unit, mutual connection in series-parallel between battery cell, in battery unit
It is made up of conduction connector battery core, multiple battery units, which are fixed in battery case, constitutes power battery.
Power battery be furnished with battery management system, battery management system by from control detection battery cell voltage and temperature,
High-pressure modular detects the total voltage and total current of battery system, and master control protected, is communicated and the realization of management strategy.
Battery management system is equipped with charge balancing subsystem, is the auxiliary system of battery management system, is filled in battery system
Supplement electricity is carried out for the monomer of not full electricity after full electricity, until the full electricity of each monomer.Each battery cell be equipped with voltage and
Electric quantity acquisition unit, voltage and power supply collecting unit output signal to battery management unit, battery management system output driving
Signal to charge balancing subsystem, charge balancing subsystem input terminal connects power battery output end, and output end is separately connected often
A battery cell.
Battery management system acquires total voltage, the power battery total electricity of power battery output bus, battery management system
Acquire voltage, the electricity of each battery cell, battery management system is according to the parameter output alarm signal of acquisition to interior report
Vehicle audio system may be used in alert unit, alarm unit.
System is equipped with pressure sensor, for measuring pressure of the battery cell by babinet, pressure sensor output induction
Signal is to battery management system；System is equipped with acceleration transducer, the acceleration for measuring battery system, acceleration transducer
Inductive signal is exported to battery management system；System is equipped with temperature sensor, and temperature is equipped on the module frame of each battery unit
Sensor is spent, temperature sensor, all equal output temperature signals of temperature sensor to battery management system are fixed on battery case.
Method for early warning based on above-mentioned power battery thermal runaway early warning system：
Power battery thermal runaway early warning system is by battery management system and each sensor collection to following data：Battery
The voltage of monomer, temperature, voltage, the electric current of battery system, the temperature of Battery case, pressure, acceleration.
First according to the size and Orientation of battery system current, judge that battery system is in charging, electric discharge or stands shape
Body.
When power battery is in charged state, voltage, total voltage, the charge capacity of key monitoring battery cell, with accurate
Differentiate overcharge, the generation of the electric abuse condition such as short circuit；The temperature of battery case and battery modules frame, Battery case pressure are detected simultaneously
And acceleration, monitor the generation of heat abuse and mechanical abuse condition.
Specifically, battery management system obtains the electricity and voltage of battery cell in real time, when there are some battery cells
It overcharges, then disconnects the charging circuit to the battery cell, when the open circuit of some battery cell, then disconnect charge power supply and alarm；Electricity
Pond management system obtains temperature information in real time, when arbitrary temp abnormal parameters, then disconnects charge power supply and alarms.
When power battery is in discharge condition, since discharge process corresponds generally to vehicle traveling, generally there is driving on vehicle
Member and occupant, need emphasis early warning.The variation for mending electricity according to each battery cell of charge balancing first, determines whether single battery
There is micro-short circuit to expand to carry out, early warning is carried out for this kind of battery cell.Detect temperature, the pressure of Battery case and module frame
Power, acceleration determine whether abnormal abuse and act on battery system, if there is this kind of abuse occurs, make early warning.Then
The voltage of monitoring battery cell, temperature, module temperature, Battery case temperature judge whether there is burst battery cell thermal runaway, by
In the single battery of burst thermal runaway, it is equivalent to short circuit battery, voltage can be reduced to the level far below normal voltage, in conjunction with list
Temperature, module temperature, Battery case temperature, carry out real-time early warning.
Specifically, battery management system obtains the voltage of each battery cell in real time, if the electricity of some battery cell
Pressure drop low rate is more than predeterminated voltage fall off rate, then carries out thermal runaway alarm；To ensure accuracy of alarming, if some temperature passes
The temperature anomaly of sensor acquisition, while the voltage drop low rate of the battery cell of the temperature sensor position is more than default electricity
Drops rate then carries out thermal runaway alarm.
In addition, if the parameter fluctuation frequency that acceleration transducer is acquired is greater than the set value, alarm.
When power battery is in static condition, the temperature and voltage of key monitoring battery, if there is the unexpected hair of internal short-circuit
Raw, the voltage of the monomer can be abnormal reduction, and temperature has abnormal raising；The temperature of Battery case and module frame is monitored simultaneously
Degree, pressure, acceleration.
Specifically, battery management system obtains the voltage of each battery cell in real time, if the electricity of some battery cell
Pressure drop low rate is more than predeterminated voltage fall off rate, then carries out thermal runaway alarm.To ensure accuracy of alarming, if some temperature passes
The temperature anomaly of sensor acquisition, while the voltage drop low rate of the battery cell of the temperature sensor position is more than default electricity
Drops rate then carries out thermal runaway alarm.
In addition, battery management system obtains the electricity of each battery cell in real time, if the electricity of some battery cell is remote
Less than the electricity of other battery cells, then charge balancing subsystem is driven to charge for low battery battery cell.
The utility model is exemplarily described above in conjunction with attached drawing, it is clear that the utility model specific implementation not by
The limitation of aforesaid way, as long as using the methodology of the utility model and various unsubstantialities that technical solution carries out change
Into, or it is not improved the design of the utility model and technical solution are directly applied into other occasions, in the utility model
Protection domain within.
Claims (4)
1. a kind of power battery thermal runaway early warning system, battery cell, which is fixed in module frame, constitutes battery unit, multiple batteries
Unit, which is fixed in battery case, constitutes power battery, and the power battery is equipped with battery management system, the battery management system
Acquire total voltage, the power battery total electricity of power battery output bus, it is characterised in that：The battery management system acquisition is every
Voltage, the electricity of a battery cell, the battery management system output alarm signal to interior alarm unit.
2. power battery thermal runaway early warning system according to claim 1, it is characterised in that：Pressure is equipped in the battery case
Force snesor and acceleration transducer, it is described to battery management system that the pressure sensor exports pressure signal in battery case
Acceleration transducer exports current vehicle acceleration state to battery management system.
3. power battery thermal runaway early warning system according to claim 2, it is characterised in that：Each battery unit
It is equipped with temperature sensor on module frame, temperature sensor is fixed on the battery case, each temperature sensor output
Temperature signal is to battery management unit.
4. power battery thermal runaway early warning system according to claim 1,2 or 3, it is characterised in that：Each battery
Monomer is equipped with voltage and electric quantity acquisition unit, and the voltage and power supply collecting unit output signal to battery management unit, institute
It states battery management system and is equipped with charge balancing subsystem, the battery management system output drive signal to charge balancing subsystem
System, the charge balancing subsystem input terminal connect power battery output end, and output end is separately connected each battery cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820483834.6U CN207925620U (en) | 2018-04-08 | 2018-04-08 | A kind of power battery thermal runaway early warning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820483834.6U CN207925620U (en) | 2018-04-08 | 2018-04-08 | A kind of power battery thermal runaway early warning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207925620U true CN207925620U (en) | 2018-09-28 |
Family
ID=63596947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820483834.6U Expired - Fee Related CN207925620U (en) | 2018-04-08 | 2018-04-08 | A kind of power battery thermal runaway early warning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207925620U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108711893A (en) * | 2018-04-08 | 2018-10-26 | 江西优特汽车技术有限公司 | A kind of power battery thermal runaway early warning system and method |
| WO2020220512A1 (en) * | 2019-04-30 | 2020-11-05 | 宁德时代新能源科技股份有限公司 | Thermal runaway detection method, device and system for batteries, and battery management unit |
-
2018
- 2018-04-08 CN CN201820483834.6U patent/CN207925620U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108711893A (en) * | 2018-04-08 | 2018-10-26 | 江西优特汽车技术有限公司 | A kind of power battery thermal runaway early warning system and method |
| WO2020220512A1 (en) * | 2019-04-30 | 2020-11-05 | 宁德时代新能源科技股份有限公司 | Thermal runaway detection method, device and system for batteries, and battery management unit |
| US12027680B2 (en) | 2019-04-30 | 2024-07-02 | Contemporary Amperex Technology Co., Limited | Method, apparatus, system for detecting battery thermal runaway, and battery management unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108711893A (en) | A kind of power battery thermal runaway early warning system and method | |
| CN105904992B (en) | A kind of the battery cell monitoring management system and its monitoring method of electric vehicle | |
| CN110370984A (en) | Power battery thermal runaway method for early warning | |
| CN107611513A (en) | A kind of method for monitoring lithium ion battery of electric automobile thermal runaway | |
| CN202651843U (en) | Battery monitoring device, battery system and electric equipment | |
| CN201781037U (en) | Battery management system of electric automobile | |
| CN103311965B (en) | Batteries in parallel connection group discharge and recharge intelligent management apapratus and method | |
| CN105620304B (en) | Battery pack thermal run away monitoring device and electric automobile | |
| CN106443490B (en) | A kind of fault diagnosis system of battery short circuit | |
| CN102044718A (en) | Power lithium iron phosphate battery pack management system for electric automobiles and working method of system | |
| CN110376530A (en) | Battery internal short-circuit detection device and method | |
| CN107256987A (en) | A kind of electrokinetic cell micro-short circuit detection method | |
| CN206355470U (en) | The automatic fire extinguisher of battery case | |
| CN113437371A (en) | Early warning system and early warning method for thermal runaway of lithium ion battery of new energy automobile | |
| CN207440262U (en) | Dynamic lithium battery group real-time monitoring system | |
| CN202455122U (en) | Device for intelligently managing charge-discharge of battery group in parallel | |
| CN113219353A (en) | BMS-based thermal runaway control method and system | |
| CN207925620U (en) | A kind of power battery thermal runaway early warning system | |
| CN108832686A (en) | Charge circuit and charge circuit detection method | |
| WO2023142896A1 (en) | Circulation control circuit, charging and discharging circuit, and electric device | |
| CN108258340A (en) | A kind of battery system with gas monitoring apparatus | |
| CN103171451A (en) | Battery management system based on co-processor and solid-state relay | |
| CN106696735A (en) | Intelligent monitoring system based on vehicle-mounted lithium battery pack | |
| CN201426046Y (en) | Power management system for car high power lithium battery stack with balancing function | |
| CN212313296U (en) | Battery package thermal runaway early warning system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180928 Termination date: 20210408 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |