CN109301369B - New energy charge and discharge heat control method and battery thermal management system - Google Patents
New energy charge and discharge heat control method and battery thermal management system Download PDFInfo
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- CN109301369B CN109301369B CN201810977243.9A CN201810977243A CN109301369B CN 109301369 B CN109301369 B CN 109301369B CN 201810977243 A CN201810977243 A CN 201810977243A CN 109301369 B CN109301369 B CN 109301369B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/443—Methods for charging or discharging in response to temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
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- 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
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- General Chemical & Material Sciences (AREA)
- Automation & Control Theory (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of new energy charge/discharge control method and battery thermal management system, battery can be worked in normal temperature conditions, while helping to improve the performance of battery.Meanwhile additionally provide it is a set of perfect, reliably, battery thermal management system of good performance, improve safety.The present invention is based on battery temperature, temperature rise and internal resistance control battery heat dissipation and charge and discharge strategies, reliable and effective heat management control can be carried out to battery, it is high to control precision, it is able to ascend the performance of power battery, extend the service life of battery, the security reliability of power battery is promoted, so as to further increase the mileage travelled of electric car.
Description
Technical field
The invention belongs to field of new energy technologies, it is related to the mixed dynamic, battery management method in pure electric vehicle and management system
System, is to be related to new energy charge and discharge heat control method and battery thermal management system more specifically.
Background technique
Since the problems such as traditional fossil energy of global range is increasingly deficient, environmental pollution is serious and greenhouse effects, is more tight
Weight.The clean new energy of accelerated development establishes energy system efficiently, safe, realizes that the sustainable development etc. of new energy becomes
It is particularly significant and urgent.As one of new energy, power battery develops rather rapidly in recent years.Power battery refers to hand over
Logical means of transport provides the battery of power, for the compact battery that energy is provided for portable electronic device,
For example, electric car, electric train, electric bicycle, golf cart provide the battery of power.According to cell reaction original
The difference of reason can be divided into lead-acid power accumulator, Ni-MH power cell, lithium-ion-power cell etc..
Energy source of the power battery as electric vehicle especially pure electric vehicle, running environment is more complicated, often locates
In the charging and discharging state of different size electric current.Charge and discharge process is because not noticeable, and the charge and discharge time is long, due to current battery pipe
Management of charging and discharging strategy in reason system is unreasonable or deficient adaptation management, this service life for resulting in battery greatly shorten；Very
Extremely the energy and power-performance of battery can be seriously affected, to influence there is a situation where causing percentage of batteries to damage because of overheat
Automobile start time and mileage travelled.More fearful, the design of charge-discharge system is unreasonable, will affect charge and discharge process
Caused by battery last overheat weakens the performance of battery when overheating the electrolyte flow that can accelerate in battery, while battery is because of overheat
It smolders, short circuit, leakage, on fire, explosion, brings immeasurable property loss and personal safety hidden danger to user.
Summary of the invention
To solve the above problems, the invention discloses a kind of new energy charge/discharge control method and battery thermal management system,
Battery can be worked in normal temperature conditions, while helping to improve the performance of battery.Meanwhile additionally provide it is a set of perfect, can
It leans on, battery thermal management system of good performance, improves safety.
In order to achieve the above object, the invention provides the following technical scheme:
New energy charge/discharge control method, includes the following steps:
1) when battery temperature T < first temperature threshold, when charging, into pre- Warm status；
2) work as the temperature threshold of T>first, and when T<second temperature threshold value, battery charges normal, discharges；
3) work as T>second temperature threshold value, and when<third temperature threshold, monitor battery temperature rise variation and internal resistance change rate, it is right
Battery carries out cooling and heat dissipation, controls charging and discharging currents:
A) when battery temperature rise > second temperature rise rate threshold value, then while normal charge and discharge, to battery cooling and heat dissipation, and
Control charging and discharging currents, balance charge/discharge electric current；
B) when battery temperature rise < second temperature rise rate threshold value, in normal charging and discharging state；
C) when internal resistance of cell change rate > first internal resistance change rate threshold value, then while normal charge and discharge, to battery into
Row cooling and heat dissipation, until internal resistance of cell change rate < first internal resistance change rate threshold value, and battery temperature is less than the first ginseng of temperature adjustment
Examine value；
4) work as T>third temperature threshold, and when T<four temperature threshold, monitor battery temperature rise variation and internal resistance change rate, and
Cooling and heat dissipation is carried out, charging and discharging currents are controlled:
A) when internal resistance of cell change rate>10%, cooling and heat dissipation is carried out to battery immediately, until internal resistance of cell change rate<
First internal resistance change rate threshold value, and battery temperature is less than temperature and adjusts the second reference value；
B) when battery temperature rise < first temperature rise rate threshold value, and internal resistance of cell change rate < first internal resistance change rate threshold value, then
In normal charging and discharging state；
C) when internal resistance of cell change rate<first internal resistance change rate threshold value, battery temperature rise>the first temperature rise rate threshold value,<the second
When temperature rise rate threshold value, cooling and heat dissipation is carried out to battery, controls charging and discharging currents；
D) right when internal resistance of cell change rate<first internal resistance change rate threshold value, battery temperature rise>second temperature rise rate threshold value
Battery carries out cooling and heat dissipation, and sends alarm signal, if being in charged state, sends charging shutdown signal；If in electric discharge
State then reduces discharge current to can maintain low vehicle speeds state immediately；
5) when T > four temperature threshold, cooling and heat dissipation is carried out to battery, and stop battery charging and discharging, and send alarm signal
Number.
Further, in the step 1) step by step a) in, control charging and discharging currents season electric current is less than or equal to normal
The 80% of electric current.
Further, in the step 4) step by step c) in, control charging and discharging currents season electric current is less than or equal to normal
The 60% of electric current.
The present invention also provides a kind of battery thermal management system, including MCU and the temperature sensor being connect with MCU and
Internal resistance of cell detector, the temperature sensor is for measuring battery pack temperature, and the internal resistance of cell detector is for measuring electricity
Pond internal resistance, the MCU are connect with battery charging and discharging system, cooling and heat dissipation system, and the MCU uses following control method:
1) when battery temperature T < first temperature threshold, when charging, battery thermal management system enters pre- Warm status,
2) work as the temperature threshold of T>first, and when T<second temperature threshold value, battery is normally filled in battery thermal management system transmission
Electricity, discharge information；
3) work as T>second temperature threshold value, and when<third temperature threshold, monitor battery temperature rise variation and internal resistance change rate, and
Cooling and heat dissipation system is opened to control charging and discharging currents；
A) when battery temperature rise > second temperature rise rate threshold value, then while normal charge and discharge, battery thermal management system is sent
Cooling and heat dissipation system is opened, and controls charging and discharging currents, balance charge/discharge electric current；
B) when battery temperature rise < second temperature rise rate threshold value, then in normal charging and discharging state；
C) when internal resistance of cell change rate > first internal resistance change rate threshold value, then while normal charge and discharge, battery thermal
Reason system, which is sent, opens cooling and heat dissipation system, until internal resistance of cell change rate < first internal resistance change rate threshold value, and battery temperature is small
The second reference value is adjusted in temperature；
4) work as T>third temperature threshold, and when T<four temperature threshold, monitor battery temperature rise variation and internal resistance change rate, and
Cooling and heat dissipation system is opened to control charging and discharging currents；
A) when internal resistance of cell change rate > 10%, battery thermal management system is sent opens cooling and heat dissipation system immediately, until
Internal resistance of cell change rate < the first internal resistance change rate threshold value, and battery temperature is less than 28 degree；
B) when battery temperature rise < first temperature rise rate threshold value, and internal resistance of cell change rate < first internal resistance change rate threshold value, then
In normal charging and discharging state；
C) when internal resistance of cell change rate<first internal resistance change rate threshold value, battery temperature rise>the first temperature rise rate threshold value,<the second
When temperature rise rate threshold value, battery thermal management system, which is sent, to be opened cooling and heat dissipation system and controls charging and discharging currents；
D) when internal resistance of cell change rate<first internal resistance change rate threshold value, battery temperature rise>second temperature rise rate threshold value, electricity
Pond heat management system, which is sent, opens cooling and heat dissipation system, and sends alarm signal, if being in charged state, sends charging and closes
Signal；If being in discharge condition, reduce discharge current immediately to low vehicle speeds state can be maintained.
5) when T > four temperature threshold, battery thermal management system, which is sent, opens cooling and heat dissipation system, and closes battery and fill
Discharge system, and send alarm signal.
Further, in the step 1) step by step a) in, control charging and discharging currents season electric current is less than or equal to normal
The 80% of electric current.
Further, in the step 4) step by step c) in, control charging and discharging currents season electric current is less than or equal to normal
The 60% of electric current.
Further, the MCU is also connect with display.
Compared with prior art, the invention has the advantages that and the utility model has the advantages that
The present invention provides a kind of battery heat dissipations and charge and discharge plan controlled based on battery temperature, temperature rise and internal resistance
Slightly, reliable and effective heat management control can be carried out to battery, control precision is high, is able to ascend the performance of power battery, extends
The service life of battery promotes the security reliability of power battery, so as to further increase the mileage travelled of electric car.
Detailed description of the invention
Fig. 1 is battery reasonable working temperature curve graph.
Fig. 2 is new energy charge/discharge control method flow chart provided by the invention.
Fig. 3 is battery thermal management system connection schematic diagram.
Fig. 4 is battery thermal management system control flow frame diagram.
Fig. 5 is battery thermal management system hardware architecture diagram.
Specific embodiment
Technical solution provided by the invention is described in detail below with reference to specific embodiment, it should be understood that following specific
Embodiment is only illustrative of the invention and is not intended to limit the scope of the invention.
There are many power battery type, and optimum working temperature range is also not quite similar, though many documents and materials think, battery
Normal working temperature range passes through many laboratory proofings at -10 DEG C~60 DEG C, and being under -5 DEG C or less and low temperature cannot be normal
Charging, needs to handle by heating, battery temperature, which is warming up to 5 DEG C or more, just to be allowed to charge the battery.Battery temperature simultaneously
Lower than 0 DEG C hereinafter, battery needs low discharging current, etc. temperature to 10 DEG C or more, just can be carried out heavy-current discharge.Therefore we will
The normal working temperature of battery is controlled as far as possible at 0 DEG C or more, and approximately less than 50 DEG C.It was found that when battery temperature is in 25 DEG C
With 45 DEG C between work when, the capacity of battery and internal resistance be all it is very close, when battery temperature is in 45 DEG C or more, battery
Circulating temperature be reduced to 60% hereinafter, such case becomes apparent in charge and discharge, therefore we monitor the internal resistance control of battery
System changes (every group of battery core) 5%, and battery temperature is controlled at 10 DEG C~45 DEG C, as shown in Figure 1.Meanwhile we combine temperature rise
With temperature difference data, charging and discharging currents are controlled.
The difference of environment temperature is referred to as temperature rise, the temperature gap between each battery core in the temperature and battery case of battery battery core
The referred to as temperature difference guarantees that the operating temperature of each battery core is consistent to judge whether each battery core working condition is normal, and it is maximum to define temperature rise
Value is 8 DEG C, 4 DEG C of temperature difference maximum value.
New energy charge/discharge control method provided by the invention, as shown in Fig. 2, including the following steps:
1) when battery temperature T < 0 DEG C, when charging, battery thermal management system enters pre- Warm status,
2) work as T>0 DEG C, and when T<30 DEG C, battery thermal management system transmission battery is charged normal, discharge information；
3) work as T>30 DEG C, and at<45 DEG C, monitor battery temperature rise variation and internal resistance change rate, and open cooling and heat dissipation system
To control charging and discharging currents.
A) as battery temperature rise > 1 DEG C/min, then while normal charge and discharge, battery thermal management system, which is sent, opens cooling
Cooling system, and control charging and discharging currents (electric current is enabled to be less than or equal to the 80% of normal current), balance charge/discharge electric current.
B) as battery temperature rise < 1 DEG C/min, then in normal charging and discharging state.
C) when internal resistance of cell change rate > 5%, then while normal charge and discharge, battery thermal management system, which is sent, to be opened
Cooling and heat dissipation system, while compressor is opened, until internal resistance of cell change rate < 5%, and battery temperature is less than 33 degree.The temperature
Value is that temperature adjusts the first reference value in this example, can according to need and is adjusted.
4) work as T>45 DEG C, and when T<55 DEG C, monitor battery temperature rise variation and internal resistance change rate, and open cooling and heat dissipation system
To control charging and discharging currents.
A) when internal resistance of cell change rate > 10%, battery thermal management system is sent opens cooling and heat dissipation system immediately, simultaneously
Compressor is opened, until internal resistance of cell change rate < 5%, and battery temperature is less than 28 degree.The temperature value is temperature adjustment in this example
Second reference value, can according to need and be adjusted.
B) as battery temperature rise < 0.5 DEG C/min, and internal resistance of cell change rate < 5%, then in normal charging and discharging state；
C) when internal resistance of cell change rate<5%, battery temperature rise>0.5 DEG C/min, when<1 DEG C/min, battery thermal management system hair
It send and opens cooling and heat dissipation system and control charging and discharging currents (electric current is enabled to be less than or equal to the 60% of normal current)；
D) when internal resistance of cell change rate<5%, battery temperature rise>1 DEG C/min, battery thermal management system, which is sent, opens cooling
Cooling system, and alarm signal is sent, if being in charged state, send charging shutdown signal；If being in discharge condition, stand
Reduce discharge current to low vehicle speeds state can be maintained.
5) when T > 55 DEG C, battery thermal management system, which is sent, opens cooling and heat dissipation system, and closes battery charging and discharging system,
And send alarm signal.
It should be noted that above each judgment threshold: 0 DEG C, 30 DEG C, 45 DEG C, 55 DEG C can according to need and be adjusted, because
This can name it using the first temperature threshold, second temperature threshold value, third temperature threshold, the 4th temperature threshold, the first temperature
Spend threshold value < second temperature threshold value < third temperature threshold < the 4th temperature threshold.Likewise, temperature rise judgment threshold 0.5 DEG C/min and 1
DEG C/min can according to need and be adjusted, the first temperature rise rate threshold value can be used, the second temperature rise rate threshold value names it, and
First temperature rise rate threshold value < the second temperature rise rate threshold value.And internal resistance change rate 5%, 10% mentioned above also can be used first
Internal resistance change rate threshold value, the second internal resistance change rate threshold value name it, and the first internal resistance change rate threshold value < second internal resistance change rate
Threshold value.
The present invention also provides a kind of battery thermal management systems, for realizing above-mentioned charge and discharge heat control method, such as Fig. 3 institute
Show, connect by temperature sampler, resolver (computing module in MCU), internal resistance of cell detector with battery pack, obtains battery
Temperature, internal resistance data of group, and obtain carrying out comprehensive descision and management after temperature rise data, complete control framework as shown in figure 4,
Based on temperature, internal resistance, temperature rise detailed control method referring to above-mentioned charge and discharge heat control method.
Specifically, as shown in figure 5, this system hardware is constituted including MCU, temperature sensor and internal resistance of cell detector,
Temperature sensor and internal resistance of cell detector are connect with battery pack, and MCU is collected from temperature sensor and internal resistance of cell detector
The temperature and internal resistance signal of battery pack are calculated temperature rise rate and internal resistance of cell change rate, are based on according to these signal datas
Built in MCU above-mentioned control method control charge-discharge system (including charhing unit, discharge cell), cooling and heat dissipation system (including
The equipment such as common air-cooled or liquid cooling can be used in cooling module and compressor, cooling module) battery pack is controlled.This
Outside, as shown in figure 5, MCU is also connect with display, it is used for displays temperature information.
The technical means disclosed in the embodiments of the present invention is not limited only to technological means disclosed in above embodiment, further includes
Technical solution consisting of any combination of the above technical features.It should be pointed out that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (7)
1. new energy charge/discharge control method, which comprises the steps of:
1) when battery temperature T < first temperature threshold, when charging, into pre- Warm status；
2) work as the temperature threshold of T>first, and when T<second temperature threshold value, battery charges normal, discharges；
3) work as T>second temperature threshold value, and when<third temperature threshold, battery temperature rise variation and internal resistance change rate are monitored, to battery
Cooling and heat dissipation is carried out, charging and discharging currents are controlled:
A) when battery temperature rise > second temperature rise rate threshold value to battery cooling and heat dissipation, and controls then while normal charge and discharge
Charging and discharging currents, balance charge/discharge electric current；
B) when battery temperature rise < second temperature rise rate threshold value, in normal charging and discharging state；
C) when internal resistance of cell change rate > first internal resistance change rate threshold value, then while normal charge and discharge, battery is dropped
Temperature heat dissipation, until internal resistance of cell change rate < first internal resistance change rate threshold value, and battery temperature is less than the first reference of temperature adjustment
Value；
4) work as T>third temperature threshold, and when T<four temperature threshold, monitor battery temperature rise variation and internal resistance change rate, and carry out
Cooling and heat dissipation controls charging and discharging currents:
A) when internal resistance of cell change rate>10%, cooling and heat dissipation is carried out to battery immediately, until internal resistance of cell change rate<the first
Internal resistance change rate threshold value, and battery temperature is less than temperature and adjusts the second reference value；
B) when battery temperature rise < first temperature rise rate threshold value, and internal resistance of cell change rate < first internal resistance change rate threshold value, then just
Normal charging and discharging state；
C) when internal resistance of cell change rate<first internal resistance change rate threshold value, battery temperature rise>the first temperature rise rate threshold value, the<the second temperature rise
When rate-valve value, cooling and heat dissipation is carried out to battery, controls charging and discharging currents；
D) when internal resistance of cell change rate<first internal resistance change rate threshold value, battery temperature rise>second temperature rise rate threshold value, to battery
Cooling and heat dissipation is carried out, and sends alarm signal, if being in charged state, sends charging shutdown signal；If being in discharge condition,
Then reduce discharge current immediately to low vehicle speeds state can be maintained；
5) when T > four temperature threshold, cooling and heat dissipation is carried out to battery, and stop battery charging and discharging, and send alarm signal.
2. new energy charge/discharge control method according to claim 1, it is characterised in that: in the step 1) step by step a)
In, control charging and discharging currents season electric current is less than or equal to the 80% of normal current.
3. new energy charge/discharge control method according to claim 1, it is characterised in that: in the step 4) step by step c)
In, control charging and discharging currents season electric current is less than or equal to the 60% of normal current.
4. battery thermal management system, it is characterised in that: examined including MCU and the temperature sensor being connect with MCU and the internal resistance of cell
Device is surveyed, for the temperature sensor for measuring battery pack temperature, the internal resistance of cell detector is described for measuring the internal resistance of cell
MCU is connect with battery charging and discharging system, cooling and heat dissipation system, and the MCU uses following control method:
1) when battery temperature T < first temperature threshold, when charging, battery thermal management system enters pre- Warm status,
2) work as the temperature threshold of T>first, and when T<second temperature threshold value, battery thermal management system transmission charges normal battery, puts
Power information；
3) work as T>second temperature threshold value, and when<third temperature threshold, monitor battery temperature rise variation and internal resistance change rate, and open
Cooling and heat dissipation system controls charging and discharging currents；
A) when battery temperature rise > second temperature rise rate threshold value, then while normal charge and discharge, battery thermal management system, which is sent, to be opened
Cooling and heat dissipation system, and charging and discharging currents are controlled, balance charge/discharge electric current；
B) when battery temperature rise < second temperature rise rate threshold value, then in normal charging and discharging state；
C) when internal resistance of cell change rate > first internal resistance change rate threshold value, then while normal charge and discharge, battery thermal management system
System, which is sent, opens cooling and heat dissipation system, until internal resistance of cell change rate < first internal resistance change rate threshold value, and battery temperature is less than temperature
Degree the first reference value of adjustment；
4) work as T>third temperature threshold, and when T<four temperature threshold, monitor battery temperature rise variation and internal resistance change rate, and open
Cooling and heat dissipation system controls charging and discharging currents；
A) when internal resistance of cell change rate > 10%, battery thermal management system is sent opens cooling and heat dissipation system immediately, until battery
Internal resistance change rate < the first internal resistance change rate threshold value, and battery temperature is less than temperature and adjusts the second reference value；
B) when battery temperature rise < first temperature rise rate threshold value, and internal resistance of cell change rate < first internal resistance change rate threshold value, then just
Normal charging and discharging state；
C) when internal resistance of cell change rate<first internal resistance change rate threshold value, battery temperature rise>the first temperature rise rate threshold value, the<the second temperature rise
When rate-valve value, battery thermal management system, which is sent, to be opened cooling and heat dissipation system and controls charging and discharging currents；
D) when internal resistance of cell change rate<first internal resistance change rate threshold value, battery temperature rise>second temperature rise rate threshold value, battery heat
Management system, which is sent, opens cooling and heat dissipation system, and sends alarm signal, if being in charged state, sends charging and closes letter
Number；If being in discharge condition, reduce discharge current immediately to low vehicle speeds state can be maintained；
5) when T > four temperature threshold, battery thermal management system, which is sent, opens cooling and heat dissipation system, and closes battery charging and discharging
System, and send alarm signal.
5. battery thermal management system according to claim 4, it is characterised in that: in the step 1) step by step a) in, control
Charging and discharging currents season electric current processed is less than or equal to the 80% of normal current.
6. battery thermal management system according to claim 4, it is characterised in that: in the step 4) step by step c) in, control
Charging and discharging currents season electric current processed is less than or equal to the 60% of normal current.
7. battery thermal management system according to claim 4, it is characterised in that: the MCU is also connect with display.
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| EP4345978A1 (en) * | 2022-09-29 | 2024-04-03 | Greenworks (Jiangsu) Co., Ltd. | Battery thermal management system and battery thermal management control method |
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| CN110190349B (en) * | 2019-04-30 | 2022-09-27 | 蜂巢能源科技有限公司 | Multi-stage temperature control discharging method, device and system for battery |
| CN115298870A (en) * | 2021-11-25 | 2022-11-04 | 宁德新能源科技有限公司 | Electrochemical device, method for controlling electrochemical device, electronic device, and storage medium |
| CN114179617A (en) * | 2021-12-10 | 2022-03-15 | 山东爱德邦智能科技有限公司 | Battery spontaneous combustion control method and device and medium thereof |
| CN115656846A (en) * | 2022-11-10 | 2023-01-31 | 无锡九合动力科技有限公司 | New energy automobile electric control system and method |
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