CN113471567B - Battery pack temperature difference control method, device, equipment and storage medium - Google Patents

Battery pack temperature difference control method, device, equipment and storage medium Download PDF

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Publication number
CN113471567B
CN113471567B CN202110659643.7A CN202110659643A CN113471567B CN 113471567 B CN113471567 B CN 113471567B CN 202110659643 A CN202110659643 A CN 202110659643A CN 113471567 B CN113471567 B CN 113471567B
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battery pack
temperature
water pump
temperature difference
preset
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CN113471567A (en
Inventor
邹姚辉
张志强
马洁高
李东萍
伍健
何佳健
王文洋
蒋中洲
卢楚辉
余云霞
黄灏
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Dongfeng Liuzhou Motor Co Ltd
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Dongfeng Liuzhou Motor Co Ltd
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
    • 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
    • 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
    • H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
    • 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
    • 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
    • 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
    • H01M10/635—Control systems based on ambient temperature
    • 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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • 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
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Automation & Control Theory (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The invention discloses a battery pack temperature difference control method, a battery pack temperature difference control device, battery pack temperature difference control equipment and a battery pack temperature difference control storage medium. The method comprises the following steps: acquiring the maximum cell temperature and the minimum cell temperature inside a battery pack, and determining the cell temperature difference; if the working state of the battery pack is a slow charging state and the current battery core temperature difference is greater than or equal to a first preset temperature value, controlling a battery pack heater to be started with a water pump so as to reduce the battery core temperature difference; when the current water temperature of the water inlet of the battery pack reaches the current maximum battery core temperature, controlling the heater of the battery pack to be closed; and when the processed battery core temperature difference is smaller than a second preset temperature value, controlling the water pump to be closed, wherein the second preset temperature value is smaller than the first preset temperature value. When the battery pack works in a slow charging state, the switch of the heater and the water pump is controlled according to the battery core temperature difference obtained in real time and the water temperature of the water inlet, the internal temperature difference is balanced, so that the battery core works in the battery pack under the temperature difference which is small and suitable, and the problem of overlarge temperature difference in the battery pack is solved.

Description

Battery pack temperature difference control method, device, equipment and storage medium
Technical Field
The invention relates to the technical field of electric automobiles, in particular to a battery pack temperature difference control method, device, equipment and storage medium.
Background
When the battery of the electric automobile works in a low-temperature environment, the performance of the lithium ion battery can be reduced, and even when the battery works, the safety risk of fire caused by internal short circuit due to lithium precipitation of the battery cell is caused, and when the battery works at a high temperature, the safety risk of thermal runaway caused by high-temperature aggregation of the battery cell is caused. Need carry out the external heating to liquid cooling battery package under the low temperature environment winter, work need carry out the external cooling to liquid cooling battery package under the high temperature environment summer, and at heating and cooling process, electric core in the battery package is because the heat transfer is inhomogeneous, the too big problem of difference in temperature appears, leads to the inconsistency of electric core in the battery package to strengthen, and the whole package capacity decay of battery package accelerates, the too big trouble of difference in temperature appears even, influences the customer and drives and experience.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a battery pack temperature difference control method, a battery pack temperature difference control device, battery pack temperature difference control equipment and a storage medium, and aims to solve the technical problem of overlarge temperature difference inside a battery pack.
In order to achieve the above object, the present invention provides a method for controlling a temperature difference of a battery pack, the method comprising the steps of:
acquiring the maximum cell temperature and the minimum cell temperature inside a battery pack, and determining a cell temperature difference according to the maximum cell temperature and the minimum cell temperature;
acquiring the current working state of the battery pack;
when the current working state is a slow charging state, judging whether the current battery core temperature difference is greater than or equal to a first preset temperature value;
when the current electric core temperature difference is larger than or equal to the first preset temperature value, sending a starting control signal to a battery pack heater and a water pump to control the battery pack heater and the water pump to be started so as to reduce the electric core temperature difference of the battery pack;
acquiring the current water temperature of a water inlet of the battery pack, and sending a closing control signal to the battery pack heater to control the battery pack heater to be closed when the current water temperature reaches the current maximum battery core temperature;
and when the processed battery core temperature difference is smaller than a second preset temperature value, sending a closing control signal to the water pump to control the water pump to be closed, wherein the second preset temperature value is smaller than the first preset temperature value.
Optionally, after obtaining the current operating state of the battery pack, the method further includes:
when the current working state is a quick charging state, sending a starting control signal to a battery pack heater and a water pump to control the battery pack heater and the water pump to be started;
when the current cell temperature difference is greater than or equal to a third preset temperature value, sending a closing control signal to the battery pack heater to control the battery pack heater to be closed, wherein the third preset temperature value is greater than the first preset temperature value;
and when the processed battery core temperature difference is smaller than a fourth preset temperature value, sending a closing control signal to the water pump to control the water pump to be closed, wherein the fourth preset temperature value is larger than the second temperature value.
Optionally, when the current working state is a fast charging state, sending a start control signal to the battery pack heater and the water pump to control the battery pack heater and the water pump to be started, where the method further includes:
when the current battery core temperature difference is smaller than a third preset temperature value, heating the battery pack according to a preset calibration temperature value;
when the current minimum cell temperature is greater than or equal to the preset calibration temperature value, sending a closing control signal to the battery pack heater to control the battery pack heater to be closed;
and when the processed battery core temperature difference is smaller than a fourth preset temperature value, sending a closing control signal to the water pump to control the water pump to be closed.
Optionally, when the current working state is the fast charging state, send a start control signal to the battery pack heater and the water pump, control the battery pack heater and the water pump to start, including:
when the current working state is a quick charging state, acquiring the current environment temperature;
judging whether the current environment temperature is smaller than a preset environment low-temperature value or not;
and when the current environment temperature is lower than the preset environment low-temperature value, sending a starting control signal to the battery pack heater and the water pump to control the battery pack heater and the water pump to be started.
Optionally, after obtaining the current operating state of the battery pack, the method further includes:
when the current working state is a discharging state, judging whether the current battery core temperature difference is larger than or equal to a fifth preset temperature value;
when the current battery core temperature difference is greater than or equal to the fifth preset temperature value, sending a starting control signal to a water pump to control the water pump to be started;
and when the processed battery core temperature difference is smaller than a sixth preset temperature value, sending a closing control signal to the water pump to control the water pump to be closed, wherein the sixth preset temperature value is smaller than the fifth preset temperature value.
Optionally, when the processed battery core temperature difference is smaller than a sixth preset temperature value, a closing control signal is sent to the water pump, and after the water pump is controlled to be closed, the method further includes:
and when the currently acquired battery cell temperature difference is greater than or equal to the fifth preset temperature value, sending a starting control signal to the water pump again to control the water pump to be started.
Optionally, after obtaining the current operating state of the battery pack, the method further includes:
when the current working state is a discharging state, judging whether the current minimum cell temperature is a first preset module temperature value or not;
when the current minimum cell temperature is the first preset module temperature value, sending a starting control signal to a battery pack heater and a water pump to control the battery pack heater and the water pump to be started;
when the processed minimum cell temperature is a second preset module temperature value, sending a closing control signal to the battery pack heater and the water pump to control the battery pack heater and the water pump to be closed, wherein the second preset module temperature value is larger than the first preset module temperature value.
In addition, in order to achieve the above object, the present invention further provides a temperature difference control device for a battery pack, including:
the battery pack comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring the maximum cell temperature and the minimum cell temperature in the battery pack and determining the cell temperature difference according to the maximum cell temperature and the minimum cell temperature;
the acquisition module is also used for acquiring the current working state of the battery pack;
the judging module is used for judging whether the current battery core temperature difference is larger than or equal to a first preset temperature value or not when the current working state is a slow charging state;
the control module is used for sending a starting control signal to the battery pack heater and the water pump when the current battery core temperature difference is larger than or equal to the first preset temperature value, and controlling the battery pack heater and the water pump to be started so as to reduce the battery core temperature difference of the battery pack;
the control module is further configured to obtain a current water temperature of the water inlet of the battery pack, and send a shutdown control signal to the battery pack heater to control the shutdown of the battery pack heater when the current water temperature reaches a current maximum cell temperature;
the control module is further configured to send a closing control signal to the water pump to control the water pump to be closed when the processed battery core temperature difference is smaller than a second preset temperature value, where the second preset temperature value is smaller than the first preset temperature value.
In addition, in order to achieve the above object, the present invention also provides a battery pack temperature difference control apparatus, including: a memory, a processor, and a battery pack temperature differential control program stored on the memory and executable on the processor, the battery pack temperature differential control program configured to implement the battery pack temperature differential control method as described above.
In addition, in order to achieve the above object, the present invention further provides a storage medium having a battery pack temperature difference control program stored thereon, wherein the battery pack temperature difference control program, when executed by a processor, implements the battery pack temperature difference control method as described above.
The method comprises the steps of obtaining the maximum cell temperature and the minimum cell temperature in the battery pack, and determining the cell temperature difference according to the maximum cell temperature and the minimum cell temperature; acquiring the current working state of the battery pack; when the current working state is a slow charging state, judging whether the current battery core temperature difference is larger than or equal to a first preset temperature value; when the current cell temperature difference is greater than or equal to a first preset temperature value, sending a starting control signal to a battery pack heater and a water pump to control the battery pack heater and the water pump to be started so as to reduce the cell temperature difference of the battery pack; the method comprises the steps of obtaining the current water temperature of a water inlet of a battery pack, and sending a closing control signal to a battery pack heater to control the battery pack heater to be closed when the current water temperature reaches the current maximum battery core temperature; and when the processed battery core temperature difference is smaller than a second preset temperature value, sending a closing control signal to the water pump to control the water pump to be closed, wherein the second preset temperature value is smaller than the first preset temperature value. In this way, when the battery package work was in the state of filling slowly, according to the temperature difference of the electric core that acquires in real time and the temperature control heater of water inlet and the switch of water pump to carry out the equilibrium to the inside difference in temperature of battery package, electric core work in making the battery package has solved the too big problem of the inside difference in temperature of battery package under the little and suitable temperature of difference in temperature, has reduced the whole packet capacity decay rate of battery package, improves battery package life, promotes the customer and drives and take experience.
Drawings
Fig. 1 is a schematic structural diagram of a battery pack temperature difference control device of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a temperature difference control method for a battery pack according to a first embodiment of the present invention;
FIG. 3 is a schematic flow chart illustrating a temperature difference control method for a battery pack according to a second embodiment of the present invention;
FIG. 4 is a schematic flow chart illustrating a method for controlling temperature difference of a battery pack according to a third embodiment of the present invention;
fig. 5 is a block diagram illustrating a temperature difference control apparatus for a battery pack according to a first embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a battery pack temperature difference control device in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the pack temperature difference control apparatus may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a Wireless interface (e.g., a Wireless-Fidelity (Wi-Fi) interface). The Memory 1005 may be a Random Access Memory (RAM) or a Non-Volatile Memory (NVM), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration shown in fig. 1 does not constitute a limitation of the temperature difference control device for a battery pack, and may include more or fewer components than those shown, or some components in combination, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a storage medium, may include therein an operating system, a network communication module, a user interface module, and a battery pack temperature difference control program.
In the battery pack temperature difference control apparatus shown in fig. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 of the battery pack temperature difference control device according to the present invention may be disposed in the battery pack temperature difference control device, and the battery pack temperature difference control device invokes the battery pack temperature difference control program stored in the memory 1005 through the processor 1001 and executes the battery pack temperature difference control method according to the embodiment of the present invention.
An embodiment of the present invention provides a method for controlling a temperature difference of a battery pack, and referring to fig. 2, fig. 2 is a schematic flow diagram of a first embodiment of the method for controlling the temperature difference of the battery pack according to the present invention.
In this embodiment, the method for controlling the temperature difference of the battery pack includes the following steps:
step S10: the method comprises the steps of obtaining the maximum cell temperature and the minimum cell temperature inside a battery pack, and determining the cell temperature difference according to the maximum cell temperature and the minimum cell temperature.
It is understood that the execution subject of the embodiment is the battery pack temperature difference control device, and the battery pack temperature difference control device may be a battery management controller, or may be a controller, a processor, and the like, which are in communication connection with the battery management controller, the battery pack heater, the water pump, and each temperature sensor, and the embodiment is not limited thereto.
It should be noted that, in this embodiment, temperature collection points are set at different positions of the battery pack, a plurality of electrical core temperature values are obtained through the temperature sensors installed at the temperature collection points, the electrical core temperature value with the largest value among the plurality of electrical core temperature values collected at a certain time is used as the maximum electrical core temperature corresponding to the time, the electrical core temperature value with the smallest value among the plurality of electrical core temperature values collected at a certain time is used as the minimum electrical core temperature corresponding to the time, and the electrical core temperature difference is obtained by subtracting the minimum electrical core temperature from the maximum electrical core temperature.
Step S20: and acquiring the current working state of the battery pack.
It should be understood that the current operating state of the battery pack is determined according to the battery management system, and includes a slow charge state, a fast charge state, and a discharge state. The battery management system determines the current working state of the battery pack according to the connection state and the voltage of the charging port and the running parameters of the automobile.
Step S30: and when the current working state is a slow charging state, judging whether the current battery core temperature difference is greater than or equal to a first preset temperature value.
The slow charging state refers to that the battery pack is in a normal charging state, when the battery pack is in the slow charging state, the charging current is generally about 8-32A, the charging power is generally about 1.5-21kw, and the charging time is longer. The first preset temperature value is a temperature value obtained by calibrating a slow charge test on the battery pack in advance, and when the current battery core temperature difference is greater than or equal to the first preset temperature value, the current battery core temperature difference is represented to be too large, and a corresponding control scheme is required to be executed to reduce the battery core temperature difference.
Step S40: and when the current electric core temperature difference is greater than or equal to the first preset temperature value, sending a starting control signal to a battery pack heater and a water pump to control the battery pack heater and the water pump to be started so as to reduce the electric core temperature difference of the battery pack.
It can be understood that the battery pack in this embodiment is a liquid-cooled battery pack, and when the current temperature difference of the electric core is greater than or equal to the first preset temperature value, the heater of the battery pack and the water pump are started, so that liquid circulates in the heater, the water pump and the liquid-cooled battery pack, and the temperature in the electric core is balanced based on the thermal diffusion principle.
Step S50: and obtaining the current water temperature of the water inlet of the battery pack, and sending a closing control signal to the battery pack heater to control the battery pack heater to be closed when the current water temperature reaches the current maximum battery core temperature.
It should be noted that, the battery pack temperature difference control device of this embodiment acquires the maximum electrical core temperature and the minimum electrical core temperature of the battery pack in real time, and after controlling the battery pack heater and the water pump to be turned on, sends a collecting signal to the temperature sensor installed at the water inlet of the battery pack, so that the temperature sensor collects the water temperature of the water inlet of the battery pack in real time.
Step S60: and when the processed battery core temperature difference is smaller than a second preset temperature value, sending a closing control signal to the water pump to control the water pump to be closed, wherein the second preset temperature value is smaller than the first preset temperature value.
It can be understood that the second preset temperature value is an optimum cell temperature difference value determined in advance according to the slow charging efficiency of the battery pack, the processed cell temperature difference refers to the cell temperature obtained in real time after the cooling liquid is circulated and processed under the control of the step S40 and the step S50, when the heater of the battery pack is turned off, the temperature of liquid flowing into the battery pack is the maximum cell temperature, based on the thermal diffusion principle, the temperature of a position where the cell temperature is small in the battery pack is increased, the temperature of a position where the cell temperature is large in the battery pack is reduced, so that the cell temperature difference is reduced, when the obtained cell temperature difference is smaller than the second preset temperature value in real time, the cell temperature difference inside the characterization battery is small enough, and at this time, the water pump is controlled to be turned off.
In the concrete implementation, the first preset temperature value is 7 ℃, the second preset temperature value is 4 ℃, when the battery pack is in a slow charging state, and the maximum and minimum electric core temperature difference reaches 7 ℃, the heater and the water pump of the battery pack are controlled to be started, heating is stopped when the water temperature at the water inlet of the battery pack reaches the maximum electric core temperature value, the water pump is continuously operated at full power, based on the thermal diffusion principle, the maximum electric core temperature, the minimum electric core temperature and the cooling liquid temperature can approach to an intermediate value until the electric core temperature difference inside the battery pack is less than 4 ℃, and the water pump is controlled to stop operating.
In the embodiment, the maximum cell temperature and the minimum cell temperature inside the battery pack are obtained, and the cell temperature difference is determined according to the maximum cell temperature and the minimum cell temperature; acquiring the current working state of the battery pack; when the current working state is a slow charging state, judging whether the current battery core temperature difference is larger than or equal to a first preset temperature value; when the current cell temperature difference is greater than or equal to a first preset temperature value, sending a starting control signal to a battery pack heater and a water pump to control the battery pack heater and the water pump to be started so as to reduce the cell temperature difference of the battery pack; the method comprises the steps of obtaining the current water temperature of a water inlet of a battery pack, and sending a closing control signal to a battery pack heater to control the battery pack heater to be closed when the current water temperature reaches the current maximum battery core temperature; and when the processed battery core temperature difference is smaller than a second preset temperature value, sending a closing control signal to the water pump to control the water pump to be closed, wherein the second preset temperature value is smaller than the first preset temperature value. In this way, when the battery package work was in the state of filling slowly, according to the temperature difference of the electric core that acquires in real time and the temperature control heater of water inlet and the switch of water pump to carry out the equilibrium to the inside difference in temperature of battery package, electric core work in making the battery package has solved the too big problem of the inside difference in temperature of battery package under the little and suitable temperature of difference in temperature, has reduced the whole packet capacity decay rate of battery package, improves battery package life, promotes the customer and drives and take experience.
Referring to fig. 3, fig. 3 is a schematic flow chart of a temperature difference control method for a battery pack according to a second embodiment of the present invention.
Based on the first embodiment, after the step S20, the method for controlling a temperature difference of a battery pack according to this embodiment further includes:
step S201: and when the current working state is a quick charging state, sending a starting control signal to the battery pack heater and the water pump to control the battery pack heater and the water pump to be started.
It can be understood that when the battery pack is in a slow charging state, the charging current and the charging voltage are generally 150-400A and 200-750V, and the charging power is more than 50 kW.
Specifically, the step S201 includes: when the current working state is a quick charging state, acquiring the current environment temperature; judging whether the current environment temperature is smaller than a preset environment low-temperature value or not; and when the current environment temperature is lower than the preset environment low-temperature value, sending a starting control signal to the battery pack heater and the water pump to control the battery pack heater and the water pump to be started.
It should be noted that, when the current working state is the quick charge state, the current ambient temperature is determined through the ambient temperature sensor installed on the vehicle, whether the battery pack works in a cold environment is determined according to the current ambient temperature, the preset ambient low temperature value can be set according to actual conditions, the battery pack works in the environment with the preset ambient low temperature value, the quick charge efficiency is influenced, and at the moment, the heater and the water pump are controlled to be started to heat the battery pack, so that the quick charge efficiency is improved.
Step S202: when the current electric core temperature difference is larger than or equal to a third preset temperature value, sending a closing control signal to the battery pack heater to control the battery pack heater to be closed, wherein the third preset temperature value is larger than the first preset temperature value.
It can be understood that the third preset temperature value is a temperature value obtained by calibrating a quick charge test on the battery pack in advance, when the current battery core temperature difference is greater than or equal to the third preset temperature value, the current battery core temperature difference is represented to be too large, and a corresponding control scheme needs to be executed to reduce the battery core temperature difference.
Step S203: and when the processed battery core temperature difference is smaller than a fourth preset temperature value, sending a closing control signal to the water pump to control the water pump to be closed, wherein the fourth preset temperature value is larger than the second temperature value.
It should be noted that the fourth preset temperature value is an optimal cell temperature difference value determined in advance according to the fast charging efficiency of the battery pack, in order to reduce the charging time of the battery pack, the set fourth preset temperature value is smaller than a second temperature value corresponding to a slow charging state, the processed cell temperature difference refers to a cell temperature obtained in real time after the cooling liquid circulation processing under the control of steps S201 and S202, and when the obtained cell temperature difference is smaller than the fourth preset temperature value, it is indicated that the cell temperature difference inside the battery is small enough, and at this time, the water pump is controlled to be turned off.
It can be understood that the third preset temperature value is 9 ℃, the fourth preset temperature value is 5 ℃, when the battery pack is in a fast charging state and the ambient temperature is lower than-5 ℃, the heater of the battery pack and the water pump are controlled to be started, when the maximum and minimum cell temperature difference reaches 9 ℃, the heater of the battery pack is controlled to be closed, the water pump is continuously operated at full power, based on the thermal diffusion principle, the maximum cell temperature, the minimum cell temperature and the coolant temperature can approach to an intermediate value until the cell temperature difference inside the battery pack is lower than 5 ℃, and the water pump is controlled to stop operating.
Further, after the step S201, the method further includes: when the current battery core temperature difference is smaller than a third preset temperature value, heating the battery pack according to a preset calibration temperature value; when the current minimum cell temperature is greater than or equal to the preset calibration temperature value, sending a closing control signal to the battery pack heater to control the battery pack heater to be closed; and when the processed battery core temperature difference is smaller than a fourth preset temperature value, sending a closing control signal to the water pump to control the water pump to be closed.
It should be noted that the preset calibration temperature value is a temperature value obtained by calibrating a quick charge test on the battery pack in advance, and in specific implementation, the preset calibration temperature value can be set to 21 ℃, when the temperature difference of the battery cell is less than 9 ℃, the minimum temperature of the battery cell of the battery pack reaches 21 ℃ through the heater of the battery pack, the heater of the battery pack is controlled to be turned off, and at this moment, the temperature difference of the battery cell is reduced in the circulation process of the cooling liquid until the temperature difference of the battery cell is less than 5 ℃, and the water pump is controlled to be turned off.
In the embodiment, the maximum cell temperature and the minimum cell temperature inside the battery pack are obtained, and the cell temperature difference is determined according to the maximum cell temperature and the minimum cell temperature; acquiring the current working state of the battery pack; when the current working state is a quick charging state, sending a starting control signal to the battery pack heater and the water pump to control the battery pack heater and the water pump to be started; when the current electric core temperature difference is larger than or equal to a third preset temperature value, sending a closing control signal to the battery pack heater to control the battery pack heater to be closed, wherein the third preset temperature value is larger than the first preset temperature value; and when the processed battery core temperature difference is smaller than a fourth preset temperature value, sending a closing control signal to the water pump to control the water pump to be closed, wherein the fourth preset temperature value is larger than the second temperature value. In this way, work in the state of filling soon at the battery package, according to the switch of the electric core difference in temperature control heater that acquires in real time and water pump, in order to carry out the equilibrium to the inside difference in temperature of battery package, the third temperature value of predetermineeing under the state of this embodiment of filling soon is greater than the first temperature value of predetermineeing under the state of filling slowly, reduce battery package charge time, make electric core work in the battery package under the little and suitable temperature of difference in temperature, the too big problem of the inside difference in temperature of battery package has been solved, the whole packet capacity decay rate of battery package has been reduced, improve battery package life, promote the customer and drive and take experience.
Referring to fig. 4, fig. 4 is a schematic flow chart of a temperature difference control method for a battery pack according to a third embodiment of the present invention.
Based on the first embodiment, after the step S20, the method for controlling a temperature difference of a battery pack according to this embodiment further includes:
step S204: and when the current working state is a discharging state, judging whether the current battery core temperature difference is greater than or equal to a fifth preset temperature value.
It can be understood that the fifth preset temperature value is a temperature value obtained by calibrating a discharge test performed on the battery pack in advance, and when the battery pack is in a discharge state and the current battery core temperature difference is greater than or equal to the fifth preset temperature value, it represents that the current battery core temperature difference is too large, and a corresponding control scheme needs to be executed to reduce the battery core temperature difference.
Step S205: and when the current battery core temperature difference is greater than or equal to the fifth preset temperature value, sending a starting control signal to the water pump to control the water pump to be started.
Step S206: and when the processed battery core temperature difference is smaller than a sixth preset temperature value, sending a closing control signal to the water pump to control the water pump to be closed, wherein the sixth preset temperature value is smaller than the fifth preset temperature value.
It should be noted that the sixth preset temperature value is an optimum cell temperature difference value determined in advance according to the discharge efficiency of the battery pack, the processed cell temperature difference refers to a cell temperature obtained in real time after the coolant is circulated and processed under the control of step S205, when the cell temperature difference obtained in real time is smaller than the sixth preset temperature value, it is indicated that the cell temperature difference inside the battery is small enough, and at this time, the water pump is controlled to be turned off.
Further, after the step S206, the method further includes: and when the currently acquired battery cell temperature difference is greater than or equal to the fifth preset temperature value, sending a starting control signal to the water pump again to control the water pump to be started.
In specific implementation, the fifth preset temperature value is 9 ℃, the sixth preset temperature value is 5 ℃, when the battery pack is in a discharge state and the maximum and minimum cell temperature difference reaches 9 ℃, the water pump is controlled to start, based on a thermal diffusion principle, the maximum cell temperature, the minimum cell temperature and the coolant temperature approach to an intermediate value until the cell temperature difference inside the battery pack is less than 5 ℃, and the water pump is controlled to stop running. The method comprises the steps of acquiring the maximum and minimum cell temperature inside the battery pack in real time, determining whether to start a water pump according to the cell temperature difference acquired in real time, controlling the water pump to be turned on after the water pump is controlled to be turned off, and controlling the water pump to be turned on if the cell temperature difference inside the battery pack reaches 9 ℃ again, so that the cell temperature difference is always in a proper state when the battery pack works in a discharging state.
Further, after the step S20, the method further includes: when the current working state is a discharging state, judging whether the current minimum cell temperature is a first preset module temperature value or not; when the current minimum cell temperature is the first preset module temperature value, sending a starting control signal to a battery pack heater and a water pump to control the battery pack heater and the water pump to be started; when the processed minimum cell temperature is a second preset module temperature value, sending a closing control signal to the battery pack heater and the water pump to control the battery pack heater and the water pump to be closed, wherein the second preset module temperature value is larger than the first preset module temperature value.
It should be understood that the first preset module temperature value is a module low-temperature value set in advance, when the battery pack works under the condition that the current minimum cell temperature is lower than the first preset module temperature value, the battery pack is in a low-temperature discharge state, the discharge efficiency is low, the second preset module temperature value is set in advance according to the temperature corresponding to the normal work of the battery pack, in the concrete implementation, the first preset module temperature value is set to be 0 ℃, the second preset module temperature value is set to be 5 ℃, the battery pack is in a discharge state, the current minimum cell temperature is 0 ℃, a battery pack heater and a water pump are started, the battery pack is heated until the current minimum cell temperature is 5 ℃, and the battery pack heater and the water pump are controlled to be turned off.
In the embodiment, the maximum cell temperature and the minimum cell temperature inside the battery pack are obtained, and the cell temperature difference is determined according to the maximum cell temperature and the minimum cell temperature; acquiring the current working state of the battery pack; when the current working state is a discharging state, judging whether the current battery core temperature difference is larger than or equal to a fifth preset temperature value; when the current battery core temperature difference is greater than or equal to a fifth preset temperature value, sending a starting control signal to the water pump to control the water pump to be started; and when the processed battery core temperature difference is smaller than a sixth preset temperature value, sending a closing control signal to the water pump to control the water pump to be closed, wherein the sixth preset temperature value is smaller than a fifth preset temperature value. In this way, when the battery package work in the discharge state, according to the switch of the electric core difference in temperature control water pump that acquires in real time, in order to carry out the equilibrium to the inside difference in temperature of battery package, this embodiment is if the difference in temperature is too big not to open the heater under the discharge state, avoided the battery package discharge temperature too high, make the inside electric core work of battery package under the little and suitable temperature of difference in temperature, the too big problem of the inside difference in temperature of battery package has been solved, the whole package capacity decay rate of battery package has been reduced, improve battery package life, promote the customer and drive and experience.
In addition, an embodiment of the present invention further provides a storage medium, where a battery pack temperature difference control program is stored on the storage medium, and when the battery pack temperature difference control program is executed by a processor, the battery pack temperature difference control method as described above is implemented.
Since the storage medium adopts all technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and no further description is given here.
Referring to fig. 5, fig. 5 is a block diagram illustrating a temperature difference control apparatus for a battery pack according to a first embodiment of the present invention.
As shown in fig. 5, the temperature difference control device for a battery pack according to an embodiment of the present invention includes:
the obtaining module 10 is configured to obtain a maximum cell temperature and a minimum cell temperature inside a battery pack, and determine a cell temperature difference according to the maximum cell temperature and the minimum cell temperature.
The obtaining module 10 is further configured to obtain a current working state of the battery pack.
And the judging module 20 is configured to judge whether the current battery core temperature difference is greater than or equal to a first preset temperature value when the current working state is the slow charging state.
And the control module 30 is configured to send a start control signal to the battery pack heater and the water pump when the current battery core temperature difference is greater than or equal to the first preset temperature value, and control the battery pack heater and the water pump to start so as to reduce the battery core temperature difference of the battery pack.
The control module 30 is further configured to obtain a current water temperature of the water inlet of the battery pack, and send a shutdown control signal to the battery pack heater when the current water temperature reaches a current maximum cell temperature, so as to control the shutdown of the battery pack heater.
The control module 30 is further configured to send a closing control signal to the water pump to control the water pump to be closed when the processed battery core temperature difference is smaller than a second preset temperature value, where the second preset temperature value is smaller than the first preset temperature value.
It should be understood that the above is only an example, and the technical solution of the present invention is not limited in any way, and in a specific application, a person skilled in the art may set the technical solution as needed, and the present invention is not limited thereto.
In the embodiment, the maximum cell temperature and the minimum cell temperature inside the battery pack are obtained, and the cell temperature difference is determined according to the maximum cell temperature and the minimum cell temperature; acquiring the current working state of the battery pack; when the current working state is a slow charging state, judging whether the current battery core temperature difference is larger than or equal to a first preset temperature value; when the current cell temperature difference is greater than or equal to a first preset temperature value, sending a starting control signal to a battery pack heater and a water pump to control the battery pack heater and the water pump to be started so as to reduce the cell temperature difference of the battery pack; the method comprises the steps of obtaining the current water temperature of a water inlet of a battery pack, and sending a closing control signal to a battery pack heater to control the battery pack heater to be closed when the current water temperature reaches the current maximum battery core temperature; and when the processed battery core temperature difference is smaller than a second preset temperature value, sending a closing control signal to the water pump to control the water pump to be closed, wherein the second preset temperature value is smaller than the first preset temperature value. In this way, when the battery package work was in the state of filling slowly, according to the temperature difference of the electric core that acquires in real time and the temperature control heater of water inlet and the switch of water pump to carry out the equilibrium to the inside difference in temperature of battery package, electric core work in making the battery package has solved the too big problem of the inside difference in temperature of battery package under the little and suitable temperature of difference in temperature, has reduced the whole packet capacity decay rate of battery package, improves battery package life, promotes the customer and drives and take experience.
It should be noted that the above-described work flows are only exemplary, and do not limit the scope of the present invention, and in practical applications, a person skilled in the art may select some or all of them to achieve the purpose of the solution of the embodiment according to actual needs, and the present invention is not limited herein.
In addition, the technical details that are not described in detail in this embodiment may be referred to the method for controlling the temperature difference of the battery pack according to any embodiment of the present invention, and are not described herein again.
In an embodiment, the control module 30 is further configured to send an on control signal to the battery pack heater and the water pump when the current working state is the fast charging state, to control the battery pack heater and the water pump to be turned on, and send an off control signal to the battery pack heater to control the battery pack heater to be turned off when the current cell temperature difference is greater than or equal to a third preset temperature value, where the third preset temperature value is greater than the first preset temperature value, and send an off control signal to the water pump to control the water pump to be turned off when the processed cell temperature difference is less than a fourth preset temperature value, where the fourth preset temperature value is greater than the second temperature value.
In one embodiment, the battery pack temperature difference control device further comprises a heating control module;
the heating control module is used for heating the battery pack according to a preset calibration temperature value when the current battery core temperature difference is smaller than a third preset temperature value;
the control module 30 is further configured to send a shutdown control signal to the battery pack heater to control the battery pack heater to be shut down when the current minimum battery core temperature is greater than or equal to the preset calibrated temperature value, and send a shutdown control signal to the water pump to control the water pump to be shut down when the processed battery core temperature difference is less than a fourth preset temperature value.
In an embodiment, the obtaining module is further configured to obtain a current ambient temperature when the current working state is a fast charging state;
the judging module 20 is further configured to judge whether the current ambient temperature is less than a preset ambient low temperature value;
the control module 30 is further configured to send a start control signal to the battery pack heater and the water pump to control the battery pack heater and the water pump to start when the current ambient temperature is less than the preset ambient low temperature value.
In an embodiment, the determining module 20 is further configured to determine whether the current battery cell temperature difference is greater than or equal to a fifth preset temperature value when the current working state is the discharging state;
the control module 30 is further configured to send an opening control signal to the water pump to control the water pump to be opened when the current battery core temperature difference is greater than or equal to the fifth preset temperature value, and send a closing control signal to the water pump to control the water pump to be closed when the processed battery core temperature difference is less than a sixth preset temperature value, where the sixth preset temperature value is less than the fifth preset temperature value.
In an embodiment, the control module 30 is further configured to send an opening control signal to the water pump again to control the water pump to be opened when the currently acquired battery cell temperature difference is greater than or equal to the fifth preset temperature value.
In an embodiment, the determining module 20 is further configured to determine whether the current minimum cell temperature is a first preset module temperature value when the current working state is a discharging state;
the control module 30 is further configured to send an on control signal to the battery pack heater and the water pump when the current minimum electrical core temperature is the first preset module temperature value, control the battery pack heater and the water pump to be turned on, and send an off control signal to the battery pack heater and the water pump to control the battery pack heater and the water pump to be turned off when the processed minimum electrical core temperature is the second preset module temperature value, where the second preset module temperature value is greater than the first preset module temperature value.
Further, it is to be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention or portions thereof that contribute to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (e.g. Read Only Memory (ROM)/RAM, magnetic disk, optical disk), and includes several instructions for enabling a terminal device (e.g. a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (9)

1. A battery pack temperature difference control method is characterized by comprising the following steps:
acquiring the maximum cell temperature and the minimum cell temperature inside a battery pack, and determining a cell temperature difference according to the maximum cell temperature and the minimum cell temperature;
acquiring the current working state of the battery pack;
when the current working state is a slow charging state, judging whether the current battery core temperature difference is greater than or equal to a first preset temperature value;
when the current electric core temperature difference is larger than or equal to the first preset temperature value, sending a starting control signal to a battery pack heater and a water pump to control the battery pack heater and the water pump to be started so as to reduce the electric core temperature difference of the battery pack;
acquiring the current water temperature of a water inlet of the battery pack, and sending a closing control signal to the battery pack heater to control the battery pack heater to be closed when the current water temperature reaches the current maximum battery core temperature;
and when the processed battery core temperature difference is smaller than a second preset temperature value, sending a closing control signal to the water pump to control the water pump to be closed, wherein the second preset temperature value is smaller than the first preset temperature value.
2. The battery pack temperature difference control method according to claim 1, wherein after the obtaining of the current operating state of the battery pack, the method further comprises:
when the current working state is a quick charging state, sending a starting control signal to a battery pack heater and a water pump to control the battery pack heater and the water pump to be started;
when the current cell temperature difference is greater than or equal to a third preset temperature value, sending a closing control signal to the battery pack heater to control the battery pack heater to be closed, wherein the third preset temperature value is greater than the first preset temperature value;
when the processed battery core temperature difference is smaller than a fourth preset temperature value, sending a closing control signal to the water pump to control the water pump to be closed, wherein the fourth preset temperature value is larger than the second preset temperature value;
wherein, when current operating condition is the state of filling soon, send to battery package heater and water pump and open control signal, control battery package heater and the water pump is opened, include:
when the current working state is a quick charging state, acquiring the current environment temperature;
judging whether the current environment temperature is smaller than a preset environment low-temperature value or not;
and when the current environment temperature is lower than the preset environment low-temperature value, sending a starting control signal to the battery pack heater and the water pump to control the battery pack heater and the water pump to be started.
3. The method for controlling temperature difference of a battery pack according to claim 2, wherein when the current operating state is a fast charging state, the method sends a start control signal to the battery pack heater and the water pump to control the battery pack heater and the water pump to start, and then the method further comprises:
when the current battery core temperature difference is smaller than a third preset temperature value, heating the battery pack according to a preset calibration temperature value;
when the current minimum cell temperature is greater than or equal to the preset calibration temperature value, sending a closing control signal to the battery pack heater to control the battery pack heater to be closed;
and when the processed battery core temperature difference is smaller than a fourth preset temperature value, sending a closing control signal to the water pump to control the water pump to be closed.
4. The battery pack temperature difference control method according to claim 1, wherein after the obtaining of the current operating state of the battery pack, the method further comprises:
when the current working state is a discharging state, judging whether the current battery core temperature difference is larger than or equal to a fifth preset temperature value;
when the current battery core temperature difference is greater than or equal to the fifth preset temperature value, sending a starting control signal to a water pump to control the water pump to be started;
and when the processed battery core temperature difference is smaller than a sixth preset temperature value, sending a closing control signal to the water pump to control the water pump to be closed, wherein the sixth preset temperature value is smaller than the fifth preset temperature value.
5. The method for controlling temperature difference of a battery pack according to claim 4, wherein when the processed temperature difference between the battery cells is smaller than a sixth preset temperature value, a shutdown control signal is sent to the water pump, and after the water pump is controlled to be shutdown, the method further includes:
and when the currently acquired battery cell temperature difference is greater than or equal to the fifth preset temperature value, sending a starting control signal to the water pump again to control the water pump to be started.
6. The battery pack temperature difference control method according to any one of claims 1 to 5, wherein after the obtaining of the current operating state of the battery pack, the method further comprises:
when the current working state is a discharging state, judging whether the current minimum cell temperature is a first preset module temperature value or not;
when the current minimum cell temperature is the first preset module temperature value, sending a starting control signal to a battery pack heater and a water pump to control the battery pack heater and the water pump to be started;
when the processed minimum cell temperature is a second preset module temperature value, sending a closing control signal to the battery pack heater and the water pump to control the battery pack heater and the water pump to be closed, wherein the second preset module temperature value is larger than the first preset module temperature value.
7. The utility model provides a battery package temperature difference controlling means which characterized in that, battery package temperature difference controlling means includes:
the battery pack comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring the maximum cell temperature and the minimum cell temperature in the battery pack and determining the cell temperature difference according to the maximum cell temperature and the minimum cell temperature;
the acquisition module is also used for acquiring the current working state of the battery pack;
the judging module is used for judging whether the current battery core temperature difference is larger than or equal to a first preset temperature value or not when the current working state is a slow charging state;
the control module is used for sending a starting control signal to the battery pack heater and the water pump when the current battery core temperature difference is larger than or equal to the first preset temperature value, and controlling the battery pack heater and the water pump to be started so as to reduce the battery core temperature difference of the battery pack;
the control module is further configured to obtain a current water temperature of the water inlet of the battery pack, and send a shutdown control signal to the battery pack heater to control the shutdown of the battery pack heater when the current water temperature reaches a current maximum cell temperature;
the control module is further configured to send a closing control signal to the water pump to control the water pump to be closed when the processed battery core temperature difference is smaller than a second preset temperature value, where the second preset temperature value is smaller than the first preset temperature value.
8. A battery pack temperature differential control apparatus, the apparatus comprising: a memory, a processor, and a battery pack temperature differential control program stored on the memory and executable on the processor, the battery pack temperature differential control program configured to implement the battery pack temperature differential control method according to any one of claims 1 to 6.
9. A storage medium having a battery pack temperature difference control program stored thereon, the battery pack temperature difference control program, when executed by a processor, implementing the battery pack temperature difference control method according to any one of claims 1 to 6.
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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113978311B (en) * 2021-10-15 2024-05-17 潍柴动力股份有限公司 Battery temperature correction method and device and electronic equipment
CN115000582A (en) * 2022-08-04 2022-09-02 中国第一汽车股份有限公司 Heat management device, power battery assembly and control method thereof
CN115020868B (en) * 2022-08-09 2022-11-01 中国第一汽车股份有限公司 Heat management device, power battery assembly and control method thereof
CN116466130B (en) * 2023-03-26 2024-04-30 深圳市开步电子有限公司 Control method for eliminating thermoelectric potential of shunt, electric equipment and energy storage equipment

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108987850A (en) * 2018-08-09 2018-12-11 东风汽车有限公司 Battery temperature control system of electric automobile and control method thereof
CN109305060A (en) * 2018-10-09 2019-02-05 威马智慧出行科技（上海）有限公司 A kind of battery pack heat management system and its control method
CN110509744A (en) * 2019-08-30 2019-11-29 海马新能源汽车有限公司 A kind of thermal management system of electric automobile and electric car
CN112133979A (en) * 2020-09-21 2020-12-25 长城汽车股份有限公司 Power battery temperature control method and device and vehicle
CN112186301A (en) * 2020-09-29 2021-01-05 安徽江淮汽车集团股份有限公司 Temperature control method of liquid-cooled battery pack, electric vehicle and readable storage medium
CN112505547A (en) * 2020-11-10 2021-03-16 东风汽车集团有限公司 Quick charge test method, device and system and computer equipment

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016106567A1 (en) * 2014-12-30 2016-07-07 深圳市大疆创新科技有限公司 Battery preheating method, apparatus and device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108987850A (en) * 2018-08-09 2018-12-11 东风汽车有限公司 Battery temperature control system of electric automobile and control method thereof
CN109305060A (en) * 2018-10-09 2019-02-05 威马智慧出行科技（上海）有限公司 A kind of battery pack heat management system and its control method
CN110509744A (en) * 2019-08-30 2019-11-29 海马新能源汽车有限公司 A kind of thermal management system of electric automobile and electric car
CN112133979A (en) * 2020-09-21 2020-12-25 长城汽车股份有限公司 Power battery temperature control method and device and vehicle
CN112186301A (en) * 2020-09-29 2021-01-05 安徽江淮汽车集团股份有限公司 Temperature control method of liquid-cooled battery pack, electric vehicle and readable storage medium
CN112505547A (en) * 2020-11-10 2021-03-16 东风汽车集团有限公司 Quick charge test method, device and system and computer equipment

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