CN110600831B - Temperature control method and system for battery pack, electronic device and storage medium - Google Patents
Temperature control method and system for battery pack, electronic device and storage medium Download PDFInfo
- Publication number
- CN110600831B CN110600831B CN201910893055.2A CN201910893055A CN110600831B CN 110600831 B CN110600831 B CN 110600831B CN 201910893055 A CN201910893055 A CN 201910893055A CN 110600831 B CN110600831 B CN 110600831B
- Authority
- CN
- China
- Prior art keywords
- battery pack
- temperature
- cooling
- heat exchanger
- heating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 67
- 238000001816 cooling Methods 0.000 claims abstract description 164
- 238000010438 heat treatment Methods 0.000 claims abstract description 119
- 238000004378 air conditioning Methods 0.000 claims description 56
- 239000000110 cooling liquid Substances 0.000 claims description 47
- 239000002826 coolant Substances 0.000 claims description 35
- 238000012545 processing Methods 0.000 claims description 26
- 230000001965 increasing effect Effects 0.000 claims description 13
- 239000003507 refrigerant Substances 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 230000007423 decrease Effects 0.000 claims description 7
- 239000002918 waste heat Substances 0.000 claims description 7
- 230000002528 anti-freeze Effects 0.000 claims description 6
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 12
- 238000004891 communication Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- H01M10/62—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
- H01M10/635—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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- 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)
- Secondary Cells (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention relates to the technical field of power batteries of electric automobiles, and provides a temperature control method and system of a battery pack, electronic equipment and a storage medium. The battery pack is connected to a circulation pipeline, the circulation pipeline comprises a first heat exchanger and a second heat exchanger, the first heat exchanger is further connected to a cooling loop, and the second heat exchanger is further connected to a heating loop. The temperature control method comprises the steps of detecting the temperature of each battery module of the battery pack, and cooling the battery pack by controlling a cooling loop and a circulating pipeline according to a highest temperature, a lowest temperature and a working mode of the battery pack; and the battery pack is heated by controlling the heating loop and the circulating pipeline. The battery pack cooling control system can correspondingly perform cooling control and heating control on the battery pack according to different working modes of the battery pack, control the temperature of the battery pack within a reasonable range, reduce the energy consumption of a vehicle, and ensure driving comfort and stable performance.
Description
Technical Field
The invention relates to the technical field of power batteries of electric automobiles, in particular to a temperature control method and system of a battery pack, electronic equipment and a storage medium.
Background
The power battery system is used as a driving system of the electric automobile and is the key point of research in the development process of the electric automobile. The power battery generally achieves the required voltage and capacity by a plurality of battery modules in a series-parallel connection mode. In the energy conversion process of the power battery for providing driving force for the electric automobile, the conversion efficiency cannot reach 100%, and a considerable part of energy is consumed in the form of heat loss. Especially under the working conditions of quick charge and discharge and high-speed running, a large amount of heat can be generated. Therefore, the battery must be efficiently cooled to control the battery to always operate in a proper temperature range.
In addition, when the battery temperature is low, the operating efficiency of the battery is affected, and therefore, it is also necessary to heat the battery to control the battery temperature within an appropriate range.
In the prior art, the battery is cooled and heated, most of the batteries are only determined according to the collected temperature of the battery pack, the current working mode of the battery pack is influenced, energy consumption loss is caused, and driving comfort and stable performance are also influenced.
It is to be noted that the information applied in the above background section is only for enhancing the understanding of the background of the present invention, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
In view of the above, the present invention provides a method and a system for controlling a temperature of a battery pack, an electronic device, and a storage medium, which can overcome the problems in the prior art that cooling and heating the battery pack may affect the current operating mode of the battery pack, cause energy consumption loss, and affect driving comfort and performance stability.
According to an aspect of the present invention, there is provided a temperature control method of a battery pack connected to a circulation line including a first heat exchanger and a second heat exchanger, the first heat exchanger being further connected to a cooling circuit, the second heat exchanger being further connected to a heating circuit, the temperature control method comprising: detecting the temperature of each battery module of the battery pack, and processing the battery pack according to a highest temperature, a lowest temperature and a working mode of the battery pack, wherein the method comprises the following steps: if the battery pack is in a first charging mode, cooling the battery pack according to the highest temperature and at least one first high-temperature threshold, and heating the battery pack according to the lowest temperature and at least one first low-temperature threshold; if the battery pack is in a second charging mode, and the charging rate of the second charging mode is smaller than that of the first charging mode, cooling the battery pack according to the highest temperature and a second high-temperature threshold, wherein the second high-temperature threshold is larger than the first high-temperature threshold; and heating the battery pack according to the lowest temperature and a second low-temperature threshold.
Preferably, in the above temperature control method, the step of cooling the battery pack according to the maximum temperature and at least one first high temperature threshold includes: when the maximum temperature is higher than the first high temperature threshold, sending a cooling control signal carrying first cooling power to the cooling loop; and increasing the first cooling power as the maximum temperature increases in degrees beyond the first high temperature threshold; decreasing the first cooling power as the maximum temperature decreases by a degree that exceeds the first high temperature threshold.
Preferably, in the above temperature control method, the step of cooling the battery pack according to the maximum temperature and a second high temperature threshold includes: and when the highest temperature is higher than the second high temperature threshold, sending a cooling control signal carrying second cooling power to the cooling loop, wherein the second cooling power is smaller than the first cooling power.
Preferably, in the above temperature control method, the step of processing the battery pack further includes: if the battery pack is in a driving mode, cooling the battery pack according to the highest temperature and the second high-temperature threshold; and when the current vehicle speed in the driving mode exceeds a preset vehicle speed, increasing the second cooling power according to the difference value that the current vehicle speed exceeds the preset vehicle speed.
Preferably, in the temperature control method, the cooling circuit includes the first heat exchanger, a compressor, a condenser and an electronic expansion valve, which are connected in sequence, and the step of cooling the battery pack includes: controlling cooling liquid to cool the battery pack through the circulating pipeline; and controlling the refrigerant in the cooling loop to sequentially pass through the compressor for compression, the condenser for liquefaction and the electronic expansion valve for pressure reduction until the temperature is lower than the cooling liquid according to the set cooling power, and performing heat exchange with the cooling liquid through the first heat exchanger to cool the cooling liquid.
Preferably, in the temperature control method, the step of performing heat treatment on the battery pack according to the minimum temperature and at least one first low temperature threshold includes: when the lowest temperature is lower than the first low-temperature threshold, sending a heating control signal carrying first heating power to the heating loop; and when the temperature of the cooling liquid at the inlet of the circulating pipeline reaches a preset temperature, and the lowest temperature and the highest temperature meet a set condition, adjusting the first heating power according to the ambient temperature value outside the vehicle.
Preferably, in the temperature control method, the step of performing heat treatment on the battery pack according to the minimum temperature and a second low temperature threshold includes: and when the lowest temperature is lower than the second low-temperature threshold, sending a heating control signal carrying second heating power to the heating loop, wherein the second heating power is smaller than the first heating power.
Preferably, in the temperature control method, the heating circuit includes the second heat exchanger, a warm air water pump, and a heater, which are connected in sequence, and the step of heating the battery pack includes: controlling cooling liquid to heat the battery pack through the circulating pipeline; and controlling the antifreeze in the heating loop to be heated to a temperature higher than the coolant through the driving of the warm air water pump and the heater in sequence according to the set heating power, and performing heat exchange with the coolant through the second heat exchanger to heat the coolant.
Preferably, the temperature control method further includes an air conditioning branch, the air conditioning branch is connected across two ends of the first heat exchanger of the cooling circuit through a throttle valve, so that residual cold generated by air conditioning exchanges heat with the cooling liquid in the circulation pipeline through the first heat exchanger; and the air conditioning branch is bridged at two ends of the second heat exchanger of the heating loop through a three-way valve so as to exchange heat between the waste heat generated by air conditioning and the cooling liquid in the circulating pipeline through the second heat exchanger.
Preferably, in the above temperature control method, the step of exchanging heat between the residual heat generated by air conditioning and the coolant in the circulation line through the first heat exchanger includes: when the temperature of the working medium in the air conditioning branch is lower than the temperature of the cooling liquid in the first heat exchanger, the throttle valve is opened, so that the working medium in the air conditioning branch exchanges heat with the cooling liquid in the first heat exchanger; and the step of exchanging heat of the residual heat generated by air conditioning with the cooling liquid in the circulating pipeline through the second heat exchanger comprises the following steps: when the temperature of the working medium in the air conditioning branch is higher than that of the cooling liquid in the second heat exchanger, the air conditioning branch is communicated with the second heat exchanger through the three-way valve, and the working medium in the air conditioning branch exchanges heat with the cooling liquid in the second heat exchanger.
Preferably, in the temperature control method, the battery pack includes a plurality of battery modules, each battery module includes a plurality of battery cells, and at least one maximum temperature detection point and one minimum temperature detection point are set in each battery module.
According to another aspect of the present invention, there is provided a temperature control system for a battery pack connected to a circulation line including a first heat exchanger and a second heat exchanger, the first heat exchanger further connected to a cooling circuit, the second heat exchanger further connected to a heating circuit, the temperature control system comprising: the detection module is used for detecting the temperature of each battery module of the battery pack; the judging module is used for judging and processing the battery pack according to a highest temperature, a lowest temperature and the working mode of the battery pack; the execution module is used for cooling the battery pack according to the highest temperature and at least one first high-temperature threshold value and heating the battery pack according to the lowest temperature and at least one first low-temperature threshold value when the battery pack is in a first charging mode; when the battery pack is in a second charging mode, the charging rate of the second charging mode is smaller than that of the first charging mode, and the battery pack is cooled according to the highest temperature and a second high-temperature threshold, wherein the second high-temperature threshold is larger than the first high-temperature threshold; and heating the battery pack according to the lowest temperature and a second low-temperature threshold.
According to another aspect of the present invention, there is provided an electronic apparatus comprising: a processor; a memory having stored therein executable instructions of the processor; wherein the processor is configured to perform the steps of the above-described temperature control method of the battery pack via execution of the executable instructions.
According to another aspect of the present invention, there is provided a computer-readable storage medium storing a program which, when executed, implements the steps of the temperature control method of a battery pack described above.
Compared with the prior art, the invention has the beneficial effects that:
the battery pack circulation pipeline is communicated with the cooling loop and the heating loop respectively through the two heat exchangers, so that the battery pack can be cooled through the cooling loop and the circulation pipeline, and the battery pack can be heated through the heating loop and the circulation pipeline;
according to the invention, the processing mode of the battery pack is determined according to the highest temperature, the lowest temperature and the working mode of the battery pack, so that the cooling/heating processing of the battery pack is adapted to the current working mode of the battery pack, the temperature of the battery pack is controlled within a reasonable range, the energy consumption of a vehicle is reduced, and the driving comfort and the stable performance are ensured.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic view illustrating a temperature control method of a battery pack according to an embodiment of the present invention;
fig. 2 is a schematic diagram showing steps of a temperature control method of a battery pack according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a control process of the battery pack in the first charging mode according to the embodiment of the invention;
fig. 4 is a schematic diagram illustrating a control process of the battery pack in the second charging mode according to the embodiment of the invention;
fig. 5 shows a block schematic diagram of a temperature control system of a battery pack in an embodiment of the invention;
FIG. 6 is a schematic diagram showing a structure of an electronic apparatus according to an embodiment of the present invention;
fig. 7 shows a schematic structural diagram of a computer-readable storage medium in an embodiment of the invention.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.
Fig. 1 illustrates the temperature control principle of the battery pack in the embodiment, and referring to fig. 1, the battery pack 11 is connected to a circulation pipeline 1, the circulation pipeline 1 comprises a first heat exchanger 12 and a second heat exchanger 13, the first heat exchanger 12 is further connected to a cooling loop 2, and the second heat exchanger 13 is further connected to a heating loop 3. A coolant for cooling and heating the battery pack 11 flows through the circulation line 1. A refrigerant for cooling the coolant in the first heat exchanger 12 flows through the cooling circuit 2, and when the coolant in the first heat exchanger 12 is cooled, the cooled coolant can cool the battery pack 11 through the circulation line 1. Antifreeze solution for heating the coolant in the second heat exchanger 13 flows through the heating circuit 3, and when the coolant in the second heat exchanger 13 is heated, the heated coolant can heat the battery pack 11 through the circulation line 1.
In one embodiment, the circulation pipeline 1 comprises a battery pack 11, a second heat exchanger 13, a first heat exchanger 12 and a battery water pump 14 which are connected in sequence. The Battery pack 11 includes not only the Battery module, but also a part of a Battery Management module (BMS), a cooling plate for cooling the Battery module, and the like, and the cooling liquid flows through the cooling plate to exchange heat with the Battery module under a control signal of the BMS, thereby cooling or heating the Battery module. The present invention focuses on the temperature control principle and method of the battery, and thus the structural configurations of the battery module, the cooling plate, and the BMS will not be explained in detail. In the process of cooling and heating the battery pack 11, the battery water pump 14 provides flowing power of the cooling liquid, and the cooling liquid is driven to flow through the battery pack 11, the second heat exchanger 13 and the first heat exchanger 12 in sequence in the counterclockwise direction in the illustrated circulation pipeline 1 to circulate. The circulation circuit 1 may also include a first expansion pot 15 for buffering and relieving pressure to avoid over-pressure in the circuit or over-cooling fluid to burst the circuit.
In one embodiment, the cooling circuit 2 includes a first heat exchanger 12, a compressor 21, a condenser 22, and an electronic expansion valve 23 for adjusting the flow rate of the refrigerant, which are connected in series. In the process that the cooling circuit 2 cools the cooling liquid in the first heat exchanger 12, the refrigerant is in the counterclockwise direction in the illustrated cooling circuit 2, the compressor 21 compresses the low-pressure gaseous refrigerant to the high-pressure gaseous refrigerant, the high-pressure gaseous refrigerant is liquefied into the high-pressure liquid state in the condenser 22, the high-pressure liquid refrigerant is depressurized into the low-pressure liquid state after flowing through the electronic expansion valve 23, and the low-pressure low-temperature liquid refrigerant flows through the first heat exchanger 12, takes away heat of the cooling liquid in the first heat exchanger 12, and circulates in a reciprocating manner.
In one embodiment, the heating circuit 3 includes a second heat exchanger 13, a warm air pump 31, and a heater 32 connected in sequence, wherein the heater 32 may be a PTC (temperature sensitive) heater. During the heating of the coolant in the second heat exchanger 13 by the heating circuit 3, the antifreeze solution is heated by the heater 32 in the counterclockwise direction in the illustrated heating circuit 3, then flows through the second heat exchanger 13 under the driving of the warm air water pump 31, provides heat for the coolant in the second heat exchanger 13, and is circulated in a reciprocating manner. The heating circuit 3 may also comprise a second expansion pot 33 for buffering and relieving pressure to avoid pipe explosion due to excessive pressure in the pipeline or excessive antifreeze.
In one embodiment, a HVAC (Heating, Ventilation and Air Conditioning) Air Conditioning branch 4 is also included, which is connected across the cooling circuit 2 and the first heat exchanger 12 via a throttle valve 41 and across the Heating circuit 3 and the second heat exchanger 13 via a three-way valve 42. The HVAC air-conditioning branch 4 may exchange heat of the residual cool generated by air conditioning with the coolant in the circulation line 1 through the first heat exchanger 12 to cool the coolant in the circulation line 1; and exchanging heat of the surplus heat generated by air conditioning with the coolant in the circulation line 1 through the second heat exchanger 13 to heat the coolant in the circulation line 1. In particular, the HVAC air conditioning branch 4 acts on the air conditioning system of the vehicle for air conditioning the passenger compartment of the vehicle. The working medium in the HVAC air conditioning branch 4 will produce a part of excess cold (waste heat) or a part of excess heat (waste heat) due to air conditioning. Cooling the coolant in the circulation line 1 can be achieved by exchanging heat with the coolant in the first heat exchanger 12 using the residual heat in the HVAC air-conditioning branch 4; heating the coolant in the circulation line 1 can be achieved by exchanging heat with the coolant in the second heat exchanger 13 by using the residual heat in the HVAC air-conditioning branch 4.
In one embodiment, the step of exchanging heat of the residual cool generated by the air conditioning with the cooling liquid in the circulation line 1 through the first heat exchanger 12 includes: when the temperature of the working medium in the air conditioning branch 4 is lower than the temperature of the cooling liquid in the first heat exchanger 12, the throttle valve 41 is opened, so that the working medium in the air conditioning branch 4 exchanges heat with the cooling liquid in the first heat exchanger 12. The step of exchanging heat of the waste heat generated by air conditioning with the cooling liquid in the circulation line 1 through the second heat exchanger 13 includes: when the temperature of the working medium in the air conditioning branch 4 is higher than the temperature of the cooling liquid in the second heat exchanger 13, the air conditioning branch 4 is communicated with the second heat exchanger 13 through the three-way valve 42, so that the working medium in the air conditioning branch 4 exchanges heat with the cooling liquid in the second heat exchanger 13. The temperature of the working medium in the air conditioning branch 4 and the temperature of the cooling liquid in the circulation line 1 can be obtained by a plurality of temperature detection devices arranged in the air conditioning branch 4 and the circulation line 1, respectively.
In some embodiments, when the residual cool in the air-conditioning branch 4 is used for heat exchange with the circulation line 1, the cooling power for heat exchange with the coolant in the first heat exchanger 12 is brought to a desired cooling power by coordinately controlling the opening degree of the throttle valve 41 and the opening degree of the electronic expansion valve 23, so as to achieve effective cooling of the battery pack 11 without affecting the air-conditioning of the passenger compartment. In some embodiments, when the waste heat in the air conditioning branch 4 is used for heat exchange with the circulation line 1, the frequency of the three-way valve 42 for communication between the air conditioning branch 4 and the heating circuit 3 is coordinated to control the heating power for heat exchange with the coolant in the second heat exchanger 13 to reach the desired heating power, so as to achieve effective heating of the battery pack 11 without affecting the air conditioning of the passenger compartment.
Fig. 2 illustrates the main steps of the temperature control method of the battery pack in the embodiment, and referring to fig. 2, the temperature control method of the battery pack in the embodiment mainly includes:
and step S10, detecting the temperature of each battery module of the battery pack, and processing the battery pack according to a highest temperature, a lowest temperature and the working mode of the battery pack. The working modes of the battery pack comprise a first charging mode, a second charging mode and a driving mode. The method determines what kind of treatment is carried out on the battery pack according to the highest temperature, the lowest temperature and the working mode, so that the temperature control strategy of the battery pack is adaptive to the current working mode of the battery pack, the temperature of the battery pack is controlled within a reasonable range, the energy consumption of a vehicle is reduced, and the driving comfort and the stable performance are ensured.
In one embodiment, the battery pack comprises a plurality of battery modules, each battery module comprises a plurality of battery cells, and at least one maximum temperature detection point and one minimum temperature detection point are arranged in each battery module. Wherein the maximum and minimum temperatures of the battery pack may be detected, judged and outputted through the battery management module BMS.
Step S20, if the battery pack is in the first charging mode, determining whether to cool the battery pack according to the relationship between the highest temperature and the at least one first high temperature threshold, and determining whether to heat the battery pack according to the relationship between the lowest temperature and the at least one first low temperature threshold. Step S30, if the battery pack is in a second charging mode, judging whether to cool the battery pack according to the relationship between the highest temperature and a second high-temperature threshold, wherein the second high-temperature threshold is larger than the first high-temperature threshold; and judging whether to heat the battery pack according to the relation between the lowest temperature and a second low-temperature threshold.
The first charging mode is a fast charging mode, the second charging mode is a slow charging mode, and the charging multiplying power of the battery pack in the first charging mode is far larger than that of the battery pack in the second charging mode. During quick charge, the calorific capacity and the heat production rate of the battery pack are far greater than the calorific capacity and the heat production rate of the battery pack during slow charge, and the control of the charging duration is more important for a user during quick charge, so that a first high-temperature threshold value for judging that the battery pack enters cooling treatment during control and quick charge is smaller than a second high-temperature threshold value for judging that the battery pack enters cooling treatment during slow charge, the temperature of the battery pack is timely adjusted to a proper value in a first charging mode, and the quick charge speed is improved.
In one embodiment, referring to fig. 3, the determining whether to cool the battery pack according to the relationship between the maximum temperature and the at least one first high temperature threshold in step S20 includes: s201, judging whether the highest temperature is higher than a first high-temperature threshold value, and S202, if so, sending a cooling control signal carrying first cooling power to a cooling loop; s203, increasing the first cooling power along with the increase of the degree of the highest temperature exceeding the first high-temperature threshold; the first cooling power is reduced as the degree to which the maximum temperature exceeds the first high temperature threshold decreases.
As shown in fig. 1, the method of cooling the battery pack 11 includes: the control cooling liquid cools the battery pack 11 via the circulation line 1 and controls the cooling circuit 2 to cool the cooling liquid in the first heat exchanger 12 according to the first cooling power. Specifically, the refrigerant in the cooling circuit 2 is controlled according to the first cooling power to be compressed by the compressor 21, liquefied by the condenser 22, and depressurized by the electronic expansion valve 23 to a temperature lower than the coolant, and exchanges heat with the coolant through the first heat exchanger 12 to cool the coolant in the first heat exchanger 12. When residual cool in the air-conditioning branch 4 and heat exchange with the circulation line 1 by the cooling circuit 2 are simultaneously used, the cooling power for heat exchange with the coolant in the first heat exchanger 12 is brought to the first cooling power by coordinately controlling the opening degree of the throttle valve 41 and the opening degree of the electronic expansion valve 23, so as to achieve effective cooling of the battery pack 11. When the first cooling capacity can be achieved by using the residual cooling in the air-conditioning branch 4 alone, the electronic expansion valve 23 may be closed to communicate the air-conditioning branch 4 with the first heat exchanger 12 alone.
The first cooling power may be sized to vary in proportion to the degree to which the maximum temperature exceeds the first high temperature threshold, or may be set to multiple steps in relation to the degree to which the maximum temperature exceeds the first high temperature threshold. For example, in a specific embodiment, when it is detected that the battery pack enters the fast charging mode, the BMS determines the highest temperature of the battery pack, and when the highest temperature is greater than or equal to 37 ℃ (the first high temperature threshold), the BMS sends a first cooling power request 1500W, and the vehicle controller controls the rotation speed of the compressor and the opening degree of the electronic expansion valve in the cooling circuit, so that the cooling circuit outputs corresponding cooling power to achieve the cooling effect of the battery pack. When the highest temperature is more than or equal to 41 ℃, the BMS sends a second-gear cooling power request of 2500W; and when the maximum temperature is more than or equal to 44 ℃, the BMS sends a three-gear cooling power request of 4000W. In the cooling process, when the heat productivity of the battery pack is lower than the cooling power, the maximum temperature is gradually reduced, so that the relationship between the maximum temperature and the first high-temperature threshold is monitored in real time, and after each cooling power request is executed, the maximum temperature and the first high-temperature threshold can be determined again, and the processing measures of the battery pack are determined according to the determination: continuing cooling, reducing power cooling or exiting cooling. In a word, the strategy that the first cooling power is increased along with the increase of the maximum temperature exceeding the degree of the first high-temperature threshold and the first cooling power is reduced along with the decrease of the maximum temperature exceeding the degree of the first high-temperature threshold is followed, so that the temperature of the battery pack can be timely and quickly adjusted when the battery pack is in the quick charging mode, the temperature of the battery pack is controlled in a proper range, the energy consumption is saved, and the stable performance of the vehicle is ensured.
Further, referring to fig. 4, the step S30 of determining whether to perform the cooling process on the battery pack according to the relationship between the maximum temperature and a second high temperature threshold includes: s301, judging whether the highest temperature is higher than a second high-temperature threshold value, and S302, if so, sending a cooling control signal carrying second cooling power to the cooling loop, wherein the second cooling power is smaller than the first cooling power. The method for cooling the battery pack includes the steps of controlling the circulation pipeline to cool the battery pack, and cooling the cooling liquid in the circulation pipeline by the cooling loop to cool the battery pack. The calorific capacity and the heat production rate of battery package are all less when filling slowly, and consequently the battery package gets into the high temperature threshold value of cooling process when filling slowly and is greater than the operating mode when filling soon, and the cooling power of battery package is less than the operating mode when filling slowly to realize can guaranteeing to fill slowly the temperature control of battery package in safe temperature range, can reduce the energy consumption to minimum again.
For example, in one specific embodiment, the second high temperature threshold is set at 40 ℃ and the second cooling power is set at 600W. Of course, the specific values of the second high temperature threshold, the second cooling power, and the first high temperature threshold and the first cooling power in the above embodiments may be adjusted accordingly according to different module and system performance requirements.
In an embodiment, as shown in step S303, a cooling control manner, such as a multi-step control manner, may also be adopted to increase the second cooling power as the degree of the highest temperature exceeding the second high temperature threshold increases, and decrease the second cooling power as the degree of the highest temperature exceeding the second high temperature threshold decreases, so as to refer to the above-mentioned embodiments, and a description thereof is not repeated here.
Further, the step of processing the battery pack further comprises: if the battery pack is in the driving mode, judging whether to cool the battery pack according to the relation between the highest temperature and a second high-temperature threshold; and when the current vehicle speed in the driving mode exceeds a preset vehicle speed, increasing the second cooling power according to the difference value that the current vehicle speed exceeds the preset vehicle speed. In the driving process, under the safety premise of ensuring the battery pack, a user pays more attention to the comfort of the passenger compartment and is more sensitive to the requirement of an air conditioner in the vehicle. Therefore, the cooling strategy in the driving mode is consistent with the cooling strategy in the slow charging mode, the judgment condition for the battery pack to enter the cooling treatment in the driving process is that the highest temperature is more than or equal to 40 ℃, and the first-gear cooling power request value is 600W, so that the reasonable use environment of the battery pack can be ensured, and the comfort in the driving process can be preferentially ensured. In the driving process, the discharge multiplying power of the battery pack is small at low and medium speed, the heating quantity and the heat production rate are small, and the battery pack can be correspondingly increased at high speed. Therefore, a preset vehicle speed can be set, when the current vehicle speed in the driving mode exceeds the preset vehicle speed, the second cooling power is increased according to the difference value that the current vehicle speed exceeds the preset vehicle speed, so that the change that the discharge rate, the heat productivity and the heat production rate of the battery pack are increased during high-speed driving is adapted, the current working mode of the battery pack is adapted, and the temperature of the battery pack is controlled within a reasonable range.
The low-temperature traveling crane is allowed to discharge under the influence of the characteristics of the battery cell monomer, but the low-temperature charging performance is limited. Therefore, the battery pack has no preheating process in the driving mode, and the battery pack needs to be preheated firstly when the battery pack is charged at low temperature. In one embodiment, referring to fig. 3, the step of determining whether to heat-treat the battery pack according to the relationship between the lowest temperature and the at least one first low temperature threshold in step S20 includes: s204, judging whether the lowest temperature is lower than a first low-temperature threshold value or not, and S205, if so, sending a heating control signal carrying first heating power to the heating loop; and S206, when the temperature of the cooling liquid at the inlet of the circulating pipeline reaches a preset temperature, and the lowest temperature and the highest temperature meet a set condition, adjusting the first heating power according to the external environment temperature value.
As shown in fig. 1, the heat treatment method for the battery pack 11 is: the cooling liquid is controlled to heat the battery pack 11 through the circulating pipeline 1, and the heating loop 3 is controlled to heat the cooling liquid in the second heat exchanger 13 according to the first heating power. Specifically, the antifreeze in the heating circuit 3 is controlled according to the first heating power to be heated to a temperature higher than the coolant by the driving of the warm air water pump 31 and the heater 32 in sequence, and heat-exchanged with the coolant through the second heat exchanger 13 to heat the coolant in the second heat exchanger 13. When the waste heat in the air conditioning branch 4 and the heat exchange between the heating loop 3 and the circulation pipeline 1 are simultaneously utilized, the frequency of the three-way valve 42 for coordinated control of the communication between the air conditioning branch 4 and the heating loop 3 is enabled to reach the first heating power, so that the effective heating of the battery pack 11 is realized. When the first heating power can be achieved by using the residual heat in the air conditioning branch 4 alone, the air conditioning branch 4 can be communicated with the second heat exchanger 13 through the three-way valve 42 alone.
In a specific embodiment, after the battery pack enters the quick charging mode, the minimum temperature is judged, when the minimum temperature is less than 5 ℃, the BMS sends a heating power request of 5KW, and the vehicle controller controls the PTC heater to output corresponding heating power, so as to achieve the heating effect of the battery pack. Along with the heating process, the cooling liquid in the circulating pipeline is gradually heated, when the inlet temperature of the cooling plate is more than or equal to 50 ℃, and at the moment, if the lowest temperature of the battery pack is less than 3 ℃ and the highest temperature of the battery pack is less than 15 ℃, the first heating power is adjusted according to the ambient temperature outside the vehicle, so that the heating efficiency and the energy conservation are both considered. Wherein, the temperature value at the inlet of the cooling plate and the ambient temperature value outside the vehicle are respectively measured by a sensor of the vehicle. The first heating power is adjusted according to the ambient temperature value outside the vehicle, for example: the on-vehicle external environment temperature value is reduced to reduce the first heating power, and the on-vehicle external environment temperature value is increased to increase the first heating power, so that the heating efficiency and energy conservation are both considered under the working conditions that the inlet temperature of the cooling plate is more than or equal to 50 ℃, and the lowest temperature of the battery pack is less than 3 ℃ and the highest temperature of the battery pack is less than 15 ℃.
In one embodiment, referring to fig. 4, the determining whether to heat the battery pack according to the relationship between the lowest temperature and a second low temperature threshold in step S30 includes: s304, judging whether the lowest temperature is lower than a second low-temperature threshold value, and S305, if so, sending a heating control signal carrying second heating power to the heating loop, wherein the second heating power is smaller than the first heating power. The mode of carrying out heat treatment to the battery package wherein is: and controlling the cooling liquid to pass through the circulating pipeline heating battery pack, and controlling the heating loop to heat the cooling liquid in the circulating pipeline according to the second heating power. The second heating power is controlled to be smaller than the first heating power, so that the battery pack is rapidly heated when being rapidly charged, and the energy consumption is saved when being slowly charged.
In one embodiment, the minimum temperature is determined after the battery pack enters the slow charge mode, and the BMS issues a heating power request of 3KW to heat the coolant when the minimum temperature is < 5 ℃. Further, S306, when the lowest temperature is higher than a temperature threshold, for example, when the lowest temperature is greater than or equal to 7 ℃, the heating is removed.
According to the temperature control method of the battery pack, the circulation pipeline of the battery pack is respectively communicated with the cooling loop and the heating loop through the two heat exchangers, so that the battery pack can be cooled through the cooling loop and the circulation pipeline, and the battery pack is heated through the heating loop and the circulation pipeline; the battery pack is determined to be processed according to the highest temperature, the lowest temperature and the working mode of the battery pack, so that the cooling/heating processing of the battery pack is adaptive to the current working mode of the battery pack, the temperature of the battery pack is controlled within a reasonable range, the energy consumption of a vehicle is reduced, and the driving comfort and the stable performance are ensured.
The embodiment of the invention also provides a temperature control system of the battery pack, which can be a module of the BMS, and the BMS can dynamically monitor and control the voltage, the current, the energy balance, the charge state, the working state and the like of the battery besides temperature control. The battery pack is connected to a circulation pipeline, the circulation pipeline comprises a first heat exchanger and a second heat exchanger, the first heat exchanger is further connected to a cooling loop, and the second heat exchanger is further connected to a heating loop. Temperature control system the temperature control system 5 of the battery pack in the present embodiment, shown with reference to fig. 5, is configured to perform the temperature control method described in any of the above embodiments, and includes:
a detection module 510 for detecting the temperature of each battery module of the battery pack; a determining module 520, configured to determine to process the battery pack according to a highest temperature, a lowest temperature, and a working mode of the battery pack. The detecting module 510 and the determining module 520 are configured to execute step S10 of the temperature control method described in any of the above embodiments.
An executing module 530, configured to determine whether to perform cooling processing on the battery pack according to a relationship between the highest temperature and at least one first high temperature threshold when the battery pack is in a first charging mode, and determine whether to perform heating processing on the battery pack according to a relationship between the lowest temperature and at least one first low temperature threshold; when the battery pack is in a second charging mode, the charging rate of the second charging mode is smaller than that of the first charging mode, whether cooling processing is carried out on the battery pack is judged according to the relation between the highest temperature and a second high-temperature threshold, and the second high-temperature threshold is larger than the first high-temperature threshold; and judging whether to heat the battery pack according to the relation between the lowest temperature and a second low-temperature threshold. The execution module 530 may execute the steps S20 and S30 of the temperature control method described in any of the above embodiments.
The temperature control system of the battery pack can realize the communication between the circulating pipeline of the battery pack and the cooling loop and the communication between the circulating pipeline of the battery pack and the heating loop through the two heat exchangers, so that the battery pack can be cooled through the cooling loop and the circulating pipeline, and the battery pack can be heated through the heating loop and the circulating pipeline; and the battery pack is determined to be processed according to the highest temperature, the lowest temperature and the working mode of the battery pack, so that the cooling/heating processing of the battery pack is adapted to the current working mode of the battery pack, the temperature of the battery pack is controlled within a reasonable range, the energy consumption of a vehicle is reduced, and the driving comfort and the stable performance are ensured.
An embodiment of the present invention further provides an electronic device, which includes a processor and a memory, where the memory stores executable instructions, and the processor is configured to execute the steps of the temperature control method for a battery pack in the foregoing embodiments by executing the executable instructions.
As described above, the electronic device of the present invention can realize the communication between the circulation pipeline of the battery pack and the cooling circuit and the communication between the circulation pipeline of the battery pack and the heating circuit through the two heat exchangers, so that the battery pack can be cooled through the cooling circuit and the circulation pipeline, and the battery pack can be heated through the heating circuit and the circulation pipeline; and the battery pack is determined to be processed according to the highest temperature, the lowest temperature and the working mode of the battery pack, so that the cooling/heating processing of the battery pack is adapted to the current working mode of the battery pack, the temperature of the battery pack is controlled within a reasonable range, the energy consumption of a vehicle is reduced, and the driving comfort and the stable performance are ensured.
Fig. 6 is a schematic structural diagram of an electronic device in an embodiment of the present invention, and it should be understood that fig. 6 only schematically illustrates various modules, and these modules may be virtual software modules or actual hardware modules, and the combination, the splitting, and the addition of the remaining modules of these modules are within the scope of the present invention.
As will be appreciated by one skilled in the art, aspects of the present invention may be embodied as a system, method or program product. Thus, various aspects of the invention may be embodied in the form of: an entirely hardware embodiment, an entirely software embodiment (including firmware, microcode, etc.) or an embodiment combining hardware and software aspects that may all generally be referred to herein as a "circuit," module "or" platform.
The electronic device 600 of the present invention is described below with reference to fig. 6. The electronic device 600 shown in fig. 6 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present invention.
As shown in fig. 6, the electronic device 600 is embodied in the form of a general purpose computing device. The components of the electronic device 600 may include, but are not limited to: at least one processing unit 610, at least one memory unit 620, a bus 630 connecting the different platform components (including the memory unit 620 and the processing unit 610), a display unit 640, etc.
Wherein the storage unit stores program code that can be executed by the processing unit 610, so that the processing unit 610 performs the steps of the temperature control method of the battery pack described in the above-described embodiments. For example, the processing unit 610 may perform the steps as shown in fig. 2 to 4.
The storage unit 620 may include readable media in the form of volatile memory units, such as a random access memory unit (RAM)6201 and/or a cache memory unit 6202, and may further include a read-only memory unit (ROM) 6203.
The memory unit 620 may also include a program/utility 6204 having a set (at least one) of program modules 6205, such program modules 6205 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may comprise an implementation of a network environment.
The electronic device 600 may also communicate with one or more external devices 700 (e.g., keyboard, pointing device, bluetooth device, etc.), with one or more devices that enable a user to interact with the electronic device 600, and/or with any devices (e.g., router, modem, etc.) that enable the electronic device 600 to communicate with one or more other computing devices. Such communication may occur via an input/output (I/O) interface 650. Also, the electronic device 600 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network such as the Internet) via the network adapter 660. The network adapter 660 may communicate with other modules of the electronic device 600 via the bus 630. It should be appreciated that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the electronic device 600, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage platforms, to name a few.
An embodiment of the present invention further provides a computer-readable storage medium for storing a program, and the program, when executed, implements the steps of the temperature control method for a battery pack described in the above embodiment. In some possible embodiments, the various aspects of the invention may also be implemented in the form of a program product comprising program code for causing a terminal device to perform the steps of the method for temperature control of a battery pack described in the above embodiments, when the program product is run on the terminal device.
As described above, the computer-readable storage medium of the present invention can achieve communication of the circulation line of the battery pack with the cooling circuit and communication with the heating circuit through the two heat exchangers, respectively, so that the battery pack can be cooled through the cooling circuit and the circulation line, and heated through the heating circuit and the circulation line; and the battery pack is determined to be processed according to the highest temperature, the lowest temperature and the working mode of the battery pack, so that the cooling/heating processing of the battery pack is adapted to the current working mode of the battery pack, the temperature of the battery pack is controlled within a reasonable range, the energy consumption of a vehicle is reduced, and the driving comfort and the stable performance are ensured.
Fig. 7 is a schematic structural diagram of a computer-readable storage medium of the present invention. Referring to fig. 7, a program product 800 for implementing the above method according to an embodiment of the present invention is described, which may employ a portable compact disc read only memory (CD-ROM) and include program code, and may be run on a terminal device, such as a personal computer. However, the program product of the present invention is not limited in this regard and, in the present document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
A computer readable storage medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable storage medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a readable storage medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., through the internet using an internet service provider).
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (11)
1. A method for controlling the temperature of a battery pack, wherein the battery pack is connected to a circulation circuit, the circulation circuit including a first heat exchanger and a second heat exchanger, the first heat exchanger further connected to a cooling circuit, the second heat exchanger further connected to a heating circuit, the method comprising:
detecting the temperature of each battery module of the battery pack, and processing the battery pack according to a highest temperature, a lowest temperature and a working mode of the battery pack, wherein the method comprises the following steps:
if the battery pack is in a first charging mode, cooling the battery pack according to the highest temperature and at least one first high-temperature threshold, and heating the battery pack according to the lowest temperature and at least one first low-temperature threshold;
if the battery pack is in a second charging mode, and the charging rate of the second charging mode is smaller than that of the first charging mode, cooling the battery pack according to the highest temperature and a second high-temperature threshold, wherein the second high-temperature threshold is larger than the first high-temperature threshold; heating the battery pack according to the lowest temperature and a second low-temperature threshold;
the step of cooling the battery pack according to the maximum temperature and at least one first high temperature threshold comprises:
when the maximum temperature is higher than the first high temperature threshold, sending a cooling control signal carrying first cooling power to the cooling loop; and
increasing the first cooling power as the maximum temperature increases in degrees beyond the first high temperature threshold; decreasing the first cooling power as the maximum temperature decreases in degrees beyond the first high temperature threshold;
the step of cooling the battery pack according to the maximum temperature and a second high temperature threshold comprises:
when the maximum temperature is higher than the second high temperature threshold, sending a cooling control signal carrying second cooling power to the cooling loop, wherein the second cooling power is smaller than the first cooling power;
the step of processing the battery pack further comprises:
if the battery pack is in a driving mode, cooling the battery pack according to the highest temperature and the second high-temperature threshold; and
and when the current vehicle speed in the driving mode exceeds a preset vehicle speed, increasing the second cooling power according to the difference value that the current vehicle speed exceeds the preset vehicle speed.
2. The temperature control method according to claim 1, wherein the cooling circuit comprises the first heat exchanger, a compressor, a condenser and an electronic expansion valve connected in series, and the step of cooling the battery pack comprises:
controlling cooling liquid to cool the battery pack through the circulating pipeline; and
and controlling the refrigerant in the cooling loop to sequentially pass through the compressor for compression, the condenser for liquefaction and the electronic expansion valve for pressure reduction until the temperature is lower than the cooling liquid according to the set cooling power, and performing heat exchange with the cooling liquid through the first heat exchanger to cool the cooling liquid.
3. The method of claim 1, wherein the step of heat treating the battery pack according to the minimum temperature and at least a first low temperature threshold comprises:
when the lowest temperature is lower than the first low-temperature threshold, sending a heating control signal carrying first heating power to the heating loop; and
and when the temperature of the cooling liquid at the inlet of the circulating pipeline reaches a preset temperature, and the lowest temperature and the highest temperature meet a set condition, adjusting the first heating power according to the external environment temperature value.
4. The method of claim 3, wherein the step of heat treating the battery pack according to the minimum temperature and a second low temperature threshold comprises:
and when the lowest temperature is lower than the second low-temperature threshold, sending a heating control signal carrying second heating power to the heating loop, wherein the second heating power is smaller than the first heating power.
5. The temperature control method according to claim 1, 3 or 4, wherein the heating circuit comprises the second heat exchanger, a warm air water pump and a heater which are connected in sequence, and the step of heating the battery pack comprises:
controlling cooling liquid to heat the battery pack through the circulating pipeline; and
and controlling the antifreeze in the heating loop to be sequentially heated to a temperature higher than the coolant by the warm air water pump and the heater according to the set heating power, and performing heat exchange with the coolant through the second heat exchanger to heat the coolant.
6. The temperature control method as claimed in claim 1, further comprising an air conditioning branch connected across the first heat exchanger of the cooling circuit through a throttle valve to exchange heat of residual cool generated by air conditioning with the coolant in the circulation line through the first heat exchanger; and
the air conditioning branch is bridged at two ends of the second heat exchanger of the heating loop through a three-way valve so as to exchange heat between waste heat generated by air conditioning and cooling liquid in the circulating pipeline through the second heat exchanger.
7. The temperature control method according to claim 6,
the step of exchanging heat of the residual cold generated by air conditioning with the cooling liquid in the circulating pipeline through the first heat exchanger comprises the following steps of: when the temperature of the working medium in the air conditioning branch is lower than the temperature of the cooling liquid in the first heat exchanger, the throttle valve is opened, so that the working medium in the air conditioning branch exchanges heat with the cooling liquid in the first heat exchanger; and
the step of exchanging heat between the residual heat generated by air conditioning and the cooling liquid in the circulating pipeline through the second heat exchanger comprises the following steps of: when the temperature of the working medium in the air conditioning branch is higher than that of the cooling liquid in the second heat exchanger, the air conditioning branch is communicated with the second heat exchanger through the three-way valve, and the working medium in the air conditioning branch exchanges heat with the cooling liquid in the second heat exchanger.
8. The temperature control method according to claim 1, wherein the battery pack includes a plurality of battery modules, each of which includes a plurality of cell units, and at least a maximum temperature detection point and a minimum temperature detection point are provided in each of the battery modules.
9. A temperature control system of a battery pack, wherein the battery pack is connected in a circulation pipeline, the circulation pipeline comprises a first heat exchanger and a second heat exchanger, the first heat exchanger is further connected in a cooling loop, the second heat exchanger is further connected in a heating loop, the temperature control system comprises:
the detection module is used for detecting the temperature of each battery module of the battery pack;
the judging module is used for judging and processing the battery pack according to a highest temperature, a lowest temperature and the working mode of the battery pack;
the execution module is used for cooling the battery pack according to the highest temperature and at least one first high-temperature threshold value and heating the battery pack according to the lowest temperature and at least one first low-temperature threshold value when the battery pack is in a first charging mode; when the battery pack is in a second charging mode, the charging rate of the second charging mode is smaller than that of the first charging mode, and the battery pack is cooled according to the highest temperature and a second high-temperature threshold, wherein the second high-temperature threshold is larger than the first high-temperature threshold; heating the battery pack according to the lowest temperature and a second low-temperature threshold;
the step of cooling the battery pack according to the maximum temperature and at least one first high temperature threshold comprises:
when the maximum temperature is higher than the first high temperature threshold, sending a cooling control signal carrying first cooling power to the cooling loop; and
increasing the first cooling power as the maximum temperature increases in degrees beyond the first high temperature threshold; decreasing the first cooling power as the maximum temperature decreases in degrees beyond the first high temperature threshold;
the step of cooling the battery pack according to the maximum temperature and a second high temperature threshold comprises:
when the maximum temperature is higher than the second high temperature threshold, sending a cooling control signal carrying second cooling power to the cooling loop, wherein the second cooling power is smaller than the first cooling power;
the step of processing the battery pack further comprises:
if the battery pack is in a driving mode, cooling the battery pack according to the highest temperature and the second high-temperature threshold; and
and when the current vehicle speed in the driving mode exceeds a preset vehicle speed, increasing the second cooling power according to the difference value that the current vehicle speed exceeds the preset vehicle speed.
10. An electronic device, comprising:
a processor;
a memory having stored therein executable instructions of the processor;
wherein the processor is configured to perform the steps of the method of temperature control of a battery pack of any of claims 1 to 7 via execution of the executable instructions.
11. A computer-readable storage medium storing a program, wherein the program is executed to implement the steps of the temperature control method of a battery pack according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910893055.2A CN110600831B (en) | 2019-09-20 | 2019-09-20 | Temperature control method and system for battery pack, electronic device and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910893055.2A CN110600831B (en) | 2019-09-20 | 2019-09-20 | Temperature control method and system for battery pack, electronic device and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110600831A CN110600831A (en) | 2019-12-20 |
| CN110600831B true CN110600831B (en) | 2021-07-16 |
Family
ID=68861817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910893055.2A Active CN110600831B (en) | 2019-09-20 | 2019-09-20 | Temperature control method and system for battery pack, electronic device and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110600831B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112582731B (en) * | 2019-09-30 | 2022-09-09 | 比亚迪股份有限公司 | Battery module |
| CN111293375A (en) * | 2020-02-17 | 2020-06-16 | 威马智慧出行科技（上海）有限公司 | Electric automobile battery quick-charging temperature control method, electronic equipment and electric automobile |
| CN113525175A (en) * | 2020-04-16 | 2021-10-22 | 广州汽车集团股份有限公司 | Battery thermal management method and device and vehicle |
| CN112201879B (en) * | 2020-09-14 | 2021-08-27 | 恒大新能源汽车投资控股集团有限公司 | Heating control method and device for battery pack and electronic equipment |
| CN112776663A (en) * | 2021-02-25 | 2021-05-11 | 重庆金康赛力斯新能源汽车设计院有限公司 | Power supply method and device for electric automobile and electronic equipment |
| CN113163684A (en) * | 2021-04-07 | 2021-07-23 | 深圳威迈斯新能源股份有限公司 | Water-cooling vehicle-mounted converter device and control method thereof |
| CN113791655B (en) * | 2021-08-23 | 2022-12-02 | 深圳市科陆电子科技股份有限公司 | Temperature difference control method, device and equipment for energy storage system and storage medium |
| CN114142121A (en) * | 2021-10-28 | 2022-03-04 | 华为数字能源技术有限公司 | Energy storage system |
| CN113978203B (en) * | 2021-11-29 | 2024-03-22 | 浙江吉利控股集团有限公司 | Vehicle heat pump air conditioning system integrating battery thermal management function |
| CN114335813B (en) * | 2021-12-22 | 2024-05-10 | 奇瑞汽车股份有限公司 | Vehicle-mounted battery pack heating system method and control method thereof |
| CN114489176B (en) * | 2021-12-31 | 2023-04-07 | 北京京仪自动化装备技术股份有限公司 | Coupling temperature control system and method |
| CN114583336B (en) * | 2022-03-04 | 2023-12-19 | 阳光电源股份有限公司 | Anti-icing method and device for liquid-cooled battery, cooling system and energy storage system |
| CN118173945A (en) * | 2024-05-16 | 2024-06-11 | 四川博悦骋驰科技有限公司 | Optimizing method for carrying out thermal management on new energy battery |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104900935A (en) * | 2015-06-02 | 2015-09-09 | 安徽江淮汽车股份有限公司 | Charging heat management control method of battery pack |
| CN106025410A (en) * | 2016-07-22 | 2016-10-12 | 哈尔滨理工大学 | Battery low-temperature variable current heating method for electric vehicles |
| WO2017084840A1 (en) * | 2015-11-18 | 2017-05-26 | Jaguar Land Rover Limited | Controller and control method for activating temperature control of a device of a vehicle |
| CN107181017A (en) * | 2017-04-24 | 2017-09-19 | 北京长城华冠汽车科技股份有限公司 | A kind of electric automobile power battery temperature control system and method |
| CN108544973A (en) * | 2018-06-14 | 2018-09-18 | 上海牛仁汽车有限公司 | The control method of new energy car battery and its battery operated mode |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106785137B (en) * | 2016-12-25 | 2019-03-08 | 惠州市亿能电子有限公司 | Battery modules automate thermal management algorithm |
| CN108987848A (en) * | 2018-07-20 | 2018-12-11 | 威马智慧出行科技（上海）有限公司 | A kind of temprature control method of battery pack |
-
2019
- 2019-09-20 CN CN201910893055.2A patent/CN110600831B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104900935A (en) * | 2015-06-02 | 2015-09-09 | 安徽江淮汽车股份有限公司 | Charging heat management control method of battery pack |
| WO2017084840A1 (en) * | 2015-11-18 | 2017-05-26 | Jaguar Land Rover Limited | Controller and control method for activating temperature control of a device of a vehicle |
| CN106025410A (en) * | 2016-07-22 | 2016-10-12 | 哈尔滨理工大学 | Battery low-temperature variable current heating method for electric vehicles |
| CN107181017A (en) * | 2017-04-24 | 2017-09-19 | 北京长城华冠汽车科技股份有限公司 | A kind of electric automobile power battery temperature control system and method |
| CN108544973A (en) * | 2018-06-14 | 2018-09-18 | 上海牛仁汽车有限公司 | The control method of new energy car battery and its battery operated mode |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110600831A (en) | 2019-12-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110600831B (en) | Temperature control method and system for battery pack, electronic device and storage medium | |
| CN110588277B (en) | Electric automobile thermal management method and system and vehicle | |
| CN109585973B (en) | Power battery thermal management method and system | |
| CN108376808B (en) | Automobile battery temperature adjusting method | |
| CN111628237A (en) | Control method and device of battery thermal management system and controller | |
| WO2024109883A1 (en) | Power battery heating method and apparatus for hydrogen energy hybrid vehicle, medium, and device | |
| EP3915814A1 (en) | Vehicle thermal management system and vehicle | |
| US20240123797A1 (en) | Vehicle refrigeration control method, apparatus, device, medium and program product | |
| US20240123789A1 (en) | Vehicle heating control method and apparatus, device, medium, and program product | |
| CN115742871A (en) | Method, device, medium and equipment for heating power battery of hydrogen energy hybrid vehicle | |
| CN114919466A (en) | Thermal management control method and device, vehicle control unit and medium | |
| CN109659633B (en) | Automatic dock AGV battery temperature maintenance device and method | |
| CN115810772A (en) | Fuel cell heat management system with cold accumulation function | |
| CN114312471A (en) | Thermal management method and system for power battery of extended-range vehicle and storage medium | |
| CN112930095B (en) | Charging station temperature regulation and control system and regulation and control method | |
| CN114475360B (en) | Electric automobile motor cooling liquid recovery control method, electronic equipment and system | |
| CN214028292U (en) | Heating device of electric mixer truck and electric mixer truck | |
| CN111439111A (en) | Control method and control device of thermal management system, readable storage medium and vehicle | |
| CN114683807B (en) | Cooling control method, device and medium | |
| CN218975551U (en) | Novel power battery thermal management system | |
| CN219667962U (en) | Integrated heat management system for cooling motor and battery of pure electric vehicle | |
| US20240190212A1 (en) | Thermal management system, thermal management method, and computer device | |
| CN117621807A (en) | Vehicle thermal management method, device, equipment and storage medium | |
| CN117432022A (en) | Electric excavator heat dissipation system and method and electric excavator | |
| CN113328164A (en) | Vehicle thermal management control method and device and thermal management system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20230131 Granted publication date: 20210716 |
|
| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20240108 Granted publication date: 20210716 |
|
| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20240227 Granted publication date: 20210716 |