CN116190831B - Battery temperature control method and system - Google Patents
Battery temperature control method and system Download PDFInfo
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- CN116190831B CN116190831B CN202310455483.3A CN202310455483A CN116190831B CN 116190831 B CN116190831 B CN 116190831B CN 202310455483 A CN202310455483 A CN 202310455483A CN 116190831 B CN116190831 B CN 116190831B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/635—Control systems based on ambient temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
Abstract
The application discloses a battery temperature control method and a system, wherein in the process of charging a battery, if the internal temperature of the battery is not detected to be abnormal, the external temperatures of a plurality of areas of the battery are further obtained, and the temperature of the battery is reduced under the condition that target areas with abnormal external temperatures exist in the plurality of areas. Thereby improving reliability and flexibility of temperature monitoring of the battery and improving reliability of temperature control of the battery.
Description
Technical Field
The application relates to the field of vehicles, in particular to a battery temperature control method and system.
Background
In the field of electric automobiles, batteries are a major source of power for vehicles, and their safety performance is critical. In the battery charging process, the temperature of the battery is possibly abnormal, the working performance of the battery is reduced due to the abnormal temperature, and if the battery cannot be timely warned and managed, potential safety hazards can be brought.
Disclosure of Invention
In view of the above, the present application provides a battery temperature control method and system, in which a charging device sends a temperature detection instruction to a temperature detection device if an internal temperature abnormality of a battery is not detected in a process of charging the battery, so that the temperature detection device further detects external temperatures of a plurality of areas of the battery, and reduces the temperature of the battery in the case that a target area of the external temperature abnormality exists in the plurality of areas. Thereby improving reliability and flexibility of temperature monitoring of the battery and improving reliability of temperature control of the battery.
In one aspect, a battery temperature control method is provided, applied to a battery temperature control system, the method comprising:
if the internal temperature of the battery is not detected to be abnormal in the process of charging the battery, acquiring the external temperatures of a plurality of areas of the battery;
if there is a target region with abnormal external temperature among the plurality of regions, the temperature of the battery is lowered.
The battery temperature control system further detects the external temperatures of a plurality of regions of the battery and reduces the temperature of the battery if there is a target region of the external temperature abnormality in the plurality of regions, in the case that the internal temperature abnormality is not detected. Thereby improving reliability and flexibility of temperature monitoring of the battery and improving reliability of temperature control of the battery.
Optionally, the method further comprises:
for the external temperature of each region, if the external temperature is greater than or equal to the first preset temperature and less than the second preset temperature, and/or the temperature rising rate of the external temperature is greater than or equal to the preset rate, determining that the external temperature is abnormal;
wherein the second preset temperature is greater than the first preset temperature.
If the external temperature is greater than or equal to the first preset temperature and less than the second preset temperature, and/or the rate of temperature rise of the external temperature is greater than or equal to the preset rate, it may be determined that the external temperature of the region begins to experience thermal runaway, but the maximum temperature of thermal runaway is not currently reached. The temperature of the battery is prevented from continuously rising by reducing the temperature of the battery.
Optionally, after determining that there is a target area with an external temperature anomaly in the plurality of areas, the method further includes:
and stopping charging the battery if the external temperature of the target area is greater than or equal to the second preset temperature.
When the temperature of the target area is greater than or equal to the second preset temperature, the excessively high temperature of the battery may cause ignition or explosion of the battery, and further expansion of damage may be effectively prevented by stopping charging the battery.
Optionally, after the target area having the external temperature abnormality in the plurality of areas, the method further includes:
and sending out alarm information which is used for prompting the abnormal temperature of the battery. And the warning is carried out by sending out warning information, so that a user can acquire the abnormal temperature of the battery in time.
Optionally, reducing the temperature of the battery includes:
the charging power of the battery is reduced to achieve a reduction in the temperature of the battery.
Optionally, the battery is disposed in the vehicle, and the temperature of the battery is reduced, including:
if the battery management system in the vehicle is in a normal working state, a cooling instruction is sent to the battery management system, and the cooling instruction is used for indicating the battery management system to reduce the temperature of the battery. Thereby achieving a reduction in the temperature of the battery.
Optionally, the battery is disposed in the vehicle, and the method further comprises:
if the battery management system in the vehicle is in a fault state, or the battery management system is in a normal working state and receives a temperature normal instruction sent by the battery management system, determining that the internal temperature of the battery is not detected, wherein the temperature normal instruction is used for indicating that the internal temperature of the battery is normal.
Optionally, the battery is disposed in the vehicle, and the plurality of regions are regions of a bottom of the battery. Thereby monitoring whether an abnormality occurs in the temperature of the battery during the charging of the vehicle.
In another aspect, there is provided a battery temperature control system, the system comprising: a charging device and a temperature detecting device;
the charging equipment is connected with the temperature detection equipment and is used for sending a temperature detection instruction to the temperature detection equipment if the internal temperature of the battery is not detected to be abnormal in the process of charging the battery in the vehicle;
the temperature detection device is used for responding to the temperature detection instruction and acquiring the external temperatures of a plurality of areas of the battery; if the target area with abnormal external temperature exists in the areas, sending a temperature abnormal instruction to the charging equipment;
the charging device is also configured to reduce the temperature of the battery in response to the temperature abnormality command.
The charging device transmits a temperature detection instruction to the temperature detection device in a case where the internal temperature abnormality is not detected, so that the temperature detection device further detects the external temperatures of the plurality of regions of the battery, and reduces the temperature of the battery in a case where there is a target region of the external temperature abnormality in the plurality of regions. Thereby improving reliability and flexibility of temperature monitoring of the battery and improving reliability of temperature control of the battery.
Optionally, the temperature detecting device is further configured to:
for the external temperature of each region, if the external temperature is greater than or equal to the first preset temperature and less than the second preset temperature, and/or the temperature rising rate of the external temperature is greater than or equal to the preset rate, determining that the external temperature is abnormal;
wherein the second preset temperature is greater than the first preset temperature.
If the external temperature is greater than or equal to the first preset temperature and less than the second preset temperature, and/or the rate of temperature rise of the external temperature is greater than or equal to the preset rate, it may be determined that the external temperature of the region begins to experience thermal runaway, but the maximum temperature of thermal runaway is not currently reached. The temperature of the battery is prevented from continuously rising by reducing the temperature of the battery.
Optionally, the temperature detecting device is further configured to:
after the temperature of the battery is reduced, if the external temperature of the target area is greater than or equal to a second preset temperature, a charging stop instruction is sent to the charging equipment;
the charging device is further configured to stop charging the battery in response to the charging stop instruction.
When the temperature of the target area is greater than or equal to the second preset temperature, the excessively high temperature of the battery may cause ignition or explosion of the battery, and further expansion of damage may be effectively prevented by stopping charging the battery.
Optionally, the charging device is further configured to reduce the charging power of the battery.
Optionally, the temperature detecting device includes: the detection ranges of the infrared thermal imagers cover the infrared radiation range of the battery, and the infrared thermal imagers correspond to the areas one by one;
each infrared thermal imager is connected with the temperature detector, and is used for detecting the external temperature of the corresponding area and sending the detected external temperature to the temperature detector;
the temperature detector is also connected with the charging equipment and is used for sending a temperature abnormality instruction to the charging equipment if a target area with abnormal external temperature exists in the plurality of areas.
Additional aspects and advantages of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the application.
Drawings
Fig. 1 is a schematic structural diagram of a battery temperature control system according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a temperature detecting device according to an embodiment of the present application;
FIG. 3 is a schematic diagram of another temperature detecting device according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of still another temperature detecting device according to an embodiment of the present application;
fig. 5 is a schematic structural view of still another temperature detecting apparatus according to an embodiment of the present application;
fig. 6 is a flowchart of a battery temperature control method according to an embodiment of the present application.
Detailed Description
Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.
In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
In the description of the embodiments of the present application, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).
In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.
In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.
In the field of electric automobiles, batteries are a major source of power for vehicles, and their safety performance is critical. In the battery charging process, the temperature of the battery is possibly abnormal, the working performance of the battery is reduced due to the abnormal temperature, and if the battery cannot be timely warned and managed, potential safety hazards can be brought.
The applicant of the present application has found that the reliability of monitoring the internal temperature of the battery is low because the temperature sensor inside the battery cannot monitor the temperature of all areas of the battery during the process of charging the battery.
In addition, the applicant of the present application has found that a battery management system inside a vehicle can monitor the internal temperature of a battery and early warn in time when an abnormality occurs in the internal temperature of the battery. However, in the event of a failure of the battery management system, the battery management system cannot effectively monitor the internal temperature of the battery. In addition, even if the battery management system is in a normal operation state, the battery management system is generally unable to monitor the internal temperature of all areas of the battery, resulting in lower reliability of temperature monitoring of the battery.
The embodiment of the application provides a battery temperature control method, which is used for further acquiring the external temperatures of a plurality of areas of a battery in the process of charging the battery if the internal temperature of the battery is not detected to be abnormal, and reducing the temperature of the battery under the condition that target areas with abnormal external temperatures exist in the plurality of areas. Thereby improving reliability and flexibility of temperature monitoring of the battery and improving reliability of temperature control of the battery.
Fig. 1 is a schematic structural diagram of a battery temperature control system according to an embodiment of the present application, and as shown in fig. 1, the battery temperature control system 100 may include a charging device 11 and a temperature detecting device 12, where the charging device 11 may be a charging gun.
The charging device 11 is connected to the temperature detection device 12, the charging device 11 is configured to be connected to the battery 21, and the charging device 11 is configured to send a temperature detection instruction to the temperature detection device 12 if no abnormality in the internal temperature of the battery 21 is detected during charging of the battery 21. The battery 21 may be a battery pack.
The temperature detection device 12 is configured to acquire the external temperatures of a plurality of areas of the battery 21 in response to the temperature detection instruction, and if there is a target area in which the external temperatures are abnormal in the plurality of areas, the temperature abnormality instruction may be sent to the charging device 11. The charging device 11 is also configured to reduce the temperature of the battery 21 in response to the temperature abnormality instruction.
In summary, the embodiment of the present application provides a battery temperature control system, in which a charging device sends a temperature detection instruction to a temperature detection device when an internal temperature abnormality of a battery is not detected, so that the temperature detection device further detects external temperatures of a plurality of areas of the battery, and reduces the temperature of the battery when a target area having the external temperature abnormality exists in the plurality of areas. Thereby improving reliability and flexibility of temperature monitoring of the battery and improving reliability of temperature control of the battery.
The temperature detection device 12 is configured to, if it is determined that the external temperatures of the plurality of areas are all normal, dispense with sending a temperature abnormality instruction to the charging device 11.
In the embodiment of the application, the system provided by the embodiment of the application can only monitor the external temperature of the single battery, for example, in the battery production process, the battery maintenance process, the quick-change station or the off-line detection system (EOL) scene. In such an implementation, the temperature sensing device 12 may be located in various orientations of the battery 21, and the plurality of regions may be all regions of any orientation of the battery 21. For example, either orientation may be the bottom or top of the battery 21.
Referring to fig. 1, the battery 21 may also be provided in the vehicle 200, and the plurality of regions are regions of the bottom of the battery 21, including all regions of the bottom of the battery 21. The system provided by the embodiment of the application can also effectively monitor the external temperature of the battery 21 in the vehicle 200 in the process of charging the battery in the vehicle 200. In this implementation, the temperature detection device 12 is located outside of the vehicle 200 and at the bottom of the battery 21 in the vehicle 200.
Referring to fig. 2, the temperature detection device 12 may include a plurality of thermal infrared imagers 121 and a temperature detector (not shown in fig. 2), and it is understood that any object having a temperature may emit infrared rays, and the thermal infrared imagers 121 may receive infrared rays emitted from the object having a temperature. The temperature sensing device 12 may also include a housing 122, and the temperature detector and the plurality of thermal infrared imagers 121 may each be located within the housing 122.
Wherein the plurality of thermal infrared imagers 121 may cover the infrared radiation range of the battery 21. Alternatively, the plurality of infrared thermal imagers 121 may be in one-to-one correspondence with the plurality of regions, i.e., each infrared thermal imager 121 is configured to detect the temperature of one region, and the regions detected by different infrared thermal imagers 121 are different. This ensures that the detection ranges of the plurality of infrared thermal imagers 121 can cover a plurality of areas of the battery, thereby ensuring reliability of temperature detection of the battery 21.
Also, in the case where the battery 21 is provided in the vehicle 200, part of the infrared thermal imagers 121 among the plurality of infrared thermal imagers 121 may also detect the outside temperature around the bottom of the battery 21. The portion of the infrared thermal imager 121 may be located at an edge of the housing 122.
Referring to fig. 2 and 4, a plurality of thermal infrared imagers 121 are all located on the same side of the housing 122, and an array is distributed on the housing 122.
Each of the thermal infrared imagers 121 is connected to a temperature detector, and each of the thermal infrared imagers 121 is configured to detect an external temperature of a corresponding region and transmit the detected external temperature to the temperature detector.
A temperature detector is also connected to the charging device 11, and the temperature detector is configured to send a temperature abnormality instruction to the charging device 11 if there is a target area with an external temperature abnormality among a plurality of areas.
Referring to fig. 1 and 5 (vehicle 200 is not shown in fig. 5), during charging of vehicle 200, a worker may place temperature detection device 12 at the bottom of battery 21, and a plurality of thermal infrared imagers 121 are located on the side of housing 122 near the bottom of battery 21.
The temperature detector is further configured to determine, for an external temperature of each region, that the external temperature is abnormal if the external temperature is greater than or equal to a first preset temperature T1 and less than a second preset temperature T2, and/or a temperature rising rate of the external temperature is greater than or equal to a preset rate. The temperature detector may store a first preset temperature T1, a second preset temperature T2, and a preset rate in advance. The second preset temperature T2 is greater than the first preset temperature T1. For example, the first preset temperature T1 may be 45 degrees celsius (°c), and the second preset temperature T2 may be 150 ℃. The first preset temperature T1 is the lowest temperature of thermal runaway, and the second preset temperature T2 is the highest temperature of thermal runaway.
It will be appreciated that if the temperature detector determines that the external temperature is greater than or equal to the first preset temperature T1 and less than the second preset temperature T2, it may determine that the external temperature of the area starts to be out of control, but does not reach the maximum temperature of thermal control, so it may determine that the external temperature is abnormal and instruct the charging device 11 to cool the battery 21.
If the temperature detector determines that the temperature rising rate of the external temperature is greater than or equal to the preset rate, the temperature detector can determine that the temperature rising rate of the external temperature of the area is higher than a normal value, so that the external temperature starts to generate thermal runaway and is abnormal.
In an alternative implementation of the embodiment of the present application, the charging device 11 is used to reduce the charging power of the battery 21. The charging device 11 may reduce the charging power of the battery 21 in response to the temperature abnormality instruction, thereby achieving a reduction in the temperature of the battery 21.
In another alternative implementation of the embodiment of the present application, referring to fig. 1, a battery 21 is provided in a vehicle 200, and the charging device 11 is further used to connect with a battery management system 22. The charging device 11 is further configured to respond to a temperature abnormality instruction, and if the battery management system 22 in the vehicle 200 is in a normal operation state, send a cooling instruction to the battery management system 22, where the cooling instruction is used to instruct the battery management system 22 to lower the temperature of the battery 21.
The battery management system 22 may reduce the charging power of the battery 21 and/or reduce the cooling temperature of the water cooling plate in response to the cooling instruction, thereby achieving a reduction in the temperature of the battery 21.
In still another alternative implementation of the embodiment of the present application, referring to fig. 1, a battery 21 is provided in a vehicle 200, and a charging device 11 reduces the charging power of the battery 21 in response to a temperature abnormality instruction. And, if the battery management system 22 in the vehicle is in a normal operation state, the charging device 11 may transmit a cooling instruction to the battery management system 22, thereby ensuring a cooling effect.
The temperature detector is further configured to send a charge stop instruction to the charging device 11 if the external temperature of the target area is greater than or equal to the second preset temperature T2 after the charging device 11 reduces the temperature of the battery 21. The charging device 11 is configured to stop charging the battery 21 in response to a charging stop instruction.
If the external temperature of the target area is greater than or equal to the second preset temperature T2, the temperature detector may determine that the temperature of the battery 21 is still in an abnormal state after the battery 21 is cooled down and the maximum temperature of thermal runaway has been reached, so that it may be determined that the battery 21 has a defect (e.g., deformation or breakage, etc.), and may further transmit a charge stop instruction to the charging device 11.
It is understood that, after the temperature of the target area is greater than or equal to the second preset temperature T2, the excessively high temperature of the battery 21 may cause the battery to catch fire or explode, and by stopping the charging of the battery 21, the risk of failure in early warning due to the battery management system 22 inside the battery 21 can be effectively prevented, and further expansion of the damage can be effectively prevented.
Alternatively, a switching circuit may be provided in the charging device 11, and the charging device 11 may control the switching circuit to be turned off in response to the charging stop instruction, thereby stopping charging the battery 21. The switching circuit may be a relay circuit.
The temperature detector is further configured to send a temperature normal instruction to the charging device 11 if the external temperature of the target area is less than the first preset temperature and the temperature rising rate of the external temperature of the target area is less than the preset rate after the temperature of the battery 21 is reduced. The charging device 11 is configured to restore the charging power of the battery 21 in response to the temperature normal instruction.
In the embodiment of the present application, the temperature detector is further configured to send out alarm information for prompting the abnormal temperature of the battery 21 if it is determined that there is a target area with abnormal external temperature in a plurality of areas of the target area.
The charging device 11 is further configured to determine that the internal temperature of the battery 21 is not detected if the battery management system 22 in the vehicle is in a fault state, or if the battery management system 22 is in a normal operation state and a temperature normal instruction sent by the battery management system 22 is received, where the temperature normal instruction is used to indicate that the internal temperature of the battery 21 is normal.
It is understood that in the case where the battery management system 22 is in a failure state, the battery management system 22 cannot detect whether the internal temperature of the battery 21 is normal. The charging device 11 can determine that the internal temperature of the battery 21 is not detected to be normal in the case where it is detected that the battery management system 22 is in a failure state.
In the case where the battery management system 22 is in a normal operation state, the battery management system 22 can detect whether the temperature inside the battery 21 is normal. However, the battery management system 22 can monitor only the internal temperature of the partial region of the battery 21, and in the case where it is determined that the internal temperature of the partial region is normal, it can be determined that the internal temperature of the battery 21 is normal, and therefore a temperature normal instruction can be sent to the charging device 11.
The embodiment of the application adopts infrared imaging to evaluate the damage condition of the battery after bottom collision. Under the conditions that the water channel circulation is ensured to be normal, the deformation of the electric core is within a safe range, and the rest insulation and air tightness are normal, the temperature rise test is carried out on the battery, the temperature rise condition in the whole process is recorded by adopting infrared imaging, and the performance maintenance condition of the battery is evaluated.
The battery charging process monitoring method fills up industry measurement blind spots, is helpful for evaluating the safety and reliability of the battery, improves the early warning capability of the charging process, and is suitable for charging scenes, especially the battery which is damaged by bottom collision and the like.
In summary, the embodiment of the application provides a battery temperature control system, in which a charging device sends a temperature detection instruction to a temperature detection device when an internal temperature abnormality is not detected, so that the temperature detection device further detects the external temperatures of a plurality of areas at the bottom of a battery, and a target area with the abnormal external temperature exists in the plurality of areas, so that the temperature of the battery is reduced. Thereby improving reliability and flexibility of temperature monitoring of the battery and improving reliability of temperature control of the battery.
Fig. 6 is a flowchart of a battery temperature control method according to an embodiment of the present application, which may be applied to a battery temperature control system, as shown in fig. 6, and includes:
in step 601, if no abnormality in the internal temperature of the battery is detected during the battery charging process, the external temperatures of a plurality of areas of the battery are obtained.
In step 602, if there is a target area with abnormal external temperature in the plurality of areas, the temperature of the battery is reduced.
In summary, the embodiment of the application provides a battery temperature control method, in which, when the charging device does not detect the abnormal internal temperature of the battery, a temperature detection instruction is sent to the temperature detection device, so that the temperature detection device further detects the external temperatures of a plurality of areas of the battery, and a target area with abnormal external temperatures exists in the plurality of areas, so that the temperature of the battery is reduced. Thereby improving reliability and flexibility of temperature monitoring of the battery and improving reliability of temperature control of the battery.
Optionally, for the external temperature of each area, if the battery management system detects that the external temperature is greater than or equal to the first preset temperature and less than the second preset temperature, and/or the temperature rising rate of the external temperature is greater than or equal to the preset rate, it is determined that the external temperature is abnormal, and the second preset temperature is greater than the first preset temperature.
Optionally, after the temperature of the battery is reduced, the battery temperature control system stops charging the battery if the external temperature of the target area is greater than or equal to a second preset temperature.
Optionally, after determining that there is a target area with abnormal external temperature in the multiple areas, the battery temperature control system may further send out alarm information, where the alarm information is used to prompt that the temperature of the battery is abnormal.
In an alternative implementation manner of the embodiment of the present application, the charging power of the battery may be reduced by the charging device.
In another optional implementation manner of the embodiment of the present application, the battery is disposed in the vehicle, and if the battery temperature control system detects that the battery management system in the vehicle is in a normal working state, the battery temperature control system may send a cooling instruction to the battery management system, where the cooling instruction is used to instruct the battery management system to reduce the temperature of the battery.
The battery is arranged in the vehicle, and if the battery temperature control system detects that the battery management system in the vehicle is in a fault state or the battery management system is in a normal working state and receives a temperature normal instruction sent by the battery management system, the battery temperature control system determines that the internal temperature of the battery is not detected to be abnormal, and the temperature normal instruction is used for indicating that the internal temperature of the battery is normal.
In summary, the embodiment of the application provides a battery temperature control method, in which, when the charging device does not detect an internal temperature abnormality, a temperature detection instruction is sent to a temperature detection device, so that the temperature detection device further detects the external temperatures of a plurality of areas of the battery, and a target area with the abnormal external temperature exists in the plurality of areas, so that the temperature of the battery is reduced. Thereby improving reliability and flexibility of temperature monitoring of the battery and improving reliability of temperature control of the battery.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (13)
1. A battery temperature control method, characterized by being applied to a battery temperature control system, comprising:
acquiring the external temperatures of a plurality of areas of the battery if the internal temperature of the battery is not detected to be abnormal in the process of charging the battery;
and if a target area with abnormal external temperature exists in the plurality of areas, reducing the temperature of the battery.
2. The method according to claim 1, wherein the method further comprises:
for the external temperature of each region, if the external temperature is greater than or equal to a first preset temperature and less than a second preset temperature, and/or the temperature rising rate of the external temperature is greater than or equal to a preset rate, determining that the external temperature is abnormal;
wherein the second preset temperature is greater than the first preset temperature.
3. The method of claim 2, wherein after reducing the temperature of the battery, the method further comprises:
and stopping charging the battery if the external temperature of the target area is greater than or equal to a second preset temperature.
4. A method according to any one of claims 1 to 3, wherein after determining that there is a target region of external temperature abnormality among a plurality of the regions, the method further comprises:
and sending out alarm information, wherein the alarm information is used for prompting the abnormal temperature of the battery.
5. A method according to any one of claims 1 to 3, wherein reducing the temperature of the battery comprises:
reducing the charging power of the battery.
6. A method according to any one of claims 1 to 3, wherein the battery is provided in a vehicle, and reducing the temperature of the battery comprises:
and if the battery management system in the vehicle is in a normal working state, sending a cooling instruction to the battery management system, wherein the cooling instruction is used for indicating the battery management system to reduce the temperature of the battery.
7. A method according to any one of claims 1 to 3, wherein the battery is provided in a vehicle, the method further comprising:
if the battery management system in the vehicle is in a fault state, or the battery management system is in a normal working state and receives a temperature normal instruction sent by the battery management system, determining that the internal temperature of the battery is not detected, wherein the temperature normal instruction is used for indicating that the internal temperature of the battery is normal.
8. A method according to any one of claims 1 to 3, wherein the battery is provided in a vehicle and the plurality of regions are regions of the battery bottom.
9. A battery temperature control system, the system comprising: a charging device and a temperature detecting device;
the charging equipment is connected with the temperature detection equipment and is used for sending a temperature detection instruction to the temperature detection equipment if the internal temperature of the battery is not detected to be abnormal in the process of charging the battery;
the temperature detection device is used for responding to the temperature detection instruction and acquiring the external temperatures of a plurality of areas of the battery; if the target areas with abnormal external temperature exist in the areas, sending a temperature abnormal instruction to the charging equipment;
the charging device is further configured to reduce a temperature of the battery in response to the temperature abnormality instruction.
10. The system of claim 9, wherein the temperature detection device is further configured to:
for the external temperature of each region, if the external temperature is greater than or equal to a first preset temperature and less than a second preset temperature, and/or the temperature rising rate of the external temperature is greater than or equal to a preset rate, determining that the external temperature is abnormal;
wherein the second preset temperature is greater than the first preset temperature.
11. The system of claim 10, wherein the temperature detection device is further configured to:
after the temperature of the battery is reduced, if the external temperature of the target area is greater than or equal to a second preset temperature, a charging stop instruction is sent to the charging equipment;
the charging device is configured to stop charging the battery in response to the charging stop instruction.
12. The system of any of claims 9 to 11, wherein the charging device is further configured to reduce the charging power of the battery.
13. The system according to any one of claims 9 to 11, wherein the temperature detection device comprises: the detection ranges of the infrared thermal imagers cover the infrared radiation range of the battery, and the infrared thermal imagers are in one-to-one correspondence with the areas;
each thermal infrared imager is connected with the temperature detector, and is used for detecting the external temperature of a corresponding area and sending the detected external temperature to the temperature detector;
the temperature detector is also connected with the charging equipment, and is used for sending the temperature abnormality instruction to the charging equipment if target areas with abnormal external temperature exist in a plurality of areas.
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