CN114454777A - Power battery thermal management method, device, medium and electronic equipment - Google Patents
Power battery thermal management method, device, medium and electronic equipment Download PDFInfo
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- CN114454777A CN114454777A CN202011249801.3A CN202011249801A CN114454777A CN 114454777 A CN114454777 A CN 114454777A CN 202011249801 A CN202011249801 A CN 202011249801A CN 114454777 A CN114454777 A CN 114454777A
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- 238000001816 cooling Methods 0.000 claims abstract description 45
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
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- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/545—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
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Abstract
The disclosure relates to a power battery thermal management method, a power battery thermal management device, a power battery thermal management medium and electronic equipment. The method comprises the following steps: acquiring road condition information of a road section in front of a vehicle; judging whether the vehicle is about to enter a target driving state according to the road condition information, wherein the target driving state comprises a high-power demand driving state and a low-power demand driving state; if the vehicle is about to enter a target driving state, adjusting a preset temperature interval of the power battery according to the target driving state; and controlling the work of the battery cooling unit according to the adjusted preset temperature interval. Like this, can control power battery's temperature in advance before the vehicle gets into target drive state to can satisfy the different power demands of vehicle when guaranteeing that the battery operation in the best ambient temperature within range, and then promote user's driving experience, and, can ensure power battery's discharge performance, prolong the life of battery.
Description
Technical Field
The disclosure relates to the technical field of battery management, in particular to a power battery thermal management method, device, medium and electronic equipment.
Background
The power battery is used as a core component of a pure electric vehicle or a hybrid vehicle, is the only or main power source of the vehicle, and plays a decisive role in the working performance of the vehicle. When the vehicle runs under different driving conditions of high speed, low speed, acceleration, deceleration and the like which are alternately changed, the power battery can be discharged at different rates, heat can be generated at different heat generation rates, and the temperature of the battery can be increased.
The discharge power of the power battery is closely related to the battery temperature, and the discharge performance of the power battery is affected by over-high or over-low battery temperature. Generally, the discharge performance of a power battery is best when the battery temperature is within an optimal temperature range (e.g., 25 ℃ to 30 ℃). One of the main objectives of the power battery thermal management strategy is to make the battery temperature within the above-mentioned optimal temperature range as possible to ensure the discharge performance of the power battery.
In the related art, the following power battery thermal management strategies are generally adopted: when the battery temperature is higher than a first preset temperature (for example, 35 ℃), the power battery is cooled by a battery cooling unit (for example, an air conditioner compressor) until the battery temperature is lower than a second preset temperature (for example, 31 ℃), and the cooling is stopped. Wherein, during the vehicle driving process, power battery is used for satisfying vehicle power demand and cooling demand. Therefore, when the power battery is subjected to thermal management, although the battery can be ensured to operate in the optimal environment temperature range, the power requirement of the vehicle can not be met, and the driving experience of a user is influenced.
Disclosure of Invention
In order to overcome the problems in the related art, the disclosure provides a power battery thermal management method, a device, a medium and an electronic device.
In order to achieve the above object, in a first aspect, the present disclosure provides a power battery thermal management method, including:
acquiring road condition information of a road section in front of a vehicle;
judging whether the vehicle is about to enter a target driving state according to the road condition information, wherein the target driving state comprises a high-power demand driving state and a low-power demand driving state;
if the vehicle is about to enter the target driving state, adjusting a preset temperature interval of a power battery according to the target driving state, wherein the upper limit temperature of the preset temperature interval is an initial cooling temperature, and the lower limit temperature of the preset temperature interval is a stop cooling temperature;
and controlling the work of the battery cooling unit according to the adjusted preset temperature interval.
Optionally, the adjusting the preset temperature interval of the power battery according to the target driving state includes:
reducing the upper limit temperature and the lower limit temperature if the target driving state is the high power demand driving state;
increasing the upper limit temperature and the lower limit temperature if the target driving state is the low power demand driving state.
Optionally, before the step of adjusting the preset temperature interval of the power battery, the method further includes:
if the vehicle is about to enter the target driving state, acquiring a target length and a target gradient of a road section of the vehicle which is about to be in the target driving state;
determining target variable quantities corresponding to the target driving state, the target length and the target gradient according to corresponding relations among preset vehicle driving states, road section lengths, road section gradients and variable quantities, wherein the variable quantities respectively have positive correlations with the road section lengths and the road section gradients;
the reducing the upper limit temperature and the lower limit temperature of the preset temperature interval includes:
reducing the upper limit temperature and the lower limit temperature by the target amount of change, respectively;
the increasing of the upper limit temperature and the lower limit temperature of the preset temperature interval includes:
the upper limit temperature and the lower limit temperature are increased by the target amount of change, respectively.
Optionally, the determining whether the vehicle is about to enter a target driving state according to the road condition information includes:
when the road condition information represents that the front road section is a high-speed road section or an uphill road section, determining that the vehicle is about to enter a high-power-demand driving state;
and when the road condition information represents that the front road section is a congested road section or a speed-limiting road section, determining that the vehicle is about to enter a low-power-demand driving state.
Optionally, after the step of controlling the operation of the battery cooling unit, the method further comprises:
and after the vehicle enters the target driving state, recovering the preset temperature interval to the temperature interval before adjustment, and controlling the work of the battery cooling unit according to the recovered preset temperature interval.
Optionally, the acquiring the road condition information of the road segment ahead of the vehicle includes:
acquiring the current position and path planning information of a vehicle;
and determining road condition information of a road section in front of the vehicle according to the path planning information and the current position.
In a second aspect, the present disclosure provides a power battery thermal management device, including:
the acquisition module is used for acquiring road condition information of a road section in front of the vehicle;
the judging module is used for judging whether the vehicle is about to enter a target driving state according to the road condition information acquired by the acquiring module, wherein the target driving state comprises a high-power-demand driving state and a low-power-demand driving state;
the adjusting module is used for adjusting a preset temperature interval of a power battery according to the target driving state if the judging module determines that the vehicle is about to enter the target driving state, wherein the upper limit temperature of the preset temperature interval is an initial cooling temperature, and the lower limit temperature of the preset temperature interval is a stop cooling temperature;
and the control module is used for controlling the work of the battery cooling unit according to the adjusted preset temperature interval obtained by the adjusting module.
Optionally, the adjusting module is configured to:
reducing the upper limit temperature and the lower limit temperature if the target driving state is the high power demand driving state;
increasing the upper limit temperature and the lower limit temperature if the target driving state is the low power demand driving state.
In a third aspect, the present disclosure provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method provided by the first aspect of the present disclosure.
In a fourth aspect, the present disclosure provides an electronic device comprising:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to implement the steps of the method provided by the first aspect of the present disclosure.
In the above technical solution, if it is determined that the vehicle is about to enter a target driving state (where the target driving state includes a high power demand driving state or a low power demand driving state) according to road condition information of a road section ahead of the vehicle, a preset temperature range of the power battery is adjusted according to the target driving state, and then the operation of the battery cooling unit is controlled according to the adjusted preset temperature range. Like this, can control power battery's temperature in advance before the vehicle gets into target driving state to can satisfy the different power demands of vehicle when guaranteeing that the battery operation is in the best ambient temperature within range, and then promote user's driving experience, and, can ensure power battery's discharge performance, prolong the life of battery.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure, but do not constitute a limitation of the disclosure. In the drawings:
FIG. 1 is a flow chart illustrating a method for thermal management of a power cell in accordance with an exemplary embodiment.
FIG. 2 is a flow chart illustrating a method of power cell thermal management according to another exemplary embodiment.
FIG. 3 is a flow chart illustrating a method of power cell thermal management according to another exemplary embodiment.
FIG. 4 is a block diagram illustrating a power cell thermal management apparatus according to an exemplary embodiment.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
FIG. 1 is a flow chart illustrating a method for thermal management of a power cell in accordance with an exemplary embodiment. As shown in fig. 1, the method includes S101 to S105.
In S101, road condition information of a road section ahead of the vehicle is acquired.
In the present disclosure, a vehicle (e.g., an automobile, a bicycle, a motorcycle, etc.) may be a purely electric vehicle, but may also be a hybrid vehicle. The traffic information of the road section ahead of the vehicle may be the traffic information of the road ahead at a preset distance from the current position of the vehicle, wherein the traffic information may include road types (including high speed, urban road, rural road), road grade information, traffic congestion conditions (including clear, slow, congested) and speed limit conditions (for example, 30km/h speed limit of the road section ahead).
In S102, it is determined whether the vehicle is about to enter the target driving state according to the traffic information.
In the present disclosure, the vehicle driving state includes a low power-demand driving state, a medium power-demand driving state, and a high power-demand driving state, wherein the target driving state includes a high power-demand driving state and a low power-demand driving state.
In addition, when the distance between the current position of the vehicle and the start position of the target link is less than or equal to a preset distance threshold (e.g., 3 kilometers), or the travel time period of the vehicle from the current position to the start position of the target link is within a preset time period threshold (e.g., 10 minutes), it may be considered that the vehicle is about to enter the target driving state, wherein the target link is a link in which the vehicle is about to be in the target driving state.
If the fact that the vehicle is about to enter the target driving state is determined according to the road condition information, S103 and S104 are executed; otherwise, S105 is directly performed.
In S103, a preset temperature interval of the power battery is adjusted according to the target driving state.
In the present disclosure, the upper limit temperature of the preset temperature interval is the start cooling temperature, and the lower limit temperature of the preset temperature interval is the stop cooling temperature, that is, when the current temperature of the power battery reaches the upper limit temperature, the power battery is cooled by a battery cooling unit (for example, an air conditioner compressor), and until the battery temperature reaches the lower limit temperature, the power battery is stopped from being cooled. Wherein the start cooling temperature is greater than the stop cooling temperature.
In S104, the operation of the battery cooling unit is controlled according to the adjusted preset temperature interval.
In the disclosure, if the current temperature of the power battery is lower than the upper limit temperature of the adjusted preset temperature interval, the power battery is not cooled, and at this time, the battery cooling unit does not work or is used for other purposes (for example, the battery cooling unit is an air conditioner compressor, and at this time, it may be used for in-vehicle refrigeration); and if the current temperature of the power battery is higher than or equal to the upper limit temperature of the adjusted preset temperature interval, cooling the power battery by using the battery cooling unit, and stopping cooling the power battery until the current temperature of the power battery is lower than or equal to the lower limit temperature.
In S105, the operation of the battery cooling unit is controlled according to the preset temperature interval of the power battery.
In the above technical solution, if it is determined that the vehicle is about to enter a target driving state (where the target driving state includes a high power demand driving state or a low power demand driving state) according to the road condition information of the road section ahead of the vehicle, a preset temperature interval of the power battery is adjusted according to the target driving state, and then the operation of the battery cooling unit is controlled according to the adjusted preset temperature interval. Like this, can control power battery's temperature in advance before the vehicle gets into target drive state to can satisfy the different power demands of vehicle when guaranteeing that the battery operation in the best ambient temperature within range, and then promote user's driving experience, and, can ensure power battery's discharge performance, prolong the life of battery.
The following is a detailed description of a specific embodiment of acquiring the road condition information of the road section ahead of the vehicle in S101.
In one embodiment, the road condition information for the road segment ahead of the vehicle may be provided directly by the vehicle navigation system.
In another embodiment, the current position and the route planning information of the vehicle may be obtained first, and then the road condition information of the road section ahead of the vehicle may be determined based on the current position and the route planning information.
Wherein the current position of the vehicle may be acquired based on a satellite positioning system. The path planning information is a driving path of the vehicle from a departure place to a destination, and the path planning information can be generated by a satellite positioning system and an electronic map module.
The following is a detailed description of a specific embodiment of determining whether the vehicle is about to enter the target driving state according to the traffic information in S102. Specifically, when the road condition information indicates that the road section in front is a high-speed road section or an uphill road section, determining that the vehicle is about to enter a high-power-demand driving state; and when the road condition information represents that the front road section is a congested road section or a speed-limiting road section, determining that the vehicle is about to enter a low-power-demand driving state. That is, when the road condition information indicates that the road section ahead is a highway section, an uphill section, a congested section or a speed-limiting section, it can be determined that the vehicle is about to enter a target driving state; otherwise, it may be determined that the vehicle remains in a current driving state, e.g., a medium power demand driving state.
A detailed description will be given below of an embodiment of adjusting the preset temperature interval of the power battery according to the target driving state in S103. Specifically, if the target driving state is the high power demand driving state, the upper limit temperature and the lower limit temperature of the preset temperature interval of the power battery are reduced. And if the target driving state is the low-power-demand driving state, increasing the upper limit temperature and the lower limit temperature of the preset temperature interval of the power battery.
In the case where the target drive state is the high power-demand drive state: when the vehicle is about to enter the high-power-demand driving state, the upper limit value and the lower limit value of the preset temperature interval of the power battery are reduced, so that the power battery can be in the optimal temperature range in advance before the vehicle enters the high-power-demand driving state, and the power required by cooling the battery after the vehicle enters the high-power-demand driving state can be reduced. Therefore, more power can be reserved to meet the high-power requirement of a user, so that the power performance of the vehicle is ensured, and the driving experience of the user is improved.
In the case where the target drive state is the low power-demand drive state: when the vehicle is about to enter the low power demand driving state, the battery cooling operation can be performed after the vehicle enters the low power demand driving state as much as possible by increasing the upper limit value and the lower limit value of the preset temperature interval of the power battery, so that the power required for cooling the battery before the vehicle enters the low power demand driving state can be reduced. In this way, more power can be reserved to meet the current power demand of the user, thereby improving the driving experience of the user.
In the present disclosure, the upper limit temperature and the lower limit temperature of the preset temperature interval of the power battery may be increased or decreased in various ways. In one embodiment, if the target driving state is a high power demand driving state, the upper limit temperature and the lower limit temperature of the preset temperature interval of the power battery can be directly reduced by a first preset temperature threshold; and if the target driving state is the low-power-demand driving state, directly increasing the upper limit temperature and the lower limit temperature of the preset temperature interval of the power battery by a second preset temperature threshold.
In another embodiment, the target amounts of change in the upper limit temperature and the lower limit temperature may be dynamically changed depending on the target driving state and the road condition. That is, the target amount of change may be determined before the preset temperature interval of the power battery is adjusted, and then the preset temperature interval of the power battery may be adjusted based on the target amount of change. Wherein the above-mentioned target amount of change can be determined by S106 and S107 shown in fig. 2.
In S106, a target length and a target gradient of a road section where the vehicle will be in a target driving state are acquired.
In the present disclosure, if the vehicle is about to enter the target driving state, the target length and the target gradient of the road section where the vehicle will be in the target driving state are acquired.
In S107, a target variation amount corresponding to the target driving state, the target length, and the target gradient is determined according to a correspondence relationship among preset vehicle driving states, link lengths, link gradients, and variation amounts.
In the present disclosure, the correspondence between the driving state of the vehicle, the length of the road section, the gradient of the road section, and the variation (the value range is (0 ℃, 5 ℃)) may be calibrated in advance by the user, and may be stored in the form of a table, for example. In this way, after the target length and the target gradient are acquired, the target variation corresponding to the target driving state, the target length, and the target gradient can be acquired by querying the correspondence table. In the above correspondence, the variation is positively correlated with the road section length and the road section gradient, that is, the variation increases with the increase of the road section length and the road section gradient and decreases with the decrease of the road section length and the road section gradient. Therefore, the power requirements of the vehicle under different road conditions can be met as far as possible while the battery is ensured to operate in the optimal environment temperature range.
After the target variation is determined, the upper limit temperature and the lower limit temperature of the preset temperature interval of the power battery can be adjusted in the following manner: if the target driving state is a high-power-demand driving state, respectively reducing the upper limit temperature and the lower limit temperature of a preset temperature interval of the power battery by target variable quantity; and if the target driving state is the high-power-demand driving state, respectively increasing the upper limit temperature and the lower limit temperature of the preset temperature interval of the power battery by the target variable quantity.
FIG. 3 is a flow chart illustrating a method of power cell thermal management according to another exemplary embodiment. As shown in fig. 3, after the step S104, the method may further include a step S108.
In S108, after the vehicle enters the target driving state, the preset temperature interval is restored to the temperature interval before adjustment, and the operation of the battery cooling unit is controlled according to the restored preset temperature interval.
After the vehicle enters a high-power-demand driving state, the temperature rise of the power battery is fast, and if the adjusted preset temperature interval (namely, the lower temperature upper limit and the lower temperature lower limit) is still used at the moment, the work of the battery cooling unit is controlled, so that the battery is frequently cooled, and thus, the high-power demand of a user can not be met and the user experience is influenced. Therefore, after the vehicle enters a high-power demand driving state, the preset temperature interval of the power battery can be recovered to the temperature interval before adjustment, namely, the upper temperature limit and the lower temperature limit are increased, the battery is prevented from being cooled frequently, more power is reserved as far as possible, the high-power demand of a user is met, the power performance of the vehicle is guaranteed, and the driving experience of the user is improved.
After the vehicle enters the low power demand driving state, the power required by the vehicle is relatively small, and at this time, the power battery can be effectively cooled without affecting the power performance of the vehicle. Therefore, after the vehicle enters the low power demand driving state, the preset temperature interval of the power battery can be restored to the temperature interval before adjustment, that is, the upper temperature limit and the lower temperature limit are reduced.
FIG. 4 is a block diagram illustrating a power cell thermal management apparatus according to an exemplary embodiment. As shown in fig. 4, the apparatus 400 includes: an obtaining module 401, configured to obtain road condition information of a road section ahead of a vehicle; a determining module 402, configured to determine whether the vehicle is about to enter a target driving state according to the road condition information acquired by the acquiring module 401, where the target driving state includes a high power demand driving state and a low power demand driving state; an adjusting module 403, configured to adjust a preset temperature interval of a power battery according to the target driving state if the determining module 402 determines that the vehicle is about to enter the target driving state, where an upper limit temperature of the preset temperature interval is an initial cooling temperature, and a lower limit temperature of the preset temperature interval is a stop cooling temperature; and a control module 404, configured to control operation of the battery cooling unit according to the adjusted preset temperature interval obtained by the adjusting module 403.
In the above technical solution, if it is determined that the vehicle is about to enter a target driving state (where the target driving state includes a high power demand driving state or a low power demand driving state) according to the road condition information of the road section ahead of the vehicle, a preset temperature interval of the power battery is adjusted according to the target driving state, and then the operation of the battery cooling unit is controlled according to the adjusted preset temperature interval. Like this, can control power battery's temperature in advance before the vehicle gets into target drive state to can satisfy the different power demands of vehicle when guaranteeing that the battery operation in the best ambient temperature within range, and then promote user's driving experience, and, can ensure power battery's discharge performance, prolong the life of battery.
Optionally, the adjusting module 403 is configured to: reducing the upper limit temperature and the lower limit temperature if the target driving state is the high power demand driving state; increasing the upper limit temperature and the lower limit temperature if the target driving state is the low power demand driving state.
Optionally, the apparatus 400 further comprises: a length gradient obtaining module, configured to, before the adjusting module 43 adjusts the preset temperature interval of the power battery, obtain a target length and a target gradient of a road section where the vehicle is to be in the target driving state if the vehicle is about to enter the target driving state; the determining module is used for determining target variable quantities corresponding to the target driving state, the target length and the target gradient according to corresponding relations among preset vehicle driving states, road section lengths, road section gradients and variable quantities, wherein the variable quantities are positively correlated with the road section lengths and the road section gradients respectively; the adjustment module is configured to: if the target driving state is the high power demand driving state, reducing the upper limit temperature and the lower limit temperature by the target variation amount, respectively; if the target driving state is the low power demand driving state, the upper limit temperature and the lower limit temperature are respectively increased by the target variation amount.
Optionally, the determining module 402 is configured to: when the road condition information represents that the front road section is a high-speed road section or an uphill road section, determining that the vehicle is about to enter a high-power-demand driving state; and when the road condition information represents that the front road section is a congested road section or a speed-limiting road section, determining that the vehicle is about to enter a low-power-demand driving state.
Optionally, the control module 404 is further configured to, after controlling the operation of the battery cooling unit and after the vehicle enters the target driving state, restore the preset temperature interval to the temperature interval before adjustment, and control the operation of the battery cooling unit according to the restored preset temperature interval.
Optionally, the obtaining module 401 includes: the obtaining submodule is used for obtaining the current position and the path planning information of the vehicle; and the determining submodule is used for determining the road condition information of the road section in front of the vehicle according to the path planning information and the current position.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (10)
1. A power battery thermal management method is characterized by comprising the following steps:
acquiring road condition information of a road section in front of a vehicle;
judging whether the vehicle is about to enter a target driving state according to the road condition information, wherein the target driving state comprises a high-power demand driving state and a low-power demand driving state;
if the vehicle is about to enter the target driving state, adjusting a preset temperature interval of a power battery according to the target driving state, wherein the upper limit temperature of the preset temperature interval is an initial cooling temperature, and the lower limit temperature of the preset temperature interval is a stop cooling temperature;
and controlling the work of the battery cooling unit according to the adjusted preset temperature interval.
2. The method according to claim 1, wherein the adjusting the preset temperature interval of the power battery according to the target driving state comprises:
reducing the upper limit temperature and the lower limit temperature if the target driving state is the high power demand driving state;
increasing the upper limit temperature and the lower limit temperature if the target driving state is the low power demand driving state.
3. The method according to claim 2, wherein prior to the step of adjusting the preset temperature interval of the power cell, the method further comprises:
if the vehicle is about to enter the target driving state, acquiring a target length and a target gradient of a road section of the vehicle which is about to be in the target driving state;
determining target variable quantities corresponding to the target driving state, the target length and the target gradient according to corresponding relations among preset vehicle driving states, road section lengths, road section gradients and variable quantities, wherein the variable quantities respectively have positive correlations with the road section lengths and the road section gradients;
the reducing the upper limit temperature and the lower limit temperature of the preset temperature interval includes:
reducing the upper limit temperature and the lower limit temperature by the target amount of change, respectively;
the increasing of the upper limit temperature and the lower limit temperature of the preset temperature interval includes:
the upper limit temperature and the lower limit temperature are increased by the target amount of change, respectively.
4. The method of claim 1, wherein the determining whether the vehicle is about to enter a target driving state according to the road condition information comprises:
when the road condition information represents that the front road section is a high-speed road section or an uphill road section, determining that the vehicle is about to enter a high-power-demand driving state;
and when the road condition information represents that the front road section is a congested road section or a speed-limiting road section, determining that the vehicle is about to enter a low-power-demand driving state.
5. The method of any of claims 1-4, wherein after the step of controlling operation of the battery cooling unit, the method further comprises:
and after the vehicle enters the target driving state, recovering the preset temperature interval to the temperature interval before adjustment, and controlling the work of the battery cooling unit according to the recovered preset temperature interval.
6. The method according to any one of claims 1-4, wherein the obtaining road condition information of the road section ahead of the vehicle comprises:
acquiring the current position and path planning information of a vehicle;
and determining road condition information of a road section in front of the vehicle according to the path planning information and the current position.
7. A power battery thermal management device, comprising:
the acquisition module is used for acquiring road condition information of a road section in front of the vehicle;
the judging module is used for judging whether the vehicle is about to enter a target driving state according to the road condition information acquired by the acquiring module, wherein the target driving state comprises a high-power-demand driving state and a low-power-demand driving state;
the adjusting module is used for adjusting a preset temperature interval of a power battery according to the target driving state if the judging module determines that the vehicle is about to enter the target driving state, wherein the upper limit temperature of the preset temperature interval is an initial cooling temperature, and the lower limit temperature of the preset temperature interval is a stop cooling temperature;
and the control module is used for controlling the work of the battery cooling unit according to the adjusted preset temperature interval obtained by the adjusting module.
8. The apparatus of claim 7, wherein the adjustment module is configured to:
reducing the upper limit temperature and the lower limit temperature if the target driving state is the high power demand driving state;
increasing the upper limit temperature and the lower limit temperature if the target driving state is the low power demand driving state.
9. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 6.
10. An electronic device, comprising:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to carry out the steps of the method of any one of claims 1 to 6.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116198285A (en) * | 2023-05-06 | 2023-06-02 | 北京易控智驾科技有限公司 | Thermal management system, thermal management method, electronic device, and vehicle |
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