Heating device for an electric vehicle traction battery and related apparatus

Abstract

The application provides a heating device for a power battery of an electric vehicle and related equipment. The heating device comprises a temperature control module and a heater. The temperature control module is used to control the heater to heat the power battery according to a comparison result of a cell temperature of the power battery and a preset temperature. The heating device can obtain a connection state of the power battery and an external power source from a vehicle-mounted charger, and obtain the cell temperature and a remaining power of the power battery from a battery management system. The heating device starts or stops the temperature control module according to current battery demand information, the remaining power and the connection state, so as to balance the driving performance and the cruising range of the electric vehicle in a low-temperature environment.

Description

Technical Field

[0001] This application relates to the field of electric vehicles, and more particularly to a heating device and related equipment for a power battery of an electric vehicle. Background Technology

[0002] In electric vehicles, low cell temperatures in the battery pack lead to performance degradation. Typically, the battery is heated to raise the cell temperature, thereby improving battery performance and ultimately enhancing the vehicle's driving performance and experience. However, heating the battery depletes its remaining charge, reducing the vehicle's driving range. Summary of the Invention

[0003] This application provides a heating device and related equipment for electric vehicle power batteries, which can balance the driving range and driving performance of electric vehicles in low-temperature environments.

[0004] The present application is described below from different aspects. It should be understood that the different implementation methods and beneficial effects described below can be referenced from each other.

[0005] In a first aspect, this application provides a heating device for a power battery in an electric vehicle. The electric vehicle includes an on-board charger, a battery management system, a power battery, and a heating device. The heating device includes a temperature control module and a heater. The heater is used to heat the power battery. The temperature control module receives the cell temperature of the power battery from the battery management system and controls the heater to heat the power battery based on a comparison between the cell temperature and a preset temperature. The heating device acquires current battery demand information of the electric vehicle, receives the connection status of the power battery to an external power source from the on-board charger, receives the remaining charge of the power battery from the battery management system, and controls the heater to turn the temperature control module on or off based on the current battery demand information for the electric vehicle's next trip, the remaining charge of the power battery, and the connection status of the power battery to the external power source.

[0006] In this embodiment, the current battery demand information includes at least one of a power demand value or a battery charge demand value. The preset demand value includes a preset power demand value and a preset power demand value.

[0007] In this embodiment, the heating device can not only control the heater to heat the power battery based on the comparison between the battery cell temperature and the preset temperature, but also determine whether to control the heater to heat the power battery based on the current battery demand information of the electric vehicle, the remaining power of the power battery, and the connection status of the power battery with the external power source. Accordingly, the heating device provided in this embodiment can not only improve the driving performance and driving experience of the electric vehicle by increasing the battery cell temperature, but also reduce unnecessary power loss caused by power battery heating, thereby increasing the driving range of the electric vehicle.

[0008] In conjunction with the first aspect, in a first possible implementation, the heating device is used to turn the temperature control module on or off in response to the comparison result of the current battery demand information with the preset demand value, the comparison result of the remaining power with the preset power, and the connection status of the power battery and the external power source.

[0009] In conjunction with the first possible implementation of the first aspect, in the second possible implementation, the heating device is configured to activate the temperature control module in response to the current battery demand information indicating that the power demand value is greater than or equal to a preset demand value, the remaining power is greater than or equal to a preset power, and the power battery is connected to an external power source. Conversely, the heating device is configured to deactivate the temperature control module in response to the current battery demand information indicating that the power demand value is less than a preset demand value, the remaining power is less than or equal to a preset power, and the power battery is not connected to an external power source.

[0010] In this embodiment, the heating device is used to turn the temperature control module on or off according to the comparison results of the current battery demand information and the preset demand value, the comparison results of the remaining power capacity and the preset power capacity, and the connection status of the power battery and the external power source. Accordingly, the heating device provided in this application embodiment can reduce the power loss caused by unnecessary heating of the power battery, thereby improving the driving range of the electric vehicle.

[0011] In a third possible implementation, in conjunction with any of the first to second possible embodiments of the first aspect, the heating device is used to obtain current battery demand information from a navigation device associated with the electric vehicle, or the heating device is used to obtain historical driving information from a navigation device associated with the electric vehicle. The navigation device or the heating device is used to calculate the current battery demand based on the historical driving information, which includes at least one of speed parameters, road condition parameters, distance parameters, duration parameters, acceleration parameters, or congestion parameters from the electric vehicle's historical journey.

[0012] In this embodiment, the heating device can directly obtain current battery demand information from the navigation device, thereby reducing the computing power requirements of the controller. The heating device can also obtain historical driving information from the navigation device and then quickly calculate the current battery demand based on this information, thus improving the applicability of the heating device. Furthermore, the heating device can continuously improve the accuracy of the current battery demand information based on the constantly accumulating historical driving information.

[0013] In conjunction with the third possible implementation of the first aspect, in the fourth possible implementation, the heating device outputs a preset power demand value in response to a comparison result of at least one of the distance parameter, duration parameter, or road condition parameter of the historical journey with its corresponding preset parameter value. The heating device also outputs a preset power demand value in response to a comparison result of at least one of the speed parameter, acceleration parameter, or congestion parameter of the historical journey with its corresponding preset parameter value.

[0014] In this embodiment, the heating device is used to calculate a preset power demand value or a preset energy demand value based on one or more parameters of the historical journey, thereby improving the accuracy of the current battery demand, reducing the power loss caused by unnecessary heating of the power battery, and thus improving the driving range of the electric vehicle. This also improves the applicability of the heating device to various scenarios.

[0015] In conjunction with the third possible implementation of the first aspect, in the fifth possible implementation, the preset power demand value includes a first preset power demand value and a second preset power demand value. The heating device is used to output the first preset power demand value in response to a speed parameter being greater than a preset speed parameter value. The heating device is also used to output the second preset power demand value in response to a speed parameter being less than or equal to a preset speed parameter value.

[0016] In this embodiment, the speed parameter is at least one of the following: maximum vehicle speed, average vehicle speed, maximum vehicle speed within a preset period, or average vehicle speed within a preset period.

[0017] In conjunction with the third possible implementation of the first aspect, in the sixth possible implementation, the preset power demand value includes a first preset power demand value and a second preset power demand value. The heating device is used to output the first preset power demand value in response to a distance parameter being greater than or equal to a preset distance parameter value. The heating device is also used to output the second preset power demand value in response to a distance parameter being less than a preset distance parameter value.

[0018] In this embodiment, the distance parameter is the longest single or round-trip distance, or the average distance of multiple trips within a preset period.

[0019] In this embodiment, the heating device can calculate the power demand or energy demand based on the comparison results of various parameters of the historical journey and their corresponding preset parameter values, thereby improving the accuracy of the current battery demand, reducing the energy loss caused by unnecessary power battery heating, and thus improving the driving range of electric vehicles. This also improves the applicability of the heating device to various scenarios.

[0020] Secondly, this application provides a controller for a heating device for a power battery in an electric vehicle. The electric vehicle includes an on-board charger, a battery management system, a power battery, and a heating device. The heating device includes a heater and a controller. The heater is used to heat the power battery. The controller includes a communication module, a temperature control module, and an identification module. The communication module is used to obtain the cell temperature of the power battery from the battery management system, the connection status of the power battery to an external power source from the on-board charger, and the remaining charge of the power battery from the battery management system. The temperature control module is used to control the heater to heat the power battery in response to the cell temperature falling below a preset temperature. The identification module is used to turn the temperature control module on or off based on the remaining charge of the power battery and the connection status of the power battery to the external power source.

[0021] The controller provided in this embodiment can turn the temperature control module of the heating device on or off according to the comparison results of the current battery demand information and the preset demand value, the comparison results of the remaining power capacity and the preset power capacity, and the connection status of the power battery and the external power source. Accordingly, when the temperature control module of the controller provided in this application embodiment is turned on, it can heat the power battery, thereby improving the drivability and driving experience of the electric vehicle. When the temperature control module of the controller is turned off, it can reduce the power loss caused by unnecessary heating of the power battery, thereby increasing the driving range of the electric vehicle and improving the applicability of the heating device to various scenarios.

[0022] In conjunction with the second aspect, in the first possible implementation, the identification module is used to activate the temperature control module in response to the remaining battery power being less than a preset battery power and the power battery not being connected to an external power source. Alternatively, the identification module can activate the temperature control module in response to the remaining battery power being greater than or equal to a preset battery power and the power battery being connected to an external power source. In this embodiment, the identification module can control the temperature control module to be activated or deactivated according to various scenarios. When the temperature control module is activated, it can heat the power battery, thereby improving the drivability and driving experience of the electric vehicle. When the temperature control module is deactivated, it can reduce unnecessary power loss caused by heating the power battery, thereby increasing the driving range of the electric vehicle and improving the applicability of the heating device to various scenarios.

[0023] Thirdly, this application provides a controller for a heating device for a power battery of an electric vehicle. The electric vehicle includes an on-board charger, a battery management system, a power battery, and a heating device. The heating device includes a heater and a controller. The heater is used to heat the power battery. The controller includes a communication module, a temperature control module, and an identification module. The communication module is used to obtain the connection status of the power battery to an external power source from the on-board charger or to obtain the remaining charge of the power battery from the battery management system. The temperature control module is used to obtain the cell temperature of the power battery from the battery management system and, in response to the cell temperature of the power battery being lower than a preset temperature, control the heater to heat the power battery. The identification module is used to obtain historical driving information or current battery demand information of the electric vehicle and to turn the temperature control module on or off based on at least one of the remaining charge, connection status, current battery demand information, or historical driving information.

[0024] The controller provided in this embodiment can turn the temperature control module of the heating device on or off according to at least one of the following: remaining power, connection status, current battery demand information, or historical driving information. Accordingly, the controller provided in this embodiment can not only heat the power battery to improve the drivability and driving experience of the electric vehicle, but also reduce unnecessary power loss caused by power battery heating to improve the driving range of the electric vehicle, thereby improving the applicability of the heating device to various scenarios.

[0025] In conjunction with the third aspect, in the first possible implementation, the identification module is configured to activate the temperature control module in response to a situation where the distance parameter or duration parameter in the historical driving information is less than the corresponding preset parameter value, the remaining battery power is greater than or equal to the preset battery power, and the power battery is connected to an external power source. Alternatively, the identification module can deactivate the temperature control module in response to a situation where the distance parameter or duration parameter in the historical driving information is greater than or equal to the corresponding preset parameter value, the remaining battery power is less than the preset battery power, and the power battery is not connected to an external power source.

[0026] In this embodiment, when the distance or duration parameters in the historical driving information are less than the corresponding preset parameter values, the electric vehicle's power demand is relatively low. The remaining power in the battery is substantial, which can be used to heat the battery, thereby improving the electric vehicle's driving performance. Furthermore, the battery is connected to an external power source, allowing for timely replenishment of its power loss. Accordingly, the identification module activates the temperature control module, further enhancing the electric vehicle's drivability and driving experience. Conversely, when the electric vehicle's power demand is high and the remaining battery power is low, it's necessary to reduce battery power loss. Since the battery is not connected to an external power source and cannot be charged, it's crucial to avoid heating the battery to prevent power loss. Accordingly, the identification module deactivates the temperature control module to prevent heating the battery, thereby saving power and increasing the electric vehicle's actual driving range.

[0027] In conjunction with the third aspect, in the second possible implementation, the identification module is configured to activate the temperature control module in response to a power demand value greater than or equal to a preset power demand value, a power demand value less than a preset power demand value, and remaining power greater than or equal to a preset power level. Conversely, the identification module is configured to deactivate the temperature control module in response to a power demand value less than a preset power demand value, a power demand value greater than or equal to a preset power demand value, and remaining power less than a preset power level.

[0028] In this embodiment, when the electric vehicle's power demand is high, the power battery needs to be heated to increase its rated power. When the electric vehicle's energy demand is less than a preset energy demand value, the next trip distance is shorter; when the remaining energy is greater than or equal to the preset energy demand value, the power battery has sufficient energy to meet the next trip demand. Accordingly, the identification module activates the temperature control module, thereby improving the drivability and driving experience of the electric vehicle. When the electric vehicle's power demand is low, the rated power requirement of the power battery is low. When the electric vehicle's energy demand is greater than the preset energy demand value, the next trip distance is longer; when the remaining energy is less than the preset energy demand value, the power battery has less energy. Therefore, it is necessary to avoid heating the power battery to save energy. Accordingly, the identification module deactivates the temperature control module, thereby improving the actual driving range of the electric vehicle.

[0029] In conjunction with the third aspect, in a third possible implementation, the identification module is used to turn the temperature control module on or off in response to a comparison result between a parameter in the historical driving information and its corresponding preset parameter value.

[0030] The controller provided in this embodiment can determine the power demand or energy demand of the electric vehicle based on a comparison between a parameter in historical driving information and its corresponding preset parameter value. Accordingly, when the identification module determines that the power demand of the electric vehicle is low based on a parameter in the historical driving information, it activates the temperature control module, thereby improving the drivability and driving experience of the electric vehicle. When the identification module determines that the energy demand of the electric vehicle is high based on a parameter in the historical driving information, it deactivates the temperature control module to avoid heating the power battery, thus saving energy and increasing the actual driving range of the electric vehicle.

[0031] Fourthly, this application provides an electric vehicle comprising a power battery, an on-board charging system, a battery management system, and a heating device provided in any of the first to sixth possible embodiments described above. Alternatively, the electric vehicle comprises a power battery, an on-board charging system, a battery management system, and a heating device. The heating device includes a heater and a controller provided in any of the second to third possible embodiments.

[0032] It is understood that the heating device for electric vehicles provided in this application embodiment can heat or not heat the power battery based on one or more factors such as current battery demand information, remaining power, and connection status between the power battery and the external power source, thereby taking into account both the driving range and driving performance of the electric vehicle in low-temperature environments. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of an electric vehicle;

[0034] Figure 2 This is a schematic diagram of an electric vehicle provided in an embodiment of this application;

[0035] Figure 3 This is another schematic diagram of the electric vehicle provided in the embodiments of this application;

[0036] Figure 4 This is another schematic diagram of the electric vehicle provided in the embodiments of this application. Detailed Implementation

[0037] The heating device and related equipment for power batteries in electric vehicles provided in this application will be described below with reference to the illustrations.

[0038] See Figure 1 , Figure 1 This is a schematic diagram of an electric vehicle. (For example...) Figure 1 As shown, the electric vehicle 1 includes a power battery 10 and a heating device 20. The heating device 20 is used to heat the power battery 10. The heating device 20 includes a heater 200 and a controller 201. The controller 201 is used to control the heater 200 to heat the power battery 10.

[0039] In low-temperature environments, the cell temperature of the power battery 10 in electric vehicle 1 decreases. Excessively low cell temperature leads to reduced performance of the power battery 10, thus affecting the driving performance of electric vehicle 1. In response to the low cell temperature of the power battery 10, controller 201 controls heater 200 to heat the power battery 10. Heating the power battery 10 by heater 200 gradually increases the cell temperature, thereby improving the performance of the power battery 10 and ultimately enhancing the driving performance of electric vehicle 1.

[0040] Although heating the power battery 10 with heater 200 can improve the performance of the power battery 10, heating the power battery 10 with heater 200 requires the power battery 10 to supply power, which reduces the remaining charge of the power battery 10 and consequently reduces the driving range of the electric vehicle 1.

[0041] Therefore, the heating of the battery cell temperature of the power battery 10 needs to take into account not only the driving performance of the electric vehicle 1, but also the driving range of the electric vehicle 1.

[0042] To address the above technical issues, this application provides a heating device and controller for a power battery of an electric vehicle, and an electric vehicle. The device can determine whether to heat the power battery 10 when the cell temperature of the power battery 10 is too low based on one or more of the following: historical driving information of the electric vehicle 1, current battery demand of the electric vehicle 1, remaining charge of the power battery 10, and connection status of the power battery 10 to an external power source. This balances the driving range and driving performance of the electric vehicle 1.

[0043] Figure 2 This is a schematic diagram of an electric vehicle provided in an embodiment of this application. For example... Figure 2 As shown, the electric vehicle 1 includes a power battery 10, a heating device 20, an on-board charger 30, and a battery management system 40. In this embodiment, the heating device 20 includes a heater 200 and a controller 201. In this embodiment, the controller 201 is connected to the heater 200. The controller 201 is used to control the heater 200 to heat the power battery 10.

[0044] In this embodiment, the heater 200 is used to receive power from the power battery 10 or the external power source 2 and generate heat to heat the power battery 10. In this embodiment, the external power source 2 includes at least one of a charging pile, an energy storage device, or an AC power grid.

[0045] In this embodiment, the heating device 20 may include one or more heat-generating or heat-conducting devices such as a drive motor, cooling system, charging device, or thermal circuit in the electric vehicle 1. In this embodiment, the heater 200 includes at least one of a positive temperature coefficient (PTC) heater or a drive motor. The PTC heater is used to transfer heat to the power battery 10 to heat the power battery 10. After receiving current, the drive motor can generate heat to heat the coolant of the drive motor, and the heat from the coolant is transferred to the power battery 10 through the thermal circuit to heat the power battery 10.

[0046] In this embodiment, the controller 201 includes a temperature control module 2011. The temperature control module 2011 of the controller 201 is used to control the heater 200 to heat the power battery 10 in response to the battery cell temperature being lower than a preset temperature. In this embodiment, the controller 201 or the heating device 20 can turn the temperature control module 2011 on or off.

[0047] For example, the heating device 20 or controller 201 activates the temperature control module 2011. When the cell temperature of the power battery 10 is lower than a preset temperature, the temperature control module 2011, in response to this, controls the heater 200 to heat the power battery 10, causing the cell temperature of the power battery 10 to gradually increase. Correspondingly, when the cell temperature of the power battery 10 rises above the preset temperature, the temperature control module 2011, in response to this, controls the heater 200 to stop heating the power battery 10.

[0048] For example, the heating device 20 or the controller 201 can shut down the temperature control module 2011. If the cell temperature of the power battery 10 is lower than the preset temperature, the temperature control module 2011 will not control the heater 200 to heat the power battery 10.

[0049] In this embodiment, the preset temperature is determined by the model of the power battery 10. For example, the preset temperature is greater than or equal to -20°C and less than or equal to 10°C. For example, the preset temperature can be 5°C.

[0050] In this embodiment, the controller 201 includes at least one of a vehicle controller (VCU), a domain controller (DCU), a motor controller (MCU), a control board, or a control chip. In one embodiment, the controller 201 is located inside or outside the electric vehicle 1. That is, the controller 201 can also be used to control other functional modules of the electric vehicle 1, such as the drive motor, cooling system, or charging device. In one embodiment, the controller 201 can also be located inside the heating device 20. In another embodiment, the controller 201 can also be located inside the heater 200.

[0051] In this embodiment, the on-board charger 30 is used to receive power from the external power source 2 and charge the power battery 10, and to provide the controller 201 with the connection status between the power battery 10 and the external power source 2. Correspondingly, the controller 201 is used to obtain the connection status between the power battery 10 and the external power source 2 from the on-board charger 30. In this embodiment, the connection status signal is used to indicate the connection status between the power battery 10 and the external power source 2. Specifically, the controller 201 is used to obtain the connection status between the power battery 10 and the external power source 2 based on the connection status signal output by the on-board charger 30.

[0052] For example, the on-board charger 30 includes a charging gun detection module. This module detects the connection status between the power battery 10 and the external power source 2 and outputs a connection status signal. The connection status signal includes at least one of a connection confirmation (CC) signal, a control pilot (CP) signal, a wake-up signal for the electric vehicle 1, or a charging gun signal provided by the controller 201. When the charging port of the electric vehicle 1 is plugged into the charging gun of the external power source 2, the charging gun detection module of the on-board charger 30 outputs a high-level signal. The controller 201 determines that the power battery 10 is connected to the external power source 2 in response to the high-level connection status signal. When the charging port of the electric vehicle 1 is not plugged into the charging gun of the external power source 2, the charging gun detection module of the on-board charger 30 outputs a low-level signal. The controller 201 determines that the power battery 10 is connected to the external power source 2 in response to the low-level connection status signal.

[0053] In this embodiment, the battery management system 40 is used to detect the battery parameters of the power battery 10. The battery parameters include at least one of cell temperature or remaining charge (SOC).

[0054] In one embodiment, the battery management system 40 provides the controller 201 with the cell temperature and remaining charge of the power battery 10. Correspondingly, the controller 201 obtains the cell temperature and remaining charge of the power battery 10 from the battery management system 40.

[0055] In one embodiment, the battery management system 40 provides the cell temperature of the power battery 10 to the temperature control module 2011. Correspondingly, the temperature control module 2011 obtains the cell temperature of the power battery 10 from the battery management system 40.

[0056] For example, the battery management system 40 includes a temperature detection module. The temperature detection module is used to detect the cell temperature of the power battery 10. In this embodiment, the temperature detection module includes at least one of a thermocouple, a positive temperature coefficient thermistor, a negative temperature coefficient thermistor, a silicon resistance temperature sensor, or an IC temperature sensor. The temperature detection module of the battery management system 40 outputs a cell temperature signal. This cell temperature signal indicates the cell temperature of the power battery 10. The controller 201 or the temperature control module 2011 is used to obtain the cell temperature of the power battery 10 based on the cell temperature signal.

[0057] For example, the battery management system 40 includes a power detection module. The power detection module is used to detect the remaining power of the power battery 10. The power detection module of the battery management system 40 outputs a remaining power signal. This remaining power signal indicates the remaining power of the power battery 10. The controller 201 is used to obtain the remaining power of the power battery 10 based on the remaining power signal.

[0058] In this embodiment, the heating device 20 is used to turn the temperature control module 2011 on or off based on at least one of the remaining charge of the power battery 10 and the connection status between the power battery 10 and the external power source 2. Correspondingly, the controller 201 of the heating device 20 is used to turn the temperature control module 2011 on or off based on at least one of the remaining charge of the power battery 10 and the connection status between the power battery 10 and the external power source 2. Correspondingly, the temperature control module 2011 of the controller 201 is used to turn the temperature control module 2011 on or off based on at least one of the remaining charge of the power battery 10 and the connection status between the power battery 10 and the external power source 2.

[0059] In one embodiment, the heating device 20 is used to turn the temperature control module 2011 on or off in response to a comparison between the remaining charge of the power battery 10 and a preset charge. For example, the preset charge can be 50%.

[0060] For example, the heating device 20 is configured to activate the temperature control module 2011 in response to the remaining charge of the power battery 10 being greater than or equal to a preset charge. It is understood that if the remaining charge of the power battery 10 is greater than or equal to the preset charge, then the power battery 10 has a relatively high remaining charge, and the heating device 20 activates the temperature control module 2011. Accordingly, the heater 200 can utilize the power supply of the power battery 10 to heat the power battery 10, thereby increasing the temperature of the power battery 10, thus improving the driving performance of the electric vehicle 1 with minimal impact on the driving range of the electric vehicle 1.

[0061] For example, the heating device 20 is configured to shut down the temperature control module 2011 in response to the remaining charge of the power battery 10 being less than a preset charge. It is understood that if the remaining charge of the power battery 10 is less than the preset charge, then the remaining charge of the power battery 10 is low, and the heating device 20 shuts down the temperature control module 2011. Accordingly, the heater 200 does not heat the power battery 10, thereby reducing the charge loss of the power battery 10 and thus avoiding impacting the driving range of the electric vehicle 1.

[0062] In one embodiment, the heating device 20 is used to turn the temperature control module 2011 on or off in response to the connection status of the power battery 10 and the external power source 2.

[0063] For example, the power battery 10 is connected to an external power source 2. The heating device 20 is used to activate the temperature control module 2011 in response to the connection of the power battery 10 to the external power source 2. It is understood that when the power battery 10 is connected to the external power source 2, the heater 200 can use the power supply of the power battery 10 to heat the power battery 10, thereby increasing the temperature of the power battery 10 and thus improving the driving performance of the electric vehicle 1. Furthermore, when the power battery 10's charge decreases, it can be recharged using the external power source 2, thereby avoiding impacting the driving range of the electric vehicle 1.

[0064] The power battery 10 is not connected to the external power source 2. In response to the disconnection of the power battery 10 from the external power source 2, the heating device 20 shuts down the temperature control module 2011. It is understood that when the power battery 10 is not connected to the external power source 2, heating the power battery 10 with the heater 200 would reduce its remaining charge and prevent it from being charged by the external power source 2. Shutting down the temperature control module 2011 by the heating device 20 can reduce the charge loss of the power battery 10, thereby avoiding impacting the driving range of the electric vehicle 1.

[0065] In one embodiment, the heating device 20 is used to turn the temperature control module 2011 on or off in response to a comparison between the remaining charge of the power battery 10 and a preset charge, as well as the connection status of the power battery 10 and the external power source 2. By turning the heating device 20 on or off the temperature control module 2011 in response to the comparison between the remaining charge of the power battery 10 and the preset charge, and the connection status of the power battery 10 and the external power source 2, both the driving performance and driving range of the electric vehicle 1 can be balanced.

[0066] For example, the remaining charge of the power battery 10 is greater than or equal to a preset charge, and the power battery 10 is connected to the external power source 2. In response to the remaining charge of the power battery 10 being greater than or equal to the preset charge and the power battery 10 being connected to the external power source 2, the heating device 20 activates the temperature control module 2011. It is understood that since the power battery 10 has a large remaining charge and can be charged at any time using the external power source 2, the heater 200 can use the power supply from the power battery 10 to heat the power battery 10, thereby increasing the temperature of the power battery 10 and thus improving the driving performance of the electric vehicle 1.

[0067] For example, when the remaining charge of the power battery 10 is less than a preset charge, the power battery 10 is connected to the external power source 2. In response to the power battery 10's remaining charge being less than the preset charge and the power battery 10 being connected to the external power source 2, the heating device 20 shuts down the temperature control module 2011. Correspondingly, the power battery 10 is connected to the external power source 2, and the external power source 2 charges the power battery 10, increasing its remaining charge. Subsequently, when the remaining charge of the power battery 10 increases to be greater than or equal to the preset charge, the heating device 20 turns on the temperature control module 2011.

[0068] Understandably, when the remaining charge of the power battery 10 is low and it can be charged using the external power source 2, direct heating of the power battery 10 by the heater 200 would further reduce its remaining charge. If the user needs to drive the electric vehicle 1 at this time, the driving range of the electric vehicle 1 will be reduced. Correspondingly, the heating device 20 shuts down the temperature control module 2011 to avoid heating the power battery 10 and reducing the driving range of the electric vehicle 1. As the power battery 10 is charged using the external power source 2, its remaining charge increases, and the heating device 20 activates the temperature control module 2011. The heater 200 then heats the power battery 10, improving its performance without affecting the driving range of the electric vehicle 1.

[0069] For example, the remaining charge of the power battery 10 is greater than or equal to a preset charge, and the power battery 10 is not connected to the external power source 2. In response to the remaining charge of the power battery 10 being greater than the preset charge and the power battery 10 being not connected to the external power source 2, the heating device 20 activates the temperature control module 2011. It can be understood that when the remaining charge of the power battery 10 is high, the heater 200 can utilize the power supply of the power battery 10 to heat the power battery 10, thereby increasing the temperature of the power battery 10, thus improving the driving performance of the electric vehicle 1 with minimal impact on the driving range of the electric vehicle 1.

[0070] For example, the remaining charge of the power battery 10 is less than a preset charge, and the power battery 10 is not connected to the external power source 2. In response to the power battery 10's remaining charge being less than the preset charge and the power battery 10 being unconnected to the external power source 2, the heating device 20 shuts down the temperature control module 2011. It is understood that when the remaining charge of the power battery 10 is low, heating the power battery 10 by the heater 200 would further reduce the driving range of the electric vehicle 1. Accordingly, the heating device 20 shuts down the temperature control module 2011, thereby increasing the driving range of the electric vehicle 1.

[0071] See Figure 3 , Figure 3 This is another schematic diagram of the electric vehicle provided in this application. For example... Figure 3 As shown above, Figure 2The electric vehicle 1 shown also includes a navigation device 50, the above Figure 2 The controller 201 shown also includes an identification module 2012.

[0072] In this embodiment, the navigation device 50 is associated with the electric vehicle 1. During the driving of the electric vehicle 1, the navigation device 50 continuously acquires the driving information of the electric vehicle 1. Before the controller 201 controls the heater 200 to heat the power battery 10, the navigation device 50 continuously acquires the driving information of the electric vehicle 1. The driving information acquired by the navigation device 50 relative to the controller 201 is historical driving information.

[0073] In this embodiment of the application, the historical driving information includes at least one of the following parameters from the historical driving information of one or more historical trips of the electric vehicle 1: speed parameters, road condition parameters, distance parameters, duration parameters, acceleration parameters, or congestion parameters.

[0074] In this embodiment, the navigation device 50 includes at least one of a vehicle infotainment system, a navigation system, a telecommunications-box (T-Box), a central control unit, or a terminal loaded with remote application software (APP). In one embodiment, the navigation device 50 is disposed inside the electric vehicle 1. That is, the electric vehicle 1 includes the navigation device 50. In another embodiment, the navigation device 50 may be disposed inside the controller 201. That is, the controller 201 includes the navigation device 50.

[0075] In one embodiment, the navigation device 50 is used to acquire and store historical driving information of the electric vehicle 1. Correspondingly, the controller 201 is used to acquire current battery demand information of the electric vehicle 1 based on the historical driving information of the electric vehicle 1. In another embodiment, the identification module 2012 of the controller 201 is used to acquire current battery demand information of the electric vehicle 1 based on the historical driving information of the electric vehicle 1 received from the navigation device 50.

[0076] In one embodiment, the navigation device 50 is used to provide the controller 201 with the current battery demand information of the electric vehicle 1 based on the historical driving information of the electric vehicle 1. Correspondingly, the controller 201 is used to obtain the current battery demand information of the electric vehicle 1 from the navigation device 50. In another embodiment, the identification module 2012 of the controller 201 is used to obtain the current battery demand information of the electric vehicle 1 from the navigation device 50.

[0077] In this embodiment of the application, the current battery demand information includes at least one of a power demand value or a battery charge demand value. In this embodiment of the application, the power demand value includes a first power demand value and a second power demand value, and the power demand value includes a first power demand value and a second power demand value.

[0078] In this embodiment, the preset demand value includes a preset energy demand value and a preset power demand value. The preset demand value can be a parameter set by the driver or a parameter stored or configured in the controller 201. In one embodiment, the preset energy demand value or the preset power demand value can be a parameter set by the driver, a factory configuration parameter of the power battery 10, or a parameter stored or configured in the controller 201.

[0079] In one embodiment, the controller 201 or navigation device 50 is configured to output a power demand value based on a comparison result of at least one of the distance parameter, duration parameter, or road condition parameter of a historical trip with its corresponding preset parameter value. In another embodiment, the controller 201 or navigation device 50 is configured to output a power demand value based on a comparison result of at least one of the distance parameter, duration parameter, or road condition parameter of a historical trip with its corresponding preset parameter value.

[0080] In one embodiment, the controller 201 or navigation device 50 is configured to output a power demand value based on a comparison result of at least one of the speed parameters, acceleration parameters, or congestion parameters of the historical journey with their corresponding preset parameter values. In another embodiment, the controller 201 or navigation device 50 is configured to output a power demand value based on a comparison result of at least one of the speed parameters, acceleration parameters, or congestion parameters of the historical journey with their corresponding preset parameter values.

[0081] In this embodiment, the preset parameter values ​​can be parameters set by the driver, factory configuration parameters of the controller 201 or navigation device 50, or parameters stored in the internal memory. The preset parameter values ​​include at least one of preset distance parameter values, preset duration parameter values, preset acceleration parameter values, preset road condition parameter values, or preset congestion parameter values.

[0082] For example, the speed parameter includes at least one of the following: maximum vehicle speed, average vehicle speed, maximum vehicle speed within a preset period, or average vehicle speed within a preset period. It is understood that the higher the speed of the electric vehicle 1, the greater the rated power required by the power battery 10. Therefore, the speed parameter can be used to represent the maximum rated power of the power battery 10 required by the electric vehicle 1 during one or more historical trips. Accordingly, based on the speed parameter in the historical driving information, the power demand of the electric vehicle 1 on the battery during the next or future trips can be determined.

[0083] For example, in response to a speed parameter in historical driving information being greater than a preset speed parameter value, controller 201 or navigation device 50 outputs a first power demand value. In response to a speed parameter in historical driving information being less than or equal to the preset speed parameter value, controller 201 or navigation device 50 outputs a second power demand value.

[0084] For example, acceleration parameters include at least one of acceleration, number of accelerations, maximum acceleration within a preset period, or average acceleration within a preset period. It is understood that the faster the electric vehicle 1 accelerates or the more times it accelerates, the greater the instantaneous power required by the power battery 10. Therefore, acceleration parameters can be used to represent the maximum instantaneous power required by the power battery 10 during one or more historical trips of the electric vehicle 1. Accordingly, the power demand of the electric vehicle 1 on the battery for the next or future trips can be obtained based on the acceleration parameters in the historical driving information.

[0085] For example, if the acceleration parameter in the historical driving information is greater than a preset acceleration parameter value, the controller 201 or the navigation device 50 outputs a first power demand value. If the acceleration parameter in the historical driving information is less than or equal to the preset acceleration parameter value, the controller 201 or the navigation device 50 outputs a second power demand value.

[0086] For example, congestion parameters include at least one of congestion, free flow, congestion conditions of multiple trips within a preset period, or average congestion conditions of multiple trips within a preset period. It is understood that higher congestion levels result in lower average speeds for the electric vehicle 1 but also greater battery power consumption. Therefore, congestion parameters can be used to represent the greater rated power and / or greater battery capacity required by the power battery 10 for one or more historical trips of the electric vehicle 1. Accordingly, based on the congestion parameters in historical driving information, the battery power demand and / or battery power demand of the electric vehicle 1 for the next or future trips can be obtained.

[0087] For example, if the congestion parameter in the historical driving information is greater than a preset congestion parameter value, the controller 201 or the navigation device 50 outputs at least one of a first power demand value or a first battery demand value. If the congestion parameter in the historical driving information is less than or equal to the preset congestion parameter value, the controller 201 or the navigation device 50 outputs at least one of a second power demand value or a second battery demand value.

[0088] For example, the distance parameter includes at least one of the longest single or round-trip distance, or the average distance of multiple trips within a preset period. It is understood that the longer the driving distance of the electric vehicle 1, the greater the amount of power required by the battery 10. Therefore, the distance parameter can be used to represent the maximum amount of power required by the battery 10 during one or more historical trips of the electric vehicle 1. Accordingly, the battery power requirement of the electric vehicle 1 for the next or future trips can be obtained based on the distance parameter in the historical driving information.

[0089] For example, if the distance parameter in the historical driving information is greater than or equal to a preset distance parameter value, the controller 201 or the navigation device 50 outputs a first power requirement value. If the distance parameter in the historical driving information is less than the preset distance parameter value, the controller 201 or the navigation device 50 outputs a second power requirement value.

[0090] For example, the duration parameter includes at least one of the longest single or round-trip trip duration, or the average duration of multiple trips within a preset period. It is understood that the longer the driving time of electric vehicle 1, the greater the amount of power required by the power battery 10. Therefore, the duration parameter can be used to represent the maximum amount of power required by the power battery 10 during one or more historical trips of electric vehicle 1. Accordingly, the power demand of electric vehicle 1 on the battery for the next or future trips can be obtained based on the duration parameter in the historical driving information.

[0091] For example, if the duration parameter in the historical driving information is greater than or equal to a preset duration parameter value, the controller 201 or the navigation device 50 outputs a first power requirement value. If the duration parameter in the historical driving information is less than the preset duration parameter value, the controller 201 or the navigation device 50 outputs a second power requirement value.

[0092] For example, road condition parameters include at least one of the following: snow, off-road, highway, urban, or common road conditions from multiple trips within a preset period, or the average road conditions from multiple trips within a preset period. It is understood that the more complex the road conditions, the greater the rated power and capacity required by the power battery 10. Therefore, road condition parameters can be used to represent the maximum rated power and capacity of the power battery 10 required for one or more historical trips of the electric vehicle 1.

[0093] Accordingly, based on road condition parameters in historical driving information, the battery charge demand and battery power demand of electric vehicle 1 for the next or multiple future trips can be obtained. For example, if the road condition parameters in the historical driving information are greater than a preset road condition parameter value, the controller 201 or navigation device 50 outputs at least one of a first power demand value or a first charge demand value. If the road condition parameters in the historical driving information are less than or equal to the preset road condition parameter value, the controller 201 or navigation device 50 outputs at least one of a second power demand value or a second charge demand value.

[0094] In this embodiment, the heating device 20 can turn the temperature control module 2011 on or off based on a comparison between the current battery demand and a preset demand value. Correspondingly, the controller 201 of the heating device 20 turns the temperature control module 2011 on or off based on a comparison between the current battery demand and the preset demand value. The identification module 2012 of the controller 201 turns the temperature control module 2011 on or off based on a comparison between the current battery demand and the preset demand value.

[0095] For example, the heating device 20 is configured to turn off the temperature control module 2011 in response to a current battery demand information value that is greater than or equal to a preset battery demand value. The heating device 20 is also configured to turn on the temperature control module 2011 in response to a current battery demand information value that is less than the preset battery demand value.

[0096] It is understandable that when the current battery demand information shows a higher power demand value, the driving range of the electric vehicle 1 on its next trip will be longer. Therefore, it is necessary to avoid further reduction of the remaining power of the power battery 10 due to heating, thereby avoiding affecting the driving range of the electric vehicle 1 on its next trip.

[0097] For example, the heating device 20 is configured to activate the temperature control module 2011 in response to a power demand value in the current battery demand information being greater than or equal to a preset power demand value. The heating device 20 is also configured to deactivate the temperature control module 2011 in response to a power demand value in the current battery demand information being less than the preset power demand value.

[0098] Understandably, when the power demand value in the current battery demand information is large, it is necessary to increase the rated power or instantaneous power of the power battery 10. Therefore, the heating device 20 activates the temperature control module 2011, and the power battery 10 can be heated when the cell temperature of the power battery 10 is lower than the preset temperature, thereby improving the driving performance of the electric vehicle 1.

[0099] In this embodiment, the heating device 20 is used to turn the temperature control module 2011 on or off based on a comparison result between at least one parameter in the historical driving information and its corresponding preset parameter value. Correspondingly, the controller 201 of the heating device 20 is used to turn the temperature control module 2011 on or off based on a comparison result between at least one parameter in the historical driving information and its corresponding preset parameter value. The identification module 2012 of the controller 201 is used to turn the temperature control module 2011 on or off based on a comparison result between at least one parameter in the historical driving information and its corresponding preset parameter value.

[0100] For example, the heating device 20 is configured to turn off the temperature control module 2011 in response to a distance parameter greater than or equal to a preset distance parameter value or a duration parameter greater than or equal to a preset duration parameter value in historical driving information. The heating device 20 is also configured to turn on the temperature control module 2011 in response to a distance parameter less than a preset distance parameter value or a duration parameter less than a preset duration parameter value in historical driving information.

[0101] Understandably, if the distance parameter or duration parameter in the historical driving information is greater than or equal to a preset distance parameter value or a preset duration parameter value, the electric vehicle 1 will require a significant amount of power from the power battery 10 for its next or future trips. Therefore, to avoid affecting the driving range of the electric vehicle 1 for its next trip, it is necessary to reduce the power loss of the power battery 10. Accordingly, the heating device 20 shuts down the temperature control module 2011, preventing the power battery 10 from heating when its cell temperature is below a preset temperature, thereby avoiding further loss of the remaining power of the power battery 10 and thus preventing any impact on the driving range and driving experience of the electric vehicle 1 for its next trip.

[0102] For example, the heating device 20 is configured to activate the temperature control module 2011 in response to a speed parameter greater than or equal to a preset speed parameter value or an acceleration parameter greater than or equal to a preset acceleration parameter value in historical driving information. The heating device 20 is configured to deactivate the temperature control module 2011 in response to a speed parameter less than a preset speed parameter value or an acceleration parameter less than a preset acceleration parameter value in historical driving information.

[0103] Understandably, if the speed parameter or acceleration parameter in the historical driving information is greater than or equal to a preset speed parameter value or a preset acceleration parameter value, the electric vehicle 1 will require the power battery 10 to provide greater power in its next or future trips. Therefore, to improve the driving performance of the electric vehicle 1 in its next trip, the power battery 10 needs to be heated to increase its rated power or instantaneous power. Accordingly, the heating device 20 activates the temperature control module 2011 to heat the power battery 10, thereby improving its performance and ultimately enhancing the driving performance of the electric vehicle 1.

[0104] For example, the heating device 20 is configured to activate the temperature control module 2011 in response to a road condition parameter or congestion parameter in historical driving information being greater than or equal to a preset road condition parameter value or a preset congestion parameter value. The heating device 20 is also configured to deactivate the temperature control module 2011 in response to a road condition parameter or congestion parameter in historical driving information being less than a preset road condition parameter value or a preset congestion parameter value.

[0105] It is understandable that if the road condition parameters or congestion parameters in the historical driving information are greater than or equal to the preset road condition parameter values ​​or the preset congestion parameter values, the electric vehicle 1 will require the power battery 10 to provide greater power or more electricity in its next or future trips. Therefore, in order to balance the driving performance and range of the electric vehicle 1 in its next trip, the heating device 20 can turn the temperature control module 2011 on or off accordingly.

[0106] See Figure 4 , Figure 4 This is another schematic diagram of the electric vehicle provided in this application. For example... Figure 4 As shown above, Figure 3 The controller 201 in the electric vehicle 1 shown includes a communication module 2010, a temperature control module 2011, and an identification module 2012.

[0107] In this embodiment, the communication module 2010 of the controller 201 is used to connect to the on-board charger 30 and the battery management system 40, respectively. The communication module 2010 of the controller 201 is used to obtain the connection status of the power battery 10 and the external power source 2 from the on-board charger 30, and to obtain the cell temperature and remaining power of the power battery 10 from the battery management system 40.

[0108] In this embodiment, the communication module 2010 of the controller 201 is further used to connect to the navigation device 50. In one embodiment, the communication module 2010 of the controller 201 is used to obtain historical driving information from the navigation device 50. The identification module 2012 of the controller 201 is used to obtain the current battery requirement based on the historical driving information. In another embodiment, the communication module 2010 of the controller 201 is used to obtain the current battery requirement from the navigation device 50.

[0109] In this embodiment, the communication module 2010 of the controller 201 may include any one of one or more ports. Furthermore, one port of the communication module 2010 may simultaneously have both communication and output functions. In this embodiment, the communication module 2010 and the battery management system 40, temperature control module 2011, identification module 2012, or other components are only distinguished by function, and are not limited to specific connection relationships or hardware modules.

[0110] In this embodiment, the temperature control module 2011 of the controller 201 is used to control the heater 200 to heat the power battery 10 in response to the cell temperature of the power battery 10 being lower than a preset temperature. In this embodiment, the temperature control module 2011 of the controller 201 can be turned on or off.

[0111] For example, the temperature control module 2011 of the controller 201 is activated. When the cell temperature of the power battery 10 is lower than a preset temperature, the temperature control module 2011, in response to this, controls the heater 200 to heat the power battery 10, causing the cell temperature of the power battery 10 to gradually increase. Correspondingly, when the cell temperature of the power battery 10 rises above the preset temperature, the temperature control module 2011, in response to this, controls the heater 200 to stop heating the power battery 10.

[0112] For example, the temperature control module 2011 of the controller 201 is turned off. When the cell temperature of the power battery 10 is lower than the preset temperature, the temperature control module 2011 will not control the heater 200 to heat the power battery 10.

[0113] In this embodiment, the heating device 20 is used to turn the temperature control module 2011 on or off based on one or more of the following: the remaining charge of the power battery 10, the connection status of the power battery 10 to the external power source 2, the historical driving information of the electric vehicle 1, or the current battery demand of the electric vehicle 1. Correspondingly, the controller 201 is used to turn the temperature control module 2011 on or off based on one or more of the following: the remaining charge of the power battery 10, the connection status of the power battery 10 to the external power source 2, the historical driving information of the electric vehicle 1, or the current battery demand of the electric vehicle 1. Correspondingly, the identification module 2012 is used to turn the temperature control module 2011 on or off based on one or more of the following: the remaining charge of the power battery 10, the connection status of the power battery 10 to the external power source 2, the historical driving information of the electric vehicle 1, or the current battery demand of the electric vehicle 1.

[0114] In this embodiment, the heating device 20, controller 201, or identification module 2012 is used to turn the temperature control module 2011 on or off in response to at least one of the following: a comparison result of at least one parameter in the historical driving information of the electric vehicle 1 with a preset parameter value, a comparison result of the current battery demand information of the electric vehicle 1 with a preset demand value, a comparison result of the remaining power of the power battery 10 with a preset power, or the connection status of the power battery 10 and the external power source 2.

[0115] In one embodiment, the heating device 20, the controller 201, or the identification module 2012 is used to turn the temperature control module 2011 on or off based on the historical driving information of the electric vehicle 1, the remaining power of the power battery 10, and the connection status of the power battery 10 with the external power source 2.

[0116] For example, the heating device 20 is used to activate the temperature control module 2011 in response to the following: the distance parameter or duration parameter in the historical driving information of the electric vehicle 1 is less than the corresponding preset parameter value, the remaining power of the power battery 10 is less than or equal to the preset power, and the power battery 10 is connected to the external power source 2.

[0117] Understandably, if the distance parameter in the historical driving information of electric vehicle 1 is less than the preset distance parameter or the duration parameter is less than the corresponding preset duration parameter, the next trip or future trips of electric vehicle 1 will require less power from the power battery 10. The remaining power of the power battery 10 is greater than or equal to the preset power, meaning there is sufficient remaining power to power the heating device 20. The power battery 10 is connected to an external power source 2, allowing it to be charged. Correspondingly, the heating device 20 activates the temperature control module 2011. When the cell temperature of the power battery 10 is lower than the preset temperature, the heating device 20 heats the power battery 10, raising its temperature and thus improving the driving performance of electric vehicle 1. Furthermore, the fact that the power battery 10 can be charged using the external power source 2 does not reduce the driving range of electric vehicle 1.

[0118] For example, the heating device 20 is used to turn off the temperature control module 2011 in response to the following: the distance parameter or duration parameter in the historical driving information of the electric vehicle 1 is greater than or equal to the corresponding preset parameter value, the remaining power of the power battery 10 is less than the preset power, and the power battery 10 is not connected to the external power source 2.

[0119] Understandably, if the distance parameter or duration parameter in the historical driving information of electric vehicle 1 is greater than or equal to the preset distance parameter or the corresponding preset duration parameter, the next trip or multiple future trips of electric vehicle 1 will require more power from the power battery 10. If the remaining power of the power battery 10 is less than the preset power, then the power battery 10 needs to reduce power loss. If the power battery 10 is not connected to the external power source 2, the power battery 10 cannot be charged by the external power source 2. Accordingly, the heating device 20 shuts down the temperature control module 2011. When the cell temperature of the power battery 10 is lower than the preset temperature, the heating device 20 does not heat the power battery 10, thereby reducing power loss and increasing the driving range of electric vehicle 1.

[0120] For example, the heating device 20 is used to turn off the temperature control module 2011 in response to the following: the distance parameter or duration parameter in the historical driving information of the electric vehicle 1 is greater than or equal to the corresponding preset parameter value, the remaining power of the power battery 10 is less than the preset power, and the power battery 10 is connected to the external power source 2.

[0121] Understandably, if the distance parameter in the historical driving information of electric vehicle 1 is greater than or equal to the preset distance parameter or the duration parameter is greater than or equal to the corresponding preset duration parameter, the next trip or future trips of electric vehicle 1 will require more power from the power battery 10. If the remaining power of power battery 10 is less than the preset power, the power battery 10 needs to reduce power loss. Accordingly, the heating device 20 shuts down the temperature control module 2011. When the cell temperature of power battery 10 is lower than the preset temperature, the heating device 20 does not heat power battery 10, thereby reducing power loss and allowing the user to conveniently start the next trip of electric vehicle 1 at any time. Additionally, power battery 10 is connected to external power source 2, and power battery 10 can be charged using external power source 2, causing the remaining power of power battery 10 to gradually increase with charging. Accordingly, when the remaining power of power battery 10 gradually increases to greater than or equal to the preset power, the heating device 20 activates the temperature control module 2011. At this time, the heating device 20 heats the power battery 10 again, which can improve the driving performance of the electric vehicle 1 in the next trip without affecting the driving range of the electric vehicle 1.

[0122] Correspondingly, the heating device 20 turns the temperature control module 2011 on or off according to the historical driving information of the electric vehicle 1, the remaining power of the power battery 10 and the connection status of the power battery 10 with the external power source 2, so as to take into account both the driving range and driving performance of the electric vehicle 1.

[0123] In one embodiment, the heating device 20, the controller 201, or the identification module 2012 is used to turn the temperature control module 2011 on or off based on historical driving information and the connection status between the power battery 10 and the external power source 2.

[0124] For example, the heating device 20 is used to activate the temperature control module 2011 in response to the fact that the distance parameter in the historical driving information of the electric vehicle 1 is greater than or equal to a preset distance parameter value or the duration parameter is greater than or equal to the corresponding preset duration parameter, and the power battery 10 is connected to the external power source 2.

[0125] Understandably, if the distance parameter or duration parameter in the historical driving information of electric vehicle 1 is greater than or equal to a preset distance parameter or a corresponding preset duration parameter, the next trip or multiple future trips of electric vehicle 1 will require a significant amount of power from the power battery 10. The power battery 10 is connected to an external power source 2, allowing it to be charged. Correspondingly, the heating device 20 activates the temperature control module 2011. When the cell temperature of the power battery 10 is lower than a preset temperature, the heating device 20 heats the power battery 10, raising its temperature and thus improving the driving performance of electric vehicle 1. Furthermore, the fact that the power battery 10 can be charged using the external power source 2 does not reduce the driving range of electric vehicle 1.

[0126] For example, the heating device 20 is used to activate the temperature control module 2011 in response to the fact that the distance parameter in the historical driving information of the electric vehicle 1 is greater than or equal to a preset distance parameter value or the duration parameter is greater than or equal to the corresponding preset duration parameter, and the power battery 10 is not connected to the external power source 2.

[0127] Understandably, if the distance parameter in the historical driving information of electric vehicle 1 is greater than or equal to a preset distance parameter or the duration parameter is greater than or equal to a corresponding preset duration parameter, the next trip or multiple future trips of electric vehicle 1 will require a significant amount of power from the power battery 10. Since the power battery 10 is not connected to the external power source 2, it cannot be charged using the external power source 2. Accordingly, the heating device 20 shuts down the temperature control module 2011. When the cell temperature of the power battery 10 is lower than the preset temperature, the heating device 20 does not heat the power battery 10 to avoid power loss and thus prevent a reduction in the driving range of electric vehicle 1.

[0128] For example, the heating device 20 is used to shut down the temperature control module 2011 in response to the fact that the speed parameter or acceleration parameter in the historical driving information of the electric vehicle 1 is less than or equal to a preset speed parameter value or is less than or equal to a preset acceleration parameter value, and the power battery 10 is not connected to the external power source 2.

[0129] Understandably, if the speed parameter or acceleration parameter in the historical driving information of electric vehicle 1 is less than or equal to the preset speed parameter value or the preset acceleration parameter value, the power demand of electric vehicle 1 on the next trip or multiple future trips will be relatively small, and not heating the power battery 10 will not affect the driving experience of electric vehicle 1. Since the power battery 10 is not connected to the external power source 2, the power battery 10 cannot be charged by the external power source 2. Accordingly, the heating device 20 shuts down the temperature control module 2011. When the cell temperature of the power battery 10 is lower than the preset temperature, the heating device 20 does not heat the power battery 10 to avoid power loss, thereby avoiding affecting the driving range of electric vehicle 1 and not affecting the driving experience of electric vehicle 1.

[0130] For example, the heating device 20 is used to activate the temperature control module 2011 in response to the acceleration parameter or speed parameter in the historical driving information of the electric vehicle 1 being greater than or equal to the corresponding preset parameter value and the power battery 10 being connected to the external power source 2.

[0131] Understandably, if the acceleration parameter or speed parameter in the historical driving information of electric vehicle 1 is greater than or equal to the preset acceleration parameter or the corresponding preset speed parameter, the power demand of electric vehicle 1 on its next or future trips will be greater than that of the power battery 10. The power battery 10 is connected to an external power source 2, and can be charged using the external power source 2. Correspondingly, the heating device 20 activates the temperature control module 2011. When the cell temperature of the power battery 10 is lower than the preset temperature, the heating device 20 heats the power battery 10, raising its temperature and thus improving the driving performance of electric vehicle 1. Furthermore, the fact that the power battery 10 can be charged using the external power source 2 does not reduce the driving range of electric vehicle 1.

[0132] In one embodiment, the heating device 20, the controller 201, or the identification module 2012 is used to turn the temperature control module 2011 on or off according to the current battery demand information of the electric vehicle 1 and the connection status of the power battery 10 and the external power source 2.

[0133] For example, the heating device 20 is used to activate the temperature control module 2011 in response to the current battery demand information of the electric vehicle 1 having a power demand value greater than or equal to a preset power demand value and the power battery 10 being connected to the external power source 2.

[0134] Understandably, if the power demand value in the current battery demand information of electric vehicle 1 is greater than or equal to the preset power demand value, the cell temperature of power battery 10 needs to be increased. Power battery 10 is connected to external power source 2, and power battery 10 can be charged using external power source 2. Correspondingly, heating device 20 activates temperature control module 2011. When the cell temperature of power battery 10 is lower than the preset temperature, heating device 20 heats power battery 10, raising its temperature and thus improving the driving performance of electric vehicle 1. Moreover, power battery 10 can be charged using external power source 2 without reducing the driving range of electric vehicle 1.

[0135] For example, the heating device 20 is used to turn off the temperature control module 2011 in response to the current battery demand information of the electric vehicle 1 having a power demand value greater than or equal to a preset power demand value and the power battery 10 not being connected to the external power source 2.

[0136] Understandably, if the current battery demand information of electric vehicle 1 shows a power demand value greater than or equal to a preset power demand value, the remaining power of the power battery 10 needs to be reduced. Since the power battery 10 is not connected to the external power source 2, it cannot be charged using the external power source 2. Accordingly, the heating device 20 shuts down the temperature control module 2011. When the cell temperature of the power battery 10 is lower than the preset temperature, the heating device 20 does not heat the power battery 10, thus reducing power battery losses and improving the driving range of electric vehicle 1.

[0137] In one embodiment, the heating device 20, the controller 201, or the identification module 2012 is used to turn the temperature control module 2011 on or off based on the current battery demand information of the electric vehicle 1, including the power demand value and the energy demand value, and the remaining power of the power battery 10.

[0138] For example, the heating device 20 is used to activate the temperature control module 2011 in response to the current battery demand information where the power demand value is greater than or equal to the preset power demand value and the energy demand value is less than the preset energy demand value, and the remaining energy of the power battery 10 is greater than the preset energy.

[0139] It is understandable that in the current battery demand information of electric vehicle 1, the power demand value is greater than or equal to the preset power demand value, while the energy demand value is less than the preset energy demand value. The next trip or future trips of electric vehicle 1 will require a larger power but a smaller energy supply from the power battery 10. The remaining energy of the power battery 10 is greater than the preset energy, indicating a significant remaining energy level. Accordingly, the heating device 20 activates the temperature control module 2011. When the cell temperature of the power battery 10 is lower than the preset temperature, the heating device 20 heats the power battery 10, thereby improving the driving experience of electric vehicle 1. Furthermore, since the energy demand of the power battery 10 for the next trip or future trips of electric vehicle 1 is low, the energy loss caused by heating the power battery 10 will not affect the driving range of electric vehicle 1 for the next trip or future trips.

[0140] For example, the heating device 20 is used to turn off the temperature control module 2011 in response to the current battery demand information of the electric vehicle 1, where the power demand value is less than the preset power demand value, the energy demand value is greater than or equal to the preset energy demand value, and the remaining energy of the power battery 10 is less than the preset energy.

[0141] Understandably, if the power demand of electric vehicle 1 is less than the preset power demand, the power demand of electric vehicle 1 on its next or future trips will be relatively low. If the energy demand of electric vehicle 1 is greater than or equal to the preset energy demand, the energy demand of electric vehicle 1 on its next or future trips will be relatively low. If the remaining energy of power battery 10 is less than the preset energy, the remaining energy of power battery 10 needs to be reduced to meet the needs of electric vehicle 1's next trip. Accordingly, heating device 20 shuts down temperature control module 2011. When the cell temperature of power battery 10 is lower than the preset temperature, heating device 20 does not heat power battery 10 to avoid energy loss, thereby improving the driving range of electric vehicle 1 without affecting the driving experience of electric vehicle 1's next trip.

[0142] In this embodiment, the controller 201 is further configured to acquire a heating command from the driver. This heating command is used to control the heating device 20 to heat the power battery 10. For example, the navigation device 50 is a vehicle infotainment system, and the user interface can be the vehicle infotainment system's display screen. The user can input the heating command through the display screen of the navigation device 50. The controller 201 is configured to, in response to the heating command, cause the heating device 20 to heat the power battery 10.

[0143] The heating device 20 and its controller 201, and the electric vehicle 1 provided in this application embodiment can determine whether to heat the power battery 10 when the cell temperature of the power battery 10 is too low based on at least one of the following: the historical driving information of the electric vehicle 1, the current battery demand of the electric vehicle 1, the remaining power of the power battery 10, and the connection status of the power battery 10 with the external power source 2. This reduces the loss of the remaining power of the power battery 10 due to heating, thereby balancing the driving range and driving performance of the electric vehicle 1.

[0144] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A heating device for a power battery of an electric vehicle, characterized in that, The electric vehicle includes an on-board charger, a battery management system, a power battery, and the heating device. The heating device includes a temperature control module and a heater. The temperature control module controls the heater to heat the power battery in response to the battery cell temperature being lower than a preset temperature. The heating device is used for: Obtain the current battery demand information of the electric vehicle, wherein the current battery demand information includes at least one of a power demand value or a battery demand value; The connection status of the power battery to the external power source is obtained from the on-board charger. The remaining power of the power battery is obtained from the battery management system; The temperature control module is turned on or off based on the current battery demand information, the remaining power, and the connection status.

2. The heating device according to claim 1, characterized in that, The heating device is used for: The temperature control module is turned on or off in response to the comparison results of the current battery demand information and the preset demand value, the comparison results of the remaining power capacity and the preset power capacity, and the connection status of the power battery and the external power source.

3. The heating device according to claim 2, characterized in that, The preset demand value includes at least one of a preset electricity demand value or a preset power demand value, and the heating device is used for: In response to the current battery demand information having a power demand value greater than or equal to a preset power demand value, and the remaining power being greater than or equal to a preset power, and the power battery being connected to the external power source, the temperature control module is activated; In response to the current battery demand information showing that the power demand value is less than the preset power demand value, the remaining power is less than or equal to the preset power, and the power battery is not connected to the external power source, the temperature control module is turned off.

4. The heating device according to claim 3, characterized in that, The heating device is used to obtain the current battery demand information from the navigation device associated with the electric vehicle, or the heating device is used to obtain the current battery demand information based on historical driving information received from the navigation device associated with the electric vehicle. The historical driving information includes at least one of the following: speed parameters, road condition parameters, distance parameters, duration parameters, acceleration parameters, or congestion parameters of one or more trips of the electric vehicle.

5. The heating device according to claim 4, characterized in that, The heating device is used for: In response to the comparison result of at least one of the distance parameter, duration parameter or road condition parameter in the historical driving information and its corresponding preset parameter value, the preset power demand value is output. In response to the comparison result of at least one of the speed parameter, acceleration parameter, or congestion parameter in the historical driving information with its corresponding preset parameter value, the preset power demand value is output.

6. The heating device according to claim 5, characterized in that, The preset power requirement value includes a first preset power requirement value and a second preset power requirement value, and the heating device is used for: In response to at least one of the speed parameter or acceleration parameter being greater than the corresponding preset parameter value, the first preset power demand value is output; In response to at least one of the speed parameters or acceleration parameters being less than or equal to the corresponding preset parameter value, the second preset power demand value is output.

7. The heating device according to claim 5, characterized in that, The preset power demand value includes a first preset power demand value and a second preset power demand value, and the heating device is used for: In response to at least one of the distance parameter or the duration parameter being greater than or equal to the corresponding preset parameter value, the first preset power demand value is output; In response to at least one of the distance parameter or the duration parameter being less than the corresponding preset parameter value, the second preset power demand value is output.

8. A controller for a power battery heating device for electric vehicles, characterized in that, The electric vehicle includes an on-board charger, a battery management system, the power battery, and the heating device. The heating device includes a heater and a controller. The heater is used to heat the power battery, and the controller includes: The communication module is used to obtain the current battery demand information of the electric vehicle, receive the cell temperature of the power battery from the battery management system, receive the connection status of the power battery with the external power source from the on-board charger, and receive the remaining power of the power battery from the battery management system. The temperature control module is used to control the heater to heat the power battery in response to the cell temperature being lower than a preset temperature; The identification module is used to turn the temperature control module on or off based on the current battery demand information, the remaining power, and the connection status.

9. The controller according to claim 8, characterized in that, The current battery demand information includes at least one of a power demand value or a battery capacity demand value, and the identification module is used for: In response to the current battery demand information showing that the power demand value is less than the preset power demand value, the remaining power is less than the preset power, and the power battery is not connected to the external power source, the temperature control module is turned off. In response to the current battery demand information having a power demand value greater than or equal to a preset power demand value, and the remaining power being greater than or equal to the preset power, and the power battery being connected to the external power source, the temperature control module is activated.

10. The controller according to any one of claims 8-9, characterized in that, The identification module is used for: Receive historical driving information of the electric vehicle from the navigation device associated with the electric vehicle, and obtain the current battery demand information of the electric vehicle based on the historical driving information; The temperature control module is turned on or off based on the current battery demand information, the remaining power, and the connection status.

11. A controller for a power battery heating device for electric vehicles, characterized in that, The electric vehicle includes an on-board charger, a battery management system, the power battery, and the heating device. The heating device includes a heater and a controller. The heater is used to heat the power battery, and the controller includes: A communication module is used to receive at least one of the following: the connection status of the power battery with an external power source from the on-board charger or the remaining power of the power battery from the battery management system. A temperature control module is used to receive the cell temperature of the power battery from the battery management system, and control the heater to heat the power battery in response to the cell temperature of the power battery being lower than a preset temperature. The identification module is used to acquire historical driving information or current battery demand information of the electric vehicle, and to turn the temperature control module on or off according to at least one of the connection status, the historical driving information or the current battery demand information; or, it is also used to turn the temperature control module on or off according to at least one of the connection status, the historical driving information or the current battery demand information, and the remaining power.

12. The controller according to claim 11, characterized in that, The identification module is used for: In response to the fact that the distance parameter or duration parameter in the historical driving information is less than the corresponding preset parameter value, and the remaining power is greater than or equal to the preset power, and the power battery is connected to the external power source, the temperature control module is activated; In response to the historical driving information where the distance parameter or duration parameter is greater than or equal to the corresponding preset parameter value, the remaining battery power is less than the preset battery power, and the power battery is not connected to the external power source, the temperature control module is turned off.

13. The controller according to claim 11, characterized in that, The current battery demand information includes at least one of a power demand value or a battery capacity demand value; the identification module is used for: In response to the power demand value being greater than or equal to a preset power demand value, the power demand value being less than a preset power demand value, and the remaining power being greater than or equal to a preset power, the temperature control module is activated; In response to the power demand value being less than the preset power demand value, the power demand value being greater than or equal to the preset power demand value, and the remaining power being less than the preset power, the temperature control module is turned off.

14. The controller according to claim 11, characterized in that, The identification module is used for: The temperature control module is turned on or off in response to the comparison result between a parameter in the historical driving information and its corresponding preset parameter value.

15. An electric vehicle, characterized in that, The electric vehicles include: A power battery, an on-board charging system, a battery management system, and a heating device as described in any one of claims 1-7; or, The power battery, on-board charging system, battery management system, and heating device, wherein the heating device includes a heater and a controller as described in any one of claims 8-14.

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