Electric vehicle thermal management system and thermal management method

Abstract

The present invention discloses a thermal management system and a thermal management method for an electric vehicle. The system includes an off-vehicle thermal management system, a terminal device or a cloud platform, and an electric vehicle; the off-vehicle thermal management system includes an information processing module and an off-vehicle thermal management device; the electric vehicle includes a vehicle thermal management system, a power battery, and a cabin; the vehicle thermal management system is used to obtain thermal management information and send it to the terminal device or the cloud platform; the terminal device or the cloud platform is used to obtain the thermal management information sent by the vehicle thermal management system, and control the off-vehicle thermal management device to provide thermal management services for the power battery and the cabin; the off-vehicle thermal management system receives the thermal management information and provides thermal management services for the power battery and the cabin. The present invention can achieve thermal management of the power battery and the cabin of an electric vehicle when parking, so that the power battery and the cabin can maintain a suitable temperature, extend the life of the power battery, and improve the user's driving satisfaction.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile batteries, and in particular to a thermal management system and a thermal management method for an electric vehicle. Background Art

[0002] When the temperature is high or low, thermal management of the car's power battery and cabin is required to help the power battery and cabin maintain a suitable temperature to ensure vehicle safety and a comfortable riding experience. Currently, thermal management of power batteries and cabins is mainly provided by power batteries.

[0003] During the driving process of the car, when the temperature is low, the current OEMs and power battery manufacturers usually use electric heating, air conditioning heat pumps, PTC heating, motor coolant waste heat utilization, motor stall pulse current heating and other methods to heat the battery box, and use air conditioning to heat the cabin. These methods need to work in scenarios where there is sufficient remaining battery in the power battery. In order to limit the thermal management system from consuming too much power from the power battery or because the thermal management system itself can only provide limited heating capacity, when the above method is used to heat the battery box in an environment below -10°C, the heating and insulation effects will be poor, which will seriously restrict the charging and discharging performance of the power battery and affect the service life of the power battery. Similarly, when the temperature is high, the power battery needs to be dissipated or cooled, which will also accelerate the consumption of the power battery's electrical energy and shorten the life of the power battery.

[0004] After the vehicle is powered off, the thermal management of the power battery and the cabin stops. When the vehicle is restarted, the thermal management of the power battery and the cabin is performed again. During the parking process, the temperature of the power battery and the cabin will gradually become the same as the outside temperature, and the effect of the previous thermal management will disappear. When the vehicle is started again, the power battery's electric energy is needed to re-manage the power battery and the cabin, and manage the temperature of the power battery and the cabin from the outside temperature to a suitable operating temperature. In the process of changing from a lower / higher temperature to a suitable temperature, the power battery's electric energy will be consumed, reducing the life of the power battery, and also reducing the user's driving satisfaction. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to solve the problem that the thermal management of an electric vehicle will accelerate the consumption of the power battery, reduce the service life of the power battery and reduce user satisfaction when restarting after parking. A thermal management system and a thermal management method for an electric vehicle are provided, which can avoid thermal runaway of the power battery, and at the same time avoid the thermal management system from not working properly due to insufficient remaining power of the power battery, thereby improving user driving satisfaction.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] An electric vehicle thermal management system includes an off-vehicle thermal management system, a terminal device or a cloud platform, and an electric vehicle; the off-vehicle thermal management system includes an information processing module and an off-vehicle thermal management device; the electric vehicle includes a vehicle thermal management system, a power battery, and a cabin, wherein the power battery and the cabin serve as two clients;

[0008] The vehicle thermal management system is connected to the power battery and the cabin, and is used to obtain thermal management information of the power battery and the cabin, and send the thermal management information to the terminal device or the cloud platform;

[0009] The terminal device or cloud platform is used to obtain thermal management information sent by the vehicle thermal management system, and is also used to control the external thermal management device to provide thermal management services for the power battery and the cabin according to the thermal management information.

[0010] The off-vehicle thermal management system receives thermal management information from a terminal device or a cloud platform, and provides thermal management services for two clients, the power battery and the cabin.

[0011] Furthermore, the vehicle thermal management system includes a sensor and a computing unit; the sensor is arranged in the power battery and the cabin, and is used to obtain the current temperature of the power battery and / or the cabin. The computing unit calls relevant information of the power battery and the cabin based on the current temperature obtained by the sensor, and calculates the thermal management information of the power battery and / or the cabin.

[0012] Furthermore, it also includes a vehicle-mounted heat exchange device; the external thermal management device, the vehicle-mounted heat exchange device, the power battery and the cabin are respectively provided with a water inlet and a water outlet; the water inlet of the vehicle-mounted heat exchange device is respectively connected to the water inlet of the power battery and the cabin, and its water outlet is respectively connected to the water outlet of the power battery and the cabin; when the water inlet and water outlet of the external thermal management device are connected to the water inlet and water outlet of the vehicle-mounted heat exchange device, the external thermal management device can provide heating or cooling for the power battery and / or the cabin.

[0013] Furthermore, the power battery related information includes the maximum temperature of the power battery cells and the minimum temperature of the power battery cells; the cabin related information includes the cabin set temperature.

[0014] Furthermore, the thermal management information of the power battery includes a target temperature of a water inlet of the power battery and a cooling flow rate of the power battery; the thermal management information of the cabin includes a target temperature of a water inlet of the cabin and a cooling flow rate of the cabin.

[0015] Furthermore, the terminal device or cloud platform is also used to dynamically discover external thermal management devices and determine target external thermal management devices; it is also used to obtain the address of the external thermal management device and send the thermal management information of the power battery and the cabin, the vehicle's location information and the time when the vehicle arrives at the location of the external thermal management device to the external thermal management system.

[0016] Preferably, the power battery and the cabin are communicatively connected to the vehicle thermal management system via a CAN network; the vehicle thermal management system is communicatively connected to a terminal device or a cloud platform via Ethernet, and the terminal device or cloud platform is communicatively connected to an external thermal management system via Ethernet.

[0017] The present invention also provides an off-vehicle thermal management method for an electric vehicle, comprising the electric vehicle thermal management system, comprising the following steps:

[0018] The vehicle thermal management system obtains thermal management information of the power battery and the cabin, and sends the thermal management information to the terminal device or cloud platform;

[0019] The terminal device or cloud platform receives the thermal management information sent by the vehicle thermal management system and sends it to the external thermal management system;

[0020] The off-vehicle thermal management system receives thermal management information from a terminal device or a cloud platform, and controls the off-vehicle thermal management device to provide thermal management services for the power battery and the cabin based on the thermal management information.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The system provided by the present invention is used to perform thermal management of electric vehicles. The power battery does not participate in the entire thermal management process. The power battery and the cabin of the electric vehicle can be thermally managed when the vehicle is parked, so that the power battery and the cabin can maintain a suitable temperature, extend the life of the power battery and improve the user's driving satisfaction. At the same time, it can avoid thermal runaway of the power battery and the failure of the thermal management system to work properly due to insufficient remaining power in the power battery. The thermal management capability provided by the off-board thermal management system is not limited by the vehicle, and can still meet the thermal management requirements of the power battery under extreme weather conditions (especially in winter), keep the power battery and the cabin at a suitable temperature, so that users can experience better driving pleasure when using it, and improve the satisfaction of drivers and passengers.

[0023] 2. By publishing the thermal management services for smart cars through the SOA architecture and providing centralized cooling / heating services through the new generation of infrastructure, the scale effect can be used to reduce the thermal management costs of power batteries, and the power batteries can be kept at a suitable operating temperature, which can extend the service life of the power batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The figure is a schematic diagram of a thermal management system for an electric vehicle in the present invention.

[0025] Figure 2 Schematic diagram of the electric vehicle thermal management system in Example 2 of the present invention. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. Example

[0027] This embodiment discloses a thermal management system for an electric vehicle. Figure 1 .

[0028] An electric vehicle thermal management system includes an off-vehicle thermal management system 1, a terminal device or a cloud platform 2, and an electric vehicle. The off-vehicle thermal management system 1 includes an information processing module and an off-vehicle thermal management device. The electric vehicle includes a vehicle thermal management system 3, a power battery 4, and a cabin 5, wherein the power battery 4 and the cabin 5 serve as two clients.

[0029] The vehicle thermal management system 3 is connected to the power battery 4 and the cabin 5 , and is used to obtain thermal management information of the power battery 4 and the cabin 5 , and send the thermal management information to the terminal device or the cloud platform 2 .

[0030] The terminal device or cloud platform 2 is used to obtain thermal management information sent by the vehicle thermal management system 3, and is also used to control the external thermal management device to provide thermal management services for the power battery 4 and the cabin 5 according to the thermal management information.

[0031] The off-vehicle thermal management system 1 receives thermal management information from a terminal device or a cloud platform 2 , and provides thermal management services for two clients, the power battery 4 and the cockpit 5 .

[0032] In specific implementation, the vehicle thermal management system 3 includes a sensor and a computing unit. The sensor is arranged in the power battery 4 and the cabin 5, and is used to obtain the current temperature of the power battery 4 and / or the cabin 5. The computing unit calls the relevant information of the power battery 4 and the cabin 5 based on the current temperature obtained by the sensor, and calculates the thermal management information of the power battery 4 and / or the cabin 5.

[0033] During specific implementation, it also includes a vehicle-mounted heat exchange device. The off-vehicle thermal management device, the on-vehicle heat exchange device 6, the power battery 4 and the cabin 5 are respectively provided with a water inlet and a water outlet. The water inlet of the on-vehicle heat exchange device 6 is respectively connected to the water inlets of the power battery 4 and the cabin 5, and its water outlet is respectively connected to the water outlets of the power battery 4 and the cabin 5. When the water inlet and water outlet of the off-vehicle thermal management device are connected to the water inlet and water outlet of the on-vehicle heat exchange device 6, the off-vehicle thermal management device can provide heating or cooling for the power battery 4 and / or the cabin 5.

[0034] The relevant information of the power battery 4 includes the maximum temperature of the power battery 4 cells and the minimum temperature of the power battery 4 cells. The relevant information of the cabin 5 includes the set temperature of the cabin 5. The thermal management information of the power battery 4 includes the target temperature of the water inlet of the power battery 4 and the cooling flow of the power battery 4. The thermal management information of the cabin 5 includes the target temperature of the water inlet of the cabin 5 and the cooling flow of the cabin 5.

[0035] Preferably, the terminal device or cloud platform 2 is also used to dynamically discover the external thermal management device and determine the target external thermal management device. It is also used to obtain the address of the external thermal management device and send the thermal management information of the power battery 4 and the cabin 5, the location information of the vehicle and the time when the vehicle arrives at the external thermal management device to the external thermal management system 1. So that the information processing module of the external thermal management system 1 controls the external thermal management device to prepare based on the time when the vehicle arrives at the location of the external thermal management device and the thermal management information, and when the vehicle arrives at the external management device, thermal management services can be provided for the vehicle.

[0036] During implementation, the power battery 4 and the cabin 5 are connected to the vehicle thermal management system 3 through the CAN network. The vehicle thermal management system 3 is connected to the terminal device or cloud platform 2 through Ethernet, and the terminal device or cloud platform 2 is connected to the vehicle thermal management system 1 through Ethernet.

[0037] The system provided by the present invention publishes the service of thermal management demand of smart cars through SOA architecture, provides centralized cooling / heating services through new generation infrastructure, can reduce the thermal management cost of power batteries by using scale effect, and keep the power batteries at a suitable working temperature, which can extend the service life of power batteries. The system is used for thermal management of electric vehicles, and the power battery does not participate in the work during the entire thermal management process. It can realize thermal management of the power battery and the cabin of the electric vehicle when parking, so that the power battery and the cabin can maintain a suitable temperature, extend the life of the power battery and improve the user's driving satisfaction. At the same time, it can avoid thermal runaway of the power battery, and the thermal management system cannot work normally due to insufficient remaining power of the power battery. The thermal management capability provided by the off-board thermal management system is not limited by the vehicle, and can still meet the thermal management requirements of the power battery under extreme weather conditions (especially in winter), keep the power battery and the cabin at a suitable temperature, so that users can have a better experience of driving pleasure when using it, and improve the satisfaction of drivers and passengers. Example

[0038] In order to further illustrate the actual effect of using the electric vehicle thermal management system provided by the present invention to perform external thermal management of an electric vehicle, this embodiment discloses an electric vehicle thermal management system and application scenario implemented based on the first embodiment.

[0039] See also Figure 2 , the thermal management of new energy vehicle power battery and cabin thermal management are taken as two services, and the power battery (Client1) and cabin (Client2) are taken as two clients. The thermal management service can be provided by the vehicle cooling / heating equipment (Server1) or the vehicle external thermal management system (Server2).

[0040] At present, the thermal management needs of the power battery (Client1) and the cockpit (Client2) of new energy vehicles during driving or temporary parking are mainly met through on-board cooling / heating equipment (Server1). After the vehicle is powered off, the thermal management of the power battery and the cockpit stops. When the vehicle is restarted, the thermal management of the power battery and the cockpit is performed again. During this parking process, the temperature of the power battery and the cockpit will gradually become the same as that of the outside world, and the effect of the previous thermal management will disappear. When the vehicle is restarted, the power battery's electric energy is needed to re-manage the power battery and the cockpit, and the temperature of the power battery and the cockpit is managed from the outside temperature to a suitable working temperature.

[0041] The off-board thermal management system provided by the present invention provides the thermal management requirements of the power battery (Client1) and the cabin (Client2) through the vehicle thermal management system sensing and computing unit. For the power battery, the maximum temperature of the power battery cell, the minimum temperature of the power electromagnetic cell, the target temperature of the power battery water inlet, the power battery cooling flow, etc. can be given. For the cabin, the current cabin temperature, cabin cooling / heating request, cabin temperature setting temperature, cabin cooling flow, etc. can be given.

[0042] Then, the vehicle cloud and terminal equipment dynamically discover the service provider of the off-vehicle thermal management equipment, and notify the off-vehicle thermal management system (Server2) of the vehicle thermal management requirements such as cooling or heating flow and target set temperature, and the time when the vehicle arrives at the off-vehicle thermal management equipment through Ethernet. The off-vehicle thermal management equipment can adjust the target temperature in advance according to the arrival time of the target vehicle. When the vehicle arrives, it connects to the off-vehicle thermal management equipment, which can adjust the temperature and flow of the cooling / heating water inlet according to the information of the target vehicle, and provide pressure-resistant power supply at the same time to avoid feeding the battery of the entire vehicle. The needs of the power battery (Client1) can be met first through the on-vehicle heat exchange equipment.

[0043] The off-board thermal management system can provide cooling or heating services to multiple vehicles at the same time. The thermal management requirements of the power battery (Client1) and the cabin (Client2) can be set quickly and easily through the terminal equipment.

[0044] In this way, the services required by smart cars are released through the SOA architecture, and the new generation of infrastructure provides centralized cooling / heating services. The scale effect is used to reduce the thermal management cost of power batteries. The power battery does not participate in the entire thermal management process, avoiding thermal runaway of the power battery, and avoiding the failure of the thermal management system to work properly due to insufficient remaining power of the power battery. The thermal management capability provided by the off-vehicle thermal management system is not limited by the vehicle, and can still meet the thermal management needs of the power battery under extreme weather conditions. The off-vehicle thermal management system achieves thermal management through scale, and excessively uses low-quality heat sources, and does not directly use high-quality heat sources such as electricity, which further improves positive and social benefits. The power battery insulation function gives the power battery a suitable temperature, allowing users to better experience driving pleasure when using it in winter, and improves the driving satisfaction of the driver and passengers. By setting the cabin temperature, the cabin temperature is within a suitable temperature range, further improving the satisfaction of the driver and passengers. Example

[0045] This embodiment discloses a method for managing the exterior heat of an electric vehicle based on the first embodiment.

[0046] A method for thermal management of an electric vehicle outside the vehicle, comprising the electric vehicle thermal management system, comprising the following steps:

[0047] The vehicle thermal management system obtains the thermal management information of the power battery and the cabin, and sends the thermal management information to the terminal device or cloud platform.

[0048] The terminal device or cloud platform receives the thermal management information sent by the vehicle thermal management system and sends it to the external thermal management system.

[0049] The off-vehicle thermal management system receives thermal management information from a terminal device or a cloud platform, and controls the off-vehicle thermal management device to provide thermal management services for the power battery and the cabin based on the thermal management information.

[0050] The off-vehicle thermal management method can provide off-vehicle thermal management services for electric vehicles when they are parked. Since the power battery does not participate in the entire thermal management process, thermal management can be provided for the power battery and cabin of the vehicle when it is parked. The power battery thermal management requirements can still be met under extreme weather conditions. The power battery insulation function provides the power battery with a suitable temperature, allowing users to better experience driving pleasure when using it in winter and improve the driving satisfaction of the drivers and passengers. By setting the cabin temperature, the cabin temperature is kept within a suitable temperature range, further improving the satisfaction of the drivers and passengers.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the technical solution. Those skilled in the art should understand that those modifications or equivalent substitutions of the technical solution of the present invention that do not depart from the purpose and scope of the technical solution should be included in the scope of the claims of the present invention.

Claims

1. A thermal management system for an electric vehicle, characterized in that: It includes an off-vehicle thermal management system, a terminal device or a cloud platform, and an electric vehicle; the off-vehicle thermal management system includes an information processing module and an off-vehicle thermal management device; the electric vehicle includes a vehicle thermal management system, a power battery, and a cabin, wherein the power battery and the cabin serve as two clients; The vehicle thermal management system is connected to the power battery and the cabin, and is used to obtain thermal management information of the power battery and the cabin, and send the thermal management information to the terminal device or the cloud platform; the vehicle thermal management system includes a sensor and a computing unit; the sensor is arranged in the power battery and the cabin, and is used to obtain the current temperature of the power battery and / or the cabin, and the computing unit calls the relevant information of the power battery and the cabin based on the current temperature obtained by the sensor, and calculates the thermal management information of the power battery and / or the cabin; The terminal device or cloud platform is used to obtain thermal management information sent by the vehicle thermal management system, and is also used to control the external thermal management device to provide thermal management services for the power battery and the cabin according to the thermal management information; The off-board thermal management system receives thermal management information from a terminal device or a cloud platform, and provides thermal management services for two clients, the power battery and the cabin; The terminal device or cloud platform is also used to dynamically discover the off-vehicle thermal management device and determine the target off-vehicle thermal management device; it is also used to obtain the address of the off-vehicle thermal management device and send the thermal management information of the power battery and the cabin, the location information of the vehicle and the time when the vehicle arrives at the location of the off-vehicle thermal management device to the off-vehicle thermal management system, wherein the off-vehicle thermal management device adjusts the target temperature in advance according to the arrival time of the target vehicle; It also includes a vehicle-mounted heat exchange device; the external thermal management device, the vehicle-mounted heat exchange device, the power battery and the cabin are respectively provided with a water inlet and a water outlet; the water inlet of the vehicle-mounted heat exchange device is respectively connected to the water inlet of the power battery and the cabin, and its water outlet is respectively connected to the water outlet of the power battery and the cabin; when the water inlet and water outlet of the external thermal management device are connected to the water inlet and water outlet of the vehicle-mounted heat exchange device, the external thermal management device can provide heating or cooling for the power battery and / or the cabin.

2. The electric vehicle thermal management system according to claim 1, characterized in that: The relevant information of the power battery includes the maximum temperature of the power battery cells and the minimum temperature of the power battery cells; the relevant information of the cabin includes the set temperature of the cabin.

3. The electric vehicle thermal management system according to claim 2, characterized in that: The thermal management information of the power battery includes a target temperature of a water inlet of the power battery and a cooling flow rate of the power battery; the thermal management information of the cabin includes a target temperature of a water inlet of the cabin and a cooling flow rate of the cabin.

4. The electric vehicle thermal management system according to claim 1, characterized in that: The power battery and the cabin are communicatively connected to the vehicle thermal management system via the CAN network; the vehicle thermal management system is communicatively connected to the terminal device or the cloud platform via Ethernet, and the terminal device or the cloud platform is communicatively connected to the external thermal management system via Ethernet.

5. A method for thermal management outside an electric vehicle, characterized in that: The electric vehicle thermal management system according to any one of claims 1 to 4 comprises the following steps: The vehicle thermal management system obtains thermal management information of the power battery and the cabin, and sends the thermal management information to the terminal device or cloud platform; The terminal device or cloud platform receives the thermal management information sent by the vehicle thermal management system and sends it to the external thermal management system; The off-vehicle thermal management system receives thermal management information from a terminal device or a cloud platform, and controls the off-vehicle thermal management device to provide thermal management services for the power battery and the cabin based on the thermal management information.

Images