Battery thermal management method and device, electronic equipment and electric mine car

Abstract

The present application relates to the technical field of battery thermal management, and particularly relates to a battery thermal management method, device, electronic equipment and electric mine car, wherein the method comprises: judging whether the electric mine car is in a running state or a charging state; if the electric mine car is in the running state, then according to a comparison result between a first preset temperature and a real-time detection temperature of a power battery, the opening of the vehicle-mounted thermal management system for cooling the power battery is controlled; if the electric mine car is in the charging state, then according to a comparison result between a second preset temperature and the real-time detection temperature of the power battery, the opening or stop of the offline thermal management system for heat exchange cooling of the vehicle-mounted thermal management system is controlled, so as to realize the control of the offline thermal management system on the cooling of the power battery; when the electric mine car is in the charging state, the offline thermal management system is controlled to perform heat exchange cooling on the vehicle-mounted thermal management system, so as to solve the problem that the development of the power battery in the electric mine car does not match the thermal management system.

Description

Technical Field

[0001] This invention relates to the field of battery thermal management technology, specifically to a battery thermal management method, device, electronic equipment, and electric mining vehicle. Background Technology

[0002] With the accelerating and in-depth advancement of the global energy structure transformation, the electrification of mining equipment has become an irreversible industry trend. As a high-energy-consuming and high-emission sector, the electrification of mining vehicles is of strategic significance for reducing the carbon footprint of mining areas and improving energy efficiency.

[0003] As electric mining trucks develop towards larger capacity, longer range, and faster charging, their demand for battery thermal management power has increased significantly. The batteries used in electric mining trucks are selected with energy power that can be balanced between 2 and 3C, and the cooling power demand has increased by 3 to 5 times. However, the existing compressors available in the mining truck industry have relatively small power and cannot meet the thermal management requirements of future high-power charging of mining trucks, resulting in a bottleneck in the industry's development. Summary of the Invention

[0004] This invention provides a battery thermal management method, device, electronic device, and electric mining truck. When the electric mining truck is charging, it can control the offline thermal management system to perform heat exchange and cooling on the vehicle thermal management system, thereby realizing the control of the power battery heat dissipation and cooling by the offline thermal management system and solving the problem of mismatch between the development of power batteries and thermal management systems in electric mining trucks.

[0005] In a first aspect, embodiments of this application provide a battery thermal management method applied to an electric mining truck. The electric mining truck includes a power battery, an offline thermal management system, and an on-board thermal management system. The on-board thermal management system is fixedly installed on the electric mining truck and is used to dissipate heat and cool the power battery. The offline thermal management system is connected to the on-board thermal management system and is used to exchange heat and cool the on-board thermal management system. The method includes:

[0006] Determine whether the electric mining truck is in a driving or charging state;

[0007] If the electric mining truck is in motion, the on-board thermal management system will be activated to cool the power battery based on the comparison between the first preset temperature and the real-time detected temperature of the power battery.

[0008] If the electric mining truck is in a charging state, the offline thermal management system controls the on-board thermal management system to turn on or off the heat exchange cooling based on the comparison between the second preset temperature and the real-time detected temperature of the power battery, so as to realize the control of the power battery heat dissipation and cooling by the offline thermal management system; wherein, the second preset temperature is lower than the first preset temperature.

[0009] Optionally, if the electric mining vehicle is in a charging state, the on-line thermal management system is controlled to turn on or off the heat exchange cooling of the on-board thermal management system based on the comparison between the second preset temperature and the real-time detected temperature of the power battery, including:

[0010] If the real-time detected temperature of the power battery is lower than the second preset temperature, the control line thermal management system will stop the heat exchange and cooling of the vehicle thermal management system.

[0011] If the real-time detected temperature of the power battery is greater than the second preset temperature, the control line thermal management system will activate heat exchange and cooling of the vehicle thermal management system.

[0012] Optionally, it also includes:

[0013] When the electric mining truck is charging, and before the control line thermal management system turns on the heat exchange and cooling of the vehicle thermal management system, if the real-time detected temperature of the power battery is greater than the first preset temperature, the control line thermal management system will turn on synchronously with the offline thermal management system so that the vehicle thermal management system and the offline thermal management system can simultaneously cool the power battery.

[0014] The temperature of the power battery, which is simultaneously cooled by the vehicle thermal management system and the offline thermal management system, is monitored in real time until the temperature of the power battery reaches the third preset temperature. At that time, the vehicle thermal management system stops cooling the power battery. The third preset temperature is the temperature between the first preset temperature and the second preset temperature.

[0015] Optionally, if the electric mining truck is in motion, the on-board thermal management system is controlled to activate the power battery cooling function based on a comparison between a first preset temperature and the real-time detected temperature of the power battery, including:

[0016] If the real-time detected temperature of the power battery is greater than the first preset temperature, the vehicle thermal management system will be controlled to start cooling the power battery.

[0017] The temperature of the power battery cooled by the vehicle thermal management system is monitored in real time until the temperature of the power battery reaches the fourth preset temperature, at which point the vehicle thermal management system stops cooling the power battery; the fourth preset temperature is lower than the first preset temperature.

[0018] Optionally, determining whether the electric mining truck is in a driving or charging state includes:

[0019] Based on the power battery's reception of the charging plug signal, it can be determined whether the electric mining truck is in a charging state or not.

[0020] If the electric mining truck is not charging, then determine whether the power battery is discharging.

[0021] If the power battery is discharging, then the electric mining truck is in motion.

[0022] Secondly, this application provides a battery thermal management device applied to an electric mining truck. The electric mining truck includes a power battery, an offline thermal management system, and an on-board thermal management system. The on-board thermal management system is fixedly installed on the electric mining truck and is used to dissipate heat and cool the power battery. The offline thermal management system is connected to the on-board thermal management system and is used to exchange heat and cool the on-board thermal management system. The device includes:

[0023] The first judgment module is used to determine whether the electric mining truck is in a driving state or a charging state;

[0024] The second judgment module is used to control the on-board thermal management system to start the heat dissipation and cooling of the power battery based on the comparison result between the first preset temperature and the real-time detected temperature of the power battery if the electric mining truck is in a driving state.

[0025] The third judgment module is used to control the offline thermal management system to turn on or off the heat exchange cooling of the vehicle thermal management system based on the comparison between the second preset temperature and the real-time detected temperature of the power battery if the electric mining vehicle is in a charging state, so as to realize the control of the offline thermal management system on the heat dissipation and cooling of the power battery; wherein, the second preset temperature is lower than the first preset temperature.

[0026] Thirdly, embodiments of this application provide an electronic device, which includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus;

[0027] Memory, used to store computer programs;

[0028] When a processor executes a program stored in a memory, it implements the steps of the battery thermal management method provided in the first aspect of the embodiments of this application.

[0029] Fourthly, embodiments of this application provide an electric mining vehicle, including the thermal management actuator or the electronic device described above.

[0030] Optionally, the on-board thermal management system includes a water-to-water heat exchanger and a first water pump installed on the electric mining truck, the water-to-water heat exchanger and the first water pump being connected through a first pipeline; the first pipeline is connected to a pipeline for cooling the power battery.

[0031] The offline thermal management system includes a second water pump, a refrigerant heat exchange component, and a plate heat exchanger. Both the refrigerant heat exchange component and the second water pump are connected to the plate heat exchanger. The plate heat exchanger and the second water pump are also connected to a water-to-water heat exchanger. The plate heat exchanger is used to receive the refrigerant generated by the refrigerant heat exchange component so that the refrigerant can exchange heat with the water flowing through the plate heat exchanger.

[0032] Optionally, the refrigerant heat exchange assembly includes a compressor, a condenser, an electric fan, and an expansion valve. The compressor, condenser, and expansion valve are connected in sequence via a second pipeline. The compressor is connected to a plate heat exchanger, and the expansion valve is also connected to the plate heat exchanger. The expansion valve is used to control the on / off state of the second pipeline. The compressor is used to compress the gaseous refrigerant in the second pipeline. The condenser is used to dissipate heat from the gaseous refrigerant in the second pipeline. The electric fan is used to cool the condenser.

[0033] In the battery thermal management method provided in this application, when the electric mining truck is in a charging state, the on-board thermal management system is controlled to turn on or off the heat exchange cooling of the vehicle thermal management system based on the comparison result between the second preset temperature and the real-time detected temperature of the power battery. This achieves the control of the power battery heat dissipation and cooling by the offline thermal management system, and solves the problem of mismatch between the development of the power battery and the thermal management system in the electric mining truck. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic flowchart of the battery thermal management method provided in the embodiments of this application;

[0036] Figure 2 This is a schematic diagram of the battery thermal management device provided in the embodiments of this application;

[0037] Figure 3 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application;

[0038] Figure 4 This is a schematic diagram showing the connection between the vehicle-mounted thermal management system and the offline thermal management system provided in the embodiments of this application. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0040] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0041] The battery thermal management method, apparatus, electronic device, and electric mining truck provided in this application will be described in detail below with reference to the accompanying drawings and through specific embodiments and application scenarios.

[0042] Those skilled in the art will understand that the battery thermal management method provided in the embodiments of this application can be executed by a processor of a single or distributed electronic device (the device is built into the electronic device and the electronic device is located on the mining vehicle). There can be one or more processors. In the case of multiple processors, the multiple processors can be electrically connected or communicatively connected to each other and jointly execute the battery thermal management method provided in the embodiments of this application as modules with different functions.

[0043] Figure 1 This is a schematic flowchart of the battery thermal management method provided in the embodiments of this application, as shown below. Figure 1 As shown, the first aspect of this application provides a battery thermal management method applied to an electric mining truck. The electric mining truck includes a power battery, an offline thermal management system, and an on-board thermal management system. The on-board thermal management system is fixedly installed on the electric mining truck and is used to dissipate heat and cool the power battery. The offline thermal management system is connected to the on-board thermal management system and is used to exchange heat and cool the on-board thermal management system. The method includes the following steps S110-S130:

[0044] Step S110: Determine whether the electric mining truck is in a driving state or a charging state.

[0045] Since the cooling requirements of the power battery on the electric mining truck are different when the electric mining truck is in driving and charging states, this method can be used to determine whether the electric mining truck is in driving or charging states, and select the appropriate cooling method for the power battery based on the determination result, so as to achieve thermal management of the power battery on the electric mining truck in the current state.

[0046] Step S120: If the electric mining vehicle is in motion, the vehicle thermal management system is controlled to activate the power battery cooling function based on the comparison between the first preset temperature and the real-time detected temperature of the power battery.

[0047] The first preset temperature can be the critical value for the safe operating temperature of the power battery.

[0048] Since the power battery generates relatively little heat when the electric mining truck is in motion, after determining that the electric mining truck is in motion, based on the comparison between the first preset temperature and the real-time detected temperature of the power battery, it can be determined whether it is necessary to control the on-board thermal management system to activate the power battery cooling function, so as to achieve timely cooling of the power battery in the electric mining truck while it is in motion.

[0049] Step S130: If the electric mining vehicle is in a charging state, the offline thermal management system controls the on-board thermal management system to turn on or off the heat exchange cooling of the vehicle thermal management system based on the comparison between the second preset temperature and the real-time detected temperature of the power battery, so as to realize the control of the offline thermal management system on the heat dissipation and cooling of the power battery.

[0050] The second preset temperature is lower than the first preset temperature.

[0051] Since more than 60% of the heat generated by the power battery is generated during the charging process, in order to dissipate the heat generated by the power battery in a timely manner, the offline thermal management system compares the second preset temperature with the real-time detected temperature of the power battery to achieve timely heat dissipation and cooling control of the power battery.

[0052] It should be noted that by selecting a second preset temperature lower than the first preset temperature, the temperature of the power battery in the electric mining truck during charging is kept within an ideal range to avoid damage to the power battery due to the heat generated during charging. For example, when the first preset temperature is 30°C, the second preset temperature is 15°C.

[0053] In this step, when the electric mining truck is charging, the heat dissipation and cooling control of the power battery is transferred to the offline thermal management system. This allows the offline thermal management system connected to the electric mining truck to control the on-board thermal management system's heat exchange and cooling without considering the operating conditions of the electric mining truck.

[0054] Using the above method, when the electric mining truck is in a charging state, the offline thermal management system controls the on-board thermal management system to turn on or off the heat exchange cooling of the vehicle thermal management system based on the comparison between the second preset temperature and the real-time detected temperature of the power battery. This enables the offline thermal management system to control the heat dissipation and cooling of the power battery, thus solving the problem of mismatch between the development of the power battery and the thermal management system in electric mining trucks.

[0055] In some possible implementations, if the electric mining vehicle is in a charging state, the control of the offline thermal management system to turn on or off the heat exchange cooling of the on-board thermal management system based on the comparison between the second preset temperature and the real-time detected temperature of the power battery may include the following steps:

[0056] Step S210: If the real-time detected temperature of the power battery is lower than the second preset temperature, the control line thermal management system stops heat exchange and cooling of the vehicle thermal management system.

[0057] Here, if the real-time detected temperature of the power battery is determined to be lower than the second preset temperature, it can be determined that the temperature of the power battery is in an ideal state and there is no need to cool the power battery at this time. Therefore, the control line thermal management system stops the heat exchange and cooling of the vehicle thermal management system to avoid the energy waste caused by cooling the power battery when the temperature is in an ideal state.

[0058] Step S220: If the real-time detected temperature of the power battery is greater than the second preset temperature, the control line thermal management system will start to cool the vehicle thermal management system.

[0059] Since the real-time detected temperature of the power battery is greater than the second preset temperature, it can be determined that the temperature of the power battery is not in an ideal state, and it needs to be cooled. Therefore, the offline thermal management system is activated to exchange heat with the vehicle thermal management system to ensure timely cooling of the power battery.

[0060] By using the above method, the real-time temperature of the power battery and the second preset temperature are compared to determine the timely control of the offline thermal management system on the heat exchange and cooling of the vehicle thermal management system, so as to ensure that the temperature of the power battery is controlled within the ideal range.

[0061] In some possible implementations, the battery thermal management method may further include the following steps:

[0062] Step S310: When the electric mining truck is in a charging state, and before the control line thermal management system turns on the heat exchange cooling of the vehicle thermal management system, if the real-time detected temperature of the power battery is greater than the first preset temperature, then control the vehicle thermal management system to turn on synchronously with the offline thermal management system, so that the vehicle thermal management system and the offline thermal management system can simultaneously dissipate heat and cool the power battery.

[0063] Since the power battery is considered to be in a high temperature range when its real-time detected temperature is higher than the first preset temperature, it needs to be cooled quickly to prevent spontaneous combustion during charging. Therefore, when the electric mining truck is charging, and before the offline thermal management system activates the heat exchange cooling of the vehicle thermal management system, the power battery temperature is monitored in real time and compared with the first preset temperature to determine whether the cooling efficiency of the power battery needs to be increased. When the real-time detected temperature of the power battery is higher than the first preset temperature, the vehicle thermal management system is activated synchronously with the offline thermal management system so that both systems can cool the power battery simultaneously.

[0064] Step S320: Monitor the temperature of the power battery that is simultaneously cooled by the vehicle thermal management system and the offline thermal management system in real time until the temperature of the power battery reaches the third preset temperature, then stop the vehicle thermal management system from cooling the power battery.

[0065] The third preset temperature is the temperature between the first preset temperature and the second preset temperature; for example, the first preset temperature is 30℃, the second preset temperature is 15℃, and the third preset temperature is 25℃.

[0066] Taking a first preset temperature of 30℃, a second preset temperature of 15℃, and a third preset temperature of 25℃ as an example, when the temperature of the power battery is greater than 30℃, the vehicle thermal management system is controlled to start synchronously with the offline thermal management system so that the vehicle thermal management system and the offline thermal management system can simultaneously dissipate heat and cool the power battery; when the temperature of the power battery is between 30℃ and 25℃, the vehicle thermal management system stops dissipating heat and cooling the power battery, and the offline thermal management system dissipates heat and cools the power battery alone; when the temperature of the power battery is lower than 15℃, the offline thermal management system stops dissipating heat and cooling the power battery alone.

[0067] Since the cooling of the power battery on the electric mining truck in the charging state is mainly performed by the offline thermal management system, so that the cooling of the power battery at this moment does not need to consider the working environment, when the temperature of the power battery is simultaneously cooled to the third preset temperature by the vehicle thermal management system and the offline thermal management system, the cooling of the power battery by the vehicle thermal management system is stopped, and the offline thermal management system performs heat exchange cooling on the vehicle thermal management system, so that the offline thermal management system can cool the power battery independently.

[0068] Using the above method, it is possible to determine whether a power battery in a charging state needs rapid heat dissipation and cooling. Specifically, when the real-time detected temperature of the power battery is higher than the first preset temperature, rapid heat dissipation and cooling of the power battery is required. Therefore, by controlling the on-board thermal management system to be activated synchronously with the offline thermal management system, both the on-board and offline thermal management systems can simultaneously provide rapid heat dissipation and cooling of the power battery. When the temperature of the power battery reaches the third preset temperature, the on-board thermal management system stops providing heat dissipation and cooling of the power battery, allowing the offline thermal management system to provide heat dissipation and cooling of the power battery independently, thereby achieving control over the heat dissipation and cooling rate of the power battery at different temperatures.

[0069] In some possible embodiments, if the electric mining truck is in motion, the on-board thermal management system is controlled to activate the power battery cooling function based on a comparison between a first preset temperature and the real-time detected temperature of the power battery. This may include the following steps:

[0070] Step S410: If the real-time detected temperature of the power battery is greater than the first preset temperature, then control the vehicle thermal management system to start the heat dissipation and cooling of the power battery.

[0071] Step S420: Monitor the temperature of the power battery cooled by the vehicle thermal management system in real time until the temperature of the power battery reaches the fourth preset temperature, then stop the vehicle thermal management system from cooling the power battery.

[0072] The fourth preset temperature is lower than the first preset temperature. Here, the fourth preset temperature can be the ideal temperature critical value of the power battery in the discharge state.

[0073] By employing the above method, the temperature of the power battery in the electric mining truck under driving conditions is monitored in real time. When the temperature exceeds the first preset temperature, the vehicle thermal management system is controlled to activate the cooling function for the power battery, thereby improving the timeliness of the vehicle thermal management system in cooling the power battery. When the temperature of the power battery reaches the fourth preset temperature, the vehicle thermal management system stops cooling the power battery to avoid further cooling of the power battery when it is already at an ideal temperature, thus reducing energy waste in the vehicle thermal management system.

[0074] In some possible implementations, determining whether the electric mining truck is in a driving state or a charging state may include the following steps:

[0075] Step S510: Determine whether the electric mining truck is in a charging state or not, based on the power battery's reception of the charging plug signal.

[0076] Here, when the charging gun is inserted into the electric mining car, a charging gun signal is triggered, which means that the charging gun is charging the power battery. Therefore, the electric mining car can be determined to be in a charging state or not by observing whether the power battery receives the charging gun signal.

[0077] Step S520: If the electric mining truck is not charging, determine whether the power battery is discharging.

[0078] Step S530: If the power battery is in a discharging state, then the electric mining truck is determined to be in a driving state.

[0079] If the power battery does not receive a charging plug signal, the electric mining truck is considered to be in an uncharged state. When the electric mining truck is not in a charging state, its state can be either in a driving state or a non-driving state. Since the electric mining truck can be considered to be in a non-driving state when the power battery is not in a discharging state, that is, the temperature of the power battery will not change according to its discharge. Therefore, by determining that the electric mining truck is in a driving state by the power battery being in a discharging state, the temperature of the power battery in the discharging state can be monitored to ensure that the temperature of the battery system in the discharging state is controlled within an ideal range.

[0080] Please see Figure 2 This is a schematic diagram of the battery thermal management device provided in an embodiment of this application. A second aspect of this application provides a battery thermal management device applied to an electric mining truck. The electric mining truck includes a power battery, an offline thermal management system, and an on-board thermal management system. The on-board thermal management system is fixedly installed on the electric mining truck and is used to dissipate heat and cool the power battery. The offline thermal management system is connected to the on-board thermal management system and is used for heat exchange and cooling of the on-board thermal management system. The device includes:

[0081] The first judgment module 610 is used to determine whether the electric mining truck is in a driving state or a charging state.

[0082] The second judgment module 620 is used to control the on-board thermal management system to start the heat dissipation and cooling of the power battery based on the comparison result between the first preset temperature and the real-time detected temperature of the power battery if the electric mining truck is in a driving state.

[0083] The third judgment module 630 is used to control the offline thermal management system to turn on or off the heat exchange cooling of the vehicle thermal management system based on the comparison result between the second preset temperature and the real-time detected temperature of the power battery if the electric mining vehicle is in a charging state, so as to realize the control of the offline thermal management system on the heat dissipation and cooling of the power battery; wherein, the second preset temperature is lower than the first preset temperature.

[0084] Optionally, the third judgment module 630 includes:

[0085] The heat dissipation and cooling stop unit is used to control the offline thermal management system to stop the heat exchange and cooling of the vehicle thermal management system if the real-time detected temperature of the power battery is lower than the second preset temperature.

[0086] The heat dissipation and cooling activation unit is used to control the offline thermal management system to activate heat exchange and cooling of the vehicle thermal management system if the real-time detected temperature of the power battery is greater than the second preset temperature.

[0087] Optionally, the device further includes:

[0088] The synchronous activation control module is used to activate the vehicle thermal management system synchronously with the offline thermal management system when the electric mining truck is charging and before the offline thermal management system activates the heat exchange and cooling of the vehicle thermal management system. This allows the vehicle thermal management system and the offline thermal management system to simultaneously cool the power battery.

[0089] The vehicle thermal management system stop control module is used to monitor the temperature of the power battery, which is simultaneously cooled by the vehicle thermal management system and the offline thermal management system, in real time. When the temperature of the power battery reaches the third preset temperature, the vehicle thermal management system stops cooling the power battery. The third preset temperature is the temperature between the first preset temperature and the second preset temperature.

[0090] Optionally, the second determination module 620 includes:

[0091] The first vehicle thermal management system control unit is used to control the vehicle thermal management system to start the heat dissipation and cooling of the power battery if the real-time detected temperature of the power battery is greater than the first preset temperature.

[0092] The second vehicle thermal management system control unit is used to monitor the temperature of the power battery that is cooled by the vehicle thermal management system in real time, and to stop the vehicle thermal management system from cooling the power battery when the temperature of the power battery reaches the fourth preset temperature; the fourth preset temperature is lower than the first preset temperature.

[0093] Optionally, the first judgment module 610 includes:

[0094] The first state determination unit is used to determine whether the electric mining truck is in a charging state or not charging state based on the power battery's reception of the charging plug signal.

[0095] The second state determination unit is used to determine whether the power battery is in a discharging state if the electric mining truck is in an uncharged state.

[0096] The third state determination unit is used to determine that the electric mining truck is in a driving state if the power battery is in a discharging state.

[0097] The battery thermal management device provided in the second aspect of the embodiments of this application can realize the various processes implemented in the above method embodiments and achieve the same beneficial effects. To avoid repetition, it will not be described again here.

[0098] Please see Figure 3 This is a schematic diagram of the structure of the electronic device 700 provided in the embodiments of this application. The third aspect of the embodiments of this application provides an electronic device 700, including a processor 710 and a memory 720. The memory 720 stores machine-executable instructions that can be executed by the processor 710. The processor 710 can execute the machine-executable instructions to implement the above-mentioned battery thermal management method.

[0099] The fourth aspect of this application provides an electric mining vehicle, which stores instructions that, when executed by a processor, cause the processor to implement the aforementioned battery thermal management method.

[0100] Optionally, see Figure 4 The vehicle-mounted thermal management system includes a water-to-water heat exchanger and a first water pump installed on the electric mining truck. The water-to-water heat exchanger and the first water pump are connected through a first pipeline. The first pipeline is connected to a pipeline used for cooling the power battery. The offline thermal management system includes a second water pump, a refrigerant heat exchange component, and a plate heat exchanger. Both the refrigerant heat exchange component and the second water pump are connected to the plate heat exchanger. The plate heat exchanger and the second water pump are also connected to the water-to-water heat exchanger. The plate heat exchanger is used to receive the refrigerant generated by the refrigerant heat exchange component so that the refrigerant can exchange heat with the water flowing through the plate heat exchanger.

[0101] The connection between the plate heat exchanger and the water-to-water heat exchanger is detachable. The refrigerant heat exchange components and the plate heat exchanger can be placed on the electric mining car or on the ground. In this embodiment, the offline thermal management system is an external component of the electric mining car. Therefore, when designing the structure of the electric mining car, the size of the offline thermal management system, its power and refrigeration capacity, etc., do not need to be considered.

[0102] In this embodiment, by selecting a structure for the vehicle-mounted thermal management system that includes a water-to-water heat exchanger and a first water pump mounted on the electric mining truck, the vehicle-mounted thermal management system can cool and dissipate heat from the power battery during the operation of the electric mining truck without requiring an excessively large cooling capacity. Simultaneously, the offline thermal management system is selected to include a structure comprising a second water pump, a refrigerant heat exchange component, and a plate heat exchanger. The refrigerant heat exchange component and the plate heat exchanger are connected, and both the plate heat exchanger and the second water pump are also connected to the water-to-water heat exchanger. This allows the plate heat exchanger to receive the refrigerant generated by the refrigerant heat exchange component, enabling the refrigerant to exchange heat with the water pumped to the plate heat exchanger by the second water pump. This achieves the following: the water pumped by the second water pump in the water-to-water heat exchanger is heated by the refrigerant generated by the refrigerant heat exchange component in the plate heat exchanger. The heated water then flows back to the water-to-water heat exchanger and circulates in the first pipeline under the action of the first water pump, thereby improving the cooling efficiency of the vehicle-mounted thermal management system for the power battery.

[0103] Therefore, the on-board thermal management system and the offline thermal management system in this embodiment can optimize the overall vehicle thermal management system. Not only can they reduce the number of on-board thermal management systems, and without requiring excessive cooling capacity, the offline thermal management system can also improve the cooling capacity of the on-board thermal management system by allowing the plate heat exchanger to receive the refrigerant generated by the refrigerant heat exchange component and exchange heat with the water in the pipeline connected to the water-water heat exchanger. This allows the cooling capacity of the on-board thermal management system to dissipate heat and cool the power battery in the electric mining truck that is in the charging state.

[0104] Optionally, see Figure 4 The refrigerant heat exchange assembly includes a compressor, a condenser, an electric fan, and an expansion valve. The compressor, condenser, and expansion valve are connected in sequence through a second pipeline. The compressor is connected to a plate heat exchanger, and the expansion valve is also connected to the plate heat exchanger. The expansion valve is used to control the opening and closing of the second pipeline. The compressor is used to compress the gaseous refrigerant in the second pipeline. The condenser is used to dissipate heat from the gaseous refrigerant in the second pipeline. The electric fan is used to cool the condenser.

[0105] It should be noted that the compressor here can be a compressor with industrial-grade cooling capacity. Since the refrigerant heat exchange component in this application is not an on-board component of the electric mining truck, but an external component of the electric mining truck, the compressor in the refrigerant heat exchange component is also an external component of the electric mining truck. Therefore, when selecting the compressor, there is no need to consider the usage conditions and vibration environment of the electric mining truck.

[0106] Here, an industrial-grade compressor with a cooling capacity of at least 60kW can be selected to address the issue that the maximum cooling capacity of compressors used in existing electric mining trucks is only 15kW.

[0107] In one embodiment of this application, a computer program product is also provided, including a computer program that, when executed by a processor, implements the battery thermal management method according to the above embodiments.

[0108] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product implemented on one or more computer-usable storage electric mining vehicles (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0109] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 The computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The functions specified in one or more boxes. These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable apparatus for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0110] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0111] The memory may include non-persistent memory in a computer-readable electric mining vehicle, in the form of random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of a computer-readable electric mining vehicle.

[0112] Computer-readable media includes both permanent and non-permanent, movable and non-movable media, and information storage can be achieved by any method or technology. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transitory media that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0113] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0114] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

[0115] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A battery thermal management method, characterized in that, The method is applied to electric mining trucks, wherein the electric mining truck includes a power battery, an offline thermal management system, and an on-board thermal management system. The on-board thermal management system is fixedly installed on the electric mining truck and is used to dissipate heat and cool the power battery. The offline thermal management system is connected to the on-board thermal management system and is used to exchange heat and cool the on-board thermal management system. The method includes: Determine whether the electric mining truck is in a driving state or a charging state; If the electric mining vehicle is in motion, the on-board thermal management system is controlled to activate the cooling function of the power battery based on the comparison between the first preset temperature and the real-time detected temperature of the power battery. If the electric mining vehicle is in a charging state, the offline thermal management system controls the on-board thermal management system to turn on or off the heat exchange cooling of the vehicle thermal management system based on the comparison between the second preset temperature and the real-time detected temperature of the power battery, so as to realize the control of the offline thermal management system on the heat dissipation and cooling of the power battery; the first preset temperature is greater than the second preset temperature; Also includes: When the electric mining vehicle is in a charging state, and before the offline thermal management system controls the heat exchange and cooling of the vehicle thermal management system, if the real-time detected temperature of the power battery is greater than the first preset temperature, then the vehicle thermal management system is controlled to start synchronously with the offline thermal management system, so that the vehicle thermal management system and the offline thermal management system simultaneously dissipate heat and cool the power battery. The temperature of the power battery, which is simultaneously cooled by the vehicle-mounted thermal management system and the offline thermal management system, is monitored in real time until the temperature of the power battery reaches a third preset temperature, at which point the vehicle-mounted thermal management system stops cooling the power battery; the third preset temperature is the temperature between the first preset temperature and the second preset temperature.

2. The battery thermal management method according to claim 1, characterized in that, If the electric mining vehicle is in a charging state, the offline thermal management system controls the on / off operation of the on-board thermal management system's heat exchange cooling based on a comparison between the second preset temperature and the real-time detected temperature of the power battery, including: If the real-time detected temperature of the power battery is lower than the second preset temperature, the offline thermal management system is controlled to stop heat exchange and cooling of the vehicle thermal management system. If the real-time detected temperature of the power battery is greater than the second preset temperature, the offline thermal management system is controlled to start heat exchange cooling for the vehicle thermal management system.

3. The battery thermal management method according to claim 1, characterized in that, If the electric mining vehicle is in motion, the on-board thermal management system is controlled to activate the cooling function for the power battery based on a comparison between a first preset temperature and the real-time detected temperature of the power battery, including: If the real-time detected temperature of the power battery is greater than the first preset temperature, the vehicle thermal management system is controlled to start the heat dissipation and cooling of the power battery. The temperature of the power battery cooled by the vehicle thermal management system is monitored in real time until the temperature of the power battery reaches a fourth preset temperature, at which point the vehicle thermal management system stops cooling the power battery; the fourth preset temperature is lower than the first preset temperature.

4. The battery thermal management method according to claim 1, characterized in that, The determination of whether the electric mining truck is in a driving state or a charging state includes: Based on the power battery's reception of the charging plug signal, it is determined whether the electric mining truck is in a charging state or not. If the electric mining truck is not charging, then determine whether the power battery is discharging. If the power battery is in a discharging state, then the electric mining truck is determined to be in a driving state.

5. A battery thermal management device, characterized in that, An application is made to an electric mining truck, the electric mining truck including a power battery, an offline thermal management system, and an on-board thermal management system. The on-board thermal management system is fixedly installed on the electric mining truck and is used to dissipate heat and cool the power battery. The offline thermal management system is connected to the on-board thermal management system and is used for heat exchange and cooling of the on-board thermal management system. The device includes: The first judgment module is used to determine whether the electric mining vehicle is in a driving state or a charging state; The second judgment module is used to control the on-board thermal management system to activate the heat dissipation and cooling of the power battery based on the comparison result between the first preset temperature and the real-time detected temperature of the power battery if the electric mining vehicle is in a driving state. The third judgment module is used to control the offline thermal management system to turn on or off the cooling of the power battery based on the comparison result between the second preset temperature and the real-time detected temperature of the power battery if the electric mining vehicle is in a charging state; wherein the second preset temperature is lower than the first preset temperature. Also includes: The synchronous activation control module is used to control the vehicle thermal management system to be activated synchronously with the offline thermal management system when the electric mining vehicle is in a charging state and before the offline thermal management system is activated to cool the vehicle thermal management system. If the real-time detected temperature of the power battery is greater than the first preset temperature, the vehicle thermal management system is activated synchronously with the offline thermal management system so that the vehicle thermal management system and the offline thermal management system can simultaneously cool the power battery. The vehicle thermal management system stop control module is used to monitor the temperature of the power battery that is simultaneously cooled by the vehicle thermal management system and the offline thermal management system in real time, and to stop the vehicle thermal management system from cooling the power battery when the temperature of the power battery reaches a third preset temperature; the third preset temperature is the temperature between the first preset temperature and the second preset temperature.

6. An electronic device, characterized in that, The electronic device includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; Memory, used to store computer programs; When a processor executes a program stored in a memory, it implements the steps of the battery thermal management method according to any one of claims 1-4.

7. An electric mining car, characterized in that, This includes the battery thermal management device as described in claim 5 or the electronic device as described in claim 6.

8. The electric mining car according to claim 7, characterized in that, The vehicle-mounted thermal management system includes a water-to-water heat exchanger and a first water pump installed on the electric mining truck. The water-to-water heat exchanger and the first water pump are connected through a first pipeline. The first pipeline is connected to a pipeline used for cooling the power battery. The offline thermal management system includes a second water pump, a refrigerant heat exchange component, and a plate heat exchanger. The refrigerant heat exchange component and the second water pump are both connected to the plate heat exchanger. The plate heat exchanger and the second water pump are also connected to the water-to-water heat exchanger. The plate heat exchanger is used to receive the refrigerant generated by the refrigerant heat exchange component so that the refrigerant can exchange heat with the water flowing through the plate heat exchanger.

9. The electric mining car according to claim 8, characterized in that, The refrigerant heat exchange assembly includes a compressor, a condenser, an electric fan, and an expansion valve. The compressor, condenser, and expansion valve are connected in sequence via a second pipeline. The compressor is connected to the plate heat exchanger, and the expansion valve is also connected to the plate heat exchanger. The expansion valve is used to control the opening and closing of the second pipeline. The compressor is used to compress the gaseous refrigerant in the second pipeline. The condenser is used to dissipate heat from the gaseous refrigerant in the second pipeline. The electric fan is used to cool the condenser.

Images