Commercial vehicle battery thermal management control method and device, electronic equipment and storage medium

Abstract

The present application relates to a kind of commercial vehicle battery thermal management control method, device, electronic equipment and storage medium, belong to new energy thermal management technical field, wherein the commercial vehicle battery thermal management control method includes: based on the temperature of the single body of battery, determine the thermal management mode of battery, the thermal management mode of battery includes refrigeration mode, heating mode or isothermal self-circulation mode;After determining the thermal management mode of battery, based on the temperature of the outlet cooling liquid of electric drive and / or ambient temperature, determine the refrigeration mode or heating mode of battery.The present application realizes the battery thermal management control demand at the same time, further determine the battery thermal management mode in combination with the external temperature factor of battery, so that battery thermal management control is more targeted, thereby improve the efficiency of battery thermal management control, avoid the resource waste of battery thermal management control, save the implementation cost of battery thermal management control.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy thermal management, and particularly relates to a commercial vehicle battery thermal management control method and device, electronic equipment and a storage medium. BACKGROUND

[0002] The prior art generally preferentially adopts a compressor to refrigerate the battery, and only when the compressor cannot be started due to the influence of the characteristics of the R134a refrigerant coolant in a low-temperature environment, a low-temperature radiator is used to refrigerate the battery. This technology only passively uses the low-temperature radiator to refrigerate the battery, and once the compressor can be started, the compressor refrigeration is still preferentially adopted.

[0003] The working conditions of a commercial vehicle are complex, and the battery heating power changes greatly during operation, the temperature changes in a wide range, and the corresponding thermal management demand is complex. In particular, in a low-temperature environment, the heating and refrigeration demands may be switched back and forth. When the battery has a heating demand, the existing technology starts the electric drive to store heat, and the battery is heated after the temperature of the coolant is raised. Once the battery exits the heating mode, the electric drive exits the heat storage mode, and the temperature of the electric drive coolant is not constrained, so that the temperature of the coolant quickly decreases, and the recovered motor waste heat is lost. At this time, although the refrigeration demand of the battery can be quickly responded, if the battery enters the heating mode again, the electric drive needs to store heat again, and the heat storage time is long, which is not conducive to the recycling of the electric drive waste heat. SUMMARY

[0004] Therefore, it is necessary to provide a commercial vehicle battery thermal management control method and device, electronic equipment and a storage medium to solve the problem that the current commercial vehicle battery thermal management control scheme is not efficient and is prone to resource waste.

[0005] To solve the above problems, the present application provides a commercial vehicle battery thermal management control method, comprising:

[0006] Based on the cell temperature of the battery, the thermal management mode of the battery is determined, and the thermal management mode of the battery includes a refrigeration mode, a heating mode or an isothermal self-circulation mode;

[0007] After determining the thermal management mode of the battery, the refrigeration mode or the heating mode of the battery is determined based on the outlet coolant temperature of the electric drive and / or the ambient temperature.

[0008] In one possible implementation, the determination of the thermal management mode of the battery based on the cell temperature of the battery comprises:

[0009] In the case that the highest cell temperature of the battery is greater than or equal to the first temperature threshold, the thermal management mode of the battery is determined as the refrigeration mode;

[0010] When the lowest single cell temperature of the battery is less than or equal to the second temperature threshold, the thermal management mode of the battery is determined to be the heating mode.

[0011] When the temperature of each individual cell of the battery is greater than the second temperature threshold and less than the first temperature threshold, the thermal management mode of the battery is determined to be the equal-temperature self-circulation mode.

[0012] The first temperature threshold is greater than the second temperature threshold.

[0013] In one possible implementation, determining the battery's cooling or heating method based on the electric drive outlet coolant temperature and / or ambient temperature includes:

[0014] If the battery's thermal management mode is determined to be cooling mode, the cooling method of the battery is determined based on the electric drive outlet coolant temperature and the ambient temperature.

[0015] When the battery's thermal management mode is determined to be heating mode, the heating method of the battery is determined based on the temperature of the coolant at the electric drive outlet.

[0016] In one possible implementation, determining the battery cooling method based on the electric drive outlet coolant temperature and ambient temperature includes:

[0017] When the ambient temperature is greater than or equal to the third temperature threshold, it is determined that a compressor should be used for battery cooling.

[0018] When the ambient temperature is less than or equal to the fourth temperature threshold, it is determined that a low-temperature radiator should be used for battery cooling.

[0019] When the ambient temperature is greater than the fourth temperature threshold and less than the third temperature threshold, the cooling method of the battery is determined based on the temperature of the coolant at the electric drive outlet.

[0020] The third temperature threshold is greater than the fourth temperature threshold.

[0021] In one possible implementation, determining the battery cooling method based on the electric drive outlet coolant temperature includes:

[0022] If the coolant temperature at the electric drive outlet is greater than or equal to the fifth temperature threshold, it is determined that a compressor should be used for battery cooling.

[0023] If the coolant temperature at the electric drive outlet is below the fifth temperature threshold, a low-temperature radiator will be used for battery cooling.

[0024] In one possible implementation, determining the battery heating method based on the electric drive outlet coolant temperature includes:

[0025] If the coolant temperature at the electric drive outlet is greater than or equal to the lowest single cell temperature of the battery, it is determined that the waste heat from the electric drive will be used to heat the battery.

[0026] If the coolant temperature at the electric drive outlet is lower than the lowest individual cell temperature of the battery, then the battery will be heated using a motor.

[0027] In one possible implementation, the switching between battery thermal management modes is achieved based on the regulation of a six-way water valve.

[0028] The present invention also provides a commercial vehicle battery thermal management control device, comprising:

[0029] The first determining module is used to determine the thermal management mode of the battery based on the temperature of the individual cells of the battery. The thermal management mode of the battery includes a cooling mode, a heating mode, or a temperature equalization self-circulation mode.

[0030] The second determining module is used to determine the cooling or heating method of the battery based on the electric drive outlet coolant temperature and / or ambient temperature after determining the battery's thermal management mode.

[0031] The present invention also provides an electronic device, including a memory and a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, it implements the commercial vehicle battery thermal management control method as described above.

[0032] The present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the commercial vehicle battery thermal management control method as described above.

[0033] The beneficial effects of this invention are as follows: The commercial vehicle battery thermal management control method, device, electronic equipment, and storage medium provided by this invention first obtain the temperature of all individual batteries, and then determine the battery's thermal management mode as a heating mode, cooling mode, or isothermal self-circulation mode based on the individual battery temperatures, thereby clarifying the battery's thermal management requirements. Next, based on the coolant temperature at the electric drive outlet and / or the ambient temperature, the cooling or heating method of the battery can be further determined. This allows for more targeted implementation of the battery's thermal management requirements based on the current temperature state of the battery and the environmental conditions, determining a more resource-efficient cooling or heating method. While fulfilling the battery's thermal management control requirements, this invention also considers the external temperature factors of the battery to determine a further refined battery thermal management method, making the battery thermal management control more targeted, thereby improving the efficiency of battery thermal management control, avoiding resource waste in battery thermal management control, and saving on the implementation costs of battery thermal management control. Attached Figure Description

[0034] Figure 1A flowchart illustrating an embodiment of the commercial vehicle battery thermal management control method provided by the present invention;

[0035] Figure 2 This is a schematic diagram of the structure of an embodiment of the six-way water valve provided by the present invention;

[0036] Figure 3 A schematic diagram of an embodiment of the commercial vehicle battery thermal management device provided by the present invention;

[0037] Figure 4 A schematic diagram of the structure of an embodiment of the electronic device provided by the present invention. Detailed Implementation

[0038] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0039] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In the description of this invention, reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the described embodiments can be combined with other embodiments.

[0041] Current technologies generally prioritize compressor cooling for the battery. Only when the compressor cannot start due to the properties of R134a refrigerant in low-temperature environments will a low-temperature radiator be used for battery cooling. This technology passively uses the low-temperature radiator for battery cooling; once the compressor can start, it prioritizes compressor cooling. In reality, as long as the ambient temperature allows and the electric drive coolant temperature is not high, the low-temperature radiator can be used first for battery cooling. When the cooling capacity is insufficient and the electric drive coolant temperature rises, it can then switch to compressor cooling. After the electric drive coolant temperature drops, it can switch back to the low-temperature radiator. This way, while meeting the battery's cooling needs, compressor operating time can be further reduced, thus lowering overall vehicle energy consumption.

[0042] Commercial vehicles operate under complex conditions. During operation, battery heat generation varies significantly, and temperature ranges are wide, leading to complex thermal management requirements, especially in low-temperature environments where the vehicle may switch back and forth between heating and cooling needs. Current technology only initiates heat storage in the electric drive when the battery requires heating, raising the coolant temperature to heat the battery. Once the battery exits heating mode, the electric drive exits heat storage mode without controlling the coolant temperature, causing the coolant temperature to drop rapidly and the recovered motor heat to be lost. While this allows for a quick response to the battery's cooling needs, if the battery re-enters heating mode, the electric drive needs to regenerate heat, resulting in a long heat storage time and hindering the recovery and utilization of waste heat from the electric drive.

[0043] This invention proposes a thermal management control method for commercial vehicle batteries, which can maintain the temperature of the electric drive coolant within a suitable range, meet the heating and cooling needs of the battery in low-temperature environments, achieve cooling of the low-temperature radiator, and realize the rapid switching between using the electric drive coolant to dissipate heat from the battery and using the waste heat from the motor to heat the battery, thus responding promptly to the battery thermal management needs.

[0044] The specific embodiments are described in detail below:

[0045] A specific embodiment of the present invention discloses a thermal management control method for commercial vehicle batteries, combined with... Figure 1 Let's take a look. Figure 1 A flowchart illustrating an embodiment of the commercial vehicle battery thermal management control method provided by the present invention includes steps S101 and S102, wherein:

[0046] In step S101, the thermal management mode of the battery is determined based on the temperature of the individual cells of the battery. The thermal management mode of the battery includes cooling mode, heating mode or temperature equalization self-circulation mode.

[0047] In step S102, after determining the thermal management mode of the battery, the cooling method or heating method of the battery is determined based on the temperature of the electric drive outlet coolant and / or the ambient temperature.

[0048] During implementation, the individual cell temperature of the battery can be obtained first. Since the battery consists of multiple cells, there may be deviations in the individual cell temperatures between them. Therefore, it is necessary to obtain the individual cell temperatures of all cells, and then determine the battery's thermal management mode based on the individual cell temperatures. According to the battery's thermal management requirements, the battery's thermal management mode can be divided into three types: heating mode, cooling mode, and isothermal self-circulation mode. The corresponding operations are heating the battery, cooling the battery, and not heating or cooling the battery.

[0049] After determining the battery's thermal management mode, the current thermal management status of the battery can be determined based on the coolant temperature at the electric drive outlet and / or the ambient temperature. This allows for further determination of the battery's cooling or heating methods, enabling more targeted battery thermal management control. For example, the equipment used for cooling can be determined based on the ambient temperature, and the availability of waste heat from the electric drive can be determined based on the coolant temperature at the electric drive outlet.

[0050] The commercial vehicle battery thermal management control method provided by this invention can be applied to the battery thermal management control of pure electric commercial vehicles, as well as the battery thermal management control of hybrid commercial vehicles. This invention does not specifically limit it in this regard.

[0051] Compared with existing technologies, the commercial vehicle battery thermal management control method provided in this embodiment first obtains the temperature of all individual batteries, and then determines the battery thermal management mode as a heating mode, cooling mode, or isothermal self-circulation mode based on the individual battery temperatures, thereby clarifying the battery's thermal management requirements. Next, based on the coolant temperature at the electric drive outlet and / or the ambient temperature, the cooling or heating method of the battery is further determined. This allows for more targeted implementation of the battery's thermal management requirements based on the current temperature state of the battery and the environmental conditions, identifying a more resource-efficient cooling or heating method. While fulfilling the battery thermal management control requirements, this invention also considers the external temperature factors of the battery to determine a more targeted battery thermal management method, thereby improving the efficiency of battery thermal management control, avoiding resource waste, and saving implementation costs.

[0052] For example, determining the thermal management mode of the battery based on the individual cell temperature includes:

[0053] When the highest single cell temperature of the battery is greater than or equal to the first temperature threshold, the thermal management mode of the battery is determined to be cooling mode.

[0054] When the lowest single cell temperature of the battery is less than or equal to the second temperature threshold, the thermal management mode of the battery is determined to be the heating mode.

[0055] When the temperature of each individual cell of the battery is greater than the second temperature threshold and less than the first temperature threshold, the thermal management mode of the battery is determined to be the equal-temperature self-circulation mode.

[0056] The first temperature threshold is greater than the second temperature threshold.

[0057] Specifically, when determining the thermal management mode of a battery based on the temperature of each individual battery cell, the individual cell temperatures of all batteries can be obtained first, and then the thermal management mode of the battery can be determined based on the individual cell temperatures of all batteries and a preset temperature threshold.

[0058] For example, the first temperature threshold can be set to 35. Set the second threshold to 15 When the highest single cell temperature of the battery When the battery's thermal management mode is set to cooling mode, the battery's lowest single-cell temperature can be used. When the temperature of any single cell in a battery is high, the thermal management mode of the battery can be set to heating mode; At this time, the battery's thermal management mode can be set to the equal-temperature self-circulation mode.

[0059] Furthermore, a certain hysteresis temperature difference can be set when determining the temperature threshold, thereby adjusting the sensitivity of battery thermal management mode recognition. The first and second temperature thresholds can also be adjusted according to the actual usage environment and region of the commercial vehicle; this invention does not impose specific limitations on this.

[0060] By setting a temperature threshold to determine the battery's thermal management mode, the battery's thermal management control can be made more precise, thereby improving the efficiency of battery thermal management control.

[0061] For example, determining the cooling or heating method of the battery based on the temperature of the electric drive outlet coolant and / or the ambient temperature includes:

[0062] If the battery's thermal management mode is determined to be cooling mode, the cooling method of the battery is determined based on the electric drive outlet coolant temperature and the ambient temperature.

[0063] When the battery's thermal management mode is determined to be heating mode, the heating method of the battery is determined based on the temperature of the coolant at the electric drive outlet.

[0064] Specifically, when determining the battery's cooling or heating method based on the coolant temperature at the electric drive outlet and / or the ambient temperature, if the battery's thermal management mode is already determined to be cooling mode, the cooling method can be determined based on the coolant temperature at the electric drive outlet and the ambient temperature. Using the coolant temperature at the electric drive outlet and the ambient temperature allows for a more accurate determination of the battery's current thermal management state, thus more rationally determining whether cooling should be achieved through a compressor or a low-temperature radiator. For example, under permissible temperature conditions, a low-temperature radiator can be used instead of a compressor for cooling.

[0065] If the battery's thermal management mode is determined to be heating mode, the heating method can be determined based on the coolant temperature at the electric drive outlet. This coolant temperature also helps determine whether the motor's residual heat is still usable, thus deciding whether to activate the motor for heating. For example, if the coolant temperature at the electric drive outlet is high, the motor's residual heat may be sufficient to meet the battery's heating needs, eliminating the need for motor heating.

[0066] For example, determining the battery cooling method based on the electric drive outlet coolant temperature and ambient temperature includes:

[0067] When the ambient temperature is greater than or equal to the third temperature threshold, it is determined that a compressor should be used for battery cooling.

[0068] When the ambient temperature is less than or equal to the fourth temperature threshold, it is determined that a low-temperature radiator should be used for battery cooling.

[0069] When the ambient temperature is greater than the fourth temperature threshold and less than the third temperature threshold, the cooling method of the battery is determined based on the temperature of the coolant at the electric drive outlet.

[0070] The third temperature threshold is greater than the fourth temperature threshold.

[0071] Specifically, when determining the cooling method of the battery based on the coolant temperature at the electric drive outlet and the ambient temperature, a preset temperature threshold can also be used to assist in determining the cooling method.

[0072] For example, the temperature threshold at which the compressor's cooling effect is significantly higher than the low-temperature radiator's cooling effect can be set as the third temperature threshold, such as... And set the temperature threshold at which the compressor cannot operate as the fourth temperature threshold, such as When the ambient temperature If so, it can be determined that a compressor is used for battery cooling, and when the ambient temperature... If so, then it can be determined that a low-temperature radiator is used for battery cooling.

[0073] When the ambient temperature is above the fourth temperature threshold but below the third temperature threshold, both the compressor and the low-temperature radiator can provide battery cooling. Therefore, it is necessary to determine which cooling method is more resource-efficient based on the coolant temperature at the electric drive outlet. For example, when the coolant temperature at the electric drive outlet is high, using the low-temperature radiator may not achieve the desired cooling effect, so the compressor can be used for cooling. Conversely, when the coolant temperature at the electric drive outlet is low, both the low-temperature radiator and the compressor can meet the cooling requirements; in this case, using the low-temperature radiator is more resource-efficient.

[0074] Furthermore, a certain hysteresis temperature difference can be set when determining the temperature threshold, thereby adjusting the sensitivity of battery thermal management mode recognition. The third and fourth temperature thresholds can also be adjusted according to the actual usage environment and region of the commercial vehicle; this invention does not impose specific limitations on them.

[0075] For example, determining the battery cooling method based on the temperature of the coolant at the electric drive outlet includes:

[0076] If the coolant temperature at the electric drive outlet is greater than or equal to the fifth temperature threshold, it is determined that a compressor should be used for battery cooling.

[0077] If the coolant temperature at the electric drive outlet is below the fifth temperature threshold, a low-temperature radiator will be used for battery cooling.

[0078] Specifically, when determining the cooling method of the battery based on the temperature of the coolant at the electric drive outlet, a temperature threshold can also be set to assist in determining the cooling method.

[0079] For example, the fifth temperature threshold can be set to When the coolant temperature at the electric drive outlet At that time, it can be determined that a compressor is used for battery cooling, and the outlet coolant temperature of the electric drive is... At that time, it can be determined that a low-temperature radiator is used for battery cooling.

[0080] In addition, a sixth temperature threshold, slightly lower than the fifth temperature threshold, can be set as the judgment threshold for using a low-temperature radiator for cooling, thereby reserving a certain temperature margin as a buffer for switching between the compressor and the low-temperature radiator. The fifth temperature threshold can also be adjusted according to the actual use environment and region of the commercial vehicle, and this invention does not impose specific limitations on it.

[0081] For example, determining the battery heating method based on the temperature of the electric drive outlet coolant includes:

[0082] If the coolant temperature at the electric drive outlet is greater than or equal to the lowest single cell temperature of the battery, it is determined that the waste heat from the electric drive will be used to heat the battery.

[0083] If the coolant temperature at the electric drive outlet is lower than the lowest individual cell temperature of the battery, then the battery will be heated using a motor.

[0084] Specifically, when determining the battery heating method based on the coolant temperature at the electric drive outlet, the heating method can be determined in conjunction with the temperature of each individual battery cell. When the coolant temperature at the electric drive outlet is high enough to still provide heating for the battery, there is no need to immediately turn on the motor for heating. Instead, the battery can be heated using the residual heat from the electric drive, thus avoiding waste of resources.

[0085] For example, when the coolant temperature at the electric drive outlet is greater than or equal to the lowest single-cell temperature of the battery, i.e. When the waste heat from the electric drive is used for battery heating, it can be determined that the battery heating will be achieved when the coolant temperature at the electric drive outlet is lower than the lowest single-cell temperature of the battery. At that time, it can be determined that a motor is used to heat the battery.

[0086] For example, the switching between battery thermal management modes is achieved based on the adjustment of a six-way water valve.

[0087] Specifically, the switching between battery thermal management modes can be achieved by adjusting the six-way water valve. Under different thermal management modes, the opening and closing of the six-way water valve can be adjusted accordingly to realize the battery's heat exchange process.

[0088] The following specific application scenario will better illustrate the technical solution of the present invention:

[0089] The commercial vehicle battery thermal management control method provided by this invention can be implemented based on the following commercial vehicle battery thermal management control system, which includes a battery thermal management system, an electric drive thermal management system, a six-way water valve, and a low-temperature radiator. The battery thermal management system includes: a coolant circuit involving the power battery, water pump, expansion tank, and pipelines; and a refrigerant circuit involving a compressor, condenser, fan, plate heat exchanger, electronic expansion valve, and pipelines. The coolant and refrigerant circuits exchange heat through the plate heat exchanger. The battery thermal management system can also be integrated with an air conditioning system, sharing a compressor, condenser, and fan for cooling. The electric drive thermal management system includes: a motor, motor controller, DC-DC converter, water pump, expansion tank, and pipelines. A cooling fan is installed on the low-temperature radiator, which can be integrated with the condenser of the battery thermal management system to form a single unit, thus sharing a single fan.

[0090] The commercial vehicle battery thermal management control method provided by this invention determines the battery thermal management mode based on the ambient temperature, battery temperature, and electric drive outlet coolant temperature. This mode includes battery compressor cooling, battery low-temperature radiator cooling, motor waste heat heating of the battery, and battery temperature equalization self-circulation mode. Then, through a six-way water valve, combined with the battery thermal management mode, it determines whether to dissipate or store heat in the electric drive, maintaining the motor coolant temperature within a suitable range. This allows for rapid response to battery thermal management needs, reducing battery thermal management energy consumption, lowering overall vehicle energy consumption, and minimizing range reduction caused by battery cooling / heating under high / low temperature environments.

[0091] Determining the battery thermal management mode includes:

[0092] 1. When the highest temperature of a single battery cell is ≥ its preset first limit of 35℃ (calibrable), the battery enters cooling mode with a hysteresis temperature difference of -7℃ (calibrable). In cooling mode, the battery is determined to be in compressor cooling mode or low-temperature radiator cooling mode based on the ambient temperature and the coolant temperature at the electric drive outlet. Specifically: when the ambient temperature is ≥ its preset first limit of 15℃ (calibrable), the battery enters compressor cooling mode; when the preset second limit of 0℃ (calibrable) ≤ ambient temperature ≤ preset first limit -5℃ (calibrable), if the coolant temperature at the electric drive outlet is ≥ its preset first limit of 35℃ (calibrable), the battery enters compressor cooling mode; if the coolant temperature at the electric drive outlet is ≤ its preset first limit -5℃ (calibrable), the battery enters low-temperature radiator cooling mode; when the ambient temperature is ≤ its preset second limit -5℃ (calibrable), the compressor cannot start or its efficiency is extremely low at this ambient temperature, and the battery enters low-temperature radiator cooling mode.

[0093] 2. When the lowest temperature of a single battery cell is ≤ its preset second limit of 15℃ (calibrable), the battery enters the heating mode with a hysteresis temperature difference of 10℃ (calibrable). In order to reduce the energy consumption of battery heating, it is necessary to recover the waste heat of the electric drive to heat the battery. Specifically: when the coolant temperature at the outlet of the electric drive is ≥ the lowest battery temperature + 5℃ (calibrable), the battery is heated by the waste heat of the motor; when the coolant temperature at the outlet of the electric drive is ≤ the lowest battery temperature + 0℃ (calibrable), the battery is heated by the waste heat of the motor.

[0094] 3. When the preset second limit of 15℃ (calibrable) < battery cell temperature < preset first limit of 35℃ (calibrable), the battery has no cooling or heating requirements and enters the equal temperature self-circulation mode.

[0095] Combination Figure 2 Let's take a look. Figure 2 This is a schematic diagram of an embodiment of the six-way water valve provided by the present invention. Automatic switching of battery thermal management mode is achieved by adjusting the six-way water valve. The six-way water valve has a total of 6 water ports, of which water ports 1 and 2 are connected to the battery thermal management system, water ports 3 and 4 are connected to the electric drive thermal management system, and water ports 5 and 6 are connected to both ends of the low-temperature radiator.

[0096] The following example illustrates the automatic switching of battery thermal management modes:

[0097] 1. Initially, the ambient temperature is high (>15℃), while the battery temperature is moderate.

[0098] 1.1 The battery enters the temperature equalization self-circulation mode, the six-way water valves 1 and 2 are connected, and valves 3, 4, 5 and 6 are connected. The electric drive thermal management system is connected to the low-temperature radiator, and electric drive heat dissipation is activated.

[0099] 1.2 As the vehicle runs or the battery charges, the battery temperature rises, and the compressor enters the cooling mode. The six-way water valve control is the same as in 1.1, and the electric drive heats up.

[0100] 2. Initially, the ambient temperature is low (0~15℃), and the battery temperature is also low.

[0101] 2.1 When the battery enters the heating mode, the coolant temperature at the electric drive outlet is low, and it cannot enter the motor waste heat heating mode. The six-way water valves 1 and 2 are connected, 3 and 4 are connected, and 5 and 6 are connected, and the electric drive stores heat.

[0102] 2.2 As the electric drive stores heat, the temperature of the coolant at the electric drive outlet rises, and the battery enters the motor waste heat heating mode. When the coolant temperature at the electric drive outlet is ≥ its preset second limit of 45℃ (which can be calibrated), the six-way water valves 1, 2, 3, 4, 5, and 6 are connected to dissipate heat from the electric drive. When the coolant temperature at the electric drive outlet is ≤ the preset second limit of -3℃ (which can be calibrated), the six-way water valves 1, 2, 3, and 4, and 5 and 6 are connected to store heat from the electric drive, maintaining the coolant temperature at the electric drive outlet between the preset second limit of -3℃ and the preset second limit.

[0103] 2.3 As the battery heats up, the battery temperature rises and enters the uniform temperature self-circulation mode. At this time, the coolant temperature at the electric drive outlet is ≥ its preset third limit of 25℃ (which can be calibrated). The six-way water valves 1 and 2 are connected, and the water valves 3, 4, 5, and 6 are connected to dissipate heat from the electric drive. When the coolant temperature at the electric drive outlet is ≤ its preset third limit of -3℃ (which can be calibrated), the six-way water valves are controlled as in 2.1, and the electric drive stores heat to maintain the coolant temperature at the electric drive outlet between the preset third limit of -3℃ and the preset third limit.

[0104] In low-temperature environments, after the battery exits the heating mode and enters the temperature equalization self-circulation mode, the temperature may continue to rise or fall.

[0105] 2.4 If the battery heat generation decreases and the temperature drops, it will re-enter the heating mode. At this time, the coolant temperature at the electric drive outlet is between the preset third limit value -3℃ and the preset third limit value. The battery enters the electric drive waste heat mode. The six-way water valve control is the same as in 2.2, and the electric drive stores heat.

[0106] 2.5 Conversely, if the battery heats up and the temperature rises further, it will enter the cooling mode. At this time, the coolant temperature at the electric drive outlet is between the preset third limit value -3℃ and the preset third limit value. The battery enters the low-temperature radiator cooling mode. The six-way water valves 1, 2, 3, 4, 5, and 6 are connected. The coolant temperature is not high, which can quickly dissipate heat for the battery and electric drive.

[0107] 2.6 When the low-temperature radiator has insufficient heat dissipation capacity and the temperature of the coolant at the electric drive outlet continues to rise, exceeding its preset first limit of 35°C (which can be calibrated), it will automatically switch to the compressor cooling mode to quickly cool the battery. The six-way valve control is the same as in 1.1.

[0108] In this scenario, when the battery is cooled, the low-temperature radiator is used first. When the low-temperature radiator is insufficient, the compressor is switched to cooling, which effectively shortens the compressor running time. At the same time, in order to take into account the battery heating needs, the coolant temperature at the electric drive outlet is maintained between the preset third limit value -3℃ and the preset third limit value. In this way, when the battery needs to be heated, it can quickly enter the motor waste heat heating mode, making the most of the motor waste heat and reducing the overall vehicle energy consumption.

[0109] 3. Initially, the ambient temperature is extremely low (<0℃), and the battery temperature is low.

[0110] 3.1 When the battery enters the heating mode, the coolant temperature at the electric drive outlet is low, and it cannot enter the motor waste heat heating mode. The six-way water valve control is the same as in 2.1, and the electric drive stores heat.

[0111] 3.2 As the electric drive stores heat, the temperature of the coolant at the electric drive outlet rises, and the battery enters the motor waste heat heating mode. The six-way water valve control is the same as in 2.2.

[0112] 3.3 As the battery heats up, the battery temperature rises and enters the uniform temperature self-circulation mode. If the coolant temperature at the electric drive outlet is ≥ its preset third limit of 25℃ (which can be calibrated), the six-way water valves 1 and 2 are connected, and valves 3, 4, 5, and 6 are connected to dissipate heat from the electric drive. If the coolant temperature at the electric drive outlet is ≤ its preset third limit of -3℃ (which can be calibrated), the six-way water valves are controlled as in 2.1, and the electric drive stores heat, maintaining the coolant temperature at the electric drive outlet between the preset third limit of -3℃ and the preset third limit.

[0113] In low-temperature environments, after the battery exits the heating mode and enters the temperature equalization self-circulation mode, the temperature may continue to rise or fall.

[0114] 3.4 If the battery heat generation decreases and the temperature drops, it will re-enter the heating mode. At this time, the coolant temperature at the electric drive outlet is between the preset third limit value -3℃ and the preset third limit value. The battery enters the electric drive waste heat mode, and the six-way water valve control is the same as in 2.2, and the electric drive stores heat.

[0115] 3.5 Conversely, if the battery heats up and the temperature rises further, it will enter the cooling mode. At this time, the coolant temperature at the electric drive outlet is between the preset third limit value -3℃ and the preset third limit value. The battery enters the low-temperature radiator cooling mode, and the six-way water valve control is the same as in 2.5.

[0116] In this scenario, when the battery is cooled, the compressor cannot be used to cool the battery due to the low ambient temperature. Instead, the battery can only be cooled by a low-temperature radiator. At the same time, in order to take into account the battery heating needs, the motor waste heat heating mode can be quickly switched when the battery needs to be heated. Therefore, the temperature of the coolant at the electric drive outlet is maintained between the preset third limit value -3℃ and the preset third limit value to quickly respond to the battery cooling or heating needs.

[0117] The present invention is not limited to the above scenarios when switching thermal management modes. The above scenarios only introduce the switching between battery compressor cooling mode, low temperature radiator cooling mode, uniform temperature self-circulation mode and motor waste heat heating mode.

[0118] This invention addresses both battery heating and cooling needs in low-temperature environments. By maintaining the coolant temperature at the electric drive outlet within a suitable range, it enables rapid switching between low-temperature radiator cooling and motor waste heat heating of the battery, promptly responding to battery thermal management requirements. When ambient and electric drive coolant temperatures permit, the low-temperature radiator is prioritized for battery cooling, reducing compressor operating time and overall vehicle energy consumption while meeting battery cooling requirements. Automatic switching between battery compressor cooling mode, low-temperature radiator cooling mode, and motor waste heat heating mode is achieved via a six-way water valve, resulting in a compact structure and simple control.

[0119] This invention also provides a commercial vehicle battery thermal management control device, combined with... Figure 3 Let's take a look. Figure 3 This is a schematic diagram of an embodiment of the commercial vehicle battery thermal management control device provided by the present invention. The commercial vehicle battery thermal management control device 300 includes:

[0120] The first determining module 301 is used to determine the thermal management mode of the battery based on the temperature of the individual cells of the battery. The thermal management mode of the battery includes a cooling mode, a heating mode, or a temperature equalization self-circulation mode.

[0121] The second determining module 302 is used to determine the cooling method or heating method of the battery based on the temperature of the electric drive outlet coolant and / or the ambient temperature after determining the thermal management mode of the battery.

[0122] The specific implementation methods of each module of the commercial vehicle battery thermal management control device can be found in the description of the above-mentioned commercial vehicle battery thermal management control method, which has similar beneficial effects and will not be repeated here.

[0123] It should be noted that the commercial vehicle battery thermal management control device can be installed in the battery control equipment or in the vehicle control equipment; this invention does not specifically limit it in this regard.

[0124] This invention also provides an electronic device, combined with Figure 4 Let's take a look.Figure 4 This is a schematic diagram of an embodiment of the electronic device provided by the present invention. The electronic device 400 includes a processor 401, a memory 402, and a computer program stored in the memory 402 and executable on the processor 401. When the processor 401 executes the program, it implements the commercial vehicle battery thermal management control method as described above.

[0125] In a preferred embodiment, the electronic device 400 further includes a display 403 for displaying the processor 401 executing the commercial vehicle battery thermal management control method as described above.

[0126] For example, a computer program can be divided into one or more modules / units, one or more of which are stored in memory 402 and executed by processor 401 to complete the present invention. One or more modules / units can be a series of computer program instruction segments capable of performing specific functions, which describe the execution process of the computer program in electronic device 400. For example, the computer program can be divided into a first determining module 301 and a second determining module 302 in the above embodiments. The specific functions of each module are as described above and will not be repeated here.

[0127] Electronic device 400 can be a desktop computer, laptop, PDA, or smartphone with an adjustable camera module.

[0128] The processor 401 may be an integrated circuit chip with signal processing capabilities. The processor 401 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this invention. The general-purpose processor can be a microprocessor or any conventional processor.

[0129] The memory 402 may be, but is not limited to, Random Access Memory (RAM), Read Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), etc. The memory 402 stores programs, and the processor 401 executes these programs upon receiving execution instructions. The process definition method disclosed in any of the foregoing embodiments of the present invention can be applied to the processor 401, or implemented by the processor 401.

[0130] The display 403 can be an LCD screen or an LED screen. For example, a display screen on an in-vehicle device.

[0131] Understandable Figure 4 The structure shown is only a schematic diagram of one possible structure of electronic device 400. Electronic device 400 may also include more than one of the following: Figure 4 Show more or fewer components. Figure 4 The components shown can be implemented using hardware, software, or a combination thereof.

[0132] The electronic device provided by the above embodiments of the present invention can be implemented with reference to the content specifically described in the present invention regarding the commercial vehicle battery thermal management control method, and has similar beneficial effects to the commercial vehicle battery thermal management control method described above, which will not be repeated here.

[0133] This invention also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the commercial vehicle battery thermal management control method as described above.

[0134] Generally, computer instructions for implementing the methods of the present invention can be carried on any combination of one or more computer-readable storage media. Non-transitory computer-readable storage media can include any computer-readable medium except for signals themselves that are temporarily propagating.

[0135] Computer-readable storage media can be, for example—but not limited to—electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatuses, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in connection with an instruction execution system, apparatus, or device.

[0136] Computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof. Programming languages ​​include object-oriented programming languages—such as Java, Smalltalk, and C++—as well as conventional procedural programming languages—such as the "C" language or similar programming languages. In particular, Python, suitable for neural network computation, and platform frameworks such as TensorFlow and PyTorch can be used. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0137] Those skilled in the art will understand that all or part of the processes of the methods described in the above embodiments can be implemented by a computer program instructing related hardware, and the program can be stored in a computer-readable storage medium. The computer-readable storage medium may be a disk, optical disk, read-only memory, or random access memory, etc.

[0138] This invention discloses a method, device, electronic equipment, and storage medium for thermal management control of commercial vehicle batteries. First, the individual cell temperatures of all batteries are acquired. Then, based on the individual cell temperatures, the thermal management mode of the battery is determined to be one of heating, cooling, or isothermal self-circulation mode, thus clarifying the battery's thermal management requirements. Next, based on the coolant temperature at the electric drive outlet and / or the ambient temperature, the cooling or heating method of the battery is further determined. This allows for more targeted implementation of the battery's thermal management requirements based on the current temperature state of the battery and the environmental conditions, identifying a more resource-efficient cooling or heating method. This invention, while fulfilling the battery's thermal management control requirements, also considers external temperature factors to determine a more targeted battery thermal management method, thereby improving the efficiency of battery thermal management control, avoiding resource waste, and saving implementation costs.

[0139] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for thermal management control of commercial vehicle batteries, characterized in that, include: Based on the temperature of a single battery cell, the thermal management mode of the battery is determined. The thermal management mode of the battery includes cooling mode, heating mode, or isothermal self-circulation mode. After determining the battery's thermal management mode, the cooling or heating method of the battery is determined based on the electric drive outlet coolant temperature and / or ambient temperature. When the highest single cell temperature of the battery is greater than or equal to the first temperature threshold, the thermal management mode of the battery is determined to be cooling mode. When the lowest single cell temperature of the battery is less than or equal to the second temperature threshold, the thermal management mode of the battery is determined to be the heating mode. When the temperature of each individual cell of the battery is greater than the second temperature threshold and less than the first temperature threshold, the thermal management mode of the battery is determined to be the equal-temperature self-circulation mode. Among them, the first temperature threshold is greater than the second temperature threshold; If the battery's thermal management mode is determined to be cooling mode, the cooling method of the battery is determined based on the electric drive outlet coolant temperature and the ambient temperature. When the battery's thermal management mode is determined to be heating mode, the heating method of the battery is determined based on the temperature of the coolant at the electric drive outlet. The method of determining the battery cooling mode based on the electric drive outlet coolant temperature and ambient temperature includes: When the ambient temperature is greater than or equal to the third temperature threshold, it is determined that a compressor should be used for battery cooling. When the ambient temperature is less than or equal to the fourth temperature threshold, it is determined that a low-temperature radiator should be used for battery cooling. When the ambient temperature is greater than the fourth temperature threshold and less than the third temperature threshold, the cooling method of the battery is determined based on the temperature of the coolant at the electric drive outlet. Among them, the third temperature threshold is greater than the fourth temperature threshold; The battery cooling method based on the temperature of the coolant at the electric drive outlet includes: If the coolant temperature at the electric drive outlet is greater than or equal to the fifth temperature threshold, it is determined that a compressor should be used for battery cooling. When the coolant temperature at the electric drive outlet is less than the fifth temperature threshold, it is determined that a low-temperature radiator will be used for battery cooling. The method for determining the battery heating based on the temperature of the coolant at the electric drive outlet includes: If the coolant temperature at the electric drive outlet is greater than or equal to the lowest single cell temperature of the battery, it is determined that the waste heat from the electric drive will be used to heat the battery. If the coolant temperature at the electric drive outlet is lower than the lowest single cell temperature of the battery, then it is determined that the battery will be heated by a motor. The switching between battery thermal management modes is achieved by adjusting the six-way water valve.

2. A commercial vehicle battery thermal management control device, characterized in that, include: The first determining module is used to determine the thermal management mode of the battery based on the temperature of the individual cells of the battery. The thermal management mode of the battery includes a cooling mode, a heating mode, or a temperature equalization self-circulation mode. The second determining module is used to determine the cooling or heating method of the battery based on the electric drive outlet coolant temperature and / or ambient temperature after determining the battery's thermal management mode. When the highest single cell temperature of the battery is greater than or equal to the first temperature threshold, the thermal management mode of the battery is determined to be cooling mode. When the lowest single cell temperature of the battery is less than or equal to the second temperature threshold, the thermal management mode of the battery is determined to be the heating mode. When the temperature of each individual cell of the battery is greater than the second temperature threshold and less than the first temperature threshold, the thermal management mode of the battery is determined to be the equal-temperature self-circulation mode. Among them, the first temperature threshold is greater than the second temperature threshold; If the battery's thermal management mode is determined to be cooling mode, the cooling method of the battery is determined based on the electric drive outlet coolant temperature and the ambient temperature. When the battery's thermal management mode is determined to be heating mode, the heating method of the battery is determined based on the temperature of the coolant at the electric drive outlet. The method of determining the battery cooling mode based on the electric drive outlet coolant temperature and ambient temperature includes: When the ambient temperature is greater than or equal to the third temperature threshold, it is determined that a compressor should be used for battery cooling. When the ambient temperature is less than or equal to the fourth temperature threshold, it is determined that a low-temperature radiator should be used for battery cooling. When the ambient temperature is greater than the fourth temperature threshold and less than the third temperature threshold, the cooling method of the battery is determined based on the temperature of the coolant at the electric drive outlet. Among them, the third temperature threshold is greater than the fourth temperature threshold; The battery cooling method based on the temperature of the coolant at the electric drive outlet includes: If the coolant temperature at the electric drive outlet is greater than or equal to the fifth temperature threshold, it is determined that a compressor should be used for battery cooling. When the coolant temperature at the electric drive outlet is less than the fifth temperature threshold, it is determined that a low-temperature radiator will be used for battery cooling. The method for determining the battery heating based on the temperature of the coolant at the electric drive outlet includes: If the coolant temperature at the electric drive outlet is greater than or equal to the lowest single cell temperature of the battery, it is determined that the waste heat from the electric drive will be used to heat the battery. If the coolant temperature at the electric drive outlet is lower than the lowest single cell temperature of the battery, then it is determined that the battery will be heated by a motor. The switching between battery thermal management modes is achieved by adjusting the six-way water valve.

3. An electronic device, characterized in that, It includes a memory and a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the commercial vehicle battery thermal management control method according to claim 1.

4. A computer-readable storage medium, characterized in that, It stores a computer program, which, when executed by a processor, implements the commercial vehicle battery thermal management control method as described in claim 1.

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