Control method and device of thermal management system and mine car

Abstract

The invention discloses a control method and device of a thermal management system and a mine car, the thermal management system is applied to the mine car, the mine car comprises a power battery, the power battery comprises at least one battery pack, and the control method comprises the following steps: acquiring temperature information corresponding to a plurality of temperature measurement points of the battery pack; determining temperature data of the power battery according to the multiple pieces of temperature information; adjusting the valve opening degree of the thermal management system according to the temperature data and preset temperature information of the thermal management system; wherein the preset temperature information comprises a preset highest temperature, a preset lowest temperature and a preset temperature difference value. According to the control method of the thermal management system, the highest temperature and the lowest temperature of the power battery serve as parameters of the thermal management system, the temperature difference of the power battery serves as the parameters of the thermal management system, control of the thermal management system is more accurate, and meanwhile energy consumption of the thermal management system can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of battery control, and in particular to a control method and device for a thermal management system and a mining car. Background Art

[0002] The existing thermal management solutions for mining cars can only cool or heat the power batteries by identifying the highest or lowest temperature of the power batteries inside the mining cars, and read fewer relevant parameters. However, the life and optimal working state of the power batteries cannot only focus on the highest or lowest temperature. The temperature difference is also an important parameter. The current thermal management solutions for mining cars do not monitor the temperature difference. When the power battery reaches a specific threshold temperature, thermal management starts to start. When the thermal management really takes effect, the power battery temperature has exceeded the threshold temperature, which makes it difficult to ensure that the power battery works within the optimal temperature range, and will increase the energy consumption of the power battery thermal management. At the same time, it is difficult to ensure the reliability of the power battery and the entire vehicle. Summary of the invention

[0003] The present invention provides a control method, device and mining car for a thermal management system, which adjusts the opening of the thermal management system valve by adjusting the maximum temperature, minimum temperature and temperature difference of the power battery, thereby making the thermal management system more accurately controlled and reducing the energy consumption of the thermal management system when it is turned on.

[0004] According to a first aspect of the present invention, a control method for a thermal management system is provided. The thermal management system is applied to a mine car. The mine car includes a power battery. The power battery includes at least one battery pack. The control method includes:

[0005] Obtaining temperature information corresponding to multiple temperature measurement points of the battery pack;

[0006] Determining temperature data of the power battery according to the plurality of temperature information;

[0007] The valve opening of the thermal management system is adjusted according to the temperature data and preset temperature information of the thermal management system; wherein the preset temperature information includes a preset maximum temperature, a preset minimum temperature and a preset temperature difference.

[0008] Optionally, obtaining temperature information corresponding to multiple temperature measurement points of the battery pack includes:

[0009] Determining n temperature measurement points of the battery pack;

[0010] The corresponding n temperature information is determined according to the temperature measurement points and recorded as T1~T n ; Wherein, n is a positive integer greater than 1.

[0011] Optionally, determining the temperature data of the power battery according to the plurality of temperature information includes:

[0012] Determine the maximum temperature T of the power battery according to the n temperature data max , minimum temperature T min and the first temperature difference T max -T min ; Among them, T max and T min All T1~T n The value in .

[0013] Optionally, adjusting the valve opening of the thermal management system according to the temperature data and preset temperature information of the thermal management system includes:

[0014] When a first difference between the preset temperature difference and the first temperature difference is less than 0, and the first difference increases, reducing the valve opening of the thermal management system;

[0015] When a first difference between the preset temperature difference and the first temperature difference is less than 0, and the first difference decreases, the valve opening of the thermal management system is increased.

[0016] Optionally, adjusting the valve opening of the thermal management system according to the temperature data and preset temperature information of the thermal management system includes:

[0017] When a second difference between the preset maximum temperature and the maximum temperature is less than 0, and the second difference increases, reducing the valve opening of the thermal management system;

[0018] When a second difference between the preset maximum temperature and the maximum temperature is less than 0, and the second difference decreases, the valve opening of the thermal management system is increased.

[0019] Optionally, adjusting the valve opening of the thermal management system according to the temperature data and preset temperature information of the thermal management system includes:

[0020] When a third difference between the preset minimum temperature and the minimum temperature is greater than 0, and the third difference decreases, reducing the valve opening of the thermal management system;

[0021] When a third difference between the preset minimum temperature and the minimum temperature is greater than 0, and the third difference increases, the valve opening of the thermal management system is increased.

[0022] Optionally, before obtaining the temperature information corresponding to the multiple temperature measurement points of the battery pack, the method includes:

[0023] Obtaining historical operation data of the mine car;

[0024] Determining a pre-operation condition of the mine car according to the historical operation data;

[0025] Determining a state of charge of the power battery according to the pre-operating condition;

[0026] The thermal management system is controlled to be turned on or off according to the charge state.

[0027] Optionally, controlling the thermal management system to be turned on or off according to the state of charge includes:

[0028] When the state of charge is greater than or equal to a first threshold, turning on the thermal management system;

[0029] When the state of charge is less than a first threshold, the thermal management system is turned off.

[0030] According to a second aspect of the present invention, a control device for a thermal management system is provided, wherein the thermal management system is applied to a mine car, wherein the mine car comprises a power battery, wherein the power battery comprises at least one battery pack, and wherein the device comprises:

[0031] An acquisition module, used to acquire temperature information corresponding to multiple temperature measurement points of the battery pack;

[0032] A temperature data determination module, used to determine the temperature data of the power battery according to the plurality of temperature information;

[0033] An adjustment module is used to adjust the valve opening of the thermal management system according to the temperature data and preset temperature information of the thermal management system; wherein the preset temperature information includes a preset maximum temperature, a preset minimum temperature and a preset temperature difference.

[0034] According to a third aspect of the present invention, there is provided a mining vehicle, comprising: a thermal management system, and a control device of the thermal management system according to the second aspect.

[0035] The present invention discloses a control method, device and mine car of a thermal management system. The thermal management system is applied to a mine car. The mine car includes a power battery. The power battery includes at least one battery pack. The control method includes: obtaining temperature information corresponding to multiple temperature measurement points of the battery pack; determining the temperature data of the power battery according to multiple temperature information; adjusting the valve opening of the thermal management system according to the temperature data and the preset temperature information of the thermal management system; wherein the preset temperature information includes a preset maximum temperature, a preset minimum temperature and a preset temperature difference. The control method of the thermal management system provided by the present invention not only uses the maximum temperature and the minimum temperature of the power battery as parameters of the thermal management system, but also uses the temperature difference of the power battery as a parameter of the thermal management system, so that the thermal management system can be controlled more accurately and the energy consumption of the thermal management system can be reduced at the same time.

[0036] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 It is a flow chart of a control method of a thermal management system in a mine car in the prior art;

[0039] Figure 2 is a flow chart of a control method of a thermal management system provided by an embodiment of the present invention;

[0040] Figure 3 is a flow chart of a control method of a thermal management system of a first alternative embodiment provided by an embodiment of the present invention;

[0041] Figure 4 is a flow chart of a control method of a thermal management system of a second alternative embodiment provided by an embodiment of the present invention;

[0042] Figure 5 is a flow chart of a control method of a thermal management system of a third alternative embodiment provided by an embodiment of the present invention;

[0043] Figure 6 is a flow chart of a control method of a thermal management system according to a fourth alternative embodiment provided by an embodiment of the present invention;

[0044] Figure 7 is a flow chart of a control method of a thermal management system according to a fifth alternative embodiment provided by an embodiment of the present invention;

[0045] Figure 8 is a flow chart of a control method of a thermal management system according to a sixth alternative embodiment provided by an embodiment of the present invention;

[0046] Fig. 9 is a flow chart of a control method of a thermal management system according to a seventh alternative embodiment provided by an embodiment of the present invention;

[0047] Fig.10 It is a block diagram of a control device of a thermal management system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0049] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0050] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0051] Figure 1 This is a flow chart of the control method of the thermal management system in a mine car in the prior art. The new energy mine car is different from the traditional fuel mine car. The new energy mine car is a mining dump truck that uses new energy technology as a power source. It includes power batteries and other components. See Figure 1 , control methods include:

[0052] S100: Detect the temperature t of the power battery.

[0053] Among them, the power battery refers to an important component that provides power and security for the mine car, and is composed of multiple different battery packs.

[0054] Specifically, the temperature t of the power battery is detected by a temperature sensor.

[0055] S200, t≥maximum temperature threshold.

[0056] Specifically, when the detected temperature t is greater than or equal to the preset maximum temperature threshold, step S400 is executed, and when the detected temperature t is less than the preset maximum temperature threshold, the process returns to step S100.

[0057] S300, t≤minimum temperature threshold.

[0058] Specifically, when the detected temperature t is less than or equal to a preset minimum temperature threshold, step S500 is executed, and when the detected temperature t is greater than a preset maximum temperature threshold, the process returns to step S100.

[0059] S400, the thermal management system starts cooling.

[0060] Among them, the thermal management system is a system that ensures that the power battery operates within the optimal temperature range, which can optimize the functional capabilities of the power battery, thereby extending the life of the power battery and improving work efficiency.

[0061] S500: The thermal management system starts heating.

[0062] From the above, it can be seen that in the prior art, the heating or cooling of the thermal management system usually requires startup time. When the thermal management system actually realizes heating or cooling, the temperature of the power battery has exceeded the maximum temperature or the minimum temperature, which can easily cause the operating temperature of the power battery to be too high or too low, making it difficult to ensure that the power battery operates within the optimal temperature range, and also leading to an increase in the energy consumption of the thermal management system.

[0063] In order to solve the technical problems existing in the prior art, Figure 2 is a flow chart of a control method of a thermal management system provided by an embodiment of the present invention. An embodiment of the present invention provides a control method of a thermal management system applied to a mine car. The thermal management system includes a power battery, and the power battery includes at least one battery pack. Figure 2 , control methods include:

[0064] S1. Obtain temperature information corresponding to multiple temperature measurement points of the battery pack.

[0065] Among them, the temperature measurement point is an important part of the battery pack, reflecting the temperature of the battery pack. The battery pack includes multiple temperature measurement points in different positions. Usually, the position that best reflects the battery temperature condition is selected in the battery pack, such as the surface of the battery pack cell, the center of the battery module, or the inlet and outlet of the coolant.

[0066] Specifically, a temperature sensor is used to monitor and obtain multiple temperature information of multiple temperature measurement points in the battery pack in real time, and the multiple temperature information corresponds to the multiple temperature measurement points one by one.

[0067] S2. Determine temperature data of the power battery according to the plurality of temperature information.

[0068] Specifically, the power battery is composed of a plurality of battery packs, and the temperature data of the power battery is determined through the plurality of temperature information acquired in the above step S1.

[0069] S3. Adjust the valve opening of the thermal management system according to the temperature data and preset temperature information of the thermal management system, wherein the preset temperature information includes a preset maximum temperature, a preset minimum temperature and a preset temperature difference.

[0070] Among them, the thermal management system includes liquid cooling, air cooling, direct cooling and other methods. For example, the thermal management system in the embodiment of the present invention uses liquid cooling to achieve heating or cooling of the power battery, and the embodiment of the present invention does not limit this. The valve opening refers to the three-way valve in the thermal management system that changes the flow direction and flow speed of the coolant to achieve targeted heating or cooling of different parts of the battery pack.

[0071] Specifically, the valve opening of the thermal management system is adjusted according to the temperature data obtained in the above step S2 and the temperature information preset by the thermal management system. The preset temperature information is usually temperature information preset according to needs. When the temperature of the power battery reaches the preset temperature information, the thermal management system turns on the heating or cooling function, wherein the preset temperature information includes a preset maximum temperature, a preset minimum temperature and a preset temperature difference, and the preset temperature difference is calculated by subtracting the preset minimum temperature from the preset maximum temperature.

[0072] The control method of the thermal management system provided in the embodiment of the present invention not only uses the maximum temperature and the minimum temperature of the power battery as parameters of the thermal management system, but also uses the temperature difference of the power battery as a parameter of the thermal management system, so that the thermal management system can be controlled more accurately and the energy consumption of the thermal management system can be reduced.

[0073] Based on the above embodiment, this embodiment further refines the acquisition of temperature information corresponding to multiple temperature measurement points of the battery pack. Figure 3 is a flow chart of a control method of a thermal management system according to a first alternative embodiment of the present invention, with reference to Figure 3 , the control method of the present application comprises the following steps:

[0074] S11. Determine n temperature measurement points of the battery pack.

[0075] Specifically, multiple locations on the battery pack that can best reflect the temperature condition of the battery pack are found as n temperature measurement points of the battery pack, illustratively, the surface of the battery pack monomer, the center of the battery module, or the inlet and outlet of the coolant.

[0076] S12, determine the corresponding n temperature information according to the temperature measurement points and record them as T1~T n ; Wherein, n is a positive integer greater than 1.

[0077] Specifically, according to n temperature measurement points, each temperature measurement point corresponds to a temperature T. Since there are multiple battery packs, each battery pack has n temperature measurement points, so each temperature information is recorded as T1~T n ; n is a positive integer greater than 1.

[0078] S202: Determine temperature data of the power battery according to a plurality of temperature information.

[0079] S203, adjusting the valve opening of the thermal management system according to the temperature data and preset temperature information of the thermal management system, wherein the preset temperature information includes a preset maximum temperature, a preset minimum temperature and a preset temperature difference.

[0080] Based on the above embodiment, this embodiment further refines the acquisition of temperature information corresponding to multiple temperature measurement points of the battery pack. Figure 4 is a flow chart of a control method of a thermal management system according to a second alternative embodiment of the present invention, with reference to Figure 4 , the control method of the present application comprises the following steps:

[0081] S21. Determine n temperature measurement points of the battery pack.

[0082] S22, determine the corresponding n temperature information according to the temperature measurement points and record them as T1~T n ; Wherein, n is a positive integer greater than 1.

[0083] S301, determining the maximum temperature T of the power battery according to n temperature data max , minimum temperature T min and the first temperature difference T max -T min ; Among them, T max and T min All T1~T n The value in .

[0084] Specifically, the multiple temperature information T1~T determined in the above step S22 n , collect the data into a group and obtain the highest temperature T in the reorganized data max and the minimum temperature T min , using the highest temperature T max Subtract the minimum temperature T min The first temperature difference of the entire power battery can be obtained.

[0085] S302. Adjust the valve opening of the thermal management system according to the temperature data and preset temperature information of the thermal management system, wherein the preset temperature information includes a preset maximum temperature, a preset minimum temperature, and a preset temperature difference.

[0086] Based on the above embodiment, this embodiment further refines the acquisition of temperature information corresponding to multiple temperature measurement points of the battery pack. Figure 5 is a flow chart of a control method of a thermal management system according to a third alternative embodiment of the present invention, with reference to Figure 5 , the control method of the present application comprises the following steps:

[0087] S401. Obtain temperature information corresponding to multiple temperature measurement points of a battery pack.

[0088] S402: Determine the maximum temperature T of the power battery according to n temperature data max , minimum temperature T min and the first temperature difference T max -T min ; Among them, T max and T min All T1~T n The value in .

[0089] S403, adjusting the valve opening of the thermal management system according to the temperature data and preset temperature information of the thermal management system, wherein the preset temperature information includes a preset maximum temperature, a preset minimum temperature and a preset temperature difference.

[0090] S404: Compare the preset temperature difference with the first temperature difference.

[0091] Specifically, when the first difference value of the comparison result is less than 0 and increases, step S4041 is executed; when the first difference value of the comparison result is less than 0 and decreases, step S4042 is executed.

[0092] S4041. When a first difference between the preset temperature difference and the first temperature difference is less than 0, and the first difference increases, reduce the valve opening of the thermal management system.

[0093] Specifically, when the first difference between the preset temperature difference and the first temperature difference is less than 0, that is, it is detected that the current temperature difference of the power battery is greater than the temperature difference preset by the thermal management system, indicating that thermal management control of the power battery is required at this moment, and when the first difference increases, it proves that the temperature difference has changed significantly after the thermal management system is turned on. At this time, the opening of the three-way valve of the thermal management system is reduced to reduce the energy consumption of the thermal management system.

[0094] S4042: When a first difference between the preset temperature difference and the first temperature difference is less than 0, and the first difference decreases, increase the valve opening of the thermal management system.

[0095] Specifically, when the first difference between the preset temperature difference and the first temperature difference is less than 0, that is, it is detected that the current temperature difference of the power battery is greater than the temperature difference preset by the thermal management system, indicating that thermal management control of the power battery is required at this moment, and when the first difference decreases, it proves that the temperature difference has not changed significantly after the thermal management system is turned on. The expected effect of the thermal management system may be poor due to the influence of the external ambient temperature. At this time, in order to achieve better heating or cooling effects, it is necessary to increase the opening of the three-way valve of the thermal management system so that the temperature of the power battery can be better restored to the optimal temperature range to ensure the normal operation of the mine car.

[0096] Based on the above embodiment, this embodiment further refines the acquisition of temperature information corresponding to multiple temperature measurement points of the battery pack. Figure 6 is a flow chart of a control method of a thermal management system according to a fourth alternative embodiment of the present invention, with reference to Figure 6 , the control method of the present application comprises the following steps:

[0097] S501. Obtain temperature information corresponding to multiple temperature measurement points of a battery pack.

[0098] S502: Determine the maximum temperature T of the power battery according to n temperature data. max , minimum temperature T min and the first temperature difference T max -T min ; Among them, T max and T min All T1~T n The value in .

[0099] S503, adjusting the valve opening of the thermal management system according to the temperature data and preset temperature information of the thermal management system, wherein the preset temperature information includes a preset maximum temperature, a preset minimum temperature and a preset temperature difference.

[0100] S504: Compare the preset maximum temperature with the maximum temperature.

[0101] Specifically, when the second difference value of the comparison result is less than 0 and increases, step S5041 is executed; when the second difference value of the comparison result is less than 0 and decreases, step S5042 is executed.

[0102] S5041. When the second difference between the preset maximum temperature and the maximum temperature is less than 0, and the second difference increases, reduce the valve opening of the thermal management system.

[0103] Specifically, when the second difference between the preset maximum temperature and the maximum temperature is less than 0, that is, it is detected that the current maximum temperature of the power battery is greater than the maximum temperature preset by the thermal management system, indicating that thermal management control of the power battery (that is, cooling the power battery) is required at this moment, and when the second difference increases, it proves that the maximum temperature has dropped significantly after the thermal management system is turned on. At this time, the opening of the three-way valve of the thermal management system is reduced to reduce the energy consumption of the thermal management system.

[0104] S5042: When the second difference between the preset maximum temperature and the maximum temperature is less than 0, and the second difference decreases, increase the valve opening of the thermal management system.

[0105] Specifically, when the second difference between the preset maximum temperature and the maximum temperature is less than 0, that is, it is detected that the current maximum temperature of the power battery is greater than the maximum temperature preset by the thermal management system, indicating that thermal management control of the power battery (that is, cooling the power battery) is required at this moment, and when the second difference decreases, it proves that the maximum temperature has not dropped significantly after the thermal management system is turned on or the rate of drop is too slow. The expected effect of the thermal management system may be poor due to the influence of the external ambient temperature. At this time, in order to achieve a better cooling effect, it is necessary to increase the opening of the three-way valve of the thermal management system so that the temperature of the power battery can drop quickly to better restore to the optimal temperature range to ensure the normal operation of the mine car.

[0106] Based on the above embodiment, this embodiment further refines the acquisition of temperature information corresponding to multiple temperature measurement points of the battery pack. Figure 7 is a flow chart of a control method of a thermal management system according to a fifth alternative embodiment of the present invention, with reference to Figure 7 , the control method of the present application comprises the following steps:

[0107] S601. Obtain temperature information corresponding to multiple temperature measurement points of a battery pack.

[0108] S602: Determine the maximum temperature T of the power battery according to n temperature data. max , minimum temperature T min and the first temperature difference T max -T min ; Among them, T max and T min All T1~T n The value in .

[0109] S603, adjusting the valve opening of the thermal management system according to the temperature data and preset temperature information of the thermal management system, wherein the preset temperature information includes a preset maximum temperature, a preset minimum temperature and a preset temperature difference.

[0110] S604: Compare the preset minimum temperature with the minimum temperature.

[0111] Specifically, when the third difference value of the comparison result is greater than 0 and decreases, step S6041 is executed; when the third difference value of the comparison result is greater than 0 and increases, step S6042 is executed.

[0112] S6041. When a third difference between the preset minimum temperature and the minimum temperature is greater than 0, and the third difference decreases, reduce the valve opening of the thermal management system.

[0113] Specifically, when the third difference between the preset minimum temperature and the minimum temperature is greater than 0, that is, it is detected that the current minimum temperature of the power battery is lower than the minimum temperature preset by the thermal management system, indicating that thermal management control of the power battery is required at this moment (that is, heating the power battery), and when the third difference decreases, it proves that the minimum temperature has increased significantly after the thermal management system is turned on. At this time, the opening of the three-way valve of the thermal management system is reduced to reduce the energy consumption of the thermal management system.

[0114] S6042: When a third difference between the preset minimum temperature and the minimum temperature is greater than 0, and the third difference increases, increase the valve opening of the thermal management system.

[0115] Specifically, when the third difference between the preset minimum temperature and the minimum temperature is greater than 0, that is, it is detected that the current minimum temperature of the power battery is lower than the minimum temperature preset by the thermal management system, indicating that thermal management control of the power battery (i.e., heating the power battery) is required at this moment, and when the third difference increases, it proves that the minimum temperature has not risen significantly after the thermal management system is turned on or the rising rate is too slow. The expected effect of the thermal management system may be poor due to the influence of the external ambient temperature. At this time, in order to achieve a better heating effect, it is necessary to increase the opening of the three-way valve of the thermal management system so that the temperature of the power battery can rise quickly to better restore to the optimal temperature range to ensure the normal operation of the mine car.

[0116] Figure 8 is a flow chart of a control method of a thermal management system according to a sixth alternative embodiment of the present invention. Optionally, before obtaining temperature information corresponding to multiple temperature measurement points of a battery pack, refer to Figure 8 , control methods include:

[0117] S601, obtaining historical operation data of the mine car.

[0118] Among them, historical operation data refers to the operation trajectory of the mine car in the previous stage, including but not limited to climbing, cruising and downhill.

[0119] Specifically, the historical operation data of the mine car is obtained through a storage data unit in the mine car.

[0120] S602. Determine the pre-operation condition of the mine car according to historical operation data.

[0121] Specifically, the current operating condition of the mine car is predicted in advance based on the historical operating data of the mine car obtained in the above step S601.

[0122] S603: Determine the state of charge of the power battery according to the pre-operation condition.

[0123] Among them, the state of charge (SOC) refers to the available state of the remaining charge in the power battery, indicating the remaining power information of the power battery.

[0124] Specifically, the remaining power information of the power battery for executing the current operating condition is calculated based on the operating condition of the mine car predicted in advance.

[0125] S604: Control the thermal management system to be turned on or off according to the state of charge.

[0126] Specifically, whether the thermal management system meets the start-up condition is controlled according to the calculated charge state of the power battery.

[0127] Based on the above embodiments, the embodiments of the present invention further refine the control of opening or closing of the thermal management system according to the state of charge. Fig. 9 is a flow chart of a control method of a thermal management system according to a seventh alternative embodiment of the present invention, see Fig. 9 , control methods include:

[0128] S701. Obtain historical operation data of the mine car.

[0129] S702. Determine the pre-operation condition of the mine car according to historical operation data.

[0130] S703: Determine the state of charge of the power battery according to the pre-operation condition.

[0131] S704: Compare the state of charge with a first threshold.

[0132] Specifically, when the state of charge is greater than or equal to the first threshold, step S7041 is executed; when the state of charge is less than the first threshold, step S7042 is executed.

[0133] S7041. When the state of charge is greater than or equal to a first threshold, start the thermal management system.

[0134] Specifically, the power supply of the power battery is provided by the power battery. When the remaining power of the power battery is greater than or equal to the first threshold, it indicates that the power battery currently has sufficient power reserve to start the thermal management system.

[0135] S7042: When the state of charge is less than a first threshold, shut down the thermal management system.

[0136] Specifically, when the remaining power of the power battery is less than the first threshold, it indicates that the power battery does not currently have sufficient power reserve, and therefore, the thermal management system needs to be shut down at this moment.

[0137] According to the same inventive concept, Fig.10 is a block diagram of a control device of a thermal management system provided by an embodiment of the present invention, with reference to Fig.10 The embodiment of the present invention provides a control device for a thermal management system, the thermal management system is applied to a mine car, the mine car includes a power battery, the power battery includes at least one battery pack, and the device includes:

[0138] Acquisition module 1, used to obtain temperature information corresponding to multiple temperature measurement points of the battery pack;

[0139] A temperature data determination module 2 is used to determine the temperature data of the power battery according to a plurality of temperature information;

[0140] The regulating module 3 is used to regulate the valve opening of the thermal management system according to the temperature data and the preset temperature information of the thermal management system; wherein the preset temperature information includes a preset maximum temperature, a preset minimum temperature and a preset temperature difference.

[0141] A control device for a thermal management system provided in an embodiment of the present invention can achieve the same technical effect as a control method for a thermal management system provided in the above-mentioned embodiment of the invention, which will not be described in detail here.

[0142] According to the same inventive concept, an embodiment of the present invention provides a mining vehicle, including: a thermal management system, and a control device of the thermal management system in the above embodiment.

[0143] A mining car provided by an embodiment of the present invention can achieve the same technical effect as a control device of a thermal management system provided by the above-mentioned embodiment of the invention, which will not be described in detail here.

[0144] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A control method for a thermal management system, characterized in that: The thermal management system is applied to a mine car, the mine car includes a power battery, the power battery includes at least one battery pack, and the control method includes: Obtaining temperature information corresponding to multiple temperature measurement points of the battery pack; Determining temperature data of the power battery according to the plurality of temperature information; The valve opening of the thermal management system is adjusted according to the temperature data and preset temperature information of the thermal management system; wherein the preset temperature information includes a preset maximum temperature, a preset minimum temperature and a preset temperature difference.

2. The control method of the thermal management system according to claim 1, characterized in that: Obtaining temperature information corresponding to multiple temperature measurement points of the battery pack, including: Determining n temperature measurement points of the battery pack; The corresponding n temperature information is determined according to the temperature measurement points and recorded as T1~T n ; Wherein, n is a positive integer greater than 1.

3. The control method of the thermal management system according to claim 2, characterized in that: Determining the temperature data of the power battery according to the plurality of temperature information; comprising: Determine the maximum temperature T of the power battery according to the n temperature data max , minimum temperature T min and the first temperature difference T max -T min ; Among them, T max and T min All T1~T n The value in .

4. The control method of the thermal management system according to claim 3, characterized in that: Adjusting the valve opening of the thermal management system according to the temperature data and the preset temperature information of the thermal management system includes: When a first difference between the preset temperature difference and the first temperature difference is less than 0, and the first difference increases, reducing the valve opening of the thermal management system; When a first difference between the preset temperature difference and the first temperature difference is less than 0, and the first difference decreases, the valve opening of the thermal management system is increased.

5. The control method of the thermal management system according to claim 3, characterized in that: Adjusting the valve opening of the thermal management system according to the temperature data and the preset temperature information of the thermal management system includes: When a second difference between the preset maximum temperature and the maximum temperature is less than 0, and the second difference increases, reducing the valve opening of the thermal management system; When a second difference between the preset maximum temperature and the maximum temperature is less than 0, and the second difference decreases, the valve opening of the thermal management system is increased.

6. The control method of the thermal management system according to claim 3, characterized in that: Adjusting the valve opening of the thermal management system according to the temperature data and the preset temperature information of the thermal management system includes: When a third difference between the preset minimum temperature and the minimum temperature is greater than 0, and the third difference decreases, reducing the valve opening of the thermal management system; When a third difference between the preset minimum temperature and the minimum temperature is greater than 0, and the third difference increases, the valve opening of the thermal management system is increased.

7. The control method of the thermal management system according to claim 1, characterized in that: Before obtaining the temperature information corresponding to the multiple temperature measurement points of the battery pack, the method includes: Obtaining historical operation data of the mine car; Determining a pre-operation condition of the mine car according to the historical operation data; Determining a state of charge of the power battery according to the pre-operating condition; The thermal management system is controlled to be turned on or off according to the charge state.

8. The control method of the thermal management system according to claim 7, characterized in that: Controlling the thermal management system to be turned on or off according to the state of charge includes: When the state of charge is greater than or equal to a first threshold, turning on the thermal management system; When the state of charge is less than a first threshold, the thermal management system is turned off.

9. A control device for a thermal management system, characterized in that: The thermal management system is applied to a mine car, the mine car includes a power battery, the power battery includes at least one battery pack, and the device includes: An acquisition module, used to acquire temperature information corresponding to multiple temperature measurement points of the battery pack; A temperature data determination module, used to determine the temperature data of the power battery according to the plurality of temperature information; An adjustment module is used to adjust the valve opening of the thermal management system according to the temperature data and preset temperature information of the thermal management system; wherein the preset temperature information includes a preset maximum temperature, a preset minimum temperature and a preset temperature difference.

10. A mining car, characterized in that: include: A thermal management system, and a control device for the thermal management system as claimed in claim 9.

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