A control method, device and system for vehicle-mounted battery

Abstract

The embodiments of the present application provide a control method, device and system for a vehicle battery. When executing the control method for a vehicle battery provided in the embodiments of the present application, the control device may first obtain the temperature of the vehicle battery. Then, the control device determines whether the temperature of the vehicle battery is in the first temperature range. If the temperature of the vehicle battery is in the first temperature range, it means that the vehicle battery may need to be heated to reach a temperature with higher discharge efficiency. Then the control device may further obtain the discharge parameters of the vehicle battery and determine whether the discharge parameters of the vehicle battery meet the first condition. In this way, not only the temperature of the vehicle battery is considered, but also the condition of the vehicle battery itself. Only when heating is required and the conditions of the vehicle battery itself allow heating, the heating device is controlled to heat the vehicle battery. In this way, it is possible to avoid the vehicle battery from supplying power to the heating device when the battery power is low, thereby avoiding damage to the vehicle battery.

Description

Technical Field

[0001] The present application relates to the field of vehicle control, and in particular to a control method, device and system for a vehicle-mounted battery. Background Art

[0002] Electric vehicles can store electrical energy through batteries or other energy storage devices, and then use the stored electrical energy to drive the vehicle. They have the advantages of energy saving, environmental protection, and low pollution, and have been widely used. The energy storage device installed in the vehicle can be called an on-board battery. The on-board battery can be connected to the vehicle's power device (such as an electric motor) to provide power to the vehicle's power device to drive the vehicle. In addition, the on-board battery can also be used to provide energy for one or more electrical devices on the vehicle to enable these electrical devices to work normally and maintain the normal driving of the vehicle.

[0003] The on-board battery converts chemical energy into electrical energy through chemical reverse conversion. Obviously, if the ambient temperature is low and the temperature of the on-board battery is at a low level, the speed of the chemical reaction in the on-board battery may be slow, and it may also affect the normal operation of the chemical reaction in the on-board battery. Therefore, the power system of some vehicles also includes a heating device for heating the on-board battery so that the on-board battery operates at a temperature with higher discharge efficiency.

[0004] However, if the remaining power in the vehicle battery is low, controlling the vehicle battery to discharge may have an impact on the vehicle battery, causing damage to the vehicle battery. Summary of the invention

[0005] In view of this, the embodiments of the present application provide a method, device and system for controlling a vehicle battery, aiming to prevent damage to the vehicle battery.

[0006] In a first aspect, an embodiment of the present application provides a method for controlling a vehicle battery, characterized in that the method is applied to a control device in a vehicle power system, the vehicle power system further includes a vehicle battery, a power device and a heating device, the vehicle battery is connected to the heating device and the power device respectively, and the method includes:

[0007] Obtaining the temperature of the vehicle battery;

[0008] In response to the temperature of the vehicle battery belonging to the first temperature interval, obtaining a discharge parameter of the vehicle battery, wherein the discharge parameter of the vehicle battery is used to indicate a discharge capacity of the vehicle battery;

[0009] In response to a discharge parameter of the vehicle-mounted battery satisfying a first condition, the vehicle-mounted battery is controlled to supply power to the power device and the heating device.

[0010] In a possible implementation, the discharge parameter of the vehicle battery includes the output voltage of the vehicle battery and the remaining power of the vehicle battery; and the method further includes:

[0011] Determining whether the discharge parameter of the vehicle-mounted battery meets the first condition;

[0012] Among them, the first condition includes: the output voltage of the vehicle battery is not less than the first voltage, and the remaining power of the vehicle battery is not less than the first power, and the remaining power of the vehicle battery is not greater than the second power, the second power is greater than the first power, the first voltage is determined according to the minimum voltage of the vehicle battery under normal discharge, and the first power is determined according to the minimum power of the vehicle battery under normal discharge.

[0013] In a possible implementation, the method further includes:

[0014] In response to the discharge parameter of the vehicle battery satisfying a second condition, controlling the vehicle battery to supply power to the power device, and controlling the vehicle battery not to supply power to the heating device;

[0015] Among them, the second condition includes: the output voltage of the vehicle battery is not less than the first voltage, the remaining power of the vehicle battery is not less than the second power, and the second power is the power at which the discharge efficiency of the vehicle battery is not affected by temperature.

[0016] In a possible implementation, the method further includes:

[0017] In response to the temperature of the vehicle battery belonging to the second temperature interval, controlling the vehicle battery to supply power to the power device, and controlling the vehicle battery not to supply power to the heating device;

[0018] Wherein, the lowest temperature in the second temperature range is not less than the highest temperature in the first temperature range.

[0019] In a possible implementation, the method further includes:

[0020] In response to the temperature of the vehicle battery belonging to a third temperature interval, obtaining a discharge parameter of the vehicle battery, wherein the highest temperature in the third temperature interval is not greater than the lowest temperature in the first temperature interval;

[0021] In response to a discharge parameter of the vehicle-mounted battery satisfying a first condition, the vehicle-mounted battery is controlled to supply power to the power device and the heating device, and an output power of the power device is limited to be less than a first power.

[0022] In a second aspect, an embodiment of the present application provides a control device for a vehicle-mounted battery, the control device belongs to a vehicle power system, the vehicle power system further includes a vehicle-mounted battery, a power device and a heating device, the vehicle-mounted battery is connected to the heating device and the power device respectively, and the control device includes:

[0023] An acquisition unit, used to acquire the temperature of the vehicle-mounted battery;

[0024] A processing unit is used to obtain a discharge parameter of the vehicle battery in response to the temperature of the vehicle battery belonging to a first temperature range, wherein the discharge parameter of the vehicle battery is used to indicate the discharge capacity of the vehicle battery; in response to the discharge parameter of the vehicle battery satisfying a first condition, control the vehicle battery to supply power to the power device and the heating device.

[0025] In a possible implementation, the discharge parameter of the vehicle battery includes the output voltage of the vehicle battery and the remaining power of the vehicle battery;

[0026] The processing unit is also used to determine whether the discharge parameters of the vehicle battery meet the first condition; wherein the first condition includes: the output voltage of the vehicle battery is not less than the first voltage, and the remaining power of the vehicle battery is not less than the first power, and the remaining power of the vehicle battery is not greater than the second power, the second power is greater than the first power, the first voltage is determined according to the minimum voltage of the vehicle battery for normal discharge, and the first power is determined according to the minimum power of the vehicle battery for normal discharge.

[0027] In one possible implementation, the processing unit is further used to control the vehicle battery to supply power to the power device and control the vehicle battery not to supply power to the heating device in response to the discharge parameters of the vehicle battery satisfying a second condition; wherein the second condition includes: the output voltage of the vehicle battery is not less than the first voltage, the remaining power of the vehicle battery is not less than the second power, and the second power is the power at which the discharge efficiency of the vehicle battery is not affected by temperature.

[0028] In one possible implementation, the processing unit is also used to control the vehicle battery to supply power to the power device and control the vehicle battery not to supply power to the heating device in response to the temperature of the vehicle battery belonging to a second temperature range; wherein the lowest temperature in the second temperature range is not less than the highest temperature in the first temperature range.

[0029] In one possible implementation, the processing unit is also used to obtain the discharge parameters of the vehicle battery in response to the temperature of the vehicle battery belonging to a third temperature range, the highest temperature in the third temperature range being no greater than the lowest temperature in the first temperature range; in response to the discharge parameters of the vehicle battery satisfying a first condition, control the vehicle battery to supply power to the power device and the heating device, and limit the output power of the power device to be less than the first power.

[0030] In a third aspect, an embodiment of the present application provides a vehicle power system, the vehicle power system comprising a control device, a vehicle-mounted battery, a power device and a heating device, the vehicle-mounted battery being connected to the heating device and the power device respectively;

[0031] The on-board battery is used to supply power to the power device and / or the heating device;

[0032] The power device is used to drive the vehicle;

[0033] The heating device is used to heat the vehicle-mounted battery;

[0034] The control device is used to obtain the temperature of the vehicle battery; in response to the temperature of the vehicle battery belonging to the first temperature range, obtain the discharge parameters of the vehicle battery, and the discharge parameters of the vehicle battery include the output voltage of the vehicle battery; in response to the discharge parameters of the vehicle battery satisfying the first condition, control the vehicle battery to supply power to the power device and the heating device.

[0035] In a fourth aspect, an embodiment of the present application provides a device, comprising a memory and a processor, wherein the memory is used to store instructions or codes, and the processor is used to execute the instructions or codes so that the device executes the vehicle battery control method described in any one of the first aspects above.

[0036] In a fifth aspect, an embodiment of the present application provides a computer storage medium, in which a code is stored. When the code is executed, the device executing the code implements the vehicle battery control method described in any one of the first aspects above.

[0037] In a sixth aspect, an embodiment of the present application provides a vehicle, comprising the vehicle system as described in the third aspect above.

[0038] The embodiment of the present application provides a control method, device and system for a vehicle-mounted battery, which can be applied to a control device on a vehicle. The control device belongs to a vehicle power system, and the vehicle power system also includes a vehicle-mounted battery, a power device and a heating device. The vehicle-mounted battery is connected to the heating device and the power device respectively. When executing the control method for the vehicle-mounted battery provided in the embodiment of the present application, the control device can first obtain the temperature of the vehicle-mounted battery. Then, the control device determines whether the temperature of the vehicle-mounted battery is in a first temperature range. If the temperature of the vehicle-mounted battery is in the first temperature range, it means that the vehicle-mounted battery may need to be heated to reach a temperature with high discharge efficiency. Then the control device can further obtain the discharge parameters of the vehicle-mounted battery. The discharge parameters of the vehicle-mounted battery include at least the output voltage of the vehicle-mounted battery. It can be understood that the higher the output voltage of the vehicle-mounted battery, the more power is left in the vehicle-mounted battery. Then, the control device determines whether the discharge parameters of the vehicle-mounted battery meet the first condition. If the discharge parameters of the vehicle-mounted battery meet the first condition, it means that the remaining power in the vehicle-mounted battery is high, and the vehicle-mounted battery can power the power device and the heating device at the same time. Then the control device can control the vehicle-mounted battery to power the power device and the heating device. In this way, not only the temperature of the vehicle battery but also the condition of the vehicle battery itself is considered. The heating device is controlled to heat the vehicle battery only when heating is required and the conditions of the vehicle battery itself allow heating. In this way, it can be avoided that the vehicle battery is not powered by the heating device when the power is low, thus avoiding damage to the vehicle battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in this embodiment or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 A schematic diagram of the structure of a vehicle power system provided in an embodiment of the present application;

[0041] Figure 2 A method flow chart of a method for controlling a vehicle battery provided in an embodiment of the present application;

[0042] Figure 3 Another method flow chart of the vehicle battery control method adopted in the embodiment of the present application;

[0043] Figure 4 A schematic diagram of the structure of a vehicle battery control device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0044] On-board batteries can be divided into two types: fuel cells and batteries. Among them, batteries have the characteristics of simple structure, rechargeability and easy replacement, and have been widely used. The materials in the battery release electrical energy to the outside world when a chemical reaction occurs. When the external power source charges the battery, the above chemical reaction is reversed to store energy in the battery. Considering the characteristics of the materials in the battery, when the temperature is below a certain level, the discharge efficiency of the battery will gradually decrease. Moreover, discharge at low temperatures may cause irreversible damage to the battery, affecting the service life of the battery.

[0045] If the vehicle battery is a storage battery, a heating device may be provided on the vehicle to ensure that the vehicle battery can normally supply power to the power unit. The heating device may be, for example, a heating wire or other device used to increase the temperature of the vehicle battery. In this way, even if the ambient temperature is low, the vehicle battery may be heated to a temperature at which it can be discharged normally by the heating device. Currently, when it is detected that the temperature of the vehicle battery is lower than a certain temperature threshold, the vehicle battery may be controlled to supply power to the heating device and the power unit at the same time, so as to heat the vehicle battery while the vehicle is driving.

[0046] However, if the remaining power of the vehicle battery is low, the large current discharge required to power the heating device and the power device at the same time may cause the output voltage of the vehicle battery to drop rapidly, affecting the normal discharge of the vehicle battery and may also cause damage to the vehicle battery.

[0047] In order to solve the above technical problems, the embodiments of the present application provide a control method, device and system for a vehicle-mounted battery.

[0048] Let's first combine Figure 1 , the system provided by the embodiment of the present application is introduced. Figure 1 , which is a structural schematic diagram of the vehicle power system provided in an embodiment of the present application.

[0049] exist Figure 1 In the illustrated embodiment, the vehicle power system 100 on the vehicle includes a control device 111, a vehicle battery 121, a power device 122, and a heating device 123. The heating device 123 and the power 122 are connected in parallel to the vehicle battery 121, and the control device 111 can be connected to any one or more of the vehicle battery 121, the power device 122, and the heating device 123, respectively.

[0050] Optionally, the vehicle power system 100 may further include a first switch device 124 and a second switch device 125. The first switch device 124 is located on the main circuit of the vehicle power system 100, and is used to control whether the vehicle battery supplies power to the outside. The second switch device 125 is located on the path from the vehicle battery 121 to the heating device 123. If the first switch device 124 is turned on, including the various circuits of the vehicle battery 121, the vehicle battery 121 can supply power to the outside; if the first switch device 124 is turned off, including the various circuits of the vehicle battery 121, the vehicle battery 121 cannot supply power to the outside. If the second switch device 125 is turned on, the circuit between the vehicle battery 121 and the heating device 123 is connected, and the vehicle battery 121 supplies power to the heating device 121; if the second switch device 125 is turned off, the circuit between the vehicle battery 121 and the heating device 123 is disconnected, and the vehicle battery 121 stops supplying power to the heating device 123. The control device 111 is connected to the first switch device 124 and the second switch device 125 respectively, and is used to control the connection and disconnection of the first switch device 124 and the second switch device 125.

[0051] The vehicle battery control method provided in the embodiment of the present application can be applied to the control device 111. Specifically, the control device 111 can be a vehicle control device of the vehicle, or a control device for controlling a charging system on the vehicle, for example, a battery management system (BMS) of the vehicle.

[0052] Optionally, the first switch device 124 and the second switch device 125 may be relays. In some possible implementations, considering the safety of vehicle power use, the first switch device 124 may include two relays, which are respectively located at the positive pole and the negative pole of the vehicle battery 121. They are also called total positive relays and total negative relays. The total positive relay and the total negative relay are turned on (or off) synchronously.

[0053] The following is an explanation of the control method of the vehicle battery provided in the embodiment of the present application from the perspective of the control device. Obviously, the described embodiment is only a part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0054] See also Figure 2 , Figure 2 A method flow chart of a method for controlling a vehicle battery provided in an embodiment of the present application includes:

[0055] S201: Acquire the temperature of the vehicle-mounted battery.

[0056] After the vehicle power system is started, the control device may first obtain the temperature of the vehicle battery. For example, the control device may obtain the temperature of the vehicle battery through a temperature sensor. It is understandable that if S201 is executed after the vehicle power system is started, the temperature of the vehicle battery may be close to or equal to the ambient temperature.

[0057] After obtaining the temperature of the vehicle battery, the control device can compare the temperature of the vehicle battery with the first temperature and the second temperature. If the temperature of the vehicle battery is not less than the first temperature and the temperature of the vehicle battery is not greater than the second temperature, the control device determines that the temperature of the vehicle battery belongs to the first temperature range.

[0058] The first temperature is lower than the second temperature. The first temperature is a temperature that allows the vehicle battery to discharge normally, and the second temperature is a temperature that allows the vehicle battery to discharge with a large current. That is, if the ambient temperature is lower than the first temperature, the discharge of the vehicle battery will have an impact on the vehicle battery; after the ambient temperature reaches the first temperature, the discharge of the vehicle battery may not have an impact on the vehicle battery; after the ambient temperature reaches the second temperature, the discharge of the vehicle battery will not have an impact on the vehicle battery.

[0059] Therefore, if the temperature of the vehicle battery is between the first temperature and the second temperature, the discharge of the vehicle battery may or may not affect the vehicle battery. Therefore, in order to determine whether the discharge of the vehicle battery will affect the vehicle battery, after determining that the temperature of the vehicle battery belongs to the first interval, the control device can continue to execute S202 to make further judgments in combination with relevant parameters of the vehicle battery itself.

[0060] S202: In response to the temperature of the vehicle battery belonging to the first temperature range, obtaining a discharge parameter of the vehicle battery.

[0061] After determining that the temperature of the vehicle battery belongs to the first temperature range, the control device can obtain the discharge parameters of the vehicle battery. The discharge parameters of the vehicle battery are used to indicate the discharge capacity of the vehicle battery. For example, the discharge parameters of the vehicle battery may include the output voltage of the vehicle battery and / or the remaining power of the vehicle battery. Considering that the remaining power of the vehicle battery is often difficult to measure accurately, it is possible to more accurately judge whether the discharge of the vehicle battery will have an impact on the vehicle battery in combination with the output voltage of the vehicle battery.

[0062] S203: In response to the discharge parameter of the vehicle-mounted battery satisfying a first condition, controlling the vehicle-mounted battery to supply power to the power device and the heating device.

[0063] After obtaining the discharge parameters of the vehicle battery, the control device may determine whether the discharge parameters of the vehicle battery meet a first condition, wherein the first condition is used to indicate whether the discharge capacity of the vehicle battery allows the vehicle battery to discharge within a first temperature range.

[0064] If the discharge parameter of the vehicle battery meets the first condition, it means that the discharge capacity of the vehicle battery allows the vehicle battery to be discharged within the first temperature range. The discharge of the vehicle battery will not affect the vehicle battery.

[0065] Then the control device can control the vehicle battery to supply power to the power device and the heating device at the same time, for example, the first switch device and the second switch device can be controlled to be turned on. In this way, the vehicle battery drives the power device to provide power for the vehicle while heating itself through the heating device, which can increase the temperature of the vehicle battery while ensuring the normal driving of the vehicle, thereby improving the discharge efficiency of the vehicle battery.

[0066] If the discharge parameter of the vehicle battery does not meet the first condition, it means that the discharge capacity of the vehicle battery does not allow the vehicle battery to discharge within the first temperature range. The discharge of the vehicle battery will have an impact on the vehicle battery. Then the control device can issue a charging reminder to prompt the driver to charge the vehicle.

[0067] As described above, the discharge parameters of the vehicle battery may include the output voltage of the vehicle battery and / or the remaining power of the vehicle battery. Accordingly, the first condition may include the first voltage and / or the first power.

[0068] Specifically, if the first condition includes the first voltage, the discharge parameter of the vehicle battery may include the output voltage of the vehicle battery. When judging whether the discharge parameter of the vehicle battery meets the first condition, the magnitude relationship between the output voltage of the vehicle battery and the first voltage may be compared. If the output voltage of the vehicle battery is less than the first voltage, the control device determines that the discharge parameter of the battery does not meet the first condition.

[0069] If the first condition includes the first power, the discharge parameter of the vehicle battery may include the remaining power of the vehicle battery. When judging whether the discharge parameter of the vehicle battery meets the first condition, the magnitude relationship between the remaining power of the vehicle battery and the first power may be compared. If the remaining power of the vehicle battery is less than the first power, the control device determines that the discharge parameter of the battery does not meet the first condition.

[0070] The embodiment of the present application provides a control method for a vehicle battery, which can be applied to a control device on a vehicle. The control device belongs to a vehicle power system, and the vehicle power system also includes a vehicle battery, a power device and a heating device. The vehicle battery is connected to the heating device and the power device respectively. When executing the control method for the vehicle battery provided in the embodiment of the present application, the control device can first obtain the temperature of the vehicle battery. Then, the control device determines whether the temperature of the vehicle battery is in a first temperature range. If the temperature of the vehicle battery is in the first temperature range, it means that the vehicle battery may need to be heated to reach a temperature with high discharge efficiency. Then the control device can further obtain the discharge parameters of the vehicle battery. The discharge parameters of the vehicle battery include at least the output voltage of the vehicle battery. It can be understood that the higher the output voltage of the vehicle battery, the more power is left in the vehicle battery. Then, the control device determines whether the discharge parameters of the vehicle battery meet the first condition. If the discharge parameters of the vehicle battery meet the first condition, it means that the remaining power in the vehicle battery is high, and the vehicle battery can power the power device and the heating device at the same time. Then the control device can control the vehicle battery to power the power device and the heating device. In this way, not only the temperature of the vehicle battery but also the condition of the vehicle battery itself is considered. The heating device is controlled to heat the vehicle battery only when heating is required and the conditions of the vehicle battery itself allow heating. In this way, it can be avoided that the vehicle battery is not powered by the heating device when the power is low, thus avoiding damage to the vehicle battery.

[0071] In the implementation described above, the vehicle battery can supply power to the heating device and the power device at the same time. However, if the discharge capacity of the vehicle battery is sufficient, the vehicle battery can achieve high-efficiency discharge at a lower temperature. Therefore, in this case, in order to save the electrical energy stored in the vehicle battery, the vehicle battery may not be heated. That is to say, if the temperature of the vehicle battery belongs to the first interval, the control device can also determine whether the discharge parameters of the vehicle battery meet the second condition. If the discharge parameters of the vehicle battery meet the second condition, the control device can control the vehicle battery to supply power to the power device, and control the vehicle battery not to supply power to the heating device.

[0072] The second condition includes: the output voltage of the vehicle battery is not less than the first voltage, and the remaining power of the vehicle battery is not less than the second power. The second power is greater than the first power and is the power at which the discharge efficiency of the vehicle battery is not affected by temperature.

[0073] If the temperature of the vehicle battery does not belong to the first temperature range, the control device may perform the following operations:

[0074] If the temperature of the vehicle battery is greater than the second temperature, the control device determines that the temperature of the vehicle battery belongs to the second temperature range. At this time, the temperature of the vehicle battery is relatively high, and the discharge efficiency of the vehicle battery will not be affected by the remaining power of the vehicle battery, and there is no need to heat the vehicle battery. Then the control device can control the vehicle battery to supply power to the power device, and control the vehicle battery not to supply power to the heating device.

[0075] If the temperature of the vehicle battery is lower than the first temperature, the control device determines that the temperature of the vehicle battery belongs to the first temperature range. At this time, the temperature of the vehicle battery is relatively low, and if the vehicle battery is discharged with a large current, it may cause damage to the vehicle battery. Therefore, the vehicle battery can determine whether the discharge parameters of the vehicle battery meet the first condition. If the discharge parameters of the vehicle battery do not meet the first condition, the control device can issue a charging reminder to prompt the driver to charge the vehicle. If the discharge parameters of the vehicle battery meet the first condition, the control device can control the vehicle battery to power the power unit and the heating device. In order to avoid large current discharge of the vehicle battery, the control device can also limit the output power of the power unit to be less than the first power. For example, the control device can limit the output power of the power unit by issuing a communication instruction.

[0076] Specifically, assuming that the control device controls the charging device to supply power to the power device through the total positive relay and the total negative relay, and controls the charging device to supply power to the heating device through the heating relay, and the technical solution provided in the embodiment of the present application is executed by the BMS, then a flow chart of the technical solution provided in the embodiment of the present application can be as follows: Figure 3 shown.

[0077] The above are some specific implementations of the vehicle battery control method provided in the embodiment of the present application. Based on this, the present application also provides a corresponding device. The device provided in the embodiment of the present application will be introduced from the perspective of functional modularization.

[0078] See also Figure 4 The schematic diagram of the structure of the control device of the vehicle-mounted battery is shown, and the device 400 includes an acquisition unit 410 and a processing unit 420.

[0079] The acquisition unit 410 is used to acquire the temperature of the vehicle-mounted battery.

[0080] The processing unit 420 is used to obtain the discharge parameters of the vehicle battery in response to the temperature of the vehicle battery belonging to the first temperature range, and the discharge parameters of the vehicle battery are used to indicate the discharge capacity of the vehicle battery; in response to the discharge parameters of the vehicle battery satisfying the first condition, control the vehicle battery to supply power to the power device and the heating device.

[0081] The embodiment of the present application provides a control device for a vehicle battery. Specifically, the control device may first obtain the temperature of the vehicle battery. Then, the control device determines whether the temperature of the vehicle battery is in a first temperature range. If the temperature of the vehicle battery is in the first temperature range, it means that the vehicle battery may need to be heated to reach a temperature with high discharge efficiency. Then the control device may further obtain the discharge parameter of the vehicle battery. The discharge parameter of the vehicle battery includes at least the output voltage of the vehicle battery. It is understandable that the higher the output voltage of the vehicle battery, the more power remaining in the vehicle battery. Then, the control device determines whether the discharge parameter of the vehicle battery meets the first condition. If the discharge parameter of the vehicle battery meets the first condition, it means that the remaining power in the vehicle battery is high, and the vehicle battery can supply power to the power device and the heating device at the same time. Then the control device can control the vehicle battery to supply power to the power device and the heating device. In this way, not only the temperature of the vehicle battery is considered, but also the condition of the vehicle battery itself. Only when heating is required and the conditions of the vehicle battery itself allow heating, the heating device is controlled to heat the vehicle battery. In this way, it can be avoided that the vehicle battery supplies power to the heating device when the power is low, and damage to the vehicle battery can be avoided.

[0082] In a possible implementation, the discharge parameter of the vehicle battery includes the output voltage of the vehicle battery and the remaining power of the vehicle battery;

[0083] The processing unit 420 is also used to determine whether the discharge parameters of the vehicle battery meet the first condition; wherein the first condition includes: the output voltage of the vehicle battery is not less than the first voltage, and the remaining power of the vehicle battery is not less than the first power, and the remaining power of the vehicle battery is not greater than the second power, the second power is greater than the first power, the first voltage is determined according to the minimum voltage of the vehicle battery for normal discharge, and the first power is determined according to the minimum power of the vehicle battery for normal discharge.

[0084] In one possible implementation, the processing unit 420 is also used to control the vehicle-mounted battery to supply power to the power device and control the vehicle-mounted battery not to supply power to the heating device in response to the discharge parameters of the vehicle-mounted battery satisfying a second condition; wherein the second condition includes: the output voltage of the vehicle-mounted battery is not less than the first voltage, the remaining power of the vehicle-mounted battery is not less than the second power, and the second power is the power at which the discharge efficiency of the vehicle-mounted battery is not affected by temperature.

[0085] In one possible implementation, the processing unit 420 is also used to control the vehicle battery to supply power to the power device and control the vehicle battery not to supply power to the heating device in response to the temperature of the vehicle battery belonging to the second temperature range; wherein the lowest temperature in the second temperature range is not less than the highest temperature in the first temperature range.

[0086] In one possible implementation, the processing unit 420 is also used to obtain the discharge parameters of the vehicle battery in response to the temperature of the vehicle battery belonging to a third temperature range, the highest temperature in the third temperature range is not greater than the lowest temperature in the first temperature range; in response to the discharge parameters of the vehicle battery satisfying the first condition, control the vehicle battery to supply power to the power device and the heating device, and limit the output power of the power device to be less than the first power.

[0087] The embodiments of the present application also provide corresponding devices, computer storage media and vehicles for implementing any vehicle battery control method provided in the embodiments of the present application.

[0088] The device includes a memory and a processor, the memory is used to store instructions or codes, and the processor is used to execute the instructions or codes, so that the device acts as a control device to execute the vehicle battery control method described in any embodiment of the present application.

[0089] The computer storage medium stores codes, and when the codes are executed, the device executing the codes implements the method for controlling the vehicle battery described in any embodiment of the present application.

[0090] The vehicle comprises the vehicle power system provided by any embodiment of the present application.

[0091] The "first" and "second" in the names such as "first" and "second" (if any) mentioned in the embodiments of the present application are only used as name identifiers and do not represent the first or second in order.

[0092] Through the description of the above implementation methods, it can be known that those skilled in the art can clearly understand that all or part of the steps in the above-mentioned embodiment method can be implemented by means of software plus a general hardware platform. Based on such an understanding, the technical solution of the present application can be embodied in the form of a software product, which can be stored in a storage medium, such as a read-only memory (ROM) / RAM, a magnetic disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network communication device such as a router) to execute the methods described in each embodiment of the present application or some parts of the embodiments.

[0093] Each embodiment in this specification is described in a progressive manner, and the same and similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative work.

[0094] The above description is merely an exemplary embodiment of the present application and is not intended to limit the protection scope of the present application.

Claims

1. A method for controlling a vehicle battery, characterized in that: The method is applied to a control device in a vehicle power system, wherein the vehicle power system further comprises an on-board battery, a power device and a heating device, wherein the on-board battery is connected to the heating device and the power device respectively, and the method comprises: Obtaining the temperature of the vehicle battery; In response to the temperature of the vehicle battery belonging to the first temperature interval, obtaining a discharge parameter of the vehicle battery, wherein the discharge parameter of the vehicle battery is used to indicate a discharge capacity of the vehicle battery; In response to a discharge parameter of the vehicle-mounted battery satisfying a first condition, controlling the vehicle-mounted battery to supply power to the power device and the heating device; The discharge parameters of the vehicle battery include the output voltage of the vehicle battery and the remaining power of the vehicle battery; the method further includes: Determining whether the discharge parameter of the vehicle-mounted battery meets the first condition; The first condition includes: the output voltage of the vehicle battery is not less than the first voltage, and the remaining power of the vehicle battery is not less than the first power, and the remaining power of the vehicle battery is not greater than the second power, the second power is greater than the first power, the first voltage is determined according to the minimum voltage of the vehicle battery during normal discharge, and the first power is determined according to the minimum power of the vehicle battery during normal discharge; In response to the discharge parameter of the vehicle battery satisfying a second condition, controlling the vehicle battery to supply power to the power device, and controlling the vehicle battery not to supply power to the heating device; The second condition includes: the output voltage of the vehicle battery is not less than the first voltage, the remaining power of the vehicle battery is not less than the second power, and the second power is the power at which the discharge efficiency of the vehicle battery is not affected by temperature; In response to the temperature of the vehicle battery belonging to the second temperature interval, controlling the vehicle battery to supply power to the power device, and controlling the vehicle battery not to supply power to the heating device; Wherein, the lowest temperature in the second temperature interval is not less than the highest temperature in the first temperature interval; In response to the temperature of the vehicle battery belonging to a third temperature interval, obtaining a discharge parameter of the vehicle battery, wherein the highest temperature in the third temperature interval is not greater than the lowest temperature in the first temperature interval; In response to a discharge parameter of the vehicle-mounted battery satisfying a first condition, the vehicle-mounted battery is controlled to supply power to the power device and the heating device, and an output power of the power device is limited to be less than a first power.

2. A vehicle battery control device, characterized in that: The control device belongs to the vehicle power system, and the vehicle power system also includes a vehicle battery, a power device and a heating device, the vehicle battery is connected to the heating device and the power device respectively, and the control device includes: An acquisition unit, used to acquire the temperature of the vehicle-mounted battery; a processing unit, configured to obtain a discharge parameter of the vehicle battery in response to the temperature of the vehicle battery belonging to a first temperature interval, wherein the discharge parameter of the vehicle battery is used to indicate a discharge capacity of the vehicle battery; and in response to the discharge parameter of the vehicle battery satisfying a first condition, control the vehicle battery to supply power to the power device and the heating device; The discharge parameters of the vehicle battery include the output voltage of the vehicle battery and the remaining power of the vehicle battery; The processing unit is further used to determine whether the discharge parameter of the vehicle battery meets the first condition; wherein the first condition includes: the output voltage of the vehicle battery is not less than the first voltage, and the remaining power of the vehicle battery is not less than the first power, and the remaining power of the vehicle battery is not greater than the second power, the second power is greater than the first power, the first voltage is determined according to the minimum voltage of the vehicle battery for normal discharge, and the first power is determined according to the minimum power of the vehicle battery for normal discharge; The processing unit is further used for controlling the on-board battery to supply power to the power device and controlling the on-board battery not to supply power to the heating device in response to the discharge parameter of the on-board battery satisfying a second condition; wherein the second condition includes: the output voltage of the on-board battery is not less than the first voltage, the remaining power of the on-board battery is not less than the second power, and the second power is the power at which the discharge efficiency of the on-board battery is not affected by temperature; The processing unit is further configured to control the vehicle battery to supply power to the power device and control the vehicle battery not to supply power to the heating device in response to the temperature of the vehicle battery belonging to a second temperature range; wherein the lowest temperature in the second temperature range is not less than the highest temperature in the first temperature range; In response to the temperature of the vehicle battery belonging to a third temperature interval, obtaining a discharge parameter of the vehicle battery, wherein the highest temperature in the third temperature interval is not greater than the lowest temperature in the first temperature interval; In response to a discharge parameter of the vehicle-mounted battery satisfying a first condition, the vehicle-mounted battery is controlled to supply power to the power device and the heating device, and an output power of the power device is limited to be less than a first power.

3. A vehicle power system, characterized in that: The vehicle power system comprises a control device, an on-board battery, a power device and a heating device, wherein the on-board battery is connected to the heating device and the power device respectively; The on-board battery is used to supply power to the power device and / or the heating device; The power device is used to drive the vehicle; The heating device is used to heat the vehicle-mounted battery; The control device is used to obtain the temperature of the vehicle battery; In response to the temperature of the on-board battery belonging to the first temperature interval, obtaining the discharge parameters of the on-board battery, the discharge parameters of the on-board battery including the output voltage of the on-board battery; in response to the discharge parameters of the on-board battery satisfying the first condition, controlling the on-board battery to supply power to the power device and the heating device; the discharge parameters of the on-board battery include the output voltage of the on-board battery and the remaining power of the on-board battery; judging whether the discharge parameters of the on-board battery satisfy the first condition; wherein the first condition includes: the output voltage of the on-board battery is not less than the first voltage, and, the remaining power of the on-board battery is not less than the first power, and the remaining power of the on-board battery is not greater than the second power, the second power is greater than the first power, the first voltage is determined according to the minimum voltage of the normal discharge of the on-board battery, and the first power is determined according to the minimum power of the normal discharge of the on-board battery; in response to the discharge parameters of the on-board battery satisfying the second condition, controlling the on-board battery to The power device supplies power, and controls the on-board battery not to supply power to the heating device; wherein, the second condition includes: the output voltage of the on-board battery is not less than the first voltage, the remaining power of the on-board battery is not less than the second power, and the second power is the power at which the discharge efficiency of the on-board battery is not affected by temperature; in response to the temperature of the on-board battery belonging to the second temperature range, the on-board battery is controlled to supply power to the power device, and the on-board battery is controlled not to supply power to the heating device; wherein, the lowest temperature in the second temperature range is not less than the highest temperature in the first temperature range; in response to the temperature of the on-board battery belonging to the third temperature range, the discharge parameter of the on-board battery is obtained, and the highest temperature in the third temperature range is not greater than the lowest temperature in the first temperature range; in response to the discharge parameter of the on-board battery satisfying the first condition, the on-board battery is controlled to supply power to the power device and the heating device, and the output power of the power device is limited to be less than the first power.

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