Motor waste heat recovery control method, control method and medium

Abstract

The invention relates to the technical field of electric vehicle heat management, in particular to a motor waste heat recovery control method, a control method and a medium. Comprising the steps that when a vehicle is in a running state, the battery pack heating requirement is judged; if the heating demand of the battery pack is judged to be the heating demand and the allowable discharge power of the battery pack is greater than the power required for normal driving of the vehicle, judging the thermal state of the motor, and performing control operation of heating the battery pack without using the motor waste heat, recycling the motor waste heat to the battery pack or storing heat of the motor based on the thermal state of the motor. The motor waste heat recovery control method is suitable for the electric automobile, the motor waste heat can be well recycled, normal work of the battery pack is not affected, and energy consumption of heating in winter is saved.

Description

Background Art

[0002] Existing electric vehicles are generally equipped with a waste heat recovery function, that is, the waste heat generated by the motor is recovered and reused. In the existing waste heat recovery function, the thermal management system connects the motor water temperature to the battery side through a four-way water valve for heat exchange, and the motor water pump and the battery water pump operate at their maximum capacity.

[0003] For example, a Chinese invention patent application with the patent number "CN 116142034 A" and the title "Motor Waste Heat Utilization Method, Device, Storage Medium and Vehicle" provides a motor waste heat utilization method. After the vehicle is powered on and the air conditioning heating function is turned on, the method triggers a preset clock to start timing based on the outlet water temperature of the motor; obtains the battery state of charge and battery temperature within a preset time period; the preset time period is: from the moment when the timing time of the preset clock is greater than the preset time length as the starting moment to the moment when the vehicle is powered off as the ending moment; based on the charge state and the battery temperature, determines the discharge capacity of the battery; when the battery discharge capacity is sufficient, controls the air conditioning heat pump to absorb the motor waste heat for heating; when the battery discharge capacity is insufficient, controls the battery circuit to absorb the motor waste heat to heat the battery, so as to increase the battery temperature. This method determines the discharge capacity of the battery based on the battery state of charge and battery temperature, and then reasonably selects the motor waste heat utilization method according to the discharge capacity (including using the motor waste heat to heat the air conditioner heat pump and using the motor waste heat to heat the battery), so that the battery can maintain sufficient discharge capacity in a low state of charge and low temperature environment, and can also use the motor waste heat for heating, thereby improving the economic benefits of battery energy consumption.

[0004] However, this control method also has some problems. When the battery discharge capacity is insufficient, in order to ensure the power, the battery pack should be heated up quickly. At this time, the electric heating method should be switched. Although this method can recover the motor waste heat and increase the battery pack temperature, the speed is too slow. During vehicle driving, due to complex operating conditions, the motor outlet temperature fluctuates greatly. This method determines whether to recover the motor waste heat to the battery pack by comparing whether the temperature here is greater than the set threshold. The effectiveness of the heat exchange between the motor and the battery pack cannot be guaranteed. Summary of the invention

[0005] The purpose of the present invention is to solve the deficiencies of the above-mentioned background technology and to provide a motor waste heat recovery control method, a control method and a medium.

[0006] The technical solution of the present invention is: a motor waste heat recovery control method, comprising:

[0007] When the vehicle is in motion, determine the heating requirements for the battery pack;

[0008] If the battery pack heating demand is judged to be there, and the allowable discharge power of the battery pack is greater than the power required for normal driving of the vehicle, the thermal state of the motor is judged, and based on the thermal state of the motor, control operations are performed such as not using the motor waste heat to heat the battery pack, recovering the motor waste heat to the battery pack, or storing heat in the motor.

[0009] According to a motor waste heat recovery control method provided in the present application, the method of performing control operations based on the thermal state of the motor to heat the battery pack without using the motor waste heat, recover the motor waste heat to the battery pack, or store heat in the motor includes: if the motor temperature is between a first set temperature and a second set temperature for the first time after power-on, or if the motor temperature is not the first time after power-on and is less than the second set temperature, performing a control operation to store heat in the motor; the first set temperature is set based on the minimum cell temperature of the battery pack, and the second set temperature is greater than the first set temperature.

[0010] According to a motor waste heat recovery control method provided in the present application, the method for performing control operations based on the thermal state of the motor to perform control operations of not using the motor waste heat to heat the battery pack, recovering the motor waste heat to the battery pack, or storing heat in the motor includes: if the motor temperature is not between the first set temperature and the fourth set temperature for the first time after power-on, or the motor temperature is between the second set temperature and the third set temperature for the first time after power-on, performing a control operation of recovering the motor waste heat to heat the battery pack; the fourth set temperature is greater than the third set temperature, greater than the second set temperature, and greater than the first set temperature.

[0011] According to a motor waste heat recovery control method provided in the present application, the method of performing control operations based on the thermal state of the motor to not use the motor waste heat to heat the battery pack, recover the motor waste heat to the battery pack, or store heat in the motor includes: if the motor temperature is between the third set temperature and the fourth set temperature for the first time after power-on, or the motor temperature is not the first time after power-on and is greater than the third set temperature, performing a control operation of not using the motor waste heat to heat the battery pack.

[0012] According to a motor waste heat recovery control method provided in the present application, the first set temperature is obtained by setting a value based on the minimum cell temperature of the battery pack.

[0013] According to a motor waste heat recovery control method provided in the present application, the method for judging the heating demand of the battery pack includes: judging whether the battery pack temperature enters the interval of the first set temperature threshold and the second set temperature threshold for the first time after power-on; if the battery pack enters the interval of the first set temperature threshold and the second set temperature threshold for the first time after power-on or the battery pack temperature is greater than the second set temperature threshold, it is judged that the battery pack has no heating demand; otherwise, as long as the battery pack temperature is less than the second set temperature threshold, it is judged that the battery pack has heating demand.

[0014] The present application also provides a motor waste heat recovery control system, characterized in that: the control system operates according to the above-mentioned motor waste heat recovery control method, including:

[0015] An initial condition determination module, wherein the initial condition determination module determines whether an initial condition is satisfied based on a driving state of the vehicle;

[0016] A heating demand judgment module, which judges whether the current battery pack has a battery pack heating demand based on the temperature of the battery pack;

[0017] A heating mode determination module, which determines whether to use the residual heat of the motor when the battery pack has a heating demand and the allowable discharge power of the battery pack is greater than the power required for normal driving of the vehicle, and otherwise determines whether to use the residual heat of the motor;

[0018] The motor thermal state judgment module judges the thermal state of the motor when making a judgment on using the motor residual heat so as to make a control operation of not using the motor residual heat to heat the battery pack, recovering the motor residual heat to the battery pack or storing the motor heat.

[0019] According to a motor waste heat recovery control system provided by the present application, the motor thermal state judgment module includes:

[0020] A first control module, the first control module is used to perform a motor heat storage control operation when the motor temperature is between the first set temperature and the second set temperature for the first time after power-on or when the motor temperature is not the first time after power-on and is less than the second set temperature;

[0021] A second control module, the second control module is used to perform a control operation of recovering the residual heat of the motor to the battery pack when the temperature of the motor is between the first set temperature and the fourth set temperature for the first time after the motor is powered on or when the temperature of the motor is between the second set temperature and the third set temperature for the first time after the motor is powered on;

[0022] The third control module is used to perform a control operation of not using the motor waste heat to heat the battery pack when the motor temperature is between the third set temperature and the fourth set temperature for the first time after power-on or when the motor temperature is not the first time after power-on and is greater than the third set temperature.

[0023] According to a motor waste heat recovery control system provided by the present application, the heating demand judgment module includes:

[0024] A power-on status acquisition module, the power-on status acquisition module is used to determine whether the temperature of the battery pack enters the interval between the first set temperature threshold and the second set temperature threshold for the first time after power-on;

[0025] A heating requirement determination module is used to determine that the battery pack has no heating requirement when the battery pack enters the range of the first set temperature threshold and the second set temperature threshold for the first time after being powered on, or when the battery pack temperature exceeds the second set temperature threshold, otherwise, the battery pack has a heating requirement as long as the battery pack temperature is less than the second set temperature threshold.

[0026] The present application also provides a computer-readable storage medium, in which at least one program code is stored. The at least one program code is loaded and executed by a processor to implement the operations performed by the above-mentioned motor waste heat recovery control method.

[0027] The advantages of the present application are as follows: 1. The motor waste heat recovery of the present application first needs to compare and judge the allowable discharge power of the battery pack and the power required for normal driving of the vehicle. Only when the allowable discharge power of the battery pack is greater than the power required for normal driving of the vehicle, will a subsequent judgment be made whether to recover the motor waste heat. Because the recovery of the motor waste heat is too slow for the heating speed of the battery pack, when the allowable discharge power of the battery pack is not greater than the power required for normal driving of the vehicle, it is best to use PTC for heating at this time, so that the heating rate is fast, and the battery pack can quickly get rid of the low temperature bad state. When the allowable discharge power of the battery pack is greater than the power required for normal driving of the vehicle, the motor waste heat recovery can not affect the normal operation of the battery pack, does not affect the power performance of the vehicle, can effectively reduce the supply heating energy consumption, and has good real-time and versatility;

[0028] 2. After the conditions for motor waste heat recovery are met, the application determines the thermal state of the motor to determine whether the motor temperature is sufficient to recover the motor waste heat. If the motor temperature is not high, the motor waste heat cannot be effectively recovered. At this time, the motor heat storage operation is performed to increase the motor temperature to meet the motor usage requirements;

[0029] 3. This application determines the thermal state of the motor. Only when the motor is within the appropriate temperature range will the motor waste heat recovery operation be performed. This ensures that the normal operation of the motor will not be affected, and the battery pack will be well heated, so that the waste heat recovery effect is optimal;

[0030] 4. This application determines the thermal state of the motor. If the temperature of the motor is very high, if the motor is cooled only by recovering the waste heat from the motor, the cooling effect will be too poor and the cooling speed will be too slow, which will seriously affect the normal operation of the motor. At this time, a more reasonable cooling method is needed to dissipate the heat of the motor.

[0031] 5. The first set temperature of the present application is obtained based on the minimum cell temperature of the battery pack. By setting a value on the minimum cell temperature of the battery pack to obtain the first set temperature, the division of the set temperature can be more in line with the state of the battery pack, achieving a better waste heat recovery effect;

[0032] 6. This application is extremely simple and convenient for judging the heating demand of the battery pack. It distinguishes between the first power-on and the non-first power-on situations. The judgment result is more accurate and can better reflect the real state of the battery pack.

[0033] 7. The present application also provides a motor waste heat recovery control system. The motor waste heat recovery control system of the present application can be integrated into the control system of the automobile to achieve fully automated and intelligent operation control, greatly improving the richness of thermal management of electric vehicles, effectively recovering the motor waste heat, and not affecting the normal operation of the battery pack.

[0034] The motor waste heat recovery control method of the present application is applicable to electric vehicles, and can recycle the motor waste heat very well without affecting the normal operation of the battery pack, thus saving energy consumption for winter heating and having great promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 : Schematic diagram of the thermal management system of the motor and battery pack of this application;

[0036] Figure 2 : Flow chart of the motor waste heat recovery control method of the present application;

[0037] Figure 3 : Schematic diagram of judging the heating demand of the battery pack of the present application;

[0038] Figure 4 : Schematic diagram of motor thermal state determination in this application;

[0039] Among them: 1—battery pack; 2—heat exchanger; 3—battery pack circuit water pump; 4—four-way valve; 5—motor; 6—temperature sensor; 7—three-way valve; 8—motor radiator; 9—motor circuit water pump. DETAILED DESCRIPTION

[0040] The embodiments of the present invention are described in detail below, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0041] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] This application relates to a motor waste heat recovery control method, which is mainly used in the thermal management system of the battery pack and motor structure of electric vehicles. The control method of this application can recover the motor waste heat to the greatest extent without affecting the normal operation of the battery pack and the motor, effectively saving energy consumption for winter heating. Compared with the existing motor waste heat recovery method, the motor waste heat recovery control method of this application ensures that the battery pack can always be in the best working state, and the battery pack will not be unable to get out of low temperature in time due to motor waste heat recovery.

[0045] Specifically, the thermal management system structure involved in the motor waste heat recovery control method of the present application is as follows: Figure 1As shown, it includes a battery pack 1, a heat exchanger 2, a battery pack loop water pump 3, a four-way valve 4, a motor 5 (motor electronic control unit), a temperature sensor 6, a three-way valve 7 and a motor radiator 8, wherein the battery pack 1, the heat exchanger 2 and the battery pack loop water pump 3 form a battery pack loop, the motor 5, the temperature sensor 6, the three-way valve 7, the motor radiator 8 and the motor loop water pump 9 form a motor loop, and the battery pack loop and the motor loop are connected through the four-way valve 4; the liquid in the motor loop is driven by the motor loop water pump 9 to flow in the motor loop, and the liquid flowing out of the motor 5 first passes through The temperature sensor 6 at its outlet collects the temperature of the liquid flowing out of the motor 5, and then enters the three-way valve 7 through the four-way valve 4, flows out from the two outlets of the three-way valve 7, and the two branches flow in parallel, one branch returns to the motor 5, and the other branch flows through the motor radiator 8 and returns to the motor 5; for the battery pack loop, driven by the battery pack loop water pump 3, after the liquid flows out of the battery pack 1, it first enters the heat exchanger 2, and then flows back to the battery pack 1 through the four-way valve 4; when it is necessary to store heat for the motor, ① and ④ of the four-way valve 4 are connected, and ② and ③ are connected (such as Figure 1 As shown), the motor circuit water pump 9 is running, the battery pack circuit water pump 3 is turned off, the battery pack circuit and the motor circuit are completely isolated, and no heat exchange is performed between them; when the motor waste heat needs to be recovered for battery pack heating, ① and ② of the four-way valve 4 are connected, and ③ and ④ are connected (as shown). Figure 1 As shown), the motor circuit water pump 9 is running and the battery pack circuit water pump 3 is running. Under the coordinated action of the motor circuit water pump 9 and the battery pack circuit water pump 3, the liquid flowing out of the motor 5 flows into the battery pack circuit from the four-way valve 4 and enters the battery pack 1 to heat the battery pack 1. The liquid flowing out of the battery pack 1 flows back to the motor circuit after passing through the heat exchanger 2 and the four-way valve 4, and flows out from the two outlets of the three-way valve 7 through the three-way valve 7. The two branches flow in parallel, one branch returns to the motor 5, and the other branch flows through the motor radiator 8 and returns to the motor 5, and circulates to achieve the effect of motor waste heat recovery.

[0046] When the present application actually controls the above-mentioned thermal management system, Figure 2 As shown, a motor waste heat recovery control method comprises the following steps:

[0047] S1. When the vehicle is in motion, determine the heating requirement of the battery pack;

[0048] S2. If the battery pack heating demand is judged to be present, and the allowable discharge power of the battery pack is greater than the power required for normal driving of the vehicle, the thermal state of the motor is judged, and based on the thermal state of the motor, control operations are performed such as not using the motor waste heat to heat the battery pack, recovering the motor waste heat to the battery pack, or storing heat in the motor.

[0049] In some embodiments of the present application, this embodiment optimizes the above step S1. Specifically, Figure 3 As shown, it is determined whether the battery pack temperature (the minimum cell temperature of the battery pack) enters the first set temperature threshold (the first set temperature threshold is 0°C, which can be set according to actual needs) and the second set temperature threshold (the second set temperature threshold is 10°C, which can be set according to actual needs) interval for the first time after power-on (i.e. Figure 3 If the battery pack enters the range of the first set temperature threshold and the second set temperature threshold for the first time after power-on or the battery pack temperature is greater than the second set temperature threshold, it is judged that the battery pack has no heating requirement; otherwise, as long as the battery pack temperature is less than the second set temperature threshold, it is judged that the battery pack has heating requirement.

[0050] There are two situations for judging the heating demand of the battery pack, namely, the first temperature judgment after power-on and the non-first temperature judgment after power-on. The first temperature judgment after power-on is to avoid the inaccuracy caused by the deviation of the battery pack temperature just after power-on. By distinguishing between the first and non-first time, the control inaccuracy caused by this deviation can be eliminated.

[0051] In other embodiments of the present application, this embodiment optimizes the above step S2. Specifically, Figure 4 As shown, the method for controlling the operation of not using the residual heat of the motor to heat the battery pack, recovering the residual heat of the motor to the battery pack, or storing heat in the motor based on the thermal state of the motor is as follows: when the state of the battery pack requires heating, the thermal state of the motor is judged, because there are many situations of the thermal state of the motor, and the motor temperature is too high or too low, which does not meet the requirements of residual heat recovery, and different control operations need to be performed according to the thermal state of the motor;

[0052] If the motor temperature is between the first set temperature and the second set temperature for the first time after power-on or the motor temperature is not the first time after power-on and is lower than the second set temperature, a motor heat storage control operation is performed (such as Figure 4 The state shown in 3);

[0053] If the motor temperature is not between the first set temperature and the fourth set temperature for the first time after power-on or the motor temperature is between the second set temperature and the third set temperature for the first time after power-on, a control operation of recovering the motor waste heat to heat the battery pack is performed (such as Figure 4 The state shown in 2);

[0054] If the motor temperature is between the third set temperature and the fourth set temperature for the first time after power-on or the motor temperature is not the first time after power-on and is greater than the third set temperature, a control operation is performed without using the motor waste heat to heat the battery pack (such as Figure 4 The state shown in 1).

[0055] In this embodiment, the thermal state of the motor is acquired based on the temperature collected by the temperature sensor at the motor outlet. The judgment of the thermal state of the motor also distinguishes between the first temperature after power-on and the non-first temperature after power-on. In order to avoid inaccuracies caused by possible deviations in the first temperature test after power-on, the range of temperature judgment is relaxed.

[0056] The motor temperature is at the first set temperature for the first time after power-on (such as Figure 4 A) and a second set temperature (as shown Figure 4 B) shown in the figure or the motor temperature is not the first time after power-on and is less than the second set temperature, which proves that the temperature of the motor is very low at this time, and the motor itself may not have reached the optimal operating temperature. Therefore, in this case, it is necessary to first store heat in the motor to increase the temperature of the motor to the optimal operating temperature.

[0057] The motor temperature is not the first set temperature and the fourth set temperature for the first time after power-on (such as Figure 4 D) or the motor temperature is between the second set temperature and the third set temperature for the first time after power-on (such as Figure 4 C) shown in the figure, which proves that the temperature of the motor is appropriate at this time, the motor can operate normally, and the motor temperature reaches the requirement for recovering waste heat to heat the battery pack. The motor waste heat can be recovered to heat the battery pack.

[0058] The motor temperature is between the third set temperature and the fourth set temperature for the first time after power-on, or the motor temperature is not the first time after power-on and is greater than the third set temperature.

[0059] The first set temperature is set based on the minimum cell temperature of the battery pack, and the second set temperature is greater than the first set temperature.

[0060] The fourth set temperature is greater than the third set temperature, greater than the second set temperature, and greater than the first set temperature, which proves that the motor temperature is too high at this time. Although the motor generates a lot of heat, the high temperature of the motor has affected the normal operation of the motor. If the motor is cooled and dissipated by simply recovering the motor's waste heat, the requirement for rapid heat dissipation of the motor cannot be met. At this time, the motor needs to adopt other methods to dissipate heat and cool down. Therefore, in this case, the waste heat of the motor is no longer recovered, but other methods are used to dissipate heat and cool it.

[0061] The first set temperature of this embodiment is obtained by setting a value based on the minimum cell temperature of the battery pack. The set value of this embodiment is 2°C, and a suitable set value can be selected according to the needs. The subsequent second set value, third set value and fourth set value are set according to the structural state of the motor, and are 15°C, 35°C and 38°C respectively. Motors of different structures correspond to different set values, and a suitable set value can be selected according to the needs.

[0062] During actual control: when the vehicle is in a driving state, it is determined whether the battery pack temperature enters the interval between the first set temperature threshold and the second set temperature threshold for the first time after power-on. If the battery pack enters the interval between the first set temperature threshold and the second set temperature threshold for the first time after power-on or the battery pack temperature is greater than the second set temperature threshold, it is determined that the battery pack has no heating requirement. Otherwise, as long as the battery pack temperature is less than the second set temperature threshold, it is determined that the battery pack has a heating requirement. When the battery pack has a heating requirement, the temperature of the motor is collected. If the motor temperature is between the first set temperature and the second set temperature for the first time after power-on or the motor temperature is not the first time after power-on and is less than the second set temperature, a control operation of motor heat storage is performed. If the motor temperature is between the first set temperature and the fourth set temperature for the first time after power-on or the motor temperature is between the second set temperature and the third set temperature for the first time after power-on, a control operation of recovering the residual heat of the motor to heat the battery pack is performed. If the motor temperature is between the third set temperature and the fourth set temperature for the first time after power-on or the motor temperature is not the first time after power-on and is greater than the third set temperature, a control operation of not using the residual heat of the motor to heat the battery pack is performed.

[0063] In addition, the present application also relates to a motor waste heat recovery control system, including an initial condition judgment module, a heating demand judgment module, a heating mode judgment module and a motor thermal state judgment module, wherein the initial condition judgment module judges whether the initial condition is met based on the driving state of the vehicle; the heating demand judgment module judges whether the current battery pack has a battery pack heating demand based on the temperature of the battery pack; the heating mode judgment module makes a judgment on using the motor waste heat when the battery pack has a heating demand and the battery pack allows a discharge power greater than the power required for normal driving of the vehicle, otherwise it makes a judgment on not using the motor waste heat; the motor thermal state judgment module judges the thermal state of the motor when making a judgment on using the motor waste heat, so as to make a control operation of not using the motor waste heat to heat the battery pack, recovering the motor waste heat to the battery pack or storing motor heat.

[0064] Among them, the motor thermal state judgment module includes a first control module, a second control module and a third control module. The first control module is used to perform a control operation of storing heat in the motor when the motor temperature is between the first set temperature and the second set temperature for the first time after power-on, or when the motor temperature is not the first time after power-on and is less than the second set temperature; the second control module is used to perform a control operation of recovering the residual heat of the motor to the battery pack when the motor temperature is not the first time after power-on and is between the first set temperature and the fourth set temperature, or when the motor temperature is between the second set temperature and the third set temperature for the first time after power-on; the third control module is used to perform a control operation of not using the residual heat of the motor to heat the battery pack when the motor temperature is between the third set temperature and the fourth set temperature for the first time after power-on, or when the motor temperature is not the first time after power-on and is greater than the third set temperature.

[0065] The heating requirement judgment module includes a power-on status acquisition module and a heating requirement determination module. The power-on status acquisition module is used to determine whether the battery pack temperature enters the first set temperature threshold and the second set temperature threshold interval for the first time after power-on; the heating requirement determination module is used to determine that the battery pack has no heating requirement when the battery pack enters the first set temperature threshold and the second set temperature threshold interval for the first time after power-on or the battery pack temperature exceeds the second set temperature threshold; otherwise, as long as the battery pack temperature is less than the second set temperature threshold, the battery pack has a heating requirement.

[0066] The present application also relates to a computer-readable storage medium on which a program product capable of implementing the motor waste heat recovery control method described above in this specification is stored. In some possible implementations, various aspects of the present application can also be implemented in the form of a program product, which includes a program code. When the program product is run on a terminal device, the program code is used to enable the terminal device to execute the steps described in the above "Exemplary Method" section of this specification according to various exemplary implementations of the present application.

[0067] The storage medium of the present application stores a program product for implementing the above method, which can adopt a portable compact disk read-only memory (CD-ROM) and include program code, and can be run on a terminal device, such as a personal computer. However, the program product of the present application is not limited to this. In this document, a readable storage medium can be any tangible medium containing or storing a program, which can be used by or in combination with an instruction execution system, an apparatus or a device.

[0068] The program product may use any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0069] Computer readable signal media may include data signals propagated in baseband or as part of a carrier wave, in which readable program code is carried. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Readable signal media may also be any readable medium other than a readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0070] The program code embodied on the readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wired, optical cable, RF, etc., or any suitable combination of the foregoing.

[0071] Program code for performing the operations of the present application may be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, C++, etc., and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as a separate software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., using an Internet service provider to connect through the Internet).

[0072] As another aspect, the present application also provides an electronic device capable of implementing the above-mentioned motor waste heat recovery control method.

[0073] Those skilled in the art will appreciate that various aspects of the present application may be implemented as a system, method or program product. Therefore, various aspects of the present application may be specifically implemented in the following forms, namely: a complete hardware implementation, a complete software implementation (including firmware, microcode, etc.), or a combination of hardware and software, which may be collectively referred to as "circuit", "module" or "system" herein.

[0074] The electronic device is presented in the form of a general-purpose computing device. The components of the electronic device may include, but are not limited to: the at least one processing unit, the at least one storage unit, and a bus connecting different system components (including the storage unit and the processing unit).

[0075] The storage unit stores program codes, which can be executed by the processing unit, so that the processing unit executes the steps described in the above “Embodiment Method” section of this specification according to various exemplary implementations of the present application.

[0076] The storage unit may include a readable medium in the form of a volatile memory unit, such as a random access memory unit (RAM) and / or a cache memory unit, and may further include a read-only memory unit (ROM).

[0077] The storage unit may also include a program / utility having a set (at least one) of program modules, such program modules including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0078] The bus may represent one or more of several types of bus structures, including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

[0079] The electronic device may also communicate with one or more external devices (e.g., keyboards, pointing devices, Bluetooth devices, etc.), may also communicate with one or more devices that enable a user to interact with the electronic device, and / or may communicate with any device that enables the electronic device to communicate with one or more other computing devices (e.g., routers, modems, etc.). Such communication may be performed through an input / output (I / O) interface. Furthermore, the electronic device may also communicate with one or more networks (e.g., local area networks (LANs), wide area networks (WANs), and / or public networks, such as the Internet) through a network adapter. The network adapter communicates with other modules of the electronic device through a bus.

[0080] It should be understood that although not shown in the figures, other hardware and / or software modules may be used in conjunction with the electronic device, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0081] Through the description of the above implementation methods, it is easy for those skilled in the art to understand that the example implementation methods described here can be implemented by software or by combining software with necessary hardware. Therefore, the technical solution according to the implementation methods of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which can be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to the implementation methods of the present application.

[0082] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A motor waste heat recovery control method, Features: include, When the vehicle is in motion, determine the heating requirements for the battery pack; If the battery pack heating demand is judged to be there, and the allowable discharge power of the battery pack is greater than the power required for normal driving of the vehicle, the thermal state of the motor is judged, and control operations are made based on the thermal state of the motor to not use the motor waste heat to heat the battery pack, recover the motor waste heat to the battery pack, or store heat in the motor.

2. A motor waste heat recovery control method as claimed in claim 1, Features: The method for performing control operations based on the thermal state of the motor to heat the battery pack without using the motor waste heat, recover the motor waste heat to the battery pack, or store heat in the motor includes: if the motor temperature is between the first set temperature and the second set temperature for the first time after power-on, or if the motor temperature is not the first time after power-on and is less than the second set temperature, performing a control operation to store heat in the motor; the first set temperature is set based on the minimum cell temperature of the battery pack, and the second set temperature is greater than the first set temperature.

3. A motor waste heat recovery control method as claimed in claim 2, Features: The method for performing control operations based on the thermal state of the motor to heat the battery pack without using the motor waste heat, recover the motor waste heat to the battery pack, or store heat in the motor includes: if the motor temperature is not between the first set temperature and the fourth set temperature for the first time after power-on, or the motor temperature is between the second set temperature and the third set temperature for the first time after power-on, performing a control operation to recover the motor waste heat to heat the battery pack; the fourth set temperature is greater than the third set temperature, greater than the second set temperature, and greater than the first set temperature.

4. A motor waste heat recovery control method as claimed in claim 3, Features: The method for performing control operations based on the thermal state of the motor to heat the battery pack without using the waste heat of the motor, recover the waste heat of the motor to the battery pack, or store heat in the motor includes: if the motor temperature is between the third set temperature and the fourth set temperature for the first time after power-on, or if the motor temperature is not the first time after power-on and is greater than the third set temperature, performing control operations without using the waste heat of the motor to heat the battery pack.

5. A motor waste heat recovery control method as claimed in claim 2, Features: The first set temperature is obtained by setting a value based on the minimum cell temperature of the battery pack.

6. A motor waste heat recovery control method as claimed in claim 1, Features: The method for judging the heating requirement of the battery pack includes: judging whether the battery pack temperature enters the interval of the first set temperature threshold and the second set temperature threshold for the first time after power-on; if the battery pack enters the interval of the first set temperature threshold and the second set temperature threshold for the first time after power-on or the battery pack temperature is greater than the second set temperature threshold, judging that the battery pack has no heating requirement; otherwise, as long as the battery pack temperature is less than the second set temperature threshold, judging that the battery pack has heating requirement.

7. A motor waste heat recovery control system, Features: The control system is operated according to a motor waste heat recovery control method as claimed in any one of claims 1 to 6, including: An initial condition determination module, wherein the initial condition determination module determines whether an initial condition is satisfied based on a driving state of the vehicle; A heating demand judgment module, which judges whether the current battery pack has a battery pack heating demand based on the temperature of the battery pack; A heating mode determination module, which determines whether to use the residual heat of the motor when the battery pack has a heating demand and the allowable discharge power of the battery pack is greater than the power required for normal driving of the vehicle, and otherwise determines whether to use the residual heat of the motor; The motor thermal state judgment module judges the thermal state of the motor when making a judgment on using the motor residual heat so as to make a control operation of not using the motor residual heat to heat the battery pack, recovering the motor residual heat to the battery pack or storing the motor heat.

8. A motor waste heat recovery control system as claimed in claim 7, Features: The motor thermal state judgment module includes: A first control module, the first control module is used to perform a motor heat storage control operation when the motor temperature is between the first set temperature and the second set temperature for the first time after power-on or when the motor temperature is not the first time after power-on and is less than the second set temperature; A second control module, the second control module is used to perform a control operation of recovering the residual heat of the motor to the battery pack when the temperature of the motor is between the first set temperature and the fourth set temperature for the first time after the motor is powered on or when the temperature of the motor is between the second set temperature and the third set temperature for the first time after the motor is powered on; The third control module is used to perform a control operation of not using the motor waste heat to heat the battery pack when the motor temperature is between the third set temperature and the fourth set temperature for the first time after power-on or when the motor temperature is not the first time after power-on and is greater than the third set temperature.

9. A motor waste heat recovery control system as claimed in claim 7, Features: The heating demand judgment module includes: A power-on status acquisition module, the power-on status acquisition module is used to determine whether the temperature of the battery pack enters the interval between the first set temperature threshold and the second set temperature threshold for the first time after power-on; A heating requirement determination module is used to determine that the battery pack has no heating requirement when the battery pack enters the range of the first set temperature threshold and the second set temperature threshold for the first time after being powered on, or when the battery pack temperature exceeds the second set temperature threshold, otherwise, the battery pack has a heating requirement as long as the battery pack temperature is less than the second set temperature threshold.

10. A computer-readable storage medium, It is characterized in that The computer-readable storage medium stores at least one program code, and the at least one program code is loaded and executed by the processor to implement the operations performed by the motor waste heat recovery control method according to any one of claims 1 to 6.

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