Battery heating device, method and system and vehicle

Abstract

The invention discloses a battery heating device, method and system and a vehicle. The device comprises a battery unit group, a pre-charging circuit, a motor control circuit and a motor assembly which are electrically connected in sequence. The device comprises a battery pipeline arranged on the periphery of a battery unit group, a motor controller pipeline arranged on the periphery of a motor control circuit, a motor pipeline arranged on the periphery of a motor assembly, a circulating water tank and a water pump. The battery pipeline, the motor controller pipeline, the motor pipeline, the circulating water tank and the water pump are sequentially connected in series through the circulating water pipeline to form a circulating loop, so that the water pump controls circulating liquid to flow in the circulating loop. According to the technical scheme, energy waste of the electric vehicle is reduced, the utilization rate of electric quantity of the electric vehicle is improved, and endurance is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and in particular to a battery heating device, method, system and vehicle. Background Art

[0002] With the continuous advancement of electric vehicle technology, electric vehicles are becoming increasingly popular due to their economical and practical features. The vigorous promotion of electric vehicles will inevitably require coverage in different regions, including areas that are adapted to lower winter temperatures.

[0003] Because mainstream lithium-ion batteries used in electric vehicles currently have poor low-temperature characteristics, electric vehicle batteries require appropriate heating. Current mainstream battery heating solutions primarily rely on physical heating methods, employing additional, inefficient heating devices and solutions for external battery heating. However, this also consumes the vehicle's electrical energy, increasing energy consumption and reducing battery life. Summary of the Invention

[0004] The present application provides a battery heating device, method, system and vehicle to reduce energy waste in electric vehicles, improve the utilization rate of electric vehicle power and ensure battery life.

[0005] According to a first aspect of an embodiment of the present application, a battery heating device is provided, characterized in that the device includes a battery cell group, a pre-charging circuit, a motor control circuit, and a motor assembly electrically connected in sequence;

[0006] The device includes a battery pipeline arranged on the periphery of the battery cell group, a motor controller pipeline arranged on the periphery of the motor control circuit, a motor pipeline arranged on the periphery of the motor assembly, a circulating water tank and a water pump;

[0007] The battery pipeline, the motor controller pipeline, the motor pipeline, the circulating water tank and the water pump are sequentially connected in series through the circulating water pipeline to form a circulating loop, so that the water pump controls the circulating fluid to flow in the circulating loop;

[0008] The motor control circuit includes a three-phase full-bridge conversion circuit and a capacitor component; the capacitor component is arranged in parallel on the DC side of the three-phase full-bridge conversion circuit;

[0009] The device further includes a heating control switch assembly, a first end of the heating control switch assembly is electrically connected to the second plate of the capacitor assembly, and a second end of the heating control switch assembly is electrically connected to the neutral point of the motor assembly.

[0010] The pre-charging circuit includes a first switch component, a second switch component, a third switch component, a pre-charging resistor and a fuse component;

[0011] A first end of the first switch assembly is electrically connected to a first end of the battery cell group, and a second end of the first switch assembly is electrically connected to a first end of the fuse assembly;

[0012] The second end of the fuse assembly is electrically connected to the first plate of the capacitor assembly;

[0013] A first end of the second switch component is electrically connected to the first end of the first switch component, and a second end of the second switch component is electrically connected to the first end of the pre-charging resistor;

[0014] The second end of the pre-charging resistor is electrically connected to the second end of the first switch component;

[0015] The first end of the third switch assembly is electrically connected to the second end of the battery cell group, and the second end of the third switch assembly is electrically connected to the second plate of the capacitor assembly.

[0016] The motor assembly is equivalent to three reactance elements connected in star shape;

[0017] Each phase of a three-phase full-bridge conversion circuit connected to three reactance elements includes two switching tube elements.

[0018] The battery cell group includes a plurality of battery modules arranged in series.

[0019] According to a second aspect of an embodiment of the present application, a battery heating method is provided, the method comprising:

[0020] Get the current ambient temperature outside the vehicle;

[0021] In response to a heating instruction sent by the user to the current vehicle, the battery heating device described in the embodiment of the first aspect of the present application is controlled to operate according to the ambient temperature.

[0022] According to a third aspect of an embodiment of the present application, a battery heating system is provided, the system comprising:

[0023] The temperature acquisition module is used to obtain the current ambient temperature outside the vehicle;

[0024] The heating control module is used to respond to the heating instruction sent by the user to the current vehicle and control the battery heating device described in the embodiment of the first aspect of the present application to operate according to the ambient temperature.

[0025] According to a fourth aspect of the embodiments of the present application, a vehicle is provided, wherein the vehicle is provided with a battery heating system provided by the embodiment of the third aspect of the present application, and a battery heating device provided by the embodiment of the first aspect of the present application.

[0026] The technical solution of the embodiment of the present application has the ability to achieve short-term operation of high current using as little electricity as possible. It can be identified according to the ambient temperature conditions and the heating needs of the battery, and execute whether to use a single branch of the inductance in the motor assembly to work, a dual branch or three branches to work simultaneously, so that the battery cell is heated from the inside to the outside by self-heating. At the same time, the motor controller and the motor housing will heat the circulating fluid during this period, and the heat can also be transferred to the battery housing for heating through the water pump. In this way, simultaneous heating of the inside and outside of the battery cell is achieved, shortening the battery heating operation time, reducing the waste of energy in electric vehicles, improving the utilization rate of electric vehicle power, and ensuring battery life.

[0027] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] Figure 1 A schematic diagram of a circulation loop of a battery heating device provided in an embodiment of the present application;

[0030] Figure 2 A schematic diagram of the circuit portion of the battery heating device provided in an embodiment of the present application;

[0031] Figure 3 This is a flow chart of a battery heating method provided in an embodiment of the present application;

[0032] Figure 4 A schematic structural diagram of a battery heating system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] Figure 1 This is a schematic diagram of a circulation loop of a battery heating device provided in an embodiment of the present application. Figure 2 This is a schematic diagram of the circuit portion of the battery heating device provided in the embodiment of the present application. The embodiments of the present application can be applied to the battery heating of electric vehicles, such as Figure 1 and Figure 2 As shown, the details are as follows:

[0036] The battery heating device provided in the embodiment of the present application includes a battery cell group 201 , a pre-charging circuit 202 , a motor control circuit 203 and a motor assembly 204 which are electrically connected in sequence.

[0037] The device includes a battery pipeline A arranged on the periphery of the battery cell group 201, a motor controller pipeline B arranged on the periphery of the motor control circuit 203, a motor pipeline C arranged on the periphery of the motor assembly 204, a circulating water tank D and a water pump E.

[0038] The battery line A, motor controller line B, motor line C, circulating water tank D, and water pump E are sequentially connected in series through the circulating water pipe F to form a circulation loop, so that the water pump controls the flow of circulating fluid in the circulation loop. The embodiment of the present application does not limit the flow direction of the circulating fluid in the circulation loop.

[0039] The motor control circuit 203 includes a three-phase full-bridge conversion circuit and a capacitor component C1 ; the capacitor component is connected in parallel on the DC side of the three-phase full-bridge conversion circuit.

[0040] The device further includes a heating control switch assembly K4, a first end of which is electrically connected to the second plate of the capacitor assembly C1, and a second end of which is electrically connected to the neutral point N of the motor assembly. The heating control switch assembly K4 can be a high-voltage relay.

[0041] In one embodiment, the pre-charging circuit includes a first switch component K1, a second switch component K2, a third switch component K3, a pre-charging resistor R1 and a fuse component F1;

[0042] A first end of the first switch assembly K1 is electrically connected to a first end of the battery cell group 201 , and a second end of the first switch assembly K2 is electrically connected to a first end of the fuse assembly F1 ;

[0043] The second end of the fuse assembly F1 is electrically connected to the first plate of the capacitor assembly C1;

[0044] A first end of the second switch component K2 is electrically connected to a first end of the first switch component K1, and a second end of the second switch component K2 is electrically connected to a first end of the pre-charging resistor R1;

[0045] The second end of the pre-charging resistor R1 is electrically connected to the second end of the first switch component K1;

[0046] The selection of capacitors and resistors in each embodiment of the present application can be selected according to the specific conditions of the vehicle, and the fuse can be a suitable circuit safety device such as a fuse, which is not limited in the embodiments of the present application.

[0047] A first end of the third switch assembly K3 is electrically connected to the second end of the battery cell group 201 , and a second end of the third switch assembly K3 is electrically connected to the second electrode plate of the capacitor assembly C1 .

[0048] Among them, each switch component can adopt any switch element in the relevant technology, such as a relay, and the embodiment of the present application is not limited here.

[0049] In one embodiment, the motor assembly is equivalent to three reactive elements (such as Figure 2 L1, L2 and L3) are star-connected; each phase of the three-phase full-bridge conversion circuit connected to the three reactance elements includes two switching tube elements, such as Figure 2 Q1, Q2, Q3, Q4, Q5, and Q6 are shown in FIG. The first switch tube Q1 and the second switch tube Q2 are electrically connected to the first reactor L1 to provide AC power to the first reactor L1; the third switch tube Q3 and the fourth switch tube Q4 are electrically connected to the second reactor L2 to provide AC power to the second reactor L2; and the fifth switch tube Q5 and the sixth switch tube Q6 are electrically connected to the third reactor L3 to provide AC power to the third reactor L3. The switches Q1, Q2, Q3, Q4, Q5, and Q6 can be electronic switches such as power MOSFETs, but this embodiment of the application does not limit this.

[0050] The embodiment of the present application also includes a first current sensor CS1 for detecting the current value of the first reactor L1; a second current sensor CS2 for detecting the current value of the second reactor L2; and a third current sensor CS3 for detecting the current value of the third reactor L3.

[0051] In one embodiment, the battery cell group may include a plurality of battery assemblies arranged in series, that is, the high-voltage battery of the electric vehicle to which this case is applicable.

[0052] Based on the above embodiments, Figure 3 This is a flow chart of a battery heating method provided in an embodiment of the present application. The battery heating method provided in an embodiment of the present application utilizes the battery heating devices provided in the aforementioned embodiments to heat a vehicle battery. The method is applicable to heating the battery of an electric vehicle. The details are as follows:

[0053] S310: Obtain the current ambient temperature outside the vehicle.

[0054] The current vehicle may be any electric vehicle equipped with the battery heating device described in the above embodiments. The ambient temperature outside the vehicle may be the temperature at the location of the current vehicle. The ambient temperature may be acquired by a temperature sensor provided on the current vehicle. This application does not limit the process or method for acquiring the ambient temperature.

[0055] S320 : In response to a heating instruction sent by the user to the current vehicle, control the battery heating device to operate according to the ambient temperature.

[0056] The heating command can be used to activate battery heating in the vehicle. Users can control this via the vehicle computer or remotely via a mobile device. For example, to prevent poor battery performance due to cold weather, the user can remotely control the vehicle to activate battery heating before getting in the vehicle. When the battery temperature reaches a suitable temperature for performance, the user can then start the vehicle and drive.

[0057] In an optional embodiment, controlling the battery heating device to operate according to the ambient temperature in S320 may include:

[0058] In response to the ambient temperature being within the first temperature range, controlling any one of the three reactance elements of the motor assembly in the battery heating device to operate;

[0059] In response to the ambient temperature being within the second temperature range, controlling any two of the three reactive elements of the motor assembly to operate;

[0060] In response to the ambient temperature being within a third temperature interval, controlling the three reactance elements of the motor assembly to operate;

[0061] The first temperature range is greater than the second temperature range, and the second temperature range is greater than the third temperature range.

[0062] In a further optional embodiment, the step of controlling the battery heating device to heat the battery cell group according to the ambient temperature in S320 may further include:

[0063] In response to the ambient temperature belonging to the second temperature range or the ambient temperature belonging to the third temperature range, the water pump in the battery heating device is controlled to operate so that the heat dissipated by the motor control circuit and the motor assembly in the battery heating device is transferred to the battery cell group through the circulating water.

[0064] Combining the above two embodiments, it can be understood that when any one of the three reactance elements (L1, L2 and L3) in the motor assembly is turned on and working, it actually makes the battery cell group work to provide electrical energy. After the battery starts working, it will generate a certain amount of heat due to its own characteristics. Then, when the ambient temperature is not too low, the battery can maintain good performance only through the heat generated by the battery itself, and there is no need for external heating. Therefore, when the ambient temperature belongs to the first temperature range, only controlling any one reactance element to work can make the battery self-heating. For example, when the ambient temperature belongs to the first temperature range of -5 to 0°C, by controlling Q1 and Q4, L1 is made to work. At this time, the self-heating of the battery can meet the needs of maintaining good performance.

[0065] When the ambient temperature is low and the heat generated solely by the battery's own operation is insufficient to maintain good battery performance, any two reactance components in the motor assembly can be put into operation. The reactance's copper wire loss and core loss can be converted into heat through the circulating fluid and the operation of the water pump, bringing the heat to the battery pipes of the battery cell group, thereby providing external heating for the battery. For example, when the ambient temperature is in the second temperature range of -15 to -5°C, by controlling Q1, Q4 and Q2, Q5 to operate L1 and L2, the self-heating of the battery and the heat emitted by the motor assembly and transferred to the battery through the circulation loop can maintain good battery performance.

[0066] Similarly, when the ambient temperature is very low, all three reactance components in the motor assembly can be operated. The copper wire loss and core loss of the reactance, as well as the switching loss and conduction loss of all switching elements, will also be converted into heat and transferred to the battery through the circulating fluid in the circulation loop, thereby heating the battery. For example, when the ambient temperature is below the third temperature range of -15°C, by controlling Q1, Q4, Q2, Q5, Q3, Q6, and making L1, L2, and L3 all operate, the self-heating of the battery and the heat generated by the motor assembly and transferred to the battery through the circulation loop can maintain good battery performance.

[0067] In a further optional embodiment, the method may further include: obtaining a reactance current of the reactance element; and adjusting a duty cycle of a switch element corresponding to the reactance element in the three-phase full-bridge conversion circuit according to the reactance current.

[0068] During operation, the reactive elements (L1, L2, and L3) can detect current values ​​in real time via current sensors (CS1, CS2, and CS3). By adjusting the duty cycle of the switching elements corresponding to each reactive element, the current flowing through the reactive element is adjusted, thereby controlling heating. For example, based on the current value collected by CS1, if it does not meet a preset current threshold, the duty cycle of Q1 and / or Q4 is adjusted to ensure that the current value of L1 meets the preset current threshold.

[0069] Based on the aforementioned embodiments, the present application provides a preferred embodiment, which summarizes and / or supplements the aforementioned embodiments, as follows.

[0070] When the electric vehicle does not need to be started by heating, the high-voltage negative relay K4 in the motor control circuit 203 is in the disconnected state. At this time, the motor control circuit 203 and the motor assembly 204 are in the normal motor driving and power generation state to drive the vehicle.

[0071] When the current vehicle recognizes a low temperature environment and needs to run the battery heating mode, after the motor control circuit 203 receives the heating instruction from the vehicle control unit (VCU), the control unit inside the motor control circuit 203 first closes the high-voltage negative relay K4, so that the neutral point of the motor is connected to the negative pole of the battery 201 to form a new high-voltage circuit; the vehicle controller VCU receives the closed state feedback information of the high-voltage negative relay K4 fed back by the motor control circuit 203; the vehicle controller and the battery 201 controller BMS start to execute the high-voltage power supply process, and the pre-charge positive relay K2 and the negative relay K3 in the pre-charge circuit 202 are closed first. At this time, the voltage across the high-voltage capacitor C1 in the motor control circuit 203 gradually increases to a voltage close to the voltage of the battery 201; the vehicle controller and the controller of the battery 201 judge that the pre-charge process is completed based on the C1 voltage fed back by the motor control circuit 203, and then close. Close the high-voltage main positive relay K1; the voltage of the battery 201 is applied to the high-voltage controller Q1~Q6 switch tubes, and the six switch tubes Q1~Q6 of the motor controller execute the opening of Q1 or the opening of Q1 and Q2, or the opening of Q1, Q2 and Q3 in several different working modes (the number of opened inductors is different) according to the instructions of the control unit; the switch tube of the motor control circuit 203 and the three-phase inductors L1, L2 and L3 of the motor component 204 constitute three BUCK circuits (step-down conversion circuits), and these three circuits can be individually controlled to output different currents as needed; the motor control circuit 203 and the motor component 204 can now continue to operate according to the maximum current of the system; when the maximum current is running, all the battery cells inside the battery 201 begin to heat up due to the current flowing through them.

[0072] When the heating condition is in operation, the copper wire loss and core loss of L1, L2 and L3 in the motor are converted into heat for shell heating. The six switching tubes in the motor control circuit 203 will also cause switching loss and conduction loss due to the large current operation. These losses will also heat the motor pipeline and the motor controller pipeline, thereby conducting the heat to the outside of the battery with the help of the circulating fluid to perform external heating for the battery; at this time, the vehicle controller can start the water pump 106 and control the flow of the circulating pipeline according to the temperature feedback from the motor control circuit 203 and the motor assembly 204, and circulate the circulating fluid heated by the motor control circuit 203 and the motor assembly 204 through the entire circulating pipeline to realize external heating of the battery 204 through the circulation loop.

[0073] The technical solution of the embodiment of the present application has the ability to achieve short-term operation of high current using as little electricity as possible. It can be identified according to the ambient temperature conditions and the heating needs of the battery, and execute whether to use a single branch of the inductance in the motor assembly to work, a dual branch or three branches to work simultaneously, so that the battery cell is heated from the inside to the outside by self-heating. At the same time, the motor controller and the motor housing will heat the circulating fluid during this period, and the heat can also be transferred to the battery housing for heating through the water pump. In this way, simultaneous heating of the inside and outside of the battery cell is achieved, shortening the battery heating operation time, reducing the waste of energy in electric vehicles, improving the utilization rate of electric vehicle power, and ensuring battery life.

[0074] In addition, since the motor control circuit has been running for a period of time during the heating process, the temperature of each semiconductor device inside the motor controller has risen, thereby ensuring the activity of each power semiconductor device and preventing the problem of low activity and poor performance (such as voltage resistance drop) of the power semiconductor due to too low temperature. At this time, the vehicle startup motor controller can run at full power without worrying about the risk of overvoltage.

[0075] Figure 4 This is a schematic diagram of the structure of a battery heating system provided in an embodiment of the present application. Figure 4 As shown, the system 400 includes:

[0076] The temperature acquisition module 410 is used to obtain the current ambient temperature outside the vehicle;

[0077] The heating control module 420 is used to control the battery heating device to operate according to the ambient temperature in response to a heating instruction sent by the user to the current vehicle.

[0078] In a further embodiment, the heating control module 420 may include:

[0079] a first operating mode unit, configured to control any one of the three reactance elements of the motor assembly in the battery heating device to operate in response to the ambient temperature being within a first temperature range;

[0080] a second operating mode unit for controlling any two of the three reactance elements of the motor assembly to operate in response to the ambient temperature belonging to the second temperature range;

[0081] a third operating mode unit, configured to control the three reactance elements of the motor assembly to operate in response to the ambient temperature belonging to a third temperature range;

[0082] The first temperature range is greater than the second temperature range, and the second temperature range is greater than the third temperature range.

[0083] In a further embodiment, the heating control module 420 may also be used to:

[0084] In response to the ambient temperature belonging to the second temperature range or the ambient temperature belonging to the third temperature range, the water pump in the battery heating device is controlled to operate so that the heat dissipated by the motor control circuit and the motor assembly in the battery heating device is transferred to the battery cell group through the circulating water.

[0085] In another embodiment, the system 400 may further include:

[0086] A reactance current acquisition module, used to obtain the reactance current of the reactance element;

[0087] The duty cycle adjustment module is used to adjust the duty cycle of the switching tube element corresponding to the reactance element in the three-phase full-bridge conversion circuit according to the reactance current.

[0088] The battery heating system provided in the embodiments of the present application can execute the battery heating method provided in any embodiment of the present application, and has the corresponding functional modules and beneficial effects for executing each battery heating method.

[0089] Based on the above-mentioned embodiments in the embodiments of the present application, the present application also provides a vehicle, in particular an electric energy vehicle, which is provided with the battery heating system involved in the aforementioned embodiments and the battery heating device involved in the aforementioned embodiments, so that the vehicle can implement a battery heating method as described in the aforementioned embodiments.

[0090] In some embodiments, the battery heating method can be implemented as a computer program that is tangibly contained in a computer-readable storage medium, such as a memory unit. In some embodiments, part or all of the computer program can be loaded and / or installed into the vehicle via a ROM and / or a communication unit. When the computer program is loaded into RAM and executed by the vehicle's processor, one or more steps of the battery heating method described above can be performed. Alternatively, in other embodiments, the vehicle's processor can be configured to execute the battery heating method in any other suitable manner (e.g., via firmware).

[0091] Various embodiments of the systems and techniques described herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), system-on-chip systems (SOCs), programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include being implemented in one or more computer programs that are executable and / or interpreted on a programmable system that includes at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0092] Computer programs for implementing the methods of the present application may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when the computer program is executed by the processor, the functions / operations specified in the flowcharts and / or block diagrams are implemented. The computer program may be executed entirely on the machine, partially on the machine, as a stand-alone software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0093] In the context of the present application, a computer-readable storage medium can be a tangible medium that can contain or store a computer program for use by an instruction execution system, device or equipment or used in combination with an instruction execution system, device or equipment. A computer-readable storage medium can include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium can be a machine-readable signal medium. A more specific example of a machine-readable storage medium can include an electrical connection based on one or more lines, a portable computer 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 foregoing.

[0094] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0095] The systems and techniques described herein can be implemented in a computing system that includes back-end components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes front-end components (e.g., a user computer with a graphical user interface or web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such back-end components, middleware components, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0096] A computing system may include clients and servers. The clients and servers are typically remote from each other and typically interact via a communication network. This client-server relationship arises through computer programs running on the respective computers, creating a client-server relationship. The server may be a cloud server, also known as a cloud computing server or cloud host. This server is a hosting product within the cloud computing service ecosystem that addresses the management difficulties and limited scalability of traditional physical hosting and VPS services.

[0097] The present application also discloses a computer program product, comprising a computer program that, when executed by a processor, implements the battery heating method provided in any of the embodiments of the present application. This program product shares the same inventive concept as the battery heating method disclosed in each embodiment of the present application and is therefore not further described here.

[0098] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this application can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of this application can be achieved. This is not limited herein.

[0099] The above specific embodiments do not constitute a limitation on the scope of protection of this application. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application shall be included within the scope of protection of this application.

Claims

1. A battery heating device, characterized in that: The device includes a battery cell group, a pre-charging circuit, a motor control circuit and a motor assembly electrically connected in sequence; The device includes a battery pipeline arranged at the periphery of the battery cell group, a motor controller pipeline arranged at the periphery of the motor control circuit, a motor pipeline arranged at the periphery of the motor assembly, and a circulating water tank and a water pump; The battery pipeline, the motor controller pipeline, the motor pipeline, the circulating water tank and the water pump are sequentially connected in series through a circulating water pipeline to form a circulating loop, so that the water pump controls the circulating liquid to flow in the circulating loop; The motor control circuit comprises a three-phase full-bridge conversion circuit and a capacitor component; the capacitor component is arranged in parallel on the DC side of the three-phase full-bridge conversion circuit; The device also includes a heating control switch component, a first end of the heating control switch component is electrically connected to the second plate of the capacitor component, and a second end of the heating control switch component is electrically connected to the neutral point of the motor component.

2. The battery heating device according to claim 1, characterized in that: The pre-charging circuit comprises a first switch component, a second switch component, a third switch component, a pre-charging resistor and a fuse component; The first end of the first switch assembly is electrically connected to the first end of the battery cell group, and the second end of the first switch assembly is electrically connected to the first end of the fuse assembly; The second end of the fuse assembly is electrically connected to the first plate of the capacitor assembly; The first end of the second switch component is electrically connected to the first end of the first switch component, and the second end of the second switch component is electrically connected to the first end of the pre-charging resistor; The second end of the pre-charging resistor is electrically connected to the second end of the first switch component; A first end of the third switch assembly is electrically connected to a second end of the battery cell group, and a second end of the third switch assembly is electrically connected to a second electrode plate of the capacitor assembly.

3. The battery heating device according to claim 1, characterized in that: The motor assembly is equivalent to three reactance elements connected in star shape; Each phase of the three-phase full-bridge conversion circuit connected to the three reactance elements includes two switching tube elements.

4. The battery heating device according to claim 1, characterized in that: The battery cell group includes a plurality of battery assemblies arranged in series.

5. A battery heating method, characterized in that: The method comprises: Get the current ambient temperature outside the vehicle; In response to a heating instruction sent by a user to the current vehicle, the battery heating device according to any one of claims 1 to 4 is controlled to operate according to the ambient temperature.

6. The method according to claim 5, characterized in that The step of controlling the battery heating device to operate according to the ambient temperature includes: In response to the ambient temperature belonging to the first temperature interval, controlling any one of the three reactance elements of the motor assembly in the battery heating device to operate; In response to the ambient temperature belonging to the second temperature interval, controlling any two of the three reactance elements of the motor assembly to operate; In response to the ambient temperature belonging to a third temperature interval, controlling three reactance elements of the motor assembly to operate; The first temperature range is greater than the second temperature range, and the second temperature range is greater than the third temperature range.

7. The method according to claim 6, characterized in that The step of controlling the battery heating device to heat the battery cell group according to the ambient temperature further includes: In response to the ambient temperature belonging to the second temperature interval or the ambient temperature belonging to the third temperature interval, the water pump in the battery heating device is controlled to work so that the heat dissipated by the motor control circuit and the motor assembly in the battery heating device is transferred to the battery cell group through circulating water.

8. The method according to claim 6, characterized in that The method further comprises: Obtaining the reactance current of the reactance element; According to the reactance current, the duty cycle of the switch tube element corresponding to the reactance element in the three-phase full-bridge conversion circuit is adjusted.

9. A battery heating system, characterized in that: The system comprises: A temperature acquisition module is used to obtain the current ambient temperature outside the vehicle; A heating control module is used to control the battery heating device according to any one of claims 1 to 4 to operate according to the ambient temperature in response to a heating instruction sent by a user to the current vehicle.

10. A vehicle, characterized in that: The vehicle is provided with a battery heating system as claimed in claim 9 and a battery heating device as claimed in any one of claims 1 to 4.

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