Battery self-heating method, electronic equipment, storage medium and program product

Abstract

The invention discloses a battery self-heating method, electronic equipment, a storage medium and a program product, the battery self-heating method is applied to charging equipment, the charging equipment comprises a charging device and a modulation device, the power supply output end of the charging device is connected with the power supply input end of the modulation device, and the method comprises the following steps: controlling the modulation device to modulate the output voltage of the charging device; an alternating current is generated; and alternating current is output through the power supply output end of the modulation device. Charging and self-heating of the battery at low temperature are realized, the self-heating rate of the battery is improved, and the charging time is shortened.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and in particular relates to a battery self-heating method, an electronic device, a non-transitory computer-readable storage medium, and a computer program product. Background Art

[0002] As people pay more and more attention to environmental protection and low carbon, the pace of development of new energy vehicles has also accelerated significantly. The integration of automobiles with related technologies in the fields of energy, transportation, information and communications has accelerated, and electrification, networking and intelligence have become the development trend of the automobile industry. New technologies for new energy vehicles have sprung up, for example:

[0003] The application number is CN202410658157.7, the publication number is CN118238797B, and the invention name is New Energy Vehicle Energy Intelligent Management System, Control Method and Related Equipment;

[0004] The application number is CN202410672579.X, the publication number is CN118597091A, and the invention name is "New Energy Vehicle Energy Intelligent Management Method, System and Related Equipment";

[0005] The application number is CN202010470247.5, the publication number is CN113734146B, and the invention name is vehicle driving mode selection method, device, equipment and medium;

[0006] They all describe hybrid technology that is mainly electric, and has multiple advantages such as being fast, economical, quiet, smooth, and green.

[0007] The application number is CN202211678720.4, the publication number is CN117382629B, and the invention name is vehicle power control method, device, medium, vehicle controller and vehicle;

[0008] The application number is CN202311164098.X, the publication number is CN116890770B, and the invention name is vehicle control system, method and vehicle;

[0009] The application number is CN202311170393.6, the publication number is CN117533292B, and the invention name is vehicle control system, control method, controller and vehicle;

[0010] Both describe a new energy power system with four wheel-side motors independently driven as the core, which greatly improves the safety and power of new energy vehicles.

[0011] Batteries play a vital role in many areas of modern society. Batteries provide power for mobile electronic devices such as smartphones and electric vehicles such as electric cars, ensuring the performance and endurance of the equipment. During the use of batteries, electric energy is constantly consumed and replenished, and higher and more efficient charging efficiency is the goal that related industries have been pursuing.

[0012] Charging piles can provide efficient charging for electric vehicles, but in low temperature environments, the charging and discharging performance of electric vehicle batteries will be weakened to a certain extent, and efficient charging cannot be achieved. It is necessary to quickly get rid of the low temperature environment to improve the charging and discharging performance of the battery. Summary of the invention

[0013] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a battery self-heating method, an electronic device, a non-transitory computer-readable storage medium, and a computer program product, which can realize charging and self-heating of the battery in a low temperature environment, improve the self-heating rate of the battery, and enable the battery to quickly get rid of the low temperature and restore efficient charging and discharging performance.

[0014] In a first aspect, the present application provides a battery self-heating method, comprising controlling the modulation device to modulate the output voltage of the charging device to generate alternating current; and outputting the alternating current through the power supply output end of the modulation device.

[0015] In a second aspect, the present application provides an electronic device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned battery self-heating method when executing the program.

[0016] In a third aspect, the present application provides a non-transitory computer-readable storage medium having a computer program stored thereon, which implements the above-mentioned battery self-heating method when executed by a processor.

[0017] In a fourth aspect, the present application provides a computer program product, including a computer program, which implements the above-mentioned battery self-heating method when executed by a processor.

[0018] The battery self-heating method, electronic device, non-transitory computer-readable storage medium and computer program product provided in the embodiments of the present application modulate the output voltage of the charging device through a modulation device, convert the output voltage of the charging device into alternating current, and then output the alternating current to the device to be charged. In a low temperature environment, the device to be charged can withstand a larger amount of alternating current than direct current, and the thermal effect generated by the alternating current acting on the internal resistance of the device to be charged is greater than the thermal efficiency generated by the direct current acting on the internal resistance of the device to be charged. The alternating current makes the self-heating rate of the device to be charged higher, so that the device to be charged can be quickly heated up, the charging and discharging performance of the device to be charged is improved, and the overall charging time of the device to be charged is reduced.

[0019] Additional aspects and advantages of the embodiments of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 This is an application scenario diagram of the battery self-heating method provided in an embodiment of the present application;

[0022] Figure 2 It is a first flow chart of the battery self-heating method provided in an embodiment of the present application;

[0023] Figure 3 is a second flow chart of the battery self-heating method provided in an embodiment of the present application;

[0024] Figure 4 is a third flow chart of the battery self-heating method provided in an embodiment of the present application;

[0025] Figure 5 is a fourth flow chart of the battery self-heating method provided in an embodiment of the present application;

[0026] Figure 6 is a fifth flow chart of the battery self-heating method provided in an embodiment of the present application;

[0027] Figure 7 is a sixth flow chart of the battery self-heating method provided in an embodiment of the present application;

[0028] Figure 8 7 is a schematic diagram of a seventh process flow of a battery self-heating method provided in an embodiment of the present application;

[0029] Fig. 9 8 is a schematic diagram of the eighth process of the battery self-heating method provided in the embodiment of the present application;

[0030] Fig.10 is a module schematic diagram of a battery self-heating device provided in an embodiment of the present application;

[0031] Fig.11 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0032] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0033] For ease of understanding, the technical background and application scenarios of this application are first introduced below:

[0034] Batteries can effectively store energy, store electricity when there is an oversupply of energy, and release electricity when energy demand peaks or supply is insufficient. Batteries are the core components of electric vehicles. With the continuous advancement of battery technology, especially the improvement of energy density and reduction of cost of lithium-ion batteries, the market share of electric vehicles has increased year by year. This not only reduces the dependence of transportation on traditional fossil fuels and reduces greenhouse gas emissions, but also provides people with a cleaner and quieter way to travel.

[0035] The limited range of electric vehicles has always been a key concern. The widespread layout of charging piles will allow electric vehicle users to charge in time when the battery is low, just as convenient as refueling a fuel car, thus effectively alleviating users' range anxiety.

[0036] In a low temperature environment, the activity of the chemical reaction inside the battery decreases and the electrode material may be damaged, resulting in an increase in the internal resistance of the battery, a slowdown in the chemical reaction rate inside the battery, and a decrease in the charging and discharging efficiency, which will affect the charging efficiency of the electric vehicle and, in turn, the user experience.

[0037] See also Figure 1 , Figure 1 1 is an application scenario diagram of a battery self-heating method provided in an embodiment of the present application. The application scenario provided in the present application includes a charging device 200, a device to be charged 100 and an electronic device 300.

[0038] The device to be charged 100 is a device for receiving and storing electrical energy. Optionally, the device to be charged may be a battery pack or a battery module composed of one or more battery cells. For example, the device to be charged may be a power battery of an electric vehicle, which provides power for the motor of the vehicle, and its performance directly determines the key indicators of the electric vehicle, such as the cruising range and acceleration performance. In a low temperature environment, the performance of the power battery of an electric vehicle will decline.

[0039] The charging device 200 includes a charging device 210 , a modulation device 220 , a plurality of switches 230 , and a protection resistor 240 .

[0040] Among them, the charging device 210 is a device for outputting electric energy. Optionally, the charging device can be a charging pile or a portable mobile power supply. For example, the charging device can be a DC charging pile, which can directly output high-voltage, high-current DC power, and can replenish a large amount of electric energy for the electric vehicle in a short time. After the DC charging pile communicates with the battery management system (Battery Management System, referred to as BMS) of the electric vehicle, the safety and efficiency of the charging process can be ensured.

[0041] The modulation device 220 is a device for modulating the electrical parameters output by the charging device. The power supply input end of the modulation device is connected to the power supply output end of the charging device.

[0042] The modulation device 220 includes a first inductor 221, a second inductor 222, a first capacitor 223, a second capacitor 224 and a plurality of switch elements, wherein the plurality of switch elements form a first switch circuit and a second switch circuit connected in parallel, wherein the first switch circuit includes a first switch element 225 and a second switch element 226 connected in series, and the second switch circuit includes a third switch element 227 and a fourth switch element 228 connected in series. One end of the first capacitor is connected to the power supply output end of the charging device, and the other end is connected to the line between the first switch element and the second switch element, and one end of the second capacitor is connected to the power supply output end of the charging device, and the other end is connected to the line between the third switch element and the fourth switch element. Each switch element exemplarily includes a transistor and a diode connected in parallel, wherein the transistor can be replaced by other switch tubes, for example, a metal-oxide-semiconductor field-effect transistor (Metal-Oxide-Semiconductor Field-Effect Transistor, referred to as MOSFET), an insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, referred to as IGBT), etc.

[0043] Optionally, the modulation device may be a boost DC-DC converter (BDC for short). The BDC can boost the input DC voltage to a higher DC voltage output, and can also modulate the electrical parameters output by the charging device to output AC power.

[0044] The multiple switches 230 include a first switch 231, a second switch 232, a third switch 233 and a fourth switch 244. One end of the first switch 231 is connected to the power supply output end of the device to be charged, and the other end is connected to the positive electrode of the charging device; one end of the second switch 232 is connected to the negative electrode of the device to be charged, and the other end is connected to the power supply input end of the charging device; one end of the third switch 233 is connected to the negative electrode of the device to be charged, and the other end is connected to the power supply input end of the charging device; one end of the fourth switch 234 is connected to the positive electrode of the device to be charged, and the other end is connected to the power supply output end of the modulation device.

[0045] The protection resistor 240 is connected in series with the third switch 233. When the third switch is closed, current flows through the protection resistor to protect the safety of the entire circuit.

[0046] The electronic device 300 is a device with data processing capability. Optionally, the electronic device may be a processor of a terminal and / or a server.

[0047] Among them, the terminal may include but is not limited to: smart phones (such as Android phones, IOS phones, etc.), tablet computers, laptops, desktop computers, portable personal computers, mobile Internet devices (Mobile Internet Devices, referred to as MID), intelligent voice interaction devices, smart home appliances, car terminals, etc., and the embodiments of the present application do not limit this.

[0048] Among them, the server may include but is not limited to: an independent physical server, a server cluster or distributed system composed of multiple physical servers, a cloud server that provides cloud services, cloud computing, cloud functions, cloud storage, network services, cloud communications, security services, and basic cloud computing services such as big data and artificial intelligence platforms, etc. The embodiments of the present application do not limit this.

[0049] See also Figure 2 A battery self-heating method provided in an embodiment of the present application is implemented by steps 011 and 012, which are described in detail below.

[0050] Step 011: controlling the modulation device to modulate the output voltage of the charging device to generate alternating current;

[0051] Step 012: Outputting AC power through the power supply output terminal of the modulation device.

[0052] Among them, alternating current is the voltage and current used to heat the device to be charged. Optionally, the waveform of the alternating current can be at least one of a sine wave and a high-order harmonic. The waveform of the sinusoidal alternating current shows periodic fluctuations and a stable frequency, which is conducive to the stable operation of electrical equipment. The values ​​of the voltage and current of the sinusoidal alternating current change continuously without mutations, and can efficiently heat the device to be charged. The sinusoidal alternating current output by the modulation device may cause noise, vibration and acoustic roughness problems (NVH problems for short). The frequency of the sinusoidal alternating current is concentrated at one point, which is more irritating to the human ear and can cause discomfort to people in the environment. High-order harmonic alternating current can avoid NVH problems, but it is difficult to generate. Random frequency changes within a certain range of the frequency of the sinusoidal alternating current can also avoid NVH problems.

[0053] Specifically, the power supply output end of the charging device is connected to the power supply input end of the modulation device. The modulation device modulates the output voltage of the charging device to generate alternating current. The alternating current is output to the device to be charged through the power supply output end of the modulation device, so that the device to be charged can be self-heated. After the temperature rises, the charging and discharging efficiency of the device to be charged can be improved, and the charging time of the charging device for the device to be charged can be reduced.

[0054] The battery self-heating method provided in the embodiment of the present application modulates the output voltage of the charging device through a modulation device, converts the output voltage of the charging device into alternating current, and then outputs the alternating current to the battery. In a low temperature environment, the battery can withstand a larger amount of alternating current than direct current, and the thermal effect generated by alternating current acting on the internal resistance of the battery is greater than the thermal efficiency generated by direct current acting on the internal resistance of the battery. The alternating current makes the battery self-heating rate higher, so that the battery can heat up quickly, improve the battery's charging and discharging performance, and reduce the overall charging time of the battery.

[0055] See also Figure 3 In some embodiments, the battery self-heating method further includes step 013 and step 014, which are described in detail below.

[0056] Step 013: Setting the output voltage of the charging device to be lower than the preset charging voltage of the device to be charged;

[0057] The preset charging voltage is the charging voltage required by the device to be charged.

[0058] Specifically, the output voltage of the charging device is set according to the preset charging voltage of the device to be charged. The modulation device can boost the output voltage of the charging device, and the output voltage of the charging device can be determined based on the boost efficiency of the modulation device to reduce power consumption. The output voltage of the charging device is lower than the preset charging voltage of the device to be charged, but cannot be too close to the preset charging voltage of the device to be charged, nor can it be too lower than the preset charging voltage of the device to be charged. For example, if the preset charging voltage of the device to be charged is 500V, the output voltage of the charging device can be set to 300V.

[0059] In this way, setting an appropriate output voltage of the charging device can ensure the voltage boosting efficiency of the modulation device, and provide appropriate operating space for subsequent modulation of the output voltage of the charging device.

[0060] Step 014: Boost the voltage of the charging device through the modulation device.

[0061] Specifically, if the output voltage of the charging device does not reach the preset charging voltage of the device to be charged, the output voltage of the charging device is boosted by the modulation device, and the subsequent modulation device can modulate the boosted voltage so that AC power can be output to the device to be charged after modulation.

[0062] See also Figure 4 In some embodiments, optionally, step 011 includes:

[0063] Step 0111: Control the on and off of multiple switch elements to generate alternating current.

[0064] Among them, the switch is an electronic component used to receive instructions and turn on or off the circuit. The switch can be a transistor and a diode connected in parallel. The parallel connection of the transistor and the diode can combine the amplification and switching functions of the transistor and the unidirectional conductivity and voltage stabilization characteristics of the diode, making the circuit work more stable and reliable, realizing more complex and efficient circuit functions, and optimizing the overall performance of the circuit.

[0065] Specifically, by controlling the on and off of a plurality of switch elements of the modulation device, a stable alternating current can be generated, so that the self-heating of the device to be charged can be more stable.

[0066] See also Figure 5 In some embodiments, optionally, step 0111 includes:

[0067] Step 01111: Control the duty cycle of each switch element in the plurality of switch elements to generate alternating current.

[0068] The duty cycle refers to the ratio of the time the switch is turned on in a pulse cycle to the pulse cycle.

[0069] Specifically, by controlling the on-time of each switch in the modulation device in each pulse cycle, the change of the alternating current output by the modulation device can be adjusted, thereby enabling the device to be charged to self-heat more efficiently after obtaining the alternating current.

[0070] See also Figure 6 In some embodiments, optionally, step 01111 includes:

[0071] Step 01112: When the set frequency of self-heating is greater than the preset frequency, based on the duty cycle superposition function corresponding to the alternating current, the duty cycle of each switch element is open-loop controlled to generate alternating current.

[0072] The setting frequency refers to determining the frequency value of the alternating current based on the self-heating requirement of the device to be charged.

[0073] The preset frequency refers to the maximum frequency that the modulation device can track and control.

[0074] When the set frequency of the self-heating of the device to be charged is greater than the preset frequency, the modulation device cannot track and control the frequency value of the AC power generated by itself, and cannot perform closed-loop control, and can only generate according to the set frequency. In this case, each switch in the modulation device is controlled to perform open-loop control, and the duty cycle of each switch is superimposed according to formula (1) to generate AC power.

[0075] The duty cycle superposition function corresponding to the alternating current is implemented as follows:

[0076] duty=duty0+Dp*sin(2πft)(1)

[0077] Among them, duty is the duty cycle corresponding to the alternating current, duty0 is the initial duty cycle, the initial duty cycle is determined based on the preset charging voltage of the device to be charged, Dp is the amplitude of the preset superimposed sine wave duty cycle, f is the required frequency value of the alternating current, and t is time.

[0078] The preset duty cycle superposition value is determined based on the first duty cycle superposition value and the second duty cycle superposition value. The first duty cycle superposition value is a value determined based on the output voltage of the modulation device and the AC power required for charging; the second duty cycle superposition value is a value determined based on the working condition of the modulation device.

[0079] Optionally, when the first duty cycle superposition value is not greater than the second duty cycle superposition value, the preset duty cycle superposition value may be the first duty cycle superposition value, so that the alternating current output by the modulation device can accurately meet the self-heating requirement of the device to be charged under the premise of ensuring safety; when the first duty cycle superposition value is greater than the second duty cycle superposition value, the preset duty cycle superposition value may be the second duty cycle superposition value, and although the alternating current output by the modulation device will reduce the self-heating efficiency of the device to be charged, the safety of the entire process is guaranteed.

[0080] See also Figure 6 In some embodiments, optionally, step 01111 includes:

[0081] Step 01113: When the set frequency of self-heating is less than the preset frequency, the duty cycle of each switch element is closed-loop controlled based on the electrical parameter superposition function corresponding to the alternating current and the actual output electrical parameters of the modulation device to generate alternating current, and the electrical parameters include voltage or current.

[0082] When the set frequency of the self-heating of the device to be charged is less than the preset frequency, the modulation device can accurately track and control the frequency value of the AC power generated by itself, and can perform closed-loop control. In this case, the actual output electrical parameters of the modulation device are continuously obtained, and the duty cycle of each switch in the modulation device is correspondingly controlled according to the following formula (2), so that the voltage amplitude of the AC power output by the modulation device reaches the preset voltage amplitude superposition value, so that the electrical parameters of the AC power actually output by the modulation device are more accurate.

[0083] The duty cycle superposition function corresponding to the alternating current is implemented as follows:

[0084] V=V0+Up*sin(2πft)(2)

[0085] Among them, V is the actual output voltage of the modulation device, V0 is the size of the initial voltage, the initial voltage size is determined based on the preset charging voltage of the device to be charged, and Up is the superposition value of the preset voltage amplitude.

[0086] The preset voltage amplitude superposition value is determined based on the first voltage amplitude superposition value and the second voltage amplitude superposition value. The first voltage amplitude superposition value is a value determined based on the output voltage of the modulation device and the AC power required for charging; the second voltage amplitude superposition value is a value determined based on the working condition of the modulation device.

[0087] Optionally, when the first voltage amplitude superposition value is not greater than the second voltage amplitude superposition value, the preset voltage amplitude superposition value may be the first voltage amplitude superposition value, so that the alternating current output by the modulation device can accurately meet the self-heating requirements of the device to be charged under the premise of ensuring safety; when the first voltage amplitude superposition value is greater than the second voltage amplitude superposition value, the preset voltage amplitude superposition value may be the second voltage amplitude superposition value. Although the alternating current output by the modulation device will reduce the self-heating efficiency of the device to be charged, the safety of the entire process is guaranteed.

[0088] See also Figure 7 In some embodiments, optionally, step 0111 includes:

[0089] Step 0112: Based on the period and amplitude of the sinusoidal alternating current, control the duty cycle of each switch element in the plurality of switch elements to generate sinusoidal alternating current.

[0090] Specifically, according to the frequency and amplitude of the sinusoidal alternating current required by the device to be charged, the period of the required sinusoidal alternating current can be determined. In each period, each switch element in the modulation device is controlled to operate at the corresponding duty cycle obtained as described above, thereby generating the sinusoidal alternating current required by the device to be charged.

[0091] See also Figure 8 In some embodiments, optionally, step 0112 includes:

[0092] Step 01121: Based on the amplitude, determine that the current direction is a first direction or a second direction, and the first direction is opposite to the second direction;

[0093] Step 01122: when the current direction is the first direction, control the duty cycle of a first target switch device among the multiple switch devices based on the amplitude, and control the duty cycles of the switch devices other than the first target switch device to be 0, and the duty cycle of the first target switch device is proportional to the absolute value of the amplitude;

[0094] Step 01123: When the current direction is the second direction, the duty cycle of the second target switch device among the multiple switch devices is controlled based on the amplitude, and the duty cycle of the switch devices other than the second target switch device is controlled to be 0, the duty cycle of the second target switch device is proportional to the absolute value of the amplitude, and the second target switch device is different from the first target switch device.

[0095] Among them, multiple switch elements form a first switch circuit and a second switch circuit in parallel, the first switch circuit includes a first switch element and a third switch element connected in series, the second switch circuit includes a second switch element and a fourth switch element connected in series, the first target switch element includes the first switch element and the third switch element, and the third target switch element includes the second switch element and the fourth switch element.

[0096] Specifically, the current direction can be determined according to the voltage amplitude output by the modulation device. The first direction is opposite to the second direction. The first direction refers to the current being input from the power supply output terminal of the charging device into the modulation device, and flowing into the positive electrode of the device to be charged through the first switch element and the third switch element; the second direction refers to the current being input from the power supply output terminal of the charging device into the modulation device, and flowing into the negative electrode of the device to be charged through the second switch element and the fourth switch element.

[0097] When the current direction is the first direction, according to the calculated duty cycle, the larger the voltage amplitude output by the modulation device, the larger the duty cycle, and the first switch element and the third switch element in the modulation device are controlled to operate according to the corresponding duty cycle, and the second switch element and the fourth switch element are controlled to be in the disconnected state.

[0098] When the current direction is the second direction, according to the calculated duty cycle, the larger the voltage amplitude output by the modulation device, the larger the duty cycle, and the second switch element and the fourth switch element in the modulation device are controlled to operate according to the corresponding duty cycle, and the first switch element and the third switch element are controlled to be in the disconnected state.

[0099] In this way, the sinusoidal alternating current required by the device to be charged can be accurately generated.

[0100] See also Fig. 9 In some embodiments, the battery self-heating method further includes step 015, step 016 and step 017, which are described in detail below.

[0101] Step 015: Determine whether the device to be charged has a self-heating requirement;

[0102] Specifically, in a low-temperature environment, the performance of the device to be charged decreases, and the temperature value of the battery cell with the lowest temperature inside the device to be charged is obtained. If the temperature value is lower than a preset value, it is confirmed that the device to be charged has a self-heating requirement; if the temperature value is not lower than the preset temperature value, it is confirmed that the device to be charged has no self-heating requirement. In addition, the self-heating requirement can be determined based on the user's usage requirements for the device to be charged. If the user requires the device to be charged to continue heating, it is determined that the device to be charged has a heating requirement.

[0103] For example, clarifying the self-heating requirements can control the entire charging process accordingly and improve charging efficiency.

[0104] Step 016: If the device to be charged has a self-heating requirement, the charging device is controlled to be in a self-heating mode, the power supply output end of the charging device is connected to the power supply input end of the modulation device, the power supply output end of the modulation device is connected to the positive electrode of the device to be charged, and the power supply output end of the charging device is not connected to the positive electrode of the device to be charged;

[0105] Specifically, when the device to be charged has a self-heating requirement, the charging device is controlled to be in a self-heating mode, the first switch is disconnected, so that the power supply output end of the charging device is not connected to the positive pole of the device to be charged; the second switch is closed, so that the negative pole of the charging device is connected to the negative pole of the device to be charged; the fourth switch is closed, so that the power supply output end of the modulation device is connected to the power supply input end of the device to be charged.

[0106] Step 017: If the device to be charged has no self-heating requirement and the output voltage of the charging device is not lower than the preset charging voltage of the device to be charged, the charging device is controlled to be in charging mode, and the power supply output end of the charging device is connected to the positive electrode of the device to be charged.

[0107] Specifically, when the device to be charged has no self-heating requirement and the output voltage of the charging device is not lower than the preset charging voltage of the device to be charged, the charging device is controlled to be in the charging mode, the first switch is closed, so that the power supply output end of the charging device is connected to the positive pole of the device to be charged; the second switch is closed, so that the negative pole of the charging device is connected to the negative pole of the device to be charged; in this way, the charging device directly charges the device to be charged.

[0108] When the device to be charged has no self-heating requirement and the output voltage of the charging device is lower than the preset charging voltage of the device to be charged, the first switch is opened, and the second switch and the fourth switch are closed, so that the output voltage of the charging device is boosted by the modulation device, and the output voltage of the modulation device is not lower than the preset charging voltage of the device to be charged, so that the device to be charged can be charged.

[0109] In this way, according to the self-heating requirements of the device to be charged and other conditions, the different relationships among the device to be charged, the charging device and the modulation device are controlled accordingly, so as to improve the charging efficiency of the device to be charged and reduce the charging time.

[0110] According to the method described in the above embodiment, the present application embodiment also provides a battery self-heating device 400, which is used to perform the steps in the above battery self-heating method. Fig.10 , Fig.10 : is a schematic diagram of a module of a battery self-heating device 400 provided in an embodiment of the present application. The battery self-heating method device 400 comprises:

[0111] The modulation module 401 is used to control the modulation device to modulate the output voltage of the charging device to generate alternating current;

[0112] The output module 402 is used to output AC power through the power supply output terminal of the modulation device.

[0113] It should be noted that the specific details of each module unit in the above-mentioned battery self-heating method device have been described in detail in the embodiment of the above-mentioned battery self-heating method, and will not be repeated here.

[0114] In the embodiments of the present application, the term "module" or "unit" refers to a computer program or a part of a computer program with a predetermined function, and works together with other related parts to achieve a predetermined goal, and can be implemented in whole or in part by using software, hardware (such as processing circuits or memories) or a combination thereof. Similarly, a processor (or multiple processors or memories) can be used to implement one or more modules or units. In addition, each module or unit can be part of an overall module or unit that includes the function of the module or unit.

[0115] In some embodiments, the battery self-heating method device in the embodiments of the present application can be implemented in hardware, such as an electronic device, or a component in an electronic device, such as an integrated circuit or a chip; the management device can also be implemented in software, such as as an application installed in an electronic device.

[0116] In some embodiments, see Fig.11 , Fig.11 : is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. The electronic device 500 includes a processor 501 and a memory 502. The memory 502 stores a computer program 503 that can be run on the processor 501. When the program 503 is executed by the processor 501, each process of the embodiment of the above-mentioned battery self-heating method is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0117] An embodiment of the present application also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the various processes of the embodiment of the above-mentioned battery self-heating method are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0118] The processor may be a processor in the electronic device in the above embodiment. The computer readable storage medium may be a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk.

[0119] Computer readable media may include computer storage media and communication media. Computer storage media include volatile and non-volatile, removable and non-removable media implemented by any method or technology for storing information such as computer readable instructions, data structures, program modules or other data. Computer storage media include RAM, ROM, Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), flash memory or other solid-state memory technology, CD-ROM, Digital Versatile Disc (DVD) or other optical storage, cassettes, magnetic tapes, disk storage or other magnetic storage devices. Of course, those skilled in the art will know that computer storage media are not limited to the above.

[0120] The embodiment of the present application further provides a computer program product, including a computer program, which implements the above-mentioned battery self-heating method when executed by a processor. The processor may be a processor in the electronic device in the above-mentioned embodiment. When the computer program is executed by the processor, each process of the embodiment of the above-mentioned battery self-heating method is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0121] It is understandable that in the specific implementation of this application, data related to user identity or characteristics is involved. When the above embodiments of this application are applied to specific products or technologies, user permission or consent is required, and the collection, use and processing of relevant data need to comply with relevant laws, regulations and standards of relevant countries and regions.

[0122] In the description of this specification, the descriptions with reference to the terms "certain embodiments", "in an example", "exemplarily", etc., mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0123] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0124] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery self-heating method, characterized in that: Applied to a charging device, the charging device includes a charging device and a modulation device, the power supply output end of the charging device is connected to the power supply input end of the modulation device, and the method includes: controlling the modulation device to modulate the output voltage of the charging device to generate alternating current; The alternating current is outputted through the power supply output terminal of the modulation device.

2. The battery self-heating method according to claim 1, characterized in that: Also includes: Setting the output voltage of the charging device to be lower than the preset charging voltage of the device to be charged; The output voltage of the charging device is boosted by the modulation device.

3. The battery self-heating method according to claim 1, characterized in that: The modulation device includes a plurality of switch elements, and the control of the modulation device to modulate the output voltage of the charging device to generate alternating current includes: The plurality of switch elements are controlled to be on and off to generate the alternating current.

4. The battery self-heating method according to claim 3, characterized in that: The on-off control of the plurality of switch elements to generate the alternating current comprises: The duty cycle of each of the plurality of switch elements is controlled to generate the alternating current.

5. The battery self-heating method according to claim 4, characterized in that: The step of controlling the duty cycle of each of the plurality of switch elements to generate the alternating current comprises: When the set frequency of self-heating is greater than the preset frequency, the duty cycle of each of the switch elements is open-loop controlled based on a duty cycle superposition function corresponding to the alternating current to generate the alternating current.

6. The battery self-heating method according to claim 5, characterized in that: The open-loop control of the duty cycle of each switch element based on the duty cycle superposition function corresponding to the alternating current is implemented based on the following formula: duty=duty0+Dp*sin(2πft) Among them, duty is the duty cycle corresponding to the alternating current, duty0 is the initial duty cycle, and the initial duty cycle is determined based on the preset charging voltage of the device to be charged, Dp is the amplitude of the preset superimposed alternating current duty cycle, f is the required frequency value of the alternating current, and t is time.

7. The battery self-heating method according to claim 6, characterized in that: The preset duty cycle superposition value is determined based on a first duty cycle superposition value and a second duty cycle superposition value, wherein the first duty cycle superposition value is determined based on the output voltage of the modulation device and the alternating current, and the second duty cycle superposition value is determined based on the operating condition of the modulation device.

8. The battery self-heating method according to claim 4, characterized in that: The step of controlling the duty cycle of each of the plurality of switch elements to generate the alternating current comprises: When the set frequency of self-heating is less than the preset frequency, the duty cycle of each switching element is closed-loop controlled based on the superposition function of electrical parameters corresponding to the alternating current and the actual output electrical parameters of the modulation device to generate the alternating current, and the electrical parameters include voltage or current.

9. The battery self-heating method according to claim 8, characterized in that: The closed-loop control of the duty cycle of each switch element based on the electrical parameter superposition function corresponding to the alternating current and the actual output electrical parameter of the modulation device is implemented based on the following formula: V=V0+Up*sin(2πft) Among them, V is the actual output voltage of the modulation device, V0 is the initial voltage amplitude (it is recommended to be changed to the initial voltage size), the initial voltage amplitude (initial voltage size) is determined based on the preset charging voltage of the device to be charged, Up is the amplitude of the superimposed sine wave of the preset voltage, f is the frequency value of the required alternating current, and t is time.

10. The battery self-heating method according to claim 9, characterized in that: The preset voltage amplitude superposition value is determined based on a first voltage amplitude superposition value and a second voltage amplitude superposition value, wherein the first voltage amplitude superposition value is determined based on the output voltage of the modulation device and the alternating current, and the second voltage amplitude superposition value is determined based on the operating condition of the modulation device.

11. The battery self-heating method according to any one of claims 4 to 10, characterized in that: The alternating current includes sinusoidal alternating current, and the step of controlling the duty cycle of each of the plurality of switch elements to produce the alternating current includes: Based on the period and amplitude of the sinusoidal alternating current, the duty cycle of each of the plurality of switch elements is controlled to generate the sinusoidal alternating current.

12. The battery self-heating method according to claim 11, characterized in that: The step of controlling the duty cycle of each of the plurality of switch elements based on the period and amplitude of the sinusoidal alternating current to generate the sinusoidal alternating current comprises: Based on the amplitude, determining that the direction of the current is a first direction or a second direction, the first direction and the second direction are opposite; When the current direction is the first direction, the duty cycle of a first target switch element among the plurality of switch elements is controlled based on the amplitude, and the duty cycles of the switch elements other than the first target switch element are controlled to be 0, and the duty cycle of the first target switch element is proportional to the absolute value of the amplitude; When the current direction is the second direction, the duty cycle of a second target switch element among the multiple switch elements is controlled based on the amplitude, and the duty cycle of the switch elements other than the second target switch element is controlled to be 0, the duty cycle of the second target switch element is proportional to the absolute value of the amplitude, and the second target switch element is different from the first target switch element.

13. The battery self-heating method according to claim 2, characterized in that: Also includes: Determining whether the device to be charged has a self-heating requirement; If the device to be charged has a self-heating requirement, the charging device is controlled to be in a self-heating mode, in which the power supply output end of the charging device is connected to the power supply input end of the modulation device, the power supply output end of the modulation device is connected to the positive electrode of the device to be charged, and the power supply output end of the charging device is not connected to the positive electrode of the device to be charged; If the device to be charged has no self-heating requirement and the output voltage of the charging device is not lower than the preset charging voltage of the device to be charged, the charging device is controlled to be in a charging mode, in which the power supply output end of the charging device is connected to the positive pole of the device to be charged.

14. The battery self-heating method according to claim 1, characterized in that: The waveform of the alternating current includes at least one of a sine wave and a high-order harmonic wave.

15. An electronic device, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the battery self-heating method according to any one of claims 1 to 14 is implemented.

16. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the battery self-heating method as described in any one of claims 1 to 14 is implemented.

17. A computer program product, characterized in that The invention comprises a computer program, which, when executed by a processor, implements the battery self-heating method according to any one of claims 1 to 14.

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