Pulse heating method, device, system and vehicle for power battery

Abstract

The embodiment of the present application provides a kind of power battery's pulse heating method, device, system and vehicle, the power battery's pulse heating method includes: obtaining target audio parameter;According to target audio parameter, generate target current signal;At least according to target current signal, calculate the pulse width modulation signal for adjusting current;Pulse current is adjusted using pulse width modulation signal, and the pulse current after adjustment is output;And using the pulse current after adjustment, power battery is heated.By simple control process, pulse width modulation signal based on target audio parameter is used to adjust the pulse current for heating power battery, resonance sound caused by pulse current can be quickly and effectively converted into pleasing music or melody, and the use of vehicle experience and comfort of user is improved.

Description

Technical Field

[0001] This invention relates to the fields of vehicles and power batteries, and particularly to a pulse heating method, apparatus, system, and vehicle for power batteries. Background Technology

[0002] With the development of science and technology and the need for environmental protection, new energy vehicles are developing well and are increasingly occupying an important position in the automobile market.

[0003] The power battery is a crucial component of new energy vehicles, and its performance significantly impacts the overall vehicle performance. In cold regions or low-temperature environments, the performance of new energy vehicle power batteries deteriorates significantly, leading to limited vehicle power and reduced driving range. To improve the performance and adaptability of new energy vehicles in low-temperature environments, pulse heating technology has emerged as an effective battery heating technology. During pulse heating, the heating system generates a large pulse current, which can cause the pulse heating system to resonate and produce noise, affecting vehicle users.

[0004] In recent years, some technologies have emerged that aim to reduce or improve the noise generated by resonance in pulse heating systems.

[0005] For example, the target melody of the music is determined based on the pulse heating current request value; the switching frequency of the Insulated Gate Bipolar Transistor (IGBT) is determined according to the target melody; the period corresponding to each switching frequency is determined according to the duration of the music beat; within each period, the corresponding switching frequency and preset duty cycle are input to the IGBT, causing the IGBT to output current; by controlling the IGBT to adjust the duty cycle, the current value of the IGBT is gradually brought closer to the pulse heating current request value, thereby changing the frequency of the resonant tone of the heating system, so that the resonant tone is transformed into a specific tone and melody;

[0006] For example, in battery heating mode, audio output information is acquired; audio parameters are determined based on the audio output information, which are frequency domain signals that include at least pitch and volume; heating commands are determined based on the audio parameters, and the frequency of the pulse current is adjusted by the heating commands, thereby changing the frequency of the resonant tone of the heating system, so that the resonant tone is transformed into a specific tone and melody.

[0007] It should be noted that the above description of the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of the present invention and facilitating understanding by those skilled in the art. It should not be assumed that the above technical solutions are known to those skilled in the art simply because they have been described in the background section of this invention. Summary of the Invention

[0008] The inventors discovered that in the aforementioned prior art, it is necessary to determine the switching frequency according to the target melody and the period of each switching frequency according to the beat duration. Furthermore, within each period, the pulse current frequency is adjusted by adjusting the switching frequency and the current amplitude is adjusted by adjusting the duty cycle. This results in a complex control process and slow response speed, requiring a considerable amount of time to demonstrate the efficiency of converting the resonant tone into a specific pitch and melody, leading to a poor user experience. In addition, the aforementioned prior art requires adjusting the frequency of the pulse current, which affects the magnitude of the output pulse current, thereby affecting the heating effect on the power battery. Moreover, the resonant tone caused by the pulse current in the aforementioned prior art is a triangular wave rather than a sine wave, resulting in an unpleasant timbre.

[0009] To address one or more problems or similar issues in the prior art, embodiments of the present invention provide a pulse heating method, apparatus, system, and vehicle for a power battery. Through a simple control process, by using a PWM signal generated based on target audio parameters to adjust the pulse current used for heating the power battery, the resonance sound caused by the pulse current can be quickly and effectively transformed into pleasant music or melody, enhancing the user's driving experience and comfort.

[0010] According to a first aspect of the present invention, a pulse heating method for a power battery is provided, the pulse heating method comprising: acquiring target audio parameters; generating a target current signal based at least on the target audio parameters; calculating a pulse width modulation (PWM) signal for adjusting the current based at least on the target current signal; adjusting the pulse current using the pulse width modulation (PWM) signal and outputting the adjusted pulse current; and heating the power battery using the adjusted pulse current.

[0011] Optionally, acquiring the target audio parameters includes: acquiring a predetermined or user-selected melody or music; generating a corresponding time-domain audio signal based on the melody or music, as the target audio parameter or a part of the target audio parameter. In this way, the music or melody used as the target for resonance tone conversion can be predetermined or user-selected, improving user convenience and flexibility. Furthermore, by using the time-domain audio signal generated based on the melody or music as the target audio parameter or a part of it, a time-domain controlled PWM signal is generated, thus enabling direct reproduction of the music or melody based on time-domain control, resulting in a fast response speed.

[0012] Optionally, the method further includes: updating the melody or music based on the user's operation instructions; generating a corresponding time-domain audio signal based on the updated melody or music, and updating the target audio parameters or a portion of the target audio parameters. In this way, the user can edit the melody or music according to their preferences, thereby converting the resonance sound caused by the pulse current into music or melody that the user likes, further enhancing the user's driving experience and comfort.

[0013] Optionally, the target current is a sinusoidal signal or a near-sinusoidal signal. In this way, the pulse width modulation (PWM) signal generated based on the target current signal can also be formed as a smooth sine wave or a near-sinusoidal wave, thereby better producing pleasing music or melodies.

[0014] Optionally, generating a target current signal based on the target audio parameters includes: generating the target current signal based on the target audio parameters, a sound resonance transfer function, and an audio gain function, wherein the sound resonance transfer function is determined based on the relationship and structure between the pulse current generating device outputting the pulse current and the vehicle, and the audio gain function is adjusted according to user preferences and set based on the gain of each frequency band. In this way, generating the target current signal by combining the target audio parameters, the sound resonance transfer function based on the vehicle structure, and the audio gain function based on user preferences makes the target current signal more consistent with the actual conditions of the vehicle and the user's preferences, thereby enabling the PWM signal generated based on the target current signal to be more accurate and the adjustment of the pulse current more effective.

[0015] Optionally, the target audio parameters include a time-domain audio signal, and the target current signal is equal to the product of the time-domain audio signal, the sound resonance transfer function, and the audio gain function. This allows for the rapid and accurate determination of the target current signal.

[0016] Optionally, the modulation frequency of the pulse width modulation (PWM) signal is greater than a preset threshold, which is the upper limit of the sound frequency that the human ear can perceive. In this way, by using a high-frequency PWM signal higher than the human ear's hearing frequency to adjust the pulse current, the current ripple generated by the high-frequency modulation is smaller, which can reduce the noise generated by the pulse current within the sound frequency range that the human ear can perceive, making the resonant tone closer to the frequency curve of music or melody.

[0017] Optionally, the pulse width modulation (PWM) signal is a pulse width modulation (PWM) signal at a specific moment or a sequence of pulse width modulation (PWM) signals. This allows for the adjustment of the pulse current using a PWM signal with a very short duration, achieving a rapid response and thus quickly converting resonant tones into music or melody.

[0018] Optionally, the pulse current is adjusted using the pulse width modulation (PWM) signal to output the adjusted pulse current. This includes: inputting the PWM signal into a switching element; and adjusting the amplitude of the pulse current output by the switching element using the PWM signal to obtain the adjusted pulse current. In this way, the amplitude of the pulse current is adjusted only in the time domain based on the PWM signal, without needing to control or change the switching frequency of the switching element. This achieves a fast response without affecting the pulse current, thus ensuring both noise conversion and effective heating of the power battery.

[0019] Optionally, at least based on the target current signal, a pulse width modulation (PWM) signal for regulating the current is calculated, including: calculating the PWM signal based on the frequency characteristics of the target current signal and other in-vehicle noise. This allows the PWM signal to be generated in conjunction with other in-vehicle noise, enabling the music or melody generated from the resonance sound to also cover other in-vehicle noise, further enhancing the user's driving experience and comfort.

[0020] According to a second aspect of the present invention, a pulse current generating apparatus is provided, the pulse current generating apparatus comprising: a calculation unit that calculates a pulse width modulation (PWM) signal based at least on a target current signal; and an output unit that adjusts the pulse current using the pulse width modulation (PWM) signal and outputs the adjusted pulse current, wherein the target current signal is generated based on target audio parameters.

[0021] According to a third aspect of the present invention, a pulse heating system for a power battery is provided, the pulse heating system comprising: an acquisition unit for acquiring target audio parameters; a vehicle control unit for generating a target current signal based on the target audio parameters; a pulse current generating device according to a second aspect of the present invention, which at least inputs the target current signal and outputs a pulse current adjusted using a pulse width modulation (PWM) signal; and a heating unit for heating the power battery using the adjusted pulse current.

[0022] According to a fourth aspect of the present invention, a vehicle is provided, the vehicle including the pulse current generating device described in the second aspect of the present invention, or the vehicle including the pulse heating system of the power battery described in the third aspect of the present invention.

[0023] One of the beneficial effects of the embodiments of the present invention is that:

[0024] A target current signal is generated based on the target audio parameters, and a PWM signal is generated based on the target current signal. The pulse current is directly adjusted in the time domain using the PWM signal, and the adjusted pulse current is used to heat the power battery. Therefore, through a simple control process, the resonance sound caused by the pulse current can be quickly and effectively converted into music or melody, improving the user's driving experience and comfort.

[0025] In addition, since the pulse current only needs to be adjusted using PWM in the time domain and not controlled or adjusted in the frequency domain, the pulse current will not be affected, and thus the heating effect on the power battery will not be affected.

[0026] In addition, the resonance sound caused by the pulsed current in this method can be transformed into music or melody with sine waves or similar waveforms, which has a good auditory effect, can make users feel happy, and improve the user experience.

[0027] Embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings. It should be understood that the embodiments of the present invention are not limited in scope thereto. Within the spirit and scope of the appended claims, embodiments of the present invention include many changes, modifications, and equivalents.

[0028] Features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0029] It should be emphasized that the term "including / contains / has" as used herein refers to the presence of a feature, whole or component, but does not exclude the presence or addition of one or more other features, wholes or components. Attached Figure Description

[0030] The above and other objects, features and advantages of embodiments of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0031] Figure 1 This is a block diagram of a pulse heating method for a power battery according to an embodiment of the present invention;

[0032] Figure 2 This is a block diagram of a method for obtaining target music parameters according to an embodiment of the present invention;

[0033] Figure 3 This is a block diagram of a method for regulating pulse current using a pulse width modulation (PWM) signal according to an embodiment of the present invention;

[0034] Figure 4 This is a waveform diagram of the pulse width modulation (PWM) signal applied to the IGBT according to an embodiment of the present invention;

[0035] Figure 5 This is a waveform diagram of generating a pulse width modulation (PWM) signal using a target current signal according to an embodiment of the present invention;

[0036] Figure 6 This is a flowchart of one embodiment of the pulse heating method for a power battery according to an embodiment of the present invention;

[0037] Figure 7 This is a block diagram of a pulse current generating device according to an embodiment of the present invention;

[0038] Figure 8 This is a block diagram of a pulse heating system for a power battery according to an embodiment of the present invention. Detailed Implementation

[0039] Referring to the accompanying drawings, the foregoing and other features of the invention will become apparent from the following description. Specific embodiments of the invention are specifically disclosed in the description and drawings, illustrating partial implementations in which the principles of the invention can be employed. It should be understood that the invention is not limited to the described embodiments, but includes all modifications and equivalents falling within the scope of the appended claims.

[0040] The pulse heating method, pulse heating device, pulse heating system of power battery, and vehicle of the present invention will be described in detail below with reference to the accompanying drawings.

[0041] First aspect of the embodiments

[0042] This invention provides a pulse heating method for a power battery.

[0043] The power battery involved in the embodiments of the present invention can be of various types, such as lithium battery, nickel-metal hydride battery, sodium-sulfur battery, or lead-acid battery.

[0044] The power battery in this embodiment of the invention is installed in the vehicle to provide power or part of the power to the vehicle.

[0045] The vehicle in this embodiment of the invention can be a vehicle for various purposes, such as a small passenger car, a truck, etc.

[0046] The vehicle in this embodiment of the invention can be any vehicle that uses a power battery, such as a new energy vehicle or a hybrid electric vehicle.

[0047] The pulse heating method for the power battery in this embodiment of the invention can be executed by one or more devices or equipment. For example, some steps can be implemented by cloud devices and some steps can be implemented by local devices; or all steps can be implemented by local devices.

[0048] For example, local devices include, but are not limited to, vehicle controllers, in-vehicle terminals, pulse current generating devices, and mobile terminals used by users, while cloud devices include, but are not limited to, cloud servers.

[0049] Figure 1 This is a block diagram of a pulse heating method for a power battery according to an embodiment of the present invention. Figure 1 As shown, the method includes:

[0050] Step 101: Obtain the target audio parameters;

[0051] Step 102: Generate the target current signal based at least on the target audio parameters;

[0052] Step 103: Calculate the pulse width modulation (PWM) signal for regulating the current, based at least on the target current signal;

[0053] Step 104: Adjust the pulse current using a pulse width modulation (PWM) signal, and output the adjusted pulse current; and

[0054] Step 105: Use the adjusted pulse current to heat the power battery.

[0055] In this way, a target current signal is generated based on the target audio parameters, and a PWM signal is generated based on the target current signal. The pulse current is directly adjusted in the time domain using the PWM signal, and the adjusted pulse current is used to heat the power battery. Therefore, through a simple control process, the resonance sound caused by the pulse current can be quickly and effectively converted into music or melody, improving the user's driving experience and comfort.

[0056] In addition, since the pulse current only needs to be adjusted using PWM in the time domain and not controlled or adjusted in the frequency domain, the pulse current will not be affected, and thus the heating effect on the power battery will not be affected.

[0057] In addition, the resonance sound caused by the pulsed current in this method can be converted into a sine wave or a similar waveform, which has a good auditory effect, can make users feel happy, and improve the user experience.

[0058] The steps of the method are described in detail below. This description is intended to provide a better understanding of the invention, not to limit it.

[0059] In step 101, the target music parameters are obtained.

[0060] In some embodiments, the target musical parameter refers to the musical parameter of the music or melody that is expected to be transformed into the resonance tone generated when the power battery is heated by a pulse current.

[0061] Figure 2 This is a block diagram of a method for obtaining target music parameters according to an embodiment of the present invention. For example... Figure 2 As shown, the method includes:

[0062] Step 201: Obtain a predetermined melody or music selected by the user;

[0063] Step 202: Generate the corresponding time-domain audio signal based on the melody or music, as the target audio parameter or part of the target audio parameter.

[0064] In this way, the music or melody that serves as the target for resonance tone conversion can be predetermined or selected by the user, improving the convenience and flexibility of the user experience. In addition, by using the time-domain audio signal generated based on the melody or music as the target audio parameter or part thereof, a PWM signal based on time-domain control is generated, thus enabling the direct reproduction of music or melody based on time-domain control with a fast response speed.

[0065] In step 201, the melody or music obtained can be predetermined or selected by the user.

[0066] For example, the vehicle's infotainment system may pre-store melodies or music for the conversion of resonance tones during battery heating. When the user turns on or automatically turns on the power battery pulse heating function, the relevant melodies or music can be directly retrieved from the memory.

[0067] For example, multiple melodies or music for battery heating resonance tone conversion are pre-stored in the vehicle system's memory. When the user turns on or automatically turns on the power battery pulse heating function, multiple melodies or music that the user can choose are displayed on the screen of the vehicle terminal or the user's mobile terminal. After the user makes a selection, the melody or music selected by the user is retrieved from the memory.

[0068] For example, multiple melodies or music for battery heating resonance sound conversion are pre-stored in the cloud server. When the user turns on or automatically turns on the power battery pulse heating function, multiple melodies or music that the user can choose are displayed on the screen of the vehicle terminal or the user's mobile terminal. After the user makes a selection, the command based on the user's selection is sent to the cloud server, and the melody or music selected by the user is called from the server.

[0069] For example, when a user turns on or automatically turns on the power battery pulse heating function, an interface is displayed on the screen of the vehicle terminal or the user's mobile terminal, allowing the user to set and search for melodies or music. The user can search for their favorite melodies or music in the cloud and set them as the melody or music for resonance tone conversion when the battery is heated.

[0070] In some embodiments, the acquired melody or music may be a complete piece of music or a portion of music, and the embodiments of the present invention do not limit the duration of the acquired melody or music. The melody or music can be repeatedly reproduced during the process of using pulse heating of the power battery.

[0071] In step 202, a corresponding time-domain audio signal is generated based on the melody or music, which is used as the target audio parameter or part of the target audio parameter.

[0072] In some embodiments, the target audio parameters include a time-domain audio signal;

[0073] For example, based on a predetermined or user-selected melody or music, a corresponding time-domain audio signal S is generated. out ;

[0074] In some embodiments, the time-domain audio signal is, for example, the pitch at a certain moment or a specific moment.

[0075] For example, the time-domain audio signal S out It is the instantaneous value obtained by differentiating the audio signal of music or melody. Specifically, it is the sampling of a continuous signal at fixed time intervals, that is, converting a continuous signal into a discrete-time signal.

[0076] In addition, in some embodiments, the audio deviation ΔS can also be obtained.

[0077] For example, the audio deviation ΔS is the difference between the target current signal and the actual output (instantaneous value of pulse current), that is, audio deviation = target current signal - actual output signal.

[0078] In some embodiments, the melody or music can be updated based on the user's operation instructions; a corresponding time-domain audio signal can be generated based on the updated melody or music, and the target audio parameters or a portion of the target audio parameters can be updated.

[0079] In this way, users can edit the melody or music according to their own preferences, thereby transforming the resonance sound caused by the pulse current into music or melody that they like, further enhancing the user's driving experience and comfort.

[0080] In some embodiments, editing a melody or music means adjusting the musical parameters of the melody or music. For example, musical parameters include at least one of the following: pitch, timbre, tone, volume, musical style, reverb, delay, gain, musical stage, crossover sound pressure level, amplifier channel, and rhythm.

[0081] For example, users can edit selected melodies or music using an equalizer (EQ), such as adjusting music parameters and generating corresponding time-domain audio signals based on the adjusted music;

[0082] For example, users can edit selected melodies or music using voice commands. For instance, if a user says, "I want it to be more upbeat," then based on that voice command, the musical parameters of the selected melody or music can be adjusted to make the music sound more cheerful. This could also involve adjusting the musical style or rhythm of the music, and generating a corresponding time-domain audio signal based on the adjusted music.

[0083] In some embodiments, after hearing the melody or music produced by the resonance tone transformation during the pulse current heating of the battery, the user can reselect the melody or music based on their perception, or edit the selected melody or music. Based on the reselected or edited melody or music, a target current signal and a PWM signal are regenerated, and the pulse current is adjusted based on the regenerated PWM signal, thereby making the melody or music produced by the resonance tone transformation during the pulse current heating of the battery increasingly closer to the user's preferences.

[0084] After obtaining the target music parameters, in step 102, at least based on the target audio parameters, a target current signal is generated.

[0085] In some embodiments, the target current signal is a sine wave signal or a near-sine wave signal. In this way, the pulse width modulation (PWM) signal generated based on the target current signal can also be formed as a smooth sine wave or a near-sine wave, thereby better producing pleasing music or melody.

[0086] In some embodiments, a target current signal is generated based on target audio parameters, a sound resonance transfer function, and an audio gain function. The sound resonance transfer function is determined based on the relationship and structure of the pulse current generating device and its connection to the vehicle. The audio gain function is adjusted according to user preferences and set based on the gain of each frequency band. For example, the relationship and structure of the pulse current generating device and its connection to the vehicle includes the location of the pulse current generating device within the vehicle, its connection relationship with the vehicle, and the connection structure.

[0087] In this way, by combining the target audio parameters, the sound resonance transfer function based on the vehicle structure, and the audio gain function based on user preferences to generate the target current signal, the target current signal is more in line with the actual condition of the vehicle and the user's preferences. This makes the PWM signal generated based on the target current signal more accurate and the regulation of the pulse current more effective.

[0088] For example, based on the relationship and structure of the pulse current generator and the vehicle, the resonant transfer function G1(s) is obtained; the gain function G2(s), adjusted according to user preferences and set based on the gain of each frequency band, is obtained; the vehicle control unit adopts negative feedback control based on the audio signal S at the current moment. out Given the audio deviation ΔS, the current signal I required to generate a melody that matches the user's listening experience is calculated using G1(s) and G2(s), i.e., the target current signal.

[0089] In some embodiments, the target current signal is equal to the product of the time-domain audio signal, the sound resonance transfer function, and the audio gain function, i.e., target current signal = S out *G1(s)*G2(s). In this way, the target current signal can be determined quickly and accurately.

[0090] In addition, for information on the resonant transfer function G1(s) and the gain function G2(s), please refer to relevant technologies; they will not be explained in detail here.

[0091] After generating the target current signal, in step 103, at least based on the target current signal, a PWM signal for regulating the current is calculated.

[0092] For example, the vehicle control unit sends the current signal I, i.e. the target current signal, to the pulse current generation device, which then calculates the PWM signal that needs to be modulated by the current signal I.

[0093] For example, the target current signal is input to a pulse current generating device, which calculates the required PWM signal using a P-algorithm, PI-algorithm, or PID-algorithm. In some embodiments, the modulation frequency of the pulse width modulation (PWM) signal is greater than a preset threshold, which is the upper limit of the sound frequency that the human ear can perceive. Thus, by using a high-frequency PWM signal higher than the human ear's hearing frequency to regulate the pulse current, the current ripple generated by the high-frequency modulation is smaller, which can reduce the noise generated by the pulse current within the sound frequency range that the human ear can perceive, making the resonant tone closer to the frequency curve of music or melody.

[0094] For example, the range of sound frequencies that the human ear can perceive is 20Hz to 20kHz. Therefore, the modulation frequency of the PWM signal can be set to above 20kHz, so that the current noise at this modulation frequency cannot be perceived by the human ear.

[0095] In some embodiments, the pulse width modulation (PWM) signal is a pulse width modulation (PWM) signal at a certain moment or a sequence of pulse width modulation (PWM) signals.

[0096] In this way, since the modulation frequency of the PWM signal is set to above 20kHz, it occupies only a very short time in the time domain. Therefore, the pulse current can be adjusted by a PWM signal that occupies a very short time, so as to achieve a fast response and quickly achieve the effect of converting the resonance tone into music or melody.

[0097] After generating a pulse width modulation (PWM) signal for regulating the current, in step 104, the pulse current is regulated using the pulse width modulation (PWM) signal, and the regulated pulse current is output.

[0098] In some embodiments, the pulse width modulation (PWM) signal can also be calculated in conjunction with other noises within the vehicle. For example, the pulse width modulation (PWM) signal can be calculated based on the frequency characteristics of the target current signal and other noises within the vehicle.

[0099] For example, other noises inside the vehicle can be collected by sensors, and the frequency characteristics of these other noises can be analyzed to combine with the target current signal to calculate a pulse width modulation (PWM) signal for regulating the current.

[0100] For example, other noises inside the vehicle include wind noise, tire noise, and transmission system noise.

[0101] In this way, it is also possible to combine other noises in the car to generate PWM signals, so that the music or melody converted from the resonance tone can also cover other noises in the car, further improving the user's driving experience.

[0102] Figure 3 This is a block diagram of a method for regulating pulse current using a pulse width modulation (PWM) signal according to an embodiment of the present invention. Figure 3 As shown, the method includes:

[0103] Step 301: Input the pulse width modulation (PWM) signal into the switching element;

[0104] Step 302: Adjust the amplitude of the pulse current output by the switching element using a pulse width modulation (PWM) signal to obtain the adjusted pulse current.

[0105] In this way, the amplitude of the pulse current is adjusted in the time domain based solely on the PWM signal, without the need to control and change the switching frequency of the switching elements. This achieves a fast response without affecting the pulse current, thus ensuring the heating effect on the power battery while achieving noise conversion.

[0106] In some embodiments, the switching element can be of various types, such as an insulated gate bipolar transistor (IGBT).

[0107] Figure 4 This is a waveform diagram of the pulse width modulation (PWM) signal applied to the IGBT according to an embodiment of the present invention. Figure 4 As shown, a high-frequency PWM signal is used to control the IGBT with different duty cycles D0, D1, D2, and D3; however, the switching frequency f0 of the IGBT is fixed.

[0108] Figure 5 This is a waveform diagram of a pulse width modulation (PWM) signal generated using a target current signal according to an embodiment of the present invention. Figure 5 As shown, by comparing the target current signal with the high-frequency carrier signal (triangular wave), the amplitude of the target current signal can be converted into the duty cycle value of the PWM signal. Specifically, the comparison is as follows: if the carrier signal is greater than the target current signal, a positive duty cycle signal (1) is output; if the carrier signal is less than the target current signal, a negative duty cycle signal (0) is output. That is, the continuous target current signal is discretized into a duty cycle signal, i.e., the PWM signal.

[0109] A PWM signal drives switching elements (such as IGBTs) and a pulse generator to obtain an output voltage or current of the target amplitude. The output current or voltage signal is a smooth sine wave, which can produce pleasing music or melody.

[0110] In step 105, the power battery is heated using the adjusted pulse current. The specific heating process can be found in relevant pulse current heating technologies, and will not be described in detail here.

[0111] The following specific examples illustrate the application scenarios and implementation methods of the pulse heating method for power batteries according to embodiments of the present invention:

[0112] Example of application scenarios:

[0113] Application Scenario 1: Low-Temperature Charging Scenario: In cold or low-temperature environments, the charging efficiency of power batteries will decrease significantly, the charging time will be prolonged, and the battery life may also be affected. Pulse heating can heat the power battery before or during charging, allowing it to quickly reach the appropriate charging temperature, thereby improving charging efficiency and shortening charging time.

[0114] Application Scenario 2: Vehicle Starting and Driving: Low temperatures reduce battery output power, leading to difficulty starting the vehicle and decreased power performance. In cold or low-temperature environments, pulse heating can quickly preheat the battery before starting the vehicle, improving battery performance and enabling the vehicle to start smoothly and drive normally. During vehicle operation, pulse heating can also continuously maintain the battery temperature, ensuring stable battery output power and improving vehicle power performance.

[0115] Application Scenario 3: Parking Insulation Scenario: When a vehicle is parked in a low-temperature environment for an extended period, the battery temperature will gradually decrease. Pulse heating can be activated while the vehicle is parked to maintain the battery temperature within a suitable range, preventing damage to the battery due to prolonged low temperatures and preparing it for subsequent vehicle start-up and use.

[0116] Figure 6 This is a flowchart illustrating one embodiment of the pulse heating method for a power battery according to an embodiment of the present invention. Figure 6 As shown, the method includes:

[0117] Step 601: When the pulse heating function is turned on, obtain the melody or music selected by the user;

[0118] Step 602: Based on the melody or music selected by the user, analyze and generate the corresponding audio signal S. out Audio signal S out The pitch at a specific moment;

[0119] Step 603: Based on the relationship and structure between the pulse current generator and the vehicle, obtain the resonance transfer function G1(s);

[0120] Step 604: Obtain the gain function G2(s) that is adjusted according to the user's preferences and set based on the gain of each frequency band;

[0121] Step 605: The vehicle control unit employs negative feedback control, based on the current audio signal S. out The target current signal I required to generate a melody that matches the user's listening experience is calculated using G1(s) and G2(s).

[0122] Step 606: The vehicle control unit sends the target current signal I to the pulse current generating device, which calculates the PWM signal or sequence that needs to be modulated for the target current signal I.

[0123] Step 607: The pulse current generating device outputs a pulse current in real time according to the PWM signal or sequence, and controls the heating of the power battery according to the pulse current.

[0124] Through the above embodiments, a target current signal is generated based on the target audio parameters, and a PWM signal is generated based on the target current signal. The pulse current is directly adjusted in the time domain using the PWM signal, and the adjusted pulse current is used to heat the power battery. Therefore, through a simple control process, the resonance sound caused by the pulse current can be quickly and effectively converted into music or melody, improving the user's driving experience and comfort.

[0125] In addition, since the pulse current only needs to be adjusted using PWM in the time domain and not controlled or adjusted in the frequency domain, the pulse current will not be affected, and thus the heating effect on the power battery will not be affected.

[0126] In addition, the resonance sound caused by the pulsed current in this method can be transformed into music or melody with sine waves or similar waveforms, which has a good auditory effect, can make users feel happy, and improve the user experience.

[0127] Second aspect of the embodiments

[0128] A second aspect of the present invention provides a pulse current generating device, which corresponds to a portion of the steps of the pulse heating method for a power battery described in the first aspect of the present invention, for example... Figure 1 Steps 103 and 104 in the process. The function of the pulse current generating device can be referred to the relevant description in the embodiment of the first aspect, and the repeated content will not be described in detail again.

[0129] Figure 7 This is a block diagram of a pulse current generating device according to an embodiment of the present invention. Figure 7 As shown, the pulse current generating device 700 includes:

[0130] The calculation unit 701 calculates a pulse width modulation (PWM) signal based at least on the target current signal; and

[0131] Output unit 702 uses a pulse width modulation (PWM) signal to regulate the pulse current and outputs the regulated pulse current.

[0132] The target current signal is generated based on the target audio parameters.

[0133] In some embodiments, the calculation unit 701 calculates a pulse width modulation (PWM) signal based on the frequency characteristics of the target current signal and other noises inside the vehicle.

[0134] For details regarding the specific functions of the calculation unit 701 and the output unit 702, please refer to the relevant steps in the embodiment of the first aspect, which will not be repeated here.

[0135] Through the above embodiments, a target current signal is generated based on the target audio parameters, and a PWM signal is generated based on the target current signal. The pulse current is directly adjusted in the time domain using the PWM signal, and the adjusted pulse current is used to heat the power battery. Therefore, through a simple control process, the resonance sound caused by the pulse current can be quickly and effectively converted into music or melody, improving the user's driving experience and comfort.

[0136] In addition, since the pulse current only needs to be adjusted using PWM in the time domain and not controlled or adjusted in the frequency domain, the pulse current will not be affected, and thus the heating effect on the power battery will not be affected.

[0137] In addition, the resonance sound caused by the pulsed current in this method can be transformed into music or melody with sine waves or similar waveforms, which has a good auditory effect, can make users feel happy, and improve the user experience.

[0138] Third aspect of the embodiments

[0139] A third aspect of the present invention provides a pulse heating system for a power battery, which corresponds to the pulse heating method for a power battery described in the first aspect of the present invention. In addition, the pulse heating system for the power battery may include the pulse current generating device described in the second aspect of the present invention, and the repeated content will not be described in detail.

[0140] Figure 8 This is a block diagram of a pulse heating system for a power battery according to an embodiment of the present invention. Figure 8 As shown, the pulse heating system 800 for the power battery includes:

[0141] Acquisition unit 801 acquires the target audio parameters;

[0142] The vehicle control unit 802 generates a target current signal based on the target audio parameters;

[0143] A pulse current generating device 803 receives at least a target current signal as input and outputs a pulse current adjusted using a pulse width modulation (PWM) signal; and

[0144] The heating unit 804 uses a regulated pulse current to heat the power battery.

[0145] In some embodiments, the acquisition unit 801 may be located in the vehicle, for example in the vehicle infotainment system, or it may be located in a cloud server.

[0146] In some embodiments, the vehicle control unit 802, the pulse current generating device 803, and the heating unit 804 are disposed in the vehicle.

[0147] For details regarding the specific functions of the acquisition unit 801, vehicle control unit 802, pulse current generating device 803, and heating unit 804, please refer to the specific content of the relevant steps in the embodiment of the first aspect, which will not be repeated here.

[0148] Through the above embodiments, a target current signal is generated based on the target audio parameters, and a PWM signal is generated based on the target current signal. The pulse current is directly adjusted in the time domain using the PWM signal, and the adjusted pulse current is used to heat the power battery. Therefore, through a simple control process, the resonance sound caused by the pulse current can be quickly and effectively converted into music or melody, improving the user's driving experience and comfort.

[0149] In addition, since the pulse current only needs to be adjusted using PWM in the time domain and not controlled or adjusted in the frequency domain, the pulse current will not be affected, and thus the heating effect on the power battery will not be affected.

[0150] In addition, the resonance sound caused by the pulsed current in this method can be transformed into music or melody with sine waves or similar waveforms, which has a good auditory effect, can make users feel happy, and improve the user experience.

[0151] Fourth aspect of the embodiment

[0152] This invention provides a vehicle that includes the pulse current generating device described in the second aspect of the embodiment or the pulse heating system for a power battery described in the third aspect of the embodiment.

[0153] In some embodiments, the vehicle may be a vehicle for various purposes, such as a passenger car, a truck, etc.

[0154] In some embodiments, the vehicle can be a variety of vehicles that use power batteries, such as new energy vehicles, hybrid electric vehicles, etc.

[0155] When the pulse heating method for a power battery described in the first aspect of the present invention, the pulse current generating device described in the second aspect of the present invention, or the pulse heating system for a power battery described in the third aspect of the present invention are applied to a vehicle, they can quickly and effectively convert the resonance sound caused by the pulse current into music or melody through a simple control process, thereby improving the user's driving experience and comfort.

[0156] This invention also provides a computer-readable program, wherein when the program is executed, the program causes the computer to perform the pulse heating method for the power battery according to this invention.

[0157] This invention also provides a computer-readable storage medium storing a computer program that causes a computer to execute the pulse heating method for a power battery according to this invention.

[0158] The apparatus and methods described above in the embodiments of the present invention can be implemented in hardware or in combination with software. The present invention relates to a computer-readable program that, when executed by a logic component, enables the logic component to implement the aforementioned apparatus or constituent parts, or to implement the various methods or steps described above.

[0159] The embodiments of the present invention also relate to storage media for storing the above programs, such as hard disks, magnetic disks, optical disks, DVDs, flash memory, etc.

[0160] It should be noted that the limitations of each step involved in the embodiments of the present invention are not considered as limiting the order of steps without affecting the implementation of the specific solution. The steps listed first can be executed first, or they can be executed later, or they can even be executed simultaneously. As long as the solution can be implemented, they should be considered to fall within the protection scope of the present invention.

[0161] The present invention has been described above with reference to specific embodiments. However, those skilled in the art should understand that these descriptions are exemplary and not intended to limit the scope of protection of the present invention. Those skilled in the art can make various modifications and variations to the present invention based on its spirit and principles, and these modifications and variations are also within the scope of the present invention.

Claims

1. A pulse heating method for a power battery, characterized in that, The pulse heating method includes: Obtain the target audio parameters; At least based on the target audio parameters, generate a target current signal; At least based on the target current signal, calculate the pulse width modulation (PWM) signal for regulating the current; The pulse current is adjusted using the pulse width modulation (PWM) signal, and the adjusted pulse current is output; and The power battery is heated using a regulated pulse current.

2. The pulse heating method for a power battery according to claim 1, characterized in that, Obtain the target audio parameters, including: Obtain a predetermined melody or music that is selected by the user; Based on the melody or music, a corresponding time-domain audio signal is generated as the target audio parameter or a part of the target audio parameter.

3. The pulse heating method for a power battery according to claim 2, characterized in that, The method further includes: Update the melody or music based on the user's operation instructions; Based on the updated melody or music, a corresponding time-domain audio signal is generated, and the target audio parameters or a portion of the target audio parameters are updated.

4. The pulse heating method for a power battery according to claim 1, characterized in that, The target current signal is a sine wave signal or a near-sine wave signal.

5. The pulse heating method for a power battery according to any one of claims 1-4, characterized in that, At least based on the target audio parameters, generate a target current signal, including: The target current signal is generated based on the target audio parameters, the sound resonance transfer function, and the audio gain function. The sound resonance transfer function is determined based on the relationship and structure between the pulse current generating device that outputs the pulse current and the vehicle, and the audio gain function is adjusted according to the user's preferences and set based on the gain of each frequency band.

6. The pulse heating method for a power battery according to claim 5, characterized in that, The target audio parameters include time-domain audio signals. The target current signal is equal to the product of the time-domain audio signal, the sound resonance transfer function, and the audio gain function.

7. The pulse heating method for a power battery according to claim 1, characterized in that, The modulation frequency of the pulse width modulation (PWM) signal is greater than a preset threshold, which is the upper limit of the sound frequency that the human ear can perceive.

8. The pulse heating method for a power battery according to claim 1 or 7, characterized in that, The pulse width modulation (PWM) signal is a pulse width modulation (PWM) signal or a sequence of pulse width modulation (PWM) signals at a certain moment.

9. The pulse heating method for a power battery according to claim 1 or 7, characterized in that, The pulse current is regulated using the pulse width modulation (PWM) signal, and the regulated pulse current is output, including: The pulse width modulation (PWM) signal is input into the switching element; The amplitude of the pulse current output by the switching element is adjusted using the pulse width modulation (PWM) signal to obtain the adjusted pulse current.

10. The pulse heating method for a power battery according to claim 1, characterized in that, At least based on the target current signal, calculate the pulse width modulation (PWM) signal for regulating the current, including: The pulse width modulation (PWM) signal is calculated based on the frequency characteristics of the target current signal and other noises inside the vehicle.

11. A pulse current generating device, characterized in that, The pulse current generating device includes: The computing unit calculates a pulse width modulation (PWM) signal based at least on the target current signal; and The output unit uses the pulse width modulation (PWM) signal to adjust the pulse current and outputs the adjusted pulse current. The target current signal is generated based on the target audio parameters.

12. The pulse current generating device according to claim 11, characterized in that, The calculation unit calculates the pulse width modulation (PWM) signal based on the frequency characteristics of the target current signal and other noises inside the vehicle.

13. A pulse heating system for a power battery, characterized in that, The pulse heating system includes: The acquisition unit acquires the target audio parameters; The vehicle control unit generates a target current signal based on the target audio parameters; A pulse current generating device, which at least receives the target current signal and outputs a pulse current adjusted using a pulse width modulation (PWM) signal; and The heating unit uses a regulated pulse current to heat the power battery.

14. A vehicle, characterized in that, The vehicle includes the pulse current generating device of claim 11 or 12, or the vehicle includes the pulse heating system of the power battery of claim 13.

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