Battery heating control method, device, medium, system, vehicle and chip

Abstract

The present disclosure relates to a battery heating control method, device, medium, system, vehicle and chip, the method comprising: obtaining first state information of a high-voltage battery and second state information of a low-voltage battery; in response to determining that a battery heating condition is met according to the first state information and the second state information, controlling the working state of a DCDC converter coupled between the high-voltage battery and the low-voltage battery, so that the high-voltage battery and the low-voltage battery alternately charge each other. In this way, in the case that the battery needs to be heated, the energy can be converted between the high-voltage battery and the low-voltage battery through the DCDC converter, forming a positive-negative alternating pulse current, and the positive-negative alternating pulse current can heat the interior of the high-voltage battery and the low-voltage battery through the battery cells of the high-voltage battery and the low-voltage battery.

Description

Technical Field

[0001] This disclosure relates to the field of batteries, and more particularly to a battery heating control method, apparatus, medium, system, vehicle, and chip. Background Technology

[0002] In northern regions, the cold winter weather can significantly reduce the effective capacity of batteries. Taking electric vehicles as an example, when a vehicle is restarted after being parked for a long time, the battery temperature is low, the charging and discharging power of the battery is reduced, resulting in decreased vehicle power or even inability to drive. The vehicle's kinetic energy recovery is affected, the electric braking effect is affected, and the charging time is also prolonged. Therefore, it is necessary to heat the battery in low-temperature environments. Summary of the Invention

[0003] To overcome the problems existing in related technologies, this disclosure provides a battery heating control method, apparatus, medium, system, vehicle, and chip.

[0004] According to a first aspect of the present disclosure, a battery heating control method is provided, the method comprising:

[0005] Obtain the first state information of the high-voltage battery and the second state information of the low-voltage battery;

[0006] In response to determining that the battery heating conditions are met based on the first state information and the second state information, the operating state of the DC-DC converter coupled between the high-voltage battery and the low-voltage battery is controlled so that the high-voltage battery and the low-voltage battery alternately charge each other.

[0007] Optionally, the first status information includes the battery temperature and SOC value of the high-voltage battery, and the second status information includes the battery temperature of the low-voltage battery.

[0008] Specifically, when the device containing the high-voltage battery and the low-voltage battery is in a static state, the device is not connected to an external charging device to form an external high-voltage circuit, and the SOC value of the high-voltage battery is greater than the SOC value threshold:

[0009] If the battery temperature of the high-voltage battery is less than the first temperature threshold and greater than the second temperature threshold, or the battery temperature of the low-voltage battery is less than the third temperature threshold and greater than the fourth temperature threshold, then the battery heating conditions are determined to be met.

[0010] Optionally, the second state information includes the SOC value of the low-voltage battery;

[0011] Controlling the operating state of the DC-DC converter to allow the high-voltage battery and the low-voltage battery to alternately charge each other includes:

[0012] If the SOC value of the low-voltage battery is greater than the upper limit of the preset SOC value range, the operating state of the DC-DC converter is controlled so that the high-voltage battery and the low-voltage battery alternately charge each other in the following manner: the low-voltage battery charges the high-voltage battery first.

[0013] Optionally, the second state information includes the SOC value of the low-voltage battery;

[0014] Controlling the operating state of the DC-DC converter to allow the high-voltage battery and the low-voltage battery to alternately charge each other includes:

[0015] If the SOC value of the low-voltage battery is less than the lower limit of the preset SOC value range, the operating state of the DC-DC converter is controlled so that the high-voltage battery and the low-voltage battery alternately charge each other in the following manner: the high-voltage battery charges the low-voltage battery first.

[0016] Optionally, the second state information includes the SOC value of the low-voltage battery;

[0017] Controlling the operating state of the DC-DC converter to allow the high-voltage battery and the low-voltage battery to alternately charge each other includes:

[0018] If the SOC value of the low-voltage battery is greater than the upper limit of the preset SOC value range, the working state of the DC-DC converter is controlled so that the low-voltage battery charges the high-voltage battery until the SOC value of the low-voltage battery drops to the SOC value range, and then the high-voltage battery and the low-voltage battery alternately charge each other.

[0019] Optionally, the second state information includes the SOC value of the low-voltage battery;

[0020] Controlling the operating state of the DC-DC converter to allow the high-voltage battery and the low-voltage battery to alternately charge each other includes:

[0021] If the SOC value of the low-voltage battery is less than the lower limit of the preset SOC value range, the working state of the DC-DC converter is controlled so that the high-voltage battery charges the low-voltage battery until the SOC value of the low-voltage battery rises to the SOC value range, and then the high-voltage battery and the low-voltage battery alternately charge each other.

[0022] Optionally, the first state information includes the battery temperature and SOC value of the high-voltage battery, and the second state information includes the battery temperature and SOC value of the low-voltage battery; the method further includes:

[0023] Based on the first state information and the second state information, a phase diagram of the current corresponding to the low-voltage battery side or the high-voltage battery side is generated.

[0024] The control of the operating state of the DC-DC converter includes:

[0025] The charging current between the high-voltage battery and the low-voltage battery is controlled according to the phase diagram.

[0026] Optionally, the method further includes:

[0027] In response to determining that the alternating charging duration has reached a preset duration threshold, the operating state of the DC-DC converter is controlled so that the high-voltage battery and the low-voltage battery stop alternating to charge each other.

[0028] According to a second aspect of the present disclosure, a battery heating control device is provided, the device comprising:

[0029] The acquisition module is used to acquire the first state information of the high-voltage battery and the second state information of the low-voltage battery.

[0030] The control module is configured to, in response to determining, based on the first state information and the second state information, that the battery heating conditions are met, control the operating state of the DC-DC converter coupled between the high-voltage battery and the low-voltage battery, so that the high-voltage battery and the low-voltage battery alternately charge each other.

[0031] Optionally, the first status information includes the battery temperature and SOC value of the high-voltage battery, and the second status information includes the battery temperature of the low-voltage battery.

[0032] The control module is configured to operate when the device containing the high-voltage battery and the low-voltage battery is stationary, the device is not connected to an external charging device to form an external high-voltage circuit, and the SOC value of the high-voltage battery is greater than a SOC value threshold.

[0033] If the battery temperature of the high-voltage battery is less than the first temperature threshold and greater than the second temperature threshold, or the battery temperature of the low-voltage battery is less than the third temperature threshold and greater than the fourth temperature threshold, then the battery heating conditions are determined to be met.

[0034] Optionally, the second state information includes the SOC value of the low-voltage battery; the control module is configured to control the operating state of the DC-DC converter if the SOC value of the low-voltage battery is greater than the upper limit of the preset SOC value range, so that the high-voltage battery and the low-voltage battery alternately charge each other in the following manner: the low-voltage battery charges the high-voltage battery first.

[0035] Optionally, the second state information includes the SOC value of the low-voltage battery; the control module is configured to control the operating state of the DC-DC converter if the SOC value of the low-voltage battery is less than a preset lower limit of the SOC value range, so that the high-voltage battery and the low-voltage battery alternately charge each other in the following manner: the high-voltage battery charges the low-voltage battery first.

[0036] Optionally, the second state information includes the SOC value of the low-voltage battery; the control module is configured to control the operating state of the DC-DC converter if the SOC value of the low-voltage battery is greater than the upper limit of the preset SOC value range, so that the low-voltage battery charges the high-voltage battery until the SOC value of the low-voltage battery drops to the SOC value range, and then the high-voltage battery and the low-voltage battery alternately charge each other.

[0037] Optionally, the second state information includes the SOC value of the low-voltage battery; the control module is configured to control the operating state of the DC-DC converter if the SOC value of the low-voltage battery is less than a preset lower limit of the SOC value range, so that the high-voltage battery charges the low-voltage battery until the SOC value of the low-voltage battery rises to the SOC value range, and then the high-voltage battery and the low-voltage battery alternately charge each other.

[0038] Optionally, the first status information includes the battery temperature and SOC value of the high-voltage battery, and the second status information includes the battery temperature and SOC value of the low-voltage battery; the device further includes:

[0039] The generation module is used to generate a phase diagram of the current corresponding to the low-voltage battery side or the high-voltage battery side based on the first state information and the second state information.

[0040] The control module is also used to control the charging current between the high-voltage battery and the low-voltage battery according to the phase diagram.

[0041] Optionally, the control module is further configured to control the operating state of the DC-DC converter in response to determining that the alternating charging duration has reached a preset duration threshold, so as to stop the high-voltage battery and the low-voltage battery from alternatingly charging each other.

[0042] According to a third aspect of the present disclosure, a battery heating control device is provided, comprising:

[0043] processor;

[0044] Memory used to store processor-executable instructions;

[0045] The processor is configured to execute the battery heating control method provided in the first aspect of this disclosure.

[0046] According to a fourth aspect of the present disclosure, a non-transitory computer-readable storage medium is provided, having stored thereon computer program instructions that, when executed by a processor, implement the steps of the battery heating control method provided in the first aspect of the present disclosure.

[0047] According to a fifth aspect of the present disclosure, a battery heating system is provided, comprising: a high-voltage battery, a low-voltage battery, a DC-DC converter coupled between the high-voltage battery and the low-voltage battery, and a controller controlled and connected to the DC-DC converter, wherein the controller is configured to perform the battery heating control method provided in the first aspect of the present disclosure.

[0048] According to a sixth aspect of the present disclosure, a vehicle is provided, including the battery heating system provided in the fifth aspect of the present disclosure.

[0049] According to a seventh aspect of the present disclosure, a chip is provided, including a processor and an interface; the processor is configured to read instructions to execute the battery heating control method provided in the first aspect of the present disclosure.

[0050] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0051] If, based on the first and second state information, it is determined that the battery needs to be heated, the operating state of the DC-DC converter coupled between the high-voltage and low-voltage batteries can be controlled to allow the high-voltage and low-voltage batteries to alternately charge each other. In this way, the DC-DC converter can convert energy between the high-voltage and low-voltage batteries, forming alternating positive and negative pulse currents. These alternating pulse currents pass through the cells of the high-voltage and low-voltage batteries, heating their internal components to heat the battery in low-temperature environments.

[0052] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0053] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0054] Figure 1 This is a flowchart illustrating a battery heating control method according to an exemplary embodiment.

[0055] Figure 2 This is a topology diagram of a battery heating control device according to an exemplary embodiment.

[0056] Figure 3 This is a phase diagram of the high-voltage battery side current according to an exemplary embodiment.

[0057] Figure 4 This is a schematic diagram illustrating the operating state of a DC-DC converter when a high-voltage battery charges a low-voltage battery, according to an exemplary embodiment.

[0058] Figure 5 This is a schematic diagram illustrating the operating state of a DC-DC converter when a low-voltage battery is charging a high-voltage battery, according to an exemplary embodiment.

[0059] Figure 6 This is a block diagram illustrating a battery heating control device according to an exemplary embodiment.

[0060] Figure 7 This is a block diagram illustrating a battery heating control device according to an exemplary embodiment. Detailed Implementation

[0061] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0062] It should be noted that all actions involving the acquisition of signals, information, or data in this application are carried out in compliance with the relevant data protection laws and policies of the country where the application is located, and with the authorization granted by the owner of the relevant device.

[0063] Currently, battery cell insulation mostly employs external heating methods such as heating films, or uses on-board LC (L represents inductance, C represents capacitance) oscillation modules for self-heating. However, these methods require additional heating devices or pulse waveform generation and control devices. This disclosure provides a battery heating control method that heats the battery in low-temperature environments without adding additional devices.

[0064] Figure 1 This is a flowchart of a battery heating control method provided in an exemplary embodiment of this disclosure. Figure 1As shown, the method may include steps S101 to S102. It should be noted that the method provided in this disclosure can be applied to battery heating technologies in various fields, such as electric vehicles, electric aircraft, etc. To better understand this disclosure, the following will use an application in the vehicle field as an example for illustration. However, it should be understood that the example in the vehicle field should not be construed as limiting the application scope and protection scope of this disclosure.

[0065] S101, obtain the first state information of the high-voltage battery and the second state information of the low-voltage battery.

[0066] For example, electric vehicles typically include a high-voltage battery (power battery) and a low-voltage battery (e.g., a 12V storage battery). The high-voltage battery provides energy to power devices such as drive motors, while the low-voltage battery provides energy to electrical equipment such as instruments, blowers, and central control screens. The acquired first state information of the high-voltage battery and the second state information of the low-voltage battery can provide real-time feedback on the states of the high-voltage and low-voltage batteries to determine whether the battery heating conditions are met.

[0067] S102, in response to determining that the battery heating conditions are met based on the first state information and the second state information, controls the operating state of the DC-DC converter coupled between the high-voltage battery and the low-voltage battery so that the high-voltage battery and the low-voltage battery alternately charge each other.

[0068] Figure 2 This is a topology diagram of a battery heating control device according to an exemplary embodiment. Currently, in electric vehicles, DC-DC converters are used to rectify and filter high-voltage electricity to charge low-voltage batteries. The inventors discovered that, based on existing DC-DC converters, low-voltage electricity can also be rectified and filtered to charge high-voltage batteries. However, considering the adverse effects of low-temperature environments on batteries, the inventors conceived of controlling the operating state of the DC-DC converter coupled between the high-voltage and low-voltage batteries to allow them to alternately charge each other. The DC-DC converter continuously converts energy between the high-voltage and low-voltage batteries, forming alternating positive and negative pulse currents. These alternating pulse currents pass through the cells of the high-voltage and low-voltage batteries, heating their internal components to achieve battery heating in low-temperature environments.

[0069] Through the above technical solution, when it is determined that the battery needs to be heated based on the first and second state information, the operating state of the DC-DC converter coupled between the high-voltage and low-voltage batteries can be controlled, so that the high-voltage and low-voltage batteries alternately charge each other. In this way, the DC-DC converter can convert energy between the high-voltage and low-voltage batteries, forming a positive and negative alternating pulse current. This alternating pulse current passes through the cells of the high-voltage and low-voltage batteries, heating their internal components to heat the battery in low-temperature environments.

[0070] Optionally, the first state information may include the battery temperature and SOC value of the high-voltage battery, and the second state information may include the battery temperature of the low-voltage battery.

[0071] Among them, when the equipment containing the high-voltage battery and the low-voltage battery is in a static state, the equipment is not connected to an external charging device to form an external high-voltage circuit, and the SOC value of the high-voltage battery is greater than the SOC value threshold:

[0072] If the battery temperature of the high-voltage battery is less than the first temperature threshold and greater than the second temperature threshold, or the battery temperature of the low-voltage battery is less than the third temperature threshold and greater than the fourth temperature threshold, then the battery heating conditions are determined to be met.

[0073] The SOC (State of Charge) value refers to the battery's state of charge, also known as remaining capacity, representing the battery's ability to continue operating. For example, the SOC value can be estimated using parameters such as battery terminal voltage, charging / discharging current, and internal resistance. The battery temperature of a high-voltage battery can be obtained using a temperature sensor placed near it, and the battery temperature of a low-voltage battery can be obtained using a temperature sensor placed near it. The SOC threshold can be preset, for example, set to 10%. If the SOC value of a high-voltage battery is 5%, it can be determined that the remaining energy inside the high-voltage battery is extremely low. Since the battery heating process consumes some energy, to avoid energy consumption and instead of using its own energy to heat the battery, it can be heated passively from the outside.

[0074] If the device containing the high-voltage and low-voltage batteries is not stationary, it indicates that the device is in motion. Taking a vehicle as an example, when the vehicle is in motion, both the high-voltage and low-voltage batteries are discharging. During vehicle operation, internal components such as the engine generate heat, which can be used to keep the batteries warm. Furthermore, the low-voltage battery stores less energy, so to ensure normal vehicle operation, it prioritizes powering electrical devices such as the instrument panel, blower, and central control screen. If the vehicle is connected to an external charging device, forming an external high-voltage circuit, it indicates that the vehicle is currently or intends to charge the high-voltage battery via an external charging device (such as a charging gun). To ensure charging efficiency, the battery can be heated before connecting the external charging device to form the external high-voltage circuit.

[0075] For example, forcibly controlling battery operation under excessively low ambient temperatures can cause irreversible damage. Therefore, most batteries on the market are not allowed to be charged after reaching a certain temperature. Thus, by setting battery temperature thresholds, it can be determined whether the battery needs heating and whether it can be charged and discharged under current conditions. Taking a high-voltage battery as an example, the first temperature threshold can be preset according to the high-voltage battery performance, for example, it can be set to -20℃; the second temperature threshold can also be preset according to the high-voltage battery performance, for example, it can be set to -35℃. Taking a low-voltage battery as an example, the third temperature threshold can be preset according to the low-voltage battery performance, for example, it can be set to -20℃; the fourth temperature threshold can also be preset according to the low-voltage battery performance, for example, it can be set to -35℃. For example, if the high-voltage battery's SOC value is 65%, the vehicle is stationary, and no external charging equipment is connected to form an external high-voltage circuit, and if the high-voltage battery temperature is -29℃ and the low-voltage battery temperature is -21℃, then it can be determined that the battery heating conditions are met, that is, the battery needs to be heated, and the battery can be charged and discharged under the current temperature conditions.

[0076] Optionally, the second state information may include the SOC value of the low-voltage battery;

[0077] In S102, controlling the operating state of the DC-DC converter to allow the high-voltage and low-voltage batteries to alternately charge each other may include:

[0078] If the SOC value of the low-voltage battery is greater than the upper limit of the preset SOC value range, the operating state of the DC-DC converter is controlled so that the high-voltage battery and the low-voltage battery alternately charge each other in the following manner: the low-voltage battery charges the high-voltage battery first.

[0079] In S102, controlling the operating state of the DC-DC converter to allow the high-voltage battery and the low-voltage battery to alternately charge each other may also include:

[0080] If the SOC value of the low-voltage battery is less than the preset lower limit of the SOC value range, the operating state of the DC-DC converter is controlled so that the high-voltage battery and the low-voltage battery alternately charge each other in the following manner: the high-voltage battery charges the low-voltage battery first.

[0081] For example, the SOC range can be preset, such as 45% to 55%. If the SOC of the low-voltage battery is 70%, it can first charge the high-voltage battery, and then switch to the high-voltage battery charging the low-voltage battery, repeating this process to achieve alternating charging between the high-voltage and low-voltage batteries. If the SOC of the low-voltage battery is 30%, it can first charge the low-voltage battery, and then switch to the low-voltage battery charging the high-voltage battery, repeating this process to achieve alternating charging between the high-voltage and low-voltage batteries. The closer the SOC of the low-voltage battery is to the SOC range, the better its operating condition. Determining whether to prioritize charging or discharging the low-voltage battery based on its SOC value can improve its operating condition to some extent.

[0082] Optionally, the first state information may include the battery temperature and SOC value of the high-voltage battery, and the second state information may include the battery temperature and SOC value of the low-voltage battery; the battery heating control method provided in this disclosure may further include:

[0083] Based on the first state information and the second state information, a phase diagram of the current corresponding to the low-voltage battery side or the high-voltage battery side is generated.

[0084] Controlling the operating state of a DC-DC converter can include:

[0085] Based on the phase diagram, the charging current between the high-voltage battery and the low-voltage battery is controlled.

[0086] For example, under the condition that battery heating is satisfied, the charging and discharging currents of the battery differ at different battery temperatures and different SOC values. For instance, based on first and second state information, the maximum current values ​​of the low-voltage and high-voltage batteries in the current state can be determined by querying the preset correspondence between the first and second state information and the maximum current values ​​allowed to pass through the low-voltage and high-voltage batteries. The frequency of current direction changes in which the low-voltage and high-voltage batteries alternately charge each other can be preset by relevant technicians. Given the determined maximum current value and current direction change frequency, a current phase diagram can be generated. Figure 3The diagram shows the phase diagram of the current corresponding to the high-voltage battery side. The phase diagram of the current corresponding to the low-voltage battery side corresponds to this diagram. Therefore, generating either the phase diagram of the current corresponding to the low-voltage battery side or the high-voltage battery side is sufficient. Based on the generated phase diagram, the amplitude and frequency of the current can be controlled by a DC-DC converter to control the energy conversion between the high-voltage and low-voltage batteries, forming a positive and negative alternating pulse current.

[0087] Figure 4 This is a schematic diagram illustrating the operating state of a DC-DC converter when a high-voltage battery charges a low-voltage battery, according to an exemplary embodiment. Figure 5 This is a schematic diagram illustrating the operating state of a DC-DC converter when a low-voltage battery is charging a high-voltage battery, according to an exemplary embodiment. Figure 4 and Figure 5 As shown, the DC-DC converter includes switches T1, T2, T3, and T4 located on the left side of the transformer and switches S1, S2, S3, and S4 located on the right side of the transformer. C1 and C2 are DC blocking capacitors. The left side is connected to a high-voltage battery, and the right side is connected to a low-voltage battery.

[0088] like Figure 3 As shown, during the process from 0 to t2, the high-voltage battery charges the low-voltage battery. From T1 to T4, the circuit is closed. During the stage from 0 to t1, S1 and S4 are open, while S2 and S3 are closed. The primary current (high-voltage battery side current) is continuously increased by adjusting the duty cycle. The current path is as follows: Figure 4 As shown; at time t1, S1 and S4 are closed, and S2 and S3 are opened. During the t1 to t2 period, the magnitude of the primary current (high-voltage battery side current) is continuously reduced by adjusting the duty cycle. Figure 3 As shown, during the process from t2 to t4, the low-voltage battery charges the high-voltage battery, and S1 to S4 are in the off state. Starting at time t2, T1 and T4 are turned on, and T2 and T3 are turned off. The duty cycle is adjusted to control the current magnitude to rise in the opposite direction. The current path is as follows. Figure 5 As shown; at time t3, T1 and T4 are turned off, and T2 and T3 are turned on, adjusting the duty cycle to control the decrease in current magnitude. This cycle repeats continuously, converting energy between the high-voltage and low-voltage batteries. The alternating positive and negative pulse current passes through the cells of the high-voltage and low-voltage batteries, heating their internal components.

[0089] Optionally, the second state information may include the SOC value of the low-voltage battery;

[0090] In S102, controlling the operating state of the DC-DC converter to allow the high-voltage and low-voltage batteries to alternately charge each other may include:

[0091] If the SOC value of the low-voltage battery is greater than the upper limit of the preset SOC value range, the working state of the DC-DC converter is controlled so that the low-voltage battery charges the high-voltage battery until the SOC value of the low-voltage battery drops to the SOC value range, and then the high-voltage battery and the low-voltage battery alternately charge each other.

[0092] In S102, controlling the operating state of the DC-DC converter to allow the high-voltage battery and the low-voltage battery to alternately charge each other may also include:

[0093] If the SOC value of the low-voltage battery is less than the preset lower limit of the SOC value range, the working state of the DC-DC converter is controlled so that the high-voltage battery charges the low-voltage battery until the SOC value of the low-voltage battery rises to the SOC value range, and then the high-voltage battery and the low-voltage battery alternately charge each other.

[0094] For example, as mentioned above, the SOC range can be preset to 45% to 55%. Within this range, the low-voltage battery is in its optimal state, capable of withstanding the maximum current and achieving the best heating effect. For instance, if the low-voltage battery is fully charged (SOC 100%), the oscillations generated during the alternating charging of the high-voltage and low-voltage batteries may cause the low-voltage battery's instantaneous voltage to exceed its limit, resulting in irreversible damage. Therefore, before controlling the alternating charging of the high-voltage and low-voltage batteries, the low-voltage battery should first charge the high-voltage battery to keep its SOC within the specified range. This ensures optimal heating while preventing battery damage. As another example, if the low-voltage battery's SOC is 6%, regardless of whether charging or discharging is prioritized, the low-voltage battery is in a poor operating state, can withstand a smaller current, and experiences a smaller amplitude of the alternating positive and negative pulse current through the battery cell, resulting in poor heating. Therefore, before the high-voltage and low-voltage batteries alternately charge each other, the high-voltage battery first charges the low-voltage battery to keep its State of Charge (SOC) value within the specified range. This ensures optimal heating performance of the battery.

[0095] Optionally, the battery heating control method provided in this disclosure further includes:

[0096] In response to determining that the alternating charging time has reached a preset time threshold, the operating state of the DC-DC converter is controlled so that the high-voltage battery and the low-voltage battery stop alternating to charge each other.

[0097] For example, the duration threshold can be preset, such as to 10 hours. If the high-voltage and low-voltage batteries alternately charge each other for an extended period without a significant increase in their temperatures, it indicates that the ambient temperature is too low. The heat provided by the alternating charging of the high-voltage and low-voltage batteries is insufficient to heat the batteries. Continuing the alternating charging and discharging not only fails to heat the batteries but also wastes energy. In this case, the high-voltage and low-voltage batteries can be stopped from alternating charging, and the batteries can be warmed up through passive external heating. Therefore, energy waste can be avoided by controlling the duration of alternating charging.

[0098] If the battery heating conditions are no longer met or a stop heating command is received from the user, the high-voltage battery and the low-voltage battery can be controlled to stop alternating to charge each other.

[0099] Figure 6 This is a block diagram illustrating a battery heating control device according to an exemplary embodiment. (Refer to...) Figure 6 The device includes an acquisition module 601 and a control module 602.

[0100] The acquisition module 601 is used to acquire the first state information of the high-voltage battery and the second state information of the low-voltage battery;

[0101] The control module 602 is configured to, in response to determining, based on the first state information and the second state information, that the battery heating conditions are met, control the operating state of the DC-DC converter coupled between the high-voltage battery and the low-voltage battery, so that the high-voltage battery and the low-voltage battery alternately charge each other.

[0102] If, based on the first and second state information, it is determined that the battery needs to be heated, the operating state of the DC-DC converter coupled between the high-voltage and low-voltage batteries can be controlled to allow the high-voltage and low-voltage batteries to alternately charge each other. In this way, the DC-DC converter can convert energy between the high-voltage and low-voltage batteries, forming alternating positive and negative pulse currents. These alternating pulse currents pass through the cells of the high-voltage and low-voltage batteries, heating their internal components to heat the battery in low-temperature environments.

[0103] Optionally, the first status information includes the battery temperature and SOC value of the high-voltage battery, and the second status information includes the battery temperature of the low-voltage battery.

[0104] The control module 602 is configured to handle situations where the device containing the high-voltage battery and the low-voltage battery is stationary, the device is not connected to an external charging device to form an external high-voltage circuit, and the SOC value of the high-voltage battery is greater than a SOC value threshold.

[0105] If the battery temperature of the high-voltage battery is less than the first temperature threshold and greater than the second temperature threshold, or the battery temperature of the low-voltage battery is less than the third temperature threshold and greater than the fourth temperature threshold, then the battery heating conditions are determined to be met.

[0106] Optionally, the second state information includes the SOC value of the low-voltage battery; the control module 602 is used to control the working state of the DC-DC converter if the SOC value of the low-voltage battery is greater than the upper limit of the preset SOC value range, so that the high-voltage battery and the low-voltage battery alternately charge each other in the following manner: the low-voltage battery charges the high-voltage battery first.

[0107] Optionally, the second state information includes the SOC value of the low-voltage battery; the control module 602 is used to control the working state of the DC-DC converter if the SOC value of the low-voltage battery is less than a preset lower limit of the SOC value range, so that the high-voltage battery and the low-voltage battery alternately charge each other in the following manner: the high-voltage battery charges the low-voltage battery first.

[0108] Optionally, the second state information includes the SOC value of the low-voltage battery; the control module 602 is used to control the working state of the DC-DC converter if the SOC value of the low-voltage battery is greater than the upper limit of the preset SOC value range, so that the low-voltage battery charges the high-voltage battery until the SOC value of the low-voltage battery drops to the SOC value range, and then the high-voltage battery and the low-voltage battery alternately charge each other.

[0109] Optionally, the second state information includes the SOC value of the low-voltage battery; the control module 602 is used to control the working state of the DC-DC converter if the SOC value of the low-voltage battery is less than the lower limit of the preset SOC value range, so that the high-voltage battery charges the low-voltage battery until the SOC value of the low-voltage battery rises to the SOC value range, and then the high-voltage battery and the low-voltage battery alternately charge each other.

[0110] Optionally, the first status information includes the battery temperature and SOC value of the high-voltage battery, and the second status information includes the battery temperature and SOC value of the low-voltage battery; the device 600 further includes:

[0111] The generation module is used to generate a phase diagram of the current corresponding to the low-voltage battery side or the high-voltage battery side based on the first state information and the second state information.

[0112] The control module 602 is also used to control the charging current between the high-voltage battery and the low-voltage battery according to the phase diagram.

[0113] Optionally, the control module 602 is further configured to control the operating state of the DC-DC converter in response to determining that the alternating charging duration has reached a preset duration threshold, so that the high-voltage battery and the low-voltage battery stop alternating to charge each other.

[0114] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0115] This disclosure also provides a computer-readable storage medium having stored thereon computer program instructions that, when executed by a processor, implement the steps of the battery heating control method provided in this disclosure.

[0116] Figure 7 This is a block diagram illustrating a battery heating control device 800 according to an exemplary embodiment. For example, device 800 may be a mobile phone, computer, digital broadcasting terminal, messaging device, game console, tablet device, medical device, fitness equipment, personal digital assistant, etc.

[0117] Reference Figure 7 The device 800 may include one or more of the following components: a processing component 802, a memory 804, a power supply component 806, a multimedia component 808, an audio component 810, an input / output interface 812, a sensor component 814, and a communication component 816.

[0118] Processing component 802 typically controls the overall operation of device 800, such as operations associated with display, telephone calls, data communication, camera operation, and recording. Processing component 802 may include one or more processors 820 to execute instructions to complete all or part of the steps of the battery heating control method described above. Furthermore, processing component 802 may include one or more modules to facilitate interaction between processing component 802 and other components. For example, processing component 802 may include a multimedia module to facilitate interaction between multimedia component 808 and processing component 802.

[0119] Memory 804 is configured to store various types of data to support the operation of device 800. Examples of such data include instructions for any application or method operating on device 800, contact data, phonebook data, messages, pictures, videos, etc. Memory 804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0120] Power supply component 806 provides power to various components of device 800. Power supply component 806 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power to device 800.

[0121] Multimedia component 808 includes a screen that provides an output interface between the device 800 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of the touch or swipe action but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 808 includes a front-facing camera and / or a rear-facing camera. When the device 800 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0122] Audio component 810 is configured to output and / or input audio signals. For example, audio component 810 includes a microphone (MIC) configured to receive external audio signals when device 800 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 804 or transmitted via communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.

[0123] Input / output interface 812 provides an interface between processing component 802 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0124] Sensor assembly 814 includes one or more sensors for providing status assessments of various aspects of device 800. For example, sensor assembly 814 may detect the on / off state of device 800, the relative positioning of components such as the display and keypad of device 800, changes in the position of device 800 or a component of device 800, the presence or absence of user contact with device 800, the orientation or acceleration / deceleration of device 800, and temperature changes of device 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 814 may also include an accelerometer, a gyroscope, a magnetometer, a pressure sensor, or a temperature sensor.

[0125] Communication component 816 is configured to facilitate wired or wireless communication between device 800 and other devices. Device 800 can access wireless networks based on communication standards, such as WiFi, 2G, or 3G, or combinations thereof. In one exemplary embodiment, communication component 816 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 816 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0126] In an exemplary embodiment, the device 800 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the battery heating control method described above.

[0127] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 804 including instructions, which can be executed by a processor 820 of the device 800 to complete the battery heating control method described above. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0128] The aforementioned device can be a standalone electronic device or a part of a standalone electronic device. For example, in one embodiment, the device can be an integrated circuit (IC) or a chip, wherein the integrated circuit can be a single IC or a collection of multiple ICs. The chip can include, but is not limited to, the following types: GPU (Graphics Processing Unit), CPU (Central Processing Unit), FPGA (Field Programmable Gate Array), DSP (Digital Signal Processor), ASIC (Application Specific Integrated Circuit), and SoC (System on Chip). The aforementioned integrated circuit or chip can be used to execute executable instructions (or code) to implement the aforementioned battery heating control method. The executable instructions can be stored in the integrated circuit or chip or obtained from other devices or equipment. For example, the integrated circuit or chip includes a processor, memory, and an interface for communicating with other devices. The executable instructions can be stored in the memory, and when the executable instructions are executed by the processor, the above-mentioned battery heating control method is implemented; or, the integrated circuit or chip can receive the executable instructions through the interface and transmit them to the processor for execution to implement the above-mentioned battery heating control method.

[0129] In another exemplary embodiment, a computer program product is also provided, the computer program product comprising a computer program executable by a programmable device, the computer program having a code portion for performing the battery heating control method described above when executed by the programmable device.

[0130] This disclosure also provides a battery heating system, including: a high-voltage battery, a low-voltage battery, a DC-DC converter coupled between the high-voltage battery and the low-voltage battery, and a controller connected to the DC-DC converter, wherein the controller is configured to perform the battery heating control method described above.

[0131] This disclosure also provides a vehicle including the aforementioned battery heating system.

[0132] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of this disclosure. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0133] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A battery heating control method, characterized in that, The method includes: Acquire first state information of the high-voltage battery and second state information of the low-voltage battery. The first state information includes the battery temperature and SOC value of the high-voltage battery, and the second state information includes the battery temperature and SOC value of the low-voltage battery. Based on the first state information and the second state information, a phase diagram of the current corresponding to the low-voltage battery side or the high-voltage battery side is generated. In response to determining that the battery heating conditions are met based on the first state information and the second state information, the operating state of the DC-DC converter coupled between the high-voltage battery and the low-voltage battery is controlled so that the high-voltage battery and the low-voltage battery alternately charge each other; Controlling the operating state of the DC-DC converter to allow the high-voltage battery and the low-voltage battery to alternately charge each other includes: If the SOC value of the low-voltage battery is greater than the upper limit of the preset SOC value range, the operating state of the DC-DC converter is controlled so that the high-voltage battery and the low-voltage battery alternately charge each other in the following manner: the low-voltage battery charges the high-voltage battery first. The control of the operating state of the DC-DC converter includes: The charging current between the high-voltage battery and the low-voltage battery is controlled according to the phase diagram.

2. The method according to claim 1, characterized in that, When the device containing the high-voltage battery and the low-voltage battery is in a static state, the device is not connected to an external charging device to form an external high-voltage circuit, and the SOC value of the high-voltage battery is greater than the SOC value threshold: If the battery temperature of the high-voltage battery is less than the first temperature threshold and greater than the second temperature threshold, or the battery temperature of the low-voltage battery is less than the third temperature threshold and greater than the fourth temperature threshold, then the battery heating conditions are determined to be met.

3. The method according to claim 1, characterized in that, Controlling the operating state of the DC-DC converter to allow the high-voltage battery and the low-voltage battery to alternately charge each other, further includes: If the SOC value of the low-voltage battery is less than the lower limit of the preset SOC value range, the operating state of the DC-DC converter is controlled so that the high-voltage battery and the low-voltage battery alternately charge each other in the following manner: the high-voltage battery charges the low-voltage battery first.

4. The method according to claim 1, characterized in that, Controlling the operating state of the DC-DC converter to allow the high-voltage battery and the low-voltage battery to alternately charge each other, further includes: If the SOC value of the low-voltage battery is greater than the upper limit of the preset SOC value range, the working state of the DC-DC converter is controlled so that the low-voltage battery charges the high-voltage battery until the SOC value of the low-voltage battery drops to the SOC value range, and then the high-voltage battery and the low-voltage battery alternately charge each other.

5. The method according to claim 1, characterized in that, Controlling the operating state of the DC-DC converter to allow the high-voltage battery and the low-voltage battery to alternately charge each other includes: If the SOC value of the low-voltage battery is less than the lower limit of the preset SOC value range, the working state of the DC-DC converter is controlled so that the high-voltage battery charges the low-voltage battery until the SOC value of the low-voltage battery rises to the SOC value range, and then the high-voltage battery and the low-voltage battery alternately charge each other.

6. The method according to any one of claims 1 to 5, characterized in that, The method further includes: In response to determining that the alternating charging duration has reached a preset duration threshold, the operating state of the DC-DC converter is controlled so that the high-voltage battery and the low-voltage battery stop alternating to charge each other.

7. A battery heating control device, characterized in that, The device includes: The acquisition module is used to acquire first state information of the high-voltage battery and second state information of the low-voltage battery. The first state information includes the battery temperature and SOC value of the high-voltage battery, and the second state information includes the battery temperature and SOC value of the low-voltage battery. The generation module is used to generate a phase diagram of the current corresponding to the low-voltage battery side or the high-voltage battery side based on the first state information and the second state information. The control module is configured to, in response to determining, based on the first state information and the second state information, that the battery heating conditions are met, control the operating state of the DC-DC converter coupled between the high-voltage battery and the low-voltage battery, so that the high-voltage battery and the low-voltage battery alternately charge each other; The control module is used to control the operating state of the DC-DC converter if the SOC value of the low-voltage battery is greater than the upper limit of the preset SOC value range, so that the high-voltage battery and the low-voltage battery alternately charge each other in the following manner: the low-voltage battery charges the high-voltage battery first. The control module is also used to control the charging current between the high-voltage battery and the low-voltage battery according to the phase diagram.

8. A battery heating control device, characterized in that, The device includes: processor; Memory used to store processor-executable instructions; The processor is configured to perform the method of any one of claims 1-6.

9. A computer-readable storage medium having computer program instructions stored thereon, characterized in that, When executed by a processor, the program instructions implement the steps of the method according to any one of claims 1 to 6.

10. A battery heating system, characterized in that, include: A high-voltage battery, a low-voltage battery, a DC-DC converter coupled between the high-voltage battery and the low-voltage battery, and a controller controlled by the DC-DC converter, wherein the controller is configured to perform the method of any one of claims 1-6.

11. A vehicle, characterized in that, Includes the battery heating system as described in claim 10.

12. A chip, characterized in that, It includes a processor and an interface; the processor is used to read instructions to execute the method of any one of claims 1-6.

Images