Battery heating method, device and equipment and storage medium

Abstract

The embodiment of the invention provides a battery heating method, device and equipment and a storage medium, and the method comprises the steps: controlling a vehicle-mounted charger OBC to provide a heating electric signal for a heating assembly if the temperature of a power battery is smaller than a first preset temperature threshold value, so as to enable the heating assembly to heat the power battery; if the signal value of the heating electric signal provided by the OBC for the heating assembly is smaller than the preset value of the heating assembly, the power battery is controlled to provide the heating electric signal for the heating assembly at the same time; in the process that the power battery provides the heating electric signal for the heating assembly, if the signal value of the heating electric signal provided by the OBC is not smaller than the preset value of the heating assembly, the power battery is controlled to stop providing the heating electric signal for the heating assembly. The heating time of the power battery is shortened, so that the charging efficiency of the power battery is improved.

Description

Technical Field

[0001] This application relates to the technical field of electric vehicles, and particularly to a method, device, equipment and storage medium for heating a battery. Background Art

[0002] In recent years, in the context of energy and environmental crises, automotive companies around the world have been vigorously promoting the research and development of new energy vehicles. With the development of electric vehicles, people's demand for the use of electric vehicles in low-temperature environments has gradually increased, and the requirements for the charging performance, endurance performance, driving performance, etc. of electric vehicles in low-temperature environments have also become higher and higher. AC charging is a relatively common charging method for electric vehicles. In low-temperature environments, how to make the battery work in the optimal temperature range to ensure its charging performance has become an issue to be optimized.

[0003] For most electric vehicles, the solution to improving AC charging performance is to use the method of AC charging heating. Generally, in low-temperature environments, the battery is heated and then charged. When using the method of AC charging heating, the on-board charger (OBC) is usually used to connect to AC power externally and convert the AC power into DC power, and the battery is heated and charged through this DC power. However, due to insufficient electrical signal capabilities at the OBC power supply end or insufficient OBC output electrical signal capabilities, as well as the start-up characteristics of heating devices in low-temperature environments, the heating devices may not be able to be started, resulting in the inability to heat the battery, the risk of the battery being unable to be charged, and the reduction of the charging efficiency of the battery in low-temperature environments. Summary of the Invention

[0004] In view of this, this application provides a method, device, equipment and storage medium for heating a battery, which is conducive to solving the problem of low battery charging efficiency in the prior art in low-temperature environments.

[0005] In a first aspect, an embodiment of this application provides a method for heating a battery, including: if the temperature of the power battery is less than a first preset temperature threshold, controlling the on-board charger OBC to provide a heating electrical signal for the heating component, so that the heating component heats the power battery;

[0006] if the signal value of the heating electrical signal provided by the OBC for the heating component is less than the preset value of the heating component, controlling the power battery to simultaneously provide a heating electrical signal for the heating component;

[0007] During the process of the power battery providing a heating electrical signal for the heating component, if the signal value of the heating electrical signal provided by the OBC is not less than the preset value of the heating component, controlling the power battery to stop providing a heating electrical signal for the heating component.

[0008] In a possible implementation of the first aspect, it further includes:

[0009] During the heating process of the heating component, if the temperature of the power battery is not less than the first preset temperature threshold and less than the second preset temperature threshold, control the OBC to provide a heating electrical signal for the heating component and a charging signal for the power battery; the second preset temperature threshold is greater than the first preset temperature threshold.

[0010] In a possible implementation of the first aspect, it further includes:

[0011] During the heating process of the heating component, if the temperature of the power battery is not less than the second preset temperature threshold, control the OBC to stop providing a heating electrical signal for the heating component.

[0012] In a possible implementation of the first aspect, the positive electrode of the power battery is connected to the main positive relay, and the negative electrode of the power battery is connected to the main negative relay. If the signal value of the heating electrical signal provided by the OBC for the heating component is less than the preset value of the heating component, controlling the power battery to provide a heating electrical signal for the heating component at the same time includes:

[0013] If the signal value of the heating electrical signal provided by the OBC for the heating component is less than the preset value of the heating component, close the main positive relay and the main negative relay to make the power battery provide a heating electrical signal for the heating component.

[0014] In a possible implementation of the first aspect, during the process of the power battery providing a heating electrical signal for the heating component, if the signal value of the heating electrical signal provided by the OBC is not less than the preset value of the heating component, controlling the power battery to stop providing a heating electrical signal for the heating component includes:

[0015] During the process of the power battery providing a heating electrical signal for the heating component, if the signal value of the heating electrical signal provided by the OBC is not less than the preset value of the heating component, disconnect the main positive relay and / or the main negative relay to make the power battery stop providing a heating electrical signal for the heating component.

[0016] In a possible implementation of the first aspect, it further includes:

[0017] If the temperature of the power battery is not less than the first preset temperature threshold and less than the second preset temperature threshold, control the OBC to provide a heating electrical signal for the heating component and a charging signal for the power battery; the second preset temperature threshold is greater than the first preset temperature threshold.

[0018] In a possible implementation of the first aspect, it further includes:

[0019] If the temperature of the power battery is not less than the second preset temperature threshold, control the OBC to provide a charging signal for the power battery.

[0020] In a second aspect, an embodiment of the present application provides a heating device for a power battery, including:

[0021] A control unit, configured to control an on-vehicle charger OBC to provide a heating electrical signal for a heating component if the temperature of the power battery is less than a first preset temperature threshold, so that the heating component heats the power battery;

[0022] A processing unit, configured to control the power battery to provide a heating electrical signal for the heating component at the same time if the signal value of the heating electrical signal provided by the OBC for the heating component is less than a preset value of the heating component;

[0023] The processing unit is further configured to control the power battery to stop providing a heating electrical signal for the heating component if the signal value of the heating electrical signal provided by the OBC is not less than the preset value of the heating component during the process that the power battery provides a heating electrical signal for the heating component.

[0024] In a third aspect, an embodiment of the present application provides an electronic device, including a memory for storing computer program instructions and a processor for executing the program instructions. When the computer program instructions are executed by the processor, the electronic device is triggered to execute the method according to any one of the first aspects described above.

[0025] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, where the computer-readable storage medium includes a stored program. When the program runs, the device where the computer-readable storage medium is located is controlled to execute the method according to any one of the first aspects described above.

[0026] When the solution provided in the embodiment of the present application is adopted, if the temperature of the power battery is lower than the first preset temperature threshold, the on-board charger OBC is controlled to provide a heating electrical signal for the heating component so that the heating component heats the power battery; if the signal of the heating electrical signal provided by the OBC for the heating component is less than the preset value of the heating component, the power battery is controlled to simultaneously provide a heating electrical signal for the heating component until the signal value of the heating electrical signal provided by the OBC is not less than the preset value of the heating component, and then the power battery is controlled to stop providing the heating electrical signal for the heating component. In this way, in the embodiment of the present application, in a low-temperature environment, when it is necessary to heat the power battery and the heating electrical signal initially output by the OBC cannot meet the heating electrical signal required by the heating component, the power battery is controlled to enable to provide a heating electrical signal for the heating component. At this time, both the power battery and the OBC provide a heating electrical signal for the heating component, so that the heating component can heat normally. During the heating process of the heating component, when the signal value of the heating electrical signal output by the OBC is not less than the preset value of the heating component, the power battery is controlled to stop providing the heating electrical signal for the heating component, and only the OBC provides a heating electrical signal for the heating component, so that the heating component continues to heat. This can ensure that when it is necessary for the heating component to heat the power battery in a low-temperature environment, even if the signal value of the heating electrical signal initially output by the OBC cannot meet the heating component, the power battery can also provide a heating electrical signal for the heating component, so that the heating component can heat normally, thereby reducing the risk of being unable to charge due to the too low battery temperature in a low-temperature environment. Moreover, in the embodiment of the present application, even if the electrical signal ability of the power supply end of the OBC is insufficient or the electrical signal output ability of the OBC is insufficient, the heating component can heat normally, greatly shortening the time required to raise the temperature of the power battery to the temperature at which it can be charged, thereby improving the charging efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 It is a schematic flowchart of a method for heating a battery provided by an embodiment of the present application;

[0029] Figure 2 It is a schematic diagram of a scenario for heating a battery provided by an embodiment of the present application;

[0030] Figure 3 It is another schematic diagram of a scenario for heating a battery provided by an embodiment of the present application;

[0031] Figure 4Another schematic diagram of the heating scenario of the battery provided by the embodiment of the present application;

[0032] Figure 5 Another schematic diagram of the heating scenario of the battery provided by the embodiment of the present application;

[0033] Figure 6 Another schematic diagram of the flow of the heating method of the battery provided by the embodiment of the present application;

[0034] Figure 7 Another schematic diagram of the flow of the heating method of the battery provided by the embodiment of the present application;

[0035] Figure 8 Another schematic diagram of the flow of the heating method of the battery provided by the embodiment of the present application;

[0036] Figure 9 Another schematic diagram of the structure of the heating device of the battery provided by the embodiment of the present application;

[0037] Figure 10 Another schematic diagram of the structure of the electronic device provided by the embodiment of the present application. Detailed implementation manners

[0038] For a better understanding of the technical solution of the present application, the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0039] It should be clear that the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0040] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms of "a", "the" and "said" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0041] It should be understood that the term " / and" used herein is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, a and / or b can represent: a exists alone, a and b exist simultaneously, and b exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0042] In the related art, for most electric vehicles, the solution to improve the AC charging performance is to adopt the method of AC charging heating. Generally, in a low-temperature environment, the battery is heated and then charged. When adopting the method of AC charging heating, usually an on-board charger (OBC) is used to connect to an AC power point externally, and the alternating current is converted into direct current, and the battery is heated and charged through this direct current. However, due to insufficient electrical signal capabilities at the OBC power supply end or insufficient OBC output electrical signal capabilities in a low-temperature environment, the heating device may not be able to be started, resulting in the inability to heat the battery, and there is a risk that the battery cannot be charged, reducing the charging efficiency of the battery in a low-temperature environment.

[0043] In view of the above problems, the embodiments of the present application provide a method, device, equipment and storage medium for heating a battery. If the temperature of the power battery is less than the first preset temperature threshold, control the on-board charger OBC to provide a heating electrical signal for the heating component, so that the heating component heats the power battery; if the signal value of the heating electrical signal provided by the OBC for the heating component is less than the preset value of the heating component, control the power battery to provide a heating electrical signal for the heating component at the same time, until the signal value of the heating electrical signal provided by the OBC is not less than the preset value of the heating component, then control the power battery to stop providing a heating electrical signal for the heating component. In this way, in the embodiments of the present application, in a low-temperature environment, when it is necessary to heat the power battery and the heating electrical signal initially output by the OBC cannot meet the heating electrical signal required by the heating component, control the power battery to enable to provide a heating electrical signal for the heating component. At this time, the power battery and the OBC provide a heating electrical signal for the heating component at the same time, so that the heating component can be heated normally. During the heating process of the heating component, when the signal value of the heating electrical signal output by the OBC is not less than the preset value of the heating component, control the power battery to stop providing a heating electrical signal for the heating component, and only the OBC provides a heating electrical signal for the heating component, so that the heating component continues to heat. This can ensure that when it is necessary to heat the power battery by the heating component in a low-temperature environment, even if the signal value of the heating electrical signal initially output by the OBC cannot meet the heating component, the power battery can also provide a heating electrical signal for the heating component, so that the heating component can be heated normally, thereby reducing the risk of being unable to charge due to the too low battery temperature in a low-temperature environment. Moreover, in the embodiments of the present application, even if the electrical signal capabilities at the OBC power supply end or the OBC output electrical signal capabilities are insufficient, the heating component can be heated normally, greatly shortening the time required to raise the temperature of the power battery to the temperature at which it can be charged, thereby improving the charging efficiency. The following will be described in detail.

[0044] See Figure 1 , which is a schematic flow chart of a method for heating a battery provided by an embodiment of the present application. As Figure 1 shown, the method includes:

[0045] Step S101: If the temperature of the power battery is less than the first preset temperature threshold, control the OBC to provide a heating electrical signal to the heating component so that the heating component heats the power battery.

[0046] Step S102: If the signal value of the heating electrical signal provided by the OBC to the heating component is less than the preset value of the heating component, control the power battery to simultaneously provide a heating electrical signal to the heating component.

[0047] Step S103: During the process of the power battery providing a heating electrical signal to the heating component, if the signal value of the heating electrical signal provided by the OBC is not less than the preset value of the heating component, control the power battery to stop providing a heating electrical signal to the heating component.

[0048] In the embodiment of the present application, in a low-temperature environment, the electrolyte inside the power battery of an electric vehicle becomes viscous, and the ion transport speed inside the battery slows down, resulting in the aggregation of lithium ions on the surface of the negative electrode, forming lithium dendrites, which can easily cause an internal short circuit in the battery and affect the battery life. Therefore, in order to increase the life of the power battery, when the power battery needs to be charged or started, the temperature of the power battery is detected first. At this time, the temperature of the power battery can be obtained first, and it is detected whether the temperature of the power battery is less than the first preset temperature threshold. If the temperature of the power battery is less than the first preset temperature threshold, it means that the current temperature of the power battery is too low, and there is a risk of lithium deposition in the power battery, and it cannot be directly charged. Therefore, it is necessary to heat the power battery first. The control module of the electric vehicle can control the OBC to provide a heating electrical signal to the heating component so that the heating component can heat the power battery to reduce the aggregation of lithium ions on the surface of the negative electrode. In some embodiments, the control module of the electric vehicle can send a heating request to the OBC, and the OBC can convert the external alternating current into direct current in response to the heating request and provide a heating electrical signal to the heating component. In this way, after receiving the heating electrical signal, the heating component starts to generate heat to heat the power battery.

[0049] In some embodiments, the control module of the electric vehicle can be a battery management system (BMS) that manages the power battery in the electric vehicle. At this time, before the power battery is charged, the BMS obtains the temperature of the power battery, and then compares the temperature of the power battery with the first preset temperature threshold. When the temperature of the power battery is less than the first preset temperature threshold, it means that the current temperature of the power battery is too low, and it is necessary to heat the power battery first to reduce the aggregation of lithium ions on the surface of the negative electrode. At this time, the BMS can send a heating request to the OBC, and the OBC responds to the heating request and provides a heating electrical signal to the heating component so that the heating component heats the power battery based on the heating electrical signal.

[0050] Since the electrical signal capacity of the OBC power supply terminal or the OBC output electrical signal capacity is insufficient and cannot reach the value of the electrical signal required by the heating component, that is, it cannot reach the preset value. That is to say, the signal value of the heating electrical signal initially output by the OBC may not be able to trigger the heating component to heat. When the signal value of the heating electrical signal provided by the OBC for the heating component is less than the preset value of the heating component, the power battery can be controlled to be enabled so that the power battery can simultaneously provide the heating electrical signal for the heating component. In this way, the heating component can not only receive the heating electrical signal provided by the OBC, but also receive the heating electrical signal provided by the power battery. The heating electrical signal received by the heating component increases. At this time, the heating component can generate more heat based on the increased heating electrical signal, and the temperature for heating the power battery rises relatively fast, which can heat the power battery more quickly. During the process of the power battery providing the heating electrical signal for the heating component, if the signal value of the heating electrical signal output by the OBC reaches the preset value of the heating component, it means that the heating electrical signal output by the OBC itself can meet the heating signal required by the heating component. At this time, in order to prevent the phenomenon of low-temperature lithium plating in the power battery, the power battery is controlled to stop providing the heating electrical signal for the heating component. The OBC alone provides the heating signal for the heating component to make the heating component continuously heat the power battery. That is, when it is determined that the heating electrical signal provided by the OBC for the heating component is less than the preset value of the heating component, it means that the heating electrical signal provided by the OBC for the heating component cannot trigger the heating component to heat. At this time, the power battery can be controlled to provide the heating electrical signal for the heating component. In this way, the heating signal received by the heating component comes from the OBC and the power battery, and the heating temperature of the heating component rises relatively fast, so that the power battery can normally enter the heating process. When the heating electrical signal output by the OBC reaches the preset value of the heating component, the OBC can provide the heating electrical signal for the heating component alone, and the heating component remains in the heating state to keep the heating temperature from decreasing. At this time, the power battery is controlled to be turned off and stop providing the heating electrical signal for the heating component.

[0051] In this way, through the embodiments of the present application, the heating efficiency of the power battery can be improved, and further the charging efficiency of the power battery can be improved.

[0052] As a possible implementation manner, the OBC itself can determine whether the signal value of the heating electrical signal it provides to the heating component is less than the preset value of the heating component. At this time, the OBC can obtain the preset value of the heating component, compare the signal value of the heating electrical signal it provides to the heating component with the preset value of the heating component. If the signal value of the heating electrical signal provided by the OBC to the heating component is less than the preset value of the heating component, the OBC can send a power battery heating request message to the control module of the electric vehicle. At this time, after receiving the power battery heating request message, the control module of the electric vehicle can control the power battery to provide the heating electrical signal for the heating component.

[0053] During the process of the power battery providing a heating electrical signal to the heating component, the OBC can detect in real time or periodically whether the heating electrical signal it outputs is not less than the preset value of the heating component. When the OBC detects whether the heating electrical signal it outputs is not less than the preset value of the heating component, it can send a trigger message for the power battery to stop heating to the control module of the electric vehicle. At this time, after receiving the trigger message for the power battery to stop heating, the control module of the electric vehicle can control the power battery to stop providing the heating electrical signal to the heating component.

[0054] In some embodiments, the OBC can obtain the preset value of the heating component from a storage device, or the control module of the electric vehicle, or the heating component. When obtaining the preset value of the heating component from the storage device, the preset value of the heating component needs to be pre-stored in the storage device in advance. When obtaining the preset value of the heating component from the control module of the electric vehicle, the control module of the electric vehicle can obtain the preset value of the heating component in advance. Of course, the control module of the electric vehicle can also obtain the preset value of the heating component from the heating component, or the storage device, or other modules when receiving the message sent by the OBC requesting to obtain the preset value of the heating component, and send the preset value of the heating component to the OBC. Of course, the OBC can also obtain the preset value of the heating component in other ways, and this application does not limit this.

[0055] As a possible implementation, the OBC does not judge whether the signal value of the heating electrical signal it provides to the heating component is less than the preset value of the heating component, but rather it is the control module of the electric vehicle. At this time, the OBC can send the signal value of the heating electrical signal it provides to the heating component to the control module of the electric vehicle. For example, it can be sent to the BMS or VCU (Vehicle Control Unit) of the electric vehicle. At this time, the control module of the battery vehicle can compare the signal value of the heating electrical signal provided by the OBC to the heating component with the preset value of the heating component, so as to judge whether the signal value of the heating electrical signal provided by the OBC to the heating component is less than the preset value of the heating component. If it is judged that the signal value of the heating electrical signal provided by the OBC to the heating component is less than the preset value of the heating component, it can directly control the power battery to provide the heating electrical signal to the heating component.

[0056] During the process of the power battery providing a heating electrical signal to the heating component, the control module of the electric vehicle can obtain in real time or periodically the signal value of the heating electrical signal provided by the OBC to the heating component, and detect whether the signal value of the heating electrical signal provided by the OBC to the heating component is less than the preset value of the heating component. When it is detected that the signal value of the heating electrical signal provided by the OBC to the heating component is not less than the preset value of the heating component, it can control the power battery to stop providing the heating electrical signal to the heating component.

[0057] When the control module of the battery vehicle obtains the preset value of the heating component, it can obtain it from the storage device, the OBC, or the heating component. When obtaining the preset value of the heating component from the storage device, the preset value of the heating component needs to be pre-stored in the storage device. When obtaining the preset value of the heating component from the OBC, the OBC can obtain the preset value of the heating component in advance. Of course, the OBC can also obtain the preset value of the heating component from the heating component, the storage device, or other modules when it receives the message requesting to obtain the preset value of the heating component sent by the control module of the electric vehicle, and then send the preset value of the heating component to the control module of the electric vehicle. Of course, the control module of the electric vehicle can also obtain the preset value of the heating component through other means, and this application does not limit this.

[0058] As a possible implementation, since the OBC can provide a heating electrical signal for the heating component, and the power battery can also provide an electrical signal for the heating component, and when the OBC provides a heating electrical signal for the heating component, the power battery can not provide a heating electrical signal for the heating component. Therefore, the OBC and the power battery are connected in parallel, and the first end of the parallel connection of the OBC and the power battery is electrically connected to the first end of the heating component, and the second end of the parallel connection of the OBC and the power battery is electrically connected to the second end of the heating component, as Figure 2 shown. In this way, if the temperature of the power battery is less than the first preset temperature threshold, the OBC is enabled to provide a heating electrical signal for the heating component, so that the heating component heats the power battery, as Figure 3 shown in (1) of. However, during the process of the OBC providing a heating electrical signal for the heating component, if the signal value of the heating electrical signal provided by the OBC for the heating component is less than the preset value of the heating component, the power battery can be enabled to also provide a heating electrical signal for the heating component, referring to Figure 3 shown in (2) of, until the signal value of the heating electrical signal provided by the OBC for the heating component is gradually not less than the preset value of the heating component, and then the control makes the power battery stop providing a heating electrical signal for the heating component, referring to Figure 3 shown in (1) of. Among them, when the power battery does not provide a heating electrical signal for the heating component, the branch between the power battery and the heating component is in an open state, and at this time, the open symbol is used for identification in the drawings.

[0059] As a possible implementation, in order to better control whether the power battery provides an electrical signal for the heating component, as Figure 4 shown, the positive electrode of the power battery is connected to the main positive relay, and the negative electrode of the power battery is connected to the main negative relay.

[0060] At this time, the above-mentioned situation that if the signal value of the heating electrical signal provided by the OBC for the heating component is less than the preset value of the heating component, and the control makes the power battery provide a heating electrical signal for the heating component at the same time includes:

[0061] If the signal value of the heating electrical signal provided by the OBC for the heating component is less than the preset value of the heating component, close the main positive relay and the main negative relay so that the power battery provides the heating electrical signal for the heating component.

[0062] That is, if the temperature of the power battery is less than the first preset temperature threshold, enable the OBC to provide the heating electrical signal for the heating component so that the heating component heats the power battery. During the process of the OBC providing the heating electrical signal for the heating component, if the signal value of the heating electrical signal provided by the OBC for the heating component is less than the preset value of the heating component, at this time, the main positive relay and the main negative relay can be controlled to close, so that the branch between the power battery and the heating component can be conducted, and the power battery can provide the heating electrical signal for the heating component.

[0063] As a possible implementation manner, during the process of the power battery providing the heating electrical signal for the heating component, if the signal value of the heating electrical signal provided by the OBC is not less than the preset value of the heating component, controlling the power battery to stop providing the heating electrical signal for the heating component includes:

[0064] During the process of the power battery providing the heating electrical signal for the heating component, if the signal value of the heating electrical signal provided by the OBC is not less than the preset value of the heating component, disconnect the main positive relay and / or the main negative relay so that the power battery stops providing the heating electrical signal for the heating component.

[0065] That is, during the process of the power battery providing the heating electrical signal for the heating component, it is possible to detect in real time or periodically whether the signal value of the heating electrical signal provided by the OBC for the heating component is not less than the preset value of the heating component. If it is detected that the signal value of the heating electrical signal provided by the OBC for the heating component is not less than the preset value of the heating component, it means that the heating electrical signal provided by the OBC itself can satisfy the heating requirement of the heating component. At this time, in order to prevent the power battery from lithium plating, which affects the service life of the power battery, it is necessary to make the power battery stop providing the heating electrical signal for the heating component. At this time, the branch between the power battery and the heating component can be in an open state, that is, to achieve the power battery to stop providing the heating electrical signal for the heating component. Based on this, the main positive relay and / or the main negative relay can be disconnected. In this way, after the main positive relay and / or the main negative relay are disconnected, the branch where the power battery and the heating component are located is disconnected, so that the power battery cannot continue to provide the heating electrical signal for the heating component, achieving the purpose of the power battery stopping providing the heating electrical signal for the heating component.

[0066] As a possible implementation manner, such as Figure 5As shown, the positive electrode of the power battery is also connected to a pre-charge relay, and the pre-charge relay is connected in parallel with the main positive relay; before closing the main positive relay and the main negative relay to enable the power battery to provide a heating electrical signal for the heating component when the signal value of the heating electrical signal provided by the OBC for the heating component is less than the preset value of the heating component, the above method further includes:

[0067] If the signal value of the heating electrical signal provided by the OBC for the heating component is less than the preset value of the heating component, close the pre-charge relay and the main negative relay to enable the power battery to provide a pre-charge signal for the heating component.

[0068] At this time, the above-mentioned "if the signal value of the heating electrical signal provided by the OBC for the heating component is less than the preset value of the heating component, close the main positive relay and the main negative relay to enable the power battery to provide a heating electrical signal for the heating component" includes:

[0069] If the signal value of the heating electrical signal provided by the OBC for the heating component is less than the preset value of the heating component, and the time for the power battery to provide the pre-charge signal reaches the preset time threshold, disconnect the pre-charge relay and close the main positive relay to enable the power battery to provide a heating electrical signal for the heating component.

[0070] That is, in order to protect the power battery, a pre-charge relay is usually electrically connected to the positive electrode of the power battery. At this time, the pre-charge relay is connected in parallel with the main positive relay. If the signal value of the heating electrical signal provided by the OBC for the heating component is less than the preset value of the heating component and the power battery needs to provide a heating electrical signal for the heating component, the pre-charge relay and the main negative relay can be closed first, so that the power battery provides a pre-charge signal for the heating component to pre-charge the heating component. When the time for the power battery to provide the pre-charge signal reaches the preset time threshold, disconnect the pre-charge relay and close the main positive relay. At this time, both the main positive relay and the main negative relay are closed, enabling the power battery to provide a heating electrical signal for the heating component.

[0071] As a possible implementation, during the heating process of the heating component, as the heating component continues to heat, the temperature of the power battery also rises. When the temperature of the power battery exceeds the first preset temperature threshold, the power battery can be charged. At this time, as Figure 6 shown, the above method further includes:

[0072] Step S104: During the heating process of the heating component, if the temperature of the power battery is not less than the first preset temperature threshold and less than the second preset temperature threshold, control the OBC to provide a heating electrical signal for the heating component and provide a charging signal for the power battery.

[0073] Wherein, the second preset temperature threshold is greater than the first preset temperature threshold.

[0074] In the embodiment of the present application, the control module of the electric vehicle can detect the temperature of the power battery in real time or periodically. When it is detected that the temperature of the power battery is not less than the first preset temperature threshold and less than the second preset temperature threshold, it indicates that the power battery can be charged. However, since the temperature of the power battery does not exceed the second preset temperature threshold, in order to prevent the power battery from lithium plating, it is necessary to continue heating the power battery through the heating component. At this time, the control module of the electric vehicle can control the OBC to provide a charging signal for the power battery while providing a heating electrical signal for the heating component. That is, the OBC can provide a heating electrical signal for the heating component and a charging signal for the power battery at the same time.

[0075] In some embodiments, when the control module of the electric vehicle detects that the temperature of the power battery is not less than the first preset temperature threshold and less than the second preset temperature threshold, it sends a power battery charging request message to the OBC. At this time, in response to the power battery charging request message, the OBC provides a charging signal for the power battery and continues to provide a heating electrical signal for the heating component.

[0076] As a possible implementation manner, during the heating process of the heating component, as the heating component continues to heat, the temperature of the power battery continues to rise accordingly. When the temperature of the power battery exceeds the second preset temperature threshold, it indicates that the temperature of the power battery is normal, and only the power battery can be charged without heating the power battery. At this time, as Figure 7 shown, the above method further includes:

[0077] Step S105: During the heating process of the heating component, if the temperature of the power battery is not less than the second preset temperature threshold, control the OBC to stop providing a heating electrical signal for the heating component.

[0078] In the embodiment of the present application, as the heating component continues to heat, the temperature of the power battery keeps rising. When the temperature of the power battery is not less than the second preset temperature threshold, it indicates that the temperature of the power battery can be normally charged and lithium plating will not occur. At this time, the control module of the electric vehicle can control the OBC to stop providing a heating electrical signal for the heating component, so that the heating component stops heating. The OBC will continue to provide a charging signal for the power battery to continue charging the power battery. In some embodiments, the control module of the power battery can send a stop heating request message to the OBC. At this time, in response to the stop heating request message, the OBC stops providing a heating electrical signal for the heating component, and the heating component no longer continues to heat.

[0079] As a possible implementation manner, it is necessary to detect the temperature of the power battery before charging the power battery. At this time, before the above step S101, it further includes: Step S106: Obtain the temperature of the power battery.

[0080] In the embodiment of the present application, the control module of the electric vehicle can detect the temperature of the power battery and obtain the current temperature of the power battery. Compare the temperature of the power battery with the first preset temperature threshold and the second preset temperature threshold, and detect the relationship between the temperature of the power battery and the first preset temperature threshold and the second preset temperature threshold.

[0081] When the temperature of the power battery is less than the first preset temperature threshold, the above step S101 is executed. At this time, the power battery should be directly heated and the charging process cannot be performed. If it is detected that the temperature of the power battery is not less than the first preset temperature threshold and less than the second preset temperature threshold, it means that the temperature of the power battery is not very low and charging can be performed. However, the temperature of the power battery has not reached the temperature at which lithium plating does not occur, so the power battery still needs to be heated. At this time, the following step S107 can be executed. If it is detected that the temperature of the power battery is not less than the second preset temperature threshold, it means that the temperature of the power battery is normal and lithium plating will not occur during charging, and it can be directly charged. At this time, the following step S108 can be executed. As Figure 8 shown, the above method further includes:

[0082] Step S107: If the temperature of the power battery is not less than the first preset temperature threshold and less than the second preset temperature threshold, control the OBC to provide a heating electrical signal for the heating component and provide a charging signal for the power battery.

[0083] Wherein, the second preset temperature threshold is greater than the first preset temperature threshold.

[0084] That is, in the embodiment of the present application, before charging the power battery, the current temperature of the power battery is first detected. When the current temperature of the power battery is not less than the first preset temperature threshold and less than the second preset temperature threshold, it means that the power battery can be charged. However, since the temperature of the power battery has not reached the second preset temperature threshold, there is a risk of lithium plating, so the power battery still needs to be heated. At this time, the OBC can be controlled to provide both a charging signal for the power battery and a heating electrical signal for the heating component. In this way, the power battery can be charged and the power battery can be heated by the heating component at the same time, so that the temperature of the power battery rises.

[0085] In some embodiments, when the control module of the electric vehicle checks that the temperature of the power battery is not less than the first preset temperature threshold and less than the second preset temperature threshold, it can send a power battery charging request message and a heating request message for the heating component to the OBC. At this time, the OBC responds to the power battery charging request message, converts the alternating current into direct current, and provides a charging signal for the power battery. And in response to the heating request message of the heating component, it can simultaneously provide a heating electrical signal for the heating component. In this way, while the power battery is being charged, the temperature of the power battery can be increased by heating through the heating component.

[0086] It should be noted that the above two request messages can also be combined into one request message and sent to the OBC, or the OBC can be controlled in other forms to provide a heating electrical signal for the heating component and a charging signal for the power battery. The embodiments of the present application do not limit this.

[0087] Step S108: If the temperature of the power battery is not less than the second preset temperature threshold, control the OBC to provide a charging signal for the power battery.

[0088] In the embodiments of the present application, before charging the power battery, the current temperature of the power battery is first detected. When the current temperature of the power battery is not less than the second preset temperature threshold, it indicates that the current temperature of the power battery is normal and it can be directly charged without the phenomenon of lithium plating. At this time, the control module of the electric vehicle can control the OBC to directly charge the power battery.

[0089] In some embodiments, the control module of the electric vehicle can send a power battery charging request message to the OBC. At this time, in response to the power battery charging request message, the OBC can directly charge the power battery. That is, after converting the alternating current into direct current, the OBC provides a charging signal for the power battery.

[0090] See Figure 9 The following shows a schematic structural diagram of a heating device for a power battery provided by an embodiment of the present application. As Figure 9 shown, the device includes:

[0091] A control unit 901, configured to control an on-vehicle charger OBC to provide a heating electrical signal for a heating component if the temperature of the power battery is less than a first preset temperature threshold, so that the heating component heats the power battery.

[0092] A processing unit 902, configured to control the power battery to provide a heating electrical signal for the heating component simultaneously if the signal value of the heating electrical signal provided by the OBC for the heating component is less than the preset value of the heating component;

[0093] The processing unit 902 is further configured to control the power battery to stop providing a heating electrical signal for the heating component if the signal value of the heating electrical signal provided by the OBC is not less than the preset value of the heating component during the process of the power battery providing a heating electrical signal for the heating component.

[0094] As a possible implementation manner, the processing unit 902 is further configured to control the OBC to provide a heating electrical signal for the heating component and a charging signal for the power battery if the temperature of the power battery is not less than the first preset temperature threshold and less than the second preset temperature threshold during the heating process of the heating component. The second preset temperature threshold is greater than the first preset temperature threshold.

[0095] As a possible implementation, the processing unit 902 is further configured to control the OBC to stop providing a heating electrical signal to the heating component when the temperature of the power battery is not less than the second preset temperature threshold during the heating process of the heating component.

[0096] As a possible implementation, the positive electrode of the power battery is connected to the main positive relay, and the negative electrode of the power battery is connected to the main negative relay. Specifically, the processing unit 902 is configured to close the main positive relay and the main negative relay to enable the power battery to provide a heating electrical signal to the heating component if the signal value of the heating electrical signal provided by the OBC to the heating component is less than the preset value of the heating component.

[0097] As a possible implementation, specifically, the processing unit 902 is configured to disconnect the main positive relay and / or the main negative relay during the process of the power battery providing a heating electrical signal to the heating component if the signal value of the heating electrical signal provided by the OBC is not less than the preset value of the heating component, so that the power battery stops providing a heating electrical signal to the heating component.

[0098] As a possible implementation, the control unit 901 is further configured to control the OBC to provide a heating electrical signal to the heating component and provide a charging signal to the power battery if the temperature of the power battery is not less than the first preset temperature threshold and less than the second preset temperature threshold.

[0099] Wherein, the second preset temperature threshold is greater than the first preset temperature threshold.

[0100] As a possible implementation, the control unit 901 is further configured to control the OBC to provide a charging signal to the power battery if the temperature of the power battery is not less than the second preset temperature threshold.

[0101] Corresponding to the above embodiments, the present application further provides an electronic device. Figure 10 It is a schematic structural diagram of an electronic device provided by an embodiment of the present invention. The electronic device 1000 may include: a processor 1001, a memory 1002, and a communication unit 1003. These components communicate through one or more buses. Those skilled in the art can understand that the structure of the electronic device shown in the figure does not constitute a limitation on the embodiments of the present invention. It can be a bus structure, a star structure, and may also include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements.

[0102] Wherein, the communication unit 1003 is configured to establish a communication channel, so that the electronic device can communicate with other devices. Receive user data sent by other devices or send user data to other devices.

[0103] The processor 1001 is the control center of the electronic device, connecting various parts of the entire electronic device through various interfaces and circuits. By running or executing software programs, instructions, and / or modules stored in the memory 1002, and by invoking the data stored in the memory, it executes various functions of the electronic device and / or processes data. The processor may be composed of an integrated circuit (IC). For example, it may be composed of a single packaged IC, or may be composed of multiple packaged ICs with the same or different functions connected together. For example, the processor 1001 may include only a central processing unit (CPU). In the embodiments of the present invention, the CPU may be a single arithmetic core or may include multiple arithmetic cores.

[0104] The memory 1002 is used to store the execution instructions of the processor 1001. The memory 1002 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 memory, flash memory, magnetic disk, or optical disk.

[0105] When the execution instructions in the memory 1002 are executed by the processor 1001, the electronic device 1000 is enabled to execute Figure 1 Some or all of the steps in the illustrated embodiments.

[0106] In a specific implementation, the present invention further provides a computer storage medium. Among them, the computer storage medium can store a program, and when the program is executed, it can include some or all of the steps in the embodiments of the heating method of the power battery provided by the present invention. The storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM), etc.

[0107] In a specific implementation, the present invention further provides a computer program product. Among them, the computer program product contains executable instructions, and when the executable instructions are executed on a computer, the computer is enabled to execute some or all of the steps in the embodiments of the simulation scenario generation method provided by the present invention.

[0108] Those skilled in the art can clearly understand that the technologies in the embodiments of the present invention can be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solutions in the embodiments of the present invention, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to execute the methods described in various embodiments or some parts of the embodiments of the present invention.

[0109] For the same or similar parts among the various embodiments in this specification, reference can be made to each other. In particular, for the device embodiments and the terminal embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and for the relevant parts, reference can be made to the descriptions in the method embodiments.

Claims

1. A method for heating a battery, characterized in that, Including: If the temperature of the power battery is less than the first preset temperature threshold, control the on-board charger OBC to provide a heating electrical signal for the heating component, so that the heating component heats the power battery; If the signal value of the heating electrical signal provided by the OBC for the heating component is less than the preset value of the heating component, control the power battery to simultaneously provide a heating electrical signal for the heating component; During the process of the power battery providing a heating electrical signal for the heating component, if the signal value of the heating electrical signal provided by the OBC is not less than the preset value of the heating component, control the power battery to stop providing a heating electrical signal for the heating component.

2. The method according to claim 1, wherein Also including: During the process of the heating component heating, if the temperature of the power battery is not less than the first preset temperature threshold and less than the second preset temperature threshold, control the OBC to provide a heating electrical signal for the heating component and provide a charging signal for the power battery; the second preset temperature threshold is greater than the first preset temperature threshold.

3. The method according to claim 2, wherein Also including: During the process of the heating component heating, if the temperature of the power battery is not less than the second preset temperature threshold, control the OBC to stop providing a heating electrical signal for the heating component.

4. The method according to any one of claims 1 to 3, characterized in that The positive electrode of the power battery is connected to the main positive relay, and the negative electrode of the power battery is connected to the main negative relay. If the signal value of the heating electrical signal provided by the OBC for the heating component is less than the preset value of the heating component, controlling the power battery to simultaneously provide a heating electrical signal for the heating component includes: If the signal value of the heating electrical signal provided by the OBC for the heating component is less than the preset value of the heating component, close the main positive relay and the main negative relay, so that the power battery provides a heating electrical signal for the heating component.

5. The method according to claim 4, characterized in that, During the process of the power battery providing a heating electrical signal for the heating component, if the signal value of the heating electrical signal provided by the OBC is not less than the preset value of the heating component, controlling the power battery to stop providing a heating electrical signal for the heating component includes: During the process of the power battery providing a heating electrical signal for the heating component, when the signal value of the heating electrical signal provided by the OBC is not less than the preset value of the heating component, disconnect the main positive relay and / or the main negative relay, so that the power battery stops providing a heating electrical signal for the heating component.

6. The method according to claim 1, wherein Also including: If the temperature of the power battery is not less than the first preset temperature threshold and less than the second preset temperature threshold, control the OBC to provide a heating electrical signal for the heating component and provide a charging signal for the power battery; the second preset temperature threshold is greater than the first preset temperature threshold.

7. The method according to claim 1, characterized in that, Also including: If the temperature of the power battery is not less than the second preset temperature threshold, control the OBC to provide a charging signal for the power battery.

8. A heating device for a power battery, characterized in that, Including: A control unit, configured to, if the temperature of the power battery is less than the first preset temperature threshold, control the on-board charger OBC to provide a heating electrical signal for the heating component, so that the heating component heats the power battery; A processing unit, configured to control the power battery to simultaneously provide a heating electrical signal for the heating component if a signal value of the heating electrical signal provided by the OBC for the heating component is less than a preset value of the heating component; The processing unit is further configured to control the power battery to stop providing the heating electrical signal for the heating component if the signal value of the heating electrical signal provided by the OBC is not less than the preset value of the heating component during the process that the power battery provides the heating electrical signal for the heating component.

9. An electronic device, characterized in that, It includes a memory for storing computer program instructions and a processor for executing the program instructions. Wherein, when the computer program instructions are executed by the processor, the electronic device is caused to execute the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein when the program runs, it controls the device where the computer-readable storage medium is located to execute the method according to any one of claims 1 to 7.

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