Battery depolarization method, device, equipment, system, electric equipment, medium and program product

Abstract

The embodiment of the invention provides a battery depolarization method, device, equipment and system, electric equipment, a medium and a program product. The method comprises the following steps: acquiring the voltage of a first battery; under the condition that the voltage of the first battery meets a first depolarization condition or a second depolarization condition, performing depolarization operation on the first battery through an energy storage device; the first depolarization condition comprises that the voltage of the first battery is smaller than or equal to a first depolarization voltage threshold, and the corresponding depolarization operation comprises that the energy storage device is used for charging the first battery; the second depolarization condition comprises that the voltage of the first battery is greater than or equal to a second depolarization voltage threshold, and the corresponding depolarization operation comprises that the energy storage device is used for discharging the first battery. The method can realize depolarization of the battery.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery depolarization method, device, equipment, system, electrical equipment, medium and program product. Background Art

[0002] During the operation of the battery, the lithium ions accumulate at the battery electrodes due to the mismatch between the migration speed of lithium ions and the movement speed of electrons, resulting in polarization.

[0003] When polarization occurs in a battery, the actual voltage of the battery will be lower than the theoretical voltage, and the amount of electricity that the battery can provide will be reduced. For example, when a battery is used as the core power source of an electric vehicle to provide electric energy, the polarization phenomenon will cause the battery output power to be insufficient, and the electric vehicle will not have enough energy to support its high-speed operation, as well as its explosive power and traction, which will affect the normal driving of the electric vehicle. Summary of the invention

[0004] The embodiments of the present application provide a battery depolarization method, device, equipment, system, electrical equipment, medium and program product to achieve a battery depolarization effect.

[0005] In a first aspect, an embodiment of the present application provides a battery depolarization method, comprising:

[0006] obtaining a voltage of a first battery;

[0007] When the voltage of the first battery satisfies a first depolarization condition or a second depolarization condition, performing a depolarization operation on the first battery through an energy storage device;

[0008] The first depolarization condition includes: the voltage of the first battery is less than or equal to a first depolarization voltage threshold, and the corresponding depolarization operation includes: using the energy storage device to charge the first battery; the second depolarization condition includes: the voltage of the first battery is greater than or equal to a second depolarization voltage threshold, and the corresponding depolarization operation includes: using the energy storage device to discharge the first battery.

[0009] In a possible implementation, performing a depolarization operation on the first battery by using an energy storage device includes:

[0010] The energy storage device is controlled to depolarize the first battery using a depolarization current within a depolarization time period.

[0011] In a possible implementation, the method further includes:

[0012] Based on the operating parameters of the first battery, a depolarization parameter of the first battery is determined, where the depolarization parameter includes at least one of the following: a first depolarization voltage threshold, a second depolarization voltage threshold, a depolarization current, and a depolarization duration.

[0013] In a possible implementation manner, determining the depolarization parameter of the first battery based on the operating parameter of the first battery includes:

[0014] Based on the operating parameters of the first battery and a mapping relationship between the operating parameters and the depolarization parameters, the depolarization parameters of the first battery are determined.

[0015] In a possible implementation manner, controlling the energy storage device to depolarize the first battery using a depolarization current within the depolarization time period includes:

[0016] When the voltage of the first battery is less than or equal to a first depolarization voltage threshold, the circuit between the energy storage device and the first battery is turned on until the depolarization duration, and the voltage conversion circuit on the circuit is controlled to convert the output current of the energy storage device into the depolarization current and provide it to the first battery, so as to charge the first battery;

[0017] When the voltage of the first battery is greater than or equal to a second depolarization voltage threshold, the circuit between the energy storage device and the first battery is turned on until the depolarization duration, and the voltage conversion circuit on the circuit is controlled to convert the output current of the first battery into the depolarization current and provide it to the energy storage device to discharge the first battery.

[0018] In a possible implementation manner, the energy storage device is a low-voltage energy storage device, and the method further includes:

[0019] When the power level of the energy storage device is lower than a preset power threshold and the voltage of the first battery meets the pulse discharge requirement, the first battery is controlled to charge the energy storage device.

[0020] In a possible implementation manner, after performing a depolarization operation on the first battery by using an energy storage device, the method further includes:

[0021] Detecting whether the voltage of the first battery meets a depolarization end condition;

[0022] If the voltage of the first battery meets the depolarization end condition, the first battery is controlled to switch to the working condition before depolarization.

[0023] In a possible implementation, the method further includes:

[0024] If the voltage of the first battery does not meet the depolarization end condition, the depolarization operation is performed on the first battery again through the energy storage device until the voltage of the first battery meets the depolarization end condition.

[0025] In a possible implementation manner, the depolarization end condition includes:

[0026] In the case where the energy storage device is used to charge the first battery, the depolarization end condition includes: the voltage of the first battery is greater than or equal to the depolarization end voltage threshold of the first battery;

[0027] When the energy storage device is used to discharge the first battery, the depolarization termination condition includes: the voltage of the first battery is less than or equal to a depolarization termination voltage threshold of the first battery.

[0028] In a possible implementation, the method further includes:

[0029] A depolarization end voltage threshold of the first battery is determined based on the operating parameters of the first battery.

[0030] In a possible implementation manner, the operating parameter of the first battery includes at least one of the following:

[0031] Voltage, current, temperature, SOC.

[0032] In a possible implementation manner, determining the depolarization end voltage threshold based on the operating parameters of the first battery includes:

[0033] Based on the operating parameters of the first battery and the mapping relationship between the operating parameters and the depolarization end voltage threshold, the depolarization end voltage threshold of the first battery is determined.

[0034] In a second aspect, an embodiment of the present application provides a battery depolarization device, comprising:

[0035] An acquisition module, used for acquiring the voltage of the first battery;

[0036] a processing module, configured to perform a depolarization operation on the first battery through an energy storage device when the voltage of the first battery satisfies a first depolarization condition or a second depolarization condition;

[0037] The first depolarization condition includes: the voltage of the first battery is less than or equal to a first depolarization voltage threshold, and the corresponding depolarization operation includes: using the energy storage device to charge the first battery; the second depolarization condition includes: the voltage of the first battery is greater than or equal to a second depolarization voltage threshold, and the corresponding depolarization operation includes: using the energy storage device to discharge the first battery.

[0038] In a third aspect, an embodiment of the present application provides an electronic device, including: a memory, a processor;

[0039] The memory stores computer-executable instructions;

[0040] The processor executes the computer-executable instructions stored in the memory, so that the processor performs the method as described in any one of the first aspects above.

[0041] In a fourth aspect, an embodiment of the present application provides a battery system, the battery system comprising: a control device, a first battery, and an energy storage device; the first battery is connected to the energy storage device;

[0042] The first battery is used to supply power to the load;

[0043] The energy storage device is used to depolarize the first battery.

[0044] The control device is used to execute the method as described in any one of the first aspects above.

[0045] In a possible implementation, the battery system further includes: a voltage conversion circuit;

[0046] The energy storage device is connected to the first battery through the voltage conversion circuit to form a loop;

[0047] The voltage conversion circuit is used to convert the output current of the energy storage device into a depolarization current and provide it to the first battery when the energy storage device charges the first battery; and to convert the output current of the first battery into the depolarization current and provide it to the energy storage device when the energy storage device discharges the first battery.

[0048] In a possible implementation, the energy storage device is a low-voltage energy storage device.

[0049] In a possible implementation manner, the energy storage device includes any one of the following: a second battery, or an energy storage capacitor.

[0050] In a fifth aspect, an embodiment of the present application provides an electrical device, wherein the electrical device comprises the battery system described in any one of the fourth aspects.

[0051] In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the method described in any one of the first aspects above.

[0052] In a seventh aspect, an embodiment of the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the method described in any one of the first aspects above.

[0053] The embodiments of the present application provide a battery depolarization method, device, equipment, system, electrical equipment, medium and program product. When the migration speed of lithium ions does not match the movement speed of electrons, resulting in the accumulation of lithium ions at the battery electrodes, polarization will occur. The present application charges the battery when the battery is discharged, and discharges the battery when the battery is charged, so that more electrons can react chemically with the lithium ions accumulated at the battery electrodes, and the migration speed of lithium ions matches the movement speed of electrons, thereby reducing the accumulation of lithium ions at the battery electrodes, thereby achieving depolarization of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0055] Figure 1 A schematic diagram of a battery system provided in an embodiment of the present application;

[0056] Figure 2 A schematic diagram of another battery system provided in an embodiment of the present application;

[0057] Figure 3 A schematic diagram of a process flow of a battery depolarization method provided in an embodiment of the present application;

[0058] Figure 4 A schematic diagram of a process of a battery depolarization method provided in an embodiment of the present application;

[0059] Figure 5 A schematic diagram of a voltage variation curve of a battery depolarization provided in an embodiment of the present application;

[0060] Figure 6 A schematic diagram of a battery voltage variation curve for depolarization using a method of reducing current;

[0061] Figure 7 A voltage comparison diagram of two depolarization methods provided in an embodiment of the present application;

[0062] Figure 8 A schematic diagram of the structure of a battery depolarization device provided in this application;

[0063] Fig. 9 A structural schematic diagram of an electronic device provided for this application.

[0064] Through the above-mentioned drawings, specific embodiments of this application have been shown, and more detailed descriptions will be given later. These drawings and textual descriptions are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. Specific Embodiments

[0065] Here, exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. On the contrary, they are merely examples of devices and methods consistent with some aspects of this application as detailed in the appended claims.

[0066] In this application, the term "including" and its variants may refer to non-restrictive inclusion; the term "or" and its variants may refer to "and / or". In this application, terms such as "first" and "second" are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. In this application, "a plurality" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0067] As people's attention to environmental protection and low carbon continues to increase, the development pace of new energy vehicles has also significantly accelerated. The automotive industry has seen accelerated integration of technologies related to energy, transportation, information and communication, etc. Electrification, networking, and intelligence have become the development trends and directions in the automotive industry.

[0068] New technologies for new energy vehicles have emerged like bamboo shoots after a spring rain. For example: Application No. CN202410658157.7, Publication No. CN118238797B, Invention Title: New Energy Vehicle Energy Intelligent Management System, Control Method and Related Equipment; Application No. CN202410672579.X, Publication No. CN118597091A, Invention Title: New Energy Vehicle Energy Intelligent Management Method, System and Related Equipment; Application No. CN202010470247.5, Publication No. CN113734146B, Invention Title: Vehicle Driving Mode Selection Method, Device, Equipment and Medium; all describe hybrid technologies mainly based on electricity, which have multiple advantages such as fast, economical, quiet, smooth, and green.

[0069] The application number is CN202211678720.4, the publication number is CN117382629B, and the invention name is vehicle power control method, device, medium, vehicle controller and vehicle; the application number is CN202311164098.X, the publication number is CN116890770B, and the invention name is vehicle control system, method and vehicle; the application number is CN202311170393.6, the publication number is CN117533292B, and the invention name is vehicle control system, control method, controller and vehicle; all describe a new energy power system with four wheel-side motors independently driven as the core, which greatly improves the safety and power of new energy vehicles.

[0070] In the field of new energy vehicles, especially in new energy power systems with motor drive as the core, batteries are the core power source of electric vehicles, and their performance and stability are crucial to the safety and power of the entire vehicle. This advanced power system not only greatly improves the driving performance and handling of new energy vehicles, but also puts higher requirements on the performance of batteries.

[0071] However, as an indispensable and crucial core power source for electric vehicles, batteries will accumulate lithium ions at the battery electrodes during their operation, such as releasing their stored electrical energy at a higher rate in a short period of time, or during the charging process, due to the mismatch between the migration speed of lithium ions and the movement speed of electrons, thereby causing polarization.

[0072] When polarization occurs in a battery, the actual voltage of the battery will be lower than the theoretical voltage. Taking battery discharge as an example, the drop in battery voltage will directly affect the battery's energy output capacity, and the amount of electrical energy that the battery can provide will be reduced. Furthermore, when the battery provides energy for an electric vehicle, due to the reduction in the amount of electrical energy that the battery can provide, the electric vehicle will not have enough energy to support its operation, and will not have enough energy to support its explosive power and traction, which will in turn affect the normal driving of the electric vehicle.

[0073] Therefore, the present application proposes a battery depolarization method, device, equipment, system, electrical equipment, medium and program product. When the battery meets the depolarization conditions, a current opposite to the current current of the battery is passed to allow more electrons to chemically react with the lithium ions accumulated at the battery electrodes, and the migration speed of the lithium ions matches the movement speed of the electrons, thereby achieving depolarization of the battery.

[0074] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0075] Figure 1 A schematic diagram of a battery system provided in an embodiment of the present application. Figure 1 As shown, the battery system includes: a control device, a first battery, and an energy storage device.

[0076] Optionally, the control device may be a device that can implement control in a battery management system (BMS) shared by the first battery and the energy storage device, such as a battery management controller (BMC), or a device that can simultaneously control the first battery and the energy storage device on an electrical device using the battery system, which is not limited in the present application.

[0077] The first battery is used to power the load. For example, the first battery may be a power battery that provides electrical energy to the load of an electrical device. For example, the electrical device may be an electric vehicle. The load of the electric vehicle may be a device or system that performs its function by obtaining the electrical energy of the first battery. For example, the drive system, control system, lighting system, etc. of the electric vehicle may all serve as the load of the first battery, which relies on the electrical energy provided by the first battery to perform its corresponding function. In this scenario, the first battery may also be referred to as the power battery of the electric vehicle, or the power battery pack of the electric vehicle.

[0078] The energy storage device is used to depolarize the first battery. When the first battery is discharged and polarization occurs, the energy storage device can depolarize the first battery by charging the first battery; when the first battery is charged and polarization occurs, the first battery can depolarize the first battery by discharging to the energy storage device.

[0079] Optionally, the energy storage device can be any device that can provide electrical energy. For example, the energy storage device can include one or more of a second battery, or an energy storage capacitor, which is specifically related to the charging and discharging parameters of the first battery, such as any one or more of the charging and discharging voltage, the charging and discharging efficiency, etc. Figure 1 This is a schematic diagram of a battery as an energy storage device.

[0080] The energy storage device may be a specially added device for depolarizing the first battery, or may be another device in the battery system other than the first battery that can depolarize the first battery.

[0081] Taking the electric device as an electric vehicle as an example, when the energy storage device is a second battery, the second battery can be, for example, a storage battery of the electric vehicle, or another battery in the AB dual battery solution in the electric vehicle. That is, the first battery and the second battery constitute the AB dual battery in the electric vehicle.

[0082] The energy storage capacitor may be a supercapacitor, which is not limited in this application.

[0083] Optionally, the voltage of the energy storage device may be the same as the voltage of the first battery, may be higher than the voltage of the first battery, or may be lower than the voltage of the first battery, which is not limited in the present application.

[0084] When the voltage of the energy storage device is lower than the voltage of the first battery, the energy storage device may be, for example, a low-voltage energy storage device. Taking the energy storage device including a second battery as an example, the second battery may be, for example, a low-voltage battery. Exemplarily, the second battery may be any one of a 12V battery, a 24V battery, a 48V battery, etc., which is not limited in this application.

[0085] Optionally, when the charging voltage required by the first battery matches the voltage of the energy storage device, the first battery can be directly connected to the energy storage device to form a loop. When the voltage of the first battery does not match the voltage of the energy storage device, the first battery and the energy storage device can be connected through a voltage conversion circuit to form a loop. The voltage conversion circuit can be, for example, a DC-to-DC Converter (DCDC), which is not limited in this application.

[0086] When the energy storage device charges the first battery, the output current of the energy storage device can be converted into a depolarization current and provided to the first battery through the voltage conversion circuit. When the energy storage device discharges the first battery, the output current of the first battery can be converted into a depolarization current and provided to the energy storage device through the voltage conversion circuit.

[0087] Take the voltage conversion circuit as an example, the DCDC converter. Figure 2 A schematic diagram of another battery system provided in an embodiment of the present application. Figure 2 As shown, the energy storage device is connected to the first battery through a DCDC converter to form a loop.

[0088] The larger the depolarization current of the first battery, the faster the electron movement speed, the more electrons that react chemically with lithium ions per unit time, and the faster the depolarization speed. Therefore, the magnitude of the depolarization current used by the energy storage device when charging the first battery can determine the depolarization effect of the first battery.

[0089] The longer the depolarization time of the first battery is, the more electrons react with the lithium ions, and the better the depolarization effect is. Therefore, the depolarization time used by the energy storage device to charge the first battery can also determine the depolarization effect of the first battery.

[0090] Below Figure 2 Taking the battery system shown as an example, how the control device realizes the depolarization of the battery is explained.

[0091] Figure 3 The flowchart of the battery depolarization method provided in the embodiment of the present application is shown in FIG. Figure 3 As shown, the method includes:

[0092] S101: Obtain the voltage of a first battery.

[0093] Optionally, the voltage of the first battery may be collected by a voltage sampler on the battery, the control device may actively obtain the voltage collected by the voltage sampler, and the voltage sampler may also actively report the collected voltage to the control device.

[0094] S102: When the voltage of the first battery satisfies the first depolarization condition or the second depolarization condition, perform a depolarization operation on the first battery through the energy storage device.

[0095] The first depolarization condition includes: the voltage of the first battery is less than or equal to a first depolarization voltage threshold, and the corresponding depolarization operation includes: charging the first battery using the energy storage device.

[0096] The second depolarization condition includes: the voltage of the first battery is greater than or equal to the second depolarization voltage threshold, and the corresponding depolarization operation includes: discharging the first battery using the energy storage device.

[0097] Optionally, the depolarization operation on the first battery may be performed by using a depolarization current to depolarize the first battery through an energy storage device, or may be performed by using a depolarization current to depolarize the first battery during a depolarization time through the energy storage device, and this application does not limit this.

[0098] Exemplarily, when polarization occurs in the first battery during discharge, the control device can, when the voltage of the first battery is less than or equal to the first depolarization voltage threshold, turn on the circuit between the energy storage device and the first battery to the depolarization duration, and control the voltage conversion circuit on the circuit to convert the output current of the energy storage device into a depolarization current and provide it to the first battery to charge the first battery. More electrons can react chemically with the lithium ions accumulated at the battery electrodes, and the migration speed of the lithium ions matches the movement speed of the electrons, thereby achieving depolarization of the battery.

[0099] Similarly, when polarization occurs in the first battery during charging, the control device can, when the voltage of the first battery is greater than or equal to the second depolarization voltage threshold, turn on the circuit between the energy storage device and the first battery until the depolarization duration has occurred, and control the voltage conversion circuit on the circuit to convert the output current of the first battery into a depolarization current and provide it to the energy storage device, so as to discharge the first battery. More electrons can react chemically with the lithium ions accumulated at the battery electrodes, and the migration speed of the lithium ions matches the movement speed of the electrons, thereby achieving depolarization of the battery.

[0100] The magnitude of the depolarization current and / or the duration of the depolarization can affect the depolarization effect. When the depolarization current is larger, the electron movement speed is faster, the more electrons react chemically with lithium ions per unit time, and the faster the depolarization speed is.

[0101] It should be noted that during the discharge of the first battery, in the scenario where the energy storage device charges the first battery for depolarization, the depolarization current can be called the depolarization current; during the charging of the first battery, in the scenario where the first battery discharges to the energy storage device for depolarization, the depolarization current can be called the discharge current.

[0102] For example, taking the depolarization of the first battery during the discharge process as an example, assuming that the charging voltage of the first battery is 350 V, the charging voltage that the energy storage device can provide to the first battery is 12 V, and the depolarization current is 350 A, it can be calculated by formula (1) that the depolarization current that the energy storage device can provide to the first battery is 12 A.

[0103] 350*12 / 350=12A (1)

[0104] Assuming that the energy storage device can provide a charging voltage of 48 V and a depolarization current of 700 A for the first battery, it can be calculated by formula (2) that the energy storage device can provide a depolarization current of 96 A for the first battery.

[0105] 700*48 / 350=96A (2)

[0106] It can be seen from the above description that when the depolarization current provided by the energy storage device to the first battery is larger, the energy storage device can provide more electrons to the first battery, so that more electrons react with lithium ions, thereby quickly achieving the effect of matching the lithium ion migration speed with the electron movement speed, that is, the depolarization effect is better.

[0107] In addition, when the depolarization time of the first battery is longer, more electrons chemically react with lithium ions, and the depolarization effect is better.

[0108] The first depolarization voltage threshold, the second depolarization voltage threshold, the depolarization current, and the depolarization duration may be referred to as depolarization parameters. These depolarization parameters may be preset, or one or more of the depolarization parameters may be determined based on the operating parameters of the first battery.

[0109] Taking determining the depolarization parameters of the first battery based on the operating parameters of the first battery as an example, the control device may determine the depolarization parameters of the first battery based on the operating parameters of the first battery and a mapping relationship between the operating parameters and the depolarization parameters.

[0110] Optionally, the above-mentioned operating parameters may be parameters that affect the depolarization of the battery, for example, may include any one or more of voltage, current, temperature, battery state of charge (SOC), etc., and this application does not limit this. The mapping relationship between the operating parameters and the depolarization parameters may be in the form of a discrete table or a linear function relationship. Taking the mapping relationship in the form of a discrete table as an example, according to different operating parameters of the first battery, the corresponding depolarization parameters can be determined by looking up the table.

[0111] When the working parameters are different, the depolarization of the battery is different, and accordingly, the current and / or duration used during depolarization will also change. Therefore, based on the working parameters, the method of dynamically determining the depolarization parameters can more accurately depolarize the first battery and improve the depolarization effect.

[0112] Therefore, in some embodiments, the control device may control the depolarization of the first battery by means of a depolarization current and / or a depolarization duration according to the depolarization requirement.

[0113] For example, the energy storage device is controlled to depolarize the first battery using a depolarization current within the depolarization duration. The depolarization duration may be the depolarization duration during which the energy storage device depolarizes the first battery to achieve a depolarization effect, and the depolarization current may be the depolarization current during which the energy storage device depolarizes the first battery to achieve a depolarization effect. The depolarization duration may be, for example, 1 second (Second, s), and the control device controls the energy storage device to complete the depolarization of the first battery within 1 second, thereby improving the efficiency of depolarization.

[0114] During the process of the energy storage device depolarizing the first battery, the first battery may be directly connected to the energy storage device. In this implementation, the depolarization duration may be controlled by changing the conduction duration of the loop between the first battery and the energy storage device.

[0115] In the process of the energy storage device depolarizing the first battery, the first battery can be connected to the energy storage device through a voltage conversion circuit. In this implementation, the depolarization duration can be controlled by changing the conduction duration of the loop between the first battery and the energy storage device, and / or the depolarization current can be changed by controlling the DCDC converter. For example, in a charging scenario, the DCDC converter is controlled to convert the output current of the energy storage device into a depolarization current and provide it to the first battery.

[0116] The following takes the case where the first battery is charged for depolarization by the energy storage device during the discharge process as an example to explain how to control the depolarization current and depolarization duration. It should be noted that the case where the first battery is discharged for depolarization by the energy storage device during the charging process is similar to the case where the first battery is charged for depolarization by the energy storage device during the discharge process, and will not be described in detail here.

[0117] Taking the example of the first battery being connected to the energy storage device through a voltage conversion circuit, the control device controls the conduction loop between the energy storage device and the first battery to the depolarization time, and controls the voltage conversion circuit on the loop to convert the output current of the energy storage device into a depolarization current and provide it to the first battery. Figure 2 For example, taking the first battery as a power battery pack, the control device can control the depolarization time of the K1 and K2 switches inside the first battery to make the loop between the energy storage device and the first battery conductive to the depolarization time, and control the DCDC converter to convert the output current of the energy storage device into a depolarization current and provide it to the first battery.

[0118] Optionally, after the control device performs a depolarization operation on the first battery through the energy storage device, it can detect whether the voltage of the first battery meets the depolarization end condition. If the voltage of the first battery meets the depolarization end condition, the first battery is controlled to switch to the working condition before depolarization.

[0119] For example, when the first battery is depolarized during the charging process, when the voltage of the first battery meets the depolarization termination condition, the control device controls the first battery to switch to the charging condition; when the first battery is depolarized during the charging process, when the voltage of the first battery meets the depolarization termination condition, the control device controls the first battery to switch to the discharging condition.

[0120] After the first battery is depolarized, the embodiment of the present application determines whether the voltage of the first battery meets the depolarization end condition, thereby timely controlling the first battery to switch to the working condition before depolarization, which helps the first battery to quickly recover to the working state.

[0121] Optionally, in the case of using the energy storage device to charge the first battery, the depolarization end condition may be that the voltage of the first battery is greater than or equal to the depolarization end voltage threshold of the first battery. In some embodiments, the depolarization end voltage threshold of the first battery may also be referred to as a pulse discharge threshold. In the case of using the energy storage device to discharge the first battery, the depolarization end condition may be that the voltage of the first battery is less than or equal to the depolarization end voltage threshold of the first battery.

[0122] Optionally, the depolarization end voltage threshold of the first battery can be pre-set by the control device, or it can be determined based on the operating parameters of the first battery. Further, it can also be determined based on the operating parameters after the depolarization of the first battery is completed, and the mapping relationship between the operating parameters and the depolarization end voltage threshold. This application does not limit this.

[0123] Optionally, the operating parameters of the first battery may include any one or more of the voltage, current, temperature, SOC, etc. after the first battery is depolarized, and this application does not limit this. The mapping relationship between the operating parameters and the depolarization end voltage threshold may be in the form of a discrete table or a linear function relationship. Taking the mapping relationship in the form of a discrete table as an example, according to different operating parameters of the first battery, the corresponding depolarization end voltage threshold may be determined by looking up the table.

[0124] Optionally, if the voltage of the first battery does not meet the depolarization end condition, the depolarization operation is performed on the first battery again through the energy storage device until the voltage of the first battery meets the depolarization end condition.

[0125] Exemplarily, if the voltage of the first battery does not meet the depolarization end condition, the above-mentioned control energy storage device is used again to depolarize the first battery within the depolarization time, and the depolarization current is used to depolarize the first battery, and the voltage of the first battery is detected again to see if it meets the depolarization end condition until the voltage of the first battery meets the depolarization end condition.

[0126] In the above method, the first battery can be depolarized by the energy storage device. In some embodiments, when the energy storage device may also have similar polarization problems, the first battery may also depolarize the energy storage device in the above manner. In this implementation, the role of the first battery becomes the energy storage device, and the role of the energy storage device becomes the device that needs to be depolarized.

[0127] In addition, if the energy storage device is a low-voltage energy storage device, when the power of the energy storage device is lower than the preset power threshold and the voltage of the first battery meets the pulse discharge requirement, the first battery can also be controlled to charge the energy storage device. That is, when the first battery has a polarization problem, the energy storage device can depolarize the first battery. When the first battery has no polarization problem, the energy storage device can be charged.

[0128] The pulse discharge requirement may be that the voltage amplitude of the first battery exceeds a certain threshold value to meet the load power supply demand, or that the voltage fluctuation range of the first battery is within the range that can meet the load power supply demand, and this application does not limit this. The charging operation may be an operation when the energy storage device is low on power, or a continuous charging operation when the first battery is non-polarized, etc., which is specifically related to the setting of the battery system.

[0129] Optionally, the preset power threshold can be set according to the attribute data of the energy storage device, which is not limited in this application. Consistent with the above, the first battery can be directly connected to the energy storage device, or it can be connected to the energy storage device through a voltage conversion circuit. In this case, the voltage conversion circuit can convert the voltage of the first battery to the charging voltage required by the energy storage device. Taking the example that the first battery can be directly connected to the energy storage device through a loop, when the control device detects that the power of the energy storage device is lower than the preset power threshold and the voltage of the first battery meets the pulse discharge requirements, the first battery is controlled to charge the energy storage device through the loop.

[0130] The first battery in the embodiment of the present application can charge the energy storage device when the pulse discharge requirement is met, thereby improving the utilization rate of energy.

[0131] Taking the electric vehicle as an example, the first battery can be the power battery pack of the electric vehicle, and the energy storage device can be the storage battery of the electric vehicle. The present application can adjust the unidirectional DCDC converter between the power battery pack and the storage battery, which is originally used to provide depolarization current for the storage battery, to a bidirectional DCDC converter, so that the storage battery on the electric vehicle can charge the power battery pack when polarization occurs in the power battery pack, so as to eliminate the polarization problem of the power battery pack. In the above manner, the depolarization of the battery can be achieved with relatively minor changes to the original electric vehicle architecture.

[0132] In this scenario, optionally, the control device can be a device that can implement control in the battery management system BMS shared by the first battery and the energy storage device, such as a BMC, or a BMC in a higher-level BMS that can simultaneously control the BMS of the first battery and the BMS of the energy storage device, or a device on the electric vehicle that can simultaneously control the first battery and the energy storage device, such as a vehicle-mounted terminal, etc. This application does not limit this.

[0133] Figure 4 A schematic diagram of a battery depolarization method provided in an embodiment of the present application. Figure 4 As shown, the method comprises the following steps:

[0134] 1. Obtain operating parameters of the first battery, wherein the operating parameters include one or more of the following: voltage, current, temperature, and SOC.

[0135] 2. Based on the working parameters and the mapping relationship between the working parameters and the depolarization parameters, the depolarization voltage threshold, the depolarization current, and the depolarization time are obtained.

[0136] 3. Determine whether the voltage of the first battery reaches the depolarization voltage threshold based on the voltage of the first battery. When the first battery is discharged, determine whether the voltage of the first battery is less than or equal to the first depolarization voltage threshold; when the first battery is charged, determine whether the voltage of the first battery is greater than or equal to the second depolarization voltage threshold. If so, execute step 4; if not, execute step 1.

[0137] 4. Control the energy storage device to depolarize the first battery using a depolarization current within the depolarization time.

[0138] 5. Obtaining the operating parameters of the first battery after depolarization, wherein the operating parameters include one or more of the following: voltage, current, temperature, and SOC of the first battery after depolarization.

[0139] 6. Based on the operating parameters of the first battery after depolarization and the mapping relationship between the operating parameters and the depolarization end voltage threshold, the depolarization end voltage threshold is obtained.

[0140] 7. Detect whether the voltage of the first battery reaches the depolarization end voltage threshold. If yes, execute step 8; if no, execute step 4.

[0141] 8. End depolarization and control the first battery to switch to the working condition before depolarization.

[0142] Figure 5 A schematic diagram of a voltage variation curve of a battery depolarization provided in an embodiment of the present application. The figure takes the first battery depolarization during the discharge process as an example. The horizontal axis of the curve represents time in seconds, and the vertical axis represents the voltage of the battery in volts (Volt, V). Figure 5 As shown, after the battery is discharged for 5 seconds, the battery is depolarized by charging the first battery for 1 second, and the cycle is repeated 5 times. Figure 5 As shown, the first battery starts to discharge at the 5th second, and the voltage gradually decreases during the discharge process. After 5 seconds of discharge, the control device obtains that the voltage of the first battery is reduced to the first depolarization voltage threshold, that is, the voltage of the first battery is reduced to the first depolarization voltage threshold at the 10th second. At this time, that is, at the 10th second, the control device controls the charging of the first battery to depolarize the first battery. In the process of charging the first battery, the voltage rises rapidly, and the first battery completes depolarization within 1 second, that is, at the 11th second, the battery resumes discharging. At this point, the depolarization operation of the battery is completed.

[0143] When the first battery drops to the threshold again during the subsequent use of the first battery, the battery can continue to be depolarized in this manner. Figure 5 This is a schematic diagram of the voltage change curve taking 5 depolarization operations as an example.

[0144] It should be understood that the voltage change shown after 80 seconds in the figure is a scenario where the battery stops discharging, that is, stops supplying power to the load. In this scenario, the battery will continue the chemical reaction until the battery voltage stabilizes.

[0145] The prior art also has a depolarization scheme, which mainly depolarizes the first battery by reducing the current. If the first battery is polarized during the discharge process, the discharge current of the first battery is reduced; if the first battery is polarized during the charging process, the charging current of the first battery is reduced.

[0146] Taking the polarization phenomenon of the first battery during the discharge process as an example, the solution depolarizes the battery by reducing the output current of the battery to the external load. By reducing the output current of the first battery, the electron movement speed is reduced to match the lithium ion migration speed, thereby achieving the effect of battery depolarization. Figure 6 This is a schematic diagram of the battery voltage change curve when depolarizing by reducing the current. Figure 6 As shown, the battery was depolarized by reducing the current for 10 s after discharging for 5 s, and the cycle was repeated 5 times.

[0147] like Figure 6 As shown, the battery starts to discharge at the 5th second, and the voltage gradually decreases during the discharge process. After 5 seconds of discharge, the voltage drops to the threshold, that is, at the 10th second, the voltage drops to the threshold. The BMS controls the battery to discharge at a small current for 10 seconds for depolarization, that is, at the 10th second, the BMS controls the battery to reduce the current discharge for depolarization. In the process of discharging the battery at a small current, the voltage gradually rises. When the voltage rises to the discharge threshold of the battery, that is, at the 20th second, the depolarization is completed, the small current discharge is stopped, and the large current discharge is resumed, thus completing the depolarization operation of the battery.

[0148] When the battery voltage drops to the threshold again during subsequent use of the battery, the battery can continue to be depolarized in this way. Figure 6 This is a schematic diagram of the voltage change curve taking 5 depolarization operations as an example.

[0149] It should be understood that the voltage change shown after 80 seconds in the figure is a scenario where the battery stops discharging, that is, stops supplying power to the load. In this scenario, the battery will continue the chemical reaction until the battery voltage stabilizes.

[0150] The battery of an electric vehicle is depolarized using existing technology, such as Figure 6 As shown, taking the first depolarization of the first battery as an example, during the process of small current discharge of the battery from 10s to 20s, the battery discharge power decreases, and the electric vehicle cannot obtain sufficient electrical energy to provide normal power output, which will affect the driving smoothness and power of the electric vehicle.

[0151] like Figure 7 As shown, taking the first depolarization of the first battery as an example, the method of the embodiment of the present application only takes 1 second to be applied to the first battery of the electric vehicle, that is, from the 10th to the 11th second. Since the high-power discharge of the first battery is only 1 second apart, compared with the 10s low-current discharge time required in the prior art, the impact on the battery's power supply is small, thereby improving the vehicle's driving smoothness and power.

[0152] Therefore, the present application performs a depolarization operation on the battery by providing a reverse current to the battery through an energy storage device when the battery meets the depolarization conditions. Compared with the method of reducing the battery discharge current depolarization in the prior art, the present application can reduce the battery depolarization time and achieve the effect of rapid battery depolarization. In addition, when the battery provides electric energy for electric vehicles and polarization occurs, the present application can quickly achieve battery depolarization, thereby quickly increasing the battery voltage, increasing the battery power output, and thereby improving the vehicle's driving smoothness and power.

[0153] In order to more intuitively show that the depolarization effect of the present application is better than that of the prior art, Figure 7 The voltage comparison diagram of the two depolarization methods provided in the embodiment of the present application. Figure 7 As shown, taking the fifth depolarization as an example, after the first battery is discharged at the same power for the same time, the voltage value should be the same, and Figure 7 As shown in , the voltage of the first battery after depolarization using the present application is higher than the voltage after depolarization using the prior art. The difference between the two voltages indicates that the depolarization method of the present application is significantly improved compared with the depolarization method of the prior art.

[0154] In summary, compared with the method of reducing the output current of the battery for depolarization in the prior art, the method of the present application can achieve a faster depolarization and a better depolarization effect.

[0155] Furthermore, when the battery depolarization method is applied to the first battery on the electric vehicle, the depolarization time of the first battery can be shortened, the depolarization effect can be improved, and the power of the electric vehicle can be improved. In addition, by setting up the energy storage device, the problem of charging the first battery without an energy source can be solved, and the battery state and the low temperature and low SOC use environment can be combined. Compared with the prior art in which the first battery charges the low-voltage power supply forward, the present application realizes that the low-voltage power supply reversely charges the first battery quickly to achieve the goal of depolarization.

[0156] The above is an embodiment of the method provided by the present application. The following is a description of the device provided by the present application.

[0157] Figure 8A schematic diagram of the structure of a battery depolarization device provided in this application, such as Figure 8 As shown, the battery depolarization device 200 provided in this embodiment may include an acquisition module 201 and a processing module 202 .

[0158] The acquisition module 201 is used to acquire the voltage of the first battery.

[0159] The processing module 202 is configured to perform a depolarization operation on the first battery through an energy storage device when the voltage of the first battery satisfies a first depolarization condition or a second depolarization condition.

[0160] The first depolarization condition includes: the voltage of the first battery is less than or equal to the first depolarization voltage threshold, and the corresponding depolarization operation includes: charging the first battery using the energy storage device. The second depolarization condition includes: the voltage of the first battery is greater than or equal to the second depolarization voltage threshold, and the corresponding depolarization operation includes: discharging the first battery using the energy storage device.

[0161] Optionally, the processing module 202 is specifically configured to control the energy storage device to depolarize the first battery using a depolarization current within a depolarization time period.

[0162] For example, the processing module 202 is further used to determine the depolarization parameters of the first battery based on the working parameters of the first battery, and the depolarization parameters include at least one of the following: a first depolarization voltage threshold, a second depolarization voltage threshold, a depolarization current, and a depolarization duration.

[0163] Exemplarily, the processing module 202 is specifically configured to determine the depolarization parameter of the first battery based on the operating parameter of the first battery and a mapping relationship between the operating parameter and the depolarization parameter.

[0164] In one embodiment, the processing module 202 is specifically used to, when the voltage of the first battery is less than or equal to the first depolarization voltage threshold, conduct the circuit between the energy storage device and the first battery to the depolarization duration, and control the voltage conversion circuit on the circuit to convert the output current of the energy storage device into a depolarization current and provide it to the first battery, so as to charge the first battery. When the voltage of the first battery is greater than or equal to the second depolarization voltage threshold, conduct the circuit between the energy storage device and the first battery to the depolarization duration, and control the voltage conversion circuit on the circuit to convert the output current of the first battery into a depolarization current and provide it to the energy storage device, so as to discharge the first battery.

[0165] Optionally, when the energy storage device is a low-voltage energy storage device, the processing module 202 is further configured to control the first battery to charge the energy storage device when the power of the energy storage device is lower than a preset power threshold and the voltage of the first battery meets the pulse discharge requirement.

[0166] For example, the processing module 202 is used to detect whether the voltage of the first battery meets the depolarization end condition after the energy storage device performs a depolarization operation on the first battery. When the voltage of the first battery meets the depolarization end condition, the first battery is controlled to switch to the working condition before depolarization.

[0167] For example, the processing module 202 is further configured to, when the voltage of the first battery does not satisfy the depolarization end condition, perform a depolarization operation on the first battery again through the energy storage device until the voltage of the first battery satisfies the depolarization end condition.

[0168] Exemplarily, the depolarization end condition includes: when the energy storage device is used to charge the first battery, the depolarization end condition includes: the voltage of the first battery is greater than or equal to the depolarization end voltage threshold of the first battery. When the energy storage device is used to discharge the first battery, the depolarization end condition includes: the voltage of the first battery is less than or equal to the depolarization end voltage threshold of the first battery.

[0169] In one implementation, the processing module 202 may also be used to determine a depolarization end voltage threshold of the first battery based on an operating parameter of the first battery.

[0170] Optionally, the operating parameter of the first battery includes at least one of the following: voltage, current, temperature, and SOC.

[0171] For example, the processing module 202 is specifically configured to determine the depolarization end voltage threshold of the first battery based on the operating parameters of the first battery and the mapping relationship between the operating parameters and the depolarization end voltage threshold.

[0172] The battery depolarization device provided in this embodiment can execute the method provided in any of the above method embodiments, and its implementation principle and technical effect are similar, which will not be described in detail in this embodiment.

[0173] The present application also provides an electrical device, the electrical device comprising the above Figure 1 Battery system corresponding to the embodiment. For example, the electrical equipment may be an electric vehicle equipped with the above-mentioned battery system.

[0174] Fig. 9 This is a schematic diagram of the structure of an electronic device provided in this application. Fig. 9As shown, the electronic device 300 provided in this embodiment includes: at least one processor 301 and a memory 302. Optionally, the device 300 also includes a communication component 303. The processor 301, the memory 302 and the communication component 303 are connected via a bus 304. The electronic device may be, for example, the control device mentioned above. Taking the control device as a control device in a BMS as an example, the electronic device may be, for example, a BMC. Taking the control device as a control device on an electric vehicle as an example, the electronic device may be, for example, a vehicle-mounted terminal.

[0175] In a specific implementation process, at least one processor 301 executes the computer-executable instructions stored in the memory 302, so that at least one processor 301 executes the above method.

[0176] The specific implementation process of the processor 301 can be found in the above method embodiment, and its implementation principle and technical effect are similar, so this embodiment will not be repeated here.

[0177] In the above embodiments, it should be understood that the processor can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. A general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the invention can be directly implemented as a hardware processor, or can be implemented by a combination of hardware and software modules in the processor.

[0178] The memory may include a high-speed memory (Random Access Memory, RAM), and may also include a non-volatile memory (NVM), such as at least one disk storage.

[0179] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the bus in the drawings of this application is not limited to only one bus or one type of bus.

[0180] The present application also provides a computer program product, including a computer program, which implements the above method when executed by a processor.

[0181] The present application also provides a computer-readable storage medium, in which computer-executable instructions are stored. When a processor executes the computer-executable instructions, the above method is implemented.

[0182] The above-mentioned readable storage medium 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. The readable storage medium can be any available medium that can be accessed by a general or special-purpose computer.

[0183] An exemplary readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (Application Specific Integrated Circuits, referred to as: ASIC). Of course, the processor and the readable storage medium can also exist in the device as discrete components.

[0184] The division of units is only a logical function division, and there may be other divisions in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other forms.

[0185] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0186] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0187] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0188] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0189] Finally, it should be noted that those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art not disclosed by the present invention, are not limited to the precise structure described above and shown in the drawings, and may be modified and changed in various ways without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A battery depolarization method, characterized in that: include: obtaining a voltage of a first battery; When the voltage of the first battery satisfies a first depolarization condition or a second depolarization condition, performing a depolarization operation on the first battery through an energy storage device; The first depolarization condition includes: the voltage of the first battery is less than or equal to a first depolarization voltage threshold, and the corresponding depolarization operation includes: using the energy storage device to charge the first battery; the second depolarization condition includes: the voltage of the first battery is greater than or equal to a second depolarization voltage threshold, and the corresponding depolarization operation includes: using the energy storage device to discharge the first battery.

2. The method according to claim 1, characterized in that The performing a depolarization operation on the first battery by using an energy storage device comprises: The energy storage device is controlled to depolarize the first battery using a depolarization current within a depolarization time period.

3. The method according to claim 2, characterized in that The method further comprises: Based on the operating parameters of the first battery, a depolarization parameter of the first battery is determined, where the depolarization parameter includes at least one of the following: a first depolarization voltage threshold, a second depolarization voltage threshold, a depolarization current, and a depolarization duration.

4. The method according to claim 3, characterized in that The determining the depolarization parameter of the first battery based on the operating parameter of the first battery includes: Based on the operating parameters of the first battery and a mapping relationship between the operating parameters and the depolarization parameters, the depolarization parameters of the first battery are determined.

5. The method according to claim 2, characterized in that: The step of controlling the energy storage device to depolarize the first battery using a depolarization current within the depolarization time period includes: When the voltage of the first battery is less than or equal to a first depolarization voltage threshold, the circuit between the energy storage device and the first battery is turned on until the depolarization duration, and the voltage conversion circuit on the circuit is controlled to convert the output current of the energy storage device into the depolarization current and provide it to the first battery, so as to charge the first battery; When the voltage of the first battery is greater than or equal to a second depolarization voltage threshold, the circuit between the energy storage device and the first battery is turned on until the depolarization duration, and the voltage conversion circuit on the circuit is controlled to convert the output current of the first battery into the depolarization current and provide it to the energy storage device to discharge the first battery.

6. The method according to claim 1, characterized in that The energy storage device is a low-voltage energy storage device, and the method further comprises: When the power level of the energy storage device is lower than a preset power threshold and the voltage of the first battery meets the pulse discharge requirement, the first battery is controlled to charge the energy storage device.

7. The method according to claim 1, characterized in that After performing a depolarization operation on the first battery by the energy storage device, the method further includes: Detecting whether the voltage of the first battery meets a depolarization end condition; If the voltage of the first battery meets the depolarization end condition, the first battery is controlled to switch to the working condition before depolarization.

8. The method according to claim 7, characterized in that The method further comprises: If the voltage of the first battery does not meet the depolarization end condition, the depolarization operation is performed on the first battery again through the energy storage device until the voltage of the first battery meets the depolarization end condition.

9. The method according to claim 7, characterized in that: The depolarization end condition includes: In the case where the energy storage device is used to charge the first battery, the depolarization end condition includes: the voltage of the first battery is greater than or equal to the depolarization end voltage threshold of the first battery; In the case where the energy storage device is used to discharge the first battery, the depolarization termination condition includes: the voltage of the first battery is less than or equal to a depolarization termination voltage threshold of the first battery.

10. The method according to claim 9, characterized in that The method further comprises: A depolarization end voltage threshold of the first battery is determined based on the operating parameters of the first battery.

11. The method according to claim 3 or 10, characterized in that: The operating parameters of the first battery include at least one of the following: Voltage, current, temperature, SOC.

12. The method according to claim 10, characterized in that The step of determining the depolarization end voltage threshold based on the operating parameters of the first battery includes: Based on the operating parameters of the first battery and the mapping relationship between the operating parameters and the depolarization end voltage threshold, the depolarization end voltage threshold of the first battery is determined.

13. A battery depolarization device, characterized in that: include: An acquisition module, used for acquiring the voltage of the first battery; a processing module, configured to perform a depolarization operation on the first battery through an energy storage device when the voltage of the first battery satisfies a first depolarization condition or a second depolarization condition; The first depolarization condition includes: the voltage of the first battery is less than or equal to a first depolarization voltage threshold, and the corresponding depolarization operation includes: using the energy storage device to charge the first battery; the second depolarization condition includes: the voltage of the first battery is greater than or equal to a second depolarization voltage threshold, and the corresponding depolarization operation includes: using the energy storage device to discharge the first battery.

14. An electronic device, characterized in that: include: Memory, processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the processor performs the method according to any one of claims 1 to 12.

15. A battery system, characterized in that: The battery system comprises: a control device, a first battery, and an energy storage device; the first battery is connected to the energy storage device; The first battery is used to supply power to the load; The energy storage device is used to depolarize the first battery; The control device is used to execute the method according to any one of claims 1 to 12.

16. The system according to claim 15, characterized in that The battery system further includes: a voltage conversion circuit; The energy storage device is connected to the first battery through the voltage conversion circuit to form a loop; The voltage conversion circuit is used to convert the output current of the energy storage device into a depolarization current and provide it to the first battery when the energy storage device charges the first battery; and to convert the output current of the first battery into the depolarization current and provide it to the energy storage device when the energy storage device discharges the first battery.

17. The system according to claim 16, characterized in that The energy storage device is a low-voltage energy storage device.

18. The system according to any one of claims 15 to 17, characterized in that: The energy storage device includes any one of the following: A second battery or an energy storage capacitor.

19. An electrical equipment, characterized in that: Comprising a battery system as described in any one of claims 15-18.

20. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 12 when executed by a processor.

21. A computer program product, characterized in that The invention comprises a computer program, which implements the method according to any one of claims 1 to 12 when being executed by a processor.

Images