Charging method and device, electronic equipment, storage medium and program product

Abstract

The invention relates to a charging method and device, electronic equipment, a storage medium and a program product. The method comprises the following steps: under the condition that a battery is charged to a first charge state, heating the battery and continuously charging the battery; under the condition that the battery is charged to a second charge state and the second charge state is a non-cut-off charge state, applying a negative pulse to the battery; wherein the second state of charge is higher than the first state of charge. By adopting the method, the battery capacity and the battery safety can be improved.

Description

Technical Field

[0001] The present application relates to the field of charging technology, and in particular to a charging method, device, electronic device, storage medium and program product. Background Art

[0002] With the development of new energy technologies, batteries have become an indispensable energy storage device in people's lives, and people's demands for battery charging speed and safety are also getting higher and higher.

[0003] At present, in order to increase the charging speed, the charging current is often increased. However, due to the limited charging capacity of the battery, increasing the charging current is prone to metal precipitation. For example, lithium batteries will have the problem of lithium precipitation. Metal precipitation will cause the battery capacity to decrease and affect battery safety. Summary of the invention

[0004] Based on the above problems, the present application provides a charging method, device, electronic device, storage medium and program product, which can improve battery capacity and battery safety.

[0005] In a first aspect, the present application provides a charging method, the method comprising: when the battery is charged to a first state of charge, heating the battery and continuously charging it; when the battery is charged to a second state of charge and the second state of charge is a non-cutoff state of charge, applying a negative pulse to the battery; wherein the second state of charge is higher than the first state of charge.

[0006] In the technical solution of the embodiment of the present application, rapid heating is implemented in a short time before applying a negative pulse to the battery, which can not only improve the battery charging window, but also maximize the reuse of the capacity of the active lithium part in the lithium dendrites, thereby reducing the problem of battery capacity reduction caused by lithium plating, and further improving the safety of the battery.

[0007] In some embodiments, heating the battery includes: heating the battery by self-heating the battery, and / or heating the battery by an external device. In the technical solution of the embodiment of the present application, heating the battery can improve the battery charging window and help the active lithium in the lithium dendrites to be quickly oxidized into lithium ions and enter the electrolyte during the discharge process, thereby reactivating the capacity loss of this part and improving the capacity of the battery.

[0008] In some embodiments, the external device includes a charging device, and the battery is heated by the external device, including: sending a heating request to the charging device; the heating request is used to instruct the charging device to use an oscillation pulse to charge and discharge the battery to heat the battery. In the technical solution of the embodiment of the present application, the battery is heated by the charging device, which can not only improve the battery charging window and battery capacity, but also does not require additional devices, is easy to implement and has low cost.

[0009] In some embodiments, the external device includes a heating device, and the battery is heated by the external device, including: controlling the heating device to start to heat the battery. In the technical solution of the embodiment of the present application, not only can the battery temperature be quickly increased, thereby increasing the battery charging window and battery capacity, but the heating method is simple and easy to implement, and has high safety.

[0010] In some embodiments, the battery is heated by battery self-heating, including: controlling the positive electrode interface of the battery to be electrically connected to the negative electrode interface of the battery to heat the battery. The technical solution of the embodiment of the present application realizes battery self-heating by short-circuiting the positive electrode interface of the battery and the negative electrode interface, which can not only improve the battery charging window and battery capacity, but also does not require additional devices, is easy to implement and has low cost.

[0011] In some embodiments, the method further includes: when the battery is charged to a second state of charge and the second state of charge is a cut-off state of charge, stopping charging the battery. In the technical solution of the embodiment of the present application, stopping charging when the battery is charged to a cut-off state of charge can make the battery power meet the use requirements and improve the safety of the battery.

[0012] In some embodiments, after applying the negative pulse to the battery, the method further includes: finding a target charging current according to the second state of charge; and charging the battery with the target charging current.

[0013] In some embodiments, the method further includes: updating the first state of charge and the second state of charge, and returning to execute the step of heating the battery and continuously charging the battery when the battery is charged to the first state of charge. In the technical solution of the embodiment of the present application, the target charging current to be switched can be quickly determined by searching, thereby increasing the current switching speed and reducing the impact of current switching on charging.

[0014] In a second aspect, the present application further provides a charging device, the device comprising:

[0015] A heating module, used for heating the battery and continuously charging the battery when the battery is charged to a first state of charge;

[0016] The pulse applying module is used to apply a negative pulse to the battery when the battery is charged to a second state of charge and the second state of charge is a non-cut-off state of charge; wherein the second state of charge is higher than the first state of charge.

[0017] In a third aspect, the present application further provides an electronic device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the method described in the first aspect is implemented.

[0018] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the method described in the first aspect is implemented.

[0019] In a fifth aspect, the present application further provides a computer program product, including a computer program, which implements the method described in the first aspect when executed by a processor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the optional embodiments below. The accompanying drawings are only used for the purpose of illustrating the optional embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0021] Figure 1 A flowchart of a charging method according to an embodiment of the present application;

[0022] Figure 2 This is a flowchart of the steps of the charging method of another embodiment of the present application

[0023] Figure 3 This is a structural block diagram of a charging device according to an embodiment of the present application;

[0024] Figure 4 This is a structural block diagram of a charging device according to an embodiment of the present application;

[0025] Figure 5 This is a structural block diagram of a charging device according to an embodiment of the present application;

[0026] Figure 6 This is a structural block diagram of a charging device according to an embodiment of the present application;

[0027] Figure 7 This is a diagram of the internal structure of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0028] The following embodiments of the technical solution of the present application will be described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0030] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0031] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0032] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0033] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0034] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0035] With the development of new energy technologies, batteries have become an indispensable energy storage device in people's lives, and people's demands for battery charging speed and safety are also increasing. At present, in order to increase the charging speed, the charging current is often increased. However, due to the limited charging capacity of the battery, increasing the charging current is prone to metal precipitation. For example, lithium batteries will have the problem of lithium precipitation. Metal precipitation will cause the battery capacity to decrease and affect battery safety.

[0036] In-depth research on the above issues has led to the following findings: 1) After a period of use, the battery pack will age to a certain extent, with an increase in the internal resistance of the battery and a narrowing of the charging window. Increasing the battery temperature can significantly increase the diffusion rate of lithium ions in the negative electrode particles and the migration rate in the electrolyte. Therefore, increasing the battery temperature can increase the battery's charging window. In addition, increasing the battery temperature also helps the active lithium in the lithium dendrites to be quickly oxidized into lithium ions and enter the electrolyte during the discharge process, thereby reactivating the capacity loss and increasing the battery capacity.

[0037] 2) During the charging process, the moment of switching the charging current can be identified as the moment when the risk of lithium deposition is the greatest. Applying a negative pulse to the battery during the charging process can cause the battery to discharge, thereby achieving the effect of lithium cutting at the tip of the lithium dendrite, that is, dynamically repairing the battery that has already undergone lithium deposition.

[0038] According to the above research results, the embodiment of the present application provides a charging method, in which the battery is heated and continuously charged when the battery is charged to the first state of charge; and a negative pulse is applied to the battery when the battery is charged to the second state of charge and the second state of charge is a non-cut-off state of charge. The above method implements rapid heating in a short time before applying a negative pulse to the battery, which can not only improve the battery charging window, but also maximize the reuse of the capacity of the active lithium in the lithium dendrites, thereby reducing the problem of battery capacity reduction caused by lithium plating, and thus improving the safety of the battery.

[0039] The battery disclosed in the embodiment of the present application can be used in, but is not limited to, electrical devices such as vehicles, ships or aircraft. In one application scenario, the battery may include a battery cell and a controller, and the controller is not limited to various battery management systems (Battery Management System, BMS) and battery management units (Battery Management Unit, BMU), and the charging method of the embodiment of the present application is implemented by the control of the BMS or BMU. In another application scenario, the battery can be connected to the controller in the electrical device, for example, the battery is connected to the electronic control unit (Electronic Control Unit, ECU) of the vehicle, and the charging method of the embodiment of the present application is implemented by the control of the controller in the electrical device. It should be noted that the application scenario of the embodiment of the present application is not limited to the above description and can be set according to actual conditions.

[0040] According to some embodiments of the present application, referring to Figure 1 , provides a charging method, which may include the following steps:

[0041] Step 101 : When the battery is charged to a first state of charge, the battery is heated and continuously charged.

[0042] The state of charge (SOC) refers to the ratio of the remaining capacity of a battery after it has been used for a period of time or has been left unused for a long time to its capacity in a fully charged state, usually expressed as a percentage. Its value range is 0% to 100%. When SOC = 0%, it means that the battery is fully discharged, and when SOC = 100%, it means that the battery is fully charged. The first state of charge can be a trigger value for the heating process.

[0043] During the process of charging the battery, it is determined whether the battery has been charged to a first state of charge. If not, charging is continued; if the battery has reached the first state of charge, heating is performed on the battery while charging is continued.

[0044] For example, the first state of charge is SOC=30%. If the battery is charged to SOC=30%, the battery is heated and charging continues.

[0045] In practical applications, the battery can be heated in a variety of ways. For example, a circulating water system provided in the vehicle is used to heat the battery in the vehicle. It should be noted that the heating treatment method is not limited to the above-described method, and other methods can also be used.

[0046] Step 102 : applying a negative pulse to the battery when the battery is charged to a second state of charge and the second state of charge is a non-cut-off state of charge.

[0047] The second state of charge can be set to the trigger value of the negative pulse, and the second state of charge is higher than the first state of charge. The non-cut-off state of charge is a state of charge other than the cut-off state of charge, and the cut-off state of charge is a state of charge that triggers the stop of charging. The second state of charge can be determined in advance according to the switching moment of the charging current. For example, if the state of charge when the charging current is required is SOCx, the second state of charge is set to SOCx.

[0048] During the heating process of the battery, it is determined whether the battery is charged to the second state of charge. If not, the battery continues to be heated and charged; if charged to the second state of charge, a negative pulse is applied to the battery to discharge the battery.

[0049] For example, the second state of charge is SOC=40%. If the battery is charged to SOC=40%, a negative pulse is applied to the battery to discharge the battery.

[0050] In the above embodiment, when the battery is charged to the first state of charge, the battery is heated and continuously charged; when the battery is charged to the second state of charge and the second state of charge is a non-cut-off state of charge, a negative pulse is applied to the battery. In the technical solution of the embodiment of the present application, rapid heating is implemented in a short time before a negative pulse is applied to the battery, which can not only improve the battery charging window, but also maximize the reuse of the capacity of the active lithium in the lithium dendrites, thereby reducing the problem of battery capacity reduction caused by lithium plating, and thus improving the safety of the battery.

[0051] According to some embodiments of the present application, the above-mentioned step of heating the battery may include: heating the battery by self-heating of the battery, and / or heating the battery by an external device.

[0052] When the battery needs to be heated, multiple methods can be used. In one method, when the battery is charged to the first state of charge, the battery is controlled to be short-circuited to generate a large current, and the internal resistance of the battery is used for self-heating to achieve heating of the battery.

[0053] In another embodiment, when the battery is charged to the first state of charge, the external device is controlled to execute a preset strategy to heat the battery, or the external device is controlled to start heating the battery. For example, the charging pile is controlled to execute a preset strategy to heat the battery, or the circulating water system in the vehicle is controlled to heat the battery.

[0054] It is understandable that in practical applications, in order to achieve rapid battery heating, multiple heating methods can be combined to heat the battery. For example, the battery can be short-circuited to heat the battery by self-heating, and at the same time, the circulating water system in the vehicle can be controlled to heat the battery.

[0055] It should be noted that the heating treatment is not limited to the description in the above embodiments, and other heating treatment methods or other combinations of heating treatments may be used, all of which can be set according to actual conditions.

[0056] In the above-mentioned embodiments, the battery is heated by self-heating of the battery, and / or, the battery is heated by an external device. In the technical solution of the embodiment of the present application, heating the battery can improve the battery charging window and help the active lithium in the lithium dendrites to be quickly oxidized into lithium ions and enter the electrolyte during the discharge process, thereby reactivating the capacity loss of this part and improving the capacity of the battery.

[0057] According to some embodiments of the present application, the external device includes a charging device, and the above-mentioned step of heating the battery through the external device may include: sending a heating request to the charging device; wherein the heating request is used to instruct the charging device to use an oscillating pulse to charge and discharge the battery to heat the battery.

[0058] In practical applications, the charging equipment may include a charging pile, a mismatching device, etc. Taking the charging pile as an example, when the battery is charged to the first state of charge, a heating request may be sent to the charging pile. The charging pile receives the heating request and then applies an oscillation pulse to the battery. In the process of applying the oscillation pulse, applying a positive pulse to the battery may charge the battery, and applying a negative pulse to the battery may discharge the battery. Since the battery has internal resistance, applying an oscillation pulse to the battery for charging and discharging the battery may cause the battery to heat up, thereby achieving the effect of heating the battery.

[0059] It should be noted that the amplitude and frequency of the oscillation pulse can be set according to actual conditions.

[0060] In the above embodiment, a heating request is sent to the charging device; the charging device uses an oscillating pulse to charge and discharge the battery to heat the battery. In the technical solution of the embodiment of the present application, the charging device is used to heat the battery, which can not only improve the battery charging window and battery capacity, but also does not require additional devices, is easy to implement and has low cost.

[0061] According to some embodiments of the present application, the external device includes a heating device, and the step of heating the battery through the external device may include: controlling the heating device to start so as to heat the battery.

[0062] A heating device can be set outside the battery, for example, a PTC heating plate can be set outside the battery. The PTC heating plate is composed of a PTC ceramic heating element and an aluminum tube. This type of PTC heating plate has the advantages of low thermal resistance and high heat exchange efficiency. It is an automatic constant temperature and power-saving electric heater. Its outstanding feature is safety performance, which can reduce the risks caused by heating devices.

[0063] When the battery is charged to a first state of charge, the heating device is controlled to start and increase the temperature, thereby performing a heating treatment on the battery.

[0064] In the technical solution of the embodiment of the present application, not only can the battery temperature be quickly increased, thereby improving the battery charging window and battery capacity, but the heating method is also simple and easy to implement and has high safety.

[0065] According to some embodiments of the present application, the above-mentioned step of heating the battery by battery self-heating may include: controlling the positive electrode interface of the battery to be electrically connected to the negative electrode interface of the battery to heat the battery.

[0066] There are many ways to perform heating treatment by battery self-heating. In one of the ways, a connecting line can be set between the positive electrode interface and the negative electrode interface of the battery, and a switch can be set on the connecting line. When the battery self-heating heating method is adopted, the switch is controlled to close and the positive electrode interface of the battery is electrically connected to the negative electrode interface of the battery.

[0067] In another way, inverters can be set at the positive and negative interfaces of the battery respectively. When the battery self-heating method is adopted, the inverter of the positive interface and the inverter of the negative interface are connected to electrically connect the positive interface of the battery with the negative interface of the battery.

[0068] Due to the internal resistance of the battery, after the positive electrode interface of the battery is electrically connected to the negative electrode interface of the battery, a high-frequency oscillating current will be generated in the battery, causing the battery to heat up, thereby achieving the effect of heating the battery.

[0069] In practical applications, the charging frequency and the discharging frequency can be between 0.1Hz and 1Hz, so that the battery's own impedance can be used to the maximum extent to generate heat. Among them, when the frequency is 0.1Hz, the battery's own impedance is mainly manifested as the diffusion impedance of lithium ions in the active material; when the frequency is 1Hz, the battery's own impedance is mainly manifested as the charge transfer impedance. It can be understood that when the frequency is between 0.1Hz and 1Hz, the battery's own impedance can include diffusion impedance and charge transfer impedance. If the frequency is close to 0.1Hz and far away from 1Hz, the diffusion impedance is greater than the charge transfer impedance; if the frequency is close to 1Hz and far away from 0.1Hz, the charge transfer impedance is greater than the diffusion impedance.

[0070] The diffusion impedance is related to the diffusion rate of ions from the inside of the positive electrode particles or the negative electrode particles to the outside of the particles. The charge transfer impedance is related to the transfer rate of charges from the solid phase to the liquid phase.

[0071] In the above embodiment, the positive electrode interface of the battery is controlled to be electrically connected to the negative electrode interface of the battery to heat the battery. The technical solution of the embodiment of the present application realizes self-heating of the battery by short-circuiting the positive electrode interface of the battery with the negative electrode interface, which can not only improve the battery charging window and battery capacity, but also does not require additional devices, is easy to implement and has low cost.

[0072] According to some embodiments of the present application, the embodiments of the present application may further include the following step: when the battery is charged to a second state of charge and the second state of charge is a cut-off state of charge, stopping charging the battery.

[0073] The cut-off state of charge is the state of charge that triggers the charging to stop. For example, the cut-off state of charge includes SOC=100%. In practical applications, the cut-off state of charge is not limited to SOC=100%, and can also be set to other states of charge according to actual conditions, for example, the cut-off state of charge is SOC=90%.

[0074] During the process of heating the battery and continuing to charge, it is determined whether the battery is charged to the second state of charge. If the battery is not charged to the second state of charge, heating and charging are continued. If the battery is charged to the second state of charge and the second state of charge is a cut-off state of charge, charging of the battery is stopped.

[0075] For example, if it is determined that the battery is charged to SOC=100%, charging of the battery is stopped.

[0076] In the above embodiment, when the battery is charged to the second state of charge and the second state of charge is the cut-off state of charge, the battery is stopped from being charged. In the technical solution of the embodiment of the present application, when the battery is charged to the cut-off state of charge, the battery power is stopped, so that the battery power meets the use requirements and the safety of the battery is improved.

[0077] According to some embodiments of the present application, after applying the negative pulse to the battery as described above, the embodiments of the present application may further include: searching for a target charging current according to the second state of charge; and charging the battery with the target charging current.

[0078] The second state of charge can be determined according to the switching moment of the charging current, so when the battery is charged to the second state of charge, the charging current can be switched. For example, before the battery is charged to the second state of charge, the charging current is I1, and after the battery is charged to the second state of charge, the charging current is switched to I2.

[0079] An ammeter storing the corresponding relationship between the state of charge and the charging current may be pre-established, wherein the corresponding relationship between the state of charge and the charging current may be set according to user requirements or determined according to experimental data.

[0080] During the switching process of the charging current, the target charging current corresponding to the second state of charge is searched from the pre-established current table. For example, if the second state of charge is determined to be SOCa, the target charging current corresponding to SOCa is found to be Ia from the current table; if the second state of charge is determined to be SOCb, the target charging current corresponding to SOCb is found to be Ib from the current table.

[0081] After the target charging current corresponding to the second state of charge is found, the battery is charged using the target charging current.

[0082] In the above embodiment, the target charging current is searched according to the second state of charge; and the battery is charged with the target charging current. In the technical solution of the embodiment of the present application, the target charging current to be switched can be quickly determined by searching, thereby increasing the current switching speed and reducing the impact of current switching on charging.

[0083] According to some embodiments of the present application, after charging the battery with the target charging current, the embodiments of the present application may also include: updating the first state of charge and the second state of charge, and returning to execute the steps of heating the battery and continuously charging the battery when the battery is charged to the first state of charge.

[0084] In practical applications, the charging current can be switched once or multiple times during the battery charging process. In the case where the charging current needs to be switched multiple times, different first states of charge and second states of charge can be set for different charging stages. For example, the battery charging is divided into two charging stages. When the state of charge of the battery is less than a preset charge threshold, it is in the first charging stage, and when the state of charge of the battery is greater than or equal to the preset charge threshold, it enters the second charging stage. Alternatively, after a negative pulse is applied to the battery in the first charging stage, the second charging stage is entered. It should be noted that the preset charge threshold can be set according to actual conditions, and the charging stage is not limited to two charging stages.

[0085] In a new charging stage, the first state of charge and the second state of charge are updated, and during the continued charging process, it is determined whether the battery is charged to the updated first state of charge. If the battery is charged to the updated first state of charge, the battery is heated and continuously charged. If the battery is charged to the updated second state of charge, and the updated second state of charge is a non-cut-off state of charge, a negative pulse is applied to the battery, after which the next charging stage can be entered, and the above steps of updating the first state of charge and the second state of charge, as well as the heating treatment and applying the negative pulse are repeated. The battery can also be charged to the cut-off state of charge and then stopped. If the battery is charged to the updated second state of charge, and the updated second state of charge is the cut-off state of charge, the battery is stopped from being charged.

[0086] For example, the first state of charge is SOC=30%, and the second state of charge is SOC=40%. After determining that the battery is charged to SOC=40% and applying a negative pulse to the battery, continue to charge the battery, and update the first state of charge to SOC=80%, and the second state of charge to SOC=90%. If the battery is charged to SOC=80%, the battery is heated and continuously charged. If the battery is charged to SOC=90%, a negative pulse is applied to the battery. Alternatively, when the cut-off state of charge is SOC=90%, if the battery is charged to SOC=90%, stop charging the battery.

[0087] In the above embodiment, the first state of charge and the second state of charge are updated, and the step of heating the battery and continuously charging the battery when the battery is charged to the first state of charge is returned to be executed. In the technical solution of the embodiment of the present application, when it is necessary to switch the charging current multiple times, the battery can be heated multiple times and negative pulses can be applied, thereby improving the charging window and capacity of the battery and dynamically repairing the lithium deposition of the battery.

[0088] According to some embodiments of the present application, referring to Figure 2 , provides a charging method, which may include the following steps:

[0089] Step 201, after connecting to the charging device, look up the initial charging current in a pre-established ammeter, and use the initial charging current to charge the battery.

[0090] Step 202 : When the battery is charged to a first state of charge, the battery is heated and continuously charged.

[0091] Step 203 , applying a negative pulse to the battery when the battery is charged to a second state of charge and the second state of charge is a non-cut-off state of charge; wherein the second state of charge is higher than the first state of charge.

[0092] In some embodiments, the positive electrode interface of the battery is controlled to be electrically connected to the negative electrode interface of the battery so as to heat the battery by self-heating of the battery.

[0093] In some embodiments, the external device includes a charging device, and a heating request is sent to the charging device; the heating request is used to instruct the charging device to use oscillation pulses to charge and discharge the battery to heat the battery.

[0094] In some embodiments, the external device includes a heating device, and the heating device is controlled to start to heat the battery.

[0095] Step 204, searching for a target charging current according to the second state of charge; charging the battery with the target charging current.

[0096] Step 205, updating the first state of charge and the second state of charge, and returning to execute the step of heating the battery and continuously charging the battery when the battery is charged to the first state of charge.

[0097] Step 206 , when the battery is charged to a second state of charge and the second state of charge is a cut-off state of charge, stop charging the battery.

[0098] After you stop charging the battery, you can disconnect the charging device.

[0099] In the technical solution of the embodiment of the present application, rapid heating is implemented in a short time before applying a negative pulse to the battery, which can not only improve the battery charging window, but also maximize the reuse of the capacity of the active lithium part in the lithium dendrites, thereby reducing the problem of battery capacity reduction caused by lithium plating, and further improving the safety of the battery.

[0100] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0101] Based on the same inventive concept, the embodiment of the present application also provides a charging device for implementing the above-mentioned charging method. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above-mentioned method, so the specific limitations in one or more charging device embodiments provided below can refer to the limitations on the charging method above, and will not be repeated here.

[0102] According to some embodiments of the present application, referring to Figure 3 , provides a charging device, the device comprising:

[0103] The heating module 301 is used to heat the battery and continue charging when the battery is charged to a first state of charge;

[0104] The pulse applying module 302 is used to apply a negative pulse to the battery when the battery is charged to a second state of charge and the second state of charge is a non-cut-off state of charge; wherein the second state of charge is higher than the first state of charge.

[0105] In some embodiments, the heating module 301 is specifically used to heat the battery through battery self-heating and / or to heat the battery through an external device.

[0106] In some embodiments, the external device includes a charging device, and the heating module 301 is specifically used to send a heating request to the charging device; the heating request is used to instruct the charging device to use oscillation pulses to charge and discharge the battery to heat the battery.

[0107] In some embodiments, the external device includes a heating device, and the heating module 301 is specifically used to control the start-up of the heating device to heat the battery.

[0108] In some embodiments, the heating module 301 is specifically used to control the electrical connection between the positive electrode interface of the battery and the negative electrode interface of the battery to heat the battery.

[0109] In some embodiments, reference Figure 4 , the device further comprises:

[0110] The stopping module 303 is used to stop charging the battery when the battery is charged to a second state of charge and the second state of charge is a cut-off state of charge.

[0111] In some embodiments, reference Figure 5 , the device further comprises:

[0112] A current search module 304, configured to search for a target charging current according to a second state of charge;

[0113] The charging module 305 is used to charge the battery with a target charging current.

[0114] In some embodiments, reference Figure 6 , the device further comprises:

[0115] The updating module 306 is used to update the first state of charge and the second state of charge, and return to execute the step of heating the battery and continuously charging the battery when the battery is charged to the first state of charge.

[0116] Each module in the above charging device can be implemented in whole or in part by software, hardware or a combination thereof. Each module can be embedded in or independent of a processor in an electronic device in the form of hardware, or can be stored in a memory in an electronic device in the form of software, so that the processor can call and execute operations corresponding to each module.

[0117] According to some embodiments of the present application, an electronic device is provided. The internal structure diagram of the electronic device can be as follows: Figure 7 As shown. The electronic device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. Among them, the processor, the memory and the input / output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. Among them, the processor of the electronic device is used to provide computing and control capabilities. The memory of the electronic device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program, wherein the computer program can be used to implement the above-mentioned functions such as inputting data, performing calculations, and outputting results. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the electronic device is used to exchange information between the processor and the external device. The communication interface of the electronic device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be implemented through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a charging method is implemented.

[0118] Those skilled in the art will understand that Figure 7 The structure shown in the figure is merely a block diagram of a partial structure related to the scheme of the present application, and does not constitute a limitation on the electronic device to which the scheme of the present application is applied. The specific electronic device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0119] According to some embodiments of the present application, there is also provided a non-transitory computer-readable storage medium including instructions, such as a memory including instructions, and the instructions can be executed by a processor of an electronic device to complete the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0120] According to some embodiments of the present application, a computer program product is also provided, and when the computer program is executed by a processor, the above method can be implemented. The computer program product includes one or more computer instructions. When these computer instructions are loaded and executed on a computer, part or all of the above method can be implemented in whole or in part according to the process or function described in the embodiment of the present application.

[0121] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0122] The above-described embodiments only express several implementation methods of the present application, which is convenient for understanding the technical solution of the present application in detail, but it cannot be understood as limiting the scope of protection of the invention patent. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. It should be understood that the technical solutions obtained by those skilled in the art through logical analysis, reasoning or limited experiments on the basis of the technical solutions provided in the present application are all within the protection scope of the attached claims described in the present application. Therefore, the scope of protection of the patent of this application shall be based on the content of the attached claims, and the description and drawings can be used to explain the content of the claims.

Claims

1. A charging method, characterized in that: The method comprises: When the battery is charged to a first state of charge, heating the battery and continuously charging the battery; When the battery is charged to a second state of charge and the second state of charge is a non-cut-off state of charge, a negative pulse is applied to the battery; wherein the second state of charge is higher than the first state of charge.

2. The method according to claim 1, characterized in that The heating treatment of the battery comprises: The battery is heated by battery self-heating and / or the battery is heated by an external device.

3. The method according to claim 2, characterized in that The external device includes a charging device, and the heating process of the battery by the external device includes: A heating request is sent to the charging device; the heating request is used to instruct the charging device to use oscillation pulses to charge and discharge the battery to heat the battery.

4. The method according to claim 2, characterized in that: The external device includes a heating device, and the heating process of the battery by the external device includes: The heating device is controlled to start to heat the battery.

5. The method according to claim 2, characterized in that: The step of heating the battery by self-heating the battery comprises: The positive electrode interface of the battery is controlled to be electrically connected to the negative electrode interface of the battery to heat the battery.

6. The method according to any one of claims 1 to 5, characterized in that: The method further comprises: When the battery is charged to the second state of charge and the second state of charge is a cut-off state of charge, charging of the battery is stopped.

7. The method according to claims 1-5, characterized in that: After applying the negative pulse to the battery, the method further comprises: Finding a target charging current according to the second state of charge; The battery is charged using the target charging current.

8. The method according to claim 7, characterized in that The method further comprises: The first state of charge and the second state of charge are updated, and the process returns to the step of heating the battery and continuously charging the battery when the battery is charged to the first state of charge.

9. A charging device, characterized in that: The device comprises: A heating module, used for heating the battery and continuously charging the battery when the battery is charged to a first state of charge; A pulse applying module is used to apply a negative pulse to the battery when the battery is charged to a second state of charge and the second state of charge is a non-cut-off state of charge; wherein the second state of charge is higher than the first state of charge.

10. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the method according to any one of claims 1 to 8 is implemented.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 8 is implemented.

12. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the method according to any one of claims 1 to 8 is implemented.

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