Charging method, device, equipment and storage medium

Abstract

This application discloses a charging method, apparatus, device, and storage medium. The method includes: detecting the battery temperature of a rechargeable battery in a current environment; determining whether the battery temperature is less than or equal to a first temperature threshold; and, if the battery temperature is less than or equal to the first temperature threshold, pulse charging the rechargeable battery using a pulse charging mode. The solution of this application allows for rapid charging in low-temperature environments without affecting battery life.

Description

Technical Field

[0001] The present application relates to the field of data processing technology, and is related to but not limited to charging methods, devices, equipment and storage media. Background Art

[0002] Because batteries have limited charging performance in low-temperature environments, high-current charging is impossible. For example, the lower the temperature, the slower the migration rate of active materials within the battery. Excessive charging current can easily cause delayed electrochemical reactions and lithium deposition, thus shortening the battery life. Therefore, how to achieve fast charging in low-temperature environments without affecting battery life is an urgent problem.

[0003] Related technologies for charging in low-temperature environments may include: generally, first heating a positive temperature coefficient (PTC) thermistor with a small current, then heating the coolant through the PTC thermistor, gradually increasing the coolant temperature, and then heating the battery through the coolant. After the battery temperature reaches a higher temperature, high-current charging can be started.

[0004] It can be seen that during the above charging process, the battery temperature rises over a long period of time, the waiting time to reach high current charging is long, and the total charging time is long. Summary of the Invention

[0005] The present application provides a charging method, device, equipment, and storage medium, which can quickly complete charging in a low-temperature environment without affecting the battery life.

[0006] The technical solution of this application is achieved as follows:

[0007] The present application provides a charging method, the method comprising:

[0008] Detect the battery temperature of the rechargeable battery in the current environment;

[0009] determining whether the battery temperature is less than or equal to a first temperature threshold;

[0010] When the battery temperature is less than or equal to the first temperature threshold, pulse charging is performed on the rechargeable battery in a pulse charging mode.

[0011] The present application provides a charging device, which includes a detection unit, a judgment unit and a charging unit.

[0012] A detection unit, used to detect the battery temperature of the rechargeable battery in the current environment;

[0013] a determining unit, configured to determine whether the battery temperature is less than or equal to a first temperature threshold;

[0014] The charging unit is configured to perform pulse charging on the rechargeable battery in a pulse charging mode when the battery temperature is less than or equal to the first temperature threshold.

[0015] The present application also provides an electronic device, comprising: a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and the processor implements the above-mentioned charging method when executing the program.

[0016] The present application also provides a storage medium on which a computer program is stored. When the computer program is executed by a processor, the above-mentioned charging method is implemented.

[0017] The charging method, apparatus, device, and storage medium provided in the present application include: detecting the battery temperature of a rechargeable battery in the current environment; determining whether the battery temperature is less than or equal to a first temperature threshold; and, when the battery temperature is less than or equal to the first temperature threshold, pulse charging the rechargeable battery using a pulse charging mode. Regarding the solution of the present application, on the one hand, under high-frequency AC pulses, the negative electrode of the battery cell undergoes lithium insertion and then instantaneously discharges and removes lithium, and the tolerable current amplitude increases with increasing frequency; in this way, the battery life in the pulse charging mode can be guaranteed; on the other hand, the pulse charging time is short, and charging can be completed quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of an optional structure of the charging system provided in an embodiment of the present application;

[0019] Figure 2 An optional flow chart of the charging method provided in the embodiment of the present application

[0020] Figure 3 A schematic diagram of an optional flow chart of a charging method provided in an embodiment of the present application;

[0021] Figure 4 A schematic diagram of an optional flow chart of a charging method provided in an embodiment of the present application;

[0022] Figure 5 A schematic diagram of an optional flow chart of a charging method provided in an embodiment of the present application;

[0023] Figure 6 A schematic diagram of an optional flow chart of a charging method provided in an embodiment of the present application;

[0024] Figure 7 An optional schematic diagram of the relationship between the current amplitude and frequency that a battery can withstand at different temperatures provided in an embodiment of the present application;

[0025] Figure 8 A schematic diagram of an optional structure of a special charging pile provided in an embodiment of the present application;

[0026] Figure 9 An optional flow chart of the charging process provided in an embodiment of the present application;

[0027] Figure 10 A schematic diagram comparing conventional DC charging and pulse charging provided in an embodiment of the present application;

[0028] Figure 11 A schematic diagram of an optional structure of a charging device provided in an embodiment of the present application;

[0029] Figure 12 This is a schematic diagram of an optional structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the specific technical solutions of the application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application but are not intended to limit the scope of the present application.

[0031] In the following description, reference is made to “some embodiments”, which describes a subset of all possible embodiments, but it will be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0032] In the following description, the terms "first, second, and third" are used merely as examples to distinguish between different objects and do not represent a specific order or precedence for the objects. It is understood that the specific order or precedence of "first, second, and third" can be interchanged where permitted, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein are for the purpose of describing the embodiments of this application only and are not intended to limit this application.

[0034] The embodiments of the present application may provide a charging method and apparatus, a device, and a storage medium. In practical applications, the charging method may be implemented by a charging apparatus, and the functional entities in the charging apparatus may be collaboratively implemented by hardware resources of the electronic device, such as computing resources such as a processor, and communication resources (such as those used to support various communication methods such as optical cables and cellular communications).

[0035] The charging method provided in the embodiment of the present application is applied to a charging system, which includes a charging device and a rechargeable battery.

[0036] The charging device is used to charge the rechargeable battery, specifically to perform the following operations: detecting the battery temperature of the rechargeable battery in the current environment; determining whether the battery temperature is less than or equal to a first temperature threshold; and, when the battery temperature is less than or equal to the first temperature threshold, pulse charging the rechargeable battery using a pulse charging mode.

[0037] As an example, the structure of the charging system 10 can be as follows: Figure 1 As shown, it includes: a charging device 101 and a rechargeable battery 102; current can be transmitted between the charging device 101 and the rechargeable battery 102.

[0038] The charging device 101 is used to charge the rechargeable battery 102, specifically to perform the following operations: detecting the battery temperature of the rechargeable battery in the current environment; determining whether the battery temperature is less than or equal to a first temperature threshold; and, when the battery temperature is less than or equal to the first temperature threshold, pulse charging the rechargeable battery using a pulse charging mode.

[0039] The charging device 101 may be a special charging station that supports a pulse charging mode.

[0040] Optionally, the charging device 101 also supports a DC charging mode and can switch between a pulse charging mode and a DC charging mode.

[0041] The rechargeable battery 102 is used to store the current transmitted by the charging device 101 .

[0042] The rechargeable battery 102 may be a battery device with relevant electrical energy storage capabilities. For example, the rechargeable battery 102 may be a lithium battery or the like.

[0043] Next, combine Figure 1 The schematic diagram of the charging system shown illustrates various embodiments of the charging method, device, equipment and storage medium provided in the embodiments of the present application.

[0044] In a first aspect, an embodiment of the present application provides a charging method, which is applied to a charging device; wherein the charging device can be deployed in Figure 1 The charging device 101 in FIG. 8 is shown in FIG.

[0045] Figure 2 The present invention provides a flow chart of an optional charging method, and the charging method provided in the embodiment of the present application is used to charge a rechargeable battery.

[0046] It should be noted that the embodiments of the present application do not limit the specific charging scenarios and can be configured according to actual needs.

[0047] For example, the charging method provided in the embodiments of the present application can be used to charge rechargeable batteries on electric vehicles; it can also be used to charge rechargeable batteries on devices such as electric motorcycles; of course, it can also be used to charge rechargeable batteries on other devices, which are not listed here one by one.

[0048] Specifically, the charging method may include but is not limited to Figure 2 S201 to S203 shown.

[0049] S201: The charging device detects the battery temperature of the rechargeable battery in the current environment.

[0050] In a possible implementation, S201 may be implemented as follows: the charging device directly detects the battery temperature of the rechargeable battery in the current environment through a temperature sensor.

[0051] In another possible implementation, S201 may be implemented as follows: the charging device detects relevant parameters (such as resistance value, etc.) of the thermistor, and calculates the battery temperature of the rechargeable battery in the current environment based on the relevant parameters of the thermistor.

[0052] S202: The charging device determines whether the battery temperature is less than or equal to a first temperature threshold.

[0053] The first temperature threshold refers to a critical value for determining whether the rechargeable battery can be charged with a large DC current (rated current).

[0054] The embodiment of the present application does not impose any specific limitation on the specific value of the first temperature threshold, and can be configured according to actual needs.

[0055] S202 may be implemented as follows: the charging device determines whether the battery temperature of the rechargeable battery in the current environment is less than or equal to a first temperature threshold. Specifically, if the charging device determines that the battery temperature is less than or equal to the first temperature threshold, it indicates that charging can be performed using a high-current DC method; if the charging device determines that the battery temperature is greater than the first temperature threshold, it indicates that charging cannot be performed using a high-current DC method.

[0056] S203: When the battery temperature is less than or equal to the first temperature threshold, the charging device performs pulse charging on the rechargeable battery in a pulse charging mode.

[0057] S203 may be implemented as follows: when the battery temperature is less than or equal to the first temperature threshold, the charging device performs pulse charging on the rechargeable battery in a pulse charging mode. In the pulse charging mode, the charging device performs high-frequency AC pulse charging on the rechargeable battery.

[0058] The embodiment of the present application does not limit the specific charging frequency and charging current in the pulse charging mode, and can be configured according to actual needs.

[0059] The data processing scheme provided by the embodiment of the present application includes: detecting the battery temperature of the rechargeable battery in the current environment; determining whether the battery temperature is less than or equal to a first temperature threshold; and, if the battery temperature is less than or equal to the first temperature threshold, pulse charging the rechargeable battery using a pulse charging mode. With respect to the scheme of the present application, on the one hand, under high-frequency AC pulses, the negative electrode of the battery cell undergoes lithium insertion and then instantaneously discharges and removes lithium, and the tolerable current amplitude increases with increasing frequency; thus, the battery life in the pulse charging mode can be guaranteed; on the other hand, the pulse charging time is short, and charging can be completed quickly.

[0060] Next, the process of pulse charging the rechargeable battery in the pulse charging mode in step S203 when the battery temperature is less than or equal to the first temperature threshold is described.

[0061] Specifically, such as Figure 3 As shown, the charging process of the rechargeable battery may include but is not limited to the following S2031 and S2032.

[0062] S2031. The charging device searches the parameter information for a reference charging parameter corresponding to the battery temperature.

[0063] The parameter information stores multiple sets of reference charging parameters, where each set of reference charging parameters corresponds to a battery temperature.

[0064] The embodiment of the present application does not limit the specific method of storing the reference charging parameters of the parameter information and the number of reference charging parameters, which can be configured according to actual needs.

[0065] For example, the parameter information may store reference charging parameters in the form of a table or a document.

[0066] Reference charging parameters refer to the charging parameters that need to be configured when pulse charging a rechargeable battery using the pulse charging mode.

[0067] The embodiment of the present application does not limit the types of specific charging parameters included in the reference charging parameters, and can be configured according to actual needs.

[0068] In a possible implementation, the reference charging parameters may include: charging rate, charging time, and rest time.

[0069] In another possible implementation, the reference charging parameters may include: charging rate and charging frequency.

[0070] S2031 may be implemented as follows: the charging device searches for a reference charging parameter corresponding to the battery temperature of the rechargeable battery in the current environment among the multiple groups of reference charging parameters included in the parameter information.

[0071] Example 1: Parameter information may be as shown in Table 1 below.

[0072] Table 1 Parameter information example

[0073] R t1(second) t2 (seconds) -20℃ 10 10 10 -15℃ 8 5 10 -10℃ 5 5 15 …… …… …… ……

[0074] In Table 1, R represents the charge rate, t1 represents the charge time, and t2 represents the rest time.

[0075] S2032: The charging device performs pulse charging on the rechargeable battery based on a reference charging parameter corresponding to the battery temperature.

[0076] S2032 may be implemented as follows: the charging device configures charging parameters in a pulse charging mode based on reference charging parameters corresponding to the battery temperature, and then performs pulse charging on the rechargeable battery in the pulse charging mode.

[0077] Next, reference charging parameters are described.

[0078] The reference charging parameters may specifically include but are not limited to the following method A or method B.

[0079] Method A: Reference charging parameters include: charging rate, charging time and rest time.

[0080] Method B: Reference charging parameters include: charging rate and charging frequency.

[0081] In method A, the charge rate is used to limit the size of the charging current in the pulse charging mode.

[0082] For example, if R=5, it means that the charging current is 5 times the battery capacity.

[0083] Charging time is used to limit the charging time within a pulse charging cycle in pulse charging mode.

[0084] The rest time is used to limit the rest time within a pulse charging cycle in the pulse charging mode.

[0085] The rest time is the time when no charging is performed.

[0086] Next, a description will be given of a process in which the charging device performs pulse charging on the rechargeable battery based on the reference charging parameter corresponding to the battery temperature at S2032 .

[0087] Take the reference charging parameters including charging rate, charging time and rest time as an example. Figure 4 As shown, S2032 may include but is not limited to the following S20321 to S20323.

[0088] S20321. The charging device configures the charging current of the pulse charging with reference to the charging rate.

[0089] Exemplarily, S20321 may be implemented as follows: the charging device refers to the charging rate and configures the charging current of the pulse charging to be the product of the charging rate and the battery capacity.

[0090] S20322: The charging device configures a pulse charging cycle for the pulse charging.

[0091] The pulse charging cycle includes: charging time and rest time.

[0092] The charging device configures the charging time parameter of the pulse charging cycle of pulse charging to the charging time; configures the non-charging time (also known as interval time) parameter of the pulse charging cycle of pulse charging to the rest time; a charging time and a rest constitute a pulse charging cycle.

[0093] S20323. The charging device performs pulse charging on the rechargeable battery using the charging current and the pulse charging cycle.

[0094] S20323 may be implemented as: the charging device performs periodic (pulse charging cycle) pulse charging on the rechargeable battery with the charging current.

[0095] The charging method provided in the embodiment of the present application may further include a process of obtaining parameter information. Below, taking the first temperature as an example, the process of obtaining a set of reference charging parameters in the parameter information is described.

[0096] like Figure 5 As shown, the process may include but is not limited to the following S501 to S504.

[0097] S501: When the rechargeable battery is at a first temperature, the charging device detects a first charging rate in a first pulse charging cycle.

[0098] The first pulse charging cycle includes a first charging time and a first rest time.

[0099] The first temperature is any temperature. The embodiment of the present application does not limit the specific value of the first temperature, and can be configured according to actual needs.

[0100] S501 may be implemented as follows: when the rechargeable battery is at a first temperature, the charging device detects a maximum safe charging rate in a first pulse charging cycle as the first charging rate.

[0101] S502: When the rechargeable battery is at the first temperature, the charging device detects a second charging rate in a second pulse charging cycle.

[0102] The second pulse charging cycle includes a second charging time and a second rest time.

[0103] The second pulse charging cycle is different from the first pulse charging cycle. Specifically, the first charging time and the second charging time, and the first resting time and the second resting time cannot be completely the same.

[0104] S502 may be implemented as follows: when the rechargeable battery is at the first temperature, the charging device detects a maximum safe charging rate under the second pulse charging cycle as the second charging rate.

[0105] S503: When the rechargeable battery is at the first temperature, the charging device detects a third charging rate in a third pulse charging cycle.

[0106] The third pulse charging cycle includes a third charging time and a third rest time.

[0107] The third pulse charging cycle is different from the first pulse charging cycle and the second pulse charging cycle. Specifically, the third charging time and the second charging time, and the third resting time and the second resting time cannot be completely the same; and the third charging time and the first charging time, and the third resting time and the first resting time cannot be completely the same.

[0108] S503 may be implemented as follows: when the rechargeable battery is at the first temperature, the charging device detects a maximum safe charging rate under a third pulse charging cycle as the third charging rate.

[0109] S504. If the first value corresponding to the first pulse period is greater than the first value corresponding to the second pulse period, and the first value corresponding to the first pulse period is also greater than the first value corresponding to the third pulse period, the charging device determines the charging parameter under the first pulse period as the reference charging parameter corresponding to the first temperature in the reference information.

[0110] The first value is the product of the charging rate and the charging time ratio.

[0111] The charging time ratio is the ratio of the charging time to the pulse charging period. The pulse charging period is the sum of the charging time and the rest time.

[0112] S504 can be implemented as follows: if the first value corresponding to the first pulse period is the maximum value of the three first values ​​(the first value corresponding to the first pulse period, the first value corresponding to the second pulse period, and the first value corresponding to the third pulse period), the charging device determines the charging parameter under the first pulse period as the reference charging parameter corresponding to the first temperature in the reference information.

[0113] It should be noted that when determining the reference charging parameter corresponding to the first temperature, it can be the maximum value of the first values ​​corresponding to three pulse cycles, or the maximum value of the first values ​​corresponding to more pulse cycles. The embodiment of the present application does not limit the specific number and can be configured according to actual needs.

[0114] like Figure 6 As shown, the charging method provided in the embodiment of the present application may further include the following S204.

[0115] S204: When the battery temperature is greater than the first temperature threshold, the charging device performs DC charging on the rechargeable battery in a DC charging mode.

[0116] S204 may be implemented as follows: when the battery temperature of the current environment of the rechargeable battery is greater than a first temperature threshold, the charging device uses a DC charging mode to perform DC charging on the rechargeable battery. In the DC charging mode, the charging device charges the rechargeable battery with a high DC current (rated current).

[0117] The charging method provided in the embodiment of the present application may further include: re-detecting the battery temperature of the rechargeable battery in the current environment after a first preset time; determining whether the battery temperature is less than or equal to a first temperature threshold; when the battery temperature is less than or equal to the first temperature threshold, pulse charging the rechargeable battery using a pulse charging mode; and when the battery temperature is greater than the first temperature threshold, DC charging the rechargeable battery using a DC charging mode.

[0118] The first preset time is greater than or equal to one pulse charging cycle.

[0119] The embodiment of the present application does not limit the specific value of the first preset time and can be configured according to actual needs.

[0120] Exemplarily, the first preset time may be 10 seconds.

[0121] In this way, the battery temperature of the rechargeable battery can be periodically detected, and then a charging model suitable for the temperature can be adjusted based on the battery temperature, thereby further improving the charging efficiency.

[0122] The following uses an electric vehicle as an example to illustrate the charging method provided in the embodiment of the present application through an embodiment.

[0123] Because the battery's performance is limited in low temperature environments and cannot be charged and discharged with large currents, electric vehicles have the problem of long charging times in winter.

[0124] The relevant technology charging scheme in a low temperature environment is: first discharge the battery with a small current to heat the PTC thermistor, then heat the coolant through the PTC element, gradually increase the temperature of the coolant, and then heat the battery through the coolant. After the battery temperature reaches a higher temperature, start high-current charging.

[0125] It can be seen that during the above charging process, the battery temperature rise time is long, the charging waiting time is long, and the total charging time is long.

[0126] In response to users' desire to shorten charging time, this embodiment of the present application proposes the use of pulsed high-current charging in a low-temperature environment to shorten the low-temperature charging time. The battery temperature is also quickly raised to a suitable working temperature and switched to normal high-current DC charging.

[0127] The solution of this embodiment is described in detail below.

[0128] When a battery is charged at a high rate using direct current (DC), the negative electrode of the cell cannot quickly insert lithium, causing overpolarization and lithium deposition, which leads to capacity degradation and shortened battery life. However, under high-frequency AC pulses, the negative electrode of the cell inserts lithium and then discharges and releases lithium instantly. As a result, the current amplitude (also called the current rate or simply the rate) that the battery can withstand increases with increasing frequency.

[0129] Figure 7 The figure shows the relationship between the current amplitude and frequency that a battery can withstand at different temperatures.

[0130] from Figure 7 It can be seen from the figure that: in high temperature, medium temperature and low temperature environments, the current amplitude (rate) that the battery can withstand increases with the increase of frequency (from low frequency to medium frequency and then to high frequency); and in low temperature environment, the change is more obvious.

[0131] Based on this, this embodiment of the present application proposes a method that can shorten charging in a low-temperature environment. The specific principle may include: based on Q=It, where Q represents the amount of electricity; I represents the current; and t represents the charging time. In a charging cycle S, during the time t1, a high-rate instantaneous charging method R is used, and after standing for a time t2, the next charging cycle is entered. Therefore, the capacity value Q1 obtained by the instantaneous power-on method (also known as the pulse charging method) in one S cycle is greater than the amount of electricity Q2 charged by the low-current charging method during the time t1+t2.

[0132] In this way, the instantaneous power-on method can charge more electricity into the battery per unit time, which is shorter than the conventional DC charging method, and the total time is reduced, shortening the user's waiting time.

[0133] The pulse current only takes the charging current, and the battery cell still needs a certain rest time to complete the embedding of lithium ions. Finding the appropriate ratio of charging and rest time and combining it with the charging rate can obtain the shortest charging time.

[0134] Specifically, it may include but not be limited to the following steps 1 to 3.

[0135] Step 1: Obtain the ratio k of the charge to pulse period (equivalent to the charging time ratio) that can be fully reflected inside the battery cell at different temperatures and frequencies through the battery cell calibration method.

[0136] The value of k can be described by the following formula (1).

[0137] k=t1 / (t1+t2) formula (1);

[0138] In formula (1), t1 represents the charging time, and t2 represents the rest time.

[0139] It can be seen from formula (1) that the k value at different temperatures is obtained, that is, the corresponding t1 and t2 are obtained.

[0140] First, the corresponding safe pulse charging rate R under different periods t1+t2 conditions at a specific temperature is measured, and the maximum value of R×t1 / (t1+t2) is taken as the optimal parameter at that temperature point.

[0141] For example, in a -20°C environment, the corresponding safe pulse charging rate R under different charging cycles t1+t2 can be as shown in Table 2 below.

[0142] Table 2 - Examples of charging rates for different charging cycles at 20°C

[0143]

[0144] Then, the optimal value of R×t1 / (t1+t2) at multiple temperature points is measured to form a MAP table (equivalent to parameter information).

[0145] Table 3 MAP table example

[0146] R t1 t2 -20℃ <![CDATA[R -20 ]]> <![CDATA[t1 -20 ]]> <![CDATA[t2 -20 ]]> -15℃ <![CDATA[R -15 ]]> <![CDATA[t1 -15 ]]> <![CDATA[t2 -15 ]]> -10℃ <![CDATA[R -10 ]]> <![CDATA[t1 -10 ]]> <![CDATA[t2 -10 ]]> …… …… …… ……

[0147] Step 2: Add pulse charging mode to battery charging. Form a MAP table with the data in step 1 and embed it into the battery management system (BMS) software algorithm. Set it to enter pulse charging mode when the battery temperature is lower than the temperature threshold X.

[0148] Step 3: Use special charging piles for charging.

[0149] Compared to conventional charging piles, this charging pile features a new pulse charging mode. In this mode, charging is performed using pulse current (PC). Once a normal battery charging connection is detected, the temperature is determined via the Controller Area Network (CAN) bus to determine which charging mode to enter first.

[0150] like Figure 8 As shown, the special charging pile 80 includes a direct current charging module 801 (Direct Current, DC), a pulse current charging module 802 (Pulse Current, PC), a charging pile controller 803 and a battery 804 of an electric vehicle.

[0151] The inlets of the DC charging module 801 and the pulse charging module 802 are connected to the mains electricity, and the outlets are connected to the battery 804 of the electric vehicle.

[0152] One end of the charging pile controller 803 is connected to the DC charging module 801 and the pulse charging module 802, and the other end is connected to the electric vehicle's battery 804. The charging pile controller 803 is used to determine the temperature via the CAN bus and, based on the determination, control the DC charging module 801 or the pulse charging module 802 to charge the electric vehicle's battery 804.

[0153] The charging process is described below. Figure 9 As shown, the process may include but is not limited to the following S901 to S905.

[0154] S901. The battery charging connection is normal.

[0155] S902: Detect whether the battery temperature is greater than a first temperature threshold.

[0156] If the battery temperature is greater than the first temperature threshold, the following S903 is executed; if the battery temperature is not greater than the first temperature threshold, the following S904 is executed.

[0157] S903. Charge in DC charging mode.

[0158] S904: Charge in pulse charging mode.

[0159] S905 , look up the table to obtain the current optimal pulse charging coefficient, and output the pulse current.

[0160] It should be noted that after the first preset time, S902 is executed again.

[0161] In the low-temperature charging scenario, when the battery temperature is lower than the temperature threshold X, the maximum value of R×t1 / (t1+t2) under the current temperature conditions can be obtained by looking up the table, and the parameter corresponding to the maximum value is used as the optimal coefficient for the current pulse charging, thereby carrying out pulse charging.

[0162] Under certain low-temperature conditions, using a current amplitude of R, with unit charging time t = t1 / (t1+t2), if R×t1 / (t1+t2)>1, the amount of electricity charged per unit time is greater than that charged in the conventional DC time t, and the low-temperature charging stage T' is significantly shorter than the conventional charging method T. This allows for more battery charge, while also increasing heat generation due to increased current, quickly raising the temperature to a more suitable operating temperature, allowing for switching to high-current DC charging, shortening the total charging time.

[0163] Figure 10 A comparison diagram of conventional DC charging and pulse charging is shown.

[0164] in, Figure 10 The middle dashed line represents the current value, RC represents pulse charging, t1 represents the charging time, t2 represents the rest time, and T' represents the total charging time under pulse charging. The total charging time under conventional DC charging is T. It can be seen that T' is less than T, that is, pulse charging takes less time than conventional DC charging.

[0165] In the second aspect, in order to implement the above-mentioned charging method, a charging device according to an embodiment of the present application is provided. Figure 11 The structural diagram of the charging device is shown for explanation.

[0166] like Figure 11 As shown, the charging device 110 includes: a detection unit 1101, a judgment unit 1102 and a charging unit 1103.

[0167] The detection unit 1101 is used to detect the battery temperature of the rechargeable battery in the current environment;

[0168] A determining unit 1102 is configured to determine whether the battery temperature is less than or equal to a first temperature threshold;

[0169] The charging unit 1103 is configured to perform pulse charging on the rechargeable battery in a pulse charging mode when the battery temperature is less than or equal to the first temperature threshold.

[0170] In some embodiments, the charging unit 1103 is specifically configured to:

[0171] Searching for a reference charging parameter corresponding to the battery temperature in the parameter information; wherein the parameter information stores multiple sets of reference charging parameters, wherein one set of the reference charging parameters corresponds to one battery temperature;

[0172] The rechargeable battery is pulse charged based on a reference charging parameter corresponding to the battery temperature.

[0173] In some embodiments,

[0174] The reference charging parameters include:

[0175] A charging rate, which is used to limit the magnitude of the charging current in the pulse charging mode;

[0176] Charging time, which is used to limit the charging duration within a pulse charging cycle in the pulse charging mode;

[0177] The rest time is used to limit the rest time in a pulse charging cycle in the pulse charging mode.

[0178] In some embodiments, when the reference charging parameters include a charging rate, a charging time, and a rest time, the charging unit 1103 is further configured to:

[0179] Referring to the charging rate, configuring the charging current of the pulse charging;

[0180] Configuring a pulse charging cycle for the pulse charging; the pulse charging cycle includes: a charging time and a rest time;

[0181] The rechargeable battery is pulse charged with the charging current and the pulse charging cycle.

[0182] In some embodiments, the charging device 110 further includes a determination unit. The determination unit is configured to:

[0183] When the rechargeable battery is at a first temperature, detecting a first charging rate in a first pulse charging cycle; the first pulse charging cycle includes a first charging time and a first rest time;

[0184] When the rechargeable battery is at the first temperature, detecting a second charging rate in a second pulse charging cycle; the second pulse charging cycle includes a second charging time and a second rest time;

[0185] When the rechargeable battery is at the first temperature, detecting a third charging rate in a third pulse charging cycle; the third pulse charging cycle includes a third charging time and a third rest time;

[0186] If the first value corresponding to the first pulse period is greater than the first value corresponding to the second pulse period, and the first value corresponding to the first pulse period is also greater than the first value corresponding to the third pulse period, then the charging parameter under the first pulse period is determined as the reference charging parameter corresponding to the first temperature in the reference information; wherein, the first value is the product of the charging rate and the charging time ratio; and the charging time ratio is the ratio of the charging time to the pulse charging period.

[0187] In some embodiments, after determining whether the battery temperature is less than or equal to the first temperature threshold, the charging unit 1103 is further configured to:

[0188] When the battery temperature is greater than the first temperature threshold, the rechargeable battery is DC charged in a DC charging mode.

[0189] In some embodiments, after a first preset time, the detection unit 1101 is further used to: re-detect the battery temperature of the rechargeable battery in the current environment; the judgment unit 1102 is further used to: judge whether the battery temperature is less than or equal to a first temperature threshold; the charging unit 1103 is further used to: when the battery temperature is less than or equal to the first temperature threshold, perform pulse charging on the rechargeable battery in a pulse charging mode; when the battery temperature is greater than the first temperature threshold, perform DC charging on the rechargeable battery in a DC charging mode; wherein, the first preset time is greater than or equal to one pulse charging cycle.

[0190] It should be noted that the charging device provided in the embodiment of the present application includes the various units included, which can be implemented by a processor in an electronic device; of course, it can also be implemented by a specific logic circuit; in the implementation process, the processor can be a central processing unit (CPU), a microprocessor (MPU), a digital signal processor (DSP), or a field programmable gate array (FPGA), etc.

[0191] The description of the above device embodiment is similar to the description of the above method embodiment and has similar beneficial effects as the method embodiment. For technical details not disclosed in the device embodiment of this application, please refer to the description of the method embodiment of this application for understanding.

[0192] It should be noted that in the embodiment of the present application, if the above-mentioned charging method is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application, or the part that contributes to the relevant technology, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the methods described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a U disk, a mobile hard disk, a read-only memory (ROM), a magnetic disk or an optical disk. In this way, the embodiment of the present application is not limited to any specific combination of hardware and software.

[0193] In a third aspect, in order to implement the above-mentioned charging method, an embodiment of the present application provides an electronic device, including a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and when the processor executes the program, the steps in the charging method provided in the above-mentioned embodiment are implemented.

[0194] The following combination Figure 12 The electronic device 120 shown is used to illustrate a structural diagram of the electronic device.

[0195] In one example, the electronic device 120 may be the data processing terminal. Figure 12 As shown, the electronic device 120 includes: a processor 1201, at least one communication bus 1202, a user interface 1203, at least one external communication interface 1204, and a memory 1205. The communication bus 1202 is configured to enable communication between these components. The user interface 1203 may include a display screen, and the external communication interface 1204 may include a standard wired interface and a wireless interface.

[0196] The memory 1205 is configured to store instructions and applications executable by the processor 1201, and can also cache data to be processed or processed by the processor 1201 and various modules in the electronic device (for example, image data, audio data, voice communication data and video communication data), which can be implemented through flash memory (FLASH) or random access memory (Random Access Memory, RAM).

[0197] In a fourth aspect, an embodiment of the present application provides a storage medium, that is, a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps in the charging method provided in the above embodiment are implemented.

[0198] It should be noted that the description of the above storage medium and device embodiments is similar to the description of the above method embodiments and has similar beneficial effects as the method embodiments. For technical details not disclosed in the storage medium and device embodiments of this application, please refer to the description of the method embodiments of this application for understanding.

[0199] It should be understood that “one embodiment” or “an embodiment” mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, “in one embodiment” or “in some embodiments” appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. The above-mentioned serial numbers of the embodiments of the present application are for description only and do not represent the advantages and disadvantages of the embodiments.

[0200] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0201] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0202] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units; they may be located in one place or distributed across multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the scheme of this embodiment.

[0203] In addition, all functional units in the embodiments of the present application can be integrated into one processing unit, or each unit can be a separate unit, or two or more units can be integrated into one unit; the above-mentioned integrated units can be implemented in the form of hardware or in the form of hardware plus software functional units.

[0204] Those skilled in the art will understand that all or part of the steps of implementing the above-mentioned method embodiment can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above-mentioned method embodiment; and the aforementioned storage medium includes: mobile storage devices, read-only memories (ROM), magnetic disks or optical disks, and other media that can store program codes.

[0205] Alternatively, if the above-mentioned integrated unit of the present application is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application can be essentially or in other words, the part that contributes to the relevant technology can be embodied in the form of a software product, which is stored in a storage medium and includes a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROMs, magnetic disks, or optical disks.

[0206] The above is merely an embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A charging method, characterized in that: The method comprises: When the rechargeable battery is at a first temperature, a first charging rate is detected under a first pulse charging cycle; the first pulse charging cycle includes a first charging time and a first resting time; when the rechargeable battery is at the first temperature, a second charging rate is detected under a second pulse charging cycle; the second pulse charging cycle includes a second charging time and a second resting time; when the rechargeable battery is at the first temperature, a third charging rate is detected under a third pulse charging cycle; the third pulse charging cycle includes a third charging time and a third resting time; if the first value corresponding to the first pulse charging cycle is greater than the first value corresponding to the second pulse charging cycle, and the first value corresponding to the first pulse charging cycle is also greater than the first value corresponding to the third pulse charging cycle, then the charging parameter under the first pulse charging cycle is determined as the reference charging parameter corresponding to the first temperature in the parameter information; wherein the first value is the product of the charging rate and the charging time ratio; the charging time ratio is the ratio of the charging time to the pulse charging cycle; Detect the battery temperature of the rechargeable battery in the current environment; determining whether the battery temperature is less than or equal to a first temperature threshold; When the battery temperature is less than or equal to the first temperature threshold, searching for a reference charging parameter corresponding to the battery temperature in parameter information; the parameter information stores multiple groups of reference charging parameters, wherein one group of reference charging parameters corresponds to one battery temperature; The rechargeable battery is pulse charged based on a reference charging parameter corresponding to the battery temperature.

2. The method according to claim 1, characterized in that The reference charging parameters include: A charging rate, which is used to limit the magnitude of the charging current in the pulse charging mode; Charging time, which is used to limit the charging duration within a pulse charging cycle in the pulse charging mode; The rest time is used to limit the rest time in a pulse charging cycle in the pulse charging mode.

3. The method according to claim 1 , wherein when the reference charging parameters include a charging rate, a charging time, and a rest time, pulse charging the rechargeable battery based on the reference charging parameters corresponding to the battery temperature comprises: Referring to the charging rate, configuring the charging current of the pulse charging; configuring a pulse charging cycle of the pulse charging; The pulse charging cycle includes: charging time and rest time; The rechargeable battery is pulse charged with the charging current and the pulse charging cycle.

4. The method according to claim 1, wherein After determining whether the battery temperature is less than or equal to a first temperature threshold, the method further includes: When the battery temperature is greater than the first temperature threshold, the rechargeable battery is DC charged in a DC charging mode.

5. The method according to claim 1, wherein The method further comprises: After a first preset time, re-detect the battery temperature of the rechargeable battery in the current environment; determine whether the battery temperature is less than or equal to a first temperature threshold; if the battery temperature is less than or equal to the first temperature threshold, perform pulse charging on the rechargeable battery in a pulse charging mode; if the battery temperature is greater than the first temperature threshold, perform DC charging on the rechargeable battery in a DC charging mode; Wherein, the first preset time is greater than or equal to one pulse charging cycle.

6. A charging device, characterized in that: The charging device comprises: a determining unit, configured to, when the rechargeable battery is at a first temperature, detect a first charging rate under a first pulse charging cycle; the first pulse charging cycle includes a first charging time and a first resting time; when the rechargeable battery is at the first temperature, detect a second charging rate under a second pulse charging cycle; the second pulse charging cycle includes a second charging time and a second resting time; and when the rechargeable battery is at the first temperature, detect a third charging rate under a third pulse charging cycle; the third pulse charging cycle includes a third charging time and a third resting time; if a first value corresponding to the first pulse charging cycle is greater than a first value corresponding to the second pulse charging cycle, and the first value corresponding to the first pulse charging cycle is also greater than the first value corresponding to the third pulse charging cycle, then determine the charging parameter under the first pulse charging cycle as the reference charging parameter corresponding to the first temperature in the parameter information; wherein the first value is the product of the charging rate and the charging time ratio; the charging time ratio is the ratio of the charging time to the pulse charging cycle; A detection unit, used to detect the battery temperature of the rechargeable battery in the current environment; a determining unit, configured to determine whether the battery temperature is less than or equal to a first temperature threshold; A charging unit is configured to search parameter information for a reference charging parameter corresponding to the battery temperature when the battery temperature is less than or equal to the first temperature threshold; the parameter information stores multiple groups of reference charging parameters, wherein one group of reference charging parameters corresponds to one battery temperature.

7. An electronic device comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and when the processor executes the program, the charging method according to any one of claims 1 to 5 is implemented.

8. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the charging method according to any one of claims 1 to 5 is implemented.

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