CN112018848A

CN112018848A - Charging control method and device, terminal and computer readable storage medium

Info

Publication number: CN112018848A
Application number: CN202010880036.9A
Authority: CN
Inventors: 谢红斌
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2020-12-01

Abstract

The application discloses a charging control method, which comprises the following steps: acquiring the state of health (SOH) of a battery in the ith charging process of the battery_iWherein i is an integer greater than 1; according to the state of health SOH₁And the state of health SOH_iAcquiring the charging current value I of the (I + 1) th charging of the battery_i+1(ii) a And using said charging current value I_i+1And charging the battery for the (i + 1) th time. The application also discloses a charging control device, a terminal and a computer readable storage medium, which can control the charging current value of the terminal, avoid the charging current exceeding the maximum charging current which can be borne by the battery in the current state, so as to slow down the aging speed of the battery, avoid the increase of the charging time and prevent the battery from being in a high-temperature state for a long time to cause accidents.

Description

Charging control method and device, terminal and computer readable storage medium

Technical Field

The present invention relates to the field of charging, and more particularly, to a charging control method, a charging control apparatus, a terminal, and a computer-readable storage medium.

Background

In the charging process at the present stage, the charging speed is generally fixed, that is, as long as the charging environment (adapter, fast charging protocol) and the like are matched with the corresponding charging conditions, the charging is automatically performed with the preset charging current. However, as the number of times of charging increases, the internal resistance value of the battery gradually increases, and the battery gradually ages as the internal resistance value of the battery increases. After the battery is aged, the capacity of the battery is attenuated, and then the battery is charged by the same charging current, so that the charging current may exceed the maximum charging current which can be borne by the battery in the current state, the aging of the battery is aggravated, and even the battery is in a high-temperature state for a long time to cause a dangerous accident. In addition, the internal resistance of the battery is increased, and the battery can reach the cut-off voltage in the constant-current charging stage in advance when being charged by the same current, so that the constant-voltage charging stage is longer, and the whole charging time is increased.

Disclosure of Invention

The embodiment of the application provides a charging control method, a charging control device, a terminal and a computer readable storage medium.

The charging control method according to the embodiment of the application includes: acquiring the state of health (SOH) of a battery in the ith charging process of the battery_iWherein i is an integer greater than 1; according to the initial state of health SOH of the battery₁And the state of health SOH_iAcquiring the charging current value I of the (I + 1) th charging of the battery_i+1(ii) a And using said charging current value I_i+1And charging the battery for the (i + 1) th time.

The charging control device comprises one or more processors, and the one or more processors are used for acquiring the state of health (SOH) of the battery in the ith charging process of the battery_iWherein i is an integer greater than 1; according to the initial state of health SOH of the battery₁And the state of health SOH_iAcquiring the charging current value I of the (I + 1) th charging of the battery_i+1(ii) a And using said charging current value I_i+1And charging the battery for the (i + 1) th time.

The charging control device of the embodiment of the application comprises a first acquisition module, a second acquisition module and a charging module. The first acquisition module is used for acquiring the SOH of the battery in the ith charging process of the battery_iWherein i is an integer greater than 1. The second acquisition module is used for acquiring the SOH according to the initial state of health (SOH) of the battery₁And the state of health SOH_iAcquiring the charging current value I of the (I + 1) th charging of the battery_i+1. The charging module is used for adopting the charging currentValue I_i+1And charging the battery for the (i + 1) th time.

The terminal of the embodiment of the application comprises a battery and the charging control device. The charging control device comprises one or more processors, and the one or more processors are used for acquiring the state of health (SOH) of the battery in the ith charging process of the battery_iWherein i is an integer greater than 1; according to the initial state of health SOH of the battery₁And the state of health SOH_iAcquiring the charging current value I of the (I + 1) th charging of the battery_i+1(ii) a And using said charging current value I_i+1And charging the battery for the (i + 1) th time.

The terminal of the embodiment of the application comprises a battery and the charging control device. The charging control device comprises a first acquisition module, a second acquisition module and a charging module. The first acquisition module is used for acquiring the SOH of the battery in the ith charging process of the battery_iWherein i is an integer greater than 1. The second acquisition module is used for acquiring the SOH according to the initial state of health (SOH) of the battery₁And the state of health SOH_iAcquiring the charging current value I of the (I + 1) th charging of the battery_i+1. The charging module is used for adopting the charging current value I_i+1And charging the battery for the (i + 1) th time.

The non-transitory computer-readable storage medium of the embodiments of the present application contains a computer program that, when executed by one or more processors, causes the processors to implement a charging control method that: acquiring the state of health (SOH) of a battery in the ith charging process of the battery_iWherein i is an integer greater than 1; according to the state of health SOH₁And the state of health SOH_iAcquiring the charging current value I of the (I + 1) th charging of the battery_i+1(ii) a And using said charging current value I_i+1And charging the battery for the (i + 1) th time.

Charge control method, charge control device, terminal, and non-volatile computer-readable storage medium according to embodiments of the present application, using state of health (SOH)₁And state of health SOH_iAcquiring the charging current value I of the I +1 th charging of the battery_i+1And can adopt the charging current value I_i+1Charging the terminal for the (i + 1) th time, and avoiding the charging current from exceeding the maximum charging current which can be borne by the battery in the current state so as to slow down the aging speed of the battery, avoid the increase of the charging time and prevent the accident caused by the long-time high-temperature state of the battery.

Additional aspects and advantages of embodiments of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic flow chart diagram of a charge control method according to certain embodiments of the present application;

FIG. 2 is a schematic structural diagram of a charge control device according to certain embodiments of the present application;

FIG. 3 is a schematic diagram of a charging scenario for a terminal according to some embodiments of the present application;

fig. 4 to 6 are schematic flow charts of a charging control method according to some embodiments of the present disclosure;

FIG. 7 is a block diagram of a terminal according to some embodiments of the present application;

FIG. 8 is a schematic diagram of a connection state of a computer-readable storage medium and a processor according to some embodiments of the present application.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the embodiments of the present application, and are not to be construed as limiting the embodiments of the present application.

Referring to fig. 1 to 3, a charging control method is provided in an embodiment of the present disclosure. The charging control method comprises the following steps:

02: during the ith charging of the battery 20, the state of health SOH of the battery 20 is acquired_iWherein i is an integer greater than 1;

03: according to initial state of health SOH of battery₁And state of health SOH_iObtaining the charging current value I of the I +1 th charging of the battery 20_i+1(ii) a And

04: using the value of the charging current I_i+1The battery 20 is charged i +1 th time.

Referring to fig. 2, the charging control apparatus 200 of the present embodiment includes a first obtaining module 211, a second obtaining module 212, and a charging module 214. The first acquiring module 211, the second acquiring module 212, and the charging module 214 are used to perform the methods in 02, 03, and 04, respectively. That is, the first obtaining module 211 is used for obtaining the state of health SOH of the battery 20 during the ith charging of the battery 20_iWherein i is an integer greater than 1; the second obtaining module 212 is used for obtaining the initial state of health SOH1 and the state of health SOH of the battery 20_iObtaining the charging current value I of the I +1 th charging of the battery 20_i+1(ii) a The charging module 214 is used for adopting a charging current value I_i+1The battery 20 is charged i +1 th time.

Referring to fig. 3, a terminal 100 according to an embodiment of the present disclosure includes a battery 20 and a charge control device 40. The charge control device 40 includes a processor 30. The processor 30 is used to execute the methods in 02, 03, and 04. That is, the processor 30 is used for acquiring the state of health SOH of the battery 20 during the ith charging of the battery 20_iWherein i is an integer greater than 1; according to state of health SOH₁And the state of health SOHi obtains the charging current value I of the I +1 th charging of the battery 20_i+1(ii) a And using the value of the charging current I_i+1The battery 20 is charged i +1 th time.

The terminal 100 includes a mobile phone, a tablet computer, a notebook computer, a teller machine, an intelligent watch, an intelligent bracelet, an intelligent household appliance, a game machine, a head display device, and the like, and in these terminals, a lithium ion battery is often used to supply power. The current terminal functions are more and more abundant, and the requirement for quick charging of the lithium battery is higher and higher. Since the aging of the battery is inevitable as the number of times of charging increases, an improper charging control method may cause the aging of the battery to be aggravated, the charging time to be increased, and even the battery to be in a high temperature state for a long time to cause an accident. In the existing battery charging technology, a charging method combining two stages of constant current charging and constant voltage charging is generally adopted. Namely, constant current charging is firstly carried out on the lithium battery by adopting constant current, and constant voltage charging is carried out on the lithium battery by adopting the battery cell charging cut-off voltage after the voltage of the battery cell of the lithium battery reaches the preset battery cell charging cut-off voltage, and the charging current is gradually reduced. When the charging current is reduced to a charging cut-off current, the charging is finished, and the battery cell of the lithium battery reaches a full-charge state.

The charging control method, the charging control device 200, the charging control device 40 and the terminal 100 provided by the application optimize the constant current charging stage of the battery 20. During the ith charging of the battery 20, the state of health SOH of the battery 20 is acquired_iWherein i is an integer greater than 1. According to the initial state of health SOH of the battery 20₁And the state of health SOHi obtains the charging current value I of the I +1 th charging of the battery 20_i+1. Wherein the initial state of health SOH of the battery 20₁May be at a preset initial charging current value I₁State of health SOH obtained during initial charging of battery 20₁At this time, the initial charging process may be a process of performing a first charging when the user uses the mobile phone; initial state of health SOH of battery 20₁Or directly call the state of health SOH stored in the internal memory 50 or the cloud₁Of course, the called state of health SOH₁Also using a preset initial charging current value I₁The initial charging of the battery 20 is obtained only if the charging process may be stored in the internal memory 50 or the cloud of the terminal 100 at the factory before the factory shipment. By adopting the charging current value I after optimization_i+1The battery 20 is charged i +1 th time. Value of charging current I_i+1Is determined according to the degree of aging of the battery 20The charging current value of (1). Charging current value I of I +1 th charging_i+1Less than the initial charging current value I₁The charging current can be prevented from exceeding the maximum charging current that the battery 20 can bear in the current state, so as to slow down the aging speed of the battery 20, avoid the increase of the charging time, and prevent the accident caused by the long-time high-temperature state of the battery 20. Wherein the initial charging current value I₁Is the charging current value that is used when the battery 20 is charged in the constant current charging phase before the optimization by the charging control method provided by the present application.

Referring again to fig. 1, in some embodiments, the charging control method further includes:

01: acquiring initial state of health SOH of battery 20₁；

Referring to fig. 2 again, in some embodiments, the charging control apparatus 200 may further include a third obtaining module 213. The third obtaining module 213 is configured to execute the method in 01. That is, the third obtaining module 213 is used for obtaining the initial state of health SOH of the battery 20₁。

Referring again to fig. 3, in some embodiments, the processor 30 is further configured to perform the method of fig. 01. That is, the processor 30 is also used for obtaining the initial state of health SOH of the battery 20₁。

In certain embodiments, the initial state of health, SOH, of the battery 20₁Is known information, stored in the internal memory 50 or in the cloud, and can be called directly when needed.

In some embodiments, the initial charging current value I may be adopted₁During the initial charging of the battery, the initial state of health SOH of the battery 20 is obtained₁And the initial state of health SOH₁The information is stored in the internal memory 50.

Referring to fig. 4, in some embodiments, 01: acquiring initial state of health SOH of battery 20₁The method comprises the following steps:

011: acquiring a voltage change value DeltaV of the battery 20 in a first preset time period before the battery 20 finishes initial charging₁；

013: acquisition of initial charge end of battery 20Instantaneous current value I at charging instant_{Instantaneous 1}；

015: according to voltage variation value DeltaV₁And instantaneous current value I_{Instantaneous 1}Obtaining the initial internal resistance value R of the battery 20₁(ii) a And

017: according to the initial internal resistance value R₁And rated internal resistance value R₀Calculating state of health SOH₁。

Referring to fig. 2 again, in some embodiments, the third obtaining module 213 of the charging control apparatus 200 may include a first obtaining unit 2131, a second obtaining unit 2133, a third obtaining unit 2135, and a calculating unit 2137. A first acquisition unit 2131 is used to execute the method in 011, a second acquisition unit 2133 is used to execute the method in 013, a third acquisition unit 2135 is used to execute the method in 015, and a calculation unit 2137 is used to execute the method in 017. That is, the first acquiring unit 2131 is configured to acquire the voltage change value Δ V of the battery 20 in a first preset time period before the battery 20 finishes the initial charging₁. The second acquiring unit 2133 is used for acquiring the instantaneous current value I at the moment when the battery 20 finishes charging at the time of initial charging_{Instantaneous 1}. A third obtaining unit 2135 for obtaining a voltage variation value Δ V according to the voltage variation value Δ V₁And instantaneous current value I_{Instantaneous 1}Obtaining the initial internal resistance value R of the battery 20₁. The calculating unit 2137 is used for calculating the initial internal resistance value R₁And rated internal resistance value R₀Calculating state of health SOH₁。

Referring again to FIG. 3, in some embodiments, processor 30 is also configured to perform the methods of 011, 013, 015, and 017. That is, the processor 30 is further configured to obtain the voltage variation value Δ V of the battery 20 in a first preset time period before the battery 20 finishes the initial charging₁(ii) a Obtaining the instantaneous current value I at the moment when the battery 20 finishes charging during the initial charging_{Instantaneous 1}(ii) a According to voltage variation value DeltaV₁And instantaneous current value I_{Instantaneous 1}Obtaining the initial internal resistance value R of the battery 20₁(ii) a And according to the initial internal resistance value R₁And rated internal resistance value R₀Calculating state of health SOH₁。

The state of health SOH of the battery 20 is a percentage value greater than 0% and less than or equal to 100% reflecting the current storage capacity of the battery 20 with respect to the new battery 20. There are various methods for measuring the state of health SOH of the battery 20, and in the embodiment of the present application, the state of health SOH of the battery 20 is measured by the internal resistance value of the battery 20.

Specifically, the embodiment of the present application obtains the internal resistance value of the battery 20 according to the ohm law R ═ Δ V/I, and then obtains the actual initial ohmic internal resistance value R of the battery 20 according to the ohm law R ═ Δ V/I₁And the rated internal resistance value R of the battery 20₀Calculating the initial state of health SOH of the battery 20₁. When the battery 20 is initially charged, that is, the battery 20 is charged for the first time, the charging current is reduced to zero at the end of the first charging of the battery 20, and the voltage drop occurs in the battery 20 during the first preset time period when the charging current is reduced to zero. Then, the voltage variation Δ V of the battery 20 may be obtained during a first preset time period before the battery 20 finishes the initial charging₁. The first preset time period may be 0s to 1s before the battery 20 finishes the initial charging. For example, the initial charging of the battery 20 starts from the 1 st s and ends from the 600 th s, and the first preset time period is a period of time from the 599 th s to the 600 th s. If the first preset time period is more than 1s, acquiring a voltage change value delta V₁Will be too long, and the voltage variation value DeltaV obtained at this time₁The obtained initial ohmic internal resistance value R is obtained by including the voltage of ohmic internal resistance and the voltage of polarized internal resistance₁Is inaccurate. The first preset time period of the embodiment of the present application is from 0s to 1s before the battery 20 finishes the initial charging, and the obtained initial ohmic internal resistance value R may be reduced₁Error due to the influence of polarization internal resistance. Before the battery 20 finishes the initial charging, the instantaneous current value I before the current drops to zero at the moment when the battery 20 finishes the charging is also acquired_{Instantaneous 1}. The instant at which the battery 20 ends charging may be a certain time within a first preset time period. For example, the initial charging of the battery 20 is started from 1 st s, ended from 600 th s, and the first preset time period is a period of time from 599 th s to 600 th s, the instantaneous current values may be the instantaneous current of the battery 20 at 599.0 th s, the instantaneous current of the battery 20 at 599.2 th s, the instantaneous current of the battery 20 at 599.5 th s, the instantaneous current of the battery 20 at 599.9 th s, the instantaneous current of the battery 20 at 599 th s, and the instantaneous current value of the battery 20 at 599 th s,The instantaneous current of the 600.0s battery 20, etc., are not listed here. Thus, can be based on R₁＝△V₁/I_{Instantaneous 1}Obtaining an initial ohmic internal resistance value R of the battery 20₁。

According to the initial ohmic internal resistance value R of the battery 20₁And the rated internal resistance value R of the battery 20₀The initial state of health SOH of the battery 20 can be calculated₁＝R₀/R₁. Generally, the nominal internal resistance value R of the battery 20 is the first time the battery 20 is charged₀Slightly less than or equal to the initial ohmic internal resistance R of the battery 20₁I.e. SOH₁＝R₀/R ₁100% or close to 100%, e.g. SOH₁＝99.98％、SOH₁99.97%, and so on. However, the initial ohmic internal resistance value R of the battery 20 actually produced₁May be less than the rated internal resistance value R of the battery 20₀Resulting in an initial state of health SOH of the battery 20₁The calculated result is greater than 100%, which is not in line with the definition of the state of health of the battery, and it is necessary to determine the initial state of health SOH of the battery 20 at this time₁The calculation result of (2) is corrected to 100%.

Referring to fig. 5, in some embodiments, 02: during the ith charging of the battery 20, the state of health SOH of the battery 20 is acquired_iThe method comprises the following steps:

021: acquiring a voltage change value DeltaV of the battery 20 in a second preset time period before the battery 20 finishes the ith charging_i；

023: obtaining the instantaneous current value I at the moment when the battery 20 finishes charging at the ith charging_{Instantaneous i}；

025: according to voltage variation value DeltaV_iAnd instantaneous current value I_{Instantaneous i}The internal resistance value R of the battery 20 after the ith charge is obtained_i(ii) a And

027: according to internal resistance value R_iAnd initial internal resistance value R₁Calculating state of health SOH_i。

Referring again to fig. 2, in some embodiments, the first obtaining module 211 of the charging control device 200 may include a first obtaining component 2111, a second obtaining component 2113 and a third obtaining component2115, and a computing component 2117. The first acquisition component 2111 is used to perform the method in 021, the second acquisition component 2113 is used to perform the method in 023, the third acquisition component 2115 is used to perform the method in 025 and the calculation component 2117 is used to perform the method in 027. That is, the first acquiring component 2111 is used for acquiring the voltage variation value Δ V of the battery 20 in a second preset time period before the battery 20 finishes the ith charging_i. The second obtaining component 2113 is used for obtaining the instantaneous current value I at the moment when the charging of the battery 20 is finished at the ith charging_{Instantaneous i}. The third acquisition component 2115 is used for acquiring the voltage change value delta V_iAnd instantaneous current value I_{Instantaneous i}The internal resistance value R of the battery 20 after the ith charge is obtained_i. The calculating component 2117 is used for calculating the internal resistance value R_iAnd initial internal resistance value R₁Calculating state of health SOH_i。

Referring again to FIG. 3, in some embodiments, the processor 30 is further configured to perform the methods of 021, 023, 025 and 027. That is, the processor 30 is further configured to obtain the voltage variation value Δ V of the battery 20 in a second preset time period before the battery 20 finishes the ith charging_i(ii) a Obtaining the instantaneous current value I at the moment when the battery 20 finishes charging at the ith charging_{Instantaneous i}(ii) a According to voltage variation value DeltaV_iAnd instantaneous current value I_{Instantaneous i}The internal resistance value R of the battery 20 after the ith charge is obtained_i(ii) a And according to the internal resistance value R_iAnd initial internal resistance value R₁Calculating state of health SOH_i。

Wherein the state of health SOH of the battery 20_iIs the state of health of the battery 20 after the battery is charged for the ith time. State of health SOH of battery 20_iMay pass through the initial ohmic internal resistance value R of the battery 20₁And ohmic internal resistance value R of battery 20 after the end of ith charge_iThe ratio of the two is measured. Ohmic internal resistance value R of battery 20 after ith charging is finished_iIt can pass through R_i＝△V_i/I_{Instantaneous i}And (6) calculating and obtaining. Delta V_iIs the voltage variation value, I, of the battery 20 in a second preset time period before the battery 20 finishes the ith charge_{Instantaneous i}Is the instant before the end of the ith charge of the battery 20The instantaneous current value before the current drops to zero, and the instantaneous moment when the battery 20 finishes charging may be a certain moment in the second preset time period. The second preset time period may be 0s to 1s before the battery 20 finishes the ith charge. If the second preset time period is more than 1s, acquiring a voltage change value delta V_iWill be too long, and the voltage variation value DeltaV obtained at this time_iThe voltage of ohmic internal resistance and the voltage of polarized internal resistance are included, so that the obtained ohmic internal resistance value R after the ith charging is finished_iIs inaccurate. The second preset time period of the embodiment of the present application is from 0s to 1s before the battery 20 finishes the ith charge, and the obtained ohmic internal resistance value R after the ith charge is finished may be reduced_iError due to the influence of polarization internal resistance.

According to the initial ohmic internal resistance value R of the battery 20₁And ohmic internal resistance value R of battery 20 after the end of ith charge_iThe state of health SOH of the battery 20 after the ith charging can be calculated_i＝R₁/R_i. As battery 20 is used, the ohmic resistance of battery 20 increases, i.e., R_iIncreasing, then state of health SOH_iThis decreases, and reflects a decrease in the power storage capacity of the new battery 20 (the battery 20 after the first charge) after the ith charge of the battery 20. It is to be understood that the second preset time period may be the same as or different from the first preset time period, for example, in this embodiment, the second preset time period and the first preset time period are both within 1 second before the charging is finished, in other embodiments, the first preset time period is both within 1 second before the charging is finished, and the second preset time period may be within 0.5 second, within 0.7 second, within 0.1 second before the charging is finished, which is not listed herein.

Referring to fig. 6, in some embodiments, 03: according to state of health SOH₁And state of health SOH_iAcquiring the charging current value I of the I +1 th charging of the battery_i+1The method comprises the following steps:

031: according to state of health SOH₁And state of health SOH_iObtaining the aging factor alpha of the i +1 charging time of the battery 20_i+1(ii) a And

033: according to the aging factor alpha_i+1And initial charging current value I₁Obtaining the charging current value I of the I +1 th charging of the battery 20_i+1。

Referring again to fig. 2, in some embodiments, the second obtaining module 212 of the charging control device 200 may further include a first obtaining structure 2121 and a second obtaining structure 2123. The first acquisition structure 2121 is used to perform the method in 031 and the second acquisition structure 2123 is used to perform the method in 023. That is, the first acquisition structure 2121 is used to acquire the SOH according to the state of health₁And state of health SOH_iObtaining the aging factor alpha of the i +1 charging time of the battery 20_i+1. The second acquisition structure 2123 is for deriving the aging factor α_i+1And initial charging current value I₁Obtaining the charging current value I of the I +1 th charging of the battery 20_i+1。

Referring again to fig. 3, in some embodiments, the processor 30 is also configured to perform the methods of 031 and 033. That is, processor 30 is also configured to determine the state of health SOH₁And state of health SOH_iObtaining the aging factor alpha of the i +1 charging time of the battery 20_i+1(ii) a And according to the aging factor alpha_i+1And initial charging current value I₁Obtaining the charging current value I of the I +1 th charging of the battery 20_i+1。

In particular, the aging factor α_i+1＝SOH_i/SOH₁Aging factor alpha_i+1For measuring the degree of aging of the battery 20. I is_i+1＝α_i+1*I₁In order to take the degree of aging of the battery 20 into consideration, the battery 20 is charged with a charging current in the constant current charging stage at the i +1 th charging. When the battery 20 is charged for the (I + 1) th time, if the initial charging current value I is still used in the constant current charging stage of the battery 20 due to the aging of the battery 20₁Charging, then the initial charging current value I₁The maximum charging current that the battery 20 can bear in the current state may be exceeded, which may lead to an increased aging of the battery 20, an increased charging time, and even an accident caused by a long-time high temperature state of the battery 20. In the embodiment of the present application, the battery 20 may be charged for the (i + 1) th time according to the aging factor α_i+1And initial charging current value I₁Obtaining the charging current value I of the I +1 th charging of the battery 20_i+1Due to SOH_iLess than SOH₁，α_i+1Is a constant less than 1, passes through I_i+1＝α_i+1*I₁Calculating the obtained I_i+1Is less than I₁Using the value of the charging current I_i+1Charging the battery 20 for the (i + 1) th time can avoid that the charging current during the (i + 1) th charging exceeds the maximum charging current that the battery 20 can bear in the current state, so as to avoid the problems of aging aggravation, charging time increase, time in a high-temperature state and the like of the battery 20.

In some embodiments, may be through I_i+1＝α_i+1*I₁Calculating the charging current I of the acquired I +1 th charging_i+1Charging current I actually used for ith charging_iThe comparison results in a comparison value beta_i+1. Comparison value

Charging current I for balancing the I +1 th charge_i+1Compared with the charging current I actually used in the ith charging_iThe degree of change in the amount of the compound. Then beta is converted into_i+1And comparing with a preset threshold value to measure the necessity of adjusting the charging current. For example, if the preset threshold is 1%, then β is_i+1When the charge current is less than 1%, the charge current I of the (I + 1) th charge is considered_i+1Compared with the charging current I actually used in the ith charging_iHas small variation degree, does not need to change the charging current of the (I + 1) th charging, namely I is still adopted during the (I + 1) th charging_iAs a charging current; when beta is_i+1When the charge current is more than 1%, the charge current I of the I +1 th charge is considered_i+1Compared with the charging current I actually used in the ith charging_iThe charging current of the (I + 1) th charging is required to be changed, namely I is adopted during the (I + 1) th charging_i+1As a charging current; when beta is_i+1When 1% is equal, I may be used_iAs the charging current, I may be used_i+1As a charging current. Thus, when the battery 20 is frequently charged in a short time, the battery 20 can be prevented from being aged more quickly due to frequent change of the current value of the constant current charging.

Referring to fig. 3 and fig. 7, a terminal 100 is further provided in an embodiment of the present disclosure, where the terminal 100 includes the charging control device 40, the battery 20, the internal memory 50, the display 60, and the system bus 70 in any of the above embodiments. The charging control device 40 includes a processor 30, and the charging control device 40 is provided in the terminal 100 for controlling a charging current value of the terminal 100 to the battery 20. The battery 20 is used to supply electric power to the terminal 100. The internal memory 50 is used for storing operation data of the processor 30. The display 60 is used for inputting instructions to the terminal 100 by a user and displaying information such as the state of health SOH of the battery 20, remaining power information, and charging time of the battery 20 to the user. System bus 70 is used to transfer information among the respective components in terminal 100, such as charge control device 40, internal memory 50, and display 60. Referring to fig. 3, when the terminal 100 is connected to the power adapter 500 through the charging cable 300 for charging, the charging control device 40 can adopt a charging current value I_i+1The battery 20 is charged for the (i + 1) th time, so that the charging current in the (i + 1) th charging process can be prevented from exceeding the maximum charging current which can be borne by the battery 20 in the current state, and the problems of aging aggravation, charging time increase, high temperature state of the battery 20 and the like can be avoided.

The present embodiment also provides a terminal 100, where the terminal 100 includes the charging control device 200 and the battery 20 of any of the above embodiments, and the charging control device 200 may be used to charge the battery 20.

Referring to fig. 8, the present application also provides a non-volatile computer-readable storage medium 400 containing a computer program 401. The computer program 401, when executed by the one or more processors 30, causes the processor 30 to perform the charging control method of any of the embodiments described above.

Referring to fig. 3 and 7, for example, when the computer program 401 is executed by the one or more processors 30, the processor 30 executes the following charging control method:

01: acquiring initial state of health SOH of battery 20₁；

02: during the ith charging of the battery 20, the state of health SOH of the battery 20 is acquired_iWhich isWherein i is an integer greater than 1;

03: according to state of health SOH₁And state of health SOH_iObtaining the charging current value I of the I +1 th charging of the battery 20_i+1(ii) a And

As another example, the computer program 401, when executed by the one or more processors 30, causes the processor 30 to perform the following charge control method:

013: obtaining the instantaneous current value I at the moment when the battery 20 finishes charging during the initial charging_{Instantaneous 1}；

02: during the ith charging of the battery 20, the state of health SOH of the battery 20 is obtained_iWherein i is an integer greater than 1;

In the description herein, references to the description of the terms "certain embodiments," "one example," "exemplary," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.

Although embodiments of the present application have been shown and described above, it is to be understood that the above embodiments are exemplary and not to be construed as limiting the present application, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims

1. A charge control method, comprising:

acquiring the state of health (SOH) of a battery in the ith charging process of the battery_iWherein i is an integer greater than 1;

according to the initial state of health SOH of the battery₁And the state of health SOH_iAcquiring the charging current value I of the (I + 1) th charging of the battery_i+1(ii) a And

using said charging current value I_i+1And charging the battery for the (i + 1) th time.

2. The charge control method according to claim 1, characterized by further comprising:

obtaining an initial state of health (SOH) of the battery₁。

3. The charge control method according to claim 2, wherein the acquiring of the initial state of health SOH of the battery₁The method comprises the following steps:

acquiring a voltage change value DeltaV of the battery in a first preset time period before the battery finishes initial charging₁；

Obtaining the instantaneous current value I of the instant moment when the battery finishes charging during initial charging_{Instantaneous 1}；

According to the voltage change value DeltaV₁And the instantaneous current value I_{Instantaneous 1}Obtaining an initial internal resistance value R of the battery₁(ii) a And

according to the initial internal resistance value R₁And rated internal resistance value R₀Calculating the state of health SOH₁。

4. The charge control method according to claim 3, wherein the acquiring the state of health (SOH) of the battery_iThe method comprises the following steps:

acquiring a voltage change value DeltaV of the battery in a second preset time period before the battery finishes the ith charging_i；

Acquiring the instantaneous current value I of the moment when the battery finishes charging at the ith time_{Instantaneous i}；

According to the voltage change value DeltaV_iAnd the instantaneous current value I_{Instantaneous i}Obtaining the internal resistance value R of the battery after the ith charging_i(ii) a And

according to the internal resistance value R_iAnd initial internal resistance value R₁Calculating the state of health SOH_i。

5. The charge control method according to claim 1, wherein the state of health SOH is based on the state of health SOH₁And the state of health SOH_iAcquiring the charging current value I of the (I + 1) th charging of the battery_i+1The method comprises the following steps:

according to the state of health SOH₁And the state of health SOH_iObtaining the batteryAging factor alpha of i +1 th charge_i+1(ii) a And

according to the aging factor alpha_i+1And initial charging current value I₁Acquiring the charging current value I of the (I + 1) th charging of the battery_i+1。

6. A charge control device, comprising one or more processors configured to:

7. The charge control device of claim 6, wherein one or more of the processors are further configured to:

8. The charge control device of claim 6, wherein one or more of the processors are further configured to:

acquiring a voltage change value delta of the battery in a second preset time period before the battery finishes the ith chargingV_i；

9. The charge control device of claim 6, wherein one or more of the processors are further configured to:

according to the state of health SOH₁And the state of health SOH_iObtaining the aging factor alpha of the battery charged for the (i + 1) th time_i+1(ii) a And

10. A charge control device, characterized by comprising:

the first acquisition module is used for acquiring the state of health (SOH) of the battery in the ith charging process of the battery_iWherein i is an integer greater than 1;

a second acquisition module for acquiring an SOH of the battery according to an initial state of health of the battery₁And the state of health SOH_iAcquiring the charging current value I of the (I + 1) th charging of the battery_i+1(ii) a And

a charging module for adopting the charging current value I_i+1And charging the battery for the (i + 1) th time.

11. A terminal, comprising:

a battery; and

the charge control device of any one of claims 6-10, configured to control charging of the battery.

12. One or more non-transitory computer-readable storage media storing a computer program that, when executed by one or more processors, implements the charge control method of any one of claims 1 to 5.