WO2015196641A1

WO2015196641A1 - Battery charging method and device, and computer storage medium

Info

Publication number: WO2015196641A1
Application number: PCT/CN2014/088646
Authority: WO
Inventors: 马加加
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-06-23
Filing date: 2014-10-15
Publication date: 2015-12-30
Also published as: CN105305514A

Abstract

A battery charging method and device, and a computer storage medium. The method comprises: before charging, acquiring the ageing rate of a battery, wherein the ageing rate of the battery refers to the ratio between the battery capacity of the battery which was last charged from no power to full charge and the standard capacity of the battery; and in accordance with a charging method corresponding to the ageing rate of the battery, charging the battery.

Description

Battery charging method, device and computer storage medium

Technical field

The present invention relates to the field of battery technologies, and in particular, to a battery charging method, apparatus, and computer storage medium.

Background technique

Today, lithium-ion batteries are widely used in consumer electronics and electric power equipment due to their high energy density, high open circuit voltage, high output power, low self-discharge, and no memory effect.

At present, due to the strong promotion of environmental protection, electric energy has become more and more concerned because of its non-polluting nature. Today, the battery capacity of consumer products has reached 3AH (Ampere-Hour, ampere-hour, unit for measuring the capacity of storage equipment). 1AH means that the power storage device continues to operate for 1 hour or more when the power supply current intensity is 1A. The electric bicycle battery capacity has a single capacity of 10AH, and generally uses 40AH or more. The capacity of electric vehicle batteries is generally more than 80AH. With such a large capacity, if you want to charge in a short time, you must use a fast charging solution. The main reason for fast charging is still high current charging, usually using 1C or even 2C charging. C represents the ratio of the magnitude of the current when the battery is charged and discharged, that is, the magnification. For example, a 1200 mAh battery, 0.2 C means 240 mA (0.2 mA of 1200 mAh), and 1 C means 1200 mA (1 times rate of 1200 mAh). High current charging will inevitably lead to a decrease in battery life. Studies have shown that the aging rate of charging with 2C is 1.63 times that of 1C charging, and as the battery ages, the aging rate is rising, so it has been in the constant current phase. Charging with the same high current will aggravate battery aging and reduce the life of lithium-ion batteries.

Summary of the invention

In order to solve the existing technical problems, embodiments of the present invention provide a battery charging method, apparatus, and computer storage medium.

In one aspect, an embodiment of the present invention provides a battery charging method, including:

Before charging, obtain the aging rate of the battery; wherein, the aging rate of the battery refers to the ratio between the battery capacity from the last time the battery is discharged to the full capacity of the battery and the standard capacity of the battery;

The battery is charged in accordance with a charging method corresponding to the aging rate of the battery.

In the above solution, before obtaining the aging rate of the battery, the method further includes:

Make sure not to charge quickly.

In the above solution, the charging is performed according to a charging manner corresponding to an aging rate of the battery, including:

When the aging rate of the battery is greater than the first threshold, charging is performed according to the first charging current.

In the above solution, when the aging rate of the battery is less than or equal to the first threshold and greater than the second threshold, charging is performed according to the second charging current; wherein the second charging current is greater than the first charging current.

In the above solution, when the aging rate of the battery is less than or equal to the second threshold and greater than the third threshold, charging is performed according to the third charging current; wherein the third charging current is greater than the second charging current;

When the aging rate of the battery is less than or equal to a third threshold, charging is performed according to a fourth charging current; wherein the fourth charging current is greater than the third charging current.

In another aspect, an embodiment of the present invention provides a battery charging apparatus, including:

The aging rate acquisition module is configured to obtain the aging rate of the battery before charging; wherein, the aging rate of the battery refers to a ratio between the battery capacity from the last time the battery is no longer charged to the full charge and the standard capacity of the battery;

a power management module configured to supply power according to a charging mode corresponding to an aging rate of the battery The pool is charged.

In the above solution, the power management module is further configured to: when the fast charging is not performed, trigger the aging rate acquisition module to acquire the aging rate of the battery.

In the above solution, the power management module is configured to:

In the above solution, the power management module is further configured to:

When the aging rate of the battery is less than or equal to the first threshold and greater than the second threshold, charging is performed according to the second charging current; wherein the second charging current is greater than the first charging current.

In the above solution, the power management module is further configured to:

When the aging rate of the battery is less than or equal to the second threshold and greater than the third threshold, charging is performed according to the third charging current; wherein the third charging current is greater than the second charging current;

The embodiment of the invention further provides a computer storage medium, the computer storage medium comprising a set of instructions, when executed, causing at least one processor to perform the battery charging method described above.

The beneficial effects of the embodiments of the present invention are as follows:

The embodiment of the invention determines the charging mode according to the aging rate of the battery, so that when the device uses the lithium ion battery, the use efficiency can be more effectively improved, and the service life of the lithium ion battery is prolonged.

DRAWINGS

In the drawings, which are not necessarily to scale, the Like reference numerals with different letter suffixes may indicate different examples of similar components. The drawings generally illustrate the various embodiments discussed herein by way of example and not limitation.

1 is a flow chart of a battery charging method in an embodiment of the present invention;

2 is a schematic structural view of a battery charging device in an embodiment of the present invention;

3 is a schematic structural diagram of a charging device suitable for a portable terminal device according to an embodiment of the present invention;

4 is a schematic structural view of a charging device suitable for a removable rechargeable battery in an embodiment of the present invention;

FIG. 5 is a flowchart of a method for dynamically adjusting a charging mode according to an embodiment of the present invention.

detailed description

The invention will be further described in detail below with reference to the drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In various embodiments of the present invention, the aging rate of the battery is monitored by the actual use of the device (battery-powered device), and when the battery enters different aging stages, the charging mode is adjusted in time to achieve Maximize the service life of the battery to solve the problem of increased battery aging and reduced life caused by the rapid charging of the prior art battery.

Specifically, the capacity of the battery device is fully monitored during use, and the device is in use, depending on the condition of using the battery, the degree of aging of the battery is different, and the charging mode is adjusted in real time to achieve a larger extended battery. life. The functional modules mainly include: a battery, a main chip, a power management module, and an adapter module.

The monitoring of the number of times of charging and discharging the battery is mainly based on the data obtained in the Battery Management System (BMS). According to the expected service life of various batteries, the most appropriate switching point is set. In the current data, the intelligence is obtained. The battery life of the terminal is required to be 500 times. The battery life of electric bicycles and electric vehicles is required to be more than 2,000 times, and the capacity is reduced to 80% as the end of life. Based on these two conventional data and the change in the aging rate of the battery obtained in the charge and discharge test, a suitable switching point is established. Therefore, in the embodiment of the present invention, the charging mode is adjusted according to the aging degree of the battery. When the BMS detects that the aging rate of the battery reaches the set threshold, the charging mode is adjusted.

As shown in FIG. 1 , an embodiment of the invention relates to a battery charging method, including:

Step S101, before charging, obtaining an aging rate of the battery; wherein, the aging rate of the battery refers to a ratio between the battery capacity from the last time of the battery to the full charge and the standard capacity of the battery;

The BMS will automatically save the battery capacity from the last time the battery was never charged to the full charge, and the standard battery capacity refers to the capacity of the battery when it is shipped from the factory. For example, a lithium-ion battery, the standard battery capacity of the factory is 3000mAh; the current battery capacity is 2800mA/93=93% when the battery capacity is from 2800mAh.

In addition, in some cases, it is necessary to perform fast charging to meet the needs of the equipment. In this case: before obtaining the aging rate of the battery, it also includes:

It is judged whether or not rapid charging is performed, and if so, charging is performed according to the maximum charging current, and if not, the aging rate of the battery is obtained.

In step S102, the battery is charged according to a charging mode corresponding to the aging rate of the battery.

In this step, different thresholds are set in advance, and the aging rate of the battery is divided into different sections, and each section corresponds to a charging mode, as follows:

When the aging rate of the battery is greater than the first threshold, charging is performed according to the first charging current;

When the aging rate of the battery is less than or equal to the first threshold and greater than the second threshold, charging is performed according to the second charging current; wherein the second charging current is greater than the first charging current;

As shown in FIG. 2, an embodiment of the present invention further relates to a battery charging apparatus for implementing the above method, including:

The aging rate obtaining module 201 is configured to obtain an aging rate of the battery before charging; wherein the aging rate of the battery refers to the battery capacity and the battery standard capacity of the battery from the last time to the full charge. The ratio between the aging rate acquisition module 201 may be a BMS monitoring sub-module inside the power management module, or may be a BMS monitoring sub-module integrated in the battery module;

The power management module 202 is configured to charge the battery according to a charging manner corresponding to an aging rate of the battery.

The power management module 202 is also configured to:

Determining whether to perform fast charging before the aging rate acquisition module acquires the aging rate of the battery; if yes, charging according to the maximum charging current; if not, obtaining the aging rate of the battery by the aging rate acquiring module;

Two specific embodiments are given below for a detailed description:

Embodiment 1: As shown in FIG. 3, it is mainly applied to a portable terminal device. The charging control circuit and the BMS monitoring circuit of the device are integrated on the main board; the specific implementation is as follows:

The adapter 304 charges the battery module 301 through the power management module 303. At the same time, the BMS monitoring sub-module inside the power management module 303 records the capacity monitoring of the battery after each charging, and the main chip 302 displays the entire charging process, when the BMS monitoring sub-module When the aging of the battery capacity reaches a preset threshold, the SPMC/SSBI reports the main chip, and the main chip 302 controls the input current of the chip of the power management module 303 to reduce the charging current. There are two ways to reduce the charging current:

1. It does not limit the input current and only limits the charging current. This method consumes a lot of power.

2. Limit the input current. This method forces the charging current to decrease. The disadvantage of this method will reduce the battery power to a certain extent.

The appropriate solution can be selected according to the definition of the product, and this solution is not applicable to the terminal device of the detachable battery.

Embodiment 2: As shown in FIG. 4, it is mainly applicable to a rechargeable battery that needs to be removed, such as an electric bicycle and an electric vehicle, and the battery can be removed, and a charging interface is disposed on the battery module; the specific implementation is as follows: the adapter 404 is opposite to the battery module 401. When charging, the battery module 401 is embedded with the power management sub-module 402 and the BMS monitoring sub-module 403. When the adapter 404 charges the battery module 401, the BMS monitoring sub-module 403 collects the aging degree of the battery, when the battery aging rate reaches a preset state. At the threshold, the data is reported to the power management sub-module 402 to limit the current input in time. There are also two methods for limiting the current in the same manner as in the first embodiment, but for safety considerations, it is recommended to adopt the second scheme to directly limit the input current.

The advantage of this solution is that the BMS is always integrated with the battery, storing battery life information and operability.

FIG. 5 is a flowchart of a method for dynamically adjusting a charging mode according to the present invention, as shown in FIG. 5, and according to related contents in FIG. 3 and FIG. 4, the specific process is as follows:

S501: Insert the adapter check. At this time, the charger type is detected. The charger type includes 9V, 3A, 5V, 1.5A, and the output current is 9V. The charger of 3A can also output 5V and 1.5A. The detection of this step is mainly to determine whether the subsequent charging mode is satisfied for charging.

S502: When the adapter type satisfies the requirement, it is determined whether to perform fast charging, if yes, go to step S511, if no, go to step S503.

S503: If smart charging is performed (the charging mode is adjusted according to the battery aging rate), the data stored in the BMS is viewed, and the operation in step S504 is performed according to the data of the BMS. In this step, the data battery viewed is never charged until it is full of the charged battery capacity.

S504: determining whether the aging rate of the battery is greater than 95%, and if yes, proceeding to step S510, if not, Then, go to step S505.

S505: Determine whether the aging rate of the battery is greater than 90%. If yes, go to step S509, if no, go to step S506.

S506: It is judged whether it is greater than 80%. If yes, the process goes to step S507, and if no, the process goes to step S508.

S507: Switch to 0.5C charging, and go to step S512.

S508: Using 1C charging, go to step S512.

S509: charging using 1.5C, and going to step S512.

S510: Using 2C charging, go to step S512.

S511: directly charge with a large current, perform fast charging, and go to step S512.

S512: The power management module charges the battery, and continuously monitors the charged capacity, and returns to step S502.

According to the variation of the characteristics of the lithium ion battery, the embodiment of the invention adjusts the charging mode in real time, and adjusts the charging scheme in time according to the aging degree of the battery to maximize the service life of the lithium ion battery.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Realize A means of function specified in a flow or a flow and/or a block diagram of a block or blocks.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

While the preferred embodiments of the present invention have been disclosed for purposes of illustration, those skilled in the art will recognize that various modifications, additions and substitutions are possible, and the scope of the invention should not be limited to the embodiments described above.

Claims

A battery charging method, the method comprising:

Before charging, obtain the aging rate of the battery; wherein, the aging rate of the battery refers to the ratio between the battery capacity from the last time the battery is discharged to the full capacity of the battery and the standard capacity of the battery;

The battery is charged in accordance with a charging method corresponding to the aging rate of the battery.
The battery charging method according to claim 1, wherein the method further comprises: before acquiring an aging rate of the battery:

Make sure not to charge quickly.
The battery charging method according to claim 1 or 2, wherein the charging the battery according to a charging mode corresponding to an aging rate of the battery comprises:

When the aging rate of the battery is greater than the first threshold, charging is performed according to the first charging current.
The battery charging method according to claim 3, wherein when the aging rate of the battery is less than or equal to a first threshold and greater than a second threshold, charging is performed according to a second charging current; wherein the second charging current is greater than The first charging current.
The battery charging method according to claim 4, wherein when the aging rate of the battery is less than or equal to a second threshold and greater than a third threshold, charging is performed according to a third charging current; wherein the third charging current is greater than The second charging current;

When the aging rate of the battery is less than or equal to a third threshold, charging is performed according to a fourth charging current; wherein the fourth charging current is greater than the third charging current.
A battery charging device, the device comprising:

The aging rate acquisition module is configured to obtain the aging rate of the battery before charging; wherein, the aging rate of the battery refers to a ratio between the battery capacity from the last time the battery is no longer charged to the full charge and the standard capacity of the battery;

The power management module is configured to charge the battery according to a charging manner corresponding to an aging rate of the battery.
The battery charging device according to claim 6, wherein the power management module is further configured to: when the fast charging is not performed, trigger the aging rate acquisition module to acquire an aging rate of the battery.
The battery charging device according to claim 6 or 7, wherein the power management module is configured to:

When the aging rate of the battery is greater than the first threshold, charging is performed according to the first charging current.
The battery charging device of claim 8, wherein the power management module is further configured to:

When the aging rate of the battery is less than or equal to the first threshold and greater than the second threshold, charging is performed according to the second charging current; wherein the second charging current is greater than the first charging current.
The battery charging device of claim 9, wherein the power management module is further configured to:

When the aging rate of the battery is less than or equal to the second threshold and greater than the third threshold, charging is performed according to the third charging current; wherein the third charging current is greater than the second charging current;

When the aging rate of the battery is less than or equal to a third threshold, charging is performed according to a fourth charging current; wherein the fourth charging current is greater than the third charging current.
A computer storage medium comprising a set of instructions that, when executed, cause at least one processor to perform the battery charging method of any one of claims 1 to 5.