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Charging method, electronic device and storage medium

A charging method, charging and discharging technology, applied in battery circuit devices, circuit devices, secondary battery charging/discharging, etc., can solve the problems of shortening the time of constant current charging, increasing battery impedance, and prolonging the time of constant voltage charging, etc.

Pending Publication Date: 2021-09-03
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, as the number of charging cycles and the use time of the battery increase, the impedance of the battery increases, which will shorten the time of constant current charging and prolong the time of constant voltage charging of the battery, resulting in the total charging time of the battery getting longer

Method used

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  • Charging method, electronic device and storage medium
  • Charging method, electronic device and storage medium
  • Charging method, electronic device and storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0159] (1) SOC 1 、SOC 2 、SOC 3 The parameter acquisition process of

[0160] Ambient temperature: 25°C;

[0161] Select a fresh battery (take a battery that has undergone 1 charge and discharge cycle as an example, that is, n=1) to obtain the parameter SOC 1 、SOC 2 、SOC 3 , the specific acquisition process is as follows;

[0162] Step 1. Use a constant current of 0.7C to discharge the battery until the battery voltage is 3.0V;

[0163] Step 2. Let the battery stand for 5 minutes;

[0164] Step 3: Use a constant current of 1.0C to charge the battery until the battery voltage reaches the cut-off voltage of 4.2V;

[0165] Step 4. Continue to use a constant voltage of 4.2V to charge the battery until the battery current reaches the cut-off current of 0.5C;

[0166] Step 5. Use a constant current of 0.5C to charge the battery until the battery voltage reaches the cut-off voltage of 4.45V (which can be understood as the charging limit voltage);

[0167] Step 6. Continue to...

Embodiment 2

[0185] (1) SOC 1 、SOC 2 、SOC 3 The parameter acquisition process of

[0186] with the SOC of Example 1 1 、SOC 2 、SOC 3 The parameter acquisition process is the same, the difference is that the SOC 1 、SOC 2 、SOC 3 The specific value of , the specific SOC value is shown in the following table 2:

[0187] Table 2 SOC at the end of each constant current and constant voltage charging stage during the nth charging process

[0188] charging steps SOC at charge cut-off The value of the actual SOC 1.0C constant current charging to 4.2V SOC 1 =52.5%

SOC 1 =53%

4.2V constant voltage charging to 0.5C SOC 2 =66.3%

SOC 2 = 67%

0.5C constant current charging to 4.45V SOC 3 =85.9%

SOC 3 =86%

4.45V constant voltage charging to 0.025C SOC 4 = 100%

SOC 4 = 100%

[0189] (2) Charging process

[0190] The same as the charging process of embodiment 1, the difference is that the SOC set in embodiment 2 is...

Embodiment 3

[0198] It should be noted that Embodiment 3 discloses that a fresh battery is used to obtain corresponding charging parameters.

[0199] (1) SOC 1 、SOC 2 、SOC 3 The parameter acquisition process of

[0200] with the SOC of Example 1 1 、SOC 2 、SOC 3 The parameter acquisition process is the same as the specific value selection.

[0201] (2) Charging process

[0202] The charging process is the same as in Example 1, except that a battery that has been cycled 100 times is used for charging.

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Abstract

A charging method for a battery, comprising the following steps: in the m-th charging and discharging cycle, using a number N of charging sub-stages in sequence to charge a battery, each charging sub-stage comprising a number j of constant current stages and a constant voltage stage, and each constant current stage and the constant voltage stage stopping the charging according to a charge state, wherein the m, N and j are integers and satisfy m>=1, N>=1 and j>=1. The charging method for a battery, the electronic device and the storage medium provided by the present application can shorten the full charging time of the battery, and also can avoid the overcharge phenomenon of the battery.

Description

technical field [0001] The present application relates to the field of battery technology, and in particular to a battery charging method, an electronic device, and a storage medium. Background technique [0002] At present, the commonly used charging method for lithium-ion batteries is to continuously charge the lithium-ion battery to a certain voltage (which can be understood as the charging limit voltage) through a preset constant current, and then charge the lithium-ion battery with a constant voltage at this voltage to full capacity. charging state. In this case, as the number of charging cycles and the use time of the battery increase, the impedance of the battery increases, which will shorten the time of constant current charging and prolong the time of constant voltage charging of the battery, resulting in the total charging time of the battery longer and longer. Contents of the invention [0003] In view of this, it is necessary to provide a charging method, an ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H01M10/44
CPCH02J7/00712H02J7/00302H01M10/44H02J7/00Y02E60/10Y02B40/00
Inventor 关婷朱珊吴飞
Owner NINGDE AMPEREX TECH
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