Method and device for charging aluminum battery

Patent metadata

Field	Value
Publication number	US-11251638-B2
Application number	US-201916436398-A
Country	US
Kind code	B2
Filing date	Jun 10, 2019
Priority date	Dec 19, 2018
Publication date	Feb 15, 2022
Grant date	Feb 15, 2022

Abstract

A method for charging aluminum batteries includes performing a first charging procedure for the aluminum battery until the voltage of the aluminum battery reaches a set value. The first charging procedure at least includes a first constant-current charging using a first constant current to charge an aluminum battery in a first stage. The range of the first constant current is from 5 C to 100 C, and C (C-rate) refers to a unit of the capacity of the aluminum battery. When the voltage of the aluminum battery reaches the set value, a first constant-voltage charging uses a first constant voltage to charge the aluminum battery. According to the charging current provided by the first constant voltage to the aluminum battery or the charge time for the aluminum battery charged by the first constant voltage, a determination is made to stop the charging process on the aluminum battery.

First claim

What is claimed is:

1. An aluminum battery charging method, comprising:
performing a first charging procedure on the aluminum battery until a voltage of the aluminum battery reaches a set value;
wherein the first charging procedure at least comprises operating a first constant-current charging in a first stage on the aluminum battery by using a first constant current, and the first constant current is 5 C˜100 C, wherein C(C-rate) represents a unit of a capacity of the aluminum battery;
wherein when the voltage of the aluminum battery reaches the set value, performs a first constant-voltage charging on the aluminum battery by using a first constant voltage; and
according to a charging current or a charge time which are caused by the first constant voltage charging the aluminum battery, determines to stop charging the aluminum battery,
wherein a charging-time ratio of a charge time of the first constant-current charging to a charge time of the first constant-voltage charging is 1:4˜1:10; wherein during the charge time of the first constant-current charging and the charge time of the first constant-voltage charging, a capacity ratio of the aluminum battery is 1:0.5˜1:3.

2. The aluminum battery charging method of claim 1 , wherein a charge time of the first stage is equal to a charge time that represents how much time the aluminum battery takes to reach the set value, and the first charging procedure only uses the first constant current to charge the aluminum battery.

3. The aluminum battery charging method of claim 1 , wherein the first charging procedure operates a second constant-current charging or a second constant-voltage charging in a second stage to the aluminum battery by using a second constant current or a second constant voltage, and the first charging procedure operates a third constant-current charging in a third stage on the aluminum battery by using a third constant current.

4. The aluminum battery charging method of claim 3 , wherein when the first charging procedure operates the second stage by using the second constant current or the second voltage current, the second stage is operated between the first constant-current charging and the third constant-current charging, and the second constant current is not equal to the first constant current and the third constant current.

5. The aluminum battery charging method of claim 4 , wherein the second constant current is lower than the first constant current and the third constant current.

6. The aluminum battery charging method of claim 4 , wherein a charge time of the first stage and a charge time of the third stage are 6 seconds to 15 minutes, and a charge time of the second stage does not exceed 30 minutes.

7. The aluminum battery charging method of claim 1 , wherein when the charging current caused by the first constant voltage charging the aluminum battery is reduced to reach a determined current, the aluminum battery charging method is disabled, or when an overall time of charging the aluminum battery reaches a preset time, the aluminum battery charging method is disabled.

8. The aluminum battery charging method of claim 1 , wherein the aluminum battery has a graphitic-powder electrode.

9. An aluminum battery charging device, comprising:
a charger, coupled to the aluminum battery;
a controller, comprising a set value and comparing a voltage of the aluminum battery and the set value to control the charger to perform a first charging procedure;
wherein when the charger performs the first charging procedure, the charger at least operates a first constant-current charging in a first stage to charge the aluminum battery by using a first constant current, and the first constant current is 5 C˜100 C, wherein C(C-rate) represents a unit of a capacity of the aluminum battery;
wherein when the controller detects that the voltage of the aluminum battery reaches the set value, the controller controls the charger to operate a first constant-voltage charging to the aluminum battery by using a first constant voltage; and the controller determines to stop the charger from charging the aluminum battery based on a charging current or a charge time which are caused by the first constant-voltage charging of the aluminum battery,
wherein a charging-time ratio of a charge time of the first constant-current charging to a charge time of the first constant-voltage charging is 1:4˜1:10; wherein during the charge time of the first constant-current charging and the charge time of the first constant-voltage charging, a capacity ratio of the aluminum battery is 1:0.5˜1:3.

10. The aluminum battery charging device of claim 9 , wherein when the charger performs the first charging procedure, the controller controls the charger to selectively operate a second constant-current charging or a second constant-voltage charging in a second stage by using a second constant current or a second constant voltage, and the controller controls the charger to operate a third constant-current charging in a third stage by using a third constant current;
wherein when the charger operates the second constant-current charging or the second constant-voltage charging, the second constant-current charging or the second constant-voltage charging are operated between the first constant-current charging and the third constant-current charging, and the second constant current is different from the first constant current and the third constant current.

11. The aluminum battery charging device of claim 9 , wherein a charge time for the first stage is equal to a charge time that the aluminum battery takes to reach the set value, and the charger only uses the first constant current to charge the aluminum battery.

Assignees

• Ind Tech Res Inst

Inventors

• Chiu Sheng-Cheng
• Chiang Chien-Chih
• Pan Ping-I
• Yang Chang-Chung

Classifications

• H02J7/96

  in response to battery voltage · CPC title

• H02J7/94

  in response to battery current · CPC title

• H01M10/44 Primary

  Methods for charging or discharging (circuits for charging H02J7/00) · CPC title

• H01M10/48

  Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569) · CPC title

• H01M4/587

  for inserting or intercalating light metals · CPC title