Charging system and method

Patent metadata

Field	Value
Publication number	US-10277044-B2
Application number	US-201615356856-A
Country	US
Kind code	B2
Filing date	Nov 21, 2016
Priority date	Nov 27, 2015
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

Abstract

A charging system includes a first battery pack having a first capacity, a second battery pack having a second capacity and a charger for charging the first battery pack and the second battery pack. When the first battery pack is charged by the charger at a predetermined charging current I, a first charging time in which the first battery pack reaches a predetermined temperature T is set as a predetermined time t. When the second battery pack is charged by the charger at the predetermined charging current I, and when a second charging time of the second battery pack reaches the predetermined time t, the second battery pack is charged at a lower charging current. The first capacity is less than the second capacity.

First claim

What is claimed is:

1. A charging system, comprising:
a first battery pack having a first capacity;
a second battery pack having a second capacity; and
a charger for charging the first battery pack and the second battery pack,
wherein, when the first battery pack is charged by the charger at a predetermined charging current (I), a first charging time in which the first battery pack reaches a predetermined temperature (T) during charging using the predetermined charging current (I) is set as a predetermined time (t),
wherein, when the second battery pack is charged by the charger at the predetermined charging current (I) and when a second charging time of the second battery pack reaches the predetermined time (t), the second battery pack is charged at a lower charging current,
wherein the first capacity is less than the second capacity, and
wherein, when the first battery pack reaches the predetermined temperature (T) while the first battery pack is being charged by the charger, the charger stops charging the first battery pack.

2. The charging system of claim 1 , wherein, when the first battery pack is charged by the charger, firstly it is charged with a constant current charging and then with a constant voltage charging.

3. The charging system of claim 1 , wherein, when the second battery pack is charged by the charger, firstly it is charged with a higher constant current charging, then with a lower constant current charging, and finally with a constant voltage charging.

4. The charging system of claim 1 , wherein a maximum time in which the charger outputs the predetermined charging current (I) is equal to the predetermined time (t).

5. A charging method, comprising:
charging a first battery pack at a predetermined charging current (I) until the first battery pack reaches a predetermined temperature (T) and recording as a predetermined time (t) an experienced charging time until the first battery reaches the predetermined temperature (T); and
charging a second battery pack at the predetermined charging current (I) for the predetermined time (t) and then charging the second battery pack at a lower charging current less than the predetermined charging current (I),
wherein a first capacity of the first battery pack is less than a second capacity of the second battery pack, and
wherein, when the first battery pack reaches the predetermined temperature (T) during the step of charging the first battery pack, stopping a charging the first battery pack.

6. The charging method of claim 5 , wherein, when charging the first battery pack, firstly applying a constant current charging and then applying a constant voltage charging.

7. The charging method of claim 6 , wherein, when charging the second battery pack, firstly applying a higher constant current charging, then applying a lower constant current charging, and finally applying a constant voltage charging.

8. The charging method of claim 5 , wherein the predetermined time (t) is stored in a charger which is capable of charging the first battery pack and the second battery pack.

Assignees

• Chevron Hk Ltd
• Chervon Hk Ltd

Inventors

• Geng Zheng

Classifications

• H02J7/977

  of the battery · CPC title

• H02J7/485

  with provisions for charging different types of batteries · CPC title

• H02J7/443

  using passive battery identification means, e.g. resistors or capacitors (identification by mechanical connections H02J7/751) · CPC title

• H02J7/92

  with prioritisation of loads or sources · CPC title

• H02J7/731 Primary

  specially adapted for holding portable devices containing batteries (H02J7/751 takes precedence) · CPC title