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Charging system for charging battery pack

A charging system and battery pack technology, applied in battery circuit devices, secondary batteries, passive battery identification, etc., can solve problems such as affecting the service life of battery packs and inappropriate current

Active Publication Date: 2009-08-05
HITACHI KOKI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the charging device incorrectly determines the resistance value of the identification resistor, the charging device will supply an inappropriate current to the battery pack, thereby adversely affecting the service life of the battery pack

Method used

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  • Charging system for charging battery pack
  • Charging system for charging battery pack
  • Charging system for charging battery pack

Examples

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Embodiment Construction

[0016] The following description will explain the charging system 200 according to an embodiment of the present invention, see figure 1 and 2 . figure 1 A circuit diagram of a charging system 200 is shown. The charging system 200 includes a charging device 1 powered by an AC power source P and charging a battery pack 2 .

[0017] The charging device 1 can charge any of different types of battery packs. In this embodiment, the battery pack 2 includes a first-type battery pack 2 and a second-type battery pack 2, the battery cells 2a of which have different configurations. The configuration form of the battery cells 2a refers to the number of battery cells in series and the connection mode of the battery cells in the battery pack: series or parallel, how many battery cells are connected in series, and how many battery cells are connected in parallel. The first and second type battery cells 2a respectively include a single battery cell 2a or a plurality of battery cells 2a, and...

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PUM

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Abstract

A charging system has a battery pack and a charging device. The battery pack has a battery cell and a plurality of identifiers that identify a configuration of the battery cell. The charging device has a charging unit, a signal transmission unit, a reading unit, and a control unit. The charging unit charges the battery pack. The signal transmission unit transmits a first signal and a second signal to the battery pack separately to read the plurality of identifiers when the battery pack is attached to the charging unit. The reading unit reads the plurality of identifiers according to the first and second signals to determine the configuration of the battery cell. The control unit controls the charging unit according to the configuration of the battery cell.

Description

technical field [0001] The present invention relates to a battery pack including a secondary battery such as a lithium ion secondary battery, a charging device for charging the battery pack, and a charging device including the battery pack for charging the battery pack charging system. Background technique [0002] Generally, cordless power tools use a rechargeable secondary battery pack with a charging device as a power source. Lithium-ion (Li-ion) battery cells are commonly used to construct such secondary batteries. A charging device for a lithium-ion type battery pack typically charges the battery pack at a constant charging current and a constant charging voltage. In particular, in order to avoid reverse charging each battery cell, the charging device first charges the battery pack with a constant charging current until the battery voltage reaches a predetermined value, such as 4.2V / cell, and then charges at a constant charging voltage until the current The current t...

Claims

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Application Information

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IPC IPC(8): H02J7/02H02J7/04
CPCY02E60/12H01M10/0525H02J2007/0098H01M10/425Y02B40/90H01M10/441H02J7/0006H01M10/4257H02J7/00038H02J7/00047Y02E60/10
Inventor 荒馆卓央船桥一彦高桥滋
Owner HITACHI KOKI CO LTD
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