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Power supply device

一种电源装置、电路的技术，应用在电路装置、电池电路装置、电路等方向，能够解决过放电、电池电压不平衡、电池过充电等问题

Inactive Publication Date: 2012-10-24
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, the unbalance of battery voltage causes overcharging or overdischarging of a specific battery

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0029] exist Figure 1 ~ Figure 3 , represents the power supply device 100 according to Embodiment 1 of the present invention. In these figures, figure 1 is a block diagram of a power supply system using the power supply device 100, figure 2 is to carry out figure 1 A block diagram of the form of the equalization operation of the battery cell 10, image 3 Indicates the composition figure 1A block diagram of a battery pack 20 of battery cells 10 . The power supply system shown in these figures includes a power supply device 100, a load LD, and a charging power supply CP. This power supply device 100 drives the load LD after being charged by the charging power supply CP. Therefore, the power supply device 100 includes a charging mode, a discharging mode, and a balancing mode for balancing the battery cells 10 described later. The load LD and the charging power supply CP are connected to the power supply device 100 via the discharge switch DS and the charging switch CS...

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PUM

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Abstract

Provided is a power supply device wherein changes corresponding to the installation site and environment thereof can be made. The power supply device is provided with a first equalization circuit (14) for suppressing variations in the remaining battery capacities of a plurality of battery units (10), and a second equalization circuit (24) for suppressing variations in the remaining battery capacities of series-connected battery packs (20) which compose each of the battery units (10). The first equalization circuit (14) is provided with a first limiting resistor (15) which connects each of the battery units (10) to an output line (OL), and a first series circuit configured by a first equalization switch (16). The variations in the remaining battery capacities of the battery units (10) are equalized by the first equalization circuit (14), and the variations in the remaining battery capacities of the battery packs (20) which compose each of the battery units (10) are suppressed by the second equalization circuit (24).

Description

technical field [0001] The present invention mainly relates to a power supply device including a large-capacity battery pack that increases both output voltage and output current. Background technique [0002] In a power supply device that increases both output voltage and output current, a plurality of batteries are connected in series to increase the voltage. The power supply device charges the batteries connected in series with the same charging current, or discharges the batteries connected in series with the same current. Therefore, if all the batteries have the same characteristics, there will be no imbalance in battery voltage or remaining capacity. In reality, however, it is impossible to manufacture batteries with all the same characteristics. The imbalance of the battery becomes the imbalance of voltage or remaining capacity when charge and discharge are repeated. Furthermore, the imbalance of the battery voltage causes overcharging or overdischarging of a speci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H01M10/42H02J7/02
CPCY02E60/12H01M10/465H02J7/0016H01M10/425H01M10/441Y02E60/10
Inventor 山口昌男玉井干隆饲手治板垣真一小林雅幸山本洋由
Owner SANYO ELECTRIC CO LTD
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