Power supply system

A technology of power supply system and battery, applied in the field of power supply system, can solve the problems of inability to eliminate the deformation of unit cells, failure of electric equipment, etc., and achieve the effect of reducing the risk of deformation and high safety.

Inactive Publication Date: 2010-08-25
PANASONIC CORP
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0008] However, if the first method is adopted, there is a possibility that the constant-voltage charger supplies excessive current to the above-mentioned electric equipment, causing these electric equipment to fail.
In addition, if the second method is adopted, the heat generated when the resistance consumes current will increase the ambient temperature of the above-mentioned secondary battery, so the possibility of deformation of the unit cell cannot be eliminated.

Method used

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Embodiment Construction

[0023] Hereinafter, specific embodiments of the present invention will be described using the drawings.

[0024] FIG. 1 is a block diagram showing the configuration of the power supply system according to this embodiment.

[0025] As shown in FIG. 1, the power supply system 40 includes a generator 1 and a battery assembly 20. The generator 1 is a device for charging the battery assembly 20, and is, for example, a generator of a constant voltage specification that is mounted on a vehicle and generates power by the rotational motion of an engine. The battery assembly 20 includes a first assembled battery 2a connected in series with a plurality of (4 in the structure of FIG. 1) unit cells α (first unit cell) and a plurality of (12 in the structure of FIG. 1) connected in series. ) The second assembled battery 2b of the unit cell β (second unit cell), the first assembled battery 2a and the second assembled battery 2b are connected in parallel. A charging current is supplied from the ...

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Abstract

A power supply system includes: a cell assembly formed by a first cell set having a plurality of first element cells connected in series and a second cell set having a plurality of second element cells connected in series; and a generator for charging the cell assembly. The cell assembly is set so that an average voltage V1 as a terminal voltage when the charge capacitance of the first cell set is half of a full charge capacitance is smaller than an average voltage V2 as a terminal voltage when the charge capacitance of the second cell set is half of a full charge capacitance. The first cell set is connected to a resistor in series.

Description

Technical field [0001] The present invention relates to a power supply system composed of a battery assembly combining a plurality of unit cells. More specifically, it relates to a technique for making the battery assembly function as a power source without overcharging the battery as a secondary battery . Background technique [0002] Nickel-hydrogen battery (nickel-hydrogen battery) or nickel-cadmium battery (nickel-cadmium battery) and other alkaline batteries, as well as lithium ion secondary battery (lithium ion secondary battery) or lithium-polymer secondary battery (lithium-polymer secondary battery), etc. Non-aqueous electrolyte secondary batteries have higher energy density per unit weight than lead storage batteries, so they are attracting attention as a power source for vehicles, portable equipment, and other mobile objects. In particular, if a plurality of unit cells using non-aqueous electrolyte secondary batteries are connected in series to form a battery assembly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/10H01M10/44H02J7/02H02J7/34
CPCY02E60/124Y02E60/122H01M10/345Y02T10/7011Y02T10/7055H02J7/0013H02J7/0022H01M10/052H01M10/30H01M10/24H01M10/441Y02T10/70Y02E60/10H01M10/482H01M10/4207H02J7/34H01M4/525H02J7/0024
Inventor 杉山茂行青木护铃木刚平
Owner PANASONIC CORP
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