Charging device and quality judging device of pack cell

A charging device and quality judgment technology, applied to battery circuit devices, battery charging management, circuit devices, etc., can solve the problems of battery charge and discharge performance degradation, damage to battery reliability, and overcharge, etc., to improve reliability performance, improving reliability and safety, and ensuring safety

Inactive Publication Date: 2011-01-26
TECHNO CORE INT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009]However, if the same charging voltage is applied to a battery pack in which secondary battery cells are connected in series, the secondary One or more of the battery cells exceeds the voltage and falls into overcharge
Therefore, sometimes even if other secondary battery cells are normal, due to one or more secondary battery cells deteriorated due to overcharging, the charging and discharging performance of the battery pack as a whole decreases, impairing the reliability of the battery pack
In order to individually control the voltage value of each secondary battery cell, extremely complicated control is required, which also causes an increase in cost

Method used

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  • Charging device and quality judging device of pack cell
  • Charging device and quality judging device of pack cell
  • Charging device and quality judging device of pack cell

Examples

Experimental program
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Effect test

Embodiment 1

[0039] The charging device 40 of the battery pack 10 in which the secondary battery cells 10 a are connected in series will be described. The battery pack 10 used in this embodiment has ten secondary battery cells 10a connected in series (refer to figure 2 ).

[0040] Such as figure 1As shown, the charging device 40 includes a voltage supply device 41 , a unit voltage value detection device 42 , a charging control device 43 , a current value detection device 44 and a display device 46 .

[0041] The voltage supply means 41 supplies a predetermined charging voltage to the battery pack 10, and the cell voltage value detection means 42 detects a cell voltage value V of each secondary battery cell 10a constituting the battery pack 10. m .

[0042] The charging control device 43 controls the charging voltage supplied to the battery pack 10, the current value detection device 44 detects the current value J flowing in the battery pack 10, and the display device 46 displays the he...

Embodiment 2

[0125] Next, the detector 200 as a quality judging device for judging the quality of the battery pack 10 in which a plurality of secondary battery cells 10a are connected in series will be described.

[0126] Such as Figure 7 As shown, the detector 200 includes a voltage supply device 241 , a unit voltage value detection device 242 , a quality judgment device 243 , a current value detection device 244 , and a display unit 246 .

[0127] The voltage supply device 241 supplies a predetermined external voltage to the battery pack 10 .

[0128] The unit voltage value detection device 242, the current value detection device 244, and the display unit 246 are respectively the same as the above-mentioned embodiment (refer to figure 1 ) The unit voltage value detection device 42, the current value detection device 44, and the display unit 46 have the same configuration, so detailed description is omitted.

[0129] Next, the quality judging means 243 will be described.

[0130] Such...

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Abstract

The present invention provides a charging device and a quality judging device of a pack cell, wherein a charging controller (43) is provided with a maximum value specifying means (62) specifying a maximum value v maxon of a cell voltage value based on a dispersion degree s of a secondary cell (10a), a third judging means (63) judging whether the maximum value vmaxon of the cell voltage value, which is specified by the maximum value specifying means (62), reaches a permitted cell voltage value vc or not, and a charging voltage value change means (64) changing charging voltage applied by a voltage supply means (41) based on a voltage difference between the maximum value vmaxon of the cell voltage value and the permitted cell voltage value vc when the third judging means (63) judges that themaximum value vmaxon of the cell voltage value is larger than the permitted cell voltage value vc. Thereby, reduction of charging / discharging performance at the time of charging the pack cell can be prevented, reliability of the pack cell can be improved and safety of the pack cell can be secured.

Description

technical field [0001] The present invention relates to the technology of a charging device for a battery pack and a quality judgment device for a battery pack, and particularly relates to a battery pack charging device for charging a battery pack in which a plurality of secondary battery cells are connected in series and a battery pack for judging the quality of a battery pack Group quality judgment device. Background technique [0002] Secondary batteries such as nickel-cadmium batteries, nickel-metal hydride batteries, and lithium-ion batteries are batteries that can be used repeatedly by repeating cycles of discharging and charging. [0003] However, if the secondary battery unit is charged many times, the storage capacity of the secondary battery will decrease compared with the initial state due to overcharging or deterioration of the electrolyte and electrode plates of the secondary battery. The deterioration of the battery continues, and eventually the secondary batt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/10G01R31/36H01M10/48
CPCY02E60/12H01M10/482H02J7/0022H01M10/441G01R31/392Y02E60/10H02J7/0013H02J7/0014G01R31/389G01R31/3842H01M2010/4271
Inventor 高冈浩实北村新三热田稔雄
Owner TECHNO CORE INT
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