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Charging control circuit, battery driven apparatus, charging apparatus, and charging method

一种充电控制、电池驱动的技术，应用在充电控制电路领域，能够解决铅蓄电池寿命特性下降、充电不足等问题

Inactive Publication Date: 2012-10-10
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, it is known that a lead-acid battery is used as the main power source of a special electric vehicle that basically does not have an auxiliary power source. When charging and discharging are repeated, unlike a vehicle with an auxiliary power source, the charging method that considers rapid charging as shown in Patent Document 1 may sometimes fail. Insufficient charging will cause the life characteristics of lead-acid batteries to decrease

Method used

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  • Charging control circuit, battery driven apparatus, charging apparatus, and charging method
  • Charging control circuit, battery driven apparatus, charging apparatus, and charging method
  • Charging control circuit, battery driven apparatus, charging apparatus, and charging method

Examples

Experimental program
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Embodiment approach

[0028] Next, preferred embodiments of the present invention will be described with reference to the drawings.

[0029] figure 1 It is a block diagram showing when an electric vehicle according to an embodiment of the present invention is connected to a charging device. figure 1 The illustrated electric vehicle 1 includes a lead storage battery 10 , a power switch 11 , a load 20 , and a charging control circuit 30 according to an embodiment of the present invention. The lead storage battery 10 supplies electric power to each part of the electric vehicle 1 . The power switch 11 turns on and off the power of the electric vehicle 1 . The power switch 11 turns on the power of the electric vehicle 1 when the operator inserts the key, for example, and turns off the power when the key is pulled out. The load 20 includes a motor 21 , a display unit 22 , and an electronic control unit (ECU) 23 . The motor 21 functions as a driving source for moving the vehicle. The display unit 22 ...

Embodiment 1-1

[0059] As described above, as in Comparative Example 1-1, two stages of constant current charging were performed after each discharge mode L to N. FIG. However, in Example 1-1, as shown in the above description of the embodiment, the total discharged electric quantity D is divided into the second discharged electric quantity D2 in the drive periods X1 to X4 and the first discharged electric quantity D1 in the rest periods Y1 to Y4. . Furthermore, the charged electric quantity C is the first charged electric quantity C1 obtained by multiplying the first discharged electric quantity D1 by 1.5 which is the first coefficient α, and the second charged electric quantity C2 obtained by multiplying the second discharged electric quantity D2 by 1.1 which is the second coefficient β. Sum to find out. Except for this, charging and discharging were repeated in the same manner as in Comparative Example 1-1. The transition of the discharge capacity measured in the same manner as in Compar...

Embodiment 1-2

[0062] In Example 1-2, compared to Example 1-1, the value of the first coefficient α for calculating the charge electric quantity C in each of the discharge modes L to N is made different from each other. That is, in Embodiment 1-2, the first coefficient α is set to 1.2 during the discharge mode L, the first coefficient α is set to 1.5 during the discharge mode M, and the first coefficient α is set to 1.9 during the discharge mode N. Out of charging capacity C. Except for this, charging and discharging were repeated in the same manner as in Example 1-1. The transition of the discharge capacity measured in the same manner as in Comparative Example 1-1 is also described in Figure 6 middle.

[0063] In addition, regarding the charging conditions, unlike Example 1-1, the larger the calculated value of the first charged electric quantity C1 is, the longer the charging time (charging time T2) of the second stage which is the last stage is.

[0064] Depend on Figure 6 It was cl...

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Abstract

Provided is a charging control circuit (30) that controls a charging unit (3) for charging a lead storage battery (10) to be used for a power supply of a battery driven apparatus (1), and that is provided with: a first acquisition unit (36) for acquiring the total discharging electric-quantity coming from the lead storage battery (10), starting from when the last discharging was completed to when discharging is to be started this time according to a charging-start instruction, by dividing the total discharging electric-quantity into a first discharging electric-quantity that is the amount of electricity discharged by a discharging current the current value of which is less than a prescribed level, and a second discharging electric-quantity that is the amount of electricity discharged by a discharging current the current value of which is equal to or more than the prescribed level; a calculation unit (37) for acquiring a first charging electric-quantity corresponding to the first discharging electric-quantity acquired by the first acquisition unit (36), and a second charging electric-quantity corresponding to the second discharging electric-quantity acquired by the first acquisition unit (36), and acquiring the sum of the first charging electric-quantity and the second charging electric-quantity as a charging electric-quantity necessary for charging the lead storage battery (10); and a charging control unit (34) for controlling the charging of the lead storage battery (10) by the charging unit, on the basis of the charging electric-quantity acquired by the calculation unit.

Description

technical field [0001] The present invention relates to a charging control circuit, a battery-driven device, a charging device and a charging method, and in particular to a suitable charging control circuit, battery-driven device, charging device and charging method for a lead storage battery used as a power source of a device for performing dark current discharge. Background technique [0002] In recent years, lead storage batteries have been attracting attention again as high-performance power sources in industrial fields where it is uneconomical to use expensive lithium-ion secondary batteries due to their improved charge and discharge characteristics. The above-mentioned industrial field is not a field in which lead-acid batteries are used as portable devices, but a field related to special electric vehicles such as electric carts, forklifts, etc., where lead-acid battery bodies or equipment equipped with lead-acid batteries are often recycled. . [0003] The electric v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H01M10/44
CPCH01M10/44Y02T10/7016H01M10/06H02J7/045H02J7/044Y02E60/126H02J7/00716Y02E60/10H02J7/04Y02T10/70
Inventor 室地晴美吉原靖之菊地智哉岛田和幸
Owner PANASONIC CORP
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