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Charging/discharging control circuit and battery device provided with the same

A charge and discharge control, electrical control signal technology, applied in the direction of battery circuit devices, circuit devices, battery disconnection circuits, etc.

Pending Publication Date: 2019-04-23
SEIKO INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In the factory inspection of a product connected to a non-removable load, when the voltage of the positive power supply terminal VDD is virtually lowered by turning on the switch 56 to bring the battery device 50 into a power-off state, even if the discharge control FET 52 is turned off, When the capacitance of the load is large, it may take a long time until the voltage of the external negative voltage input terminal VM exceeds the power-down voltage

Method used

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  • Charging/discharging control circuit and battery device provided with the same
  • Charging/discharging control circuit and battery device provided with the same
  • Charging/discharging control circuit and battery device provided with the same

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Embodiment Construction

[0021] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0022] figure 1 It is a block diagram showing the battery device 10 according to the embodiment of the present invention.

[0023] The battery device 10 of this embodiment includes a secondary battery SC, a charge and discharge control circuit 11, a discharge control FET 12, a charge control FET 13, resistors 14 and 15, a switch 16, an external positive terminal EB+ connected to a load or a charger, and an external negative terminal. Terminal EB-.

[0024] Charge and discharge control circuit 11 has overcharge detection circuit 111, overdischarge detection circuit 112, control circuit 113, pull-up detection circuit 114, overdischarge latch circuit 115, logic circuit 116, positive power supply terminal VDD and negative power supply terminal VSS, discharge Control terminal DO, charging control terminal CO and external negative voltage input terminal VM.

[0025] One e...

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PUM

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Abstract

There are provided a charge / discharge control circuit and a battery apparatus having the same. The charge / discharge control circuit includes an overdischarge latch circuit providing an overdischarge latch signal, based on a discharge control signal supplied thereto and a voltage of an external negative voltage input terminal (VM), and a logic circuit supplied with an overdischarge detection signaland the overdischarge latch signal and providing the overdischarge detection signal to a control circuit while receiving the overdischarge latch signal, to thereby enable the power supply to the loadto stop in a short processing time.

Description

technical field [0001] The present invention relates to a charge and discharge control circuit and a battery device having the charge and discharge control circuit. Background technique [0002] In general, a battery device is configured to include a charge and discharge control circuit that detects overcharge, overdischarge, etc., and controls charge and discharge of the secondary battery to protect the secondary battery. In addition, when overdischarge is detected, it has a power down function that prohibits discharge to the load and reduces the internal consumption current of the charge and discharge control circuit. [0003] image 3 A block diagram of a conventional battery device 50 is shown. The battery device 50 has a secondary battery SC, a charge and discharge control circuit 51 connected to the secondary battery SC, a discharge control FET (Field Effect Transistor) 52, a charge control FET 53, an external positive terminal EB+, and an external negative terminal E...

Claims

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Application Information

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IPC IPC(8): H02J7/00
CPCH02J7/0026H02J7/0031H02J7/0036H02J7/0068H02J7/00306H02J7/00302Y02E60/10G01R31/382H02J7/00712
Inventor 阿部谕小野贵士
Owner SEIKO INSTR INC