Unlock instant, AI-driven research and patent intelligence for your innovation.

Battery status monitoring circuit and battery device

A battery status and monitoring circuit technology, applied to battery circuit devices, circuit devices, battery disconnection circuits, etc., can solve the problem of not being able to start discharging again, and achieve the effect of improving convenience

Active Publication Date: 2019-12-31
SII SEMICONDUCTOR CORP
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] That is, when the load impedance is not greater than the impedance of the pull-down circuit 24, the voltage of the overcurrent detection terminal 14 is not lower than the overcurrent detection voltage. Therefore, when the load impedance is not too large, the discharge may not be restarted.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Battery status monitoring circuit and battery device
  • Battery status monitoring circuit and battery device
  • Battery status monitoring circuit and battery device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0026] figure 1 It is a circuit diagram of the battery device of the first embodiment.

[0027] The battery device of the first embodiment is composed of a secondary battery 1, a charge and discharge control switch 2, a battery state monitoring circuit 3, and external terminals 4 and 5.

[0028] The battery state monitoring circuit 3 has a control circuit 22, a pull-down circuit 24, a comparison circuit 25 for overcurrent detection, a comparison circuit 27 for overcurrent release, a reference voltage circuit 26 for overcurrent detection, and a reference voltage circuit for overcurrent release 28. Positive power supply terminal 11, negative power supply terminal 12, charge and discharge control signal output terminal 13, and overcurrent detection terminal 14.

[0029] The positive electrode of the secondary battery 1 is connected to the external terminal 4 and the positive power supply terminal 11, and the negative electrode of the secondary battery 1 is connected to the negative pow...

Embodiment approach 2

[0041] figure 2 It is a circuit diagram of the battery device of the second embodiment.

[0042] The battery state monitoring circuit 3 of the battery device of the second embodiment has a control circuit 22, a pull-down circuit 24, a comparison circuit 25, a comparison circuit 27, a reference voltage circuit 29, a reference voltage circuit 28, a positive power supply terminal 11, a negative power supply terminal 12, Charge and discharge control signal output terminal 13 and overcurrent detection terminal 14.

[0043] The output terminal of the comparison circuit 27 is connected to the control terminal of the reference voltage circuit 29. The reference voltage circuit 29 switches the output voltage based on the signal input to the control terminal. Other circuits and connection relationships are the same as those of the battery device of the first embodiment.

[0044] Next, the operation of canceling the overcurrent detection of the battery device of the second embodiment will be ...

Embodiment approach 3

[0050] Figure 4 It is a circuit diagram of the battery device of the third embodiment.

[0051] The battery state monitoring circuit 3 of the battery device of the third embodiment has a control circuit 22, a pull-down circuit 24, a comparison circuit 25, a comparison circuit 27, a reference voltage circuit 26, a reference voltage circuit 28, a positive power supply terminal 11, a negative power supply terminal 12, Resistor 41, current source 42, charge and discharge control signal output terminal 13, and overcurrent detection terminal 14.

[0052] One end of the resistor 41 is connected to the overcurrent detection terminal 14 and the other end is connected to the first input terminal of the comparison circuit 25. The current source 42 is connected between the resistor 41 and the positive power supply terminal 11. The output terminal of the comparison circuit 27 is connected to the control terminal of the current source 42. The current source 42 switches the output current acc...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention provides a battery state monitoring circuit and a battery device capable of setting low overcurrent release resistance and high in convenience. The battery device has: a first comparison circuit for detecting overcurrent based on a first reference voltage; and a second comparison circuit for outputting an overcurrent release voltage control signal based on a second reference voltage higher than the first reference voltage.

Description

Technical field [0001] The present invention relates to a battery state monitoring circuit and a battery device, and particularly relates to a technology for preventing overcurrent from flowing in a battery or equipment connected to the battery. Background technique [0002] image 3 The circuit diagram of a conventional battery device is shown. The existing battery device is composed of a secondary battery 1, a charge and discharge control switch 2, a charge and discharge protection circuit 3, and external terminals 4 and 5. The charge and discharge protection circuit 3 has a control circuit 22, a pull-down circuit 24, and an overcurrent detection circuit 35. [0003] Next, the operation of the conventional battery device will be described. [0004] The voltage of the overcurrent detection terminal 14 depends on the resistance component of the charge and discharge control switch 2 and the current flowing through the load connected between the external terminal 4 and the external te...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00H02H7/18
CPCH02J7/0031H02J7/0063H02J7/00304H02J7/007182H02H7/18H02H7/00G01R31/36Y02E60/10
Inventor 小野贵士前谷文彦小池智幸
Owner SII SEMICONDUCTOR CORP