Method and circuit for battery detection
A charging circuit and discharging circuit technology, applied in the field of battery detection, can solve problems such as rising, circuit damage, and inability to open the charging circuit for a long time
Active Publication Date: 2016-07-20
ACTIONS ZHUHAI TECH CO
View PDF4 Cites 7 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
If the device is not connected to the battery or is in a short-circuit state, but the charging circuit inside the device is still turned on, the output current generated by the charging circuit will cause the voltage at the output end of the charging circuit to rise rapidly, thereby forming heat energy and voltage at the output end of the charging circuit. , which may cause damage to the entire circuit, therefore, if the device is not connected to the battery or the battery is short-circuited, the charging circuit cannot be turned on for a long time
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0056] Embodiments of the present invention provide a method and circuit for detecting a battery. It is suitable for terminals powered by lithium batteries, such as computers, Pads, etc. When the terminal is plugged into the power adapter, if there is a battery in the terminal, the charging circuit needs to be turned on to charge the battery. If there is no battery in the terminal, the charging circuit needs to be turned off to avoid damaging the battery circuit. Based on this, the method provided by the embodiment of the present invention can accurately determine the state of the battery, thereby providing a basis for the next processing procedure.
[0057] In specific implementation, the battery circuit generally includes a battery cell and a protection board, and the protection board can realize protection functions for the battery cell, such as conventional overcharge protection, overdischarge protection, short circuit protection, and overcurrent protection.
[0058] Over...
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
Login to View More Abstract
The embodiment of the invention relates to the field of a circuit, in particular to a method and a circuit for battery detection, which is used for accurately detecting a battery state. The method disclosed by the embodiment of the invention comprises the following steps of discharging a battery circuit, detecting a first voltage of the battery circuit, and judging that the battery exists if the first voltage is greater than a first threshold value; otherwise judging the battery is in a first pending state, controlling a charging circuit to charge the battery circuit, judging the battery is in a second pending state after the charging circuit is controlled to charge the battery circuit, controlling a discharging circuit to discharge the battery circuit, and detecting a second voltage of the battery circuit; and judging that the battery does not exist if the second voltage is smaller than a second threshold value, otherwise judging that the battery exists. The non-existence state of the battery and the state that the battery exists and is in short-circuit protection state can be distinguished by the processes of discharging, charging and discharging again, and thus, the problem that the two states are confused only by discharging or charging is prevented.
Description
technical field [0001] The invention relates to the field of circuits, in particular to a method and circuit for detecting batteries. Background technique [0002] In daily life, when a device powered by a lithium battery, such as a mobile phone or a tablet computer, is plugged into an adapter, it is necessary to determine whether the device is connected to a battery. If the device is connected with a battery, the charging circuit inside the device is turned on, the battery is charged through the adapter, and the charging circuit is turned off when the battery is fully charged. If the device is not connected to the battery or is in a short-circuit state, but the charging circuit inside the device is still turned on, the output current generated by the charging circuit will cause the voltage at the output end of the charging circuit to rise rapidly, thereby forming heat energy and voltage at the output end of the charging circuit. , which may cause damage to the entire circu...
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
Login to View More IPC IPC(8): H02J7/00H01M10/44
CPCY02E60/10
Inventor 肖丽荣
Owner ACTIONS ZHUHAI TECH CO