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Short circuit detection method and device, and electrical equipment

A short-circuit detection and port detection technology, which is applied in the electronic field, can solve problems such as low safety and device damage, and achieve the effect of improving safety

Pending Publication Date: 2021-06-04
SHENZHEN TOPBAND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the embodiments of the present invention is to provide a short-circuit detection method, aiming to solve the problem of low safety due to the large current generated when there is a short-circuit in the existing battery short-circuit detection, resulting in damage to the devices in the discharge circuit

Method used

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  • Short circuit detection method and device, and electrical equipment
  • Short circuit detection method and device, and electrical equipment
  • Short circuit detection method and device, and electrical equipment

Examples

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Effect test

Embodiment 1

[0060] see figure 1 , is a schematic flow chart of the short circuit detection method provided by the first embodiment of the present invention, and for the convenience of description, only the parts related to the embodiment of the present invention are shown. The short circuit detection method includes:

[0061] Step S11, when it is known that the battery is being discharged, connect the pre-charging circuit between the first pole of the battery and the first pole of the port corresponding to the first pole of the battery, and disconnect the main discharge circuit between the first pole of the battery and the first pole of the port , to enable current-limited operation.

[0062] The above-mentioned battery is discharging, indicating that there is a load connected and power needs to be taken.

[0063] Before supplying power to the load, a pre-charging circuit is first connected, and the pre-charging circuit is set between the first pole of the battery and the first pole of ...

Embodiment 2

[0122] see Figure 4 , is a schematic flowchart of a short circuit detection method provided by the second embodiment of the present invention. For the convenience of description, only the parts related to the embodiment of the present invention are shown. The difference between the second embodiment and the first embodiment is that the detection port The voltage difference between the positive terminal and the negative terminal of the port is different in the way.

[0123] Please combine Figure 5 , Figure 5 It is a topological diagram on which the short circuit detection method proposed in the embodiment of the present invention is implemented, including a main controller, a first drive circuit connected to the main controller and a second drive circuit, connected to the first drive circuit The first switch, the second switch connected to the second drive circuit, the first switch is connected to a current limiting resistor, the current limiting resistor is set between th...

Embodiment 3

[0146] see Figure 6 , is a short-circuit detection device provided by the third embodiment of the present invention. For the convenience of description, only the parts related to the embodiment of the present invention are shown. The short circuit detection device includes: .

[0147] The first control module 61 is used to connect the precharging circuit between the first pole of the battery and the first pole of the port corresponding to the first pole of the battery when it is known that the battery is being discharged, and disconnect the first pole of the battery from the first pole of the port. The main circuit of the discharge between, so that the current limit operation.

[0148] The above-mentioned battery is discharging, indicating that there is a load connected and power needs to be taken.

[0149] Before supplying power to the load, a pre-charging circuit is first connected, and the pre-charging circuit is set between the first pole of the battery and the first po...

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Abstract

The invention is suitable for the technical field of electronics, and provides a short circuit detection method and device, and electrical equipment, and the method comprises the steps: connecting a pre-charging circuit between a first electrode of a battery and a first electrode of a port, and disconnecting a discharging main loop between the first electrode of the battery and the first electrode of the port, so as to achieve the current-limiting operation; after running for a preset time, detecting a voltage difference value between the port positive electrode and the port negative electrode; judging whether the voltage difference value is smaller than a preset voltage difference value; and if yes, detecting that the battery is short-circuited. When the battery is discharged, the pre-charging circuit is connected, the current is limited through the pre-charging circuit, under the condition that the pre-charging circuit is connected, the voltage difference value between the port positive electrode and the port negative electrode is detected, and when short circuit occurs, the pre-charging circuit serves as a load to limit the current, so that large current is not generated, and before the load works, whether short circuit occurs can be detected. Therefore, the safety of the battery is improved.

Description

technical field [0001] The invention belongs to the field of electronic technology, and in particular relates to a short-circuit detection method, device and electrical equipment. Background technique [0002] With the development of electronic technology, more and more products need to use batteries for power supply, and the safety problems caused by battery short circuit are getting more and more attention. [0003] Battery short circuit means that for some reason, the positive and negative terminals of the battery are shorted to each other to form an abnormal path. This path will generate a very large current (I=U / r, r is the internal resistance of the battery), and at the same time cause a lot of heat inside the battery (Q=U*U*t / r), the generated heat and excessive The release of electric energy will cause serious damage to battery life, and even cause burning, explosion, and fire. [0004] The existing battery short-circuit detection mainly detects the main circuit cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/385G01R31/52G01R1/36
CPCG01R31/385G01R1/36
Inventor 不公告发明人
Owner SHENZHEN TOPBAND CO LTD