High-voltage detection circuit, circuit sampling unit, detector, battery device, carrying tool and power supply device

Abstract

The embodiment of the invention provides a high-voltage detection circuit, a circuit sampling unit, a detector, a battery device, a carrying tool and a power supply device and belongs to the technicalfield of batteries. The high-voltage detection circuit comprises a pre-charging circuit used for outputting battery power energy to the outside world through an outer side contact, and a processor used for collecting the real-time voltage of the outer side contact. On the basis of the high-voltage detection circuit, the parasitic capacitance value can be obtained through the method as follows: the pre-charging circuit is powered on, and at least three real-time voltages of the outer side contact are collected through the processor; and according to the at least three real-time voltages, the parasitic capacitance value is obtained through the processor. Therefore, according to the technical scheme, whether a main charging circuit is powered on or not can be judged according to the magnitude of the parasitic capacitance value, the situation that the main charging circuit is powered on when the parasitic capacitance value is too large is eradicated fundamentally, damage to a switch in the main charging circuit is avoided, and the safety of a battery is improved.

Description

【Technical field】 [0001] The invention relates to the technical field of batteries, in particular to a high-voltage detection circuit, a current sampling unit, a detector, a battery device, a vehicle and a power supply device. 【Background technique】 [0002] In recent years, electric vehicles have developed rapidly as an important part of the new energy field. At the same time, the safety of vehicle batteries has become one of the problems hindering the rapid development of electric vehicles. When the on-board battery is connected to an external device (such as a charging pile) through the main charging circuit, there may be a large residual pulse current due to the existence of excessive parasitic capacitance. The pulse current flows through the main charging circuit. If the pulse current is too large, the main Damage to the switch of the charging circuit will cause continuous impact on the vehicle battery and cause serious safety problems. [0003] At present, in order to...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, when the parasitic capacitance is too large due to charging failure or other reasons, the parasitic capacitance may not be fully charged within the aforementioned specified time

If the main charging circuit is turned on at this time, it will inevitably cause damage to the switch in the main charging circuit, which will further bring serious safety problems to the vehicle battery.

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