Battery connection device health status detection system and method, and unmanned aerial vehicle

Patent metadata

Field	Value
Publication number	US-2021249868-A1
Application number	US-202117242269-A
Country	US
Kind code	A1
Filing date	Apr 27, 2021
Priority date	Oct 30, 2018
Publication date	Aug 12, 2021
Grant date	—

Abstract

A detection system includes a control circuit, a control system, and a detection circuit. The control circuit is configured to control on-off of a battery cell. An input end of the control circuit is configured to be connected to the battery cell, and an output end of the control circuit is configured to be connected to a battery connection device. The control system is configured to be connected to the battery connection device and to control the battery cell to supply power to the control system via the battery connection device. The detection circuit is connected to the control circuit or the control system and is configured to detect a parameter value of the battery connection device. The control circuit or the control system is further configured to determine health status of the battery connection device according to the parameter value of the battery connection device.

First claim

What is claimed is:

1 . A detection system comprising:
a control circuit configured to control on-off of a battery cell, an input end of the control circuit being configured to be connected to the battery cell, and an output end of the control circuit being configured to be connected to a battery connection device; a control system configured to be connected to the battery connection device and to control the battery cell to supply power to the control system via the battery connection device; and a detection circuit connected to the control circuit or the control system and configured to detect a parameter value of the battery connection device; wherein the control circuit or the control system is further configured to determine health status of the battery connection device according to the parameter value of the battery connection device.

2 . The detection system of claim 1 , wherein:
the battery connection device includes a pair of connectors including:
a power supply side connector configured to be connected to the output end of the control circuit; and
a power receiving side connector configured to be connected to the control system;
the detection circuit is configured to detect a parameter value of the pair of connectors; and the control circuit or the control system is further configured to determine health status of the pair of connectors according to the parameter value of the pair of connectors.

3 . The detection system of claim 2 , wherein:
the pair of connectors is one of a plurality of pairs of connectors of the battery connection device; the detection circuit is further configured to detect a parameter value of at least one of the plurality of pairs of connectors; and the control circuit or the control system is further configured to determine health status of the at least one of the plurality of pairs of connectors according to the parameter value of the at least one of the plurality of pairs of connectors.

4 . The detection system of claim 3 , wherein the plurality of pairs of connectors include:
a pair of a power supply side positive connector and a power receiving side positive connector; and a pair of a power supply side negative connector and a power receiving side negative connector.

5 . The detection system of claim 2 , wherein:
the parameter value is one of a plurality of parameter values of the battery connection device detected by the detection circuit, the plurality of parameter values including a voltage at the power supply side connector, a voltage at the power receiving side connector, and a current flowing through the power supply side connector and the power receiving side connector; and the control circuit or the control system is further configured to obtain a connector impedance of the power supply side connector and the power receiving side connector according to the plurality of parameter values, and determine the health status of the battery connection device according to the connector impedance.

6 . The detection system of claim 5 , wherein the control circuit or the control system is further configured to:
determine whether the connector impedance exceeds a threshold value; and in response to determining that the connector impedance exceeds the threshold value:
determine that health status of the power supply side connector and the power receiving side connector is poor; and
issue a flight prohibition prompt message.

7 . The detection system of claim 5 , wherein the control circuit or the control system is further configured to:
obtain a connector temperature of the power supply side connector and the power receiving side connector according to the connector impedance; determine whether the connector temperature exceeds a threshold value; and in response to determining that the connector temperature exceeds the threshold value: determine that health status of the power supply side connector and the power receiving side connector is poor; and issue a flight prohibition prompt message.

8 . The detection system of claim 5 , wherein:
the plurality of parameter values include a plurality of sets of parameter values; and the control circuit or the control system is further configured to:
obtain a plurality of impedance sampling values according to the plurality of sets of parameter values; and
filter the plurality of impedance sampling values to obtain the connector impedance.

9 . The detection system of claim 5 , wherein the control circuit or the control system is further configured to determine the health status of the battery connection device at a future moment according to values of the connector impedance at a plurality of past moments.

10 . An unmanned aerial vehicle comprising:
a battery connection device; a battery including:
a battery cell; and
a control circuit configured to control on-off of the battery cell, an input end of the control circuit being connected to the battery cell, and an output end of the control circuit being connected to the battery connection device;
a vehicle body including a control system connected to the battery connection device, the control system being configured to control the battery cell to supply power to the control system via the battery connection device; and wherein:
the battery further includes a detection circuit connected to the control circuit or the vehicle body further includes the detection circuit connected to the control system;
the detection circuit is configured to detect a parameter value of the battery connection device; and
the control circuit or the control system is further configured to determine health status of the battery connection device according to the parameter value of the battery connection device.

11 . The unmanned aerial vehicle of claim 10 , wherein:
the battery connection device includes a pair of connectors including a power supply side connector and a power receiving side connector; the battery includes the detection circuit, the detection circuit being connected to the power supply side connector via a wire to detect a voltage at the power supply side connector and a current flowing through the power supply side connector and the power receiving side connector; the power supply side connector and the power receiving side connector include:
a power supply pin connected to the output end of the control circuit and the control system; and
a detection pin, one end of the detection pin being connected to the power receiving side connector, and another end of the detection pin being connected to the detection circuit;
the battery cell is configured to supply power to the control system via the power supply pin; and the detection circuit is further configured to detect a voltage at the power receiving side connector via the detection pin.

12 . The unmanned aerial vehicle of claim 10 , wherein:
the battery connection device includes a pair of connectors including a power supply side connector and a power receiving side connector; the vehicle body includes the detection circuit, the detection circuit being connected to the power receiving side connector via a wire to detect a voltage at the power receiving side connector; the power supply side connector and the power receiving side connector include:
a power supply pin connected to the output end of the control circuit and the control system; and
a detection pin, one end of the detection pin being connected to the power supply side connector, and another end of the detection pin being connected to the detection circuit;
the battery cell is configured to supply power to the control system via the power supply pin; a

Assignees

• Sz Dji Technology Co Ltd

Inventors

• Lan Qiu

Classifications

• H02J7/855

  with circuits adapted for supplying loads from the battery · CPC title

• H02J7/84 Primary

  Control of state of health [SOH] · CPC title

• B60L3/0023 Primary

  Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train · CPC title

• B60L2270/145

  Structure borne vibrations · CPC title

• B60L2200/10

  Air crafts · CPC title