WO2018133347A1 - Method and device for detecting short circuit of battery - Google Patents

Abstract

An adhesion detection method and detection device for a contactor, and a battery management system. The method comprises: sending, to a power supply device, instruction information for instructing the power supply device to supply power, wherein the instruction information carries a power supply voltage value (101); detecting a power supply voltage during the process of the power supply device pulling up a voltage according to the power supply voltage value (102); and according to the detected power supply voltage value, determining whether adhesion occurs on a contactor in a power supply loop of the power supply device (103). According to the method, whether adhesion occurs on a contactor in a power supply loop of a power supply device is detected during the process of the power supply device pulling up a voltage according to a power supply voltage value, and therefore the security of the battery management system is improved.

Description

Method and device for detecting short circuit of battery

This application claims the priority of the Chinese Patent Application filed on January 23, 2017, the Chinese Patent Office, Application No. CN201710058485.3, entitled "A Contactor Adhesion Detection Method, Detection Device, and Battery Management System". The entire contents are incorporated herein by reference.

Technical field

The present application relates to the field of contactor detection technologies, and in particular, to a contactor adhesion detection method, a detection device, and a battery management system.

Background technique

In the case where the contactor in the power supply circuit of the power supply device is stuck, the power supply device is used to charge the battery in the battery management system, such as in the case where the contactor in the power supply circuit of the charging post is stuck, the charging pile is used. Charging the battery in the battery management system can cause the contactor in the charging circuit of the battery management system to also be stuck. Therefore, if the contactor in the power supply circuit of the power supply device cannot be determined to be stuck, the power supply device is used. The battery management system is less secure than charging the battery in the battery management system.

Summary of the invention

In view of this, the embodiment of the present application provides a contactor adhesion detecting method, a detecting device, and a battery management system, which are used to solve the problem of low safety of the battery management system in the prior art.

In a first aspect, an embodiment of the present application provides a contactor adhesion detecting method, where the method includes:

Sending, to the power supply device, indication information for instructing the power supply device to perform power supply, wherein the indication information carries a power supply voltage value;

Detecting a supply voltage during a process in which the power supply device pulls up the voltage according to the supply voltage value;

Judging whether the contactor in the power supply circuit of the power supply device is stuck according to the detected power supply voltage value.

The above-mentioned aspect and any possible implementation manner further provide an implementation manner, the step of sending the indication information for instructing the power supply device to supply power to the power supply device, including:

Determining the supply voltage value according to a charging voltage of the battery to be charged;

Encapsulating the supply voltage value into the indication information;

Sending the indication information to the power supply device.

And the step of detecting the power supply voltage in the process of pulling the voltage according to the power supply voltage value according to the aspect and any possible implementation manner, including:

During a process in which the power supply device pulls up the voltage according to the supply voltage value, the supply voltage of the contactor output terminal in the power supply circuit of the power supply device is detected at least twice.

And the step of detecting the supply voltage of the contactor output terminal in the power supply circuit of the power supply device at least twice, including:

The supply voltage between the positive contactor output and the negative contactor output in the power supply circuit of the power supply device is detected at least twice.

And the step of determining, according to the detected power supply voltage value, whether the contactor in the power supply circuit of the power supply device is stuck, according to the aspect and any possible implementation manner, including:

Determining whether the difference between the supply voltage values between the positive contactor output and the negative contactor output in the power supply loop of any two adjacent two of the detected at least two times is greater than or equal to a specified voltage threshold ;

If the difference between the supply voltage values between the positive contactor output and the negative contactor output in the power supply loop of any two adjacent power supply devices is at least equal to or equal to a specified voltage threshold, Determining that the positive electrode contactor and the negative electrode contactor in the power supply circuit of the power supply device are stuck;

If the difference between the supply voltage values between the positive contactor output and the negative contactor output in the power supply loop of any two adjacent power supply devices is less than the specified voltage threshold, determine the The positive contactor and the negative contactor in the power supply circuit of the power supply device are not stuck.

The foregoing aspect and any possible implementation manner further provide an implementation manner, further including:

If it is determined that the contactor in the power supply circuit of the power supply device is stuck, the power supply device is And transmitting indication information for instructing the power supply device to stop power supply.

In an aspect as described above and any possible implementation, an implementation is further provided, the power supply device comprising a charging post.

One of the above technical solutions has the following beneficial effects:

In the embodiment of the present application, before the power supply device is required to provide power, the power supply device needs to generate indication information for indicating that the power supply device performs power supply, wherein the indication information carries a power supply voltage value, and then the power supply device is detected according to the power supply device. The supply voltage value pulls up the voltage during the voltage supply process. Since the power supply device pulls up the voltage according to the supply voltage value, the contactor in the power supply circuit of the power supply device that does not cause the adhesion does not close, and thus the power supply of the power supply device The output of the contactor in the loop does not output a voltage, and the contactor in the power supply device in which the blocking occurs is in a closed state, so that the output of the contactor in the power supply circuit of the power supply device can output a voltage, so the power supply device The value of the power supply voltage detected when the contactor in the power supply circuit is stuck and the value of the power supply voltage detected when the contactor in the power supply circuit of the power supply device is not stuck is different, so the value of the detected power supply voltage can be judged according to the detected power supply voltage value. Whether the contactor in the power supply circuit of the power supply device is stuck or not The battery safety management systems. Moreover, since it is judged whether the contactor in the power supply circuit of the power supply device is stuck or not, the detected power supply voltage value used is a power supply voltage in a process in which the power supply device pulls up the voltage according to the power supply voltage value, that is, the power supply device is in accordance with the power supply voltage. During the process of pulling up the voltage, it is detected whether the contactor in the power supply circuit of the power supply device is stuck. Since the output voltage of the power supply device has not reached the value of the power supply voltage carried in the indication information, the battery management system cannot be charged. The contactor in the circuit is closed, so the output voltage of the power supply device cannot cause the contactor in the charging circuit of the battery management system to be stuck, and in the process of determining whether the contactor in the power supply circuit of the power supply device is stuck, It poses a threat to the security of the battery management system, thus further improving the security of the battery management system.

In a second aspect, an embodiment of the present application provides a contactor adhesion detecting device, where the device includes:

a sending unit, configured to send, to the power supply device, indication information for instructing the power supply device to perform power supply, where the indication information carries a power supply voltage value;

a detecting unit, configured to detect a power supply voltage in a process in which the power supply device pulls a voltage according to the power supply voltage value;

The determining unit is configured to determine, according to the detected power supply voltage value, whether the contactor in the power supply circuit of the power supply device is stuck.

The above-mentioned aspect and any possible implementation manner further provide an implementation manner, where the sending unit is specifically configured to:

Determining the supply voltage value according to a charging voltage of the battery to be charged;

Encapsulating the supply voltage value into the indication information;

Sending the indication information to the power supply device.

The above-mentioned aspect and any possible implementation manner further provide an implementation manner, where the detecting unit is specifically configured to:

During a process in which the power supply device pulls up the voltage according to the supply voltage value, the supply voltage of the contactor output terminal in the power supply circuit of the power supply device is detected at least twice.

The above-mentioned aspect and any possible implementation manner further provide an implementation manner, where the detecting unit is specifically configured to:

The supply voltage between the positive contactor output and the negative contactor output in the power supply circuit of the power supply device is detected at least twice.

The foregoing aspect and any possible implementation manner further provide an implementation manner, where the determining unit is specifically configured to:

Determining whether the difference between the supply voltage values between the positive contactor output and the negative contactor output in the power supply loop of any two adjacent two of the detected at least two times is greater than or equal to a specified voltage threshold ;

If the difference between the supply voltage values between the positive contactor output and the negative contactor output in the power supply loop of any two adjacent power supply devices is at least equal to or equal to a specified voltage threshold, Determining that the positive electrode contactor and the negative electrode contactor in the power supply circuit of the power supply device are stuck;

If the difference between the supply voltage values between the positive contactor output and the negative contactor output in the power supply loop of any two adjacent power supply devices is less than the specified voltage threshold, determine the The positive contactor and the negative contactor in the power supply circuit of the power supply device are not stuck.

The above-mentioned aspect and any possible implementation manner further provide an implementation manner, where the sending unit is further configured to:

If it is determined that the contactor in the power supply circuit of the power supply device is stuck, the indication information for instructing the power supply device to stop the power supply is sent to the power supply device.

In an aspect as described above and any possible implementation, an implementation is further provided, the power supply device comprising a charging post.

One of the above technical solutions has the following beneficial effects:

In the embodiment of the present application, before the power supply device is required to provide power, the power supply device needs to generate indication information for indicating that the power supply device performs power supply, wherein the indication information carries a power supply voltage value, and then the power supply device is detected according to the power supply device. The supply voltage value pulls up the voltage during the voltage supply process. Since the power supply device pulls up the voltage according to the supply voltage value, the contactor in the power supply circuit of the power supply device that does not cause the adhesion does not close, and thus the power supply of the power supply device The output of the contactor in the loop does not output a voltage, and the contactor in the power supply device in which the blocking occurs is in a closed state, so that the output of the contactor in the power supply circuit of the power supply device can output a voltage, so the power supply device The value of the power supply voltage detected when the contactor in the power supply circuit is stuck and the value of the power supply voltage detected when the contactor in the power supply circuit of the power supply device is not stuck is different, so the value of the detected power supply voltage can be judged according to the detected power supply voltage value. Whether the contactor in the power supply circuit of the power supply device is stuck or not The battery safety management systems. Moreover, since it is judged whether the contactor in the power supply circuit of the power supply device is stuck or not, the detected power supply voltage value used is a power supply voltage in a process in which the power supply device pulls up the voltage according to the power supply voltage value, that is, the power supply device is in accordance with the power supply voltage. During the process of pulling up the voltage, it is detected whether the contactor in the power supply circuit of the power supply device is stuck. Since the output voltage of the power supply device has not reached the value of the power supply voltage carried in the indication information, the battery management system cannot be charged. The contactor in the circuit is closed, so the output voltage of the power supply device cannot cause the contactor in the charging circuit of the battery management system to be stuck, and in the process of determining whether the contactor in the power supply circuit of the power supply device is stuck, It poses a threat to the security of the battery management system, thus further improving the security of the battery management system.

In a third aspect, an embodiment of the present application provides a contactor adhesion detecting method, where the method is applied to a battery management system, and the method includes:

Sending a communication handshake message carrying a supply voltage value to the charging post;

Detecting a supply voltage during a process in which the charging post pulls a voltage according to the supply voltage value;

Based on the detected supply voltage value, it is determined whether the contactor in the power supply circuit of the charging post is stuck.

And the step of transmitting the communication handshake message carrying the power supply voltage value to the charging post, including:

Determining the supply voltage value according to a charging voltage of the battery pack in the battery management system;

Encapsulating the supply voltage value into the communication handshake message;

Sending the communication handshake message to the charging stub.

And the step of detecting the supply voltage in the process of pulling the voltage according to the supply voltage value, including:

During a process in which the charging post pulls up the voltage according to the supply voltage value, detecting a supply voltage between the positive contactor input end and the negative contactor input end of the charging circuit of the battery management system at least twice;

The detected supply voltage between the positive contactor input terminal and the negative contactor input terminal of the charging circuit of the battery management system is detected as the positive contactor output terminal and the negative electrode in the power supply circuit of the charging post The corresponding supply voltage between the output of the contactor.

And the step of determining, according to the detected power supply voltage value, whether the contactor in the power supply circuit of the charging post is stuck, according to the aspect and any possible implementation manner, including:

Determining whether the difference between the corresponding supply voltage values between the positive contactor output end and the negative contactor output end in the power supply loop of any two adjacent charging stubs at least twice is greater than or equal to a specified voltage threshold;

If the difference between the power supply voltage values between the positive contactor output terminal and the negative contactor output terminal in the power supply loop of any two adjacent charging stubs at least twice is greater than or equal to a specified voltage threshold, determine The positive contactor and the negative contactor in the power supply circuit of the charging post are stuck;

Determining the charging if the difference between the corresponding supply voltage values between the positive contactor output and the negative contactor output in the power supply loop of any two adjacent charging stubs is less than a specified voltage threshold The positive contactor and the negative contactor in the power supply loop of the pile did not stick.

The foregoing aspect and any possible implementation manner further provide an implementation manner, further including:

If it is determined that the contactor in the power supply circuit of the charging post is stuck, the indication information for instructing the charging pile to stop supplying power is sent to the charging post.

One of the above technical solutions has the following beneficial effects:

In the embodiment of the present application, before the charging pile is required to supply electric energy, the communication handshake message carrying the supply voltage value needs to be sent to the charging post, and then the supply voltage in the process of pulling the voltage according to the supply voltage value is detected. In the process of pulling the voltage according to the value of the supply voltage, the contactor in the power supply circuit of the charging pile that does not stick to the charging pile is not closed, and the output end of the contactor in the power supply circuit of the charging pile does not output a voltage. The contactor in the charging pile in which the adhesion occurs is in a closed state, so that the output end of the contactor in the power supply circuit of the charging post can output a voltage, and thus the power supply detected when the contactor in the power supply circuit of the charging post is stuck. The voltage value is different from the value of the power supply voltage detected when the contactor in the power supply circuit of the charging post is not stuck. Therefore, it can be determined whether the contactor in the power supply circuit of the charging post is stuck according to the detected power supply voltage value. , thereby improving the security of the battery management system. Moreover, since it is judged whether or not the contactor in the power supply circuit of the charging post is stuck, the detected power supply voltage value used is a power supply voltage in a process in which the charging pile pulls up the voltage according to the power supply voltage value, that is, the charging pile is in accordance with the power supply voltage. During the process of pulling up the voltage, it is detected whether the contactor in the power supply circuit of the charging post is stuck. At this time, the output voltage of the charging post has not reached the value of the power supply voltage carried in the communication handshake message, and cannot be made in the battery management system. The contactor in the charging circuit is closed, so the output voltage of the charging post cannot cause the contactor in the charging circuit of the battery management system to be stuck, and in the process of determining whether the contactor in the power supply circuit of the charging post is stuck, It does not pose a threat to the safety of the battery management system, thus further improving the security of the battery management system.

In a fourth aspect, the embodiment of the present application provides a battery management system, where the battery management system includes:

a sending unit, configured to send, to the charging post, a communication handshake message carrying a supply voltage value;

a detecting unit, configured to detect a power supply voltage in a process in which the charging pile pulls a voltage according to the power supply voltage value;

The determining unit is configured to determine, according to the detected power supply voltage value, whether the contactor in the power supply circuit of the charging post is stuck.

The above-mentioned aspect and any possible implementation manner further provide an implementation manner, where the sending unit is specifically configured to:

Determining the supply voltage value according to a charging voltage of the battery pack in the battery management system;

Encapsulating the supply voltage value into the communication handshake message;

Sending the communication handshake message to the charging stub.

The above-mentioned aspect and any possible implementation manner further provide an implementation manner, where the detecting unit is specifically configured to:

During a process in which the charging post pulls up the voltage according to the supply voltage value, detecting a supply voltage between the positive contactor input end and the negative contactor input end of the charging circuit of the battery management system at least twice;

The detected supply voltage between the positive contactor input terminal and the negative contactor input terminal of the charging circuit of the battery management system is detected as the positive contactor output terminal and the negative electrode in the power supply circuit of the charging post The corresponding supply voltage between the output of the contactor.

The foregoing aspect and any possible implementation manner further provide an implementation manner, where the determining unit is specifically configured to:

Determining whether the difference between the corresponding supply voltage values between the positive contactor output end and the negative contactor output end in the power supply loop of any two adjacent charging stubs at least twice is greater than or equal to a specified voltage threshold;

If the difference between the power supply voltage values between the positive contactor output terminal and the negative contactor output terminal in the power supply loop of any two adjacent charging stubs at least twice is greater than or equal to a specified voltage threshold, determine The positive contactor and the negative contactor in the power supply circuit of the charging post are stuck;

Determining the charging if the difference between the corresponding supply voltage values between the positive contactor output and the negative contactor output in the power supply loop of any two adjacent charging stubs is less than a specified voltage threshold The positive contactor and the negative contactor in the power supply loop of the pile did not stick.

The above-mentioned aspect and any possible implementation manner further provide an implementation manner, where the sending unit is further configured to:

If it is determined that the contactor in the power supply circuit of the charging post is stuck, the indication information for instructing the charging pile to stop supplying power is sent to the charging post.

One of the above technical solutions has the following beneficial effects:

In the embodiment of the present application, before the charging pile is required to supply electric energy, the communication handshake message carrying the supply voltage value needs to be sent to the charging post, and then the supply voltage in the process of pulling the voltage according to the supply voltage value is detected. In the process of pulling the voltage according to the value of the supply voltage, the contactor in the power supply circuit of the charging pile that does not stick to the charging pile is not closed, and the output end of the contactor in the power supply circuit of the charging pile does not output a voltage. The contactor in the charging pile where the adhesion occurs will be In the closed state, the output of the contactor in the power supply circuit of the charging post can output a voltage, so that the value of the supply voltage detected when the contactor in the power supply circuit of the charging post is stuck and the power supply circuit of the charging post The value of the power supply voltage detected when the contactor is not stuck is different. Therefore, it can be determined whether the contactor in the power supply circuit of the charging post is stuck according to the detected power supply voltage value, thereby improving the safety of the battery management system. Moreover, since it is judged whether or not the contactor in the power supply circuit of the charging post is stuck, the detected power supply voltage value used is a power supply voltage in a process in which the charging pile pulls up the voltage according to the power supply voltage value, that is, the charging pile is in accordance with the power supply voltage. During the process of pulling up the voltage, it is detected whether the contactor in the power supply circuit of the charging post is stuck. At this time, the output voltage of the charging post has not reached the value of the power supply voltage carried in the communication handshake message, and cannot be made in the battery management system. The contactor in the charging circuit is closed, so the output voltage of the charging post cannot cause the contactor in the charging circuit of the battery management system to be stuck, and in the process of determining whether the contactor in the power supply circuit of the charging post is stuck, It does not pose a threat to the safety of the battery management system, thus further improving the security of the battery management system.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present application. One of ordinary skill in the art can also obtain other drawings based on these drawings without paying for inventive labor.

1 is a schematic flow chart of a contact stick adhesion detecting method provided by an embodiment of the present application;

2 is a schematic flow chart of another contactor adhesion detecting method provided by an embodiment of the present application;

3 is a schematic diagram of connection of a charging post and a battery management system according to an embodiment of the present application;

4 is a schematic structural diagram of a contactor adhesion detecting device according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a battery management system according to an embodiment of the present application.

detailed description

For a better understanding of the technical solutions of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

It should be understood that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. Based on the embodiments in this application, those of ordinary skill in the art are not creative All other embodiments obtained under the premise of the present invention are within the scope of the present application.

The terms used in the embodiments of the present application are for the purpose of describing particular embodiments only, and are not intended to limit the application. The singular forms "a", "the", and "the"

Depending on the context, the word "if" as used herein may be interpreted as "when" or "when" or "in response to determining" or "in response to detecting." Similarly, depending on the context, the phrase "if determined" or "if detected (conditions or events stated)" may be interpreted as "when determined" or "in response to determination" or "when detected (stated condition or event) "Time" or "in response to a test (condition or event stated)".

In the case where the contactor in the power supply circuit of the charging post in the prior art is used for charging, the charging of the battery in the battery management system causes the contactor in the charging circuit of the battery management system to also adhere. The problem of low security of the battery management system is provided. The embodiment of the present application provides a corresponding solution: before using the charging post to charge the battery in the battery management system, detecting whether the contactor in the power supply circuit of the charging post is Adhesion occurs to improve the safety of the battery management system.

Under the guidance of the foregoing, in the embodiment of the present application, before the charging pile is required to provide the electric energy, the charging post needs to generate indication information for indicating the charging of the charging post, wherein the indication information carries the power supply voltage value. And then detecting the power supply voltage during the charging of the charging pile according to the supply voltage value. Since the power supply device pulls up the voltage according to the power supply voltage value, the contactor in the power supply circuit of the power supply device that does not cause blocking does not Closed, so that the output of the contactor in the power supply circuit of the power supply device does not output a voltage, and the contactor in the power supply device where the adhesion occurs is closed, so that the output of the contactor in the power supply circuit of the power supply device can output The voltage, so the value of the supply voltage detected when the contactor in the power supply circuit of the charging post is stuck and the value of the supply voltage detected when the contactor in the power supply circuit of the charging post is not stuck is different, and thus can be detected according to The value of the power supply voltage, determining whether the contactor in the power supply circuit of the charging post is stuck, To improve the safety of the battery management systems. Moreover, since it is judged whether or not the contactor in the power supply circuit of the charging post is stuck, the detected power supply voltage value used is a power supply voltage in a process in which the charging pile pulls up the voltage according to the power supply voltage value, that is, the charging pile is in accordance with the power supply voltage. During the process of pulling up the voltage, it is detected whether the contactor in the power supply circuit of the charging post is stuck, because The output voltage of the charging post has not reached the value of the power supply voltage carried in the indication information, and the contactor in the charging circuit in the battery management system cannot be closed, so the output voltage of the charging pile cannot make contact in the charging circuit of the battery management system. The adhesion occurs in the device, and in the above process of judging whether the contactor in the power supply circuit of the charging post is stuck, the safety of the battery management system is not threatened, thereby further improving the safety of the battery management system.

The possible implementations are described in detail below.

Embodiment 1

As shown in FIG. 1 , a contactor adhesion detecting method provided by an embodiment of the present application may include the following steps:

101. Send, to the power supply device, indication information for instructing the power supply device to perform power supply, where the indication information carries a power supply voltage value.

In a feasible implementation, the indication information for instructing the power supply device to supply power may be sent to the power supply device by determining the power supply voltage value according to the charging voltage of the battery to be charged; The value is encapsulated into the indication information; the indication information is sent to the power supply device.

Specifically, when the power supply device charges the battery to be charged, it is required to provide power according to the charging voltage of the battery to be charged, so that the safety of the battery to be charged can be ensured under the premise of ensuring fast charging of the battery to be charged. Therefore, before the supply voltage value is encapsulated to the indication information, the charging voltage of the battery to be charged needs to be determined, and then the charging voltage is determined as the supply voltage value, and is encapsulated into the indication information, and the indication information is sent to the power supply device. . Wherein, the battery to be charged may include a battery in the battery management system.

It should be noted that, before transmitting the indication information for instructing the power supply device to supply power to the power supply device, the power supply device and the battery management system may be connected, and the contactor in the power supply circuit of the power supply device is determined not to occur. When the power supply device pulls the voltage to the supply voltage value, the battery in the battery management system can be directly charged, thereby achieving the purpose of quickly charging the battery in the battery management system.

102. Detect a power supply voltage in a process in which the power supply device pulls up a voltage according to the power supply voltage value.

Specifically, after receiving the indication information, the power supply device parses the indication information, obtains a power supply voltage value in the indication information, and then supplies the power supply device according to the power supply voltage value. The electric voltage is pulled up from 0V until the supply voltage is pulled up to the supply voltage value, and after the supply voltage is pulled up to the supply voltage value, the contactor in the power supply circuit of the power supply device is closed, and then starts to wait. Recharge the battery for charging. Since the power supply device pulls up the voltage according to the supply voltage value, the contactor in the power supply circuit of the power supply device that does not cause blocking does not close, and thus the output terminal of the contactor in the power supply circuit of the power supply device does not output voltage, and The contactor in the power supply device in which the blocking occurs is in a closed state, so that the output end of the contactor in the power supply circuit of the power supply device can output a voltage, and thus the supply voltage detected when the contactor in the power supply circuit of the power supply device is stuck is blocked. The value of the supply voltage detected when the value is not stuck to the contactor in the power supply circuit of the power supply device is different. Further, the value of the power supply voltage detected when the contactor in the power supply circuit of the power supply device is not stuck is 0V, and the value of the power supply voltage detected when the contactor in the power supply circuit of the power supply device is stuck is greater than 0V, and Less than or equal to the power supply voltage of the power supply device.

It should be noted that, in the case that the power supply device and the battery management system have been connected, the contactor in the charging circuit of the battery management system is closed after the power supply device pulls the power supply voltage to the power supply voltage value in the indication information. That is, in the process that the power supply device pulls up the voltage according to the power supply voltage value, the contactor in the charging circuit of the battery management system is not closed, so the battery management system is not adhered regardless of whether the contactor in the power supply circuit of the power supply device is stuck. There is no current generated in the charging circuit. The precondition for the contactor to be stuck is that the contactor is in a closed state and a large current is passed, and the above process does not cause the battery management system to be in the charging circuit. The contactor is stuck. Therefore, when detecting the contact voltage in the power supply circuit of the power supply device by detecting the power supply voltage in the process, whether the contactor in the power supply circuit of the power supply device is stuck or not, the battery is not The security of the management system poses a threat.

In a possible embodiment, the supply voltage of the contactor output terminal in the power supply circuit of the power supply device is in the process of pulling the voltage according to the supply voltage value after the contactor in the power supply circuit of the power supply device is stuck. It is ramped up, so it is necessary to detect the supply voltage of the contactor output in the power supply circuit of the power supply device at least twice to determine whether the contactor in the power supply circuit of the power supply device is stuck.

In a feasible embodiment, if the power supply circuit of the power supply device includes two contactors, that is, the positive contactor and the negative contactor, when detecting the supply voltage of the contactor output in the power supply circuit of the power supply device, at least the power supply voltage can be detected. The supply voltage between the positive contactor output and the negative contactor output in the power supply loop of the two power supply units.

103. Determine, according to the detected value of the power supply voltage, whether the contactor in the power supply circuit of the power supply device is stuck.

Specifically, since the value of the power supply voltage detected when the contactor in the power supply circuit of the power supply device is stuck and the power supply voltage value detected when the contactor in the power supply circuit of the power supply device is not stuck is different, the detection may be performed. The value of the supplied voltage is determined to determine whether the contactor in the power supply circuit of the power supply device is stuck.

In a feasible embodiment, after detecting the supply voltage between the positive contactor output and the negative contactor output in the power supply circuit of the power supply device at least two times, it is necessary to determine any of the detected at least two times. Whether the difference between the supply voltage values between the positive contactor output end and the negative contactor output end in the power supply circuit of the power supply device is greater than or equal to a specified voltage threshold; if any of the detected at least two The difference between the supply voltage values between the positive contactor output end and the negative contactor output end of the power supply circuit of the two adjacent power supply devices is greater than or equal to a specified voltage threshold, and is determined in the power supply circuit of the power supply device. The positive contactor and the negative contactor are stuck; if any two of the detected at least two of the power supply circuits of the power supply device are connected to the supply voltage value between the positive contactor output and the negative contactor output The difference is less than the specified voltage threshold, and it is determined that the positive contactor and the negative contactor in the power supply circuit of the power supply device are not stuck.

Specifically, since the contactor is turned on after the contactor in the power supply circuit of the power supply device is stuck, the power supply voltage at the output end of the contactor increases rampage during the voltage rise of the power supply device, that is, the last time The detected supply voltage at the output of the contactor is less than the supply voltage at the output of the contactor detected next time, and as the voltage rises, the supply voltage of the last detected contactor output is contacted with the next detected contact. The difference in supply voltage at the output of the device will be larger and larger. According to the above principle, the specified voltage threshold can be set to 10V, if between at least two of the two adjacent detection power supply circuits of the power supply circuit between the positive contactor output and the negative contactor output If the difference between the supply voltage values is greater than or equal to 10V, it is determined that the positive contactor and the negative contactor in the power supply circuit of the power supply device are stuck; if at least two of the two adjacent power supply devices are detected The difference between the supply voltage values between the positive contactor output and the negative contactor output is less than 10V, and it is determined that the positive contactor and the negative contactor in the power supply circuit of the power supply device are not stuck.

It should be noted that in order to make the judgment result more accurate, it can be judged at least twice Whether the difference between the supply voltage values between the positive contactor output and the negative contactor output in the power supply loop is greater than or equal to a specified voltage threshold, when the positive contactor output in the power supply loop of the power supply device is at least twice The difference between the supply voltage values between the output terminals of the negative contactor is greater than or equal to the specified voltage threshold, determining that the positive contactor and the negative contactor in the power supply circuit of the power supply device are stuck; when at least two power supply circuits of the power supply device are in the power supply circuit The difference between the supply voltage values between the positive contactor output and the negative contactor output is less than a specified voltage threshold, and it is determined that the positive contactor and the negative contactor in the power supply circuit of the power supply device are not stuck. The specific number of judgments can be set according to actual needs.

In a feasible implementation, if it is determined that the contactor in the power supply circuit of the power supply device is stuck, in order to prevent the power supply device from pulling the voltage to the power supply voltage value, the battery management system is affected, and the battery management system is charged. The contactor in the loop also is stuck, and it is necessary to send an indication to the power supply device for instructing the power supply device to stop supplying power.

In a possible embodiment, the power supply device can be a power supply device.

In the embodiment of the present application, before the power supply device is required to provide power, the power supply device needs to generate indication information for indicating that the power supply device performs power supply, wherein the indication information carries a power supply voltage value, and then the power supply device is detected according to the power supply device. The supply voltage value pulls up the voltage during the voltage supply process. Since the power supply device pulls up the voltage according to the supply voltage value, the contactor in the power supply circuit of the power supply device that does not cause the adhesion does not close, and thus the power supply of the power supply device The output of the contactor in the loop does not output a voltage, and the contactor in the power supply device in which the blocking occurs is in a closed state, so that the output of the contactor in the power supply circuit of the power supply device can output a voltage, so the power supply device The value of the power supply voltage detected when the contactor in the power supply circuit is stuck and the value of the power supply voltage detected when the contactor in the power supply circuit of the power supply device is not stuck is different, so the value of the detected power supply voltage can be judged according to the detected power supply voltage value. Whether the contactor in the power supply circuit of the power supply device is stuck or not The battery safety management systems. Moreover, since it is judged whether the contactor in the power supply circuit of the power supply device is stuck or not, the detected power supply voltage value used is a power supply voltage in a process in which the power supply device pulls up the voltage according to the power supply voltage value, that is, the power supply device is in accordance with the power supply voltage. During the process of pulling up the voltage, it is detected whether the contactor in the power supply circuit of the power supply device is stuck. Since the output voltage of the power supply device has not reached the value of the power supply voltage carried in the indication information, the battery management system cannot be charged. The contactor in the circuit is closed, so the output voltage of the power supply device cannot cause the contactor in the charging circuit of the battery management system to be stuck, thereby determining the supply of the power supply device In the process of whether the contactor in the electrical circuit is stuck, the safety of the battery management system is not threatened, thereby further improving the safety of the battery management system.

Embodiment 2

As shown in FIG. 2 , a contactor adhesion detection method provided by an embodiment of the present application is applied to a battery management system, wherein the battery management system is connected to a charging post through a charging interface, and the method may include the following steps. :

201. Send a communication handshake message carrying a supply voltage value to the charging post.

Specifically, after the battery management system and the charging pile are connected through the charging interface, the battery management system can send a communication handshake message to the charging post, and after receiving the communication handshake message, the charging pile can follow the communication handshake message. The supply voltage value pulls up the voltage and pulls the voltage up to the supply voltage value to charge the battery pack in the battery management system.

In a feasible implementation manner, the communication handshake message carrying the supply voltage value may be sent to the charging post by: determining the supply voltage value according to the charging voltage of the battery pack in the battery management system; The power supply voltage value is encapsulated into the communication handshake message; the communication handshake message is sent to the charging stub.

Specifically, when the charging pile is charging the battery pack in the battery management system, it is required to provide electric energy according to the charging voltage of the battery pack, so that the battery pack can be ensured under the premise of ensuring rapid charging of the battery pack. Security, so before the supply voltage value is encapsulated into the communication handshake message, it is necessary to determine the charging voltage of the battery pack, and then determine the charging voltage as the supply voltage value, and package it into the communication handshake message, and The communication handshake message is sent to the charging post.

It should be noted that, since the battery management system and the charging post are connected through the charging interface, when it is determined that the contactor in the power supply circuit of the charging post does not cause adhesion, and the charging post pulls the voltage to the supply voltage value, The battery pack in the battery management system can be directly charged to quickly charge the battery pack in the battery management system.

202. Detect a power supply voltage in a process in which the charging post pulls a voltage according to the power supply voltage value.

Specifically, after receiving the communication handshake message, the charging pile parses the communication handshake message, obtains a power supply voltage value in the communication handshake message, and then supplies the charging voltage of the charging pile according to the power supply voltage value. Pulling up from 0V until the supply voltage is pulled up to the supply voltage value, after the supply voltage is pulled up to the supply voltage value, the contactor in the power supply circuit of the charging post is closed. Then start charging the battery pack in the battery management system. Since the charging post pulls up the voltage according to the supply voltage value, the contactor in the power supply circuit of the charging post that does not stick together does not close, so the output end of the contactor in the power supply circuit of the charging post does not output voltage, and The contactor in the charging pile in which the adhesion occurs is in a closed state, so that the output end of the contactor in the power supply circuit of the charging post can output a voltage, and thus the supply voltage detected when the contactor in the power supply circuit of the charging post is stuck The value of the supply voltage detected when the value does not adhere to the contactor in the power supply circuit of the charging post is different. Further, the value of the power supply voltage detected when the contactor in the power supply circuit of the charging post is not stuck is 0V, and the value of the power supply voltage detected when the contactor in the power supply circuit of the charging post is stuck is greater than 0V, and Less than or equal to the supply voltage of the charging post.

It should be noted that, in the case that the charging post and the battery management system have been connected, the contactor in the charging circuit of the battery management system is only after the charging post pulls the supply voltage to the supply voltage value in the communication handshake message. Will close, that is, in the process of charging the voltage according to the supply voltage value, the contactor in the charging circuit of the battery management system will not be closed, so whether the contactor in the power supply circuit of the charging pile is stuck or not, the battery There is no current generated in the charging circuit of the management system. The precondition for the contact of the contactor is that the contactor is in a closed state and a large current is passed, so that the charging circuit of the battery management system is not caused in the above process. The contactor in the middle of the contact is stuck. Therefore, by detecting the supply voltage in the process to determine whether the contactor in the power supply circuit of the charging post is stuck, no matter whether the contactor in the power supply circuit of the charging post is stuck or not, Threats to the security of battery management systems.

In a feasible implementation, in order to ensure the accuracy of the detection result, in the process of charging the voltage according to the supply voltage value, it is necessary to detect the contact of the positive contactor input terminal and the negative electrode in the charging circuit of the battery management system at least twice. a supply voltage between the inputs of the device; then detecting at least two supply voltages between the positive contactor input and the negative contactor input of the charging circuit of the battery management system as power to the charging post The corresponding supply voltage between the positive contactor output and the negative contactor output in the loop.

203. Determine, according to the detected value of the power supply voltage, whether the contactor in the power supply circuit of the charging post is stuck.

Specifically, since the value of the power supply voltage detected when the contactor in the power supply circuit of the charging post is stuck and the value of the power supply voltage detected when the contactor in the power supply circuit of the charging post is not stuck, the detection may be performed by detecting The value of the power supply voltage to determine the contact in the power supply circuit of the charging post Whether the device is stuck.

In a feasible implementation, after detecting the corresponding supply voltage between the positive contactor output and the negative contactor output in the power supply loop of the charging pile at least two times, it is necessary to determine any adjacent at least two times. Whether the difference between the corresponding supply voltage values between the positive contactor output end and the negative contactor output end of the power supply circuit of the charging pile is greater than or equal to a specified voltage threshold; if any two adjacent at least two The difference between the corresponding supply voltage values between the positive contactor output end and the negative contactor output end of the power supply circuit of the charging post is greater than or equal to a specified voltage threshold, and the positive electrode contact in the power supply circuit of the charging post is determined. The device and the negative contactor are stuck; if at least two of the two adjacent charging piles, the difference between the supply voltage values of the positive contactor output and the negative contactor output is less than A voltage threshold is specified to determine that the positive and negative contactors in the power supply loop of the charging post are not stuck.

Specifically, since the contactor is turned on after the contactor in the power supply circuit of the charging post is stuck, the power supply voltage at the output end of the contactor increases in a climbing manner during the charging of the charging pile, that is, the last time The detected supply voltage at the output of the contactor is less than the supply voltage at the output of the contactor detected next time, and as the voltage pull-up time increases, the supply voltage of the last detected contactor output is contacted with the next detected contact. The difference in supply voltage at the output of the device will be larger and larger. According to the above principle, the specified voltage threshold can be set to 10V, if at least two of the two adjacent two detected charging stubs in the power supply loop between the positive contactor output and the negative contactor output If the difference between the supply voltage values is greater than or equal to 10V, it is determined that the positive contactor and the negative contactor in the power supply loop of the charging post are stuck; if at least two of the adjacent two detected charging piles are supplied The difference between the supply voltage values between the positive contactor output and the negative contactor output is less than 10V, and it is determined that the positive contactor and the negative contactor in the power supply loop of the charging post are not stuck.

It should be noted that, in order to make the judgment result more accurate, it can be determined whether the difference between the supply voltage values between the positive contactor output end and the negative contactor output end in the power supply loop of at least two charging piles is greater than or equal to the specified voltage. The threshold value is determined when the difference between the supply voltage values between the positive contactor output terminal and the negative contactor output terminal in the power supply loop of the at least two charging piles is greater than or equal to a specified voltage threshold, and the positive pole in the power supply loop of the charging post is determined. The contactor and the negative contactor are stuck; when the difference between the supply voltage values between the positive contactor output and the negative contactor output in the power supply loop of the at least two charging piles is less than a specified voltage threshold, determining the charging pile Power supply loop The positive contactor and the negative contactor did not stick. The specific number of judgments can be set according to actual needs.

In a feasible implementation, if it is determined that the contactor in the power supply circuit of the charging post is stuck, in order to prevent the charging post from pulling the voltage to the supply voltage value, the battery management system is affected, and the battery management system is charged. The contactor in the loop also sticks, and it is necessary to send an indication to the charging post for instructing the charging post to stop supplying power.

In the embodiment of the present application, before the charging pile is required to supply electric energy, the communication handshake message carrying the supply voltage value needs to be sent to the charging post, and then the supply voltage in the process of pulling the voltage according to the supply voltage value is detected. In the process of pulling the voltage according to the value of the supply voltage, the contactor in the power supply circuit of the charging pile that does not stick to the charging pile is not closed, and the output end of the contactor in the power supply circuit of the charging pile does not output a voltage. The contactor in the charging pile in which the adhesion occurs is in a closed state, so that the output end of the contactor in the power supply circuit of the charging post can output a voltage, and thus the power supply detected when the contactor in the power supply circuit of the charging post is stuck. The voltage value is different from the value of the power supply voltage detected when the contactor in the power supply circuit of the charging post is not stuck. Therefore, it can be determined whether the contactor in the power supply circuit of the charging post is stuck according to the detected power supply voltage value. , thereby improving the security of the battery management system. Moreover, since it is judged whether or not the contactor in the power supply circuit of the charging post is stuck, the detected power supply voltage value used is a power supply voltage in a process in which the charging pile pulls up the voltage according to the power supply voltage value, that is, the charging pile is in accordance with the power supply voltage. During the process of pulling up the voltage, it is detected whether the contactor in the power supply circuit of the charging post is stuck. At this time, the output voltage of the charging post has not reached the value of the power supply voltage carried in the communication handshake message, and cannot be made in the battery management system. The contactor in the charging circuit is closed, so the output voltage of the charging post cannot cause the contactor in the charging circuit of the battery management system to be stuck, and in the process of determining whether the contactor in the power supply circuit of the charging post is stuck, It does not pose a threat to the safety of the battery management system, thus further improving the security of the battery management system.

Embodiment 3

In order to further illustrate the technical idea of the embodiment of the present application, a specific implementation manner is provided. As shown in FIG. 3, a connection diagram of a battery management system and a charging post provided by an embodiment of the present application is provided, where K1 And K2 are respectively a positive contactor and a negative contactor in the charging pile power supply circuit, and K3 and K4 are a positive contactor and a negative contactor respectively in the charging circuit of the battery management system, and the contactor adhesion detecting method may include the following steps:

1. The battery management system determines the supply voltage value according to the charging voltage of the battery pack.

2. The battery management system encapsulates the supply voltage value into a communication handshake message.

3. The battery management system sends the communication handshake message to the charging pile.

4. The charging post pulls up the voltage according to the value of the power supply voltage in the communication handshake message.

5. During the charging of the charging pile, the battery management system detects the voltage of the K3 input terminal and the K4 input terminal four times.

Specifically, the voltages at U7 and U6 are detected.

6. Calculate the difference between the voltage of each detected K3 input and K4 input to determine the supply voltage of each detected charging post.

7. Determine whether the difference between the supply voltage of the second and first charging piles, the difference between the supply voltage of the third and second charging piles, and the difference between the supply voltages of the fourth and third charging piles are greater than Or equal to 10V.

8. If the difference between the supply voltage of the second and first charging piles, the difference between the supply voltage of the third and second charging piles, and the supply voltage of the fourth and third charging piles are greater than or Equal to 10V, it is determined that K1 and K2 are adhesions; if the difference between the supply voltage of the second and first charging piles, the difference between the supply voltage of the third and second charging piles, the fourth and third charging The difference between the supply voltages of the piles is less than 10V, and it is determined that K1 and K2 are not stuck.

10. If it is determined that K1 and K2 are stuck, an indication message for stopping the power supply is sent to the charging post.

The embodiment of the present application further provides an apparatus embodiment for implementing the steps and methods in the foregoing method embodiments.

Embodiment 4

As shown in FIG. 4, a contactor adhesion detecting device according to an embodiment of the present invention includes: a transmitting unit 41, configured to send, to the power supply device, indication information for instructing the power supply device to supply power, where The indication information carries a supply voltage value; the detecting unit 42 is configured to detect a power supply voltage in the process of pulling the voltage according to the power supply voltage value; and the determining unit 43 is configured to use the detected power supply voltage And determining whether the contactor in the power supply circuit of the power supply device is stuck.

In a specific implementation, the sending unit 41 is specifically configured to: determine the power supply voltage value according to a charging voltage of a battery to be charged; and package the power supply voltage value into the indication letter And transmitting the indication information to the power supply device.

In a specific embodiment, the detecting unit 42 is configured to: detect, in the process of pulling the voltage according to the power supply voltage value, the contact in the power supply circuit of the power supply device at least twice The supply voltage at the output of the device.

In a specific embodiment, the detecting unit 42 is specifically configured to: detect a supply voltage between the positive contactor output and the negative contactor output in the power supply circuit of the power supply device at least twice.

In a specific implementation, the determining unit 43 is specifically configured to: determine a positive contactor output terminal and a negative contactor in a power supply loop of any two adjacent power supply devices that are detected at least twice Whether the difference between the supply voltage values between the output terminals is greater than or equal to the specified voltage threshold; if any two of the detected at least two of the power supply circuits of the power supply device are in contact with the negative electrode contact The difference between the supply voltage values between the output ends of the device is greater than or equal to the specified voltage threshold, determining that the positive contactor and the negative contactor in the power supply circuit of the power supply device are stuck; if any of the detected at least two The difference between the supply voltage values between the output of the positive contactor and the output of the negative contactor in the power supply circuit of the power supply device is less than a specified voltage threshold, and the positive contactor in the power supply circuit of the power supply device is determined. No adhesion occurred to the negative contactor.

In a specific embodiment, the sending unit 41 is further configured to: if it is determined that the contactor in the power supply circuit of the power supply device is stuck, send the power supply device to instruct the power supply device to stop supplying power. Instructions.

In a specific embodiment, the power supply device includes a charging post.

For the components in the first embodiment, the method shown in the first embodiment can be performed. For the parts that are not described in detail in this embodiment, reference may be made to the related description of the first embodiment.

In the embodiment of the present application, before the power supply device is required to provide power, the power supply device needs to generate indication information for indicating that the power supply device performs power supply, wherein the indication information carries a power supply voltage value, and then the power supply device is detected according to the power supply device. The supply voltage value pulls up the voltage during the voltage supply process. Since the power supply device pulls up the voltage according to the supply voltage value, the contactor in the power supply circuit of the power supply device that does not cause the adhesion does not close, and thus the power supply of the power supply device The output of the contactor in the loop does not output a voltage, and the contactor in the power supply device that is stuck is closed, so that the output of the contactor in the power supply circuit of the power supply device can output a voltage, so the power supply The value of the power supply voltage detected when the contactor in the power supply circuit is stuck and the value of the power supply voltage detected when the contactor in the power supply circuit of the power supply device is not stuck is different, and therefore, according to the detected power supply voltage value, It is judged whether the contactor in the power supply circuit of the power supply device is stuck, thereby improving the safety of the battery management system. Moreover, since it is judged whether the contactor in the power supply circuit of the power supply device is stuck or not, the detected power supply voltage value used is a power supply voltage in a process in which the power supply device pulls up the voltage according to the power supply voltage value, that is, the power supply device is in accordance with the power supply voltage. During the process of pulling up the voltage, it is detected whether the contactor in the power supply circuit of the power supply device is stuck. Since the output voltage of the power supply device has not reached the value of the power supply voltage carried in the indication information, the battery management system cannot be charged. The contactor in the circuit is closed, so the output voltage of the power supply device cannot cause the contactor in the charging circuit of the battery management system to be stuck, and in the process of determining whether the contactor in the power supply circuit of the power supply device is stuck, It poses a threat to the security of the battery management system, thus further improving the security of the battery management system.

Embodiment 5

As shown in FIG. 5, the embodiment of the present application provides a battery management system, where the battery management system includes: a sending unit 51, configured to send a communication handshake message carrying a power supply voltage value to a charging post; and the detecting unit 52 uses The detecting unit 53 is configured to determine whether the contactor in the power supply circuit of the charging post occurs according to the detected power supply voltage value. Sticky.

In a specific implementation, the sending unit 51 is specifically configured to: determine the power supply voltage value according to a charging voltage of a battery pack in the battery management system; and package the power supply voltage value into the communication In the handshake message, the communication handshake message is sent to the charging stub.

In a specific embodiment, the detecting unit 52 is configured to: detect the positive electrode in the charging circuit of the battery management system at least twice during the charging of the charging pile according to the supply voltage value. a supply voltage between the contactor input and the negative contactor input; the supply voltage between the positive contactor input and the negative contactor input in the charging circuit of the battery management system will be detected at least twice as a corresponding supply voltage between the output of the positive contactor and the output of the negative contactor in the power supply circuit of the charging post.

In a specific implementation, the determining unit 53 is specifically configured to: determine a positive contactor output end and a negative contactor output end in a power supply loop of any two adjacent charging stubs at least twice Whether the difference between the corresponding supply voltage values is greater than or equal to the specified voltage threshold; Determining the difference between the corresponding supply voltage values between the positive contactor output end and the negative contactor output end in the power supply loop of any two adjacent charging stubs at least twice The positive contactor and the negative contactor in the power supply circuit of the charging post are stuck; if at least two of the two adjacent charging piles are connected between the positive contactor output and the negative contactor output The difference between the corresponding supply voltage values is less than the specified voltage threshold, and it is determined that the positive contactor and the negative contactor in the power supply loop of the charging post are not stuck.

In a specific embodiment, the sending unit 51 is further configured to: if it is determined that the contactor in the power supply circuit of the charging post is stuck, send the charging post to instruct the charging pile to stop supplying power. Instructions.

For the components in the embodiment to be able to perform the method shown in the second embodiment, and the portions not described in detail in this embodiment, reference may be made to the related description of the second embodiment.

In the embodiment of the present application, before the charging pile is required to supply electric energy, the communication handshake message carrying the supply voltage value needs to be sent to the charging post, and then the supply voltage in the process of pulling the voltage according to the supply voltage value is detected. In the process of pulling the voltage according to the value of the supply voltage, the contactor in the power supply circuit of the charging pile that does not stick to the charging pile is not closed, and the output end of the contactor in the power supply circuit of the charging pile does not output a voltage. The contactor in the charging pile in which the adhesion occurs is in a closed state, so that the output end of the contactor in the power supply circuit of the charging post can output a voltage, and thus the power supply detected when the contactor in the power supply circuit of the charging post is stuck. The voltage value is different from the value of the power supply voltage detected when the contactor in the power supply circuit of the charging post is not stuck. Therefore, it can be determined whether the contactor in the power supply circuit of the charging post is stuck according to the detected power supply voltage value. , thereby improving the security of the battery management system. Moreover, since it is judged whether or not the contactor in the power supply circuit of the charging post is stuck, the detected power supply voltage value used is a power supply voltage in a process in which the charging pile pulls up the voltage according to the power supply voltage value, that is, the charging pile is in accordance with the power supply voltage. During the process of pulling up the voltage, it is detected whether the contactor in the power supply circuit of the charging post is stuck. At this time, the output voltage of the charging post has not reached the value of the power supply voltage carried in the communication handshake message, and cannot be made in the battery management system. The contactor in the charging circuit is closed, so the output voltage of the charging post cannot cause the contactor in the charging circuit of the battery management system to be stuck, and in the process of determining whether the contactor in the power supply circuit of the charging post is stuck, It does not pose a threat to the safety of the battery management system, thus further improving the security of the battery management system.

It will be apparent to those skilled in the art that the above description is convenient and concise for the description. For the specific working process of the system, the device and the unit, refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner. For example, multiple units or components may be combined. Or it can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

The above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform the methods of the various embodiments of the present application. Part of the steps. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. .

The above is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc., which are made within the spirit and principles of the present application, should be included in the present application. Within the scope of protection.

Claims (24)

1. A contactor adhesion detecting method, characterized in that the method comprises:

   Sending, to the power supply device, indication information for instructing the power supply device to perform power supply, wherein the indication information carries a power supply voltage value;

   Detecting a supply voltage during a process in which the power supply device pulls up the voltage according to the supply voltage value;

   Judging whether the contactor in the power supply circuit of the power supply device is stuck according to the detected power supply voltage value.
2. The method of claim 1, wherein the step of transmitting the indication information for instructing the power supply device to supply power to the power supply device comprises:

   Determining the supply voltage value according to a charging voltage of the battery to be charged;

   Encapsulating the supply voltage value into the indication information;

   Sending the indication information to the power supply device.
3. The method of claim 1, wherein the step of detecting the supply voltage in the process of pulling the voltage according to the supply voltage value comprises:

   During a process in which the power supply device pulls up the voltage according to the supply voltage value, the supply voltage of the contactor output terminal in the power supply circuit of the power supply device is detected at least twice.
4. The method according to claim 3, wherein the step of detecting the supply voltage of the contactor output terminal in the power supply circuit of the power supply device at least twice comprises:

   The supply voltage between the positive contactor output and the negative contactor output in the power supply circuit of the power supply device is detected at least twice.
5. The method according to claim 4, wherein the step of determining whether the contactor in the power supply circuit of the power supply device is stuck according to the detected power supply voltage value comprises:

   Determining whether the difference between the supply voltage values between the positive contactor output and the negative contactor output in the power supply loop of any two adjacent two of the detected at least two times is greater than or equal to a specified voltage threshold ;

   If the difference between the supply voltage values between the positive contactor output and the negative contactor output in the power supply loop of any two adjacent power supply devices is at least equal to or equal to a specified voltage threshold, Determining that the positive electrode contactor and the negative electrode contactor in the power supply circuit of the power supply device are stuck;

   If any of the detected at least two of the two adjacent power supply devices are positive in the power supply circuit The difference between the supply voltage values between the pole contactor output and the negative contactor output is less than a specified voltage threshold, and it is determined that the positive contactor and the negative contactor in the power supply circuit of the power supply device are not stuck.
6. The method of claim 1 further comprising:

   If it is determined that the contactor in the power supply circuit of the power supply device is stuck, the indication information for instructing the power supply device to stop the power supply is sent to the power supply device.
7. The method of claim 1 wherein said power supply means comprises a charging post.
8. A contactor adhesion detecting device, characterized in that the device comprises:

   a sending unit, configured to send, to the power supply device, indication information for instructing the power supply device to perform power supply, where the indication information carries a power supply voltage value;

   a detecting unit, configured to detect a power supply voltage in a process in which the power supply device pulls a voltage according to the power supply voltage value;

   The determining unit is configured to determine, according to the detected power supply voltage value, whether the contactor in the power supply circuit of the power supply device is stuck.
9. The device according to claim 8, wherein the sending unit is specifically configured to:

   Determining the supply voltage value according to a charging voltage of the battery to be charged;

   Encapsulating the supply voltage value into the indication information;

   Sending the indication information to the power supply device.
10. The device according to claim 8, wherein the detecting unit is specifically configured to:

    During a process in which the power supply device pulls up the voltage according to the supply voltage value, the supply voltage of the contactor output terminal in the power supply circuit of the power supply device is detected at least twice.
11. The device according to claim 10, wherein the detecting unit is specifically configured to:

    The supply voltage between the positive contactor output and the negative contactor output in the power supply circuit of the power supply device is detected at least twice.
12. The device according to claim 11, wherein the determining unit is specifically configured to:

    Determining whether the difference between the supply voltage values between the positive contactor output and the negative contactor output in the power supply loop of any two adjacent two of the detected at least two times is greater than or equal to a specified voltage threshold ;

    If the difference between the supply voltage values between the positive contactor output and the negative contactor output in the power supply loop of the power supply device of any two of the detected at least two times is greater than or equal to Specifying a voltage threshold to determine that the positive contactor and the negative contactor in the power supply circuit of the power supply device are stuck;

    If the difference between the supply voltage values between the positive contactor output and the negative contactor output in the power supply loop of any two adjacent power supply devices is less than the specified voltage threshold, determine the The positive contactor and the negative contactor in the power supply circuit of the power supply device are not stuck.
13. The device according to claim 8, wherein the sending unit is further configured to:

    If it is determined that the contactor in the power supply circuit of the power supply device is stuck, the indication information for instructing the power supply device to stop the power supply is sent to the power supply device.
14. The device of claim 8 wherein said power supply means comprises a charging post.
15. A contactor adhesion detecting method, characterized in that the method is applied to a battery management system, the method comprising:

    Sending a communication handshake message carrying a supply voltage value to the charging post;

    Detecting a supply voltage during a process in which the charging post pulls a voltage according to the supply voltage value;

    Based on the detected supply voltage value, it is determined whether the contactor in the power supply circuit of the charging post is stuck.
16. The method of claim 15, wherein the step of transmitting a communication handshake message carrying a supply voltage value to the charging post comprises:

    Determining the supply voltage value according to a charging voltage of the battery pack in the battery management system;

    Encapsulating the supply voltage value into the communication handshake message;

    Sending the communication handshake message to the charging stub.
17. The method according to claim 15, wherein the step of detecting the supply voltage in the process of pulling up the voltage according to the supply voltage value comprises:

    During a process in which the charging post pulls up the voltage according to the supply voltage value, detecting a supply voltage between the positive contactor input end and the negative contactor input end of the charging circuit of the battery management system at least twice;

    The detected supply voltage between the positive contactor input terminal and the negative contactor input terminal of the charging circuit of the battery management system is detected as the positive contactor output terminal and the negative electrode in the power supply circuit of the charging post The corresponding supply voltage between the output of the contactor.
18. The method of claim 17 wherein said based on said detected power supply The step of determining the adhesion of the contactor in the power supply circuit of the charging post includes:

    Determining whether the difference between the corresponding supply voltage values between the positive contactor output end and the negative contactor output end in the power supply loop of any two adjacent charging stubs at least twice is greater than or equal to a specified voltage threshold;

    If the difference between the power supply voltage values between the positive contactor output terminal and the negative contactor output terminal in the power supply loop of any two adjacent charging stubs at least twice is greater than or equal to a specified voltage threshold, determine The positive contactor and the negative contactor in the power supply circuit of the charging post are stuck;

    Determining the charging if the difference between the corresponding supply voltage values between the positive contactor output and the negative contactor output in the power supply loop of any two adjacent charging stubs is less than a specified voltage threshold The positive contactor and the negative contactor in the power supply loop of the pile did not stick.
19. The method of claim 15 further comprising:

    If it is determined that the contactor in the power supply circuit of the charging post is stuck, the indication information for instructing the charging pile to stop supplying power is sent to the charging post.
20. A battery management system, characterized in that the battery management system comprises:

    a sending unit, configured to send, to the charging post, a communication handshake message carrying a supply voltage value;

    a detecting unit, configured to detect a power supply voltage in a process in which the charging pile pulls a voltage according to the power supply voltage value;

    The determining unit is configured to determine, according to the detected power supply voltage value, whether the contactor in the power supply circuit of the charging post is stuck.
21. The battery management system according to claim 20, wherein the sending unit is specifically configured to:

    Determining the supply voltage value according to a charging voltage of the battery pack in the battery management system;

    Encapsulating the supply voltage value into the communication handshake message;

    Sending the communication handshake message to the charging stub.
22. The battery management system according to claim 20, wherein the detecting unit is specifically configured to:

    During a process in which the charging post pulls up the voltage according to the supply voltage value, detecting a supply voltage between the positive contactor input end and the negative contactor input end of the charging circuit of the battery management system at least twice;

    At least two positive contactor inputs in the charging circuit of the battery management system to be detected And a supply voltage between the input terminal of the negative contactor and a corresponding supply voltage between the output of the positive contactor and the output of the negative contactor in the power supply circuit of the charging post.
23. The battery management system according to claim 22, wherein the determining unit is specifically configured to:

    Determining whether the difference between the corresponding supply voltage values between the positive contactor output end and the negative contactor output end in the power supply loop of any two adjacent charging stubs at least twice is greater than or equal to a specified voltage threshold;

    If the difference between the power supply voltage values between the positive contactor output terminal and the negative contactor output terminal in the power supply loop of any two adjacent charging stubs at least twice is greater than or equal to a specified voltage threshold, determine The positive contactor and the negative contactor in the power supply circuit of the charging post are stuck;

    Determining the charging if the difference between the corresponding supply voltage values between the positive contactor output and the negative contactor output in the power supply loop of any two adjacent charging stubs is less than a specified voltage threshold The positive contactor and the negative contactor in the power supply loop of the pile did not stick.
24. The battery management system of claim 20, wherein the sending unit is further configured to:

    If it is determined that the contactor in the power supply circuit of the charging post is stuck, the indication information for instructing the charging pile to stop supplying power is sent to the charging post.

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