CN117183746B - Contactor control method, power supply system and automobile - Google Patents
Contactor control method, power supply system and automobile Download PDFInfo
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- CN117183746B CN117183746B CN202311478721.9A CN202311478721A CN117183746B CN 117183746 B CN117183746 B CN 117183746B CN 202311478721 A CN202311478721 A CN 202311478721A CN 117183746 B CN117183746 B CN 117183746B
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Abstract
The invention discloses a contactor control method, a power supply system and an automobile, which comprise the steps of obtaining a current control request, wherein the current control request comprises priority information; if the number of times of the first contactor used as the prior disconnection contactor reaches a first preset number of times, if the number of times of the second contactor used as the prior disconnection contactor reaches the first preset number of times, if the number of times of the first contactor used as the prior disconnection contactor reaches a second preset number of times, updating priority information; based on the priority information, the first contactor and the second contactor are controlled to be closed or opened, so that the first contactor and the second contactor are alternately used as the prior opening contactor, the first contactor or the second contactor is prevented from being influenced by an electric arc for a long time, and the service lives of the first contactor and the second contactor are prolonged.
Description
Technical Field
The invention relates to the technical field of automobile control, in particular to a contactor control method, a power supply system and an automobile.
Background
In a new energy automobile, a main positive contactor and a main negative contactor are two important devices. In the prior art, the main positive contactor and the main negative contactor are two independent devices, and because the battery pack of the new energy automobile is a high-voltage unit, electric arcs are easy to generate when the main positive contactor and the main negative contactor are used, the contacts of the main positive contactor and the main negative contactor are damaged, and after the electric arcs are generated for a certain number of times, the main positive contactor and the main negative contactor are easy to damage, the service lives of the main positive contactor and the main negative contactor are influenced, and potential safety hazards are brought.
Disclosure of Invention
The embodiment of the invention provides a contactor control method, a power supply system and an automobile, which are used for solving the problem that the service life is lower because a main positive contactor and a main negative contactor in the existing new energy automobile are easily affected by electric arcs.
A contactor control method is applied to a power supply system, wherein the power supply system comprises a power supply loop and a control module; the power supply loop comprises a first contactor and a second contactor; the control end of the first contactor and the control end of the second contactor are respectively connected with the control module; the contactor control method comprises the steps executed by the control module:
Acquiring a current control request, wherein the current control request comprises priority information; wherein the priority information includes that one of the first contactor and the second contactor is a previously closed contactor and the other is a previously open contactor;
if the number of times of using the first contactor as the prior opening contactor reaches a first preset number of times of using, determining the first contactor as a prior closing contactor, determining the second contactor as a prior opening contactor, and updating the priority information;
if the usage frequency of the second contactor as the prior opening contactor reaches a first preset usage frequency, determining the second contactor as a prior closing contactor, determining the first contactor as a prior opening contactor, and updating the priority information;
if the number of times of using the first contactor as the prior opening contactor reaches a second preset number of times of using, determining the first contactor as the prior closing contactor, determining the second contactor as the prior opening contactor, and updating the priority information;
if the number of times of use of the second contactor as the prior open contactor reaches a second preset number of times of use, determining the second contactor as the prior closed contactor, determining the first contactor as the prior open contactor, and updating the priority information;
And controlling the first contactor and the second contactor to be closed or opened based on the priority information.
Further, the contactor control method further includes:
and generating a target alarm signal when the number of times of using the first contactor as the prior closed contactor and the number of times of using the second contactor as the prior closed contactor reach the second preset number of times of using.
Further, in the priority information, the first contactor is a previously closed contactor and the second contactor is a previously opened contactor;
the controlling the first contactor and the second contactor to be closed or opened based on the priority information includes:
if the current control request is a closing request, outputting a first control signal and a previous closing signal, controlling the first contactor to be closed before, outputting a second control signal and a subsequent closing signal, and controlling the second contactor to be closed after;
and if the current control request is a disconnection request, outputting a third control signal and a previous disconnection signal, controlling the second contactor to be disconnected before, outputting a fourth control signal and a subsequent disconnection signal, and controlling the first contactor to be disconnected after.
Further, in the priority information, the second contactor is a previously closed contactor, and the first contactor is a previously opened contactor;
the controlling the first contactor and the second contactor to be closed or opened based on the priority information includes:
if the current control request is a closing request, outputting a second control signal and a previous closing signal, controlling the second contactor to be closed before, outputting a first control signal and a subsequent closing signal, and controlling the first contactor to be closed after;
and if the current control request is a disconnection request, outputting a fourth control signal and a previous disconnection signal, controlling the first contactor to be disconnected before, outputting a third control signal and a subsequent disconnection signal, and controlling the second contactor to be disconnected after.
Further, the contactor control method further includes:
outputting a timing control signal to a counter, and controlling the counter to record corresponding target use times of the first contactor and the second contactor;
receiving the target use times output by the counter;
based on the target number of uses, a number of uses of the first contactor as the prior closed contactor and a number of uses of the second contactor as the prior closed contactor are determined.
A contactor control method is applied to a power supply system, wherein the power supply system comprises a power supply loop and a control module; the power supply loop comprises a first contactor and a second contactor; the control end of the first contactor and the control end of the second contactor are respectively connected with the control module; the contactor control method comprises the steps executed by the control module:
acquiring a current control request, wherein the current control request comprises priority information;
if the priority information is that the first contactor is a prior closed contactor and the second contactor is a prior open contactor, determining the first contactor as the prior open contactor, determining the second contactor as the prior closed contactor, and updating the priority information;
if the priority information is that the first contactor is a prior open contactor and the second contactor is a prior closed contactor, determining the first contactor as the prior closed contactor, determining the second contactor as the prior open contactor, and updating the priority information;
and controlling the first contactor and the second contactor to be closed or opened based on the updated priority information.
Further, the contactor control method further includes:
outputting a timing control signal to a counter, and controlling the counter to record corresponding target use times of the first contactor and the second contactor;
receiving the target use times output by the counter;
judging whether the target use times meet the target use conditions or not;
and if the target use condition is not met, generating a target alarm signal.
Further, the target number of uses includes a first number of uses of the first contactor and a second number of uses of the second contactor;
the judging whether the target use times meet the target use conditions comprises the following steps:
and if the first using times and the second using times are both larger than or equal to the target using times, determining that the target using times do not meet the target using conditions.
A power supply system comprises a power supply loop and a control module; the power supply loop comprises a first contactor and a second contactor; the control end of the first contactor and the control end of the second contactor are respectively connected with the control module; the control module is used for executing the contactor control method or the contactor control method.
An automobile comprises the power supply system.
According to the contactor control method, the power supply system and the automobile, the current control request is obtained, and the current control request comprises priority information; wherein the priority information includes that one of the first contactor and the second contactor is a previously closed contactor and the other is a previously open contactor. When the number of times of use of the first contactor as the preceding open contactor reaches a first preset number of times of use, the first contactor is determined to be the preceding closed contactor, the second contactor is determined to be the preceding open contactor, and the priority information is updated. And when the use times of the second contactor as the prior opening contactor reach the first preset use times, determining the second contactor as the prior closing contactor, determining the first contactor as the prior opening contactor, and updating the priority information. When the number of times of use of the first contactor as the preceding open contactor reaches a second preset number of times of use, the first contactor is determined to be the preceding closed contactor, the second contactor is determined to be the preceding open contactor, and the priority information is updated. When the use times of the second contactor as the prior opening contactor reaches the second preset use times, the second contactor is determined to be the prior closing contactor, the first contactor is determined to be the prior opening contactor, priority information is updated, and finally the first contactor and the second contactor are controlled to be closed or opened based on the priority information, so that the first contactor and the second contactor are alternately used as the prior opening contactor, the first contactor or the second contactor is prevented from being influenced by electric arcs for a long time, and the service lives of the first contactor and the second contactor are prolonged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments of the present invention will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a contactor control method according to an embodiment of the invention;
FIG. 2 is another flow chart of a contactor control method according to an embodiment of the invention;
FIG. 3 is another flow chart of a contactor control method according to an embodiment of the invention;
FIG. 4 is another flow chart of a contactor control method according to an embodiment of the invention;
FIG. 5 is another flow chart of a contactor control method according to an embodiment of the invention;
FIG. 6 is another flow chart of a contactor control method according to an embodiment of the invention;
FIG. 7 is a schematic diagram of a power supply system according to an embodiment of the invention;
fig. 8 is another schematic diagram of a power supply system according to an embodiment of the invention.
In the figure: 10. a power module; 20. a first contactor; 30. a second contactor; 40. a control module; 50. a load module; 60. a counter.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In the following description, for the purpose of providing a thorough understanding of the present invention, detailed structures and steps are presented in order to illustrate the technical solution presented by the present invention. Preferred embodiments of the present invention are described in detail below, however, the present invention may have other embodiments in addition to these detailed descriptions.
The embodiment provides a contactor control method which is applied to an automobile. As shown in fig. 7, the automobile includes a power supply system including a power supply circuit and a control module 40; the power supply loop comprises a first contactor 20 and a second contactor 30; the control end of the first contactor 20 and the control end of the second contactor 30 are respectively connected with the control module 40; the control module 40 is used to perform the contactor control method. The first contactor 20 is a main positive contactor and the second contactor 30 is a main negative contactor, or the first contactor 20 is a main negative contactor and the second contactor 30 is a main positive contactor.
Further, the power supply loop further comprises a power module 10 and a load module 50, the power module 10 comprising a power battery. The load module 50 includes a drive motor. As an example, the first contactor 20 is disposed in series between the positive pole of the power module 10 and the load module 50; the second contactor 30 is disposed in series between the negative pole of the power module 10 and the load module 50.
The embodiment provides a contactor control method, which is applied to a power supply system, wherein the power supply system comprises a power supply loop and a control module 40; the power supply loop comprises a first contactor 20 and a second contactor 30; the control end of the first contactor 20 and the control end of the second contactor 30 are respectively connected with the control module 40; as shown in fig. 1, the contactor control method includes the steps performed by the control module 40:
s101: acquiring a current control request, wherein the current control request comprises priority information; wherein the priority information includes that one of the first contactor 20 and the second contactor 30 is a previously closed contactor and the other is a previously open contactor.
S102: if the number of uses of the first contactor 20 as the preceding open contactor reaches the first preset number of uses, the first contactor 20 is determined to be the preceding closed contactor, the second contactor 30 is determined to be the preceding open contactor, and the priority information is updated.
S103: if the number of uses of the second contactor 30 as the preceding open contactor reaches the first preset number of uses, the second contactor 30 is determined to be the preceding closed contactor, the first contactor 20 is determined to be the preceding open contactor, and the priority information is updated.
S104: if the number of uses of the first contactor 20 as the prior open contactor reaches the second preset number of uses, the first contactor 20 is determined to be the prior closed contactor, the second contactor 30 is determined to be the prior open contactor, and the priority information is updated.
S105: if the number of uses of the second contactor 30 as the prior open contactor reaches the second preset number of uses, the second contactor 30 is determined to be the prior closed contactor, the first contactor 20 is determined to be the prior open contactor, and the priority information is updated.
S106: based on the priority information, the first contactor 20 and the second contactor 30 are controlled to be closed or opened.
As an example, in step S101, the current control request refers to a request to control the first contactor 20 and the second contactor 30 to be closed or opened. The priority information refers to information for controlling the operation priorities of the first contactor 20 and the second contactor 30. In this embodiment, the current control request may be configured through a man-machine interface, and the priority information may be information configured through the man-machine interface, or may be information read from a database. Illustratively, the first contactor 20 may be configured as a prior closed contactor, the second contactor 30 may be a subsequent closed contactor, the second contactor 30 may be a prior open contactor, and the first contactor 20 may be a subsequent open contactor. The second contactor 30 may be configured as a preceding closed contactor, the first contactor 20 as a following closed contactor, the first contactor 20 as a preceding open contactor, and the second contactor 30 as a following open contactor. The first contactor 20 and the second contactor 30 are ensured to be closed or opened sequentially, and the closed contactor is opened first.
As an example, in step S102, if the number of uses of the first contactor 20 as the previous open contactor reaches the first preset number of uses, the first contactor 20 is determined as the previous closed contactor, the second contactor 30 is determined as the previous open contactor, and the priority information is updated. The first preset number of uses refers to a judgment condition for judging whether to update the priority information. Specifically, when the second contactor 30 is used as a pre-close contactor and the first contactor 20 is used as a pre-open contactor, since there is no current in the power supply loop when the pre-close contactor is pre-closed, no arcing damage to the pre-close contactor occurs, and when the post-close contactor is closed or when the post-close contactor is opened, i.e., the pre-open contactor is opened, there is current in the power supply loop, and arcing occurs, which may damage the contacts of the post-close contactor, affecting the post-close contactor. Therefore, when the number of times of use of the first contactor 20 as the preceding open contactor reaches the first preset number of times of use, at this time, the arc affects the first contactor 20 to a certain extent, in order to increase the service life of the first contactor 20, the first contactor 20 is determined as the preceding closed contactor, the second contactor 30 is determined as the preceding open contactor, and the priority information is updated to increase the service life of the first contactor 20.
As an example, in step S103, if the number of times of use of the second contactor 30 as the previous open contactor reaches the first preset number of times of use, the second contactor 30 is determined as the previous closed contactor, the first contactor 20 is determined as the previous open contactor, and the priority information is updated. Specifically, in the last updating of the priority information, after the second contactor 30 is used as the previous open contactor, the number of times of use of the second contactor 30 as the previous open contactor is determined to reach the first preset number of times of use, so as to determine whether the second contactor 30 is used as the previous open contactor and is affected by the arc to a certain extent, when the number of times of use of the second contactor 30 as the previous open contactor reaches the first preset number of times of use, the arc affects the second contactor 30 to a certain extent, and in order to improve the service life of the second contactor 30, the second contactor 30 is determined to be the previous closed contactor, the first contactor 20 is determined to be the previous open contactor, and the priority information is updated so as to improve the service life of the first contactor 20.
As an example, in step S104, if the number of uses of the first contactor 20 as the previous open contactor reaches the second preset number of uses, the first contactor 20 is determined as the previous closed contactor, the second contactor 30 is determined as the previous open contactor, and the priority information is updated. The second preset usage frequency refers to a judging condition for judging whether to update the priority information. The second preset number of uses is greater than the first preset number of uses. The first preset use times and the second preset use times can be set according to actual experience, so that the second preset use times are ensured to be larger than the first preset use times, and the method is not limited.
Specifically, when the number of times of use of the first contactor 20 as the preceding open contactor and the number of times of use of the second contactor 30 as the preceding open contactor all reach the first preset number of times of use, the priority information at this time is updated to the first contactor 20 as the preceding open contactor and the second contactor 30 as the preceding closed contactor until the number of times of use of the first contactor 20 as the preceding open contactor reaches the second preset number of times of use, the first contactor 20 is determined to be the preceding closed contactor, the second contactor 30 is determined to be the preceding open contactor, and the priority information is updated to prevent the first contactor 20 from being affected by an arc for a long time, thereby improving the life of the first contactor 20.
As an example, in step S105, if the number of uses of the second contactor 30 as the previous open contactor reaches the second preset number of uses, the second contactor 30 is determined as the previous closed contactor, the first contactor 20 is determined as the previous open contactor, and the priority information is updated. Specifically, when the number of times of use of the first contactor 20 as the preceding open contactor reaches the second preset number of times of use, the first contactor 20 is determined as the preceding closed contactor, and the second contactor 30 is determined as the preceding open contactor until the number of times of use of the second contactor 30 as the preceding open contactor reaches the second preset number of times of use, so as to prevent the second contactor 30 from being affected by the arc for a long time, thereby improving the lifetime of the second contactor 30.
As an example, in step S106, the first contactor 20 and the second contactor 30 are controlled to be closed or opened based on the priority information. In the present embodiment, the priority information is updated by judging whether the number of times the first contactor 20 is used as the previous open contactor and whether the number of times the second contactor 30 is used as the previous open contactor satisfies the first preset number of times and the second preset number of times, and the first contactor 20 and the second contactor 30 are controlled to be closed or opened according to the priority information, so that the first contactor 20 and the second contactor 30 are alternately used as the previous open contactor, thereby avoiding the first contactor 20 or the second contactor 30 from being influenced by the arc for a long time, and improving the service life of the first contactor 20 and the second contactor 30.
In this embodiment, by acquiring a current control request, the current control request includes priority information; wherein the priority information includes that one of the first contactor 20 and the second contactor 30 is a previously closed contactor and the other is a previously open contactor. When the number of uses of the first contactor 20 as the preceding open contactor reaches the first preset number of uses, the first contactor 20 is determined as the preceding closed contactor, the second contactor 30 is determined as the preceding open contactor, and the priority information is updated. When the number of uses of the second contactor 30 as the preceding open contactor reaches the first preset number of uses, the second contactor 30 is determined as the preceding closed contactor, the first contactor 20 is determined as the preceding open contactor, and the priority information is updated. When the number of uses of the first contactor 20 as the preceding open contactor reaches the second preset number of uses, the first contactor 20 is determined as the preceding closed contactor, the second contactor 30 is determined as the preceding open contactor, and the priority information is updated. When the number of times of use of the second contactor 30 as the preceding open contactor reaches the second preset number of times of use, then the second contactor 30 is determined as the preceding closed contactor, the first contactor 20 is determined as the preceding open contactor, the priority information is updated, and finally the first contactor 20 and the second contactor 30 are controlled to be closed or opened based on the priority information, so that the first contactor 20 and the second contactor 30 are alternately used as the preceding open contactor, the first contactor 20 or the second contactor 30 is prevented from being influenced by electric arcs for a long time, and the service lives of the first contactor 20 and the second contactor 30 are prolonged.
In one embodiment, the contactor control method further comprises: when the number of uses of the first contactor 20 as the prior closed contactor and the number of uses of the second contactor 30 as the prior closed contactor both reach the second preset number of uses, a target alarm signal is generated.
In this embodiment, when the number of times of use of the first contactor 20 as the previous closed contactor and the number of times of use of the second contactor 30 as the previous closed contactor reach the second preset number of times of use, the number of times of use of the first contactor 20 and the second contactor 30 reach the expected service life, a target alarm signal is generated to indicate that the first contactor 20 and the second contactor 30 are about to reach the expected service life through the target alarm signal, so that the safety and reliability in the use process of the first contactor 20 and the second contactor 30 are improved.
In one embodiment, as shown in fig. 2, in step S106, in the priority information, the first contactor 20 is a previously closed contactor, and the second contactor 30 is a previously opened contactor; based on the priority information, controlling the first contactor 20 and the second contactor 30 to be closed or opened includes:
s201: if the current control request is a closing request, a first control signal and a previous closing signal are output to control the first contactor 20 to be closed before, a second control signal and a subsequent closing signal are output to control the second contactor 30 to be closed after.
S202: if the current control request is a disconnection request, a third control signal and a preceding disconnection signal are output to control the second contactor 30 to be disconnected previously, and a fourth control signal and a following disconnection signal are output to control the first contactor 20 to be disconnected afterwards.
As an example, in step S201, the first control signal and the second control signal refer to signals for controlling the closing of one contactor, respectively. The prior closing signal refers to a signal for controlling the closing time of the prior closing contactor. The post-close signal refers to a signal for controlling the closing time of the post-close contactor. I.e. the first closing signal and the subsequent closing signal are used to control the closing sequence of the first contactor 20 and the second contactor 30, respectively. In this example, if the current control request is a closing request, a first control signal and a previous closing signal are output, the first contactor 20 is controlled to be closed before, a second control signal and a subsequent closing signal are output, and the second contactor 30 is controlled to be closed after, so as to protect the first contactor 20 from being affected by an arc, and improve the service life of the first contactor 20.
As an example, in step S202, the third control signal and the fourth control signal refer to signals for controlling the opening of one contactor, respectively. The previous off signal refers to a signal for controlling the off time of the previous off contactor. The post-disconnection signal refers to a signal for controlling the disconnection time of the post-disconnection contactor. I.e. a preceding disconnection signal and a following disconnection signal, respectively, are used to control the disconnection sequence of the first contactor 20 and the second contactor 30. In this example, if the current control request is an off request, a third control signal and a previous off signal are output, the second contactor 30 is controlled to be turned off before, a fourth control signal and a subsequent off signal are output, and the first contactor 20 is controlled to be turned off after, so as to protect the first contactor 20 from arc, and improve the service life of the first contactor 20.
In this embodiment, if the current control request is a closing request, a first control signal and a previous closing signal are output to control the first contactor 20 to be closed before, and a second control signal and a subsequent closing signal are output to control the second contactor 30 to be closed after. If the current control request is a disconnection request, a third control signal and a previous disconnection signal are output, the second contactor 30 is controlled to be disconnected in advance, a fourth control signal and a subsequent disconnection signal are output, and the first contactor 20 is controlled to be disconnected in the rear, so that the first contactor 20 is protected from being influenced by an electric arc, and the service life of the first contactor 20 is prolonged.
In one embodiment, as shown in fig. 3, in step S106, in the priority information, the second contactor 30 is a previously closed contactor, and the first contactor 20 is a previously opened contactor; based on the priority information, controlling the first contactor 20 and the second contactor 30 to be closed or opened includes:
s301: if the current control request is a closing request, a second control signal and a previous closing signal are output to control the second contactor 30 to be closed before, and a first control signal and a subsequent closing signal are output to control the first contactor 20 to be closed after.
S302: if the current control request is a disconnection request, a fourth control signal and a preceding disconnection signal are output to control the first contactor 20 to be disconnected previously, and a third control signal and a following disconnection signal are output to control the second contactor 30 to be disconnected afterwards.
In this embodiment, if the second contactor 30 is a previously closed contactor and the first contactor 20 is a previously opened contactor, if the current control request is a closing request, a first control signal and a previously closed signal are output to control the second contactor 30 to be previously closed, and a second control signal and a subsequently closed signal are output to control the first contactor 20 to be subsequently closed. If the current control request is a disconnection request, a third control signal and a previous disconnection signal are output, the first contactor 20 is controlled to be disconnected in advance, a fourth control signal and a subsequent disconnection signal are output, and the second contactor 30 is controlled to be disconnected in the rear, so that the second contactor 30 is protected from being influenced by an electric arc, and the service life of the second contactor 30 is prolonged.
In one embodiment, as shown in fig. 4, the contactor control method further includes:
s401: the timing control signal is output to the counter 60, and the counter 60 is controlled to record the corresponding target usage times of the first contactor 20 and the second contactor 30.
S402: the target number of uses output from the counter 60 is received.
S403: based on the target number of uses, the number of uses of the first contactor 20 as the prior closed contactor and the number of uses of the second contactor 30 as the prior closed contactor are determined.
As an example, in step S401, the control module 40 outputs a timing control signal to the counter 60, and the counter 60 records the target number of uses of the first contactor 20 and the second contactor 30 in response to the timing control signal.
As an example, in step S402, the counter 60 determines the target number of uses of the first contactor 20 and the second contactor 30 by recording the number of transmissions of the first control signal, the second control signal, and the previous close signal. The first contactor 20 is recorded to be closed once when the first control signal and the previous closing signal are recorded to be transmitted once, and the second contactor 30 is recorded to be closed once when the second control signal and the previous closing signal are recorded to be transmitted once. The first contactor 20 is closed once or the second contactor 30 is closed once as a single use number, thereby recording the corresponding target use numbers of the first contactor 20 and the second contactor 30 and outputting the target use numbers to the control module 40.
As an example, in step S403, the number of uses of the first contactor 20 as the preceding closed contactor and the number of uses of the second contactor 30 as the preceding closed contactor are determined based on the target number of uses. So as to determine whether the priority information needs to be updated based on the number of times the first contactor 20 is used as the prior closed contactor and the number of times the second contactor 30 is used as the prior closed contactor, so that the control module 40 can alternately control the first contactor 20 and the second contactor 30 as the prior open contactor according to the priority information to avoid the first contactor 20 or the second contactor 30 from being influenced by the arc for a long time, thereby improving the service lives of the first contactor 20 and the second contactor 30.
The embodiment provides a contactor control method, which is applied to a power supply system, wherein the power supply system comprises a power supply loop and a control module 40; the power supply loop comprises a first contactor 20 and a second contactor 30; the control end of the first contactor 20 and the control end of the second contactor 30 are respectively connected with the control module 40; as shown in fig. 5, the contactor control method includes the steps performed by the control module 40:
s501: a current control request is obtained, the current control request including priority information.
S502: if the priority information is that the first contactor 20 is a previously closed contactor and the second contactor 30 is a previously open contactor, the first contactor 20 is determined to be a previously open contactor, the second contactor 30 is determined to be a previously closed contactor, and the priority information is updated.
S503: if the priority information is that the first contactor 20 is a previously open contactor and the second contactor 30 is a previously closed contactor, the first contactor 20 is determined to be a previously closed contactor, the second contactor 30 is determined to be a previously open contactor, and the priority information is updated.
S504: based on the updated priority information, the first contactor 20 and the second contactor 30 are controlled to be closed or opened.
As an example, in step S501, the current control request refers to a request to control the first contactor 20 and the second contactor 30 to be closed or opened. The priority information refers to information for controlling the operation priorities of the first contactor 20 and the second contactor 30. In this embodiment, the current control request may be configured through a man-machine interface, and the priority information may be information configured through the man-machine interface, or may be information read from a database. Illustratively, the first contactor 20 may be configured as a prior closed contactor, the second contactor 30 may be a subsequent closed contactor, the second contactor 30 may be a prior open contactor, and the first contactor 20 may be a subsequent open contactor. The second contactor 30 may be configured as a preceding closed contactor, the first contactor 20 as a following closed contactor, the first contactor 20 as a preceding open contactor, and the second contactor 30 as a following open contactor. The first contactor 20 and the second contactor 30 are ensured to be closed or opened sequentially, and the closed contactor is opened first.
As an example, in step S502, since there is no current in the power supply loop when the preceding closed contactor is previously closed, no arc is generated to damage the preceding closed contactor, and when the following closed contactor is closed or when the following closed contactor is opened, i.e. when the preceding open contactor is opened, there is a current in the power supply loop, so an arc is generated, which may damage the contacts of the following closed contactor, affecting the following closed contactor. In the present example, when the priority information is that the first contactor 20 is a previously closed contactor and the second contactor 30 is a previously open contactor, then the first contactor 20 is determined to be a previously open contactor, the second contactor 30 is determined to be a previously closed contactor, and the priority information is updated. To prevent the second contactor 30 from being affected by the arc for a long time, thereby improving the life of the second contactor 30.
As an example, in step S503, if the priority information is that the first contactor 20 is a previously opened contactor and the second contactor 30 is a previously closed contactor, the first contactor 20 is determined as a previously closed contactor, the second contactor 30 is determined as a previously opened contactor, and the priority information is updated to prevent the first contactor 20 from being affected by an arc for a long time, thereby improving the life of the first contactor 20.
As an example, in step S504, the first contactor 20 and the second contactor 30 are controlled to be closed or opened based on the updated priority information such that the first contactor 20 and the second contactor 30 are alternately used as the previously opened contactors to avoid the first contactor 20 or the second contactor 30 from being affected by the arc for a long time, thereby improving the service lives of the first contactor 20 and the second contactor 30.
In this embodiment, the current control request includes priority information by acquiring the current control request. When the priority information is that the first contactor 20 is a previously closed contactor and the second contactor 30 is a previously open contactor, the first contactor 20 is determined to be a previously open contactor, the second contactor 30 is determined to be a previously closed contactor, and the priority information is updated. When the priority information is that the first contactor 20 is a previously opened contactor and the second contactor 30 is a previously closed contactor, the first contactor 20 is determined to be a previously closed contactor, the second contactor 30 is determined to be a previously opened contactor, and the priority information is updated. Finally, based on the updated priority information, the first contactor 20 and the second contactor 30 are controlled to be closed or opened, so that the first contactor 20 and the second contactor 30 are alternately used as the prior open contactors, thereby avoiding the first contactor 20 or the second contactor 30 from being influenced by electric arcs for a long time, and further prolonging the service lives of the first contactor 20 and the second contactor 30.
In one embodiment, as shown in fig. 6, the contactor control method further includes:
s601: the timing control signal is output to the counter 60, and the counter 60 is controlled to record the corresponding target usage times of the first contactor 20 and the second contactor 30.
S602: the target number of uses output from the counter 60 is received.
S603: and judging whether the target use times meet the target use conditions.
S604: and if the target use condition is not met, generating a target alarm signal.
As an example, in step S601 and step S602, similar to step S401 and step S402 in the above embodiment, a description thereof is omitted.
As an example, in step S603, the target use condition refers to a condition for determining whether the first contactor 20 and the second contactor 30 meet the expected lifetime.
As an example, in step S604, if it is determined that the target usage number does not meet the target usage condition, a target alarm signal is generated to indicate that the first contactor 20 and the second contactor 30 are about to reach the life expectancy through the target alarm signal, so as to improve the safety and reliability during the usage of the first contactor 20 and the second contactor 30. It should be noted that, if the number of times of target usage meets the target usage condition, the steps S501 to S504 are continuously performed, and the details are not repeated here.
In one embodiment, the target number of uses includes a first number of uses of the first contactor 20 and a second number of uses of the second contactor 30; judging whether the target use times meet the target use conditions or not comprises the following steps: if the first using times and the second using times are both larger than or equal to the target using times, determining that the target using times do not meet the target using conditions.
In this embodiment, the target usage frequency is a custom set frequency, which is used to determine whether the first contactor 20 and the second contactor 30 meet the expected life, and may be set according to practical experience, which is not described herein. If the first usage frequency and the second usage frequency are both greater than or equal to the target usage frequency, determining that the target usage frequency does not meet the target usage condition, and executing the step of generating a target alarm signal to indicate that the first contactor 20 and the second contactor 30 are about to reach the expected service life through the target alarm signal, thereby improving the safety and reliability of the first contactor 20 and the second contactor 30 in the use process.
The present embodiment provides a power supply system, as shown in fig. 7, including a power supply loop and a control module 40; the power supply loop comprises a first contactor 20 and a second contactor 30; the control end of the first contactor 20 and the control end of the second contactor 30 are respectively connected with the control module 40; the control module 40 is configured to perform the contactor control method described above, or the contactor control method described above.
In one embodiment, as shown in fig. 8, the power supply system further includes a counter 60; the counter 60 is connected to the control module 40, and is configured to receive the timing control signal output by the control module 40, and output the target usage number to the control module 40.
The embodiment provides an automobile, which comprises the power supply system.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
Claims (10)
1. The contactor control method is characterized by being applied to a power supply system, wherein the power supply system comprises a power supply loop and a control module; the power supply loop comprises a first contactor and a second contactor; the control end of the first contactor and the control end of the second contactor are respectively connected with the control module; the contactor control method comprises the steps executed by the control module:
Acquiring a current control request, wherein the current control request comprises priority information; wherein the priority information includes that one of the first contactor and the second contactor is a previously closed contactor and the other is a previously open contactor;
if the number of times of using the first contactor as the prior opening contactor reaches a first preset number of times of using, determining the first contactor as a prior closing contactor, determining the second contactor as a prior opening contactor, and updating the priority information;
if the usage frequency of the second contactor as the prior opening contactor reaches a first preset usage frequency, determining the second contactor as a prior closing contactor, determining the first contactor as a prior opening contactor, and updating the priority information;
if the number of times of using the first contactor as the prior opening contactor reaches a second preset number of times of using, determining the first contactor as the prior closing contactor, determining the second contactor as the prior opening contactor, and updating the priority information;
if the number of times of use of the second contactor as the prior open contactor reaches a second preset number of times of use, determining the second contactor as the prior closed contactor, determining the first contactor as the prior open contactor, and updating the priority information;
And controlling the first contactor and the second contactor to be closed or opened based on the priority information.
2. The contactor control method according to claim 1, further comprising:
and generating a target alarm signal when the number of times of using the first contactor as the prior closed contactor and the number of times of using the second contactor as the prior closed contactor reach the second preset number of times of using.
3. The contactor control method according to claim 1, wherein in the priority information, the first contactor is a previously closed contactor and the second contactor is a previously opened contactor;
the controlling the first contactor and the second contactor to be closed or opened based on the priority information includes:
if the current control request is a closing request, outputting a first control signal and a previous closing signal, controlling the first contactor to be closed before, outputting a second control signal and a subsequent closing signal, and controlling the second contactor to be closed after;
and if the current control request is a disconnection request, outputting a third control signal and a previous disconnection signal, controlling the second contactor to be disconnected before, outputting a fourth control signal and a subsequent disconnection signal, and controlling the first contactor to be disconnected after.
4. The contactor control method according to claim 1, wherein in the priority information, the second contactor is a previously closed contactor and the first contactor is a previously opened contactor;
the controlling the first contactor and the second contactor to be closed or opened based on the priority information includes:
if the current control request is a closing request, outputting a second control signal and a previous closing signal, controlling the second contactor to be closed before, outputting a first control signal and a subsequent closing signal, and controlling the first contactor to be closed after;
and if the current control request is a disconnection request, outputting a fourth control signal and a previous disconnection signal, controlling the first contactor to be disconnected before, outputting a third control signal and a subsequent disconnection signal, and controlling the second contactor to be disconnected after.
5. The contactor control method according to claim 3 or 4, wherein the contactor control method further comprises:
outputting a timing control signal to a counter, and controlling the counter to record corresponding target use times of the first contactor and the second contactor;
receiving the target use times output by the counter;
Based on the target number of uses, a number of uses of the first contactor as the prior closed contactor and a number of uses of the second contactor as the prior closed contactor are determined.
6. The contactor control method is characterized by being applied to a power supply system, wherein the power supply system comprises a power supply loop and a control module; the power supply loop comprises a first contactor and a second contactor; the control end of the first contactor and the control end of the second contactor are respectively connected with the control module; the contactor control method comprises the steps executed by the control module:
acquiring a current control request, wherein the current control request comprises priority information;
if the priority information is that the first contactor is a prior closed contactor and the second contactor is a prior open contactor, determining the first contactor as the prior open contactor, determining the second contactor as the prior closed contactor, and updating the priority information;
if the priority information is that the first contactor is a prior open contactor and the second contactor is a prior closed contactor, determining the first contactor as the prior closed contactor, determining the second contactor as the prior open contactor, and updating the priority information;
And controlling the first contactor and the second contactor to be closed or opened based on the updated priority information.
7. The contactor control method according to claim 6, further comprising:
outputting a timing control signal to a counter, and controlling the counter to record corresponding target use times of the first contactor and the second contactor;
receiving the target use times output by the counter;
judging whether the target use times meet the target use conditions or not;
and if the target use condition is not met, generating a target alarm signal.
8. The contactor control method according to claim 7, wherein the target number of uses includes a first number of uses of the first contactor and a second number of uses of the second contactor;
the judging whether the target use times meet the target use conditions comprises the following steps:
and if the first using times and the second using times are both larger than or equal to the target using times, determining that the target using times do not meet the target using conditions.
9. The power supply system is characterized by comprising a power supply loop and a control module; the power supply loop comprises a first contactor and a second contactor; the control end of the first contactor and the control end of the second contactor are respectively connected with the control module; the control module is configured to perform the contactor control method of any one of claims 1 to 5 or the contactor control method of any one of claims 6 to 8.
10. An automobile comprising the power supply system according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311478721.9A CN117183746B (en) | 2023-11-08 | 2023-11-08 | Contactor control method, power supply system and automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311478721.9A CN117183746B (en) | 2023-11-08 | 2023-11-08 | Contactor control method, power supply system and automobile |
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| CN117183746B true CN117183746B (en) | 2024-01-16 |
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| JP2012115045A (en) * | 2010-11-25 | 2012-06-14 | Mitsubishi Motors Corp | Charge control device of electric vehicle |
| CN106564391A (en) * | 2015-10-13 | 2017-04-19 | 北汽福田汽车股份有限公司 | High-voltage power battery contactor detection method and device, battery management system and automobile |
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| CN117183746A (en) | 2023-12-08 |
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