CN116609665A - Contactor adhesion detection method - Google Patents
Contactor adhesion detection method Download PDFInfo
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- CN116609665A CN116609665A CN202310642003.4A CN202310642003A CN116609665A CN 116609665 A CN116609665 A CN 116609665A CN 202310642003 A CN202310642003 A CN 202310642003A CN 116609665 A CN116609665 A CN 116609665A
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- switch
- contactor
- voltage value
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- voltage
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- 238000001514 detection method Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000003745 diagnosis Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 19
- 238000010586 diagram Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0038—Circuits for comparing several input signals and for indicating the result of this comparison, e.g. equal, different, greater, smaller (comparing pulses or pulse trains according to amplitude)
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
- G01R31/67—Testing the correctness of wire connections in electric apparatus or circuits
Abstract
The application discloses a contactor adhesion detection method, and relates to the technical field of batteries. The method for detecting the adhesion of the contactor comprises the following steps: collecting first voltage values of positive and negative buses; controlling the on-off of the control switch according to a preset logic switch sequence so as to obtain a corresponding second voltage value; by comparing the first voltage value with the second voltage value; if equal, the main negative contactor is in a normal open state. The application solves the problems that the contactor is usually adopted to identify the on or off of the contactor by adopting the front and back voltage, the total voltage detection and the adhesion detection are combined together, but the logic of a detection circuit and a diagnosis circuit is more and more complex along with the increase of the number of the relays, and the adhesion detection of the negative relay is difficult.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a contactor adhesion detection method.
Background
When the load current of the main loop is cut off, the battery pack can cause adhesion phenomenon of the contact points, under the condition, abnormal electrification state of the circuit can be caused, danger is caused, and whether the contact points are adhered or not is detected before electrification in order to avoid abnormal electrification and eliminate potential safety hazards.
At present, the contactor is usually used for identifying the connection or disconnection of the contactor by adopting the front and rear voltage, and the total voltage detection and the adhesion detection are combined together, but with the increase of the number of the relays, the logic of a detection circuit and a diagnosis circuit is more and more complex, and the adhesion detection of the negative relay is also a difficult problem. In view of the above-mentioned problems, no effective solution has been proposed yet.
Disclosure of Invention
The application aims to: a method for detecting adhesion of a contactor is provided to solve the above problems in the prior art.
The technical scheme is as follows: a contactor adhesion detection method comprises the following steps:
collecting first voltage values of positive and negative buses;
controlling the on-off of the control switch according to a preset logic switch sequence so as to obtain a corresponding second voltage value;
by comparing the first voltage value with the second voltage value;
if equal, the main negative contactor is in a normal open state.
Preferably, collecting the first voltage values of the positive and negative buses includes:
a plurality of voltage dividing chip resistors are arranged on the positive bus and the negative bus.
Preferably, collecting the first voltage values of the positive and negative bus bars includes:
the first switch and the second switch are arranged in series, and the first switch and the second switch are closed;
when the collected first voltage value is a preset parameter value, the contactor is adhered.
Preferably, controlling the control switch to be turned on or off according to a preset logic switch sequence to obtain the corresponding second voltage value includes:
the control switch is connected with the rear end of the main negative contactor through a first channel;
the third switch and the fourth switch are arranged in series, the third switch and the fourth switch are closed, the second voltage value of the ADBMS_V2 is collected to be V2', and if the V2' is equal to the first voltage value, the main negative contactor is in a normal open state; otherwise, the main negative contactor is in an adhesion state.
Preferably, controlling the control switch to be turned on or off according to a preset logic switch sequence to obtain the corresponding second voltage value further includes:
the control switch is connected with the rear end of the main positive contactor through a second channel;
the third switch and the fourth switch are opened, the fifth switch and the sixth switch are closed, the voltage of the ADBMS_V1 is collected to be V1, and if V1 is equal to 0, the main positive contactor is in a normal open state; if V1 has a voltage value greater than 0, the main positive contactor is in a bonding state.
Preferably, the fifth switch and the sixth switch are turned off.
Preferably, the first channel includes: #m1-and #m2-, said #m1-and said #m2-being the same channel for detecting the main negative contactor.
Preferably, the second channel includes: and #M1+ and #M2+, the #M1-and the #M2-are the same channel for detecting the main positive contactor.
Preferably, the method further comprises: the main controller adopts an ADBMS main control chip.
The beneficial effects are that: in the embodiment of the application, a mode of collecting the voltage values of all paths is adopted, and the first voltage values of the positive and negative buses are collected; controlling the on-off of the control switch according to a preset logic switch sequence so as to obtain a corresponding second voltage value; by comparing the first voltage value with the second voltage value; if the voltage is equal, the main negative contactor is in a normal disconnection state, the purpose of contact adhesion detection of the contactor is achieved, the technical effect of judging the adhesion condition of the multi-path main positive contactor and the multi-path main negative contactor is achieved, the technical problem that the connection or disconnection of the main negative contactor is usually identified by adopting the front and back voltage of the contactor at present, the total voltage detection and the adhesion detection are combined together, but as the number of the relays is increased, the logic of a detection circuit and a diagnosis circuit is more and more complex, and the adhesion detection of the negative relay is difficult is solved.
Drawings
FIG. 1 is a schematic diagram of a method for detecting adhesion of a contactor according to a first embodiment of the present application;
FIG. 2 is an electrical schematic diagram of a master control chip according to the contactor adhesion detection method of the present application;
fig. 3 is a schematic electrical diagram of a switch according to the contactor adhesion detection method of the present application.
Description of the embodiments
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the application herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Furthermore, the terms "mounted," "configured," "provided," "connected," "coupled," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
According to an embodiment of the present application, as shown in fig. 1-3, there is provided a method for detecting adhesion of a contactor, which includes the following steps S101 to S104:
step 101, collecting first voltage values of positive and negative buses;
the first voltage values of the positive and negative buses are collected and can be used for making parameters of adhesion detection of the main positive and main negative contactors, so that an accurate data basis is provided for subsequent comparison actions.
According to an embodiment of the present application, preferably, collecting the first voltage values of the positive and negative buses includes:
a plurality of voltage dividing chip resistors are arranged on the positive bus and the negative bus.
Through being provided with a plurality of bleeder chip resistors in series on positive and negative generating lines, can realize good voltage acquisition effect. The chip resistor may be a 5.1m model 1206 resistor.
According to an embodiment of the present application, preferably, collecting the first voltage values of the positive and negative buses includes:
the first switch and the second switch are arranged in series, and the first switch and the second switch are closed;
when the collected first voltage value is a preset parameter value, the contactor is adhered.
The first switch and the second switch are connected with the main control chip through the ADBMS GP06, so that a good electrical control effect is achieved, the switch action is controlled through the main controller, and the first switch and the second switch are connected in series, so that the situation that a single optocoupler cannot meet the requirement at present when the voltage is very high can be avoided, and two optocouplers are higher in safety. And judging through the acquired first voltage value, and judging that the contactor is adhered when the first voltage value is the same as the preset parameter value, namely 2.35V. Wherein the first switch and the second switch remain in a normally closed state. Specifically, the first switch refers to U1, and the second switch refers to U2; the model numbers are HSSR-61A0D-2.
Step 102, controlling the on-off of the control switch according to a preset logic switch sequence so as to obtain a corresponding second voltage value.
The main controller is used for respectively controlling the switching action, so that the required second voltage value can be acquired, and a data basis is provided for subsequent judgment.
According to an embodiment of the present application, preferably, controlling the control switch to be turned on and off according to a preset logic switch sequence to obtain the corresponding second voltage value includes:
the control switch is connected with the rear end of the main negative contactor through a first channel;
the third switch and the fourth switch are arranged in series, the third switch and the fourth switch are used for conducting closing action, the second voltage value of the ADBMS_V2 is collected to be V2', and if the V2' is equal to the first voltage value, the main negative contactor is in a normal open state; otherwise, the main negative contactor is in an adhesion state.
The third switch and the fourth switch are connected with the main control chip through the ADBMS GP03, so that good electrical control effect is achieved, the third switch, the fourth switch, the first switch and the second switch are kept in a closed state, other switches are all in an opened state, good detection effect on the state of the main negative contactor can be achieved, and accurate judgment effect is achieved. Meanwhile, by arranging the third switch and the fourth switch in series, safety can be improved. Specifically, the third switch refers to U8 and the fourth switch refers to U10; the model numbers are HSSR-61A0D-2.
According to an embodiment of the present application, preferably, controlling the control switch to be turned on and off according to a preset logic switch sequence to obtain the corresponding second voltage value includes:
the control switch is connected with the rear end of the main negative contactor through a first channel;
the switches U7 and U9 are arranged in series, the switches U7 and U9 are closed, the second voltage value of the ADBMS_V2 is collected to be V2', and if the V2' is equal to the first voltage value, the main negative contactor is in a normal open state; otherwise, the main negative contactor is in an adhesion state.
The switch U7 and the switch U9 are connected with the main control chip through the ADBMS GP04, so that good electrical control effect is achieved, the switch is kept in a closed state except for the U7 and the switch U9, the first switch and the second switch, and other switches are all in an open state, the effect of detecting the adhesion state of the main contactor and the negative contactor can be achieved equally, the effect of detecting a plurality of channels is achieved, and the detection efficiency is improved.
According to an embodiment of the present application, preferably, the first channel includes: #m1-and #m2-, said #m1-and said #m2-being the same channel for detecting the main negative contactor.
The effect of multichannel detection can be realized, so that the detection efficiency of adhesion of the main negative contactor is improved.
According to an embodiment of the present application, preferably, controlling the on/off of the control switch according to a preset logic switch sequence to obtain the corresponding second voltage value further includes:
the control switch is connected with the rear end of the main positive contactor through a second channel;
the third switch and the fourth switch are opened, the fifth switch and the sixth switch are closed, the voltage of the ADBMS_V1 is collected to be V1, and if V1 is equal to 0, the main positive contactor is in a normal open state; if V1 has a voltage value greater than 0, the main positive contactor is in a blocking state.
The third switch and the fourth switch are respectively connected with the main control chip through the ADBMS GP01 and the ADBMS GP02, so that good electrical control effect is achieved, except that the fifth switch, the sixth switch, the first switch and the second switch are kept in a closed state, the other switches are all in an opened state, the effect of detecting the state of the main positive contactor can be achieved, and therefore accurate judging effect is achieved. By providing the fifth switch and the sixth switch in series, safety can be improved. Wherein the fifth switch is U3 and the sixth switch is U5; or the fifth switch means U4 and the sixth switch means U6; the model numbers are HSSR-61A0D-2.
According to an embodiment of the present application, preferably, the second channel includes: and #M1+ and #M2+, the #M1-and the #M2-are the same channel for detecting the main positive contactor.
The effect of multichannel detection can be realized, so that the detection efficiency of adhesion of the main positive contactor is improved.
According to an embodiment of the present application, it is preferable that the fifth switch and the sixth switch are turned off.
And finishing the action of collecting the second voltage value, so that the circuit is in a state of continuously collecting the voltage values of the positive bus and the negative bus.
Step 103, comparing the first voltage value with the second voltage value.
By comparing the two voltage values, the adhesion state of the contactor can be judged, so that the effect of automatic detection is realized.
Step 104, if the two are equal, the main negative contactor is in a normal open state.
The accurate judgment result can be obtained, and meanwhile, the adhesion position of the contactor can be accurately known.
According to an embodiment of the present application, preferably, the method further includes: the main controller adopts an ADBMS main control chip.
Good logic control effect can be realized, so that accurate switching and control effects are realized.
From the above description, it can be seen that the following technical effects are achieved:
in the embodiment of the application, a mode of collecting the voltage values of all paths is adopted, and the first voltage values of the positive and negative buses are collected; controlling the on-off of the control switch according to a preset logic switch sequence so as to obtain a corresponding second voltage value; by comparing the first voltage value with the second voltage value; if the voltage is equal, the main negative contactor is in a normal disconnection state, the purpose of contact adhesion detection of the contactor is achieved, the technical effect of judging the adhesion condition of the multi-path main positive contactor and the multi-path main negative contactor is achieved, the technical problem that the connection or disconnection of the main negative contactor is usually identified by adopting the front and back voltage of the contactor at present, the total voltage detection and the adhesion detection are combined together, but as the number of the relays is increased, the logic of a detection circuit and a diagnosis circuit is more and more complex, and the adhesion detection of the negative relay is difficult is solved.
The application also has the following beneficial effects:
1. the adhesion condition of the multi-path main positive and main negative contactors can be judged;
2. the adhesion state of the main negative contactor can be judged under the condition that the high-voltage device is not operated.
3. The adhesion degree of the contactor can be judged according to the collected different voltages.
The preferred embodiments of the present application have been described in detail above with reference to the accompanying drawings, but the present application is not limited to the specific details of the above embodiments, and various equivalent changes can be made to the technical solutions of the present application within the scope of the technical concept of the present application, and these equivalent changes all fall within the scope of the present application.
Claims (8)
1. The method for detecting the adhesion of the contactor is characterized by comprising the following steps: collecting first voltage values of positive and negative buses; controlling the on-off of the control switch according to a preset logic switch sequence so as to obtain a corresponding second voltage value; the control switch is connected with the rear end of the main negative contactor through a first channel;
the third switch and the fourth switch are arranged in series, the third switch and the fourth switch are closed, the second voltage value of the ADBMS_V2 is collected to be V2', and if the V2' is equal to the first voltage value, the main negative contactor is in a normal open state; otherwise, the main negative contactor is in an adhesion state;
by comparing the first voltage value with the second voltage value; if equal, the main negative contactor is in a normal open state.
2. The contactor adhesion detection method according to claim 1, wherein collecting the first voltage values of the positive and negative bus bars comprises: a plurality of voltage dividing chip resistors are arranged on the positive bus and the negative bus.
3. The contactor adhesion detection method according to claim 1, wherein collecting the first voltage values of the positive and negative bus bars comprises: the first switch and the second switch are arranged in series, and the first switch and the second switch are closed; when the collected first voltage value is a preset parameter value, the contactor is adhered.
4. The method of claim 1, wherein controlling the control switches to open and close according to a predetermined logic switch sequence to obtain the corresponding second voltage value further comprises: the control switch is connected with the rear end of the main positive contactor through a second channel;
the third switch and the fourth switch are opened, the fifth switch and the sixth switch are closed, the voltage of the ADBMS_V1 is collected to be V1, and if V1 is equal to 0, the main positive contactor is in a normal open state; if V1 has a voltage value greater than 0, the main positive contactor is in a bonding state.
5. The method of claim 4, wherein the fifth switch and the sixth switch are turned off.
6. The contactor adhesion detection method according to claim 1, wherein the first channel includes: #m1-and #m2-, said #m1-and said #m2-being the same channel for detecting the main negative contactor.
7. The contactor adhesion detection method according to claim 6, wherein the second passage includes: and #M1+ and #M2+, wherein #M1-and #M2-are the same channel for detecting the main positive contactor.
8. The contactor adhesion detection method according to claim 1, further comprising: the main controller adopts an ADBMS main control chip.
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| CN202310642003.4A CN116609665B (en) | 2023-06-01 | 2023-06-01 | Contactor adhesion detection method |
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| CN202310642003.4A CN116609665B (en) | 2023-06-01 | 2023-06-01 | Contactor adhesion detection method |
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| WO2022227659A1 (en) * | 2021-04-26 | 2022-11-03 | 中国第一汽车股份有限公司 | Independent diagnosis apparatus and method for high-voltage contactor of traction battery system |
| CN116094095A (en) * | 2022-09-22 | 2023-05-09 | 阳光电源股份有限公司 | Energy storage converter, slow start module thereof and contactor adhesion judgment method |
| CN115629308A (en) * | 2022-11-17 | 2023-01-20 | 北京睿行智控科技有限公司 | Diagnosis circuit, diagnosis method and system for working state of power battery pack contactor |
| CN219016516U (en) * | 2022-12-01 | 2023-05-12 | 中国重汽集团济南动力有限公司 | Electric automobile contactor adhesion detection device |
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