CN115184794B - Relay adhesion detection method and device for multi-cluster battery system - Google Patents
Relay adhesion detection method and device for multi-cluster battery system Download PDFInfo
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- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
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Abstract
The invention discloses a relay adhesion detection method of a multi-cluster battery system, which comprises the following steps: determining a bus cluster in a multi-cluster battery system according to the working state of the multi-cluster battery system; detecting the adhesion state of the relay in the bus cluster through the voltage difference or the loop current value of the front end and the rear end of the relay; and detecting the adhesion state of the relays in the rest battery clusters in the multi-cluster battery system through the current value of the loop. The invention can solve the problem that the adhesion fault detection cannot be carried out when the multi-cluster battery systems are connected in parallel, and can accurately detect the adhesion state of the relay in the multi-cluster battery system, reduce the overall operation risk of the system and avoid the overcharge and overdischarge phenomena of the multi-cluster battery system.
Description
Technical Field
The invention relates to the technical field of novel power energy storage systems, in particular to a relay adhesion detection method and device for a multi-cluster battery system.
Background
The existing large-scale energy storage system generally comprises a plurality of Pack packs (module management units (BMUs)) to form a single battery cluster (cluster management unit (BCU)), a plurality of battery clusters form a single battery stack (stack management unit (BSU)), and the plurality of battery stacks are arranged in a container and then communicate with an Energy Management System (EMS) to perform system charging and discharging management. The BCU is generally installed in a high-voltage box, wherein the high-voltage box also comprises a main negative relay, a main positive relay, a pre-charging resistor and a current sensor (a Hall or a shunt). Before the high voltage is electrified, the BCU needs to detect whether the main positive relay, the main negative relay and the pre-charging relay have adhesion faults or not, in the prior art scheme, generally, a high voltage sampling point is respectively arranged at the front end and the rear end of each relay, and when the voltage difference of the rear end voltage is more than 90 percent (which can be calibrated according to the total pressure detection precision) than that of the front end voltage under the condition of ensuring the disconnection of the relays, the relays are considered to have the adhesion faults. However, the disadvantages of this method are: when a cluster control management unit BCU high-voltage loop is closed, all cluster control management units BCUs are connected in parallel, so that the values of the high-voltage sampling points at two ends of the relays of other clusters except the cluster which is electrified at high voltage are equal to the total voltage value of the battery cluster, and the adhesion fault cannot be detected by using the method.
Disclosure of Invention
In order to solve the technical problems in the background art, the invention provides a relay adhesion detection method and equipment for a multi-cluster battery system, so that the adhesion state of a relay can be accurately detected in the multi-cluster battery system, and the overall operation risk of the system is reduced.
The invention provides a relay adhesion detection method of a multi-cluster battery system, which comprises the following specific steps:
determining a bus cluster in a multi-cluster battery system according to the working state of the multi-cluster battery system;
detecting the adhesion state of the relay in the bus cluster;
and detecting the adhesion state of the relays in the rest battery clusters in the multi-cluster battery system through the current value of the loop.
Further, a bus bar cluster in the multi-cluster battery system is determined, specifically as follows:
initializing the multi-cluster battery system;
sampling to obtain the voltage of each battery cluster in the multi-cluster battery system;
detecting the state of the high-voltage relay of each battery cluster to determine all the battery clusters without the state of the high-voltage relay;
and determining the battery cluster in the state of the non-break high-voltage relay corresponding to the minimum sampling voltage from the sampling voltages corresponding to all the battery clusters in the state of the non-break high-voltage relay, wherein the battery cluster in the state of the non-break high-voltage relay corresponding to the minimum sampling voltage is a bus cluster.
Furthermore, the relay in the bus cluster is detected through the voltage difference between the front end and the rear end of the relay, which is specifically as follows:
sampling to obtain the voltage of a relay to be tested in the bus cluster, comparing the voltage with a preset voltage, executing the next step when the voltage is not less than the preset voltage, and otherwise, repeating the step;
and acquiring the ratio of the rear end voltage to the front end voltage of the relay to be tested according to the sampling voltage of the front end and the rear end of the relay to be tested, comparing the ratio with a preset voltage ratio, and judging the state of the relay to be tested in the bus cluster according to a comparison result.
Furthermore, the relay in the bus cluster is detected through a loop current value, which specifically includes:
acquiring loop current of the bus cluster, setting high-voltage sampling points at the front end and the rear end of a relay to be tested in the bus cluster, and acquiring sampling voltage of the front end and the rear end of the relay to be tested;
and comparing the loop current of the bus cluster with a preset first current value, and judging the state of the relay to be tested in the bus cluster according to the comparison result.
Further, the state of the relay to be tested in the bus cluster is judged as follows:
when the rear end voltage ratio of the relay to be tested is not smaller than the front end voltage ratio, or the loop current of the bus cluster is larger than a preset first current value, the relay in the bus cluster is in an adhesion state, otherwise, the relay to be tested is not in the adhesion state.
Furthermore, the relays in the remaining battery clusters in the multi-cluster battery system are detected by the loop current value, which is specifically as follows:
disconnecting all the residual battery cluster loops, and acquiring the current value of the disconnected battery cluster loops;
and comparing the current value of the disconnected battery cluster loop with a preset second current value, wherein when the current value is greater than the preset second current value, the relay in the battery cluster corresponding to the current value is in an adhesion state, otherwise, the relay in the battery cluster corresponding to the current value is returned to be not in the adhesion state.
Furthermore, the preset voltage ratio is set according to the total voltage detection precision of the multi-cluster battery system;
the preset first current value and the preset second current value are set according to the precision difference of the current sensors.
A relay adhesion detection device for a multiple cluster battery system, the detection device comprising:
the clustering module is used for determining bus clusters in the multi-cluster battery system;
the first detection module is used for detecting the state of the relay in the bus cluster according to the voltage difference of the front end and the rear end of the relay or the current value of a loop;
and the second detection module is used for detecting the states of relays in the rest battery clusters except the bus cluster of the multi-cluster battery system according to the loop current value.
A storage medium having stored thereon a computer program arranged when executed to perform the method of any of the preceding claims.
An electronic device comprising a memory having a computer program stored therein and a processor arranged to run the computer program to perform the method as claimed in any one of the above.
Has the advantages that: compared with the prior art, the technical scheme of the invention has the following beneficial technical effects:
(1) According to the relay adhesion detection method for the multi-cluster battery system, all battery clusters can be divided by utilizing equipment in the existing high-voltage box under the condition that any high-voltage loop of the battery clusters is closed, and the divided battery clusters are respectively detected through voltage difference or loop current values of the front end and the rear end of the relay, so that the problem that adhesion fault detection cannot be carried out when the multi-cluster battery systems are connected in parallel can be solved, the adhesion state of the relay can be accurately detected in the multi-cluster battery system, the overall operation risk of the system is reduced, and the phenomenon of overcharge and overdischarge of the multi-cluster battery system is avoided;
(2) According to the relay adhesion detection method for the multi-cluster battery system, a direct-current high-voltage relay with an auxiliary contact is not needed, a hardware circuit is simple, a new hardware circuit is not needed, adhesion state detection can be carried out through equipment in an existing high-voltage box, and therefore system cost can be remarkably reduced.
Drawings
Fig. 1 is an energy storage system architecture diagram of an embodiment of a relay adhesion detection method for a multi-cluster battery system according to the present invention;
fig. 2 is a schematic flow chart of an embodiment of a relay adhesion detection method of a multi-cluster battery system according to the present invention;
fig. 3 is a single cluster system architecture diagram of an embodiment of a relay adhesion detection method for a multi-cluster battery system according to the present invention.
Detailed Description
The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
Example 1
The embodiment of the invention provides a relay adhesion detection method for a multi-cluster battery system, which can be applied to an electric ship system and can also be applied to the application fields of heavy truck automobiles and the like.
As shown in fig. 1, fig. 1 is an energy storage system architecture diagram of an embodiment of a relay adhesion detection method for a multi-cluster battery system according to the present invention. As can be seen from fig. 1: in the existing large-scale energy storage system, a battery cluster, namely a cluster control management unit BCU, is composed of a plurality of Pack packages, namely module management units BMU, a battery stack, namely a stack control management unit BSU, is composed of a plurality of battery clusters, namely the cluster control management unit BCU, a container is composed of a plurality of battery stacks, namely the stack control management unit BSU, and meanwhile, the container can be communicated with an energy management system EMS (energy management system) so as to manage charging and discharging of the large-scale energy storage system.
Referring to fig. 2, fig. 2 is a schematic flow chart of an embodiment of a relay adhesion detection method of a multi-cluster battery system according to the present invention. The embodiment of the invention provides a relay adhesion detection method for a multi-cluster battery system, which can be applied to an electric ship system and can also be applied to the application fields of heavy truck automobiles and the like.
Referring to fig. 2, as can be seen from fig. 2, an embodiment of the present invention provides a method for detecting adhesion of a relay in a multi-cluster battery system, where the method for detecting adhesion is specifically shown as follows:
step S1: according to the working state of the multi-cluster battery system, a bus cluster needing to be clear is determined from the multi-cluster battery system, and the specific process is as follows:
step S1.1: and carrying out low-voltage electrification on the BCU and carrying out system program initialization on the BCU, thereby ensuring that the logic states of all relays in the BCU are off states.
Step S1.2: a high-voltage sampling point is placed in each battery cluster loop in the multi-cluster battery system, the voltage of each battery cluster is obtained through the sampling point, and the sampled voltage of each battery cluster obtained through sampling is sent to a stack control management unit (BSU).
Step S1.3: since one stack management unit BSU is composed of a plurality of battery clusters, the stack management unit BSU can receive information of all the battery clusters composed thereof, such as the states of the high voltage relays in each battery cluster.
It should be noted that, in this embodiment, the stack management unit BSU determines all the battery clusters without serious faults by detecting the states of the high-voltage relays uploaded by all the battery clusters formed by the stack management unit BSU. In particular, a battery cluster without serious faults is referred to herein, i.e., a battery cluster without a fault of the high-voltage relay.
Step S1.4: from step S1.3, the stack management unit BSU can determine all the battery clusters in the uninterruptible high voltage relay state from all the battery clusters. In step S1.2, the sampled voltages of all the battery clusters that are formed are sent to the stack management unit BSU, so that the stack management unit BSU can determine the sampled voltages corresponding to all the battery clusters that are in the uninterruptible high-voltage relay state, and sequence the determined sampled voltages. In this embodiment, the sampling voltages are sorted in the descending order, and the battery cluster in the no-break high-voltage relay state corresponding to the minimum sampling voltage is determined according to the size of the sorted sampling voltages, and at this time, the battery cluster in the no-break high-voltage relay state corresponding to the minimum sampling voltage is the bus cluster to be determined.
It should be noted that the ordering order is not fixed, and the ordering may be performed according to other orders, and there is no particular ordering requirement.
Step S2: and (5) detecting the relay in the bus cluster determined in the step (S1.4) through the voltage difference of the front end and the rear end of the relay or the current value of the loop. Referring to fig. 3, fig. 3 is a single cluster system architecture diagram of an embodiment of a relay adhesion detection method for a multi-cluster battery system according to the present invention. Specifically, in this embodiment, a relay state detection process in the bus bar cluster in step S2 will be described with reference to the single cluster system architecture diagram in fig. 3, specifically as follows:
step S2.1: referring to fig. 3, in this embodiment, the back-end sampling voltage V1 of the pre-charge relay is obtained through sampling by the voltmeter, and the back-end sampling voltage V1 of the pre-charge relay is compared with the preset voltage. Specifically, when the back end sampling voltage V1 of the pre-charge relay is not less than the preset voltage, the next step S2.2 is executed. When the rear end sampling voltage V1 of the pre-charging relay is less than the preset voltage, repeating the step S2.1 until the rear end sampling voltage V1 of the pre-charging relay is not less than the preset voltage.
It should be noted that, in the present embodiment, the preset voltage is set to 30V, which can be modified according to actual measurement and is not unique. If the rear-end sampling voltage V1 of the pre-charging relay is less than 30V, it may be considered that the connection line of the rear-end voltage sampling point of the pre-charging relay is not tightly connected or not connected, and it is inconvenient to continue to execute the next step S2.2, so it is necessary to wait until the rear-end sampling voltage V1 of the pre-charging relay is not less than 30V, and then continue to execute the next step S2.2.
Step S2.2: and (3) sampling and acquiring the loop current in the bus cluster determined in the step (S1.4) through measuring devices such as a Hall current sensor or a shunt, and taking the loop current as a judgment basis in the next step (S2.3) to perform judgment processing.
Meanwhile, high-voltage sampling points can be arranged at the front end and the rear end of the relay to be tested in the bus cluster, the sampling voltages of the front end and the rear end of the relay to be tested are obtained, and the sampling voltages can be used as judgment bases in the next step S2.3 to perform judgment processing.
Step S2.3: and (3) comparing the loop current obtained in the step (S2.2) with a preset first current value, or determining the ratio between the rear end voltage and the front end voltage of the relay to be tested according to the front and rear end sampling voltage of the relay to be tested, and comparing the ratio with the preset voltage ratio. And finally, judging the state of the relay to be tested in the bus cluster according to the comparison result.
In the present embodiment, the preset first current value may be set according to the accuracy difference of the selected measuring instrument, such as a current sensor, where the preset first current value is set to 5A. Meanwhile, the preset voltage ratio can be set according to the total voltage detection precision of the multi-cluster battery system, and the preset voltage ratio is set to be 90%.
Referring to fig. 3, as can be seen from fig. 3, the rear end sampling voltage V1 of the pre-charge relay and the rear end sampling voltage V3 of the main positive relay are equal potential levels, and the front end sampling voltage V2 of the pre-charge relay and the front end sampling voltage V4 of the main positive relay are equal potential levels. Similarly, the rear end sampling voltage V5 of the total negative relay and the rear end sampling voltage V3 of the total positive relay are equal potential levels, and the front end sampling voltage V6 of the total negative relay and the front end sampling voltage V4 of the total positive relay are equal potential levels. In this embodiment, the ratio between the rear end voltage and the front end voltage of the relay to be tested needs to be obtained, so the ratio of the rear end sampling voltage V1 of the pre-charge relay to the front end sampling voltage V2 of the pre-charge relay needs to be calculated, or the ratio of the rear end sampling voltage V3 of the total positive relay to the front end sampling voltage V4 of the total positive relay, or the ratio of the rear end sampling voltage V5 of the total negative relay to the front end sampling voltage V6 of the total negative relay needs to be calculated.
Specifically, one of the three ratios is selected optionally, and as long as any one of the ratios is not less than 90% of the preset voltage ratio, or the current value measured by the current sensor is greater than 5A of the preset first current value, it indicates that the relays in the bus cluster are in an adhesion state, the multi-cluster battery system cannot be powered on, and an alarm needs to be sent to inform maintenance personnel to perform troubleshooting. Otherwise, the relays to be tested in the bus cluster are not in an adhesion state, and the relays to be tested in the bus cluster are in a normal state.
And step S3: according to the fact that the relay to be tested in the bus cluster determined in the step S2.3 is not in the bonding state, it can be determined that one cluster of batteries in the rest of the battery clusters in the multi-cluster battery system is necessarily connected with the inverter PCS in the energy storage system, and therefore the loop voltage of the battery clusters is equal to the total voltage of the batteries, and the state of the relay cannot be detected by using the voltage difference of the front end and the rear end of the relay continuously. Therefore, the relay states in the remaining battery clusters in the multi-cluster battery system are detected through the loop current values, which are specifically as follows:
step S3.1: referring to fig. 1, as can be seen from fig. 1, since the battery clusters are distributed in parallel, when detecting the relay states in the remaining battery clusters, it is not necessary to perform individual detection on one cluster, but it is possible to perform detection simultaneously, as with the bus bar cluster. In the embodiment, the remaining battery cluster loops in the multi-cluster battery system are disconnected, and the current value of the disconnected battery cluster loops is obtained through measurement of the current sensor.
Step S3.2: and S3.1, comparing the obtained current value of the disconnected battery cluster loop with a preset second current value, wherein when the current value of the disconnected battery cluster loop is larger than the preset second current value, the relay in the battery cluster corresponding to the current value larger than the preset second current value is in an adhesion state, otherwise, the relay in the rest battery cluster is not in an adhesion state.
Specifically, the preset second current value may be set according to the difference in accuracy of the current sensor. In the present embodiment, the preset second current value is set to 5A. That is to say, when the current value of the disconnected battery cluster loop obtained by sampling is greater than 5A, it indicates that the relay in the battery cluster is in an adhesion state, the stack control management unit BSU needs to be notified, the stack control management unit BSU issues a power-down instruction, the battery cluster which has been powered up is powered down, meanwhile, the relay adhesion fault is sent to the energy management system EMS, and the energy management system EMS cuts off the inverter PCS in the energy storage system, so that no current output is ensured, and the risk of overcharge and overdischarge is prevented. And otherwise, the relays in the rest battery clusters are not in the bonding state.
Therefore, the relay adhesion detection method of the multi-cluster battery system provided by the embodiment of the invention can be used for dividing all the battery clusters by directly utilizing the existing equipment in the high-voltage box under the condition of not using a direct-current high-voltage relay with an auxiliary contact, and then respectively detecting the divided battery clusters through the voltage difference or the loop current value of the front end and the rear end of the relay, so that the adhesion state of the relay can be accurately detected in the multi-cluster battery system, the running risk of the multi-cluster battery system is reduced, and the phenomenon of overcharge and overdischarge of the multi-cluster battery system is avoided.
Example 2
The embodiment of the invention provides a relay adhesion detection device of a multi-cluster battery system, which comprises a clustering module, a first detection module and a second detection module, wherein the clustering module, the first detection module and the second detection module carry out information interaction. The details are as follows:
and the clustering module is used for determining bus clusters in the multi-cluster battery system. Specifically, in the clustering module, after the loop voltage corresponding to each battery cluster is obtained through sampling, the battery cluster with the disconnected high-voltage relay state is deleted, and then the minimum loop voltage is selected, wherein the battery cluster corresponding to the minimum loop voltage is the bus cluster.
Specifically, in the clustering module, a plurality of battery clusters in the multi-cluster battery system are divided into bus clusters and remaining battery clusters, the clustering module sends clustering results to the first detection module and the second detection module, the first detection module detects the bus clusters independently, and the second detection module detects the remaining battery clusters.
The first detection module is used for receiving the bus cluster information sent by the clustering module, detecting the state of the relay in the bus cluster according to the voltage difference of the front end and the rear end of the relay or the loop current value, and sending a detection result to the second detection module, so that the second detection module can operate conveniently. In this embodiment, the detection may be performed by two ways, i.e., a voltage difference between the front and rear ends of the relay or a loop current value.
Specifically, the loop current value in the bus bar cluster is sampled and obtained by a measuring device such as a hall current sensor or a shunt, and the obtained loop current is compared with a preset first current value. When the current value measured by the current sensor is larger than a preset first current value, the fact that the relay in the bus cluster is in an adhesion state is indicated, the first detection module sends out early warning, and the first detection module sends a detection result to the second detection module. Otherwise, the relays to be detected in the bus cluster are all in a normal state, and meanwhile, the first detection module can also send the detection result to the second detection module. It should be noted that the preset first current value may be set according to the accuracy difference of the selected measuring instrument, such as a current sensor, and is not unique.
Specifically, high-voltage sampling points are arranged at the front end and the rear end of the relay to be tested in the bus cluster, the front end and the rear end sampling voltages of the relay to be tested are obtained, and meanwhile, the ratio of the rear end voltage to the front end voltage of the relay to be tested is compared with the preset voltage ratio. When the ratio of the rear end voltage to the front end voltage of the relay to be detected is not less than the preset voltage ratio, the relay in the bus cluster is in an adhesion state, the first detection module sends out early warning, and the first detection module sends a detection result to the second detection module. Otherwise, the relays to be detected in the bus cluster are in a normal state, and meanwhile the first detection module can send the detection result to the second detection module. It is to be noted that the preset voltage ratio may be set according to the total voltage detection accuracy of the multi-cluster battery system, which is not unique.
And the second detection module is used for receiving the detection result signal sent by the first detection module and judging the specific running state of the first detection module according to the detection result signal. In this embodiment, the first detection module has two detection results, one detection result is that "the bus bar cluster has the adhesion state", one detection result is that "the bus bar cluster does not have the adhesion state", and these two kinds of detection results all can be sent to the second detection module simultaneously, but when the second detection module received be "the bus bar cluster does not have the adhesion state" the detection result signal, then the second detection module will not work, otherwise, when the second detection module received be "the bus bar cluster has the adhesion state", then the second detection module will detect the state of remaining battery cluster.
Specifically, the second detection module is used for detecting the states of relays in the remaining battery clusters of the multi-cluster battery system except the bus cluster according to the loop current value. In this embodiment, when the first detection module does not detect that the bus bar cluster is stuck, the remaining battery clusters need to be checked. Therefore, the loop current of the remaining battery clusters is sampled and obtained through a measuring device such as a current sensor or a current divider, and the loop current is compared with a preset second current value. It should be noted that the preset second current value can be set according to the precision difference of the current sensor, which is not unique. When the loop current is larger than a preset second current value, the relays in the remaining battery clusters are in an adhesion state, and the second detection module gives out early warning. Otherwise, the relays in the rest battery clusters are in a non-bonding state.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. A relay adhesion detection method of a multi-cluster battery system is characterized by comprising the following specific steps:
determining a bus cluster in a multi-cluster battery system according to the working state of the multi-cluster battery system;
detecting the adhesion state of the relay in the bus cluster;
detecting the adhesion state of relays in the rest battery clusters in the multi-cluster battery system through the current value of the loop;
determining a bus cluster in a multi-cluster battery system, which comprises the following specific steps:
initializing the multi-cluster battery system;
sampling to obtain the voltage of each battery cluster in the multi-cluster battery system;
detecting the state of the high-voltage relay of each battery cluster to determine all the battery clusters without the state of the high-voltage relay;
and determining the battery cluster in the state of the non-break high-voltage relay corresponding to the minimum sampling voltage from the sampling voltages corresponding to all the battery clusters in the state of the non-break high-voltage relay, wherein the battery cluster in the state of the non-break high-voltage relay corresponding to the minimum sampling voltage is a bus cluster.
2. The method for detecting the relay adhesion of the multi-cluster battery system according to claim 1, wherein the relays in the bus cluster are detected by a voltage difference between front and rear ends of the relays, and the method comprises the following specific steps:
sampling to obtain the voltage of a relay to be tested in the bus cluster, comparing the voltage with a preset voltage, executing the next step when the voltage is not less than the preset voltage, and otherwise, repeating the step;
and acquiring the ratio of the rear end voltage to the front end voltage of the relay to be tested according to the sampling voltages of the front end and the rear end of the relay to be tested, comparing the ratio with a preset voltage ratio, and judging the state of the relay to be tested in the bus cluster according to a comparison result.
3. The method for detecting the relay adhesion of the multi-cluster battery system according to claim 2, wherein the relay in the bus cluster is detected through a loop current value, specifically as follows:
acquiring loop current of the bus cluster, setting high-voltage sampling points at the front end and the rear end of a relay to be tested in the bus cluster, and acquiring sampling voltages at the front end and the rear end of the relay to be tested;
and comparing the loop current of the bus cluster with a preset first current value, and judging the state of the relay to be tested in the bus cluster according to the comparison result.
4. The method for detecting the adhesion of the relays of the multi-cluster battery system according to claim 3, wherein the state of the relay to be detected in the bus cluster is determined as follows:
when the rear end voltage ratio of the relay to be tested is not smaller than the preset voltage ratio or the loop current of the bus cluster is larger than a preset first current value, the relay in the bus cluster is in an adhesion state, otherwise, the relay to be tested is not in the adhesion state.
5. The method for detecting the relay adhesion of the multi-cluster battery system according to claim 3, wherein the relays in the remaining battery clusters in the multi-cluster battery system are detected through a loop current value, specifically as follows:
disconnecting the rest battery cluster loops, and acquiring the current value of the disconnected battery cluster loops;
and comparing the current value of the disconnected battery cluster loop with a preset second current value, wherein when the current value is greater than the preset second current value, the relay in the battery cluster corresponding to the current value is in an adhesion state, otherwise, the relay in the battery cluster corresponding to the current value is returned to be not in the adhesion state.
6. The relay adhesion detection method of the multi-cluster battery system according to claim 5, wherein the preset voltage ratio is set according to the total voltage detection accuracy of the multi-cluster battery system;
the preset first current value and the preset second current value are set according to the precision difference of the current sensors.
7. A relay sticking detection apparatus for a multi-cluster battery system using the relay sticking detection method for a multi-cluster battery system according to claim 1, the detection apparatus comprising:
the clustering module is used for determining a bus cluster in the multi-cluster battery system;
the first detection module is used for detecting the state of the relay in the bus cluster according to the voltage difference of the front end and the rear end of the relay or the current value of a loop;
and the second detection module is used for detecting the states of relays in the rest battery clusters except the bus cluster of the multi-cluster battery system according to the loop current value.
8. A storage medium, characterized in that a computer program is stored in the storage medium, which computer program is arranged to, when executed, perform the method of any of claims 1 to 6.
9. An electronic device comprising a memory and a processor, wherein the memory has a computer program stored therein, and the processor is configured to execute the computer program to perform the method of any of claims 1 to 6.
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| CN202211107163.0A CN115184794B (en) | 2022-09-13 | 2022-09-13 | Relay adhesion detection method and device for multi-cluster battery system |
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