CN115184794A - 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
- Publication number
- CN115184794A CN115184794A CN202211107163.0A CN202211107163A CN115184794A CN 115184794 A CN115184794 A CN 115184794A CN 202211107163 A CN202211107163 A CN 202211107163A CN 115184794 A CN115184794 A CN 115184794A
- Authority
- CN
- China
- Prior art keywords
- cluster
- relay
- voltage
- battery
- battery system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- G01R31/327—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
- G01R31/3278—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 of relays, solenoids or reed switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses 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 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 of 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 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.
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 both set according to the precision difference of the current sensor.
A relay adhesion detection device for a multiple cluster battery system, the detection device 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 state of the relay in the remaining 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 of any 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, under the condition that any one battery cluster high-voltage loop is closed, all battery clusters can be divided by using equipment in the existing high-voltage box, and the divided battery clusters are respectively detected through the voltage difference or the loop current value 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) The relay adhesion detection method of the multi-cluster battery system provided by the invention does not need to use a direct-current high-voltage relay with an auxiliary contact, has simple hardware circuit, does not need to add a new hardware circuit, and can detect the adhesion state through equipment in the existing high-voltage box, thereby obviously reducing the system cost.
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 flowchart illustrating an embodiment of a method for detecting adhesion of a relay in 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 sequenced from large to small, and the battery cluster in the non-interrupted high-voltage relay state corresponding to the minimum sampling voltage is determined according to the sequenced sampling voltages, and at this time, the battery cluster in the non-interrupted 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 (4) 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, the 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 detected in the bus cluster is not in the bonding state determined in the step S2.3, it can be determined that one cluster of batteries is connected with the inverter PCS in the energy storage system in the rest of the battery clusters in the multi-cluster battery 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 continuously by using the voltage difference of the front end and the rear end of the relay. 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 shown as follows:
step S3.1: referring to fig. 1, as can be seen from fig. 1, the battery clusters are distributed in parallel, so that when the relay states in the remaining battery clusters are detected, it is not necessary to perform individual detection on one cluster and one cluster as in the case of the bus bar cluster, and the detection can be performed simultaneously. In this 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 (4) comparing the current value of the disconnected battery cluster loop obtained in the step (S3.1) with a preset second current value, wherein when the current value of the disconnected battery cluster loop is greater than the preset second current value, the relay in the battery cluster corresponding to the current value greater than the preset second current value is in an adhesion state, otherwise, the relay in the rest battery cluster is in a non-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 directly utilize the equipment in the existing high-voltage box to divide all the battery clusters without using the direct-current high-voltage relay with the auxiliary contact, and then respectively detect 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 a bus cluster and a remaining battery cluster, the clustering module sends clustering results to the first detection module and the second detection module, the first detection module detects the bus cluster alone, and the second detection module detects the remaining battery cluster.
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 the 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 between the rear end voltage and 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 all in a normal state, and meanwhile, the first detection module can also 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 "there is an adhesion state in the bus bar cluster", one detection result is that "there is not an adhesion state in the bus bar cluster", these two kinds of detection results all can be sent to the second detection module simultaneously, but when the second detection module received is that "there is not an adhesion state in the bus bar cluster" the detection result signal, then the second detection module will not work, otherwise, when the second detection module received is that "there is an adhesion state in the bus bar cluster", 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 relay in the remaining battery cluster is in an adhesion state, and the second detection module sends 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 (10)
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;
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.
2. The method for detecting the relay adhesion of the multi-cluster battery system according to claim 1, wherein a bus bar cluster in the multi-cluster battery system is determined 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.
3. The method for detecting the relay adhesion of the multi-cluster battery system according to claim 1 or 2, wherein the relay in the bus cluster is detected by a voltage difference between front and rear ends of the relay, 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 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.
4. The method for detecting the relay adhesion of the multi-cluster battery system according to claim 3, 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.
5. The method for detecting the adhesion of the relays of the multi-cluster battery system according to claim 4, 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 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.
6. The method for detecting the relay adhesion of the multi-cluster battery system according to claim 4, wherein the relays in the remaining battery clusters in the multi-cluster battery system are detected by a loop current value, 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.
7. The relay adhesion detection method of the multi-cluster battery system according to claim 6, wherein the preset voltage proportion 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 both set according to the precision difference of the current sensor.
8. A relay adhesion detection device of a multi-cluster battery system, the detection device 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 state of the relay in the remaining battery clusters except the bus cluster of the multi-cluster battery system according to the loop current value.
9. 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 7.
10. An electronic device comprising a memory and a processor, wherein the memory has stored therein a computer program, and wherein the processor is arranged to execute the computer program to perform the method of any of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211107163.0A CN115184794B (en) | 2022-09-13 | 2022-09-13 | Relay adhesion detection method and device for multi-cluster battery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211107163.0A CN115184794B (en) | 2022-09-13 | 2022-09-13 | Relay adhesion detection method and device for multi-cluster battery system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115184794A true CN115184794A (en) | 2022-10-14 |
| CN115184794B CN115184794B (en) | 2022-12-13 |
Family
ID=83524559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211107163.0A Active CN115184794B (en) | 2022-09-13 | 2022-09-13 | Relay adhesion detection method and device for multi-cluster battery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115184794B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014051956A (en) * | 2012-09-10 | 2014-03-20 | Nissan Motor Co Ltd | Control apparatus for vehicle |
| CN104793135A (en) * | 2015-05-06 | 2015-07-22 | 科力远（上海）汽车动力电池系统有限公司 | Hybrid electric vehicle relay state detection circuit and method thereof |
| CN105137336A (en) * | 2015-07-29 | 2015-12-09 | 南通大学 | Diagnostic circuit and diagnostic method for detecting electric vehicle high-voltage relay fault |
| CN105527567A (en) * | 2016-01-27 | 2016-04-27 | 惠州市蓝微新源技术有限公司 | High voltage relay adhesion detection circuit of battery management system and detection method |
| CN107171382A (en) * | 2017-05-19 | 2017-09-15 | 宁德时代新能源科技股份有限公司 | Battery pack charging system and method |
-
2022
- 2022-09-13 CN CN202211107163.0A patent/CN115184794B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014051956A (en) * | 2012-09-10 | 2014-03-20 | Nissan Motor Co Ltd | Control apparatus for vehicle |
| CN104793135A (en) * | 2015-05-06 | 2015-07-22 | 科力远（上海）汽车动力电池系统有限公司 | Hybrid electric vehicle relay state detection circuit and method thereof |
| CN105137336A (en) * | 2015-07-29 | 2015-12-09 | 南通大学 | Diagnostic circuit and diagnostic method for detecting electric vehicle high-voltage relay fault |
| CN105527567A (en) * | 2016-01-27 | 2016-04-27 | 惠州市蓝微新源技术有限公司 | High voltage relay adhesion detection circuit of battery management system and detection method |
| CN107171382A (en) * | 2017-05-19 | 2017-09-15 | 宁德时代新能源科技股份有限公司 | Battery pack charging system and method |
Non-Patent Citations (1)
| Title |
|---|
| 赵娜 等: "磷酸铁锂动力电池组的主动均衡电路设计与控制策略", 《电子设计工程》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115184794B (en) | 2022-12-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9108521B2 (en) | Battery control apparatus and method | |
| US9529053B2 (en) | Battery management system and method for determining the charge state battery cells, battery and motor vehicle comprising a battery management system | |
| EP3757594B1 (en) | Current sensor diagnosing apparatus and method | |
| CN207488463U (en) | A kind of battery system off-line detection system | |
| CN110462969B (en) | Monitoring device and power storage system | |
| CN109302852A (en) | Managing device and power-supply system | |
| KR20090129212A (en) | Trouble diagnosis method of current sensor for high voltage battery system | |
| CN104407301A (en) | Dynamic intelligent detection device and detection method for storage battery of electric automobile | |
| CN207481815U (en) | Electric system above and below electric automobile high-voltage | |
| EP4099034A1 (en) | Relay diagnosis device, relay diagnosis method, battery system, and electric vehicle | |
| CN106655301A (en) | Power management system and method suitable for electric fork-lift truck | |
| CN212967804U (en) | Retired power battery management system | |
| CN117096976A (en) | Lead-acid battery electric quantity monitoring system, method, electronic equipment and storage medium | |
| CN115184794B (en) | Relay adhesion detection method and device for multi-cluster battery system | |
| Kilic et al. | Design of master and slave modules on battery management system for electric vehicles | |
| CN111384751A (en) | Charge-discharge management system of lithium battery pack | |
| Baronti et al. | Hardware building blocks of a hierarchical battery management system for a fuel cell HEV | |
| CN113067042B (en) | Energy storage device and fault prediction and diagnosis method | |
| US20240042863A1 (en) | Method and Equipment for Monitoring a Failure in a High-Voltage Circuit of a Vehicle, and High-Voltage Circuit System | |
| CN113631938B (en) | Method and system for detecting connection failure of parallel battery cells | |
| CN205453185U (en) | Simulated acquisition ware | |
| KR20210058717A (en) | Diagnosing Apparatus for Malfunction of Switch means included in Multi Battery Pack and Method thereof | |
| CN114556739A (en) | Individual discharge system and method for battery rack | |
| KR20210102852A (en) | Battery diagnosis apparatus and vehicle | |
| CN113874741B (en) | Apparatus and method for diagnosing failure, battery management system and electric drive mechanism |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |