CN115421039A - Battery system insulation performance online detection method - Google Patents
Battery system insulation performance online detection method Download PDFInfo
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- CN115421039A CN115421039A CN202211224357.9A CN202211224357A CN115421039A CN 115421039 A CN115421039 A CN 115421039A CN 202211224357 A CN202211224357 A CN 202211224357A CN 115421039 A CN115421039 A CN 115421039A
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- Prior art keywords
- battery system
- insulation performance
- grounding wire
- detection method
- communication unit
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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]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/08—Measuring resistance by measuring both voltage and current
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention relates to the technical field of insulation detection, and discloses an on-line detection method for the insulation performance of a battery system, which comprises the following steps of firstly, isolating the battery system from the ground in a physical separation mode; connecting the battery system with a grounding wire of the electric equipment through the grounding wire; and then the insulation performance of the battery system is judged by detecting the leakage current on the grounding wire. The battery system comprises one or more of an outer case and a rack, wherein a single outer case or rack is respectively connected with a grounding wire, and a single grounding wire of the outer case or rack is connected with a current detection transmitter. The current detection transmitter comprises an MCU unit, an electric leakage sensor is connected with the input end of the MCU unit, the output end of the MCU unit is connected with a communication unit, the communication unit is connected with a monitoring end, and the monitoring end comprises a server connected with the communication unit. The invention can accurately detect the leakage current on the grounding wire and realize on-line monitoring.
Description
Technical Field
The invention relates to the technical field of insulation detection, in particular to an on-line detection method for the insulation performance of a battery system.
Background
At present, the insulation performance of the industrial battery system is detected in two ways: a voltage-to-ground mode and a signal injection mode. Two existing methods for measuring the insulation performance are normally used when the battery system is not electrically connected to an external consumer. However, after the battery system is connected with external electric equipment, the positive electrode and the negative electrode of the battery system are electrically connected with the ground due to the problem of the working mode of the electric equipment, so when the insulation performance is measured by using the two methods, the serious low insulation resistance of the positive electrode and the negative electrode of the battery system to the ground is detected, and the measurement is abnormal. In addition, the two detection methods cannot realize online detection, so that an online detection method for the insulation performance of the battery system is needed.
Disclosure of Invention
The invention aims to provide an on-line detection method for the insulation performance of a battery system. The invention is realized by the following steps:
the method comprises the following steps:
S 1 : firstly, isolating the battery system from the ground in a physical separation mode; particularly, the isolation is realized by adopting an isolation pad.
S 2 : connecting the battery system with a grounding wire of the electric equipment through the grounding wire;
S 3 : and then the insulation performance of the battery system is judged by detecting the leakage current on the grounding wire.
Furthermore, the battery system comprises one or more of an outer case and a rack, wherein a single outer case or rack is respectively connected with a grounding wire, and a single grounding wire of the outer case or rack is respectively connected with a current detection transmitter.
Further, the current detection changer includes the MCU unit, with the input of MCU unit is connected with leakage sensor, the output of MCU unit is connected with the communication unit, the communication unit is connected with the control end, the control end include with the server that the communication unit is connected, the server is connected with PC end or intelligent terminal, and the output of server is connected with electrical switch floodgate and early warning device respectively. The early warning device is an acousto-optic early warning device.
The communication unit adopts a CAN bus or RS485 communication. The server comprises one or more of a battery management system, a dynamic loop system and a fire fighting system. The intelligent terminal is a plurality of intelligent mobile phones or tablet computers.
The server calculates the insulation resistance (insulation resistance = total voltage of battery system/leakage current) according to the leakage current, and the server judges whether corresponding action is required according to the calculated insulation resistance and the requirement for the insulation resistance in the relevant national standard.
Furthermore, the leakage sensor is a CHDC-LTHA-20mA type sensor, and the MCU unit is an S9KEAZ128AMLH type MCU unit.
Compared with the prior art, the invention has the beneficial effects that:
the battery system is isolated from the ground, the grounding wire of the battery system is connected with the grounding wire of an electric appliance, and the leakage current on the grounding wire can be accurately detected through the detection transmitter connected in series on the grounding wire.
When the battery system has electric leakage to the ground, a voltage signal generated by a leakage current sensor connected in series to the ground wire is processed by the MCU, a leakage current value is uploaded to the server through the communication unit, the server calculates an insulation resistance (the insulation resistance = total voltage of the battery system/leakage current) according to the leakage current, and the server judges whether corresponding action is needed to be performed according to the calculated insulation resistance and the requirement on the insulation resistance in relevant national standards, for example, an alarm prompt is performed through an early warning device, or the operation of controlling an electric switch gate to cut off an electric loop is performed.
The method solves the defect that the measurement is abnormal when the traditional method for measuring the insulation performance detects that the insulation resistance of the positive electrode and the negative electrode of the battery system to the ground is seriously low. And the online detection of the electric leakage of the battery system is realized. The intelligent terminal or the PC terminal is convenient for workers to connect the server to check the monitored data value in the server, and online detection and online monitoring are achieved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram of the system apparatus of the present invention;
FIG. 2 is a schematic diagram of a process system of the present invention;
FIG. 3 is a circuit diagram of the MCU of the present invention;
FIG. 4 is a circuit diagram of the signal conditioning circuit of the present invention;
FIG. 5 is a voltage reference circuit diagram;
fig. 6 is a communication circuit diagram.
Wherein, the current detection transmitter 1, the isolation pad 2, the battery system grounding wire 3, the electrical appliance grounding wire 4,
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1-6, a method for on-line detecting the insulation performance of a battery system,
S 1 : firstly, isolating the battery system from the ground in a physical separation mode; particularly, the isolation is realized by adopting an isolation pad.
S 2 : connecting the battery system with a grounding wire of the electric equipment through the grounding wire;
S 3 : and then the insulation performance of the battery system is judged by detecting the leakage current on the grounding wire.
In this embodiment, the battery system includes one or more of an outer case and a rack, and a single outer case or rack is respectively connected with a ground wire, and a single current detection transmitter is connected to the ground wire of the outer case or rack.
In this embodiment, the current detection changer includes the MCU unit, with the input of MCU unit is connected with leakage sensor, the output of MCU unit is connected with the communication unit, the communication unit is connected with the control end, the control end include with the server that the communication unit is connected, the server is connected with PC end or intelligent terminal, and the output of server is connected with electrical switch floodgate and early warning device respectively. The early warning device is an acousto-optic early warning device.
The communication unit adopts CAN bus or RS485 communication. The server comprises one or more of a battery management system, a dynamic loop system and a fire fighting system. The intelligent terminal is a plurality of intelligent mobile phones or tablet computers.
The insulation resistance (insulation resistance = total voltage of battery system/leakage current) is calculated by the server from the leakage current,
and the server judges whether corresponding action is required to be performed according to the calculated insulation resistance and the requirement on the insulation resistance in the relevant national standard.
In this embodiment, the leakage sensor is a CHDC-LTHA-20mA type sensor, and the MCU unit is an S9KEAZ128AMLH type MCU unit.
In this embodiment, as shown in fig. 3, a reset circuit of the MCU, which is composed of R28, D5, and C35, performs power-on reset for the MCU through R29, and R27 and R30 are firmware burning ports of the MCU. Pins 7, 8, 9, 10, 40, 41 of the MCU are power and ground. Y1, C40, C41, and R31 are external crystal oscillator circuits. R33 is an external interrupt lock resistor. R32, D6, R34 and D7 are status indicator lamp circuits. CAN _ TX/CAN _ RX is the CAN communication output signal. RXD1, TXD1, TE1, RXD2, TXD2, and TE2 are extended serial communication output signals. V _ sense1 is the voltage input ADC conversion signal, V _ sense2 is the reserve voltage input ADC conversion signal, and Vref reference source voltage is the ADC conversion signal.
In this embodiment, as shown in fig. 4, the voltage signal generated by the leakage current sensor is connected through the connector CN 1. The precision rectification circuit is composed of U2, R1, R2, R3, R4, R5, D1 and D2, and then the V _ sense1 channel is input to the MCU through R6, C6 filtering and Z1 clamping.
In this embodiment, as shown in fig. 5, U11, C38, C39, and C37 constitute a reference source generating circuit.
In this embodiment, as shown in fig. 6, U1 is a CAN isolation transceiver, L1, C4, C8, C7, ZD2, TV1, TV2, TV3, F1, F2, and ZD1 form a CAN bus filter circuit, and R7 is a termination resistor.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. An on-line detection method for the insulation performance of a battery system is characterized in that: the method comprises the following steps:
S 1 : firstly, isolating the battery system from the ground in a physical separation mode;
S 2 : connecting the battery system with a grounding wire of the electric equipment through the grounding wire;
S 3 : and then the insulation performance of the battery system is judged by detecting the leakage current on the grounding wire.
2. The method of claim 1, wherein the battery system comprises one or more of an outer case and a rack, each outer case or rack is connected with a ground wire, and each ground wire of the outer case or rack is connected with a current detection transmitter.
3. The battery system insulation performance online detection method according to claim 2, wherein the current detection transmitter comprises an MCU unit, an input end of the MCU unit is connected with the leakage sensor, an output end of the MCU unit is connected with a communication unit, the communication unit is connected with a monitoring end, the monitoring end comprises a server connected with the communication unit, the server is connected with a PC end or an intelligent terminal, and an output end of the server is respectively connected with an electric switch brake and an early warning device.
4. The on-line detection method for the insulation performance of the battery system as claimed in claim 3, wherein the leakage sensor is a CHDC-LTHA-20mA type sensor, and the MCU unit is an S9KEAZ128AMLH type MCU unit.
5. The battery system insulation performance online detection method according to claim 1, characterized in that in step S 1 Wherein the battery system is isolated from the ground by using an isolation pad.
6. The on-line detection method for the insulation performance of the battery system as claimed in claim 3, wherein the communication unit uses CAN bus or RS485 communication.
7. The method according to claim 3, wherein the server comprises one or more of a battery management system, a moving loop system and a fire fighting system.
8. The online detection method for the insulation performance of the battery system according to claim 3, wherein the intelligent terminal is a smart phone or a tablet computer, and the number of the intelligent terminals is multiple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211224357.9A CN115421039A (en) | 2022-10-08 | 2022-10-08 | Battery system insulation performance online detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211224357.9A CN115421039A (en) | 2022-10-08 | 2022-10-08 | Battery system insulation performance online detection method |
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| Publication Number | Publication Date |
|---|---|
| CN115421039A true CN115421039A (en) | 2022-12-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211224357.9A Pending CN115421039A (en) | 2022-10-08 | 2022-10-08 | Battery system insulation performance online detection method |
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| Country | Link |
|---|---|
| CN (1) | CN115421039A (en) |
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- 2022-10-08 CN CN202211224357.9A patent/CN115421039A/en active Pending
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