CN117110742A - Quality detection method and system for battery management unit - Google Patents
Quality detection method and system for battery management unit Download PDFInfo
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- CN117110742A CN117110742A CN202311056234.3A CN202311056234A CN117110742A CN 117110742 A CN117110742 A CN 117110742A CN 202311056234 A CN202311056234 A CN 202311056234A CN 117110742 A CN117110742 A CN 117110742A
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- management unit
- battery management
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- battery
- power supply
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- 238000001514 detection method Methods 0.000 title claims abstract description 52
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 28
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910001416 lithium ion Inorganic materials 0.000 claims abstract description 13
- 238000007689 inspection Methods 0.000 claims description 12
- 238000012795 verification Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 230000010354 integration Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000003381 stabilizer Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 239000013072 incoming material Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000036413 temperature sense Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- 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]
- G01R31/385—Arrangements for measuring battery or accumulator variables
-
- 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]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
Abstract
The invention discloses a quality detection method and a system of a battery management unit, comprising a device body, wherein the device body is internally provided with: the power supply module is connected with the battery management unit through a power supply interface on the device body to supply power to the battery management unit; the constant-value voltage stabilizing source module consists of a plurality of lithium ion battery simulators which are connected in series, and the voltage of each battery cell in the battery management unit is collected through a voltage collecting interface corresponding to the number of the lithium ion battery simulators arranged on the device body; the constant-value temperature stabilizing resistor module consists of a plurality of independent chip resistors, and the temperature of each battery cell in the battery management unit is collected through a temperature collection interface corresponding to the number of the chip resistors arranged on the device body. The battery management unit quality detection system has the advantages of functional integration, simplicity in operation, low cost and strong adaptability.
Description
Technical Field
The present invention relates to a quality detection system, and more particularly, to a quality detection method and system for a battery management unit.
Background
New energy is gradually replacing traditional energy as a green energy, and more countries and regions are paid attention to. The storage battery industry is a ring of new energy industry and also vigorously develops on the air port. The intelligent watch is small, and the intelligent watch is large, namely the energy storage battery box is formed by arranging and combining a plurality of battery units in series and parallel according to the amount of power required by electronic equipment. However, all battery packs need to be monitored, detected and controlled by a Battery Management System (BMS). The BMS main functions are to collect, process and store important information in the battery operation process in real time, exchange information with external equipment and give an alarm and protect in real time in the battery operation process. The BMU (battery management unit) is an important component of the BMS (battery management system), and has the main functions of accurately collecting each single battery and temperature and realizing the real-time monitoring of the battery state, so that strict screening conditions are required to be adopted in warehouse-in verification to reach the qualification standard, and a battery cell quality detection system is generated.
At present, the existing battery management system adopts a scheme of split detection, and is used for detecting and verifying single battery cell voltage, single temperature and power supply units respectively and independently, so that the operation complexity of detection is increased, the cost of detection is increased by a plurality of detection devices, the detection difficulty is increased, and the technical requirements of quality inspection staff are improved.
For example, there are two schemes for detecting the cell voltage: 1. the real battery is adopted, the output information can only depend on the data acquired by the BMU, so that a reliable comparison parameter can not be obtained, only the voltage data can be verified, and the accuracy of the acquired data can not be verified; 2. the programmable battery simulator is used for simulating voltage output, the acquisition and the precision of the battery cells of the BMU are verified through the condition voltage value, but the programmable battery simulator has the problems that the programmable battery simulator is used as a non-BMS manufacturer, and the programmable battery simulator has high cost and high precision.
For another example, there are two schemes for detecting the monomer temperature: 1. the water drop temperature sense can collect the ambient temperature, can judge whether the temperature data can be collected, and cannot compare the accuracy of the temperature data; 2. the sliding varistors are high in cost and complex in operation, and the resistance value is enabled to meet the range of the non-passing temperature by changing the resistance value.
In general, a quality detection system of a battery management unit which is specially designed for company quality inspection and has the advantages of complete functions, low cost, strong adaptability and simple operation is also lacking.
Disclosure of Invention
In order to solve the defects of the technology, the invention provides a quality detection method and a quality detection system of a battery management unit.
In order to solve the technical problems, the technical scheme adopted by the invention is that the quality detection system of the battery management unit comprises a device body, wherein the device body is internally provided with:
the power supply module is connected with the battery management unit through a power supply interface on the device body to supply power to the battery management unit;
the constant-value voltage stabilizing source module consists of a plurality of lithium ion battery simulators which are connected in series, and the voltage of each battery cell in the battery management unit is collected through a voltage collecting interface corresponding to the number of the lithium ion battery simulators arranged on the device body;
the constant-value temperature stabilizing resistor module consists of a plurality of independent chip resistors, and the temperature of each battery cell in the battery management unit is collected through a temperature collection interface corresponding to the number of the chip resistors arranged on the device body.
Further, the power supply module converts 220V ac power into 24V dc power and transmits the power to the battery management unit via the power supply interface connection.
Further, the power supply module converts 220V ac power into 12V dc power and transmits the power to the battery management unit via the power supply interface connection.
Further, the constant voltage source module consists of 60 lithium ion battery simulators which are connected in series, and each lithium ion battery simulator forms a voltage acquisition interface on the device body.
Further, the output voltage of the voltage acquisition interface is 3.3V.
Further, the input ends of the power supply module and the constant value voltage stabilizing source module are connected with 220V alternating current.
Further, the resistance value of the chip resistor is 10K or 100K, and each chip resistor is led out of two paths of pins to form a temperature acquisition interface connected with the battery management unit.
Further, the number of chip resistors is set to be 60 pieces arranged alone with a resistance value of 10K, 60 pieces arranged alone with a resistance value of 100K, or a combination of both.
The quality detection method of the battery management unit quality detection system is that a power supply module, a fixed value voltage stabilizing source module and a fixed value temperature stabilizing resistance module are arranged in a device body to form integrated verification of centralized power supply, multi-interface voltage acquisition and multi-interface temperature acquisition of a connected battery management unit.
Further, for the integrated verification of centralized power supply, multi-interface voltage acquisition and multi-interface temperature acquisition of the connected battery management unit, a connector of the battery management unit is connected with a quality detection system of the battery management unit, a power supply module supplies 24V/12V direct current voltage to the battery management unit, a constant value voltage stabilizing source module detects and outputs 3.3V voltage to a single battery cell of the battery management unit, a detection voltage value is displayed on an upper computer of the battery management unit, an upper computer display value is compared with the constant value 3.3V output by the system to obtain a voltage detection error of the battery management unit, the accuracy of the battery voltage acquired by the battery management unit is judged, a constant value 10K or 100K chip resistor is provided for temperature acquisition of the battery management unit through a constant value temperature stabilizing resistor module, two detection lines are led out from two sides of the chip resistor, after the temperature detection line of the battery management unit is connected with the detection line led out by the system, a 10K or 100K chip resistor is detected, and the temperature corresponding to the chip resistor is queried by an RT resistance table in software of the battery management unit, and the temperature corresponding to the chip resistor is displayed on the upper computer of the BMU.
The invention discloses a quality detection method and a quality detection system of a battery management unit, which are mainly used for verifying the integration of a power supply system, voltage acquisition and temperature acquisition of the battery management unit, are specially designed for company quality inspection, and have the advantages of functional integration, simplicity in operation, low cost and strong adaptability;
the function integration is to integrate a battery simulation system, a temperature simulation system and a power supply system into a system, and replace the traditional technology to respectively carry out inspection operation by connecting a connector with battery management unit equipment, thereby reducing the workload of inspectors;
the operation is simple, and the quality inspector can check the working state, the collected data and the precision of the battery management unit only by using 220V room electricity, inserting the connector and the battery management unit and connecting the battery management system with the slave control upper computer;
the cost is low, the programmable and adjustable functional requirements are set aside, fixed voltage and temperature data are used, and the verification of main functional points is realized by comparing the upper computer data with a fixed value;
the adaptability is strong, the limitation of the types of the battery management units is eliminated, and the battery management units of different types are adapted through the connector patch cord.
Drawings
FIG. 1 is a schematic diagram of the composition of the present invention.
Fig. 2 is a circuit diagram of the power supply module converting 220V ac power to 24V dc power.
Fig. 3 is a circuit diagram of the power supply module converting 220V ac power into 12V dc power.
Fig. 4 is a circuit diagram of a constant voltage source module.
Fig. 5 is a schematic diagram of the installation of the individual chip resistor.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description.
The quality detection system of the electric core management unit shown in fig. 1 comprises a device body, wherein the device body is internally provided with: the power supply module is connected with the battery management unit through a power supply interface on the device body to supply power to the battery management unit; the power supply module converts 220V alternating current into 24V direct current or 12V direct current and transmits the 24V direct current or 12V direct current to the battery management unit through the power supply interface connection. As shown in fig. 2, the circuit for converting 220V ac into 24V dc by the power supply module is formed by connecting 220Vrms ac to the input terminal V1, reducing the voltage by the transformer T1, rectifying by the rectifier bridge formed by the D1-D4 rectifier diodes, filtering by the C1 and C2 filter capacitors at the input and output terminals, and stabilizing the output voltage by 24V through the three-terminal integrated voltage stabilizer of U1 (model LM7824 CT). The selected LM7824CT has high linearity, can keep the linearity of output voltage at 0.02%/V, and provides over-temperature protection and current limiting functions. As shown in FIG. 3, the power supply module converts 220V AC into 12V DC, the input end V1 is connected with 220Vrms AC, the voltage is reduced by a transformer TRANS, then the voltage is rectified by a BRIDGE formed by D1-D4 rectifier diodes, filtering is carried out on C1, C2, C3 and C4 filter capacitors at the input end and the output end respectively, finally, voltage stabilization output voltage 24V is carried out by a three-terminal integrated voltage stabilizer of U1 (model LM7812 CT), the input end of LM7812CT receives an input voltage with a wider range, and the output end outputs a stable 12V voltage. The two circuits are adopted because the two circuits are the common 220V to 12V and 24V modes, and the technology is mature and reliable.
The constant-value voltage stabilizing source module consists of 60 lithium ion battery simulators which are connected in series, and the voltage of each battery cell in the battery management unit is collected through a voltage collecting interface corresponding to the number of the lithium ion battery simulators arranged on the device body; each lithium ion battery simulator forms a voltage acquisition interface on the device body, and the output voltage of the voltage acquisition interface is 3.3V. As shown in fig. 4, the circuit of the constant voltage source module is that the alternating current with the input end connected with 220Vrms is reduced in voltage by a transformer Trans, the Bridge rectifier Bridge formed by the rectifier diode is rectified, and the alternating current is connected with the voltage stabilizing regulating circuit (model is time division SK 1117-3.3) of the voltage stabilizer, and the maximum input voltage is 18V; the output voltage was 3.3V.
The constant-value temperature stabilizing resistor module, as shown in fig. 5, consists of a plurality of independent chip resistors, and acquires the temperature of each battery cell in the battery management unit by arranging temperature acquisition interfaces corresponding to the number of the chip resistors on the device body. For the common NTC thermistor, two types of 100K and 10K are selected in the embodiment, and a customized patch resistor mode is adopted. 60 pieces are respectively arranged, each resistor is provided with two paths of pins led out from a PCB, and the resistor is connected with a single temperature sensing acquisition line of a battery management unit during operation (the resistance model of 10K is a thick film resistor of C0603FR-0710KL of national giant YAGEO, the resistance value is 10kΩ, the precision is +/-1%, the power is 100mW, and the temperature coefficient is +/-100 ppm/DEG C); (100K resistor is selected from RC0603FR-07100KL thick film resistor, the resistance is 100kΩ, the precision is + -1%, the power is 100mW, and the temperature coefficient is + -100 ppm/. Degree.C.).
When the battery management unit is in operation, after the connector of the battery management unit is connected with the battery management unit quality detection system in a normal operating state, the detection system provides 24V/12V DC voltage for the battery management unit; after the battery management unit acquires normal working voltage, starting normal working; the detection system provides a fixed value 10K or 100K chip resistor for temperature acquisition of a battery management unit through a fixed value temperature stabilizing resistor module, two detection lines are led out from two sides of the chip resistor, after the temperature detection line of the battery management unit is connected with the detection line led out by the system, the 10K or 100K chip resistor can be detected, an RT resistance value table in the software of the battery management unit inquires the temperature (such as 25 ℃) corresponding to the resistor, and a BMU upper computer displays 25 ℃; the battery management unit voltage acquisition module is also connected with the physical hardware of the system through a connector; the system reduces the input 220Vac voltage to 12-18V through a transformer, converts the voltage into stable direct current voltage through full-bridge rectification and filtering treatment, and stabilizes the direct current voltage to 3.3V output through a voltage stabilizing and regulating circuit. The voltage stabilizing regulating circuit comprises an integrated circuit and a linear voltage stabilizer, after a single cell of the battery management unit detects that the system outputs 3.3V voltage, a detection voltage value is displayed on an upper computer of the battery management unit, and the display value of the upper computer is compared with the fixed value 3.3V output by the system to obtain a voltage detection error of the battery management unit, so that the accuracy of acquiring the cell voltage by the battery management unit can be judged.
In fig. 1, J1 is a power supply PIN connector (12 PIN) of a power supply module, J2 and J3 are fixed value voltage module PINs (32 PIN x 2) of a fixed value voltage stabilizing source module, J4 and J5 are PINs (10 k:60PIN x 2) of a fixed value temperature stabilizing resistor module, and J6 and J7 are fixed value temperature stabilizing resistor module PINs (100 k:60PIN x 2), so that the connection relation of the circuit is that a customized patch cord is accurately connected with a connector of a quality detection system of an electric core management unit, the quality detection system of the electric core management unit is connected with a power supply socket in a workshop by utilizing a three-hole national standard power cord, the battery management unit is connected with an industrial computer, a slave control upper computer of the battery management unit is opened, and collected data is compared with fixed data of the quality detection system of the electric core management unit. The battery management unit quality detection system forms an integration of the power supply module, the constant value voltage stabilizing module and the constant value temperature stabilizing module, can detect incoming materials according to specific application scenes of incoming material detection and warehouse entry detection, is beneficial to improving the working efficiency of quality inspection and quality personnel, breaks away from the traditional thinking of the traditional adjustable voltage module and the temperature module, and adopts a customized mode to verify the main functions of the battery management unit. Compared with an adjustable voltage simulator and a programmable resistor card, the intelligent power supply system has the advantages of being more advantageous in price, simple and clear in function, and capable of accurately verifying the acquisition accuracy and precision of the state, voltage and temperature of a power supply system of a battery management unit.
The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, but is also intended to be limited to the following claims.
Claims (10)
1. The utility model provides a battery management unit quality detection system, includes the device body, its characterized in that is provided with in the device body:
the power supply module is connected with the battery management unit through a power supply interface on the device body to supply power to the battery management unit;
the constant-value voltage stabilizing source module consists of a plurality of lithium ion battery simulators which are connected in series, and the voltage of each battery cell in the battery management unit is collected through a voltage collecting interface corresponding to the number of the lithium ion battery simulators arranged on the device body;
the constant-value temperature stabilizing resistor module consists of a plurality of independent chip resistors, and the temperature of each battery cell in the battery management unit is collected through a temperature collection interface corresponding to the number of the chip resistors arranged on the device body.
2. The electrical core management unit quality inspection system of claim 1, wherein: the power supply module converts 220V alternating current into 24V direct current and transmits the 24V direct current to the battery management unit through the power supply interface connection.
3. The electrical core management unit quality inspection system of claim 1, wherein: the power supply module converts 220V alternating current into 12V direct current and is connected to the battery management unit through a power supply interface.
4. The electrical core management unit quality inspection system of claim 1, wherein: the constant voltage source module consists of 60 lithium ion battery simulators which are connected in series, and each lithium ion battery simulator forms a voltage acquisition interface on the device body.
5. The electrical core management unit quality inspection system of claim 4, wherein: the output voltage of the voltage acquisition interface is 3.3V.
6. The electrical core management unit quality inspection system of claim 1, wherein: and the input ends of the power supply module and the fixed value voltage stabilizing source module are connected with 220V alternating current.
7. The electrical core management unit quality inspection system of claim 1, wherein: the resistance value of the chip resistor is 10K or 100K, and each chip resistor is led out of two paths of pins to form a temperature acquisition interface connected with the battery management unit.
8. The electrical core management unit quality inspection system of claim 7, wherein: the number of the chip resistors is set to be 60 pieces which are singly arranged and have a resistance value of 10K, 60 pieces which are singly arranged and have a resistance value of 100K or a combination of the two.
9. A quality detection method of a battery management unit quality detection system according to any one of claims 1-6, characterized by: the quality detection method is that a power supply module, a fixed value voltage stabilizing source module and a fixed value temperature stabilizing resistor module are arranged in a device body to form integrated verification of centralized power supply, multi-interface voltage acquisition and multi-interface temperature acquisition of a connected battery management unit.
10. The method for detecting the quality of the electrical core management unit quality detection system according to claim 9, wherein: the integrated verification of centralized power supply, multi-interface voltage acquisition and multi-interface temperature acquisition of the connected battery management unit is that a connector of the battery management unit is connected with a quality detection system of the battery management unit, a power supply module supplies 24V/12V direct current voltage to the battery management unit, a constant value voltage stabilizing source module detects and outputs 3.3V voltage to a single battery cell of the battery management unit, a detection voltage value is displayed on an upper computer of the battery management unit, an upper computer display value is compared with the constant value 3.3V output by the system to obtain a battery management unit voltage detection error, the accuracy of the battery management unit acquisition of the battery cell voltage is judged, a constant value 10K or 100K chip resistor is provided for temperature acquisition of the battery management unit through a constant value temperature stabilizing resistor module, two detection lines are led out from two sides of the chip resistor, after the temperature detection line of the battery management unit is connected with the detection line led out by the system, a 10K or 100K chip resistor is detected, and an RT resistance value table in the software of the battery management unit inquires about the temperature corresponding to the resistor and displays the temperature in the upper computer of the BMU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311056234.3A CN117110742A (en) | 2023-08-22 | 2023-08-22 | Quality detection method and system for battery management unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311056234.3A CN117110742A (en) | 2023-08-22 | 2023-08-22 | Quality detection method and system for battery management unit |
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| CN117110742A true CN117110742A (en) | 2023-11-24 |
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| CN202311056234.3A Pending CN117110742A (en) | 2023-08-22 | 2023-08-22 | Quality detection method and system for battery management unit |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201716194U (en) * | 2010-06-30 | 2011-01-19 | 埃泰克汽车电子(芜湖)有限公司 | Testing device of electric automobile battery management system |
| KR101101947B1 (en) * | 2010-09-12 | 2012-01-02 | 주식회사 브이앤아이 | Battery simulator for battery management system |
| CN103941210A (en) * | 2014-05-11 | 2014-07-23 | 湖北德普电气股份有限公司 | BMS (battery management system) testing monitoring system and method |
| CN108548968A (en) * | 2018-03-06 | 2018-09-18 | 湖南小步科技有限公司 | The performance testing device and test method of battery management system |
| CN211293113U (en) * | 2019-11-29 | 2020-08-18 | 苏州精控能源科技有限公司 | Test tool of battery management system |
| CN112578206A (en) * | 2020-12-03 | 2021-03-30 | 平高集团储能科技有限公司 | Performance testing device for battery management system |
| CN213181942U (en) * | 2020-05-26 | 2021-05-11 | 深圳天邦达科技有限公司 | Be applicable to BMS simulation front end and gather chip functional test frock |
-
2023
- 2023-08-22 CN CN202311056234.3A patent/CN117110742A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201716194U (en) * | 2010-06-30 | 2011-01-19 | 埃泰克汽车电子(芜湖)有限公司 | Testing device of electric automobile battery management system |
| KR101101947B1 (en) * | 2010-09-12 | 2012-01-02 | 주식회사 브이앤아이 | Battery simulator for battery management system |
| CN103941210A (en) * | 2014-05-11 | 2014-07-23 | 湖北德普电气股份有限公司 | BMS (battery management system) testing monitoring system and method |
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