CN210090570U - Battery management system frock detecting system - Google Patents
Battery management system frock detecting system Download PDFInfo
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- CN210090570U CN210090570U CN201920283327.2U CN201920283327U CN210090570U CN 210090570 U CN210090570 U CN 210090570U CN 201920283327 U CN201920283327 U CN 201920283327U CN 210090570 U CN210090570 U CN 210090570U
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- management system
- battery management
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- bms
- battery
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Abstract
The utility model belongs to the technical field of BMS battery management system, concretely relates to battery management system frock detecting system. The tooling detection system of the battery management system comprises a monomer voltage acquisition unit, a temperature acquisition unit, a monomer passive balance detection unit, a voltage switching unit and a battery pack, wherein the monomer voltage acquisition unit, the temperature acquisition unit, the monomer passive balance detection unit, the voltage switching unit and the battery pack are mutually independent; the single voltage acquisition unit is connected with a single battery of the battery pack, and the BMS battery management system is connected with the battery pack; the single voltage acquisition unit, the temperature acquisition unit, the single passive balance detection unit and the voltage switching unit are respectively connected with the tool detection device. The beneficial effects are as follows: the main functions and performance detection of single voltage acquisition, temperature acquisition, passive balance detection and wide-range power supply are integrated on one device, so that the device is efficient and realizes automatic detection.
Description
Technical Field
The utility model belongs to the technical field of BMS battery management system, concretely relates to battery management system frock detecting system.
Background
The function and performance of a Battery Management System (BMS) are detected in a simple, effective and rapid mode, and the urgent requirements of BMS research and development and production are met.
Firstly, the voltage acquisition of the original single battery mostly adopts the method that the acquired voltage values of each path of the BMS are directly read through software and then are compared with the voltage values of the actually measured battery ends, and in order to ensure the data accuracy when BMS products are detected in batches, the method needs to detect the voltage values of the single battery ends for many times, and has low efficiency and more manual intervention.
Secondly, the original multi-path temperature acquisition detects the actual temperature through a temperature sensor and compares the actual temperature with the temperature value read in software, and the method has two defects, on one hand, the detected temperature value can change along with the change of the environmental temperature, the error is large, and manual intervention is needed; on the other hand, the accuracy of temperature acquisition under two extreme conditions cannot be judged.
Finally, the balancing mode is divided into active balancing and passive balancing, wherein the passive balancing is performed by cutting the length and not compensating the length, the battery energy with high electric quantity can be changed into heat energy to be dissipated, so that excessive heating cannot be generated, the balancing current is generally about 100mA, but the 100mA current is difficult to change through software monitoring, only an instruction for turning on and off the balancing function can be given in a balancing strategy, the change of the balancing on state cannot be really known, the balancing on state cannot be displayed in the original mode by connecting an LED lamp in series in the balancing circuit, and the balancing current value of the current balancing circuit cannot be really known in the method.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a remedy prior art's defect, provide a battery management system frock detecting system.
The utility model discloses a realize through following technical scheme:
a tooling detection system of a battery management system comprises a monomer voltage acquisition unit, a temperature acquisition unit, a monomer passive balance detection unit, a voltage switching unit and a battery pack, wherein the monomer voltage acquisition unit, the temperature acquisition unit, the monomer passive balance detection unit, the voltage switching unit and the battery pack are mutually independent; the single voltage acquisition unit is connected with a single battery of the battery pack, and the BMS battery management system is connected with the battery pack; the temperature acquisition unit is connected with the BMS battery management system through a wire harness; the single passive balance detection unit is connected with the BMS battery management system through a wire harness; the voltage switching unit is connected with the BMS battery management system through a wire harness, and the single voltage acquisition unit, the temperature acquisition unit, the single passive balance detection unit and the voltage switching unit are respectively connected with the tool detection device.
Further, the temperature acquisition unit include fixed resistance, control switch, BMS battery management system's MCU microcontrol unit opens temperature acquisition function circuit simultaneously or respectively through control switch, BMS battery management system gathers fixed resistance temperature value through control switch through gathering the chip, BMS battery management system reads a plurality of temperature values of settlement to carry out the comparison with the standard value of settlement and judge whether the temperature acquisition performance accords with the design requirement.
Further, the tool detection device is connected with one or more voltage drop devices in each acquisition line in series and used for generating obvious voltage drop before and after the equalization circuit is opened and closed and calculating the current value of the equalization loop.
Further, the battery pack is not limited to lithium batteries, ternary batteries and lead-acid batteries, and the number of the single battery strings of the battery pack is not limited to specific numbers.
Further, the control switch is not limited to a relay, an MOS (metal oxide semiconductor) tube and a triode.
Further, the voltage drop device is not limited to resistors and magnetic beads.
Further, the tool detection device has a multi-power design or indirectly refers to a plurality of power supplies to supply power to the BMS through the tool detection device, and the supply voltage comprises the highest supply voltage which can be borne by the BMS, the working voltage which is generated by the BMS and the lowest supply voltage required by the BMS.
The utility model has the advantages that: the main functions and performance detection of single voltage acquisition, temperature acquisition, passive balance detection and wide-range power supply are integrated on one device, so that the device is efficient and realizes automatic detection.
Drawings
The present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic block diagram of a tooling detection system of the battery management system of the present invention;
FIG. 2 is a schematic block diagram of the temperature acquisition unit of the present invention;
fig. 3 is a schematic block diagram of the passive equalization detecting unit of the present invention.
In the figure, 1BMS battery management system, 2 frock detection device, 3 monomer voltage acquisition units, 4 passive balanced detecting element, 5 temperature acquisition units, 6 voltage switching unit, 7 balanced resistance, 8 divider resistance, 9 group battery, 10 control switch, 11 acquisition chip, 12 MCU little control unit, 13 fixed resistance.
Detailed Description
Fig. 1-3 show an embodiment of the present invention. The utility model relates to a battery management system tool detection system, which comprises a single voltage acquisition unit 3, a temperature acquisition unit 5, a single passive balance detection unit 4, a voltage switching unit 6 and a battery pack 9, wherein the units are mutually independent; the single voltage acquisition unit 3 is connected with the single battery of the battery pack 9, and meanwhile, the BMS battery management system 1 is connected with the battery pack 9; the temperature acquisition unit 5 is connected with the BMS battery management system 1 through a wire harness; the single passive balance detection unit 4 is connected with the BMS battery management system 1 through a wire harness; the voltage switching unit 6 is connected with the BMS battery management system 1 through a wire harness, and the single voltage acquisition unit 3, the temperature acquisition unit 5, the single passive balance detection unit 4 and the voltage switching unit 6 are respectively connected with the tool detection device 2.
Further, temperature acquisition unit 5 include fixed resistance 13, control switch 10, temperature acquisition function circuit is opened simultaneously or respectively through control switch 10 to the MCU microcontrol unit 12 of BMS battery management system 1, BMS battery management system 1 gathers fixed resistance 13 temperature value through gathering chip 11 through control switch 10, BMS battery management system 1 reads a plurality of temperature values of settlement to carry out the comparison with the standard value of settlement and judge whether the temperature acquisition performance accords with the design requirement.
Further, the tool detection device 2 is connected with one or more voltage drop devices in each acquisition line in series and used for generating obvious voltage drop before and after the equalization circuit is opened and closed and calculating the current value of the equalization loop.
Further, the battery pack 9 is not limited to a lithium battery, a ternary battery, and a lead-acid battery, and the number of the battery cell strings of the battery pack 9 is not limited to a specific number.
Further, the control switch 10 is not limited to a relay, a MOS transistor, and a transistor.
Further, the voltage drop device is not limited to resistors and magnetic beads.
Further, the tool detection device 2 has a multi-power design or indirectly refers to a plurality of power supplies to supply power to the BMS battery management system 1 through the tool detection device 2, and the power supply voltage includes the highest power supply voltage that the BMS battery management system 1 can bear, the operating voltage that the BMS battery management system 1 is producing, and the lowest power supply voltage that the BMS battery management system 1 is producing the operating requirement.
The utility model discloses a battery management system frock detecting system, wherein, the monomer voltage acquisition example:
taking 5 strings of battery packs 9 as an example, 5 groups of cell voltage values acquired by the tool detection device 2 are 3.641V, 3.648V, 3.652V, 3.660V and 3.655V respectively, the actually measured cell voltage values of the battery packs 9 are 3.640V, 3.648V, 3.652V, 3.660V and 3.656V, the voltage deviation values acquired by 5 paths are 1mV, 0mV and 1mV respectively, the voltage values of the tool detection device 2 are corrected into actual cell voltage values 3.640V, 3.648V, 3.652V, 3.660V and 3.656V, the 5 values are used as standard values of the tool detection device 2, and the standard values are used for comparing whether the acquired voltage values meet design standards or not;
example temperature collection:
taking 2-path temperature acquisition as an example, selecting 25 degrees (10K resistance) as a temperature detection point, electrifying a single-pole double-throw relay coil by the MCU through GPIO, closing a normally open contact of the relay, connecting a resistance with a fixed resistance value into the 2-path temperature acquisition circuit, comparing the acquired temperature value with a real value of 25 degrees, and taking the comparison value as the judgment of the accuracy of BMS temperature acquisition;
passive equalization current detection example:
taking a ternary battery as an example, as shown in a circuit connection mode shown in fig. 3, a voltage dividing resistor 8 and an equalizing resistor 7 are connected in series in a circuit, the resistance of the whole loop is assumed to be 100 ohms (R1 + R2+ R3), the single-cell collection voltage value before starting equalization is 3.6V, the single-cell collection voltage value after starting equalization is 3.4V, an obvious voltage drop is generated before and after the equalizing circuit, and the equalizing current I =3.4/100=34 mA. The balance current value of the passive balance circuit is normally less than 100mA, and the design balance function is normal.
The utility model relates to a battery management system frock detecting system, frock detection device 2 is connected with group battery 9, directly carry out monomer voltage acquisition, carry out the correction of frock detection device 2 collection value through the voltage value of actually measuring group battery 9 terminal, and regard the calibration value as the standard value, judge whether the voltage value that BMS actually gathered reaches the design standard with the standard value, the testing process time can change to some extent because of group battery 9 monomer battery cluster number, on average accomplish automatic detection in 1-2 seconds, and upload the testing result to the host computer, through switching over a plurality of relays in proper order, make BMS can read multiple temperature values (such as minimum temperature, highest temperature, zero degree, normal temperature, etc.), wherein each temperature value passes through the resistance of fixed resistance, through the special algorithm calculation transform into the temperature value, this process need not manual intervention, as a part in the frock automatic detection, the designed circuit is shown in fig. 2, a resistor with a certain resistance value is additionally connected in series in the equalization loop, and is specially used for voltage division during testing of passive equalization current, so that obvious voltage drop is generated before and after the equalization function is started, the designed circuit is shown in fig. 3, and the current value during equalization starting can be obtained through the following calculation formula: equalizing current = voltage value after starting equalization/total resistance of equalizing loop.
The present invention is not limited to the above embodiments, and any person should learn to make under the teaching of the present invention and the present invention has the same or similar technical solution, and all fall into the protection scope of the present invention.
The technology, shape and construction parts which are not described in detail in the present invention are all known technology.
Claims (7)
1. A tooling detection system of a battery management system comprises a monomer voltage acquisition unit, a temperature acquisition unit, a monomer passive balance detection unit, a voltage switching unit and a battery pack, wherein the monomer voltage acquisition unit, the temperature acquisition unit, the monomer passive balance detection unit, the voltage switching unit and the battery pack are mutually independent; the battery pack management system is characterized in that the single voltage acquisition unit is connected with a single battery of the battery pack, and meanwhile, the BMS battery management system is connected with the battery pack; the temperature acquisition unit is connected with the BMS battery management system through a wire harness; the single passive balance detection unit is connected with the BMS battery management system through a wire harness; the voltage switching unit is connected with the BMS battery management system through a wire harness, and the single voltage acquisition unit, the temperature acquisition unit, the single passive balance detection unit and the voltage switching unit are respectively connected with the tool detection device.
2. The battery management system tool detection system of claim 1, wherein: the temperature acquisition unit include fixed resistance, control switch, BMS battery management system's MCU microcontrol unit opens temperature acquisition function circuit simultaneously or respectively through control switch, BMS battery management system gathers fixed resistance temperature value through gathering the chip through control switch, BMS battery management system reads a plurality of temperature values of settlement to the value of will reading compares with the standard value of settlement and judges whether temperature acquisition performance accords with the design requirement.
3. The battery management system tool detection system of claim 1, wherein: the tool detection device is connected with one or more voltage drop devices in each acquisition line in series and used for generating obvious voltage drop before and after the equalization circuit is opened and closed and calculating the current value of the equalization loop.
4. The battery management system tool detection system of claim 1, wherein: the battery pack is one of a lithium battery, a ternary battery and a lead-acid battery.
5. The battery management system tool detection system of claim 2, wherein: the control switch is one of a relay, an MOS tube and a triode.
6. The battery management system tool detection system of claim 3, wherein: the voltage drop device is one of a resistor and a magnetic bead.
7. The battery management system tool detection system of claim 1, wherein: the tool detection device has a multi-power design or indirectly refers to a plurality of power supplies to supply power to the BMS through the tool detection device, and the supply voltage comprises the highest supply voltage which can be borne by the BMS, the working voltage which is just produced by the BMS and the lowest supply voltage which is just produced by the BMS.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920283327.2U CN210090570U (en) | 2019-03-06 | 2019-03-06 | Battery management system frock detecting system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920283327.2U CN210090570U (en) | 2019-03-06 | 2019-03-06 | Battery management system frock detecting system |
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| CN210090570U true CN210090570U (en) | 2020-02-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113759300A (en) * | 2021-11-10 | 2021-12-07 | 深圳市聚能优电科技有限公司 | Performance test method and device of battery management unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113759300A (en) * | 2021-11-10 | 2021-12-07 | 深圳市聚能优电科技有限公司 | Performance test method and device of battery management unit |
| CN113759300B (en) * | 2021-11-10 | 2022-02-15 | 深圳市聚能优电科技有限公司 | Performance test method and device of battery management unit |
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