CN211375008U - Series cascade circuit for fault detection of high-voltage battery management system - Google Patents
Series cascade circuit for fault detection of high-voltage battery management system Download PDFInfo
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- CN211375008U CN211375008U CN201921643542.5U CN201921643542U CN211375008U CN 211375008 U CN211375008 U CN 211375008U CN 201921643542 U CN201921643542 U CN 201921643542U CN 211375008 U CN211375008 U CN 211375008U
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- 238000001514 detection method Methods 0.000 title claims abstract description 31
- 238000002955 isolation Methods 0.000 claims abstract description 36
- 239000003990 capacitor Substances 0.000 claims description 52
- 230000005540 biological transmission Effects 0.000 description 7
- 238000012545 processing Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The utility model discloses a series connection cascade circuit for high-voltage battery management system fault detection, including a plurality of levels of cascade circuit units, the cascade circuit unit includes integrated circuit board (1), battery acquisition unit (2), fault signal input detection circuit (3), high section acquisition unit connector input interface (4), high-voltage isolation electric capacity (5), high-voltage isolation opto-coupler (6), low-voltage acquisition unit connector output interface (7) and fault signal output control circuit (8), battery acquisition unit connects series battery group (9), and the battery acquisition unit is connected in series through high-voltage isolation electric capacity; the cascade circuit unit of the previous stage is connected with the output interface of the low-voltage acquisition unit connector of the cascade circuit unit of the next stage through the input interface of the high-section acquisition unit connector. The utility model discloses can acquire the battery collection unit who breaks down through series connection and cascaded form to judge battery system's fault point, save pencil, reduce cost.
Description
Technical Field
The utility model relates to a new forms of energy battery detection device especially relates to a series cascade circuit for high voltage battery management system fault detection.
Background
With the development of new energy vehicles, the number of the series-connected batteries of the new energy vehicles is up to 48, even up to 96, and the total pressure can reach more than 400V. When the acquisition unit of a group of batteries breaks down, the whole vehicle needs to find problems and report abnormal information in the first time, and then effective and reasonable measures are taken to reduce the risk to the minimum. The battery detection device in the prior art respectively collects and detects each group of series-connected battery packs and outputs signals to the corresponding control equipment, so that the connected wire harnesses are more, the wiring is difficult, the occupied space is larger, the cost is higher, and the maintenance is inconvenient.
Disclosure of Invention
An object of the utility model is to provide a series connection cascade circuit for high voltage battery management system fault detection can acquire the battery collection unit that breaks down through series connection and cascaded form to judge battery system's fault point, save pencil, reduce cost.
The utility model discloses a realize like this:
a cascade circuit in series connection for fault detection of a high-voltage battery management system comprises a plurality of stages of cascade circuit units, wherein each stage of cascade circuit unit comprises an integrated circuit board, and a battery acquisition unit, a fault signal input detection circuit, a high-section acquisition unit connector input interface, a high-voltage isolation capacitor, a high-voltage isolation optocoupler, a low-voltage acquisition unit connector output interface and a fault signal output control circuit which are integrated on the integrated circuit board; the high-voltage battery management system comprises a plurality of groups of series battery packs formed by sequentially connecting a plurality of batteries in series, the battery acquisition units are connected with the series battery packs in a one-to-one correspondence manner, and two adjacent battery acquisition units are connected in series through high-voltage isolation capacitors; the input interface of the connector of the high-section acquisition unit is connected to the battery acquisition unit of the highest section through a fault signal input detection circuit, and the output interface of the connector of the low-voltage acquisition unit is connected to the battery acquisition unit of the first section through a high-voltage isolation optocoupler and a fault signal output control circuit; the cascade circuit unit of the previous stage is connected with the output interface of the low-voltage acquisition unit connector of the cascade circuit unit of the next stage through the input interface of the high-section acquisition unit connector of the cascade circuit unit to form a series cascade circuit; the output interface of the low-voltage acquisition unit connector is externally connected with a low-voltage main control unit.
The high-voltage isolation capacitor is formed by connecting two capacitors in series, one end of the high-voltage isolation capacitor is connected with the output end of the battery acquisition unit of the previous section, and the other end of the high-voltage isolation capacitor is connected with the input end of the battery acquisition unit of the next section.
The fault signal input detection circuit comprises a first resistor, a second resistor, an impedance and a first capacitor, wherein the first resistor and the second resistor are connected in series between the power supply end of the highest-section battery acquisition unit and the input interface of the connector of the high-section acquisition unit; the impedance is connected in parallel with the first capacitor, one of the parallel nodes is connected with the series node of the first resistor and the second resistor, and the other parallel node is grounded.
The fault signal output control circuit comprises a third resistor, a fourth resistor and an eighth capacitor, the fourth resistor and the eighth capacitor are connected in parallel and then connected in series between one end of the third resistor and the input end of the high-voltage isolation optocoupler, and the other end of the third resistor is connected with the output end of the first battery acquisition unit.
Each level cascade circuit unit include be no less than 3 battery acquisition units.
Each stage of cascade circuit unit comprises 3-5 battery acquisition units.
Compared with the prior art, the utility model, following beneficial effect has:
1. the utility model discloses adopt two series connection's electric capacity to constitute the transmission that high pressure isolation electric capacity is used for the inboard signal between two adjacent battery acquisition units, need not unnecessary protection circuit measure, save the pencil, reduce the processing and the assembly cost of pencil, it is lower to compare the traditional inboard transmission mode cost that adopts high pressure to keep apart the chip, has guaranteed that the high efficiency of inboard transmission is reliable.
2. The utility model discloses adopt the form of a high pressure isolation opto-coupler to connect the transmission that is used for the board outer signal between PCB board and PCB board, guaranteed the reliability of the board outer remote transmission, the cost is reduced again simultaneously.
The utility model discloses a cascade of series connection of inboard battery acquisition unit and the off-board cascade circuit unit carries out the transmission detection of signal, need not to be connected every battery acquisition unit with low pressure main control unit respectively, compares prior art's wiring mode and has saved the peripheral pencil more than 80%, both the cost is reduced, has reduced wiring occupation space again, has optimized the design rationality of system, has ensured signal transmission's high efficiency simultaneously, can adapt to the off-board complicated application environment.
Drawings
Fig. 1 is a schematic diagram of a series cascade circuit for fault detection in a high voltage battery management system.
In the figure, 1 an integrated circuit board (PCB), 2 a battery collecting unit, 3 a fault signal input detection circuit, 4 a high-voltage collecting unit connector input interface, 5 a high-voltage isolating capacitor, 6 a high-voltage isolating optocoupler (B1), 7 a low-voltage collecting unit connector output interface, 8 a fault signal output control circuit, 9 a series battery pack, an R1 first resistor, an R2 second resistor, an R3 third resistor, an R4 fourth resistor, a Z1 impedance, a C1 first capacitor, a C2 second capacitor, a C3 third capacitor, a C4 fourth capacitor, a C5 fifth capacitor, a C6 sixth capacitor, a C7 seventh capacitor and a C8 eighth capacitor.
Detailed Description
The invention will be further explained with reference to the drawings and the specific embodiments.
Referring to fig. 1, a serial cascade circuit for detecting faults of a high voltage battery management system includes a plurality of stages of cascade circuit units, each stage of cascade circuit unit includes an integrated circuit board (PCB) 1 and a plurality of battery collecting units 2 integrated on the integrated circuit board 1, a fault signal input detecting circuit 3, a high-section collecting unit connector input interface 4, a plurality of high-voltage isolation capacitors 5, a high-voltage isolation optocoupler (B1) 6, a low-voltage collecting unit connector output interface 7 and a fault signal output control circuit 8; the high-voltage battery management system comprises a plurality of groups of series battery packs 9 formed by sequentially connecting a plurality of batteries in series, the battery acquisition units 2 are connected with the series battery packs 9 in a one-to-one correspondence manner and used for acquiring battery signals of the series battery packs 9, and two adjacent battery acquisition units 2 are connected in series through high-voltage isolation capacitors 5; the high-section acquisition unit connector input interface 4 is connected to the input end of the highest-section battery acquisition unit 2 through a fault signal input detection circuit 3, and the low-voltage acquisition unit connector output interface 7 is connected to the output end of the first-section battery acquisition unit 2 through a high-voltage isolation optocoupler 6 and a fault signal output control circuit 8; the cascade circuit unit of the previous stage is connected with the output interface 7 of the low-voltage acquisition unit connector of the cascade circuit unit of the next stage through the input interface 4 of the high-section acquisition unit connector of the cascade circuit unit to form a series cascade circuit; the output interface 7 of the low-voltage acquisition unit connector is externally connected with a low-voltage main control unit.
High voltage isolation capacitor 5 constitute by two electric capacity series connection, high voltage isolation capacitor 5's one end is connected with the output of the battery acquisition unit 2 of last festival, high voltage isolation capacitor 5's the other end is connected with the input of the battery acquisition unit 2 of next festival, carry out signal transmission through high voltage isolation capacitor 5 that two electric capacity of establishing ties constitute between the battery acquisition unit 2 of inboard, reduce cost.
The fault signal input detection circuit 3 comprises a first resistor R1, a second resistor R2, an impedance Z1 and a first capacitor C1, wherein the first resistor R1 and the second resistor R2 are connected in series between the power supply end of the highest-section battery acquisition unit 2 and the input interface 4 of the high-section acquisition unit connector; the impedance Z1 is connected in parallel with the first capacitor C1, and one of the parallel nodes is connected with the series node of the first resistor R1 and the second resistor R2, and the other parallel node is grounded. The first resistor R1 and the second resistor R2 play a role in current limiting, the impedance Z1 plays a role in voltage stabilizing, and the first capacitor C1 is a filter capacitor.
The fault signal output control circuit 8 comprises a third resistor R3, a fourth resistor R4 and an eighth capacitor C8, the fourth resistor R4 and the eighth capacitor C8 are connected in parallel and then connected in series between one end of the third resistor R3 and the input end of the high-voltage isolation optocoupler 6, and the other end of the third resistor R3 is connected with the output end of the first battery collection unit 2. The third resistor R3 plays a role in current limiting, and the fourth resistor R4 and the eighth capacitor C8 are used for protecting a light emitting diode in the high-voltage isolation optocoupler 6.
Each cascade circuit unit comprises not less than 3 battery acquisition units 2, preferably, each cascade circuit unit comprises 3-5 battery acquisition units 2 and can correspondingly acquire the battery signals of 3-5 groups of series battery packs 9.
Example (b):
the high-voltage battery of the new energy automobile is formed by connecting 48 batteries in series, a single-stage cascade circuit unit is adopted, every 12 batteries are connected in series to form a group of series battery packs 9, four groups of series battery packs 9 are formed in total, four battery acquisition units 2 are integrated on an integrated circuit board 1 and are connected with the four groups of series battery packs 9 in a one-to-one correspondence mode, and the integrated circuit board is used for acquiring battery signals of the four groups of series battery packs 9. The input end GPIO _ IN1 of the battery acquisition unit 2 of the first section is connected with the output end GPIO _ OUT2 of the battery acquisition unit 2 of the second section through a high-voltage isolation capacitor 5 formed by connecting a seventh capacitor C7 and a sixth capacitor C6 IN series, the input end GPIO _ IN2 of the battery acquisition unit 2 of the second section is connected with the output end GPIO _ OUT3 of the battery acquisition unit 2 of the third section through a high-voltage isolation capacitor 5 formed by connecting a fifth capacitor C5 and a fourth capacitor C4 IN series, and the input end GPIO _ IN3 of the battery acquisition unit 2 of the third section is connected with the output end GPIO _ OUT4 of the battery acquisition unit 2 of the fourth section through a high-voltage isolation capacitor 5 formed by connecting a third capacitor C3 and a second capacitor C2 IN series. The input end GPIO _ IN4 of the battery acquisition unit 2 of the fourth section is connected with the input interface 4 of the high-section acquisition unit connector through the fault signal input detection circuit 3, and the output end GPIO _ OUT1 of the battery acquisition unit 2 of the first section is connected with the output interface 7 of the low-voltage acquisition unit connector through the fault signal output control circuit 8 and the high-voltage isolation optocoupler 6.
The battery signals collected by the four battery collecting units 2 are transmitted from the fourth section to the first section through the high-voltage isolating capacitor 5, and finally transmitted to the low-voltage main control unit through the low-voltage collecting unit connector output interface 7 for signal judgment, if the low-voltage main control unit only receives a part of low-voltage feedback signals, because the four battery collecting units 2 are connected in series, the battery collecting unit 2 at a fault node can not transmit information to the battery collecting unit 2 at the next section, which battery collecting unit 2 has a fault can be diagnosed according to the received low-voltage feedback signals, the position of a fault node can be judged once, and after the fault node is repaired, the fault detection of the high node can be continued.
If the number of the batteries is large, a plurality of stages of cascade circuit units can be sequentially connected in series through the output interface 7 of the low-voltage acquisition unit connector and the input interface 4 of the high-section acquisition unit connector to form a series cascade circuit. The fault signal input detection circuit 3 receives a detection signal of the previous stage through the input interface 4 of the high-section acquisition unit connector, the detection signal is input to the GPIO _ IN4 for judgment after the processing is finished, and the transmission method of the signal IN the board is the same as that of the single-stage cascade circuit unit. The battery acquisition unit 2 controls the fault signal output control circuit 8 to transmit signals through the high-voltage isolation optocoupler 6, and transmits the signals to the high-section acquisition unit connector input interface 4 of the next-stage cascade circuit unit through the low-voltage acquisition unit connector output interface 7, so that the effective cascade of information is realized. And finally, the data is transmitted to a low-voltage main control unit for judgment through a low-voltage acquisition unit connector output interface 7 of the first-stage cascade circuit unit.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, therefore, any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (6)
1. A series cascade circuit for fault detection of a high-voltage battery management system is characterized in that: the device comprises a plurality of stages of cascade circuit units, wherein each stage of cascade circuit unit comprises an integrated circuit board (1), a battery acquisition unit (2) integrated on the integrated circuit board (1), a fault signal input detection circuit (3), a high-section acquisition unit connector input interface (4), a high-voltage isolation capacitor (5), a high-voltage isolation optocoupler (6), a low-voltage acquisition unit connector output interface (7) and a fault signal output control circuit (8); the high-voltage battery management system comprises a plurality of groups of series battery packs (9) formed by sequentially connecting a plurality of batteries in series, the battery acquisition units (2) are connected with the series battery packs (9) in a one-to-one correspondence manner, and two adjacent battery acquisition units (2) are connected in series through high-voltage isolation capacitors (5); the high-section acquisition unit connector input interface (4) is connected to the highest-section battery acquisition unit (2) through a fault signal input detection circuit (3), and the low-voltage acquisition unit connector output interface (7) is connected to the first-section battery acquisition unit (2) through a high-voltage isolation optocoupler (6) and a fault signal output control circuit (8); the cascade circuit unit of the previous stage is connected with the output interface (7) of the low-voltage acquisition unit connector of the cascade circuit unit of the next stage through the input interface (4) of the high-section acquisition unit connector of the cascade circuit unit to form a series cascade circuit; the output interface (7) of the low-voltage acquisition unit connector is externally connected with a low-voltage main control unit.
2. The series cascade circuit for fault detection in a high voltage battery management system of claim 1, wherein: the high-voltage isolation capacitor (5) is formed by connecting two capacitors in series, one end of the high-voltage isolation capacitor (5) is connected with the output end of the battery acquisition unit (2) of the previous section, and the other end of the high-voltage isolation capacitor (5) is connected with the input end of the battery acquisition unit (2) of the next section.
3. The series cascade circuit for fault detection in a high voltage battery management system of claim 1, wherein: the fault signal input detection circuit (3) comprises a first resistor R1, a second resistor R2, an impedance Z1 and a first capacitor C1, wherein a first resistor R1 and a second resistor R2 are connected in series between the power supply end of the highest-node battery acquisition unit (2) and the input interface (4) of the high-node acquisition unit connector; the impedance Z1 is connected in parallel with the first capacitor C1, and one of the parallel nodes is connected with the series node of the first resistor R1 and the second resistor R2, and the other parallel node is grounded.
4. The series cascade circuit for fault detection in a high voltage battery management system of claim 1, wherein: the fault signal output control circuit (8) comprises a third resistor R3, a fourth resistor R4 and an eighth capacitor C8, the fourth resistor R4 and the eighth capacitor C8 are connected in parallel and then connected in series between one end of the third resistor R3 and the input end of the high-voltage isolation optocoupler (6), and the other end of the third resistor R3 is connected with the output end of the first battery acquisition unit (2).
5. The series cascade circuit for fault detection in a high voltage battery management system of claim 1, wherein: each level cascade circuit unit include be no less than 3 battery acquisition units (2).
6. The series cascade circuit for fault detection of a high voltage battery management system of claim 5, wherein: each stage of cascade circuit unit comprises 3-5 battery acquisition units (2).
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| CN201921643542.5U CN211375008U (en) | 2019-09-29 | 2019-09-29 | Series cascade circuit for fault detection of high-voltage battery management system |
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| CN201921643542.5U CN211375008U (en) | 2019-09-29 | 2019-09-29 | Series cascade circuit for fault detection of high-voltage battery management system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117054904A (en) * | 2023-10-11 | 2023-11-14 | 深圳市万联新能科技有限公司 | Inspection device and system for fuel cell |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117054904A (en) * | 2023-10-11 | 2023-11-14 | 深圳市万联新能科技有限公司 | Inspection device and system for fuel cell |
| CN117054904B (en) * | 2023-10-11 | 2024-01-12 | 深圳市万联新能科技有限公司 | Inspection device and system for fuel cell |
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Address after: Room 1001, 10 / F, office building, Shihu Jinling Plaza, 88 Nanxijiang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province, 215128 Patentee after: DuPu (Suzhou) New Energy Technology Co.,Ltd. Patentee after: JIANGSU DUPU NEW ENERGY TECHNOLOGY Co.,Ltd. Address before: 201804 room 108, floor 1, building 1, No. 6988, Jiasong North Road, Anting Town, Jiading District, Shanghai J67 Patentee before: SHANGHAI DUPU NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: JIANGSU DUPU NEW ENERGY TECHNOLOGY Co.,Ltd. |
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Denomination of utility model: Series cascade circuit for fault detection of high voltage battery management system Effective date of registration: 20220114 Granted publication date: 20200828 Pledgee: Industrial and Commercial Bank of China Limited Suzhou Wuzhong sub branch Pledgor: DuPu (Suzhou) New Energy Technology Co.,Ltd. Registration number: Y2022320010022 |
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Date of cancellation: 20230202 Granted publication date: 20200828 Pledgee: Industrial and Commercial Bank of China Limited Suzhou Wuzhong sub branch Pledgor: DuPu (Suzhou) New Energy Technology Co.,Ltd. Registration number: Y2022320010022 |
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Effective date of registration: 20231204 Address after: Room 1001, 10 / F, office building, Shihu Jinling Plaza, 88 Nanxijiang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province, 215128 Patentee after: DuPu (Suzhou) New Energy Technology Co.,Ltd. Patentee after: VOLKSWAGEN AG Address before: Room 1001, 10 / F, office building, Shihu Jinling Plaza, 88 Nanxijiang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province, 215128 Patentee before: DuPu (Suzhou) New Energy Technology Co.,Ltd. Patentee before: JIANGSU DUPU NEW ENERGY TECHNOLOGY Co.,Ltd. |