CN211335591U - Special vehicle lithium battery electrical control system - Google Patents
Special vehicle lithium battery electrical control system Download PDFInfo
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- CN211335591U CN211335591U CN201921649187.2U CN201921649187U CN211335591U CN 211335591 U CN211335591 U CN 211335591U CN 201921649187 U CN201921649187 U CN 201921649187U CN 211335591 U CN211335591 U CN 211335591U
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- lithium battery
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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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Abstract
The utility model discloses a special type car lithium cell electrical control system, including lithium cell module (7), BMS management system (5), heating element (6), direct current contactor (3), shunt (2), fuse (1), pre-charge resistance (10), DC/DC (4), shunt release (9), direct current breaker (8); the lithium battery module (7) converts voltage through the DC/DC (4), and the shunt release (9) disconnects the direct current breaker (8) on the DC/DC (4) line after monitoring that the total voltage or the single voltage is lower than a control threshold value through the BMS management system (5), so that the DC/DC (4) is in an open-circuit mode and stops working. The utility model discloses a DC/DC (4) and direct current breaker (8) that contain shunt release (9) are supporting to be used, can replace lead acid battery's usage, reach and reduce manufacturing cost, embody vehicle compactness, lightweight advantage.
Description
Technical Field
The utility model relates to a new energy vehicle lithium battery system electrical control technical field, concretely relates to special type car lithium cell electrical control system.
Background
The existing new energy vehicle is popular with governments and consumers as an environment-friendly vehicle type. However, in a conventional new energy vehicle lithium battery electrical control system, a 12V or 24V lead-acid battery is generally used as a power supply of a BMS management system. The lead-acid storage battery not only increases the manufacturing cost of the lithium battery system, but also occupies the space of the vehicle, and has certain influence on the design compactness and the light weight of the vehicle.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a special type car lithium cell electrical control system, including lithium cell module, BMS management system, heating element, direct current contactor, shunt, fuse, pre-charge resistance, its characterized in that: the lithium battery electrical control system of the special vehicle further comprises a DC/DC, a shunt release and a direct current breaker; the direct current contactor and the fuse are connected in series on the positive circuit of the lithium battery module, and the shunt is connected in series on the negative circuit; the pre-charging resistor is connected in parallel with the direct current contactor; the heating unit is connected in parallel with the positive and negative electrode circuits of the lithium battery module; the BMS monitors the lithium battery module and each direct current contactor by acquiring a wiring harness through each monomer and a direct current contactor coil which are connected to the battery; and the lithium battery module converts the voltage through the DC/DC, and the shunt release disconnects the direct current breaker on the DC/DC line after monitoring that the total voltage or the single voltage is lower than a control threshold value through the BMS management system, so that the DC/DC is in an open-circuit mode and stops working.
Furthermore, the lithium battery in the lithium battery module comprises a lithium iron phosphate battery and a ternary lithium battery.
Further, the BMS management system comprises a master control module and a slave control module.
Furthermore, the BMS management system controls the working strategy modes of the heating unit, the direct current contactor and the shunt release through data acquisition of the master control module and the slave control module, and monitors various parameter values of the lithium battery module in real time.
Specifically, the lithium battery module is a 74-string lithium iron phosphate battery module.
Further, the heating unit is composed of a plurality of PI heating films which are connected in series.
Furthermore, the PI heating film is adhered to the surface of the battery core.
The utility model discloses beneficial effect as follows:
1) by using the lithium battery electrical control system of the special vehicle, a lead-acid storage battery can be omitted as a power supply of the BMS management system, so that the cost of the electrical control system is reduced;
2) use the utility model discloses special type car lithium cell electrical control system can embody the design compactness of vehicle, lightweight advantage.
Drawings
FIG. 1 is a perspective view of a lithium battery electrical control system product of a special vehicle according to an embodiment of the present invention
Wherein: 1 is a fuse, 2 is a shunt, 3 is a direct current contactor, 4 is DC/DC, 5 is a BMS management system, 6 is a heating unit, 7 is a lithium battery module, 8 is a direct current breaker, 9 is a shunt release, and 10 is a pre-charging resistor;
fig. 2 is an electrical schematic diagram of a lithium battery electrical control system product of a special vehicle according to a specific embodiment of the present invention.
Detailed Description
In order to understand the features and technical contents of the present invention in more detail, the following description is given in conjunction with the accompanying drawings, which are only used for reference and not for limiting the present invention.
As shown in fig. 1, one embodiment: special type car lithium cell electrical control system, including lithium battery module 7, BMS management system 5, heating element 6, DC contactor 3, shunt 2, fuse 1, pre-charge resistance 10, its characterized in that: the lithium battery electrical control system of the special vehicle further comprises a DC/DC 4, a shunt release 9 and a direct current breaker 8; the positive circuit of the lithium battery module 7 is connected with the direct current contactor 3 and the fuse 1 in series, and the negative circuit is connected with the shunt 2 in series; the pre-charging resistor 10 is connected in parallel with the direct current contactor 3; the heating unit 6 is connected in parallel with the positive and negative circuits of the lithium battery module 7; the BMS management system 5 monitors the lithium battery module 7 and each direct current contactor 3 by collecting wire harnesses through each single body connected to the battery and the direct current contactor 3 coil; the lithium battery module 7 converts voltage through the DC/DC 4, and the shunt release 9 disconnects the DC breaker 8 on the DC/DC 4 line after monitoring that the total voltage or the cell voltage is lower than the control threshold through the BMS management system 5, so that the DC/DC 4 stops working in an open circuit mode.
Here, the lithium battery in the lithium battery module 7 includes a lithium iron phosphate battery and a ternary lithium battery.
Here, the BMS management system 5 includes a master control module and a slave control module.
Specifically, the BMS management system 5 controls the working strategy modes of the heating unit 6, the direct current contactor 3 and the shunt release 9 through data acquisition of the master control module and the slave control module, and monitors various parameter values of the lithium battery module 7 in real time.
More specifically, the lithium battery module 7 is a 74-string lithium iron phosphate battery module.
Here, the dc contactor 3 may be controlled by the BMS management system 5 to switch various operation modes of the lithium iron battery pack.
Here, the heating unit 6 is composed of a plurality of PI heating films connected in series.
Specifically, the PI heating film is adhered to the surface of the cell.
More specifically, the PI heating film can rapidly heat the battery, so that the battery pack can be used in severe cold regions.
The utility model discloses a specific embodiment still provides a mode, uses foretell special type car lithium cell electrical control system, mode is as follows:
step A, electrifying: the direct current breaker 8 is opened, the battery auxiliary loop outputs the DC/DC 4 and the driver auxiliary electricity of the whole vehicle, after the self-checking of the whole vehicle is finished without errors, an enabling signal is sent to the battery, the battery judges that the battery state is in a dischargeable state according to the received enabling signal, the main direct current contactor 3 is closed to output the main loop electricity, and meanwhile, the battery state information is reported in real time;
step B, charging: a charger is connected, the charger and the battery are detected to be in a chargeable state, the charging direct current contactor 3 is closed, and the charger charges the battery;
step C, heating: if the battery temperature is lower than the control threshold value, detecting whether a charger is connected, if so, closing the charging heating direct current contactor 3, and heating the battery to a dischargeable state by the charger; if the charger is not connected, the battery heating direct current contactor 3 is closed, and the electric quantity of the battery is used for heating the battery to a dischargeable state;
d, discharging a main circuit: in the state that the charger is connected, the main loop is strictly forbidden to discharge; and under the state that the charger is connected, detecting that the battery is in a dischargeable state, and closing the main positive direct current contactor 3 to output a main loop circuit when receiving an enabling signal. When the battery is in a non-dischargeable state, no matter whether an enable signal exists or not, the main circuit of the battery does not output;
step E, the protection function of the battery: when the BMS management system 5 monitors that the voltage, temperature and current parameter values of the battery reach control threshold values, the BMS management system 5 controls the direct current contactor 3 to be closed, and the electric quantity output of the battery is stopped;
step F, under-voltage protection of the battery: when the BMS management system 5 monitors that the total battery pressure or the single voltage is lower than a control threshold value, the direct current contactor 3 is controlled to be closed, the shunt release 9 is controlled to work to close the direct current breaker 8, and the line of the DC/DC 4 is disconnected to be in an open circuit mode to stop working.
The utility model discloses with the combination of DC/DC 4 and direct current breaker 8 and lithium battery module 7 that contain shunt release 9, replace lead acid battery technical scheme, its material cost only accounts for about 35% ~ 40% of lead acid battery. Meanwhile, lead-acid batteries have a lower energy density than lithium batteries, and require a larger volume and a heavier weight to achieve the same energy density. Therefore, the compactness and the light weight of the vehicle are greatly improved after the lead-acid storage battery is cancelled to replace the lithium battery.
As fig. 2, the utility model discloses an electric schematic diagram mode of operation: closing an air switch 1 (if the air switch 2 is disconnected, the air switch 2 needs to be closed together), performing power-on self-inspection on a BMS, attracting an auxiliary pre-charging relay, attracting an auxiliary loop relay, waiting for a 24V enabling signal of the whole vehicle, attracting a main loop pre-charging relay and attracting a main loop relay; when the power is on, the battery thermal management logic is executed; the air switch 1 is a manual switch, the air switch 2 is normally closed, and the BMS sends a shunt release signal to cut off the shunt release only when the user forgets to manually close the air switch 1 after using the battery to protect the battery from over-discharge.
The above matters related to the common general knowledge are not described in detail and can be understood by those skilled in the art.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. The utility model provides a special type car lithium cell electrical control system, includes lithium cell module (7), BMS management system (5), heating element (6), direct current contactor (3), shunt (2), fuse (1), pre-charge resistance (10), its characterized in that: the lithium battery electrical control system of the special vehicle further comprises a DC/DC (4), a shunt release (9) and a direct current breaker (8); the positive circuit of the lithium battery module (7) is connected with the direct current contactor (3) and the fuse (1) in series, and the negative circuit is connected with the shunt (2) in series; the pre-charging resistor (10) is connected in parallel with the direct current contactor (3); the heating unit (6) is connected in parallel with the positive and negative circuits of the lithium battery module (7); the BMS management system (5) monitors the lithium battery module (7) and each direct current contactor (3) by collecting wire harnesses through each single body and the direct current contactor (3) coil connected to the battery; the lithium battery module (7) converts voltage through the DC/DC (4), and the shunt release (9) disconnects the direct current breaker (8) on the DC/DC (4) line after monitoring that the total voltage or the single voltage is lower than a control threshold value through the BMS management system (5), so that the DC/DC (4) is in an open-circuit mode and stops working.
2. The special vehicle lithium battery electrical control system according to claim 1, characterized in that: the lithium battery in the lithium battery module (7) comprises a lithium iron phosphate battery and a ternary lithium battery.
3. The special vehicle lithium battery electrical control system according to claim 1, characterized in that: the BMS management system (5) comprises a master control module and a slave control module.
4. The special vehicle lithium battery electrical control system according to claim 3, characterized in that: the BMS management system (5) controls the working strategy modes of the heating unit (6), the direct current contactor (3) and the shunt release (9) through data acquisition of the master control module and the slave control module, and monitors various parameter values of the lithium battery module (7) in real time.
5. The special vehicle lithium battery electrical control system according to claim 4, wherein: the lithium battery module (7) is a 74-string lithium iron phosphate battery module.
6. The special vehicle lithium battery electrical control system according to claim 1, characterized in that: the heating unit (6) is formed by connecting a plurality of PI heating films in series.
7. The special vehicle lithium battery electrical control system according to claim 6, wherein: and the PI heating film is adhered to the surface of the battery cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921649187.2U CN211335591U (en) | 2019-09-30 | 2019-09-30 | Special vehicle lithium battery electrical control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921649187.2U CN211335591U (en) | 2019-09-30 | 2019-09-30 | Special vehicle lithium battery electrical control system |
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| CN211335591U true CN211335591U (en) | 2020-08-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111169287A (en) * | 2019-09-30 | 2020-05-19 | 双登集团股份有限公司 | Special vehicle lithium battery electrical control system and working mode thereof |
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2019
- 2019-09-30 CN CN201921649187.2U patent/CN211335591U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111169287A (en) * | 2019-09-30 | 2020-05-19 | 双登集团股份有限公司 | Special vehicle lithium battery electrical control system and working mode thereof |
| CN111169287B (en) * | 2019-09-30 | 2024-07-16 | 双登集团股份有限公司 | Special vehicle lithium battery electric control system and working mode thereof |
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