CN218958603U - Explosion-proof starting circuit of lithium battery pack - Google Patents
Explosion-proof starting circuit of lithium battery pack Download PDFInfo
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- CN218958603U CN218958603U CN202320579127.8U CN202320579127U CN218958603U CN 218958603 U CN218958603 U CN 218958603U CN 202320579127 U CN202320579127 U CN 202320579127U CN 218958603 U CN218958603 U CN 218958603U
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 107
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 107
- 238000007599 discharging Methods 0.000 claims abstract description 61
- 238000004891 communication Methods 0.000 claims abstract description 31
- 230000003993 interaction Effects 0.000 claims abstract description 19
- 238000004880 explosion Methods 0.000 abstract description 6
- 230000002265 prevention Effects 0.000 abstract description 2
- 230000003137 locomotive effect Effects 0.000 description 19
- 230000002159 abnormal effect Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 238000005065 mining Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 206010010144 Completed suicide Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- -1 gangue Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- Battery Mounting, Suspending (AREA)
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Abstract
The utility model belongs to the technical field of power explosion prevention, and particularly relates to an explosion-proof starting circuit of a lithium battery pack, wherein a battery management system is electrically connected with the lithium battery pack, and a man-machine interaction unit is connected with the battery management system through a CAN communication lead; the power supply main negative port is connected with the negative electrode of the lithium battery pack through a lead; the communication output unit is connected with the battery management system through a CAN communication wire; one end of the discharging unit is connected with a starting system in the vehicle, and the other end of the discharging unit is connected with the overcurrent protection unit; one end of the charging unit is used for being connected with a positive port of an external charger, and the other end of the charging unit is connected with the discharging unit in parallel at one end of the overcurrent protection unit; one end of the starting system is arranged on the battery management system, and the other end of the starting system is arranged on a lead where a main negative terminal of the power supply is located. The utility model can enable the lithium battery pack to start the power supply to safely charge and discharge, further avoid the explosion of the lithium battery pack and prolong the service life of the lithium battery pack.
Description
Technical Field
The utility model belongs to the technical field of explosion prevention of power supplies, and particularly relates to an explosion-proof starting circuit of a lithium battery pack.
Background
The mining electric locomotive is mainly used for long-distance transportation of a main transportation roadway under a mine and the ground, and the mining electric locomotive pulls a train consisting of a mine car or a human car to walk on a track so as to finish transportation of coal, gangue, materials, equipment and personnel. The mining electric locomotive is divided into a direct current overhead wire type electric locomotive and a storage battery type electric locomotive according to electric energy sources. Compared with a direct current overhead wire type electric locomotive, the storage battery type electric locomotive is powered by a storage battery carried on the locomotive, the transportation line is not limited, the section of a required roadway is smaller, the problem that the overhead wire type electric locomotive generates sparks between a pantograph and an overhead wire in operation is avoided, and the electric locomotive is more suitable for mine environments with long lines, large electromagnetic interference and poor power grid stability. However, most of the starting power supplies of the battery type electric locomotive are lead-acid batteries, and the lead-acid batteries have low energy density, large volume, short service life, large maintenance engineering amount and high application cost.
Along with the maturity and application popularization of new energy technology, the lithium battery with the advantages of large storage capacity, more times of charging and discharging, small volume, light weight, recoverability, small pollution, low maintenance cost and the like is widely applied to the storage battery type electric locomotive and even the whole mine auxiliary transportation system.
Because of the limitation of explosion-proof standard, the voltage provided by a single lithium battery is limited, and in order to ensure the cruising ability of the electric locomotive in the use process and to ensure enough current to start the electric locomotive during starting, a plurality of lithium batteries are generally connected in series to form a lithium battery pack to be used as a starting power supply of the electric locomotive. The lithium battery pack performs heavy-current discharge when the voltage is low, namely heavy-current overdischarge; or when the lithium battery pack is charged, the charging current is overlarge, and the lithium battery pack is subjected to irreversible damage by too long-time charging, so that the lithium battery pack is accelerated to attenuate, the rated power is reduced, the cycle life is shortened, and the heavy bulge is ignited to explode, so that catastrophic economic loss and casualties are brought to a mine.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art, and provides an explosion-proof starting circuit for a lithium battery pack, which can enable a starting power supply of the lithium battery pack to charge and discharge safely, further avoid explosion of the lithium battery pack and prolong the service life of the lithium battery pack.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the utility model provides an explosion-proof starting circuit of lithium cell group, includes lithium cell group, its characterized in that: the system also comprises a battery management system, a man-machine interaction unit, an overcurrent protection unit, a discharging unit, a charging unit, a starting system, a power supply total negative port and a communication output unit;
the battery management system comprises a battery management unit and a battery control unit, wherein the battery management unit is connected with the lithium battery pack through a wire, the battery management unit is connected with the battery control unit through a CAN communication wire, and the man-machine interaction unit is connected with the battery control unit through a CAN communication wire; the power supply main negative port is connected with the negative electrode of the lithium battery pack through a lead; the communication output unit is connected with the battery control unit through a CAN communication wire;
one end of the discharging unit is connected with a starting system in the vehicle, and the other end of the discharging unit is connected with the overcurrent protection unit; one end of the charging unit is used for being connected with a positive port of an external charger, and the other end of the charging unit is connected with the discharging unit in parallel at one end of the overcurrent protection unit;
one end of the starting system is arranged on the battery control unit, and the other end of the starting system is arranged on a lead where the power supply main negative terminal is located.
Preferably, the discharging unit comprises a discharging contactor and a discharging positive port which are sequentially connected in series, the discharging positive port is used for being connected with a positive port of a starting system in the vehicle, the discharging contactor is connected with one end of the overcurrent protection unit through a wire, and the battery control unit is in signal connection with the discharging contactor.
Preferably, the charging unit comprises a charging contactor and a charging positive port which are sequentially connected in series, the charging positive port is used for being connected with a positive port of an external charger, the charging contactor is connected with the discharging contactor in parallel at one end of the overcurrent protection unit through a wire, and the charging contactor is connected with the battery control unit through signals.
Preferably, the battery control unit is connected to a wire between the discharge contactor and the overcurrent protection unit;
the starting system comprises a self-locking relay and a double-trip knob switch, wherein the double-trip knob switch comprises a two-gear switch, namely a first knob switch and a second knob switch; one end of the self-locking relay is connected to a lead where the main negative terminal of the power supply is located, the other end of the self-locking relay is connected to the battery control unit through a lead, and the self-locking relay is in communication connection with the battery control unit; one end of the first knob switch is connected to the battery control unit through a wire, and the other end of the first knob switch is connected to the wire where the main negative terminal of the power supply is located; both ends of the second knob switch are connected with the battery control unit through wires; the first knob switch is different from the second knob switch in closing time period.
Preferably, the overcurrent protection unit comprises a current transformer and an overcurrent fuse, the charging contactor is connected with the discharging contactor in parallel at one end of the current transformer through a wire, the other end of the current transformer is connected with the overcurrent fuse, the other end of the overcurrent fuse is connected with the anode of the lithium battery pack through a wire, and the current transformer is connected with the battery control unit through a wire.
Preferably, the communication output unit comprises a high-speed CAN signal port and a low-speed CAN signal port, the high-speed CAN signal port and the low-speed CAN signal port are respectively connected with the battery control unit through a CAN communication wire, and the two CAN communication wires are stranded into one at a part close to the battery control unit.
The utility model has the beneficial effects that:
(1) The battery management system, the discharging unit, the charging unit and the starting system are mutually matched, so that the self-checking work before the vehicle is started is realized, the self-locking relay in the starting system can be closed only if the self-checking is qualified, the discharging contactor in the discharging unit can be closed only after the self-locking relay and the second knob switch are simultaneously closed, the lithium battery pack can be normally discharged, and the vehicle can be started; when the self-check is problematic, the self-locking relay is not closed, and even if a user manually closes the second knob switch, the vehicle cannot be started, so that the lithium battery pack is ensured not to discharge under the conditions of overdischarge or abnormal battery temperature.
(2) When the over-discharge of the lithium battery pack is detected in the self-checking process, the charging contactor is automatically closed, and when the charging positive port is connected with the positive port of an external charger, the lithium battery pack can be directly charged; when the battery control unit detects that the lithium battery pack is fully charged through the battery management unit, the charging contactor is automatically opened, and the lithium battery pack is prevented from being overcharged.
(3) When detecting that the charging current or the discharging current is abnormally increased through the current transformer in the overcurrent protection unit, the battery control unit of the utility model can disconnect the charging contactor or the discharging contactor, so as to avoid the long-time abnormal heavy current charging or discharging of the lithium battery pack; and the overcurrent protection unit is provided with an overcurrent fuse, so that the overcurrent protection unit can be used as a final protection means for breaking abnormal heavy current under the condition that the breaking action of a charging contactor or a discharging contactor fails, and the lithium battery pack can not charge and discharge the abnormal heavy current for a long time.
(4) The utility model prevents and automatically processes various conditions which can cause damage to the lithium battery pack in the charging and discharging process, so that the lithium battery pack can be safely charged and discharged as a starting power supply, the explosion probability of the lithium battery pack is greatly reduced, the service life of the lithium battery pack is prolonged, accidents caused by the mining electric locomotive using the lithium battery pack as the starting power supply are further avoided, the economic loss and the casualties of a mine are reduced, and the economic benefit and the safety coefficient of the mining electric locomotive are improved.
Drawings
FIG. 1 is a schematic diagram of a circuit structure of the present utility model;
the actual correspondence between each label and the component name of the utility model is as follows:
1. a lithium battery pack; 21. a battery management unit; 22. a battery control unit; 3. a man-machine interaction unit; 41. an overcurrent fuse; 42. a current transformer; j1, a self-locking relay; k1, a double-solution point knob switch; k1-1, a first knob switch; k1-2, a second knob switch; KM1, a discharge contactor; KM2, charging contactor; p1, discharging positive port; p2, charging positive port; p3, a high-speed CAN signal port; p4, a low-speed CAN signal port; p5, a power supply total negative port;
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The technical characteristics of the technical scheme of the utility model are equivalently replaced and the scheme obtained by conventional reasoning is within the protection scope of the utility model under the premise of not making creative work.
As shown in fig. 1, the explosion-proof starting circuit of the lithium battery pack of the utility model is formed by connecting a lithium battery pack 1, a battery management system, a man-machine interaction unit 3, an overcurrent protection unit, a discharging unit, a charging unit, a starting system, a communication output unit, a power supply total negative port P5 and a wire. The battery management system is connected with the lithium battery pack 1 and is used for collecting state information of the lithium battery pack 1; the man-machine interaction unit 3 is connected with the battery management system and is used for realizing information interaction between a user and the battery management system; the discharging unit is used for being connected with a starting system in the vehicle, and the lithium battery pack 1 supplies power to the vehicle through the discharging unit; the charging unit is used for being connected with an external charger to charge the lithium battery pack 1; the discharging unit and the charging unit are connected with the lithium battery pack 1 and the battery management system through the overcurrent protection unit, and when the charging current or the discharging current is overlarge, the battery management system and the overcurrent protection unit are matched with each other to take protection action on the discharging unit or the charging unit; the communication output unit is connected with the battery management system through a CAN communication wire and is used for transmitting information such as the state and operation data of a power supply in the battery management system to the vehicle system; the starting system is arranged between the battery management system and a lead where the power supply main negative port P5 is located and used for safely starting the vehicle.
The lithium battery pack 1 is formed by connecting a plurality of lithium batteries in series or in parallel. The connection method of lithium batteries and the number of lithium batteries contained in the lithium battery pack 1 are determined by actual power demand, and are not intended to limit the present utility model. The lithium battery pack 1 in this embodiment is constituted by lithium batteries connected in series, and the voltage is 24V.
The battery management system includes a battery management unit 21 and a battery control unit 22. The positive and negative electrodes of each lithium battery in the lithium battery pack 1 are connected with the battery management unit 21 through an acquisition lead, and each item of data of the lithium battery pack 1, including battery temperature, battery voltage and the like, is acquired by the battery management unit 21 through the acquisition lead; the battery management unit 21 reports to the battery control unit 22 through the CAN communication wire. The man-machine interaction unit 3 obtains and displays various parameter data in the battery control unit 22 through the CAN communication lead, so that a driver in the vehicle CAN know the state of the lithium battery pack 1 conveniently.
The discharging unit comprises a discharging positive port P1 and a discharging contactor KM1 which are sequentially connected in series, and the discharging positive port P1 is used for being connected with a positive port of a starting system in the vehicle; one end of the discharge contactor KM1 is connected to the discharge positive port P1. The charging unit comprises a charging positive port P2 and a charging contactor KM2 which are sequentially connected in series, wherein the charging positive port P2 is used for being connected with a positive port of an external charger; one end of the charging contactor KM2 is connected to the charging positive port P2. The other end of the discharging contactor KM1 and the other end of the charging contactor KM2 are connected in parallel to one end of the current transformer 42, i.e. the discharging unit is connected in parallel to one end of the charging unit. The battery control unit 22 is in signal connection with the discharging contactor KM1 and the charging contactor KM 2.
The overcurrent protection unit comprises an overcurrent fuse 41 and a current transformer 42, and the overcurrent fuse 41 and the current transformer 42 are sequentially connected in series with the anode of the lithium battery pack 1. The battery control unit 22 is connected to the wire between the current transformer 42 and the discharge contactor KM1 via a wire, and the current transformer 42 is also connected to the battery control unit 22 via a wire.
The power supply main negative terminal P5 is connected with the negative electrode of the lithium battery pack 1 through a lead. When the overcurrent fuse 41 is in the unblown state, the discharge contactor KM1 is closed, and the lithium battery pack 1 supplies a starting current to the vehicle interior starting system through the discharge unit and the total negative port P5; when the discharge contactor KM1 is opened, the lithium battery pack 1 stops supplying the starting current to the vehicle interior starting system. When the charging contactor KM2 is closed, an external charger supplies charging current to the lithium battery pack 1 through the charging unit and the power supply total negative port P5 to charge the lithium battery pack 1.
The starting system comprises a self-locking relay J1 and a double-trip knob switch K1. One end of the self-locking relay J1 is connected to a lead between the power supply main negative terminal P5 and the negative electrode of the lithium battery pack 1, one end of the self-locking relay J1 is connected with the battery control unit 22, and the battery control unit 22 is also connected with the self-locking relay J1 through signals. The double-trip-point knob switch K1 comprises two-gear switches, namely a first knob switch K1-1 and a second knob switch K1-2; one end of the first knob switch K1-1 is connected to a wire between the power supply main negative port P5 and the negative electrode of the lithium battery pack 1, and the other end of the first knob switch K is connected with the battery control unit 22; both ends of the second knob switch K1-2 are connected with the battery control unit 22; at most only one of the first rotary switch K1-1 and the second rotary switch K1-2 is in a closed state in the same period. The arrangement of the left and right positions of the first knob switch K1-1 and the second knob switch K1-2 should not be construed as limiting the present utility model, and the first knob switch K1-1 is arranged on the left side of the second knob switch K1-2 in this embodiment.
The communication output unit comprises a high-speed CAN signal port P3 and a low-speed CAN signal port P4, wherein the high-speed CAN signal port P3 and the low-speed CAN signal port P4 are respectively connected with the battery control unit 22 through a CAN communication wire, and the two CAN communication wires are twisted into a bus at a part close to the battery control unit 22. The high-speed CAN signal port P3 and the low-speed CAN signal port P4 are communication output unit ports of the whole lithium battery pack explosion-proof starting circuit, are connected with a vehicle system through signals, and provide state and operation data of the lithium battery pack for the vehicle system.
The following describes the implementation of the present utility model in detail:
when starting the vehicle, the user needs to reversely rotate the rotary double-solution-point rotary switch K1 to the gear where the first rotary switch K1-1 is located, namely, the first rotary switch K1-1 is closed, the battery control unit 22 is powered on, the battery control unit 22 and the battery management unit 21 are mutually matched, and self-checking work is started on the lithium battery pack 1. The self-checking content mainly comprises that whether the current temperature and the current voltage of the lithium battery pack 1 are in a safety range or not, if the current temperature and the current voltage are in the safety range, the battery control unit 22 controls the self-locking relay J1 to be actively closed, so that the lithium battery pack 1 is in a standby mode, and system parameters in the standby state are displayed on the man-machine interaction unit 3; if the self-checking result is not in the safety range, the self-locking relay J1 is not closed, the whole explosion-proof starting circuit of the lithium battery pack is in an abnormal mode, and system parameters in the abnormal mode are displayed on the man-machine interaction unit 3; when the abnormal state is that the current voltage of the lithium battery pack 1 is too low, the battery control unit 22 controls the charging contactor KM2 to be actively closed, if the charging positive port P2 is connected with the positive port of the external charger, the lithium battery pack 1 can be directly charged, the lithium battery pack 1 is prevented from being used in an overdischarge state, and the charging state parameters are displayed on the man-machine interaction unit 3; when the abnormal state is caused by that the current temperature of the lithium battery pack 1 is not appropriate, the man-machine interaction unit 3 can remind the user to overhaul the battery.
When the user obtains that the lithium battery pack 1 is in a standby state through the man-machine interaction unit 3, the double-solution-point rotary switch K1 is rotated reversely until the second rotary switch K1-2 is positioned, namely the first rotary switch K1-1 is opened, and the second rotary switch K1-2 is closed. When the self-locking relay J1 is closed and the second knob switch K1-2 is closed, the battery control unit 22 actively closes the discharging contactor KM1, the lithium battery pack 1 outputs starting current through the discharging positive port P1 and the power supply total negative port P5, starting transmission is achieved, and the vehicle is started.
When the user needs to stop and power off, the double-solution-point knob switch K1 rotates clockwise to cancel the closing state of the second knob switch K1-2, the battery control unit 22 overturns the state values of all components in the starting system, and the suicide power-off of the explosion-proof starting circuit of the lithium battery pack is completed, namely the double-solution-point knob switch K1 is not contacted with the first knob switch K1-1 or the second knob switch K1-2, and meanwhile the self-locking relay J1 is disconnected.
The current transformer 42 collects the current in the charging or discharging process in real time, and transmits the collected current to the battery control unit 22, and when the battery control unit 22 detects that the current in the charging or discharging process is too large, the charging contactor KM2 or the discharging contactor KM1 is controlled to be opened. When the discharge current or the charge current is too large and the battery control unit 22 does not control the discharge contactor KM1 or the charge contactor KM2 to be opened, the overcurrent fuse 41 is blown, so that the lithium battery pack 1 is not damaged due to the abnormal high-current charge and discharge for a long time.
When the battery control unit 22 obtains the signal of full charge of the lithium battery pack 1 through the battery management unit 21, the charging contactor KM2 is controlled to be opened, so as to avoid damage to the lithium battery pack 1 caused by overcharge.
When the battery control unit 22 detects that the lithium battery pack 1 is overdischarged during the running process of the vehicle, the man-machine interaction unit 3 warns and prompts the charging.
The control technologies of the battery management unit 21, the battery control unit 22 and the man-machine interaction unit 3 for other components in the present utility model are all the prior art, and are not described herein.
According to the explosion-proof starting circuit of the lithium battery pack, the self-checking of the lithium battery pack 1 is completed before the vehicle is started through the battery management system, the man-machine interaction unit 3, the overcurrent protection unit, the discharging unit, the charging unit, the starting system and the communication output unit which are matched with each other, the self-locking relay J1 and the double-trip knob switch K1 are closed at the same time to serve as necessary conditions for the vehicle starting, and the lithium battery pack 1 is effectively prevented from being used under the conditions of overdischarge or abnormal battery temperature. In the process of charging and discharging the lithium battery pack 1, the utility model can also disconnect the discharging contactor KM1 or the charging contactor KM2 according to whether the charging current or the discharging current is abnormally excessive, so as to prevent the lithium battery pack 1 from being damaged by the abnormally excessive charging current or discharging current, and the overcurrent fuse 41 is used as a final protection means under the condition that the opening action of the discharging contactor KM1 or the charging contactor KM2 fails, so that the lithium battery pack 1 can not be charged or discharged under the state of abnormally large current for a long time. The battery control unit 22 of the present utility model can also disconnect the charging contactor KM2 when the lithium battery pack 1 is overcharged, and early warn the user of the overdischarged lithium battery pack state through the man-machine interaction unit 3 during the use of the vehicle. The explosion-proof starting circuit of the lithium battery pack prevents and processes various conditions which can cause damage to the lithium battery pack 1, so that the lithium battery pack can be safely charged and discharged as a starting power supply, the explosion probability of the lithium battery pack is greatly reduced, the service life of the lithium battery pack is prolonged, the situation that the mine electric locomotive using the lithium battery pack as the starting power supply causes disastrous casualties and economic losses to a mine due to the occurrence of accidents is further avoided, and the economic benefit and the safety coefficient of the mine electric locomotive are improved.
The technology, shape, and construction parts of the present utility model, which are not described in detail, are known in the art.
Claims (6)
1. The utility model provides an explosion-proof starting circuit of lithium cell group, includes lithium cell group (1), its characterized in that: the system also comprises a battery management system, a man-machine interaction unit (3), an overcurrent protection unit, a discharging unit, a charging unit, a starting system, a power supply total negative port (P5) and a communication output unit;
the battery management system comprises a battery management unit (21) and a battery control unit (22), wherein the battery management unit (21) is connected with the lithium battery pack (1) through a wire, the battery management unit (21) is connected with the battery control unit (22) through a CAN communication wire, and the man-machine interaction unit (3) is connected with the battery control unit (22) through a CAN communication wire; the power supply main negative port (P5) is connected with the negative electrode of the lithium battery pack (1) through a lead; the communication output unit is connected with the battery control unit (22) through a CAN communication wire;
one end of the discharging unit is connected with a starting system in the vehicle, and the other end of the discharging unit is connected with the overcurrent protection unit; one end of the charging unit is used for being connected with a positive port of an external charger, and the other end of the charging unit is connected with the discharging unit in parallel at one end of the overcurrent protection unit;
one end of the starting system is arranged on the battery control unit (22), and the other end of the starting system is arranged on a lead where the power supply total negative port (P5) is located.
2. The lithium battery pack explosion-proof starting circuit according to claim 1, wherein: the discharging unit comprises a discharging contactor (KM 1) and a discharging positive port (P1) which are sequentially connected in series, the discharging positive port (P1) is used for being connected with a positive port of a starting system in the vehicle, the discharging contactor (KM 1) is connected with one end of the overcurrent protection unit through a wire, and the battery control unit (22) is in signal connection with the discharging contactor (KM 1).
3. The lithium battery pack explosion-proof starting circuit according to claim 2, wherein: the charging unit comprises a charging contactor (KM 2) and a charging positive port (P2) which are sequentially connected in series, the charging positive port (P2) is used for being connected with an external charging machine positive port, the charging contactor (KM 2) is connected with one end of the overcurrent protection unit in parallel through a wire and the discharging contactor (KM 1), and the charging contactor (KM 2) is connected with the battery control unit (22) through signals.
4. The explosion-proof starting circuit of a lithium battery pack according to claim 3, wherein: the battery control unit (22) is connected to a wire between the discharge contactor (KM 1) and the overcurrent protection unit;
the starting system comprises a self-locking relay (J1) and a double-solution-point knob switch (K1), wherein the double-solution-point knob switch (K1) comprises a two-gear switch, namely a first knob switch (K1-1) and a second knob switch (K1-2); one end of the self-locking relay (J1) is connected to a lead where the power supply main negative terminal (P5) is located, the other end of the self-locking relay is connected to the battery control unit (22) through a lead, and the self-locking relay (J1) is in communication connection with the battery control unit (22); one end of the first knob switch (K1-1) is connected to the battery control unit (22) through a wire, and the other end of the first knob switch is connected to the wire where the power supply main negative terminal (P5) is located; both ends of the second knob switch (K1-2) are connected with the battery control unit (22) through leads; the first rotary switch (K1-1) and the second rotary switch (K1-2) are different in closing time period.
5. The explosion-proof starting circuit of a lithium battery pack according to claim 4, wherein: the overcurrent protection unit comprises a current transformer (42) and an overcurrent fuse (41), the charging contactor (KM 2) is connected with one end of the current transformer (42) in parallel through a wire and the discharging contactor (KM 1), the other end of the current transformer (42) is connected with the overcurrent fuse (41), the other end of the overcurrent fuse (41) is connected with the anode of the lithium battery pack (1) through a wire, and the current transformer (42) is connected with the battery control unit (22) through a wire.
6. The explosion-proof starting circuit of a lithium battery pack according to claim 5, wherein: the communication output unit comprises a high-speed CAN signal port (P3) and a low-speed CAN signal port (P4), wherein the high-speed CAN signal port (P3) and the low-speed CAN signal port (P4) are respectively connected with the battery control unit (22) through a CAN communication wire, and the two CAN communication wires are stranded into a strand at a part close to the battery control unit (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320579127.8U CN218958603U (en) | 2023-03-23 | 2023-03-23 | Explosion-proof starting circuit of lithium battery pack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320579127.8U CN218958603U (en) | 2023-03-23 | 2023-03-23 | Explosion-proof starting circuit of lithium battery pack |
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| CN218958603U true CN218958603U (en) | 2023-05-02 |
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| CN202320579127.8U Active CN218958603U (en) | 2023-03-23 | 2023-03-23 | Explosion-proof starting circuit of lithium battery pack |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117445757A (en) * | 2023-10-23 | 2024-01-26 | 安徽能通新能源科技有限公司 | Lithium battery capacity management system and method based on energy measurement technology |
| CN117445757B (en) * | 2023-10-23 | 2024-05-14 | 安徽能通新能源科技有限公司 | Lithium battery capacity management system and method based on energy measurement technology |
-
2023
- 2023-03-23 CN CN202320579127.8U patent/CN218958603U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117445757A (en) * | 2023-10-23 | 2024-01-26 | 安徽能通新能源科技有限公司 | Lithium battery capacity management system and method based on energy measurement technology |
| CN117445757B (en) * | 2023-10-23 | 2024-05-14 | 安徽能通新能源科技有限公司 | Lithium battery capacity management system and method based on energy measurement technology |
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