CN215042107U - Lithium battery power-on control system - Google Patents
Lithium battery power-on control system Download PDFInfo
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- CN215042107U CN215042107U CN202120542011.8U CN202120542011U CN215042107U CN 215042107 U CN215042107 U CN 215042107U CN 202120542011 U CN202120542011 U CN 202120542011U CN 215042107 U CN215042107 U CN 215042107U
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- control unit
- main relay
- switch
- electric core
- control
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Abstract
The utility model relates to a power control system on lithium cell belongs to battery control technical field. The utility model discloses increase an independent switch on the power supply circuit of electric core control unit in order to control the start-up and the closing of electric core control unit, when the lithium battery system need supply power to the outside, control switch closure earlier, after switch closure, electric core control unit is electrified and is started work, and electric core control unit controls the normally open contact closure of main relay through its control interface to put through the power supply circuit of whole car control unit, make whole car control unit go up the electric work; after the whole vehicle control unit is electrified to work (namely, the normally open contact of the main relay is closed), the whole vehicle switch is controlled to be closed, and the action of the main relay contact switch is finished at the moment, so that the capacitive load caused by the closing of the whole vehicle switch can not impact the main relay, and the problem that the main relay is damaged by impact current caused by the direct conduction of a rear end loop when the main relay is closed is avoided.
Description
Technical Field
The utility model relates to a power control system on lithium cell belongs to battery control technical field.
Background
Most of battery products used on the current low-speed electric vehicle use lead-acid batteries, and due to the defects of the lead-acid batteries, the demand of replacing the lead-acid batteries with lithium batteries is more and more extensive. When the existing lithium battery is applied to a vehicle, the lithium battery starting switch is directly connected to a power-on switch of the whole vehicle. By the control mode, the impact of the super-large current generated when the whole vehicle is electrified directly acts on electric devices in the battery, and the relay in the battery is easily damaged.
The main solution adopted in the industry at present is to add a pre-charging circuit in a battery box, reduce the ultra-large impact current generated when the whole vehicle is powered on, and reduce the impact on the closing of a relay in the battery box. The method can only reduce the impact current received when the relay is closed to a certain extent, can not completely avoid the impact of the current, and still has the risk of damaging the relay in the battery box.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a power control system on lithium cell to solve the electric current impact problem of in-process to battery box internal relay on present lithium cell.
The utility model provides a solve above-mentioned technical problem and provide a power control system on lithium cell, including battery module, main relay, electric core the control unit, put in order car the control unit and put in order the car switch, battery module is connected with the power supply end of putting in order the car the control unit through the normally open contact of main relay, and electric core the control unit is connected main relay, power module's one end is connected with the detection port of putting in order the car the control unit through putting in order the car switch, be provided with switch on electric core the power supply loop of the control unit, the detection mouth of putting in order the car the control unit is connected with battery module through putting in order the car the control switch.
The utility model discloses increase an independent switch on the power supply circuit of electric core control unit in order to control the start-up and the closing of electric core control unit, when the lithium battery system need supply power to the outside, control switch closure earlier, after switch closure, electric core control unit is electrified and is started work, and electric core control unit controls the normally open contact closure of main relay through its control interface to put through the power supply circuit of whole car control unit, make whole car control unit go up the electric work; after the whole vehicle control unit is electrified to work (namely, the normally open contact of the main relay is closed), the whole vehicle switch is controlled to be closed, and the action of the main relay contact switch is finished at the moment, so that the capacitive load caused by the closing of the whole vehicle switch can not impact the main relay, and the problem that the main relay is damaged by impact current caused by the direct conduction of a rear end loop when the main relay is closed is avoided.
Further, in order to prevent the influence of overcurrent on the main relay, a fuse is arranged between the battery module and the normally open contact of the main relay.
Further, the battery cell control unit is connected with each battery cell in the battery module and is used for collecting current and voltage of each battery cell in the battery module.
Drawings
FIG. 1 is a schematic circuit diagram of a conventional lithium battery power-on control system;
fig. 2 is a schematic circuit structure diagram of the electrical control system for lithium battery of the present invention.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings.
The utility model discloses an increase an solitary control switch (for short switch) on electric core control unit's power supply circuit to control electric core control unit's start-up and closing, when lithium battery system need external power supply, control switch closure earlier, after the switch closure, electric core control unit gets electric power and starts work, and electric core control unit controls the contact switch closure of main relay through its control interface to put through the power supply circuit of whole car control unit, make whole car control unit go up electric work; after the whole vehicle control unit is electrified to work (namely, the contact switch of the main relay is closed), the whole vehicle switch is controlled to be closed, and the action of the contact switch of the main relay is finished at the moment, so that the capacitive load caused by the closing of the whole vehicle switch can not impact the main relay, and the problem that the main relay is damaged by impact current caused by direct conduction of a rear end loop when the main relay is closed is avoided.
As shown in fig. 1, the current power-on control system for a lithium battery includes a battery end and a vehicle end, wherein the battery end includes a battery module, a battery core control unit and a main relay, the vehicle end includes a vehicle control unit, the battery module is connected to the vehicle control unit through the main relay for power supply, a negative power supply end of the battery core control unit is connected to a negative electrode of the battery module, a positive power supply end is connected to a positive electrode of the battery module through a master control switch K1, and meanwhile, a detection port of the vehicle control unit is also connected to a positive electrode of the battery module through a master control switch K1. When needing to be electrified, the control master switch K1 is closed, the electric core control unit is electrified, the electric core control unit controls the contact switch of the main relay to be closed, and the whole vehicle control unit is electrified. Although the system can realize the electrification of the vehicle under the control of the master control switch K1, when the electrification control system is in electrification control, the closing of the master control switch K1 can enable the whole vehicle control unit to have a capacitive load, meanwhile, the closing of the master control switch K1 can enable the contact switch of the main relay to act, the capacitive load can bring large current impact to the main relay when the contact switch of the main relay acts, and the service life of the main relay is further influenced.
Therefore, the utility model discloses improve on above-mentioned electric control system's on lithium cell basis, as shown in fig. 2, also including battery end and whole car end, wherein the battery end includes battery module, electric core the control unit and main relay, whole car end is including whole car the control unit, battery module connects whole car the control unit through the normally open contact power supply of main relay, battery module passes through switch K2 and connects electric core the control unit's power end, the power supply of the electric core the control unit that has got is by switch K2 independent control, main relay is by electric core the control unit control connection, whole car switch K3 sets up on the circuit between whole car the control unit's detection port and battery module positive pole. In order to realize overcurrent protection, a fuse is also arranged between the anode of the battery module and the main relay. When power-on is needed, the power switch K2 is controlled to be closed, the battery cell control unit is powered on by closing the power switch K2, the battery cell control unit is started, the main relay is controlled, the contact switch of the main relay is closed, and the control unit of the whole vehicle is powered on; and after the whole vehicle control unit is electrified, the whole vehicle switch K3 is controlled to be closed, and the whole vehicle control unit performs subsequent control operation after detecting that the whole vehicle switch is closed. This power-on control system can make main relay contact switch closure through closed switch K2 earlier before whole car switch K3 is closed, and the capacitive load that brings when whole car switch K3 is closed can not bring the influence of electric current impact to main relay like this to main relay's life-span has been improved.
Claims (3)
1. The utility model provides a lithium cell power-on control system, includes battery module, main relay, electric core the control unit, puts in order car the control unit and puts in order the car switch, battery module is connected with the power supply end of putting in order the car the control unit through the normally open contact of main relay, and electric core the control unit is connected main relay, power module's one end is passed through and is put in order the car switch and be connected with putting in order the detection port of car the control unit, its characterized in that, be provided with switch on electric core the power supply loop of the control unit, the detection port of putting in order the car the control unit is connected with battery module through putting in order the car the control switch.
2. A lithium battery electrification control system according to claim 1, wherein a fuse is provided between the battery module and the normally open contact of the main relay.
3. The electrical control system for the lithium battery of claim 1 or 2, wherein the cell control unit is connected to each cell in the battery module, and is configured to collect current and voltage of each cell in the battery module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120542011.8U CN215042107U (en) | 2021-03-16 | 2021-03-16 | Lithium battery power-on control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120542011.8U CN215042107U (en) | 2021-03-16 | 2021-03-16 | Lithium battery power-on control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215042107U true CN215042107U (en) | 2021-12-07 |
Family
ID=79261154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120542011.8U Active CN215042107U (en) | 2021-03-16 | 2021-03-16 | Lithium battery power-on control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215042107U (en) |
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2021
- 2021-03-16 CN CN202120542011.8U patent/CN215042107U/en active Active
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