CN206517085U - Intelligent discharge circuit - Google Patents
Intelligent discharge circuit Download PDFInfo
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- CN206517085U CN206517085U CN201621447705.9U CN201621447705U CN206517085U CN 206517085 U CN206517085 U CN 206517085U CN 201621447705 U CN201621447705 U CN 201621447705U CN 206517085 U CN206517085 U CN 206517085U
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Abstract
The utility model discloses a kind of Intelligent discharge circuit, the discharge circuit includes：For the lithium battery being powered to load, to load provide the main discharge circuit of heavy-current discharge, the pre-arcing circuit of low discharging current is carried out to load, for detecting the detection module for loading both end voltage and exporting corresponding magnitude of voltage, the main control chip that the magnitude of voltage control main discharge circuit or pre-arcing circuit exported according to detection module is discharged, the control module for triggering or terminating main control chip work.The beneficial effects of the utility model are that heavy current impact of the powerful devices such as electric bicycle, motorcycle in booting moment can be solved, it is to avoid the connectivity port of lithium battery produces spark, extend the service life of connector；Avoid controlling load equipment the rush of current of circuit, reduce the damage to controller or service life shortens.
Description
Technical field
The utility model is related to the technology technical field on great-capacity power battery safe-discharge road, more particularly to a kind of intelligence
Discharge circuit.
Background technology
Current high-power lithium battery BMS is without intelligent pre-arcing function, and power switch directly opens high current master after opening
Electric discharge is powered to load.As shown in figure 1, after power switch is opened, high current main discharge circuit is opened completely immediately, greatly
Capacity Lithium batteries are powered by main discharge circuit to load, but because load equipment has the input of Large Copacity for system processed
Filter capacitor, when discharge loop is opened, high voltage needs the input capacitance first to load equipment to be charged, and now electric current can
Up to the rank of kiloampere, great rush of current can be caused to cell connection terminal, load control system, thus easily damage or
The service life of serious curtailment control system.
Utility model content
Of the present utility model mainly to propose a kind of Intelligent discharge circuit, its object is to solve electric bicycle, motor
Heavy current impact of the powerful devices such as car in booting moment, it is to avoid the connectivity port of lithium battery produces spark, extends connector
Service life and enhance reliability；Avoid controlling load equipment the rush of current of circuit, reduce the damage to controller
Or service life shortens.
To achieve the above object, the utility model proposes Intelligent discharge circuit, including for being powered to load
Lithium battery, it is connected with the two ends of load, and the two ends of load are parallel with the load filter capacitor for filtering unstable voltage.Also wrap
Include：To load provide the main discharge circuit of heavy-current discharge, the pre-arcing circuit of low discharging current is carried out to load, is used for
Detection load both end voltage and the detection module for exporting corresponding magnitude of voltage, the magnitude of voltage control master exported according to detection module are put
The main control chip that circuit or pre-arcing circuit are discharged, the control module for triggering or terminating main control chip work.
The input of main discharge circuit and output end are connected to lithium battery with the connection circuit of load, and being formed and being discharged back
Road.The controlled end of main discharge circuit and the first output end of main control chip are connected.The input of pre-arcing circuit connects with output end
It is connected on lithium battery to be connected on circuit with load, and is parallel relationship with main discharge circuit, and forms another discharge loop.Pre-arcing
The controlled end of circuit and the second output end of main control chip are connected.The control end of control module and the power supply controlled end of main control chip
Connection.The connection of main control chip voltage input end and lithium battery.Two inputs of detection module are connected in parallel on the two ends of load, and its is defeated
Go out end to be connected with the detection input of main control chip.
Preferably, main discharge circuit includes the first metal-oxide-semiconductor, the grid of the first metal-oxide-semiconductor and the first output end of main control chip
Connection, the source electrode of the first metal-oxide-semiconductor and the negative pole of lithium battery, the GND ends of main control chip are connected, the drain electrode and load of the first metal-oxide-semiconductor
Connection.
Preferably, pre-arcing circuit includes the second metal-oxide-semiconductor and the resistance for current limliting.The grid of 2nd MOS pipes and master
The second output end connection of chip is controlled, the source electrode of the second metal-oxide-semiconductor and the negative pole of lithium battery, the GND ends of main control chip are connected.Second
The drain electrode of metal-oxide-semiconductor is connected by resistance with load.
Preferably, control module includes power switch, the power supply controlled end connection of its two ends and main control chip.
Preferably, the first metal-oxide-semiconductor and the second metal-oxide-semiconductor are N-type metal-oxide-semiconductor.
The beneficial effects of the utility model are the moment for avoiding lithium battery from starting power supply to load, the connection to lithium battery
The heavy current impact that port is caused, and produce pyrophoric phenomenon in connectivity port.The utility model can extend lithium battery with bearing
The service life of connector between load, and increase its reliability；The electricity that high current controls load equipment circuit is reduced simultaneously
Stream impact, it is to avoid controller is damaged, to extend the service life of controller.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the accompanying drawing used required in description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to the structure shown in these accompanying drawings.
Fig. 1 is the schematic diagram of existing lithium battery discharge circuit；
Fig. 2 is the schematic diagram of the embodiment of the utility model Intelligent discharge circuit one.
Realization, functional characteristics and the advantage of the utility model purpose will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
The utility model proposes a kind of Intelligent discharge circuit.
Reference picture 2, Fig. 2 is the schematic diagram of the embodiment of the utility model Intelligent discharge circuit one.
As shown in Fig. 2 in the utility model embodiment, the Intelligent discharge circuit includes being used for being powered load 2
Lithium battery, to load 2 carry out provide heavy-current discharges main discharge circuits, to load 2 carry out low discharging currents pre-arcing
Circuit, for detecting the detection module 3 for loading 2 both end voltages and exporting corresponding magnitude of voltage, the electricity exported according to detection module 3
Pressure value controls the main control chip 1 that main discharge circuit or pre-arcing circuit are discharged, and is worked for triggering or terminating main control chip 1
Control module.The both positive and negative polarity of lithium battery is connected with the two ends of load 23, and the two ends of load 23 are parallel with the unstable voltage of filtering
Load filter capacitor C, with increase load 2 both end voltages stability.
The input of main discharge circuit is connected to output end on the connection circuit of lithium battery and load 2, and forms electric discharge
Loop.Specifically, main discharge circuit includes the first metal-oxide-semiconductor M1.In the present embodiment, the first metal-oxide-semiconductor M1 is N-type metal-oxide-semiconductor M1.The
One metal-oxide-semiconductor M1 grid is the controlled end of main discharge circuit, and it is connected with the first output end of main control chip 1.First metal-oxide-semiconductor M1
Source electrode and the negative pole of lithium battery, the GND ends of main control chip 1 connect, the first metal-oxide-semiconductor M1 drain electrode is connected with loading 2.Work as master control
First output end of chip 1 exports high level to the first metal-oxide-semiconductor M1 grid so that the first metal-oxide-semiconductor M1 drain electrode is led with source electrode
It is logical, so as to connect whole discharge loop, load 2 is powered.
The input of pre-arcing circuit and output end are connected to lithium battery and are connected with load 2 on circuit, and with main discharge road
For parallel relationship, and form another discharge loop.The controlled end of pre-arcing circuit is connected with the second output end of main control chip 1.
Specifically, pre-arcing circuit includes the first metal-oxide-semiconductor M2 and resistance R for current limliting.In the present embodiment, the first metal-oxide-semiconductor M2
For N-type metal-oxide-semiconductor.First metal-oxide-semiconductor M2 grid is the controlled end of pre-arcing circuit, and the second output end of itself and main control chip 1 connects
Connect.First MOS pipes M2 source electrode and the negative pole of lithium battery, the GND ends of main control chip 1 are connected.First metal-oxide-semiconductor M2 drain electrode is led to
Resistance R is crossed to be connected with load 2.When the second output end of main control chip 1 exports high level so that the first metal-oxide-semiconductor M2 is turned on, from
And pre-arcing loop is connected, load 2 and load filter capacitor C are powered.Meanwhile, current limliting is carried out by resistance R, really
Lithium battery is protected when preventing electrical circuit connecting the moment of electric discharge, spark will not be produced in its connectivity port.It should be noted that
In the present embodiment, resistance R represents metering function, without representing whole current-limiting circuit.
The control end of control module is connected with the power supply controlled end of main control chip 1.Specifically, control module is opened including power supply
K is closed, its two ends is connected with the power supply controlled end of main control chip 1.When power switch K is closed, triggering main control chip 1 starts work
Make；If power switch K disconnects, main control chip 1 terminates work, and lithium battery stops being powered load 2.In addition, whenever electricity
Source switch K disconnects, and main control chip 1 will restPose, and acquiescence first exports high level to the second output end, low level to first
Output end.
The connection of the voltage input end of main control chip 1 and lithium battery, to obtain operating voltage by lithium battery.
Two inputs of detection module 3 are connected in parallel on the two ends of load 2, its output end and the detection input of main control chip 1
Connection.Loading filter capacitor C has a safe operating voltage point, when detection module 3 detects the voltage of the voltage at 2 two ends of load
During more than the safe operating voltage point, main control chip 1 just controls pre-arcing circuit to discharge load 2；If conversely, detection mould
When the voltage that block 3 detects the voltage at 2 two ends of load is less than the safe operating voltage point, main control chip 1 just controls main discharge electricity
Road is discharged by load 2.
The course of work of the present utility model：After power switch is closed, triggering main control chip 1 is started working, original state
Under, the acquiescence output high level of main control chip 1 is to the second output end, and low level is to the first output end, so that pre-arcing circuit is opened,
And current limliting is carried out by resistance R.It should be noted that electric current can suitably be adjusted according to the different equipment of load 2, in this reality
Apply in example, the current limit put back in advance in road is in 100mA or so, to ensure connecing connectivity port and will not producing spark for lithium battery,
And avoid controlling circuit to cause heavy current impact load 2.After pre-arcing circuit is connected, lithium battery carries out low current to load 2
Electric discharge, while carrying out low current charge to load filter capacitor C.In addition, detection module 3 can monitor the electricity at 2 two ends of load in real time
Pressure, after filter capacitor C both end voltages are loaded by low current charge to safe operating voltage point, main control chip 1 will send low
Level to the first metal-oxide-semiconductor M2 grid, so as to close pre-arcing road.Meanwhile, main control chip 1 exports high level to the first metal-oxide-semiconductor
M1 grid, to open the first metal-oxide-semiconductor M1, connects main discharge circuit, it is ensured that load 2 results in sufficiently large operating current branch
Hold.From it is pre- let off journey be switched to it is main put process time and can be controlled by main control chip 1 within 100mS, effectively ensure not influence whole
The startup and work of 2 systems of individual load.
Technical solutions of the utility model increase pre-arcing circuit in the discharge loop of lithium battery, are controlled by main control chip 1
The folding of the first metal-oxide-semiconductor M2 conduct either analog pre-arcing circuit is made, and the electric current in pre-arcing loop is limited by resistance R, from
And effectively solve heavy current impact of the powerful devices such as electric bicycle, motorcycle in booting moment.Lithium battery is in pre-arcing
During circuit discharging, spark will not be produced in the connectivity port of lithium battery, improve the security of lithium battery electric discharge；And
And, also load 2 will not be controlled circuit to cause rush of current and damage controller, improve load 2 controls the reliable of circuit
Property, extend the service life of controller.
Preferred embodiment of the present utility model is the foregoing is only, the scope of the claims of the present utility model is not thereby limited,
It is every under inventive concept of the present utility model, the equivalent structure made using the utility model specification and accompanying drawing content is become
Change, or directly/be used in other related technical fields indirectly and be included in scope of patent protection of the present utility model.
Claims (5)
1. a kind of Intelligent discharge circuit, including the lithium battery for being powered to load, it is connected with the two ends of load, load
Two ends be parallel with the load filter capacitor for filtering unstable voltage, it is characterised in that also include：Big electricity is provided to load progress
The main discharge circuit of electricity is banished, the pre-arcing circuit of low discharging current is carried out to load, both end voltage is loaded and defeated for detecting
Go out the detection module of corresponding magnitude of voltage, the magnitude of voltage exported according to the detection module controls the main discharge circuit or described
The main control chip that pre-arcing circuit is discharged, the control module for triggering or terminating the main control chip work；
The input of the main discharge circuit and output end are connected to lithium battery with the connection circuit of load, and being formed and being discharged back
Road；The controlled end of the main discharge circuit is connected with the first output end of the main control chip；The input of the pre-arcing circuit
End is connected to lithium battery with output end and is connected with load on circuit, and is parallel relationship with the main discharge circuit, and forms another
One discharge loop；The controlled end of the pre-arcing circuit is connected with the second output end of the main control chip；The control module
Control end be connected with the power supply controlled end of the main control chip；The company of the main control chip voltage input end and the lithium battery
Connect；Two inputs of the detection module are connected in parallel on the two ends of load, its output end and the detection input of the main control chip
Connection.
2. Intelligent discharge circuit as claimed in claim 1, it is characterised in that the main discharge circuit includes the first metal-oxide-semiconductor, institute
State the grid of the first metal-oxide-semiconductor to be connected with the first output end of the main control chip, source electrode and the lithium electricity of first metal-oxide-semiconductor
The GND ends connection of the negative pole in pond, the main control chip, the drain electrode of first metal-oxide-semiconductor is connected with the load.
3. Intelligent discharge circuit as claimed in claim 1, it is characterised in that the pre-arcing circuit include the second metal-oxide-semiconductor with
And the resistance for current limliting；The grid of second metal-oxide-semiconductor is connected with the second output end of the main control chip, and described second
The source electrode of metal-oxide-semiconductor is connected with the negative pole of the lithium battery, the GND ends of the main control chip；The drain electrode of second metal-oxide-semiconductor passes through
The resistance is connected with load.
4. Intelligent discharge circuit as claimed in claim 1, it is characterised in that the control module includes power switch, and it two
End is connected with the power supply controlled end of the main control chip.
5. Intelligent discharge circuit as claimed in claim 2, it is characterised in that first metal-oxide-semiconductor is N-type metal-oxide-semiconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621447705.9U CN206517085U (en) | 2016-12-27 | 2016-12-27 | Intelligent discharge circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621447705.9U CN206517085U (en) | 2016-12-27 | 2016-12-27 | Intelligent discharge circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206517085U true CN206517085U (en) | 2017-09-22 |
Family
ID=59862350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621447705.9U Active CN206517085U (en) | 2016-12-27 | 2016-12-27 | Intelligent discharge circuit |
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| Country | Link |
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| CN (1) | CN206517085U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111224437A (en) * | 2018-11-24 | 2020-06-02 | 深圳市三奇科技有限公司 | Battery control panel working method, battery control panel and unmanned aerial vehicle |
| CN111478404A (en) * | 2020-05-13 | 2020-07-31 | 中颖电子股份有限公司 | Discharging system and discharging control method for lithium battery management system |
| CN112398109A (en) * | 2019-08-13 | 2021-02-23 | 北京极智嘉科技有限公司 | Power supply loop, carrying equipment and power supply control method |
| CN113858957A (en) * | 2021-10-11 | 2021-12-31 | 深圳市嘉佰达电子科技有限公司 | Battery switch-free ignition prevention protection method and circuit |
| CN115459412A (en) * | 2022-11-10 | 2022-12-09 | 苏州绿恺动力电子科技有限公司 | Battery pre-discharge control system and control method |
-
2016
- 2016-12-27 CN CN201621447705.9U patent/CN206517085U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111224437A (en) * | 2018-11-24 | 2020-06-02 | 深圳市三奇科技有限公司 | Battery control panel working method, battery control panel and unmanned aerial vehicle |
| CN112398109A (en) * | 2019-08-13 | 2021-02-23 | 北京极智嘉科技有限公司 | Power supply loop, carrying equipment and power supply control method |
| CN112398109B (en) * | 2019-08-13 | 2023-02-03 | 北京极智嘉科技股份有限公司 | Power supply loop, carrying equipment and power supply control method |
| CN111478404A (en) * | 2020-05-13 | 2020-07-31 | 中颖电子股份有限公司 | Discharging system and discharging control method for lithium battery management system |
| CN111478404B (en) * | 2020-05-13 | 2023-07-14 | 中颖电子股份有限公司 | Discharging system and discharging control method for lithium battery management system |
| CN113858957A (en) * | 2021-10-11 | 2021-12-31 | 深圳市嘉佰达电子科技有限公司 | Battery switch-free ignition prevention protection method and circuit |
| CN115459412A (en) * | 2022-11-10 | 2022-12-09 | 苏州绿恺动力电子科技有限公司 | Battery pre-discharge control system and control method |
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