CN207530077U - A kind of lithium battery group balance of voltage repairs circuit - Google Patents
A kind of lithium battery group balance of voltage repairs circuit Download PDFInfo
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- CN207530077U CN207530077U CN201721504797.4U CN201721504797U CN207530077U CN 207530077 U CN207530077 U CN 207530077U CN 201721504797 U CN201721504797 U CN 201721504797U CN 207530077 U CN207530077 U CN 207530077U
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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 kind of lithium battery group balances of voltage to repair circuit, and including a main control MCU unit, main control MCU unit connects a digital display screen, operational and controlled key button, radiator fan.Main control MCU unit is connected with the total voltage measuring circuit of battery pack and single string battery core tension measuring circuit, total voltage measuring circuit is connected with total voltage measurement switching circuit, total voltage measuring circuit is connected with total electric discharge interface, total electric discharge interface connection battery pack, voltage gear switching circuit and discharge resistance, discharge resistance connect total discharge circuit.Single string battery core tension measuring circuit is connected with multicircuit relay switching circuit, and there are one single string battery core discharge circuits for each relay parallel connection.Discharge circuit of often going here and there all is connected there are one low-voltage detection circuit, and low-voltage detection circuit and single string electric discharge Lu Douyou are connected to cable socket interface.By cable socket interface and the thread plug of battery pack to inserting connection, discharge off and then it is balanced charging and realizes that balance is repaired.
Description
Technical field
The utility model is related to lithium battery group interlock circuit technical field, more particularly to a kind of lithium battery group balance of voltage
Repair circuit.
Background technology
Lithium battery group is all formed more by going here and there battery core by series connection and parallel combination, to the coherence request of battery core very
Height, although the pairing of battery core has been done by manufacturer, lithium battery group can all generate during much time using often goes here and there battery
Voltage it is inconsistent, the charging and discharging ability of battery pack entirety can be influenced, cause the energy to the output of battery pack that can decline,
So as to also influence the service life of battery pack.The repair method of lithium battery group pressure difference on the market is all to electricity using DC power supply
The battery core forced down plugs in, and such reparation is relatively time-consuming to take manually, and precision also is difficult to control or directly replaces voltage value
With capacity all as battery core recombinant, the method for repair is all more complicated.
Invention content
In order to solve above-mentioned the deficiencies in the prior art, the utility model provides a kind of lithium battery group balance of voltage and repairs electricity
Road, can be high in the case where not dismantling and replacing core strueture to the lithium battery group that electrical property declines caused by battery core pressure difference
Precision repairs pressure difference automatically, and repair process is time saving and energy saving, does not need to excessive human intervention.
Technical solution is used by the utility model：A kind of lithium battery group balance of voltage repairs circuit, it is characterized in that,
Including a main control MCU unit, main control MCU unit connects a digital display screen, operational and controlled key button, radiator fan.The main control MCU
Unit is connected with the total voltage measuring circuit of battery pack, and total voltage measuring circuit is connected with total voltage measurement switching circuit, total electricity
Pressure measuring circuit is connected with total electric discharge interface, and total discharge interface connection battery pack, voltage gear switching circuit and discharge resistance are put
Resistance connects total discharge circuit, and total discharge circuit is connected with the first optocoupler control circuit, the first optocoupler control circuit connection master
Control MCU units.
The main control MCU unit connects multiple relay switching circuits, and corresponding each relay switching circuit is connected with one
String battery core discharge circuit, each single string battery core discharge circuit are connected with low-voltage detection circuit, and low-voltage detection circuit is connected with
Cable socket interface, the battery pack of the more string battery core compositions of cable socket interface connection.
Each single string battery core discharge circuit connection start and stop driving circuit, start and stop driving circuit connect the control of the second optocoupler
Circuit, the second optocoupler control circuit connection main control MCU unit.
The low-voltage detection circuit is connected with single string battery core electric discharge and completes feedback circuit, total electric discharge Voltage Feedback electricity
Road, and feedback circuit is completed in single string battery core electric discharge, total electric discharge voltage feedback circuit connects the second optocoupler control circuit.
Each relay switching circuit is connected with charging circuit, charging circuit connection power circuit, single string battery core electricity
Press measuring circuit, single battery core tension measuring circuit of going here and there connects each relay switching circuit, and relay switching circuit switches to pair
Every a string of battery cores charging.
The repair process that the lithium battery group balance of voltage recited above repairs circuit includes the following steps：
Step 1：Operational and controlled key button, which starts, repairs circuit, carries out assembled battery total voltage electric discharge, discharge current is according to battery capacity
Size is adjusted, and by voltage gear switching circuit, is divided into five electric current gear 2A, 4A, 6A, 8A, 10A current discharges；
Step 2：The low-voltage detection circuit of each single string battery core connection detects the voltage of each single string battery core, works as step
In one assembled battery total voltage discharge process, voltage is less than protection value after certain a string of battery core electric discharge of low-voltage detection circuit detection
When, then step 1 is automatically stopped the electric discharge of whole group battery pack, enters step three single string battery core discharge in parallel；
Step 3：Each single string battery core of composition battery pack is connected by cable socket interface, and each single string battery core has
Corresponding single string battery core discharge circuit, corresponding each single string battery core discharge circuit are connected with low-voltage detection circuit, main control MCU unit
Control starts single string battery core discharge circuit, and when certain a string of battery core is first discharged to under-voltage protection value, i.e. string battery core electric discharge is automatic
Stop, other single string battery core discharge circuits continue to discharge, until whole battery cores are discharged to under-voltage protection value, pass through low-voltage
Detection circuit, the single string battery core discharge in parallel of the second optocoupler control circuit connection main control MCU unit output are completed, subsequently into step
Four charging circuits；
Step 4：Charging circuit starts, and relay switching circuit, which switches to, charges to each single string battery core, master control
MCU units measure maximum voltage value in searching battery pack by single battery core tension measuring circuit of going here and there, and the maximum voltage value is as it
The voltage reference value of its battery core charging, charges to voltage reference value by the low battery core of other voltages automatically；
Step 5：It completes battery voltage balance to repair, digital display screen is fed back to by main control MCU unit or sound carries
Show.
A kind of lithium battery group balance of voltage of the utility model repairs circuit, and main innovation includes its repair mode, using elder generation
Integrally discharge battery pack, discharge current can be adjusted according to battery capacity size, be divided into 5 electric current gear 2A, 4A, 6A,
8A, 10A, the big battery of capacity can then select maximum 10A current discharges, allow battery that electricity is bled off as soon as possible；It was discharging
Whole group electric discharge is then automatically stopped in journey when the voltage of certain string battery core is worth as low as protection, at this point, the battery core voltage of other strings may
It is also very high, it is unfavorable for balance and repairs, circuit system can be automatically into single serial parallel discharge mode.Discharge off and then progress
Equilibrium charging, in the case where not dismantling and replacing core strueture, High Precision Automatic reparation pressure difference, repair process always discharge -- electricity
Pressing detection, -- single serial parallel electric discharge -- voltage detecting -- battery core charging, repair process is time saving and energy saving, does not need to be excessive and artificially does
In advance, can also the situation that battery pack is damaged either with or without rosin joint or battery core artificially be judged by the method always discharged.
Description of the drawings
Fig. 1 is the schematic block circuit diagram of the utility model.
Fig. 2 is main control MCU element circuit structure chart.
Fig. 3 is total voltage measuring circuit and total voltage measurement switching circuit structure diagram.
Fig. 4 is that the 14-16 string battery cores for going here and there batteries for 16 correspond to relay switching charge-discharge circuit structure chart.
Fig. 5 is total discharge voltage gear switch circuit structure diagram.
Fig. 6 is total discharge circuit structure chart.
Fig. 7 is the 1-3 string battery core discharge in parallel circuit structure diagrams of single string battery core discharge in parallel circuit.
Specific embodiment
Illustrate the utility model below in conjunction with attached drawing and specific example, illustrative example here is only used for becoming apparent from
Explanation the utility model, and not as to the utility model application limit.
Attached drawing 1, as the schematic block circuit diagram of the utility model, a kind of lithium battery group balance of voltage repairs circuit, including
One main control MCU unit, main control MCU unit connect a digital display screen, operational and controlled key button, radiator fan.Main control MCU unit connects
There is the total voltage measuring circuit of battery pack, total voltage measuring circuit is connected with total voltage measurement switching circuit, and total voltage measures electricity
Road is connected with total electric discharge interface, and total interface connection battery pack, voltage gear switching circuit and discharge resistance, discharge resistance of discharging connects
Total discharge circuit is connect, total discharge circuit is connected with the first optocoupler control circuit, the first optocoupler control circuit connection main control MCU list
Member.
The main control MCU unit connects multiple relay switching circuits, and corresponding each relay switching circuit is connected with one
String battery core discharge circuit, each single string battery core discharge circuit are connected with low-voltage detection circuit, and low-voltage detection circuit is connected with
Cable socket interface, the battery pack of the more string battery core compositions of cable socket interface connection.
Each single string battery core discharge circuit connection start and stop driving circuit, start and stop driving circuit connect the control of the second optocoupler
Circuit, the second optocoupler control circuit connection main control MCU unit.
The low-voltage detection circuit is connected with single string battery core electric discharge and completes feedback circuit, total electric discharge Voltage Feedback electricity
Road, and feedback circuit is completed in single string battery core electric discharge, total electric discharge voltage feedback circuit connects the second optocoupler control circuit.
Each relay switching circuit is connected with charging circuit, charging circuit connection power circuit, single string battery core electricity
Press measuring circuit, single battery core tension measuring circuit of going here and there connects each relay switching circuit, and relay switching circuit switches to pair
Every a string of battery cores charging.
The repair process that the lithium battery group balance of voltage described in the present embodiment repairs circuit includes the following steps：
Step 1：Operational and controlled key button, which starts, repairs circuit, carries out assembled battery total voltage electric discharge, discharge current is according to battery capacity
Size is adjusted, and by voltage gear switching circuit, is divided into five electric current gear 2A, 4A, 6A, 8A, 10A current discharges；
Step 2：The low spot pressure detection circuit of each single string battery core connection detects the voltage of each single string battery core, works as step
In one assembled battery total voltage discharge process, voltage is less than protection value after certain a string of battery core electric discharge of low-voltage detection circuit detection
When, then step 1 is automatically stopped the electric discharge of whole group battery pack, enters step three single string battery core discharge in parallel；
Step 3：Each single string battery core of composition battery pack is connected by cable socket interface, and each single string battery core has
Corresponding single string battery core discharge circuit, corresponding each single string battery core discharge circuit are connected with low-voltage detection circuit, main control MCU unit
Control starts single string battery core discharge circuit, and when certain a string of battery core is first discharged to under-voltage protection value, i.e. string battery core electric discharge is automatic
Stop, other single string battery core discharge circuits continue to discharge, until whole battery cores are discharged to under-voltage protection value, pass through low-voltage
Detection circuit, the single string battery core discharge in parallel of the second optocoupler control circuit connection main control MCU unit output are completed, subsequently into step
Four charging circuits；
Step 4：Charging circuit starts, and relay switching circuit, which switches to, charges to each single string battery core, master control
MCU units measure maximum voltage value in searching battery pack by single battery core tension measuring circuit of going here and there, and the maximum voltage value is as it
The voltage reference value of its battery core charging, charges to voltage reference value by the low battery core of other voltages automatically；
Step 5：It completes battery voltage balance to repair, digital display screen is fed back to by main control MCU unit or sound carries
Show.
It is to disclose embodiment as the circuit structure of the present embodiment with reference to particular circuit configurations figure below.
Please refer to attached drawing 2, the main control MCU element circuit structure described in the present embodiment, attached drawing 3 for total voltage measuring circuit and
Total voltage measurement switching circuit, capacitance C57 pins are connected respectively to the common pin 7 of relay, 8 feet in figure, and normally closed pin 3 connects
To the ground wire of discharge circuit, normally closed pin 4 is connected to total voltage input terminal by resistance R333, and when static, voltage can pass through R333
It charges to C57；Normally opened pin 1 is connected to the ground wire of MCU, and 2 feet are connected to sample circuit R329, VR1, R330 of voltage measurement, when after
When electric appliance is attracted, 3,4 foot contacts of relay disconnect, and 7 feet and 1 foot are connected, and 8 feet and 2 feet are connected, and capacitance C57 is to sample circuit
The signal of sampling is input to MCU and reads data by electric discharge, circuit P16.
Voltage gear switching circuit as shown in Figure 4, voltage gear selection be since discharge range is wider, voltage from
12V-60V, electric current burn out part, so there is provided multiple electric discharges are negative from 2A-10A in order to avoid immediate current is excessive when discharging
It carries, main control MCU unit selects the load discharge of corresponding gear according to the height of voltage.This equipment shares the circuit list of 5 gears
Member, 5 gear corresponding voltage ranks are 12V, 24V, 36V, 48V, 60V.J17, J18, J19, J20, J21 are selected for gear in figure
Relay, Q110, Q111, Q112, Q113, Q114 are the triode for driving relay, and the base stage of triode passes through electricity respectively
Resistance R310, R311, R312, R313, R314 are connected to MCU respective pins；VCC is voltage input end, connects 5 relays respectively
The 2nd foot, since discharge load is connected to the 5th foot of normally opened pin of relay, thus under normality VCC be not with load connect
, only MCU first obtains that voltage parameter work judges and then the output phase answers the control signal of gear so that relay is attracted, VCC
Connection load, discharges by discharge circuit.
Total discharge circuit as shown in Figure 5, since the ground wire of total discharge circuit cannot be with the ground wire of main control MCU unit mainboard
It communicates, is controlled so making isolation using U36 optocouplers, 1,2 feet of the pulse signal through R367 to U36 that MCU is exported, in signal process
The coupling of portion photoelectricity, 3 feet of the identical signal of the 15 foot output duty cycles of U36 to comparator U35-A, when the level of 3 foot of comparator
Then 1 foot higher than 2 feet exports higher level pulse signal, and Q115 is connected at this time, RL1 connection load resistances, and discharge current passes through
Q115, R315, R317 form circuit, and electric current forms sample voltage value at R315, R317 parallel resistance both ends, this voltage amplitude is very
It is small, to pass through U35-B and amplify, the signal of amplification becomes DC level by D139, C62 filtering process, and level is using Q117
Emitter following is amplified, and the 5th feet of U36 are input to by R324 current-limiting resistances, after the linear coupling of optocoupler, the output of the 11st feet of U36
The duty ratio size of output is controlled to adjust discharge current to MCU, then by MCU with the voltage value of input linear variation.
The power supply of circuit is taken from the voltage of battery pack, by powering after reduction voltage circuit voltage stabilizing to the circuit, in circuit
The effect of R325 connection power supplys to 3 feet of U36 is upper electro-detection, just has electric current to pass through when battery connects, and the 13rd foot of U36 is just
There is high level signal to export to MCU, MCU obtains the circuit measuring voltage that signal just opens winged capacitance.
It is multiple relays switching charge-discharge circuit for 16 string battery designs as shown in Figure 6, due to every string battery core
Current potential height over the ground is all different, to measure voltage or the charging of every string battery core, it is desirable to special point-to-point switching
Circuit is connected to the positive and negative anodes of every string battery core, and circuit switching is done using relay in this case, and each relay corresponds to a string of battery cores,
When the relay of which string is attracted the battery core for which string that just measures or charge.
Attached drawing 6 is explained with 14-16 string switching circuits, and J14, J15, J16 are relay, and Q14, Q15, Q16 is drive
The triode of motor type relay work, by resistance R14, R15, R16, pin corresponding with MCU connects the base stage of triode respectively,
The effect of diode D14, D15, D16 are to absorb back emf pulse.Circuit F7, B14, F8, B16 are connected respectively to the 14th, 15,
The cable socket circuit of 16 string battery cores, i.e. F7 and B14 are connected to the 14th string battery core of battery pack, B14 by battery cable socket
The 15th string battery core is connected to F8, F8 and B16 are connected to the 16th string battery core.1 foot of all relays, which links together, is connected to master
The ground wire of plate, 2 feet, which also link together, to be connected on the circuit of DC3.7, and DC3.7 connects two parts circuit：One is attached to voltage
Sample circuit R29, VR2, R30 of measurement, sampled value are transmitted to MCU through oversampling circuit P15 and read data；Two are attached to charging electricity
Road will be charged when repairing battery core pressure difference by this circuit to the battery core for needing to charge.Since the 1 of relay, 2 feet are normally opened
Pin, so often string battery core with 1,2 is disconnected, ability and the connection of battery core positive and negative anodes only when relay is attracted.
Attached drawing 7 is single string battery core discharge in parallel circuit, is made with the 1st, 2 string battery core discharge circuits of single serial parallel discharge circuit
To illustrate, the circuit in figure between B1 and ground wire is the 1st string battery core discharge circuit, and the circuit between B2 and B1 is electric for the 2nd string
Core discharge circuit, B1 connect the anode of the 1st string battery core, and B2 connects the anode of the 2nd string battery core, and B1 is cathode relative to B2, successively mode
Superposition is per string location circuit, until to the 16th string.
The discharge cell circuit theory of 1-16 strings is identical, is explained herein with the circuit of the 1st string.Q21、R36、R37、
Q22, R40, C8, D21, R41, R38, D19 form the open and close circuit of closed loop, and effect is individually to lock the work of the discharge circuit
State is not influenced by other element circuits；BQ1 connections electric discharge starts control circuit, as long as moment low level can open this
Circuit；BT1 connections stop the control circuit of electric discharge（Stop signal has two aspects：First, the stop signal of manual operation, the opposing party
Face is the signal that low-voltage protection circuit is sent out）, when the level of BT1 is pulled low, Q22 stops conducting, Q21 is caused also to stop defeated
Go out, discharge circuit just stopped work.
BD1 connections are discharged LED light, and LED is lighted when electric discharge；BL1 connections are discharged feedback circuit, are height during electric discharge
Level exports, and is then low level after being discharged.
R34, D18, U2-A, R32, Q20, C7, C33, Q19, R39 form the circuit of constant-current discharge in Fig. 7.D181 is U2-A
3 feet provide reference voltage, R39 is current sampling resistor, and Q20 provides enough bias currents for Q19, Q19 is made linearly to be connected,
The electric current of output generates pressure drop when passing through sampling resistor R39, and comparator U2-A makes comparisons sampled voltage with reference voltage, automatically
The voltage value of 1 foot of comparator output is adjusted to control discharge current constant.
It by the implementation of the utility model technology, realizes to lithium battery group balance of voltage reparation, can not dismantle and more
-- voltage detecting -- single serial parallel electric discharge -- of changing High Precision Automatic reparation pressure difference in the case of core strueture, repair process always discharges
Voltage detecting -- battery core equilibrium charging, repair process is time saving and energy saving, does not need to excessive human intervention, can also be by always discharging
Method, it is artificial to judge battery pack either with or without rosin joint or the situation of battery core damage.
Above-described embodiment of the utility model is only intended to clearly illustrate the utility model example, and is not
Restriction to the embodiment of the utility model.And for belong to the connotation of the utility model extend out it is apparent
Variation or variation still fall within the scope of protection of the utility model.
Claims (1)
1. a kind of lithium battery group balance of voltage repairs circuit, which is characterized in that including：
One main control MCU unit, main control MCU unit connect a digital display screen, operational and controlled key button, radiator fan；
The main control MCU unit is connected with the total voltage measuring circuit of battery pack, and total voltage measuring circuit is connected with total voltage survey
Switching circuit is measured, total voltage measuring circuit is connected with total electric discharge interface, total interface connection battery pack, voltage gear switch electricity of discharging
Road and discharge resistance, discharge resistance connect total discharge circuit, and total discharge circuit is connected with the first optocoupler control circuit, the first optocoupler
Control circuit connects main control MCU unit；
The main control MCU unit connects multiple relay switching circuits, and corresponding each relay switching circuit is connected with a string of electricity
Core discharge circuit, each single string battery core discharge circuit are connected with low-voltage detection circuit, and low-voltage detection circuit is connected with winding displacement
Jack interface, the battery pack of the more string battery core compositions of cable socket interface connection；
Each single string battery core discharge circuit connection start and stop driving circuit, start and stop driving circuit connect the second optocoupler control electricity
Road, the second optocoupler control circuit connection main control MCU unit；
The low-voltage detection circuit is connected with single string battery core electric discharge and completes feedback circuit, total electric discharge low-voltage feedback circuit, and
Feedback circuit is completed in single string battery core electric discharge, total electric discharge low-voltage feedback circuit connects the second optocoupler control circuit；
Each relay switching circuit is connected with charging circuit, and charging circuit connection power circuit, single string battery core voltage are surveyed
Circuit is measured, single battery core tension measuring circuit of going here and there connects each relay switching circuit, and relay switching circuit is switched to each
Battery core of going here and there charges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721504797.4U CN207530077U (en) | 2017-11-13 | 2017-11-13 | A kind of lithium battery group balance of voltage repairs circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721504797.4U CN207530077U (en) | 2017-11-13 | 2017-11-13 | A kind of lithium battery group balance of voltage repairs circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207530077U true CN207530077U (en) | 2018-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721504797.4U Active CN207530077U (en) | 2017-11-13 | 2017-11-13 | A kind of lithium battery group balance of voltage repairs circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109130907A (en) * | 2018-07-30 | 2019-01-04 | 苏州小蜻蜓电动车有限公司 | A kind of easy-to-mount electric bicycle modularization power supply system |
| CN109786863A (en) * | 2017-11-13 | 2019-05-21 | 屈海强 | A kind of lithium battery group balance of voltage repairs circuit and restorative procedure |
-
2017
- 2017-11-13 CN CN201721504797.4U patent/CN207530077U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109786863A (en) * | 2017-11-13 | 2019-05-21 | 屈海强 | A kind of lithium battery group balance of voltage repairs circuit and restorative procedure |
| CN109130907A (en) * | 2018-07-30 | 2019-01-04 | 苏州小蜻蜓电动车有限公司 | A kind of easy-to-mount electric bicycle modularization power supply system |
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