CN206099397U - Moving equilibrium self -adaptation voltage detection circuit - Google Patents
Moving equilibrium self -adaptation voltage detection circuit Download PDFInfo
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- CN206099397U CN206099397U CN201620958175.8U CN201620958175U CN206099397U CN 206099397 U CN206099397 U CN 206099397U CN 201620958175 U CN201620958175 U CN 201620958175U CN 206099397 U CN206099397 U CN 206099397U
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- battery
- voltage
- moving equilibrium
- cells
- circuit
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Abstract
The utility model relates to a moving equilibrium self -adaptation voltage detection circuit for among the lithium battery supply management system, lithium battery supply management system includes equal of every battery in the group battery of establishing ties, change over switch connect can monitor the battery whether be in fill, cross put, superheat state and send corresponding drive signal's group battery the control unit, moving equilibrium self -adaptation voltage detection circuit includes the battery voltage monitoring chip that links to each other with group battery, group battery the control unit, and wherein battery voltage monitoring chip is connected with independent power of keeping apart. Adopt the utility model discloses a moving equilibrium self -adaptation voltage detection circuit, even at the whole duty cycle in -process battery pack major loop of moving equilibrium remaining a small amount of battery only, normal work that battery pack voltage monitoring circuit's power input voltage still can holding circuit.
Description
Technical field
This utility model belongs to lithium battery charge and discharge protective technical field, and in particular to a kind of moving equilibrium adaptive voltage
Detection circuit.
Background technology
Normally, dynamic lithium battery is used in series in groups.But it is conforming due to there are problems that between battery, cause " wood
The appearance of bucket effect ", i.e. set of cells total electricity are limited by certain cell, and a cell can only be full of by charging, whole
Individual set of cells is discontented with so that battery power discharge capacity diminishes.Equally, need to cut if having monomer to reach setting value during battery power discharge
Disconnected discharge loop reduces battery power discharge capacity to avoid overdischarge, further.
It is for this people using some charge and discharge balancing technologies attempting to improve this problem, balanced including passive type
The correlation techniques such as (energy dissipation formula), active equilibrium (energy transfer formula).Current balancing technique is all based on shunting principle,
For the cell for deviateing many number intervals or shunting Reduction of Students' Study Load is carried out on the premise of the performance loop of battery is not turned off, or
Carry out supplement of confluxing.Its existing problem is powerful shunting, effect of confluxing is difficult to realize, and is overcharged when cell is in
Continuous firing is still needed to when electricity, overdischarge, cell degradation can be accelerated when Balance route measure matching is not good；Simultaneously also cannot letter
Singly with new battery replacement used batteries.
Utility model patent (application number 201620429393.2) proposes a kind of lithium battery pack management system, the device profit
With the method for moving equilibrium (cutout is balanced), overcharging, crossing and put for battery cell can be realized in the way of relatively simple, economical
The protection of abnormality, so as to improving the use capacity of set of cells and extending the service life of set of cells, and occurs in battery
Can will damage battery to remove from major loop during incipient fault, allow remaining battery to continue to provide electric power, improve battery system
Reliability.But the patent causes the difficulty in Project Realization for lithium battery voltage observation circuit.Usually, lithium battery
The power supply supply of pressure observation circuit is from set of cells, therefore may require that battery voltage can not be too low, than if desired for higher than 9V.
But moving equilibrium method can cause the voltage of set of cells major loop to be likely lower than such restriction voltage, cause electric voltage observation circuit
Operation irregularity.Therefore need a kind of adaptable solution.
Utility model content
Lithium battery voltage observation circuit power supply is supplied in order to overcome moving equilibrium method to cause battery voltage too low
Adverse effect, the purpose of this utility model is to provide a kind of adaptive lithium battery voltage observation circuit scheme of moving equilibrium,
When can cause that series-connected cell quantity is little in set of cells major loop, (such as one or two) can still allow electric voltage observation circuit normal work.
Its principle is that the 5V that the last battery detection node that battery voltage monitors chip low voltage side is accessed independent isolating is straight
Stream power supply, so, even if set of cells major loop is only left one or two battery, battery voltage still can reach minimum requirements voltage
In (such as 9V), therefore the whole working cycle process of moving equilibrium, the power input voltage of battery voltage observation circuit can be tieed up
Hold the normal work of circuit.
To reach object above, the technical solution adopted in the utility model is：A kind of moving equilibrium adaptive voltage detection
Circuit, for lithium battery management system in, the lithium battery management system is included in every in the set of cells of series connection
Individual battery one permutator of parallel connection, the permutator connection can monitor the battery whether in overcharge, cross put, mistake
Warm status simultaneously send the set of cells control unit of respective drive signal；Moving equilibrium adaptive voltage detection circuit include with
The battery voltage monitoring chip that the set of cells, set of cells control unit are connected, is characterized in that：The battery voltage monitoring
Chip is connected with the power supply of independent isolating.
Further, the circuit of each battery is provided with a voltage measurement end, and the battery voltage monitors chip
Low-voltage side be provided with several battery detection nodes, respectively battery detection node C1 is to battery detection node Cn, described
Battery detection node C1 is minimum voltage monitoring node, and the battery detection node C1 connects the power supply of the independent isolating, its
The remaining battery detection node is connected one to one with the voltage measurement end of battery each described successively.
Further, the power supply adopt voltage for 5V DC source.
Further, the working power that the power supply monitors chip with the battery voltage is altogether.
Further, the battery voltage monitoring chip adopts LTC6802 chips.
Further, the DC source carries out DC-DC by the outfan of the set of cells and is converted to.
Further, the permutator is conversion type, comprising the hilted broadsword pair being made up of a movable contact and two stationary contacts
Mechanical switch is thrown, the single-pole double throw mechanical switch includes normally closed and conversion two states.
The beneficial effects of the utility model have it is following some：
1. power-supply management system realizes the target of charge and discharge balancing in the way of relatively simple, is provided simultaneously with adapting to big work(
The advantage of rate use environment, high reliability；
2. system realization scheme has simple, the lower-cost advantage of control, and can preferably adapt to lithium battery list
The larger use condition of body state difference；
Even if 3. in the whole working cycle process of moving equilibrium, set of cells major loop is only left a small amount of battery, set of cells electricity
The power input voltage of pressure observation circuit can be with the normal work of holding circuit.
Description of the drawings
Fig. 1 is the circuit diagram that a kind of moving equilibrium adaptive voltage detects circuit described in this utility model embodiment；
In figure：1- batteries, 2- single-pole double throw mechanical switchs, 3- single-pole single-throw(SPST mechanical switchs, 4- permutatoies, 5- relays
Drive circuit, 6- set of cells control units, 7-CAN communication bus, 8- battery switch, 9- battery voltages monitoring chip, 10-
Power supply, 11- voltage measurements end, 12- high power relay drive circuits.
Specific embodiment
With reference to the accompanying drawings and examples this utility model is further described.
As shown in figure 1, a kind of moving equilibrium adaptive voltage detects circuit, in lithium battery management system, lithium
Each battery 1 (anode and cathode terminals) that battery power management system is included in the set of cells of series connection one conversion of parallel connection is opened
Close 4, the connection of permutator 4 can be monitored battery 1 and whether be put, superheat state sends respective drive signal in overcharging, cross
Set of cells control unit 6；Moving equilibrium adaptive voltage detection circuit includes what is be connected with set of cells, set of cells control unit 6
Battery voltage monitors chip 9, and battery voltage monitoring chip 9 is connected with the power supply 10 of independent isolating.
The circuit of each battery 1 is provided with a voltage measurement end 11, and battery voltage monitors the low-voltage side of chip 9
Several battery detection nodes, respectively battery detection node C1 to battery detection node Cn are provided with, battery detection node C1 is
Minimum voltage monitoring node, battery detection node C1 connect independent isolating power supply 10, remaining battery detection node successively with respectively
The voltage measurement end 11 of individual battery 1 connects one to one.
Set of cells control unit 6 monitors the state of battery 1, bag by with the communication of electric battery voltage monitoring chip 9
Include whether battery overcharges, crosses and put.
Power supply 10 adopts voltage for the DC source of 5V.The working power that power supply 10 monitors chip 9 with battery voltage is altogether
Ground.
Battery voltage monitoring chip 9 adopts LTC6802 chips, and the chip 9 of battery voltage monitoring in the present embodiment is adopted
With the LTC6802 chips of Linear Techn Inc. (Linear Technology Corporation).The DC source of power supply 10 by
The outfan of set of cells carries out DC-DC and is converted to, and the DC source of power supply 10 can also be obtained by outside input.
Permutator 4 is conversion type (permutator 4 adopts magnetic latching relay in the present embodiment), comprising dynamic by one
The single-pole double throw mechanical switch 2 that contact is constituted with two stationary contacts, single-pole double throw mechanical switch 2 include normally closed and two kinds of shapes of conversion
State.
In the present embodiment, set of cells is also connected one and connects the battery switch 8 of set of cells control unit 6, set of cells
High-power magnetic relay of the switch 8 using open type, comprising the single-pole single-throw(SPST being made up of a movable contact and a stationary contact
Mechanical switch 3, single-pole single-throw(SPST mechanical switch 3 include normally opened and closure two states.
Bistable structure of the magnetic latching relay of permutator 4 for multi-coil, keeps stationary contact to open comprising by magnetic force
The permanent magnet of conjunction state or the part with very high remanent magnetism prepare the armature of electromagnetic relay, and its contact folding condition is put down
When magnetic force by produced by permanent magnet or high remanent magnetism armature maintain；The movable contact of magnetic latching relay, stationary contact dot spacing
More than 1.3mm, representative value is 1.6mm；During closure, more than 500 gram forces, (bistable structure refers to disconnected in solenoid contact force
After electricity, permanent magnet or armature remain to the structure of position when hold-in winding is powered).The magnetic latching relay of permutator 4 has two
Stationary contact a, movable contact, has multiple coils, is a kind of " bistable relay ", it is also possible to regards one as and is driven by electric current
" single-pole double-throw switch (SPDT) ".The contact spacing of magnetic latching relay can reduce movement time when less, but easily produce contact
Electric arc.In the present embodiment, as the electric current for passing through is larger, the contact spacing of magnetic latching relay should be greater than 1.3mm to suppress
Contact electric arc.
The magnetic latching relay of each permutator 4 is by special relay drive circuit 5 and set of cells control unit 6
It is connected, set of cells control unit 6 can be sent accordingly to the magnetic latching relay of permutator 4 by relay drive circuit 5
Drive signal, adjust 4 state of permutator, tackle the abnormality that battery and set of cells occur.When set of cells control
Unit 6 detect some battery 1 in overcharging, crossing can be by the permutator 4 to the cell parallel when putting abnormality
Send drive signal, control permutator 4 single-pole double throw mechanical switch 2 change connection status, will appear from abnormal battery from
Serial array (set of cells) transfer is picked out, so as to protect the work safety of battery.
The high-power magnetic relay that battery switch 8 is adopted connects set of cells by high power relay drive circuit 12
Control unit 6 simultaneously obtains the drive signal that set of cells control unit 6 sends；When set of cells control unit 6 is detected at set of cells
Drive signal can be sent by the battery switch 8 connected to set of cells when the unusual conditions such as overcurrent overheat, control battery
Group switch 8 changes the connection status of single-pole single-throw(SPST mechanical switch 3, breaking circuit, so as to protect the work safety of set of cells.
Set of cells control unit 6 is provided with the CAN communication bus 7 connected with upper management unit, and set of cells control unit 6 is led to
Cross communication bus 7 to connect with upper management unit, transmit the status informations such as the voltage related to the battery in set of cells, temperature.
The signal driving power supply and set of cells control unit 6 of the magnetic latching relay of permutator 4 and battery switch 8
DC source can carry out DC-DC by set of cells outfan and be converted to, or come from outside input.
Finally, illustrate a kind of practical application of power supply management system for lithium battery pack provided by the utility model.
After set of cells charging starts, the single-pole double throw mechanical switch 2 of all permutatoies 4 is in normally off, by electricity
The all batteries 1 of Chi Zuzhong are together in series charging；When certain cell is full of, set of cells control unit 6 monitors the list
While body battery is full of signal, an order (drive signal) is sent, the permutator 4 corresponding with the cell is made
Single-pole double throw mechanical switch 2 jumps to transition status, and the fully charged cell is removed charge circuit, and other batteries continue
Charge.When there is cell to be full of again, this action is repeated in, until all batteries 1 are each filled with, set of cells control unit 6
Superior administrative unit sends status signal, disconnects the single-pole single-throw(SPST mechanical switch 3 of battery switch 8, stops charging；It is subsequently electric
6 output drive signal of pond group control unit makes all single-pole double throw mechanical switchs 2 reset (return to normally off), by set of cells
Each cell 1 be together in series, be that battery power discharge is ready.When hereafter detecting charge circuit disconnection, set of cells
Control unit 6 closes single-pole single-throw(SPST mechanical switch 3 to 8 output drive signal of battery switch, by set of cells UNICOM.
After battery power discharge starts, if set of cells control unit 6 detects certain cell in over-discharge state
When, that is, controlling the corresponding permutator 4 of the cell makes corresponding single-pole double throw mechanical switch 2 jump to transition status,
The cell of the over-discharge state is removed into discharge loop；This action is repeated in, until all battery discharges are finished or electricity
Pond group output voltage is less than setting value, and 6 superior administrative unit of set of cells control unit sends status signal, while output driving
Signal makes all single-pole double throw mechanical switchs 2 jump to transition status, stops electric discharge.When hereafter detecting discharge loop disconnection,
6 output drive signal of set of cells control unit makes all single-pole double throw mechanical switchs 2 return to normally off, will be each in set of cells
Individual cell is together in series, and is that set of cells charging is ready.
In charge and discharge process, the cell number of major loop can change, or even only remain last.Now by
The last battery detection node C1 of the low voltage side of the LTC6802 chips adopted in electric voltage observation circuit accesses power supply 10
(independent isolating 5V DC source) so that the power input voltage of LTC6802 chips can meet minimum voltage requirement substantially, because
And ensure that the normal work of electric voltage observation circuit.If set of cells control unit 6 finds voltage when only remaining a cell
Observation circuit operation irregularity, it will stop charge and discharge process and increase the cell number of major loop in order.
Device described in the utility model is not limited to the embodiment described in specific embodiment, those skilled in the art
Other embodiments are drawn according to the technical solution of the utility model, technological innovation scope of the present utility model is also belonged to.
Claims (7)
1. a kind of moving equilibrium adaptive voltage detects circuit, for lithium battery management system in, the lithium battery power supply
Management system is included in one permutator (4) of parallel connection of each battery (1) in the set of cells of series connection, the permutator
(4) whether connection can monitor the battery (1) and put, superheat state send the battery of respective drive signal in overcharging, cross
Group control unit (6)；The moving equilibrium adaptive voltage detection circuit includes and the set of cells, set of cells control unit
(6) connected battery voltage monitoring chip (9), is characterized in that：Battery voltage monitoring chip (9) be connected with it is independent every
From power supply (10).
2. moving equilibrium adaptive voltage as claimed in claim 1 detects circuit, it is characterized in that：Each battery (1)
Circuit is provided with a voltage measurement end (11), and the low-voltage side of battery voltage monitoring chip (9) is provided with several
, to battery detection node Cn, the battery detection node C1 is minimum electricity for battery detection node, respectively battery detection node C1
Pressure monitoring node, the battery detection node C1 connect the power supply (10) of the independent isolating, remaining described battery detection node
Connect one to one with the voltage measurement end (11) of battery each described (1) successively.
3. moving equilibrium adaptive voltage as claimed in claim 2 detects circuit, it is characterized in that：The power supply (10) is using electricity
Press the DC source for 5V.
4. moving equilibrium adaptive voltage as claimed in claim 3 detects circuit, it is characterized in that：The power supply (10) with it is described
The working power of battery voltage monitoring chip (9) is altogether.
5. moving equilibrium adaptive voltage as claimed in claim 4 detects circuit, it is characterized in that：The battery voltage monitoring
Chip (9) is using LTC6802 chips.
6. moving equilibrium adaptive voltage as claimed in claim 3 detects circuit, it is characterized in that：The DC source is by described
The outfan of set of cells carries out DC-DC and is converted to.
7. moving equilibrium adaptive voltage as claimed in claim 1 detects circuit, it is characterized in that：The permutator (4) is
Conversion type, comprising the single-pole double throw mechanical switch (2) being made up of a movable contact and two stationary contacts, the single-pole double throw machinery
Switch (2) includes normally closed and conversion two states.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620958175.8U CN206099397U (en) | 2016-08-26 | 2016-08-26 | Moving equilibrium self -adaptation voltage detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620958175.8U CN206099397U (en) | 2016-08-26 | 2016-08-26 | Moving equilibrium self -adaptation voltage detection circuit |
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| Publication Number | Publication Date |
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| CN206099397U true CN206099397U (en) | 2017-04-12 |
Family
ID=58473200
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620958175.8U Expired - Fee Related CN206099397U (en) | 2016-08-26 | 2016-08-26 | Moving equilibrium self -adaptation voltage detection circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106908739A (en) * | 2017-04-18 | 2017-06-30 | 武汉理工大学 | A kind of power cell of vehicle condition detecting system |
| CN110492555A (en) * | 2019-07-25 | 2019-11-22 | 宿州市艾尔新能源有限公司 | A kind of equal balance system and its control method of high capacity cell |
| CN113328501A (en) * | 2021-06-30 | 2021-08-31 | 港华能源投资有限公司 | Flexible connecting device and framework for direct-current screen battery module of energy station |
-
2016
- 2016-08-26 CN CN201620958175.8U patent/CN206099397U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106908739A (en) * | 2017-04-18 | 2017-06-30 | 武汉理工大学 | A kind of power cell of vehicle condition detecting system |
| CN110492555A (en) * | 2019-07-25 | 2019-11-22 | 宿州市艾尔新能源有限公司 | A kind of equal balance system and its control method of high capacity cell |
| CN113328501A (en) * | 2021-06-30 | 2021-08-31 | 港华能源投资有限公司 | Flexible connecting device and framework for direct-current screen battery module of energy station |
| CN113328501B (en) * | 2021-06-30 | 2023-09-19 | 港华能源投资有限公司 | Flexible connection device and framework of energy station direct current screen battery module |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170412 Termination date: 20170826 |
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| CF01 | Termination of patent right due to non-payment of annual fee |