CN206389125U - A kind of lithium battery source module management system - Google Patents
A kind of lithium battery source module management system Download PDFInfo
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- CN206389125U CN206389125U CN201620659275.0U CN201620659275U CN206389125U CN 206389125 U CN206389125 U CN 206389125U CN 201620659275 U CN201620659275 U CN 201620659275U CN 206389125 U CN206389125 U CN 206389125U
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- battery pack
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Abstract
The utility model belongs to lithium battery charge and discharge protective technical field; specifically related to a kind of lithium battery source module management system; power module for managing lithium battery composition; power module is made up of several battery packs; battery pack is in series by several cell pieces; cell piece is made up of a battery cell or multiple battery cells in parallel; cell piece one the first change-over switch of parallel connection; the first change-over switch in each battery pack constitutes a switch arrays, switch arrays connection battery pack control unit；Also include the power module administrative unit being connected with battery pack control unit, the charger being connected with power module administrative unit；Wherein the first change-over switch is conversion hysteria, using magnetic latching relay.Lithium battery source module management system provided by the utility model realizes charging and discharging lithium battery target in a balanced way in relatively simple mode, is provided simultaneously with adapting to high-power use environment, the advantage of high reliability.With simple, the lower-cost advantage of control.
Description
Technical field
The utility model belongs to lithium battery charge and discharge protective technical field, and in particular to a kind of lithium battery source module management
System.
Background technology
At present, electric automobile causes the attention of increasing country with the advantage of its unique energy-conserving and environment-protective, carries out
Substantial amounts of correlative study and development.Small volume that wherein dynamic lithium battery power supply possesses with it, light weight, energy density
Greatly, memory-less effect, service life length, using scope is wide, operating voltage is high and the low advantage of self-discharge rate and as main flow electricity
Power source technology.
Normally, dynamic lithium battery is used in series in groups, it is multigroup between connect again and in parallel form battery bag.Battery pack is filled
If there is a battery charging voltage to reach setting value (such as 4.2V) when electric, that is, cut off charge circuit to avoid overcharge.But by
The problem of there is uniformity between battery, causes the appearance of " wooden pail effect ", i.e., battery pack total electricity is by some cell
One cell can only be full of by limitation, charging, and whole battery pack is discontented with so that battery power discharge capacity diminishes.Equally, it is electric
If pond group has monomer to reach that setting value need to cut off discharge loop to avoid overdischarge when discharging, battery power discharge is further reduced
Capacity.
Attempt to improve this problem using some charge and discharge balancing technologies for this people.Including using bypass resistance
Passive type it is balanced, using compensating electric capacity it is active it is balanced, using the related skill such as active equilibrium of master-slave mode inductance coil
Art.Current balancing technique is all based on shunting principle, most for deviateing on the premise of the performance loop of battery is not turned off
Interval cell either carries out shunting Reduction of Students' Study Load or carries out supplement of confluxing.It, which has problem, is powerful shunting, confluxes
Effect is difficult to realize, and still needs to continuous firing when cell is in overcharge, overdischarge, once Balance route measure
With it is not good when can accelerate cell degradation；Simultaneously also can not be simply with new battery replacement used batteries.
On the other hand, when lithium battery is in use because the reason appearance such as some cell inside micro-short circuit are potential
During failure, existing balancing technique can cover this problem to a great extent；And when failure substantially occur after existing battery
Management system can only be selected battery supply loop fast shut-off to avoid failure from causing damage while sending warning signal,
So as to also cause automobile loses power can not travel.
Utility model content
The problem of being brought for the battery consistency difference for overcoming current driving force lithium battery power supply to exist, the utility model
Purpose be to provide a kind of lithium battery source module management system, the device can be realized in relatively simple, economic mode
The protection for overcharging, putting abnormality excessively of battery cell, so as to improve the use capacity of battery pack and extend the use of battery pack
Life-span, and damage battery can be removed from major loop when incipient fault occurs in battery, allow remaining battery to continue to provide
Electric power, improves the reliability of battery system.Its principle is using cutout method in a balanced way, i.e., to each cell parallel one
Single-pole double-throw switch (SPDT) (mechanical contact or electronic power parts), i.e. change-over switch will when overcharge, overdischarge occurs in battery
Battery individually bypasses disconnection, it is to avoid battery is excessively used, while mitigating the influence of wooden pail effect, is convenient for changing new battery.
To achieve the above objectives, the technical solution adopted in the utility model is a kind of lithium battery source module management system,
Power module for managing lithium battery composition, the power module is made up of several battery packs, and the battery pack is by some
Individual cell piece is in series, and the cell piece is made up of a battery cell or multiple battery cells in parallel, the cell piece
First change-over switch in first change-over switch in parallel, each battery pack constitutes a switch arrays, described
Switch arrays connect battery pack control unit；Also include the power module administrative unit being connected with the battery pack control unit,
The charger being connected with the power module administrative unit；Wherein, first change-over switch be conversion hysteria, using magnetic keep after
Electrical equipment.
Further, the power module administrative unit includes being connected with current sensor, cut-out relay, limiting protector
The first CPU, the first CAN communication bus, the second CAN communication bus, the 3rd CAN communication being arranged on the first CPU be total
Line, the first CAN communication bus connect the battery pack control unit, the second CAN communication bus connection superior system,
The 3rd CAN communication bus connection is depressured the described of charge mode with trickle charge pattern, constant current charging mode, current limliting and filled
Motor；Second CAN, the 3rd CAN communication bus are arranged on the first CPU by the first photoisolator respectively
On.
Further, the battery pack control unit includes with the first CAN communication bus being connected by the second photoisolator
The 2nd CPU, the Voltage measure for connecting the 2nd CPU and the switch arrays, connection the 2nd CPU TEMP
Device, in addition to current measurer, switch arrays driver；First change-over switch is included by a movable contact and two stationary contacts
Point is constituted including " normally closed " and " conversion " two states single-pole double throw mechanical switch, the institute of each first change-over switch
Magnetic latching relay is stated to connect the battery pack control unit by special relay drive circuit and obtain the battery
The drive signal that group control unit is sent.
Further, the limiting protector includes the charging current limiter resistance and electric discharge current-limiting resistance of series connection, the charging limit
Leakage resistance, electric discharge current-limiting resistance difference second change-over switch in parallel, second change-over switch is conversion hysteria, is protected using magnetic
Relay is held, it is double comprising being made up of a movable contact and two stationary contacts including " normally closed " and " conversion " two states hilted broadsword
Mechanical switch is thrown, the magnetic latching relay of each second change-over switch is connected by special relay drive circuit
Meet the first CPU.
Further, the magnetic latching relay is the bistable structure of multi-coil, is moved comprising keeping described by magnetic force
Contact, the permanent magnet of stationary contact folding condition or high remanent magnetism armature；It is the movable contact of the magnetic latching relay, quiet
Contact spacing is more than 1.3mm.
Further, the DC supply of the power module administrative unit and the battery pack control unit passes through described
The DC-DC of the output end of power module is changed and obtained.
The beneficial effects of the utility model are：
1. realizing charging and discharging lithium battery target in a balanced way in relatively simple mode, it is provided simultaneously with adapting to high-power use
The advantage of environment, high reliability.
2. with controlling simple, lower-cost advantage, and can preferably adapt to lithium battery free state difference compared with
Big use condition.
3. can implement to control to cell piece monomer, the unusual condition of some cell piece monomer can not influence battery pack
Normal work, improves the functional reliability of lithium battery power supply.
Brief description of the drawings
Fig. 1 is the schematic diagram of lithium battery source module management system described in the utility model embodiment；
Fig. 2 is that the annexation of switch arrays described in the utility model embodiment and the cell piece is illustrated
Figure；
Fig. 3 is the schematic diagram of limiting protector described in the utility model embodiment；
In figure：1- the first CPU, 2- cut-out relays, 3- current sensors, 4- limiting protectors, the CAN communications of 5- first are total
Line, 6- the second CAN communication buses, the CAN communication buses of 7- the 3rd, 8- chargers, 9- superior systems, 10- the 2nd CPU, 11- voltages
Measuring appliance, 12- temperature sensors, 13- switch arrays, 14- battery packs, 15- cell pieces, 16- magnetic latching relays, 17- hilted broadswords
Double-throw mechanical switch, 18- relay drive circuits, the photoisolators of 19- second, the photoisolators of 20- first, 21- charging limits
Leakage resistance, 22- electric discharge current-limiting resistances.
Embodiment
The utility model is further described with reference to the accompanying drawings and examples.
As shown in figure 1, a kind of lithium battery source module management system that the utility model is provided, for managing lithium battery structure
Into power module, power module is made up of several battery packs 14, and battery pack 14 is in series by several cell pieces 15, electricity
Pond piece 15 is made up of a battery cell or multiple battery cells in parallel, first change-over switch in parallel of cell piece 15, often
The first change-over switch in individual battery pack 14 constitutes a switch arrays 13, the connection battery pack control unit of switch arrays 13, electricity
Pond group control unit can monitor the state parameter of the charge and discharge state of cell piece 15 and send respective drive signal controlling switch battle array
The first change-over switch change state in row 13 makes corresponding cell piece 15 remove charge and discharge loop, and (charge and discharge state includes " mistake
Fill ", " cross put ", " overheat " state)；Also include the power module administrative unit being connected with battery pack control unit, with power supply mould
The charger 8 of block administrative unit connection, the state parameter that power module administrative unit is sent according to battery pack control unit is produced
Command adapted thereto, control charger 8 adjusts the charge mode and charging current to power module.
Power module administrative unit includes being connected with current sensor 3, cut-out relay 2, limiting protector 4 and first
First CPU1 of photoisolator 20, is arranged on the first CAN communication bus 5 on the first CPU1, the second CAN communication bus 6,
Three CAN communication buses 7, wherein, the 2nd CAN buses 6, the 3rd CAN communication bus 7 are set by the first photoisolator 20 respectively
Put on the first CPU.First CAN communication bus 5 connection battery pack control unit, the second CAN communication bus 6 connection superior system
9th, the 3rd CAN communication bus 7 connection charger 8；
The charge mode of charger 8 includes trickle charge pattern, constant current charging mode, current limliting decompression charge mode.
Battery pack control unit includes second be connected by the second photoisolator 19 with the first CAN communication bus 5
CPU10, the 2nd CPU10 of connection and switch arrays 13 Voltage measure 11, the temperature sensor 12 for connecting the 2nd CPU10, also
Including current measurer, switch arrays driver (not marked in figure).
As shown in Fig. 2 the first change-over switch is conversion hysteria, using magnetic latching relay 16, comprising by a movable contact with
The single-pole double throw mechanical switch 17 that two stationary contacts are constituted, the single-pole double throw mechanical switch 17 of the first change-over switch includes " normally closed "
" conversion " two states, the magnetic latching relay 16 of each first change-over switch passes through special relay drive circuit 18
Connection battery pack control unit simultaneously obtains the drive signal that battery pack control unit is sent.
As shown in figure 3, limiting protector 4 includes the charging current limiter resistance 21 and electric discharge current-limiting resistance 22 of series connection；Charging limit
Leakage resistance 21, the electric discharge difference of current-limiting resistance 22 second change-over switch in parallel, the second change-over switch are similarly conversion hysteria, equally
It is same comprising the single-pole double throw mechanical switch 17 being made up of a movable contact and two stationary contacts using magnetic latching relay 16,
Single-pole double throw mechanical switch 17 in second change-over switch also includes " normally closed " and " conversion " two states, and each second conversion is opened
The magnetic latching relay 16 of pass connects the first CPU1 by special relay drive circuit 18, in the first CPU1 control
Under, charging current limiter resistance 21, which can be placed into or remove charge circuit, electric discharge current-limiting resistance 22, can be placed into or remove electric discharge
Loop.(charging current limiter resistance 21, electric discharge current-limiting resistance 22 can not be put into charge and discharge loop simultaneously.)
The magnetic latching relay 16 of first change-over switch and the second change-over switch is the bistable structure of multi-coil, comprising logical
Crossing magnetic force keeps movable contact, the permanent magnet of stationary contact folding condition or the part with very high remanent magnetism to prepare electromagnetism relay
The armature of device, its contact folding condition is usually maintained as the magnetic force produced by permanent magnet or high remanent magnetism armature；Magnetic is kept
The movable contact of relay 16, stationary contact spacing are more than 1.3mm, and representative value is 1.6mm；Contact force is more than 500 gram forces during closure
(bistable structure refers to remain to the structure of position when hold-in winding is powered in permanent magnet or armature after magnet coil is powered off).Magnetic
The contact spacing of guard relay 16 can reduce actuation time when smaller, but easily produce contact electric arc.In the present embodiment,
Because the electric current passed through is larger, the contact spacing of magnetic latching relay 16 should be greater than 1.3mm to suppress contact electric arc.
The output end that the DC supply of power module administrative unit and battery pack control unit passes through power module
DC-DC is changed and obtained.
The utility model additionally provides a kind of lithium battery source module pipe of above-mentioned lithium battery source module management system
Reason method, comprises the following steps：
On step S1, charger 8 after electricity, data are sent to power module administrative unit, shows that charger 8 is added and charges back
Road, charger 8 is idle condition.
Step S2, power module administrative unit is sentenced according to each actual conditions of cell piece 15 in the battery pack 14 of battery module
Disconnected whether to start charger 8 and charged, if "No", charger 8 would not allow for charging, and charger 8 is idle condition, such as
Fruit "Yes", then control charger 8 to start charging.
Step S3, when the battery pack 14 of battery module is charged, the first change-over switch is in normally off, when a certain
When cell piece 15 is in overcharging state, battery pack control unit monitors that the cell piece 15 overcharges signal, is simultaneously emitted by a finger
Order, makes corresponding first change-over switch jump to transition status, the cell piece 15 that this is overcharged is removed into charge circuit, is repeated in
Operate above, until all cell pieces 15 in the battery pack 14 of battery module all remove charge circuits；
In addition specific control power module administrative unit to the operational mode of charger 8, electricity are also included in step s3
Source module administrative unit, according to the principle of " safety first, the life-span is preferential ", is examined immediately according to the state parameter of each cell piece 15
Survey in battery pack whether the cell piece in need for changing charging current, selection trickle charge pattern, constant current charging mode, current limliting drop
Press one kind in charge mode.Particular content is as follows：
Battery pack control unit sends the state parameter of cell piece 15 to power module administrative unit, and power module management is single
The state parameter for the cell piece 15 that member is sent according to battery pack control unit checks for the electricity for needing to change charging current
Pond piece；
If there is voltage be less than minimum allowable cell piece charging voltage cell piece, power module administrative unit control to
Charger 8 sends command adapted thereto charger 8 and enters trickle charge pattern, and charging voltage and electric current are in lower value, when the electricity
Pond piece recovers to exit trickle charge pattern during normal voltage range；
If there is no the cell piece of change charging current is needed, start to charge normal, the control of power module administrative unit
Charger 8 enters constant current charging mode, and power module administrative unit can provide maximum allowable charging battery module voltage, maximum and permit
Perhaps cell piece charging voltage, maximum allowable charging current, battery module terminal voltage, highest cell piece voltage are as filling
Electric restrictive condition, is charged；
If there is voltage be higher than maximum allowable cell piece charging voltage cell piece when (namely highest monomer electricity
When pond piece voltage reaches maximum allowable cell piece charging voltage), power module administrative unit is by controlling corresponding battery
The cell piece is removed charge circuit by group control unit, to ensure that the voltage of remaining cell piece does not transfinite, while controlling charging
Machine 8 enters current limliting and is depressured charge mode, and staged reduction (charger) charging voltage removes battery from charge circuit every time
Decline (charger) charging voltage according to preset value during piece, subsequent power module administrative unit passes through battery pack control unit
The cell piece that constantly will be filled with electricity removes charge circuit, until the minimum voltage of remaining power piece and maximum allowable cell piece
When the deviation of charging voltage is less than predetermined value, charger 8 is shut down, and stops charging；
Also include in step s3, when charger 8 in charging process in abnormal protection, reset itself, forbid charging
When, charger 8 switchs to idle condition, when charger 8 finds the communication abnormality between power module administrative unit,
Stop charging；
Also include in step s3, when control failure occurs in the charger 8, or charger 8 is non-supporting special
Charger 8, and power module administrative unit is when finding that charging voltage and electric current are mismatched with current charge mode, charger 8
Failure Control strategy it is as follows：
1) power module administrative unit will send adjust instruction to charger 8；
2) when charger 8 is without correct response in the specified time, power module administrative unit calculates the electricity of each battery pack 14
Amount, if each battery pack 14 is close to full state, superior system 9 sends caution signal and passes through cut-out relay 2 simultaneously
Disconnect charge circuit；
If 3) the not enough power supply of each battery pack 14, and charging current be more than preset value when, power module administrative unit hair
Caution signal is sent while the second corresponding change-over switch of the charging current limiter resistance 21 in limiting protector 4 is changed into conversion shape
State, charge circuit is accessed by charging current limiter resistance 21；
4) disconnected and charged by cut-out relay 2 after charging complete, by the phase of charging current limiter resistance 21 in limiting protector 4
Corresponding second change-over switch changes into normally off, and charging current limiter resistance 21 is removed into charge circuit.
Step S4, all the first change-over switch jumps to normally off to the control of battery pack control unit, prepares electric discharge.
Step S5, when the battery pack 14 of battery module is discharged, the first change-over switch is in normally off, when a certain
Cell piece 15 was in when putting state, and battery pack control unit monitors that the cell piece 15 crosses discharge signal, was simultaneously emitted by a finger
Order, makes corresponding first change-over switch jump to transition status, this is crossed to the cell piece 15 put and removes discharge loop, is repeated in
Operate above, until all cell pieces 15 in the battery pack 14 of battery module all remove discharge loops；In step s 5 also
Including in the battery module discharge process, if the dump energy of battery pack 14 is less than preset value, and discharge current is more than default
(namely battery pack dump energy is few, and battery pack when being worth or cause the voltage decrease speed of battery pack 14 more than preset value
When voltage declines very fast), power module administrative unit superior system 9 sends caution signal, if situation is still in setting time
When not improving, the second corresponding change-over switch of the electric discharge current-limiting resistance 22 in limiting protector 4 is changed into transition status, will
Discharge the access discharge loop of current-limiting resistance 22, reduces discharge current to avoid lithium battery overdischarge.
Step S6, all the first change-over switch jumps to normally off to the control of battery pack control unit, prepares charging.
Walked in step S1 into step S6, power module administrative unit finds some cell piece 15 due to internal micro-short circuit etc.
Reason is when there is incipient fault (such as when overheating), and superior system 9 sends caution signal, is determined according to the feedback of superior system 9
Fixed processing strategy, or the cell piece 15 is removed into charge and discharge loop to the battery pack control unit transmission instruction accordingly.
Device described in the utility model is not limited to the embodiment described in 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 (3)
1. a kind of lithium battery source module management system, the power module for managing lithium battery composition, the power module by
Several battery packs (14) are constituted, and the battery pack (14) is in series by several cell pieces (15), the cell piece (15)
It is made up of a battery cell or multiple battery cells in parallel, the cell piece (15) first change-over switch in parallel, often
First change-over switch in the individual battery pack (14) constitutes a switch arrays (13), switch arrays (13) connection
Battery pack control unit；Also include the power module administrative unit being connected with the battery pack control unit, with the power supply mould
The charger (8) of block administrative unit connection；It is characterized in that：First change-over switch is conversion hysteria, using magnetic latching relay
(16)；
The power module administrative unit includes being connected with current sensor (3), cut-out relay (2), limiting protector (4)
First CPU (1), is arranged on the first CAN communication bus (5) on the first CPU (1), the second CAN communication bus (6), the 3rd
CAN communication bus (7), it is total that the first CAN communication bus (5) connects the battery pack control unit, second CAN communication
Line (6) connection superior system (9), the 3rd CAN communication bus (7) connection with trickle charge pattern, constant current charging mode,
Current limliting is depressured the charger (8) of charge mode；Second CAN (6), the 3rd CAN communication bus (7) pass through respectively
First photoisolator (20) is arranged on the first CPU (1)；
The battery pack control unit includes the be connected by the second photoisolator (19) with the first CAN communication bus (5)
Two CPU (10), Voltage measure (11), the connection described second for connecting the 2nd CPU (10) and the switch arrays (13)
CPU (10) temperature sensor (12), in addition to current measurer, switch arrays driver；First change-over switch is included
Be made up of a movable contact and two stationary contacts including " normally closed " and " conversion " two states single-pole double throw mechanical switch
(17), the magnetic latching relay (16) of each first change-over switch passes through special relay drive circuit (18)
Connect the battery pack control unit and obtain the drive signal that the battery pack control unit is sent；
The magnetic latching relay (16) is the bistable structure of multi-coil, comprising keeping the movable contact, stationary contact by magnetic force
The permanent magnet or high remanent magnetism armature of point folding condition；The movable contact, the stationary contact of the magnetic latching relay (16)
Spacing is more than 1.3mm.
2. lithium battery source module management system as claimed in claim 1, it is characterized in that：The limiting protector (4) includes
The charging current limiter resistance (21) and electric discharge current-limiting resistance (22) of series connection, the charging current limiter resistance (21), electric discharge current-limiting resistance
(22) difference second change-over switch in parallel, second change-over switch is conversion hysteria, using magnetic latching relay (16), bag
Containing be made up of a movable contact and two stationary contacts including " normally closed " and " conversion " two states single-pole double throw mechanical switch
(17), the magnetic latching relay (16) of each second change-over switch passes through special relay drive circuit (18)
Connect the first CPU (1).
3. the lithium battery source module management system as described in any one of claim 1 or 2, it is characterized in that：The power module
The DC-DC conversions for the output end that the DC supply of administrative unit and the battery pack control unit passes through the power module
And obtain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620659275.0U CN206389125U (en) | 2016-06-28 | 2016-06-28 | A kind of lithium battery source module management system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620659275.0U CN206389125U (en) | 2016-06-28 | 2016-06-28 | A kind of lithium battery source module management system |
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| Publication Number | Publication Date |
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| CN206389125U true CN206389125U (en) | 2017-08-08 |
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ID=59487488
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107910914A (en) * | 2017-11-24 | 2018-04-13 | 南京工程学院 | The load distribution method in parallel applied between lithium battery group in power-supply system |
| CN109921490A (en) * | 2019-03-27 | 2019-06-21 | 西安科技大学 | A kind of lithium battery Pressure and Control system and the control method based on the system |
| CN115173499A (en) * | 2022-05-31 | 2022-10-11 | 深圳市玺悦能源科技有限公司 | Battery pack charging and discharging control system and method |
-
2016
- 2016-06-28 CN CN201620659275.0U patent/CN206389125U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107910914A (en) * | 2017-11-24 | 2018-04-13 | 南京工程学院 | The load distribution method in parallel applied between lithium battery group in power-supply system |
| CN107910914B (en) * | 2017-11-24 | 2021-01-29 | 南京工程学院 | Load distribution method for parallel application lithium battery pack in power supply system |
| CN109921490A (en) * | 2019-03-27 | 2019-06-21 | 西安科技大学 | A kind of lithium battery Pressure and Control system and the control method based on the system |
| CN115173499A (en) * | 2022-05-31 | 2022-10-11 | 深圳市玺悦能源科技有限公司 | Battery pack charging and discharging control system and method |
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