CN209462059U - A kind of lithium battery protection board for realizing battery pack active equalization based on super capacitor - Google Patents
A kind of lithium battery protection board for realizing battery pack active equalization based on super capacitor Download PDFInfo
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- CN209462059U CN209462059U CN201920479589.6U CN201920479589U CN209462059U CN 209462059 U CN209462059 U CN 209462059U CN 201920479589 U CN201920479589 U CN 201920479589U CN 209462059 U CN209462059 U CN 209462059U
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Abstract
The utility model relates to technical field of battery management, disclose a kind of lithium battery protection board that battery pack active equalization is realized based on super capacitor.It is created by the utility model, on the one hand it can use super capacitor as electricity temporary storage medium, and high-voltage lithium is first chosen to carry out constant-current charge to super capacitor, low-voltage lithium battery is chosen to receive the constant-current discharge from super capacitor again, to realize battery pack active equalization purpose, both can guarantee each shifting savings all is to take high benefit low, avoid invalid charge and discharge cycles, so that being had little effect to battery life, it can also guarantee the constant of euqalizing current using DC-DC constant current charge-discharge technology, so that the ability of equalization will not be influenced because the pressure difference between battery is smaller；On the other hand the emergency cases such as whether lithium battery group overcharges, over-discharge or overcurrent can also be judged, if then realizing the external protection purpose to lithium battery group in time according to the collection result from battery voltage acquisition unit and current acquisition unit.
Description
Technical field
The utility model belongs to technical field of battery management, and in particular to one kind realizes battery pack actively based on super capacitor
Balanced lithium battery protection board.
Background technique
In such as electric car, tour bus, battery-operated motor cycle, solar energy storage, base station energy storage and high power UPS power supply
It is battery balanced to be in the battery management systems in fields such as (Uninterruptible Power System, i.e. uninterruptible power supply)
Refer to and utilize power electronic technique, is maintained at single rechargeable battery voltage or battery voltage deviation in expected range, thus
Guarantee that each single battery keeps same state in normal use, to avoid overcharging or the generation of over-discharge.Battery balanced one
As be divided into active equalization and two kinds passive balanced.The existing lithium battery protection board for realizing active equalization mainly includes: condenser type
Active equalization protection board, inductance type active equalization protection board and transformer type active equalization protection board, but these three are actively equal
Weighing apparatus protection board due to portfolio effect is poor, equalization efficiency is low and the factors such as expensive cause on the market user volume it is lower, specifically
As described below.
(1) realize passive balanced lithium battery protection board: passive equilibrium generally by way of conductive discharge, to voltage compared with
High battery discharges, and discharges electricity with form of heat, strives for more charging time for other batteries.Whole system in this way
Electricity is limited by the least battery of capacity.Passive balanced advantage is at low cost and circuit design is simple；And it is with most that disadvantage, which is,
It carries out balanced on the basis of low battery remaining surplus, can not increase the capacity of the few battery of residual, balanced electricity 100% is with form of heat
It is wasted, and equilibrium can only be carried out while charging.
(2) condenser type active equalization protection board: it, which is adjacent cell, carries out electricity transfer by capacitor, before this high voltage
Battery discharge supplies electricity to adjacent low-voltage battery charging to capacitor charging, then electricity consumption receiving, to reach balanced purpose, the disadvantage is that
Weighing apparatus ability depends on the voltage difference between 2 batteries, and pressure difference is bigger, and the ability of equalization is bigger, and the smaller ability of equalization of pressure difference is smaller, and
The pressure difference of most of each batteries of battery pack nearly all only has tens millivolts, and the ability of equalization cannot be embodied.Another question
It is first battery and the last one battery if battery difference not instead of 2 adjacent batteries, since condenser type is balanced only
Can balanced adjacent battery, to complete first and just need all batteries to be involved in electricity to connect to the balanced of a last battery
Stick transfer, causes whole group inside battery all doing invalid charge and discharge, influences the service life of battery pack.
(3) inductance type active equalization protection board: its scheme balanced with condenser type is similar, is all by adjacent 2 electricity
Electricity transfer is being done in pond, and only the electric current of inductance type equilibrium can be made larger, but it is balanced equally all to there is magnitude of pressure differential influence
Electricity, at the same influence battery pack service life be also it is unavoidable, kwh loss is larger, although the efficiency of synchronous rectification can be with
Accomplish close to 95%, but need n times electricity to shift from the equilibrium of first battery to n-th battery, that is, 0.95 n times
Square efficiency, under efficiency is very low.
(4) transformer type active equalization protection board: its advantage is that directly from whole group battery electricity-taking to the battery of minimum voltage
Charging, pressure difference is not influenced the ability of equalization between by battery, the disadvantage is that transformer is electromagnetic switching device, there are certain leakage field,
Efficiency generally will not be too high.Second the disadvantage is that if there is 2 or more A-batteries, with regard to needs pair in whole group battery
All A-batteries all carry out charging successively, but electricity source is to carry out taking electricity from whole group battery, then being exactly original occur
Originally it all to charge to 1, No. 2 battery, but when charging to No. 1 battery actually since electricity source is whole group battery,
So No. 2 batteries are also just removed electricity at this time.Equally when No. 1 battery charging complete charges to No. 2 batteries, it is also desirable to 1
Number battery is also removed electricity.It has so resulted in a part of invalid electricity to move, has increased the inefficient cycle of battery, influenced
Whole group battery life.
Utility model content
It is low in order to solve portfolio effect difference present in the existing lithium battery protection board for realizing active equalization and equalization efficiency
The problems such as, the utility model aim is to provide a kind of li-ion cell protection for realizing battery pack active equalization based on super capacitor
Plate.
The technology employed by the present utility model is
A kind of lithium battery protection board for realizing battery pack active equalization based on super capacitor, including circuit board, in the electricity
Battery voltage acquisition unit, the first battery gating matrix, control unit, bi-directional DC-DC constant current charge-discharge list are disposed on the plate of road
Member, super capacitor, current acquisition unit and general supply electric-controlled switch, wherein the battery voltage acquisition unit is for obtaining lithium
The positive and negative interpolar voltage value of each serial lithium battery in battery pack, the first battery gating matrix include that n+1 battery connects
End and anode/cathode for being electrically connected each serial lithium battery in the lithium battery group correspondingly respectively are connect, and is used for
Make any one serial lithium battery in the lithium battery group can the individually bi-directional DC-DC constant current charge-discharge unit in parallel
First anode connection terminal and the first cathode connecting pin, n are the natural number not less than 3；
The output end of the battery voltage acquisition unit is electrically connected described control unit, and described control unit is also electrically connected respectively
Connect the gating control terminal of the first battery gating matrix and the charge and discharge switching of the bi-directional DC-DC constant current charge-discharge unit
End, the second anode connection terminal of the bi-directional DC-DC constant current charge-discharge unit is electrically connected the anode of the super capacitor, described double
The cathode of the super capacitor is electrically connected to the second cathode connecting pin of DC-DC constant current charge-discharge unit；
The current input terminal of the current acquisition unit is used to be electrically connected the general supply anode of the lithium battery group, the electricity
The current output terminal of stream acquisition unit is electrically connected one end of the general supply electric-controlled switch, the general supply electric-controlled switch it is another
The positive pole for being electrically connected electrical appliance is held, the acquisition signal output end of the current acquisition unit and the general supply are automatically controlled
The controlled end of switch is electrically connected described control unit.
Optimization, the battery voltage acquisition unit includes the second battery gating matrix and analog to digital conversion circuit, wherein
The second battery gating matrix also includes n+1 battery terminal connections and is used to be electrically connected the lithium electricity correspondingly respectively
Anode/cathode of each serial lithium battery in the group of pond, and for making any one serial lithium battery in the lithium battery group can
The individually electrode input end and negative input of analog-digital conversion circuit as described in parallel；
The gating control terminal of the second battery gating matrix is electrically connected described control unit, analog-digital conversion circuit as described
Output end of the output end as the battery voltage acquisition unit.
It advanced optimizes, the second battery gating matrix includes that the 3rd n selects 1 multiple selector and the 4th n to select more than 1
Road selector, wherein the 3rd n selects n input terminal of 1 multiple selector as the battery of second battery gating matrix
Connecting pin is used to be electrically connected the anode of each serial lithium battery in the lithium battery group correspondingly respectively, and the 3rd n selects 1
The electrode input end of the output end electrical connection analog-digital conversion circuit as described of multiple selector, the 4th n select 1 multiple selector
N input terminal is electric for being electrically connected the lithium correspondingly respectively as the battery terminal connections of second battery gating matrix
The cathode of each serial lithium battery in the group of pond, the 4th n select the output end of 1 multiple selector to be electrically connected the analog-to-digital conversion electricity
The negative input on road；
Described control unit be also electrically connected the 3rd n select 1 multiple selector gating control terminal and the 4th n
Select the gating control terminal of 1 multiple selector.
Specifically, the n+1 battery terminal connections in second battery gating matrix are in series with the second electric-controlled switch respectively,
Wherein, the controlled end of second electric-controlled switch is electrically connected described control unit.
Optimization, the first battery gating matrix includes that the first n selects 1 multiple selector and the 2nd n to select 1 multi-path choice
Device, wherein the first n selects n input terminal of 1 multiple selector as the battery terminal connections of first battery gating matrix
For being electrically connected the anode of each serial lithium battery in the lithium battery group correspondingly respectively, the first n selects 1 multichannel to select
The output end for selecting device is electrically connected the first anode connection terminal of the bi-directional DC-DC constant current charge-discharge unit, and the 2nd n is selected more than 1
N input terminal of road selector is used to be electrically connected correspondingly respectively as the battery terminal connections of first battery gating matrix
The cathode of each serial lithium battery in the lithium battery group is connect, the 2nd n is selected described in the output end electrical connection of 1 multiple selector
First cathode connecting pin of bi-directional DC-DC constant current charge-discharge unit；
Described control unit be also electrically connected the first n select 1 multiple selector gating control terminal and the 2nd n
Select the gating control terminal of 1 multiple selector.
Specifically, the n+1 battery terminal connections in first battery gating matrix are in series with the first electric-controlled switch respectively,
Wherein, the controlled end of first electric-controlled switch is electrically connected described control unit.
Optimization, the bi-directional DC-DC constant current charge-discharge unit includes constant-current decompression circuit, constant current boost circuit, the
Three electric-controlled switch and the 4th electric-controlled switch；
The output end of the input terminal of the constant-current decompression circuit and the constant current boost circuit is electrically connected described two-way
First anode connection terminal of DC-DC constant current charge-discharge unit, the output end of the constant-current decompression circuit are electrically connected the third electricity
One end of switch is controlled, the input terminal of the constant current boost circuit is electrically connected one end of the 4th electric-controlled switch, the third electricity
The other end of control switch and the 4th electric-controlled switch is being electrically connected the second of the bi-directional DC-DC constant current charge-discharge unit just
Pole connecting pin；
The controlled end of the third electric-controlled switch and the 4th electric-controlled switch is electrically connected described control unit.
Optimization, further include the wireless transmit/receive units for having communication connection described control unit, wherein the wireless receiving and dispatching list
Member includes bluetooth wireless transceiver circuit, WiFi wireless transceiver circuit, ZigBee wireless transceiver circuit and/or GPRS wireless receiving and dispatching electricity
Road.
The utility model has the following beneficial effects:
(1) the invention provides a kind of new li-ion cell protection that battery pack active equalization is realized based on super capacitor
On the one hand plate can use super capacitor as electricity temporary storage medium, and first choose high-voltage lithium to super capacitor into
Row constant-current charge, then low-voltage lithium battery is chosen to receive the constant-current discharge from super capacitor, to realize that battery pack is actively equal
Weigh purpose, and both can guarantee each shifting savings all is to take high benefit low, invalid charge and discharge cycles is avoided, so as to battery life
It has little effect, can also guarantee the constant of euqalizing current using DC-DC constant current charge-discharge technology, so that will not be because of battery
Between pressure difference it is smaller and influence the ability of equalization；It on the other hand can also be according to from battery voltage acquisition unit and current acquisition
The collection result of unit judges the emergency cases such as whether lithium battery group overcharges, over-discharge or overcurrent, if then control general supply in time
Electric-controlled switch cut-off, realizes the external protection purpose to lithium battery group；
(2) 2 electricity of balanced only needs of one-shot battery voltage from high to low are completed and move process, equalization efficiency is not by electricity
The influence of distance, substantially increases equalization efficiency between pond, and though that is, single battery number how much, equalization efficiency can be made about
Equal to 0.9；
(3) lithium battery protection board also has high degree of automation, convenient test, practical and low in cost etc. excellent
Point is convenient for practical application and popularization.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the electrical block diagram of lithium battery protection board provided by the utility model.
Fig. 2 is the electrical block diagram of battery voltage acquisition unit provided by the utility model.
Fig. 3 is the electrical block diagram of the first battery gating matrix provided by the utility model.
Fig. 4 is the electrical block diagram of bi-directional DC-DC constant current charge-discharge unit provided by the utility model.
Specific embodiment
With reference to the accompanying drawing and specific embodiment is further elaborated the utility model.It should be noted that right
It is used to help understand the utility model in the explanation of these way of example, but does not constitute the restriction to the utility model.This
Specific structure and function detail disclosed in text are only used for the example embodiment of description the utility model.However, available many alternative
Form embody the utility model, and be not construed as the utility model and be limited in embodiment set forth herein.
It will be appreciated that though term first, second etc. can be used herein to describe various units, these units are not answered
When being limited by these terms.These terms are only used to distinguish a unit and another unit.Such as it can be single by first
Member is referred to as second unit, and similarly second unit can be referred to as first unit, without departing from showing for the utility model
The range of example embodiment.
It should be appreciated that the terms "and/or", only a kind of incidence relation for describing affiliated partner, expression can be with
There are three kinds of relationships, for example, A and/or B, can indicate: individualism A, individualism B exist simultaneously tri- kinds of situations of A and B,
The terms "/and " are to describe another affiliated partner relationship, indicate may exist two kinds of relationships, can be with for example, A/ and B
Indicate: two kinds of situations of individualism A, individualism A and B, in addition, character "/" herein, typicallying represent forward-backward correlation object is
A kind of "or" relationship.
It should be appreciated that when by unit referred to as with another unit " connection ", " connected " or " coupling " when, it can with it is another
A unit is directly connected or couples or temporary location may exist.Relatively, it is referred to as with another unit " directly when by unit
It is connected " or when " direct-coupling ", temporary location is not present.It should explain in a similar manner for describing the relationship between unit
Other words (for example, " ... between " to " between directly existing ... ", " adjacent " is to " direct neighbor " etc.).
Terms used herein are only used for description specific embodiment, and the example for being not intended to limit the utility model is implemented
Example.As it is used herein, singular "a", "an" and "the" is intended to include plural form, unless context is clear
Indicate contrary.It should also be understood that term " includes ", " including ", "comprising" and/or " containing " are as used herein,
Specified stated feature, integer, step, operation, unit and/or component existence, and be not excluded for it is one or more its
His feature, quantity, step, operation, unit, component and/or their combination existence or increase.
It will be further noted that the function action occurred may be with the sequence of attached drawing appearance in some alternative embodiments
It is different.Such as related function action is depended on, it can actually substantially be executed concurrently, or sometimes can be with phase
Anti- sequence executes continuously show two figures.
Specific details is provided, in the following description in order to which example embodiment is understood completely.However ability
Domain those of ordinary skill is it is to be understood that implementation example embodiment without these specific details.Such as it can be
System is shown in block diagram, to avoid with unnecessary details come so that example is unclear.It in other instances, can not be with need not
The details wanted shows well-known process, structure and technology, to avoid making example embodiment unclear.
Embodiment one
As shown in figures 1-4, the lithium battery that battery pack active equalization is realized based on super capacitor provided in this embodiment
Protection board, including circuit board, and battery voltage acquisition unit, the first battery gating matrix, control are disposed on the circuit board
Unit, bi-directional DC-DC constant current charge-discharge unit, super capacitor HC, current acquisition unit and general supply electric-controlled switch KT processed,
In, the battery voltage acquisition unit is used to obtain the positive and negative interpolar electricity of each serial lithium battery in lithium battery group (BAT1~n)
Pressure value, the first battery gating matrix include n+1 battery terminal connections and are used for described in electrical connection correspondingly respectively
Anode/cathode of each serial lithium battery in lithium battery group, and for making any one series connection lithium electricity in the lithium battery group
It pond can individually the first anode connection terminal PD1+ of the bi-directional DC-DC constant current charge-discharge unit in parallel and the first cathode connecting pin
PD1-, n are the natural number not less than 3；The output end PVout of the battery voltage acquisition unit is electrically connected described control unit,
Described control unit be also electrically connected first battery gating matrix gating control terminal (CT1~2) and the two-way DC-
The charge and discharge switch terminal CH1 of DC constant current charge-discharge unit, the second anode connection terminal of the bi-directional DC-DC constant current charge-discharge unit
PD2+ is electrically connected the anode of the super capacitor HC, the second cathode connecting pin of the bi-directional DC-DC constant current charge-discharge unit
PD2- is electrically connected the cathode of the super capacitor HC；The current input terminal of the current acquisition unit is for being electrically connected the lithium electricity
The general supply anode of pond group (BAT1~n), the current output terminal electrical connection general supply of the current acquisition unit is automatically controlled to be opened
One end of KT is closed, the other end of the general supply electric-controlled switch KT is used to be electrically connected the positive pole of electrical appliance, and the electric current is adopted
The controlled end of the acquisition signal output end and the general supply electric-controlled switch KT that collect unit is electrically connected described control unit.
As described in Fig. 1~4, in the particular circuit configurations of the lithium battery protection board, the battery voltage acquisition module
For obtaining the positive and negative interpolar voltage value of each serial lithium battery in lithium battery group (BAT1~n), and by the positive and negative voltage across poles
Value is sent to described control unit.The first battery gating matrix is used for (i.e. logical under the gating control of described control unit
Cross to the gating control terminal of first battery gating matrix and send suitable control signal), make the mesh in the lithium battery group
Marking lithium battery (high-voltage lithium i.e. to individually discharge or the low-voltage lithium battery to individually charge) can individually institute in parallel
State the first anode connection terminal PD1+ and the first cathode connecting pin PD1- of bi-directional DC-DC constant current charge-discharge unit, herein " simultaneously
Connection " refers to that the anode of target lithium battery is electrically connected the cathode electrical connection of the first anode connection terminal PD1+ and target lithium battery
First cathode connecting pin PD1-.
Described control unit is the logic control core of this lithium battery protection board, on the one hand according to the current of each lithium battery
Positive and negative interpolar voltage value relatively determines the high-voltage lithium to individually discharge or the low-voltage lithium battery to individually charge, separately
On the one hand suitable control signal is sent by gating the gating control terminal of matrix to first battery, makes the lithium battery group
In the target lithium battery individually bi-directional DC-DC constant current charge-discharge unit in parallel the first anode connection terminal PD1+ and first
Cathode connecting pin PD1-, while being charged by being sent to the charge and discharge switch terminal CH1 of the bi-directional DC-DC constant current charge-discharge unit
Starting/electric discharge enabling signal, makes the electricity of high-voltage lithium be stored temporarily in the super capacitor by constant current charging method
It in HC or is transferred to the electricity in the super capacitor HC in low-voltage lithium battery by constant-current discharge mode, realizes high electricity
Press the purpose of lithium battery decompression or the boosting of low-voltage lithium battery；On the other hand also according to the current positive and negative interpolar electricity of each lithium battery
Pressure value judges whether corresponding lithium battery overcharges or over-discharge, and according to from the current acquisition unit and real-time acquisition
Lithium battery group total current, judge lithium battery group charge or discharge whether overcurrent, if the burst feelings such as discovery overcharges, over-discharge or overcurrent
Condition can control the general supply electric-controlled switch KT cut-off in time, realize the external protection purpose to lithium battery group；In addition, described
Control unit can be, but not limited to the microprocessor chip (i.e. MCU) and its peripheral circuit using model STM32F105 series,
The aforementioned logic judgment being related to and control program can carry out routinely change according to existing associated control procedures and obtain.
The bi-directional DC-DC constant current charge-discharge unit is used under the control of described control unit, is realized to described super
Capacitor HC carries out the purpose of constant-current charge or constant-current discharge, keeps the electricity in high-voltage lithium final again back to low-voltage lithium
In battery, active equalization is realized.The super capacitor HC is used for the interim intermediary stored as electricity, makes to need to be transferred
Part electricity can be discharged afterwards by first storing.The current acquisition unit is for acquiring in lithium battery group charge or discharge
Total current size, concretely galvanometer.The general supply electric-controlled switch KT is used under the control of described control unit, in
Appropriate time (such as the emergency cases such as discovery overcharges, over-discharge or overcurrent) cut-off disconnects, and plays the external protection to lithium battery group
Effect, can specifically use relay.
Hereby based on the detailed description of aforementioned lithium battery protection board, it is temporary as electricity on the one hand to can use super capacitor
Medium is deposited, and high-voltage lithium is first chosen to carry out constant-current charge to super capacitor, then the reception of low-voltage lithium battery is chosen to come from
The constant-current discharge of super capacitor can both guarantee that each shifting savings are all to take height to realize battery pack active equalization purpose
It mends low, avoids invalid charge and discharge cycles, so that having little effect to battery life, DC-DC constant current charge and discharge can also be utilized
Power technology guarantees the constant of euqalizing current, so that the ability of equalization will not be influenced because the pressure difference between battery is smaller；Another party
Face can also according to the collection result from battery voltage acquisition unit and current acquisition unit, judge lithium battery group whether mistake
It fills, the emergency cases such as over-discharge or overcurrent, if then control general supply electric-controlled switch cut-off in time, is realized to the external of lithium battery group
Protect purpose.In addition, completing 2 electricity of balanced only needs of one-shot battery voltage from high to low moves process, equalization efficiency is not
Influenced by distance between battery, substantially increase equalization efficiency, and though that is, single battery number how much, balanced effect can be made
Rate is approximately equal to 0.9 (i.e. 0.95 square).
It is provided in this embodiment based on super capacitor realize battery pack active equalization lithium battery protection board with it is other existing
Balance protection plate is compared, and specific feature may be summarized as follows shown in table 1:
Table 1. realizes the lithium battery protection board and other existing balance protection plates of battery pack active equalization based on super capacitor
The characteristics of compare
Optimization, the battery voltage acquisition unit includes the second battery gating matrix and analog to digital conversion circuit, wherein
The second battery gating matrix also includes n+1 battery terminal connections and is used to be electrically connected the lithium electricity correspondingly respectively
Anode/cathode of each serial lithium battery in the group of pond, and for making any one serial lithium battery in the lithium battery group can
The individually electrode input end BAT+ and negative input BAT- of analog-digital conversion circuit as described in parallel；Second battery gates square
The gating control terminal (CT3~4) of battle array is electrically connected described control unit, and the output end of analog-digital conversion circuit as described is as the battery
The output end PVout of voltage acquisition unit.As shown in Fig. 2, the second battery gating matrix is used in described control unit
(suitable control signal is sent by gating the gating control terminal of matrix to second battery) under gating control, make described
All serial lithium batteries in lithium battery group can poll independent analog-digital conversion circuit as described in parallel electrode input end BAT+
With negative input BAT-, " parallel connection " herein refer to the anode of single lithium battery be electrically connected the electrode input end BAT+ and
The cathode of single lithium battery is electrically connected the negative input BAT-.Analog-digital conversion circuit as described is used for currently selected lithium battery
Positive and negative interpolar voltage level analog-to-digital conversion be corresponding current positive and negative interpolar voltage value, obtain the lithium battery group to realize
In each serial lithium battery positive and negative interpolar voltage value purpose.In addition, existing modulus can be used in analog-digital conversion circuit as described
Conversion chip and its peripheral circuit are realized.
Further specifically, second battery gating matrix includes that the 3rd n selects 1 multiple selector and the 4th n to select more than 1
Road selector, wherein the 3rd n selects n input terminal of 1 multiple selector as the battery of second battery gating matrix
Connecting pin is used to be electrically connected the anode of each serial lithium battery in the lithium battery group correspondingly respectively, and the 3rd n selects 1
The electrode input end BAT+, the 4th n of the output end electrical connection analog-digital conversion circuit as described of multiple selector select 1 multi-path choice
N input terminal of device is used for respectively described in electrical connection correspondingly as the battery terminal connections of second battery gating matrix
The cathode of each serial lithium battery in lithium battery group, the 4th n select the output end of 1 multiple selector to be electrically connected the modulus turn
Change the negative input BAT- of circuit；Described control unit is also electrically connected the gating control that the 3rd n selects 1 multiple selector
End CT3 processed and the 4th n selects the gating control terminal CT4 of 1 multiple selector.As shown in Fig. 2, the 3rd n selects 1 multi-path choice
Device and the 4th n select 1 multiple selector is optional to have existing multiple selector combination to constitute, such as 8 select 1 multi-path choice
Device, 4 select 1 multiple selector and 2 select 1 multiple selector etc., pass through to gating control terminal CT3 and CT4 and send suitable control
Signal can choose the anode of target lithium battery and cathode to be electrically connected analog-digital conversion circuit as described unit correspondingly respectively
Electrode input end BAT+ and negative input BAT-.In addition specifically, the n+1 battery in second battery gating matrix connects
It connects end and is in series with the second electric-controlled switch (CK0/1/2/3~n) respectively, wherein second electric-controlled switch (CK0/1/2/3~n)
Controlled end be electrically connected described control unit.As shown in Fig. 2, second electric-controlled switch can be, but not limited to for switching tube or after
Electric appliance can flexibly control whether certain is connected all the way, facilitate survey by second electric-controlled switch (CK0/1/2/3~n) of connecting
Examination.
Optimization, the first battery gating matrix includes that the first n selects 1 multiple selector and the 2nd n to select 1 multi-path choice
Device, wherein the first n selects n input terminal of 1 multiple selector as the battery terminal connections of first battery gating matrix
For being electrically connected the anode of each serial lithium battery in the lithium battery group correspondingly respectively, the first n selects 1 multichannel to select
The output end for selecting device is electrically connected the first anode connection terminal PD1+ of the bi-directional DC-DC constant current charge-discharge unit, the 2nd n choosing
N input terminal of 1 multiple selector is used for respectively correspondingly as the battery terminal connections of first battery gating matrix
It is electrically connected the cathode of each serial lithium battery in the lithium battery group, the 2nd n selects the output end of 1 multiple selector to be electrically connected
First cathode connecting pin PD1- of the bi-directional DC-DC constant current charge-discharge unit；Described control unit is also electrically connected described
First n selects the gating control terminal CT1 of 1 multiple selector and the 2nd n to select the gating control terminal CT2 of 1 multiple selector.Such as figure
Shown in 3, the first n selects 1 multiple selector and the 2nd n to select 1 multiple selector is optional to have existing multiple selector
Combination is constituted, such as 8 select 1 multiple selector, 4 to select 1 multiple selector and 2 select 1 multiple selector etc., by controlling to gating
It holds CT1 and CT2 to send suitable control signal, the anode of target lithium battery and cathode can be chosen to be electrically connected correspondingly respectively
Meet the first anode connection terminal PD1+ and the first cathode connecting pin PD1- of the bi-directional DC-DC constant current charge-discharge unit.In addition have
Body, it is in series with the first electric-controlled switch (BK0/1/2/3 respectively in n+1 battery terminal connections of first battery gating matrix
~n), wherein the controlled end of first electric-controlled switch (BK0/1/2/3~n) is electrically connected described control unit.As shown in figure 3,
First electric-controlled switch can be, but not limited to pass through series connection the first electric-controlled switch (BK0/1/ for switching tube or relay
2/3~n), it can flexibly control whether certain is connected all the way, facilitate test.
Optimization, the bi-directional DC-DC constant current charge-discharge unit includes constant-current decompression circuit, constant current boost circuit, the
Three electric-controlled switch K3 and the 4th electric-controlled switch K4；The output of the input terminal of the constant-current decompression circuit and the constant current boost circuit
End is electrically connected the first anode connection terminal PD1+ of the bi-directional DC-DC constant current charge-discharge unit, the constant-current decompression circuit
Output end be electrically connected one end of the third electric-controlled switch K3, the input terminal electrical connection the described 4th of the constant current boost circuit
The other end of one end of electric-controlled switch K4, the third electric-controlled switch K3 and the 4th electric-controlled switch K4 are electrically connected described
Second anode connection terminal PD2+ of bi-directional DC-DC constant current charge-discharge unit；The third electric-controlled switch K3 and described 4th automatically controlled
The controlled end of switch K4 is electrically connected described control unit.As shown in figure 4, the constant-current decompression circuit is for realizing constant current drop
Press purpose that can use existing perseverance so that the electricity constant current of high-voltage lithium to be filled in the super capacitor HC
Stream decompression chip and its peripheral circuit are realized.The constant current boost circuit is for realizing constant current boost purpose, described to surpass
It is filled in low-voltage lithium battery to electricity constant current in grade capacitor HC, existing constant current boost chip and its periphery can be used
Circuit is realized.The third electric-controlled switch K3 and the 4th electric-controlled switch K4 is used under the control of described control unit (i.e.
The controlled end of the third electric-controlled switch K3 and the 4th electric-controlled switch K4 are as the bi-directional DC-DC constant current charge-discharge unit
Charge and discharge switch terminal CH1), the switching corresponding charging paths of ground conduction and cut-off and discharge paths: (1) need to be to described super
When capacitor HC constant-current charge, the third electric-controlled switch K3 is connected, the 4th electric-controlled switch K4 cut-off；(2) need to be to institute
When stating super capacitor HC constant-current discharge, end the third electric-controlled switch K3, the 4th electric-controlled switch K4 conducting；Thus may be used
To realize that constant current charge-discharge switches purpose.In addition, the third electric-controlled switch K3 and the 4th electric-controlled switch K4 equally can be with
But it is not limited to switching tube or relay.
Optimization, further include the wireless transmit/receive units for having communication connection described control unit, wherein the wireless receiving and dispatching list
Member can be, but not limited to include bluetooth wireless transceiver circuit, WiFi wireless transceiver circuit, ZigBee wireless transceiver circuit and/or
GPRS wireless transceiver circuit etc..As shown in Figure 1, the wireless transmit/receive units are wireless for being responsible for realizing with external user terminal
Communication, so that generated process data is real-time transmitted to user terminal, wherein the user terminal can be, but not limited to for
Smart phone or tablet computer etc., the process data can be, but not limited to include the current positive and negative of each lithium battery in battery pack
Voltage across poles value, it is possible thereby to monitor the current positive and negative anodes electricity of each lithium battery by the APP program run on the subscriber terminal
The relevant informations such as pressure value, equilibrium state or euqalizing current further facilitate practical.
To sum up, using the li-ion cell protection for realizing battery pack active equalization provided by the present embodiment based on super capacitor
Plate has the following technical effect that
(1) a kind of new lithium battery protection board that battery pack active equalization is realized based on super capacitor is present embodiments provided,
On the one hand it can use super capacitor as electricity temporary storage medium, and it is permanent first to choose high-voltage lithium to carry out super capacitor
Current charge, then low-voltage lithium battery is chosen to receive the constant-current discharge from super capacitor, to realize battery pack active equalization mesh
, both can guarantee each shifting savings all is to take high benefit low, invalid charge and discharge cycles is avoided, so that almost to battery life
It does not influence, can also guarantee the constant of euqalizing current using DC-DC constant current charge-discharge technology, so that will not be because of between battery
Pressure difference it is smaller and influence the ability of equalization；It on the other hand can also be according to from battery voltage acquisition unit and current acquisition unit
Collection result, the emergency cases such as whether lithium battery group overcharges, over-discharge or overcurrent are judged, if then control general supply is automatically controlled in time
Switch cut-off, realizes the external protection purpose to lithium battery group；
(2) 2 electricity of balanced only needs of one-shot battery voltage from high to low are completed and move process, equalization efficiency is not by electricity
The influence of distance, substantially increases equalization efficiency between pond, and though that is, single battery number how much, equalization efficiency can be made about
Equal to 0.9；
(3) lithium battery protection board also has high degree of automation, convenient test, practical and low in cost etc. excellent
Point is convenient for practical application and popularization.
Multiple embodiments described above are only schematical, wherein described, unit can as illustrated by the separation member
It is physically separated with being or may not be, component shown as a unit may or may not be physics list
Member, it can it is in one place, or may be distributed over multiple network units.It can be selected according to the actual needs
In some or all of unit achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying creativeness
Labour in the case where, it can understand and implement.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can
It realizes by means of software and necessary general hardware platform, naturally it is also possible to pass through hardware.Based on this understanding, on
Stating technical solution, substantially the part that contributes to existing technology can be embodied in the form of software products in other words, should
Computer software product may be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, CD, including several fingers
It enables with so that a computer equipment executes method described in certain parts of each embodiment or embodiment.
Above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；Although referring to aforementioned reality
Example is applied the utility model is described in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features.And these
It modifies or replaces, the spirit and model of various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution
It encloses.
Finally it should be noted that the utility model is not limited to above-mentioned optional embodiment, anyone is practical new at this
Other various forms of products can be all obtained under the enlightenment of type.Above-mentioned specific embodiment should not be understood pairs of the utility model
The limitation of protection scope, the protection scope of the utility model should be subject to be defined in claims, and specification can
For interpreting the claims.
Claims (8)
1. a kind of lithium battery protection board for realizing battery pack active equalization based on super capacitor, including circuit board, it is characterised in that:
Battery voltage acquisition unit, the first battery gating matrix, control unit, bi-directional DC-DC constant current are disposed on the circuit board
Charge/discharge unit, super capacitor (HC), current acquisition unit and general supply electric-controlled switch (KT), wherein the cell voltage is adopted
Collection unit is used to obtain the positive and negative interpolar voltage value of each serial lithium battery in lithium battery group (BAT1~n), first battery
Gating matrix includes n+1 battery terminal connections and is used to be electrically connected each series connection in the lithium battery group correspondingly respectively
Anode/cathode of lithium battery, and for making any one serial lithium battery in the lithium battery group can be individually described in parallel connection
The first anode connection terminal (PD1+) of bi-directional DC-DC constant current charge-discharge unit and the first cathode connecting pin (PD1-), n be not less than
3 natural number；
The output end (PVout) of the battery voltage acquisition unit is electrically connected described control unit, and described control unit is also distinguished
Be electrically connected first battery gating matrix gating control terminal (CT1~2) and the bi-directional DC-DC constant current charge-discharge unit
Charge and discharge switch terminal (CH1), the bi-directional DC-DC constant current charge-discharge unit the second anode connection terminal (PD2+) electrical connection described in
Second cathode connecting pin (PD2-) of the anode of super capacitor (HC), the bi-directional DC-DC constant current charge-discharge unit is electrically connected institute
State the cathode of super capacitor (HC)；
The current input terminal of the current acquisition unit is used to be electrically connected the general supply anode of the lithium battery group (BAT1~n),
The current output terminal of the current acquisition unit is electrically connected one end of the general supply electric-controlled switch (KT), and the general supply is automatically controlled
The other end of switch (KT) is used to be electrically connected the positive pole of electrical appliance, the acquisition signal output end of the current acquisition unit and
The controlled end of the general supply electric-controlled switch (KT) is electrically connected described control unit.
2. a kind of lithium battery protection board for realizing battery pack active equalization based on super capacitor as described in claim 1, special
Sign is: the battery voltage acquisition unit includes the second battery gating matrix and analog to digital conversion circuit, wherein described second
Battery gating matrix also includes n+1 battery terminal connections and is used to be electrically connected correspondingly respectively in the lithium battery group each
Anode/cathode of a serial lithium battery, and for making any one serial lithium battery in the lithium battery group can individually simultaneously
Join the electrode input end (BAT+) and negative input (BAT-) of analog-digital conversion circuit as described；
The gating control terminal (CT3~4) of the second battery gating matrix is electrically connected described control unit, the analog-to-digital conversion electricity
Output end (PVout) of the output end on road as the battery voltage acquisition unit.
3. a kind of lithium battery protection board for realizing battery pack active equalization based on super capacitor as claimed in claim 2, special
Sign is: the second battery gating matrix includes that the 3rd n selects 1 multiple selector and the 4th n to select 1 multiple selector, wherein
3rd n selects n input terminal of 1 multiple selector as the battery terminal connections of second battery gating matrix for distinguishing
It is electrically connected the anode of each serial lithium battery in the lithium battery group correspondingly, the 3rd n selects the defeated of 1 multiple selector
Outlet is electrically connected the electrode input end (BAT+) of analog-digital conversion circuit as described, and the 4th n selects n of 1 multiple selector to input
Hold the battery terminal connections as second battery gating matrix for being electrically connected in the lithium battery group correspondingly respectively
The cathode of each serial lithium battery, the 4th n select the output end of 1 multiple selector to be electrically connected the negative of analog-digital conversion circuit as described
Pole input terminal (BAT-)；
Described control unit is also electrically connected the gating control terminal (CT3) and the described 4th that the 3rd n selects 1 multiple selector
N selects the gating control terminal (CT4) of 1 multiple selector.
4. a kind of lithium battery protection board for realizing battery pack active equalization based on super capacitor as claimed in claim 3, special
Sign is: being in series with the second electric-controlled switch (CK0/1/2/ respectively in n+1 battery terminal connections of second battery gating matrix
3~n), wherein the controlled end of second electric-controlled switch (CK0/1/2/3~n) is electrically connected described control unit.
5. a kind of lithium battery protection board for realizing battery pack active equalization based on super capacitor as described in claim 1, special
Sign is: the first battery gating matrix includes that the first n selects 1 multiple selector and the 2nd n to select 1 multiple selector, wherein
First n selects n input terminal of 1 multiple selector as the battery terminal connections of first battery gating matrix for distinguishing
It is electrically connected the anode of each serial lithium battery in the lithium battery group correspondingly, the first n selects the defeated of 1 multiple selector
Outlet is electrically connected the first anode connection terminal (PD1+) of the bi-directional DC-DC constant current charge-discharge unit, and the 2nd n selects 1 multichannel
N input terminal of selector is used to be electrically connected correspondingly respectively as the battery terminal connections of first battery gating matrix
The cathode of each serial lithium battery in the lithium battery group, it is described double that the 2nd n selects the output end of 1 multiple selector to be electrically connected
To the first cathode connecting pin (PD1-) of DC-DC constant current charge-discharge unit；
Described control unit is also electrically connected the gating control terminal (CT1) and described second that the first n selects 1 multiple selector
N selects the gating control terminal (CT2) of 1 multiple selector.
6. a kind of lithium battery protection board for realizing battery pack active equalization based on super capacitor as claimed in claim 5, special
Sign is: being in series with the first electric-controlled switch (BK0/1/2/ respectively in n+1 battery terminal connections of first battery gating matrix
3~n), wherein the controlled end of first electric-controlled switch (BK0/1/2/3~n) is electrically connected described control unit.
7. a kind of lithium battery protection board for realizing battery pack active equalization based on super capacitor as described in claim 1, special
Sign is: the bi-directional DC-DC constant current charge-discharge unit includes constant-current decompression circuit, constant current boost circuit, third is automatically controlled opens
Close (K3) and the 4th electric-controlled switch (K4)；
The output end of the input terminal of the constant-current decompression circuit and the constant current boost circuit is electrically connected the bi-directional DC-DC
The first anode connection terminal (PD1+) of constant current charge-discharge unit, the output end of the constant-current decompression circuit are electrically connected the third electricity
One end of control switch (K3), the input terminal of the constant current boost circuit are electrically connected one end of the 4th electric-controlled switch (K4), institute
The other end for stating third electric-controlled switch (K3) and the 4th electric-controlled switch (K4) is electrically connected the bi-directional DC-DC constant current and fills
The second anode connection terminal (PD2+) of discharge cell；
The controlled end of the third electric-controlled switch (K3) and the 4th electric-controlled switch (K4) is electrically connected described control unit.
8. a kind of lithium battery protection board for realizing battery pack active equalization based on super capacitor as described in claim 1, special
Sign is: further including the wireless transmit/receive units for having communication connection described control unit, wherein the wireless transmit/receive units include indigo plant
Tooth wireless transceiver circuit, WiFi wireless transceiver circuit, ZigBee wireless transceiver circuit and/or GPRS wireless transceiver circuit.
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| CN201920479589.6U CN209462059U (en) | 2019-04-10 | 2019-04-10 | A kind of lithium battery protection board for realizing battery pack active equalization based on super capacitor |
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| CN201920479589.6U CN209462059U (en) | 2019-04-10 | 2019-04-10 | A kind of lithium battery protection board for realizing battery pack active equalization based on super capacitor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112701746A (en) * | 2020-12-11 | 2021-04-23 | 珠海格力电器股份有限公司 | Battery equalization control method and device, storage medium and electronic device |
| CN112736305A (en) * | 2020-12-30 | 2021-04-30 | 绵阳力王新能源科技有限公司 | Lithium battery based on remote power failure and active equalization and working method |
-
2019
- 2019-04-10 CN CN201920479589.6U patent/CN209462059U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112701746A (en) * | 2020-12-11 | 2021-04-23 | 珠海格力电器股份有限公司 | Battery equalization control method and device, storage medium and electronic device |
| CN112736305A (en) * | 2020-12-30 | 2021-04-30 | 绵阳力王新能源科技有限公司 | Lithium battery based on remote power failure and active equalization and working method |
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