A kind of battery combiner and the DC power system with the battery combinerTechnical field
The present invention relates to power electronics field, in particular to a kind of battery combiner and with the battery combinerDC power system.
Background technique
With the increasingly developed of science and technology, battery is as the important guarantee function and direct current in DC power systemIndispensable part in power-supply system.With the development of DC power supply, the existing storage battery of DC power supply is integratedIt is required that more more and more urgent.Existing DC power supply device if necessary to by battery pack it is directly used in parallel, just only have access same capacity,Same producer, same type, the battery with batch.If user wants using existing battery pack, i.e., using different capabilities, different manufacturers,Different type, the battery of different batches are directly used in parallel, and carrying out capacity extension then cannot achieve, it is necessary to the same genus more renewedProperty battery pack.
In the prior art, DC power supply device largely includes battery group；Battery group be it is a kind of alternating current it is normal orIt can guarantee in the case of the various accidents of person to the power-supply system of DC equipment reliable power supply, it may be said that be that a kind of direct current does not have a power failure electricitySource system.Battery group is the heart of direct current uniterruptible power system, is that highest part is worth in a whole set of DC power supply device.Electric power storageThe Capacity Selection in pond is to determine that user load is bigger according to user load size and standby electric duration, it is desirable that standby electricity duration is more long,The accumulator capacity of selection will be bigger, since the bigger cost of battery group capacity is higher, in existing DC power supply deviceIn it is mostly be that can substantially reduce the capacity of single group battery in this way using by the way of two groups or the directly parallel connection of plurality of groups of storage batteries groupIt is required that achieving the purpose that reduce cost.
But find that at least there are the following problems in the prior art during inventor designs DC power system:
The self-characteristic of existing battery group, only had access in same DC equipment same capacity, same to producer, same type,With the battery pack of batch, different capabilities, different manufacturers, different type, the battery pack of different batches cannot be directly used in parallel, noIt then can be since the difference of battery parameter between new used batteries, different capabilities battery, different manufacturers battery itself be (such as in batteryResistance), cause the accelerated ageing and damage of battery.If user wants to increase the standby electric duration of DC power system or expands loadCapacity, just there is bigger requirement to battery group capacity, and current scheme can only be by replacing whole battery groups simultaneously come realExisting, the scheme that can not only increase by one group or two groups new battery group in existing equipment realizes user demand.It thereby results inExisting battery cannot use, and also purchase new high capacity cell, bring the waste of resource and the increase of cost.
Summary of the invention
In view of the above problems, it proposes on the present invention overcomes the above problem or at least be partially solved in order to provide one kindA kind of battery combiner and the DC power system with the battery combiner for stating problem.
According to one aspect of the present invention, the present invention provides a kind of battery combiner, which includes: controlThe main connection unit of unit, at least two-way and at least two-way by-pass unit；
Described control unit, for being communicated with DC power supply device, according to the demand of the DC power supply device, controlMake the conducting and disconnection of the main connection unit and the by-pass unit；
The main connection unit, for the instruction according to described control unit, conducting is in parallel with the DC power supply device,Or it disconnects in parallel with the DC power supply device；
The by-pass unit is parallel to the main connection unit both ends, in battery pack switching, the main connection to be singleMember disconnects, and according to the instruction of described control unit, starting discharges to the DC power supply device, the DC power supply device orThe battery pack cannot charge to the battery pack.
Wherein, the main connection unit, comprising: main D.C. contactor；Described main D.C. contactor one end and the batteryGroup is connected, and the other end is connected with the DC power supply device.
Wherein, the main connection unit, further includes: fuse；
Described fuse one end is connected with described main D.C. contactor one end, the other end and the DC power supply device phaseEven.
Wherein, the by-pass unit, comprising: D.C. contactor and counnter attack diode；
The D.C. contactor is connected with the counnter attack diode；The D.C. contactor of the connection and two pole of counnter attackThe parallel connection of pipe both ends and the main connection unit both ends.
Wherein, when battery pack is four groups, when the main connection unit is with tetra- tunnel by-pass unit Dou Wei, the battery packIt include: battery pack 1, battery pack 2, battery pack 3 and battery pack 4；The main connection unit includes: the first main connection unit, and secondMain connection unit, the main connection unit of third, the 4th main connection unit；Wherein, the described first main connection unit includes: first main straightFlow contactor K1, first fuse FU1；The second main connection unit includes: the second main D.C. contactor K2, second fuseFU2；The main connection unit of third includes: the main D.C. contactor K3 of third, third fuse FU3；The 4th main connection is singleMember includes: the 4th main D.C. contactor K4, the 4th fuse FU4；The by-pass unit includes: the first by-pass unit, by the of secondRoad unit, third by-pass unit and the 4th by-pass unit；Wherein, first by-pass unit includes: the first D.C. contactor K5With the first counnter attack diode D1；Second by-pass unit includes: the second D.C. contactor K6 and the second counnter attack diode D2；InstituteStating third by-pass unit includes: third D.C. contactor K7 and third counnter attack diode D3；4th by-pass unit includes:Four D.C. contactor K8 and the 4th counnter attack diode D4；
Described first one end main D.C. contactor K1 is connected with the battery pack 1, the other end and the first fuse FU1One end is connected；The first main D.C. contactor K1 conducting is controlled with disconnection by described control unit；The first fuse FU1Another termination DC power supply device；
Described one end first D.C. contactor K5 is connect with the first counnter attack diode D1 positive terminal, first direct currentAnother termination of contactor K5 first fuse FU1 and the described first connecting pin main D.C. contactor K1；First counnter attackDiode D1 cathode terminates the battery pack 1 and the described first connecting pin main D.C. contactor K1；
Described second one end main D.C. contactor K2 is connected with the battery pack 2, the other end and the second fuse FU2One end is connected；The second main D.C. contactor K2 conducting is controlled with disconnection by described control unit；The second fuse FU2Another termination DC power supply device；
Described one end second D.C. contactor K6 is connect with the second counnter attack diode D2 positive terminal, second direct currentAnother termination of contactor K6 second fuse FU2 and the described second connecting pin main D.C. contactor K2；Second counnter attackDiode D2 cathode terminates the battery pack 2 and the described second connecting pin main D.C. contactor K2；
Described third one end main D.C. contactor K3 is connected with the battery pack 3, the other end and the third fuse FU3One end is connected；The main D.C. contactor K3 conducting of third is controlled with disconnection by described control unit；The third fuse FU3Another termination DC power supply device；
Described one end third D.C. contactor K7 is connect with the third counnter attack diode D3 positive terminal, the third direct currentAnother termination of contactor K7 third fuse FU3 and the connecting pin the third main D.C. contactor K3；The third counnter attackDiode D3 cathode terminates the battery pack 3 and the connecting pin the third main D.C. contactor K3；
Described 4th one end main D.C. contactor K4 is connected with the battery pack 4, the other end and the 4th fuse FU4One end is connected；The 4th main D.C. contactor K4 conducting is controlled with disconnection by described control unit；The 4th fuse FU4Another termination DC power supply device；
Described 4th one end D.C. contactor K8 is connect with the 4th counnter attack diode D4 positive terminal, the 4th direct currentAnother termination of contactor K8 the 4th fuse FU4 and the connecting pin the 4th main D.C. contactor K4；4th counnter attackDiode D4 cathode terminates the battery pack 4 and the connecting pin the 4th main D.C. contactor K4.
According to another aspect of the invention, the present invention provides a kind of DC power systems, comprising: battery combiner；The battery combiner includes: control unit, at least main connection unit of two-way and at least two-way by-pass unit；
Described control unit, for being communicated with DC power supply device, according to the demand of the DC power supply device, controlMake the conducting and disconnection of the main connection unit and the by-pass unit；
The main connection unit, for the instruction according to described control unit, conducting is in parallel with the DC power supply device,Or it disconnects in parallel with the DC power supply device；
The by-pass unit is parallel to the main connection unit both ends, in battery pack switching, the main connection to be singleMember disconnects, and according to the instruction of described control unit, starting discharges to the DC power supply device, the DC power supply device orThe battery pack cannot charge to the battery pack.
Wherein, the main connection unit, comprising: main D.C. contactor；Described main D.C. contactor one end and the batteryGroup is connected, and the other end is connected with the DC power supply device.
Wherein, the main connection unit, further includes: fuse；
Described fuse one end is connected with described main D.C. contactor one end, the other end and the DC power supply device phaseEven.
Wherein, the by-pass unit, comprising: D.C. contactor and counnter attack diode；
The D.C. contactor is connected with the counnter attack diode；The D.C. contactor of the connection and two pole of counnter attackThe parallel connection of pipe both ends and the main connection unit both ends.
Wherein, when battery pack is four groups, when the main connection unit is with tetra- tunnel by-pass unit Dou Wei, the battery packIt include: battery pack 1, battery pack 2, battery pack 3 and battery pack 4；The main connection unit includes: the first main connection unit, and secondMain connection unit, the main connection unit of third, the 4th main connection unit；Wherein, the described first main connection unit includes: first main straightFlow contactor K1, first fuse FU1；The second main connection unit includes: the second main D.C. contactor K2, second fuseFU2；The main connection unit of third includes: the main D.C. contactor K3 of third, third fuse FU3；The 4th main connection is singleMember includes: the 4th main D.C. contactor K4, the 4th fuse FU4；The by-pass unit includes: the first by-pass unit, by the of secondRoad unit, third by-pass unit and the 4th by-pass unit；Wherein, first by-pass unit includes: the first D.C. contactor K5With the first counnter attack diode D1；Second by-pass unit includes: the second D.C. contactor K6 and the second counnter attack diode D2；InstituteStating third by-pass unit includes: third D.C. contactor K7 and third counnter attack diode D3；4th by-pass unit includes:Four D.C. contactor K8 and the 4th counnter attack diode D4；
Described first one end main D.C. contactor K1 is connected with the battery pack 1, the other end and the first fuse FU1One end is connected；The first main D.C. contactor K1 conducting is controlled with disconnection by described control unit；The first fuse FU1Another termination DC power supply device；
Described one end first D.C. contactor K5 is connect with the first counnter attack diode D1 positive terminal, first direct currentAnother termination of contactor K5 first fuse FU1 and the described first connecting pin main D.C. contactor K1；First counnter attackDiode D1 cathode terminates the battery pack 1 and the described first connecting pin main D.C. contactor K1；
Described second one end main D.C. contactor K2 is connected with the battery pack 2, the other end and the second fuse FU2One end is connected；The second main D.C. contactor K2 conducting is controlled with disconnection by described control unit；The second fuse FU2Another termination DC power supply device；
Described one end second D.C. contactor K6 is connect with the second counnter attack diode D2 positive terminal, second direct currentAnother termination of contactor K6 second fuse FU2 and the described second connecting pin main D.C. contactor K2；Second counnter attackDiode D2 cathode terminates the battery pack 2 and the described second connecting pin main D.C. contactor K2；
Described third one end main D.C. contactor K3 is connected with the battery pack 3, the other end and the third fuse FU3One end is connected；The main D.C. contactor K3 conducting of third is controlled with disconnection by described control unit；The third fuse FU3Another termination DC power supply device；
Described one end third D.C. contactor K7 is connect with the third counnter attack diode D3 positive terminal, the third direct currentAnother termination of contactor K7 third fuse FU3 and the connecting pin the third main D.C. contactor K3；The third counnter attackDiode D3 cathode terminates the battery pack 3 and the connecting pin the third main D.C. contactor K3；
Described 4th one end main D.C. contactor K4 is connected with the battery pack 4, the other end and the 4th fuse FU4One end is connected；The 4th main D.C. contactor K4 conducting is controlled with disconnection by described control unit；The 4th fuse FU4Another termination DC power supply device；
Described 4th one end D.C. contactor K8 is connect with the 4th counnter attack diode D4 positive terminal, the 4th direct currentAnother termination of contactor K8 the 4th fuse FU4 and the connecting pin the 4th main D.C. contactor K4；4th counnter attackDiode D4 cathode terminates the battery pack 4 and the connecting pin the 4th main D.C. contactor K4.
It needs to increase the beneficial effects of the present invention are: efficiently solving user in equipment dilatation using technical solution of the present inventionAdd battery capacity, and the problem of existing battery pack buys new large-capacity battery pack again must not be changed without, makes full use ofExisting resource battery pack resource saves the cost of replacement battery pack.The not simple battery pack of the present invention is in parallel, leads toControl of the control unit to main connection unit and by-pass unit is crossed, and is communicated with DC power supply device, is realized to every group of electricityThe individual battery management of pond group realizes effective maintenance and protection to battery pack, extends battery pack service life, effectively anti-Only voltge surge battery pack in battery pack handoff procedure.
Detailed description of the invention
Fig. 1 is a kind of battery combiner structure schematic diagram provided by the invention；
Fig. 2 is that a kind of battery pack of working as provided by the invention is four groups, and the main connection unit and the by-pass unit are allWhen four tunnels, the circuit diagram of battery combiner；
Fig. 3 is a kind of DC power system structural schematic diagram provided by the invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present inventionFormula is described in further detail.
The present invention provides a kind of battery combiner and the DC power system with the battery combiner.
Fig. 1 is a kind of battery combiner structure schematic diagram provided by the invention；The battery combiner includes: control unit101, at least main connection unit 102 of two-way and at least two-way by-pass unit 103；
Described control unit, for being communicated with DC power supply device, according to the demand of the DC power supply device, controlMake the conducting and disconnection of the main connection unit and the by-pass unit；
The main connection unit, for the instruction according to described control unit, conducting is in parallel with the DC power supply device,Or it disconnects in parallel with the DC power supply device；
The by-pass unit is parallel to the main connection unit both ends, in battery pack switching, the main connection to be singleMember disconnects, and according to the instruction of described control unit, starting discharges to the DC power supply device, the DC power supply device orThe battery pack cannot charge to the battery pack.
Wherein, the main connection unit, comprising: main D.C. contactor；Described main D.C. contactor one end and the batteryGroup is connected, and the other end is connected with the DC power supply device.
Wherein, the main connection unit, further includes: fuse；
Described fuse one end is connected with described main D.C. contactor one end, the other end and the DC power supply device phaseEven.
Wherein, the by-pass unit, comprising: D.C. contactor and counnter attack diode；
The D.C. contactor is connected with the counnter attack diode；The D.C. contactor of the connection and two pole of counnter attackThe parallel connection of pipe both ends and the main connection unit both ends.
As shown in Fig. 2, to be provided in an embodiment of the present invention a kind of when battery pack is four groups, the main connection unit with it is describedWhen by-pass unit tetra- tunnel Dou Wei, the circuit diagram of battery combiner；Wherein, the battery pack includes: battery pack 1, battery pack 2, electricityPond group 3 and battery pack 4；The main connection unit includes: the first main connection unit, the second main connection unit, the main connection list of thirdMember, the 4th main connection unit；Wherein, the described first main connection unit includes: the first main D.C. contactor K1, first fuseFU1；The second main connection unit includes: the second main D.C. contactor K2, second fuse FU2；The main connection of third is singleMember includes: the main D.C. contactor K3 of third, third fuse FU3；The 4th main connection unit includes: the 4th main direct current contactDevice K4, the 4th fuse FU4；The by-pass unit includes: the first by-pass unit, the second by-pass unit, third by-pass unit and4th by-pass unit；Wherein, first by-pass unit includes: the first D.C. contactor K5 and the first counnter attack diode D1；InstituteStating the second by-pass unit includes: the second D.C. contactor K6 and the second counnter attack diode D2；The third by-pass unit includes:Three D.C. contactor K7 and third counnter attack diode D3；4th by-pass unit includes: the 4th D.C. contactor K8 and the 4thCounnter attack diode D4；
Described first one end main D.C. contactor K1 is connected with the battery pack 1, the other end and the first fuse FU1One end is connected；The first main D.C. contactor K1 conducting is controlled with disconnection by described control unit；The first fuse FU1Another termination DC power supply device；
Described one end first D.C. contactor K5 is connect with the first counnter attack diode D1 positive terminal, first direct currentAnother termination of contactor K5 first fuse FU1 and the described first connecting pin main D.C. contactor K1；First counnter attackDiode D1 cathode terminates the battery pack 1 and the described first connecting pin main D.C. contactor K1；
Described second one end main D.C. contactor K2 is connected with the battery pack 2, the other end and the second fuse FU2One end is connected；The second main D.C. contactor K2 conducting is controlled with disconnection by described control unit；The second fuse FU2Another termination DC power supply device；
Described one end second D.C. contactor K6 is connect with the second counnter attack diode D2 positive terminal, second direct currentAnother termination of contactor K6 second fuse FU2 and the described second connecting pin main D.C. contactor K2；Second counnter attackDiode D2 cathode terminates the battery pack 2 and the described second connecting pin main D.C. contactor K2；
Described third one end main D.C. contactor K3 is connected with the battery pack 3, the other end and the third fuse FU3One end is connected；The main D.C. contactor K3 conducting of third is controlled with disconnection by described control unit；The third fuse FU3Another termination DC power supply device；
Described one end third D.C. contactor K7 is connect with the third counnter attack diode D3 positive terminal, the third direct currentAnother termination of contactor K7 third fuse FU3 and the connecting pin the third main D.C. contactor K3；The third counnter attackDiode D3 cathode terminates the battery pack 3 and the connecting pin the third main D.C. contactor K3；
Described 4th one end main D.C. contactor K4 is connected with the battery pack 4, the other end and the 4th fuse FU4One end is connected；The 4th main D.C. contactor K4 conducting is controlled with disconnection by described control unit；The 4th fuse FU4Another termination DC power supply device；
Described 4th one end D.C. contactor K8 is connect with the 4th counnter attack diode D4 positive terminal, the 4th direct currentAnother termination of contactor K8 the 4th fuse FU4 and the connecting pin the 4th main D.C. contactor K4；4th counnter attackDiode D4 cathode terminates the battery pack 4 and the connecting pin the 4th main D.C. contactor K4.
Based on above embodiments, the realization principle of technical solution of the present invention is described in detail below；
It, can be using the electricity of technical solution of the present invention offer when DC power supply device needs dilatation to increase battery capacityPond combiner.
Such as when the battery combiner accesses 4 groups of different capabilities, different manufacturers, different type, different batches simultaneouslyWhen battery pack, carry out controlling it being connected to main connection unit and the by-pass unit by internal control unit by battery combinerOr disconnect, to realize DC power supply device demand；The DC power supply device demand passes through described control unit and direct currentPower-supply device control unit carries out communication realization, to realize the battery management function to battery pack.
Schematic diagram is as shown in Figure 2 inside the battery combiner.Every group of battery pack by main D.C. contactor (K1-K4) andFuse (FU1-FU4) connects together, then in parallel with DC power supply device.Control unit can individually control every group of batteryThe main D.C. contactor closure of group, realizes DC power supply device to the battery management function or battery power discharge function of battery packEnergy.In two groups of battery pack handoff procedures, in order to avoid as there are the voltage differences impact caused by battery pack of two groups of battery packs,What every group of battery pack also configured by-pass unit；The by-pass unit includes: D.C. contactor (K5-K8) and counnter attack diode(D1-D4)；The D.C. contactor K5 connects with the counnter attack diode D1；The D.C. contactor K6 and two pole of counnter attackPipe D2 series connection；The D.C. contactor K7 connects with the counnter attack diode D3；The D.C. contactor K8 and the counnter attack twoPole pipe D4 series connection.Described control unit starts battery pack by-pass unit, disconnects main connection unit when battery pack switches；Work as sideRoad unit D.C. contactor closure, when the main D.C. contactor of main connection unit disconnects, due to the unilateal conduction of counnter attack diodeCharacteristic, it is ensured that online battery pack can only discharge to DC power supply device, and DC power supply device or other battery packs cannotIt charges to online battery pack, it is therefore prevented that since voltage difference causes to impact to battery.
As shown in figure 3, for the present invention provides a kind of DC power system, which includes: battery combiner；The batteryCombiner includes: control unit, at least main connection unit of two-way and at least two-way by-pass unit；
Described control unit, for being communicated with DC power supply device, according to the demand of the DC power supply device, controlMake the conducting and disconnection of the main connection unit and the by-pass unit；
The main connection unit, for the instruction according to described control unit, conducting is in parallel with the DC power supply device,Or it disconnects in parallel with the DC power supply device；
The by-pass unit is parallel to the main connection unit both ends, in battery pack switching, the main connection to be singleMember disconnects, and according to the instruction of described control unit, starting discharges to the DC power supply device, the DC power supply device orThe battery pack cannot charge to the battery pack.
Wherein, the main connection unit, comprising: main D.C. contactor；Described main D.C. contactor one end and the batteryGroup is connected, and the other end is connected with the DC power supply device.
Wherein, the main connection unit, further includes: fuse；
Described fuse one end is connected with described main D.C. contactor one end, the other end and the DC power supply device phaseEven.
Wherein, the by-pass unit, comprising: D.C. contactor and counnter attack diode；
The D.C. contactor is connected with the counnter attack diode；The D.C. contactor of the connection and two pole of counnter attackThe parallel connection of pipe both ends and the main connection unit both ends.
Wherein, when battery pack is four groups, when the main connection unit is with tetra- tunnel by-pass unit Dou Wei, the battery packIt include: battery pack 1, battery pack 2, battery pack 3 and battery pack 4；The main connection unit includes: the first main connection unit, and secondMain connection unit, the main connection unit of third, the 4th main connection unit；Wherein, the described first main connection unit includes: first main straightFlow contactor K1, first fuse FU1；The second main connection unit includes: the second main D.C. contactor K2, second fuseFU2；The main connection unit of third includes: the main D.C. contactor K3 of third, third fuse FU3；The 4th main connection is singleMember includes: the 4th main D.C. contactor K4, the 4th fuse FU4；The by-pass unit includes: the first by-pass unit, by the of secondRoad unit, third by-pass unit and the 4th by-pass unit；Wherein, first by-pass unit includes: the first D.C. contactor K5With the first counnter attack diode D1；Second by-pass unit includes: the second D.C. contactor K6 and the second counnter attack diode D2；InstituteStating third by-pass unit includes: third D.C. contactor K7 and third counnter attack diode D3；4th by-pass unit includes:Four D.C. contactor K8 and the 4th counnter attack diode D4；
Described first one end main D.C. contactor K1 is connected with the battery pack 1, the other end and the first fuse FU1One end is connected；The first main D.C. contactor K1 conducting is controlled with disconnection by described control unit；The first fuse FU1Another termination DC power supply device；
Described one end first D.C. contactor K5 is connect with the first counnter attack diode D1 positive terminal, first direct currentAnother termination of contactor K5 first fuse FU1 and the described first connecting pin main D.C. contactor K1；First counnter attackDiode D1 cathode terminates the battery pack 1 and the described first connecting pin main D.C. contactor K1；
Described second one end main D.C. contactor K2 is connected with the battery pack 2, the other end and the second fuse FU2One end is connected；The second main D.C. contactor K2 conducting is controlled with disconnection by described control unit；The second fuse FU2Another termination DC power supply device；
Described one end second D.C. contactor K6 is connect with the second counnter attack diode D2 positive terminal, second direct currentAnother termination of contactor K6 second fuse FU2 and the described second connecting pin main D.C. contactor K2；Second counnter attackDiode D2 cathode terminates the battery pack 2 and the described second connecting pin main D.C. contactor K2；
Described third one end main D.C. contactor K3 is connected with the battery pack 3, the other end and the third fuse FU3One end is connected；The main D.C. contactor K3 conducting of third is controlled with disconnection by described control unit；The third fuse FU3Another termination DC power supply device；
Described one end third D.C. contactor K7 is connect with the third counnter attack diode D3 positive terminal, the third direct currentAnother termination of contactor K7 third fuse FU3 and the connecting pin the third main D.C. contactor K3；The third counnter attackDiode D3 cathode terminates the battery pack 3 and the connecting pin the third main D.C. contactor K3；
Described 4th one end main D.C. contactor K4 is connected with the battery pack 4, the other end and the 4th fuse FU4One end is connected；The 4th main D.C. contactor K4 conducting is controlled with disconnection by described control unit；The 4th fuse FU4Another termination DC power supply device；
Described 4th one end D.C. contactor K8 is connect with the 4th counnter attack diode D4 positive terminal, the 4th direct currentAnother termination of contactor K8 the 4th fuse FU4 and the connecting pin the 4th main D.C. contactor K4；4th counnter attackDiode D4 cathode terminates the battery pack 4 and the connecting pin the 4th main D.C. contactor K4.
It needs to increase the beneficial effects of the present invention are: efficiently solving user in equipment dilatation using technical solution of the present inventionAdd battery capacity, and the problem of existing battery pack buys new large-capacity battery pack again must not be changed without, makes full use ofExisting resource battery pack resource saves the cost of replacement battery pack.The not simple battery pack of the present invention is in parallel, leads toControl of the control unit to main connection unit and by-pass unit is crossed, and is communicated with DC power supply device, is realized to every group of electricityThe individual battery management of pond group realizes effective maintenance and protection to battery pack, extends battery pack service life, effectively anti-Only voltge surge battery pack in battery pack handoff procedure.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is allAny modification, equivalent replacement, improvement and so within the spirit and principles in the present invention, are all contained in protection scope of the present inventionIt is interior.