Background technology
The automobile-used lithium-ions battery of traditional electric bicycle and electric motorcycle is that battery management system (Battery Management system is called for short BMS) and battery pack are placed on an airtight battery case the inside.
But, upgrading along with present battery of electric motor car industry, not only the speed changed by lithium ion battery of lead-acid battery is being accelerated, and the specification of changing does not wait from 10ah to 50ah to high voltage 72V, capacity from low-voltage 48V, cause battery bulky, can not be placed on a fixing place, must disperse to place.Such as under the pedal, under the seat and afterbody.
And what batteries traditional lithium ion battery group system by variations such as sample line monitoring cell voltages, has; how many root sample lines are just arranged; along with the electric motorcycle voltage increases, battery series connection quantity increases, and sample line can be up to 30 (90V); simultaneously; when sample line connects battery pack, and must according to from low-voltage to high-tension sequence arrangement, if the sample line of low-voltage is received on the high-tension battery pack; can burn baffle, cause battery pack not use.Because wiring quantity is many, the as easy as rolling off a log mistaken order of the order of connection, when installation, replacing battery module, the probability that burns baffle emerges in an endless stream.
The utility model content
The utility model first purpose is to provide a kind of lithium ion battery group system, in the more practical safety of this system, and connects safety more flexibly.
A kind of lithium ion battery group system that the utility model embodiment provides comprises: at least two battery modules, at least two equalizing circuit plates, a baffle;
Each described battery module is composed in series by at least two lithium-ion battery monomers,
Each described battery module also is electrically connected with an equalizing circuit plate respectively, described equalizing circuit plate is used for detecting the voltage of each monomer of battery module that is connected with this equalizing circuit plate, according to the capacity of each cell in the described battery module of the electric voltage equalization of each monomer;
Each described equalizing circuit plate is electrically connected with the switch control module of described baffle by signal bus,
The electrode of each described battery module is connected in series by conductor wire and described baffle,
The switch control module of described baffle is used for controlling according to the switching signal of described signal bus input the output break-make of described power supply signal.
Alternatively, the balance module that described each battery module and this battery module connect is separately positioned on the immobilization carrier, and described immobilization carrier is provided with input winding displacement interface, output winding displacement interface;
Described input winding displacement interface, output winding displacement interface comprise conductor terminal and bus terminal respectively, the out-put supply of the battery module in described conductor terminal and this solid carrier is connected in series, and the interior balance module bus of described bus terminal and this solid carrier is electrically connected;
Described baffle is provided with and described input winding displacement interface, the adaptive socket interface of output winding displacement interface;
Described each equalizing circuit plate is electrically connected with the switch control module of described baffle by signal bus, and described each battery module is by being connected in series of conductor wire and described baffle, specifically:
Each described immobilization carrier is connected to the socket interface on the described baffle by described input winding displacement interface, output winding displacement interface serial connection.
Alternatively, each described battery module is composed in series by 4 lithium-ion battery monomers.
Alternatively, described signal bus is for to be served as by a holding wire.
Alternatively, described signal bus is for to be served as by two holding wires.
Alternatively, described switch control module is the MOSET switch chip.
Alternatively, described signal bus is electrically connected with the triggering pin of the switch control module of described baffle.
Therefore, the technical scheme of application the utility model embodiment,
Embodiment
Describe the utility model in detail below in conjunction with accompanying drawing and specific embodiment, be used for explaining the utility model in this illustrative examples of the present utility model and explanation, but not as to qualification of the present utility model.
Embodiment 1:
The structural representation of a kind of lithium ion battery group system that Fig. 1 provides for the utility model embodiment.In the drawings, D-representative discharge negative pole, C-representative charging negative pole.
Referring to shown in Figure 1, native system comprises at least two battery modules 103, at least two equalizing circuit plates 104, a baffle 105.Wherein annexation is mainly as follows:
Each battery module 103 is composed in series by at least two lithium-ion battery monomers, each battery module 103 also is electrically connected with an equalizing circuit plate 104 respectively, each equalizing circuit plate 104 is by sampling to the voltage of each battery in the battery module 103, determine the capacity status of each battery, whether monitoring overcharges, crosses and put, and carries out equilibrium control according to monitoring in this battery module 103.
Each equalizing circuit plate 104 is electrically connected with the switch control module of baffle 105 by signal bus 102.
The electrode of each battery module 103 is connected in series by conductor wire 101 and baffle 105, and the switch control module of baffle 105 is used for the output break-make according to the switching signal control power supply signal of signal bus 102 inputs.
Therefore, because in the present embodiment technical scheme, because in the present embodiment with a plurality of (3,4,5 or more) lithium ion single is combined into a battery module 103, each battery module 103 is formed a little battery pack respectively, be connected with an equalizing circuit plate 104 respectively, this equalizing circuit plate 104 is sampled to the voltage of each battery cell by the sample line that is connected with this battery module 103, and according to this battery module 103 is carried out equilibrium, guaranteed that the high voltage sample line all concentrates near each battery module 103, avoids many sample line in the prior art, the mixed and disorderly problem of the oversize wiring that brings of sample line; In addition, also can avoid in the prior art voltage sampling signal monitoring is arranged on the baffle 105 and the problem of burning baffle 105.
In addition, owing to adopt the modularization in the present embodiment, the technical scheme of high-and low-voltage circuit separate design, people can carry out separate design to battery pack system according to actual needs, and can be so that connecting line lacks simple less.Be convenient for people to carry out distributed design at any time according to actual needs.
In addition, in the present embodiment, the holding wire of bus only transmits and overcharges, cross and switching signal such as put, and voltage sampling partly is placed on the equalizing circuit plate 104 of each battery module 103 correspondence, so do not exist high voltage to receive the risk of low voltage component on baffle 105.
Because the balance module of each battery module 103 correspondence adopts signal bus 102 to be connected with baffle 105; rather than as in the prior art each holding wire being connected in series in baffle 105 plates; avoided holding wire to connect inflexible problem, the problem of particularly having avoided prior art to cause burning plate owing to the holding wire wrong.Because its holding wire adopts bus to connect, insert so can carry out bus in practice comparatively flexibly in the present embodiment, wiring inserts simpler.
Because above-mentioned effect, this enforcement the electrokinetic cell group system also be specially adapted to the application of power electric cars such as motorcycle.
Battery module 103 in a kind of lithium ion battery that Fig. 2 provides for present embodiment, with and corresponding balance module load structural representation on the immobilization carrier, in the present embodiment this immobilization carrier can but be not limited to a metal cabinet.
Referring to shown in Figure 2, be respectively arranged with input winding displacement interface 201, output winding displacement interface 202 on this metal cabinet 200.Wherein should input winding displacement interface 201, output winding displacement interface 202 can be various adaptive connectors of the prior art, such as can but be not limited to the buckle-type connector, also can be the male and female formula joint of other patterns.
For each metal cabinet 200, its input winding displacement interface 201, output winding displacement interface 202 comprise conductor terminal and bus terminal respectively, the out-put supply of the battery module 103 in conductor terminal and this solid carrier is connected in series, power output end as battery, balance module bus in bus terminal and this solid carrier is electrically connected, as the signal terminal of transmitting switch signal.
Correspondingly, on baffle 105, also be provided with metal cabinet 200 on the adaptive socket interface (not drawing among the figure) of input winding displacement interface 201, output winding displacement interface 202.
When connecting the battery pack system of present embodiment; each input winding displacement interface 201, output winding displacement interface 202 that the metal cabinet 200 of battery module 103, equalizing circuit plate 104 has been installed is cascaded, and after the series connection it is connected to from beginning to end the socket interface on the baffle 105.
Adopt further modularization shown in Figure 2, connector connected mode further the aspect people connect flexibly, avoid the circuit misconnection and bring infringement to battery pack system.
Need to prove; in the present embodiment; each equalizing circuit plate 104 is mainly under-voltage switching signal, overpressure switch signal to the signal between the baffle 105; these switch controlling signals are linked into the triggering pin of switch control module on the baffle 105; switch control module is controlled the external power supply of this battery pack system according to the triggering of these signals and is supplied with break-make, realizes switch control.
In the present embodiment, this switch control module can but be not limited to the MOSET switch chip.
More than technical scheme that the utility model embodiment is provided be described in detail, used specific case herein principle and the execution mode of the utility model embodiment are set forth, the explanation of above embodiment only is applicable to the principle that helps to understand the utility model embodiment; Simultaneously, for one of ordinary skill in the art, according to the utility model embodiment, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as restriction of the present utility model.