CN105826958A - Balancing device for battery protection system and battery protection system - Google Patents
Balancing device for battery protection system and battery protection system Download PDFInfo
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- CN105826958A CN105826958A CN201510011349.XA CN201510011349A CN105826958A CN 105826958 A CN105826958 A CN 105826958A CN 201510011349 A CN201510011349 A CN 201510011349A CN 105826958 A CN105826958 A CN 105826958A
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Abstract
In a balancing device for a battery protection system disclosed by the invention, when a switch unit comprises a triode, the output control end of a control module and the output control end of a balancing chip are disconnected, the output control end of a processing module is connected with the output control end of the balancing chip, the processing module controls conduction and cutoff of the triode through the control end of the switch unit according to an inputted control signal, and the grounding end is connected with the output control end of the processing module. When the switch unit comprises an MOS transistor, the output control end of the control module is connected with the output control end of the balancing chip, and the control module controls conduction and cutoff of the MOS transistor through the control end of the switch unit according to the inputted control signal. In the above balancing device, when the switch unit comprises the triode, current flowing to the balancing chip flows to the ground end, the balancing device can work under time sharing sampling and real-time sampling, and the balancing device is applied to a balancing mode for a driving MOS transistor type and a driving triode type. The invention also discloses a battery protection system.
Description
Technical field
The present invention relates to battery protection technical field, particularly to a kind of bascule for battery protection system and a kind of battery protection system.
Background technology
In multiple batteries protection field, in order to extend the service life of set of cells, improve the utilization rate of battery capacity, in battery protection system, often add bascule, make whole set of cells core capacity as far as possible balance in charge and discharge process of respectively economizing on electricity consistent.The principle of the one way in which realizing balance at present is to be discharged by discharge loop by high-voltage battery, unnecessary electricity is lost with the form of heat energy, it is achieved the balance of each batteries, it is achieved method is relatively easy.
At present, this balance mode can be divided into driving metal-oxide-semiconductor type from discharge control loop and drive triode-type.The advantage of the bascule of driving metal-oxide-semiconductor type is: balance is that voltage drives when starting, it is not necessary to driving electric current, therefore sample chip without impact, and be simultaneously suitable for real-time sampling and time sharing sampling, range of application is wider；Its shortcoming is: in overall applicability scheme, and relative to audion, metal-oxide-semiconductor GS is easier to damaged, causes balanced loop to be lost efficacy, and even damages battery.
The advantage of the bascule of driving triode-type is: for comparing metal-oxide-semiconductor, stablize, it is not easy to damage；Its shortcoming is: when bascule works, and has electric current and flows into chip, causes chip sampling inaccurate after sampling resistor, therefore cannot function as real-time sampling to use, it is only limitted in time sharing sampling scheme, i.e. samples when balance is not turned on, and do not sample when balancing unlatching.Time sharing sampling then causes battery equilibrium efficiency to be substantially reduced, and affects balancing speed.
Summary of the invention
It is contemplated that at least solve one of technical problem present in prior art.To this end, the present invention needs to provide a kind of bascule for battery protection system and a kind of battery protection system.
A kind of bascule for battery protection system, including balance chip and switch element, this balance chip includes control module and processing module, and this switch element includes audion or metal-oxide-semiconductor, and this processing module includes earth terminal；
The input of this control module controls the control end that inputs of end and this processing module and is all connected with the input control end of this balance chip; first outfan of this control module connects the first outfan of this balance chip; second outfan of this control module connects the second outfan of this balance chip, and the first outfan of this balance chip and the second outfan are for connecting two poles of protected battery respectively；
The output control terminal of this balance chip connects the control end of this switch element, and the first end of this switch element connects the first outfan of this balance chip, and the second end of this switch element connects the second outfan of this balance chip；
When this switch element includes this audion, the output control terminal of this control module disconnects with the output control terminal of this balance chip, the output control terminal of this processing module connects the output control terminal of this balance chip, this processing module controls conducting and the shutoff of this audion according to the control signal of input by the end that controls of this switch element, and this earth terminal connects the output control terminal of this processing module；
When this switch element includes this metal-oxide-semiconductor, the output control terminal of this control module connects the output control terminal of this balance chip, and this control module controls conducting and the shutoff of this metal-oxide-semiconductor according to the control signal of this input by the end that controls of this switch element.
Above-mentioned bascule, when switch element includes audion, the electric current flowing into balance chip through balancing the output control terminal of chip can be held by the output control terminal of processing module and earth terminal with flowing to, this makes bascule in the case of can be used in time sharing sampling, also can be suitably used for real-time sampling, thus improve battery equilibrium efficiency, it is ensured that balancing speed.Further, above-mentioned bascule is applicable to drive metal-oxide-semiconductor type and drive the balance mode of triode-type, and range of application is wider.
In one embodiment, this balance chip includes the first connector and the second connector；
This first connector is between the output control terminal and the output control terminal of this balance chip of this control module, and this second connector is between the selection end and this earth terminal of this processing module；
When this switch element includes this audion, this first connector disconnects the connection of the output control terminal of this control module and the output control terminal of this balance chip, and this second connector disconnects the connection of this selection end and this earth terminal；
When this switch element includes this metal-oxide-semiconductor, this first connector connects the output control terminal of this control module and the output control terminal of this balance chip, and this second connector connects this selection end and this earth terminal.
In one embodiment, this control module includes metal-oxide-semiconductor M1 and metal-oxide-semiconductor M2, the grid end of metal-oxide-semiconductor M1 and the grid end of metal-oxide-semiconductor M2 are all connected with the input of this control module and control end, the drain terminal of the drain terminal of metal-oxide-semiconductor M1 and metal-oxide-semiconductor M2 is all connected with the output control terminal of this control module, the source of metal-oxide-semiconductor M1 connects the first outfan of this control module, and the source of metal-oxide-semiconductor M2 connects the second outfan of this control module.
In one embodiment, this processing module includes metal-oxide-semiconductor M3, M4, M5, M6 and constant-current source Idd；
The grid end of metal-oxide-semiconductor M3 connects the input of this processing module and controls end, and the drain terminal of metal-oxide-semiconductor M3 connects the output control terminal of this processing module, and the source of metal-oxide-semiconductor M3 connects the drain terminal of metal-oxide-semiconductor M4；
The grid end of metal-oxide-semiconductor M4 connects this selection end, and the source of metal-oxide-semiconductor M4 connects this earth terminal；
The drain terminal of metal-oxide-semiconductor M5 connects this selection end, the source of the source of metal-oxide-semiconductor M5 and metal-oxide-semiconductor M6 is all connected with the power end of this processing module, the grid end of metal-oxide-semiconductor M5 and the grid end of metal-oxide-semiconductor M6 are all connected with one end of constant-current source Idd, and the drain terminal of metal-oxide-semiconductor M6 connects one end of constant-current source Idd；
The other end of constant-current source Idd connects this earth terminal.
In one embodiment, this bascule also includes resistance Ra, R2 and R3, and this switch element includes metal-oxide-semiconductor MB, and the first outfan of this balance chip connects one end of resistance R3, and the other end of resistance R3 connects the drain terminal of metal-oxide-semiconductor MB；
The output control terminal of this balance chip connects the grid end of metal-oxide-semiconductor MB, and the source of metal-oxide-semiconductor MB connects one end of resistance Ra, and the other end of resistance Ra connects one end of resistance R2, and the other end of resistance R2 connects the second outfan of this balance chip.
In one embodiment, this bascule also includes resistance Ra, R2, R3 and Rb, and this switch element includes audion QB, and the first outfan of this balance chip connects one end of resistance R3, the emitter stage of the other end connecting triode QB of resistance R3；
The output control terminal of this balance chip connects one end of resistance Ra through the base stage of resistance Rb connecting triode QB, the colelctor electrode of audion QB, and the other end of resistance Ra connects one end of resistance R2, and the other end of resistance R2 connects the second outfan of this balance chip.
In one embodiment, this bascule also includes output module, the output control terminal of this control module connects the first input end of this output module, the output control terminal of this processing module connects the second input of this output module, and the output control terminal of this output module connects the output control terminal of this balance chip.
A kind of battery protection system, including multiple bascules and multiple battery.Each bascule includes balancing chip and switch element, and this balance chip includes control module and processing module, and this switch element includes audion or metal-oxide-semiconductor, and this processing module includes earth terminal；
The input of this control module controls the control end that inputs of end and this processing module and is all connected with the input control end of this balance chip, first outfan of this control module connects the first outfan of this balance chip, second outfan of this control module connects the second outfan of this balance chip, and the first outfan of this balance chip and the second outfan are for being respectively connecting to two poles of a few battery；
The output control terminal of this balance chip connects the control end of this switch element, and the first end of this switch element connects the first outfan of this balance chip, and the second end of this switch element connects the second outfan of this balance chip；
When this switch element includes this audion, the output control terminal of this control module disconnects with the output control terminal of this balance chip, the output control terminal of this processing module connects the output control terminal of this balance chip, this processing module controls conducting and the shutoff of this audion according to the control signal of input by the end that controls of this switch element, and this earth terminal connects the output control terminal of this processing module；
When this switch element includes this metal-oxide-semiconductor, the output control terminal of this control module connects the output control terminal of this balance chip, and this control module controls conducting and the shutoff of this metal-oxide-semiconductor according to the control signal of this input by the end that controls of this switch element.
In one embodiment, this balance chip includes the first connector and the second connector；
This first connector is between the output control terminal and the output control terminal of this balance chip of this control module, and this second connector is between the selection end and this earth terminal of this processing module；
When this switch element includes this audion, this first connector disconnects the connection of the output control terminal of this control module and the output control terminal of this balance chip, and this second connector disconnects the connection of this selection end and this earth terminal；
When this switch element includes this metal-oxide-semiconductor, this first connector connects the output control terminal of this control module and the output control terminal of this balance chip, and this second connector connects this selection end and this earth terminal.
A kind of bascule for battery protection system, including balance chip and switch element, this balance chip includes control module and processing module, and this switch element includes audion, and this processing module includes earth terminal；
The input of this control module controls the control end that inputs of end and this processing module and is all connected with the input control end of this balance chip; first outfan of this control module connects the first outfan of this balance chip; second outfan of this control module connects the second outfan of this balance chip, and the first outfan of this balance chip and the second outfan are for connecting two poles of protected battery respectively；
The base stage of this audion and emitter stage are all connected with the first outfan of this balance chip, and the colelctor electrode of this audion connects the second outfan of this balance chip；
The output control terminal of this processing module connects the first outfan of this balance chip, and this processing module controls conducting and the shutoff of this audion according to the control signal of input, and this earth terminal connects the output control terminal of this processing module.
The additional aspect of the present invention and advantage will part be given in the following description, and part will become apparent from the description below, or is recognized by the practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage will be apparent from easy to understand, wherein from combining the accompanying drawings below description to embodiment:
Fig. 1 is the module diagram of the bascule for battery protection system of better embodiment of the present invention；
Fig. 2 is the circuit diagram of the bascule for battery protection system of better embodiment of the present invention；
Fig. 3 is another circuit diagram of the bascule for battery protection system of better embodiment of the present invention；
Fig. 4 is the another circuit diagram of the bascule for battery protection system of better embodiment of the present invention；
Fig. 5 is another module diagram of the bascule for battery protection system of better embodiment of the present invention；And
Fig. 6 is the circuit diagram of the battery protection system of better embodiment of the present invention.
Detailed description of the invention
Embodiments of the present invention are described below in detail, and the example of described embodiment is shown in the drawings, and the most same or similar label represents same or similar element or has the element of same or like function.The embodiment described below with reference to accompanying drawing is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention, it is to be understood that term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or implicitly include one or more described features.In describing the invention, " multiple " are meant that two or more, unless otherwise expressly limited specifically.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " is installed ", " being connected ", " connection " should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or be integrally connected；Can be to be mechanically connected, it is also possible to be to electrically connect maybe can be in communication with each other；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be connection or the interaction relationship of two elements of two element internals.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
Following disclosure provides many different embodiments or example for realizing the different structure of the present invention.In order to simplify disclosure of the invention, hereinafter to the parts of specific examples be set for describing.Certainly, they are the most merely illustrative, and are not intended to limit the present invention.Additionally, the present invention can in different examples repeat reference numerals and/or reference letter, this repetition is for purposes of simplicity and clarity, itself does not indicate the relation between discussed various embodiment and/or setting.Additionally, the various specific technique that the invention provides and the example of material, but those of ordinary skill in the art are it can be appreciated that the application of other techniques and/or the use of other materials.
Referring to Fig. 1, the bascule 100 for battery protection system of better embodiment of the present invention includes balancing chip 102 and switch element 104.In the present embodiment, this bascule 100 has independent balance control terminal BALX.
This balance chip 102 includes control module 51 and processing module 52, and this switch element 104 includes audion or metal-oxide-semiconductor, and this processing module 52 includes that earth terminal GND and power end POWER, this power end POWER are for connecting the internal electric source of balance chip.
The input of this control module 51 controls the control end C1 that inputs of end A1 and this processing module 52 and is all connected with the input control end 106 of this balance chip 102; first output terminals A 2 of this control module 51 connects the first outfan V1 of this balance chip 102; second output terminals A 3 of this control module 51 connects the second outfan V2 of this balance chip 102; the first outfan V1 and the second outfan V2 of this balance chip 102 is for connecting two pole V (X+1), the VX of protected battery BX respectively; such as pole V (X+1) is the positive pole of battery, and VX is the negative pole of battery.
The output control terminal BALX of this balance chip 102 connects the control end D of this switch element 104, first end E1 of this switch element 104 connects the first outfan V1 of this balance chip 102, and the second end E2 of this switch element 104 connects the second outfan V2 of this balance chip 102.
When this switch element 104 includes audion (this bascule 100 is the bascule driving triode-type), the output control terminal A4 of this control module 51 disconnects with the output control terminal BALX of this balance chip 102, the output control terminal C2 of this processing module 52 connects the output control terminal BALX of this balance chip 102, this processing module 52 controls conducting and the shutoff of this audion according to control signal CTX_N of this input by the control end D of this switch element 104, and this earth terminal GND connects the output control terminal C2 of this processing module 52.Input control signal CTX_N e.g. through amplifier amplify after control signal.
When this switch element 104 includes metal-oxide-semiconductor (this bascule 100 is the bascule driving metal-oxide-semiconductor type), the output control terminal A4 of this control module 51 connects the output control terminal BALX of this balance chip 102, and this control module 51 controls conducting and the shutoff of this metal-oxide-semiconductor according to control signal CTX_N inputted by the control end D of this switch element 104.
Specifically, this balance chip 102 includes the first connector F1 and the second connector F2.This first connector F1 is between the output control terminal A4 and the output control terminal BALX of this balance chip 102 of this control module 51, and this second connector F2 is between the selection end C3 and this earth terminal GND of this processing module 52.
The first situation and switch element 104 when including audion with regard to switch element 104 individually below include that the second situation of metal-oxide-semiconductor is described separately.
Switch element 104 includes the first situation during audion QB:
Incorporated by reference to Fig. 2, in this case, this first connector F1 disconnects the connection of the output control terminal A4 of this control module 51 and the output control terminal BALX of this balance chip 102, and this second connector F2 disconnects the connection of this selection end C3 and this earth terminal GND.Such as, in one embodiment, the first connector F1 is the first fuse, and the second connector F2 is the second fuse.When disconnecting, the first fuse F1 and the second fuse F2 all repaiies disconnected.Now, the output control terminal A4 of control module 51 and the output control terminal BALX onrelevant of balance chip 102, balance the output control terminal BALX output of chip 102 by the output output control of processing module 52.
It is appreciated that, in other embodiments, the most optional other type of connector of bascule 100, as long as being capable of connection and the disconnection of the output control terminal A4 of this control module 51 and the output control terminal BALX of this balance chip 102, and realize the connection of this selection end C3 and this earth terminal GND and disconnect.
Specifically, this control module 51 includes metal-oxide-semiconductor M1 and metal-oxide-semiconductor M2, the grid end of metal-oxide-semiconductor M1 and the grid end of metal-oxide-semiconductor M2 are all connected with the input of this control module 51 and control end A1, the drain terminal of the drain terminal of metal-oxide-semiconductor M1 and metal-oxide-semiconductor M2 is all connected with the output control terminal A4 of this control module 51, the source of metal-oxide-semiconductor M1 connects the first output terminals A 2 of this control module 51, and the source of metal-oxide-semiconductor M2 connects the second output terminals A 3 of this control module 51.
This processing module 52 includes metal-oxide-semiconductor M3, M4, M5, M6 and constant-current source Idd.
The grid end of metal-oxide-semiconductor M3 connects the input of this processing module 52 and controls end C1, and the drain terminal of metal-oxide-semiconductor M3 connects the output control terminal C2 of this processing module 52, and the source of metal-oxide-semiconductor M3 connects the drain terminal of metal-oxide-semiconductor M4.
The grid end of metal-oxide-semiconductor M4 connects this selection end C3, and the source of metal-oxide-semiconductor M4 connects this earth terminal GND.
The drain terminal of metal-oxide-semiconductor M5 connects this selection end C3, the source of the source of metal-oxide-semiconductor M5 and metal-oxide-semiconductor M6 is all connected with the power end POWER of this processing module 52, the grid end of metal-oxide-semiconductor M5 and the grid end of metal-oxide-semiconductor M6 are all connected with one end of constant-current source Idd, and the drain terminal of metal-oxide-semiconductor M6 connects one end of constant-current source Idd.The other end of constant-current source Idd connects this earth terminal GND.
This bascule 100 also includes resistance Ra, R2, R3 and Rb, and this switch element 104 includes audion QB, and the first outfan V1 of this balance chip 102 connects one end of resistance R3, the emitter stage of the other end connecting triode QB of resistance R3.
The output control terminal BALX of this balance chip 102 is through the base stage of resistance Rb connecting triode QB, the colelctor electrode of audion QB connects one end of resistance Ra, the other end of resistance Ra connects one end of resistance R2, and the other end of resistance R2 connects the second outfan V2 of this balance chip 102.The emitter stage of audion QB and colelctor electrode connect two poles of protected battery BX respectively.
The output of balance chip 102 controls as triode-type.During work, CTX_N is internal balance initial control signal, and control module 51 exports for CMOS, and metal-oxide-semiconductor M1 is PMOS, and metal-oxide-semiconductor M2 is NMOS tube.The output control terminal A4 of control module 51 is connected with the output control terminal BALX of balance chip 102.First connector F1 disconnects.The output control terminal BALX of balance chip 102 is directly connected to the drain terminal of metal-oxide-semiconductor M3, the drain terminal of metal-oxide-semiconductor M4 is connected with the source of metal-oxide-semiconductor M3, the second connector F2 that the grid end of metal-oxide-semiconductor M4 connects disconnects, metal-oxide-semiconductor M4 is connected only to the drain terminal of a mirror-image constant flow source metal-oxide-semiconductor M5, constant-current source Idd is the constant-current source produced, therefore the grid end of metal-oxide-semiconductor M4 becomes high level, and metal-oxide-semiconductor M4 turns on.
When control signal CTX_N of input is low level (GND), control module 51 is output as high level V3, but owing to the first connector F1 disconnects, the output control terminal A4 of the control module 51 and output control terminal BALX balancing chip 102 is without being connected.Second connector F2 disconnects, and the grid end of metal-oxide-semiconductor M4 is high level, and metal-oxide-semiconductor M4 turns on.Control signal CTX_N of input is low level, metal-oxide-semiconductor M3 turns off, metal-oxide-semiconductor M3 is output as high-impedance state, the i.e. output control terminal BALX of balance chip 102 is output as high-impedance state, then in the external balance loop of balance chip 102, the base stage of audion QB flows through with launching interpolar no current, audion QB cannot turn on, and balanced loop is not turned on.
When control signal CTX_N of input becomes high level V3, control module 51 is output as low level V2, but owing to the first connector F1 disconnects, the output control terminal A4 of the control module 102 and output control terminal BALX balancing chip 102 is without being connected.Controlling metal-oxide-semiconductor M3 conducting when control signal CTX_N of input is high level, the second connector F2 disconnection makes the grid end of metal-oxide-semiconductor M4 be mirrored constant-current source M5 and is pulled to high level POWER voltage, and metal-oxide-semiconductor M4 turns on.After then the base stage of the audion QB that the output control terminal BALX of balance chip 102 controls passes through output control terminal BALX, the output control terminal C2 of processing module 52, metal-oxide-semiconductor M3, M4 with the electric current Ibe launching interpolar, the earth terminal GND through processing module 52 flows into ground.Meanwhile, audion QB turns on, and external balance loop is opened.
Switch element 104 includes the second situation during metal-oxide-semiconductor MB:
Incorporated by reference to Fig. 3, in this case, the physical circuit of bascule 100 constitutes essentially identical with the physical circuit of the bascule 100 of the first situation composition.Difference is, this switch element 104 includes that metal-oxide-semiconductor MB, bascule 100 eliminate resistance Rb.The output control terminal BALX of balance chip 102 is directly connected to the grid end of metal-oxide-semiconductor MB.The other end of resistance R3 connects the drain terminal of metal-oxide-semiconductor MB.The source of metal-oxide-semiconductor MB connects one end of resistance Ra.
This first connector F1 connects the output control terminal A4 of this control module 51 and output control terminal BALX of this balance chip 102, this second connector F2 and connects this selection end C3 and this earth terminal GND.Such as, in one embodiment, the first connector F1 is the first fuse, and the second connector F2 is the second fuse.During connection, the first fuse F1 and the second fuse F2 does not the most repair disconnected.The now output control terminal BALX output of balance chip 102 is directly driven by control module 51, and processing module 52 is controlled by the second fuse F2 so that processing module 52 is output as high-impedance state, does not affect the output of balance chip 102.
The output of balance chip 102 controls as metal-oxide-semiconductor type.During work, CTX_N is internal balance initial control signal, and control module 51 exports for CMOS.Metal-oxide-semiconductor M1 is PMOS, and metal-oxide-semiconductor M2 is NMOS tube.The output control terminal A4 of control module 51 is directly connected to balance the output control terminal BALX of chip 102 by the first connector F1, and is directly connected to the drain terminal of metal-oxide-semiconductor M3.The drain terminal of metal-oxide-semiconductor M4 is connected with the source of metal-oxide-semiconductor M3.The grid end of metal-oxide-semiconductor M4 is connected to earth terminal GND by the second connector F2, and the grid end of metal-oxide-semiconductor M4 is also connected to the drain terminal of mirror-image constant flow source M5 simultaneously.Constant-current source Idd is the constant-current source produced.First connector F1 and the second connector F2 does not all turn off, and keeps connecting.So when control signal CTX_N of input is high level V3, the output control terminal A4 of control module 51 is low level V2 to the output control terminal BALX of balance chip 102, the second connector F2 controls the grid end of metal-oxide-semiconductor M4 and is connected to earth terminal GND, metal-oxide-semiconductor M4 shutoff.Metal-oxide-semiconductor M3 exports high-impedance state.Therefore the output control terminal BALX of balance chip 102 is not turned on by output control terminal A4 control output low level balance control NMOS tube MB of control module 51, and balanced loop is not turned on.
When control signal CTX_N of input becomes low level GND, the output control terminal A4 of control module 51 exports the output control terminal BALX of balance chip 102 and becomes high level V3, simultaneously, second connector F2 controls the grid end of metal-oxide-semiconductor M4 and is connected to earth terminal GND, metal-oxide-semiconductor M4 turns off, and metal-oxide-semiconductor M3 exports high-impedance state.The output control terminal BALX of balance chip 102 is controlled to export high level V3 by control module 51, and external balance three pipe NMOS tube MB is opened, and balanced loop is opened.
In sum, above-mentioned bascule 100, when its switch element 104 includes audion QB, the electric current Ibe flowing into balance chip 102 through the output control terminal BALX of balance chip 102 can be held by the output control terminal C2 and earth terminal GND of processing module 52 with flowing to, this makes bascule 100 in the case of can be used in time sharing sampling, also can be suitably used for real-time sampling, thus improve battery equilibrium efficiency, it is ensured that balancing speed.Meanwhile, when switch element 104 includes metal-oxide-semiconductor, above-mentioned bascule 100 also can realize the equilibrium function of battery.Therefore, above-mentioned bascule 100 is equally applicable to drive the balance mode of metal-oxide-semiconductor type, and range of application is wider.
Please join Fig. 4, better embodiment of the present invention provides a kind of bascule 200 for battery protection system.This bascule 200 and the bascule 100 of embodiment of above are essentially identical in the case of switch element includes audion, and its difference is, balance chip 202 eliminates independent balance control terminal BALX.Processing module 52 controls conducting and the shutoff of this audion QC according to control signal CTX_N of input.
Specifically, the base stage of the audion QC of switch element and emitter stage are all connected with the first outfan V1 of this balance chip 202, and the colelctor electrode of this audion QC connects the second outfan V2 of this balance chip 202.
The output control terminal C2 of processing module 52 connects the first outfan V1 of balance chip 202.
During work, when control signal CTX_N of input becomes high level V3, control module 51 is output as low level V2, but owing to the first connector F1 disconnects, the output control terminal A4 of control module 51 and the first outfan V1 balancing chip 202 is without being connected.When control signal CTX_N of input is high level, controlling metal-oxide-semiconductor M3 conducting, the second connector F2 disconnection makes the grid end of metal-oxide-semiconductor M4 be mirrored constant-current source M5 and is pulled to high level POWER voltage, and metal-oxide-semiconductor M4 turns on.Then balance chip 202 first outfan V1 control audion QC base stage with launch interpolar electric current Ibe by balance the first outfan V1 of chip 202, the output control terminal C2 of processing module 52, metal-oxide-semiconductor M3, M4 after through processing module 52 earth terminal GND flow into ground.Meanwhile, audion QC turns on, and external balance loop is opened.
In sum, above-mentioned bascule 200, when its switch element includes audion QC, the electric current Ibe flowing into balance chip 202 through the first outfan V1 of balance chip 202 can be held by the output control terminal C2 and earth terminal GND of processing module 52 with flowing to, this makes bascule in the case of can be used in time sharing sampling, also can be suitably used for real-time sampling, thus improve battery equilibrium efficiency, it is ensured that balancing speed.
Please join Fig. 5, in one embodiment, bascule 300 also includes output module 53, the output control terminal A4 of this control module 51 connects the first input end G1 of this output module 53, the output control terminal C2 of this processing module 52 connects the second input G2 of this output module 53, and the output control terminal G3 of this output module 53 connects the output control terminal BALX of this balance chip.Output module 53 is Differential Output module, may be coupled directly to control module 51 and is exported by control module 51, it is possible to is connected to processing module 52 and is exported by processing module 52.At the same time it can also be connected to the output of multiple phase inverter.
Please join Fig. 6, the battery protection system 400 of better embodiment of the present invention includes multiple bascule 402 and multiple battery 404.The plurality of battery 404 is connected in series.In present embodiment, what each bascule 402 was selected is the bascule driving triode-type, and the switch element of the most each bascule 402 includes audion Q1, Q2, Q3 or Q4.
In bascule 402, first outfan of balance chip 406 and the second outfan are for connecting two poles of a battery 304 respectively, such as, the first outfan of balance chip 406 connects the positive pole of battery 404, and the second outfan of balance chip 306 connects the negative pole of battery 404.Being appreciated that in other embodiments, the first outfan of balance chip also can connect the positive pole of a set of cells, and the second outfan of balance chip also can connect the negative pole of this set of cells, and this set of cells includes 2 or the series connection formation of above battery.
Specifically, in present embodiment, the quantity of bascule 402 is 4 with the quantity of battery 404.The control signal of input is respectively CT1_N, CT2_N, CT3_N and CT4_N.The input of balance chip 406 controls end and is respectively BAL1, BAL2, BAL3 and BAL4.Be appreciated that in other embodiments, but the quantity of bascule 402 and battery 404 be other quantity, as 2 or more than.
Above-mentioned battery protection system 400; when switch element includes audion; the electric current flowing into balance chip through balancing the output control terminal of chip can be held by the output control terminal of processing module and earth terminal with flowing to; this makes battery protection system in the case of can be used in time sharing sampling; also can be suitably used for real-time sampling; thus improve battery equilibrium efficiency, it is ensured that balancing speed.Further, above-mentioned battery protection system is applicable to drive metal-oxide-semiconductor type and drive the balance mode of triode-type, and range of application is wider.
In the description of this specification, the description of reference term " embodiment ", " some embodiments ", " exemplary embodiment ", " example ", " concrete example " or " some examples " etc. means that the specific features, structure, material or the feature that combine described embodiment or example description are contained at least one embodiment or the example of the present invention.In this manual, the schematic representation to above-mentioned term is not necessarily referring to identical embodiment or example.And, the specific features of description, structure, material or feature can combine in any one or more embodiments or example in an appropriate manner.
While embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that: these embodiments can carry out in the case of without departing from the principle of the present invention and objective multiple change, revise, replace and modification, the scope of the present invention is limited by claim and equivalent thereof.
Claims (10)
1. the bascule for battery protection system, it is characterised in that including balancing chip and switch element, this balance chip includes control module and processing module, and this switch element includes audion or metal-oxide-semiconductor, and this processing module includes earth terminal；
The input of this control module controls the control end that inputs of end and this processing module and is all connected with the input control end of this balance chip; first outfan of this control module connects the first outfan of this balance chip; second outfan of this control module connects the second outfan of this balance chip, and the first outfan of this balance chip and the second outfan are for connecting two poles of protected battery respectively；
The output control terminal of this balance chip connects the control end of this switch element, and the first end of this switch element connects the first outfan of this balance chip, and the second end of this switch element connects the second outfan of this balance chip；
When this switch element includes this audion, the output control terminal of this control module disconnects with the output control terminal of this balance chip, the output control terminal of this processing module connects the output control terminal of this balance chip, this processing module controls conducting and the shutoff of this audion according to the control signal of input by the end that controls of this switch element, and this earth terminal connects the output control terminal of this processing module；
When this switch element includes this metal-oxide-semiconductor, the output control terminal of this control module connects the output control terminal of this balance chip, and this control module controls conducting and the shutoff of this metal-oxide-semiconductor according to the control signal of this input by the end that controls of this switch element.
2. bascule as claimed in claim 1, it is characterised in that this balance chip includes the first connector and the second connector；
This first connector is between the output control terminal and the output control terminal of this balance chip of this control module, and this second connector is between the selection end and this earth terminal of this processing module；
When this switch element includes this audion, this first connector disconnects the connection of the output control terminal of this control module and the output control terminal of this balance chip, and this second connector disconnects the connection of this selection end and this earth terminal；
When this switch element includes this metal-oxide-semiconductor, this first connector connects the output control terminal of this control module and the output control terminal of this balance chip, and this second connector connects this selection end and this earth terminal.
3. bascule as claimed in claim 1, it is characterized in that, this control module includes metal-oxide-semiconductor M1 and metal-oxide-semiconductor M2, the grid end of metal-oxide-semiconductor M1 and the grid end of metal-oxide-semiconductor M2 are all connected with the input of this control module and control end, the drain terminal of the drain terminal of metal-oxide-semiconductor M1 and metal-oxide-semiconductor M2 is all connected with the output control terminal of this control module, the source of metal-oxide-semiconductor M1 connects the first outfan of this control module, and the source of metal-oxide-semiconductor M2 connects the second outfan of this control module.
4. bascule as claimed in claim 2, it is characterised in that this processing module includes metal-oxide-semiconductor M3, M4, M5, M6 and constant-current source Idd；
The grid end of metal-oxide-semiconductor M3 connects the input of this processing module and controls end, and the drain terminal of metal-oxide-semiconductor M3 connects the output control terminal of this processing module, and the source of metal-oxide-semiconductor M3 connects the drain terminal of metal-oxide-semiconductor M4；
The grid end of metal-oxide-semiconductor M4 connects this selection end, and the source of metal-oxide-semiconductor M4 connects this earth terminal；
The drain terminal of metal-oxide-semiconductor M5 connects this selection end, the source of the source of metal-oxide-semiconductor M5 and metal-oxide-semiconductor M6 is all connected with the power end of this processing module, the grid end of metal-oxide-semiconductor M5 and the grid end of metal-oxide-semiconductor M6 are all connected with one end of constant-current source Idd, and the drain terminal of metal-oxide-semiconductor M6 connects one end of constant-current source Idd；
The other end of constant-current source Idd connects this earth terminal.
5. bascule as claimed in claim 3, it is characterized in that, this bascule also includes resistance Ra, R2 and R3, and this switch element includes metal-oxide-semiconductor MB, first outfan of this balance chip connects one end of resistance R3, and the other end of resistance R3 connects the drain terminal of metal-oxide-semiconductor MB；
The output control terminal of this balance chip connects the grid end of metal-oxide-semiconductor MB, and the source of metal-oxide-semiconductor MB connects one end of resistance Ra, and the other end of resistance Ra connects one end of resistance R2, and the other end of resistance R2 connects the second outfan of this balance chip.
6. bascule as claimed in claim 3, it is characterized in that, this bascule also includes resistance Ra, R2, R3 and Rb, and this switch element includes audion QB, first outfan of this balance chip connects one end of resistance R3, the emitter stage of the other end connecting triode QB of resistance R3；
The output control terminal of this balance chip connects one end of resistance Ra through the base stage of resistance Rb connecting triode QB, the colelctor electrode of audion QB, and the other end of resistance Ra connects one end of resistance R2, and the other end of resistance R2 connects the second outfan of this balance chip.
7. bascule as claimed in claim 1, it is characterized in that, this bascule also includes output module, the output control terminal of this control module connects the first input end of this output module, the output control terminal of this processing module connects the second input of this output module, and the output control terminal of this output module connects the output control terminal of this balance chip.
8. a battery protection system, including multiple bascules and multiple battery, it is characterised in that; each bascule includes balancing chip and switch element; this balance chip includes control module and processing module, and this switch element includes audion or metal-oxide-semiconductor, and this processing module includes earth terminal；
The input of this control module controls the control end that inputs of end and this processing module and is all connected with the input control end of this balance chip, first outfan of this control module connects the first outfan of this balance chip, second outfan of this control module connects the second outfan of this balance chip, and the first outfan of this balance chip and the second outfan are for being respectively connecting to two poles of a few battery；
The output control terminal of this balance chip connects the control end of this switch element, and the first end of this switch element connects the first outfan of this balance chip, and the second end of this switch element connects the second outfan of this balance chip；
When this switch element includes this audion, the output control terminal of this control module disconnects with the output control terminal of this balance chip, the output control terminal of this processing module connects the output control terminal of this balance chip, this processing module controls conducting and the shutoff of this audion according to the control signal of input by the end that controls of this switch element, and this earth terminal connects the output control terminal of this processing module；
When this switch element includes this metal-oxide-semiconductor, the output control terminal of this control module connects the output control terminal of this balance chip, and this control module controls conducting and the shutoff of this metal-oxide-semiconductor according to the control signal of this input by the end that controls of this switch element.
9. battery protection system as claimed in claim 8, it is characterised in that this balance chip includes the first connector and the second connector；
This first connector is between the output control terminal and the output control terminal of this balance chip of this control module, and this second connector is between the selection end and this earth terminal of this processing module；
When this switch element includes this audion, this first connector disconnects the connection of the output control terminal of this control module and the output control terminal of this balance chip, and this second connector disconnects the connection of this selection end and this earth terminal；
When this switch element includes this metal-oxide-semiconductor, this first connector connects the output control terminal of this control module and the output control terminal of this balance chip, and this second connector connects this selection end and this earth terminal.
10. the bascule for battery protection system, it is characterised in that including balancing chip and switch element, this balance chip includes control module and processing module, and this switch element includes audion, and this processing module includes earth terminal；
The input of this control module controls the control end that inputs of end and this processing module and is all connected with the input control end of this balance chip; first outfan of this control module connects the first outfan of this balance chip; second outfan of this control module connects the second outfan of this balance chip, and the first outfan of this balance chip and the second outfan are for connecting two poles of protected battery respectively；
The base stage of this audion and emitter stage are all connected with the first outfan of this balance chip, and the colelctor electrode of this audion connects the second outfan of this balance chip；
The output control terminal of this processing module connects the first outfan of this balance chip, and this processing module controls conducting and the shutoff of this audion according to the control signal of input, and this earth terminal connects the output control terminal of this processing module.
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| CN201510011349.XA CN105826958B (en) | 2015-01-09 | 2015-01-09 | Balancing device for battery protection system and battery protection system |
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| CN201510011349.XA CN105826958B (en) | 2015-01-09 | 2015-01-09 | Balancing device for battery protection system and battery protection system |
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