CN103390777B - Single lithium battery device with measuring circuit - Google Patents
Single lithium battery device with measuring circuit Download PDFInfo
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- CN103390777B CN103390777B CN201310325847.2A CN201310325847A CN103390777B CN 103390777 B CN103390777 B CN 103390777B CN 201310325847 A CN201310325847 A CN 201310325847A CN 103390777 B CN103390777 B CN 103390777B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention relates to a single lithium battery device with a measuring circuit, which belongs to the technical field of lithium battery measurement and aims at solving the problems that an existing lithium battery pack measuring circuit is complex in structure and low in measurement accuracy. The single lithium battery device with the measuring circuit comprises a single lithium battery to be measured, a surge suppression circuit, a balance control circuit, a singlechip, a communication circuit, a temperature sensor and a connector, wherein the surge suppression circuit, the balance control circuit, the singlechip, the communication circuit, the temperature sensor and the connector form the measuring circuit, and the measuring circuit and the single lithium battery to be measured are encapsulated together. The single lithium battery device with the measuring circuit has the advantage that the measuring circuit is added to the single lithium battery, and that the measuring circuit and the single lithium battery form a whole body. The single lithium battery device with the measuring circuit is applied to measurement on a lithium battery.
Description
Technical field
The present invention relates to single the lithium battery device with measuring circuit, belong to lithium battery field of measuring technique.
Background technology
In the measuring technique of existing lithium battery, for the lithium battery group be combined into by multiple lithium battery, need to measure the parameter of each cell, in prior art, that the parameter of the corresponding circuit of design to each cell in lithium battery group is measured, realize the complex structure of the measuring circuit of this metering system, and low to the measurement accuracy of cell, use inconvenience.
Summary of the invention
The present invention seeks to, in order to solve the existing measuring circuit complex structure for lithium battery group, the problem that measurement accuracy is low, to provide a kind of single lithium battery device with measuring circuit.
Single the lithium battery device with measuring circuit of the present invention, it comprises tested monocell, it also comprises surge restraint circuit, balancing control circuit, single-chip microcomputer, telecommunication circuit, temperature sensor and connector, surge restraint circuit, balancing control circuit, single-chip microcomputer, telecommunication circuit, temperature sensor and connector form measuring circuit, and described measuring circuit and tested monocell are packaged together;
The positive pole of surge restraint circuit connects the positive electrode Bat+ of tested monocell, the negative pole of surge restraint circuit connects the negative electrode Bat-of tested monocell, balancing control circuit is in parallel with surge restraint circuit, the control signal input of balancing control circuit connects the control signal output of single-chip microcomputer, the positive pole feeder ear of single-chip microcomputer connects the VCC end of power supply, the negative pole feeder ear of single-chip microcomputer connects the GND end of power supply, the positive pole feeder ear of balancing control circuit connects the VCC end of power supply, the negative pole feeder ear of balancing control circuit connects the GND end of power supply, the VCC end of power supply connects the positive pole feeder ear of telecommunication circuit,
Temperature sensor is for gathering the temperature signal of tested monocell, the temperature signal output of temperature sensor connects the temperature signal input of single-chip microcomputer, single-chip microcomputer signal transmission transmitting terminal connects the signal transmission receiving terminal of telecommunication circuit, single-chip microcomputer signal transmission receiving terminal connects the signal transmission transmitting terminal of telecommunication circuit, first output of telecommunication circuit and the first input end sub-connection of connector, second output of telecommunication circuit is connected with the second input terminal of connector, 3rd output of telecommunication circuit is connected with the 3rd input terminal of connector, 4th output of telecommunication circuit and the four-input terminal sub-connection of connector.
Described telecommunication circuit is made up of the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the first photoelectrical coupler and the second photoelectrical coupler,
First photoelectrical coupler is made up of the first light-emitting diode and the first triode, and the second photoelectrical coupler is made up of the second light-emitting diode and the second triode,
The positive pole feeder ear of telecommunication circuit is one end of the first resistance, the other end of the first resistance connects the anode of the first light-emitting diode, the negative electrode of the first light-emitting diode is the signal transmission receiving terminal of telecommunication circuit, the collector electrode of the first triode connects one end of the second resistance, the other end of the second resistance is the first output of telecommunication circuit, the second output of the transmitting of the first triode very telecommunication circuit;
One end of described first resistance connects one end of the 3rd resistance, the other end of the 3rd resistance is the signal transmission transmitting terminal of telecommunication circuit, the other end of the 3rd resistance connects the collector electrode of the second triode, the emitter of the second triode connects the GND end of power supply, the anode of the second light-emitting diode connects one end of the 4th resistance, the other end of the 4th resistance is the 3rd output of telecommunication circuit, and the negative electrode of the second light-emitting diode is the 4th output of telecommunication circuit.
Described surge restraint circuit is insured by the first self-recoverage, the second self-recoverage insures and transient voltage suppressor diode forms,
One end of first self-recoverage insurance is the positive pole of surge restraint circuit, the other end of the first self-recoverage insurance connects the negative electrode of transient voltage suppressor diode, the anode of transient voltage suppressor diode connects one end of the second self-recoverage insurance, the other end of the second self-recoverage insurance is the negative pole of surge restraint circuit, the negative electrode of transient voltage suppressor diode is the cathode output end of surge restraint circuit, the anode of transient voltage suppressor diode is the cathode output end of surge restraint circuit, balancing control circuit is connected between the cathode output end of surge restraint circuit and cathode output end.
The reverse breakdown voltage of transient voltage suppressor diode is 5V.
Advantage of the present invention: instant invention overcomes the existing conventional design thinking for battery pack measuring system, it is not be optimized to the structure of measuring circuit the problem solving measurement accuracy, but from whole battery measurement technology, change the structure of the cell of composition battery pack, that is: measuring circuit is increased for cell, measuring circuit is made to become to be integrated with cell, therefore, in the measuring system of the battery pack be assembled into by cell device of the present invention, do not need to consider the measuring technique to cell, and only need the circuit considering data acquisition and processing (DAP) part.In addition, together with the measuring circuit of cell is designed with cell, decrease the distance of Signal transmissions, avoid the interference that holding wire brings, and then improve measurement accuracy.
Cell apparatus inside of the present invention includes the measuring circuit of electric parameter, can measure voltage and the temperature of single lithium battery, and the holding wire transmission range measuring parameter is short, decreases interference and then improves certainty of measurement; Simultaneously in device of the present invention also with communication function circuit, it achieve measurement data and outside real-time, interactive.Adopt the battery pack that device of the present invention forms, because the parameter measurement circuit of each cell is all packaged together with cell, therefore the measuring system of this battery pack only needs to be connected with battery pack by telecommunication circuit, the parameter of all cells can be obtained, the circuit structure of measuring system is simple, and highly versatile.Adopt the battery pack of single lithium battery composition of the present invention, the measuring circuit for cell is no longer needed in its measuring system, because this simplify the circuit structure of the measuring system for lithium battery group, and measurement of the present invention and control circuit are for cell and be packaged together with cell, measuring circuit, not by ectocine, is measured accurate, timely.
The voltage of described measuring circuit is up to the terminal voltage of single battery, system safety, reliable operation; It does not have the switching mechanism of cell voltage, and acquisition system can adopt the low pass filter of long-time constant, improves the accuracy of battery voltage acquisition, and circuit structure is simple, lower power consumption, and battery pack staticly can be deposited and reach more than 6 months; System cost reduces.
The output port of connector COMM is arranged to the form of lead-out terminal by the present invention, measures order of accuarcy high, uses convenient.The present invention is applicable to the design field of the cell of the battery pack of assembling electric automobile.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of measuring circuit of the present invention;
Fig. 2 be measuring circuit of the present invention and cell are packaged together after a kind of structural representation;
Fig. 3 is the circuit theory diagrams of surge restraint circuit of the present invention;
Fig. 4 is the circuit theory diagrams of balancing control circuit.
Embodiment
Embodiment one: present embodiment is described below in conjunction with Fig. 1, Fig. 2 and Fig. 4, with single lithium battery device of measuring circuit described in present embodiment, it comprises tested monocell, it also comprises surge restraint circuit 1, balancing control circuit 2, single-chip microcomputer 3, telecommunication circuit 4, temperature sensor 5 and connector 6, surge restraint circuit 1, balancing control circuit 2, single-chip microcomputer 3, telecommunication circuit 4, temperature sensor 5 and connector 6 form measuring circuit, and described measuring circuit and tested monocell are packaged together;
The positive pole of surge restraint circuit 1 connects the positive electrode Bat+ of tested monocell, the negative pole of surge restraint circuit 1 connects the negative electrode Bat-of tested monocell, balancing control circuit 2 is in parallel with surge restraint circuit 1, the control signal input of balancing control circuit 2 connects the control signal output of single-chip microcomputer 3, the positive pole feeder ear of single-chip microcomputer 3 connects the VCC end of power supply, the negative pole feeder ear of single-chip microcomputer 3 connects the GND end of power supply, the positive pole feeder ear of balancing control circuit 2 connects the VCC end of power supply, the negative pole feeder ear of balancing control circuit 2 connects the GND end of power supply, the VCC end of power supply connects the positive pole feeder ear of telecommunication circuit 4,
Temperature sensor 5 is for gathering the temperature signal of tested monocell, the temperature signal output of temperature sensor 5 connects the temperature signal input of single-chip microcomputer 3, single-chip microcomputer 3 signal transmission transmitting terminal connects the signal transmission receiving terminal of telecommunication circuit 4, single-chip microcomputer 3 signal transmission receiving terminal connects the signal transmission transmitting terminal of telecommunication circuit 4, first output of telecommunication circuit 4 and the first input end sub-connection of connector 6, second output of telecommunication circuit 4 is connected with the second input terminal of connector 6, 3rd output of telecommunication circuit 4 is connected with the 3rd input terminal of connector 6, 4th output of telecommunication circuit 4 and the four-input terminal sub-connection of connector 6.
In present embodiment, surge restraint circuit 1 is for suppressing the surge voltage of the voltage detecting line from tested monocell.In the course of work of serial power lithium battery group, due to loose contact and inside battery structure, the surge voltage of meeting number hectovolt on voltage detecting line, if unconstrained to this surge voltage, then can cause the damage of voltage acquisition module.
Single-chip microcomputer 3 is as the core of circuit of the present invention, for gathering voltage and the temperature of tested monocell, and data passed to telecommunication circuit 4 and send control signal to balancing control circuit 2, make the Balance route that balancing control circuit 2 realizes tested monocell output voltage.
Balancing control circuit 2 is controlled according to the voltage signal gathered by single-chip microcomputer 3, performs the Balance route to cell voltage.Balancing control circuit 2 adopts the mode of discharge type equilibrium, namely by discharge resistance to battery discharge, make electric quantity consumption unnecessary in battery on discharge resistance, reach battery balanced object.
Measuring circuit of the present invention, for gathering the temperature of tested monocell, in actual applications, is integrated in the back side of tested monocell by temperature sensor 5, and as shown in Figure 2, its mark A represents described measuring circuit.
Telecommunication circuit 4 and single-chip microcomputer 3 carry out isolated communication, and it can receive the control command to single-chip microcomputer 3, and can upload image data.
Embodiment two: present embodiment is described below in conjunction with Fig. 1, present embodiment is described further execution mode one, telecommunication circuit 4 described in present embodiment is made up of the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the first photoelectrical coupler and the second photoelectrical coupler
First photoelectrical coupler is made up of the first light-emitting diode D1 and the first triode T1, and the second photoelectrical coupler is made up of the second light-emitting diode D2 and the second triode T2,
The positive pole feeder ear of telecommunication circuit 4 is one end of the first resistance R1, the other end of the first resistance R1 connects the anode of the first light-emitting diode D1, the negative electrode of the first light-emitting diode D1 is the signal transmission receiving terminal of telecommunication circuit 4, the collector electrode of the first triode T1 connects one end of the second resistance R2, the other end of the second resistance R2 is the first output of telecommunication circuit 4, the second output of the transmitting of the first triode T1 very telecommunication circuit 4;
One end of described first resistance R1 connects one end of the 3rd resistance R3, the other end of the 3rd resistance R3 is the signal transmission transmitting terminal of telecommunication circuit 4, the other end of the 3rd resistance R3 connects the collector electrode of the second triode T2, the emitter of the second triode T2 connects the GND end of power supply, the anode of the second light-emitting diode D2 connects one end of the 4th resistance R4, the other end of the 4th resistance R4 is the 3rd output of telecommunication circuit 4, and the negative electrode of the second light-emitting diode D2 is the 4th output of telecommunication circuit 4.
In present embodiment, when single-chip microcomputer 3 enters holding state in data acquisition with the gap communicated, the first photoelectrical coupler TX and the second photoelectrical coupler RX enters cut-off state, and the electric current of whole measuring circuit can reach microampere order.The single-chip microcomputer 3 of holding state has communication disruption to wake up, enters normal mode of operation.
The present invention can be applicable in the lithium battery management system of electric automobile, battery-operated motor cycle and PACK.
Embodiment three: present embodiment is described below in conjunction with Fig. 3, present embodiment is described further execution mode one or two, and surge restraint circuit 1 described in present embodiment insures R by the first self-recoverage
p1, second self-recoverage insurance R
p2with transient voltage suppressor diode Z
tcomposition,
First self-recoverage insurance R
p1one end be the positive pole of surge restraint circuit 1, the first self-recoverage insurance R
p1the other end connect transient voltage suppressor diode Z
tnegative electrode, transient voltage suppressor diode Z
tanode connect second self-recoverage insurance R
p2one end, second self-recoverage insurance R
p2the other end be the negative pole of surge restraint circuit 1, transient voltage suppressor diode Z
tnegative electrode be the cathode output end of surge restraint circuit 1, transient voltage suppressor diode Z
tanode be the cathode output end of surge restraint circuit 1, between the cathode output end that balancing control circuit 2 is connected to surge restraint circuit 1 and cathode output end.
Embodiment four: present embodiment is described below in conjunction with Fig. 3, present embodiment is described further execution mode three, in present embodiment, transient voltage suppressor diode Z
treverse breakdown voltage be 5V.
Operation principle: shown in Fig. 3, V
i+and V
i-for the voltage input end of surge restraint circuit 1, it is connected with the positive and negative electrode of tested monocell respectively.Under normal circumstances, V
i+and V
i-pressure reduction be 2.8V ~ 4.5V.First self-recoverage insurance R
p1with the second self-recoverage insurance R
p2operating voltage be greater than 400V.V
o+and V
o-be respectively cathode output end and the cathode output end of surge restraint circuit 1, its output voltage signal is connected to the voltage detecting input of balancing control circuit 2.
Work as V
i+-V
i-during≤5V, Z
tbe in reverse blocking state, R
p1and R
p2for conducting state.V
o+=V
i+，V
o-=V
i-。
Work as V
i+-V
i-during >5V, Z
treverse breakdown, the voltage clamping at its two ends is at about 5V, and reverse current moment can reach tens amperes.R
p1 and R
p2 change blocking state into rapidly by conducting state.V
o+-V
o-maintain Z
tclamp voltage on.Work as V
i+-V
i-when returning to below 5V, Z
tbe transformed into reverse blocking state, R
p1and R
p2revert to conducting state, V
o+=V
i+, V
o-=V
i-.Circuit reverts to normal operating conditions.
Described surge restraint circuit 1 has following advantage relative to other surge protection method:
(1) reaction speed is fast, current capacity is large:
Owing to adopting transient voltage suppressor diode as the detecting element of surge voltage, protection speed quickly, can reach nanosecond.The immediate current of transient voltage suppressor diode can reach tens amperes, the absorbability of surge voltage is far longer than to several milliamperes of the traditional circuit adopting common voltage stabilizing didoe.Therefore the moment arrived at surge has good voltage inhibitory action.
(2) impedance is little, blocking-up electric current is little:
The blocking element used in surge restraint circuit insures for self-recoverage, and the resistance of its non-blacked state only has tens ohm, and the pressure drop of generation is very little, very little on the impact of follow-up System of voltage acquisition.When self-recoverage insurance blocks, block maintenance electric current and only have several milliampere, heat up not obvious.Surge restraint circuit adopts the guard method in the whole loop of blocking-up and only uses the method for piezo-resistance to compare, and guard period does not have big current, and stability and the reliability of system significantly improve.
(3) little, the unlimited action of volume:
Although there is Surge Protector can play good protective effect, complex structure in the market, volume is large, can not directly be put in circuit.And the circuit element of surge restraint circuit of the present invention is few, can directly be installed on printed circuit board (PCB).The blocking element adopted in circuit is self-recoverage insurance, compared with traditional disposable fuse, after it enters blocking state, do not need manual intervention, can conducting state be automatically restored to after surge voltage disappears, and can perseveration, there is no the restriction of number of times.
The main application fields of described surge restraint circuit is battery management system and the battery protecting plate of series battery, is particularly useful in the battery management system used electric automobile.
Claims (4)
1. a single lithium battery device with measuring circuit, it comprises tested monocell, it is characterized in that, it also comprises surge restraint circuit (1), balancing control circuit (2), single-chip microcomputer (3), telecommunication circuit (4), temperature sensor (5) and connector (6), surge restraint circuit (1), balancing control circuit (2), single-chip microcomputer (3), telecommunication circuit (4), temperature sensor (5) and connector (6) form measuring circuit, and described measuring circuit and tested monocell are packaged together;
The positive pole of surge restraint circuit (1) connects the positive electrode Bat+ of tested monocell, the negative pole of surge restraint circuit (1) connects the negative electrode Bat-of tested monocell, balancing control circuit (2) is in parallel with surge restraint circuit (1), the control signal input of balancing control circuit (2) connects the control signal output of single-chip microcomputer (3), the positive pole feeder ear of single-chip microcomputer (3) connects the VCC end of power supply, the negative pole feeder ear of single-chip microcomputer (3) connects the GND end of power supply, the positive pole feeder ear of balancing control circuit (2) connects the VCC end of power supply, the negative pole feeder ear of balancing control circuit (2) connects the GND end of power supply, the VCC end of power supply connects the positive pole feeder ear of telecommunication circuit (4),
Temperature sensor (5) is for gathering the temperature signal of tested monocell, the temperature signal output of temperature sensor (5) connects the temperature signal input of single-chip microcomputer (3), single-chip microcomputer (3) signal transmission transmitting terminal connects the signal transmission receiving terminal of telecommunication circuit (4), single-chip microcomputer (3) signal transmission receiving terminal connects the signal transmission transmitting terminal of telecommunication circuit (4), first output of telecommunication circuit (4) and the first input end sub-connection of connector (6), second output of telecommunication circuit (4) is connected with the second input terminal of connector (6), 3rd output of telecommunication circuit (4) is connected with the 3rd input terminal of connector (6), 4th output of telecommunication circuit (4) and the four-input terminal sub-connection of connector (6).
2. single the lithium battery device with measuring circuit according to claim 1, it is characterized in that, described telecommunication circuit (4) is made up of the first resistance (R1), the second resistance (R2), the 3rd resistance (R3), the 4th resistance (R4), the first photoelectrical coupler and the second photoelectrical coupler
First photoelectrical coupler is made up of the first light-emitting diode (D1) and the first triode (T1), and the second photoelectrical coupler is made up of the second light-emitting diode (D2) and the second triode (T2),
The positive pole feeder ear of telecommunication circuit (4) is one end of the first resistance (R1), the other end of the first resistance (R1) connects the anode of the first light-emitting diode (D1), the negative electrode of the first light-emitting diode (D1) is the signal transmission receiving terminal of telecommunication circuit (4), the collector electrode of the first triode (T1) connects one end of the second resistance (R2), the other end of the second resistance (R2) is the first output of telecommunication circuit (4), the second output of the transmitting of the first triode (T1) very telecommunication circuit (4);
One end of described first resistance (R1) connects one end of the 3rd resistance (R3), the other end of the 3rd resistance (R3) is the signal transmission transmitting terminal of telecommunication circuit (4), the other end of the 3rd resistance (R3) connects the collector electrode of the second triode (T2), the emitter of the second triode (T2) connects the GND end of power supply, the anode of the second light-emitting diode (D2) connects one end of the 4th resistance (R4), the other end of the 4th resistance (R4) is the 3rd output of telecommunication circuit (4), the negative electrode of the second light-emitting diode (D2) is the 4th output of telecommunication circuit (4).
3. single the lithium battery device with measuring circuit according to claim 1 and 2, is characterized in that, described surge restraint circuit (1) insures (R by the first self-recoverage
p1), second self-recoverage insurance (R
p2) and transient voltage suppressor diode (Z
t) composition,
First self-recoverage insurance (R
p1) one end be the positive pole of surge restraint circuit (1), the first self-recoverage insurance (R
p1) the other end connect transient voltage suppressor diode (Z
t) negative electrode, transient voltage suppressor diode (Z
t) anode connect second self-recoverage insurance (R
p2) one end, second self-recoverage insurance (R
p2) the other end be the negative pole of surge restraint circuit (1), transient voltage suppressor diode (Z
t) negative electrode be the cathode output end of surge restraint circuit (1), transient voltage suppressor diode (Z
t) anode be the cathode output end of surge restraint circuit (1), between the cathode output end that balancing control circuit (2) is connected to surge restraint circuit (1) and cathode output end.
4. single the lithium battery device with measuring circuit according to claim 3, is characterized in that, transient voltage suppressor diode (Z
t) reverse breakdown voltage be 5V.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310325847.2A CN103390777B (en) | 2013-07-31 | 2013-07-31 | Single lithium battery device with measuring circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310325847.2A CN103390777B (en) | 2013-07-31 | 2013-07-31 | Single lithium battery device with measuring circuit |
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| Publication Number | Publication Date |
|---|---|
| CN103390777A CN103390777A (en) | 2013-11-13 |
| CN103390777B true CN103390777B (en) | 2015-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014202617A1 (en) * | 2014-02-13 | 2015-08-13 | Robert Bosch Gmbh | Method and device for measuring a battery cell current |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101291004A (en) * | 2008-06-11 | 2008-10-22 | 陈守平 | Management device of battery pack |
| CN201656508U (en) * | 2010-01-18 | 2010-11-24 | 深圳市攀极科技有限公司 | Charging equipment of electric automobile |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004239748A (en) * | 2003-02-06 | 2004-08-26 | Sony Ericsson Mobilecommunications Japan Inc | Residual battery capacity detection method and portable terminal device |
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2013
- 2013-07-31 CN CN201310325847.2A patent/CN103390777B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101291004A (en) * | 2008-06-11 | 2008-10-22 | 陈守平 | Management device of battery pack |
| CN201656508U (en) * | 2010-01-18 | 2010-11-24 | 深圳市攀极科技有限公司 | Charging equipment of electric automobile |
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