CN205404759U - Communication circuit between group battery based on series battery - Google Patents
Communication circuit between group battery based on series battery Download PDFInfo
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- CN205404759U CN205404759U CN201521009701.8U CN201521009701U CN205404759U CN 205404759 U CN205404759 U CN 205404759U CN 201521009701 U CN201521009701 U CN 201521009701U CN 205404759 U CN205404759 U CN 205404759U
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Abstract
The utility model provides a communication circuit between group battery based on series battery, this circuit includes first subelement and second subelement, and first switching element, the second switch device, first stabilivolt, the second stabilivolt, a regulating electrical resistance and the 2nd regulating electrical resistance, its switch is controlled through the signal that the series battery to in the first subelement measured back output to first switching element, its switch is controlled through the signal that the series battery to in the second subelement measured back output to the second switch device, first stabilivolt, a regulating electrical resistance and second switch device in proper order the series connection between high level and low level, the second switch device, the 2nd regulating electrical resistance and second stabilivolt in proper order the series connection between high level and low level, the output signal of first switching element is in the 2nd regulating electrical resistance imports the second subelement, and the output signal of second switch device is in a regulating electrical resistance imports first subelement.
Description
Technical field
This utility model relates to the communicating circuit of the series battery of high-tension battery group, particularly to a kind of based on communicating circuit between the set of cells of series battery and the means of communication.
Background technology
In the actuation techniques field of hybrid electric vehicle, fuel-cell vehicle and electric automobile, what generally adopt is that motor is driven, and provides electrical energy drive electric machine rotation to drive vehicle by high-tension battery group.
High-tension battery group is generally made up of multiple cell unit, and the monomer voltage in high-tension battery group is measured in application process, can run into battery cell voltage measurement problem under high common-mode voltage.Current common practice is that high-tension battery group is divided into several or tens little subelements, and each subelement uses reserve battery monomer voltage to measure chip and measures (such as LTC6803).Each subelement is required for other subelement and battery set management master controller communication with exchange information.Owing to there being potential difference between subelement and subelement, so needing during communication to adopt isolation communication modes, such as common at present isolation Can communication, isolate SPI communication, isolation RS232 communication etc..These communication modes are required for isolation components and parts, such as optocoupler, magnetic coupling, isolating transformer etc..Owing to these isolation components and parts prices are all more expensive, cause monomer voltage Mersure Controler relatively costly.
Fig. 1 illustrates in the batteries monomer voltage measurement of prior art is applied, common isolated can communication modes structure.As it is shown in figure 1, in this scheme, each subelement includes the battery of multiple series connection.Each subelement includes the special monomer voltage measurement chip of independent battery and carries out the measurement of cell voltage for being connected to series battery.After the special monomer voltage measurement chip of each battery has measured monomer voltage, voltage data is sent to respective MCU, MCU sends data to CAN transceiver by respective isolating device, then sends input to CAN, completes the information between subelement and subelement mutual.In this structure, each subelement all exports a road isolated can, then passes through the mutual interactive information of CAN.But, in above-mentioned this scheme, each cell group is required for isolation components and parts, owing to these isolation components and parts prices are all more expensive, causes monomer voltage Mersure Controler relatively costly.And, isolated can communication modes necessarily just can meet requirement by isolating device, otherwise because of the electric potential difference between subelement, CAN transceiver damage will even be damaged whole system.Owing to isolating device price is expensive, this is too high to have resulted in system synthesis, is unfavorable for that high-volume uses.
Therefore, it is necessary to provide a kind of more cost effect and be provided that the circuit and method that the monomer voltage of high-tension battery group more preferably measures.
Utility model content
nullThis utility model is for problem mentioned above，Provide a kind of based on communicating circuit between the set of cells of series battery，Described circuit includes the first subelement and the second subelement，And first switching device、Second switch device、First stabilivolt、Second stabilivolt、First regulates resistance and second regulates resistance，Wherein: described first switching device controls its switch by the signal of output after the series battery in described first subelement is measured，Described second switch device controls its switch by the signal of output after the series battery in described second subelement is measured，Described first stabilivolt、First adjustment resistance and described second switch device are sequentially connected in series between high level and low level，Described second switch device、Second adjustment resistance and described second stabilivolt are sequentially connected in series between described high level and low level；The output signal of described first switching device regulates resistance through second and is input in described second subelement, and the output signal of described second switch device regulates resistance through first and is input in described first subelement.
Preferably, described first subelement also includes the first microcontroller, is controlled the switch of described first switching device by the output signal of described first microcontroller.
Preferably, described second subelement also includes the second microcontroller, is controlled the switch of described first switching device by the output signal of described second microcontroller.
Preferably, on the input I/O port of described first microcontroller, configuration is connected to the pull-up resistor being connected to high level.
Preferably, on the input I/O port of described second microcontroller, configuration is connected to and is connected to low level pull down resistor.
Preferably, described first switching device is PMOS or PNP triode, and described second switch device is NMOS or NPN audion.
Preferably, described first switching device and second switch device are constant-current sources.
Preferably, when controlling the level change of output IO of described first microcontroller, the input port level of described second microcontroller is followed the change of its level and is changed, when controlling the level change of output IO of described second microcontroller, the input port level of described first microcontroller is followed the change of its level and is changed.
Preferably, described pull-up resistor is arranged in described first microcontroller.
Preferably, described pull down resistor is arranged in described second microcontroller.
Relative to prior art, each subelement in high-tension battery group monomer voltage measurement system of the present utility model achieves the two-way daisy chain type communication between all subelements in whole system.According to communication modes of the present utility model, after all of monomer measuring unit all strings according to this communication modes.Such data just can be communicated with one another by adjacent monomer measuring unit, data Ll one-level is passed, more quick compared to prior art, lower in cost.
Should be appreciated that aforementioned description substantially is exemplary illustration and explanation with follow-up detailed description, the restriction to the claimed content of this utility model should not be used as.
Accompanying drawing explanation
With reference to the accompanying drawing enclosed, the more purpose of this utility model, function and advantage will be illustrated by the described below of this utility model embodiment, wherein:
Fig. 1 illustrates the isolated can communication modes structure in the batteries monomer voltage measurement of prior art is applied.
Fig. 2 schematically shows the electrical block diagram according to daisy chain type high-tension battery group monomer battery voltage measurement circuit of the present utility model.
Fig. 3 schematically show the second microcontroller in the second subelement input I/O port level follow the first subelement the first microcontroller output I/O port change voltage sequential chart.
Detailed description of the invention
To be illustrated by reference one exemplary embodiment, the purpose of this utility model and function and the method for realizing these purposes and function.But, this utility model is not limited to one exemplary embodiment disclosed below；By multi-form, it can be realized.The essence of description is only help various equivalent modifications Integrated Understanding detail of the present utility model.
Hereinafter, embodiment of the present utility model will be described with reference to the drawings.In the accompanying drawings, identical accompanying drawing labelling represents same or similar parts or same or similar step.
Fig. 2 schematically shows the electrical block diagram according to daisy chain type high-tension battery group monomer battery voltage measurement circuit of the present utility model.As shown in Figure 2, the first subelement 110 and the second subelement 120 is being included according to daisy chain type high-tension battery group monomer battery voltage measurement circuit of the present utility model, specifically, first subelement 110 includes the first series battery 111 that the battery of multiple series connection is constituted, for measuring the first battery voltage measurement special chip 112 of the first series battery 111, the first battery voltage measurement special chip 112 is measured the data obtained and is exported the first microcontroller 113.First subelement 110 also includes the first manostat 114, for providing stable voltage to input for first battery voltage measurement special chip the 112, first microcontroller 113 and other components and parts, for instance 5V.
Similarly, second subelement 120 includes the second series battery 121 that the battery of multiple series connection is constituted, for measuring the second battery voltage measurement special chip 122 of the second series battery 121, the second battery voltage measurement special chip 122 is measured the data obtained and is exported the second microcontroller 123.Second subelement 120 also includes the second manostat 124, for providing stable voltage to input for second battery voltage measurement special chip the 122, second microcontroller 123 and other components and parts, for instance 5V.
According to an embodiment of the present utility model, in the first subelement 110 and the second subelement 120, the serial battery quantity of series battery is 12 joints.For lithium battery, the total voltage of 12 joint series-connected cells is between 18V to 60V.Namely the level of V2 point is higher than the level 18V to 60V of V3 point higher than the level of level 18V to 60V, the V4 point of V1 point.The level of V3 point is be more than or equal to the level of V2 point.In first subelement 110, ground level GND1 is higher than the ground level GND2 in the second subelement 120.
First battery voltage measurement special chip 112 and the second battery voltage measurement special chip 122 measurement signal of each output respectively can pass through bus (such as SPI, RS232, I2C etc.) and be transferred to respective microcontroller, i.e. the first microcontroller 113 and the second microcontroller 123.Such as, measuring cell voltage when voltage measurement special chip is 3000mV, and just have sent a numerical value by bus to microcontroller is the data of 3000.Microcontroller data are binary modes, i.e. 101110111000b.What this can be gone here and there in binary system by microcontroller 1 is defined as high level, and 0 is defined as low level.Then this string binary system has been converted into high level, low level, high level, high level, high level, low level, high level, high level, high level, low level, low level, low level.Microcontroller, according to Fixed Time Interval, controls its I/O port and exports this string low and high level sequence.It is achieved that the signal of measuring measuring chip output of upper level is exported by the IO of microcontroller.
First microcontroller 113 and the second microcontroller 123 can be controlled by the control program that inside writes, when program goes to corresponding code, it is possible to the IO controlling its microcontroller exports high or low level.Such as, the I/O port of microcontroller is provided with the depositor of correspondence, and by writing numeral 0 inside depositor, I/O port is with regard to output low level；Writing numeral 1, I/O port just exports high level.
As shown in Figure 1, according to an embodiment of the present utility model, on the input I/O port of the first microcontroller 113 of the first subelement 110, configuration is connected to pull-up resistor R3, for by pull-up resistor R3 by the first microcontroller 113 input I/O port input voltage clamper at high level, i.e. the output high level voltage of the first manostat 124.Owing to the input I/O port of the first microcontroller 113 determines whether signal intensity with high and low level, pull-up resistor R3 may insure that and uncertain signal passes through resistance clamper at high level, to ensure the Stability and veracity of input I/O port pin detection signal.Alternatively, if the first microcontroller 113 internal support pull-up resistance, then this resistance R4 can be saved.
In like manner, according to an embodiment of the present utility model, on the input I/O port of the second microcontroller 123 of the second subelement 120 configuration be connected to pull down resistor R4, for by pull down resistor R4 by the second microcontroller 123 input I/O port input voltage clamper in low level, i.e. GND.Owing to the input I/O port of the second microcontroller 123 determines whether signal intensity with high and low level, pull down resistor R4 may insure that and uncertain signal passes through resistance clamper in low level, to ensure the Stability and veracity of input I/O port pin detection signal.Alternatively, if the second microcontroller 114 internal support configuration pull down resistor, then this pull down resistor R4 can be saved.
First subelement 110 also includes the first switching device 116, here for PMOS switch device 116.The output I/O port of the first microcontroller 113 is connected with the grid (G) of PMOS switch device 116, then can control closedown and the conducting of PMOS switch device 116 by controlling the low and high level of the output I/O port of the first microcontroller 113.
Second subelement 120 also includes second switch device 126, here for nmos switch device 126.The output I/O port of the second microcontroller 123 is connected with the grid (G) of nmos switch device 126, then can control closedown and the conducting of nmos switch device 126 by controlling the low and high level of the output I/O port of the second microcontroller 123.
First subelement 110 also includes the first stabilivolt (Z1) 115, and the positive pole of the first stabilivolt (Z1) 115 is connected to the input I/O port of the first microcontroller 113, and negative pole is connected to the outfan of the first manostat 114.When the positive terminal level of the first stabilivolt (Z1) 115 changes, the signal of its level change can input in the first microcontroller 113 by the input I/O port of the first microcontroller 113, identifies thereby through the first microcontroller 113.
Second subelement 120 also includes the second stabilivolt (Z2) 125, and the negative pole of the second stabilivolt (Z2) 125 is connected to the input I/O port of the second microcontroller 113, and positive pole is connected to GND end.When the negative pole end level of the second stabilivolt (Z2) 125 changes, the signal of its level change can input in the second microcontroller 123 by the input I/O port of the second microcontroller 123, identifies thereby through the second microcontroller 123.
It addition, be connected to the first adjustment resistance R1 between the positive pole and nmos switch device 126 of the first stabilivolt (Z1) 115, between the negative pole and PMOS switch device 116 of the second stabilivolt (Z2) 125, it is connected to the second adjustment resistance R2.
According to another embodiment of the present utility model, PMOS switch device can use PNP triode to substitute, and control mode is constant.NMOS tube can use NPN audion to substitute, and control mode is constant.
According to another embodiment of the present utility model, PMOS can use a constant-current source to substitute, and the mode enabling or cutting off and open constant current source power supply with the output of microprocessor controls constant-current source carries out Communication Control.NMOS tube can use a constant-current source to substitute, and the mode enabling or cutting off and open constant current source power supply with the output of microprocessor controls constant-current source carries out Communication Control.
Circuit operation principle according to of the present utility model daisy chain type high-tension battery group monomer battery voltage measurement circuit is explained in detail below.
As shown in Figure 2, when nmos switch device 126 turns on, the 5V power supply source having the electric current I1 the first manostat 114 output from the first subelement 110 flows through the first stabilivolt (Z1) the 115, first adjustment resistance R1 successively, nmos switch device 126 flow to the ground level GND2 in the second subelement 120, can control the size of electric current I1 by adjusting the resistance of the first adjustment resistance R1.The purpose regulating electric current I1 size is the capacity of resisting disturbance of raising system.Electric current is more big, and capacity of resisting disturbance is more strong, but during communication, power consumption is bigger.Preferably, first regulates resistance R1 can set a fixed value resistance when system is initial, and the first resistance regulating resistance R1 is fixing in communication process.Having pressure stabilization function during due to the first stabilivolt 115 reverse breakdown, when there being I1 electric current to flow through, the first stabilivolt 115 two ends are formed for an even stable voltage, for instance 5V, and namely the level of the input I/O port of the first microcontroller 113 in the first subelement 110 is 0V.When nmos switch device 126 is closed, when not having I1 electric current to flow through, pull-up effect due to pull-up resistor R3, the voltage of the positive terminal of the first stabilivolt 115 can be pulled upward to 5V, the voltage causing the first stabilivolt 115 two ends is reduced to 0V, and namely in the first subelement 110, the input I/O port level of the first microcontroller 113 becomes 5V.
When PMOS switch device 116 turns on, have electric current I2 5V feeder ear of the first manostat 114 output from the first subelement 110 and flow through that PMOS switch device 116, second regulates resistance R2, the second stabilivolt 125 flow to the ground level GND2 in the second subelement 120 successively.The size of electric current I2 can be controlled by adjusting the resistance of resistance R2.Having pressure stabilization function during due to the second stabilivolt 125 reverse breakdown, when there being I2 electric current to flow through, the second stabilivolt 125 two ends are formed for an even stable voltage 5V, and namely in the second subelement 120, the input I/O port level of the second microcontroller 123 is 5V；When PMOS switch device 116 is closed, it does not have I2 electric current flows through, due to the drop-down effect of pull down resistor R4, the voltage at the second stabilivolt 125 two ends being reduced to 0V, namely in the second subelement 120, the input I/O port level of the second microcontroller 123 becomes 0V.
Therefore, when the first microcontroller 113 of the first subelement 110 control its output I/O port be high level time, PMOS switch device 116 is closed, electric current I2 is not had to flow through the second stabilivolt 125, now the second microcontroller 123 in the second subelement 120 inputs I/O port level is 0V, is namely pulled down resistance R4 drop-down for low level 0.When the first microcontroller 113 control output IO in the first subelement 110 is low level, PMOS switch device 116 turns on, having electric current I2 to flow through the second stabilivolt 125, now the second microcontroller 123 input port level in the second subelement 120 is that 5V is high level.Now just the company's of realization the first subelement 110 sends digital signal to second subelement 120 according to fixing baud rate.
Fig. 3 schematically show the second microcontroller 123 in the second subelement 120 input I/O port level follow the first subelement 110 the first microcontroller 113 output I/O port change voltage sequential chart.
In like manner, when the second microcontroller 123 of the second subelement 120 control its output IO be high level time, nmos switch device 126 turns on, and has electric current I1 to flow through the first stabilivolt 115, and now the first microcontroller 113 input port level in the first subelement 110 is that 0V is low level 0.When the second microcontroller 123 in the second subelement 120 control its output level be low level time, nmos switch device 126 is closed, not having electric current to flow through stabilivolt Z1, now the input I/O port level of the first microcontroller 113 in the first subelement 110 is 5V, is high level 1.Now it is achieved that the second subelement 120 sends digital signal to first subelement 110 according to fixing baud rate.
According to above-mentioned control method, the two-way output transmission in the first subelement 110 and the second subelement 120 can be realized, and be full duplex transmission.
Other subelements in high-tension battery group monomer voltage measurement system are also adopted by this kind of structure, are achieved that the two-way daisy chain type communication between all subelements in whole system.According to communication modes of the present utility model, after all of monomer measuring unit all strings according to this communication modes.Such data just can be communicated with one another by adjacent monomer measuring unit, data Ll one-level is passed.Such as, when the first subelement will with the 3rd subelement communication.Then needing the first subelement to pass data to the second subelement, then the second subelement passes data to the 3rd subelement.Such data are transmitted mutually by between subelement, it is possible to the information of one of them subelement passes to all subelements in this novel communication network.
After battery voltage measurement special chip in When subunits has measured battery cell voltage, voltage data is sent to its microcontroller and then sends battery cell voltage to other subelement with this kind of communication modes excessively.
Article two, connection can also adopt wherein one as SCK (clock signal), and baud rate can be avoided during such communication not mate the output transmission error brought.
The communication speed of this kind of mode is correlated with the microcontroller work dominant frequency selected in subelement, allows communication speed faster during dominant frequency height.
In conjunction with the explanation of the present utility model disclosed here and practice, other embodiments of the present utility model are all easy to expect and understand for those skilled in the art.Illustrating and embodiment is regarded only as and is illustrative of, true scope of the present utility model and purport are all defined in the claims.
Claims (10)
1. one kind based on communicating circuit between the set of cells of series battery, described circuit includes the first subelement and the second subelement, and first switching device, second switch device, the first stabilivolt, the second stabilivolt, first regulate resistance and second and regulate resistance, wherein:
Described first switching device controls its switch by the signal of output after the series battery in described first subelement is measured, described second switch device controls its switch by the signal of output after the series battery in described second subelement is measured
Described first stabilivolt, the first adjustment resistance and described second switch device are sequentially connected in series between high level and low level, and described second switch device, the second adjustment resistance and described second stabilivolt are sequentially connected in series between described high level and low level；
The output signal of described first switching device regulates resistance through second and is input in described second subelement, and the output signal of described second switch device regulates resistance through first and is input in described first subelement.
2. communicating circuit between set of cells as claimed in claim 1, wherein said first subelement also includes the first microcontroller, is controlled the switch of described first switching device by the output signal of described first microcontroller.
3. communicating circuit between set of cells as claimed in claim 2, wherein said second subelement also includes the second microcontroller, is controlled the switch of described first switching device by the output signal of described second microcontroller.
4. communicating circuit between set of cells as claimed in claim 2, on the input I/O port of wherein said first microcontroller, configuration is connected to the pull-up resistor being connected to high level.
5. communicating circuit between set of cells as claimed in claim 3, on the input I/O port of wherein said second microcontroller, configuration is connected to and is connected to low level pull down resistor.
6. communicating circuit between set of cells as claimed in claim 1, wherein said first switching device is PMOS or PNP triode, and described second switch device is NMOS or NPN audion.
7. communicating circuit between set of cells as claimed in claim 1, wherein said first switching device and second switch device are constant-current sources.
8. communicating circuit between set of cells as claimed in claim 3, wherein when controlling the level change of output IO of described first microcontroller, the input port level of described second microcontroller is followed the change of its level and is changed, when controlling the level change of output IO of described second microcontroller, the input port level of described first microcontroller is followed the change of its level and is changed.
9. communicating circuit between set of cells as claimed in claim 4, wherein said pull-up resistor is arranged in described first microcontroller.
10. communicating circuit between set of cells as claimed in claim 5, wherein said pull down resistor is arranged in described second microcontroller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521009701.8U CN205404759U (en) | 2015-12-08 | 2015-12-08 | Communication circuit between group battery based on series battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521009701.8U CN205404759U (en) | 2015-12-08 | 2015-12-08 | Communication circuit between group battery based on series battery |
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| CN205404759U true CN205404759U (en) | 2016-07-27 |
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| CN201521009701.8U Active CN205404759U (en) | 2015-12-08 | 2015-12-08 | Communication circuit between group battery based on series battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353320A (en) * | 2015-12-08 | 2016-02-24 | 北京科易动力科技有限公司 | Communication circuit among battery groups based on series battery groups and communication method |
| CN110138034A (en) * | 2019-05-22 | 2019-08-16 | 杭州士腾科技有限公司 | The concatenated discrete signal detection circuit of double cell packet |
-
2015
- 2015-12-08 CN CN201521009701.8U patent/CN205404759U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353320A (en) * | 2015-12-08 | 2016-02-24 | 北京科易动力科技有限公司 | Communication circuit among battery groups based on series battery groups and communication method |
| CN110138034A (en) * | 2019-05-22 | 2019-08-16 | 杭州士腾科技有限公司 | The concatenated discrete signal detection circuit of double cell packet |
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