CN101363879B - Electrical level polar conversion device, electric voltage sampling apparatus and electric voltage sampling method - Google Patents
Electrical level polar conversion device, electric voltage sampling apparatus and electric voltage sampling method Download PDFInfo
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- CN101363879B CN101363879B CN2007101432746A CN200710143274A CN101363879B CN 101363879 B CN101363879 B CN 101363879B CN 2007101432746 A CN2007101432746 A CN 2007101432746A CN 200710143274 A CN200710143274 A CN 200710143274A CN 101363879 B CN101363879 B CN 101363879B
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Abstract
The invention provides a level polarity conversion device and a voltage sampling device including the level polarity conversion device. The level polarity conversion device comprises a switch block and a controller. The two input ends of the switch block provides two level different signals for a plurality of controllable switches and outputs the two level different signals; the controller is used for detecting the level of the level signals of the first and the second input ends, and controlling the on/off status of each controllable switch based on the level of the level signals so as to ensure that the level difference of the level signals output from the switch block is always positive or negative. The invention further provides a battery pack voltage sampling method, which comprises the following steps of collecting a single battery level signal of the battery pack, and inputting a data processing device for carrying out analog-to-digital conversion. The level signal input into the high level input end of the data processing device is always higher than that of the low level input end of the data processing device. The level polarity conversion device, and the voltage sampling device and the voltage sampling method provided by the invention ensure voltage sampling precision.
Description
Technical field
The present invention relates to voltage sampling apparatus, a kind of electrical level polar conversion device, a kind of voltage sampling apparatus and a kind of voltage sampling method especially are set.
Background technology
When a plurality of cells are serially connected in electric battery as supply unit, require all cells all to be in normal and uniform duty, therefore particularly important to the detecting ﹠ monitoring of all cell operating voltage in the electric battery.For the voltage to each piece battery of this electric battery carries out sample detecting, be provided with voltage sampling apparatus.Described voltage sampling apparatus gathers the level signal of each piece cell, and the level signal that collects is input to A/D converter carries out simulating signal to the conversion of digital signal.
The input voltage of existing A/D converter usually requires as just, for the level signal of the high level end that guarantees each input a/d converter all is higher than the level signal of the low level end of input a/d converter, is provided with electrical level polar conversion device.
Existing electrical level polar conversion device adopts totalizer that a datum is provided, so that the level signal that sampling obtains adds after the datum, the level difference value between the level signal is for just, and then input a/d converter.Owing to add datum so that the level that sampling obtains all is elevated, level signal increases than original, the level signal size that therefore can not guarantee the output level polar conversion device is big or small identical with the level signal that obtains of sampling, in order to guarantee the size of level signal, can after the level that sampling is obtained is raised, increase again a ratio and dwindle circuit, can cause like this by the voltage sample precision after the A/D converter conversion and reduce half.
Summary of the invention
The objective of the invention is for the not high problem of voltage accuracy of using existing voltage sampling apparatus sampling to obtain, the electrical level polar conversion device that the voltage accuracy that provides a kind of sampling to obtain is higher, voltage sampling apparatus and voltage sampling method.
Electrical level polar conversion device provided by the invention comprises switches set, described switches set comprises first input end, the second input end, the first output terminal, the second output terminal, with a plurality of gate-controlled switches, described first input end is used for providing two signals that level is different to a plurality of gate-controlled switches with the second input end, the first output terminal is used for these two signals that level is different of output with the second output terminal, this electrical level polar conversion device also comprises controller, described controller respectively with first input end, the second input end is connected with gate-controlled switch, level height for detection of the different signal of two level of first input end and the second input end, according to the switching of switch in the height gauge tap group of described level signal, to guarantee being always plus or minus from the level difference value between the level signal of the first output terminal of switches set and the output of the second output terminal.
Voltage sampling apparatus provided by the invention comprises electrical level polar conversion device, and described electrical level polar conversion device is electrical level polar conversion device provided by the invention.
Voltage sampling method provided by the invention comprises that each the piece cell to being connected in series in the electric battery carries out voltage sample, the level signal that collects is inputted data processing equipment so that analog level signal is converted to digital signal level, this data processing equipment has high level input end and low level input end, the level signal of its input high level input end always is higher than the level signal of input low level input end, and the level signal of input high level input end always to be higher than the level signal of input low level input end identical with the level signal size that collects.
The controller of electrical level polar conversion device provided by the invention by the different signal of two level that detect the input switch group the level height and guarantee that the level difference value of output switch group just is being always or for negative according to the switching of switch in the level height gauge tap group of described level signal, just can select closure with the input end of A/D converter according to the plus or minus of output level difference, thereby the level signal input a/d converter is carried out the A/D conversion, do not need to add that any datum causes the change of level signal size.The above-mentioned electrical level polar conversion device that voltage sampling apparatus provided by the invention comprises the big or small constant of the level signal that obtains that can guarantee to sample, thus the level signal that guarantees to adopt described voltage sampling apparatus can guarantee to sample and obtain is big or small constant.The polarity of the level signal of voltage sampling method assurance input a/d converter provided by the invention is identical with the polarity of the input end of A/D converter, thereby does not need to add that any datum causes the change of level signal size.Therefore, electrical level polar conversion device provided by the invention, voltage sampling apparatus and voltage sampling method can guarantee the size of the level signal that collects, thereby have guaranteed through the voltage sample precision after the A/D conversion.
Description of drawings
Fig. 1 is the structural representation of electrical level polar conversion device provided by the invention;
Fig. 2 is the structural representation of the controller of electrical level polar conversion device provided by the invention;
Fig. 3 is the structural representation of voltage sampling apparatus provided by the invention;
Fig. 4 is the connection diagram of voltage sampling apparatus provided by the invention and electric battery, switching network and switching network controller;
Fig. 5 is the structural representation of a kind of preferred implementation of voltage sampling apparatus provided by the invention;
Fig. 6 is the process flow diagram of a kind of embodiment of voltage sampling method provided by the invention;
Fig. 7 is for being the process flow diagram of a kind of preferred implementation of voltage sampling method provided by the invention.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing.
As shown in Figure 1, electrical level polar conversion device provided by the invention comprises switches set 5, described switches set 5 comprises first input end A, the second input end B, the first output terminal C, the second output terminal D and a plurality of gate-controlled switch, described first input end A is used for providing two signals that level is different to a plurality of gate-controlled switches with the second input end B, the first output terminal C is used for these two signals that level is different of output with the second output terminal D, this electrical level polar conversion device also comprises controller 6, described controller 6 respectively with first input end A, the second input end B with are connected gate-controlled switch and connect, level height for detection of the different signal of two level of first input end A and the second input end B, according to the switching of gate-controlled switch in the height gauge tap group 5 of described level signal, to guarantee being always plus or minus from the level difference value between the level signal of the first output terminal C of switches set 5 and the second output terminal D output.
Gate-controlled switch in the described switches set 5 has the on-off element of control end for any one, and its switching can be controlled by electric signal, for example diode, triode or relay.
Described a plurality of gate-controlled switch is a plurality of of arbitrary finite, such as 4-20.As shown in Figure 1, take the switch number as 4 as example, described switches set 5 comprises the first switch 1, second switch 2, the 3rd switch 3 and the 4th switch 4, the first switch 1 links to each other with the first input end A of described switches set 5 with the input end of the 3rd switch 3, second switch 2 links to each other with the second input end B of described switches set 5 with the 4th switch 4, the first switch 1 links to each other with the first output terminal C of described switches set 5 with the output terminal of the 4th switch, and second switch 2 links to each other with the second output terminal D of described switches set 5 with the output terminal of the 3rd switch 3.
Described controller 6 is used for controlling the open and close of described switches set 5 switches.Under the preferable case, as shown in Figure 2, described controller 6 comprises level signal collecting unit, level signal comparing unit and control module; Described level signal collecting unit and first input end A be connected input end B and be connected, for detection of the level signal of first input end A and the second input end B, two level signals that detect are sent to the level signal comparing unit; Described level signal comparing unit is used for the height of more described level signal, and comparative result is sent to control module; Described control module is connected with switch in the switches set 5, be used for the switching according to described comparative result gauge tap group 5 switches, to guarantee being always plus or minus from the level difference value between the level signal of the first output terminal C of switches set 5 and the second output terminal D output.
The control module of institute's controller 6 can be carried out the level difference value that makes between the level signal of the first output terminal C of switches set 5 and the second output terminal D output and be always positive program, take the quantity of switch as 4 as example, closed the first switch 1 and second switch 2 when the level signal of first input end A is higher than first input end B, disconnect the 3rd switch 3 and the 4th switch 4, when being lower than first input end B, the level signal of first input end A disconnects the first switch 1 and second switch 2, closed the 3rd switch 3 and the 4th switch 4.The control module of institute's controller 6 also can be carried out with above-mentioned opposite, make from the level difference value between the level signal of the first output terminal C of switches set 5 and the second output terminal D output and be always the negative control program, when being higher than first input end B, the level signal of first input end A disconnects the first switch 1 and second switch 2, closed the 3rd switch 3 and the 4th switch 4, closed the first switch 1 and second switch 2 disconnect the 3rd switch 3 and the 4th switch 4 when the level signal of first input end A is lower than first input end B.
Carrying out the level difference value that makes between the level signal of exporting from the first output terminal C and the second output terminal D of switches set 5 when the control module of described controller 6 just is always, or make when being always negative program from the level difference value between the level signal of the first output terminal C of switches set 5 and the second output terminal D output, the level signal collecting unit collection of described controller 6 is access in the level signal of first input end A and the second input end B, and level signal is sent to the level signal comparing unit, the level signal comparing unit sends the higher or lower electric signal of expression first input end A place level to control module, described control module receives this electric signal, control the first switch 1, second switch 2, the open and close of the 3rd switch 3 and the 4th switch 4, described switching situation makes a detailed description hereinbefore, does not do repeatedly at this and describes.
Described controller 6 is arbitrarily can be according to the indication of the program level signal access switches set 5 with two varying levels, and can according to the controller of the switching of switch in the indicating control switch group 5 of program, for example can be PLC or single-chip microcomputer.
Described device also comprises switching network controller 14, is used for two different signals of level at joint cell two ends being inputted described first input end A and the second input end B at every turn.
Described switching network controller 14 is the controller that can at every turn the different signal of two level at joint cell two ends be inputted according to the indication of program arbitrarily first input end A and the second input end B, for example can be PLC or single-chip microcomputer.
The controller 6 of described electrical level polar conversion device can be integrated into a control module with switching network controller 14, this control module can be realized according to the indication of program the switching of switch in the gauge tap group 5 and the function of at every turn the different signal of two level at joint cell two ends being inputted first input end A and the second input end B, described switching network controller 14 and controller 6 also can individualisms, realize control function separately.
Fig. 3 is the structural representation of voltage sampling apparatus provided by the invention.As shown in Figure 3, described voltage sampling apparatus comprises above-mentioned electrical level polar conversion device, described voltage sampling apparatus also comprises data processing equipment 10, described data processing equipment 10 has high level input end 11 and low level input end 12, be used for and input to data processing equipment 10 from the level signal of the first output terminal C and the second output terminal D output, and the level signal of input high level input end 11 always is higher than the level signal of input low level input end 12.
According to sampling apparatus provided by the invention, this device comprises above-mentioned electrical level polar conversion device and data processing equipment 10.Described data processing equipment 10 is for being converted to analog level signal arbitrarily the high-precision a/d converter of digital signal level, and the A/D converter ADS805 for having 12 precision under the preferable case can have higher sample rate.
Fig. 4 is the connection diagram of voltage sampling apparatus provided by the invention and electric battery, switching network and switching network controller.As shown in Figure 4, described electric battery 7 is connected in series by N joint cell and forms, described switching network 8 comprises tactic a plurality of switch 9, the positive and negative two ends of described each joint cell all connect respectively a switch 9, then the number of switch 9 Duos 1 than the cell number in the electric battery 7, is N+1.
Described switch 9 has the on-off element of control end for any one, and its switching can be controlled by electric signal, such as diode, triode or relay.
The signal output part parallel connection of described odd indexed switch 9 becomes the first output terminal E of switching network 8, and the signal output part parallel connection of the switch 9 of described even number sequence number becomes the second output terminal F of switching network 8, is used for the level signal at output one joint cell two ends.The first output terminal E of described switching network 8 is connected with the first input end A of the switches set 5 of electrical level polar conversion device, the second output terminal F of switching network 8 is connected with the second input end B of electrical level polar conversion device switches set 5, is used for the different signal input switch group 5 of two level with joint cell two ends.
When described voltage sampling apparatus carries out voltage sample, a particular moment, there is and only has a pair of adjacent switch 9 in the switching network 8 by closed simultaneously, and other switches 9 remain open state, so only there is the level signal at the joint cell two ends between adjacent two switches 9 of closure to be imported in the switches set 5 of electrical level polar conversion device, for example when closed the 1st switch 9 and the 2nd switch 9, only have the level signal at the 1st joint cell two ends to be access in to switches set 5, thereby described voltage sampling apparatus reaches the purpose of sampling by in the level signal access switches set 5 with each cell that is connected in series by the wherein a pair of adjacent switch 9 of closed N+1 the switch 9 of particular order.
Described switching network controller 14 is connected with switch 9, is used for the switching of gauge tap 9.Described switching network controller 14 namely has and only has a pair of adjacent switch 9 to be closed a particular moment with the switching of the mode gauge tap 9 of each first input end A with a joint cell two ends level signal input switch group 5 and the second input end B.
Under the preferable case, described voltage sampling apparatus also can comprise voltage protector 13, as shown in Figure 5.Described voltage protector 13 is parallel between the first input end A and the second input end B of described electrical level polar conversion device, for the level signal before input first input end A and the second input end B being kept in and cutting off DC current to protect described electrical level polar conversion device.
Described voltage sampling apparatus is mainly used in accumulator, and especially automobile storage battery is sampled.Because the electric weight of accumulator is very large, in sampling process, might impact handling safety and the sampling apparatus of sampling because electric weight is excessive.The capacitor of described voltage protector 13 for having charging and cutting off the DC current characteristic; be parallel between first input end A and the second input end B; the DC current of in sampling process, cutting off the sampling battery; input to again switches set 5 after simple magnitude of voltage temporarily stored through charging process, avoided excessive DC current to cause impact on handling safety and voltage sampling apparatus.Thereby described voltage protector 13 is for keeping in the voltage that its charging and discharging function obtains sampling arbitrarily the capacitor of protection electrical level polar conversion device, for example ceramic disc capacitor.
The battery voltage method of sampling provided by the invention comprises that each the piece cell to being connected in series in the electric battery carries out voltage sample, the level signal that collects is inputted data processing equipment 10 so that analog level signal is converted to digital signal level, this data processing equipment 10 has high level input end 11 and low level input end 12, the level signal of input high level input end 11 always is higher than the level signal of input low level input end 12, and the level signal of the level signal of input high level input end 11 and input low level input end 12 is identical with the level signal size that collects.
The height of the level signal that described method relatively collects, and the polarity of the level signal that collects is kept or reverse according to described comparative result.
Sampling employing order voltage sample method to battery voltage, the combinational logic timing control program that described switching network controller 14 is carried out corresponding to switch 9 states, at first begin successively the cell that is connected in series to be carried out voltage sample in order from the first segment cell, until final section cell, finish a sampling period, the first segment cell that beginning is got back in afterwards redirect carries out the voltage sample of a new round in order.
Described switching network controller 14 is carried out timing control program, the level signal at each the joint cell two ends that begins will be connected in series successively from the first segment cell inputs to switches set 5 until the final section cell, and the level signal collection that the first segment cell begins a new round is got back in afterwards redirect.When the sampling beginning, described switching network controller 14 at first inputs to switches set 5 with the level signal at first segment cell two ends, described switching network controller 14 sends a signal to switch 9, closed first switch 9 and second switch 9, disconnect rest switch 9, with the switches set 5 in the level signal access electrical level polar conversion device at first segment cell two ends in the electric battery 7; Because an end of first switch 9 is connected with first segment cell anode, the other end is connected to the first input end A of switches set 5, one end of second switch 9 is connected with second section cell negative terminal, the other end is connected to the second input end B of switches set 5, and then the level of described first input end A is higher than the second input end B; Described controller 6 is according to the open and close of performed programmed control the first switch 1, second switch 2, the 3rd switch 3 and the 4th switch 4, from the output terminal output level difference of switches set 5 be the level signal of plus or minus to data processing equipment:
When the output terminal output level difference from switches set 5 is timing, the first output terminal C is connected with the high level input end 11 of data processing equipment, the second output terminal D is connected with the low level input end 12 of data processing equipment, will inputs to data processing equipment from the level signal of switches set 5 outputs and carry out the data processing.
When from the output terminal output level difference of switches set 5 when negative, the first output terminal C is connected with the low level input end 12 of data processing equipment, the second output terminal D is connected with the high level input end 11 of data processing equipment, will inputs to data processing equipment from the level signal of switches set 5 outputs and carry out the data processing.
Through certain sampling time, described switching network controller 14 sends a signal to switch 9, closed second switch 9 and the 3rd switch 9 disconnect rest switch 9, with the switches set 5 in the level signal access electrical level polar conversion device at second section cell two ends in the electric battery 7; Because an end of second switch 9 is connected with second section cell negative terminal, the other end is connected to the second input end B of switches set 5, one end of the 3rd switch 9 is connected with second section cell anode, the other end also is connected to the first input end A of switches set 5, and then the level of described first input end A is lower than the second input end B; Described controller 6 is according to the open and close of performed programmed control the first switch 1, second switch 2, the 3rd switch 3 and the 4th switch 4, be that the level signal of plus or minus is to data processing equipment from the output terminal output level difference of switches set 5, described the first output terminal C be connected output terminal D and data processing equipment input end be connected to describe in detail hereinbefore, do not do being repeated in this description at this.
By that analogy, until the final section cell is finished a sampling period, in whole sampling period process, from the output terminal of switches set 5 always the output level difference be just or for negative level signal to described data processing equipment.
Fig. 6 is the process flow diagram of a kind of embodiment of above-mentioned voltage sampling method, the control module execution of described controller 6 makes from the level difference value between the level signal of the first output terminal C of switches set 5 and the second output terminal D output and is always positive program, detailed process is described in detail hereinbefore, does not do being repeated in this description at this.
Owing to adopt this order voltage sample method, begin in order successively each joint monomer battery voltage to the last joint cell of sampling from an end of the electric battery that is connected in series, finish redirect after a sampling period and get back to the voltage sample that the first segment cell of beginning carries out a new round in order.Jump to from the final section cell that relative voltage alters a great deal the sampling period transfer process of first segment cell, shorten easily the serviceable life of switch, even cause high-voltage breakdown.
Therefore, under the preferable case, the method of voltage sample that each the piece cell that is connected in series in the electric battery is carried out provided by the invention is at first beginning successively odd number joint cell to be carried out voltage sample from the first segment cell that is connected in series, until the highest odd number joint cell, then beginning oppositely successively from the highest even number joint cell, the several sections of cells of antithesis carry out voltage sample, until then minimum even number batteries begins new round voltage sample from the first segment cell.
Described switching network controller 14 can be carried out the combinational logic timing control program corresponding on off state, thereby can gather with specific order the level at each joint cell two ends.
The combinational logic timing control program that described switching network controller 14 is carried out corresponding on off state, at first to begin successively odd number joint cell to be carried out voltage sample from the first segment cell that is connected in series, until the highest odd number joint cell, then beginning oppositely successively from the highest even number joint cell, the several sections of cells of antithesis carry out voltage sample, until the inferior ordered pair cell of minimum even number batteries is sampled, each level signal that saves the cell two ends is inputed in the switches set 5.
Described control module is carried out timing control program, the level signal that begins successively the odd number joint cell two ends that will be connected in series from the first segment cell inputs to switches set 5 until the highest odd number joint cell, then begin the reverse level signal that successively even number is saved the cell two ends from the highest even number joint cell and input to switches set 5, until minimum even number joint cell begins the level signal access of a new round more again from the first segment cell; The control module execution of described controller 6 guarantees to be always from the level difference value between the level signal of the first output terminal C of switches set 5 and the second output terminal D output the program of plus or minus:
When the sampling beginning, described switching network controller 14 at first inputs to switches set 5 with the level signal at first segment cell two ends, described switching network controller 14 sends a signal to switch 9, closed first switch 9 and second switch 9, disconnect rest switch 9, with the switches set 5 in the level signal access electrical level polar conversion device at first segment cell two ends in the electric battery 7, this moment, the level of described first input end A was higher than the second input end B; Described controller 6 is according to the switching of programmed control first switch 1 of its execution, second switch 2, the 3rd switch 3, the 4th switch 4, be the level signal of plus or minus from the output terminal output level difference of switches set 5, and be connected with the input end of A/D converter according to its plus or minus.
Through certain sampling time, described switching network controller 14 sends a signal to switch 9, closed the 3rd switch 9 and the 4th switch 9, disconnect rest switch 9, with the switches set 5 in the level signal access electrical level polar conversion device at the 3rd joint cell two ends in the electric battery 7, then the level of described first input end A still is higher than the second input end B; Described controller 6 keeps the state of the first switch 1, second switch 2, the 3rd switch 3 and the 4 present open and close of the 4th switch according to performed program, be the level signal of plus or minus from the output terminal output level difference of switches set 5, and be connected with the input end of A/D converter according to its plus or minus.
By that analogy, until the highest odd number joint, namely N saves cell, and the first switch 1 in this process in the switches set 5 and second switch 2 remain closed or disconnect that the 3rd switch 3 and the 4th switch 4 remain closed or disconnect.
When the level signal of input switch group 5 is the level signal at N joint cell two ends, the control module of described controller 6 begins the reverse level signal that successively even number is saved the cell two ends from the highest even number joint cell and accesses to switches set 5, the control module of described controller 6 sends a signal to switch 9, the highest even number joint of closure, namely N-1 saves N switch 9 and N-1 switch 9 that the cell two ends connect, disconnect rest switch 9, with the switches set 5 in the level signal access electrical level polar conversion device at N-1 joint cell two ends in the electric battery 7, described controller 6 is according to performed programmed control the first switch 1, second switch 2, the switching of the 3rd switch 3 and the 4th switch 4, be the level signal of plus or minus from the output terminal output level difference of switches set 5, and be connected with the input end of A/D converter according to its plus or minus.
By that analogy, until lowest section namely the 2nd saves cell, the first switch 1 in this process in the switches set 5 and second switch 2 remain closed or disconnect that the 3rd switch 3 and the 4th switch 4 remain closed or disconnect, finished thus a sampling period.
When the level signal of access switches set 5 is minimum even number joint, namely during the level signal at second section cell two ends, described switching network controller 14 begins the level signal collection of a new round according to indication from the first segment cell.
Fig. 7 is the process flow diagram of a kind of embodiment of above-mentioned voltage sampling method, the control module execution of described controller 6 guarantees to be always positive program from the level difference value between the level signal of the first output terminal C of switches set 5 and the second output terminal D output, detailed process describes in detail hereinbefore, does not do being repeated in this description at this.
In each sampling period, the switching of the first switch 1 in the switches set 5, second switch 2, the 3rd switch 3 and the 4th switch 4 all a conversion once, and in the sampling period transfer process, the relative voltage between the switch 9 that the cell two ends connect changes the voltage that maximum only is two joint cells.
Claims (14)
1. electrical level polar conversion device, this electrical level polar conversion device comprises switches set (5), described switches set (5) comprises first input end (A), the second input end (B), the first output terminal (C), the second output terminal (D) and a plurality of gate-controlled switch, described first input end (A) is respectively applied to provide two signals that level is different with the second input end (B), the different signal of described two level is respectively transmitted to described the first output terminal (C) and the second output terminal (D) by the respective switch in described a plurality of gate-controlled switches respectively, this electrical level polar conversion device also comprises controller (6), described controller (6) respectively with first input end (A), the second input end (B) with are connected gate-controlled switch and connect, level signal for detection of first input end (A) and the second input end (B), height to the level signal that detects compares, according to the switching of a plurality of gate-controlled switches described in the comparative result gauge tap group (5), be always plus or minus with the level difference value between the level signal that guarantees to export from the first output terminal (C) and second output terminal (D) of switches set (5).
2. device according to claim 1 is characterized in that, described controller (6) comprises level signal collecting unit, level signal comparing unit and control module; Described level signal collecting unit and first input end (A) be connected input end (B) and be connected, the level signal for detection of first input end (A) and the second input end (B) is sent to the level signal comparing unit with the level signal that detects; Described level signal comparing unit is used for the height of more described level signal, and comparative result is sent to control module; Described control module is connected with a plurality of gate-controlled switches, be used for the switching according to a plurality of gate-controlled switches described in the described comparative result gauge tap group (5), be always plus or minus with the level difference value between the level signal that guarantees to export from the first output terminal (C) and second output terminal (D) of switches set (5).
3. device according to claim 2, it is characterized in that, described a plurality of gate-controlled switch comprises the first switch (1), second switch (2), the 3rd switch (3) and the 4th switch (4), the input end of the first switch (1) and the 3rd switch (3) links to each other with the first input end (A) of described switches set (5), second switch (2) links to each other with second input end (B) of described switches set (5) with the 4th switch (4), the output terminal of the first switch (1) and the 4th switch (4) links to each other with first output terminal (C) of described switches set (5), and the output terminal of second switch (2) and the 3rd switch (3) links to each other with second output terminal (D) of described switches set (5); Described control module is used for controlling the switching of the first switch (1) and the 3rd switch (3) and the switching of second switch (2) and the 4th switch (4) according to described comparative result, and the level difference value between the level signal of exporting from the first output terminal (C) and second output terminal (D) of switches set (5) with assurance is always plus or minus.
4. device according to claim 1, it is characterized in that, described a plurality of gate-controlled switch comprises the first switch (1), second switch (2), the 3rd switch (3) and the 4th switch (4), the first switch (1) links to each other with the first input end (A) of described switches set (5) with the input end of the 3rd switch (3), second switch (2) links to each other with second input end (B) of described switches set (5) with the 4th switch (4), the first switch (1) links to each other with first output terminal (C) of described switches set (5) with the output terminal of the 4th switch (4), and second switch (2) links to each other with second output terminal (D) of described switches set (5) with the output terminal of the 3rd switch (3); Described controller (6) is for detection of the level height of first input end (A) signal different with two level of the second input end (B), control the switching of the first switch (1) and the 3rd switch (3) and the switching of second switch (2) and the 4th switch (4) according to the height of described level signal, be always plus or minus with the level difference value between the level signal that guarantees to export from the first output terminal (C) and second output terminal (D) of switches set (5).
5. the described device of any one according to claim 1-4, it is characterized in that, described device also comprises switching network controller (14), is used for two different signals of level at joint cell two ends being inputted described first input end (A) and the second input end (B) at every turn.
6. the described device of any one is characterized in that according to claim 1-4, and described a plurality of gate-controlled switches are diode, triode or relay.
7. voltage sampling apparatus, this device comprises electrical level polar conversion device, it is characterized in that, described electrical level polar conversion device is the described device of any one among the claim 1-6.
8. device according to claim 7, it is characterized in that, this device also comprises data processing equipment (10), this data processing equipment (10) has high level input end (11) and low level input end (12), described high level input end (11) is connected 12 with the low level input end) respectively with described the first output terminal (C) be connected output terminal (D) and be connected, be used for and input to data processing equipment (10) from the level signal of the first output terminal (C) and the second output terminal (D) output, and the level signal of input high level input end (11) always is higher than the level signal of input low level input end (12).
9. device according to claim 8 is characterized in that, described data processing equipment (10) is A/D converter.
10. according to claim 8 or 9 described devices; it is characterized in that; this device also comprises voltage protector (13); described voltage protector (13) is parallel between first input end (A) and the second input end (B), is used for input first input end (A) and the second input end (B) level signal are before kept in and cut off DC current to protect described electrical level polar conversion device.
11. device according to claim 10 is characterized in that, described voltage protector (13) is capacitor.
12. battery voltage method of sampling, the method comprises that each the piece cell to being connected in series in the electric battery carries out voltage sample, the level signal that collects is inputted data processing equipment (10) so that analog level signal is converted to digital signal level, this data processing equipment (10) has high level input end (11) and low level input end (12), it is characterized in that, the level signal of input high level input end (11) always is higher than the level signal of input low level input end (12), and the level signal of the level signal of input high level input end (11) and input low level input end (12) is identical with the level signal size that collects; Wherein, the method that gathers level signal is the height of the level signal that relatively collects, and the polarity of the level signal that collects is kept or reverses according to described comparative result.
13. method according to claim 12, it is characterized in that, each the piece cell that is connected in series in the electric battery is carried out the method for voltage sample at first beginning successively odd number joint cell to be carried out voltage sample from the first segment cell that is connected in series, until the highest odd number joint cell, then begin oppositely successively from the highest even number joint cell that the several sections of cells of antithesis carry out voltage sample, until minimum even number batteries.
14. method according to claim 12 is characterized in that, described method also comprises: the voltage protection step, the level signal that collects kept in and cut off DC current after compare again.
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| CN2007101432746A CN101363879B (en) | 2007-08-09 | 2007-08-09 | Electrical level polar conversion device, electric voltage sampling apparatus and electric voltage sampling method |
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| CN2007101432746A CN101363879B (en) | 2007-08-09 | 2007-08-09 | Electrical level polar conversion device, electric voltage sampling apparatus and electric voltage sampling method |
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| CN101363879B true CN101363879B (en) | 2013-03-20 |
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| CN101915868B (en) * | 2010-07-14 | 2012-07-18 | 中国科学院电工研究所 | Acquisition circuit for improving acquisition precision of voltage signal |
| CN104049135B (en) * | 2014-06-24 | 2017-06-13 | 湖南金杯新能源发展有限公司 | Series-type voltage source voltage measuring apparatus |
| DE102017121441A1 (en) * | 2017-09-15 | 2019-03-21 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Protection circuit for a charging device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1138768A (en) * | 1995-06-20 | 1996-12-25 | 明碁电脑股份有限公司 | Battery charger |
| CN1535384A (en) * | 2001-05-29 | 2004-10-06 | Fuel cell votage monitoring system and its method | |
| CN2791738Y (en) * | 2004-04-16 | 2006-06-28 | 美国凹凸微系有限公司 | Circuit for monitoring cell electricity quantity |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1138768A (en) * | 1995-06-20 | 1996-12-25 | 明碁电脑股份有限公司 | Battery charger |
| CN1535384A (en) * | 2001-05-29 | 2004-10-06 | Fuel cell votage monitoring system and its method | |
| CN2791738Y (en) * | 2004-04-16 | 2006-06-28 | 美国凹凸微系有限公司 | Circuit for monitoring cell electricity quantity |
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