CN204807623U - Acquisition circuit and contain this acquisition circuit's battery management system - Google Patents
Acquisition circuit and contain this acquisition circuit's battery management system Download PDFInfo
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- CN204807623U CN204807623U CN201520517708.4U CN201520517708U CN204807623U CN 204807623 U CN204807623 U CN 204807623U CN 201520517708 U CN201520517708 U CN 201520517708U CN 204807623 U CN204807623 U CN 204807623U
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Abstract
The utility model provides an acquisition circuit and contain this acquisition circuit's battery management system, wherein acquisition circuit includes the difference unit, gathers power battery's current signal to be first current signal and second current signal with the current signal difference, the voltage/current signal processing circuit unit, including a first current signal end and a second current signal end, first current signal end and second current signal are held and are received first current signal and second current signal respectively, with first current signal and second current signal through the current -limiting, fall and make an uproar, transmit respectively to the treater after the filtering, digital analog conversion. Because interfering signal generally exists with the common mode form, the utility model discloses acquisition circuit through being the current signal difference first current signal and second current signal, can eliminate common mode interference, need not to adopt the electric current hall sensor of high accuracy can be with signal transmission to the treater of high accuracy, low noise, acquires power battery's accurate current value.
Description
Technical field
The utility model relates to technical field of battery management, relates in particular to a kind of Acquisition Circuit and comprises the battery management system of this Acquisition Circuit.
Background technology
The magnitude of voltage of battery management system medium power battery, current value, insulation resistance value three parameters are most important, wherein magnitude of voltage and current value calculate electrokinetic cell dump energy (StateOfCharge, be called for short SOC) direct basis data, and dump energy refers to that the available power in electrokinetic cell accounts for the ratio of nominal capacity, be an important monitor data in battery management system, the duty of electrokinetic cell can be controlled according to dump energy; Insulation resistance value is used for analyzing the insulating property between electrokinetic cell and car body, once there is the fault that insulating property lost efficacy or reduced, then can disconnect the electrical connection between electrokinetic cell and car body, ensure the safe handling of car load.
Battery management system gathers the current signal of electrokinetic cell by current Hall sensor.Current Hall sensor, based on magnetic balance type hall principle, can measure the current signal of electrokinetic cell indirectly by the size measuring Hall voltage.The electric current of inflow current Hall element needs insulation isolation transfer process through electricity-magnetic-electricity and outputting power cell current value, and measuring process is vulnerable to external interference and causes the distortion of signal, the precision that impact is measured.
Utility model content
For this reason, technical problem to be solved in the utility model how to improve the measuring accuracy of electrokinetic cell current value.
For solving the problems of the technologies described above, the technical solution of the utility model is as follows:
The utility model provides a kind of Acquisition Circuit, comprising:
Difference unit, gathers the current signal of electrokinetic cell, and is the first current signal and the second current signal by described current signal difference;
Current signal processing unit, comprise the first current signal end and the second current signal end, described first current signal end and described second current signal end receive described first current signal and described second current signal respectively, and described first current signal and described second current signal are transferred to processor respectively after current limliting, noise reduction, filtering, analog-to-digital conversion process.
Acquisition Circuit described in the utility model, described difference unit comprises shunt, be arranged on the circuit board at described Acquisition Circuit place, described shunt comprises collection terminal, the first differential ends and the second differential ends, total negative pole of described collection terminal and described electrokinetic cell couples, and described first differential ends and described second differential ends couple with described first current signal end and described second current signal end respectively.
Acquisition Circuit described in the utility model, described shunt is also provided with one or more temperature output terminal, one or more the detecting temperature on output steering device.
Acquisition Circuit described in the utility model, also comprises:
First voltage acquisition unit, from the total cathode voltage signal of total positive pole collection of described electrokinetic cell, and exports described total cathode voltage signal as the first voltage signal after divider resistance voltage division processing;
Second voltage acquisition unit, the load end coupled from the total positive pole with described electrokinetic cell gathers load terminal voltage signal, and is exported as the second voltage signal after divider resistance voltage division processing by described load terminal voltage signal;
Voltage signal processing unit, comprise the first voltage signal end and the second voltage signal end, described first voltage signal end and described second voltage signal end receive described first voltage signal and described second voltage signal respectively, and described first voltage signal and described second voltage signal are transferred to described processor respectively after dividing potential drop, noise reduction, filtering, analog-to-digital conversion process.
Acquisition Circuit described in the utility model, also comprises:
Insulation resistance value collecting unit, comprise the first collection terminal and the second collection terminal, described first collection terminal and described second collection terminal receive total cathode voltage signal of described electrokinetic cell and total cathode voltage signal respectively, and described total cathode voltage signal and described total cathode voltage signal are exported as positive insulation reference voltage signal and negative insulation reference voltage signal after being series at a plurality of resistance step-downs between described first collection terminal and described second collection terminal, total resistance of described resistance in series is adjustable;
Insulating signal processing unit, comprise the first signal receiving end and secondary signal receiving end, described first signal receiving end and described secondary signal receiving end receive described positive insulation reference voltage signal and described negative insulation reference voltage signal respectively, and described positive insulation reference voltage signal and described negative insulation reference voltage signal are transferred to described processor respectively after dividing potential drop, noise reduction, filtering, analog-to-digital conversion process.
Acquisition Circuit described in the utility model, described insulation resistance value collecting unit comprises: the first opto-coupler chip U5, the second opto-coupler chip U6, the first resistance R43, the second resistance R44, the 3rd resistance R45, the 4th resistance R47, the 5th resistance R48, the 6th resistance R49, the 7th resistance R50, the 8th resistance R51, the first sampling resistor R36 and the second sampling resistor R37;
Wherein said first resistance R43, described second resistance R44, described 3rd resistance R45, described 4th resistance R47, described first sampling resistor R36, described second sampling resistor R37, described 5th resistance R48, described 6th resistance R49, in sequential series between described 7th resistance R50 and described 8th resistance R51, one end that described first resistance R43 does not couple with described second resistance R44 is the first collection terminal of described insulation resistance value collecting unit, receive total cathode voltage signal of described electrokinetic cell, one end that described 8th resistance R51 does not couple with described 7th resistance R50 is the second collection terminal of described insulation resistance value collecting unit, receive total cathode voltage signal of described electrokinetic cell,
Described 3rd resistance R45 is in parallel with the light-receiving device of described first opto-coupler chip U5, and described 6th resistance R49 is in parallel with the light-receiving device of described second opto-coupler chip U6;
One end that described positive insulation reference voltage signal does not couple with described second sampling resistor R37 via described first sampling resistor R36 exports, and one end that described negative insulation reference voltage signal does not couple with described first sampling resistor R36 via described second sampling resistor R37 exports.
The utility model additionally provides a kind of battery management system, comprising:
Above-mentioned Acquisition Circuit;
Processor, receives the data that described Acquisition Circuit exports, at least obtains the current value of described electrokinetic cell accordingly;
CAN communication unit, receives the data of described processor output and transfers to entire car controller;
Power supply unit, powers to described Acquisition Circuit, described processor and described CAN communication unit.
Technique scheme of the present utility model has the following advantages compared to existing technology:
(1) the utility model provides a kind of Acquisition Circuit, comprises difference unit, gathers the current signal of electrokinetic cell, and is the first current signal and the second current signal by described current signal difference; Current signal processing unit, comprise a first current signal end and a second current signal end, receive described first current signal and described second current signal respectively, described first current signal and described second current signal are transferred to processor respectively after current limliting, noise reduction, filtering, analog-to-digital conversion process.Because undesired signal generally exists with common mode form, Acquisition Circuit described in the utility model, by being the first current signal and the second current signal by current signal difference, common mode interference can be eliminated, improve the signal to noise ratio (S/N ratio) of signal, again by the signal that processor can identify just can be converted to after the further current limliting of current signal processing unit, noise reduction, filtering, analog-to-digital conversion process, by the Signal transmissions of high precision, low noise to processor, the accurate current value of electrokinetic cell can be obtained without the need to adopting high-precision current Hall sensor.
(2) Acquisition Circuit described in the utility model, shunt is arranged on the circuit board at Acquisition Circuit place, without the need to unnecessary signal wire and middle line, differentiated first current signal and the second current signal can directly enter current signal processing unit, reduce the long pressure drop that causes of circuit and noise, the signal that collects can be made more accurate.
(3) the utility model additionally provides a kind of battery management system comprising above-mentioned Acquisition Circuit, processor just can get high precision from Acquisition Circuit, the data of low noise, just at least can calculate the accurate current value of electrokinetic cell accordingly, if comprise the data for calculating voltage value and/or insulation resistance value, also magnitude of voltage and/or insulation resistance value can be calculated accordingly, and by CAN communication unit by the current value of electrokinetic cell, magnitude of voltage and insulation resistance value send to entire car controller, ensure that entire car controller can understand the running status of electrokinetic cell in real time accurately, corresponding measure can be taked in time when electrokinetic cell breaks down, ensure that the safety of driving.
Accompanying drawing explanation
In order to make content of the present utility model be more likely to be clearly understood, below according to specific embodiment of the utility model also by reference to the accompanying drawings, the utility model is described in further detail, wherein
Fig. 1 is the structured flowchart of Acquisition Circuit described in the utility model;
Fig. 2 is the inner structure schematic diagram of shunt described in the utility model;
Fig. 3 is shunt position view on circuit boards in Acquisition Circuit described in the utility model;
Fig. 4 is the circuit theory diagrams of insulation resistance value collecting unit in Acquisition Circuit described in the utility model;
Fig. 5 is the structured flowchart of battery management system described in the utility model.
In figure, Reference numeral is expressed as: 1-difference unit, 2-current signal processing unit, 3-first voltage acquisition unit, 4-second voltage acquisition unit, 5-voltage signal processing unit, 6-insulation resistance value collecting unit, 7-insulating signal processing unit, 11-shunt, 1a-Acquisition Circuit, 2a-processor, 3a-CAN communication unit, 4a-power supply unit.
Embodiment
Embodiment 1
Present embodiments provide a kind of Acquisition Circuit, as shown in Figure 1, comprising: a difference unit 1 and a current signal processing unit 2.Wherein difference unit 1 gathers the current signal of electrokinetic cell, and is the first current signal and the second current signal by current signal difference.Current signal processing unit 2, comprise a first current signal end and a second current signal end, first current signal end and the second current signal end receive the first current signal and the second current signal respectively, and the first current signal and the second current signal are transferred to processor respectively after current limliting, noise reduction, filtering, analog-to-digital conversion process.
Particularly, current signal processing unit 2 can to adopt in prior art any have current limliting, noise reduction, filtering, analog-digital conversion function circuit realize current limliting to the first current signal and the second current signal, noise reduction, filtering and analog-to-digital conversion process, be converted to the signal that processor can identify.Dividing potential drop current limliting is carried out as by resistance in series in circuit, filter peak voltage carry out noise reduction process by accessing transient voltage killer tube in circuit, carrying out filtering process by accessing one or more electric capacity in circuit, by modulus conversion chip, simulating signal being converted to digital signal etc.Above-mentioned device has with low cost and that effect is good advantage, can also obtain good treatment effect while reducing costs.
Preferably, as shown in Figure 1, Figure 2 and Figure 3, difference unit 1 can comprise a shunt 11, be arranged on the circuit board at Acquisition Circuit place, shunt 11 can comprise a collection terminal, first differential ends and second differential ends, total negative pole of collection terminal and electrokinetic cell couples, and the first differential ends and the second differential ends couple with the first current signal end and the second current signal end respectively.
Particularly, the inner structure of shunt 11 as shown in Figure 2, p00 port is the collection terminal of shunt 11, p001 port and p002 port are respectively the first differential ends and the second differential ends, can see there is a small resistor r between the first differential ends and the second differential ends, shunt 11 is generally series at load, in the loop at electrokinetic cell place, electric current flows through small resistor r, will make to produce pressure drop between the first differential ends and the second differential ends, thus be the first current signal and the second current signal by the current signal difference of electrokinetic cell, the first current signal end and the second current signal end of current signal processing unit is transferred to respectively through the first differential ends and the second differential ends, eliminate the common mode interference of current signal.Total negative pole of the collection terminal of shunt 11 and electrokinetic cell is coupled, electrokinetic cell high voltage can be avoided the damage of shunt 11, extend the serviceable life of shunt 11.
Separately, as shown in Figure 3, by shunt 11 being arranged on the circuit board at Acquisition Circuit place, without the need to unnecessary signal wire and middle line, differentiated first current signal and the second current signal can directly enter current signal processing unit 2, reduce the long pressure drop that causes of circuit and noise, the signal that collects can be made more accurate.
Preferably, shunt 11 can also be provided with one or more temperature output terminal, for the detecting temperature of one or more on output steering device 11.
As shown in Figure 3, P003 end and P004 end can as the temperature output terminals of shunt 11, temperature signal is converted to through digital temperature observing and controlling chip the electric signal that processor can identify, be convenient to the temperature value on processor Real-time Obtaining shunt, carry out temperature drift to circuit to correct, further ensure the precision of measuring-signal.
Preferably, the Acquisition Circuit of the present embodiment can also comprise:
First voltage acquisition unit 3, from the total cathode voltage signal of total positive pole collection of electrokinetic cell, and exports total cathode voltage signal as the first voltage signal after divider resistance voltage division processing.
Second voltage acquisition unit 4, the load end coupled from the total positive pole with electrokinetic cell gathers load terminal voltage signal, and is exported as the second voltage signal after divider resistance voltage division processing by load terminal voltage signal.
A voltage signal processing unit 5, comprise first voltage signal end and second voltage signal end, first voltage signal end and the second voltage signal end receive the first voltage signal and the second voltage signal respectively, and the first voltage signal and the second voltage signal are transferred to processor respectively after dividing potential drop, noise reduction, filtering, analog-to-digital conversion process.
Particularly, the first voltage acquisition unit 3 and the second voltage acquisition unit 4 can carry out dividing potential drop by resistance in series, prevent the damage that the high voltage of electrokinetic cell causes chip.Voltage signal processing unit 5 can to adopt in prior art any one have dividing potential drop, noise reduction, filtering, analog-to-digital conversion process function circuit realize dividing potential drop to the first voltage signal and the second voltage signal, noise reduction, filtering, analog-to-digital conversion process, cost is low, and precision is high.The total positive pole gathering electrokinetic cell respectively by the first voltage acquisition unit 3 and the second voltage acquisition unit 4 and the voltage signal of load end coupled with total positive pole of electrokinetic cell, and processor is transferred to respectively after voltage signal processing unit 5 carries out dividing potential drop, noise reduction, filtering, analog-to-digital conversion process to the first voltage signal and the second voltage signal, just can provide the reaction power battery-end of high precision low noise and the reference data of load terminal voltage situation to processor.
Preferably, the Acquisition Circuit of the present embodiment can also comprise:
An insulation resistance value collecting unit 6, comprise first collection terminal and second collection terminal, first collection terminal and the second collection terminal receive total cathode voltage signal of electrokinetic cell and total cathode voltage signal respectively, and total cathode voltage signal and total cathode voltage signal are exported as positive insulation reference voltage signal and negative insulation reference voltage signal after being series at a plurality of resistance step-downs between the first collection terminal and the second collection terminal, total resistance of resistance in series is adjustable.
An insulating signal processing unit 7, comprise first signal receiving end and a secondary signal receiving end, first signal receiving end and secondary signal receiving end receive positive insulation reference voltage signal and negative insulation reference voltage signal respectively, and positive insulation reference voltage signal and negative insulation reference voltage signal are transferred to processor respectively after dividing potential drop, noise reduction, filtering, analog-to-digital conversion process.
Particularly, insulating signal processing unit 7 can select in prior art have arbitrarily dividing potential drop, noise reduction, filtering, analog-digital conversion function circuit realize aligning the step-down of insulation reference voltage signal and negative insulation reference voltage signal, noise reduction, filtering, analog-to-digital conversion process, cost is low, and controllability is high.Because total resistance of resistance in series is adjustable, multiple values of positive insulation reference voltage signal and negative insulation reference voltage signal can be obtained, processor is according to reference datas different in resistance adjustment situation, just can calculate the insulation resistance value of electrokinetic cell, calculating about insulation resistance value belongs to prior art, repeats no more.
Preferably, as shown in Figure 4, insulation resistance value collecting unit 6 can comprise: the first opto-coupler chip U5, the second opto-coupler chip U6, the first resistance R43, the second resistance R44, the 3rd resistance R45, the 4th resistance R47, the 5th resistance R48, the 6th resistance R49, a 7th resistance R50, the 8th resistance R51, a first sampling resistor R36 and second sampling resistor R37.
Wherein in sequential series between the first resistance R43, the second resistance R44, the 3rd resistance R45, the 4th resistance R47, the first sampling resistor R36, the second sampling resistor R37, the 5th resistance R48, the 6th resistance R49, the 7th resistance R50 and the 8th resistance R51.One end that first resistance R43 does not couple with the second resistance R44 is the first collection terminal of insulation resistance value collecting unit 6, receive total cathode voltage signal of electrokinetic cell, one end that 8th resistance R51 does not couple with the 7th resistance R50 is the second collection terminal of insulation resistance value collecting unit 6, receives total cathode voltage signal of electrokinetic cell.
3rd resistance R45 is in parallel with the light-receiving device of the first opto-coupler chip U5, and the 6th resistance R49 is in parallel with the light-receiving device of the second opto-coupler chip U6.
One end that positive insulation reference voltage signal does not couple with the second sampling resistor R37 via the first sampling resistor R36 exports, and one end that negative insulation reference voltage signal does not couple with the first sampling resistor R36 via the second sampling resistor R37 exports.
Particularly, when the light-receiving device conducting of the first opto-coupler chip U5, the 3rd resistance R45 by short circuit, when the first opto-coupler chip U5 light-receiving device cut-off time, the 3rd resistance R45 place in circuit.In like manner, the 6th resistance R49 controls short circuit or place in circuit by the second opto-coupler chip U6.First opto-coupler chip U5, the second opto-coupler chip U6 then export control signal by processor and control its light-receiving device conducting or cut-off, because opto-coupler chip has buffer action to signal, signal to noise ratio (S/N ratio) is high, avoid the maloperation of access or bypass, control precisely.
Total cathode voltage signal of electrokinetic cell is drawn after the first resistance R43, the second resistance R44, the 3rd resistance R45 (bypass or access two states) and the 4th resistance R47 dividing potential drop, and total cathode voltage signal of electrokinetic cell is drawn after the 8th resistance R51, the 7th resistance R50, the 6th resistance R49 (bypass or access two states) and the 5th resistance R48 dividing potential drop.Avoid the high voltage of electrokinetic cell to the damage of the devices such as chip.
The present embodiment Acquisition Circuit, by being the first current signal and the second current signal by current signal difference, common mode interference can be eliminated, improve the signal to noise ratio (S/N ratio) of signal, again by the signal that processor can identify just can be converted to after the further current limliting of current signal processing unit, noise reduction, filtering, analog-to-digital conversion process, by the Signal transmissions of high precision, low noise to processor, the accurate current value of electrokinetic cell can be obtained without the need to adopting high-precision current Hall sensor.
Embodiment 2
Present embodiments provide a kind of battery management system, as shown in Figure 5, comprising:
The Acquisition Circuit 1a of an embodiment 1;
A processor 2a, receives the data that Acquisition Circuit 1a exports, at least obtains the current value of electrokinetic cell accordingly;
The data that a CAN communication unit 3a, receiving processor 2a export also transfer to entire car controller;
A power supply unit 4a, powers to Acquisition Circuit 1a, processor 2a and CAN communication unit 3a.
Particularly, processor 2a just can get high precision from Acquisition Circuit 1a, the data of low noise, at least can calculate the accurate current value of electrokinetic cell accordingly, if comprise the data for calculating voltage value and/or insulation resistance value, also magnitude of voltage and/or insulation resistance value can be calculated accordingly, and by CAN communication unit 3a by the current value of electrokinetic cell, magnitude of voltage and insulation resistance value send to entire car controller, ensure that entire car controller can understand the running status of electrokinetic cell in real time accurately, corresponding measure can be taked in time when electrokinetic cell breaks down, ensure that the safety of driving.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of extending out or variation be still among the protection domain that the utility model creates.
Claims (7)
1. an Acquisition Circuit, is characterized in that, comprising:
Difference unit (1), gathers the current signal of electrokinetic cell, and is the first current signal and the second current signal by described current signal difference;
Current signal processing unit (2), comprise the first current signal end and the second current signal end, described first current signal end and described second current signal end receive described first current signal and described second current signal respectively, and described first current signal and described second current signal are transferred to processor respectively after current limliting, noise reduction, filtering, analog-to-digital conversion process.
2. Acquisition Circuit according to claim 1, it is characterized in that, described difference unit (1) comprises shunt (11), be arranged on the circuit board at described Acquisition Circuit place, described shunt (11) comprises collection terminal, the first differential ends and the second differential ends, total negative pole of described collection terminal and described electrokinetic cell couples, and described first differential ends and described second differential ends couple with described first current signal end and described second current signal end respectively.
3. Acquisition Circuit according to claim 2, is characterized in that, described shunt (11) is also provided with one or more temperature output terminal, for one or more the detecting temperature on output steering device (11).
4. Acquisition Circuit according to claim 1, characterized by further comprising:
First voltage acquisition unit (3), from the total cathode voltage signal of total positive pole collection of described electrokinetic cell, and exports described total cathode voltage signal as the first voltage signal after divider resistance voltage division processing;
Second voltage acquisition unit (4), the load end coupled from the total positive pole with described electrokinetic cell gathers load terminal voltage signal, and is exported as the second voltage signal after divider resistance voltage division processing by described load terminal voltage signal;
Voltage signal processing unit (5), comprise the first voltage signal end and the second voltage signal end, described first voltage signal end and described second voltage signal end receive described first voltage signal and described second voltage signal respectively, and described first voltage signal and described second voltage signal are transferred to described processor respectively after dividing potential drop, noise reduction, filtering, analog-to-digital conversion process.
5. Acquisition Circuit according to claim 1, characterized by further comprising:
Insulation resistance value collecting unit (6), comprise the first collection terminal and the second collection terminal, described first collection terminal and described second collection terminal receive total cathode voltage signal of described electrokinetic cell and total cathode voltage signal respectively, and described total cathode voltage signal and described total cathode voltage signal are exported as positive insulation reference voltage signal and negative insulation reference voltage signal after being series at a plurality of resistance step-downs between described first collection terminal and described second collection terminal, total resistance of described resistance in series is adjustable;
Insulating signal processing unit (7), comprise the first signal receiving end and secondary signal receiving end, described first signal receiving end and described secondary signal receiving end receive described positive insulation reference voltage signal and described negative insulation reference voltage signal respectively, and described positive insulation reference voltage signal and described negative insulation reference voltage signal are transferred to described processor respectively after dividing potential drop, noise reduction, filtering, analog-to-digital conversion process.
6. Acquisition Circuit according to claim 5, it is characterized in that, described insulation resistance value collecting unit (6) comprising: the first opto-coupler chip (U5), the second opto-coupler chip (U6), the first resistance (R43), the second resistance (R44), the 3rd resistance (R45), the 4th resistance (R47), the 5th resistance (R48), the 6th resistance (R49), the 7th resistance (R50), the 8th resistance (R51), the first sampling resistor (R36) and the second sampling resistor (R37);
Wherein said first resistance (R43), described second resistance (R44), described 3rd resistance (R45), described 4th resistance (R47), described first sampling resistor (R36), described second sampling resistor (R37), described 5th resistance (R48), described 6th resistance (R49), in sequential series between described 7th resistance (R50) and described 8th resistance (R51), one end that described first resistance (R43) does not couple with described second resistance (R44) is the first collection terminal of described insulation resistance value collecting unit (6), receive total cathode voltage signal of described electrokinetic cell, one end that described 8th resistance (R51) does not couple with described 7th resistance (R50) is the second collection terminal of described insulation resistance value collecting unit (6), receive total cathode voltage signal of described electrokinetic cell,
Described 3rd resistance (R45) is in parallel with the light-receiving device of described first opto-coupler chip (U5), and described 6th resistance (R49) is in parallel with the light-receiving device of described second opto-coupler chip (U6);
One end that described positive insulation reference voltage signal does not couple with described second sampling resistor (R37) via described first sampling resistor (R36) exports, and one end that described negative insulation reference voltage signal does not couple with described first sampling resistor (R36) via described second sampling resistor (R37) exports.
7. a battery management system, is characterized in that, comprising:
The arbitrary described Acquisition Circuit (1a) of claim 1-6;
Processor (2a), receives the data that described Acquisition Circuit (1a) exports, at least obtains the current value of described electrokinetic cell accordingly;
CAN communication unit (3a), receives data that described processor (2a) exports and transfers to entire car controller;
Power supply unit (4a), powers to described Acquisition Circuit (1a), described processor (2a) and described CAN communication unit (3a).
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| CN107589291A (en) * | 2016-07-06 | 2018-01-16 | 深圳市沃特玛电池有限公司 | Electric automobile current detecting system and method |
| CN107843856A (en) * | 2017-12-14 | 2018-03-27 | 成都隆航科技有限公司 | Total voltage Acquisition Circuit in battery equalization system |
| CN108847871A (en) * | 2018-06-06 | 2018-11-20 | 阳光电源股份有限公司 | Communicating circuit and communication system applied to cascaded multilevel inverter |
| CN108847871B (en) * | 2018-06-06 | 2021-06-11 | 阳光电源股份有限公司 | Communication circuit and communication system applied to cascade multilevel inverter |
| CN109204062A (en) * | 2018-09-26 | 2019-01-15 | 东莞塔菲尔新能源科技有限公司 | The system and its monitoring method of a kind of real-time monitoring electric current, remaining capacity and insulation performance |
| CN109696576A (en) * | 2019-02-25 | 2019-04-30 | 珠海格力电器股份有限公司 | Current sampling circuit, method, air conditioning frequency converter and air-conditioning |
| CN112394829A (en) * | 2019-08-15 | 2021-02-23 | 联咏科技股份有限公司 | Signal processing apparatus and touch display apparatus thereof |
| CN114421580A (en) * | 2022-03-30 | 2022-04-29 | 北京胜能能源科技有限公司 | Control device and control method for realizing butt joint of power battery and energy storage system |
| CN115556586A (en) * | 2022-10-11 | 2023-01-03 | 江苏欧力特能源科技有限公司 | Battery module electric quantity estimation device |
| CN115556586B (en) * | 2022-10-11 | 2023-08-22 | 江苏欧力特能源科技有限公司 | Battery module electric quantity estimation device |
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