CN115372847A - Control device and method of battery test equipment - Google Patents
Control device and method of battery test equipment Download PDFInfo
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- CN115372847A CN115372847A CN202211316756.8A CN202211316756A CN115372847A CN 115372847 A CN115372847 A CN 115372847A CN 202211316756 A CN202211316756 A CN 202211316756A CN 115372847 A CN115372847 A CN 115372847A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
Abstract
The application provides a control device and a method of battery test equipment, the device comprises a feedback unit used for: when the target current of the battery test equipment is in a stable state, obtaining a first feedback signal according to the filtered and error-calibrated target current; the target current is the current detected by a Hall current sensor of the battery test equipment; when the target current is in an unsteady state, obtaining a second feedback signal according to the target current; and a generating unit for generating a driving signal for controlling the battery test apparatus according to the first feedback signal or the second feedback signal. According to the scheme, the test equipment is controlled according to the target current after filtering and correcting errors in a steady state, and the test equipment is directly controlled according to the target current in an unsteady state, so that the requirement of quick response in the unsteady state and the requirement of improving the test precision in the steady state are compatible.
Description
Technical Field
The invention relates to the technical field of battery testing, in particular to a control device and a control method of battery testing equipment.
Background
In the field Of battery testing, the requirement on the measurement accuracy Of the State Of Charge (SOC) Of a battery is higher and higher, and therefore, higher requirements are put forward on the current and voltage test accuracy Of battery testing equipment.
One conventional method for improving the test accuracy is to detect a current signal during a test using a conventional hall sensor, calibrate the current signal, and perform feedback adjustment on a battery test device according to the calibrated current signal. However, the battery test equipment belongs to a switching power supply circuit, so that a triangular wave is superposed in a detected current signal, and the calibration of the current signal is only effective when a specific battery is tested and has no universality.
One way to solve this problem is to filter the current signal before calibration and then calibrate the filtered current signal based on the above method, but the filtering introduces a phase delay in the filtered current signal, and particularly the phase delay is severe when the filtered signal changes rapidly, so that the battery test equipment cannot respond rapidly when the current signal changes rapidly, and a large overshoot exists in the test process, which makes it difficult to test complex working conditions.
Disclosure of Invention
In view of the above drawbacks of the prior art, the present invention provides a control apparatus and method for a battery test device to provide a battery test scheme satisfying both high accuracy and fast response.
The present application provides in a first aspect a control apparatus for a battery test device, including:
a feedback unit to:
when the target current of the battery test equipment is in a stable state, obtaining a first feedback signal according to the filtered and error-calibrated target current; wherein the target current is a current detected by a Hall current sensor of the battery test equipment;
when the target current is in an unsteady state, obtaining a second feedback signal according to the target current;
a generating unit for generating a driving signal for controlling the battery test apparatus according to the first feedback signal or the second feedback signal.
Optionally, the feedback unit includes a first adder and a second adder;
when the target current is in a steady state, the first adder is used for subtracting the given current of the battery test equipment and the filtered deviation signal to obtain a first output signal of the first adder; wherein the offset signal is a difference between the filtered and error-corrected target current and the unfiltered and error-corrected target current;
the second adder is used for making a difference between the first output signal and the target current to obtain a first feedback signal;
the first adder is used for outputting a given current of the battery test equipment as a second output signal of the first adder when the target current is in an unsteady state;
the second adder is configured to obtain the second feedback signal by subtracting the second output signal from the target current.
Optionally, the feedback unit further includes a filtering unit;
the output end of the filtering unit is connected with the inverting input end of the first adder;
the filtering unit is used for:
outputting a filtered deviation signal when the target current is in a steady state;
when the target current is in an unsteady state, no signal is output.
Optionally, the filtering unit includes a first filter, a calibration module, a third adder, and a second filter, which are connected in sequence;
the first filter is used for filtering the target current;
the calibration module is used for carrying out error calibration on the filtered target current;
the third adder is used for obtaining the deviation signal according to the target current which is subjected to filtering and error calibration and the target current which is not subjected to filtering and error calibration;
the second filter is used for filtering the deviation signal to obtain a filtered deviation signal.
Optionally, the generating unit includes a proportional-integral control module and a complementary pulse width modulation waveform generating module;
the proportional-integral control module is used for performing integral operation on the first feedback signal or the second feedback signal to obtain an integral signal;
the complementary pulse width modulation waveform generation module is used for generating a driving signal for controlling the battery test equipment according to the integral signal.
A second aspect of the present application provides a control method of a battery test method, including:
when the target current of the battery test equipment is in a stable state, obtaining a first feedback signal according to the filtered and error-calibrated target current; wherein the target current is a current detected by a Hall current sensor of the battery test equipment;
when the target current is in an unsteady state, obtaining a second feedback signal according to the target current;
generating a driving signal for controlling the battery test apparatus according to the first feedback signal or the second feedback signal.
Optionally, when the target current of the battery test equipment is in a steady state, obtaining a first feedback signal according to the filtered and error-calibrated target current includes:
when the target current is in a steady state, the given current of the battery test equipment and the filtered deviation signal are subjected to difference to obtain a first output signal of the first adder; wherein the deviation signal is a difference between the filtered and error-corrected target current and the target current that is not filtered and error-corrected;
obtaining the first feedback signal by subtracting the first output signal from the target current;
when the target current is in an unstable state, obtaining a second feedback signal according to the target current includes:
outputting a given current of the battery test equipment as a second output signal of the first adder when the target current is in an unsteady state;
and obtaining the second feedback signal by making a difference between the second output signal and the target current.
Optionally, before the step of subtracting the given current of the battery test apparatus from the filtered deviation signal to obtain the first output signal of the first adder, the method further includes:
obtaining a filtered deviation signal output by a filtering unit through an inverting input end of the first adder; wherein the filtering unit does not output a signal when the target current is in an unstable state.
Optionally, the process of outputting the filtered deviation signal by the filtering unit includes:
filtering the target current;
carrying out error calibration on the filtered target current;
obtaining the deviation signal according to the target current which is subjected to filtering and error calibration and the target current which is not subjected to filtering and error calibration;
and filtering the deviation signal to obtain a filtered deviation signal.
Optionally, the generating a driving signal for controlling the battery test equipment according to the first feedback signal or the second feedback signal includes:
performing integral operation on the first feedback signal or the second feedback signal to obtain an integral signal;
for generating a drive signal for controlling the battery test equipment in dependence on the integrated signal.
The application provides a control device and a method of battery test equipment, and the device comprises a feedback unit, which is used for: when the target current of the battery test equipment is in a stable state, obtaining a first feedback signal according to the filtered and error-calibrated target current; the target current is the current detected by a Hall current sensor of the battery test equipment; when the target current is in an unsteady state, obtaining a second feedback signal according to the target current; and a generating unit for generating a driving signal for controlling the battery test apparatus according to the first feedback signal or the second feedback signal. According to the scheme, the test equipment is controlled according to the target current after filtering and error calibration in a steady state, and the test equipment is directly controlled according to the target current in an unsteady state, so that the requirement of quick response in the unsteady state and the requirement of improving the test precision in the steady state are compatible.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a battery testing system according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a battery testing apparatus according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a control device of a battery testing apparatus according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram illustrating an operating principle of a control device of a battery testing apparatus according to an embodiment of the present disclosure;
FIG. 5 is a schematic diagram illustrating an operation principle of a control device of another battery testing apparatus according to an embodiment of the present disclosure;
fig. 6 is a flowchart of a control method of a battery test apparatus according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to facilitate understanding of the technical solution of the present application, a brief description of the battery test apparatus is first provided.
Please refer to fig. 1, which is a schematic structural diagram of a battery testing system according to an embodiment of the present disclosure.
As shown in fig. 1, the battery testing system includes a battery testing device and a battery to be tested, the battery is connected between a VP interface and a VN interface of the battery testing device, and the battery testing device accesses an external ac power grid and converts three-phase ac power input by the ac power grid into dc power, so as to perform a charge and discharge test on the battery to be tested.
The structure of the battery test equipment can be seen in fig. 2, which is a schematic diagram of an internal structure of the battery test equipment provided in the embodiment of the present application.
The battery test equipment comprises a three-phase AC/DC converter directly connected with an external power grid and used for converting three-phase alternating current of the external power grid into direct current.
A filter capacitor C1 and two Insulated Gate Bipolar Transistors (IGBTs) Q1 and Q2 connected in parallel with C1 are connected between the output end of the three-phase AC/DC converter, i.e., the VP interface and the VN interface of the three-phase AC/DC converter.
Two IGBTs are connected in series, and each IGBT is connected in parallel with a diode.
The VP interface and the VN interface of the battery test equipment are led out from two ends of the Q2 and connected to a battery to be tested, the Q2 is connected with a filter capacitor C2 in parallel, and the common end of the Q1 and the Q2 is connected with an inductor L1.
A hall current sensor (hereinafter referred to as hall sensor) T1 is arranged on a branch connected to the common end of Q1 and Q2, and is used for detecting a current signal on the branch in real time.
The battery test apparatus further includes control means for generating a drive signal for Q1 (denoted as a first drive signal) and a drive signal for Q2 (denoted as a second drive signal).
When the SOC of the battery is tested using the battery test apparatus shown in fig. 2, the three-phase AC/DC converter is connected to an external power grid, and at the same time, the control device generates the first and second driving signals to control Q1 and Q2 to be connected or disconnected, thereby performing a charge and discharge test on the battery.
In order to improve the test accuracy, the control device performs feedback adjustment on the first driving signal and the second driving signal according to the detection current acquired by the T1, that is, the first driving signal and the second driving signal are generated according to the detection current of the T1.
As described in the background art, in order to solve the problems of the adjustment methods in the prior art, the present application provides a control device of a battery testing apparatus, please refer to fig. 3, which is a schematic structural diagram of the control device of the battery testing apparatus provided in this embodiment.
As shown in fig. 3, the control device includes a first adder, a second adder, a proportional-integral control module and a driving signal generation module, which are connected in series in sequence.
The battery testing equipment comprises a first adder, a second adder, a third adder and a fourth adder, wherein the battery testing equipment is provided with a battery, the first adder is used for adding a given current Iref to the battery testing equipment, the current is a preset constant, and the output end of the first adder is connected with the non-inverting input end of the second adder.
The output end of the second adder is connected to the input end of the proportional-integral control module, the proportional-integral module is used for carrying out integral operation on signals output by the second adder, the signals after the integral operation are input to the driving signal generation module, and the driving signal generation module generates a first driving signal and a second driving signal according to the signals after the operation.
The driving signal generating module may be specifically a complementary Pulse Width Modulation (PWM) generating module.
The control devices of the conventional battery testing equipment all include the proportional-integral control module and the driving signal generation module shown in fig. 3, so the specific working principles of the two modules can be referred to in the related art, and are not described in detail.
The control device of the embodiment further comprises a first filter, a calibration module, a third adder and a second filter which are sequentially connected in series.
The hall sensor detects current, that is, a current signal If detected by T1 in fig. 2 is input from the first filter, filtered by the first filter, and enters the calibration module for calibration. The signal calibrated by the calibration module enters the non-inverting input terminal of the third adder, and meanwhile, the detection current If which is not filtered and calibrated directly enters the inverting input terminal of the third adder, so that the third adder makes a difference between the calibration signal obtained by filtering and calibrating the detection current If and the original detection current If to obtain a deviation signal.
As described in the background section, the conventional battery testing device can also calibrate the detection current of the hall sensor, so that the specific working principle of the calibration module can be referred to other related technologies, and is not described in detail.
And the deviation signal enters a second filter, a second filtering signal is obtained after the deviation signal is filtered by the second filter, and the second filtering signal enters the first adder from the inverting input end of the first adder, so that the difference is made between the first adder and the given current.
On the other hand, the detection current If is also directly input to the inverting input terminal of the second adder, and the output signal of the first adder is subtracted in the second adder.
It should be noted that the first filter and the second filter are both low-pass filters, that is, filters that only allow signals below a preset cutoff frequency to pass through. And the cut-off frequency of the first filter and the cut-off frequency of the second filter are equal.
In this embodiment, the first filter is used to filter the triangular waveform superimposed by the switch of the battery test apparatus in the detection current, and the second filter is used to filter the triangular waveform introduced by the detection current at the inverting input terminal in the deviation signal.
The adder, the filter and each module in the control device provided in this embodiment may be implemented in a circuit structure having corresponding functions and formed by using various electronic components, or may be implemented in an Integrated Circuit (IC) chip for implementing the corresponding functions, which is not limited in this embodiment.
The operation principle of the control device of the battery test apparatus according to the present embodiment will be described with reference to the structure shown in fig. 3.
The operation of the device in the non-steady state, i.e., the fast response state of the battery test apparatus will be described first.
The fast response state refers to a state that the detection current of the battery test equipment fluctuates sharply, and is specifically represented by a high frequency of the fluctuation of the detection current.
In a quick response state, a detection current If detected by the hall sensor is mainly a high-frequency signal, and a low-frequency signal is weak. Therefore, after being filtered by the first filter, the high-frequency signal with higher intensity is intercepted by the first filter because the high-frequency signal is higher than the cut-off frequency, and only the first filtered signal with lower intensity and the frequency lower than the cut-off frequency is output to the calibration module.
When the signal strength input to the calibration module is weak, the calibration effect of the calibration module is not significant, so that the signal calibrated by the calibration module is similar to the first filtered signal before calibration, in other words, it can be considered that in the fast response state, the calibrated signal is approximately equal to the first filtered signal.
And then, after the calibrated signal enters a third adder, the calibrated signal is subtracted from the original detection current If input by the inverting input end to obtain a deviation signal.
As mentioned above, in the fast response state, the calibrated signal is approximately equal to the first filtered signal, and the first filtered signal is a low-frequency signal of the detection current If with a frequency lower than the cut-off frequency of the filter.
Therefore, in the fast response state, the third adder makes the calibrated signal and the detection current different, which is equivalent to making the low-frequency signal in the detection current and the detection current different, that is, the low-frequency signal included in the detection current is subtracted from the unprocessed detection current, so that the finally obtained deviation signal can be considered to be similar to the high-frequency signal with the frequency higher than the cut-off frequency in the detection current.
After the deviation signal enters the second filter, since the deviation signal is approximately equal to the high frequency signal in the detection current, the deviation signal is almost completely intercepted when passing through the second filter in the fast response state, that is, the second filtered signal output by the second filter in this state is approximately equal to 0.
As shown in fig. 4, it is equivalent to that in the fast response state, the branch of the first filter, the calibration module, the third adder and the second filter connected in series hardly functions, and at this time, the input signal of the proportional integral control module is equivalent to a signal obtained by directly subtracting the given current from the detected current of the hall sensor in the second adder.
In summary, when the battery test apparatus is in the fast response state, the control device provided in this embodiment performs feedback adjustment according to the unfiltered detection current, so as to avoid the phase delay caused by using the filtered signal. The dynamic response of the battery test equipment is accelerated.
The operation principle of the control device provided in this embodiment is shown in fig. 5 after the battery test apparatus enters the steady state.
The steady state refers to a state that the detection current of the hall sensor T1 on the battery test equipment is kept relatively stable (i.e. the fluctuation amplitude and frequency are low).
At this time, the detection current is mainly a low-frequency signal having a frequency lower than the cutoff frequency, and a triangular waveform generated when the battery test apparatus is switched on and off is superimposed.
When the detection current enters the first filter, the first filter filters the superposed triangular waveform with the frequency higher than the cut-off frequency from the detection current to obtain a first filtering signal without the triangular waveform, and the first filtering signal is output to the calibration module.
As described above, the detection current is mainly a low-frequency signal in a steady state, so that the strength of the first filtering signal is high, and the calibration module can effectively calibrate the first filtering signal to obtain a calibrated signal with the error of the hall sensor eliminated.
Then, the calibrated signal enters a third adder, and the difference is made with the detection current input by the inverting input end.
At this time, compared with the unprocessed detection current, the calibrated signal is equivalent to a signal obtained by eliminating the error of the triangular waveform and the hall sensor by the detection current, namely:
calibrated signal = detected current-triangle waveform-error.
Correspondingly, the deviation signal obtained by subtracting the calibrated signal from the detection current is equivalent to the sum of the triangular waveform in the detection current and the error of the hall sensor, that is:
offset signal = calibrated signal — detection current = - (triangular waveform + error).
The offset signal then enters a second filter for filtering. The second filter filters out the triangular waveform in the above expression, so that the finally output second filtered signal is equivalent to the inverse of the error of the hall sensor in the detected current, that is: second filtered signal = -error.
After the second filtering signal enters the first adder from the inverting input end, the second filtering signal is differentiated from the given current of the non-inverting input end to obtain an output signal of the first adder, namely: given the current-the second filtered signal.
And then the output signal of the first adder is subjected to difference with the detection current of the inverting input end in the second adder to obtain the output signal of the second adder, and the output signal is also the input signal of the proportional-integral control module, namely: input signal = given current-detected current-second filtered signal.
Since the second filtered signal is equivalent to the inversion of the error of the hall sensor in the detected current, the input signal is equivalent to: input signal = given current- (detected current-error).
Therefore, the control device provided by the embodiment successfully eliminates the error introduced by the hall sensor in the detection current, and performs feedback adjustment on the first driving signal and the second driving signal according to the detection current after the error is eliminated, thereby effectively improving the testing precision of the battery testing equipment in a steady state.
Further, in a steady state, before the control device provided by the embodiment eliminates the error from the detected current by using the calibration module for the first time, the triangular waveform in the detected current is filtered by using the low-pass filter, so that the error eliminated by the subsequent calibration module is not interfered by the parameter of the battery to be tested, the effect that the calibration accuracy is irrelevant to the battery to be tested is achieved, and the control device of the embodiment has better universality.
In summary, when the battery test equipment is in a steady state, the filtered detection current is calibrated, and feedback adjustment is performed according to the filtered and calibrated signal, so that the test accuracy of the battery test equipment in the steady state is improved.
By combining the working principle of the control device of the embodiment in the above fast response state and steady state, it can be seen that the control device provided by the embodiment can avoid using the filtered detection current to perform feedback condition when the battery test equipment is in the unsteady state, thereby improving the dynamic response performance of the battery test equipment, and when the battery test equipment is in the steady state, use the filtered and calibrated detection current to perform feedback condition, thereby improving the test precision of the battery test equipment in the steady state, and simultaneously meeting the requirements of accelerating dynamic response and improving test precision, so that the battery test equipment can meet the test requirements of complex test conditions and can meet higher test precision requirements.
In the control apparatus of the battery testing device provided in this embodiment, a control loop formed by the first adder, the second adder, the first filter, the calibration module, the third adder, and the second filter is equivalent to a feedback unit having the following functions:
when the target current of the battery test equipment is in a stable state, obtaining a first feedback signal according to the filtered and error-calibrated target current; the target current is detected by a Hall current sensor of the battery testing equipment;
and when the target current is in an unsteady state, obtaining a second feedback signal according to the target current.
The first feedback signal corresponds to the output signal of the second adder in the steady state shown in fig. 5, and the second feedback signal corresponds to the output signal of the second adder in the fast response state shown in fig. 4, which is the detection current detected by the hall sensor T1 shown in fig. 2.
The proportional-integral control module and the driving signal generation module may be collectively regarded as a generation unit for generating a driving signal for controlling the battery test apparatus according to the first feedback signal or the second feedback signal. Wherein the driving signal may include the first driving signal and the second driving signal shown in fig. 3.
As previously mentioned, the feedback unit may comprise a first adder and a second adder;
when the target current is in a steady state, the first adder is used for subtracting the given current of the battery test equipment and the filtered deviation signal to obtain a first output signal of the first adder; the deviation signal is the difference between the filtered and error-calibrated target current and the target current which is not filtered and error-calibrated;
the second adder is used for making a difference between the first output signal and the target current to obtain a first feedback signal;
when the target current is in an unstable state, the first adder is used for outputting the given current of the battery test equipment as an output signal of the first adder;
the second adder is used for making a difference between the second output signal and the target current to obtain a second feedback signal.
The first output signal corresponds to an output signal of the first adder in a steady state, and the second output signal corresponds to an output signal of the first adder in a fast response state.
The deviation signal corresponds to the output signal of the third adder in the apparatus shown in fig. 3.
Further optionally, the first filter, the second filter, the calibration module and the third adder in the feedback unit may be regarded as a filtering unit, and an output end of the filtering unit is connected to an inverting input end of the first adder.
The filtering unit is used for:
outputting a filtered deviation signal when the target current is in a steady state;
when the target current is in an unsteady state, no signal is output.
The filtered deviation signal corresponds to the second filtered signal output by the second filter in fig. 5 when the detection current is in steady state.
In particular, the first filter is used to filter the target current as described above;
the calibration module is used for carrying out error calibration on the filtered target current;
the third adder is used for obtaining an offset signal according to the filtered and error-calibrated target current and the target current which is not filtered and error-calibrated;
the second filter is used for filtering the deviation signal to obtain a filtered deviation signal.
Further optionally, the generating unit includes a proportional-integral control module and a complementary pulse width modulation waveform generating module;
the proportional-integral control module is used for carrying out integral operation on the first feedback signal or the second feedback signal to obtain an integral signal;
and the complementary pulse width modulation waveform generation module is used for generating a driving signal for controlling the battery test equipment according to the integral signal.
The integrated signal can be regarded as the signal output by the proportional-integral control module in the device shown in fig. 3.
According to the control device of the battery test equipment provided in the embodiment of the present application, a control method of the battery test equipment is also provided in the embodiment of the present application, please refer to fig. 6, which is a flowchart of the method. The method may include the following steps.
S601, when the target current of the battery test equipment is in a stable state, a first feedback signal is obtained according to the filtered and error-calibrated target current.
Wherein the target current is a current detected by a Hall current sensor of the battery test equipment.
And S602, when the target current is in an unsteady state, obtaining a second feedback signal according to the target current.
And S603, generating a driving signal for controlling the battery test equipment according to the first feedback signal or the second feedback signal.
For specific implementation of each step in the method, reference may be made to a working principle of a relevant module in a control device of a battery testing device provided in any embodiment of the present application, and details are not described here.
Finally, it should also be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
It should be noted that the terms "first", "second", and the like in the present invention are only used for distinguishing different devices, modules or units, and are not used for limiting the order or interdependence relationship of the functions performed by the devices, modules or units.
A person skilled in the art can make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A control apparatus of a battery test device, comprising:
a feedback unit to:
when the target current of the battery test equipment is in a stable state, obtaining a first feedback signal according to the filtered and error-calibrated target current; wherein the target current is a current detected by a Hall current sensor of the battery test equipment;
when the target current is in an unsteady state, obtaining a second feedback signal according to the target current;
a generating unit for generating a driving signal for controlling the battery test apparatus according to the first feedback signal or the second feedback signal.
2. The apparatus of claim 1, wherein the feedback unit comprises a first adder and a second adder;
when the target current is in a steady state, the first adder is used for making a difference between the given current of the battery test equipment and the filtered deviation signal to obtain a first output signal of the first adder; wherein the offset signal is a difference between the filtered and error-corrected target current and the unfiltered and error-corrected target current;
the second adder is used for making a difference between the first output signal and the target current to obtain a first feedback signal;
the first adder is used for outputting a given current of the battery test equipment as a second output signal of the first adder when the target current is in an unsteady state;
the second adder is used for making a difference between the second output signal and the target current to obtain a second feedback signal.
3. The apparatus of claim 2, wherein the feedback unit further comprises a filtering unit;
the output end of the filtering unit is connected with the inverting input end of the first adder;
the filtering unit is used for:
outputting a filtered deviation signal when the target current is in a steady state;
when the target current is in an unsteady state, no signal is output.
4. The apparatus of claim 3, wherein the filtering unit comprises a first filter, a calibration module, a third adder and a second filter connected in sequence;
the first filter is used for filtering the target current;
the calibration module is used for carrying out error calibration on the filtered target current;
the third adder is used for obtaining the deviation signal according to the target current which is subjected to filtering and error calibration and the target current which is not subjected to filtering and error calibration;
the second filter is used for filtering the deviation signal to obtain a filtered deviation signal.
5. The apparatus of claim 1, wherein the generating unit comprises a proportional-integral control module and a complementary pulse-width-modulation waveform generating module;
the proportional-integral control module is used for performing integral operation on the first feedback signal or the second feedback signal to obtain an integral signal;
the complementary pulse width modulation waveform generation module is used for generating a driving signal for controlling the battery test equipment according to the integral signal.
6. A control method of a battery test apparatus, comprising:
when the target current of the battery test equipment is in a stable state, obtaining a first feedback signal according to the filtered and error-calibrated target current; wherein the target current is a current detected by a Hall current sensor of the battery test equipment;
when the target current is in an unsteady state, obtaining a second feedback signal according to the target current;
generating a driving signal for controlling the battery test apparatus according to the first feedback signal or the second feedback signal.
7. The method of claim 6, wherein obtaining a first feedback signal from the filtered and error-calibrated target current when the target current of the battery test equipment is in a steady state comprises:
when the target current is in a steady state, the given current of the battery test equipment and the filtered deviation signal are subjected to difference to obtain a first output signal of the first adder; wherein the deviation signal is a difference between the filtered and error-corrected target current and the target current that is not filtered and error-corrected;
the first output signal and the target current are subjected to difference to obtain a first feedback signal;
when the target current is in an unstable state, obtaining a second feedback signal according to the target current includes:
outputting a given current of the battery test equipment as a second output signal of the first adder when the target current is in an unsteady state;
and obtaining the second feedback signal by making a difference between the second output signal and the target current.
8. The method of claim 7, wherein prior to subtracting the filtered offset signal from the given current of the battery test equipment to obtain the first output signal of the first summer, further comprising:
obtaining a filtered deviation signal output by a filtering unit through an inverting input end of the first adder; wherein the filtering unit does not output a signal when the target current is in an unstable state.
9. The method of claim 8, wherein outputting the filtered deviation signal by the filtering unit comprises:
filtering the target current;
carrying out error calibration on the filtered target current;
obtaining the deviation signal according to the target current which is filtered and error-corrected and the target current which is not filtered and error-corrected;
and filtering the deviation signal to obtain a filtered deviation signal.
10. The method of claim 6, wherein generating a drive signal for controlling the battery test equipment based on the first feedback signal or the second feedback signal comprises:
performing integral operation on the first feedback signal or the second feedback signal to obtain an integral signal;
for generating a drive signal for controlling the battery test apparatus in dependence on the integrated signal.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5254952A (en) * | 1989-09-11 | 1993-10-19 | Snap-On Tools Corporation | Automatic battery and charging system tester with motor-driven carbon pile loading |
| JP2003219565A (en) * | 2002-01-18 | 2003-07-31 | Nec Machinery Corp | Method and apparatus for calibrating battery charging/ discharging system |
| CN102866300A (en) * | 2012-09-11 | 2013-01-09 | 南京鼎尔特科技有限公司 | Low-frequency micro-current constant-current exciting circuit and storage battery internal resistance measuring circuit |
| CN206804841U (en) * | 2017-06-15 | 2017-12-26 | 江苏师范大学 | A kind of device for lithium battery energy storage battery equipment charge-discharge test |
| CN114530874A (en) * | 2022-02-24 | 2022-05-24 | 广东恒翼能科技有限公司 | Direct-current bus control method and system for power battery test system |
-
2022
- 2022-10-26 CN CN202211316756.8A patent/CN115372847B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5254952A (en) * | 1989-09-11 | 1993-10-19 | Snap-On Tools Corporation | Automatic battery and charging system tester with motor-driven carbon pile loading |
| JP2003219565A (en) * | 2002-01-18 | 2003-07-31 | Nec Machinery Corp | Method and apparatus for calibrating battery charging/ discharging system |
| CN102866300A (en) * | 2012-09-11 | 2013-01-09 | 南京鼎尔特科技有限公司 | Low-frequency micro-current constant-current exciting circuit and storage battery internal resistance measuring circuit |
| CN206804841U (en) * | 2017-06-15 | 2017-12-26 | 江苏师范大学 | A kind of device for lithium battery energy storage battery equipment charge-discharge test |
| CN114530874A (en) * | 2022-02-24 | 2022-05-24 | 广东恒翼能科技有限公司 | Direct-current bus control method and system for power battery test system |
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