CN116660729A - Battery simulation device - Google Patents
Battery simulation device Download PDFInfo
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- CN116660729A CN116660729A CN202310644928.2A CN202310644928A CN116660729A CN 116660729 A CN116660729 A CN 116660729A CN 202310644928 A CN202310644928 A CN 202310644928A CN 116660729 A CN116660729 A CN 116660729A
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- 238000004088 simulation Methods 0.000 title claims abstract description 26
- 238000002955 isolation Methods 0.000 claims abstract description 12
- 230000009467 reduction Effects 0.000 claims description 7
- 230000003247 decreasing effect Effects 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
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- 238000012986 modification Methods 0.000 description 2
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Classifications
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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
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
- G01R31/2806—Apparatus therefor, e.g. test stations, drivers, analysers, conveyors
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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
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
- G01R31/281—Specific types of tests or tests for a specific type of fault, e.g. thermal mapping, shorts testing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a battery simulation device, comprising: the system comprises an AC/DC power module, a plurality of battery core modules and a control module; the direct current output end of the AC/DC power supply module outputs direct current with voltage value V1; the cell module comprises a pulse width modulation controller, a BUCK step-down unit and a linear optocoupler isolation module. The control module is used for carrying out the following treatment on each experimental scheme: acquiring a voltage value V2 required to be output by each cell module in an experimental scheme, and sending the voltage value V2 to a pulse width modulation controller in the corresponding cell module, wherein V2 is smaller than V1; the pulse width modulation controller is used for: when a voltage value V2 is received, generating a PWM square wave signal with a duty ratio of V2/V1, and outputting the PWM square wave signal to the BUCK step-down unit; the simulation device greatly improves the efficiency of the output voltage value of the simulation cell output voltage value regulating circuit.
Description
Technical Field
The invention relates to the technical field of battery simulation, in particular to a battery simulation device.
Background
With the development of new energy technology, energy storage technology has been rapidly developed and applied on a large scale, and in an energy storage device, a plurality of batteries are generally provided, and in order to manage the batteries, a BMS (Battery Management System ) board is generally provided in the energy storage device, and the BMS board can obtain an operation state of each battery, and then adjust an operation parameter of each battery based on the operation state. For example, if a battery fails, the battery may be bypassed; the electric quantity of one battery is insufficient, and the electric quantity of other batteries can be transferred to the battery, so that electric quantity balance is realized.
In the process of manufacturing and designing the BMS board, it is necessary to test the BMS board. It can be known that if a battery simulation device can be designed, the battery simulation device can simulate all the operating states of the plurality of batteries, and if the BMS can normally process all the operating states and the adjustment command given to the operating parameters of each battery meets the preset expectations, the BMS board is qualified.
In view of the above, designing an analog device capable of simulating all the operating states of the plurality of batteries is a problem to be solved.
Disclosure of Invention
An object of the present invention is to provide a battery simulation apparatus, which includes: the system comprises an AC/DC power module, a plurality of battery core modules and a control module;
the direct current output end of the AC/DC power supply module outputs direct current with a voltage value of V1;
the battery cell module comprises a pulse width modulation controller and a BUCK voltage reduction unit, the pulse width modulation controller is electrically connected with the control module, the direct current input end of the BUCK voltage reduction unit is electrically connected with the direct current output end of the AC/DC power supply module, and the BUCK voltage reduction unit is provided with a direct current output end;
the control module is used for: acquiring a voltage value V2 required to be output by each cell module, and sending the voltage value V2 to a pulse width modulation controller in the corresponding cell module, wherein V2 is 0< V1;
the pulse width modulation controller is used for: when a voltage value V2 is received, generating a PWM square wave signal with a duty ratio of V2/V1, and outputting the PWM square wave signal to the BUCK step-down unit;
and the output voltage value of the direct current output end of the BUCK unit=v1 is the duty ratio of the PWM square wave signal.
The technical scheme comprises any one of the above steps, and further comprises: the pulse width modulation controller is electrically connected with the direct current output end of the BUCK step-down unit;
the pulse width modulation controller is further configured to: acquiring an output voltage value V3 of a direct current output end of the BUCK step-down unit, and increasing the duty ratio of an output PWM square wave signal when V3 is smaller than V2; when V3> V2, the duty cycle of the outputted PWM square wave signal is reduced.
The technical scheme comprises any one of the above steps, and further comprises: the "increasing the duty ratio of the output PWM square wave signal" specifically includes: the duty cycle of the output PWM square wave signal is increased by a value proportional to |v3-v2|.
The technical scheme comprises any one of the above steps, and further comprises: the "reducing the duty ratio of the output PWM square wave signal" specifically includes: the duty cycle of the output PWM square wave signal is reduced by a value proportional to |v3-v2|.
Including above-mentioned arbitrary technical scheme, the electric core module still includes:
and a linear optocoupler isolation unit is electrically connected between the pulse width modulation controller and the control module.
The technical scheme comprises any one of the above steps, and further comprises: and a latch is also electrically connected between the battery core module and the control module. The latch is used for: receiving and storing the received voltage value V2; the pulse width modulation controller is further configured to: the voltage value is read from the latch.
The technical scheme comprises any one of the above steps, and further comprises: the step of acquiring the voltage value V2 required to be output by each cell module and sending the voltage value V2 to the pulse width modulation controller in the corresponding cell module specifically includes:
acquiring a voltage value V2 and duration time T which are required to be output by each cell module, and sending the voltage value V2 to a latch in the corresponding cell module and keeping the time T; the pulse width modulation controller is further configured to: the voltage value is read from the latch every other preset time, 0< preset time < T.
The technical scheme comprises any one of the above steps, and further comprises: the control module is further configured to: when a stop instruction of a target cell module is acquired, the stop instruction is sent to a latch corresponding to the target cell module, and the target cell module is any cell module;
the pulse width modulation controller is further configured to: and when the stop instruction is read from the latch, controlling the voltage value of the direct current output end of the BUCK step-down unit to be zero.
The technical scheme comprises any one of the above steps, and further comprises: the control module is used for carrying out the following treatment on each received experimental scheme: acquiring a voltage value V2 required to be output by each cell module in the experimental scheme, and sending the voltage value V2 to a pulse width modulation controller in the corresponding cell module; the experimental scheme comprises a voltage value corresponding to each cell module (1).
The technical scheme comprises any one of the above steps, and further comprises: the direct current output end of each BUCK step-down unit is provided with an anode output line and a cathode output line;
all the cell modules are arranged in a queue, and in any two adjacent cell modules, the positive electrode output line in the front cell module is electrically connected with the negative electrode output line in the rear cell module in the direction from the head of the queue to the tail of the queue.
The invention provides the following advantages: the simulation device greatly improves the efficiency of the output voltage value of the simulation cell output voltage value regulating circuit.
Drawings
FIG. 1 is a schematic diagram of a battery simulation apparatus according to the present invention;
figure 2 is a schematic diagram of a cell module connection according to the present invention.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the invention and structural, methodological, or functional modifications of these embodiments that may be made by one of ordinary skill in the art are included within the scope of the invention.
If the invention is expressed as relating to an orientation (e.g., up, down, left, right, front, back, outer, inner, etc.), then the definition of the orientation referred to is required.
The scope of the embodiments herein includes the full scope of the claims, as well as all available equivalents of the claims. The terms "first," "second," and the like herein are used merely to distinguish one element from another element and do not require or imply any actual relationship or order between the elements. Indeed the first element could also be termed a second element and vice versa. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a structure, apparatus, or device that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such structure, apparatus, or device. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a structure, apparatus or device comprising the element.
An embodiment of the present invention provides a battery simulation device, as shown in fig. 1 and fig. 2, which are schematic connection diagrams of the battery simulation device, including: an AC/DC (Alternating Current/Direct Current) power module, a plurality of cell modules 1 and a control module;
the Direct Current output end of the AC/DC (Alternating Current/Direct Current) power supply module outputs Direct Current with a voltage value of V1;
the battery cell module 1 comprises a pulse width modulation controller and a BUCK voltage reducing unit, wherein the pulse width modulation controller is electrically connected with the control module, the Direct Current input end of the BUCK voltage reducing unit is electrically connected with the Direct Current output end of the AC/DC (Alternating Current/Direct Current) power supply module, and the BUCK voltage reducing unit is provided with a Direct Current output end;
the working principle of the whole battery simulation device is to simulate the output voltage value of the battery and realize voltage value adjustment through a control module. The voltage value, also called potential difference or potential difference, is a physical quantity that measures the difference in energy per unit charge in an electrostatic field due to the difference in potential. The magnitude of the voltage value from a certain point to another point is equal to the work done by the unit positive charge moving from the certain point to the other point under the action of the electric field force, and the direction of the voltage value is defined as the direction from high potential to low potential. The international units of voltage values are made in volts (V, V for short).
When the control module obtains the voltage value V2 output by the cell module, the voltage value V2 is sent to the corresponding pulse width modulation controller. The pulse width modulation controller generates PWM square wave signals with the duty ratio of V2/V1 according to V2 and outputs the PWM square wave signals to the BUCK step-down unit. The output voltage value of the BUCK unit is equal to the duty ratio of the PWM square wave signal. The battery simulation device also comprises a linear optocoupler isolation unit and a latch, and the linear optocoupler isolation unit is used for transmitting and storing the voltage value. The control module can process the output voltage value of the battery cell module according to an experimental scheme.
In practice, an AC/DC (Alternating Current/Direct Current) power module is a device that can form a constant Current in a circuit, such as a dry battery, a storage battery, a Direct Current generator, etc., and is called a Direct Current power supply; the control module may be an MCU (Microcontroller Unit, micro control unit). The pulse width modulation controller is used for controlling the on and off of the semiconductor switching device, so that a series of pulses with equal amplitude and unequal width, namely PWM waves, are obtained at the output end, and the PWM waves are used for replacing sinusoidal alternating current voltage values. The width of each pulse is modulated according to a certain rule, so that the magnitude of the output voltage value of the inverter circuit can be changed, and the output frequency can be changed.
The BUCK unit is a DC/DC (Direct Current/Direct Current) circuit for reducing a high voltage value to a low voltage value. The essence of the circuit is that the purpose of voltage reduction is achieved through a continuous switch, so that the circuit is also called a switching power supply circuit, and an input voltage value is periodically converted into a current pulse through an inductor and a switching tube and is filtered into an output voltage value through an output capacitor. The magnitude of the output voltage value can be adjusted by adjusting the duty cycle of the switching device. Its input is 12v dc and then to its constant switch the waveform becomes a rectangular square wave. If it is half of the time closed and half of the time open, it can finally output a voltage value of 6 v. Since the switch is closed only half the time, the last output voltage value is also half 12 v. If a voltage value of 5V is to be obtained, 42% of time is needed for closing and 58% of time is needed for opening, and the Buck voltage reducing unit has the advantages of high efficiency, small volume, portability, low cost and the like.
The control module is used for: acquiring a voltage value V2 required to be output by each cell module 1, and sending the voltage value V2 to a pulse width modulation controller in the corresponding cell module 1, wherein 0< V2< V1;
the pulse width modulation controller is used for: when a voltage value V2 is received, generating a PWM square wave signal with a duty ratio of V2/V1, and outputting the PWM square wave signal to the BUCK step-down unit;
and the output voltage value of the direct current output end of the BUCK unit=v1 is the duty ratio of the PWM square wave signal.
When in actual use, the voltage value of each cell module 1 can be adjusted, so that the working state of each cell module can be adjusted, and all working states of the plurality of cell modules can be simulated.
In this embodiment, the method further includes: the pulse width modulation controller is electrically connected with the direct current output end of the BUCK step-down unit;
the pulse width modulation controller is further configured to: acquiring an output voltage value V3 of a direct current output end of the BUCK step-down unit, and increasing the duty ratio of an output PWM square wave signal when V3 is smaller than V2; when V3> V2, the duty cycle of the outputted PWM square wave signal is reduced.
In this embodiment, the "increasing the duty ratio of the output PWM square wave signal" specifically includes: the duty cycle of the output PWM square wave signal is increased by a value proportional to |v3-v2|.
In this embodiment, the "reducing the duty ratio of the output PWM square wave signal" specifically includes: the duty cycle of the output PWM square wave signal is reduced by a value proportional to |v3-v2|.
In this embodiment, the battery cell module 1 further includes: and a linear optocoupler isolation unit is electrically connected between the pulse width modulation controller and the control module.
Here, a linear optocoupler isolation unit is a device for electrical isolation, which is achieved by a combination of optical and electronic techniques. A linear optocoupler isolation unit is typically composed of an optocoupler and associated circuitry. The optocoupler is composed of a light emitting diode and a photodiode. The input signal is converted to an optical signal which is received and converted back to an electrical signal by a photodiode, thereby achieving electrical isolation of the input from the output.
The working principle of the linear optical coupler isolation unit is as follows: when an input signal is applied to the light emitting diode, the light emitting diode emits a corresponding light signal. The optical signal is transmitted through an isolated space (typically an optical fiber or air) to a photodiode. After the light signal is received by the photosensitive diode, the light signal is converted into an electric signal corresponding to the input signal and is output through the output circuit, and the linear optical coupler isolation unit can transmit an analog signal or a digital signal between the input and the output and keep high transmission fidelity.
In this embodiment, the method further includes: and a latch is also electrically connected between the battery cell module 1 and the control module. The latch is used for: receiving and storing the received voltage value V2; the pulse width modulation controller is further configured to: the voltage value is read from the latch.
Here, the latch is used to store and hold the state of the input signal. It can "lock" the value of the input signal at its output, and even if the input signal changes or disappears, the output remains in its original state until another signal reaches and changes its state.
The latch operates on a principle similar to a memory element that can sample and hold an input signal under control of a clock signal. The latch typically has one or more data inputs (D) and a clock input (CLK). When the clock signal arrives, the latch stores the current input value in the internal memory and outputs it to the output terminal (Q). The output may be a single Q output or may have a complementary output (e.g., Q'). The type of latch may be: d flip-flops, JK flip-flops, RS flip-flops, T flip-flops, and the like.
In this embodiment, the "obtaining the voltage value V2 required to be output by each cell module 1 and sending the voltage value V2 to the pulse width modulation controller in the corresponding cell module 1" specifically includes:
acquiring a voltage value V2 and duration time T which are required to be output by each cell module 1, and sending the voltage value V2 to a latch in the corresponding cell module 1 and keeping the time T; the pulse width modulation controller is further configured to: the voltage value is read from the latch every other preset time, 0< preset time < T.
Here, the preset time is smaller than the duration T of the voltage value V2 required to be output by each cell module 1, so as to facilitate management of the cell modules.
In this embodiment, the control module is further configured to: when a stop instruction of the target cell module 1 is acquired, the stop instruction is sent to a latch corresponding to the target cell module 1, and the target cell module 1 is any cell module 1;
the pulse width modulation controller is further configured to: and when the stop instruction is read from the latch, controlling the voltage value of the direct current output end of the BUCK step-down unit to be zero.
In practice, the disconnection of the positive electrode and the negative electrode of the direct current output end of the BUCK step-down unit is the disconnection of a switching tube of the BUCK step-down unit.
In this embodiment, the control module is configured to perform the following processing on each received experimental scheme: acquiring a voltage value V2 required to be output by each cell module 1 in the experimental scheme, and sending the voltage value V2 to a pulse width modulation controller in the corresponding cell module 1; the experimental scheme comprises a voltage value corresponding to each cell module 1.
In this embodiment, the method further includes: the direct current output end of each BUCK step-down unit is provided with an anode output line and a cathode output line; all the cell modules 1 are arranged in a queue, and in any two adjacent cell modules 1 from the head to the tail, the positive electrode output line in the front cell module 1 is electrically connected with the negative electrode output line in the rear cell module 1.
Here, the positive output line in the front cell module 1 is electrically connected with the negative output line in the rear cell module 1 in only one connection mode, namely in series; in practice, the positive output line in the front cell module 1 may be electrically connected to the positive output line in the rear cell module 1, and the negative output line in the front cell module 1 may be electrically connected to the negative output line in the rear cell module 1, that is, in parallel.
The embodiments of the present invention have been described above, the description is illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvement in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (10)
1. A battery simulation apparatus, comprising:
an AC/DC power module, a plurality of cell modules (1) and a control module;
the direct current output end of the AC/DC power supply module outputs direct current with a voltage value of V1;
the battery cell module (1) comprises a pulse width modulation controller and a BUCK voltage reduction unit, wherein the pulse width modulation controller is electrically connected with the control module, the direct current input end of the BUCK voltage reduction unit is electrically connected with the direct current output end of the AC/DC power supply module, and the BUCK voltage reduction unit is provided with a direct current output end;
the control module is used for: acquiring a voltage value V2 required to be output by each cell module (1), and sending the voltage value V2 to a pulse width modulation controller in the corresponding cell module (1), wherein 0< V2< V1;
the pulse width modulation controller is used for: when a voltage value V2 is received, generating a PWM square wave signal with a duty ratio of V2/V1, and outputting the PWM square wave signal to the BUCK step-down unit;
and the output voltage value of the direct current output end of the BUCK unit=v1 is the duty ratio of the PWM square wave signal.
2. The battery simulation apparatus according to claim 1, wherein:
the pulse width modulation controller is electrically connected with the direct current output end of the BUCK step-down unit;
the pulse width modulation controller is further configured to: acquiring an output voltage value V3 of a direct current output end of the BUCK step-down unit, and increasing the duty ratio of an output PWM square wave signal when V3 is smaller than V2; when V3> V2, the duty cycle of the outputted PWM square wave signal is reduced.
3. The battery simulation apparatus according to claim 1, wherein the increasing the duty ratio of the outputted PWM square wave signal specifically includes: the duty cycle of the output PWM square wave signal is increased by a value proportional to |v3-v2|.
4. The battery simulation apparatus according to claim 1, wherein the "decreasing the duty ratio of the outputted PWM square wave signal" specifically includes: the duty cycle of the output PWM square wave signal is reduced by a value proportional to |v3-v2|.
5. The battery simulation apparatus according to claim 1, wherein:
and a linear optocoupler isolation unit is electrically connected between the pulse width modulation controller and the control module.
6. The battery simulation device according to claim 1, characterized in that a latch is also electrically connected between the cell module (1) and the control module; the latch is used for: receiving and storing the received voltage value V2; the pulse width modulation controller is further configured to: the voltage value is read from the latch.
7. The battery simulation apparatus according to claim 6, wherein the "obtaining the voltage value V2 of the output required for each cell module (1), and transmitting the voltage value V2 to the pulse width modulation controller in the corresponding cell module (1)" specifically includes:
acquiring a voltage value V2 and duration time T which are required to be output by each cell module (1), and sending the voltage value V2 to a latch in the corresponding cell module (1) and keeping the time T; the pulse width modulation controller is further configured to: the voltage value is read from the latch every other preset time, 0< preset time < T.
8. The battery simulation apparatus of claim 6, wherein the control module is further configured to: when a stop instruction of the target cell module (1) is acquired, the stop instruction is sent to a latch corresponding to the target cell module (1); the target cell module (1) is any cell module (1);
the pulse width modulation controller is further configured to: and when the stop instruction is read from the latch, controlling the voltage value of the direct current output end of the BUCK step-down unit to be zero.
9. The battery simulation apparatus of claim 6, wherein the control module is configured to perform the following for each experimental protocol received: acquiring a voltage value V2 required to be output by each cell module (1) in the experimental scheme, and sending the voltage value V2 to a pulse width modulation controller in the corresponding cell module (1); the experimental scheme comprises a voltage value corresponding to each cell module (1).
10. The analog device according to claim 6, wherein the dc output terminal of each BUCK unit is provided with a positive output line and a negative output line;
all the cell modules (1) are arranged in a queue, and the positive electrode output line in the front cell module (1) is electrically connected with the negative electrode output line in the rear cell module (1) in any two adjacent cell modules (1) from the queue head to the queue tail.
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| CN202310644928.2A CN116660729A (en) | 2023-05-31 | 2023-05-31 | Battery simulation device |
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