CN112928809B - Power supply device, control method and system - Google Patents
Power supply device, control method and system Download PDFInfo
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- CN112928809B CN112928809B CN202110441287.1A CN202110441287A CN112928809B CN 112928809 B CN112928809 B CN 112928809B CN 202110441287 A CN202110441287 A CN 202110441287A CN 112928809 B CN112928809 B CN 112928809B
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000004146 energy storage Methods 0.000 claims abstract description 70
- 238000007599 discharging Methods 0.000 claims abstract description 38
- 238000012360 testing method Methods 0.000 claims description 14
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 17
- 230000008569 process Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/34—Snubber circuits
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The application provides a power supply device, a control method and a system, wherein the power supply device comprises a switching power supply and a unidirectional conduction device, wherein the positive electrode of the unidirectional conduction device is connected with the positive output end of the switching power supply; and the positive output end of the power supply device is connected with the positive electrode of the energy storage battery, and the negative output end of the power supply device is connected with the negative electrode of the energy storage battery through the first switch circuit. The power supply device can provide electric energy required by normal operation for a connected target object, and can also provide charging electric energy for the target object when the target object is in a charging mode; when the target object is in a discharging mode, the energy storage battery absorbs the discharging electric energy of the target object, so that the loss of the switching power supply is reduced. In addition, when the target object is in a discharge mode, the unidirectional conduction device is in a reverse cut-off state, so that the influence of reverse voltage on the switching power supply is avoided, the reverse voltage stress of the switching power supply is reduced, the stress requirement of the switching power supply is reduced, and finally the cost of the power supply device is reduced.
Description
Technical Field
The invention belongs to the technical field of power supplies, and particularly relates to a power supply device, a control method and a system.
Background
In many scenarios, a power supply device is required to both supply output power to a connected object and absorb power released by the connected object, for example, a battery device with a BMS, and when the battery device needs to be charged, the power supply device supplies power required for charging the battery device and power required for normal operation of the BMS in the battery device; when the battery device needs to be discharged, the power supply device is required to absorb the electric energy released from the battery device. However, the current power supply device cannot meet the above requirements.
Disclosure of Invention
In view of the above, the present invention aims to provide a power supply device, a control method and a system, so as to solve the technical problem that the conventional power supply device cannot simultaneously provide electric energy required by work for an object and meet the charging and discharging requirements of the object, and the disclosed technical scheme is as follows:
In a first aspect, the present application provides a power supply apparatus comprising: the device comprises a switching power supply, a unidirectional conduction device, an energy storage battery and a first switching circuit;
The positive output end of the switching power supply is connected with the positive electrode of the unidirectional conduction device, the negative electrode of the unidirectional conduction device is the positive output end of the power supply device, and the negative output end of the switching power supply is the negative output end of the power supply device;
The positive electrode of the energy storage battery is connected with the negative electrode of the unidirectional conduction device, and the negative electrode of the energy storage battery is connected with the negative output end of the power supply device through the first switch circuit.
In a possible implementation manner of the first aspect, the power supply device further includes: the adjustable resistor, the second switching circuit and the third switching circuit;
The second switch circuit is connected in series between the first switch circuit and the negative electrode of the energy storage battery;
the adjustable resistor and the third switch circuit are connected in series to obtain a series branch, one end of the series branch is connected with the positive electrode of the energy storage battery, and the other end of the series branch is connected to the common end of the first switch circuit and the second switch circuit.
In another possible implementation manner of the first aspect, the power supply device further includes: and the fourth switching circuit is connected in series between the positive output end of the switching power supply and the unidirectional conduction device.
In a further possible implementation manner of the first aspect, the power supply device further includes: and the voltage stabilizing circuit is connected in parallel between the positive output end and the negative output end of the switching power supply.
In a further possible implementation manner of the first aspect, the first switching circuit, the second switching circuit, the third switching circuit and the fourth switching circuit are any one of a switching tube, a relay and a contactor.
In a second aspect, the present application also provides a control method of a power supply apparatus for controlling the power supply apparatus according to any one of the first aspect, the method comprising:
controlling the power supply device to provide the electric energy and the charging electric energy required by normal operation for the target object under the condition that the target object is in the charging mode;
And controlling the power supply device to supply the electric energy required by normal operation for the target object and absorb the discharge electric energy of the target object under the condition that the target object is in the discharge mode.
In a possible implementation manner of the second aspect, the power supply device includes the first switch circuit;
and controlling the power supply device to provide the electric energy and the charging electric energy required by normal operation for the target object under the condition that the target object is in the charging mode, wherein the method comprises the following steps of:
And controlling the first switching circuit to be in an off state, and providing electric energy and charging electric energy required by normal operation for the target object by the switching power supply.
In another possible implementation manner of the second aspect, the power supply device includes a fourth switching circuit and the first switching circuit;
and controlling the power supply device to provide the electric energy and the charging electric energy required by normal operation for the target object under the condition that the target object is in the charging mode, wherein the method comprises the following steps of:
and under the condition that the voltage of the energy storage battery is higher than a first preset voltage value, controlling the fourth switch circuit to be in an open state, and controlling the first switch circuit to be in a closed state, wherein the energy storage battery provides electric energy and charging electric energy required by normal operation for the target object.
In a further possible implementation manner of the second aspect, the power supply device includes the first switching circuit;
And controlling the power supply device to provide the electric energy required by normal operation for the target object and absorb the discharge electric energy of the target object under the condition that the target object is in the discharge mode, wherein the method comprises the following steps:
And under the condition that the target object is in a discharging mode and the voltage of the energy storage battery is lower than a second preset voltage value, controlling the first switch circuit to be closed, providing the electric energy required by normal operation for the target object by the switch power supply, and absorbing the discharging electric energy of the target object by the energy storage battery.
In a further possible implementation manner of the second aspect, the power supply device includes a first switching circuit, an adjustable resistor, a second switching circuit, and a third switching circuit;
And controlling the power supply device to provide the electric energy required by normal operation for the target object and absorb the discharge electric energy of the target object under the condition that the target object is in the discharge mode, wherein the method comprises the following steps:
The first switching circuit and the third switching circuit are controlled to be in a closed state and the second switching circuit is controlled to be in an open state, the switching power supply supplies electric energy required by normal operation for the target object, and the adjustable resistor absorbs discharge electric energy of the target object.
In another possible implementation manner of the second aspect, the power supply device includes a first switch circuit, an adjustable resistor, a second switch circuit, and a third switch circuit; the method further comprises the steps of:
and under the condition that the voltage of the energy storage battery is higher than a first preset voltage value, controlling the second switch circuit and the third switch circuit to be in a closed state, and controlling the first switch circuit to be in an open state, wherein the energy storage battery discharges through the adjustable resistor.
In a further possible implementation manner of the second aspect, the method further includes:
And when the voltage of the energy storage battery is lower than a second preset voltage value, controlling the third switching circuit to be in an off state.
In a third aspect, the present application also provides a test system of a battery management system, including: a battery management system to be tested, a battery to be tested, and the power supply device according to any one of the first aspects;
The tested battery is connected with a control port of the tested battery management system;
the power port of the tested battery management system is connected with the output end of the power supply device, and the state of the power supply device is controlled according to the working mode of the tested battery management system.
The power supply device comprises a switching power supply and a unidirectional conduction device, wherein the positive electrode of the unidirectional conduction device is connected with the positive output end of the switching power supply, and the negative electrode of the switching power supply and the negative electrode of the unidirectional conduction device are the positive output end and the negative output end of the power supply device; and the positive output end of the power supply device is connected with the positive electrode of the energy storage battery, and the negative output end of the power supply device is connected with the negative electrode of the energy storage battery through the first switch circuit. The power supply device can provide electric energy required by normal operation for the connected target object, and can also provide charging electric energy for the target object when the target object is in a charging mode; when the target object is in a discharging mode, the energy storage battery absorbs the discharging electric energy of the target object, so that the loss of the switching power supply is reduced. In addition, when the target object is in a discharge mode, the unidirectional conduction device is in a reverse cut-off state, so that the influence of reverse voltage on the switching power supply is avoided, the reverse voltage stress of the switching power supply is reduced, the stress requirement of the switching power supply is reduced, and finally the cost of the power supply device is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a power supply device according to an embodiment of the present application;
Fig. 2 is a schematic diagram of a working state of a power supply device when a connected object is in a charging mode according to an embodiment of the present application;
Fig. 3 is a schematic diagram of an operating state of a power supply device when a connected object is in a discharging mode according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of another power supply device according to an embodiment of the present application;
Fig. 5 is a schematic diagram of an operating state of another power supply device according to an embodiment of the present application when a connected object is in a charging mode;
Fig. 6 is a schematic diagram of another working state of another power supply device provided in an embodiment of the present application when a connected object is in a charging mode;
fig. 7 is a schematic diagram of an operating state of another power supply device according to an embodiment of the present application when a connected object is in a discharging mode;
fig. 8a is a schematic structural diagram of a power supply device according to another embodiment of the present application;
fig. 8b is a schematic structural diagram of still another power supply device according to an embodiment of the present application;
Fig. 9 is a schematic diagram of a working state of a power supply device according to another embodiment of the present application when a connected object is in a charging mode;
Fig. 10 is a schematic diagram of another working state of the power supply device according to the embodiment of the present application when the connected object is in the charging mode;
FIG. 11 is a schematic diagram of still another power supply device according to an embodiment of the present application in a discharge mode when a connected object is in a discharge mode;
fig. 12 is a schematic view of another working state of the power supply device according to the embodiment of the present application when the connected object is in the discharging mode;
fig. 13 is a schematic view illustrating a discharging operation state of an energy storage battery in still another power supply device according to an embodiment of the present application;
fig. 14 is a schematic diagram of an operation flow of a power supply device when a connected object is in a discharging mode according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, a schematic structural diagram of a power supply device according to an embodiment of the present application is shown, where the power supply device may include a switching power supply, a unidirectional conductive device D1, an energy storage battery, and a first switching circuit K1.
The positive output end P+ of the switching power supply is connected with the positive electrode of the unidirectional conduction device D1, the negative electrode of the unidirectional conduction device D1 is the positive output end OUT+ of the power supply device, and the negative output end P-of the switching power supply is the negative output end OUT-of the power supply device.
The positive electrode of the energy storage battery is connected with the negative electrode of the unidirectional conduction device D1, and the negative electrode of the energy storage battery is connected with the negative output end OUT-of the power supply device through the first switch circuit K1.
In one embodiment of the application, the switching power supply is a single-phase direct current power supply and can output a power supply with adjustable voltage and current.
The unidirectional conduction device D1 is turned on in one direction and turned off in the opposite direction, so that the reverse voltage output by the object connected with the power supply device is prevented from being applied to the switching power supply.
In one embodiment of the present application, the unidirectional conductive device D1 may employ any one of a diode, a switching tube, a relay, and a contactor. The first switching circuit K1 adopts any one of a switching tube, a relay, and a contactor.
Preferably, as shown in fig. 1, the power supply device further includes a voltage stabilizing circuit D2 connected in parallel between the output terminals of the switching power supply. The voltage stabilizing circuit D2 is used for protecting the switching power supply by voltage clamping.
The operation of the power supply device when the connected object is in different modes will be described below with reference to fig. 2 and 3:
Referring to fig. 2, a schematic diagram of an operation mode of a power supply device according to an embodiment of the present application when a target object connected to the power supply device is in a charging mode is shown, as shown in fig. 2, an output terminal of the power supply device is connected to the target object, and the embodiment uses the target object as a battery device with a BMS as an example.
The present embodiment will be described with reference to a test for testing an active equalization function of a Battery management system (Battery MANAGEMENT SYSTEM, BMS) in a Battery device. Of course, the power supply device is not limited to the active equalization function test scenario of the BMS, and may be applied to other application scenarios with power supply and charge and discharge requirements, for example, the power supply device may be used as a maintenance tool of the battery device, or other applications with power supply and discharge requirements will not be repeated here.
The BMS generally has an active balancing function, i.e., can realize balancing control of each battery inside a battery pack controlled by the BMS by charging and discharging an external power supply device.
For example, in an application scenario of testing an active balancing function, it is generally necessary to use a power supply device and a BMS and a battery pack controlled by the BMS to complete the test of the active balancing function, but the requirement on the power supply device is high, when the BMS is in a charged state (i.e., a state in which the battery pack controlled by the BMS is charged), the power supply device is required to output voltage and current to charge the battery pack, and at the same time, when the BMS is in a discharged state (i.e., a state in which the battery pack controlled by the BMS is discharged), the power supply device is required to absorb the discharge current for a long time.
1) BMS is in charging mode
When BMS is in charge mode, the battery under test that BMS connects is in charge state promptly, and under this kind of circumstances, first switch circuit K1 is in the off-state, and the normal work of BMS is guaranteed to a part of switching power supply output's electric energy, and another part is the battery under test charge.
2) The BMS is in discharge mode
When the BMS is in a discharging mode, namely, the battery to be tested connected with the BMS is in a discharging state, as shown in fig. 3, when the BMS is in the discharging mode, the battery to be tested starts to charge the BMS, an internal circuit of the BMS outputs the current through conversion, at the moment, the voltage Vab of the AB node is raised, the BMS starts to discharge, and reverse voltage cannot be applied to the P+ and P-two ends of the switching power supply due to the existence of the unidirectional conduction device D1, so that the switching power supply has no reverse voltage stress risk. In this case, the first switching circuit K1 is in a closed state, and the power output from the BMS is supplied to the energy storage battery, i.e., the energy storage battery absorbs the power released from the BMS, and the current direction is shown by the dotted line with an arrow.
In one embodiment of the application, the switching state of each switching circuit may be controlled by a control circuit in the energy storage battery or a connected target object, or also support manual control of the switching state of each switching circuit.
The power supply device provided by the embodiment can provide the electric energy required by normal operation for the connected target object, and can also provide the charging electric energy for the target object when the target object is in the charging mode; when the target object is in a discharging mode, the energy storage battery absorbs the discharging electric energy of the target object, so that the loss of the switching power supply is reduced. In addition, when the target object is in a discharge mode, the unidirectional conduction device is in a reverse cut-off state, so that the influence of reverse voltage on the switching power supply is avoided, the reverse voltage stress of the switching power supply is reduced, the stress requirement of the switching power supply is reduced, and finally the cost of the power supply device is reduced.
Referring to fig. 4, a schematic structural diagram of another power supply device according to an embodiment of the present application is shown, where the power supply device further includes, based on the embodiment shown in fig. 1: and a fourth switching circuit K0 connected in series between the switching power supply and the unidirectional conductive device D1.
The fourth switch circuit K0 is used for controlling the switching power supply to be connected with or disconnected from the subsequent-stage circuit.
In one embodiment of the present application, the fourth switching circuit K0 may employ any one of a switching tube, a relay, and a contactor.
The working procedure of the power supply device according to the present embodiment will be described with reference to fig. 5 to 7:
1) BMS is in charging mode
The BMS is in a charging mode, i.e., the battery to be tested to which the BMS is connected is in a charging state, and in one possible implementation, as shown in fig. 5, the fourth switching circuit K0 is in a closed state, and the first switching circuit K1 is in an open state. In this state, the switching power supply supplies power required for normal operation of the BMS, and the switching power supply supplies charging power to the BMS.
In another possible implementation, the voltage of the energy storage battery is greater than a first preset voltage value (i.e., meets the charging requirement of the BMS), in which case the energy storage battery may provide power to the BMS. As shown in fig. 6, the fourth switching circuit K0 is controlled to be opened, the first switching circuit K1 is closed, i.e., the switching power supply is opened, and the energy storage battery supplies power required for the normal operation of the BMS and supplies power to the BMS.
The first preset voltage value may be set according to parameters of the BMS to which the power supply device is connected, and is not limited herein.
2) The BMS is in discharge mode
The BMS is in a charging mode, that is, the battery to be tested to which the BMS is connected is in a charging state, and in this state, as shown in fig. 7, the fourth circuit K0 is in a closed state, and the switching power supply supplies power required for the normal operation of the BMS. And, the first switching circuit K1 is in a closed state, and discharge power of the BMS is absorbed by the energy storage battery.
The power supply device that this embodiment provided still is provided with fourth switch circuit between switch power supply and unidirectional current device, and the state of switch power supply access later stage circuit is controlled through the on-off state of control fourth switch circuit, and when the BMS that power supply device connects was in charging mode, and the voltage of energy storage battery satisfies BMS's charge demand, open fourth switch circuit to and close first switch circuit, in order to realize providing the required electric energy of normal work for BMS by energy storage battery, and charge the electric energy, improved energy storage battery's electric energy utilization, further reduced switch power supply's loss.
Fig. 8a is a schematic structural diagram of another power supply device according to an embodiment of the present application.
As shown in fig. 8a, the power supply device further includes, on the basis of the embodiment shown in fig. 1: an adjustable resistor R1, a second switching circuit K2 and a third switching circuit K3.
The second switch circuit K2 is connected in series between the first switch circuit K1 and the negative electrode of the energy storage battery.
The adjustable resistor R1 and the third switching current K3 are connected in series to obtain a series branch, one end of the series branch is connected with the positive electrode of the energy storage battery, and the other end of the series branch is connected with the common end of the first switching circuit K1 and the second switching circuit K2.
The adjustable resistor R1 has two functions, namely, the discharge is carried out through the adjustable resistor when the voltage of the energy storage battery is too high; and secondly, the adjustable resistor can be directly used for absorbing the discharging electric energy of the BMS.
In another embodiment of the present application, as shown in fig. 8b, a fourth switch K4 may be further connected in series between the switching power supply and the unidirectional conductive device D1 on the basis of the embodiment shown in fig. 8 a.
In one embodiment of the present application, the fourth switch circuit K4 may employ any one of a switching tube, a relay, and a contactor. And controlling whether the switching power supply is connected to the power supply device or not by controlling the switching state of the K4.
The operation of the power supply device shown in fig. 8b will be described with reference to fig. 9 to 14:
1) BMS is in charging mode
In one possible implementation, as shown in fig. 9, the fourth switching circuit K0 is in a closed state, and the first switching circuit K1, the second switching circuit K2, and the third switching circuit K3 are all in an open state. In this case, the power required for normal operation of the BMS and the power required for charging the BMS are supplied to the BMS by the switching power supply.
In another possible implementation, the voltage of the energy storage battery satisfies the charging voltage requirement of the BMS (i.e., the voltage of the energy storage battery is greater than the first preset voltage value), in which case the energy storage battery may provide power to the BMS.
As shown in fig. 10, the fourth switching circuit K0 is in an open state, the first switching circuit K1, the second switching circuit K2 are in a closed state, and the third switching circuit K3 is in an open state. The energy storage battery provides the BMS with electric energy required for normal operation and electric energy required for BMS charging.
2) The BMS is in discharge mode
The following will respectively describe different working procedures of the power supply device in different application scenarios when the BMS is in the discharging mode with reference to the flowchart shown in fig. 14:
In an application scenario, when the voltage of the energy storage battery is lower, that is, the voltage of the energy storage battery is lower than the second preset voltage value, the energy storage battery may be used to absorb the electric energy discharged by the BMS, in which case, as shown in fig. 11 and 14, the first switch circuit K1 and the second switch circuit K2 are in a closed state, and the third switch circuit K3 is in an open state (S10). In this case, the discharge power of the battery under test charges the energy storage battery through the BMS (S11). Detecting the voltage Vab at two points A, B to judge whether the BMS finishes discharging, if the voltage Vab is higher than a set value, indicating that the BMS is still in a discharging state, and continuously charging the energy storage battery; if the BMS is lower than the set value, it indicates that the BMS has completed discharging, and switches K1 and K2 off (S12).
Meanwhile, K0 is closed to provide voltage required by normal operation for the BMS, and the unidirectional conduction device D1 is in a reverse cut-off state at the moment, so that the reverse voltage output by the BMS does not influence the switching power supply.
In another application scenario, the voltage of the energy storage battery is higher, that is, the voltage of the energy storage battery is higher than the second preset voltage value, at this time, the energy storage battery cannot continuously absorb the discharging electric energy of the BMS, and if the BMS discharging cannot be suspended, as shown in fig. 12 and 14, the second switch circuit K2 is in an open state, the first switch circuit K1 and the third switch circuit K3 are in a closed state (S31), and the discharging electric energy of the BMS is absorbed by using the adjustable resistor (S32). Detecting the voltage Vab at two points A, B to judge whether the BMS finishes discharging, if the voltage Vab is higher than a set value, indicating that the BMS is still in a discharging state, and continuously utilizing the adjustable resistor to absorb the discharging electric energy of the BMS; if the BMS is lower than the set value, it indicates that the BMS has completed discharging, and K1 and K3 are disconnected (S33).
When the BMS is in a discharging mode, the battery to be tested starts to charge the BMS, the internal circuit of the BMS outputs the current through conversion, at the moment, the voltage Vab of the A, B node is raised, the BMS starts to discharge, and the reverse voltage cannot be applied to the P+ and P-two ends of the switching power supply due to the existence of the unidirectional conduction device D1, so that the switching power supply has no reverse voltage stress risk. In this state, the current output from the BMS is directly consumed through the third switching circuit K3 and the adjustable resistor, and the current direction is shown as a dotted line with an arrow in the figure.
In still another application scenario, in the process that the energy storage battery absorbs the electric energy released by the BMS, there is a situation that the capacity is full, resulting in a voltage rise of the energy storage battery, and thus the BMS cannot continue to discharge, and in this case, a loop needs to be provided to discharge the energy of the energy storage battery, so as to continue to absorb the electric energy released by the BMS.
In this case, as shown in fig. 13 and 14, the first switching circuit K1 is in an open state, the second switching circuit K2 and the third switching circuit K3 are in a closed state (S21), the energy storage battery is discharged through the adjustable resistor R1 (S22), after the voltage of the energy storage battery is reduced to a second preset voltage value, the third switching circuit K3 is opened (S23), and whether the first switching circuit K1 is closed is determined to continue to test the active balancing function of the BMS or whether the second switching circuit K2 and the third switching circuit K3 are opened according to actual requirements, and the active balancing function test of the BMS is stopped.
The second preset voltage value can be determined according to the self-parameters of the energy storage battery.
In the power supply device provided by the embodiment, a second switch circuit is further arranged between the cathode of the energy storage battery and the first switch circuit; the third switching circuit and the adjustable resistor are connected in series to obtain a series branch, one end of the series branch is connected with the positive electrode of the battery, and the other end of the series branch is connected with the common end of the first switching circuit and the second switching circuit. In the discharging process of the connected BMS, if the voltage of the energy storage battery is higher, when the BMS can not continue to discharge, the first switch circuit is opened, the second switch circuit and the third switch circuit are closed at the same time, and the energy storage battery discharges through the adjustable resistor, so that the energy storage battery can continue to absorb the discharging electric energy of the target object. In addition, the power supply device can directly absorb the electric energy released by the BMS through the adjustable resistor, and can provide various electric energy absorption paths matched with the discharging mode so as to meet different requirements of target objects.
On the other hand, the embodiment of the application also provides a test system of the battery management system, which can be used for testing the active balancing function of the battery management system, and comprises the power supply device, the battery to be tested and the BMS to be tested.
The battery to be tested is connected with the control port of the BMS to be tested, the power port of the BMS to be tested is connected with the positive output end and the negative output end of the power supply device, and the state of the power supply device is controlled according to the working mode of the BMS to be tested. The working state of the power supply device is detailed in the above embodiment of the power supply device, and will not be described herein.
For the foregoing method embodiments, for simplicity of explanation, the methodologies are shown as a series of acts, but one of ordinary skill in the art will appreciate that the present invention is not limited by the order of acts, as some steps may, in accordance with the present invention, occur in other orders or concurrently. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily required for the present invention.
It should be noted that the technical features described in each embodiment in this specification may be replaced or combined with each other, and each embodiment is mainly described in a different manner from other embodiments, and identical and similar parts between the embodiments are referred to each other. For the apparatus class embodiments, the description is relatively simple as it is substantially similar to the method embodiments, and reference is made to the description of the method embodiments for relevant points.
The steps in the method of the embodiments of the present application may be sequentially adjusted, combined, and deleted according to actual needs.
The device and the modules and the submodules in the terminal in the embodiments of the application can be combined, divided and deleted according to actual needs.
In the embodiments provided in the present application, it should be understood that the disclosed terminal, apparatus and method may be implemented in other manners. For example, the above-described terminal embodiments are merely illustrative, and for example, the division of modules or sub-modules is merely a logical function division, and there may be other manners of division in actual implementation, for example, multiple sub-modules or modules may be combined or integrated into another module, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or modules, which may be in electrical, mechanical, or other forms.
The modules or sub-modules illustrated as separate components may or may not be physically separate, and components that are modules or sub-modules may or may not be physical modules or sub-modules, i.e., may be located in one place, or may be distributed over multiple network modules or sub-modules. Some or all of the modules or sub-modules may be selected according to actual needs to achieve the purpose of the embodiment.
In addition, each functional module or sub-module in the embodiments of the present application may be integrated in one processing module, or each module or sub-module may exist alone physically, or two or more modules or sub-modules may be integrated in one module. The integrated modules or sub-modules may be implemented in hardware or in software functional modules or sub-modules.
Finally, it is further noted that 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. Moreover, 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 phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. 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 invention. Thus, the present invention 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.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (10)
1. A power supply device, comprising: the switching power supply, the unidirectional conduction device, the energy storage battery, the first switching circuit, the adjustable resistor, the second switching circuit and the third switching circuit;
The positive output end of the switching power supply is connected with the positive electrode of the unidirectional conduction device, the negative electrode of the unidirectional conduction device is the positive output end of the power supply device, and the negative output end of the switching power supply is the negative output end of the power supply device;
The positive electrode of the energy storage battery is connected with the negative electrode of the unidirectional conduction device, and the negative electrode of the energy storage battery is connected with the negative output end of the power supply device through the first switch circuit;
The second switch circuit is connected in series between the first switch circuit and the negative electrode of the energy storage battery;
the adjustable resistor and the third switching circuit are connected in series to obtain a series branch, one end of the series branch is connected with the positive electrode of the energy storage battery, and the other end of the series branch is connected to the common end of the first switching circuit and the second switching circuit;
When a target object is in a discharging mode, the first switching circuit and the third switching circuit are controlled to be in a closed state, the second switching circuit is controlled to be in an open state, the switching power supply supplies electric energy required by normal operation for the target object, and the adjustable resistor absorbs the discharging electric energy of the target object;
and under the condition that the voltage of the energy storage battery is higher than a first preset voltage value, controlling the second switch circuit and the third switch circuit to be in a closed state, and controlling the first switch circuit to be in an open state, wherein the energy storage battery discharges through the adjustable resistor.
2. The power supply device according to claim 1, characterized by further comprising: and the fourth switching circuit is connected in series between the positive output end of the switching power supply and the unidirectional conduction device.
3. The power supply device according to claim 1, characterized by further comprising: and the voltage stabilizing circuit is connected in parallel between the positive output end and the negative output end of the switching power supply.
4. The power supply device according to claim 2, wherein the first switching circuit, the second switching circuit, the third switching circuit, and the fourth switching circuit are each any one of a switching tube, a relay, and a contactor.
5. A control method of a power supply apparatus, characterized by being used for controlling the power supply apparatus according to any one of claims 1 to 4, the method comprising:
controlling the power supply device to provide the electric energy and the charging electric energy required by normal operation for the target object under the condition that the target object is in a charging mode;
And controlling the power supply device to supply the electric energy required by normal operation for the target object and absorb the discharge electric energy of the target object under the condition that the target object is in the discharge mode.
6. The method of claim 5, wherein the power supply device comprises the first switching circuit;
and controlling the power supply device to provide the electric energy and the charging electric energy required by normal operation for the target object under the condition that the target object is in the charging mode, wherein the method comprises the following steps of:
And controlling the first switching circuit to be in an off state, and providing electric energy and charging electric energy required by normal operation for the target object by the switching power supply.
7. The method of claim 5, wherein the power supply device comprises a fourth switching circuit and the first switching circuit;
and controlling the power supply device to provide the electric energy and the charging electric energy required by normal operation for the target object under the condition that the target object is in the charging mode, wherein the method comprises the following steps of:
and under the condition that the voltage of the energy storage battery is higher than a first preset voltage value, controlling the fourth switch circuit to be in an open state, and controlling the first switch circuit to be in a closed state, wherein the energy storage battery provides electric energy and charging electric energy required by normal operation for the target object.
8. The method of claim 5, wherein the power supply device comprises the first switching circuit;
And controlling the power supply device to provide the electric energy required by normal operation for the target object and absorb the discharge electric energy of the target object under the condition that the target object is in the discharge mode, wherein the method comprises the following steps:
And under the condition that the target object is in a discharging mode and the voltage of the energy storage battery is lower than a second preset voltage value, controlling the first switch circuit to be closed, providing the electric energy required by normal operation for the target object by the switch power supply, and absorbing the discharging electric energy of the target object by the energy storage battery.
9. The method of claim 5, wherein the method further comprises:
And when the voltage of the energy storage battery is lower than a second preset voltage value, controlling the third switching circuit to be in an off state.
10. A test system for a battery management system, comprising: a battery management system to be tested, a battery to be tested, and the power supply apparatus of any one of claims 1 to 4;
The tested battery is connected with a control port of the tested battery management system;
the power port of the tested battery management system is connected with the output end of the power supply device, and the state of the power supply device is controlled according to the working mode of the tested battery management system.
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| CN202110441287.1A CN112928809B (en) | 2021-04-23 | 2021-04-23 | Power supply device, control method and system |
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| CN202110441287.1A CN112928809B (en) | 2021-04-23 | 2021-04-23 | Power supply device, control method and system |
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Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2700893Y (en) * | 2004-02-06 | 2005-05-18 | 毛广甫 | Power control apparatus for battery testing |
| CN102260785A (en) * | 2011-07-23 | 2011-11-30 | 浙江大学 | Residual stress relieving device based on high-energy electrical pulses generated by discharge of capacitor |
| CN102307026A (en) * | 2011-08-29 | 2012-01-04 | 苏州盖娅智能科技有限公司 | Intermittent working system and control method for solar energy application system |
| CN202193820U (en) * | 2011-07-23 | 2012-04-18 | 浙江大学 | Residual stress eliminating device using high-energy electric pulse generated in discharge of capacitor |
| CN102437599A (en) * | 2011-10-17 | 2012-05-02 | 上海交通大学 | New electric energy recycling device of electric vehicle |
| CN105071525A (en) * | 2015-08-25 | 2015-11-18 | 重庆雅讯电源技术有限公司 | Uninterruptible power supply system |
| CN205178602U (en) * | 2015-12-18 | 2016-04-20 | 中船重工远舟（北京）科技有限公司 | Online energy storage system's control of charge and discharge circuit |
| CN106685016A (en) * | 2017-03-17 | 2017-05-17 | 维沃移动通信有限公司 | Charging device and control method |
| CN108899952A (en) * | 2018-07-25 | 2018-11-27 | 维沃移动通信有限公司 | A kind of more battery charging and discharging devices and mobile terminal |
| CN209329762U (en) * | 2019-02-27 | 2019-08-30 | 广州宝狮新能源有限公司 | A kind of and energy storage and uninterruptible power supply system |
| CN110406431A (en) * | 2018-04-26 | 2019-11-05 | 武汉众宇动力系统科技有限公司 | Electric power supply system of fuel cell and its electricity for unmanned plane adjust can present be absorbed and utilized circuit and it is electric adjust to present method is absorbed and utilized |
| CN111446765A (en) * | 2018-12-28 | 2020-07-24 | 远景能源（江苏）有限公司 | Battery charging and discharging device and rechargeable power supply |
| CN112165156A (en) * | 2020-09-23 | 2021-01-01 | 深圳市拓邦锂电池有限公司 | Charging/discharging device, battery system, charging/discharging control method, and storage medium |
| WO2021012219A1 (en) * | 2019-07-24 | 2021-01-28 | 深圳欣锐科技股份有限公司 | Charging and discharging circuit, vehicle-mounted charging and discharging system, and charging and discharging method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2003901730A0 (en) * | 2003-04-11 | 2003-05-01 | Cochlear Limited | Power management system |
-
2021
- 2021-04-23 CN CN202110441287.1A patent/CN112928809B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2700893Y (en) * | 2004-02-06 | 2005-05-18 | 毛广甫 | Power control apparatus for battery testing |
| CN102260785A (en) * | 2011-07-23 | 2011-11-30 | 浙江大学 | Residual stress relieving device based on high-energy electrical pulses generated by discharge of capacitor |
| CN202193820U (en) * | 2011-07-23 | 2012-04-18 | 浙江大学 | Residual stress eliminating device using high-energy electric pulse generated in discharge of capacitor |
| CN102307026A (en) * | 2011-08-29 | 2012-01-04 | 苏州盖娅智能科技有限公司 | Intermittent working system and control method for solar energy application system |
| CN102437599A (en) * | 2011-10-17 | 2012-05-02 | 上海交通大学 | New electric energy recycling device of electric vehicle |
| CN105071525A (en) * | 2015-08-25 | 2015-11-18 | 重庆雅讯电源技术有限公司 | Uninterruptible power supply system |
| CN205178602U (en) * | 2015-12-18 | 2016-04-20 | 中船重工远舟（北京）科技有限公司 | Online energy storage system's control of charge and discharge circuit |
| CN106685016A (en) * | 2017-03-17 | 2017-05-17 | 维沃移动通信有限公司 | Charging device and control method |
| CN110406431A (en) * | 2018-04-26 | 2019-11-05 | 武汉众宇动力系统科技有限公司 | Electric power supply system of fuel cell and its electricity for unmanned plane adjust can present be absorbed and utilized circuit and it is electric adjust to present method is absorbed and utilized |
| CN108899952A (en) * | 2018-07-25 | 2018-11-27 | 维沃移动通信有限公司 | A kind of more battery charging and discharging devices and mobile terminal |
| CN111446765A (en) * | 2018-12-28 | 2020-07-24 | 远景能源（江苏）有限公司 | Battery charging and discharging device and rechargeable power supply |
| CN209329762U (en) * | 2019-02-27 | 2019-08-30 | 广州宝狮新能源有限公司 | A kind of and energy storage and uninterruptible power supply system |
| WO2021012219A1 (en) * | 2019-07-24 | 2021-01-28 | 深圳欣锐科技股份有限公司 | Charging and discharging circuit, vehicle-mounted charging and discharging system, and charging and discharging method |
| CN112165156A (en) * | 2020-09-23 | 2021-01-01 | 深圳市拓邦锂电池有限公司 | Charging/discharging device, battery system, charging/discharging control method, and storage medium |
Non-Patent Citations (2)
| Title |
|---|
| Research on Adaptive Switching Power Supply Control Technology;Zhang Hong等;《2018 IEEE International Conference of Safety Produce Informatization (IICSPI) 》;20190414;全文 * |
| 脉冲电源储能电容反向充电电压释放方法;刘建宝;邵英;秦昕昕;;电机与控制学报;20170815(第08期);全文 * |
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