CN113675909A - Wide-range high-power discharge device and method - Google Patents
Wide-range high-power discharge device and method Download PDFInfo
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- CN113675909A CN113675909A CN202110768341.3A CN202110768341A CN113675909A CN 113675909 A CN113675909 A CN 113675909A CN 202110768341 A CN202110768341 A CN 202110768341A CN 113675909 A CN113675909 A CN 113675909A
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000001514 detection method Methods 0.000 claims abstract description 52
- 230000006641 stabilisation Effects 0.000 claims abstract description 21
- 238000011105 stabilization Methods 0.000 claims abstract description 21
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 10
- 238000007599 discharging Methods 0.000 claims description 28
- 230000017525 heat dissipation Effects 0.000 claims description 26
- 230000002159 abnormal effect Effects 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 3
- 230000000977 initiatory effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 230000005855 radiation Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
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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
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
-
- 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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00306—Overdischarge protection
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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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
-
- 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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
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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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
- H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
- H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
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Abstract
The invention relates to a wide-range high-power discharge device and a method, comprising the following steps: the device comprises a storage battery pack, a control device, a discharge detection module, a discharge load and a discharge current stabilizing system; the storage battery pack is used for outputting a discharge signal during discharge; the discharge detection module is used for detecting a discharge signal of the storage battery pack and outputting the discharge detection signal to the control device when the storage battery pack discharges; the control device is used for setting the discharge resistance value of the discharge load according to the initial voltage of the storage battery pack and preset discharge parameters before the storage battery pack discharges, and outputting a feedback signal to the discharge current stabilization system according to the discharge detection signal when the storage battery pack discharges; and the discharge current stabilization system is used for adjusting a discharge signal of the storage battery pack by adopting a preset control algorithm according to the feedback signal. The invention can set the discharge load resistance value according to the initial voltage and the preset discharge parameters of the storage battery, realize the wide-range high-power discharge and also realize the constant-current or constant-power discharge.
Description
Technical Field
The invention relates to the technical field of battery discharge control, in particular to a wide-range high-power discharge device and a method.
Background
In industries such as electric power and communication, a direct current system is required to supply power to a load, when alternating current power supply is normal, a charging device charges a storage battery and supplies power to the load, and when alternating current power fails, the storage battery supplies power to the load. At this time, the capacity of the storage battery satisfies the discharge capacity during the power failure time due to the failure: the method comprises the steps of starting current of a direct current motor at the initial stage of an accident and other impact load current; and also includes the random load current superimposed in the storage battery lasting discharge time; with the increasingly large capacity of modern power systems and communication systems, higher requirements are placed on the working reliability of direct current systems, and storage batteries must be ensured to supply power to loads when an alternating current power supply system fails, otherwise, heavy loss is caused, so that the storage batteries must be periodically checked to ensure that the batteries can supply power safely and stably. When the storage battery is put into use, the discharged capacity cannot meet the requirement, the load cannot work normally, and abnormal power failure occurs, so that the storage battery pack needs to be maintained regularly, the capacity discharge is checked, the health condition of the storage battery is ensured to be good, and the sufficient capacity can be released when the storage battery is used.
The storage battery discharging device converts the electric energy stored by the storage battery into heat energy to be released, and calculates the actual storage capacity of the storage battery by counting the electric energy released by the storage battery. When the storage battery is used, according to actual requirements, a direct current system with multiple specifications is provided, the voltage grades of the common direct current system are 24V, 48V, 110V, 220V and the like, then different storage battery capacities are provided according to load requirements and power supply time requirements, and the capacity range of the common storage battery is 100 Ah-3000 Ah; therefore, when the storage battery is used for checking the capacity, the voltage grade and the capacity grade of the storage battery set determine the specification of the discharge instrument required to be selected.
However, since the voltage class of the dc system and the capacity specification of the storage battery are large, the specification and the model of the discharge instrument are large, so that a user needs to purchase the discharge instruments with a plurality of specifications and models, which causes resource waste and is inconvenient to use.
Disclosure of Invention
The present invention is directed to a wide-range high-power discharge device and method, which overcome the above-mentioned drawbacks of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: constructing a wide range high power discharge device comprising: the device comprises a storage battery pack, a control device, a discharge detection module, a discharge load and a discharge current stabilizing system;
the storage battery pack is used for outputting a discharge signal during discharge;
the discharge detection module is used for detecting a discharge signal of the storage battery pack and outputting the discharge detection signal to the control device when the storage battery pack discharges;
the control device is used for setting a discharge resistance value of the discharge load according to the initial voltage of the storage battery pack and preset discharge parameters before the storage battery pack discharges, and outputting a feedback signal to the discharge current stabilizing system according to the discharge detection signal when the storage battery pack discharges;
and the discharge current stabilization system is used for adjusting a discharge signal of the storage battery pack by adopting a preset control algorithm according to the feedback signal.
Wherein the discharge detection module includes: a battery voltage detection circuit;
the storage battery voltage detection circuit is used for detecting the initial voltage of a storage battery pack and the discharge voltage of the storage battery pack when the storage battery pack discharges, and sending the initial voltage and the discharge voltage to the control device.
Wherein the discharge detection module further comprises: a battery current detection circuit;
the storage battery current detection circuit is used for detecting the discharge current of the storage battery pack in the discharge process of the storage battery pack and sending the discharge current to the control device.
Wherein, still include: and the heat dissipation device is connected with the control device and is used for cooling the storage battery pack in the discharging process of the storage battery pack.
Wherein, still include: and the heat dissipation detection circuit is connected with the control device, detects the working current of the heat dissipation device in the working process of the heat dissipation device and sends the working current to the control device.
Wherein, still include: and the temperature detection device is connected with the control device and is used for detecting the temperature of the wide-range high-power discharge device.
Wherein, still include: and the main switch is connected with the temperature detection device and used for cutting off the power supply according to the control of the temperature detection device.
Wherein the discharge load includes: a plurality of series resistors and a plurality of switches;
each of the plurality of switches is disposed in parallel with one or more of the plurality of series resistors.
Wherein, still include: and the display device is connected with the control device and is used for displaying the discharge information of the wide-range high-power discharge device.
The invention also provides a wide-range high-power discharge method, which comprises the following steps:
receiving a discharge starting instruction;
acquiring a preset discharge parameter according to the discharge starting instruction;
starting discharge according to the preset discharge parameters;
after starting discharge, acquiring discharge voltage and discharge current of the storage battery pack;
outputting a feedback signal to a discharge current stabilization system according to the discharge voltage, the discharge current and the preset discharge parameter;
and the discharge current stabilization system adjusts the discharge signal of the storage battery pack according to the feedback signal by adopting a preset control algorithm.
Wherein before starting discharging according to the preset discharging parameters, the method comprises the following steps:
acquiring the initial voltage of the storage battery pack;
setting a discharge resistance value of the discharge load according to the preset discharge parameters and the initial voltage of the storage battery pack;
and judging whether the storage battery meets a discharging condition or not according to the initial voltage, if so, executing a step of starting discharging according to the preset discharging parameters.
Wherein the method further comprises:
if the storage battery meets the discharge condition, starting a heat dissipation device;
after the heat dissipation device is started, judging whether the heat dissipation device is abnormal or not;
if not, after the heat dissipation device works normally, discharging is started.
The discharge current stabilization system adjusts the discharge signal of the storage battery pack according to the feedback signal by adopting a preset control algorithm, and the discharge current stabilization system comprises:
and the discharge current stabilization system adjusts the discharge signal of the storage battery pack by adopting an incremental PID control algorithm according to the feedback signal.
Wherein the method further comprises:
outputting and displaying the discharge information; the discharge information includes: the discharge signal of the storage battery pack, the resistance value of a discharge load and the working current of the heat dissipation device.
The wide-range high-power discharge device and the method have the following beneficial effects: the method comprises the following steps: the device comprises a storage battery pack, a control device, a discharge detection module, a discharge load and a discharge current stabilizing system; the storage battery pack is used for outputting a discharge signal during discharge; the discharge detection module is used for detecting a discharge signal of the storage battery pack and outputting the discharge detection signal to the control device when the storage battery pack discharges; the control device is used for setting the discharge resistance value of the discharge load according to the initial voltage of the storage battery pack and preset discharge parameters before the storage battery pack discharges, and outputting a feedback signal to the discharge current stabilization system according to the discharge detection signal when the storage battery pack discharges; and the discharge current stabilization system is used for adjusting a discharge signal of the storage battery pack by adopting a preset control algorithm according to the feedback signal. The invention can set the discharge load resistance value according to the initial voltage and the preset discharge parameters of the storage battery, realize the wide-range high-power discharge and also realize the rapid current stabilization or the constant-power discharge.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of a wide-range high-power discharge device provided by an embodiment of the present invention;
FIG. 2 is a circuit diagram of a discharge load combination provided by an embodiment of the present invention;
FIG. 3 is a schematic flow chart of a wide-range high-power discharge method provided by an embodiment of the invention;
fig. 4 is a circuit diagram of a wide-range high-power discharge device provided by an embodiment of the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a wide-range high-power discharge device provided by an embodiment of the present invention.
As shown in fig. 1, the wide-range high-power discharge device includes: the device comprises a storage battery pack, a control device 101, a discharge detection module, a discharge load 103 and a discharge current stabilizing system 102.
The storage battery pack is used for outputting a discharge signal when discharging; the discharge detection module is used for detecting a discharge signal of the storage battery pack and outputting the discharge detection signal to the control device 101 when the storage battery pack discharges; the control device 101 is used for setting a discharge resistance value of the discharge load 103 according to the initial voltage of the storage battery pack and preset discharge parameters before the storage battery pack discharges, and outputting a feedback signal to the discharge current stabilization system 102 according to a discharge detection signal when the storage battery pack discharges; the discharge current stabilization system 102 is configured to adjust a discharge signal of the storage battery pack according to the feedback signal by using a preset control algorithm.
In some embodiments, the discharge ballast system 102 may include: PID control circuit and IGBT drive circuit. The PID control circuit calculates a proper PWM duty ratio according to the discharge current and the discharge voltage of the storage battery pack and the discharge current parameters, loads the PWM signal to the IGBT drive circuit, and achieves the purpose of keeping the current or power effective value of the discharge loop stable and unchanged through the drive control of the IGBT drive circuit.
In some embodiments, the discharge detection module comprises: battery voltage detection circuit 104. The battery voltage detection circuit 104 is configured to detect an initial voltage of the battery pack and a discharge voltage of the battery pack when the battery pack is discharged, and transmit the initial voltage and the discharge voltage to the control device 101.
In some embodiments, the discharge detection module further comprises: battery current detection circuit 105. The battery current detection circuit 105 is configured to detect a discharge current of the battery pack during a battery pack discharge process, and to transmit the discharge current to the control device 101.
In some embodiments, the discharge voltage and the discharge current of the storage battery pack are detected in real time in the discharge process of the storage battery pack, so that the safety of the storage battery pack can be guaranteed, and the phenomenon that the storage battery pack is damaged due to over-discharge is prevented.
As shown in fig. 1, in some embodiments, the wide-range high-power discharge device further comprises: and the heat dissipation device 106 is connected with the control device 101 and is used for cooling the storage battery pack in the discharging process of the storage battery pack. Optionally, the heat sink 106 may include a fan.
As shown in fig. 1, in some embodiments, the method further includes: a heat radiation detection circuit 107 connected to the control device 101, detecting an operating current of the heat radiation device 106 during operation of the heat radiation device 106, and transmitting the operating current to the control device 101. By monitoring the working current of the heat dissipation device 106 in real time, the working state of the heat dissipation device 106 can be monitored in real time, and when the heat dissipation device 106 is over-current, the heat dissipation device 106 is controlled to stop working in time, so that damage is avoided.
In some embodiments, the wide range high power discharge device further comprises: and a temperature detection device 108 connected to the control device 101 for detecting the temperature of the wide-range high-power discharge device. Optionally, the temperature detecting device 108 may include: a temperature relay. In some embodiments, the temperature relay may include a plurality of temperature relays, and the plurality of temperature relays are disposed at a vulnerable point and/or a vulnerable point inside the discharging device.
In some embodiments, the wide range high power discharge device further comprises: and a main switch 109 connected to the temperature detection means 108 for cutting off the power supply according to the control of the temperature detection means 108.
In some embodiments, the plurality of thermorelay are connected in parallel to the separation tripping auxiliary point of the main switch 109, when the main controller is abnormal and is not controlled by the full-open PWM, the thermorelay can monitor the temperature, and when the internal temperature detected by any one or more of the plurality of thermorelay is greater than the threshold (third preset value) of the thermorelay, the main switch 109 is tripped to stop the discharge of the storage battery, thereby avoiding the occurrence of safety accident due to further thermal runaway.
Further, in some embodiments, the discharge load 103 includes: a plurality of series resistors and a plurality of switches. Wherein each of the plurality of switches is arranged in parallel with one or more of the plurality of series resistors. I.e. one switch may be arranged in parallel with one resistor, or one switch may be arranged in parallel with two series connected resistors, or one switch may be arranged in parallel with three series connected resistors, etc. By adopting the mode of combining the switch and the resistor, the required load can be adjusted and selected at will, and therefore the purpose of selecting the proper load resistor according to the preset discharge parameters is achieved.
Referring to fig. 2, fig. 2 is a combined circuit diagram of the discharging load 103 according to the embodiment of the present invention.
As shown in fig. 2, the discharge load 103 includes: resistor R1, resistor R2, resistor R3, resistor R4, switch K1, switch K2 and switch K3.
The resistor R1, the resistor R2, the resistor R3 and the resistor R4 are sequentially connected in series, the switch K1 is connected with the resistor R1 and the resistor R2 in parallel, the switch K2 is connected with the resistor R2 and the resistor R3 in parallel, and the switch K3 is connected with the resistor R4 in parallel.
As shown in fig. 2, by controlling the combination of the switch K1, the switch K2 and the switch K3, loads with different resistances can be set.
Specifically, the method comprises the following steps:
(1) k1 and K2 are closed, and when K3 is opened, the load is R1// R2// R3+ R4;
(2) when K1 is closed and K2 and K3 are opened, the load is R3+ R4;
(3) when K2 is closed and K1 and K3 are opened, the load is R1+ R4;
(4) when K1, K2 and K3 are closed, the load is R1// R2// R3;
(5) when K1, K2 and K3 are disconnected, the load is R1+ R2+ R3+ R4;
therefore, when the discharge control is performed, the load resistance meeting the requirement can be set by controlling different combination modes of K1, K2 and K3 according to the voltage grade and the discharge current parameter, so that the stable discharge according to the discharge current parameter can be ensured when the discharge termination voltage is applied.
Optionally, in some implementations, the preset discharge parameters include, but are not limited to, a voltage level and a discharge current parameter, wherein the discharge current parameter includes, but is not limited to, a set discharge current, a set discharge power.
Further, in some embodiments, the wide range high power discharge device further comprises: and a display device 110 connected to the control device 101 for displaying discharge information of the wide-range high-power discharge device. Alternatively, the display device 110 may include a display including, but not limited to, an LCD display, an LED display, an OLED display, a flexible display, and the like.
In some embodiments, the discharge information comprises: a discharge signal of the battery pack, a resistance value of the discharge load 103, and an operating current of the heat sink 106, and temperature information. The discharge signal of the storage battery pack comprises discharge voltage and discharge current output when the storage battery pack discharges.
Furthermore, the display device 110 can also be used for a user to input operation information or control instructions, so as to achieve the purpose of human-computer interaction.
Referring to fig. 3, fig. 3 is a schematic flow chart of a wide-range high-power discharging method provided by an embodiment of the invention. The method can be realized by the wide-range high-power discharge device disclosed by the embodiment of the invention.
Specifically, as shown in fig. 3, the wide-range high-power discharge method includes:
step S301, receiving a discharge start instruction.
Step S302, acquiring preset discharge parameters according to the discharge starting instruction.
And step S303, starting discharging according to preset discharging parameters.
And step S304, after the discharge is started, obtaining the discharge voltage and the discharge current of the storage battery pack.
Step S305, outputting a feedback signal to the discharge current stabilization system 102 according to the discharge voltage, the discharge current, and the preset discharge parameter.
And S306, adjusting the discharge signal of the storage battery pack by the discharge current stabilization system 102 according to the feedback signal by adopting a preset control algorithm.
In some embodiments, before performing step S303, the method further includes: acquiring initial voltage of a storage battery pack; setting a discharge resistance value of the discharge load 103 according to preset discharge parameters and the initial voltage of the storage battery pack; and judging whether the storage battery meets the discharging condition or not according to the initial voltage, if so, executing the step of starting discharging according to preset discharging parameters.
In some embodiments, the initial voltage of the battery pack comprises: a discharge input voltage and a discharge termination voltage.
Specifically, the setting of the discharge resistance value of the discharge load 103 according to the preset discharge parameter includes: the discharge resistance of the discharge load 103 is selected according to the parameters of the discharge input voltage, the discharge termination voltage, and the discharge current. For example, the discharge input voltage is 240V, the discharge end voltage is 200V, and the discharge current is discharged by constant current 40A, so that the resistance value of 3.6 Ω can be selected. It can be understood that the discharge resistance of the discharge load 103 should not be selected to be smaller, and should follow the condition of meeting the discharge requirement, the larger the resistance is, the better the resistance is, the smaller the discharge current peak value is, the safer the components in the device are.
Further, in some embodiments, the wide-range high-power discharge method further comprises: if the storage battery meets the discharge condition, the heat dissipation device 106 is started; after the heat dissipation device 106 is started, whether the heat dissipation device 106 is abnormal is judged; if not, after the heat sink 106 works normally, discharging is started.
In some embodiments, the adjusting the discharge signal of the battery pack by the discharge current stabilization system 102 according to the feedback signal by using a preset control algorithm includes: and the discharge current stabilization system 102 adjusts the discharge signal of the storage battery pack by adopting an incremental PID control algorithm according to the feedback signal. Optionally, the discharge current stabilizing system 102 may include: the device comprises a PID controller, an IGBT drive circuit and an IGBT module, wherein the PID controller adopts an incremental PID control algorithm to control the IGBT drive circuit so as to adjust a discharge signal of the storage battery pack. Specifically, the control device 101 (which may be a main control board) acquires a real-time discharge detection signal of the storage battery pack when the storage battery pack discharges, and outputs a feedback signal (where the feedback signal includes a real-time discharge voltage and a real-time discharge current of the storage battery pack) to the discharge current stabilizing system 102 according to the real-time discharge detection signal, the PID controller calculates a suitable PWM duty ratio according to the real-time discharge voltage, the real-time discharge current, and the set current, and loads the PWM duty ratio onto the IGBT drive circuit, and the IGBT drive circuit drives the IGBT module, so that the storage battery pack discharges stably in a constant current or constant power manner.
In some embodiments, the wide-range high-power discharge method further comprises: outputting and displaying the discharge information; the discharge information includes: a discharge signal of the battery pack, a resistance value of the discharge load 103, and an operating current of the heat sink 106.
Referring to fig. 4, fig. 4 is a circuit diagram of a wide-range high-power discharge device according to an embodiment of the present invention.
As shown in fig. 4, the control device 101 controls the switch K1, the switch K2, and the switch K3 to achieve the purpose of arbitrarily selecting an appropriate load resistance.
Specifically, as shown in fig. 4, in this embodiment, the resistance R1= the resistance R2 = the resistance R3= the resistance R4 ═ 0.9 Ω; (it should be noted that the resistances of the resistor R1, the resistor R2, the resistor R3, and the resistor R4 are not necessarily equal, and different resistances may be selected according to practical applications).
(1) When K1 and K2 are closed and K3 is opened, the load is R1// R2// R3+ R4=1.2 omega;
(2) when K1 is closed and K2 and K3 are opened, the load is R3+ R4=1.8 omega;
(3) when K2 is closed and K1 and K3 are opened, the load is R1+ R4=1.8 omega;
(4) when K1, K2 and K3 are closed, the load is R1// R2// R3=0.3 omega;
(5) when K1, K2 and K3 are disconnected, the load is R1+ R2+ R3+ R4=3.6 omega;
when the discharge voltage range is 40-60V, the load resistance is selected to be 0.3 omega, and the maximum constant current discharge range can be 40/0.3= 133.3A;
when the discharge voltage range is 60-90V, the load resistance is selected to be 1.2 omega, and the maximum constant current discharge range can be 60/1.2= 50A;
when the discharge voltage range is 90-180V, the load resistance is selected to be 1.8 omega, and the maximum constant current discharge range can be 90/1.8= 50A;
when the discharge voltage range is greater than 180V, the load resistance is selected to be 3.6 Ω, and the maximum constant current discharge range of 180/3.6=50A can be achieved.
In this embodiment, the maximum discharge voltage may be set to 300V (wherein, this may be limited by the withstand voltage of the components, and for example, a component with a higher withstand voltage may be selected to achieve a wider voltage discharge). Optionally, in this embodiment, the settable discharge voltage range is 40 to 300V, the maximum allowable discharge current in the full range is 50A, and is continuously adjustable in the range of 0 to 50A, and when the voltage is 300V, the resistance value of the discharge load 103 cannot be directly selected to be 0.3 Ω, in this case, although the effective value of the current is 50A, the peak value of the current is 300/0.3=1000A, which exceeds the normal operating range of the component, so a large resistance gear must be selected; if the discharge range is not the full range, the current discharge in a larger range can be realized, for example, when the discharge voltage is 40-60V, the discharge with the continuous adjustable voltage of 0-133A can be realized; therefore, in the embodiment, wide-range high-power discharge of 40-300V, 0-50A (the partial discharge range can realize a wider range) is realized.
According to the embodiment of the invention, the switch is controlled to be switched on and off according to the voltage and discharge current parameters, and the proper discharge load 103 is selected to realize wide-range high-power discharge. And an incremental PID control algorithm is adopted to realize the quick constant current or constant power of the discharging device.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (14)
1. A wide range high power discharge device comprising: the device comprises a storage battery pack, a control device, a discharge detection module, a discharge load and a discharge current stabilizing system;
the storage battery pack is used for outputting a discharge signal during discharge;
the discharge detection module is used for detecting a discharge signal of the storage battery pack and outputting the discharge detection signal to the control device when the storage battery pack discharges;
the control device is used for setting a discharge resistance value of the discharge load according to the initial voltage of the storage battery pack and preset discharge parameters before the storage battery pack discharges, and outputting a feedback signal to the discharge current stabilizing system according to the discharge detection signal when the storage battery pack discharges;
and the discharge current stabilization system is used for adjusting a discharge signal of the storage battery pack by adopting a preset control algorithm according to the feedback signal.
2. The wide-range high power discharge device of claim 1, wherein the discharge detection module comprises: a battery voltage detection circuit;
the storage battery voltage detection circuit is used for detecting the initial voltage of a storage battery pack and the discharge voltage of the storage battery pack when the storage battery pack discharges, and sending the initial voltage and the discharge voltage to the control device.
3. The wide-range high power discharge device of claim 2, wherein the discharge detection module further comprises: a battery current detection circuit;
the storage battery current detection circuit is used for detecting the discharge current of the storage battery pack in the discharge process of the storage battery pack and sending the discharge current to the control device.
4. The wide range high power discharge device of claim 1, further comprising: and the heat dissipation device is connected with the control device and is used for cooling the storage battery pack in the discharging process of the storage battery pack.
5. The wide range high power discharge device of claim 4, further comprising: and the heat dissipation detection circuit is connected with the control device, detects the working current of the heat dissipation device in the working process of the heat dissipation device and sends the working current to the control device.
6. The wide range high power discharge device of claim 1, further comprising: and the temperature detection device is connected with the control device and is used for detecting the temperature of the wide-range high-power discharge device.
7. The wide range high power discharge device of claim 6, further comprising: and the main switch is connected with the temperature detection device and used for cutting off the power supply according to the control of the temperature detection device.
8. The wide range high power discharge device of any one of claims 1 to 7, wherein the discharge load comprises: a plurality of series resistors and a plurality of switches;
each of the plurality of switches is disposed in parallel with one or more of the plurality of series resistors.
9. The wide range high power discharge device of claim 8, further comprising: and the display device is connected with the control device and is used for displaying the discharge information of the wide-range high-power discharge device.
10. A method for wide-range high power discharge, comprising:
receiving a discharge starting instruction;
acquiring a preset discharge parameter according to the discharge starting instruction;
starting discharge according to the preset discharge parameters;
after starting discharge, acquiring discharge voltage and discharge current of the storage battery pack;
outputting a feedback signal to a discharge current stabilization system according to the discharge voltage, the discharge current and the preset discharge parameter;
and the discharge current stabilization system adjusts the discharge signal of the storage battery pack according to the feedback signal by adopting a preset control algorithm.
11. The wide-range high power discharge method of claim 10, wherein said initiating discharge according to said preset discharge parameters is preceded by:
acquiring the initial voltage of the storage battery pack;
setting a discharge resistance value of a discharge load according to the preset discharge parameters and the initial voltage of the storage battery pack;
and judging whether the storage battery meets a discharging condition or not according to the initial voltage, if so, executing a step of starting discharging according to the preset discharging parameters.
12. The wide range high power discharge method of claim 11, further comprising:
if the storage battery meets the discharge condition, starting a heat dissipation device;
after the heat dissipation device is started, judging whether the heat dissipation device is abnormal or not;
if not, after the heat dissipation device works normally, discharging is started.
13. The wide-range high-power discharging method according to claim 10, wherein the adjusting of the discharging signal of the storage battery pack by the discharging current stabilizing system according to the feedback signal by using a preset control algorithm comprises:
and the discharge current stabilization system adjusts the discharge signal of the storage battery pack by adopting an incremental PID control algorithm according to the feedback signal.
14. The wide range high power discharge method of claim 10, further comprising:
outputting and displaying the discharge information; the discharge information includes: the discharge signal of the storage battery pack, the resistance value of a discharge load and the working current of the heat dissipation device.
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