CN112305425A - Method and device for detecting temperature compensation voltage of charger - Google Patents
Method and device for detecting temperature compensation voltage of charger Download PDFInfo
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- CN112305425A CN112305425A CN202011065489.2A CN202011065489A CN112305425A CN 112305425 A CN112305425 A CN 112305425A CN 202011065489 A CN202011065489 A CN 202011065489A CN 112305425 A CN112305425 A CN 112305425A
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000012360 testing method Methods 0.000 claims abstract description 38
- 238000007600 charging Methods 0.000 claims description 30
- 238000001514 detection method Methods 0.000 claims description 27
- 239000004744 fabric Substances 0.000 claims description 17
- 238000009413 insulation Methods 0.000 claims description 13
- 230000000903 blocking effect Effects 0.000 claims description 11
- 230000008602 contraction Effects 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 description 12
- 230000001276 controlling effect Effects 0.000 description 5
- 230000006978 adaptation Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 206010028347 Muscle twitching Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010277 constant-current charging Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/378—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] specially adapted for the type of battery or accumulator
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a method and a device for detecting temperature compensation voltage of a charger. The problem that the temperature compensation value of the charger at each temperature cannot be rapidly detected in the prior art is solved; the invention comprises the following steps: s1: putting the charger into a box body of a high-low temperature test box to complete connection with a direct-current stabilized voltage power supply and a direct-current electronic load; s2: setting the temperature in the high-low temperature test box body to reach a specified temperature; s3: the DC stabilized voltage supply outputs rated voltage, adjusts the voltage mode and the current mode of the DC electronic load, and simulates the current, voltage and resistance states of the battery before the lamp turning stage of the charger; s4: and obtaining the highest voltage value in the current mode, and subtracting the obtained voltage value from the maximum voltage value at 25 ℃ to obtain a temperature compensation value at the specified temperature. Each temperature environment can be simulated through the high-low temperature test box, and the temperature compensation value of the charger is detected at each temperature through the quick acquisition of the parameters for setting the electronic load.
Description
Technical Field
The invention relates to the field of charger temperature compensation detection, in particular to a method and a device for detecting charger temperature compensation voltage.
Background
In the process of charging and discharging the lead-acid storage battery, temperature factors play a role in directly influencing charging and discharging capacity. Typically, the cell voltage will drop by 4mV for every 1 deg.C rise in temperature, and the cell voltage will rise by 4mV for every 1 deg.C fall in temperature. Therefore, if the charger corresponding to the lead-acid storage battery is not provided with a temperature compensation value, the storage battery is overcharged in a high-temperature environment, and the phenomenon of insufficient charging is caused in a low-temperature environment.
At present, the number of chargers of lead-acid storage batteries with temperature compensation functions in the market is increasing, and a plurality of testing devices for the chargers exist, but no clear detecting device is provided for detecting the temperature compensation value of the charger. For example, a "charger testing device" disclosed in chinese patent literature, publication No. CN205080244U, includes a power module, a load module, a measurement module, a control module, and a temperature compensation testing module. The power supply module provides an input power supply for the charger to be tested. The load module provides a resistance load for the charger to be tested. The measuring module measures and displays the voltage and current values of the alternating current power supply input by the charger to be measured, measures and displays the direct current voltage and current values output by the charger to be measured, and measures and displays the temperature of the radiating fins of the charger to be measured. The control module adjusts the output voltage value of the power supply module and the resistance value of the load module and controls the short-circuit protection test switch (K1).
The scheme does not detect the temperature compensation value of the charger at each temperature, can detect whether the charger has the temperature compensation function or not and detect whether the temperature compensation value meets the production requirement of the product or not.
At present, charger temperature compensation detection is coupled with a charger and is used for monitoring in real time in the charging process, but the time of a general complete charging flow is long, the temperature compensation value of the charger cannot be obtained quickly, and the detection speed is slow.
Disclosure of Invention
The invention mainly solves the problem that the prior art can not quickly detect the temperature compensation value of the charger at each temperature; the method and the device for detecting the temperature compensation voltage of the charger can simulate various temperature environments through a high-low temperature test box, and quickly obtain the temperature compensation value of the charger detected at various temperatures through setting parameters of an electronic load.
The technical problem of the invention is mainly solved by the following technical scheme:
a detection method for temperature compensation voltage of a charger comprises the following steps:
s1: putting the charger into a box body of a high-low temperature test box to complete connection with a direct-current stabilized voltage power supply and a direct-current electronic load;
s2: setting the temperature in the high-low temperature test box body to reach a specified temperature through a temperature control panel;
s3: the DC stabilized voltage supply outputs rated voltage, adjusts the voltage mode and the current mode of the running program of the DC electronic load, and simulates the current, voltage and resistance states of the battery before the lamp turning stage of the charger;
s4: starting a direct current electronic load program, obtaining the highest voltage value in a current mode, and subtracting the obtained voltage value from the maximum voltage value at 25 ℃ to obtain a temperature compensation value at the specified temperature.
The high-low temperature test box can simulate various temperature environments, the electronic load can simulate the battery charging state jump critical state by setting the parameters of the electronic load, the maximum voltage when the charging state jumps is taken as the charging voltage at the temperature, the maximum voltage value obtained by subtracting the maximum voltage value at the normal temperature of 25 ℃ from the maximum voltage value is taken as the temperature compensation value at the temperature, the temperature compensation value of the detection charger at various temperatures can be quickly obtained, and the waiting for a complete and long charging process is not needed.
Preferably, the step S1 includes the following steps:
s11: putting the charger into a box body of a high-low temperature test box;
s12: an input line and an output line of the charger penetrate through the line channel and are respectively inserted into an input socket and an output socket which are arranged on the outer side wall of the box body;
s13: and completing the complete connection of the circuit of the charger and closing the box door.
The circuit connection is ensured to be correct, the electronic load is used for replacing a real battery, the maximum voltage value under the set temperature is quickly obtained, and the temperature compensation value is conveniently and quickly obtained.
Preferably, the charger is placed on a shelf in the box body, and the aperture of the opening of the line channel is reduced by the contraction device after the input line and the output line of the charger pass through the line channel.
The charger is placed on the supporter, guarantees that ambient temperature is even, avoids the sensor of the detection temperature of charger to contact high low temperature test box and influence the precision of experimental data. The opening is reduced to avoid the temperature in the high-low temperature test box from being influenced by the external environment.
Preferably, the step S3 includes the following steps:
s31: rotating a voltage knob of the direct current stabilized power supply to the rated voltage of the charger;
s32: setting a voltage mode and voltage mode time of the direct current electronic load, setting the voltage of the direct current electronic load to be rated output voltage-highest voltage, and setting a detection value to be the maximum current of the charger;
s33: setting a current mode and a current mode time of the direct current electronic load, setting the current of the direct current electronic load as rated output current-0, and setting a detection value as the maximum voltage of the charger.
The voltage mode detects a current at the time of charging, and the current mode detects a maximum voltage at the time of charging.
Preferably, when the charger is a charger for road vehicles, the voltage mode sequentially comprises a pre-charging stage, a first constant current stage and a second constant current stage; the current values of the respective stages are detected.
And detecting current values of the road vehicle charger in various charging states.
A detection device for temperature compensation voltage of a charger comprises a high-low temperature test box, a voltage-stabilized power supply module and an electronic load module; the high-low temperature test box comprises a box body and a temperature control panel, wherein the box body can generate high and low temperatures, the temperature control panel is arranged on one side of the box body, a line channel is arranged on the other side of the box body, and an input socket and an output socket are arranged on the same side of the box body, which is provided with the line channel; the input socket is electrically connected with the voltage-stabilized power supply module, and the output socket is electrically connected with the electronic load module.
The charger to be detected is placed in a box body of the high-low temperature test box, the temperature in the box body is controlled through the temperature control panel, an input line and an output line of the charger extend out of the box body through a line channel, the input of the charger is connected with the voltage-stabilized power supply module through the input socket, and the output of the charger is connected with the electronic load module through the output socket. The actual condition of the load in the charging process is simulated by setting the resistance, the voltage and the current value of the electronic load module, the highest voltage of the charger at the current temperature is obtained, and the highest voltage is subtracted from the maximum voltage detected at the normal temperature of 25 ℃, so that the temperature compensation value at the temperature is obtained. The temperature in the adjusting box body can detect the temperature compensation value of the charger at different temperatures, and is used for detecting whether the charger has the function of temperature compensation or not and whether the temperature compensation value of the charger meets the production requirement of products or not.
Preferably, the input socket includes a three-pin socket and a two-pin socket. Because the types of the chargers are different, the plugs of the input lines of the chargers are different, the plugs of two pins or three pins are provided, and the input socket is matched with the input line plugs of the chargers of different types.
Preferably, the output socket comprises a three-socket and two wiring poles which are universal for the electric moped; the wiring pole is respectively connected with the anode and the cathode of the electronic load module. Because the difference of charger model divide into socket and the automobile-used socket of road for the moped, the socket of three sockets is used to the moped charger, and the output line connection of road car charger uses the nut to fix on the utmost point post at socket both ends. The charger is suitable for various types of chargers.
Preferably, the stabilized voltage supply module is arranged on one side of the box body of the high-low temperature test box and comprises a direct-current stabilized voltage supply, a voltage adjusting knob, a current adjusting knob and a power supply display screen; the voltage adjusting knob and the current adjusting knob are connected with a direct current stabilized power supply through a PWM adjusting circuit, and the power supply display screen is electrically connected with the direct current stabilized power supply. The voltage adjusting knob is rotated to set the value of the open-circuit voltage, and the current adjusting knob is rotated to set the given current value. The output of the direct current stabilized power supply is regulated through the PWM regulating circuit, and the power supply display screen is used for displaying the voltage value and the current value output by the direct current stabilized power supply.
Preferably, the electronic load module comprises a direct current electronic load, an operation display screen and an electronic load switch; the direct current electronic load is respectively and electrically connected with the operation display screen and the electronic load switch. Parameters such as direct current electronic load current, voltage, resistance and the like are adjusted through operating the display screen, so that the battery is simulated to detect the parameters of the charger. Through setting the parameters of the electronic load module, the direct current electronic load is at the critical point of the change of the charging state, the temperature compensation value at the temperature can be quickly obtained, and the temperature compensation value does not need to be slowly waited.
Preferably, the opening of the wire channel is provided with a contraction device capable of reducing the aperture of the opening. Because the charger output and input lines are of different sizes than the plug, the line channel design needs to be sized to pass through the largest plug. In the use, the bore of line passageway is greater than the diameter of input line and output line far away, and external environment temperature can influence the inside temperature of box, and the constriction device of design bore stretches out the external back shrink bore of box at the plug for the bore of open-ended bore adaptation input line and output line reduces the influence of external environment temperature to the inside temperature of box.
Preferably, the retractor comprises a blocking sheet, one end of the blocking sheet is hinged to one side of the opening, and an arc-shaped opening matched with the charger circuit is formed in the side face of the blocking sheet. The aperture of the line channel is reduced by rotating the baffle plate.
Preferably, the shrinking device comprises a thermal insulation cloth and the strips, the thermal insulation cloth is in a cylindrical shape with the diameter matched with the aperture of the opening of the line channel, the opening at one end of the thermal insulation cloth is fixedly connected with the line channel, and the strip channel for accommodating the strips is sewn at the opening at the other end of the thermal insulation cloth. Through twitching the stripping, shrink the one end opening of thermal-insulated cloth for the size adaptation output line of the opening size of thermal-insulated cloth and the size of input line.
Preferably, the box body is provided with a door with a glass observation window, and the top end in the box body is provided with an inner lamp. The charging state of the charger in the box body can be observed through the glass observation window, and the inner lamp is arranged for illumination, so that the observation is clear.
The invention has the beneficial effects that:
by setting the parameters of the electronic load, the simulation battery is in a critical state in the charging stage, and the maximum voltage of the charger in the lamp-turning state is quickly obtained, so that the temperature compensation value of the charger at the temperature is quickly obtained, and the detection efficiency is improved.
Drawings
Fig. 1 is a schematic structural diagram of a charger temperature compensation voltage detection device according to the present invention.
Fig. 2 is a front view of a charger temperature compensation voltage detection apparatus of the present invention.
Fig. 3 is a schematic structural diagram of a retractor according to a second embodiment of the present invention.
In the figure, 1, a box body, 2, a temperature control panel, 21, a temperature display control screen, 22, a high and low temperature test box switch, 23, an inner lamp switch, 3, a voltage stabilizing power supply module, 31, a voltage adjusting knob, 32, a current adjusting knob, 33, a power supply display screen, 4, an electronic load module, 41, an operation display screen, 42, an electronic load switch, 5, a line channel, 6, an input socket, 61, a three-pin socket, 62, a two-pin socket, 7, an output socket, 71, a three-pin socket, 72, a wiring pole, 8, a contraction device, 81, heat insulation cloth, 82, a drawing strip and 9, an observation window are arranged.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
The first embodiment is as follows:
the detection device for the temperature compensation voltage of the charger of the embodiment comprises a high-low temperature test box, a regulated power supply module 3 and an electronic load module 4 which are arranged in a shell as shown in fig. 1 and fig. 2.
The high and low temperature test chamber comprises a chamber body 1 capable of generating high and low temperatures and a temperature control panel 2. The temperature control panel 2 is provided at one side of the cabinet 1.
The box body 1 is provided with a door with a glass observation window 9, a magnetic sealing strip is arranged between the door and the box body 1, a semiconductor element capable of refrigerating or refrigerating is arranged in the box body 1 through adsorption of the magnetic sealing strip, and an inner lamp is arranged at the top in the box body 1. The user can observe the charging state of the charging device in the box body 1 through the glass observation window 9, and the inner lamp is arranged for illumination, so that the user can clearly observe the state of the charger in the box body 1.
The temperature control panel 2 is disposed above the left side of the cabinet 1. The temperature control panel 2 comprises a temperature display control screen 21, a high-low temperature test chamber switch 22 and an inner lamp switch 23. The temperature display control screen 21 is electrically connected with the semiconductor in the box body 1, and is used for controlling the semiconductor in the box body 1 to refrigerate or heat, controlling the temperature in the box body 1 and displaying on the screen. The high-low temperature test chamber switch 22 is used for controlling whether the chamber body is started or not, and the inner lamp switch 22 is used for controlling the opening and closing of the inner lamp in the chamber body 1.
The other side of the box body 1, namely the right side in the figure, is provided with a line channel 5, and an input socket 6 and an output socket 7 are arranged at the same side of the box body 1, which is provided with the line channel 5. The input socket 6 is electrically connected to the regulated power supply module 3, and the output socket 7 is electrically connected to the electronic load module 4.
The input socket 6 includes a three-pin socket 61 and a two-pin socket 62. Because the types of the chargers are different, the input lines of the chargers are different in plug, the input socket 6 is provided with a two-pin plug or a three-pin plug, and the input socket is matched with the input line plugs of the chargers of different types.
The output socket 7 includes a three-socket 71 and two terminal posts 72 for electric power assisted vehicles. The terminal posts 72 are connected to the positive and negative electrodes of the electronic load module 4, respectively. Because the difference of charger model divide into socket and the automobile-used socket of road for the moped, the socket of three sockets is used to the moped charger, and the output line connection socket both ends of road car charger uses the nut to fix on the wiring utmost point post, can the charger of each model of adaptation.
The opening of the wire passage 5 is provided with a constriction device 8 capable of reducing the aperture of the opening. The retractor device 8 comprises a blocking sheet, in this embodiment, the blocking sheet is a semicircular blocking sheet, one end of the blocking sheet is hinged to one side of the opening of the line channel 5, and an arc-shaped opening adapted to the line of the charger is arranged on the side surface of the blocking sheet. The aperture of the line channel is reduced by rotating the baffle plate.
Because the charger output and input lines are of different sizes than the plug, the line channel design needs to be sized to pass through the largest plug. In the use, the bore of line passageway 5 is greater than the diameter of input line and output line far away, and external environment temperature can influence the inside temperature of box, and the constriction device 8 of design bore stretches out the external back constriction bore of box at the plug for the bore of open-ended bore adaptation input line and output line reduces the influence of external environment temperature to the inside temperature of box.
The regulated power supply module 3 is arranged on one side of the high-low temperature test box body, and in the embodiment, the regulated power supply module 3 is arranged in the middle of the left side of the box body 1. The regulated power supply module 3 comprises a direct current regulated power supply, a voltage adjusting knob 31, a current adjusting knob 32 and a power supply display screen 33.
The voltage adjusting knob 31 and the current adjusting knob 32 are connected with a DC stabilized power supply through a PWM adjusting circuit, and the power display screen 33 is electrically connected with the DC stabilized power supply.
The magnitude of the open circuit voltage value is set by rotation of the voltage adjustment knob 31, and a predetermined current value is set by rotation of the current adjustment knob 32. The output of the dc regulated power supply is regulated by the PWM regulating circuit, and the power supply display 33 is used to display the voltage value and the current value output by the dc regulated power supply.
The electronic load module 4 includes a dc electronic load, an operation display 41, and an electronic load switch 42.
The dc electronic load is electrically connected to the operation display 41 and the electronic load switch 42, respectively. Parameters such as direct current electronic load current, voltage, resistance and the like are adjusted through the touch type operation display screen 41, so that the parameters of the charger are detected by the simulated battery. The electronic load switch 42 is used for controlling the on and off of the dc electronic load. Through setting the parameters of the electronic load module 4, the direct current electronic load is at the critical point of the change of the charging state, the temperature compensation value at the temperature can be quickly obtained, and the change of the voltage value does not need to be slowly waited.
A detection method for temperature compensation voltage of a charger comprises the following steps:
s1: and putting the charger into a box body of the high-low temperature test box to finish the connection with the direct-current stabilized voltage power supply and the direct-current electronic load.
S11: and putting the charger into a box body of the high-low temperature test box.
S12: the input line and the output line of the charger penetrate through the line channel and are respectively inserted into the input socket and the output socket which are arranged on the outer side wall of the box body.
The charger is placed on a storage rack in the box body, and the aperture of an opening of the line channel is reduced by the aid of the contraction device after the input line and the output line of the charger penetrate through the line channel. The charger is placed on the supporter, guarantees that ambient temperature is even, avoids the sensor of the detection temperature of charger to contact high low temperature test box and influence the precision of experimental data. The opening is reduced to avoid the temperature in the high-low temperature test box from being influenced by the external environment.
S13: and completing the complete connection of the circuit of the charger and closing the box door.
The circuit connection is ensured to be correct, the electronic load is used for replacing a real battery, the maximum voltage value under the set temperature is quickly obtained, and the temperature compensation value is conveniently and quickly obtained.
S2: the temperature in the high-low temperature test box body is set to reach the designated temperature through the temperature control panel.
And (4) turning on the direct current electronic load and the direct current stabilized voltage power supply, and preheating the equipment for 5-10 min.
S3: the DC stabilized voltage supply outputs rated voltage, adjusts the voltage mode and the current mode of the running program of the DC electronic load, and simulates the current, the voltage and the resistance state of the battery before the lamp turning stage of the charger.
S31: and rotating a voltage knob of the direct current stabilized power supply to the rated voltage of the charger. The display voltage of the DC stabilized power supply is adjusted to 1.75V/cell.
S32: setting a voltage mode and voltage mode time of the direct current electronic load, setting the voltage of the direct current electronic load to be rated output voltage-highest voltage, and setting a detection value to be the maximum current of the charger.
When the charger is a charger for a power assisted vehicle, an initial voltage (1.75V/cell) and a cut-off voltage (2.45V/cell) are set, and the operating time is set. The detection value is the maximum current of the charger.
When the charger is used for a power-assisted vehicle and the charger is used for a road vehicle, the voltage mode sequentially comprises a pre-charging stage, a first constant current stage and a second constant current stage; the current values of the respective stages are detected.
And a pre-charging stage for detecting whether the charger has the stage and the current value of the stage. The operating mode is selected as CV (voltage), the set value is 20.0V-24.0V, and the measurement item is set as C (current).
The first constant current stage detects the current value of the stage. The operating mode is selected as CV (voltage), the set value is 24.0V-28.8V, and the measurement item is set as C (current).
And the second constant current stage is used for detecting the current value of the stage. The operating mode is selected as CV (voltage), the set value is 28.8V-29.4V, and the measurement item is set as C (current).
S33: setting a current mode and a current mode time of the direct current electronic load, setting the current of the direct current electronic load as rated output current-0, and setting a detection value as the maximum voltage of the charger.
When the charger is a charger for a power assist vehicle, the initial current (3A) and the cutoff current (0A) are set, and the operating time is set. The detection value is the maximum voltage of the charger.
When the charger is used for a power-assisted vehicle, the lamp-turning current and the highest voltage value in the constant-voltage constant-current stage are obtained by setting the resistance value. The resistance value is the highest voltage value of the second constant current charging stage divided by the current change value of the constant current and constant voltage stage.
The initial resistance value is the initial value of the voltage of the constant-current and constant-voltage stage divided by the charging parameter of the charger and the limiting current of the constant-current and constant-voltage stage in the curve; the termination resistance is the voltage of the constant current and constant voltage stage divided by the charging parameter of the charger and the minimum value of the limiting current of the constant current and constant voltage stage in the curve, and then multiplied by the amplification factor. In the present embodiment, the amplification factor is 110%.
S4: starting a direct current electronic load program, obtaining the highest voltage value in a current mode, and subtracting the obtained voltage value from the maximum voltage value at 25 ℃ to obtain a temperature compensation value at the specified temperature.
The high-low temperature test box can simulate various temperature environments, the electronic load can simulate the battery charging state jump critical state by setting the parameters of the electronic load, the maximum voltage when the charging state jumps is taken as the charging voltage at the temperature, the maximum voltage value obtained by subtracting the maximum voltage value at the normal temperature of 25 ℃ from the maximum voltage value is taken as the temperature compensation value at the temperature, the temperature compensation value of the detection charger at various temperatures can be quickly obtained, and the waiting for a complete and long charging process is not needed.
The detection device of the charger temperature compensation voltage of the embodiment puts the charger to be detected into the box body 1 of the high-low temperature test box, controls the temperature in the box body 1 through the temperature control panel 2, and extends the input line and the output line of the charger out of the box body through the line channel 5, the input line of the charger is connected with the stabilized voltage power supply module 3 through the input socket 6, and the output line of the charger is connected with the electronic load module 4 through the output socket 7.
The actual condition of the load in the charging process is simulated by setting the resistance, the voltage and the current value of the electronic load module 4, the highest voltage of the charger at the current temperature is obtained, and the highest voltage is subtracted from the maximum voltage detected at the normal temperature of 25 ℃, so that the temperature compensation value at the temperature is obtained. The temperature in the box body 1 is adjusted, the temperature compensation value of the charger at different temperatures can be detected, whether the charger has the temperature compensation function or not is detected, and whether the temperature compensation value of the charger meets the production requirement of a product or not is detected.
Example two:
a detection device for temperature compensation voltage of a charger comprises a high-low temperature test chamber, a stabilized voltage power supply module 3 and an electronic load module 4 which are arranged in a shell. The high and low temperature test chamber comprises a chamber body 1 capable of generating high and low temperatures and a temperature control panel 2. A line channel 5 is arranged on one side of the box body 1, and a contraction device 8 is arranged at the opening of the line channel 5.
As shown in fig. 3, the shrinking device 8 includes a thermal insulation cloth 81 and strips 82, the thermal insulation cloth 81 is a cylinder with a diameter adapted to the opening caliber of the circuit channel 5, one end opening of the thermal insulation cloth 81 is fixedly connected with the circuit channel 5, and the other end opening of the thermal insulation cloth 81 is sewn with the strip channel for accommodating the strips 82. By pulling the slider 82, one end of the thermal cloth 84 is contracted to be opened, so that the size of the opening of the thermal cloth 81 is adapted to the sizes of the output line and the input line. Is convenient to use.
The embodiment is only changed for the contraction device 8, and the other arrangements are the same as the first embodiment.
It should be understood that the examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Claims (9)
1. A detection method for temperature compensation voltage of a charger is characterized by comprising the following steps:
s1: putting the charger into a box body of a high-low temperature test box to complete connection with a direct-current stabilized voltage power supply and a direct-current electronic load;
s2: setting the temperature in the high-low temperature test box body to reach a specified temperature through a temperature control panel;
s3: the DC stabilized voltage supply outputs rated voltage, adjusts the voltage mode and the current mode of the running program of the DC electronic load, and simulates the current, voltage and resistance states of the battery before the lamp turning stage of the charger;
s4: starting a direct current electronic load program, obtaining the highest voltage value in a current mode, and subtracting the obtained voltage value from the maximum voltage value at 25 ℃ to obtain a temperature compensation value at the specified temperature.
2. The method as claimed in claim 1, wherein the step S1 includes the steps of:
s11: putting the charger into a box body of a high-low temperature test box;
s12: an input line and an output line of the charger penetrate through the line channel and are respectively inserted into an input socket and an output socket which are arranged on the outer side wall of the box body;
s13: and completing the complete connection of the circuit of the charger and closing the box door.
3. The method as claimed in claim 2, wherein the charger is placed on a shelf in the housing, and the input line and the output line of the charger pass through the wire channel and then reduce the aperture of the wire channel opening by the constriction device.
4. The method as claimed in claim 1, wherein the step S3 includes the steps of:
s31: rotating a voltage knob of the direct current stabilized power supply to the rated voltage of the charger;
s32: setting a voltage mode and voltage mode time of the direct current electronic load, setting the voltage of the direct current electronic load to be rated output voltage-highest voltage, and setting a detection value to be the maximum current of the charger;
s33: setting a current mode and a current mode time of the direct current electronic load, setting the current of the direct current electronic load as rated output current-0, and setting a detection value as the maximum voltage of the charger.
5. The method for detecting the temperature compensation voltage of the charger according to claim 1 or 4, wherein when the charger is a road vehicle charger, the voltage mode sequentially comprises a pre-charging stage, a first constant current stage and a second constant current stage; the current values of the respective stages are detected.
6. A charger temperature compensation voltage detection device is applied to the charger temperature compensation voltage detection method of any one of claims 1-5, and is characterized by comprising a high-low temperature test chamber, a voltage-stabilized power supply module (3) and an electronic load module (4); the high-low temperature test box comprises a box body (1) and a temperature control panel (2), wherein the box body can generate high and low temperatures, the temperature control panel is arranged on one side of the box body, a line channel (5) is arranged on the other side of the box body, and an input socket (6) and an output socket (7) are arranged on the same side of the box body, which is provided with the line channel; the opening of the line channel is provided with a contraction device (8) capable of reducing the caliber of the opening; the input socket is electrically connected with the voltage-stabilized power supply module, and the output socket is electrically connected with the electronic load module.
7. The device for detecting the temperature-compensated voltage of a charger according to claim 6, wherein the input socket (6) comprises a three-pin socket (61) and a two-pin socket (62); the output socket (7) comprises a three-jack socket (71) and two wiring poles (72) which are universal for the electric moped; the wiring pole is respectively connected with the anode and the cathode of the electronic load module (4).
8. The device for detecting the temperature-compensated voltage of a charger according to claim 6, wherein the contracting device (8) comprises a blocking piece, one end of the blocking piece is hinged on one side of the opening of the circuit channel (5), and the side surface of the blocking piece is provided with an arc-shaped opening adapted to the circuit of the charger.
9. The device for detecting the temperature-compensated voltage of a charger according to claim 6, wherein the shrinking device (8) comprises a thermal insulation cloth and strips, the thermal insulation cloth is cylindrical with a diameter adapted to the aperture of the opening of the circuit channel (5), the opening of one end of the thermal insulation cloth is fixedly connected with the circuit channel, and the strip channel for accommodating the strips is sewn at the opening of the other end of the thermal insulation cloth.
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