CN111103480A

CN111103480A - Device and method for rapidly detecting charging parameters of charger

Info

Publication number: CN111103480A
Application number: CN201911250909.1A
Authority: CN
Inventors: 余杰; 钱欢; 彭超; 张学锋; 杨兴丰
Original assignee: Chaowei Power Group Co Ltd
Current assignee: Chaowei Power Group Co Ltd
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2020-05-05

Abstract

The invention relates to a device for rapidly detecting charging parameters of a charger, which comprises a direct-current power supply, a direct-current electronic load and a current-limiting resistor. The device for rapidly detecting the charging parameters of the charger has the advantages of high detection speed and high efficiency. The invention also provides a charging method of the device for rapidly detecting the charging parameters of the charger.

Description

Device and method for rapidly detecting charging parameters of charger

Technical Field

The invention relates to the field of chargers.

Background

Because of the low cost, low maintenance, convenient use and the like of the electric moped, the usage amount of the electric moped is continuously increased, the scale of a corresponding storage battery factory is also continuously enlarged, and the goods returning amount of the storage battery is increased day by day. There are many reasons for the return of the battery, one of which is the instability of the performance of the charger. At present, various types of chargers of different brands in the market are too numerous and have different qualities, and the reason for judging the goods return of the user battery is that the chargers only detect the parameters of the user charger at the time of the goods return.

The current method for detecting the parameters of the charger is to use a data recorder, namely, a current line of the data recorder is connected with a storage battery in series to detect charging current, and a voltage line is connected with a positive electrode and a negative electrode of the storage battery to detect battery voltage. The method is operated according to the program set by the charger, the detection time is generally 10-12 h, the period is long, the operation is complex, data needs to be exported and processed, and the method is not suitable for field operation of agents. It becomes necessary how to read the charging parameters of the charger quickly.

Disclosure of Invention

In order to solve the technical problem, the invention provides a device for rapidly detecting charging parameters of a charger, which comprises a direct current power supply, a direct current electronic load and a current limiting resistor, and is characterized in that the direct current power supply is connected with the current limiting resistor in series and then connected with the direct current electronic load in parallel, and a program selection button is arranged on the direct current electronic load.

Further, the program selection buttons include at least one program selection button.

Furthermore, the program selection button has different positions, and different charging programs are correspondingly called at different positions

The invention also provides a charging method of the device for rapidly detecting the charging parameters of the charger.

The device for rapidly detecting the charging parameters of the charger has the advantages of high detection speed and high efficiency.

Drawings

FIG. 1 is a schematic diagram of an apparatus for rapidly detecting charging parameters of a charger according to the present invention;

FIG. 2 is a three-stage charging method curve diagram of the electric bicycle charger of the present invention;

FIG. 3 is a program layout diagram of various types of chargers for electrically assisted vehicles according to the present invention;

FIG. 4 is a graph of a multi-stage voltage-varying intermittent charging method of the electric road vehicle charger of the present invention;

fig. 5 is a program setting diagram of each model of the electric road vehicle charger of the invention.

Detailed Description

The invention is further described with reference to the following figures and specific embodiments.

As shown in fig. 1, a device 10 for rapidly detecting charging parameters of a charger according to the present invention includes a dc power supply 1, a dc electronic load 2, and a current limiting resistor 4, wherein the dc power supply 1 is connected in series with the current limiting resistor 4, then connected in parallel with the dc electronic load 2, and connected in parallel with the charger 3 when detecting the charger parameters. The direct current electronic load 2 is provided with a program selection button 5, a user can select a charging program of the direct current electronic load 2 according to needs through the program selection button 5, the program selection button 5 can also be provided with a plurality of corresponding different programs, and different charging programs can also be called correspondingly through converting different positions. The direct current power supply 1 provides a specified open circuit voltage (low voltage) for the charger to simulate the initial state of the battery; the current-limiting resistor 4 is connected in series with the direct current power supply 1, and the voltage provided by the direct current power supply 1 in series is used for activating the charger and playing a role in voltage division protection; the direct current electronic load 2 simulates the battery characteristics, controls the whole charging process by artificially setting a specific charging program, and detects related parameters of the charger. The test process and the direct current electronic load setting are all set by programming, the whole process is automatically completed, and detailed data are recorded.

The charger can be divided into an electric moped charger and an electric road vehicle charger according to different types of corresponding batteries of the charger.

Electric bicycle (DZF series battery) charger charging parameter detection (partial EVF series battery, such as 6-EVF-32/38/45, etc. all adopt the method)

At present, most of the chargers for moped in the market (e.g. fast donkey, kopeng, velcade, yadi, special and other charger manufacturers) use a three-stage charging method, as shown in fig. 2, and the three-stage charging mode mainly needs to measure the "maximum current", "maximum voltage", "lamp turning current" and "float charging voltage" of the charger.

After the devices are connected according to fig. 1, the program selection button 5 is set in the charging program mode of fig. 2, and the display screen displays the relevant setting parameters and testing parameters, and the specific operation steps and program setting rules are as follows (taking a 48V20Ah charger as an example): the first step is as follows: the charger is connected and the direct current power supply is switched on, and the voltage of the direct current power supply 1 is adjusted to 48V. The step is that the switching power supply provides initial voltage for activating the charger; the second step is that: the procedure of turning on the dc electronic load 4. The program sets up two phases: the set value of the first stage is set to CV (voltage) mode, the value is 48V-58.8V, and the test value is set to CC (current) mode. In the first stage, the voltage value is increased from the initial value to the maximum value through the parameter setting of the direct current electronic load, and the maximum current of the charger in the S1 stage is tested; the set value of the second stage is set to be in a CC (current) mode, the value is 3A-0A, and the test value is in a CV (voltage) mode. The second phase enters the charging phase of S2, the current is decreased from high to low, and the voltage is kept high until the current is decreased to the lamp-turning current, so as to jump to the phase of S3. This step measures the highest voltage at stage S2, the lamp current, and the float voltage at stage S3.

The basic parameters of the charger, namely 'maximum current', 'highest voltage', 'lamp-turning current' and 'floating charge voltage', can be obtained through the above steps, and whether the charger is qualified or not or whether the charger is suitable for the storage battery used by a user can be judged by contrasting a charger parameter table. The specific charger program settings for each model are shown in figure 3.

The charging parameter detection method of the charger of the electric road vehicle (EVF series battery) for the road vehicle lead-acid storage battery in the current market (such as charger manufacturers of Zhuhai Yinbole, Hangzhou Happy charging, Xian Sheng Tang, Ningbo Hua, Shanghai border and the like) is a multi-section variable voltage intermittent charging method, and is shown in figure 4. The charging method limits the maximum voltage and the charging stage time in each step, and can ensure that the storage battery obtains enough electric quantity and simultaneously protects the battery.

The charging method of the battery charger of the electric road vehicle needs to strictly verify the charging time, current and voltage of each stage according to the requirements of related charging parameters and judge whether the charging time, current and voltage are qualified or not. However, in the present invention, since a rapid detection method is adopted, attention is only paid to whether or not the current and the voltage at each stage satisfy the requirements.

After the devices are connected according to fig. 1, according to the charging mode of fig. 4, a four-step procedure is selected on the dc electronic load 4 through the procedure selection button 5 to test parameters of the charger, and related setting parameters and test parameters are displayed through the display screen, and the specific operation steps and procedure setting rules are as follows (taking a 60V100Ah charger as an example):

the first step is as follows: the charger is connected and the DC power supply is switched on, and the voltage of the DC power supply 1 is adjusted to 50V. The step is that the switching power supply provides initial voltage for activating the charger;

the second step is that: the direct current electronic load 4 is turned on. Five phase programs are set:

setting CV mode, 50-60V and CC mode, the stage ① provides DC power supply with low voltage for detecting whether the charger has S1 pre-charge stage;

and a second stage: the set value is CV (voltage) mode, the value is 60V-72V, and the test value is CC (current) mode; and a third stage: the set value is CV (voltage) mode, the value is 72V-73.5V, and the test value is CC (current) mode. And the charging in the second stage and the charging in the third stage respectively enter the stages S2 and S3, the stages are constant-current charging, and the charging currents in the two stages are detected along with the increase of the voltage.

The fourth stage is that the set value is in an omega (resistance) mode, the value is 10 omega-42 omega, the test value is in a CV (voltage) mode, the fourth stage is charged into S4 and S5 stages, the constant current and constant voltage charging is converted into trickle charging, because the ② direct current electronic load is in the omega (resistance) mode at the stage and has no voltage limitation, if the charger is set according to the parameters of the figure 2, the voltage reaches the highest value and keeps stable, and meanwhile, when the resistance is increased (the current is reduced) to a certain point, the charger automatically jumps to the next stage (S5), and the highest voltage and the lamp-turning current of the charger can be detected.

The fifth stage: the set value is CV (voltage) mode, the value is 73.5V to 82V, and the test value is CV (voltage) mode. This phase tests whether the charger sets the protection voltage (16.02V/only). When the charger meets the requirement, the test value voltage is maintained to be 69V when the voltage reaches 81V.

After the program of the direct current electronic load 4 runs through five stages, the voltage and the current of each stage are collected, and whether the charger meets the requirements or not can be judged according to the charging curves of the chargers with different models corresponding to the charger. And specific setting parameters of the chargers of various models are shown in figure 5.

The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.

Claims

1. A device for rapidly detecting charging parameters of a charger comprises a direct-current power supply, a direct-current electronic load and a current-limiting resistor, and is characterized in that the direct-current power supply is connected with the current-limiting resistor in series and then connected with the direct-current electronic load in parallel, and a program selection button is arranged on the direct-current electronic load.

2. The apparatus as claimed in claim 1, wherein the program selection button comprises at least one program selection button.

3. The apparatus as claimed in claim 2, wherein the program selection button has different positions, and the different positions correspond to different charging programs.

4. A charging method of the device for rapidly detecting charging parameters of the charger according to any one of claims 1 to 3, wherein the charging method comprises the following steps, the first step: connecting a charger and connecting a direct current power supply; the second step is that: and opening a charging program of the direct current electronic load.

5. The charging method of the device for rapidly detecting the charging parameters of the charger as claimed in claim 4, wherein the charging procedure is configured to have two phases: setting a set value in a voltage mode at 48-58.8V and setting a test value in a current mode at the first stage; the set value of the second stage is set as a current mode, the value is 3A-0A, and the test value is a voltage mode.

6. The charging method of the device for rapidly detecting the charging parameters of the charger as claimed in claim 4, wherein the charging program is configured with five stages: the first stage is as follows: the set value is a voltage mode, the value is 50V-60V, and the test value is a current mode; and a second stage: setting a voltage mode as a set value, wherein the set value is 60-72V, and a test value is a current mode; and a third stage: the set value is a voltage mode, the value is 72V-73.5V, and the test value is a current mode; a fourth stage: the set value is a resistance mode, the value is 10 omega-42 omega, and the test value is a voltage mode. The fifth stage: the set value is voltage mode, the value is 73.5V-82V, and the test value is voltage mode.