CN111366849A - Multi-range high-precision battery testing host and battery testing system - Google Patents
Multi-range high-precision battery testing host and battery testing system Download PDFInfo
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- CN111366849A CN111366849A CN202010149422.0A CN202010149422A CN111366849A CN 111366849 A CN111366849 A CN 111366849A CN 202010149422 A CN202010149422 A CN 202010149422A CN 111366849 A CN111366849 A CN 111366849A
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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]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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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]
- G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a multi-range high-precision battery test host, which comprises: the main machine box body comprises a shell and a power supply, and the power supply is arranged inside the shell; the main control board is arranged in the shell and comprises a DSP processor, an FPGA controller and a parallel DA, and the parallel DA is in signal connection with the FPGA controller, is in signal connection with the DSP processor and is also in electric connection with the drive board; the drive board is arranged in the shell and electrically connected with the main control board and comprises a CPLD controller, an analog switch and a plurality of hardware PID controls, a current signal receiving end of the analog switch is in signal connection with the parallel DA, and the CPLD controller is in signal connection with the FPGA controller; and the control circuit is respectively electrically connected with the CPLD controller and the hardware PID control. The multi-range high-precision battery testing system comprises a multi-range high-precision battery testing host, a master controller and an Ethernet gateway, wherein the master controller is in signal connection with the Ethernet gateway, and the Ethernet gateway is in signal connection with a DSP (digital signal processor) and an FPGA (field programmable gate array) controller respectively.
Description
Technical Field
The invention relates to the technical field of battery testing, in particular to a multi-range high-precision battery testing host and a battery testing system.
Background
With the wide application of batteries in the fields of mobile communication, electronic appliances and the like, the safety accidents of the batteries are frequently exposed. For many electronic production enterprises, battery detection is a daily work, so battery performance detection through a standard system is a way to solve whether a battery is safe and reliable.
In addition to mechanical test, thermal test and environmental simulation test, the most important test items in the general safety test items of the battery are electrical test items of the battery, including overcharge, overdischarge, external short circuit, forced discharge and the like. The electrical detection of the battery is an important means for knowing important parameters of the battery, such as capacity, internal resistance, voltage characteristic, rate characteristic, temperature characteristic, cycle life, energy density and the like, and the electrical parameters are used for demonstrating whether the battery to be detected reaches the initial design target or not on one hand, and on the other hand, the parameters are favorable for better management and control of the battery in operation, and in addition, the electrical detection of the battery can be used for judging whether the battery to be detected reaches the standard or not and whether the application scene of the battery is met or not.
Therefore, the inspection of the battery is an important link in the battery manufacturing process. In the prior art (patent publication No. CN209356646U), three cells can be tested simultaneously, thereby improving the test efficiency. Therefore, the existing battery test host still has the defects that the test speed of the battery is low, the battery test efficiency is low, and meanwhile, the battery detection equipment is too complex and is not beneficial to operation.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a multi-range high-precision battery testing host which has the advantages of high battery testing speed, high precision and convenience in operation; the second objective of the present invention is to provide a battery testing system.
The invention relates to a multi-range high-precision battery test host, which is characterized by comprising the following components:
the main machine box body comprises a shell and a power supply, and the power supply is arranged inside the shell and used for supplying power to the main control board and the drive board;
the main control board is arranged in the shell and comprises a DSP (digital signal processor), an FPGA (field programmable gate array) controller and a parallel DA (digital data acquisition), wherein the parallel DA is in signal connection with the FPGA controller, is in signal connection with the DSP processor and is also electrically connected with the drive board and is used for receiving a power supply signal sent by the DSP processor, converting the power supply signal into a current signal and transmitting the current signal to the drive board; the FPGA controller is used for controlling the driving board to output corresponding test signals according to the current signals so as to test the battery;
the driving board is arranged in the shell, is electrically connected with the main control board, comprises a CPLD controller, an analog switch and a plurality of hardware PID controls, and a current signal receiving end of the analog switch is connected with the parallel DA signal and used for receiving a current signal; the CPLD controller is in signal connection with the FPGA controller and is used for controlling the analog switch to select one of the hardware PID control outputs a corresponding test signal according to the current signal; the hardware PID controller is electrically connected with the CPLD controller and the hardware PID controller respectively; the signal control port controlled by the hardware PID is electrically connected with the signal output port of the analog switch and used for outputting a test signal;
wherein, the test signal refers to the test current of the test battery.
The main control board further comprises a parallel AD, and the parallel AD is respectively controlled by a hardware PID, electrically connected with the FPGA controller and the DSP processor and used for collecting test signals.
The drive board further comprises a relay, and the relay is electrically connected with the CPLD controller and the hardware PID control respectively and is used for controlling charging or discharging.
The battery test host further comprises a heat dissipation device, the heat dissipation device is arranged in the shell and comprises a radiator and a heat dissipation fan, and the drive board is arranged on the radiator; the heat dissipation fan comprises two heat dissipation fans, namely a first fan and a second fan, the radiator is arranged opposite to the first fan, and the main control board is arranged opposite to the second fan.
The radiator is provided with a ventilation groove, and the ventilation groove is opposite to the first fan.
The shell is provided with an air inlet and an air outlet, the first fan is fixed on the air inlet, and the second fan is fixed on the air outlet.
The shell comprises an upper shell and a lower shell, the lower shell comprises a bottom plate and end plates arranged at two ends of the bottom plate, the two end plates are opposite, and an air inlet, an air outlet and a connector are arranged on the end plates; the upper shell frame is arranged on the two end plates and is parallel to the bottom plate, and a space is reserved between the upper shell frame and the bottom plate and used for installing components of the battery test host.
The power supply comprises a first power supply and a second power supply, and the first power supply is electrically connected with the main control board and used for supplying power to the main control board; the second power supply is electrically connected with the driving board and used for supplying power to the driving board.
The battery test system is characterized by comprising the multi-range high-precision battery test host, a master controller and an Ethernet gateway, wherein the master controller is in signal connection with the Ethernet gateway, and the Ethernet gateway is in signal connection with the DSP processor and the FPGA controller respectively and is used for realizing wireless communication among the DSP processor, the FPGA controller and the master controller.
The invention has the beneficial effects that: the multi-range high-precision battery test host can carry out full-automatic test on the battery, has multiple test channels, high test speed and convenient and simple operation, and greatly improves the test efficiency of the battery.
Drawings
FIG. 1 is a schematic structural diagram of a multi-range high-precision battery testing host;
FIG. 2 is a schematic structural view of the battery test mainframe with the upper case removed;
FIG. 3 is a schematic structural diagram of a heat sink and a driving board of the battery test mainframe;
FIG. 4 is a block diagram of a main control board of the battery test host;
FIG. 5 is a block diagram showing the structure of a driver board of the battery test host;
FIG. 6 is a schematic block diagram of a battery test system of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
With reference to the accompanying drawings:
embodiment 1 a multi-range high-precision battery test host 1 according to the present invention includes:
the main machine box body comprises a shell 40 and a power supply, wherein the power supply is arranged inside the shell and used for supplying power to the main control board and the drive board;
the main control board 10 is arranged in the shell 40, and comprises a DSP (digital signal processor), an FPGA (field programmable gate array) controller and a parallel DA (digital data array), wherein the parallel DA is in signal connection with the FPGA controller, is in signal connection with the DSP processor, is also in electric connection with the drive board, and is used for receiving a power supply signal sent by the DSP processor, converting the power supply signal into a current signal and transmitting the current signal to the drive board; the FPGA controller is used for controlling the driving board to output corresponding test signals according to the current signals so as to test the battery;
the driving board 20 is arranged in the shell 40, is electrically connected with the main control board, and comprises a CPLD controller, an analog switch and a plurality of hardware PID controls, wherein a current signal receiving end of the analog switch is connected with the parallel DA signal and is used for receiving a current signal; the CPLD controller is in signal connection with the FPGA controller and is used for controlling the analog switch to select one of the hardware PID control outputs a corresponding test signal according to the current signal; the hardware PID controller is electrically connected with the CPLD controller and the hardware PID controller respectively; the signal control port controlled by the hardware PID is electrically connected with the signal output port of the analog switch and used for outputting a test signal;
wherein, the test signal refers to the test current of the test battery.
The main control board 10 further comprises a parallel AD, and the parallel AD is respectively controlled by a hardware PID, electrically connected with the FPGA controller and the DSP processor and used for collecting test signals.
The driving board 20 further includes a relay, and the relay is electrically connected to the CPLD controller and the hardware PID controller, respectively, and is used for controlling charging or discharging.
The battery test host 1 further comprises a heat dissipation device, the heat dissipation device is arranged in the shell 40 and comprises a heat sink 30 and a heat dissipation fan, and the driving board 20 is arranged on the heat sink 30; the number of the heat dissipation fans is two, namely a first fan 31 and a second fan 12, the heat sink 30 is arranged opposite to the first fan 31, and the main control board 10 is arranged opposite to the second fan 12.
The heat sink 30 is provided with a ventilation slot 32, and the ventilation slot 32 is opposite to the first fan 31.
The housing 40 is provided with an air inlet 421 and an air outlet 422, the first fan 31 is fixed on the air inlet 421, and the second fan 12 is fixed on the air outlet 422.
The shell 40 comprises an upper shell 41 and a lower shell 42, the lower shell comprises a bottom plate and end plates arranged at two ends of the bottom plate, the two end plates are opposite, and an air inlet, an air outlet and a connector are arranged on the end plates; the upper case 41 is mounted on the end plates in parallel with the bottom plate with a space left therebetween for mounting components of the battery test main unit.
The power supply comprises a first power supply 11 and a second power supply 21, and the first power supply is electrically connected with the main control board and used for supplying power to the main control board; the second power supply is electrically connected with the driving board and used for supplying power to the driving board.
Embodiment 2 as shown in fig. 1-4, the invention discloses a multi-range high-precision battery test host 1, which comprises a host box body, a main control board 10 and a drive board 20, wherein the host box body comprises a shell and a power supply, and the power supply is arranged inside the shell and used for supplying power to the main control board and the drive board; the main control board 10 is electrically connected with the driving board 20;
the main control board 10 comprises a DSP processor, an FPGA controller and a parallel DA; the parallel DA and the FPGA controller are in signal connection with the DSP processor, and the parallel DA is in signal connection with the FPGA controller; the FPGA controller is in signal connection with the driving board 20, and the parallel DA is electrically connected with the driving board 20; when the DSP processor inputs a power supply signal to the parallel DA, the parallel DA converts the power supply signal into a current signal and transmits the current signal to the drive board 20, and meanwhile, the FPGA controller controls the drive board 20 to output a corresponding test signal according to the current signal so as to test the battery.
In this embodiment, the multi-range high-precision battery testing host inputs a power signal to the parallel DA through the DSP processor, the parallel DA converts the power signal into a current signal and transmits the current signal to the drive board 20, and the FPGA controller controls the drive board 20 to output a corresponding test signal according to the current signal, thereby implementing a full-automatic test on the battery.
The DSP processor is optimally 200M main frequency DSP28377D, the FPGA controller is optimally 50MFPGA control MCU, and the parallel DA is 14-bit data transmission. The DSP processor, the FPGA controller and the parallel DA have very high running speed, and the battery testing speed is greatly improved.
Embodiment 3 this embodiment differs from the above embodiments in that, as shown in fig. 4-6, the driving board 20 includes a CPLD controller, an analog switch, and a hardware PID control; the CPLD controller is in signal connection with the FPGA controller, and the analog switch is respectively electrically connected with the CPLD controller and the hardware PID controller; and the plurality of hardware PID controls are used for outputting test signals, and when the analog switch receives a current signal, the CPLD controller controls the analog switch to select one of the hardware PID controls to output a corresponding test signal according to the current signal.
In this embodiment, the analog switch is an analog switch with one more selection, and the CPLD controller may control the analog switch to select one of the hardware PID controls; the hardware PID control is a PID control loop with rapid software constant voltage, the speed of data transmission of the PID control loop is very high, the speed of outputting a test signal can be increased, and the test speed of the battery is increased; the PID control loop comprises a shunt, a resistor is arranged in the shunt, different PID control loops can be selected through the analog switch, the current in the resistor can be adjusted by adjusting the size of the resistor in the PID control loop, and therefore the size of an output test signal controlled by hardware PID can be adjusted.
In a preferred embodiment, the main control board 10 further includes a parallel AD for collecting test signals, and the parallel AD is electrically connected to the hardware PID controller, the FPGA controller, and the DSP processor, respectively; the test signal is the test current of the test battery; the driving board 20 further includes a relay for controlling charging or discharging, and the relay is electrically connected to the CPLD controller and the hardware PID controller, respectively.
In the above embodiment, the parallel AD is a 16-bit parallel AD, which can improve the efficiency of acquiring the test signal; the FPGA controller controls the parallel AD acquisition test signals, the DSP processor compares the acquired test signals (test current) with actually set current (power supply signal) so as to judge whether the output test signals meet requirements, and if the output test signals do not meet the requirements, the DSP processor can control the CPLD controller to select a new hardware PID control through the FPGA controller so as to adjust the output test signals; the relay can control the hardware PID to control and output a charging signal or a discharging signal, and when the relay controls the hardware PID to control and output the discharging signal, the hardware PID controls and outputs current to charge a battery; when the relay controls the hardware PID control to output a charging signal, the hardware PID control does not output current, and the battery discharges to charge the hardware PID control, so that the hardware PID control outputs a charging and discharging test signal.
Embodiment 4 the present embodiment is different from embodiment 3 in that, as shown in fig. 1 to 3, the battery test host 1 further includes a heat sink 30, a housing 40, a first fan 31 and a second fan 12; the driving board 20 is disposed below the heat sink 30; the driving plate 20 is arranged below the radiator 30, the radiator is arranged opposite to the first fan 31, a ventilation groove 32 is arranged on the radiator 30, and the ventilation groove 32 is arranged opposite to the first fan 31; the main control board 10 is arranged opposite to the second fan 12; the housing 40 is provided with an air inlet 421 and an air outlet 422, the first fan 31 is fixed on the air inlet 421, and the second fan 12 is fixed on the air outlet 422.
In the present embodiment, the housing 40 includes an upper shell 41 and a lower shell 42, and the main control board 10, the driving board 20, the heat sink 30, the first fan 31 and the second fan 12 are all disposed in the housing; the air inlet 421 and the air outlet 422 are both arranged at two sides of the lower shell 42; the air inlet 421, the first fan 31, the heat sink 30, the second fan 12 and the air outlet 422 are all located on the same straight line; the first fan 31 draws air into the housing 40, so as to rapidly cool the driving board 20 and the main control board 10, and the second fan 12 draws the air out from the air outlet 422, so as to rapidly cool the components in the housing 40.
The ventilation slot 32 disposed on the heat sink 30 is disposed opposite to the first fan 31, and is more favorable for heat dissipation of the driving boards 20 on two sides of the heat sink 30.
In a preferred embodiment, the multi-range high-precision battery test host 1 further comprises a first power supply 11 and a second power supply 21; the first power supply 11 is electrically connected with the main control board 10, and the second power supply 21 is electrically connected with the driving board 20, so that power can be supplied to the main control board 10 and the driving board 20, and mutual interference between the main control board 10 and the driving board 20 can be prevented; the lower casing 42 is further provided with a wiring frame 424 which is beneficial to wiring, the lower casing 42 is further provided with an interface 423 which communicates with the outside or performs charging and discharging, and the interface 423 is electrically connected with the main control board 10 or the driving board 20.
As shown in fig. 6, the present invention further discloses a battery test system, which includes any one of the above-mentioned multi-range high-precision battery test host 1, a computer and an ethernet gateway, wherein the computer is in signal connection with the ethernet gateway, and the ethernet gateway is in signal connection with the DSP processor and the FPGA controller, respectively.
Embodiment 5 the battery test system according to the present invention includes the multirange high-precision battery test host, a master controller and an ethernet gateway, where the master controller is in signal connection with the ethernet gateway, and the ethernet gateway is in signal connection with the DSP processor and the FPGA controller, respectively, and is configured to implement wireless communication among the DSP processor, the FPGA controller, and the master controller.
The computer in the battery test system is in signal connection with the DSP processor and the FPGA controller through the Ethernet gateway, and a user can control the DSP processor and the FPGA controller through the computer, so as to control the CPLD controller to control the analog switch to select a required hardware PID control loop, thereby outputting required battery test information.
The relay can control the hardware PID control to perform charging or discharging, the resistances of the shunts in the hardware PID control are different, as shown in fig. 6, 40mR represents that the resistance in the shunt is 40mR, 0.68R represents that the resistance in the shunt is 0.68R, 2 (hardware PID control 40mR) represents that two resistances of 40mR are connected in parallel, and actually the resistance is 20 mR; the relay adjusts the current in different resistors, so that the output test signal controlled by hardware PID can be adjusted, and various test signals can be output.
The 16-bit parallel AD can quickly acquire the test signal output by the hardware PID control, transmits the test signal to the DSP processor, and uploads the test signal to the computer, so that a user can check the test signal. It is considered that software, such as waveform acquisition software and matlab software, about the multi-range high-precision battery test host 1 may also be installed on the computer. The FPGA controller may also choose not to use the 16-bit parallel AD, or may choose a different network or computer through the ethernet gateway.
In conclusion, the battery test system utilizes the DSP processor and the FPGA controller to control the driver board 20 to rapidly output various test signals, so as to achieve full-automatic battery test, and is simple in operation, fast in speed measurement, and suitable for the requirement of mass production of batteries.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "lateral", "longitudinal", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are used for convenience of description and simplicity of description only, and do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
The embodiments described in this specification are merely illustrative of implementations of the inventive concept and the scope of the present invention should not be considered limited to the specific forms set forth in the embodiments but includes equivalent technical means as would be recognized by those skilled in the art based on the inventive concept.
Claims (9)
1. A multi-range high-precision battery test host is characterized by comprising:
the main machine box body comprises a shell and a power supply, and the power supply is arranged inside the shell and used for supplying power to the main control board and the drive board;
the main control board is arranged in the shell and comprises a DSP (digital signal processor), an FPGA (field programmable gate array) controller and a parallel DA (digital data acquisition), wherein the parallel DA is in signal connection with the FPGA controller, is in signal connection with the DSP processor and is also electrically connected with the drive board and is used for receiving a power supply signal sent by the DSP processor, converting the power supply signal into a current signal and transmitting the current signal to the drive board; the FPGA controller is used for controlling the driving board to output corresponding test signals according to the current signals so as to test the battery;
the driving board is arranged in the shell, is electrically connected with the main control board, comprises a CPLD controller, an analog switch and a plurality of hardware PID controls, and a current signal receiving end of the analog switch is connected with the parallel DA signal and used for receiving a current signal; the CPLD controller is in signal connection with the FPGA controller and is used for controlling the analog switch to select one of the hardware PID control outputs a corresponding test signal according to the current signal; the hardware PID controller is electrically connected with the CPLD controller and the hardware PID controller respectively; the signal control port controlled by the hardware PID is electrically connected with the signal output port of the analog switch and used for outputting a test signal;
wherein, the test signal refers to the test current of the test battery.
2. The multirange high accuracy battery test mainframe of claim 1, characterized in that: the main control board further comprises a parallel AD, and the parallel AD is respectively controlled by a hardware PID, electrically connected with the FPGA controller and the DSP processor and used for collecting test signals.
3. The multi-range high-precision battery test host according to claim 2, wherein: the drive board further comprises a relay, and the relay is electrically connected with the CPLD controller and the hardware PID control respectively and is used for controlling charging or discharging.
4. The multi-range high-precision battery test host according to claim 3, wherein: the battery test host further comprises a heat dissipation device, the heat dissipation device is arranged in the shell and comprises a radiator and a heat dissipation fan, and the drive board is arranged on the radiator; the heat dissipation fan comprises two heat dissipation fans, namely a first fan and a second fan, the radiator is arranged opposite to the first fan, and the main control board is arranged opposite to the second fan.
5. The multi-range high-precision battery test host according to any one of claims 1-4, wherein: the radiator is provided with a ventilation groove, and the ventilation groove is opposite to the first fan.
6. The multirange high accuracy battery test host of any one of claim 5, characterized in that: the shell is provided with an air inlet and an air outlet, the first fan is fixed on the air inlet, and the second fan is fixed on the air outlet.
7. The multirange high accuracy battery test host of any one of claim 6, characterized in that: the shell comprises an upper shell and a lower shell, the lower shell comprises a bottom plate and end plates arranged at two ends of the bottom plate, the two end plates are opposite, and an air inlet, an air outlet and a connector are arranged on the end plates; the upper shell frame is arranged on the two end plates and is parallel to the bottom plate, and a space is reserved between the upper shell frame and the bottom plate and used for installing components of the battery test host.
8. The multirange high accuracy battery test host of any one of claim 7, characterized in that: the power supply comprises a first power supply and a second power supply, and the first power supply is electrically connected with the main control board and used for supplying power to the main control board; the second power supply is electrically connected with the driving board and used for supplying power to the driving board.
9. A battery test system, characterized in that, includes the multirange high accuracy battery test host computer of any one of claims 1-8, still includes total controller and ethernet gateway, the total controller with the signal connection of ethernet gateway, the ethernet gateway respectively with DSP treater and FPGA controller signal connection for realize the wireless communication between DSP treater, FPGA controller and the total controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010149422.0A CN111366849A (en) | 2020-03-05 | 2020-03-05 | Multi-range high-precision battery testing host and battery testing system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010149422.0A CN111366849A (en) | 2020-03-05 | 2020-03-05 | Multi-range high-precision battery testing host and battery testing system |
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| CN111366849A true CN111366849A (en) | 2020-07-03 |
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| CN202010149422.0A Pending CN111366849A (en) | 2020-03-05 | 2020-03-05 | Multi-range high-precision battery testing host and battery testing system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112363066A (en) * | 2020-09-16 | 2021-02-12 | 武汉市蓝电电子股份有限公司 | Battery testing method and device capable of automatically switching measuring ranges |
| CN113473650A (en) * | 2021-06-01 | 2021-10-01 | 达诺尔电气(集团)有限公司 | Intelligent distributed gateway based on AIot technology and use method thereof |
-
2020
- 2020-03-05 CN CN202010149422.0A patent/CN111366849A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112363066A (en) * | 2020-09-16 | 2021-02-12 | 武汉市蓝电电子股份有限公司 | Battery testing method and device capable of automatically switching measuring ranges |
| CN112363066B (en) * | 2020-09-16 | 2024-02-23 | 武汉市蓝电电子股份有限公司 | Battery testing method and device capable of automatically switching measuring ranges |
| CN113473650A (en) * | 2021-06-01 | 2021-10-01 | 达诺尔电气(集团)有限公司 | Intelligent distributed gateway based on AIot technology and use method thereof |
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