A multi-range high-precision battery testing host and battery testing system

Abstract

The invention discloses a multi-range high-precision battery test host, comprising: a host box, comprising a shell and a power supply, the power supply is arranged inside the shell; a main control board, arranged inside the shell, comprising a DSP processor, an FPGA controller and a parallel DA, the parallel DA and the FPGA controller are connected by signal, and are both connected by signal with the DSP processor, and are also electrically connected with a drive board; and a drive board, arranged inside the shell and electrically connected with the main control board, comprising a CPLD controller, an analog switch and a plurality of hardware PID controls, the current signal receiving end of the analog switch is connected by signal with the parallel DA, the CPLD controller is connected by signal with the FPGA controller; and is electrically connected with the CPLD controller and the hardware PID control respectively. It also discloses a battery test system, comprising a multi-range high-precision battery test host, a master controller and an Ethernet gateway, the master controller is connected by signal with the Ethernet gateway, and the Ethernet gateway is respectively connected by signal with the DSP processor and the FPGA controller.

Description

Technical Field

[0001] The present invention relates to the technical field of battery testing, and in particular to a multi-range high-precision battery testing host and a battery testing system. Background Art

[0002] With the widespread use of batteries in mobile communications and electronic appliances, battery safety accidents have frequently been exposed. Battery testing has become a daily task for many electronic manufacturers, so battery performance testing through a standard system is a way to determine whether the battery is safe and reliable.

[0003] In addition to mechanical testing, thermal testing, and environmental simulation testing, the most important test item in general battery safety testing is the electrical testing of the battery, including overcharging, overdischarging, external short circuit, forced discharge, etc. The electrical testing of the battery is an important means for us to understand the important parameters of the battery, such as capacity, internal resistance, voltage characteristics, rate characteristics, temperature characteristics, cycle life, energy density, etc. On the one hand, these electrical parameters are used to prove whether the tested battery has achieved the original design goals. On the other hand, these parameters can be used to better manage and control the operating battery. In addition, they can also be used to determine whether the tested battery meets the standards and whether it meets its application scenarios.

[0004] Therefore, battery testing is an important part of the battery manufacturing process. In the prior art (Patent Publication No.: CN209356646U), three batteries can be tested at the same time to improve the test efficiency. Therefore, the existing battery testing host still has a slow test speed, which leads to low battery testing efficiency. At the same time, the battery testing equipment is too complicated and not conducive to operation. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, one of the purposes of the present invention is to provide a multi-range high-precision battery testing host, which has a fast battery testing rate, high accuracy and easy operation; the second purpose of the present invention is to provide a battery testing system.

[0006] The multi-range high-precision battery testing host of the present invention is characterized by comprising:

[0007] The mainframe box includes a housing and a power supply, wherein the power supply is arranged inside the housing and is used to supply power to the main control board and the driver board;

[0008] A main control board is arranged in the housing, and includes a DSP processor, an FPGA controller and a parallel DA. The parallel DA is signal-connected to the FPGA controller, and is signal-connected to the DSP processor, and is also electrically connected to the driver board, and is used to receive the power signal sent by the DSP processor, convert it into a current signal, and transmit it to the driver board; and the FPGA controller is used to control the driver board to output a corresponding test signal according to the current signal to test the battery;

[0009] and a driving board, which is arranged in the housing and electrically connected to the main control board, including a CPLD controller, an analog switch and a plurality of hardware PID controls, wherein the current signal receiving end of the analog switch is connected to the parallel DA signal for receiving the current signal; the CPLD controller is connected to the FPGA controller signal for controlling the analog switch to select a test signal corresponding to one of the hardware PID control outputs according to the current signal; and is electrically connected to the CPLD controller and the hardware PID control respectively; the signal control port of the hardware PID control is electrically connected to the signal output port of the analog switch for outputting the test signal;

[0010] The test signal refers to a test current for testing the battery.

[0011] The main control board also includes a parallel AD, which is electrically connected to the hardware PID control, the FPGA controller and the DSP processor respectively, and is used to collect test signals.

[0012] The driving board also includes a relay, which is electrically connected to the CPLD controller and the hardware PID control respectively, and is used to control charging or discharging.

[0013] The battery testing host also includes a heat dissipation device, which is arranged in a shell and includes a radiator and a heat dissipation fan. The drive board is arranged on the radiator; there are 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.

[0014] The radiator is provided with a ventilation slot, and the ventilation slot is arranged opposite to the first fan.

[0015] The housing 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.

[0016] The shell includes an upper shell and a lower shell, the lower shell includes a bottom plate and end plates arranged at both ends of the bottom plate, the two end plates are opposite to each other, and the end plates are provided with air inlets, air outlets and interfaces; the upper shell frame is installed on the two end plates and is parallel to the bottom plate, and a space is left between the two for installing components of the battery test host.

[0017] The power supply includes a first power supply and a second power supply. The first power supply is electrically connected to the main control board for supplying power to the main control board; the second power supply is electrically connected to the driving board for supplying power to the driving board.

[0018] A battery testing system, characterized in that it comprises the multi-range high-precision battery testing host, a main controller and an Ethernet gateway as described in the present invention, wherein the main controller is signal-connected to the Ethernet gateway, and the Ethernet gateway is signal-connected to the DSP processor and the FPGA controller respectively, so as to realize wireless communication between the DSP processor, the FPGA controller and the main controller.

[0019] The beneficial effects of the present invention are as follows: the multi-range high-precision battery test host can perform fully automatic testing on batteries, has multiple test channels, fast test speed, and is convenient and simple to operate, thereby greatly improving the test efficiency of the batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the structure of a multi-range high-precision battery test host;

[0021] Figure 2 A schematic diagram of the structure of the battery test host with the upper shell removed;

[0022] Figure 3 A schematic diagram of the structure of the radiator and the driver board of the battery test host;

[0023] Figure 4 The structural block diagram of the main control board of the battery test host;

[0024] Figure 5 A structural block diagram of the driver board of the battery test host;

[0025] Figure 6 Principle block diagram of the battery testing system of the present invention. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with the accompanying drawings.

[0027] Refer to the attached figure:

[0028] Embodiment 1 A multi-range high-precision battery testing host 1 according to the present invention comprises:

[0029] The mainframe housing includes a housing 40 and a power supply, wherein the power supply is arranged inside the housing and is used to supply power to the main control board and the driver board;

[0030] The main control board 10 is arranged in the housing 40, and includes a DSP processor, an FPGA controller and a parallel DA. The parallel DA is connected to the FPGA controller by signal, and is also connected to the DSP processor by signal, and is also electrically connected to the driver board, and is used to receive the power signal sent by the DSP processor, convert it into a current signal and transmit it to the driver board; and the FPGA controller is used to control the driver board to output a corresponding test signal according to the current signal to test the battery;

[0031] and a driving board 20, which is arranged in a housing 40 and is electrically connected to the main control board, including a CPLD controller, an analog switch and a plurality of hardware PID controls, wherein the current signal receiving end of the analog switch is connected to the parallel DA signal for receiving the current signal; the CPLD controller is connected to the FPGA controller signal for controlling the analog switch to select a test signal corresponding to one of the hardware PID control outputs according to the current signal; and is electrically connected to the CPLD controller and the hardware PID control respectively; the signal control port of the hardware PID control is electrically connected to the signal output port of the analog switch for outputting the test signal;

[0032] The test signal refers to a test current for testing the battery.

[0033] The main control board 10 also includes a parallel AD, which is electrically connected to the hardware PID control, the FPGA controller and the DSP processor respectively, and is used to collect test signals.

[0034] The driving board 20 further includes a relay, which is electrically connected to the CPLD controller and the hardware PID control respectively, for controlling charging or discharging.

[0035] The battery testing host 1 also includes a heat dissipation device, which is arranged in a shell 40 and includes a radiator 30 and a heat dissipation fan. The driving board 20 is arranged on the radiator 30; there are two heat dissipation fans, namely a first fan 31 and a second fan 12. The radiator 30 is arranged opposite to the first fan 31, and the main control board 10 is arranged opposite to the second fan 12.

[0036] The heat sink 30 is provided with a ventilation slot 32 , and the ventilation slot 32 is arranged opposite to the first fan 31 .

[0037] 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 .

[0038] The shell 40 includes an upper shell 41 and a lower shell 42. The lower shell includes a bottom plate and end plates arranged at both ends of the bottom plate. The two end plates are opposite to each other, and air inlets, air outlets and interfaces are arranged on the end plates. The upper shell 41 is mounted on the two end plates and is parallel to the bottom plate. A space is left between the two for installing components of the battery test host.

[0039] The power supply includes a first power supply 11 and a second power supply 21. The first power supply is electrically connected to the main control board for supplying power to the main control board; the second power supply is electrically connected to the driving board for supplying power to the driving board.

[0040] Example 2 Figure 1-4 As shown, the present invention discloses a multi-range high-precision battery test host 1, comprising a host box, a main control board 10 and a driving board 20, wherein the host box comprises a housing and a power supply, and the power supply is arranged inside the housing for supplying power to the main control board and the driving board; the main control board 10 is electrically connected to the driving board 20;

[0041] The main control board 10 includes a DSP processor, an FPGA controller and a parallel DA; the parallel DA and the FPGA controller are both signal-connected to the DSP processor, and the parallel DA is signal-connected to the FPGA controller; the FPGA controller is signal-connected to the driver board 20, and the parallel DA is electrically connected to the driver board 20; when the DSP processor inputs a power signal to the parallel DA, the parallel DA converts the power signal into a current signal and transmits it to the driver board 20, and at the same time the FPGA controller controls the driver board 20 to output a corresponding test signal according to the current signal, thereby testing the battery.

[0042] In this embodiment, the multi-range high-precision battery testing host inputs a power signal to the parallel DA through the DSP processor, and the parallel DA converts the power signal into a current signal and transmits it to the driving board 20. The FPGA controller controls the driving board 20 to output a corresponding test signal according to the current signal, thereby realizing fully automatic testing of the battery. Therefore, the entire battery testing operation is simple and convenient.

[0043] The DSP processor is preferably a 200M main frequency DSP28377D, the FPGA controller is preferably a 50MFPGA control MCU, and the parallel DA is a 14-bit data transmission. The DSP processor, the FPGA controller and the parallel DA run at very high speeds, which greatly improves the speed of battery testing.

[0044] Embodiment 3 The difference between this embodiment and the above embodiment is that Figure 4-6 As shown, the driving board 20 includes a CPLD controller, an analog switch and a hardware PID control; the CPLD controller is signal-connected to the FPGA controller, and the analog switch is electrically connected to the CPLD controller and the hardware PID control respectively; the hardware PID control has multiple ones for outputting test signals, and when the analog switch receives a current signal, the CPLD controller controls the analog switch to select a test signal corresponding to one of the hardware PID controls output according to the current signal.

[0045] In this embodiment, the analog switch is a multiple-select analog switch, and the CPLD controller can control the analog switch to select one of the hardware PID controls; the hardware PID control is a fast software constant-voltage PID control loop, and the data transmission speed of the PID control loop is very high, which can increase the speed of outputting test signals, thereby increasing the battery test speed; the PID control loop includes a shunt, and a resistor is provided in the shunt. Different PID control loops can be selected through the analog switch, and the size of the current in the resistor can be adjusted by adjusting the size of the resistor in the PID control loop, thereby adjusting the size of the output test signal of the hardware PID control.

[0046] In a preferred embodiment, the main control board 10 also includes a parallel AD for collecting test signals, and the parallel AD is electrically connected to the hardware PID control, the FPGA controller and the DSP processor respectively; the test signal is a test current for testing the battery; the drive board 20 also includes a relay for controlling charging or discharging, and the relay is electrically connected to the CPLD controller and the hardware PID control respectively.

[0047] In the above implementation, the parallel AD is a 16-bit parallel AD, which can improve the efficiency of collecting test signals; the FPGA controller controls the parallel AD to collect test signals, and the DSP processor compares the collected test signal (test current) with the actual set current (power signal) to determine whether the output test signal meets the requirements. If it does not meet the requirements, the DSP processor can control the CPLD controller through the FPGA controller to select a new hardware PID control to adjust the output test signal; the relay can control the hardware PID control to output a charging signal or a discharging signal. When the relay controls the hardware PID control to output a discharging signal, the hardware PID control outputs current to charge the 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.

[0048] Embodiment 4 This embodiment is different from Embodiment 3 in that Figure 1-3 As shown, the battery testing host 1 also includes a radiator 30, a shell 40, a first fan 31 and a second fan 12; the driving plate 20 is arranged below the radiator 30; the radiator 30 has the driving plate 20 arranged thereunder, which is arranged opposite to the first fan 31, and the radiator 30 is provided with ventilation slots 32, which are arranged opposite to the first fan 31; the main control board 10 is arranged opposite to the second fan 12; the shell 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.

[0049] In this embodiment, the outer shell 40 includes an upper shell 41 and a lower shell 42, and the main control board 10, the drive board 20, the radiator 30, the first fan 31 and the second fan 12 are all arranged in the outer shell; the air inlet 421 and the air outlet 422 are both arranged on both sides of the lower shell 42; the air inlet 421, the first fan 31, the radiator 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 outer shell 40, which can quickly cool down the drive board 20 and the main control board 10, and the air is then drawn out from the air outlet 422 by the second fan 12, so that the components in the outer shell 40 are quickly cooled.

[0050] The ventilation slots 32 disposed on the radiator 30 are arranged opposite to the first fan 31 , which is more conducive to heat dissipation of the driving plates 20 on both sides of the radiator 30 .

[0051] In a preferred embodiment, the multi-range high-precision battery testing host 1 also includes a first power supply 11 and a second power supply 21; the first power supply 11 is electrically connected to the main control board 10, and the second power supply 21 is electrically connected to the drive board 20, which is beneficial to powering the main control board 10 and the drive board 20, and can also prevent the main control board 10 and the drive board 20 from interfering with each other; the lower shell 42 is also provided with a wiring rack 424 that is convenient for wiring, and the lower shell 42 is also provided with an interface 423 for communicating with the outside or charging and discharging, and the interface 423 is electrically connected to the main control board 10 or the drive board 20.

[0052] like Figure 6 As shown, the present invention also discloses a battery testing system, comprising the multi-range high-precision battery testing host 1 described in any one of the above items, and also comprising a computer and an Ethernet gateway, wherein the computer is signal-connected to the Ethernet gateway, and the Ethernet gateway is signal-connected to the DSP processor and the FPGA controller respectively.

[0053] Example 5 A battery testing system described in the present invention includes the multi-range high-precision battery testing host, a main controller and an Ethernet gateway, wherein the main controller is signal-connected to the Ethernet gateway, and the Ethernet gateway is signal-connected to the DSP processor and the FPGA controller respectively, so as to realize wireless communication between the DSP processor, the FPGA controller and the main controller.

[0054] The computer in the battery testing system is connected to the DSP processor and the FPGA controller by signals through an Ethernet gateway. The user can control the DSP processor and the FPGA controller through the computer, and then control the CPLD controller to control the analog switch to select the required hardware PID control loop, thereby outputting the required battery test information.

[0055] The relay can control the hardware PID control to charge or discharge. The resistance of the shunt in the hardware PID control is different, such as Figure 6 In the figure, 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 there are two 40mR resistors in parallel in the shunt, and the actual resistance is 20mR; by adjusting the current in different resistors through the relay, the output test signal of the hardware PID control can be adjusted, and then a variety of test signals can be output.

[0056] Among them, the 16-bit parallel AD can quickly collect the test signal output by the hardware PID control, and pass it to the DSP processor, and then upload it to the computer, so that the user can view the test signal. It can be considered that the software related to the multi-range high-precision battery test host 1, such as waveform acquisition software and matlab software, can also be installed on the computer. The FPGA controller can also choose not to use the 16-bit parallel AD, and can also select different networks or computers through the Ethernet gateway.

[0057] In summary, the battery testing system utilizes the DSP processor and the FPGA controller to control the driving board 20 to quickly output various test signals, thereby realizing fully automatic battery testing, which is simple to operate and has a fast test rate, and is suitable for the needs of mass production of batteries.

[0058] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "lateral", "longitudinal", "horizontal", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0059] The contents described in the embodiments of this specification are merely an enumeration of implementation forms of the inventive concept. The protection scope of the present invention should not be regarded as limited to the specific forms described in the embodiments. The protection scope of the present invention also includes equivalent technical means that can be thought of by those skilled in the art based on the inventive concept.

Claims

1. A multi-range high-precision battery testing host, characterized in that: include: The mainframe box includes a housing and a power supply, wherein the power supply is arranged inside the housing and is used to supply power to the main control board and the driver board; A main control board is arranged in the housing, and includes a DSP processor, an FPGA controller and a parallel DA. The parallel DA is signal-connected to the FPGA controller, and is signal-connected to the DSP processor, and is also electrically connected to the driver board, and is used to receive the power signal sent by the DSP processor, convert it into a current signal, and transmit it to the driver board; and the FPGA controller is used to control the driver board to output a corresponding test signal according to the current signal to test the battery; and a driving board, which is arranged in the housing and electrically connected to the main control board, including a CPLD controller, an analog switch and a plurality of hardware PID controls, wherein the current signal receiving end of the analog switch is connected to the parallel DA signal for receiving the current signal; the CPLD controller is connected to the FPGA controller signal for controlling the analog switch to select a test signal corresponding to one of the hardware PID control outputs according to the current signal; and is electrically connected to the CPLD controller and the hardware PID control respectively; the signal control port of the hardware PID control is electrically connected to the signal output port of the analog switch for outputting the test signal; Wherein, the test signal refers to the test current of the test battery; The main control board also includes a parallel AD, which is electrically connected to the hardware PID control, the FPGA controller and the DSP processor respectively, and is used to collect test signals; The driving board also includes a relay, which is electrically connected to the CPLD controller and the hardware PID control respectively, and is used to control charging or discharging.

2. The multi-range high-precision battery testing host according to claim 1, characterized in that: The battery testing host also includes a heat dissipation device, which is arranged in a shell and includes a radiator and a heat dissipation fan. The drive board is arranged on the radiator; there are 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.

3. The multi-range high-precision battery testing host according to claim 2, characterized in that: The radiator is provided with a ventilation slot, which is arranged opposite to the first fan.

4. The multi-range high-precision battery testing host according to claim 2, characterized in that: The housing 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.

5. The multi-range high-precision battery testing host according to claim 4, characterized in that: The shell includes an upper shell and a lower shell, the lower shell includes a bottom plate and end plates arranged at both ends of the bottom plate, the two end plates are opposite to each other, and the end plates are provided with air inlets, air outlets and interfaces; the upper shell frame is installed on the two end plates and is parallel to the bottom plate, and a space is left between the two for installing components of the battery test host.

6. The multi-range high-precision battery testing host according to claim 5, characterized in that: The power supply includes a first power supply and a second power supply. The first power supply is electrically connected to the main control board for supplying power to the main control board; the second power supply is electrically connected to the driving board for supplying power to the driving board.

7. A battery testing system, characterized in that: The invention comprises the multi-range high-precision battery testing host as described in any one of claims 1 to 6, and also comprises a main controller and an Ethernet gateway, wherein the main controller is connected to the Ethernet gateway signal, and the Ethernet gateway is respectively connected to the DSP processor and the FPGA controller signal, so as to realize wireless communication between the DSP processor, the FPGA controller and the main controller.

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