Passive whole battery pack automatic tester

Abstract

The utility model discloses a passive whole-pack battery automatic tester, which relates to the technical field of battery testers and comprises a shell main body, and a current controller, a current regulating potentiometer, a motor, a core circuit board, a voltage converter and a shunt are fixedly arranged in the shell main body. According to the utility model, current detection is carried out through the current detection module and is fed back to the core controller, and then the core controller controls the motor to adjust the current adjusting potentiometer and further controls the PWM output duty ratio of the current controller in a discharge detection loop, so that the purpose of controlling the current to be constant is achieved; the constant test current can improve the accuracy of battery test data, and when the battery is detected and the voltage of the detected battery reaches a rated under-voltage value, the core controller automatically cuts off the discharge current and simultaneously sends a signal to enable the buzzer to act and give an alarm sound to prompt a worker that the discharge is finished, so that the work efficiency is improved. And the efficiency and automation of the whole battery detection process are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery tester technical field, especially relate to a passive whole battery automatic tester. BACKGROUND

[0002] Nowadays, electric vehicles have become an indispensable means of transport when people travel daily. And the power source of electric vehicles - batteries, is an extremely important component on electric vehicles. The state of the battery is not only directly related to the running mileage of the electric vehicle, but also concerns the safety of the personnel when riding.

[0003] The battery repeatedly charges and discharges during use, and as the number of uses and time increases, the electric vehicle battery will have aging problems, especially its capacity will be reduced. The reduction of capacity will greatly affect the driving range of the electric vehicle. At this time, it is necessary to replace the battery to ensure the working condition of the electric vehicle. Therefore, the capacity detection of the battery has become a necessary link.

[0004] The existing battery detection technology usually uses a load with constant resistance to discharge the fully charged battery for detection, but it needs manual real-time monitoring of the working state of the discharge detection instrument, and because the discharge resistance is constant, the decrease of the discharge current caused by the decrease of the battery voltage during discharge cannot guarantee the constant current discharge of the battery. Since the standard for determining whether the battery is normal or not is the discharge time under constant current discharge, this detection method will produce a large error, thus greatly reducing the accuracy of the detection data. In addition, the traditional detection equipment also needs to manually disassemble the battery pack before detecting the single battery, and also needs to provide additional working power, which makes the detection process very inconvenient. In addition, the operator needs to adjust the discharge current size and pay attention to whether the discharge is completed at any time during detection, and turn off the instrument in time when the discharge is completed, otherwise it will cause the battery to be over-discharged and damaged, and finally the operator needs to calculate the discharge time data and other work, which reduces the working efficiency of the operator and greatly reduces the practicability.

[0005] Therefore, it is necessary to invent a passive whole battery automatic tester to solve the above problems. CONTENT OF THE UTILITY MODEL

[0006] According to one aspect of the present disclosure, the following technical solution is provided: a passive whole battery automatic tester, comprising a shell body, a current controller, a current adjusting potentiometer, a shaft coupling, a motor, a wire, a core circuit board, a voltage converter and a shunt are fixedly arranged inside the shell body, the current controller is connected with an air switch through a wire, one end of the motor is connected with a motor drive module on the core circuit board through a wire, and the other end is connected with one end of the current adjusting potentiometer through the shaft coupling, the other end of the current adjusting potentiometer is connected with the current controller through a wire, the output end of the voltage converter is connected with the core circuit board through a wire, and the input end is connected with an air switch and a negative connection line, the main terminal of the shunt is connected between the current controller and a MOS tube on the core circuit board through a wire, and the auxiliary terminal of the shunt is connected with a current detection module on the core circuit board through a wire, and the current controller is used for adjusting the PWM output duty cycle of the discharge detection loop, and the equivalent load resistance value changes with the measured battery voltage, and the current is further controlled to be constant.

[0007] According to the passive whole battery automatic tester according to at least one embodiment of the present disclosure, the core circuit board is integrated with a current detection module, a voltage detection and comparison module, a motor drive module, a timer control module, a MOS tube, a buzzer, a core controller and a power module, and the core controller is used for controlling the motor to adjust the current adjusting potentiometer and further controlling the current controller.

[0008] According to the passive whole battery automatic tester according to at least one embodiment of the present disclosure, the surface of the shell body is further fixedly embedded with an air switch, one end of the air switch is connected with the current controller and the voltage converter through a wire, and the other end is fixedly connected with a positive connection line, the other end of the other negative connection line is introduced into the instrument through the hole in the back of the shell body and connected with the input end of the current controller and the voltage converter through a wire, and one end of the two positive and negative connection lines is fixedly connected with a crocodile clamp.

[0009] According to the passive whole battery automatic tester according to at least one embodiment of the present disclosure, the shell body is further fixedly connected with an ammeter, a voltmeter, a selection button, a display, a controller switch, a timer, a load resistor, a ceramic column and a fan, the load resistor is a constantan wire and is wound on the ceramic column. One end of the load resistor is connected with the current controller through a wire, and the other end is connected with a MOS tube on the core circuit board through a wire.

[0010] The technical effects and advantages of the present application are as follows:

[0011] The utility model discloses a current detection module carries out current detection, and feedback is given to core controller, and then by core controller control motor adjusts current regulating potentiometer and further control current controller in the PWM output duty cycle of discharge detection loop, and equivalent load resistance resistance value changes with the change of the battery voltage of being measured, to reach the purpose of controlling current constant, improves the accuracy of battery detection data.

[0012] The utility model discloses a current detection module carries out current detection, and feedback is given to core controller, and then by core controller control motor adjusts current regulating potentiometer and further control current controller in the PWM output duty cycle of discharge detection loop, and equivalent load resistance resistance value changes with the change of the battery voltage of being measured, to reach the purpose of controlling current constant, improves the accuracy of battery detection data.

[0013] The utility model discloses a current detection module carries out current detection, and feedback is given to core controller, and then by core controller control motor adjusts current regulating potentiometer and further control current controller in the PWM output duty cycle of discharge detection loop, and equivalent load resistance resistance value changes with the change of the battery voltage of being measured, to reach the purpose of controlling current constant, improves the accuracy of battery detection data.

[0014] The utility model discloses a current detection module carries out current detection, and feedback is given to core controller, and then by core controller control motor adjusts current regulating potentiometer and further control current controller in the PWM output duty cycle of discharge detection loop, and equivalent load resistance resistance value changes with the change of the battery voltage of being measured, to reach the purpose of controlling current constant, improves the accuracy of battery detection data.

[0015] The utility model discloses a current detection module carries out current detection, and feedback is given to core controller, and then by core controller control motor adjusts current regulating potentiometer and further control current controller in the PWM output duty cycle of discharge detection loop, and equivalent load resistance resistance value changes with the change of the battery voltage of being measured, to reach the purpose of controlling current constant, improves the accuracy of battery detection data. DRAWINGS

[0016] The accompanying drawings, which are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the present disclosure and together with the description serve to explain the principles of the present disclosure.

[0017] Figure 1 It is the external structure schematic diagram of passive whole group battery automatic tester according to one embodiment of the present disclosure.

[0018] Figure 2 It is the internal structure schematic diagram of passive whole group battery automatic tester according to one embodiment of the present disclosure.

[0019] Figure 3 It is the internal structure circuit connection diagram of passive whole group battery automatic tester according to one embodiment of the present disclosure.

[0020] Figure 4 It is the core circuit board integration schematic diagram of passive whole group battery automatic tester according to one embodiment of the present disclosure.

[0021] Figure 5 This is a rear view of a passive battery pack automatic tester according to one embodiment of the present disclosure.

[0022] The specific labels in the attached figures are as follows:

[0023] 1. Main casing; 2. Ammeter; 3. Voltmeter; 4. Display; 5. Controller switch; 6. Select button; 7. Timer; 8. Load resistor; 9. Ceramic pillar; 10. Air switch; 11. Fan; 12. Current controller; 13. Current adjustment potentiometer; 14. Coupling; 15. Motor; 16. Wire; 17. Core circuit board; 18. Voltage converter; 19. Shunt; 20. Alligator clip; 21. Connecting wire; 22. Current detection module; 23. Voltage detection and comparison module; 24. Motor drive module; 25. Timer control module; 26. MOSFET; 27. Buzzer; 28. Core controller; 29. ​​Power supply module. Detailed Implementation

[0024] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present disclosure are shown in the accompanying drawings.

[0025] like Figures 1-2 As shown, the passive automatic battery tester disclosed herein includes a housing body 1. An ammeter 2, a voltmeter 3, a selection button 6, a display 4, a controller switch 5, a timer 7, a load resistor 8, a ceramic column 9, and a fan 11 are fixedly connected to the outside of the housing body 1. The load resistor 8 is made of constantan wire and wound around the ceramic column 9. The selection button 6 has three buttons: a voltage selection button, a current selection button, and a confirmation button. The operating voltage and current of the tester are selected by pressing the voltage and current selection buttons, and the instrument starts working by pressing the confirmation button. The display 4 shows the currently set and real-time discharge voltage and current values. The operator controls the automatic battery tester to turn on and off using the controller switch 5. The fan 11 dissipates heat from the battery tester to ensure its normal operation.

[0026] like Figures 1-2As shown, in the present disclosure, the surface of the shell body 1 is also fixedly embedded with an air switch 10, one end of which is connected with the current controller 12 and the voltage converter 18 through the wire 16, and the other end is fixedly connected with a positive connection wire 21.1, and the other negative connection wire 21.2 is introduced into the instrument interior through the hole on the back of the shell body 1 and is connected with the input end of the current controller 12 and the voltage converter 18 through the wire 16, and one end of the two positive and negative connection wires 21 is fixedly connected with the crocodile clamp 20 respectively.

[0027] Thus, according to the sequence of the circuit from the positive to the negative, the positive connection wire 21.1 enters the instrument interior through a protective air switch 10, is first connected with the current controller 12, then a hole is punched on the back of the shell 1, the wire 16 is introduced through the hole and connected with the load resistor 8, then returns to the instrument interior and is connected with the MOS tube 26 on the core circuit board 17 through the wire 16, then is connected with the main terminal of the shunt 19 through the wire 16, then passes through the current controller 12, then is connected with the negative connection wire 21.2 through the hole on the shell body 1, and constitutes a discharge detection loop. The staff connects the positive and negative poles of the measured battery through the crocodile clamp 20 and carries out detection.

[0028] As Figures 2-5As shown, in the present disclosure, the inside of the shell body 1 is fixedly provided with a current controller 12, a current regulating potentiometer 13, a shaft coupling 14, a motor 15, a wire 16, a core circuit board 17, a voltage converter 18 and a shunt 19. The current controller 12 is connected with the air switch 10 through the wire 16. One end of the motor 15 is connected with the motor driving module 24 on the core circuit board 17 through the wire 16, and the other end is connected with one end of the current regulating potentiometer 13 through the shaft coupling 14. The other end of the current regulating potentiometer 13 is connected with the current controller 12 through the wire 16. The output end of the voltage converter 18 is connected with the core circuit board 17 through the wire 16, and the input end is connected with the air switch 10 and the negative connection line 21.2 through the wire 16. The main terminal of the shunt 19 is connected between the current controller 12 and the MOS tube on the core circuit board 17 through the wire 16. The auxiliary terminal of the shunt 19 is connected with the current detection module 22 on the core circuit board 17 through the wire 16. A plurality of wires 16 are led out from the core circuit board 17 to each instrument and controller switch on the front of the instrument to display voltage, current and other related data and open and close the core controller 28. The core circuit board 17 is integrated with the current detection module 22, the voltage detection and comparison module 23, the motor driving module 24, the timer control module 25, the MOS tube 26, the buzzer 27, the core controller 28 and the power module 29. Thus, the voltage is converted to 12V by the voltage converter 18 to supply power to each module inside the instrument. The current detection is performed by the current detection module 22, and the feedback is given to the core controller 28. The core controller 28 controls the motor 15 to adjust the current regulating potentiometer 13 and further controls the current controller 12 in the PWM output duty cycle of the discharge detection loop. The equivalent load resistance value changes with the measured battery voltage, so as to achieve the purpose of controlling the constant current. The core controller 28 displays the current setting and real-time discharge voltage and current value through the display 4. At the same time of starting discharge, the core controller 28 sends a pulse signal to the timer control module 25 to control the timer 7 to start timing. The timer 7 has a power-off protection function to prevent accidental power-off. The voltage detection and comparison module 23 continuously works. When the measured battery voltage is lower than the rated undervoltage value, the core controller 28 controls the MOS tube 26 to cut off the discharge current, so as to automatically stop discharge and avoid causing the measured battery to be damaged due to over-discharge. When the rated undervoltage value is reached, the core controller 28 sends a signal while cutting off the discharge current, and at the same time, the timer 7 stops timing, the buzzer 27 works and emits an alarm sound to prompt the staff that the discharge is completed.

[0029] The utility model discloses a purpose at providing a kind of passive whole battery automatic tester, to solve the battery detection technology of existing technology proposed in above background technique generally adopts resistance constant load to discharge detection to battery full of electricity, but its work needs artificial real-time monitoring discharge detection instrument's working state, and since discharge resistance constant, with the discharge of battery voltage drop will lead to discharge current reduction, cannot guarantee battery constant current discharge. Since the standard of determining whether battery is normal is discharge duration under constant current discharge, so this detection method will produce greater error, in addition, traditional detection equipment also needs artificial battery pack to be disassembled to detect single battery, and still need to provide additional working power supply, lead to detection process extremely inconvenient. In addition, operating personnel needs to pay attention to discharge whether end at any time during detection, and instrument is closed in time when discharge ends, otherwise will lead to battery overdischarge and cause power loss damage, finally still need to calculate discharge time data etc. work, therefore this greatly reduces the accuracy of detection data, operating personnel needs real-time supervision and reduces the working efficiency of operating personnel greatly reduces practicability.

[0030] The working power supply of the utility model is provided by the measured battery, without additional connection of other power supply. The convenience of use is improved.

[0031] In the description of the present specification, the description of the terms "one embodiment / way", "some embodiments / ways", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / way or example are included in at least one embodiment / way or example of the present application. In the present specification, the illustrative description of the above terms is not necessarily for the same embodiment / way or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments / ways or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments / ways or examples described in the present specification and the characteristics of different embodiments / ways or examples without contradiction.

[0032] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one feature. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0033] Those skilled in the art should understand that the above embodiments are only for clearly illustrating the present disclosure, and are not intended to limit the scope of the present disclosure. Based on the above disclosure, other changes or modifications can also be made by those skilled in the art, and these changes or modifications are still within the scope of the present disclosure.

Claims

1. A passive battery group automatic tester, comprising a shell body (1), characterized in that: The shell body (1) is internally fixedly provided with a current controller (12), a current regulating potentiometer (13), a shaft coupling (14), a motor (15), a wire (16), a core circuit board (17), a voltage converter (18) and a shunt (19), the current controller (12) is connected with the air switch (10) through the wire (16), one end of the motor (15) is connected with the motor drive module (24) on the core circuit board (17) through the wire (16) and the other end is connected with one end of the current regulating potentiometer (13) through the shaft coupling (14), the other end of the current regulating potentiometer (13) is connected with the current controller (12) through the wire (16), the output end of the voltage converter (18) is connected with the core circuit board (17) through the wire (16) and the input end is connected with the air switch (10) and the negative connection wire (21.2) through the wire (16), the main terminal of the shunt (19) is connected between the current controller (12) and the MOS tube (26) on the core circuit board (17) through the wire (16), the auxiliary terminal of the shunt (19) is connected with the current detection module (22) on the core circuit board (17) through the wire (16), the current controller (12) is used for adjusting the PWM output duty cycle of the discharge detection loop, the equivalent load resistance value changes with the measured battery voltage, and the current is further controlled to be constant. The core circuit board (17) is integrally provided with a current detection module (22), a voltage detection and comparison module (23), a motor drive module (24), a timer control module (25), a MOS tube (26), a buzzer (27), a core controller (28) and a power module (29), and the core controller (28) is used for controlling the motor (15), the current regulating potentiometer (13) and further controlling the current controller (12).

2. The automatic passive battery group tester of claim 1, wherein: The surface of the shell body (1) is further fixedly embedded with an air switch (10), one end of the air switch (10) is connected with the current controller (12) and the voltage converter (18) through the wire (16) and the other end is fixedly connected with a positive connection wire (21.1), the other negative connection wire (21.2) is introduced into the instrument through the hole in the back of the shell body (1) and is connected with the input end of the current controller (12) and the voltage converter (18) through the wire (16), and one end of the two positive and negative connection wires (21) is fixedly connected with an alligator clip (20) respectively.

3. The automatic passive battery group tester of claim 2, wherein: The outer side of the shell body (1) is further fixedly connected with an ammeter (2), a voltmeter (3), a selection button (6), a display (4), a controller switch (5), a timer (7), a load resistance (8), a ceramic column (9) and a fan (11), the load resistance (8) is a constantan wire and is wound on the ceramic column (9), one end of the load resistance (8) is connected with the current controller (12) through the wire (16) and the other end is connected with the MOS tube (26) on the core circuit board (17) through the wire (16).

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