Detection device for measurement and control functionality of storage battery over-temperature protection unit of motor train unit

Abstract

The utility model discloses a motor train unit storage battery over-temperature protection unit measurement and control functional detection device. Comprising a main shell and a plugging female seat which is arranged on the lower surface of the main shell and is plugged with a plugging terminal of the storage battery; a plugging hole is formed in the plugging female seat; the main shell comprises a built-in power supply battery and a main control circuit board; resistance values of the temperature measuring resistors at normal temperature are respectively measured by the resistance measuring unit, and a difference value of the two temperature measuring resistors is measured by the consistency measuring unit, so that effectiveness of the measuring function is preliminarily explained; according to the utility model, a trigger characteristic detection unit is constructed in a mode of parallel connection of resistors, and a high-temperature state is simulated so as to detect the control of a switch in the storage battery. The technical defect that the effectiveness of the temperature measuring resistor and the effectiveness of a control signal cannot be performed when the traditional method of directly pulling out the temperature measuring resistor is used for performing the triggering detection of switch control is overcome, and the safe operation of a train is ensured.

Description

Technical Field

[0001] The embodiments of this utility model belong to the field of battery testing technology, and more specifically, relate to a testing device for the over-temperature protection unit of a high-speed train battery. Background Technology

[0002] As a crucial energy supply unit for high-speed trains, the safety and reliability of the battery directly impacts the train's operational safety. The battery over-temperature protection unit is a key component ensuring the timely disconnection of power to the battery under abnormal temperatures, preventing overheating that could lead to fires or other safety accidents. Therefore, effectively testing the measurement and control functionality of the over-temperature protection unit is not only essential for ensuring the normal operation of the battery system but also a vital link in ensuring safe train operation. Traditional testing methods have limitations, failing to comprehensively assess the effectiveness of the over-temperature protection unit's temperature measurement and switching control. This can lead to misjudgments or omissions during actual operation, thus affecting the train's safety performance. Therefore, developing a device capable of comprehensively testing the measurement and control functionality of the over-temperature protection unit has significant practical importance and application value.

[0003] Currently, the over-temperature protection unit for high-speed train batteries typically includes two sets of temperature-sensing resistors and a power switch. When the temperature-sensing resistors detect that the battery temperature exceeds a set threshold, the over-temperature protection unit automatically shuts off the power switch to protect the battery. Before use, the measurement and control functionality of this over-temperature protection unit usually needs to be tested. The traditional testing method mainly involves directly disconnecting the temperature-sensing resistors and observing whether the power switch is turned off to check if the switch control triggering is working properly.

[0004] Although the above-mentioned existing technology is simple and easy to implement, it has the following obvious defects and improvements: (1) This method can only detect the triggerability of switch control, but cannot fully evaluate the effectiveness of temperature measurement and control signal issuance of the over-temperature protection unit; (2) Considering the convenience of measurement, for the temperature measurement effectiveness detection method, the effectiveness of temperature measurement performance can be preliminarily judged by measuring the error of the temperature measuring resistance value at room temperature and the consistency error of the two sets of temperature measuring resistance values. Utility Model Content

[0005] To address the aforementioned deficiencies or improvement needs of existing technologies, this utility model provides a functional testing device for the over-temperature protection unit of a high-speed train battery. By employing a resistance measurement unit to measure the resistance of temperature-sensing resistors at room temperature and a consistency measurement unit to measure the difference between two temperature-sensing resistors, the effectiveness of the measurement function can be preliminarily demonstrated. A trigger characteristic detection unit is constructed using parallel resistors to simulate a high-temperature state, thereby testing the switch controllability within the battery. This utility model can comprehensively evaluate the testing and control functionality of the over-temperature protection unit within the battery, overcoming the technical shortcomings of traditional methods that rely on directly disconnecting the temperature-sensing resistors for triggerability testing, which fails to verify the effectiveness of the temperature-sensing resistors and the control signal, thus ensuring the safe operation of the train.

[0006] To achieve the above objectives, a functional testing device for the over-temperature protection unit of a high-speed train battery includes:

[0007] The main housing includes a female connector located on the lower surface of the main housing and interlocking with the battery terminals; the female connector has an insertion hole.

[0008] The main housing includes a built-in power supply battery and a main control circuit board; the main control circuit board includes a resistance measurement unit for internal temperature measuring resistors R1 and R7, a consistency measurement unit for comparing the electrical difference between temperature measuring resistors R1 and R7, a trigger characteristic detection unit for simulating high temperature signals to excite and detect the over-temperature protection trigger function of the battery, and a main controller; the main control circuit board is connected to the plug-in female electrical connector.

[0009] Preferably, the connector includes a built-in electrical spring to ensure stable electrical contact with the connector terminal.

[0010] Preferably, a plug-in handle is fixed to the side wall of the main housing.

[0011] Preferably, the top surface of the main housing is provided with a status indicator light or a display showing the resistance value and consistency error, which is electrically connected to the main controller.

[0012] Preferably, the resistance measuring unit includes:

[0013] Controllable resistors R2 and R8 are connected in parallel with temperature measuring resistors R1 and R7 inside the battery, respectively; ammeters are connected to the input terminals of temperature measuring resistors R1 and R7; the output terminals of the two ammeters output current signals respectively and are connected to AD1 and AD2 of the main controller.

[0014] The input terminals of the two ammeters are respectively connected to controllable power supplies VCCCtrl1 and VCCCtrl2, and the output terminals of the temperature measuring resistors R1 and R7 are grounded.

[0015] Preferably, the consistency measurement unit includes:

[0016] A voltage follower is connected to the input terminals of temperature measuring resistors R1 and R7 respectively. The output terminals of the two voltage followers are connected to a differential pressure detector. The output terminal of the differential pressure detector outputs the differential pressure value of the input terminals of temperature measuring resistors R1 and R7 and is connected to AD3 of the main controller.

[0017] The voltage follower includes operational amplifiers U1 and U3, and filter capacitors C1, C2, C3, and C4; the input terminals of temperature sensing resistors R1 and R7 are respectively connected to the non-inverting input terminals of operational amplifiers U1 and U3, and the inverting input terminals of operational amplifiers U1 and U3 are both fed back to the output terminals.

[0018] Preferably, the differential pressure detector includes:

[0019] External resistors R4 and R5 are connected to the output terminals of operational amplifiers U1 and U3 respectively. External resistor R3 is connected between the inverting input terminal and the output terminal of operational amplifier U2. External resistor R6 is connected between the non-inverting input terminal and ground of operational amplifier U2. The output terminals of external resistors R4 and R5 are connected to the non-inverting input terminal and the inverting input terminal of operational amplifier U2 respectively.

[0020] Preferably, the trigger characteristic detection unit includes:

[0021] An electronic switch S1 is located between the input terminal of the temperature measuring resistor R1 and its internal lead-in terminal Net5 of the battery; an electronic switch S2 is located between the input terminal of the temperature measuring resistor R7 and its internal lead-in terminal Net6 of the battery.

[0022] In summary, compared with the prior art, the above-described technical solution conceived by this utility model can achieve the following beneficial effects:

[0023] This invention relates to a functional testing device for the over-temperature protection unit of a high-speed train battery. It employs a resistance measurement unit to measure the resistance of temperature-sensing resistors at room temperature and a consistency measurement unit to measure the difference between two temperature-sensing resistors, thus providing a preliminary indication of the measurement function's effectiveness. A trigger characteristic testing unit is constructed using parallel resistors to simulate a high-temperature state, thereby testing the switch controllability within the battery. This invention comprehensively evaluates the measurement and control functionality of the over-temperature protection unit within the battery, overcoming the technical shortcomings of traditional methods that rely on directly disconnecting the temperature-sensing resistors for triggerability testing, which fails to assess the effectiveness of the temperature-sensing resistors and the control signal. This ensures the safe operation of the train. Attached Figure Description

[0024] Figure 1 This is a schematic diagram illustrating the usage status of a testing and control function detection device for an over-temperature protection unit of a high-speed train battery according to an embodiment of this utility model.

[0025] Figure 2 This is a schematic diagram of the overall structure of a testing and control function detection device for an over-temperature protection unit of a high-speed train battery according to an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the detection circuit structure of a detection device for the over-temperature protection unit of a high-speed train battery according to an embodiment of the present invention;

[0027] In all the accompanying drawings, the same reference numerals indicate the same technical features, specifically: 1-main housing, 101-power supply battery, 102-display, 103-main control circuit board, 104-plug handle, 2-plug female socket, 201-plug hole, 202-electrical spring, 3-battery, 301-plug hole, 302-plug terminal. Detailed Implementation

[0028] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0032] like Figures 1-3 As shown in this embodiment of the utility model, the functional testing device for the over-temperature protection unit of a high-speed train battery includes:

[0033] The main housing 1 and the plug-in female socket 2 located on the lower surface of the main housing 1 and interlocking with the plug-in terminal 302 of the battery 3; the plug-in female socket 2 is provided with a plug-in hole 201;

[0034] The main housing 1 includes a built-in power supply battery 101 and a main control circuit board 103. The main control circuit board 103 includes a resistance measurement unit for measuring the resistance values ​​of temperature measuring resistors R1 and R7 inside the battery 3, a consistency measurement unit for comparing the electrical differences between temperature measuring resistors R1 and R7, a trigger characteristic detection unit for simulating high-temperature signals to excite and detect the over-temperature protection trigger function of the battery, and a main controller. The main control circuit board 103 is electrically connected to the plug-in female connector 2.

[0035] like Figure 1 and Figure 2 As shown in this embodiment of the utility model, the plug-in female socket 2 has a built-in electric connecting spring 202 to ensure stable electrical contact with the plug-in terminal 302.

[0036] like Figure 1 and Figure 2 As shown in this embodiment of the present invention, a plug-in handle 104 is fixed to the side wall of the main housing 1.

[0037] like Figure 1 and Figure 2 As shown in this embodiment of the present invention, the top surface of the main housing 1 is provided with a status indicator light or a display 102 that displays resistance value and consistency error, which is electrically connected to the main controller.

[0038] like Figure 3 As shown in this embodiment of the invention, the resistance measuring unit includes:

[0039] Controllable resistors R2 and R8 are connected in parallel with temperature measuring resistors R1 and R7 inside the battery, respectively; ammeters are connected to the input terminals of temperature measuring resistors R1 and R7; the output terminals of the two ammeters output current signals respectively and are connected to AD1 and AD2 of the main controller.

[0040] The input terminals of the two ammeters are respectively connected to controllable power supplies VCCCtrl1 and VCCCtrl2, and the output terminals of the temperature measuring resistors R1 and R7 are grounded.

[0041] like Figure 3 As shown in this embodiment of the invention, the consistency measurement unit includes:

[0042] A voltage follower is connected to the input terminals of temperature measuring resistors R1 and R7 respectively. The output terminals of the two voltage followers are connected to a differential pressure detector. The output terminal of the differential pressure detector outputs the differential pressure value of the input terminals of temperature measuring resistors R1 and R7 and is connected to AD3 of the main controller.

[0043] The voltage follower includes operational amplifiers U1 and U3, and filter capacitors C1, C2, C3, and C4; the input terminals of temperature sensing resistors R1 and R7 are respectively connected to the non-inverting input terminals of operational amplifiers U1 and U3, and the inverting input terminals of operational amplifiers U1 and U3 are both fed back to the output terminals.

[0044] like Figure 3 As shown in this embodiment of the invention, the differential pressure detector includes:

[0045] External resistors R4 and R5 are connected to the output terminals of operational amplifiers U1 and U3 respectively. External resistor R3 is connected between the inverting input terminal and the output terminal of operational amplifier U2. External resistor R6 is connected between the non-inverting input terminal and ground of operational amplifier U2. The output terminals of external resistors R4 and R5 are connected to the non-inverting input terminal and the inverting input terminal of operational amplifier U2 respectively.

[0046] like Figure 3 As shown in this embodiment of the invention, the trigger characteristic detection unit includes:

[0047] An electronic switch S1 is located between the input terminal of the temperature measuring resistor R1 and its internal lead-in terminal Net5 of the battery; an electronic switch S2 is located between the input terminal of the temperature measuring resistor R7 and its internal lead-in terminal Net6 of the battery.

[0048] Working principle of this utility model embodiment:

[0049] S100: First, hold the plug handle 104 and plug the present invention into the plug hole 301 of the battery to ensure that the plug hole 201 and the plug terminal 302 are electrically connected well, thereby completing the docking and connection of the Net1, Net2, Net3, Net4, Net5 and Net6 terminals.

[0050] S200: To start this utility model, first test the resistance values ​​of resistors R1 and R7 at room temperature. Control S1 and S2 to disconnect, control power supply to VCCCtrl1 and VCCCtrl2, then control the resistance values ​​of R2 and R8 to be fixed, and read the feedback parameters of AD1 and AD2, and read the main circuit current values ​​I1 and I2, using the formula:

[0051] R1=R2*VCCCtrl1 / (R2*I1-VCCCtrl1)

[0052] R7=R8*VCCCtrl2 / (R8*I2-VCCCtrl2)

[0053] The resistance values ​​of two temperature measuring resistors R1 and R7 of the battery at room temperature are obtained. The error between the actual value and the theoretical value is compared by the main controller to determine the resistance performance.

[0054] S300: Performs consistency error test on resistors R1 and R7. Under the action of voltage follower, it obtains the input potential of resistors R1 and R7 and prevents the original circuit from being affected. Then, the differential amplifier composed of U2 calculates the difference between the two potentials and outputs the difference value. The consistency error value can be obtained by reading AD3 through the main controller. The closer this value is to 0, the more effective the two resistors are.

[0055] S400: After checking the resistance and consistency error characteristics, the trigger characteristic test can be performed. First, the power is turned off at VCCCtrl1 and VCCCtrl2, and S1 and S2 are closed. Under the parallel action of R1 and R2, R7 and R8, the overall resistance decreases. By controlling and changing R2 and R8, the effect of the resistance change of the temperature sensing resistor after being affected by temperature is simulated. By adjusting the resistance values ​​of R2 and R8, the high temperature resistance value is simulated to observe the switch-off state inside the battery. If it is off, it proves that the trigger characteristic is good.

[0056] In this embodiment of the invention, the resistance of the temperature-sensing resistors at room temperature is measured by a resistance measurement unit, and the difference between the two temperature-sensing resistors is measured by a consistency measurement unit to preliminarily demonstrate the effectiveness of the measurement function. A trigger characteristic detection unit is constructed by connecting resistors in parallel to simulate a high-temperature state and to detect the controllability of the switch inside the battery. This invention can comprehensively evaluate the measurement and control functionality of the over-temperature protection unit inside the battery, and solves the technical defect of the traditional method of directly disconnecting the temperature-sensing resistor for triggerability detection of switch control, which cannot detect the effectiveness of the temperature-sensing resistor and the effectiveness of the control signal, thus ensuring the safe operation of the train.

[0057] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A functional testing device for the over-temperature protection unit of a high-speed train battery, characterized in that, include: The main housing (1) and the plug-in female socket (2) located on the lower surface of the main housing (1) and interlocking with the plug-in terminal (302) of the battery (3); the plug-in female socket (2) is provided with a plug-in hole (201); The main housing (1) includes a built-in power supply battery (101) and a main control circuit board (103); the main control circuit board (103) includes a resistance measurement unit for measuring the resistance values ​​of temperature measuring resistors R1 and R7 inside the battery (3), a consistency measurement unit for comparing the electrical difference between temperature measuring resistors R1 and R7, a trigger characteristic detection unit for simulating high temperature signals to excite and detect the over-temperature protection trigger function of the battery, and a main controller; the main control circuit board (103) is electrically connected to the plug-in female socket (2).

2. The testing device for the over-temperature protection unit of a high-speed train battery according to claim 1, characterized in that, include: The plug-in female socket (2) has a built-in electric spring (202) to ensure stable electrical contact with the plug-in terminal (302).

3. The functional testing device for the over-temperature protection unit of a high-speed train battery according to claim 1, characterized in that, The main housing (1) has a plug handle (104) fixed to its side wall.

4. The device for testing and controlling the over-temperature protection unit of a high-speed train battery according to claim 1, characterized in that, The top surface of the main housing (1) is provided with a status indicator light or a display (102) that displays resistance value and consistency error, which is electrically connected to the main controller.

5. The functional testing device for the over-temperature protection unit of a high-speed train battery according to claim 1, characterized in that, The resistance measurement unit includes: Controllable resistors R2 and R8 are connected in parallel with temperature measuring resistors R1 and R7 inside the battery, respectively; ammeters are connected to the input terminals of temperature measuring resistors R1 and R7; the output terminals of the two ammeters output current signals respectively and are connected to AD1 and AD2 of the main controller. The input terminals of the two ammeters are respectively connected to controllable power supplies VCCCtrl1 and VCCCtrl2, and the output terminals of the temperature measuring resistors R1 and R7 are grounded.

6. The functional testing device for the over-temperature protection unit of a high-speed train battery according to claim 5, characterized in that, The consistency measurement unit includes: A voltage follower is connected to the input terminals of temperature measuring resistors R1 and R7 respectively. The output terminals of the two voltage followers are connected to a differential pressure detector. The output terminal of the differential pressure detector outputs the differential pressure value of the input terminals of temperature measuring resistors R1 and R7 and is connected to AD3 of the main controller. The voltage follower includes operational amplifiers U1 and U3, and filter capacitors C1, C2, C3, and C4; the input terminals of temperature sensing resistors R1 and R7 are respectively connected to the non-inverting input terminals of operational amplifiers U1 and U3, and the inverting input terminals of operational amplifiers U1 and U3 are both fed back to the output terminals.

7. The testing device for the over-temperature protection unit of a high-speed train battery according to claim 6, characterized in that, The differential pressure detector includes: External resistors R4 and R5 are connected to the output terminals of operational amplifiers U1 and U3 respectively. External resistor R3 is connected between the inverting input terminal and the output terminal of operational amplifier U2. External resistor R6 is connected between the non-inverting input terminal and ground of operational amplifier U2. The output terminals of external resistors R4 and R5 are connected to the non-inverting input terminal and the inverting input terminal of operational amplifier U2 respectively.

8. The functional testing device for the over-temperature protection unit of a high-speed train battery according to claim 7, characterized in that, The trigger characteristic detection unit includes: An electronic switch S1 is located between the input terminal of the temperature measuring resistor R1 and its internal battery lead Net5; an electronic switch S2 is located between the input terminal of the temperature measuring resistor R7 and its internal battery lead Net6.

Images