Array type liquid leakage monitoring sensor

Abstract

The utility model relates to an array type liquid leakage monitoring sensor which comprises a main control module and a plurality of liquid leakage monitoring sensors which are electrically connected with independent quick plugs through independent sensor wires. And the plurality of liquid leakage monitoring sensors are inserted into a plurality of plug hole positions at the front end of the main control module through independent quick plugs to realize electrical connection with the main control module. According to the array type liquid leakage monitoring sensor provided by the utility model, more liquid leakage monitoring sensors are integrated through the main control module, so that the measurement coverage area can be greatly increased. And then, data of each single-point sensor is uniformly collected and analyzed through the microprocessor MCU, and is externally connected to a corresponding automobile module through a cable, and the correspondingly analyzed data is fed back to the battery pack management system, so that the battery pack management system can be simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid leakage detection sensors, in particular to an array type liquid leakage monitoring sensor. Background Art

[0002] With the popularity of electric vehicles, there are more and more cases of battery pack leakage or water ingress in electric vehicles, which may cause the battery pack to catch fire in serious cases. The battery pack leakage sensor can quickly identify leakage or water ingress in the battery pack. When the battery pack leaks or water ingress exceeds 1mm, the sensor will send an alarm signal to the battery pack management module.

[0003] Existing leakage sensors are generally installed separately in the corresponding modules of the car. Then they are electrically connected to the corresponding car control module through relatively long wires. In this mode, the wires required are relatively long, and the wiring in the car is relatively complicated.

[0004] To this end, we propose an array liquid leakage sensor, which consists of a separate main control processing module and N single-point measurement liquid leakage sensors. The single-point sensor has a small measurement area, and by integrating more sensors in the processing module, the measurement coverage area can be greatly increased. It can also centrally process data and simplify the battery pack management system. Utility Model Content

[0005] The technical problem solved by the utility model is to provide an array type liquid leakage monitoring sensor integrating a plurality of liquid leakage monitoring sensors.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] An array type liquid leakage monitoring sensor comprises a main control module and a plurality of liquid leakage monitoring sensors, wherein the plurality of liquid leakage monitoring sensors are electrically connected to independent quick plugs via independent sensor wires, and the plurality of liquid leakage monitoring sensors are inserted into a plurality of plug holes at the front end of the main control module via the independent quick plugs to achieve electrical connection with the main control module.

[0008] Furthermore, the main control module includes a main control shell and a main control PCB board, and the front and rear ends of the main control shell are respectively provided with a number of plug holes and interface holes; the number of plug holes are used to connect the quick plugs, and are regularly arranged at the front end of the main control shell, and a number of plug pins are regularly arranged inside; the interface hole is used to connect the cable connector, and is arranged at the rear end of the main control shell, and a number of interface pins are regularly arranged inside; one end of the plug pin is arranged in the plug hole, and the other end thereof is welded and electrically connected to the front end of the main control PCB board as a data acquisition end; one end of the number of interface pins is arranged in the interface hole, and the other end thereof is welded and electrically connected to the rear end of the main control PCB board as a data output end.

[0009] Furthermore, an anti-drop structure is provided between the quick plug and the plug hole of the main control housing.

[0010] Furthermore, the anti-drop structure adopts a snap-on and bayonet combination, the inner wall of the plug hole is regularly provided with a raised snap-on structure, and the corresponding position on the outer side of the quick plug is regularly provided with a recessed bayonet structure, and the quick plug and the plug hole are quickly connected and fixed by snap-fitting.

[0011] Furthermore, the outer side of the main control housing is also regularly provided with a main control foot for easy installation, and the main control foot is provided with a main control housing fixing hole for convenient passage of fasteners such as bolts to fix it.

[0012] Furthermore, a single liquid leakage monitoring sensor includes a sensor housing, and a test electrode, a circuit board and a chip resistor are regularly arranged inside the sensor housing; the sensor housing includes a sensor housing shell, and the sensor housing shell is a hollow cylinder, and its internal cavity is divided into two parts through an upper and lower partition, forming an independent test cavity and a wiring cavity respectively; the test electrode passes through the partition and is fixed thereto, and the front end of the test electrode is a test end, which extends into the test cavity, and the rear end of the test electrode is a wiring terminal, which extends into the wiring cavity; the chip resistor is regularly welded on the circuit board and electrically connected to the test electrode through the lead printed on the circuit board, serving as a fixed resistor between the test electrodes; through-hole pads that cooperate with the test electrode are regularly arranged on the circuit board, and are welded and electrically connected to them in the wiring cavity; the wire is electrically connected to the circuit board, and is led out of the wiring cavity and connected to the quick plug, and the wire is electrically connected to the test electrode through the lead on the circuit board.

[0013] Furthermore, the test electrode includes a first test electrode and a second test electrode, the wire includes a first wire and a second wire, and the first wire and the second wire are electrically connected to the first test electrode and the second test electrode respectively through independent leads on the circuit board.

[0014] Furthermore, protruding guide columns are regularly arranged on the inner walls on both sides of the wiring cavity, and inwardly recessed guide grooves are regularly arranged on the two side edges at the corresponding positions of the circuit board. The circuit board is quickly positioned and assembled into the wiring cavity through the guide grooves and the guide columns, and is electrically connected to the test end at the rear end of the test electrode.

[0015] Furthermore, the sensor housing also includes a sensor base, and the sensor base is regularly provided with base fixing holes for fasteners such as bolts to pass through and fix the sensor base.

[0016] Furthermore, the sensor base is also provided with a positioning column for quick insertion to achieve positioning.

[0017] The beneficial effects of the utility model are:

[0018] 1. The array-type liquid leakage monitoring sensor of the utility model can greatly increase the measurement coverage area by integrating more liquid leakage monitoring sensors through the main control module. Several liquid leakage monitoring sensors and the main control module form the array-type liquid leakage sensor of the utility model, which can centrally process data. The data of each single-point sensor is uniformly collected / collected and analyzed through the microprocessor MCU, and then connected to the corresponding automotive module through a cable, and the corresponding analyzed data (including the specific leakage location and leakage degree) is fed back to the battery pack management system, thereby simplifying the battery pack management system.

[0019] 2. The array type liquid leakage monitoring sensor of the utility model realizes the quick plugging and unplugging of a single sensor through a quick plug, thereby facilitating the quick assembly and maintenance of the array type sensor. Moreover, an anti-drop structure is provided between the quick plug and the plug hole on the main control housing, thereby realizing the staggered stop after the combination, which can prevent the plug from falling out due to vibration, and when it is pulled out, it can be disengaged by increasing the pulling force or releasing the elastic mechanism.

[0020] 3. The array type liquid leakage monitoring sensor of the utility model adopts the design of connecting the test electrode plate with the circuit board. Before assembly, the chip resistors and wires are installed first, and then the whole is welded with the test electrode plate, which greatly reduces the difficulty of assembly and the manufacturing cost. And under the same precision conditions, the cost of chip resistors is lower, which is conducive to reducing manufacturing costs. At the same time, the chip resistors are smaller in size, and after the encapsulating epoxy glue is cured, they are less likely to deform under hot and cold shocks, so that the resistance value is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the utility model;

[0022] Figure 2 for Figure 1 The structural diagram of the main control module;

[0023] Figure 3 for Figure 2 Front view of

[0024] Figure 4 for Figure 3 Sectional view in the AA direction;

[0025] Figure 5 for Figure 1 The structural diagram of a single liquid leakage monitoring sensor;

[0026] Figure 6 for Figure 5 Bottom view of

[0027] Figure 7 for Figure 5 Stereoscopic view of

[0028] Figure 8 This is a working principle diagram of a single liquid leakage monitoring sensor of the utility model;

[0029] The markings in the figure are:

[0030] 1. Liquid leakage monitoring sensor, 2. Wire, 3. Quick plug, 4. Main control module;

[0031] 101 sensor housing, 102 sensor base, 103 partition, 104 guide column, 1011 test cavity, 1012 wiring cavity, 1021 through hole, 1022 positioning column;

[0032] 12. a test electrode, 121. a first test electrode, 122. a second test electrode;

[0033] 13. Circuit board, 1301, guide notch, 14. Chip resistor;

[0034] 41. Main control housing, 42. Main control foot, 43. Plug pin, 44. Main control PCB, 45. Interface pin;

[0035] 4101, plug hole, 4102, interface hole, 4103, buckle, 4201, main control shell fixing hole. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0038] like Figure 1-7 As shown, the utility model provides an array type liquid leakage monitoring sensor, including a main control module 4 and a plurality of liquid leakage monitoring sensors 1, wherein the plurality of liquid leakage monitoring sensors 1 are electrically connected to independent quick plugs 3 through independent sensor wires 2, and the plurality of liquid leakage monitoring sensors 1 are quickly inserted into a plurality of plug holes 4101 at the front end of the main control module 4 through the independent quick plugs 3 to achieve electrical connection with the main control module 4, and constitute the array type liquid leakage monitoring sensor of the utility model.

[0039] like Figure 2-4 As shown, the main control module 4 includes a main control housing 41, and a plurality of plug holes 4101 and interface holes 4102 are respectively provided at the front and rear ends of the main control housing 41. Among them, the plurality of plug holes 4101 are used to connect the quick plug 3, and are regularly arranged at the front end of the main control housing 41, and a plurality of plug pins 43 are regularly arranged inside. The interface holes 4102 are used to connect the cable connector, and are arranged at the rear end of the main control housing 41, and a plurality of interface pins 45 are regularly arranged inside.

[0040] Furthermore, a main control PCB board 44 is arranged and installed inside the main control housing 41, and a main control MCU for array sensor core control, an ADC acquisition unit for data acquisition, a DAC conversion unit for data conversion, and a data interface unit for data transmission are regularly arranged and welded on the main control PCB board 44. Among them, one end of the several plug pins 43 in the above-mentioned several plug holes 4101 is set in the socket hole, and the other end is welded and electrically connected to the main control PCB board as a data acquisition end (or data input end). Correspondingly, one end of the several interface pins 45 in the interface hole 4102 is set in the interface hole, and the other end is welded and electrically connected to the main control PCB board as a data output end.

[0041] Furthermore, the front and rear ends of the quick plug 3 are respectively provided with a socket for facilitating the insertion of the plug pin 43 and a wire installation hole for facilitating the arrangement and installation of the wire 2. An inner conductor or inner core is provided between the sockets and the wire installation holes at the front and rear ends of the quick plug 3 to achieve electrical connection.

[0042] Preferably, the plug pin 43 adopts a two-pin design.

[0043] Furthermore, an anti-drop structure is provided between the quick plug 3 and the plug hole 4101 on the main control housing 41, so as to achieve staggered ribs after combination, which can prevent the plug from falling out due to vibration, and the plug can be disengaged by increasing the pulling force or releasing the elastic mechanism when being pulled out.

[0044] Preferably, Figure 4 As shown, a raised buckle structure is regularly arranged in the plug hole 4101. Correspondingly, a recessed bayonet structure is regularly arranged at the corresponding position of the quick plug 3, so that the quick connection and fixation of the quick plug and the plug hole can be achieved through snap fit.

[0045] like Figure 2 As shown, the outer side of the main control housing 41 is also regularly provided with a main control foot 42 for easy installation, and the main control housing fixing hole 4201 is provided on the main control foot 42, so that the main control module can be conveniently fixed at a designated position of the car by passing fasteners such as bolts through the main control housing fixing hole 4201.

[0046] like Figure 5-7 As shown, it is a specific structural diagram of a single liquid leakage monitoring sensor, including a sensor housing 101, and a test electrode 12, a circuit board 13 and a chip resistor 14 regularly arranged inside the sensor housing.

[0047] The sensor housing 101 includes a sensor housing shell, which is a hollow shell, and its internal cavity is divided into two parts through the partition 103, forming a test cavity 1011 and a wiring cavity 1012. The test electrode 12 includes a first test electrode 121 and a second test electrode 122. The test electrode 12 passes through the partition 103 and is fixed thereto, and is arranged parallel to and fixed in the partition. The front end of the test electrode 12 is a test end, which extends into the test cavity 1011; the rear end is a wiring end, which extends into the wiring cavity 1012.

[0048] Further, the chip resistor 14 is regularly welded and arranged on the circuit board 13, and is electrically connected to the first test electrode and the second test electrode through the lead printed on the circuit board 13, serving as a fixed resistor R0 between the first test electrode and the second test electrode. Through-hole pads matching the test electrode 12 are regularly arranged on the circuit board 13, and are electrically connected to the test electrode 12 by welding in the wiring cavity 1012. The wire 2 includes a first wire 21 and a second wire 22, and the wire 2 is electrically connected to the circuit board 13 and leads out of the wiring cavity 1012.

[0049] Furthermore, the first conductive wire and the second conductive wire are electrically connected to the first test electrode and the second test electrode respectively through leads printed on the circuit board 13 .

[0050] like Figure 5 As shown, the partition 103 is horizontally arranged in the inner cavity of the sensor housing 101. For the horizontally arranged partition 103, the inner cavity of the sensor housing 101 is divided into two parts, forming a test cavity 1011 at the upper end and a wiring cavity 1012 at the lower end. The first test electrode 121 and the second test electrode 122 are regularly arranged in parallel in the inner cavity of the sensor housing 101, and penetrate the partition 103 and are fixed thereto. The front ends of the first test electrode and the second test electrode are test ends, which are arranged in the test cavity 1011; and the rear ends are wiring ends, which are arranged in the wiring cavity 1012.

[0051] Furthermore, through-hole pads are provided on the left and right sides of the circuit board 13 at the rear end terminals of the first test electrode 121 and the second test electrode 122. The circuit board 13 is quickly inserted into the terminals of the first test electrode and the second test electrode through the through-hole pads on the left and right sides, and electrically connected together by welding.

[0052] Furthermore, the first wire 21 and the second wire 22 are regularly and electrically connected to the circuit board 13 .

[0053] The test electrode 12 and the sensor housing 101 can be assembled by integral injection molding, so that when the sensor housing 101 is injection molded, the test electrode 12 is directly assembled into the inner cavity of the sensor housing 101. This also ensures that the test cavity 1011 and the wiring cavity 1012 at the upper and lower ends of the sensor housing 101 are sealed and isolated.

[0054] In order to facilitate the rapid assembly of the circuit board 13 and the test electrode 12, as shown in FIG. Figure 6As shown, guide posts 104 are regularly arranged on the left and right inner walls of the wiring cavity 1012. Correspondingly, guide notches 1301 are arranged at corresponding positions on the left and right sides of the circuit board 13. Through the guide posts 104 on the inner wall of the wiring cavity 1012 and the guide notches 1301 on the circuit board, the circuit board 13 can be quickly assembled into the wiring cavity 1012, and quickly assembled with the test electrode 12 to wait for welding.

[0055] like Figure 6 and Figure 7 As shown, in order to facilitate the assembly of the liquid leakage monitoring sensor of the present invention into the corresponding module of the automobile, a sensor base 102 is further provided at the bottom of the sensor housing 101. The sensor base 102 is regularly provided with base fixing holes 1021 for fasteners such as bolts to pass through and fix it, and positioning columns 1022 for quick insertion into the corresponding module to achieve positioning.

[0056] like Figure 5 As shown, the chip resistor 14 and the wire 2 are first welded together with the circuit board 13, and then the welded circuit board is quickly assembled with the test electrode 12 through the guide column in the wiring cavity 1012, and then welded to complete the preliminary assembly. Finally, the wiring cavity is sealed and packaged by applying glue and curing it inside.

[0057] like Figure 8 As shown, it is a working principle diagram of the liquid leakage monitoring sensor of the utility model. The working principle of a single liquid leakage monitoring sensor of the utility model is as follows:

[0058] The liquid leakage monitoring sensor of the utility model measures the leakage of liquid based on the change in resistance caused by the principle of liquid conductivity. There is a fixed resistor R0 (i.e., chip resistor 14) inside the sensor, which forms a loop together with the external resistor R1. When there is no liquid, the resistance in the loop of the first test electrode PIN1 and the second test electrode PIN2 is fixed; but when there is liquid, the resistance in the loop changes, thereby monitoring whether there is leakage of liquid.

[0059] The measurement area of ​​a single liquid leakage monitoring sensor is small. Therefore, by integrating more liquid leakage monitoring sensors through the main control module, the measurement coverage area can be greatly increased. Several liquid leakage monitoring sensors and the main control module form an array type liquid leakage sensor of this utility model, which can centrally process data, uniformly collect / collect data from each single point sensor through the microprocessor MCU and analyze it, and then connect it to the corresponding automotive module through a cable, and feed back the corresponding analyzed data (including the specific leakage location and leakage degree) to the battery pack management system, thereby simplifying the battery pack management system.

[0060] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An array type liquid leakage monitoring sensor, characterized in that: It includes a main control module and a plurality of liquid leakage monitoring sensors, wherein the plurality of liquid leakage monitoring sensors are electrically connected to independent quick plugs through independent sensor wires, and the plurality of liquid leakage monitoring sensors are inserted into a plurality of plug holes at the front end of the main control module through the independent quick plugs to achieve electrical connection with the main control module.

2. The array type liquid leakage monitoring sensor according to claim 1, characterized in that: The main control module includes a main control shell and a main control PCB board, and the front and rear ends of the main control shell are respectively provided with a plurality of plug holes and interface holes; the plurality of plug holes are used to connect the quick plugs, and are regularly arranged at the front end of the main control shell, and a plurality of plug pins are regularly arranged inside the holes; the interface holes are used to connect the cable connectors, and are arranged at the rear end of the main control shell, and a plurality of interface pins are regularly arranged inside the holes; one end of the plug pin is arranged in the plug hole, and the other end thereof is welded and electrically connected to the front end of the main control PCB board as a data acquisition end; one end of the plurality of interface pins is arranged in the interface hole, and the other end thereof is welded and electrically connected to the rear end of the main control PCB board as a data output end.

3. The array type liquid leakage monitoring sensor according to claim 2, characterized in that: An anti-drop structure is also provided between the quick plug and the plug hole of the main control housing.

4. The array type liquid leakage monitoring sensor according to claim 3, characterized in that: The anti-drop structure adopts a buckle and a bayonet fit, the inner wall of the plug hole is regularly provided with a raised buckle structure, and the corresponding position on the outer side of the quick plug is regularly provided with a recessed bayonet structure, and the quick plug and the plug hole are quickly connected and fixed by a snap fit.

5. The array type liquid leakage monitoring sensor according to claim 2, characterized in that: The outer side of the main control housing is also regularly provided with a main control foot for easy installation, and the main control foot is provided with a main control housing fixing hole for convenient bolts to pass through and fix it.

6. An array type liquid leakage monitoring sensor according to any one of claims 1 to 5, characterized in that: A single liquid leakage monitoring sensor includes a sensor housing, wherein a test electrode, a circuit board and a chip resistor are regularly arranged inside the sensor housing; the sensor housing includes a sensor housing shell, which is a hollow cylinder, and its internal cavity is divided into two parts through an upper and lower partition, forming an independent test cavity and a wiring cavity respectively; the test electrode passes through the partition and is fixed thereto, the front end of the test electrode is a test end, which extends into the test cavity, and the rear end is a wiring terminal, which extends into the wiring cavity; the chip resistor is regularly welded on the circuit board and electrically connected to the test electrode through the lead printed on the circuit board, serving as a fixed resistor between the test electrodes; through-hole pads matching the test electrode are regularly arranged on the circuit board, and are welded and electrically connected thereto in the wiring cavity; the wire is electrically connected to the circuit board, and is led out of the wiring cavity and connected to the quick plug, and the wire is electrically connected to the test electrode through the lead on the circuit board.

7. The array type liquid leakage monitoring sensor according to claim 6, characterized in that: The test electrodes include a first test electrode and a second test electrode, and the wires include a first wire and a second wire, and the first wire and the second wire are electrically connected to the first test electrode and the second test electrode respectively through independent leads on the circuit board.

8. The array type liquid leakage monitoring sensor according to claim 6, characterized in that: Protruding guide columns are regularly arranged on the inner walls on both sides of the wiring cavity, and inwardly recessed guide grooves are regularly arranged on the two side edges at the corresponding positions of the circuit board. The circuit board is quickly positioned and assembled into the wiring cavity through the guide grooves and the guide columns, and is electrically connected to the test end at the rear end of the test electrode.

9. An array type liquid leakage monitoring sensor as claimed in claim 7 or 8, characterized in that: The sensor housing also includes a sensor base, and the sensor base is regularly provided with base fixing holes for convenient bolts to pass through and fix the sensor base.

10. The array type liquid leakage monitoring sensor according to claim 9, characterized in that: The sensor base is also provided with a positioning column for convenient and quick insertion to achieve positioning.

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