Anti-condensation liquid detection sensor

Abstract

The utility model relates to an anti-condensation liquid detection sensor which comprises a shell, a test electrode, a PCB (Printed Circuit Board), a lead and a terminal, wherein the test electrode and the PCB are regularly arranged in the shell; and the lead and the terminal are used for leading out the test electrode. According to the anti-condensation liquid detection sensor disclosed by the utility model, the vertical rib which protrudes upwards is arranged between the two metal electrode insertion sheets, and the vertical rib separates the root parts of the first test electrode and the second test electrode which are positioned in the test cavity, so that a water line or a water path which is possibly formed due to condensation aggregation is separated; the length of the waterway which may cause false alarm is increased, so that false alarm signals are avoided or reduced. Meanwhile, a hydrophobic layer is arranged on the surface of the inner wall of the test cavity of the shell or the surface is subjected to smooth treatment, so that the tension of water on the surface is reduced, and condensed water is not easy to form a continuous water path.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid leakage detection sensors, in particular to an anti-condensation liquid detection 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] However, in a high humidity environment with condensation, the condensation will gather and converge to form a continuous water line or waterway between the two metal plug electrodes of the sensor, thereby connecting the two metal plugs and forming a false alarm signal. In addition, the existing liquid detection sensor is located on the inner surface of the test cavity, and condensation is easy to converge and gather on its surface to form a continuous waterway. Utility Model Content

[0004] The technical problem solved by the utility model is to provide an anti-condensation liquid detection sensor.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A condensation-proof liquid detection sensor comprises a housing, test electrodes and a PCB board regularly arranged in the housing, and wires and terminals leading out the test electrodes;

[0007] The shell is a tubular shell, and the interior is divided into two parts by a horizontally arranged partition, a test cavity is formed above the partition, and a wiring cavity is formed below the partition;

[0008] The test electrode comprises a first test electrode and a second test electrode arranged in parallel, the test electrode passes through the partition and is fixedly connected thereto, the front end of the test electrode extends into the test cavity to form a test end, and the rear end of the test electrode extends into the wiring cavity to form a wiring end;

[0009] A vertical rib protruding upward is provided at the bottom end of the test cavity between the first test electrode and the second test electrode, and the vertical rib separates the root portion of the first test electrode from the root portion of the second test electrode;

[0010] The wiring terminal at the rear end of the test electrode is connected to the PCB board and is electrically connected through leads and chip resistors regularly arranged on the PCB board; the wiring terminal at the rear end of the test electrode is also electrically connected to the terminal through the wire.

[0011] Furthermore, the inner wall of the test cavity is provided with a hydrophobic layer.

[0012] Furthermore, guide columns are vertically arranged on the front and rear inner walls of the wiring cavity, and guide column slots are regularly arranged on the front and rear sides of the PCB board at the positions of the guide columns. The PCB board is quickly inserted into the wiring cavity along the guide columns through the guide column slots and is electrically connected to the rear end of the test electrode.

[0013] Furthermore, the bottom of the shell extends outward to form a base for easy installation and fixing.

[0014] Furthermore, the base is regularly provided with fixing holes for fasteners to pass through and fix, and positioning columns for fast insertion into corresponding modules to achieve fast positioning.

[0015] Furthermore, protruding elastic buckles are regularly arranged on the left and right sides of the terminal.

[0016] The beneficial effects of the utility model are:

[0017] 1. The anti-condensation liquid detection sensor of the utility model has an upwardly protruding vertical rib between two metal electrode plugs, which separates the root of the first test electrode and the second test electrode located in the test cavity, thereby isolating the waterline or waterway that may be formed due to the accumulation of condensation, increasing the length of the waterway that may cause false alarms, so as to avoid or reduce false alarm signals.

[0018] 2. The anti-condensation liquid detection sensor of the utility model provides a hydrophobic layer on the inner wall surface of the shell test cavity or performs a smooth surface treatment to reduce the water tension on the surface, so that condensation water is not easy to form a continuous water path. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0020] Figure 2 for Figure 1 Side view of part of the structure;

[0021] Figure 3 for Figure 2 The cutaway stereogram in the middle AA direction;

[0022] Figure 4 This is the working principle diagram of the sensor of the utility model;

[0023] The markings in the figure are:

[0024] 1. Shell, 2. Test electrode, 3. Wire, 4. Terminal, 5. PCB board;

[0025] 11. base, 1101. fixing hole, 1102. positioning column;

[0026] 12. partition, 101. test cavity, 102. wiring cavity, 1011. vertical rib, 1021. guide column;

[0027] 21. a first test electrode, 22. a second test electrode;

[0028] 401. Elastic buckle. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] like Figure 1-4 As shown, the utility model provides an anti-condensation liquid detection sensor, comprising a housing 1, a test electrode 2, a wire 3, a terminal 4 and a PCB board 5.

[0032] Among them, Figure 3 As shown, the housing 1 is a tubular housing and is divided into two parts by a horizontally arranged partition 12 , so that a test cavity 101 is formed above the partition 12 and a wiring cavity 102 is formed below the partition.

[0033] Furthermore, the test electrode 2 passes through the partition 12 and is fixedly connected to the partition. The front end of the test electrode extends into the test cavity 101 to form a test end, and the rear end thereof extends into the wiring cavity 102 to form a wiring end.

[0034] Further, such as Figure 3 and Figure 4As shown, the test electrode 2 includes two metal electrode inserts arranged in parallel, namely a first test electrode 21 and a second test electrode 22. The first test electrode 21 and the second test electrode 22 are fixed on the left and right sides of the partition 12. When liquid enters the test cavity 101, the excess liquid will conduct the first test electrode and the second test electrode, forming a resistance Rt therebetween, so that liquid leakage can be detected.

[0035] Furthermore, the rear end terminals of the first test electrode 21 and the second test electrode 22 are electrically connected to the PCB board 5, and are electrically connected through leads and chip resistors regularly arranged on the PCB board, and the chip resistor serves as the resistor R0 between the first test electrode 21 and the second test electrode 22.

[0036] Furthermore, in order to facilitate the rapid installation of the PCB board 5 into the wiring cavity 102 and to electrically connect the wiring terminal at the rear end of the test electrode, guide posts 1021 are vertically arranged on the front and rear inner walls of the wiring cavity 102, and correspondingly, guide post slots are regularly arranged at the positions of the guide posts 1021 on the front and rear sides of the PCB board 5, so that the PCB board 5 can be quickly inserted into the wiring cavity along the guide posts 1021 in the wiring cavity through the cooperation of the guide posts and the guide post slots, and connected to the rear end of the test electrode.

[0037] Furthermore, after the PCB board 5 and the wiring terminal at the rear end of the test electrode are electrically connected together, the PCB board in the wiring cavity and the wiring terminal at the rear end of the test electrode are sealed by injecting glue into the wiring cavity.

[0038] In a high humidity environment with condensation, the inner wall of the test cavity may form a continuous waterline or waterway between the first test electrode 21 and the second test electrode 22 due to the gathering and convergence of condensation, thereby connecting the two test electrodes and forming a false alarm signal.

[0039] Therefore, in order to avoid the above situation. Figure 3 As shown, an upwardly protruding vertical rib 1011 is provided between the first test electrode 21 and the second test electrode 22 in the test cavity 101. The vertical rib 1011 separates the root of the first test electrode and the second test electrode in the test cavity, thereby isolating the waterline or waterway that may be formed due to the accumulation of condensation, increasing the length of the waterway that may cause false alarms, so as to avoid or reduce false alarm signals.

[0040] Furthermore, the inner wall surface of the test cavity 101 is provided with a hydrophobic coating or is smoothed to reduce the tension of water on its surface so that condensation is not easy to form a continuous water path.

[0041] like Figure 1As shown, in order to facilitate the assembly of the sensor of the utility model into the corresponding module of the automobile, the bottom of the housing 1 extends outward to form a base 11. The base 11 is regularly provided with fixing holes 1101 for fasteners such as bolts to pass through and fixing it, and positioning columns 1102 for quick insertion into the corresponding module to achieve quick positioning.

[0042] Further, in order to facilitate the rapid networking of the anti-condensation liquid detection sensor of the utility model, the rear end of the wire 3 is electrically connected to the terminal 4. The left and right sides of the terminal 4 are provided with elastic buckles 401 that are fixedly engaged with the interface on the main control module, and the elastic buckle 401 is an elastic buckle protruding outward.

[0043] like Figure 4 As shown in the figure, it is a working principle diagram of an anti-condensation liquid detection sensor of the utility model, and the specific working principle is as follows:

[0044] The anti-condensation liquid detection 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) 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.

[0045] 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. A liquid detection sensor for preventing condensation, characterized in that: It comprises a housing, test electrodes and a PCB board regularly arranged in the housing, and wires and terminals leading out the test electrodes; The shell is a tubular shell, and the interior is divided into two parts by a horizontally arranged partition, a test cavity is formed above the partition, and a wiring cavity is formed below the partition; The test electrode comprises a first test electrode and a second test electrode arranged in parallel, the test electrode passes through the partition and is fixedly connected thereto, the front end of the test electrode extends into the test cavity to form a test end, and the rear end of the test electrode extends into the wiring cavity to form a wiring end; A vertical rib protruding upward is provided at the bottom end of the test cavity between the first test electrode and the second test electrode, and the vertical rib separates the root portion of the first test electrode from the root portion of the second test electrode; The wiring terminal at the rear end of the test electrode is connected to the PCB board and is electrically connected through leads and chip resistors regularly arranged on the PCB board; the wiring terminal at the rear end of the test electrode is also electrically connected to the terminal through the wire.

2. The anti-condensation liquid detection sensor according to claim 1, characterized in that: A hydrophobic layer is arranged on the inner wall of the test cavity.

3. The anti-condensation liquid detection sensor according to claim 2, characterized in that: Guide columns are vertically arranged on the front and rear inner walls of the wiring cavity, and guide column slots are regularly arranged on the front and rear sides of the PCB board at the positions of the guide columns. The PCB board is quickly inserted into the wiring cavity along the guide columns through the guide column slots and is electrically connected to the rear end of the test electrode.

4. The anti-condensation liquid detection sensor according to any one of claims 1 to 3, characterized in that: The bottom of the shell extends outward to form a base for easy installation and fixing.

5. The anti-condensation liquid detection sensor according to claim 4, characterized in that: The base is regularly provided with fixing holes for fasteners to pass through and fix the base, and positioning columns for fast insertion into corresponding modules to achieve fast positioning.

6. The anti-condensation liquid detection sensor according to claim 5, characterized in that: The left and right sides of the terminal are regularly provided with protruding elastic buckles.

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