Universal waterproof and breathable gas sensor

Abstract

The utility model relates to a universal waterproof breathable gas sensor, which comprises a bottom shell, a sensor chip, a waterproof breathable film, a top cover and a plurality of pins, the upper end of the bottom shell is open, a cavity for loading the sensor chip is arranged in the bottom shell, the sensor chip is fixed in the inner cavity of the bottom shell, the waterproof breathable film seals the opening at the upper end of the bottom shell, and the pins are arranged on the top cover. The sensor chip is sealed in an inner cavity of the bottom shell, the top cover covers the upper end of the bottom shell and is assembled and formed with the bottom shell, and the waterproof breathable film and the sensor chip are packaged in the top cover and the bottom shell. The bottom shell and the top cover are both made of plastic materials, and packaging of other sensor chips is achieved through the plastic bottom shell, the waterproof breathable film and the plastic top cover. Compared with ceramic packaging, the cost is lower, the process is simpler, and the efficiency is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of gas sensors, in particular to a universal waterproof and breathable gas sensor. Background Art

[0002] With the rapid development of electric vehicles, electric vehicles and energy storage power stations should be equipped with battery BMS systems for effective thermal runaway monitoring and early warning. There are many reasons for thermal runaway of power batteries and energy storage batteries. Currently, there is evidence that in the case of thermal runaway caused by external overheating and mechanical collision (including needle puncture), the BMS detects the thermal runaway state (mainly measuring voltage and temperature) later than the gas and pressure monitoring time point.

[0003] Relevant research shows that CO2, CO, H2, C2H4, CH4, C2H6 and C3H6 are the seven most common gases in battery thermal runaway, and there is no correlation between the concentrations of different gases and battery capacity.

[0004] Due to the particularity of the battery pack, the internal chip needs to be waterproof for a long time and resistant to high temperature and humidity. The packaging of existing gas sensors generally includes ceramic packaging, metal packaging and plastic packaging.

[0005] Among them, ceramic packaging is expensive. Integrated chips require larger tube shells, and the price of ceramic tube shells increases exponentially with the size, so the price is very expensive. Metal packaging cannot be chip-based. Plastic packaging EMC can be customized in various sizes, is inexpensive, and has good temperature resistance, but its waterproof performance is average. Utility Model Content

[0006] The technical problem solved by the utility model is to provide a gas sensor which is waterproof, breathable and adaptable to chips of different types.

[0007] The technical solution adopted by the utility model to solve its technical problems is:

[0008] A universal waterproof and breathable gas sensor comprises a bottom shell, a sensor chip, a waterproof and breathable membrane, a top cover and a plurality of pins;

[0009] The upper end of the bottom shell is open, and a chamber for loading the sensor chip is arranged inside the bottom shell. The sensor chip is fixed in the internal chamber of the bottom shell. The waterproof and breathable membrane seals the upper end opening of the bottom shell, and seals the sensor chip in the internal chamber of the bottom shell. The top cover covers the upper end of the bottom shell and is assembled with the top cover, and the waterproof and breathable membrane and the sensor chip are encapsulated in the top cover and the bottom shell.

[0010] The plurality of pins are regularly arranged on both sides of the bottom shell and are integrally injection molded therewith, one end of the plurality of pins is introduced into the internal cavity of the bottom shell for lead wires to form lead pins, and the other end thereof is led out of the bottom of the bottom shell for plug-in or patch to form plug-in pins or patch pins;

[0011] The sensor chip is electrically connected to one end of the lead pin via a lead wire;

[0012] One or more air intake grilles are regularly arranged on the upper end of the top cover, and the air intake grilles include a plurality of air intake holes, and the plurality of air intake holes pass through the upper end of the top cover, and the outside air enters into the internal chamber of the bottom shell through the plurality of air intake holes and the waterproof breathable membrane in turn.

[0013] Furthermore, an upwardly protruding boss is regularly arranged in the inner chamber of the bottom shell, and the boss does not contact the inner wall of the bottom shell, so that a downwardly concave liquid storage tank is formed between the boss and the inner wall of the bottom shell;

[0014] One or more chip slots for loading the sensor chip are regularly arranged on the upper end of the boss, and the sensor chip is installed and fixed in the chip slot;

[0015] One or more first drainage grooves are regularly arranged between the chip card slot and the liquid storage tank, and the chip card slot is connected to the liquid storage tank through the first drainage grooves;

[0016] The lead pins of the plurality of pins are introduced into the upper end of the boss, and second drainage grooves are regularly arranged between adjacent lead pins, and the second drainage grooves are connected to the liquid storage tank.

[0017] Furthermore, the second drainage groove is also connected to the chip card slot and the liquid storage tank.

[0018] Furthermore, the bottom surfaces of the first drainage groove and the second drainage groove are gradually inclined downward from the chip card slot to the liquid storage tank to form a downward slope.

[0019] Furthermore, the upper ends of the lead pins are flush with the upper surface of the sensor chip and are arranged on the same horizontal plane.

[0020] Furthermore, the top cover is snap-fitted and fixed to the upper end of the bottom shell.

[0021] Furthermore, the boss is a trapezoidal column that is narrow at the top and wide at the bottom.

[0022] Furthermore, the outer sides of the left and right side panels or the front and rear side panels of the bottom shell are regularly provided with a number of raised blocks, and the top cover is regularly provided with a number of recessed or through slots at the positions of the blocks; the top cover and the bottom shell are fixed together by the fitting engagement of the slots and the blocks.

[0023] Furthermore, the upper end surface of the bottom shell is regularly provided with a plurality of downwardly recessed fixing holes, and the inside of the top cover at the positions of the plurality of fixing holes is regularly provided with a plurality of protruding fixing bumps, and the plurality of fixing bumps inside the top cover cooperate with the plurality of fixing holes on the upper end surface of the bottom shell to press and fix the waterproof breathable membrane to the upper end of the bottom shell.

[0024] The beneficial effects of the utility model are:

[0025] 1. The bottom shell and top cover of the utility model are made of plastic material, and other sensor chips are packaged through the plastic bottom shell, waterproof breathable membrane and plastic top cover. Compared with ceramic packaging, it has lower cost, simpler process and higher efficiency.

[0026] 2. The utility model can, through the design of the top cover, on the one hand, press the waterproof breathable membrane through the top cover to prevent the waterproof breathable membrane from falling off; on the other hand, it can effectively protect the waterproof breathable membrane to prevent foreign matter from damaging the waterproof breathable membrane.

[0027] 3. The utility model regularly arranges an upwardly protruding boss in the internal chamber of the bottom shell, and forms a downwardly recessed liquid storage tank between the boss and the inside of the bottom shell. A chip card slot is regularly arranged at the upper end of the boss, and one or more drainage grooves are regularly arranged between the chip card slot and the liquid storage tank. The chip card slot and the liquid storage tank are connected by the drainage groove, so as to prevent condensation liquid from flowing to the sensor chip and affecting the detection of the sensor chip.

[0028] 4. The utility model provides drainage grooves regularly between adjacent pins at the upper end of the boss, and the drainage grooves separate adjacent pins on the boss one by one. When condensation is generated on the boss, the condensation can slide down from the drainage grooves and drain into the liquid storage tank in time. This can avoid short circuits between the pins, causing sensor chip failure or affecting the detection of the sensor chip. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is the exploded structure diagram of the utility model;

[0030] Figure 2 for Figure 1 Internal structure diagram of the midsole shell;

[0031] Figure 3 It is a structural diagram of the utility model in the assembled state;

[0032] Figure 4 It is a cross-sectional structural diagram of the utility model;

[0033] The markings in the figure are:

[0034] 1. Bottom shell, 2. Sensor chip, 3. Waterproof and breathable membrane, 4. Top cover, 5. Pins;

[0035] 101, card block, 102, boss, 103, chip card slot, 104, first drainage groove, 105, second drainage groove, 106, liquid storage tank, 107, fixing hole;

[0036] 401, bayonet, 402, air intake grille, 4021, air intake hole;

[0037] 501, lead pin, 502, plug-in pin. DETAILED DESCRIPTION

[0038] 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.

[0039] 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.

[0040] like Figure 1-4 As shown, the utility model provides a universal waterproof and breathable gas sensor, including a bottom shell 1, a sensor chip 2, a waterproof and breathable membrane 3, a top cover 4 and a plurality of pins 5.

[0041] Among them, the upper end of the bottom shell 1 is open, and a chamber is arranged inside it. The sensor chip 2 is fixed in the chamber of the bottom shell 1. The waterproof and breathable membrane 3 seals the upper end opening of the bottom shell 1, thereby sealing the sensor chip 2 in the internal chamber of the bottom shell 1. The top cover 4 covers the upper end of the bottom shell 1 and is assembled with it, thereby encapsulating the waterproof and breathable membrane 3 and the sensor chip 2 in the top cover 4 and the bottom shell 1.

[0042] Furthermore, the bottom shell 1 is regularly provided with an upwardly protruding boss 102, which does not contact the inner wall of the bottom shell 1, so that a downwardly recessed liquid storage tank 106 is formed between the boss and the inner wall of the bottom shell. Among them, the upper end of the boss 102 is regularly provided with one or more chip card slots 103 for loading the sensor chip 2, and the chip card slot 103 is slotted along the shape and size of the specific gas sensor chip.

[0043] Further, such as Figure 2 As shown, one or more first drainage grooves 104 are regularly arranged between the chip card slot 103 and the liquid storage tank 106. When condensation exists on the boss, the condensation will flow into the liquid storage tank 106 along the first drainage grooves 104, thereby preventing the condensation liquid from flowing to the sensor chip 2 and affecting the detection of the sensor chip 2.

[0044] Further, such as Figure 2 As shown, in one embodiment, first drainage grooves 104 are disposed on both the left and right sides of the chip card slot 103 .

[0045] Furthermore, the sensor chip 2 is arranged and installed in the chip card slot 103 at the upper end of the boss 102. In actual operation, after the arrayed gas sensor chip is taped out and cut, it is removed from the wafer by the robot arm suction cup in turn, placed in the chip card slot 103, and pressed with a certain force to ensure that it is completely fitted with the chip card slot 103. The inside of the chip card slot is coated with glue in a fixed position in advance by a glue dispenser. After the gas sensor chip 2 is completely placed in the chip card slot 103, the glue is cured in a high-temperature device to complete the patch work of the sensor chip.

[0046] Furthermore, a plurality of pins 5 are regularly arranged on the left and right sides of the bottom shell 1 and are integrally injection molded therewith, one end of which is introduced into the internal cavity of the bottom shell 1 for lead-in, forming a lead pin 501; the other end is led out from the bottom of the bottom shell 1 for plug-in or patch, forming a plug-in pin 502 or a patch pin.

[0047] Further, such as Figure 2 As shown, the lead pins inside the pin 5 are regularly arranged on the boss 102, and are symmetrically arranged at equal distances along the front and rear sides of the boss 102. The sensor chip 2 connects the pads on the chip with the lead pins through the westband process to achieve electrical conduction.

[0048] Further, such as Figure 2 As shown, the upper end of the lead pin 501 is a lead end. In one embodiment, the lead end is kept horizontal with the upper surface of the sensor chip 2 and is arranged on the same horizontal plane.

[0049] Furthermore, the boss 102 is regularly provided with second drainage grooves 105 between adjacent pins, and the second drainage grooves 105 separate adjacent pins inside the bottom shell 1 one by one. When condensation is generated on the boss 102, the condensation can slide down from the first drainage groove 104 and the second drainage groove 105 in time and drain into the liquid storage tank 106. Thus, short circuits between the pins can be avoided, which may cause sensor chip failure or affect the detection of the sensor chip.

[0050] Further, such as Figure 4 As shown, the bottom surfaces of the first drainage groove 104 and the second drainage groove 105 are both inclined downward to form an inclined surface 1041 , through which the condensation can slide down quickly and be drained into the liquid storage tank 106 .

[0051] Furthermore, a plurality of second drainage grooves 105 are also disposed between the chip card slot 103 and the liquid storage tank 106 and connect them.

[0052] Further, such as Figure 1 and Figure 4 As shown, the waterproof and breathable membrane 3 seals the upper opening of the bottom shell 1, thereby sealing the sensor chip 2 in the internal chamber of the bottom shell 1. The waterproof and breathable membrane 3 is a multi-layer structure, and the materials include but are not limited to PTFE, PP, and PE. This membrane has excellent air permeability, which allows gases such as hydrogen, CO, and CO2 to reach the surface of the gas sensor chip unimpeded to achieve sensing characteristics, and can prevent condensation beads, electrolytes and other liquids in the battery pack from entering the chip surface, thereby causing chip performance to deteriorate or fail. And because of its special hydrophobic and oleophobic properties, the membrane can quickly restore the ventilation function after blocking the liquid.

[0053] In one embodiment, the waterproof breathable membrane 3 and the bottom shell 1 are effectively combined by a hot melt welding process, which is simple to operate and has high firmness, and avoids leakage or falling off problems caused by the gluing process when switching between high and low temperatures.

[0054] Furthermore, in order to improve the reliability of the waterproof breathable membrane 3 and avoid damage to the waterproof breathable membrane as much as possible, the upper end of the waterproof breathable membrane 3 is pressed against the bottom shell 1 through the top cover 4.

[0055] Furthermore, the top cover 4 is fixedly engaged with the upper end of the bottom shell 1. Figure 1 As shown, a plurality of protruding blocks 101 are regularly arranged on the left and right side panels of the bottom shell 1, and a recessed or through-going bayonet 401 is regularly arranged on the top cover 4 at the positions of the plurality of bayonet blocks 101, and the top cover and the bottom shell are fixed together by the cooperation between the bayonet 401 and the bayonet block 101.

[0056] Of course, the positions of the block and the opening can be reversed. The block is regularly set on the inner wall of the top cover 4 , and the opening is regularly set on the outside of the side panel of the bottom shell 1 .

[0057] Further, such as Figure 4 As shown, the inner bottom surface of the top cover 4 presses the waterproof breathable membrane 3 against the upper end of the bottom shell 1 .

[0058] Furthermore, in order to facilitate the gas to enter the bottom shell 1 and be detected by the sensor chip 2, one or more air intake grilles 402 are regularly arranged on the upper end of the top cover 4. A plurality of air intake holes 4021 are regularly arranged on the air intake grille 402, and the plurality of air intake holes penetrate the upper end of the top cover 4. External gas enters the bottom shell 1 through the plurality of air intake holes and the waterproof breathable membrane 3 in sequence.

[0059] Further, such as Figure 2 As shown, the upper end surface of the bottom shell 1 is regularly provided with a plurality of downwardly recessed fixing holes 107, and the inner bottom surface of the top cover 4 at the positions of the plurality of fixing holes 107 is regularly provided with protruding fixing bumps. The waterproof breathable membrane 3 can be further pressed and fixed to the upper end of the bottom shell by the plurality of fixing bumps inside the top cover 4 cooperating with the plurality of fixing holes 107 on the upper end surface of the bottom shell.

[0060] Furthermore, the specific shape of the boss 102 is not limited. Figure 2 and 4 As shown, in one embodiment, a trapezoidal cylinder with a narrow top and a wide bottom is used, and its four sides are inclined, so that the condensation can slide into the liquid storage tank 106 more quickly. Of course, a trapezoidal cylinder with a narrow top and a wide bottom can also be used, or a rectangular cylinder can be used directly.

[0061] The bottom shell and the top cover of the utility model are both made of plastic material, and the sensor chip 2 is packaged by the plastic bottom shell, the waterproof and breathable membrane and the plastic top cover. Compared with ceramic packaging, the cost is lower, the process is simpler and the efficiency is higher.

[0062] The utility model can, through the design of the top cover, on the one hand, press the waterproof breathable membrane through the top cover to prevent the waterproof breathable membrane from falling off; on the other hand, it can effectively protect the waterproof breathable membrane to prevent foreign matter from damaging the waterproof breathable membrane.

[0063] 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 universal waterproof and breathable gas sensor, characterized in that: It includes a bottom shell, a sensor chip, a waterproof and breathable membrane, a top cover and several pins; The upper end of the bottom shell is open, and a chamber for loading the sensor chip is arranged inside the bottom shell. The sensor chip is fixed in the internal chamber of the bottom shell. The waterproof and breathable membrane seals the upper end opening of the bottom shell, and seals the sensor chip in the internal chamber of the bottom shell. The top cover covers the upper end of the bottom shell and is assembled with the top cover, and the waterproof and breathable membrane and the sensor chip are encapsulated in the top cover and the bottom shell. The plurality of pins are arranged on both sides of the bottom shell and are integrally injection molded therewith, one end of the plurality of pins is introduced into the internal cavity of the bottom shell for lead wires to form lead pins, and the other end thereof is led out of the bottom of the bottom shell for plug-in or patch to form plug-in pins or patch pins; The sensor chip is electrically connected to one end of the lead pin via a lead wire; One or more air intake grilles are regularly arranged on the upper end of the top cover, and the air intake grilles include a plurality of air intake holes, and the plurality of air intake holes pass through the upper end of the top cover, and the outside air enters into the internal chamber of the bottom shell through the plurality of air intake holes and the waterproof breathable membrane in turn.

2. A universal waterproof and breathable gas sensor as claimed in claim 1, characterized in that: An upwardly protruding boss is regularly arranged in the inner chamber of the bottom shell, and the boss does not contact the inner wall of the bottom shell, so that a downwardly concave liquid storage tank is formed between the boss and the inner wall of the bottom shell; One or more chip slots for loading the sensor chip are regularly arranged on the upper end of the boss, and the sensor chip is installed and fixed in the chip slot; One or more first drainage grooves are regularly arranged between the chip card slot and the liquid storage tank, and the chip card slot is connected to the liquid storage tank through the first drainage grooves; The lead pins of the plurality of pins are introduced into the upper end of the boss, and second drainage grooves are regularly arranged between adjacent lead pins, and the second drainage grooves are connected to the liquid storage tank.

3. A universal waterproof and breathable gas sensor as claimed in claim 2, characterized in that: The second drainage groove is also connected to the chip card slot and the liquid storage tank.

4. A universal waterproof and breathable gas sensor as claimed in claim 2, characterized in that: The bottom surfaces of the first drainage groove and the second drainage groove are gradually inclined downward from the chip card slot to the liquid storage tank to form a downward slope.

5. A universal waterproof and breathable gas sensor as claimed in claim 2, characterized in that: The upper ends of the lead pins are flush with the upper surface of the sensor chip and are arranged on the same horizontal plane.

6. A universal waterproof and breathable gas sensor as claimed in claim 2, characterized in that: The boss is a trapezoidal column that is narrow at the top and wide at the bottom.

7. A universal waterproof and breathable gas sensor according to any one of claims 1 to 6, characterized in that: The top cover is clamped and fixed on the upper end of the bottom shell.

8. A universal waterproof and breathable gas sensor as claimed in claim 7, characterized in that: The outer sides of the left and right side panels or the front and rear side panels of the bottom shell are regularly provided with a plurality of raised blocks, and the top cover is regularly provided with a plurality of recessed or through slots at the positions of the plurality of slots; the top cover and the bottom shell are fixed together by the cooperation of the slots and the blocks.

9. A universal waterproof and breathable gas sensor as claimed in claim 7, characterized in that: The upper end surface of the bottom shell is regularly provided with a plurality of downwardly recessed fixing holes, and the inside of the top cover at the positions of the plurality of fixing holes is regularly provided with a plurality of protruding fixing bumps, and the plurality of fixing bumps inside the top cover cooperate with the plurality of fixing holes on the upper end surface of the bottom shell to press and fix the waterproof breathable membrane to the upper end of the bottom shell.

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