A protective pressure sensor

Abstract

The utility model relates to pressure detection technical field discloses a kind of protective pressure sensor, including sensing component, packaging seat and protective shell, the sensing component with the packaging seat detachably connected, the protective shell cover is located the outside of the sensing component and with the packaging seat detachably connected;The opposite ends of the packaging seat are formed with first end and second end respectively, the center area of the packaging seat is hollow and formed with liquid injection cavity, the liquid injection cavity is connected with the first end and the second end, the sensing component is connected with the first end and covers the liquid injection cavity, the rim of the protective shell is connected with the first end, the second end is provided with pressure diaphragm and the pressure diaphragm covers the liquid injection cavity.The utility model plays the following technical effect: by setting protective shell, can protect sensing component from collision and friction of external object, guarantee the normal use of pressure sensor, prolong service life.

Description

Technical Field

[0001] This utility model belongs to the field of pressure detection technology, specifically relating to a protective pressure sensor. Background Technology

[0002] Currently, pressure sensors used in batteries (especially lithium batteries) typically consist of a sensing component and a packaged cavity fixedly connected to the sensing component. The packaged cavity contains a pressure-bearing diaphragm and is filled with a transmission medium such as silicone oil. Generally, only the critical sensing element is encapsulated inside the packaged cavity, while other components (e.g., circuit boards and signal transmission devices) are partially or completely exposed outside the packaged cavity. During the transportation, installation, or use of the pressure sensor, the exposed circuit boards and signal transmission devices are prone to friction or collision with external objects, resulting in scratches or damage. This not only affects the normal operation of the pressure sensor, thus impacting the accuracy and reliability of the detection results, but also shortens the lifespan of the pressure sensor. Utility Model Content

[0003] To address the shortcomings of the prior art, this utility model provides a protective pressure sensor. By adding a protective housing and covering the outside of the sensing component, the sensing component can be protected from collisions and friction from external objects, thereby ensuring the normal use of the pressure sensor and extending its service life.

[0004] The technical effects to be achieved by this utility model are realized through the following technical aspects: This utility model provides a protective pressure sensor, including a sensing component, a packaging base, and a protective housing. The sensing component is detachably connected to the packaging base, and the protective housing covers the outside of the sensing component and is detachably connected to the packaging base. The packaging base has a first end and a second end formed at opposite ends. A liquid injection cavity is formed in the hollow central area of ​​the packaging base. The liquid injection cavity connects the first end and the second end. The sensing component is connected to the first end and covers the liquid injection cavity. The protective shell is connected to the edge of the first end. The second end is provided with a pressure-bearing diaphragm and the pressure-bearing diaphragm covers the liquid injection cavity.

[0005] As a further description of the technical solution of this utility model, the sensing component includes a circuit board, a sensing device, and a signal transmission device. The sensing device and the signal transmission device are respectively disposed on opposite sides of the circuit board. The circuit board is connected to the first end. The sensing device is located in the liquid injection cavity. A clearance groove is provided on the protective housing. The position of the clearance groove corresponds to the position of the signal transmission device.

[0006] As a further description of the technical solution of this utility model, the edge of the first end extends outward to form a convex edge structure, and the opposite sides of the convex edge structure are respectively formed with a first connecting surface and a second connecting surface. A limiting protrusion is provided on the inner sidewall of the protective shell, and a hook is provided on the edge of the protective shell. The limiting protrusion abuts against the first connecting surface, and the hook abuts against the second connecting surface.

[0007] As a further description of the technical solution of this utility model, the convex edge structure is provided with a first connection area and a second connection area. The first connection area is located on the outer periphery of the second connection area. The first connection area is used to connect with the protective shell, and the second connection area is used to connect with the external mounting carrier.

[0008] As a further description of the technical solution of this utility model, the protective pressure sensor also includes a fastener, a first connecting hole is provided on the edge of the circuit board, a second connecting hole is provided on the edge of the first end, and the fastener passes through the first connecting hole and the second connecting hole.

[0009] As a further description of the technical solution of this utility model, the first end is recessed in a direction close to the second end to form an annular groove, the annular groove is located between the injection cavity and the second connecting hole, and a sealing ring is provided in the annular groove, the sealing ring being interference-fitted with the circuit board.

[0010] As a further description of the technical solution of this utility model, a positioning post is provided on the edge of the first end, and a positioning groove is provided on the edge of the circuit board corresponding to the position of the positioning post, and the positioning post is inserted into the positioning groove.

[0011] As a further description of the technical solution of this utility model, the second end is also provided with a reinforcing pad, the second end and the reinforcing pad are respectively connected to the opposite sides of the pressure-bearing diaphragm, and the central area of ​​the reinforcing pad is provided with a clearance through hole, the position of the clearance through hole corresponding to the position of the injection cavity.

[0012] As a further description of the technical solution of this utility model, the reinforcing gasket is an aluminum alloy gasket, and the encapsulation base is an aluminum alloy encapsulation base.

[0013] As a further description of the technical solution of this utility model, the pressure-bearing diaphragm is a stainless steel diaphragm.

[0014] In summary, this utility model has at least the following advantages: The protective pressure sensor provided by this utility model, by setting a protective housing and covering the outside of the sensing component, can protect the sensing component and prevent the components exposed outside the housing from friction or collision with external objects. This ensures the normal performance of the pressure sensor, guarantees the accuracy and reliability of the pressure sensor's detection results, and also extends the service life of the pressure sensor. Furthermore, the detachable connection between the protective housing and the housing, and between the sensing component and the housing, facilitates the installation and maintenance of the pressure sensor, thus improving its practicality and durability. Attached Figure Description

[0015] Figure 1 This is an explosion diagram (a) of the protective pressure sensor according to Embodiment 1 of this utility model. Figure 2 This is a schematic diagram (II) of the explosion of the protective pressure sensor of Embodiment 1 of this utility model; Figure 3 This is a cross-sectional view of the protective pressure sensor of Embodiment 1 of this utility model; Figure 4 This is a top view of the packaging base of Embodiment 1 of this utility model; Figure 5 This is an explosion diagram of the protective pressure sensor according to Embodiment 2 of this utility model; Figure 6 This is an exploded schematic diagram of the protective pressure sensor of Embodiment 3 of this utility model.

[0016] Marked in the image: 1. Sensing component; 11. Circuit board; 111. First connecting hole; 112. Positioning slot; 12. Sensing device; 13. Signal transmission device; 2. Encapsulation base; 21. First end; 211. Second connecting hole; 212. Annular groove; 213. Positioning post; 22. Second end; 23. Liquid injection cavity; 24. Protruding edge structure; 241. First connecting surface; 242. Second connecting surface; 243. First connecting area; 244. Second connecting area; 3. Protective housing; 31. Clearance groove; 32. Limiting protrusion; 33. Hook; 4. Pressure-bearing diaphragm; 5. Fasteners; 6. Sealing ring; 7. Reinforcing gasket; 71. Clearance through hole. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are some, but not all, of the embodiments of this utility model.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0019] Example 1 refer to Figures 1 to 4 The protective pressure sensor provided in this embodiment includes a sensing component 1, a housing 2, and a protective housing 3. The sensing component 1 is detachably connected to the housing 2, and the protective housing 3 covers the outside of the sensing component 1 and is detachably connected to the housing 2.

[0020] The encapsulation base 2 has a first end 21 and a second end 22 formed at opposite ends. A liquid injection cavity 23 is formed in the hollow central area of ​​the encapsulation base 2, which connects the first end 21 and the second end 22. The sensing component 1 is connected to the first end 21 and covers the liquid injection cavity 23. The protective shell 3 is connected to the edge of the first end 21. The second end 22 is provided with a pressure-receiving diaphragm 4, which covers the liquid injection cavity 23. The covering effect of the sensing component 1 and the pressure-receiving diaphragm 4 makes the liquid injection cavity 23 a closed cavity. The liquid injection cavity 23 is filled with silicone oil, which can transmit the pressure received by the pressure-receiving diaphragm 4 to the sensing component 1, thereby realizing pressure sensing.

[0021] It is understood that both the sensing component 1 and the protective housing 3 are connected to the first end 21, and the protective housing 3 is located on the outer periphery of the sensing component 1. The protective housing 3 covers the portion of the sensing component 1 exposed outside the encapsulation base 2 within the protective housing 3, preventing external objects from rubbing or colliding with the sensing component 1. The protective housing 3 effectively protects the sensing component 1, ensuring the pressure sensor has normal operating performance, guaranteeing the accuracy and reliability of pressure detection results, and extending the service life of the pressure sensor. The detachable connection between the protective housing 3 and the encapsulation base 2, as well as the detachable connection between the sensing component 1 and the encapsulation base 2, facilitates the installation and maintenance of the pressure sensor, thereby improving the practicality and durability of the pressure sensor.

[0022] In some embodiments, the sensing component 1 includes a circuit board 11, a sensing device 12, and a signal transmission device 13. The sensing device 12 and the signal transmission device 13 are respectively disposed on opposite sides of the circuit board 11. The circuit board 11 is connected to the first end 21, and the sensing device 12 is located inside the liquid injection cavity 23. In this embodiment, the sensing device 12 is a MEMS (Micro-Electro-Mechanical Systems) sensor, and the signal transmission device 13 is a connector. A clearance slot 31 is provided on the protective housing 3. The position of the clearance slot 31 corresponds to the position of the signal transmission device 13. The clearance slot 31 allows the signal transmission device 13 to connect to an external battery management system, thereby ensuring the normal transmission of pressure sensing signals.

[0023] In some embodiments, the edge of the first end 21 extends outward to form a protruding edge structure 24. A first connecting surface 241 and a second connecting surface 242 are formed on opposite sides of the protruding edge structure 24. A limiting protrusion 32 is provided on the inner wall of the protective housing 3, and a hook 33 is provided on the edge of the protective housing 3. The limiting protrusion 32 abuts against the first connecting surface 241, and the hook 33 abuts against the second connecting surface 242. Through the cooperation of the limiting protrusion 32 and the hook 33, the protective housing 3 can be engaged with the protruding edge structure 24, thereby achieving the installation of the protective housing 3. The protective housing 3 is made of a material with a certain degree of elasticity; by applying external force, the hook 33 can be disengaged from the protruding edge structure 24, thereby achieving the disassembly of the protective housing 3. The installation and disassembly process of the protective housing 3 is simple, convenient, and easy to operate.

[0024] It should be noted that there are two or more limiting protrusions 32 and hooks 33, preferably three or four; the number of limiting protrusions 32 and hooks 33 can be the same or different, preferably the same; the limiting protrusions 32 and hooks 33 can be located on the same straight line or can be staggered. In this embodiment, the limiting protrusions 32 and hooks 33 are staggered.

[0025] In some embodiments, the convex edge structure 24 is provided with a first connection area 243 and a second connection area 244. Both the first connection area 243 and the second connection area 244 are annular. The first connection area 243 is located on the outer periphery of the second connection area 244. The first connection area 243 is used to connect with the protective shell 3, and the second connection area 244 is used to weld with the external mounting carrier. In this embodiment, the external mounting carrier is the battery shell.

[0026] Example 2 As a further optimization of Example 1, in Figures 1 to 4 Based on, refer to Figure 5The protective pressure sensor also includes a fastener 5. A first connecting hole 111 is provided along the edge of the circuit board 11, and a second connecting hole 211 is provided along the edge of the first end 21. The fastener 5 passes through the first connecting hole 111 and the second connecting hole 211. The number of fasteners 5, the first connecting hole 111, and the second connecting hole 211 are the same, preferably three or four, thereby ensuring the connection stability between the circuit board 11 and the first end 21.

[0027] In this embodiment, the fastener 5 is a screw, the first connecting hole 111 is a through hole, the second connecting hole 211 is a blind hole, and the inner wall of the second connecting hole 211 is formed with a threaded structure. The connection and separation of the circuit board 11 and the first end 21 can be realized through the cooperation of the screw and the threaded structure. The connection structure is simple, and the connection and separation process is convenient and easy to operate.

[0028] The first end 21 is recessed towards the second end 22 to form an annular groove 212. The annular groove 212 is located between the injection cavity 23 and the second connecting hole 211. A sealing ring 6 is provided in the annular groove 212, and the sealing ring 6 is interference-fitted with the circuit board 11. The sealing ring 6 can be made of a highly elastic material such as rubber. Through the interference fit between the sealing ring 6 and the circuit board 11, the sealing performance of the injection cavity 23 can be improved, preventing the leakage of silicone oil in the injection cavity 23, which is beneficial to improving the accuracy of pressure detection results.

[0029] As a further optimization, a positioning post 213 is provided on the edge of the first end 21, and a positioning groove 112 is formed on the edge of the circuit board 11 corresponding to the position of the positioning post 213. The positioning post 213 is inserted into the positioning groove 112. The number of positioning posts 213 can be one or more, and the number of positioning grooves 112 matches the number of positioning posts 213. In this embodiment, there are two positioning posts 213 and two positioning grooves 112, and the two positioning posts 213 are arranged in a mirror-symmetrical manner. The positioning grooves 112 are positioned corresponding to the positioning posts 213. Through the cooperation of the positioning posts 213 and the positioning grooves 112, rapid alignment of the circuit board 11 before connection with the first end 21 can be achieved, ensuring that the circuit board 11 is accurately positioned on the first end 21, thereby improving the accuracy and efficiency of the connection process between the circuit board 11 and the first end 21.

[0030] Example 3 As a further optimization of Example 2, in Figures 1 to 5 Based on, refer to Figure 6The second end 22 is also provided with a reinforcing gasket 7. The second end 22 and the reinforcing gasket 7 are respectively connected to opposite sides of the pressure-bearing diaphragm 4. The second end 22, the pressure-bearing diaphragm 4, and the reinforcing gasket 7 can be connected by welding. A clearance through hole 71 is opened in the central area of ​​the reinforcing gasket 7, and the position of the clearance through hole 71 corresponds to the position of the injection cavity 23. The setting of the reinforcing gasket 7 allows the pressure-bearing diaphragm 4 to be sandwiched between the second end 22 and the reinforcing gasket 7. The reinforcing gasket 7 can protect the edge of the pressure-bearing diaphragm 4, and at the same time improve the connection strength between the pressure-bearing diaphragm 4 and the second end 22, preventing tearing or damage between the pressure-bearing area and the edge connection of the pressure-bearing diaphragm 4 during the stress process, which is beneficial to improving the durability of the pressure-bearing diaphragm 4.

[0031] In this embodiment, the reinforcing gasket 7 is an aluminum alloy gasket, and the encapsulation base 2 is an aluminum alloy encapsulation base. Aluminum alloy material has high mechanical strength and corrosion resistance. Using aluminum alloy for the reinforcing gasket 7 and the encapsulation base 2 can ensure that the pressure sensor has sufficient mechanical strength and corrosion resistance, which is beneficial to extending the service life of the pressure sensor.

[0032] In this embodiment, the pressure-bearing diaphragm 4 is a stainless steel diaphragm. Stainless steel not only has strong mechanical strength and corrosion resistance, but also has a certain degree of flexibility. Using a stainless steel diaphragm as the pressure-bearing diaphragm 4 can improve the durability of the pressure-bearing diaphragm 4.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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.

[0034] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A protective pressure sensor, characterized in that, It includes a sensing component (1), a packaging base (2) and a protective housing (3). The sensing component (1) is detachably connected to the packaging base (2), and the protective housing (3) covers the outside of the sensing component (1) and is detachably connected to the packaging base (2). The packaging base (2) has a first end (21) and a second end (22) formed at opposite ends. A liquid injection cavity (23) is formed in the hollow center area of ​​the packaging base (2). The liquid injection cavity (23) connects the first end (21) and the second end (22). The sensing component (1) is connected to the first end (21) and covers the liquid injection cavity (23). The protective shell (3) is connected to the edge of the first end (21). The second end (22) is provided with a pressure diaphragm (4) and the pressure diaphragm (4) covers the liquid injection cavity (23).

2. The protective pressure sensor according to claim 1, characterized in that, The sensing component (1) includes a circuit board (11), a sensing device (12), and a signal transmission device (13). The sensing device (12) and the signal transmission device (13) are respectively disposed on opposite sides of the circuit board (11). The circuit board (11) is connected to the first end (21). The sensing device (12) is located inside the injection cavity (23). The protective housing (3) has a clearance groove (31) which corresponds to the position of the signal transmission device (13).

3. The protective pressure sensor according to claim 2, characterized in that, The edge of the first end (21) extends outward to form a convex edge structure (24). The opposite sides of the convex edge structure (24) are respectively formed with a first connecting surface (241) and a second connecting surface (242). A limiting protrusion (32) is provided on the inner side wall of the protective shell (3). A hook (33) is provided on the edge of the protective shell (3). The limiting protrusion (32) abuts against the first connecting surface (241), and the hook (33) abuts against the second connecting surface (242).

4. The protective pressure sensor according to claim 3, characterized in that, The convex edge structure (24) is provided with a first connection area (243) and a second connection area (244). The first connection area (243) is located on the outer periphery of the second connection area (244). The first connection area (243) is used to connect with the protective shell (3), and the second connection area (244) is used to connect with the external mounting carrier.

5. The protective pressure sensor according to claim 2, characterized in that, It also includes a fastener (5), the edge of the circuit board (11) is provided with a first connection hole (111), the edge of the first end (21) is provided with a second connection hole (211), and the fastener (5) passes through the first connection hole (111) and the second connection hole (211).

6. The protective pressure sensor according to claim 5, characterized in that, The first end (21) is recessed in a direction close to the second end (22) to form an annular groove (212). The annular groove (212) is located between the injection cavity (23) and the second connecting hole (211). A sealing ring (6) is provided in the annular groove (212). The sealing ring (6) is interference-fitted to the circuit board (11).

7. The protective pressure sensor according to claim 6, characterized in that, The first end (21) is provided with a positioning post (213) on its edge, and the edge of the circuit board (11) is provided with a positioning groove (112) corresponding to the position of the positioning post (213), and the positioning post (213) is inserted into the positioning groove (112).

8. The protective pressure sensor according to claim 1, characterized in that, The second end (22) is also provided with a reinforcing pad (7). The second end (22) and the reinforcing pad (7) are respectively connected to the opposite sides of the pressure diaphragm (4). The center area of ​​the reinforcing pad (7) is provided with a clearance hole (71). The position of the clearance hole (71) corresponds to the position of the injection cavity (23).

9. The protective pressure sensor according to claim 8, characterized in that, The reinforcing pad (7) is an aluminum alloy pad, and the encapsulation base (2) is an aluminum alloy encapsulation base.

10. The protective pressure sensor according to claim 9, characterized in that, The pressure-bearing diaphragm (4) is a stainless steel diaphragm.

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