Sealed metal packaging sensor and battery

Abstract

The invention discloses a sealed metal packaging sensor and a battery. The sealed metal packaging sensor comprises a chip fixing seat, a diaphragm, a circuit board and a sealing seat, the top surface of the chip fixing seat is recessed inwards to form a fixing seat groove, a fixing seat through hole communicated with the fixing seat groove is formed in the middle of the chip fixing seat, the circuit board is assembled in the fixing seat groove, and an induction electrode protruding out of the bottom of the circuit board extends into the fixing seat through hole; the fixed seat through hole is filled with an insulating substrate; the diaphragm is clamped between the chip fixing seat and the sealing seat; the sealing seat comprises a top plate, the end face, facing the diaphragm, of the top plate is recessed inwards to form a top plate cavity, and the top plate through hole penetrates through the top plate and communicates with the top plate cavity. According to the sensor, the elastic rubber nail arranged at the liquid injection port of the battery is pressed through the sealing seat, and the circuit board and the diaphragm in the chip fixing seat are used for sensing fine changes in the battery, so that the liquid injection port can be reliably sealed, the battery can be detected, and the application safety of the battery is improved.

Description

Technical Field

[0001] The present invention relates to the field of sensor technology, and in particular to a sealed metal packaged sensor and a battery. Background Art

[0002] The rechargeable battery needs to be filled with a metal salt ion solution so that the electrochemical reaction of the metal salt ion solution can be used for charging and discharging. The battery shell is usually provided with a liquid injection port. After the metal salt ion solution is injected, the liquid injection port needs to be sealed. In the traditional technical method, aluminum nails and plastic nails under the aluminum nails are usually used to seal the liquid injection port. During the charging and discharging process of the battery, its internal temperature and air pressure will change. In particular, when the battery is overheated, it is necessary to monitor the changes in the internal temperature and air pressure of the battery and take corresponding measures to avoid overheating, fire, and explosion of the battery. However, the seal with aluminum nails as the main body cannot effectively detect the temperature and air pressure of the solution inside the battery during the application process, which affects the reliability of the battery equipped with the aluminum nail seal. Therefore, the seal used for sealing the battery liquid injection port in the prior art has the problem of being unable to detect the inside of the battery. Summary of the invention

[0003] The present invention provides a sealed metal package sensor and a battery, aiming to solve the problem in the prior art that the sealing member used for sealing the battery filling port cannot detect the inside of the battery.

[0004] In a first aspect, the present invention discloses a sealed metal package sensor, which includes a chip fixing seat, a diaphragm, a circuit board and a sealing seat;

[0005] The top surface of the chip fixing seat is inwardly recessed to form a fixing seat groove, a fixing seat through hole communicating with the fixing seat groove is provided in the middle of the chip fixing seat, the circuit board is assembled in the fixing seat groove and the sensing electrode protruding from the bottom of the circuit board extends into the fixing seat through hole; the fixing seat through hole is filled with an insulating substrate;

[0006] The diaphragm is sandwiched between the chip fixing seat and the sealing seat, and the outer edge size of the diaphragm is the same as the outer size of the chip fixing seat;

[0007] The sealing seat includes a top plate, which protrudes toward one end of the diaphragm to form a top plate boss, and the outer size of the top plate boss is the same as the outer edge size of the diaphragm; the end surface of the top plate facing the diaphragm is recessed inward to form a top plate cavity, and the top plate through hole penetrates the top plate and is connected to the top plate cavity.

[0008] In the sealed metal package sensor, a trumpet-shaped fixing seat opening is provided on the side of the chip fixing seat facing the diaphragm, and the smaller opening of the fixing seat opening is connected to the fixing seat through hole.

[0009] The sealed metal packaged sensor, wherein the top plate cavity is a trumpet-shaped cavity.

[0010] The sealed metal package sensor, wherein a first connecting ring is formed on the bottom surface of the chip fixing seat around the larger opening of the fixing seat opening, and the top plate boss is formed around the outer side of the top plate cavity to form a second connecting ring;

[0011] The first connecting ring and the second connecting ring have the same size.

[0012] The sealed metal packaged sensor, wherein the outer edge of the bottom surface of the chip fixing seat is provided with an inclined side edge.

[0013] The sealed metal packaged sensor, wherein the end surface of the top plate facing away from the diaphragm is a plane.

[0014] In the sealed metal packaged sensor, the outer side wall of the top plate is inclined toward a side away from the diaphragm.

[0015] The sealed metal packaged sensor, wherein the inner diameter of the top plate through hole is smaller than the inner diameter of the fixing seat through hole.

[0016] The sealed metal packaged sensor, wherein the depth of the opening of the fixing seat is not less than the depth of the top plate cavity.

[0017] In a second aspect, the present invention further discloses a battery, wherein the battery comprises a housing, an explosion-proof valve, an electrode column, an elastic glue and the sealed metal package sensor as described in the first aspect above;

[0018] An opening is provided above the shell, a plastic layer is provided at the opening of the shell, a battery top cover is provided above the plastic layer, the battery top cover is covered and arranged on the upper layer of the plastic layer, so that the plastic layer supports and fixes the battery top cover, and the battery top cover and the shell are sealed by welding;

[0019] The elastic rubber nail passes through the top cover liquid injection port set on the battery top cover, and the end of the elastic rubber nail is embedded in the through hole of the plastic layer for sealing; the sealed metal package sensor is press-fitted and assembled above the elastic rubber nail, and the top plate through hole is connected to the rubber nail through hole set in the elastic rubber nail;

[0020] Two electrode posts respectively penetrate the battery top cover and the plastic layer and extend into the interior of the shell;

[0021] The battery top cover is provided with a mounting groove on the side of the sealed metal package sensor, and the explosion-proof valve is fixedly assembled in the mounting groove.

[0022] The present invention discloses a sealed metal package sensor and battery, which includes a chip fixing seat, a diaphragm, a circuit board and a sealing seat; the top surface of the chip fixing seat is recessed inward to form a fixing seat groove, the middle part of the chip fixing seat is provided with a fixing seat through hole connected to the fixing seat groove, the circuit board is assembled in the fixing seat groove and the sensing electrode protruding from the bottom of the circuit board extends into the fixing seat through hole; the fixing seat through hole is filled with an insulating substrate; the diaphragm is clamped between the chip fixing seat and the sealing seat; the sealing seat includes a top plate, one end of the top plate facing the diaphragm is recessed inward to form a top plate cavity, and the top plate through hole penetrates the top plate and is connected to the top plate cavity. The above sensor, through the sealing seat, presses the elastic nails set at the liquid injection port of the battery, and senses the subtle changes inside the battery through the circuit board and the diaphragm in the chip fixing seat, which can not only reliably seal the liquid injection port, but also detect the battery, thereby improving the safety of battery application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0024] Figure 1 An exploded structural diagram of a sealed metal package sensor provided in an embodiment of the present invention;

[0025] Figure 2 A cross-sectional structural diagram of a sealed metal package sensor provided in an embodiment of the present invention;

[0026] Figure 3 An external structural diagram of a battery provided by an embodiment of the present invention;

[0027] Figure 4 A cross-sectional structural diagram of a battery provided in an embodiment of the present invention.

[0028] Figure numbers: 10, sealed metal package sensor; 1, chip fixing seat; 2, diaphragm; 3, circuit board; 4, sealing seat; 11, fixing seat through hole; 5, insulating substrate; 41, top plate; 411, top plate boss; 12, fixing seat opening; 412, top plate cavity; 13, inclined side; 414, top plate through hole; 6, battery; 61, shell; 62, explosion-proof valve; 63, plastic layer; 64, battery top cover; 641, top cover liquid filling port; 65, electrode column; 66, elastic rubber nail; 661, rubber nail through hole. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0031] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0032] It should be further understood that the terms "and, or" used in the present description and the appended claims refer to and include any and all possible combinations of one or more of the associated listed items.

[0033] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

[0034] The present invention discloses a sealed metal package sensor, such as Figure 1 and Figure 2As shown, the sealed metal package sensor 10 comprises a chip fixing seat 1, a diaphragm 2, a circuit board 3 and a sealing seat 4; the top surface of the chip fixing seat 1 is recessed inward to form a fixing seat groove, the middle of the chip fixing seat 1 is provided with a fixing seat through hole 11 connected to the fixing seat groove, the circuit board 3 is assembled in the fixing seat groove and the sensing electrode protruding from the bottom of the circuit board 3 extends into the fixing seat through hole 11; the fixing seat through hole 11 is filled with an insulating substrate 5; the diaphragm 2 is clamped between the chip fixing seat 1 and the fixing seat groove. Between the chip fixing seat 1 and the sealing seat 4, the outer edge size of the diaphragm 2 is the same as the outer size of the chip fixing seat 1; the sealing seat 4 includes a top plate 41, and the top plate 41 protrudes toward one end of the diaphragm 2 to form a top plate boss 411, and the outer size of the top plate boss 411 is the same as the outer edge size of the diaphragm 2; the top plate 41 is recessed inwardly toward one end of the diaphragm 2 to form a top plate cavity 412, and a top plate through hole 414 passes through the top plate 41 and is connected to the top plate cavity 412.

[0035] Specifically, a sealed metal package sensor 10 can be provided, which is composed of a chip fixing seat 1, a circuit board 3, a diaphragm 2 and a sealing seat 4, and the diaphragm 2 is sandwiched between the sealing seat 4 and the chip fixing seat 1. Among them, the materials of the diaphragm 2, the chip fixing seat 1 and the top plate 41 in the sealing seat 4 are all aluminum or aluminum alloy, and laser melting welding can be used between the diaphragm 2 and the chip fixing seat 1 and between the diaphragm 2 and the top plate 41, and the welding temperature is 700-1000°C. The use of aluminum or aluminum alloy to manufacture the diaphragm 2, the chip fixing seat 1 and the top plate 41 can greatly reduce the welding temperature, avoid excessive temperature from being transmitted to one side of the circuit board 3 and thus damaging the sensor device on the circuit board 3, that is, it can improve the yield rate of the above-mentioned sensor production. Among them, the circuit board 3 can be a ceramic plate prepared by ceramic material.

[0036] The insulating substrate 5 is filled in the gap between the fixing seat through hole 11 and the sensing electrode, so that the components in the fixing seat through hole 11 are more compact, and the insulation and the stability of fixing the sensing electrode are improved. When the above-mentioned sealed metal package sensor 10 is assembled on the battery 6, the sealing seat 4 is tightly pressed on the flexible glue nail 66 through the bottom surface, and the top plate through hole 414 is connected with the glue nail through hole 661; then its working principle is to sense the pressure change inside the battery 6 through the glue nail through hole 661 and transmit the slight vibration to the diaphragm 2, and the top plate cavity 412 is used to expand the contact area of ​​the diaphragm 2, so that the diaphragm 2 has a larger area to sense the pressure change inside the battery; the diaphragm 2 generates slight vibrations and causes slight changes in the volume of the fixing seat through hole 11 and transmits the slight vibrations to the sensing electrode, and the subtle vibrations are sensed by the sensing electrode to achieve accurate detection of the inside of the battery 6.

[0037] Specifically, the outer dimensions of the top plate boss 411, the outer edge dimensions of the diaphragm 2, and the outer dimensions of the chip holder 1 can be set to be the same, thereby improving the stability of fixing the diaphragm 2. In the specific embodiment of the present application, the outer wall of the top plate boss 411, the outer wall of the diaphragm 2, and the outer wall of the chip holder 1 are all circular, so the outer diameter of the top plate boss 411, the outer diameter of the diaphragm 2, and the outer diameter of the chip holder 1 can be set to be equal.

[0038] In a more specific embodiment, the chip holder 1 is provided with a trumpet-shaped holder opening 12 on one side facing the diaphragm 2, and the smaller opening of the holder opening 12 is connected to the holder through hole 11. The top plate cavity 412 is a trumpet-shaped cavity.

[0039] Since the chip fixing seat 1 is provided with a trumpet-shaped fixing seat opening 12, the side wall of the fixing seat opening 12 is an inclined side wall. This inclined side wall can improve the stability of the fixed connection between the chip fixing seat 1 and the diaphragm 2 without affecting the detection performance of the circuit board 3, and increase the overall structural strength of the sealed metal package sensor 10. At the same time, a trumpet-shaped top plate cavity 412 can be provided on the side of the top plate 41 facing the diaphragm 2, and the outer opening of the top plate cavity 412 is arranged opposite to the fixing seat opening 12, and the inner opening of the top plate cavity 412 is connected to the end of the top plate through hole 414; due to the trumpet-shaped top plate cavity 412, the space on both sides of the diaphragm 2 is wider, so that both sides of the diaphragm 2 can sense and efficiently conduct the vibration of the cavity.

[0040] More specifically, a first connection ring is formed on the bottom surface of the chip holder 1 around the larger opening of the holder opening 12, and the top plate boss 411 forms a second connection ring around the outer side of the top plate cavity 412; the first connection ring and the second connection ring have the same size. Specifically, an inclined side edge 13 is provided at the outer edge of the bottom surface of the chip holder 1.

[0041] Furthermore, in order to improve the stability of the diaphragm 2, a first connecting ring can be set on the bottom surface of the chip fixing seat 1, and a second connecting ring can be set on the top plate boss 411. The first connecting ring and the second connecting block can be set to the same size, wherein the width of the first connecting ring and the second connecting ring can be set to 0.8-43mm. Further, in order to improve the reliability of welding and fixing the chip fixing seat 1 and the diaphragm 2, an inclined side edge 13 can be set at the outer edge of the bottom surface of the chip fixing seat 1. The inclined side edge 13 can greatly reduce the deformation of the diaphragm 2 during the welding process, thereby improving the application effect of sensing detection through the diaphragm 2.

[0042] In a more specific embodiment, one end surface of the top plate 41 away from the diaphragm 2 is a plane. Specifically, the outer side wall of the top plate 41 is inclined toward the side away from the diaphragm 2.

[0043] In order to increase the sealing effect through the sealing seat 4, the end surface of the top plate 41 away from the diaphragm can be a plane, so that the end surface of the top plate 41 away from the diaphragm can be completely in contact with the top surface of the flexible glue nail 66, thereby expanding the contact and pressing area of ​​the top plate 41 on the flexible glue nail 66, further increasing the pressing force applied to the flexible glue nail 66, thereby improving the application effect of the flexible glue nail 66 on the plastic layer 63 inside the battery 6. Furthermore, the outer wall of the top plate 41 can be set to be inclined toward the side away from the diaphragm 2, so that the top plate 41 can be more smoothly embedded in the top cover injection port 641 on the battery 6, improving the convenience and reliability of assembling the sealed metal package sensor 10 on the battery 6.

[0044] In a more specific embodiment, the inner diameter of the top plate through hole 414 is smaller than the inner diameter of the fixing seat through hole 11 . The depth of the fixing seat opening 12 is not less than the depth of the top plate concave cavity 412 .

[0045] In order to further improve the accuracy of the circuit board 3 in detecting the internal physical characteristics of the battery 6, the inner diameter of the top plate through hole 414 can be set to be smaller than the inner diameter of the fixing seat through hole 11, so that the top plate through hole 414 can have a larger cross-sectional area, that is, the contact area of ​​the circuit board 3 for sensing the vibration of the diaphragm 2 is increased, thereby improving the accuracy of the detection. In order to further increase the structural strength of the chip fixing seat 1 and improve the detection effect; the depth of the fixing seat opening 12 can be set to be not less than the depth of the top plate concave cavity 412, so that the volume of the sealed cavity formed by the fixing seat opening 12 is larger than the volume of the sealed cavity formed on one side of the top plate concave cavity 412, thereby improving the effect of transmitting the vibration of the diaphragm 2, that is, it can improve the accuracy of the detection.

[0046] The present invention also discloses a battery 6, such as Figure 3 Diaphragm 2 and Figure 4As shown in the circuit board 3, the battery 6 includes a shell 61, an explosion-proof valve 62, an electrode column 65, an elastic nail 66 and the sealed metal package sensor 10 as described in the above embodiment; an opening is provided on the top of the shell 61, a plastic layer 63 is provided at the opening of the shell 61, and a battery top cover 64 is provided on the plastic layer 63. The battery top cover 64 is covered and arranged on the upper layer of the plastic layer 63 so that the plastic layer 63 supports and fixes the battery top cover 64, and the battery top cover 64 and the shell 61 are sealed by welding; the elastic nail 66 penetrates the battery top cover A top cover liquid injection port 641 is provided on the cover 64, and the end of the elastic rubber nail 66 is embedded in the through hole of the plastic layer 63 for sealing; the sealed metal packaged sensor 10 is press-fitted and assembled on the top of the elastic rubber nail 66, and the top plate through hole 414 is connected with the rubber nail through hole 661 provided in the elastic rubber nail 66; two electrode columns 65 respectively penetrate the battery top cover 64 and the plastic layer 63 and extend into the interior of the shell 61; an installation groove is provided on the battery top cover 64 on the side of the sealed metal packaged sensor 10, and the explosion-proof valve 62 is fixedly assembled in the installation groove.

[0047] In order to ensure smooth communication between the top plate through hole 414 and the glue nail through hole 661, the diameter of the glue nail through hole 661 can be set to be larger than the diameter of the top plate through hole 414. Further, in order to improve the reliability of the top plate 41 in crimping and sealing the elastic glue nail 66, the outer diameter of the bottom surface of the top plate 41 can be set to be larger than the outer diameter of the elastic glue nail 66, so that the top plate 41 can seal the outer edge gap of the elastic glue nail 66, thereby improving the sealing performance. In a preferred embodiment, the outer diameter of the bottom surface of the top plate 41 can be set to be 1.5-3 times the outer diameter of the elastic glue nail 66.

[0048] The present invention discloses a sealed metal package sensor 10 and a battery 6, which include a chip fixing seat 1, a diaphragm 2, a circuit board 3 and a sealing seat 4; the top surface of the chip fixing seat 1 is recessed inward to form a fixing seat groove, a fixing seat through hole 11 connected to the fixing seat groove is provided in the middle of the chip fixing seat 1, the circuit board 3 is assembled in the fixing seat groove and the induction electrode protruding from the bottom of the circuit board 3 extends into the fixing seat through hole 11; the fixing seat through hole 11 is filled with an insulating substrate 5; the diaphragm 2 is clamped between the chip fixing seat 1 and the sealing seat 4; the sealing seat 4 includes a top plate 41, and one end surface of the top plate 41 facing the diaphragm 2 is recessed inward to form a top plate cavity 412, and a top plate through hole 414 passes through the top plate 41 and is connected to the top plate cavity 412. The above-mentioned sensor, by pressing the elastic glue nail 66 provided at the liquid injection port of the battery 6 through the sealing seat 4, senses the slight changes inside the battery 6 through the circuit board 3 and the diaphragm 2 in the chip fixing seat 1, can not only reliably seal the liquid injection port, but also detect the battery 6, thereby improving the safety of the application of the battery 6.

[0049] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A sealed metal package sensor, characterized in that: It includes a chip fixing seat, a diaphragm, a circuit board and a sealing seat; The top surface of the chip fixing seat is inwardly recessed to form a fixing seat groove, a fixing seat through hole communicating with the fixing seat groove is provided in the middle of the chip fixing seat, the circuit board is assembled in the fixing seat groove and the sensing electrode protruding from the bottom of the circuit board extends into the fixing seat through hole; the fixing seat through hole is filled with an insulating substrate; The diaphragm is sandwiched between the chip fixing seat and the sealing seat, and the outer edge size of the diaphragm is the same as the outer size of the chip fixing seat; The sealing seat includes a top plate, which protrudes toward one end of the diaphragm to form a top plate boss, and the outer size of the top plate boss is the same as the outer edge size of the diaphragm; the end surface of the top plate facing the diaphragm is recessed inward to form a top plate cavity, and the top plate through hole penetrates the top plate and is connected to the top plate cavity.

2. The sealed metal package sensor according to claim 1, characterized in that: A trumpet-shaped fixing seat opening is provided on one side of the chip fixing seat facing the diaphragm, and a smaller opening of the fixing seat opening is communicated with the fixing seat through hole.

3. The sealed metal package sensor according to claim 2, characterized in that: The top plate cavity is a trumpet-shaped cavity.

4. The sealed metal package sensor according to claim 3, characterized in that: A first connection ring is formed on the bottom surface of the chip fixing seat around the larger opening of the fixing seat opening, and the top plate boss is formed around the outer side of the top plate cavity to form a second connection ring; The first connecting ring and the second connecting ring have the same size.

5. The sealed metal package sensor according to claim 4, characterized in that: The outer edge of the bottom surface of the chip fixing seat is provided with an inclined side edge.

6. The sealed metal package sensor according to any one of claims 1 to 5, characterized in that: One end surface of the top plate facing away from the diaphragm is a plane.

7. The sealed metal package sensor according to claim 6, characterized in that: The outer side wall of the top plate is inclined toward a side away from the diaphragm.

8. The sealed metal package sensor according to claim 6, characterized in that: The inner diameter of the top plate through hole is smaller than the inner diameter of the fixing seat through hole.

9. The sealed metal package sensor according to claim 8, characterized in that: The depth of the fixing seat opening is not less than the depth of the top plate cavity.

10. A battery, characterized in that: The battery comprises a shell, an explosion-proof valve, an electrode column, an elastic rubber nail and a sealed metal package sensor as described in any one of claims 1 to 9; An opening is provided above the shell, a plastic layer is provided at the opening of the shell, a battery top cover is provided above the plastic layer, the battery top cover is covered and arranged on the upper layer of the plastic layer, so that the plastic layer supports and fixes the battery top cover, and the battery top cover and the shell are sealed by welding; The elastic rubber nail passes through the top cover liquid injection port set on the battery top cover, and the end of the elastic rubber nail is embedded in the through hole of the plastic layer for sealing; the sealed metal package sensor is press-fitted and assembled above the elastic rubber nail, and the top plate through hole is connected to the rubber nail through hole set in the elastic rubber nail; Two electrode posts respectively penetrate the battery top cover and the plastic layer and extend into the interior of the shell; The battery top cover is provided with a mounting groove on the side of the sealed metal package sensor, and the explosion-proof valve is fixedly assembled in the mounting groove.

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