A battery optoelectronic connector

Abstract

The present application provides a battery optoelectronic connector, which includes a housing body. An L-shaped recess is provided on the housing body. On the barrel wall of the L-shaped recess, there are a light communication interface for the optical fiber to enter the interior of the lithium battery and an electrical communication interface for connecting an external electronic sensor of the battery. Inside the housing body, there is a double-layer metal connecting pipe extending outward. One end of the double-layer metal connecting pipe communicates with the interior of the housing body, and the other end communicates with the liquid injection hole of the lithium battery. The double-layer metal connecting pipe includes an outer connecting pipe and an inner connecting pipe placed inside the outer connecting pipe. The cavity formed by the inner wall of the outer connecting pipe and the outer wall of the inner connecting pipe is the outer chamber cavity, and the outer chamber cavity is an optical fiber channel for communicating the interior of the housing body with the liquid injection hole of the lithium battery. The inner cavity of the inner connecting pipe is the inner chamber cavity, and the inner chamber cavity is an electrolyte channel for communicating the interior of the housing body with the liquid injection hole of the lithium battery. The battery optoelectronic connector provided by the present application has a simple structure and is easy to install. It can realize the monitoring of relevant parameters by using the optical fiber sensing method to enter the interior of the battery, and can be widely promoted and used in the field of lithium batteries with optical fiber sensing.

Description

Technical Field

[0001] This application relates to the technical field of battery parameter detection, and particularly to a battery optoelectronic connector. Background Art

[0002] In recent years, new energy vehicles and energy storage power stations have developed rapidly, and the demand for large-capacity lithium batteries, the core components thereof, has also increased accordingly. The energy density of large-capacity lithium batteries is high. When a large-capacity lithium battery fails, the risk coefficient is high. Therefore, it is necessary to perform real-time status monitoring on the lithium battery to monitor the working status of the lithium battery, so as to prevent or warn of the occurrence of faults.

[0003] For the real-time online status monitoring of lithium batteries, a large number of implementations are for monitoring the external temperature information of the battery. However, there is an error between the external temperature of the battery and the actual temperature of the lithium battery, and the monitored battery temperature cannot accurately represent the working status of the lithium battery. To solve the above monitoring problems, a method of using a fiber optic sensing method to enter the battery interior for relevant parameter monitoring has emerged.

[0004] At present, for the relevant parameter monitoring by using a fiber optic sensing method to enter the battery interior, the main implementation process includes opening a hole in the battery outer casing for the fiber optic to directly penetrate, or embedding a conventional flange on the battery outer casing. However, in the above methods, embedding a conventional flange affects the battery structure and is difficult to seal, and for directly opening a hole to penetrate the fiber optic, since the fiber optic is soft and thin while the battery outer casing is hard and thin, it is easy to break the fiber optic, and it is also extremely difficult to seal after opening the hole. Summary of the Invention

[0005] To solve the above problems, this application provides a battery optoelectronic connector.

[0006] This application provides a battery optoelectronic connector, including an outer casing. The outer casing is a barrel structure with one end open. An L-shaped recess is provided on the barrel wall of the outer casing. A light communication interface for the fiber optic to enter the interior of the lithium battery and an electrical communication interface for connecting an external electronic sensor of the battery are provided on the barrel wall at the L-shaped recess.

[0007] A double-layer metal connecting pipe extending outward is provided inside the outer casing. One end of the double-layer metal connecting pipe communicates with the interior of the outer casing, and the other end communicates with the lithium battery liquid injection hole. The double-layer metal connecting pipe includes an outer connecting pipe and an inner connecting pipe disposed inside the outer connecting pipe. The cavity formed by the inner wall of the outer connecting pipe and the outer wall of the inner connecting pipe is an outer chamber cavity, and the outer chamber cavity is a fiber optic channel for communicating the interior of the outer casing with the lithium battery liquid injection hole. The inner cavity of the inner connecting pipe is an inner chamber cavity, and the inner chamber cavity is an electrolyte channel for communicating the interior of the outer casing with the lithium battery liquid injection hole.

[0008] In some examples, a top cover is provided at the open end of the outer housing, a notch matching the L-shaped recess of the outer housing is provided on the side wall of the top cover, and the notch on the top cover is arranged in a dislocation manner with the L-shaped recess on the outer housing.

[0009] In some examples, a group of housing through holes for penetrating optical fibers and electrical wires is provided on the side wall of the outer housing, a group of cover through holes for penetrating optical fibers and electrical wires is provided on the side wall of the top cover, and the group of housing through holes and the group of cover through holes are arranged in a dislocation manner.

[0010] In some examples, two groups of housing through holes are provided on the side wall of the outer housing, the two groups of housing through holes are symmetrically distributed on the side wall of the outer housing, and each group of housing through holes includes an optical fiber through hole for penetrating an optical fiber and a wire through hole for penetrating an electrical wire.

[0011] Two groups of cover through holes are provided on the side wall of the top cover, the two groups of cover through holes are symmetrically distributed on the side wall of the top cover, and each group of cover through holes includes an optical fiber through hole for penetrating an optical fiber and a wire through hole for penetrating an electrical wire.

[0012] In some examples, a fiber coiling ring is provided inside the barrel of the outer housing, and the fiber coiling ring is used for coiling and fixing the optical fibers and electrical wires inside the outer housing.

[0013] In some examples, a barrier sheet is provided between the outer communication pipe and the inner communication pipe, and the barrier sheet is used for dividing the outer chamber into a plurality of relatively independent sub-outer chambers.

[0014] In some examples, a sealing plug is provided at one end of the inner communication pipe located inside the outer housing.

[0015] In some examples, the double-layer metal communication pipe is in a horn shape and is made of a material that does not react with the electrolyte of the lithium battery.

[0016] In some examples, the double-layer metal communication pipe is in a horn shape. The specific structure includes that the outer communication pipe is in a horn shape, one end of the outer communication pipe located inside the outer housing is a spherical horn pipe, and one end of the outer communication pipe extending out of the outer housing is a circular straight pipe with a gradually decreasing diameter;

[0017] The inner communication pipe is a circular straight pipe, and the pipe diameter of the inner communication pipe is smaller than that of the outer communication pipe;

[0018] At one end of the double-layer metal communication pipe located inside the outer housing, the height of the inner communication pipe is lower than that of the outer communication pipe.

[0019] In some examples, the outer wall of the outer housing is provided with threads, the inner wall of the top cover is provided with threads, and the threads of the outer housing match the threads of the top cover.

[0020] The present application provides a battery optoelectronic connector, which includes a housing body. An L-shaped recess is provided on the housing body, and a communication interface for allowing an optical fiber jumper and an electrical wire to enter the interior of a lithium battery is provided on the barrel wall at the L-shaped recess. A double-layer metal communication pipe extending outward is provided inside the housing body. One end of the double-layer metal communication pipe communicates with the interior of the housing body, and the other end communicates with the liquid injection hole of the lithium battery. The double-layer metal communication pipe includes an outer communication pipe and an inner communication pipe disposed inside the outer communication pipe. The cavity formed by the inner wall of the outer communication pipe and the outer wall of the inner communication pipe is an outer chamber cavity, and the outer chamber cavity is an optical fiber channel communicating the interior of the housing body with the liquid injection hole of the lithium battery. The inner cavity of the inner communication pipe is an inner chamber cavity, and the inner chamber cavity is an electrolyte channel communicating the interior of the housing body with the liquid injection hole of the lithium battery.

[0021] During the specific use process, when it is necessary to inject electrolyte into the lithium battery, the sealing plug is unscrewed, and the electrolyte is injected into the lithium battery through the inner chamber cavity of the inner communication pipe. When the injection is completed, the sealing plug is tightened, and the inner chamber cavity of the inner communication pipe is sealed through the thumbtack rod of the sealing plug, thereby realizing the supply of the electrolyte to the lithium battery. At the same time, the optical fiber enters the outer chamber cavity of the outer communication pipe through the optical communication interface and extends into the interior of the lithium battery; the optical fiber sensor is arranged in the top area of the optical fiber entering the interior of the lithium battery for detecting relevant parameters inside the lithium battery.

[0022] The battery optoelectronic connector provided by the present application has a simple structure and is easy to install. It can realize the monitoring of relevant parameters by using the optical fiber sensing method to enter the interior of the battery, and can be widely promoted and used in the field of lithium batteries for optical fiber sensing. Brief Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0024] Figure 1 Structural schematic of the battery optoelectronic connector of the present application Figure 1 ;

[0025] Figure 2 Structural schematic of the battery optoelectronic connector of the present application Figure 2 ;

[0026] Figure 3 Structural schematic of the battery optoelectronic connector of the present application Figure 3 ;

[0027] Figure 4 Cross-sectional view of the battery optoelectronic connector of the present application;

[0028] Figure 5 Structural schematic of the top cover of the present application;

[0029] Figure 6 This is the misalignment state diagram of the top cover and the outer housing of the present application;

[0030] Figure 7 This is the alignment state diagram of the top cover and the outer housing of the present application;

[0031] Figure 8 This is the disassembly diagram of the battery optoelectronic connector and the lithium battery of the present application.

[0032] Figure 1-8 The reference numerals in [Figure] represent: 1 - outer housing, 11 - L-shaped depression, 111 - optical communication interface, 112 - electrical communication interface, 12 - outer communication pipe, 121 - depression notch, 13 - inner communication pipe, 14 - barrier sheet, 15 - fiber coiling ring, 16 - housing through-hole group, 17 - sealing plug, 171 - thumbtack cap, 172 - thumbtack rod, 2 - top cover, 21 - notch, 22 - cover through-hole group, 3 - lithium battery, 31 - liquid injection hole, 32 - external wiring harness for optical fiber and external wire, 33 - external wiring harness for optical fiber sensor and electronic sensor, 34 - external monitoring instrument for optical fiber sensor and electronic sensor. Detailed implementation manners

[0033] A battery optoelectronic connector of the present application is installed at the position of the liquid injection port of the lithium battery electrolyte and is used for fiber optic sensing monitoring of large-capacity lithium batteries. Figure 1-3 This is the structural schematic diagram of the battery optoelectronic connector of the present application at different angles. Figure 4 This is the sectional view of the battery optoelectronic connector of the present application. As shown in combination with Figure 1-4 The battery optoelectronic connector of the present application includes an outer housing 1. The outer housing 1 is a barrel structure with one end open, and there is also an L-shaped depression 11 on the barrel wall of the outer housing 1. A communication interface is provided on the barrel wall at the L-shaped depression 11. The communication interface includes an optical communication interface 111 and an electrical communication interface 112. Among them, the optical fiber sensor implanted inside the battery and the optical fiber sensor outside the battery are connected to the external monitoring instrument through the optical communication interface 111, and the electronic sensors outside the battery are connected to the external monitoring instrument through the electrical communication interface 112.

[0034] Of course, an SC flange or an optical fiber MPO jumper connector can also be embedded at the L-shaped depression 11 as the optical communication interface 111 and the electrical communication interface 112. In this embodiment, the inside of the optical communication interface 111 is a zirconia sleeve. Of course, those skilled in the art can adjust the material and specific dimensions of the optical communication interface 111 according to actual needs, and they all fall within the protection scope of the present application.

[0035] The outer housing 1 is provided with a double-layer metal connecting pipe extending outward. One end of the double-layer metal connecting pipe is connected to the inside of the outer housing 1, and the other end is connected to the lithium battery liquid injection hole 31. During actual use, the lower end of the double-layer metal connecting pipe is inserted into the liquid injection hole 31 of the lithium battery, and the lower end of the double-layer metal connecting pipe is fixed to the battery top cover 2 of the lithium battery by welding, so that the liquid injection hole 31 of the battery top cover 2 of the lithium battery has the dual functions of electrolyte perfusion and forming an optical fiber channel at the same time.

[0036] In this application, the double-layer metal connecting pipe includes an outer connecting pipe 12 and an inner connecting pipe 13 placed inside the outer connecting pipe 12. The outer connecting pipe 12 and the inner connecting pipe 13 divide the space inside the double-layer metal connecting pipe into two relatively independent spaces. The cavity formed by the inner wall of the outer connecting pipe 12 and the outer wall of the inner connecting pipe 13 is the outer chamber cavity, and the outer chamber cavity is an optical fiber channel connecting the inside of the outer housing 1 and the lithium battery liquid injection hole 31 for the connection of optical fibers. The inner cavity of the inner connecting pipe 13 is the inner chamber cavity, and the inner chamber cavity is an electrolyte channel connecting the inside of the outer housing 1 and the lithium battery liquid injection hole 31 for the perfusion of electrolyte. After the optical fiber passes through the outer chamber cavity, multi-layer perfusion sealing can be carried out between the outer connecting pipe 12 and the inner connecting pipe 13 with silicone rubber. It should be noted that the silicone rubber includes hard silicone rubbers such as silicone power battery potting silicone rubber with good electrical insulation performance and chemical stability, and does not produce harmful gases or liquids itself.

[0037] In this example, a barrier sheet 14 is provided between the outer connecting pipe 12 and the inner connecting pipe 13, and the barrier sheet 14 is used to divide the outer chamber cavity into multiple relatively independent sub-outer chamber cavities. For example, 4 barrier sheets 14 are used to connect between the inner wall of the outer connecting pipe 12 and the outer wall of the inner connecting pipe 13, so as to divide the outer chamber cavity into 4 parts. It should be noted that those skilled in the art can set the number of barrier sheets 14 according to actual needs, such as setting up 2, 3 or 6 barrier sheets 14, which all belong to the protection scope of this application.

[0038] In this application, the double-layer metal connecting pipe is in a horn shape. The specific structure includes that the outer connecting pipe 12 is in a horn shape. One end of the outer connecting pipe 12 located inside the outer housing 1 (taking Figure 4 the shown way as the standard, the end of the outer connecting pipe 12 located inside the outer housing 1 is the upper half of the outer connecting pipe 12) is a spherical horn pipe, and one end of the outer connecting pipe 12 extending out of the outer housing 1 (taking Figure 4 the shown way as the standard, the end of the outer connecting pipe 12 extending out of the outer housing 1 is the lower half of the outer connecting pipe 12) is a circular straight pipe with a gradually decreasing diameter. The inner connecting pipe 13 is a circular straight pipe, and the pipe diameter of the inner connecting pipe 13 is smaller than that of the outer connecting pipe 12.

[0039] One end of the inner connecting pipe 13 located inside the outer housing 1 is provided with a sealing plug 17. In this application, the sealing plug 17 includes a thumbtack cap 171 with threads and a thumbtack rod 172 for inserting into the central hole of the inner connecting pipe 13. The thumbtack cap 171 and the thumbtack rod 172 are made of metals that do not react with the electrolyte, such as stainless steel or aluminum alloy. To cooperate with the opening and closing of the sealing plug 17, in this embodiment, in the upper half of the double-layer metal connecting pipe, the height of the inner connecting pipe 13 is lower than that of the outer connecting pipe 12, so that a height difference is formed between the outer connecting pipe 12 and the inner connecting pipe 13. In addition, in this application, a concave notch 121 is provided on the spherical horn pipe section of the outer connecting pipe. When the thumbtack rod 172 is inserted into the inner connecting pipe 13 for sealing, the existence of the concave notch makes the thumbtack cap 171 in a non-contact state with the outer connecting pipe, that is, there is a gap between the thumbtack cap 171 and the outer connecting pipe. When the sealing plug 17 is connected to the double-layer metal connecting pipe, the optical fiber can enter the lithium battery through the concave notch 121, thus avoiding the thumbtack cap 171 from squeezing the optical fiber.

[0040] To facilitate the opening and closing of the inner connecting pipe 13 by the sealing plug 17, in this embodiment, threads are provided on the inner wall of the outer-inner connecting pipe 13, and the threads on the inner connecting pipe 13 match the threads of the thumbtack rod 172. During actual use, the connection between the sealing plug 17 and the double-layer metal connecting pipe is realized through the threads, so as to realize the sealing and opening of the central hole of the inner connecting pipe 13. In addition, to improve the sealing performance, when covering the thumbtack cap 171, organic silicone can be coated at the connection between the thumbtack rod 172 and the inner connecting pipe 13 for sealing. A fiber coiling ring 15 is provided in the barrel of the outer housing 1, and the fiber coiling ring 15 is used for coiling and fixing the optical fiber and the electric wire in the outer housing 1. In this embodiment, the fiber coiling ring 15 is of a vertical petal structure, located at a non-central position inside the entire connector, and is composed of at least 4 or more equally sized long strip petals standing side by side. There are gaps between the petals, forming a flower plate with a circular gap, which is convenient for coiling and fixing the optical fiber and the electric wire inside the optical and electrical connector. It should be noted that those skilled in the art can adjust the number of petals according to actual needs, such as 3, 5 or 6 petals, which all fall within the protection scope of this application.

[0041] In this application, the outer housing can be made of engineering plastic materials such as PET, PBT or ABS, or can also be 3D printed. The double-layer metal connecting pipe is made of materials that do not react with the electrolyte of the lithium battery, such as stainless steel or aluminum alloy. The fiber coiling flower ring is made of flame-retardant, oil-resistant and corrosion-resistant materials such as engineering plastics, and can also be 3D printed. In addition, the double-layer metal connecting pipe is located in the exact middle of the fiber coiling ring. Of course, those skilled in the art can adjust the specific position of the double-layer metal connecting pipe inside the outer housing according to actual needs.

[0042] A top cover 2 is provided at the open end of the outer housing 1, Figure 5This is a schematic structural diagram of the top cover 2 of the present application. A notch 21 matching the L-shaped recess 11 of the outer housing 1 is provided on the side wall of the top cover 2, and the notch 21 on the top cover 2 is arranged in a staggered manner with the L-shaped recess 11 on the outer housing 1. In the present application, to protect the top cover 2 and the outer housing 1, a rubber protective sleeve covers the notch 21 on the top cover 2.

[0043] Figure 6 This is a diagram of the staggered state of the top cover 2 and the outer housing 1 of the present application. As Figure 6 shown, when there is no penetration of optical fibers and electrical wires in the non-connected state, rotate the top cover 2 so that the top cover 2 covers the L-shaped recess 11 on the outer housing 1, thereby achieving protection against water, dust, etc. for the L-shaped recess 11. Figure 7 This is a diagram of the aligned state of the top cover 2 and the outer housing 1 of the present application. As Figure 7 shown, when there is penetration of optical fibers and electrical wires in the connected state, rotate the top cover 2 so that the notch 21 on the top cover 2 corresponds to the position of the L-shaped recess 11 on the outer housing 1, ensuring that the connection interface at the L-shaped recess 11 is exposed, thereby ensuring that the optical fiber jumper and the electrical wire enter the connector and then enter the lithium battery through the connector.

[0044] In the present application, to facilitate the relative rotation of the top cover 2 and the outer housing 1, matching threads are provided at the relative positions of the outer housing 1 and the top cover 2, that is, threads are provided on the outer side wall of one end of the top cover 2 on the outer housing 1, and matching threads are provided on the outer side wall of the corresponding end of the top cover 2 on the outer housing 1. Specifically in use, by rotating the top cover 2, the relative rotation between the top cover 2 and the outer housing 1 can be achieved, thereby realizing the position adjustment of the dislocation or alignment between the L-shaped recess 11 on the outer housing 1 and the notch 21 on the top cover 2.

[0045] To further facilitate the entry of optical fibers and electrical wires into the lithium battery, in the present application, a housing through-hole group 16 for penetrating optical fibers and electrical wires is provided on the side wall of the outer housing 1. Correspondingly, a cover through-hole group 22 for penetrating optical fibers and electrical wires is provided on the side wall of the top cover 2, and the housing through-hole group 16 and the cover through-hole group 22 are arranged in a staggered manner. The staggered arrangement of the housing through-hole group 16 and the cover through-hole group 22 specifically includes: when there is no penetration of optical fibers and electrical wires in the non-connected state, rotate the top cover 2, and use the outer wall of the top cover 2 to block the housing through-hole group 16 on the outer housing 1, thereby achieving protection against water, dust, etc. for the housing through-hole group 16, as Figure 6 shown; when there is penetration of optical fibers and electrical wires in the connected state, rotate the top cover 2 so that the cover through-hole group 22 on the top cover 2 corresponds to the position of the housing through-hole group 16 on the outer housing 1, ensuring that the through-holes on the housing through-hole group 16 are exposed, thereby ensuring that the optical fiber jumper and the electrical wire enter the connector and then enter the lithium battery through the connector, as Figure 7As shown in the figure. During specific use, by rotating the top cover 2 to achieve relative rotation between the top cover 2 and the outer housing 1, the position adjustment of the housing through-hole group 16 on the outer housing 1 and the cover through-hole group 22 on the top cover 2 is realized, so as to achieve the misalignment or alignment adjustment of the housing through-hole group 16 and the cover through-hole group 22.

[0046] It should be noted that those skilled in the art can set the number of through-holes of the housing through-hole group 16 and the cover through-hole group 22 according to actual needs. For example, 1, 3 or 4 through-holes can be set respectively, and they all belong to the protection scope of this application. In this embodiment, two housing through-hole groups 16 are provided on the side wall of the outer housing 1, and the two housing through-hole groups 16 are symmetrically distributed on the side wall of the outer housing 1. Each housing through-hole group 16 includes an optical fiber through-hole for passing through an optical fiber and a wire through-hole for passing through an electric wire. Two cover through-hole groups 22 are provided on the side wall of the top cover 2, and the two cover through-hole groups 22 are symmetrically distributed on the side wall of the top cover 2. Each cover through-hole group 22 includes an optical fiber through-hole for passing through an optical fiber and a wire through-hole for passing through an electric wire. During specific use, the optical fiber sensor (including temperature, strain, pressure, gas, etc.) attached to the lithium battery housing and the external optical path are connected through the optical fiber through-holes and wire through-holes on the outer housing 1 and the top cover 2, and the electronic sensors (including temperature, strain, pressure, etc.) arranged on the outer surface of the lithium battery and the external circuit are connected, so as to realize the shared function of optical fiber sensing and electronic sensing.

[0047] To facilitate better understanding of this technical solution by those skilled in the art, the following further describes the application process of the battery optoelectronic connector in a lithium battery. When applying the battery optoelectronic connector to a lithium battery, the double-layer metal connecting pipe is inserted into the liquid injection hole 31 of the lithium battery. To protect the battery safety, the insertion depth of the double-layer metal connecting pipe is very small, and it is sealed and welded to the upper cover housing of the lithium battery. Figure 8 This is the disassembly diagram of the battery optoelectronic connector of this application and the lithium battery, as Figure 8As shown, when it is necessary to inject electrolyte into the lithium battery, the sealing plug 17 is unscrewed, and the electrolyte is injected into the lithium battery 3 through the inner chamber of the inner connecting pipe 13. When the injection is completed, the sealing plug 17 is tightened, and the inner chamber of the inner connecting pipe 13 is sealed through the thumbtack rod 172 of the sealing plug 17, thereby realizing the supply of the electrolyte to the lithium battery. At the same time, the external monitoring instrument 34 of the optical fiber sensor and the electronic sensor enters the outer housing through the optical communication interface 111 or the electrical communication interface 112 by using the outer wiring harness 32 of the optical fiber and the external wire. Among them, the optical fiber enters the outer chamber of the outer connecting pipe 12 after being coiled, and extends into the lithium battery along the concave notch 121. By arranging the optical fiber sensor at the top of the optical fiber, the relevant parameters inside the lithium battery are detected; and the wire entering the outer housing is coiled inside and then passes through the housing through-hole group 16 to penetrate out of the outer housing and is connected to the electronic sensor installed outside the lithium battery, thereby detecting the relevant parameters of the lithium battery housing. It should be noted that this example takes the lithium battery as an example, but the battery optical and electrical connector of the present application can also be used for other batteries that need to monitor the relevant parameters inside the battery, such as sodium batteries, etc. The applicable battery types will not be limited one by one here.

[0048] The above is an example of the best implementation mode of the present application, and the parts not described in detail are the common general knowledge of those skilled in the art. The protection scope of the present application shall be subject to the content of the claims, and any equivalent transformation based on the technical inspiration of the present application is also within the protection scope of the present application.

Claims

1. A battery optoelectronic connector, characterized in that, It includes a housing (1), the housing (1) is a barrel structure with one end open, an L-shaped recess (11) is provided on the barrel wall of the housing (1), and a light communication interface (111) for the optical fiber to enter the battery interior and an electrical communication interface (112) for connecting an external electronic sensor of the battery are provided on the barrel wall at the L-shaped recess (11). A double-layer metal connecting pipe extending outward is provided inside the housing (1). One end of the double-layer metal connecting pipe communicates with the interior of the housing (1), and the other end communicates with the battery liquid injection hole (31). The double-layer metal connecting pipe includes an outer connecting pipe (12) and an inner connecting pipe (13) placed inside the outer connecting pipe (12). The cavity formed by the inner wall of the outer connecting pipe (12) and the outer wall of the inner connecting pipe (13) is the outer chamber cavity, and the outer chamber cavity is an optical fiber channel connecting the interior of the housing (1) and the battery liquid injection hole (31). The inner cavity of the inner connecting pipe (13) is the inner chamber cavity, and the inner chamber cavity is an electrolyte channel connecting the interior of the housing (1) and the battery liquid injection hole (31).

2. The battery photoelectric connector according to claim 1, characterized in that, A top cover (2) is provided at the open end of the housing (1). A notch (21) matching the L-shaped recess (11) of the housing (1) is provided on the side wall of the top cover (2), and the notch (21) on the top cover (2) is arranged in a staggered manner with the L-shaped recess (11) on the housing (1).

3. The battery optoelectronic connector according to claim 2, wherein, A housing through-hole group (16) for penetrating the optical fiber and the electrical wire is provided on the side wall of the housing (1), and a cover through-hole group (22) for penetrating the optical fiber and the electrical wire is provided on the side wall of the top cover (2). The housing through-hole group (16) and the cover through-hole group (22) are arranged in a staggered manner.

4. The battery optoelectronic connector according to claim 3, characterized in that, Two housing through-hole groups (16) are provided on the side wall of the housing (1), and the two housing through-hole groups (16) are symmetrically distributed on the side wall of the housing (1). Each housing through-hole group (16) includes an optical fiber through-hole for penetrating the optical fiber and a wire through-hole for penetrating the electrical wire. Two cover through-hole groups (22) are provided on the side wall of the top cover (2), and the two cover through-hole groups (22) are symmetrically distributed on the side wall of the top cover (2). Each cover through-hole group (22) includes an optical fiber through-hole for penetrating the optical fiber and a wire through-hole for penetrating the electrical wire.

5. The battery optoelectronic connector according to claim 1, characterized in that, A fiber coiling ring (15) is provided inside the barrel of the housing (1), and the fiber coiling ring (15) is used for coiling and fixing the optical fiber and the electrical wire inside the housing (1).

6. The battery optoelectronic connector according to claim 1, characterized in that, A barrier sheet (14) is provided between the outer connecting pipe (12) and the inner connecting pipe (13), and the barrier sheet (14) is used for dividing the outer chamber cavity into multiple relatively independent sub-outer chamber cavities.

7. The battery optoelectronic connector according to claim 1, characterized in that, A sealing plug (17) is provided at one end of the inner connecting pipe (13) located inside the housing (1).

8. The battery optoelectronic connector according to claim 1, characterized in that The double-layer metal connecting pipe is in a horn shape and is made of a material that does not react with the electrolyte of the lithium battery.

9. The battery optoelectronic connector according to claim 8, characterized in that, The double-layer metal connecting pipe is in a horn shape. The specific structure includes that the outer connecting pipe (12) is in a horn shape. One end of the outer connecting pipe (12) located inside the outer shell (1) is a spherical horn pipe, and one end of the outer connecting pipe (12) extending out of the outer shell (1) is a circular straight pipe with a gradually decreasing diameter. The inner connecting pipe (13) is a circular straight pipe, and the pipe diameter of the inner connecting pipe (13) is smaller than that of the outer connecting pipe (12). At one end of the double-layer metal connecting pipe located inside the outer shell (1), the height of the inner connecting pipe (13) is lower than that of the outer connecting pipe (12).

10. The battery optoelectronic connector according to claim 2, wherein The outer wall of the outer shell (1) is provided with threads, and the inner wall of the top cover (2) is provided with threads. The threads of the outer shell (1) match the threads of the top cover (2).

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