Liquid injection device, liquid injection equipment and electric box production line

Abstract

The embodiment of the utility model provides a liquid injection device, liquid injection equipment and an electric box production line. The liquid injection device comprises a body, an exhaust pipe, a liquid injection pipe and a filter part. The body comprises a first containing cavity with a first opening, the first opening is used for being communicated with the interior of an electric box, and the body is provided with a first mounting hole and a second mounting hole which are communicated with the first containing cavity. One end of the exhaust pipe is mounted in the first mounting hole, and the other end is connected with negative pressure equipment. The liquid injection pipe is inserted into the second mounting hole and comprises a first section and a second section which are connected with each other, at least part of the first section is arranged in the first containing cavity, and the second section is used for being connected with the containing device. The filtering piece is arranged in the first containing cavity and is configured to allow gas to pass through and block liquid to pass through when the exhaust pipe extracts air in the first containing cavity. The liquid injection efficiency of the electric box is improved.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a liquid injection device, liquid injection equipment and an electrical box production line. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor related to their development.

[0003] In the development of battery technology, how to improve the filling efficiency of the battery box is a technical problem that needs to be solved urgently. Utility Model Content

[0004] The present application provides a liquid injection device, liquid injection equipment and an electrical box production line, which can improve the liquid injection efficiency of the electrical box.

[0005] This application is achieved through the following technical solutions:

[0006] The present application provides a liquid injection device for injecting liquid into an electrical box, the liquid injection device comprising a main body, an air extraction pipe, a liquid injection pipe and a filter. The main body comprises a first accommodating chamber having a first opening, the first opening being used to communicate with the interior of the electrical box, and the main body is provided with a first mounting hole and a second mounting hole communicating with the first accommodating chamber. One end of the air extraction pipe is mounted on the first mounting hole, and the other end is used to connect to a negative pressure device. The liquid injection pipe is inserted into the second mounting hole, the liquid injection pipe comprising a first section and a second section connected to each other, at least a portion of the first section being disposed in the first accommodating chamber, and the second section being used to connect to the accommodating device. The filter is disposed in the first accommodating chamber, and the filter is configured to allow gas to pass through and block liquid from passing through when the air extraction pipe extracts air in the first accommodating chamber.

[0007] The technical solution of the embodiment of the present application is to inject liquid into the interior of the electrical box through an injection tube, and at the same time, the first opening connects the interior of the electrical box with the first accommodating chamber of the main body, so that when the exhaust pipe draws air from the first accommodating chamber, it can evacuate the interior of the electrical box, and pass the gas through the filter element while blocking the liquid, thereby achieving simultaneous exhaust and injection, thereby improving the injection efficiency and thus improving the production efficiency of the electrical box.

[0008] In some embodiments, the filter element blocks the first mounting hole.

[0009] The technical solution of the embodiment of the present application blocks the first mounting hole by the filter element, thereby reducing the risk of liquid blocking the vacuum pipe when the vacuum pipe is pumping air, so that the vacuum pipe has a better pumping effect, thereby improving the liquid injection efficiency.

[0010] In some embodiments, the main body includes a first part and a second part, the first part and the second part are connected to jointly define a first accommodating cavity, the first mounting hole and the second mounting hole are both arranged in the first part, the first opening is arranged in the second part, and the second part is used to connect with the electrical box.

[0011] According to the technical solution of the embodiment of the present application, the first part and the second part are connected to jointly define a first accommodating cavity, and are connected to the electrical box through the second part, so that the liquid injection device has better stability when injecting liquid and pumping air, thereby improving the reliability of the liquid injection device during operation.

[0012] In some embodiments, the first accommodating chamber includes a first sub-chamber and a second sub-chamber that are interconnected, the inner wall of the first portion and the second portion enclose the first sub-chamber, and the second sub-chamber runs through the second portion;

[0013] The filter element is arranged in the first sub-chamber, and the filter element is filled between the inner wall of the first part and the outer wall of the liquid injection tube.

[0014] The technical solution of the embodiment of the present application arranges the filter element in the first sub-chamber, and fills the filter element between the inner wall of the first part and the outer wall of the injection tube, further reducing the risk of liquid blocking the vacuum tube when the vacuum tube is pumping air, so that the vacuum tube has a better pumping effect, thereby improving the injection efficiency.

[0015] In some embodiments, one end of the first section is located in the first sub-chamber, and the other end of the first section is located in the second sub-chamber, a first gas flow channel is formed between the injection tube and the inner wall of the first sub-chamber, a second gas flow channel is formed between the injection tube and the inner wall of the second sub-chamber, and the first gas flow channel is connected to the second gas flow channel.

[0016] The technical solution of the embodiment of the present application is connected through the first gas flow channel and the second gas flow channel, so that when the vacuum tube evacuates the first accommodating chamber, the interior of the electrical box can be evacuated through the first gas flow channel and the second gas flow channel, so that the vacuum tube has a better vacuum effect, thereby improving the liquid injection efficiency.

[0017] In some embodiments, the first portion has a first wall away from the second portion, and the first mounting hole and the second mounting hole are both disposed on the first wall.

[0018] According to the technical solution of the embodiment of the present application, the first mounting hole and the second mounting hole are arranged on the first wall, that is, the exhaust pipe is arranged on the first wall, so that the distance between the first wall and the first opening is relatively far. When the exhaust pipe is exhausting air, the distance between the liquid and the exhaust pipe after the liquid is drawn into the first accommodating chamber from the first opening is relatively far, which further reduces the risk of the liquid blocking the exhaust pipe when the exhaust pipe is exhausting air, so that the exhaust pipe has a better exhaust effect, thereby improving the liquid injection efficiency.

[0019] In some embodiments, the second portion has a second wall away from the first portion, the first opening is provided on the second wall, and the second wall is used to be connected to the electrical box.

[0020] The technical solution of the embodiment of the present application sets the first opening on the second wall, and the second wall is set away from the second part, so that the distance between the first opening and the exhaust pipe is far, further reducing the risk of liquid blocking the exhaust pipe when the exhaust pipe is exhausting air. At the same time, the second wall is connected to the electrical box, so that the first opening is connected to the inside of the electrical box.

[0021] In some embodiments, the second wall is further provided with a connecting hole, and the liquid injection device further includes a connecting piece, and the connecting piece is passed through the connecting hole to be connected to the electrical box.

[0022] The technical solution of the embodiment of the present application improves the reliability of the connection between the injection device and the electrical box by passing the connecting piece through the connecting hole and connecting with the electrical box.

[0023] In some embodiments, the first part has a first end surface facing the second part, the first end surface is provided with a positioning groove, one end of the second part extends into the positioning groove, and the second part is detachably connected to the first part.

[0024] The technical solution of the embodiment of the present application is facilitated by the detachable connection between the first part and the second part, and the connection with the electrical box through the second part, so as to facilitate the installation of the liquid injection device and improve the installation efficiency of the liquid injection device.

[0025] In some embodiments, the injection device also includes a limit member, the positioning groove has a first limit surface facing the second part, the second part has a second limit surface facing the first part, the limit member is arranged between the first limit surface and the second limit surface, and the limit member is in contact with the filter element.

[0026] The technical solution of the embodiment of the present application is that a limit member is arranged between the first limit surface and the second limit surface, and the limit member is in contact with the filter element, so that the limit member can reduce the risk of movement of the filter element, improve the stability of the installation of the filter element, thereby reducing the risk of liquid blocking the vacuum tube when the vacuum tube is pumping air, so that the vacuum tube has a better vacuum effect, thereby improving the liquid injection efficiency.

[0027] In some embodiments, the injection device further includes a sealing member disposed at a connection between the first portion and the second portion.

[0028] The technical solution of the embodiment of the present application reduces the risk of liquid leakage from the first accommodating chamber by providing a seal, while also reducing the risk of air entering the first accommodating chamber and affecting the air extraction by the exhaust pipe.

[0029] In some embodiments, an end of the first segment away from the second segment extends out from the first opening.

[0030] According to the technical solution of the embodiment of the present application, one end of the first section of the injection tube extends from the first opening, which reduces the risk of liquid blocking the first opening during injection and thus affecting the gas inside the electrical box from entering the first accommodating chamber through the first opening, thereby enabling the exhaust tube to have a better exhaust effect.

[0031] In some embodiments, the first section is located in the first accommodating cavity, and the injection device further includes a connecting tube, one end of which is connected to an end of the first section away from the second section, and the other end of the connecting tube extends from the first opening.

[0032] The technical solution of the embodiment of the present application connects the injection pipe through a connecting pipe, and injects liquid into the interior of the electrical box through the connecting pipe, which improves the reliability of the injection and also makes the injection device have better applicability.

[0033] The present application also provides a liquid injection device, comprising a containing device and the liquid injection device of any of the above embodiments. The containing device is used to contain the heat exchange medium, and the containing device is connected to the second section.

[0034] The present application also provides an electrical box production line, comprising the liquid injection equipment of any of the above embodiments.

[0035] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A schematic diagram of the assembly structure of the liquid injection device and the electrical box provided in some embodiments of the present application;

[0038] Figure 2 An exploded view of a liquid injection device provided in some embodiments of the present application;

[0039] Figure 3 A schematic diagram of the structure of a liquid injection device provided in some embodiments of the present application;

[0040] Figure 4 A schematic diagram of the structure of a liquid injection device provided in some other embodiments of the present application;

[0041] Figure 5 This is a schematic diagram of the structure of the body of some embodiments of the present application;

[0042] Figure 6 This is a schematic diagram of the structure of the first part of some embodiments of the present application;

[0043] Figure 7 This is a schematic structural diagram of the second part of some embodiments of the present application.

[0044] Icons: 1-liquid injection device; 10-main body; 11-first opening; 12-first accommodating chamber; 13-first mounting hole; 14-second mounting hole; 15-first part; 151-first wall; 152-first end face; 153-positioning groove; 154-first limiting surface; 16-second part; 161-second wall; 162-connecting hole; 163-connecting piece; 164-second limiting surface; 17-first sub-chamber; 171-first gas flow channel; 18-second sub-chamber; 181-second gas flow channel; 20-exhaust pipe; 30-liquid injection pipe; 31-first section; 32-second section; 40-filter element; 50-limiting piece; 60-sealing element; 70-connecting pipe; 1000-electrical box. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0046] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0047] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0048] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, D and / or E can represent: D exists alone, D and E exist at the same time, and E exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0050] The term "multiple" as used in this application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple sheets" refers to more than two sheets (including two sheets).

[0051] In some embodiments, the battery may be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0052] In some embodiments, the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are accommodated in the case.

[0053] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0054] In some embodiments, the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0055] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0056] The battery cells may be, but are not limited to, lithium ion batteries, sodium ion batteries, sodium lithium ion batteries, lithium metal batteries, sodium metal batteries, lithium sulfur batteries, magnesium ion batteries, nickel hydrogen batteries, nickel cadmium batteries, lead storage batteries, etc.

[0057] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a polygonal prismatic battery, such as a hexagonal prismatic battery, etc. There is no particular limitation in the embodiments of the present application.

[0058] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and removed between the positive electrode and the negative electrode. The separator is set between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0059] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0060] In some embodiments, the housing includes an end cap and a shell, the shell is provided with a first opening, and the end cap closes the first opening to form a closed space for accommodating substances such as the electrode assembly and the electrolyte. The shell may be provided with one or more first openings. One or more end caps may also be provided.

[0061] In some embodiments, at least one electrode terminal is disposed on the housing, and the electrode terminal is electrically connected to the electrode tab of the electrode assembly. The electrode terminal may be directly connected to the electrode tab, or may be indirectly connected to the electrode tab through an adapter. The electrode terminal may be disposed on the end cap, or may be disposed on the housing.

[0062] In some embodiments, an explosion-proof valve is provided on the housing, and the explosion-proof valve is used to release the internal pressure of the battery cell.

[0063] At present, from the perspective of market development, batteries have been widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as electric tools, drones, energy storage equipment, etc. With the continuous expansion of battery application areas, the market demand is also constantly expanding.

[0064] The development of battery technology must take into account many design factors at the same time, such as energy density, cycle life, discharge capacity, charge and discharge rate and other performance parameters. In addition, as environmental conditions and / or battery internal conditions change, the filling efficiency of the battery box is also one of the key factors to consider.

[0065] At present, multiple batteries, battery modules or battery cells are assembled into a box to form an electric box. In order to achieve heat exchange inside the electric box, a heat exchange medium is injected into the electric box. The heat exchange medium can be coolant or other liquids. In order to facilitate liquid injection, the inside of the electric box is evacuated before liquid injection.

[0066] In the related art, the liquid injection device is usually a device that integrates air extraction and liquid injection. Before liquid injection, the inside of the electric box is evacuated through the air extraction pipe, and then liquid is injected into the electric box through the liquid injection pipe. This liquid injection method has a low injection efficiency. If the electric box is evacuated and liquid is injected at the same time through the liquid injection device, the air extraction pipe will extract the injected liquid, thereby blocking the air extraction pipe, affecting the air extraction, and thus affecting the liquid injection efficiency of the electric box.

[0067] Based on the above considerations, in order to solve the problem of low liquid injection efficiency of the electric box, an embodiment of the present application provides a liquid injection device, which includes a body, an air extraction pipe, a liquid injection pipe and a filter. The body includes a first accommodating chamber with a first opening, the first opening is used to communicate with the interior of the electric box, the air extraction pipe is connected to the first accommodating chamber of the body through a first mounting hole, the liquid injection pipe is used to inject liquid into the interior of the electric box, and the air extraction pipe extracts air from the first accommodating chamber to evacuate the interior of the electric box. Among them, the filter blocks the first mounting hole, and the filter allows gas to pass through and blocks liquid.

[0068] When the exhaust pipe extracts the air in the first accommodating chamber, it can exhaust the inside of the electrical box, and pass the gas through the filter and block the liquid, so as to realize exhaust and liquid injection at the same time, improve the liquid injection efficiency, and thus improve the production efficiency of the electrical box.

[0069] The liquid injection device disclosed in the embodiment of the present application can be used for, but not limited to, liquid injection and air extraction of an electrical box, and can also be used for liquid injection and air extraction of other battery components, and can also be used for other equipment or devices that require liquid injection, etc.

[0070] An embodiment of the present application provides an electrical box production line including a liquid injection device. The electrical box production line can be used to produce electrical boxes, and can also be used in various processes of battery production, such as electrode assemblies to form battery cells, battery cell assembly to form batteries, etc.

[0071] Please refer to Figures 1 to 4 , Figure 1 A schematic diagram of the assembly structure of the liquid injection device and the electrical box provided in some embodiments of the present application; Figure 2 An exploded view of a liquid injection device provided in some embodiments of the present application; Figure 3 A schematic diagram of the structure of a liquid injection device provided in some embodiments of the present application; Figure 4 This is a schematic diagram of the structure of the liquid injection device provided in some other embodiments of the present application. Figure 1 , Figure 3 and Figure 4 The seal is not marked; Figure 1 The part where the electric box is connected to the liquid injection device is shown; Figure 2 Only one connector is shown as a schematic diagram; in order to facilitate the display of the filter, Figure 3 and Figure 4 A gap is shown between the circumferential surface of the filter and the inner wall of the body. The embodiment of the present application provides a liquid injection device 1 for injecting liquid into the electrical box 1000, and the liquid injection device 1 includes a body 10, an air extraction pipe 20, an injection pipe 30 and a filter 40. The body 10 includes a first accommodating chamber 12 with a first opening 11, and the first opening 11 is used to communicate with the interior of the electrical box 1000. The body 10 is provided with a first mounting hole 13 and a second mounting hole 14 that are connected to the first accommodating chamber 12. One end of the air extraction pipe 20 is installed in the first mounting hole 13, and the other end is used to connect the negative pressure device. The injection pipe 30 is inserted in the second mounting hole 14, and the injection pipe 30 includes a first section 31 and a second section 32 that are connected to each other. At least part of the first section 31 is arranged in the first accommodating chamber 12, and the second section 32 is used to connect the accommodating device. The filter 40 is arranged in the first accommodating chamber 12, and the filter 40 is configured to allow gas to pass through and block liquid from passing through when the air extraction pipe 20 extracts air in the first accommodating chamber 12.

[0072] In some embodiments, the electric box 1000 may be formed by accommodating the battery pack in an external accommodating box.

[0073] In some embodiments, the size of the container can be determined according to the standard of a container. For example, the width of the container can be 2438 mm, the length can be 12192 mm, 9125 mm, 6058 mm, 2991 mm, and the height can be 2896 mm, 2591 mm, 2438 mm.

[0074] In some embodiments, the material of the containment box may be the same as that of the container, and the material refers to the material of the main body of the container, that is, the material of each wall of the containment box, for example, the material may be stainless steel, aluminum alloy, etc.

[0075] In some embodiments, there may be multiple battery packs, and the multiple battery packs may fill the interior of the container as much as possible to give full play to the size, load capacity, etc. of the container.

[0076] In some embodiments, the load capacity of the container may conform to the standards of a container, and the load capacity may be 30 tons, 20 tons, 10 tons, 5 tons, 2.5 tons, etc.

[0077] In some embodiments, the battery pack may be a battery, a battery cell, or a battery module.

[0078] In some embodiments, the liquid injected into the electrical box 1000 by the liquid injection device 1 is used as a heat exchange medium for the battery pack inside the electrical box 1000 .

[0079] In some embodiments, the liquid injected into the electrical box 1000 by the liquid injection device 1 may be a coolant.

[0080] In some embodiments, the exhaust pipe 20 can be installed in the first installation hole 13 through an adapter.

[0081] In some embodiments, the injection tube 30 includes a first section 31 and a second section 32. One end of the second section 32 can be set in the second mounting hole 14 and connected to the second mounting hole 14 through an adapter. The other end of the second section 32 is connected to an external containing device for injection.

[0082] In some embodiments, the first section 31 and the second section 32 may be directly connected or may be connected through the second mounting hole 14 .

[0083] In some embodiments, the filter 40 may be a reverse sponge material or other granular material to allow air to pass through while blocking liquid.

[0084] In some embodiments, the first accommodating chamber 12 can be connected to the interior of the electrical box 1000 through the first opening 11. While liquid is injected through the injection tube 30, the exhaust pipe 20 evacuates the first accommodating chamber 12 and extracts the air inside the electrical box 1000 at the same time.

[0085] Before liquid injection, the amount of liquid injection is usually determined according to the capacity inside the container. During liquid injection, the liquid usually produces water mist. In some embodiments, the liquid injection pipe 30 is used to inject liquid while the air extraction pipe 20 is used to extract air, thereby saving liquid injection time. The saved liquid injection time can be used to place the liquid injection device 1 still so that the water mist is re-liquefied and then flows to the electrical box 1000, thereby improving the liquid injection accuracy.

[0086] In some embodiments, during liquid injection, the liquid injection device 1 can be disposed above the electrical box 1000 to inject liquid into the interior of the electrical box 1000 from above.

[0087] In some embodiments, the receiving device may have a chamber containing a heat exchange medium, and the second section 32 is connected to the receiving device, that is, the second section 32 may be connected to the interior of the receiving device to facilitate the transportation of the heat exchange medium.

[0088] In some embodiments, the containing device may be a liquid storage tank, a liquid storage cylinder, a liquid storage bottle, etc. When the heat exchange medium is gas or other medium, the containing device may be a corresponding container.

[0089] According to the technical solution of the embodiment of the present application, liquid is injected into the interior of the electrical box 1000 through the liquid injection tube 30, and at the same time, the first opening 11 connects the interior of the electrical box 1000 with the first accommodating chamber 12 of the main body 10, so that when the exhaust pipe 20 extracts the air in the first accommodating chamber 12, the interior of the electrical box 1000 can be evacuated, and the gas passes through the filter element 40 while blocking the liquid, thereby achieving simultaneous exhaust and liquid injection, thereby improving the liquid injection efficiency, and thus improving the production efficiency of the electrical box 1000.

[0090] Please refer to Figure 1 , Figure 3 and Figure 4 In some embodiments, the filter element 40 blocks the first mounting hole 13 .

[0091] In some embodiments, the first mounting hole 13 is provided in the body 10, and the first mounting hole 13 communicates with the inside and the outside of the body 10, that is, the air extraction pipe 20 is installed in the first mounting hole 13 from the outside, and communicates with the first accommodating chamber 12. The filter element 40 is provided in the first accommodating chamber 12, and the filter element 40 blocks the first mounting hole 13, that is, the filter element 40 blocks one end of the first mounting hole 13 communicating with the first accommodating chamber 12.

[0092] The technical solution of the embodiment of the present application blocks the first mounting hole 13 through the filter element 40, thereby reducing the risk of liquid blocking the first mounting hole 13 and thus blocking the exhaust pipe 20 when the exhaust pipe 20 is exhausting air, so that the exhaust pipe 20 has a better exhaust effect, thereby improving the liquid injection efficiency.

[0093] Please refer to Figures 1 to 4 , and refer to Figures 5 and 6 , Figure 5 This is a schematic diagram of the structure of the body of some embodiments of the present application. Figure 6 This is a schematic diagram of the structure of the first part of some embodiments of the present application. In order to facilitate the display of the filter element, Figure 5 There is a gap between the circumferential surface of the filter element and the wall surface of the body, and Figure 5 In some embodiments, the body 10 includes a first portion 15 and a second portion 16, the first portion 15 and the second portion 16 are connected to define a first accommodating cavity 12, the first mounting hole 13 and the second mounting hole 14 are both provided in the first portion 15, the first opening 11 is provided in the second portion 16, and the second portion 16 is used to connect with the electrical box 1000.

[0094] In some embodiments, the first portion 15 and the second portion 16 may be fixedly connected, or the first portion 15 and the second portion 16 may be detachably connected.

[0095] In some embodiments, the first part 15 may have a chamber with an opening, and the second part 16 may also have a chamber with an opening. The first part 15 and the second part 16 are connected, and the opening of the first part 15 and the opening of the second part 16 cooperate with each other, so that the chamber of the first part 15 and the chamber of the second part 16 together form a first accommodating chamber 12.

[0096] In some embodiments, the first part 15 may have a chamber with an opening, and the second part 16 may be a plate-like member. The first part 15 and the second part 16 are connected, and the second part 16 closes the opening of the first part 15, so that the first part 15 and the second part 16 jointly define the first accommodating cavity 12.

[0097] In some embodiments, the second part 16 may have a chamber with an opening, the first part 15 may be a plate-like member, the first part 15 and the second part 16 are connected, and the first part 15 closes the opening of the second part 16, so that the first part 15 and the second part 16 jointly define the first accommodating cavity 12.

[0098] According to the technical solution of the embodiment of the present application, the first part 15 and the second part 16 are connected to jointly define the first accommodating chamber 12, and are connected to the electrical box 1000 through the second part 16, so that the liquid injection device 1 has better stability during injection and vacuuming, thereby improving the reliability of the liquid injection device 1 during operation.

[0099] Please refer to Figures 1 to 6 , and refer to Figure 7 , Figure 7 Schematic diagram of the structure of the second part of some embodiments of the present application. In some embodiments, the first accommodating chamber 12 includes a first sub-chamber 17 and a second sub-chamber 18 that are interconnected, the inner wall of the first part 15 and the second part 16 form the first sub-chamber 17, and the second sub-chamber 18 runs through the second part 16. The filter element 40 is disposed in the first sub-chamber 17, and the filter element 40 is filled between the inner wall of the first part 15 and the outer wall of the injection tube 30.

[0100] In some embodiments, the first part 15 and the second part 16 are connected, and the wall of the first part 15 can partially overlap with the wall of the second part 16, so that the inner wall of the first part 15 and the second part 16 form a first sub-chamber 17, which is also the part corresponding to the cavity of the first part 15.

[0101] In some embodiments, the cavity of the second portion 16 is also the second sub-chamber 18 , and the second sub-chamber 18 and the first sub-chamber 17 together constitute the first accommodating chamber 12 , the second sub-chamber 18 is connected to the first opening 11 , and the first sub-chamber 17 is connected to the first mounting hole 13 .

[0102] In some embodiments, the filter element 40 can be arranged in the first sub-chamber 17, and the injection tube 30 is passed through the filter element 40, so that the outer surface of the filter element 40 contacts the inner wall of the first part 15, and the inner surface of the filter element 40 contacts the outer surface of the injection tube 30, thereby reducing the risk of liquid flowing into the gap between the filter element 40 and the injection tube 30, or the gap between the filter element 40 and the inner wall of the first part 15, thereby blocking the first mounting hole 13 and affecting the air extraction.

[0103] In some embodiments, the filter element 40 may also be disposed in the second sub-chamber 18, and the injection tube 30 is still passed through the filter element 40, that is, the end of the injection tube 30 where the liquid flows out needs to be located at the end of the filter element 40 away from the first mounting hole 13, so that the injection tube 30 can be normally injected and the risk of liquid blocking the first mounting hole 13 and affecting air extraction can be reduced.

[0104] In some embodiments, the extension direction of the first sub-chamber 17 and the second sub-chamber 18 can be the same, that is, the first accommodating chamber 12 extends in one direction, and the injection tube 30 can be the same as the extension direction of the first accommodating chamber 12, thereby reducing the risk of bending the injection tube 30 and affecting the injection.

[0105] In some embodiments, the filter element 40 may be cylindrical, and the filter element 40 matches the inner wall of the first portion 15 .

[0106] According to the technical solution of the embodiment of the present application, the filter element 40 is arranged in the first sub-chamber 17, and the filter element 40 is filled between the inner wall of the first part 15 and the outer wall of the injection tube 30, which further reduces the risk of liquid blocking the vacuum tube 20 when the vacuum tube 20 is pumping air, so that the vacuum tube 20 has a better pumping effect, thereby improving the injection efficiency.

[0107] Please refer to Figures 1 to 7 In some embodiments, one end of the first section 31 is located in the first sub-chamber 17, and the other end of the first section 31 is located in the second sub-chamber 18, a first gas flow channel 171 is formed between the injection tube 30 and the inner wall of the first sub-chamber 17, and a second gas flow channel 181 is formed between the injection tube 30 and the inner wall of the second sub-chamber 18, and the first gas flow channel 171 is connected to the second gas flow channel 181.

[0108] In some embodiments, one end of the first section 31 is communicated with the second mounting hole 14 and is located in the first sub-chamber 17 .

[0109] In some embodiments, the end of the first section 31 away from the second mounting hole 14 is located in the second sub-chamber 18, and the liquid outlet of the injection tube 30 can be closer to the first opening 11 to reduce the risk of liquid blocking the first opening 11 when the injection tube 30 is injected, thereby making it difficult for the exhaust pipe 20 to extract air from the electrical box 1000.

[0110] In some embodiments, the outer diameter of the injection tube 30 may be smaller than the inner diameter of the first sub-chamber 17, so that a first gas flow channel 171 may be formed between the injection tube 30 and the inner wall of the first sub-chamber 17. The outer diameter of the injection tube 30 may be smaller than the inner diameter of the second sub-chamber 18, so that a first gas flow channel 171 may be formed between the injection tube 30 and the inner wall of the second sub-chamber 18.

[0111] In some embodiments, when the exhaust pipe 20 extracts air from the first accommodating chamber 12 , the air inside the electrical box 1000 is extracted by the exhaust pipe 20 in sequence through the first opening 11 , the second gas flow channel 181 , the first gas flow channel 171 , the filter element 40 and the first mounting hole 13 .

[0112] The technical solution of the embodiment of the present application is connected through the first gas flow channel 171 and the second gas flow channel 181, so that when the exhaust pipe 20 exhausts the first accommodating chamber 12, the interior of the electrical box 1000 can be exhausted through the first gas flow channel 171 and the second gas flow channel 181, so that the exhaust pipe 20 has a better exhaust effect, thereby improving the liquid injection efficiency.

[0113] Please refer to Figure 6 In some embodiments, the first portion 15 has a first wall 151 away from the second portion 16 , and the first mounting hole 13 and the second mounting hole 14 are both disposed on the first wall 151 .

[0114] In some embodiments, the first portion 15 and the second portion 16 may both extend in one direction, the first wall 151 is located at one end of the first portion 15 away from the second portion 16, and the first mounting hole 13 and the second mounting hole 14 are arranged on the first wall 151, thereby increasing the distance between the exhaust pipe 20 and the first opening 11.

[0115] According to the technical solution of the embodiment of the present application, the first mounting hole 13 and the second mounting hole 14 are arranged on the first wall 151, that is, the exhaust pipe 20 is arranged on the first wall 151, so that the distance between the first wall 151 and the first opening 11 is relatively far. When the exhaust pipe 20 is exhausting air, the liquid is drawn from the first opening 11 into the first accommodating chamber 12 and is at a relatively far distance from the exhaust pipe 20, which further reduces the risk of liquid blocking the exhaust pipe 20 when the exhaust pipe 20 is exhausting air, so that the exhaust pipe 20 has a better exhaust effect, thereby improving the liquid injection efficiency.

[0116] Please refer to Figure 1 and Figure 7 In some embodiments, the second portion 16 has a second wall 161 away from the first portion 15 , the first opening 11 is disposed on the second wall 161 , and the second wall 161 is used to connect with the electrical box 1000 .

[0117] In some embodiments, the first portion 15 and the second portion 16 may both extend in one direction, the second wall 161 is located at an end of the second portion 16 away from the first portion 15 , and the first opening 11 is disposed on the second wall 161 , thereby increasing the distance between the exhaust pipe 20 and the first opening 11 .

[0118] The technical solution of the embodiment of the present application sets the first opening 11 on the second wall 161, and the second wall 161 is set away from the second part 16, so that the distance between the first opening 11 and the exhaust pipe 20 is far, further reducing the risk of liquid blocking the exhaust pipe 20 when the exhaust pipe 20 is exhausting air. At the same time, the second wall 161 is connected to the electrical box 1000, so that the first opening 11 is connected to the inside of the electrical box 1000.

[0119] Please refer to Figure 2 In some embodiments, the second wall 161 is further provided with a connection hole 162 , and the injection device 1 further includes a connection member 163 , and the connection member 163 is passed through the connection hole 162 to be connected to the electrical box 1000 .

[0120] In some embodiments, the first part 15 and the second part 16 both extend in one direction, and the second part 16 has a side wall extending in this direction and connected to the first part 15, the side wall encloses a chamber with an opening, and the second wall 161 closes the opening and is projected along the extension direction of the second part 16, the projection of the second wall 161 covers the projection of the side wall, that is, the second wall 161 extends beyond a portion of the side wall, and the exceeding portion is used to set the connecting hole 162.

[0121] In some embodiments, the connecting member 163 may be a bolt, a screw, or the like.

[0122] In some embodiments, the outer surface of the electrical box 1000 may be provided with a hole matching the connector 163 .

[0123] In some embodiments, the number of the connection holes 162 and the number of the connection members 163 may be the same. There may be multiple connection holes 162 , and the multiple connection holes 162 may be symmetrically arranged relative to the first opening 11 , or circumferentially arranged around the axis of the first opening 11 .

[0124] In some embodiments, the second wall 161 can be a flat plate. The liquid injection device 1 can be connected to the upper end of the electric box 1000. When connected, the second wall 161 can fit the upper end of the electric box 1000, and the upper end of the electric box 1000 is provided with a through hole matching the first opening 11, so as to facilitate liquid injection and air extraction, while reducing the risk of air entering through the gap between the electric box 1000 and the second wall 161 to affect air extraction.

[0125] The technical solution of the embodiment of the present application improves the reliability of the connection between the liquid injection device 1 and the electric box 1000 by having the connecting piece 163 pass through the connecting hole 162 and then connect to the electric box 1000.

[0126] Please refer to Figures 5 to 7 In some embodiments, the first portion 15 has a first end surface 152 facing the second portion 16 , the first end surface 152 is provided with a positioning groove 153 , one end of the second portion 16 extends into the positioning groove 153 , and the second portion 16 is detachably connected to the first portion 15 .

[0127] In some embodiments, the first part 15 has a first end face 152, and the first end face 152 is provided with an opening and a positioning groove 153, the second part 16 extends into the positioning groove 153 and is connected to the first part 15, and at the same time, the chamber of the first part 15 and the chamber of the second part 16 are connected through the opening, thereby forming a first accommodating cavity 12.

[0128] In some embodiments, one end of the second part 16 extends into the positioning groove 153, wherein the end surface of the second part 16 connected to the positioning groove 153 can abut against the wall surface of the positioning groove 153, so that the injection device 1 has better sealing performance, thereby reducing the risk of liquid leakage and air leakage in the first accommodating chamber 12.

[0129] In some embodiments, after one end of the second portion 16 extends into the positioning groove 153 , a detachable connection can be achieved by a bolt or a screw.

[0130] The volume of the electrical box 1000 is relatively large, so the volume of the air extraction pipe 20 and the liquid injection pipe 30 of the liquid injection device 1 is also relatively large. In order to facilitate the installation of the liquid injection device 1. In some embodiments, the second part 16 can be connected to the electrical box 1000 first, and then the first part 15 and the second part 16 can be connected, so as to realize the connection between the liquid injection device 1 and the electrical box 1000, reducing the difficulty of installation.

[0131] The technical solution of the embodiment of the present application is that the first part 15 is detachably connected to the second part 16, and is connected to the electrical box 1000 through the second part 16, which facilitates the installation of the liquid injection device 1 and improves the installation efficiency of the liquid injection device 1.

[0132] Please refer to Figure 1 to Figure 2 , Figure 6 to Figure 7 In some embodiments, the injection device 1 also includes a limit member 50, the positioning groove 153 has a first limit surface 154 facing the second part 16, the second part 16 has a second limit surface 164 facing the first part 15, the limit member 50 is arranged between the first limit surface 154 and the second limit surface 164, and the limit member 50 is in contact with the filter element 40.

[0133] In some embodiments, the filter element 40 may abut against the inner wall of the first portion 15. One end of the stopper 50 may contact the first stopper surface 154, and the other end of the stopper 50 may contact the second stopper surface 164. The filter element 40 contacts the stopper 50, and the end of the filter element 40 away from the stopper 50 may contact the first wall 151, thereby achieving the limit of the filter element 40.

[0134] In some embodiments, the limiting member 50 may be made of stainless steel, plastic or other materials.

[0135] In some embodiments, the stopper 50 may be a plate, and in order to reduce the risk of the stopper 50 affecting the gas flow, a hole for gas to pass may be provided on the stopper 50. The number of holes may be one, and the inner diameter of the hole may be set larger. The hole diameter of the hole may also be set smaller, and the number of holes may be set to be multiple.

[0136] According to the technical solution of the embodiment of the present application, the limit member 50 is arranged between the first limit surface 154 and the second limit surface 164, and the limit member 50 is in contact with the filter element 40, so that the limit member 50 can reduce the risk of movement of the filter element 40, improve the stability of the installation of the filter element 40, thereby reducing the risk of liquid blocking the exhaust pipe 20 when the exhaust pipe 20 is exhausting air, so that the exhaust pipe 20 has a better exhaust effect, thereby improving the liquid injection efficiency.

[0137] Please refer to Figure 1 to Figure 2 In some embodiments, the liquid injection device 1 further includes a sealing member 60 , which is disposed at the connection between the first portion 15 and the second portion 16 .

[0138] In some embodiments, the sealing member 60 may be disposed between the second limiting surface 164 and the limiting member 50 .

[0139] The technical solution of the embodiment of the present application reduces the risk of liquid leakage from the first accommodating chamber 12 by providing a seal 60 , and also reduces the risk of air entering the first accommodating chamber 12 and affecting the air extraction by the exhaust pipe 20 .

[0140] Please refer to Figure 3 In some embodiments, an end of the first segment 31 away from the second segment 32 extends out from the first opening 11 .

[0141] In some embodiments, one end of the first section 31 away from the second section 32 can extend from the first opening 11 , and when the injection device 1 is connected to the electrical box 1000 , the first section 31 can extend into the interior of the electrical box 1000 .

[0142] According to the technical solution of the embodiment of the present application, one end of the first section 31 of the injection tube 30 extends out from the first opening 11, thereby reducing the risk of liquid blocking the first opening 11 during injection, thereby affecting the gas inside the electrical box 1000 from entering the first accommodating chamber 12 through the first opening 11, so that the exhaust pipe 20 has a better exhaust effect.

[0143] Please refer to Figure 4 In some embodiments, the first section 31 is located in the first accommodating chamber 12 , and the injection device 1 further includes a connecting tube 70 , one end of the connecting tube 70 is connected to an end of the first section 31 away from the second section 32 , and the other end of the connecting tube 70 extends from the first opening 11 .

[0144] In some embodiments, the connecting tube 70 can be connected to the injection tube 30 through an adapter.

[0145] In some embodiments, when the liquid injection device 1 is connected to the electrical box 1000 , the connecting tube 70 may extend from the first opening 11 and extend into the interior of the electrical box 1000 .

[0146] The technical solution of the embodiment of the present application connects the injection tube 30 via the connecting tube 70, and injects liquid into the interior of the electrical box 1000 via the connecting tube 70, thereby improving the reliability of the injection and also making the injection device 1 have better applicability.

[0147] The present application also provides a liquid injection device, comprising a containing device and the liquid injection device 1 of any one of the above embodiments. The containing device is used to contain the heat exchange medium, and the containing device is connected to the second section 32 .

[0148] An embodiment of the present application also provides an electrical box 1000 production line, including a liquid injection device according to any of the above embodiments.

[0149] Please refer to Figures 1 to 3 In some embodiments, the liquid injection device 1 includes a body 10, an air extraction pipe 20, a liquid injection pipe 30 and a filter 40. The body 10 includes a first accommodating chamber 12 having a first opening 11, and the body 10 is provided with a first mounting hole 13 and a second mounting hole 14 communicating with the first accommodating chamber 12. The liquid injection pipe 30 is inserted into the second mounting hole 14 and passes through the first accommodating chamber 12 and out of the first opening 11. When injecting liquid, one end of the liquid injection pipe 30 passing through the first opening 11 extends into the interior of the electrical box 1000.

[0150] In some embodiments, the exhaust pipe 20 is connected to the first mounting hole 13. When injecting liquid, the first accommodating chamber 12 is connected to the interior of the electric box 1000 through the first opening 11, and the exhaust pipe 20 extracts air from the first accommodating chamber 12 to extract air from the electric box 1000.

[0151] In some embodiments, the filter element 40 is disposed in the first accommodating chamber 12 , and the filter element 40 fills the space between the outer wall of the injection tube 30 and the outer wall of the body 10 , and the filter element 40 blocks the first mounting hole 13 .

[0152] According to the technical solution of the embodiment of the present application, the liquid injection device 1 can realize exhaust gas while injecting liquid, and the filter element 40 blocks the liquid while passing the gas, thereby reducing the risk of liquid blocking the first mounting hole 13 and affecting the exhaust gas of the exhaust pipe 20, thereby improving the liquid injection efficiency and thus improving the production efficiency of the electrical box 1000.

[0153] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A liquid injection device for injecting liquid into an electrical box, characterized in that: include: A body, comprising a first accommodating cavity having a first opening, wherein the first opening is used to communicate with the interior of the electrical box, and the body is provided with a first mounting hole and a second mounting hole communicating with the first accommodating cavity; An exhaust pipe, one end of which is mounted on the first mounting hole, and the other end of which is used to connect to a negative pressure device; A liquid injection pipe, inserted into the second mounting hole, the liquid injection pipe comprises a first section and a second section connected to each other, at least a portion of the first section is disposed in the first accommodating cavity, and the second section is used to connect to the accommodating device; A filter element is disposed in the first accommodating chamber, and the filter element is configured to allow gas to pass through and block liquid from passing through when the air extraction pipe extracts air in the first accommodating chamber.

2. The liquid injection device according to claim 1, characterized in that: The filter element blocks the first mounting hole.

3. The liquid injection device according to any one of claims 1 to 2, characterized in that: The body includes a first part and a second part, the first part and the second part are connected to jointly define the first accommodating cavity, the first mounting hole and the second mounting hole are both arranged in the first part, the first opening is arranged in the second part, and the second part is used to connect with the electrical box.

4. The liquid injection device according to claim 3, characterized in that: The first accommodating chamber comprises a first sub-chamber and a second sub-chamber which are interconnected, the inner wall of the first part and the second part enclose the first sub-chamber, and the second sub-chamber passes through the second part; The filter element is disposed in the first sub-chamber, and the filter element is filled between the inner wall of the first portion and the outer wall of the liquid injection tube.

5. The liquid injection device according to claim 4, characterized in that: One end of the first section is located in the first sub-chamber, and the other end of the first section is located in the second sub-chamber, a first gas flow channel is formed between the injection tube and the inner wall of the first sub-chamber, a second gas flow channel is formed between the injection tube and the inner wall of the second sub-chamber, and the first gas flow channel is connected to the second gas flow channel.

6. The liquid injection device according to claim 3, characterized in that: The first portion has a first wall away from the second portion, and the first mounting hole and the second mounting hole are both arranged on the first wall.

7. The liquid injection device according to claim 3, characterized in that: The second part has a second wall away from the first part, the first opening is provided on the second wall, and the second wall is used to be connected to the electrical box.

8. The liquid injection device according to claim 7, characterized in that: The second wall is also provided with a connecting hole, and the liquid injection device also includes a connecting piece, and the connecting piece is passed through the connecting hole to be connected with the electrical box.

9. The liquid injection device according to claim 3, characterized in that: The first part has a first end surface facing the second part, the first end surface is provided with a positioning groove, one end of the second part extends into the positioning groove, and the second part is detachably connected to the first part.

10. The liquid injection device according to claim 9, characterized in that: The liquid injection device also includes a limiting member, the positioning groove has a first limiting surface facing the second part, the second part has a second limiting surface facing the first part, the limiting member is arranged between the first limiting surface and the second limiting surface, and the limiting member is in contact with the filter element.

11. The liquid injection device according to any one of claims 9 to 10, characterized in that: The liquid injection device further comprises a sealing member, and the sealing member is arranged at a connection between the first part and the second part.

12. The liquid injection device according to claim 1, characterized in that: One end of the first section away from the second section protrudes from the first opening.

13. The liquid injection device according to claim 1, characterized in that: The first section is located in the first accommodating cavity, and the injection device further comprises a connecting tube, one end of which is connected to an end of the first section away from the second section, and the other end of which extends out from the first opening.

14. A liquid injection device, characterized in that: include: comprising a liquid injection device as claimed in any one of claims 1 to 13; The containing device is used to contain the heat exchange medium, and the containing device is connected with the second section.

15. An electric box production line, characterized in that: Comprising the liquid injection device as described in claim 14.

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