Battery pack, battery device and battery energy storage system

Abstract

The utility model discloses a battery pack, a battery device and a battery energy storage system, the battery pack is connected with a plurality of electric connectors, and each electric connector comprises a terminal body; the interior of the terminal body is hollow to form a fluid channel, and the fluid channel is provided with a first opening and a second opening on the outer wall of the terminal body; wherein the fluid channel is used for allowing a cooling medium to flow, and the cooling medium can enter the terminal body through the first opening or the second opening. The battery pack provided by the utility model is suitable for energy storage scenes, new energy automobiles and other scenes, and adopts an innovative electric connector cooling structure. Compared with a terminal with a cooling structure in the prior art, the terminal body of the electric connector is internally provided with the fluid channel for circulation of the cooling medium without depending on a gap formed between the insulating shell and the surface of the terminal. According to the terminal structure, the cooling medium can directly flow through the internal flow channel of the terminal body, and due to the fact that the cooling medium directly flows in the terminal, the requirements for the internal structure of the shell and the installation structure between the shell and the terminal are lower, and the design and manufacturing processes are simplified.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery energy storage system technical field, concretely relates to a kind of battery pack, battery device, battery energy storage system. BACKGROUND

[0002] Battery Energy Storage System (BESS) is a kind of technology that stores electrical energy in batteries for subsequent use. Battery Energy Storage System is divided into new energy vehicle power battery, household energy storage, commercial energy storage, industrial energy storage and grid-level energy storage according to different application scenarios, and each product is different according to specific needs and use environment. Common ones are new energy vehicle power battery, commercial / industrial energy storage cabinet, energy storage container, etc.

[0003] In the battery energy storage system, the electric connector (Electric Connector) as the interface component for electrical connection plays a crucial role in the electrical connection of the system. With the development of the industry, the battery energy storage system has specific use requirements for the electric connector in high-power and high-current scenarios. In high-power and high-current scenarios, there are high requirements for the current-carrying capacity of the electric connector of the battery energy storage system itself. However, improving the current-carrying capacity requires corresponding solutions to the corresponding heat dissipation problem, which puts forward requirements for the cooling scheme of the electric connector.

[0004] However, research has found that the electric connector used in conventional battery energy storage systems does not have a cooling structure and cooling scheme, and using large-section conductive lines is high in cost. Therefore, how to solve the heat dissipation of the electric connector of the battery energy storage system and improve the current-carrying capacity of the electric connector has become a problem that needs to be solved. UTILITY MODEL CONTENT

[0005] In order to overcome the above technical defects, the utility model provides a kind of battery pack, battery device, battery energy storage system.

[0006] In order to solve the above problems, the utility model is realized according to the following technical scheme:

[0007] In the first aspect, the utility model provides a kind of battery pack, and the battery pack is connected with a plurality of electric connectors, and the electric connector includes a terminal body;

[0008] The inside of the terminal body is hollow to form a fluid passage, and the fluid passage has a first opening and a second opening on the outer wall of the terminal body;

[0009] Among them, the fluid passage is used for cooling medium to flow, and the cooling medium can enter the inside of the terminal body through the first opening or the second opening.

[0010] In combination with the first aspect, the utility model provides a first aspect's first specific implementation mode, specifically, the inner wall of whole fluid channel is provided with insulating layer, the insulating layer is used for isolating the terminal body directly with cooling medium contact.

[0011] In combination with the first aspect, the utility model provides a first aspect's second specific implementation mode, specifically, the terminal body is the first terminal and the second terminal mutual connection constitutes.

[0012] The first terminal has the first channel in the inside, and the first opening is arranged on the outer wall of the first terminal.

[0013] The second terminal has the second channel in the inside, and the second opening is arranged on the outer wall of the second terminal.

[0014] Wherein, when the first terminal and the second terminal are assembled into the terminal body, the first channel and the second channel are communicated and jointly constitute the fluid channel.

[0015] In combination with the first aspect, the utility model provides a first aspect's third specific implementation mode, specifically, the cavity of the first terminal is provided with the first insulating injection body, and the first insulating injection body is hollow in the inside and forms the first channel.

[0016] The cavity of the second terminal is provided with the second insulating injection body, and the second insulating injection body is hollow in the inside and forms the second channel.

[0017] Wherein, when the first terminal and the second terminal are assembled into the terminal body, the first insulating injection body and the second insulating injection body are in sealed contact.

[0018] The second aspect, the utility model provides a kind of battery device, comprising:

[0019] Multiple battery packs;

[0020] Multiple electrical connector assemblies, the electrical connector assembly includes 2 electrical connectors and liquid cooling cable, 2 electrical connectors are connected at the both ends of liquid cooling cable respectively, and the electrical connector assembly can be electrically connected any two battery packs.

[0021] Wherein, the electrical connector includes terminal body, the inside of the terminal body is hollow and forms fluid channel, and the fluid channel has first opening and second opening on the outer wall of the terminal body;The fluid channel is used for cooling medium to flow, and cooling medium can enter the inside of terminal body through first opening or second opening.

[0022] In combination with the second aspect, the utility model also provides a second aspect's first kind of specific implementation, specifically, the battery package is provided with the connecting pipe, the connecting pipe is used for connecting the different electric connector components installed on the same battery package;

[0023] The connecting pipe is connected with the terminal body of the electric connector, and the connecting pipe is in communication with the fluid channel of the terminal body.

[0024] In combination with the second aspect, the utility model also provides a second aspect's second kind of specific implementation, specifically, the liquid cooling cable is built in cooling pipe, cooling pipe is in communication with the fluid channel of the terminal body of the two electric connectors respectively;

[0025] The fluid channel of the terminal body of the two electric connectors of each electric connector component and the cooling pipe of the liquid cooling cable jointly constitute a cooling channel.

[0026] In combination with the second aspect, the utility model also provides a second aspect's third kind of specific implementation, specifically, the inner wall of whole fluid channel is provided with insulating layer, the insulating layer is used for isolating the terminal body directly with cooling medium contact;

[0027] The connecting pipe and the cooling pipe of the liquid cooling cable are all insulating pipes.

[0028] Thirdly, the utility model also provides a kind of battery energy storage system, including the battery package of first aspect;Or, including the battery device of second aspect.

[0029] Fourthly, the utility model also provides a kind of battery energy storage system, including:

[0030] Multiple battery packages, the connecting pipe is built in the battery package;

[0031] Multiple electric connector components, the electric connector component includes two electric connectors and liquid cooling cable, two electric connectors are connected at two end portions of liquid cooling cable respectively, and the electric connector component can be electrically connected any two battery packages;

[0032] The electric connector includes terminal body, the inside of the terminal body is hollow and forms fluid channel, and the fluid channel has first opening and second opening on the outer wall of the terminal body;The fluid channel is used for the flow of cooling medium, and cooling medium can enter the inside of terminal body through first opening or second opening;

[0033] The liquid cooling cable is internally provided with cooling pipes which are communicated with the fluid channels of the terminal bodies of the two electric connectors respectively; the fluid channels of the terminal bodies of the two electric connectors of each electric connector assembly and the cooling pipes of the liquid cooling cable jointly form a cooling channel;

[0034] The connecting pipes are used for connecting different electric connector assemblies installed on the same battery pack; the connecting pipes are connected with the terminal bodies of the electric connectors and communicated with the fluid channels of the terminal bodies; the connecting pipes of the plurality of battery packs sequentially connect the cooling channels of the plurality of electric connectors, and the plurality of connecting pipes and the plurality of cooling channels jointly form a cooling pipeline.

[0035] Compared with the prior art, the utility model has the beneficial effects that:

[0036] The utility model provides a battery pack, the battery pack is connected with a plurality of electric connectors, the electric connector includes terminal body, the inside of terminal body is hollow and forms fluid channel, the fluid channel has first opening and second opening on the outer wall of terminal body, wherein, the fluid channel is used for flowing cooling medium, and the cooling medium can enter the inside of terminal body through first opening or second opening.

[0037] The battery pack provided by the utility model is suitable for energy storage scenes, new energy automobile scenes and the like, and an innovative electric connector cooling structure is adopted. Compared with the prior art terminal with a cooling structure, the terminal body of the electric connector of the present technology has a fluid channel for the flow of cooling medium in the inside of the terminal body, and does not rely on the gap formed between the insulating shell and the terminal surface. The cooling medium can directly flow through the internal flow channel of the terminal body. The terminal structure has lower requirements for the internal structure of the shell and the mounting structure between the shell and the terminal, and the design and manufacturing process is simplified.

[0038] Since the cooling medium directly flows in the conductor, the requirement for the external space can be reduced, thereby reducing the volume of the entire electric connector and the space occupation. The cooling structure of the present technology solves the heat dissipation problem of the electric connector of the battery pack and meets the needs of large-current and large-power energy storage scenes.

[0039] The battery device and the battery energy storage system of the present technology both adopt the above-mentioned battery pack, and thus have the same technical effects. BRIEF DESCRIPTION OF DRAWINGS

[0040] The specific embodiments of the utility model will be further described in detail below with reference to the drawings, in which:

[0041] Figure 1 is a structural schematic view of a battery pack in a battery energy storage system of the utility model;

[0042] Figure 2 is the assembling view of the electric connector, liquid cooling cable and connecting pipe of the battery pack in the battery energy storage system of the utility model;

[0043] Figure 3 is the three-dimensional view and assembling view of the electric connector of the first terminal body 100 of the utility model;

[0044] Figure 4 is the A-A cross section view of the electric connector of the first terminal body 100 of the utility model;

[0045] Figure 5 is the B-B cross section view of the electric connector of the first terminal body 100 of the utility model;

[0046] Figure 6 is the three-dimensional view and assembling view of the electric connector of the second terminal body 100 of the utility model;

[0047] Figure 7 is the C-C cross section view of the electric connector of the second terminal body 100 of the utility model;

[0048] Figure 8 is the D-D cross section view of the electric connector of the second terminal body 100 of the utility model;

[0049] Figure 9 is the three-dimensional view and assembling view of the second terminal body 100 of the utility model;

[0050] Figure 10 is the structure view of the cooling pipeline of the utility model;

[0051] In the figure:

[0052] 100-terminal body (conductive terminal);

[0053] 110-first terminal, 111-first insulating injection body, 1111-connection part, 112-first opening, 113-push piece, 114-plug-in part;

[0054] 120-second terminal, 121-second insulating injection body, 1211-hollow insertion column part, 1212-sealing ring, 122-second opening, 123-insertion slot structure;

[0055] 130-fluid passage, 131-first passage, 132-second passage;

[0056] 140-crown spring;

[0057] 150-first end cap piece, 151-first plugging piece, 152-first elastic piece;

[0058] 160 - second end cap, 161 - second obturator, 162 - second elastic member;

[0059] 200 - liquid-cooled cable, 210 - conductor, 220 - cooling tube;

[0060] 300 - battery pack, 310 - connecting tube. DETAILED DESCRIPTION

[0061] The preferred embodiments of the present application will be described herein below with reference to the accompanying drawings, in which the preferred embodiments of the present application merely illustrate and explain the present application, and are not intended to limit the present application.

[0062] The technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0063] It should be noted that when a component is referred to as being "fixed" to another component, it can be directly on the other component or there can be intervening components. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or there can be intervening components.

[0064] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0065] The applicant found through research that a battery energy storage system (BESS) is a technology that stores electrical energy in a battery for subsequent use. Battery energy storage systems are divided into household energy storage, commercial energy storage, industrial energy storage, and grid-level energy storage according to different application scenarios, and each product is different according to specific needs and use environment. Common examples include power batteries for new energy vehicles, commercial / industrial energy storage cabinets, energy storage containers, and the like.

[0066] In a battery energy storage system, an electric connector serves as an interface component for electrical connection and plays a crucial role in the electrical connection of the system. With the development of the industry, the battery energy storage system has specific usage requirements for electric connectors in high-power and high-current scenarios. In high-power and high-current scenarios, there are high requirements for the current-carrying capacity of the electric connector of the battery energy storage system itself. However, improving the current-carrying capacity requires corresponding solutions to the corresponding heat dissipation problem, which puts forward requirements for the cooling scheme of the electric connector. Investigation shows that the electric connectors used in conventional battery energy storage systems do not have cooling structures and cooling schemes. If large cross-section conductive lines are used, the cost is correspondingly increased.

[0067] Therefore, how to solve the heat dissipation of the electric connector of the battery energy storage system and improve the current-carrying capacity of the electric connector has become a problem to be solved.

[0068] At present, electric connectors with cooling structures are mainly used in charging scenarios for charging power batteries of new energy vehicles, such as Chinese invention patents with announcement numbers CN111653893A, CN112467487A, CN116979298A, and CN110696651A. Such electric connectors adopt a combination of an insulating shell and a terminal to form a gap for circulating cooling liquid between the insulating shell and the terminal. This cooling structure design requires that there must be a gap for circulating cooling liquid between the insulating shell and the terminal, which increases the complexity of the design and requires reasonable control of the gap size to ensure effective heat exchange and cooling liquid flow. On the other hand, a larger shell is often needed to form the gap to accommodate the cooling liquid, increasing the volume of the electric connector.

[0069] On the other hand, the existing electric connectors for new energy vehicle charging scenarios adopt a combination of an insulating shell and a terminal to form a gap for circulating cooling liquid between the insulating shell and the terminal. This cooling structure design requires that there must be a gap for circulating cooling liquid between the insulating shell and the terminal, which increases the complexity of the design and requires reasonable control of the gap size to ensure effective heat exchange and cooling liquid flow. On the other hand, a larger shell is often needed to form the gap to accommodate the cooling liquid, increasing the volume of the electric connector.

[0070] To this end, the utility model provides a kind of battery pack, which adopts the electric connector of brand-new cooling structure, it has adopted innovative terminal structure, compared with existing terminal, the utility model's terminal body has the fluid passage that can supply cooling medium to flow through inside, and does not rely on the gap formed by insulating shell and terminal surface.Cooling medium can directly flow from the internal flow channel of terminal body, and the terminal structure directly flows in the inside of terminal because of cooling medium, the internal structure of shell, the installation structure between shell and terminal is lower in requirement, simplifies design and manufacturing process.The cooling structure of the present technology solves the heat dissipation problem of the electric connector of battery pack, and meets the needs of large-current, large-power energy storage scenarios.

[0071] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The following examples and features in the examples can be combined with each other without conflict.

[0072] Example One

[0073] Firstly refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 And Figure 9 , the structure schematic diagram of battery pack and its electric connector according to the embodiment of the present application is described.

[0074] As Figure 1 shown, the battery pack (Battery Pack) of the utility model is combined according to certain electrical and mechanical structure by multiple battery units (battery monomer), and forms a whole module that can be used for power supply.In the prior art, a battery pack is usually composed of battery module, battery management system (BMS), shell and other main parts.

[0075] In the field, battery pack is widely used in electric vehicles, battery energy storage systems, consumer electronics and industrial applications and other fields.In the present technology, the main purpose is a new type of battery pack structure, and the core lies in that the electric connector of battery pack adopts innovative cooling structure design.

[0076] In the present technology, the electrical connector is a component for electrical connection between battery packs, between a battery pack and an electrical component. The electrical connector is installed on the battery pack by plugging its terminal body, which is electrically conductive to achieve electrical connection with the battery pack. Specifically, the battery pack is connected with several electrical connectors, which include a terminal body; the inside of the terminal body is hollow to form a fluid channel, which has a first opening and a second opening on the outer wall of the terminal body; wherein the fluid channel is used for the flow of cooling medium, and the cooling medium can enter the inside of the terminal body through the first opening or the second opening.

[0077] As shown in Figure 3 The terminal body 100 for the electrical connector is shown, the inside of which is hollow to form a fluid channel 130, which has a first opening 112 and a second opening 122 on the outer wall of the terminal body 100. Wherein the fluid channel 130 is used for the flow of cooling medium, and the cooling medium can enter the inside of the terminal body 100 through the first opening 112 or the second opening 122.

[0078] In the present utility model, the cooling medium can directly flow through the internal flow channel of the terminal body 100, and then cool the terminal body 100. The terminal structure requires lower requirements for the internal structure of the shell and the mounting structure between the shell and the terminal, simplifying the design and manufacturing process. And because the cooling medium flows directly inside the conductor 210, the need for external space can be reduced, thereby reducing the volume of the entire electrical connector and reducing space occupation.

[0079] It should be noted that the fluid channel 130 is closed, and only communicates with the outside through the same first opening 112 and second opening 122. The cooling medium can enter the fluid channel 130 through the first opening 112 and the second opening 122. The purpose is to avoid leakage of the cooling medium to cause electrical problems or accidents, etc.

[0080] In the present utility model, the cooling medium is specifically a fluid, which can be a cooling liquid or a cooling gas. The cooling medium is a substance used to absorb and transfer heat, which plays a crucial role in various industrial processes and equipment to ensure the safe operation of the terminal body.

[0081] It can be understood that when the cooling medium is a fluid, it can be a liquid cooling liquid or a gas cooling gas. When it is a gas cooling gas, it can be nitrogen, argon, etc., which can be used as a cooling medium under certain conditions, especially in environments where oxidation or chemical reaction needs to be prevented. The cooling liquid is a common technical means in the art, which will not be described here.

[0082] In another preferred implementation, the inner wall of the entire fluid passage 130 of the terminal body 100 is provided with an insulation layer for isolating the terminal body 100 from direct contact with the cooling medium.

[0083] In a specific implementation, the insulation layer can be formed by an injection molding process and a spraying process.

[0084] Regarding the injection molding process:

[0085] The injection molding process is a method of injecting plastic material into a mold to form the desired insulation injection body through the shape of the mold. In the manufacturing process of the terminal body 100, the insulation material (usually plastic) is injected into the mold to form the inner wall insulation layer of the fluid passage 130. This method can achieve precise size control and complex shape design, while providing good insulation performance and mechanical strength. The injection molded insulation layer can closely fit the inner wall of the fluid passage 130 of the terminal body 100, ensuring electrical insulation and physical protection.

[0086] Regarding the spraying process:

[0087] The spraying process is a surface treatment technology that sprays paint (such as plastic powder) onto the surface of an object through a spray gun to form a uniform, attractive, and wear-resistant protective layer. In a specific implementation, a spraying process can be used, which is a type of spraying process. In the application of the insulation layer, the spraying process can form an insulation coating on the inner wall of the fluid passage 130 of the terminal body 100. Spraying can also improve the adhesion between the insulation layer and the substrate, making the insulation layer more secure. The advantage of the spraying process is that the coating has excellent appearance quality, strong adhesion and mechanical strength, and is easy to apply.

[0088] In the present utility model, the insulation layer can prevent the cooling medium from directly contacting the terminal body 100, which can avoid corrosion caused by electrochemical action. The implementation of the insulation layer can meet the application of various cooling media, including cooling media with certain electrical conductivity.

[0089] It should be noted that the conventional cooling terminal, which is generally applied in new energy vehicle charging technology, generally uses silicon oil as a cooling medium, and the silicon oil has a certain degree of insulating property. However, in other application scenarios, such as energy storage scenarios, electrical equipment often has a liquid cooling system, which is generally water cooling, rather than a strong conductive material such as silicon oil. If a separate liquid cooling system is provided for the cooling terminal, the application cost is greatly increased. Therefore, in order to match the cooling system of the electrical equipment in other scenarios and reduce the cost, the application sets an insulating layer in the fluid channel 130 of the terminal body 100. The insulating layer can meet the heat dissipation application of various cooling media in the conductive terminal, reduce the requirement for the cooling medium, and also widen the application scenario to meet the use of battery packs in new energy vehicles, energy storage and other occasions.

[0090] It can be understood that the insulating layer improves the reliability and safety of the electrical connector, as it prevents short circuits or electrical breakdowns that can be caused by the cooling medium. The presence of the insulating layer allows the use of different types of cooling media.

[0091] In a specific implementation, the insulating layer is an injection molded body formed in the fluid channel 130. The insulating layer can be made of insulating plastic and is formed by combining the terminal body 100 through an injection molding process. Through the above injection molding process, the insulating layer and the terminal body 100 can be effectively combined to form an integrated electrical connector terminal assembly, and the sealing performance is better guaranteed to avoid cooling medium leakage or direct contact with the terminal body 100 to cause short circuit and other problems.

[0092] In a preferred implementation, the first opening 112 and the second opening 122 are each provided with an insulating layer or an insulating connecting member to connect an external cooling system. This ensures sufficient insulation design.

[0093] It should be noted that when the terminal body 100 does not have an insulating layer or the like, the terminal body 100 can use a cooling medium such as silicon oil that has a certain insulating property. When the terminal body 100 is provided with an insulating layer, a variety of cooling media can be used. The thickness of the insulating layer should not be too thick to avoid affecting the cooling effect.

[0094] Further, the utility model does not limit the entering mode of the cooling medium. Specifically, the first opening 112 can be used as a liquid inlet, and the second opening 122 can be used as a liquid outlet. In another implementation, the second opening 122 can be used as a liquid inlet, and the first opening 112 can be used as a liquid outlet. This is determined according to the flow direction of the cooling medium of the cooling system in the application scenario and the connection relationship of the electrical connector in the cooling system.

[0095] As Figure 9As shown, the terminal body 100 includes a first terminal 110 and a second terminal 120, which are assembled into the terminal body 100.

[0096] Specifically, the terminal body 100 is formed by interconnecting a first terminal 110 and a second terminal 120. The first terminal 110 has a first channel 131 inside, and a first opening 112 is located on the outer wall of the first terminal 110. The second terminal 120 has a second channel 132 inside, and a second opening 122 is located on the outer wall of the second terminal 120. When the first terminal 110 and the second terminal 120 are assembled into the terminal body 100, the first channel 131 and the second channel 132 communicate with each other and together form a fluid channel 130.

[0097] The modular structure of the terminal body 100 of this invention allows for easy processing into the required shape. In particular, when the first channel 131 and the second channel 132 are more complex, it facilitates better production and assembly, helps to simplify the production process, and reduces production difficulty.

[0098] In one specific implementation, the connection method between the first terminal 110 and the second terminal 120 can be threaded connection, plug-in assembly, welding fixation, etc. Each connection method has its specific application scenarios and advantages, and can be selected according to the application scenario. When using threaded connection or plug-in assembly, the connection point needs to be sealed, which is easy for those skilled in the art to implement.

[0099] It is understandable that when the first terminal 110 and the second terminal 120 are assembled into the terminal body 100, the first channel 131 of the first terminal 110 will be connected to the second channel 132 of the second terminal 120, thereby forming a complete fluid channel 130. For example, the channel opening of the first channel 131 is connected to the channel opening of the second channel 132 to form the fluid channel 130.

[0100] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, a first insulating injection molded body 111 is disposed within the cavity of the first terminal 110, and the interior of the first insulating injection molded body 111 is hollow, forming a first channel 131. A second insulating injection molded body 121 is disposed within the cavity of the second terminal 120, and the interior of the second insulating injection molded body 121 is hollow, forming a second channel 132. When the first terminal 110 and the second terminal 120 are assembled into the terminal body 100, the first insulating injection molded body 111 and the second insulating injection molded body 121 are in sealed contact.

[0101] It should be noted that the sealed contact between the insulating injection bodies ensures the airtightness of the fluid channel 130, preventing the cooling medium from leaking. On the other hand, the insulating injection bodies can increase the structural strength of the terminal body 100, especially when subjected to mechanical stress such as vibration, impact or pressure change.

[0102] The insulating injection bodies can be formed by an injection molding process in combination with the first / second terminals 120, on the one hand to meet the shape of the fluid channel 130 of various configurations, and on the other hand, the design of the insulating injection bodies allows the shape and size of the fluid channel 130 to be adjusted without changing the shape of the terminal body 100 to adapt to different cooling requirements.

[0103] It can be understood that the first insulating injection body 111 and the second insulating injection body 121 together constitute the insulating layer. The insulating injection bodies provide good electrical insulation performance to ensure the safe operation of the electrical connector.

[0104] In a preferred embodiment, the first insulating injection body 111 has a connecting portion 1111 provided with a cylindrical through hole forming the first opening 112. The connecting portion 1111 is the part of the first insulating injection body 111 located outside the first terminal 110, and the cylindrical through hole of the connecting portion 1111 directly extends into the first channel 131, which can ensure the integrity of the insulation.

[0105] In this specific embodiment, the first terminal 110 is used to connect the liquid-cooled cable 200, and the cylindrical through hole of the connecting portion 1111 of the first insulating injection body 111 is used for the cooling pipe 220 of the liquid-cooled cable 200 to pass through, and the cooling pipe 220 is sealingly connected with the inner wall of the cylindrical through hole.

[0106] In the first preferred embodiment, the second insulating injection body 121 has a hollow insertion column portion 1211, and when the first terminal 110 and the second terminal 120 are assembled into the terminal body 100, the hollow insertion column portion 1211 of the second insulating injection body 121 is inserted into the first channel 131 of the first terminal 110, and the outer wall of the hollow insertion column portion 1211 is in sealing contact with the inner wall of the first channel 131.

[0107] In the present utility model, the design that the hollow insertion column portion 1211 is inserted into the first channel 131 ensures the accurate butt joint of the fluid channel 130, which is conducive to the smooth flow of the cooling medium between the two terminals. The sealing contact between the outer wall of the hollow insertion column portion 1211 and the inner wall of the first channel 131 is a surface contact, which provides better sealing effect, prevents the cooling medium from leaking, and ensures the reliability and safety of the terminal body 100.

[0108] The present utility model does not limit the shape of the hollow insertion column portion 1211, which can be cylindrical or other shapes.

[0109] In the second preferred embodiment, the second insulating injection body 121 has a hollow insertion column part 1211 sleeved with a sealing ring 1212; when the first terminal 110 and the second terminal 120 are assembled into the terminal body 100, the hollow insertion column part 1211 of the second insulating injection body 121 is inserted into the first channel 131 of the first terminal 110, and the sealing ring 1212 of the hollow insertion column part 1211 is in sealing contact with the inner wall of the first channel 131.

[0110] The second preferred embodiment aims to enhance the sealing performance. The sealing ring 1212 provides an additional sealing layer, ensuring that the sealing contact between the hollow insertion column part 1211 and the inner wall of the first channel 131 is more reliable, effectively preventing the leakage of the cooling medium. In the preferred embodiment, the outer wall of the hollow insertion column part 1211 is provided with an annular groove for positioning and installing the sealing ring 1212. Multiple sealing rings 1212 can be arranged along the length direction of the hollow insertion column part 1211 in sequence, improving the sealing effect.

[0111] As shown in the drawings, Figure 4 In the preferred embodiment, the first terminal 110 and the second terminal 120 are respectively provided with insulating injection bodies, which isolate the electrical contact between the first terminal 110 and the second terminal 120. Therefore, the utility model provides a terminal structure compatible with insulating injection bodies to realize the electrical contact between the first terminal 110 and the second terminal 120.

[0112] Specifically, the first terminal 110 has an insertion part 114. The second terminal 120 has a slot structure 123, and the slot structure 123 of the second terminal 120 is fixedly connected with a crown spring 140, which is in close contact with the inner wall of the slot structure 123.

[0113] The insertion part 114 of the first terminal 110 is adapted to the slot structure 123 of the second terminal 120 to assemble into the terminal body 100; the crown spring 140 is used to tightly contact the outer wall of the insertion part 114 of the first terminal 110 to form the electrical contact between the first terminal 110 and the second terminal 120.

[0114] It can be understood that when the first terminal 110 and the second terminal 120 are installed, the insertion part 114 is inserted into the slot structure 123 of the second terminal 120, at this time, the second insulating injection body 121 is adapted to the first insulating injection body 111 to form the fluid channel 130; and the outer wall of the insertion part 114 contacts the crown spring 140 in the insertion structure, thereby realizing the electrical contact.

[0115] In the art, the crown spring 140 is generally formed in a cylindrical shape, and a rectangular spring leaf is arranged between the connecting bands at both ends thereof. Moreover, a protruding contact point is formed at the middle of the spring leaf, towards the inner axis of the cylinder, and the crown spring 140 is electrically contacted with the plug-in part 114 of the first terminal 110 through the contact point, to play a role of conducting the circuit. The elasticity of the crown spring 140 can adapt to certain manufacturing tolerances and assembly errors, and the flexibility of assembly is improved.

[0116] On the other hand, the use of the crown spring 140 not only provides electrical contact, but also can improve the mechanical strength of the plug-in connection of the first terminal 110 and the second terminal 120 to a certain extent, and bear certain mechanical stress.

[0117] In a preferred embodiment, the utility model also provides a preferred embodiment of the terminal body 100, and a valve assembly which can be opened and closed is arranged in the fluid channel 130, so that in some cases, if the first terminal 110 and the second terminal 120 are connected, the problem of leakage of the cooling medium can be avoided. For this purpose, the utility model provides three specific embodiments:

[0118] (1) The first valve assembly of the fluid channel 130 is specifically implemented as follows:

[0119] As shown in Figs. 4 and Figure 5 The first terminal 110 is provided with a push piece 113 in the first channel 131. The second terminal 120 comprises an end cap, a blocking piece arranged in the second channel 132, and an elastic piece, the end cap is arranged at the channel opening of the second channel 132, and the blocking piece is arranged between the elastic piece and the end cap.

[0120] The elastic piece is used to make the blocking piece tightly contact the end cap, so as to block the through hole of the end cap and close the end of the second channel 132. The outer diameter of the push piece 113 is smaller than the inner diameter of the through hole of the end cap, when the first terminal 110 and the second terminal 120 are assembled into the terminal body 100, the push piece 113 of the first terminal 110 passes through the through hole of the end cap and abuts against the blocking piece away from the end cap, so that the first channel 131 and the second channel 132 are communicated.

[0121] In a specific embodiment, the push piece 113 is a long columnar structure, which is injection molded together with the first insulating injection body 111.

[0122] In a specific embodiment, the end cap can be sleeved and fixed at the end of the hollow plug-in column part 1211, the inner diameter of the through hole of the end cap is smaller than the inner diameter of the hollow plug-in column part 1211, and the outer wall of the end cap towards the blocking piece is provided with a counterbore structure, which is used to face contact the outer wall of the blocking piece, to achieve better blocking effect.

[0123] In one embodiment, the elastic member is a spring compressed in the second channel 132. The blocking member is a plastic plug with a tapered end to fit into the counterbore of the blocking member.

[0124] It can be understood that normally, the spring pushes the blocking member to tightly contact the through hole of the end cap member, thereby closing the through hole. When the first terminal 110 and the second terminal 120 are assembled, the pushing member 113 pushes the blocking member away from the end cap member by physical contact, thereby forming a gap between the through hole and the blocking member / pushing member 113 for the cooling medium to flow through.

[0125] In one embodiment, the outer diameter of the pushing member 113 is much smaller than the inner diameter of the through hole. When the first terminal 110 and the second terminal 120 are assembled, the pushing member 113 is inserted into the through hole and pushes the blocking member away from the end cap member, thereby forming a gap between the through hole and the pushing member 113 for the cooling medium to flow through.

[0126] (2) Embodiment of the second valve assembly of the fluid channel 130:

[0127] The first terminal 110 includes an end cap member, a blocking member arranged in the first channel 131, and an elastic member. The end cap member is arranged at the channel opening of the first channel 131, and the blocking member is arranged between the elastic member and the end cap member. The second terminal 120 is provided with a pushing member 113 in the second channel 132, and the outer diameter of the pushing member 113 is smaller than the inner diameter of the through hole of the end cap member.

[0128] The elastic member is used to make the blocking member tightly contact the end cap member to block the through hole of the end cap member and close the end of the first channel 131. When the first terminal 110 and the second terminal 120 are assembled into the terminal body 100, the pushing member 113 of the second terminal 120 penetrates the through hole of the end cap member and pushes the blocking member away from the end cap member, so as to make the first channel 131 and the second channel 132 communicate.

[0129] It can be understood that the embodiment of the second valve assembly is only different from the embodiment of the first valve assembly in that the positions of the internal valve assemblies of the first terminal 110 and the second terminal 120 are reversed, and the principles and functions are the same.

[0130] (3) Embodiment of the third valve assembly of the fluid channel 130:

[0131] As Figure 7 and Figure 8As shown, the first terminal 110 includes a second end cap 160, a first blocking member 151 arranged in the first channel 131, and a first elastic member 152, the second end cap 160 is arranged at the channel opening of the first channel 131, and the first blocking member 151 is arranged between the first elastic member 152 and the second end cap 160. The first elastic member 152 is used to make the first blocking member 151 tightly contact the second end cap 160, so as to block the through hole of the first end cap 150 and close the end of the first channel 131.

[0132] The second terminal 120 includes a second end cap 160, a second blocking member 161 arranged in the second channel 132, and a second elastic member 162, the second end cap 160 is arranged at the channel opening of the second channel 132, and the second blocking member 161 is arranged between the second elastic member 162 and the second end cap 160. The second elastic member 162 is used to make the second blocking member 161 tightly contact the second end cap, so as to block the through hole of the second end cap 160 and close the end of the second channel 132.

[0133] When the first terminal 110 and the second terminal 120 are assembled into the terminal body 100, the first blocking member 151 of the first terminal 110 and the second blocking member 161 of the second terminal 120 contact and abut each other, and the first blocking member 151 is away from the first end cap 150 to open the through hole of the first end cap 150, and the second blocking member 161 is away from the second end cap to open the through hole of the second end cap, and the first channel 131 and the second channel 132 are communicated.

[0134] It can be understood that the third valve assembly embodiment is only different from the first valve assembly embodiment in that the first terminal 110 cancels the pushing member 113, and the first terminal 110 uses the interaction force between the first blocking member 151 and the second blocking member 161 of the second terminal 120 to make them away from the respective end caps, thereby realizing the opening of the first channel 131 and the second channel 132.

[0135] When the first terminal 110 and the second terminal 120 are assembled into the terminal body 100, the first blocking member 151 and the second blocking member 161 contact and abut each other, and the contact force makes the two blocking members away from the respective end caps, opens the through hole of the respective end cap, and realizes the communication of the two channels.

[0136] The application provides three application modes of valve assemblies, which can prevent the leakage of cooling medium to a certain extent, avoid possible electrical short circuit or equipment damage, and improve the safety of the whole system in the case of connection failure of the first terminal 110 and the second terminal 120. The third embodiment can provide double protection.

[0137] As Figure 4 and Figure 7 shown, in a specific application scenario, the first terminal 110 is used for connecting the liquid cooling cable 200, and the first insulating injection body 111 has a connecting part 1111 provided with a columnar through hole forming the first opening 112.

[0138] The columnar through hole of the first terminal 110 is used for the cooling pipe 220 of the liquid cooling cable 200 to pass through, and the cooling pipe 220 is in sealing connection with the inner wall of the columnar through hole.

[0139] It can be understood that the sealing connection between the cooling pipe 220 and the inner wall of the columnar through hole ensures that the cooling medium cannot leak, and meets the installation needs of various types of liquid cooling cables 200.

[0140] Example 1

[0141] As Figure 3 shown, the utility model provides an example 1 of terminal body 100.

[0142] As Figure 3 shown, the first terminal 110 includes a copper bar and a tubular conductive part, the tubular conductive part is fixedly connected to the surface of the copper bar, and the first channel 131 and the first opening 112 are both arranged in the tubular conductive part. The second terminal 120 has a flat part and a tubular part arranged at the head and tail, the second channel 132 passes through the flat part and the tubular part, and the flat part is provided with a second opening 122.

[0143] The second tubular conductive part of the first terminal 110 is adapted to be inserted into the tubular part of the second terminal 120 to assemble the terminal body 100.

[0144] In the utility model, the copper bar of the first terminal 110 is used for connecting the conductor 210 of the liquid cooling cable 200, can be fastened and connected to the conductor 210 by bolt, also can adopt welding and fix the copper bar with the conductor 210. The tubular conductive part of the first terminal 110 is used as the above-mentioned insertion part 114, is used for installing and inserting, and is used for electrically contacting the second terminal 120. On the other hand, the cavity of the tubular conductive part of the first terminal 110 is used for forming the first channel 131. In another embodiment, the first insulating injection body 111 can be formed by injection molding in the lumen of the tubular conductive part, and the first channel 131 is formed.

[0145] In the utility model, the second terminal 120 has the flat part and the tubular part which are arranged at the head and tail, the second channel 132 is arranged through the flat part and the tubular part, and the flat part is provided with the second opening 122.In one embodiment, the cavity of the tubular part and the cavity of the flat part jointly constitute the second channel 132.In another embodiment, the cavity of the tubular part and the cavity of the flat part jointly constitute the cavity of the second terminal 120, the second insulating injection body 121 is formed by injection in the cavity of the second terminal 120, and the second channel 132 is formed in turn.The tubular part is also used to form the slot structure 123.

[0146] In example 1, the cavity of the tubular conductive part of the first terminal 110 is provided with the first insulating injection body 111, the inside of the first insulating injection body 111 is hollow to form the first channel 131, and the first channel 131 is a cylindrical cavity.The first terminal 110 is used to connect the liquid cooling cable 200, the first insulating injection body 111 has the connecting part 1111, the connecting part 1111 is provided with the columnar through hole, and the columnar through hole forms the first opening 112.The columnar through hole of the first terminal 110 is used to pass through the cooling pipe 220 of the liquid cooling cable 200, and the cooling pipe 220 is sealingly connected with the inner wall of the columnar through hole.

[0147] In example 1, the cavity of the tubular part and the flat part of the second terminal 120 is filled with the second insulating injection body 121 by injection, the inside of the second insulating injection body 121 is hollow to form the second channel 132, and the second channel 132 is also a cylindrical cavity.The second insulating injection body 121 has the hollow plug-in column part 1211, and the cavity of the hollow plug-in column part 1211 is part of the second channel 132.The flat part of the second terminal 120 is provided with the second opening 122 which communicates with the second channel 132.

[0148] The product assembly mode of example 1 is as follows: when the first terminal 110 and the second terminal 120 are assembled, the tubular conductive part of the first terminal 110 is inserted into the tubular part of the second terminal 120, and at the same time, the hollow plug-in column part 1211 of the second insulating injection body 121 of the second terminal 120 is inserted into the first channel 131 of the first terminal 110.The outer wall of the hollow plug-in column part 1211 of the second insulating injection body 121 is sealingly contacted with the inner wall of the first channel 131 of the first terminal 110, and a complete and sealed fluid channel 130 is formed.

[0149] In one embodiment, the hollow plug-in column part 1211 of the second insulating injection body 121 is sleeved with the sealing ring 1212; when the first terminal 110 and the second terminal 120 are assembled into the terminal body 100, the hollow plug-in column part 1211 of the second insulating injection body 121 is inserted into the first channel 131 of the first terminal 110, and the sealing ring 1212 of the hollow plug-in column part 1211 is sealingly contacted with the inner wall of the first channel 131.

[0150] The sealing ring 1212 provides an additional sealing layer to ensure that the hollow insertion post 1211 is in reliable sealing contact with the inner wall of the first channel 131, effectively preventing leakage of the cooling medium. In a preferred embodiment, the outer wall of the hollow insertion post 1211 is provided with an annular groove to position and install the sealing ring 1212. Multiple sealing rings 1212 can be arranged along the length of the hollow insertion post 1211 in sequence at intervals to improve the sealing effect.

[0151] Specifically, the fluid channel 130 of the terminal body 100 adopts the specific embodiment of the first valve assembly described above:

[0152] As shown in Figure 3 , the first terminal 110 is provided with a push piece 113 in the first channel 131. The second terminal 120 includes an end cap, a blocking piece arranged in the second channel 132, and an elastic piece, the end cap is arranged at the channel opening of the second channel 132, and the blocking piece is arranged between the elastic piece and the end cap.

[0153] The elastic piece is used to make the blocking piece tightly contact the end cap to block the through hole of the end cap and close the end of the second channel 132. The outer diameter of the push piece 113 is smaller than the inner diameter of the through hole of the end cap. When the first terminal 110 and the second terminal 120 are assembled into the terminal body 100, the push piece 113 of the first terminal 110 passes through the through hole of the end cap and abuts against the blocking piece away from the end cap, so that the first channel 131 and the second channel 132 are communicated.

[0154] In a specific embodiment, the push piece 113 is a long columnar structure, which is injection molded together with the first insulating injection body 111.

[0155] In a specific embodiment, the end cap can be sleeved and fixed at the end of the hollow insertion post 1211. The inner diameter of the through hole of the end cap is smaller than the inner diameter of the hollow insertion post 1211, and the outer wall of the end cap facing the blocking piece is provided with a counterbore structure for surface contact with the outer wall of the blocking piece to achieve better blocking effect.

[0156] In a specific embodiment, the elastic piece is a spring, which is compressed in the second channel 132. The blocking piece is a plug made of plastic, and the end of the plug is a conical structure to match the counterbore structure of the blocking piece.

[0157] It can be understood that under normal circumstances, the spring pushes the blocking piece to tightly contact the through hole of the end cap, thereby closing the through hole. When the first terminal 110 and the second terminal 120 are assembled, the push piece 113 pushes the blocking piece away from the end cap through physical contact, thereby forming a gap between the through hole and the blocking piece / push piece 113 for the flow of cooling medium.

[0158] In one embodiment, the outer diameter of the push member 113 is much smaller than the inner diameter of the through hole, when the first terminal 110 and the second terminal 120 are assembled, the push member 113 is inserted into the through hole and pushes the blocking member away from the end cap member, so that a gap for the cooling medium to flow through is formed between the through hole and the push member 113.

[0159] In this embodiment, the first terminal 110 and the second terminal 120 are conductive connection members of the electrical connector, which are made of metal materials such as copper and copper alloy, aluminum alloy, etc. The specific material of the terminal body 100 is not limited in the utility model.

[0160] It should be noted that the tubular conductive member of the first terminal 110 is a circular pipe when it is delivered, which is a metal pipe. Preferably, an extrusion formed metal pipe is used, which is formed by heating and melting the material and then extruding it through a mold. This type of metal pipe also does not require cutting processing and does not waste raw materials. A stretch formed metal pipe can also be used. The copper bar and the tubular conductive member can be directly welded and fixed.

[0161] The second terminal 120 is a metal column obtained by machining, such as turning, to form a flat portion and a tubular portion. The flat portion is used as an electrical contact part for plugging connection between the terminal body 100 and an external electrical equipment.

[0162] The above is an embodiment of the terminal body 100 of the utility model. Further, the utility model also provides an electrical connector comprising the above terminal body 100.

[0163] Example 2

[0164] The structure and composition of the terminal body 100 of example 2 are exactly the same as those of example 1, except that the structure of the first terminal 110 is different.

[0165] As shown in Figure 4 and Figure 9 Specifically, the first terminal 110 comprises a first tubular conductive member and a second tubular conductive member, the first tubular conductive member has a punched part, and the second tubular conductive member is fixedly connected to the punched part of the first tubular conductive member, and the first channel 131 and the first opening 112 are both arranged in the second tubular conductive member.

[0166] The second terminal 120 has a flat portion and a tubular portion arranged at the head and tail, the second channel 132 penetrates the flat portion and the tubular portion, and the flat portion is provided with a second opening 122.

[0167] The second tubular conductive member of the first terminal 110 is adapted to plug the tubular portion of the second terminal 120, so as to be assembled into the terminal body 100.

[0168] It can be understood that the first tubular conductive member is a stamping structure formed by stamping a pipe material. One end of the first tubular conductive member is sleeved on the conductor 210 of the liquid-cooled cable 200 and is fixedly connected with the cable conductor 210 by welding or crimping. The other end of the first tubular conductive member is a stamping part which is a flat structure part formed by stamping the end of the pipe material.

[0169] In the utility model, the stamping part is a flat plate structure formed by stamping a local pipe material. The first tubular conductive member is a round pipe when it is delivered, and is a kind of metal pipe material. The stamping part can be manufactured by stamping a local part of the round pipe.

[0170] Embodiment Two

[0171] The embodiment two provides a battery pack connected with at least two electric connectors, and the electric connector comprises:

[0172] The conductive terminal has a fluid channel 130 in the inside, and the fluid channel 130 has a first opening 112 and a second opening 122 on the outer wall of the conductive terminal.

[0173] The fluid channel 130 is used for flowing of the cooling medium, and the cooling medium can enter the inside of the conductive terminal through the first opening 112 or the second opening 122.

[0174] Specifically, the conductive terminal is the terminal body 100 described in embodiment one.

[0175] Compared with the existing electric connector, the conductive terminal used in the electric connector of the utility model has a fluid channel 130 in the inside for flowing of the cooling medium, and does not depend on the gap formed by the insulating shell and the terminal surface. The cooling medium can directly flow through the internal channel of the terminal body 100, and the terminal structure has lower requirements for the internal structure of the insulating shell of the electric connector and the mounting structure between the shell and the terminal, so that the design and manufacturing process are simplified.

[0176] In a preferred implementation, the inner wall of the fluid channel 130 is provided with an insulating layer for isolating the conductive terminal from direct contact with the cooling medium.

[0177] In the utility model, the insulating layer can prevent the cooling medium from directly contacting the conductive terminal, which can avoid corrosion caused by electrochemical action. Although the existence of the insulating layer affects the heat conduction efficiency, the implementation of the insulating layer can meet the application of various cooling media, including cooling media with certain electrical conductivity.

[0178] It should be noted that the conventional cooling terminal, which is generally applied in new energy vehicle charging technology, generally uses silicon oil as the cooling medium, and the silicon oil has a certain degree of insulating property and can be directly contacted with the terminal. However, in the energy storage scene, the energy storage device often has a liquid cooling system, and the liquid cooling system is generally water cooling, not such as silicon oil, and has a certain electrical conductivity. If a separate liquid cooling system is provided for the cooling terminal, the application cost is greatly increased.

[0179] Therefore, in order to match the cooling system of the energy storage device and reduce the cost, the application sets an insulating layer in the fluid channel 130 of the conductive terminal. The insulating layer can meet the heat dissipation application of various cooling media in the conductive terminal, reduce the requirement for the cooling medium, and also broaden the application scene.

[0180] It can be understood that the insulating layer improves the reliability and safety of the electrical connector, because it prevents the short circuit or electrical breakdown problem that may be caused by the cooling medium. The presence of the insulating layer allows the use of different types of cooling media,

[0181] In a specific implementation, the insulating layer is an injection molded body formed in the fluid channel 130. The insulating layer can be made of insulating plastic and is formed by an injection molding process combined with the terminal body 100. Through the above injection molding process, the insulating layer and the terminal body 100 can be effectively combined to form an integrated electrical connector terminal assembly, and the sealing performance is better guaranteed, avoiding the problem of cooling medium leakage or direct contact with the terminal body 100 to cause short circuit.

[0182] Embodiment three

[0183] The third embodiment provides a battery pack connected with at least two electrical connectors, and the electrical connector comprises:

[0184] a terminal assembly, the terminal assembly comprising a first terminal and a second terminal, the first terminal being capable of being assembled with the second terminal to form a conductive terminal; the first terminal having a first channel in the interior thereof, and a first opening being formed in the outer wall of the first terminal and communicating with the first channel; the second terminal having a second channel in the interior thereof, and a second opening being formed in the outer wall of the second terminal and communicating with the second channel;

[0185] an insulating shell for accommodating the conductive terminal;

[0186] When the first terminal and the second terminal are assembled to form the conductive terminal, the first channel and the second channel communicate with each other and jointly form a fluid channel, and the fluid channel is used for flowing of the cooling medium, and the cooling medium can enter the interior of the conductive terminal through the first opening or the second opening.

[0187] Specifically, the terminal assembly is the terminal body 100 described in embodiment one, and the shape, structure, etc. of the terminal body 100 described in embodiment one are completely the same. The electrical connector of the present embodiment has the product function described in embodiment one.

[0188] Compared with the existing electrical connector, the electrical connector of the utility model adopts the conductive terminal, which has a fluid passage for the circulation of the cooling medium inside, and does not rely on the gap formed by the insulating shell and the terminal surface. The cooling medium can directly flow through the internal flow channel of the terminal body, and the terminal structure has lower requirements for the internal structure of the insulating shell of the electrical connector and the mounting structure between the shell and the terminal because the cooling medium directly flows in the terminal, thereby simplifying the design and manufacturing process.

[0189] In the utility model, the insulating shell is a plastic injection molding combined with the terminal assembly. Specifically, the insulating shell is generally divided into a first shell and a second shell, the first shell is formed on the outside of the first terminal, and the second shell is formed on the outside of the second terminal. Among them, the first shell and the second shell have a buckle structure that fits each other to assemble, so as to install the first shell and the second shell, and further limit and fix the first terminal and the second terminal.

[0190] In a specific implementation, the first shell is a part of the first injection molded insulator that is injection molded together with the first injection molded insulator. It can also be an injection molded member that is independently molded with the first injection molded insulator.

[0191] In a specific implementation, the second shell is a part of the second injection molded insulator that is injection molded together with the second injection molded insulator. It can also be an injection molded member that is independently molded with the second injection molded insulator.

[0192] Specifically, the first shell wraps the copper bar and the tubular conductive part of the first terminal, and part of the copper bar is located outside the first shell to connect the conductor of the liquid cooling cable. The second shell reports the tubular part and part of the flat part of the second terminal, and part of the flat part is located outside the second shell to connect the external electrical equipment of the electrical connector and realize electrical connection.

[0193] Embodiment four

[0194] The present embodiment four provides a battery device, which comprises a plurality of battery packs and a plurality of electrical connector assemblies.

[0195] In the present embodiment, the electrical connector assembly comprises two electrical connectors and a liquid cooling cable, and the two electrical connectors are connected to the two ends of the liquid cooling cable, respectively. The electrical connector assembly can electrically connect any two battery packs.

[0196] Specifically, the electrical connector is the same as that described in Embodiment 1, Embodiment 2, or Embodiment 3, and the product structure and implementation method are completely identical to those of the electrical connectors described in Embodiment 1, Embodiment 2, or Embodiment 3. The electrical connector assembly of the battery device has the corresponding function of an electrical connector, which can improve the current carrying capacity of the electrical connector assembly and effectively solve the heat dissipation problem of the electrical connector assembly.

[0197] Understandably, the primary function of electrical connector assemblies is to establish electrical connections between battery packs, ensuring the transmission and distribution of electrical energy. They allow the flow of electrical energy between battery packs and between battery packs and external circuits (such as charging devices, power electronic devices, etc.).

[0198] On the other hand, liquid-cooled cables are part of the electrical connector assembly. They are connected to the fluid channels of the electrical connector and have the same function: to cool the cable through the circulating cooling medium. This provides a physical channel for the circulation of the fluid medium and also provides heat dissipation for the cable, preventing overheating under high current loads.

[0199] In one specific implementation, the liquid-cooled cable has a built-in conductor and a cooling pipe, and the cooling pipe is connected to the fluid channel of the terminal body of the two electrical connectors respectively; the fluid channel of the terminal body of the two electrical connectors of each electrical connector assembly and the cooling pipe of the liquid-cooled cable together form a cooling channel.

[0200] The connecting pipes of multiple battery packs connect multiple electrical connector assemblies in sequence, and together with multiple connecting pipes and multiple cooling channels, they form a cooling pipeline.

[0201] Understandably, the conductors built into the liquid-cooled cable are used to transmit electrical energy, while the cooling tubes are used to transport the cooling medium. This design allows the cable to both transmit electrical energy and manage heat. Liquid-cooled cables are existing products in the art. Specifically, the cooling tubes of the liquid-cooled cable can be connected to the first terminal of the electrical connector to form a cooling channel. The terminal bodies of the two electrical connectors in each electrical connector assembly have fluid channels that connect to the cooling tubes of the liquid-cooled cable, together forming a cooling channel. This design allows the cooling medium to enter from one end of the electrical connector assembly and exit from the other end, effectively managing the heat generated by the electrical connector itself.

[0202] In this embodiment, the electrical connection between the electrical connector and the battery pack is a conventional technique in the art. To achieve the connection of cooling pipes between the electrical connector assemblies, this embodiment provides a specific implementation method:

[0203] like Figure 2As shown, the battery pack is provided with a connecting pipe for connecting different electrical connector assemblies installed on the same battery pack; wherein the connecting pipe is connected with the terminal body of the electrical connector, and the connecting pipe is in communication with the fluid channel of the terminal body.

[0204] It can be understood that the connecting pipe is connected with the terminal body of the electrical connector, and is in communication with the fluid channel of the terminal body, and the connecting pipe is responsible for the circulation of the cooling medium and is not responsible for the transmission of the current, for realizing the thermal management of the electrical connector assembly. The fluid channel communication of the connecting pipe allows the cooling medium to circulate and flow in the multiple electrical connector assemblies, helping to dissipate the heat generated during the operation of the electrical connector assembly and keeping it working within a suitable temperature range.

[0205] As shown in Figure 2 and Figure 10 The connecting pipes of the multiple battery packs sequentially connect the multiple electrical connector assemblies, and the multiple connecting pipes and the multiple cooling channels together constitute a cooling pipeline.

[0206] It can be understood that the cooling medium can circulate and sequentially flow into the cooling channel of each electrical connector assembly under the connection of the connecting pipe, ensuring the temperature control and thermal management of the electrical connector assemblies of the entire battery device. The electrical connectors and liquid-cooled cables of the electrical connector assemblies will generate heat when transmitting large current in a large current and large power scenario. The cooling medium can prevent overheating by reducing the temperature of the electrical connector / liquid-cooled cable conductor, thereby allowing the electrical connector assembly to work at a higher current and improving its current-carrying capacity.

[0207] In a preferred implementation, the inner wall of the entire fluid channel is provided with an insulating layer for isolating the terminal body from direct contact with the cooling medium; the connecting pipe and the cooling pipe of the liquid-cooled cable are both insulating pipes.

[0208] It can be understood that under the above design, the entire cooling pipeline has insulation characteristics and can be compatible with the use of multiple cooling media. The insulating layer is used to isolate the terminal body from direct contact with the cooling medium, which is to prevent electrical short circuit or leakage and ensure the electrical safety of the electrical connector. It also satisfies the compatibility of the battery device in multiple scenarios.

[0209] Regarding the battery device of the present application, it is part of the battery energy storage system, and can also be a battery energy device of other related equipment.

[0210] For example, the application scenarios of the battery device can be as follows:

[0211] 1. New energy vehicles: the battery device serves as the power source of new energy vehicles. Liquid cooling technology is particularly important in large current battery devices for thermal management of electrical connector assemblies to improve safety.

[0212] 2. Solar and wind energy storage: The battery device is used for the storage of solar and wind energy, providing a new solution for the application of renewable energy.

[0213] 3. Commercial / industrial emergency power supply: The battery device can be used as an emergency power supply to provide energy support for stations, airports, etc. during power outages.

[0214] 4. Energy storage applications: Mainly used in base stations, computer room power supplies, clean energy storage, power grid power storage, home light storage systems, etc.

[0215] Example five

[0216] This embodiment five provides a battery energy storage system, which comprises the battery pack in embodiments one, two and three.

[0217] In another specific implementation of this embodiment five, the battery energy storage system comprises the battery device of embodiment four.

[0218] Example six

[0219] This embodiment six provides a battery energy storage system, which comprises:

[0220] a plurality of battery packs, each battery pack being internally provided with a connecting pipe;

[0221] a plurality of electrical connector assemblies, each electrical connector assembly comprising two electrical connectors and a liquid-cooled cable, the two electrical connectors being connected to the two ends of the liquid-cooled cable respectively, and the electrical connector assembly being capable of electrically connecting any two battery packs;

[0222] wherein the electrical connector comprises a terminal body, the inside of the terminal body being hollow to form a fluid passage, the fluid passage having a first opening and a second opening on the outer wall of the terminal body; the fluid passage is used for the flow of cooling medium, and the cooling medium can enter the inside of the terminal body through the first opening or the second opening;

[0223] the liquid-cooled cable is internally provided with a cooling pipe, the cooling pipe being in communication with the fluid passages of the terminal bodies of the two electrical connectors respectively; the fluid passages of the terminal bodies of the two electrical connectors of each electrical connector assembly and the cooling pipe of the liquid-cooled cable together constitute a cooling channel;

[0224] the connecting pipe is used to connect different electrical connector assemblies installed on the same battery pack; the connecting pipe is connected to the terminal body of the electrical connector, and the connecting pipe is in communication with the fluid passage of the terminal body; the connecting pipes of the plurality of battery packs sequentially connect the cooling channels of the plurality of electrical connectors, and the plurality of connecting pipes and the plurality of cooling channels together constitute a cooling pipeline.

[0225] Specifically, the electric connector is the electric connector described in Embodiment One, Embodiment Two or Embodiment Three, and the product structure and the implementation manner are the same as those of the electric connector described in Embodiment One, Embodiment Two or Embodiment Three. The electric connector assembly of the battery energy storage system has the corresponding functions of the electric connector, can improve the current carrying capacity of the electric connector assembly, and can well solve the heat dissipation problem of the electric connector assembly.

[0226] It can be understood that the main function of the electric connector assembly is to realize the electrical connection between the battery packs and ensure the transmission and distribution of electric energy. They allow the flow of electric energy between the battery packs and between the battery packs and external circuits (such as charging devices, power electronic devices, etc.).

[0227] On the other hand, the liquid-cooled cable is part of the electric connector assembly, which is connected to the fluid channel of the electric connector and has the same function, which is to cool the cable by circulating the cooling medium, that is, to provide a physical channel for the circulating flow of the fluid medium and to provide a heat dissipation function for the cable to prevent overheating under large current flow.

[0228] In a specific implementation, the liquid-cooled cable is internally provided with a conductor and a cooling pipe, and the cooling pipe is connected to the fluid channel of the terminal body of the two electric connectors, respectively; the fluid channel of the terminal body of the two electric connectors of each electric connector assembly and the cooling pipe of the liquid-cooled cable together constitute a cooling channel.

[0229] Among them, the connecting pipes of the plurality of battery packs sequentially connect the plurality of electric connector assemblies, and the plurality of connecting pipes and the plurality of cooling channels together constitute a cooling pipeline.

[0230] It can be understood that the conductor internally provided in the liquid-cooled cable is used to transmit electric energy, and the cooling pipe is used to transmit cooling medium, which makes the cable not only transmit electric energy but also manage heat. The liquid-cooled cable is a product in the prior art. Specifically, the cooling pipe of the liquid-cooled cable can be connected to the first terminal of the electric connector to communicate the cooling channel. The terminal body of the two electric connectors of each electric connector assembly has a fluid channel, and the fluid channels are connected to the cooling pipe of the liquid-cooled cable to together constitute a cooling channel. Such a design allows the cooling medium to enter from one end of the electric connector assembly and flow out from the other end of the electric connector assembly to effectively manage the heat generated by the electric connector itself.

[0231] In this embodiment, the electrical connection of the electric connector to the battery pack is a common technical means in the art. In order to realize the communication of the cooling pipeline between the electric connector assemblies, this embodiment provides a specific implementation manner:

[0232] As Figure 2As shown, the battery pack is provided with a connecting pipe for connecting different electrical connector assemblies installed on the same battery pack; wherein the connecting pipe is connected with the terminal body of the electrical connector, and the connecting pipe is in communication with the fluid channel of the terminal body.

[0233] It can be understood that the connecting pipe is connected with the terminal body of the electrical connector, and is in communication with the fluid channel of the terminal body. The connecting pipe is responsible for the circulation of the cooling medium and is not responsible for the transmission of electric current, and is used to achieve the thermal management of the electrical connector assembly. The fluid channel communication of the connecting pipe allows the cooling medium to circulate and flow in the multiple electrical connector assemblies, helping to dissipate the heat generated during the operation of the electrical connector assembly and keeping it working within a suitable temperature range.

[0234] As shown in Figure 2 and Figure 10 The connecting pipes of the multiple battery packs sequentially connect the multiple electrical connector assemblies, and the multiple connecting pipes and the multiple cooling channels together form a cooling pipeline.

[0235] It can be understood that the cooling medium can circulate and sequentially flow into the cooling channel of each electrical connector assembly under the connection of the connecting pipe, ensuring the temperature control and thermal management of the electrical connector assemblies of the entire battery energy storage system. The electrical connectors and liquid-cooled cables of the electrical connector assembly will generate heat when transmitting large current in a large current and large power scenario. The cooling medium can prevent overheating by reducing the temperature of the electrical connector / liquid-cooled cable conductor, thereby allowing the electrical connector assembly to work at a higher current and improving its current-carrying capacity.

[0236] In a preferred implementation, the inner wall of the entire fluid channel is provided with an insulating layer for isolating the terminal body from direct contact with the cooling medium; the connecting pipe and the cooling pipe of the liquid-cooled cable are both insulated pipes.

[0237] It can be understood that under the above design, the entire cooling pipeline has insulation properties and can be compatible with the use of multiple cooling media. The insulating layer is used to isolate the terminal body from direct contact with the cooling medium, which is to prevent electrical short circuit or electric leakage and ensure the electrical safety of the electrical connector. It also satisfies the compatibility of the battery energy storage system in various scenarios.

[0238] A battery energy storage system is a device that uses battery technology to store electrical energy, which can release electrical energy during peak demand or power shortage, optimizing power management. Here is an explanation of the battery energy storage system:

[0239] Key components of the battery energy storage system:

[0240] Battery pack: The main component of the energy storage system, composed of multiple battery packs. Common battery types include lithium-ion batteries, lead-acid batteries, sodium-sulfur batteries, etc.

[0241] PCS (Power Conversion System): controls the charging and discharging process of the battery pack, and converts AC to DC.

[0242] BMS (Battery Management System): responsible for monitoring, evaluating, protecting, and balancing the battery, analyzing the battery state through the feedback of cell temperature, voltage, and other information from the controlled module (BMU), and providing protection for the cell.

[0243] EMS (Energy Management System): responsible for data acquisition, network monitoring, and energy scheduling, etc. Through communication with PCS (Power Conversion System) and BMS (Battery Management System), it completes the charging and discharging operation of the energy storage system.

[0244] Application scenarios: battery energy storage systems can be used for renewable energy integration, grid regulation, electric vehicle charging stations, user-side energy storage, and backup power, etc.

[0245] (1) Grid services and management: battery energy storage systems can quickly respond to changes in grid demand, helping to maintain the stability of grid frequency, ensuring the continuity and quality of power supply. Release stored energy during peak power demand, and charge during low demand, to achieve grid balance and optimization.

[0246] (2) Commercial applications: in the event of power outages or sudden power failures, battery energy storage systems can immediately provide power for critical loads. It can also purchase and store electricity at low prices, and use or sell it at high prices, thereby saving electricity costs or generating economic benefits.

[0247] (3) Integrated PV storage and charging system:

[0248] The PV storage and charging system integrates photovoltaic power generation, energy storage, and charging facilities, and can generate electricity through photovoltaic panels during sunny days and store excess electricity in batteries for use at night or on cloudy days. Main application scenarios include new energy vehicle charging stations, highway service areas, parking lots, and industrial parks.

[0249] (4) Microgrid + energy storage:

[0250] In remote areas such as islands, install off-grid intelligent island microgrid, use energy management system to accurately coordinate and control power generation, energy storage, and power consumption conditions, realize "source-grid-load-storage" coordinated control and economic operation.

[0251] (5) Mining area + energy storage:

[0252] In oil exploration, coal mining, and other areas, after configuring the energy storage system, when the grid side fails or needs to stop power supply for normal maintenance, the PCS (Power Conversion System) can convert the DC in the battery system to AC to supply power to the user side.

[0253] (6) Energy source of electric vehicle: battery energy storage system as power battery system of new energy vehicle.

[0254] Other structures of the battery pack, the battery device, and the battery energy storage system described in this embodiment refer to prior art.

[0255] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Any modification, equivalent change, and modification of the above embodiment based on the technical essence of the present application, without departing from the technical solution content of the present application, still belongs to the scope of the technical solution of the present application.

Claims

1. A battery pack to which a plurality of electrical connectors are connected, characterized by, The electric connector comprises a terminal body; The inside of the terminal body is hollow to form a fluid channel, the fluid channel has a first opening and a second opening on the outer wall of the terminal body; The fluid channel is used for flowing cooling medium, and the cooling medium can enter the inside of the terminal body through the first opening or the second opening.

2. The battery pack of claim 1, wherein: An insulating layer is arranged on the inner wall of the entire fluid channel, and the insulating layer is used to isolate the terminal body from directly contacting the cooling medium.

3. The battery pack of claim 1, wherein: The terminal body is composed of a first terminal and a second terminal connected to each other; The inside of the first terminal has a first channel, and the first opening is arranged on the outer wall of the first terminal; The inside of the second terminal has a second channel, and the second opening is arranged on the outer wall of the second terminal; When the first terminal and the second terminal are assembled into the terminal body, the first channel and the second channel are communicated and jointly form the fluid channel.

4. The battery pack of claim 3, wherein: A first insulating injection body is arranged in the cavity of the first terminal, and the inside of the first insulating injection body is hollow to form the first channel; A second insulating injection body is arranged in the cavity of the second terminal, and the inside of the second insulating injection body is hollow to form the second channel; When the first terminal and the second terminal are assembled into the terminal body, the first insulating injection body and the second insulating injection body are in sealed contact.

5. A battery device characterized by comprising: The battery device comprises: A plurality of battery packs; A plurality of electric connector assemblies, each electric connector assembly comprising two electric connectors and a liquid cooling cable, the two electric connectors being connected to two ends of the liquid cooling cable respectively, and the electric connector assembly being capable of electrically connecting any two battery packs; The electric connector comprises a terminal body, the inside of the terminal body is hollow to form a fluid channel, the fluid channel has a first opening and a second opening on the outer wall of the terminal body; the fluid channel is used for flowing cooling medium, and the cooling medium can enter the inside of the terminal body through the first opening or the second opening.

6. The battery device of claim 5, wherein: The battery pack is provided with a connecting pipe, the connecting pipe being used for connecting different electric connector assemblies installed on the same battery pack; The connecting pipe is connected to the terminal body of the electric connector, and the connecting pipe is communicated with the fluid channel of the terminal body.

7. The battery device of claim 6, wherein: The liquid cooling cable is provided with a cooling pipe, the cooling pipe being communicated with the fluid channel of the terminal body of the two electric connectors respectively; the fluid channel of the terminal body of the two electric connectors of each electric connector assembly and the cooling pipe of the liquid cooling cable jointly form a cooling channel; The connecting pipes of the plurality of battery packs sequentially connect the plurality of electric connector assemblies, and the plurality of connecting pipes and the plurality of cooling channels jointly form a cooling pipeline.

8. The battery device of claim 7, wherein: An inner wall of the whole fluid passage is provided with an insulation layer for isolating the terminal body from direct contact with the cooling medium; The connecting pipe and the cooling pipe of the liquid-cooled cable are both insulated pipes.

9. A battery energy storage system characterized by, The battery pack according to any one of claims 1 to 4; or the battery device according to any one of claims 5 to 8.

10. A battery energy storage system characterized by, The battery energy storage system comprises: A plurality of battery packs, each of which is provided with a connecting pipe; A plurality of electrical connector assemblies, each of which comprises two electrical connectors and a liquid-cooled cable, the two electrical connectors being connected to the two ends of the liquid-cooled cable respectively, and the electrical connector assembly being capable of electrically connecting any two battery packs; The electrical connector comprises a terminal body, the inside of the terminal body being hollow to form a fluid passage, the fluid passage having a first opening and a second opening on the outer wall of the terminal body; the fluid passage is used for flowing of a cooling medium, and the cooling medium can enter the inside of the terminal body through the first opening or the second opening; The liquid-cooled cable is provided with a cooling pipe, the cooling pipe being connected to the fluid passage of the terminal body of the two electrical connectors respectively; the fluid passage of the terminal body of the two electrical connectors of each electrical connector assembly and the cooling pipe of the liquid-cooled cable jointly form a cooling passage; The connecting pipe is used for connecting different electrical connector assemblies installed on the same battery pack; the connecting pipe is connected to the terminal body of the electrical connector, and the connecting pipe is connected to the fluid passage of the terminal body; the connecting pipes of the plurality of battery packs sequentially connect the cooling passages of the plurality of electrical connectors, and the plurality of connecting pipes and the plurality of cooling passages jointly form a cooling pipeline.

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