Battery device, energy storage device, power utilization device and charging network

Abstract

The utility model relates to the technical field of batteries. The utility model provides a battery device, an energy storage device, a power utilization device and a charging network. The battery device comprises a battery cell assembly, a bus assembly, a connector assembly and a sealing cover assembly. Wherein the battery monomer assembly is used for receiving or providing electric energy. And the confluence assembly is electrically connected with the battery monomer assembly. The connector assembly includes a connection terminal and a wire harness. The first end of the wire harness is electrically connected with the confluence assembly, and the second end of the wire harness is electrically connected with the connecting terminal. The sealing cover assembly is provided with a sealing cavity, and the connecting terminal is located in the sealing cavity. According to the battery device, the connecting terminal can be protected, and when the battery monomer assembly is subjected to thermal runaway, high-temperature electrolyte steam can be effectively prevented from entering the connecting terminal, so that the risk of short circuit of the connecting terminal is remarkably reduced, and the reliability of the battery device is favorably improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery device, an energy storage device, an electrical device, and a charging network. Background Technology

[0002] Currently, CCS (Cells Contact System) is generally used for battery temperature sampling and cell voltage sampling, providing the collected data to the battery management system via connector assemblies. However, when a cell experiences thermal runaway, it can cause the connector assembly to short-circuit, damaging the low-voltage control. Utility Model Content

[0003] In view of this, embodiments of this application provide a battery device, an energy storage device, an electrical device, and a charging network, which can protect the connection terminals of the connector assembly, reduce the risk of short circuit in the connector assembly, and improve the reliability of the battery device.

[0004] Therefore, according to a first aspect of the embodiments of this application, a battery device is provided, the battery device comprising: a battery cell assembly for receiving or providing electrical energy; a busbar assembly electrically connected to the battery cell assembly; a connector assembly including a connection terminal and a wire harness, a first end of the wire harness being electrically connected to the busbar assembly and a second end of the wire harness being electrically connected to the connection terminal; and a sealing cover assembly having a sealing chamber, the connection terminal being located within the sealing chamber.

[0005] The battery device provided in this application includes a battery cell assembly, a busbar assembly, a connector assembly, and a sealing cover assembly.

[0006] By placing the connection terminals within a sealed chamber, the connection terminals can be protected. When thermal runaway occurs in a battery cell assembly, it can effectively prevent high-temperature electrolyte vapor from entering the connection terminals, thereby significantly reducing the risk of short circuits in the connection terminals, avoiding damage to the low-voltage control due to short circuits, and improving the reliability of the battery device.

[0007] Optionally, the sealing cover assembly includes a protective cover and a seal, wherein the protective cover has a sealing chamber and the seal is disposed between the wire harness and the cavity wall of the sealing chamber.

[0008] By installing a seal between the wiring harness and the wall of the sealed chamber, the gap between them can be sealed, thus improving the sealing performance of the sealed chamber. When a battery cell experiences thermal runaway, it effectively prevents high-temperature electrolyte vapor from entering the connection terminals through the gap between the wiring harness and the sealed chamber wall, further reducing the risk of short circuits at the connection terminals after thermal runaway and improving the reliability of low-voltage control.

[0009] Optionally, the seal is connected to the wall of the sealed chamber.

[0010] In other words, the seal is fixedly installed on the protective cover, which not only seals the gap between the wire harness and the wall of the sealing chamber, but also improves the installation stability of the seal and reduces the risk of the seal falling out of the gap between the wire harness and the wall of the sealing chamber, thus causing the seal to fail.

[0011] Optionally, the battery device further includes an adhesive component, wherein the seal is connected to the cavity wall of the sealed chamber via the adhesive component.

[0012] In other words, the seal is fixed to the protective cover using adhesive. This serves two purposes: firstly, it ensures the seal is securely mounted on the protective cover; secondly, it seals the gap between the seal and the wall of the sealing chamber, effectively improving the sealing performance of the chamber and further preventing high-temperature electrolyte vapor from penetrating into the chamber, thus reducing the risk of short circuits.

[0013] Optionally, the side of the seal closest to the wire harness abuts against the outer wall of the wire harness.

[0014] In other words, the inner surface of the seal contacts the outer wall of the wire harness, thereby improving the sealing effect on the sealed chamber and preventing the formation of gaps between the inner surface of the seal and the outer wall of the wire harness, further hindering the penetration of high-temperature electrolyte vapor into the sealed chamber.

[0015] Optionally, the cross-sectional area of ​​the side of the seal closest to the wiring harness in the first direction is smaller than the cross-sectional area of ​​the wiring harness in the first direction.

[0016] In other words, after the protective cover is installed, the seal has a certain amount of compression. The seal is compressed and comes into contact with the wire harness, so that the seal and the wire harness are pressed together, which helps to further improve the sealing effect of the sealing chamber.

[0017] Furthermore, since the seal and the wiring harness are pressed together, there is no need for additional sealing treatment such as wrapping tape. This ensures the sealing effect of the sealed chamber, simplifies the structure of the battery device, and improves the installation efficiency of the battery device.

[0018] Optionally, the seal may include a heat-resistant element; and / or the seal may include a sealing ring.

[0019] Since the seal is a heat-resistant component, meaning it has high-temperature resistance, it can prevent high-temperature electrolyte vapor from penetrating into the sealed cavity, reducing the risk of short circuits, while also extending the service life of the seal and improving the sealing reliability of the sealed cavity.

[0020] Since the seal is a sealing ring, which is set around the outer periphery of the wire harness, it helps to further improve the sealing effect of the sealing chamber.

[0021] Optionally, the protective cover also has a first opening that communicates with the sealed chamber, and the second end of the wire harness extends into the sealed chamber through the first opening; wherein the seal is configured to be close to the first opening.

[0022] In other words, the wire harness extends into the sealed cavity through the first opening and is electrically connected to the connecting terminal. Because the seal is located close to the first opening, that is, near the entrance of the wire harness, it can prevent high-temperature electrolyte vapor from entering the sealed cavity, which helps to improve the protection effect.

[0023] Optionally, the protective cover includes: a first cover body; and a second cover body connected to the first cover body, which together encloses a sealed cavity and a first opening.

[0024] In other words, the protective cover has a modular structure, which, compared to a one-piece structure, makes assembly easier, simplifies installation, and improves efficiency. Furthermore, the modular structure facilitates manufacturing and demolding, reducing mold costs.

[0025] Optionally, the seal includes: a first sealing portion disposed on the first cover, the first sealing portion including a first recess; and a second sealing portion disposed on the second cover, the second sealing portion including a second recess, the second recess and the first recess forming an opening, the wire harness being located within the opening.

[0026] After the first and second covers are assembled, a seal is formed between the wire harness and the cavity wall of the sealed chamber, achieving the effect of sealing upon installation and greatly improving installation efficiency.

[0027] Optionally, the cross-sectional area of ​​the second recess in the first direction is greater than the cross-sectional area of ​​the first recess in the first direction.

[0028] When installing the protective cover, the wire harness can be positioned using the second recess with a larger volume, and then the first and second covers can be assembled. This helps to reduce the difficulty of installing the protective cover and further improves the installation efficiency.

[0029] Optionally, the first cover is provided with a first sealing groove, which is located outside the sealing chamber along the first direction; the second cover is provided with a first sealing edge, at least a portion of which is inserted into the first sealing groove and abuts against the groove wall of the first sealing groove.

[0030] Since at least part of the first sealing edge is inserted into the first sealing groove and the first sealing edge abuts against the groove wall of the first sealing groove, the mating path between the first cover and the second cover can be extended, thereby further improving the sealing effect of the sealing chamber.

[0031] Optionally, the second cover is further provided with a second sealing groove. Along the first direction, at least a portion of the second sealing groove is located on the side of the first sealing groove away from the sealing chamber. The side wall of the first sealing edge away from the sealing chamber constitutes part of the groove wall of the second sealing groove. The first cover is further provided with a second sealing edge. The side wall of the second sealing edge near the sealing chamber constitutes part of the groove wall of the first sealing groove. At least a portion of the second sealing edge is inserted into the second sealing groove.

[0032] In other words, the first sealing groove and the second sealing groove are formed into a Z-shaped sealing structure, which can further extend the mating path between the first cover and the second cover, and improve the sealing effect of the sealing chamber without affecting the assembly of the first cover and the second cover.

[0033] Optionally, the battery device further includes: a plurality of snap-fit ​​structures disposed in at least one of the first cover and the second cover, the first cover and the second cover being connected by the plurality of snap-fit ​​structures.

[0034] Since the first cover and the second cover are connected by multiple snap-fit ​​structures, reliable assembly between the first cover and the second cover is achieved, which helps to improve installation efficiency.

[0035] Optionally, at least one snap-fit ​​structure is configured to be close to the first opening.

[0036] Since the seal is located close to the first opening, by placing at least one snap-fit ​​structure close to the first opening, the connection stability between the first cover and the second cover is improved, ensuring a tight fit between the seal and the wall of the sealing chamber, as well as between the seal and the wire harness after assembly, which helps to improve the sealing performance at the first opening.

[0037] Optionally, at least one snap-fit ​​structure is located within the sealed cavity.

[0038] Since at least one snap-fit ​​structure is located within the sealed cavity, reliable assembly between the first and second covers is achieved while reducing the risk of interference between the protective cover and the structural components of the battery management system, which helps to further improve the overall reliability of the energy storage device.

[0039] Optionally, at least one of the first cover and the second cover has a relief groove on the side facing away from the sealed chamber, and at least one snap-fit ​​structure is located in the relief groove.

[0040] In other words, a clearance groove is provided on the outer side of the first cover and / or the second cover. With at least one snap-fit ​​structure located on the outer side, at least one snap-fit ​​structure is located within the clearance groove, thereby achieving reliable assembly between the first cover and the second cover while reducing the risk of interference with the structural components of the battery management system due to exposed snap-fit ​​structures, which is beneficial to further improving the overall reliability of the energy storage device.

[0041] Optionally, at least one snap-fit ​​structure includes: a snap fastener disposed in one of the first cover and the second cover; and a slot disposed in the other of the first cover and the second cover, wherein the snap fastener is inserted into the slot.

[0042] Because the buckle is inserted into the slot, reliable assembly between the first and second covers is achieved, which helps to further reduce the installation difficulty of the protective cover and significantly improve the installation efficiency of the protective cover.

[0043] Optionally, the protective cover includes a polypropylene protective cover.

[0044] In other words, the protective cover is made of polypropylene. It's understandable that polypropylene is a rigid plastic, which allows for protection of the connection terminals, reducing the risk of short circuits, while also facilitating the connection between the protective cover and external components (battery management system), ensuring proper insertion and improving the installation stability and reliability of the protective cover.

[0045] Optionally, the sealing cover assembly has a grip on the side opposite to the sealing chamber.

[0046] In other words, by providing a grip on the outside of the sealing cover assembly, installers can assemble the sealing cover assembly by operating the grip, which improves the ease of installation and increases installation efficiency.

[0047] Optionally, the end of the sealing cover assembly away from the wiring harness includes a plug portion for connecting an external component; wherein the plug portion includes a second opening communicating with the sealing chamber, and a connection terminal is electrically connected to the external component through the second opening.

[0048] In other words, the sealing cover assembly has a connector at the head and a seal at the tail. The connector allows the sealing cover assembly to be plugged into an external component (battery management system), improving the reliability of the electrical connection between the connection terminals and the external component. Simultaneously, in the event of thermal runaway in a single battery cell, it prevents high-temperature electrolyte vapor from entering the sealed chamber, reducing the risk of short circuits and improving the reliability of low-voltage control.

[0049] A second aspect of this application provides an energy storage device, including a battery device and a battery management system as described in the first aspect of this application, wherein the battery management system is electrically connected to a connection terminal. Since the energy storage device includes the battery device as described in the first aspect of this application, it possesses all the beneficial technical effects of that battery device, which will not be elaborated further here.

[0050] A third aspect of this application provides an electrical device that includes the battery device of the first aspect of this application. Since the electrical device includes the battery device of the first aspect of this application, it possesses all the beneficial technical effects of that battery device, which will not be elaborated further here.

[0051] A fourth aspect of this application provides a charging network that includes a battery device from the first aspect of this application or an energy storage device from the second aspect of this application. Since the charging network includes the battery device from the first aspect of this application or the energy storage device from the second aspect of this application, it possesses all the beneficial technical effects of the battery device or the energy storage device, which will not be elaborated further here.

[0052] Additional aspects and advantages of embodiments of this application will be set forth in the following description, in part will be obvious from the description or may be learned by practice of embodiments of this application. Attached Figure Description

[0053] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0054] Figure 1 This is a schematic diagram of the structure of the energy storage device in some embodiments of this application;

[0055] Figure 2 This is a schematic diagram of the battery pack structure in some embodiments of this application;

[0056] Figure 3 This is a schematic diagram of the charging network structure in some embodiments of this application;

[0057] Figure 4 This is a schematic diagram of the structure of the battery device in some embodiments of this application;

[0058] Figure 5 This is a partial structural schematic diagram of the battery device in some embodiments of this application;

[0059] Figure 6 This is one of the structural schematic diagrams of the sealing cover assembly in some embodiments of this application;

[0060] Figure 7 This is a second schematic diagram of the structure of the sealing cover assembly in some embodiments of this application;

[0061] Figure 8 This is the third schematic diagram of the structure of the sealing cover assembly in some embodiments of this application;

[0062] Figure 9 This is the fourth schematic diagram of the structure of the sealing cover assembly in some embodiments of this application;

[0063] Figure 10 This is the fifth of several schematic diagrams showing the structure of the sealing cover assembly in some embodiments of this application;

[0064] Figure 11 This is the sixth of several schematic diagrams showing the structure of the sealing cover assembly in some embodiments of this application;

[0065] Figure 12 This is the seventh of several schematic diagrams showing the structure of the sealing cover assembly in some embodiments of this application;

[0066] Figure 13 This is one of the structural schematic diagrams of the first cover in some embodiments of this application;

[0067] Figure 14 This is a second schematic diagram of the structure of the first cover in some embodiments of this application;

[0068] Figure 15 This is the third of three structural schematic diagrams of the first cover in some embodiments of this application;

[0069] Figure 16 This is one of the structural schematic diagrams of the second cover in some embodiments of this application;

[0070] Figure 17 This is a second schematic diagram of the structure of the second cover in some embodiments of this application;

[0071] Figure 18 This is the third of three structural schematic diagrams of the second cover in some embodiments of this application.

[0072] in, Figures 1 to 18 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0073] 1. Energy storage device; 10. Housing; 20. Battery management system;

[0074] 30 Battery device; 31 Battery cell assembly; 32 Busbar assembly; 33 Connector assembly; 332 Connection terminal; 334 Wiring harness; 34 Protective cover; 341 Sealed chamber; 342 First opening; 343 First cover; 344 Second cover; 345 First sealing groove; 346 First sealing edge; 347 Second sealing groove; 348 Second sealing edge; 349 Clearance groove; 35 Sealing cover assembly; 351 Sealing element; 352 First sealing part; 353 First recess; 354 ​​Second sealing part; 355 Second recess; 356 Through; 36 Adhesive part; 37 Snap-fit ​​structure; 372 Buckle; 374 Slot; 38 Insertion part; 382 Second opening; 39 Grip part;

[0075] 4. Charging network; 40. Charging piles; 72. Upper enclosure; 74. Lower enclosure. Detailed Implementation

[0076] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0077] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0078] Currently, with the promotion and popularization of the concept of green development, new energy batteries are being used more and more widely in daily life and industry.

[0079] In related technologies, to ensure that batteries can operate within specified voltage and temperature ranges, a CCS (Cells Contact System) is generally required to collect voltage and temperature signals from individual battery cells. The integrated busbar connects to the battery management system (BMS) via connectors to transmit the collected data, enabling the BMS to monitor and manage the battery pack. However, when a battery cell experiences thermal runaway, high-temperature electrolyte vapor can easily enter the connector, causing a short circuit, damaging low-voltage control, and affecting the overall reliability of the battery device and energy storage system.

[0080] Based on the above considerations, embodiments of this application provide a battery device including a sealing cover assembly. The connection terminal is located in the sealed cavity of the sealing cover assembly, which protects the connection terminal. When the battery cell assembly experiences thermal runaway, it can effectively prevent high-temperature electrolyte vapor from entering the connection terminal, thereby significantly reducing the risk of short circuit at the connection terminal, avoiding damage to the low-voltage control due to short circuit, and improving the reliability of the battery device.

[0081] The battery device disclosed in this application can be a battery pack, battery cabinet, or energy storage container. Exemplarily, the battery device is used in an energy storage device. Optionally, the energy storage device may include one or more battery clusters to increase the voltage and capacity of the energy storage device. A battery cluster may include multiple battery devices connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device. The application of battery devices in this energy storage device can improve the reliability of the energy storage device.

[0082] like Figure 1 As shown, exemplarily, the energy storage device 1 may include a housing 10, a battery device 30, and a battery management system 20. The number of battery devices 30 may be multiple.

[0083] Optionally, the energy storage device 1 can be an energy storage cabinet or an energy storage container.

[0084] like Figure 2 As shown, exemplarily, the battery device 30 can be a battery pack, which may include an upper housing 72, a lower housing 74, and a battery cell assembly 31. The battery cell assembly 31 is located within the accommodating cavity formed by the upper housing 72 and the lower housing 74.

[0085] The electrical device disclosed in the embodiments of this application can be a vehicle or a charging pile.

[0086] For example, the electrical device is a vehicle, which can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device is installed inside the vehicle, and the battery device can be located at the bottom, front, or rear of the vehicle. The battery device can be used to power the vehicle; for example, the battery device can serve as the vehicle's operating power source. The vehicle may also include a controller and a motor. The controller is used to control the battery to power the motor, for example, to meet the power needs of the vehicle during starting, navigation, and driving.

[0087] This application provides a charging network 4, which includes a charging pile 40 for charging electrical equipment. The charging network 4 may also include an energy storage device 1, which is electrically connected to the charging pile 40 and provides power to the charging pile 40.

[0088] It should be noted that the charging pile 40 is electrically connected to the battery device 30 in the energy storage device 1 via a cable, and the battery device 30 can supply its stored electrical energy to the charging pile 40. The charging pile 40 has a connection device that can be connected to electrical equipment, thereby replenishing the energy of the equipment. The use of the energy storage device 1 in this charging network 4 can effectively improve the reliability of the charging network 4.

[0089] In a charging network 4, there can be one charging pile 40, and the energy storage device 1 provides power to the one charging pile 40; there can also be multiple charging piles 40, and the energy storage device 1 provides power to multiple charging piles 40.

[0090] As an example, such as Figure 3 As shown, the charging network 4 includes an energy storage device 1 and two charging piles 40, with the energy storage device 1 providing power to the two charging piles 40.

[0091] The following reference Figures 4 to 18 The battery device 30 according to the first aspect of the present application is described below. Figure 4 This is a schematic diagram of the structure of the battery device 30 in some embodiments of this application. Figure 5This is a partial structural schematic diagram of the battery device 30 in some embodiments of this application. Figure 6 This is one of the structural schematic diagrams of the sealing cover assembly 35 in some embodiments of this application. Figure 7 This is a second schematic diagram of the structure of the sealing cover assembly 35 in some embodiments of this application. Figure 8 This is the third schematic diagram of the structure of the sealing cover assembly 35 in some embodiments of this application. Figure 9 This is the fourth schematic diagram of the structure of the sealing cover assembly 35 in some embodiments of this application. Figure 10 This is the fifth of several schematic diagrams showing the structure of the sealing cover assembly 35 in some embodiments of this application. Figure 11 This is the sixth of several schematic diagrams showing the structure of the sealing cover assembly 35 in some embodiments of this application. Figure 12 This is the seventh of several schematic diagrams showing the structure of the sealing cover assembly 35 in some embodiments of this application.

[0092] like Figure 4 and Figure 5 As shown, according to a first aspect embodiment of the present application, the battery device 30 includes a battery cell assembly 31, a busbar assembly 32, a connector assembly 33, and a sealing cover assembly 35. The battery cell assembly 31 is used to receive or provide electrical energy. The busbar assembly 32 is electrically connected to the battery cell assembly 31. The connector assembly 33 includes a connection terminal 332 and a wiring harness 334. A first end of the wiring harness 334 is electrically connected to the busbar assembly 32, and a second end of the wiring harness 334 is electrically connected to the connection terminal 332. The sealing cover assembly 35 has a sealing chamber 341, and the connection terminal 332 is located within the sealing chamber 341.

[0093] In some embodiments, the battery cell assembly 31 may include a plurality of battery cells, which are connected in series, parallel or mixed.

[0094] A single battery cell can be a rechargeable battery. A rechargeable battery is a battery cell that can be recharged after it has been discharged, allowing the active materials to be activated and the cell to continue to be used.

[0095] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0096] Battery cells can be cylindrical, flat, cuboid, or other shapes, and this application embodiment is not limited to any of these. Battery cells are generally classified into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and this application embodiment is not limited to any of these types either.

[0097] The busbar assembly 32 is electrically connected to the battery cell assembly 31 to acquire signals such as voltage and temperature signals from the battery cell assembly 31.

[0098] The first end of the wiring harness 334 is electrically connected to the bus assembly 32, and the second end of the wiring harness 334 is electrically connected to the connection terminal 332, which is used to connect to an external component. Optionally, the external component may include the battery management system 20. Because the connection terminal 332 is electrically connected to the external component, the collected data can be transmitted to the external component.

[0099] For example, the battery management system 20 is electrically connected to the connection terminal 332, which can transmit the data collected by the busbar component 32 to the battery management system 20, so as to realize the monitoring and management of the battery device 30 by the battery management system 20.

[0100] In the above embodiment, by placing the connection terminal 332 inside the sealed chamber 341, the connection terminal 332 can be protected. When the battery cell assembly 31 experiences thermal runaway, it can effectively prevent high-temperature electrolyte vapor from entering the connection terminal 332, thereby significantly reducing the risk of short circuit in the connection terminal 332, avoiding damage to the low-voltage control due to short circuit, and improving the reliability of the battery device 30.

[0101] Optionally, the bus component 32 can be a CCS.

[0102] like Figure 6 As shown, in some embodiments, the sealing cover assembly includes a protective cover and a seal. The protective cover has a sealed chamber. The seal is disposed between the wire harness and the wall of the sealed chamber.

[0103] Because a seal 351 is provided between the wiring harness 334 and the cavity wall of the sealed chamber 341, the gap between the wiring harness 334 and the cavity wall of the sealed chamber 341 can be sealed, which helps to improve the sealing performance of the sealed chamber 341. When the battery cell assembly 31 experiences thermal runaway, it can effectively prevent high-temperature electrolyte vapor from entering the connection terminal 332 through the gap between the wiring harness 334 and the cavity wall of the sealed chamber 341, further reducing the risk of short circuit in the connection terminal 332 after the battery cell assembly 31 experiences thermal runaway, which helps to improve the reliability of low-voltage control.

[0104] For example, the protective cover 34 can be a plastic part.

[0105] For example, the plastic part may include a rigid plastic part such as polypropylene.

[0106] For example, plastic parts may include plastic parts such as rubber.

[0107] For example, the seal 351 may be a polypropylene seal, a silicone seal, or a rubber seal.

[0108] In some embodiments, the seal 351 is connected to the cavity wall of the sealing chamber 341.

[0109] In other words, the seal 351 is fixedly installed on the protective cover 34, thereby sealing the gap between the wire harness 334 and the cavity wall of the sealing chamber 341, while improving the installation stability of the seal 351 and reducing the risk of the seal 351 moving out of the gap between the wire harness 334 and the cavity wall of the sealing chamber 341 and causing the seal to fail.

[0110] like Figure 7 As shown, in some embodiments, the battery device 30 further includes an adhesive element 36. The seal 351 is connected to the cavity wall of the sealed chamber 341 via the adhesive element 36.

[0111] In other words, the seal 351 is fixed to the protective cover 34 by the adhesive 36. On the one hand, this allows for the fixed installation of the seal 351 on the protective cover 34. On the other hand, it seals the gap between the seal 351 and the wall of the sealing chamber 341, effectively improving the sealing effect of the sealing chamber 341 and further preventing high-temperature electrolyte vapor from penetrating into the sealing chamber 341, thus reducing the risk of short circuit.

[0112] In some embodiments, the side of the seal 351 near the wire harness 334 abuts against the outer wall of the wire harness 334.

[0113] In other words, the inner surface of the seal 351 is in contact with the outer wall of the wire harness 334, which can improve the sealing effect of the sealing chamber 341, prevent the formation of a gap between the inner surface of the seal 351 and the outer wall of the wire harness 334, and further hinder the high-temperature electrolyte vapor from penetrating into the sealing chamber 341.

[0114] In some embodiments, the cross-sectional area of ​​the side of the seal 351 near the wire harness 334 in the first direction is smaller than the cross-sectional area of ​​the wire harness 334 in the first direction.

[0115] In other words, after the protective cover 34 is installed, the wire harness 334 and the seal 351 are interference-fitted, and the seal 351 has a certain amount of compression. That is, the seal 351 is compressed and comes into contact with the wire harness 334, so that the seal 351 and the wire harness 334 are pressed together, which is conducive to further improving the sealing effect of the sealing chamber 341.

[0116] Furthermore, since the seal 351 and the wiring harness 334 are pressed together, there is no need for additional sealing treatment such as wrapping tape. While ensuring the sealing effect of the sealed chamber 341, it is beneficial to simplify the structure of the battery device 30 and improve the installation efficiency of the battery device 30.

[0117] The first direction can be the radial direction of the seal 351.

[0118] In some embodiments, the seal 351 includes a heat-resistant element; and / or, the seal 351 includes a sealing ring.

[0119] Since the seal 351 is a heat-resistant component, meaning that the seal 351 has high-temperature resistance, it can prevent high-temperature electrolyte vapor from penetrating into the sealing chamber 341, reducing the risk of short circuits, while also helping to extend the service life of the seal 351 and improve the sealing reliability of the sealing chamber 341.

[0120] Optionally, the seal 351 can be a polypropylene (PP) seal, polyethylene terephthalate (PET) or other materials with heat resistance and sealing properties.

[0121] Since the seal 351 is a sealing ring, that is, the seal 351 is arranged around the outer periphery of the wire harness 334, it is beneficial to further improve the sealing effect of the sealing chamber 341.

[0122] like Figure 6 As shown, in some embodiments, the protective cover 34 is further provided with a first opening 342, which communicates with the sealed chamber 341. The second end of the wire harness 334 extends into the sealed chamber 341 through the first opening 342. The seal 351 is configured close to the first opening 342.

[0123] In other words, the wire harness 334 extends into the sealed chamber 341 through the first opening 342 and is electrically connected to the connecting terminal 332. Since the seal 351 is located close to the first opening 342, that is, the seal 351 is located near the entrance of the wire harness 334, it can prevent high-temperature electrolyte vapor from entering the sealed chamber 341, which helps to improve the protection effect.

[0124] For example, when the seal 351 is a sealing ring, the cross-sectional shape of the first opening 342 can be circular to adapt to the structure of the seal 351.

[0125] Figure 13 This is one of the structural schematic diagrams of the first cover 343 in some embodiments of this application. Figure 14 This is the second schematic diagram of the structure of the first cover 343 in some embodiments of this application. Figure 15 This is the third of three structural schematic diagrams of the first cover 343 in some embodiments of this application. Figure 16 This is one of the structural schematic diagrams of the second cover 344 in some embodiments of this application. Figure 17 This is the second schematic diagram of the structure of the second cover 344 in some embodiments of this application. Figure 18 This is the third of three structural schematic diagrams of the second cover 344 in some embodiments of this application.

[0126] like Figure 6 As shown, in some embodiments, the protective cover 34 includes a first cover 343 and a second cover 344. The second cover 344 is connected to the first cover 343 and together with the first cover 343, forms a sealed chamber 341 and a first opening 342.

[0127] In other words, the protective cover 34 has a split structure, which makes it easier for personnel to assemble compared to a one-piece structure, simplifying the installation process and improving installation efficiency. Moreover, the split structure facilitates the processing and manufacturing of the protective cover 34, making demolding easier and reducing mold costs.

[0128] For example, the first cover 343 and the second cover 344 are detachably connected to facilitate assembly and maintenance.

[0129] like Figure 9 As shown, in some embodiments, the seal 351 includes a first sealing portion 352 and a second sealing portion 354. The first sealing portion 352 is disposed on the first cover 343. The first sealing portion 352 includes a first recess 353. The second sealing portion 354 is disposed on the second cover 344. The second sealing portion 354 includes a second recess 355. The second recess 355 and the first recess 353 form an opening 356, within which the wire harness 334 is located.

[0130] In other words, a portion of the seal 351 is disposed on the first cover 343, and the other portion of the seal 351 is disposed on the second cover 344. That is, before the protective cover 34 is assembled, the first sealing part 352 is fixed on the first cover 343, and the second sealing part 354 is fixed on the second cover 344. In other words, the first cover 343 and the first sealing part 352 are made as a single piece, and the second cover 344 and the second sealing part 354 are made as a single piece.

[0131] After the first cover 343 and the second cover 344 are assembled, a seal can be formed between the wire harness 334 and the cavity wall of the sealed chamber 341, achieving the effect of sealing upon installation and greatly improving installation efficiency.

[0132] Furthermore, the first sealing portion 352 has a first recess 353, and the second sealing portion 354 has a second recess 355. The first recess 353 and the second recess 355 form a passage 356, and the wire harness 334 is located within the passage 356. That is, the second end of the wire harness 334 passes through the passage 356 and is electrically connected to the connection terminal 332 within the sealing chamber 341.

[0133] For example, the cross-sectional area of ​​the first recess 353 in the first direction is equal to the cross-sectional area of ​​the second recess 355 in the first direction.

[0134] For example, the cross-sectional area of ​​the first recess 353 in the first direction is greater than the cross-sectional area of ​​the second recess 355 in the first direction.

[0135] For example, the cross-sectional area of ​​the first recess 353 in the first direction is smaller than the cross-sectional area of ​​the second recess 355 in the first direction.

[0136] In some embodiments, the cross-sectional area of ​​the second recess 355 in the first direction is greater than the cross-sectional area of ​​the first recess 353 in the first direction.

[0137] In other words, the volume of the second recess 355 is greater than the volume of the first recess 353. Therefore, when installing the protective cover 34, the wire harness 334 can be positioned using the second recess 355 with its larger volume, and then the first cover 343 and the second cover 344 can be assembled. This helps to reduce the difficulty of installing the protective cover 34 and further improves the installation efficiency.

[0138] like Figure 5 and Figure 13 As shown, in some embodiments, the first cover 343 is provided with a first sealing groove 345, which is located outside the sealing chamber 341 along a first direction. The second cover 344 is provided with a first sealing edge 346. At least a portion of the first sealing edge 346 is inserted into the first sealing groove 345 and abuts against the groove wall of the first sealing groove 345.

[0139] The first direction can be the radial direction of the seal 351, that is, the first sealing groove 345 is located on the radial outer side of the sealing chamber 341.

[0140] Since at least a portion of the first sealing edge 346 is inserted into the first sealing groove 345, and the first sealing edge 346 abuts against the groove wall of the first sealing groove 345, the mating path between the first cover 343 and the second cover 344 can be extended, thereby further improving the sealing effect of the sealing chamber 341.

[0141] For example, the first sealing groove 345 includes a first groove wall and a second groove wall. The first groove wall extends along a first direction, and the second groove wall extends along a second direction. The second direction is perpendicular to the first direction. That is, the first sealing groove 345 is formed as an L-shaped groove, which improves the sealing effect of the sealing chamber 341 and facilitates the assembly between the first cover 343 and the second cover 344.

[0142] like Figure 17As shown, in some embodiments, the second cover 344 further includes a second sealing groove 347. Along the first direction, at least a portion of the second sealing groove 347 is located on the side of the first sealing groove 345 facing away from the sealing chamber 341. The side wall of the first sealing edge 346 facing away from the sealing chamber 341 forms a portion of the groove wall of the second sealing groove 347. The first cover 343 also includes a second sealing edge 348. The side wall of the second sealing edge 348 near the sealing chamber 341 forms a portion of the groove wall of the first sealing groove 345. At least a portion of the second sealing edge 348 is inserted into the second sealing groove 347.

[0143] Since at least a portion of the second sealing groove 347 is located on the side of the first sealing groove 345 away from the sealing chamber 341, that is, at least a portion of the second sealing groove 347 is located outside the first sealing groove 345.

[0144] The outer wall of the first sealing edge 346 forms part of the groove wall of the second sealing groove 347. The inner wall of the second sealing edge 348 forms part of the groove wall (second groove wall) of the first sealing groove 345. That is, the first sealing groove 345 and the second sealing groove 347 form a Z-shaped sealing structure, which can further extend the mating path between the first cover 343 and the second cover 344, and improve the sealing effect of the sealing chamber 341 without affecting the assembly of the first cover 343 and the second cover 344.

[0145] like Figure 9 As shown, in some embodiments, the battery device 30 further includes a plurality of snap-fit ​​structures 37. The plurality of snap-fit ​​structures 37 are disposed in at least one of the first cover 343 and the second cover 344. The first cover 343 and the second cover 344 are connected by the plurality of snap-fit ​​structures 37.

[0146] For example, multiple snap-fit ​​structures 37 are disposed on the first cover 343.

[0147] For example, multiple snap-fit ​​structures 37 are provided on the second cover 344.

[0148] For example, a portion of the multiple snap-fit ​​structures 37 are disposed on the first cover 343, and another portion of the multiple snap-fit ​​structures 37 are disposed on the second cover 344.

[0149] For example, a portion of any snap-fit ​​structure 37 is disposed on the first cover 343, and another portion of any snap-fit ​​structure 37 is disposed on the second cover 344.

[0150] For example, at least two snap-fit ​​structures 37 are symmetrically distributed in the first direction.

[0151] Since the first cover 343 and the second cover 344 are connected by multiple snap-fit ​​structures 37, reliable assembly between the first cover 343 and the second cover 344 is achieved, which helps to improve installation efficiency.

[0152] Furthermore, since there are multiple snap-fit ​​structures 37, the connection strength between the first cover 343 and the second cover 344 can be improved, ensuring reliable protection for the connection terminal 332.

[0153] In some embodiments, at least one snap-fit ​​structure 37 is configured to be close to the first opening 342.

[0154] Since the seal 351 is located close to the first opening 342, by placing at least one snap-fit ​​structure 37 close to the first opening 342, the connection stability between the first cover 343 and the second cover 344 is improved at the position close to the first opening 342. This ensures a tight fit between the seal 351 and the wall of the sealing chamber 341 after assembly, as well as between the seal 351 and the wire harness 334, which helps to improve the sealing performance at the first opening 342.

[0155] In some embodiments, at least one snap-fit ​​structure 37 is located within the sealed chamber 341.

[0156] Since at least one snap-fit ​​structure 37 is located within the sealed chamber 341, reliable assembly between the first cover 343 and the second cover 344 is achieved, while reducing the risk of interference between the protective cover 34 and the structural components of the battery management system 20, which is beneficial to further improving the overall reliability of the energy storage device 1.

[0157] like Figure 10 As shown, in some embodiments, at least one of the first cover 343 and the second cover 344 has a relief groove 349 on the side opposite to the sealed chamber 341, and at least one snap-fit ​​structure 37 is located in the relief groove 349.

[0158] In other words, a clearance groove 349 is provided on the outer side of the first cover 343 and / or the second cover 344. When at least one snap-fit ​​structure 37 is located on the outer side, at least one snap-fit ​​structure 37 is located within the clearance groove 349, thereby achieving reliable assembly between the first cover 343 and the second cover 344 while reducing the risk of interference with the structural components of the battery management system 20 due to the exposed snap-fit ​​structure 37, which is beneficial to further improving the overall reliability of the energy storage device 1.

[0159] like Figure 9As shown, in some embodiments, at least one snap-fit ​​structure 37 includes a snap-fit ​​372 and a slot 374. The snap-fit ​​372 is disposed in one of the first cover 343 and the second cover 344. The slot 374 is disposed in the other of the first cover 343 and the second cover 344. The snap-fit ​​372 is inserted into the slot 374.

[0160] Since the buckle 372 is inserted into the slot 374, reliable assembly between the first cover 343 and the second cover 344 is achieved, which helps to further reduce the installation difficulty of the protective cover 34 and significantly improve the installation efficiency of the protective cover 34.

[0161] For example, the first cover 343 is provided with a buckle 372, and the second cover 344 is provided with a slot 374.

[0162] For example, the first cover 343 is provided with a slot 374, and the second cover 344 is provided with a buckle 372.

[0163] In some embodiments, the protective cover 34 includes a polypropylene protective cover.

[0164] In other words, the protective cover 34 is made of polypropylene. It is understandable that polypropylene is a rigid plastic, which can protect the connection terminal 332 and reduce the risk of short circuits, while facilitating the connection between the protective cover 34 and external components (battery management system 20), ensuring proper connection, and improving the installation stability and reliability of the protective cover 34.

[0165] like Figure 8 As shown, in some embodiments, the sealing cover assembly 35 has a gripping portion 39 on the side opposite to the sealing chamber 341.

[0166] In other words, a gripping part 39 is provided on the outside of the sealing cover assembly 35, which allows installers to assemble the sealing cover assembly 35 by operating the gripping part 39. This improves the ease of installation of the sealing cover assembly 35 and increases installation efficiency.

[0167] For example, the grip portion 39 includes a recess, i.e., a portion of the sealing cover assembly 35 is recessed toward the side where the sealing chamber 341 is located to form a recess.

[0168] For example, the grip portion 39 includes a protrusion, that is, a portion of the sealing cover assembly 35 extends outward from the side opposite to the sealing chamber 341 to form a protrusion.

[0169] For example, the gripping part 39 is disposed on the first cover 343.

[0170] For example, the gripping part 39 is disposed on the second cover 344.

[0171] For example, there are two gripping parts 39, one gripping part 39 is disposed on the first cover 343 and the other gripping part 39 is disposed on the second cover 344.

[0172] like Figure 5 , Figure 6 and Figure 12 As shown, in some embodiments, the end of the sealing cover assembly 35 away from the wiring harness 334 includes a connector 38. The connector 38 is used to connect to an external component. The connector 38 includes a second opening 382. The second opening 382 communicates with the sealing chamber 341. The connection terminal 332 is electrically connected to the external component through the second opening 382.

[0173] In other words, the sealing cover assembly 35 has a plug-in portion 38 at its head and a sealing element 351 at its tail. The plug-in portion 38 allows the sealing cover assembly 35 to be plugged into an external component (battery management system 20), which improves the reliability of the electrical connection between the connection terminal 332 and the external component. Simultaneously, in the event of thermal runaway in the battery cell assembly 31, it prevents high-temperature electrolyte vapor from entering the sealed chamber 341, reducing the risk of short circuits and improving the reliability of low-voltage control.

[0174] For example, the first cover 343 includes a first insertion portion, and the second cover 344 includes a second insertion portion. When the first cover 343 and the second cover 344 are connected, the first insertion portion and the second insertion portion form a second opening 382.

[0175] For example, the external component may be the battery management system 20.

[0176] For example, the battery management system 20 includes a circuit board that is electrically connected to the connection terminal 332.

[0177] The following describes a specific embodiment of this application.

[0178] The CCS protective cover body (sealing cover assembly 35) is mainly made of PP (Polypropylene) material and consists of a shell (protective cover 34) and a sealing ring (sealant 351). The sealing ring at the rear mates with the wiring harness 334 to achieve a sealing effect. This reduces the inconvenience and incomplete connection issues associated with conventional soft-shell protective covers.

[0179] After the protective cover (sealing cover assembly 35) is assembled, the sealing ring is compressed and contacts the wiring harness 334. When the protective cover (sealing cover assembly 35) is inserted into the female connector (external component), a sealed cavity (sealing chamber 341) is formed between the shells to prevent high-temperature electrolyte vapor from entering the CCS terminal (connection terminal 332) and causing a short circuit after thermal runaway of the battery cell (battery cell assembly 31), thereby achieving the sealing effect.

[0180] With the existing structure, the protective cover (sealing cover assembly 35) of the CCS terminal can achieve self-sealing, facilitating personnel assembly and eliminating the need for additional sealing structures such as tape. The sealing gasket (sealant 351) and the protective cover 34 are supplied as a single piece, achieving a sealing effect upon installation and preventing incomplete sealing, thus greatly improving installation efficiency. The sealing structure is stable and can have a service life of at least 25 years. The sealing ring (sealant 351) needs to be heat-resistant to prevent electrolyte vapor from seeping in.

[0181] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.

[0182] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0183] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0184] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized in that, include: Battery cell assembly, used to receive or provide electrical energy; The busbar assembly is electrically connected to the battery cell assembly; A connector assembly, the connector assembly including a connection terminal and a wire harness, a first end of the wire harness being electrically connected to the bus assembly, and a second end of the wire harness being electrically connected to the connection terminal; A sealing cover assembly having a sealing chamber, wherein the connecting terminal is located within the sealing chamber.

2. The battery device according to claim 1, characterized in that, The sealing cover assembly includes: A protective cover, wherein the protective cover is provided with the sealed chamber; A sealing element is disposed between the wire harness and the cavity wall of the sealed chamber.

3. The battery device according to claim 2, characterized in that, The seal is connected to the wall of the sealed chamber.

4. The battery device according to claim 3, characterized in that, The battery device also includes: An adhesive component is used to connect the sealing element to the cavity wall of the sealing chamber.

5. The battery device according to claim 2, characterized in that, The side of the seal near the wire harness abuts against the outer wall of the wire harness.

6. The battery device according to claim 2, characterized in that, The cross-sectional area of ​​the side of the seal closest to the wire harness in a first direction is smaller than the cross-sectional area of ​​the wire harness in the first direction.

7. The battery device according to claim 2, characterized in that, The seal includes a heat-resistant component; and / or the seal includes a sealing ring.

8. The battery device according to claim 2, characterized in that, The protective cover is also provided with a first opening, which communicates with the sealed chamber, and the second end of the wire harness extends into the sealed chamber through the first opening; The seal is configured to be close to the first opening.

9. The battery device according to claim 8, characterized in that, The protective shield includes: First cover; The second cover is connected to the first cover and together with the first cover, forms the sealed cavity and the first opening.

10. The battery device according to claim 9, characterized in that, The sealing element includes: A first sealing portion is provided on the first cover, and the first sealing portion includes a first recess. A second sealing portion is provided on the second cover. The second sealing portion includes a second recess, and the second recess and the first recess form an opening. The wire harness is located inside the opening.

11. The battery device according to claim 10, characterized in that, The cross-sectional area of ​​the second recess in the first direction is greater than the cross-sectional area of ​​the first recess in the first direction.

12. The battery device according to claim 9, characterized in that, The first cover is provided with a first sealing groove, which is located on the outside of the sealing chamber along a first direction; The second cover is provided with a first sealing edge, at least a portion of which is inserted into the first sealing groove and abuts against the groove wall of the first sealing groove.

13. The battery device according to claim 12, characterized in that, The second cover is also provided with a second sealing groove. Along the first direction, at least a portion of the second sealing groove is located on the side of the first sealing groove away from the sealing chamber. The side wall of the first sealing edge away from the sealing chamber constitutes a portion of the groove wall of the second sealing groove. The first cover is also provided with a second sealing edge. The side wall of the second sealing edge near the sealing chamber forms part of the groove wall of the first sealing groove, and at least part of the second sealing edge is inserted into the second sealing groove.

14. The battery device according to claim 9, characterized in that, The battery device also includes: Multiple snap-fit ​​structures are provided in at least one of the first cover and the second cover, and the first cover and the second cover are connected by the multiple snap-fit ​​structures.

15. The battery device according to claim 14, characterized in that, At least one of the snap-fit ​​structures is configured to be close to the first opening.

16. The battery device according to claim 14, characterized in that, At least one of the snap-fit ​​structures is located within the sealed cavity.

17. The battery device according to claim 14, characterized in that, At least one of the first cover and the second cover has a clearance groove on the side away from the sealed cavity, and at least one of the snap-fit ​​structures is located in the clearance groove.

18. The battery device according to claim 14, characterized in that, At least one of the snap-fit ​​structures includes: A buckle is provided on one of the first cover and the second cover; A slot is provided in the other of the first cover and the second cover, and the buckle is inserted into the slot.

19. The battery device according to any one of claims 2 to 18, characterized in that, The protective cover includes a polypropylene protective cover.

20. The battery device according to any one of claims 1 to 18, characterized in that, The sealing cover assembly has a gripping part on the side opposite to the sealing chamber.

21. The battery device according to any one of claims 1 to 18, characterized in that, The end of the sealing cover assembly away from the wiring harness includes a plug-in portion for connecting to an external component; The plug-in portion includes a second opening, which communicates with the sealed chamber, and the connection terminal is electrically connected to the external component through the second opening.

22. An energy storage device, characterized in that, include: The battery device as described in any one of claims 1 to 21; The battery management system is electrically connected to the connection terminal.

23. An electrical appliance, characterized in that, include: The battery device as claimed in any one of claims 1 to 21.

24. A charging network, characterized in that, include: The battery device as described in any one of claims 1 to 21; or The energy storage device as described in claim 22.

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