Battery assembly and electric device

Abstract

The embodiment of the application provides a battery assembly and an electric equipment, and relates to the field of 12V lithium battery technology. The battery assembly provided by the application comprises a first shell, a battery cell module and a second shell, wherein the battery cell module is arranged in the first shell; the battery cell module is provided with a connecting piece, and the battery cell module can be electrically connected with an external circuit through the connecting piece; the second shell is provided with a clearance; a first end of the connecting piece is electrically connected with the battery cell module in the accommodating cavity, and a second end of the connecting piece can extend to the outside of the accommodating cavity through the clearance. Through the above arrangement mode, the battery cell module can be directly connected with the external circuit through the connecting piece, the mounting structure specially used for mounting the battery cell module is avoided to be arranged on the first shell or the second shell, the structure of the first shell and the second shell is simplified, the use of other connecting parts is reduced, the structure of the battery assembly is further simplified, the high integration of the battery assembly is realized, and the material and production costs are further reduced.

Description

Technical Field

[0001] This application relates to 12V lithium battery technology, and more particularly to a battery assembly and electrical device. Background Technology

[0002] Driven by factors such as growing market demand, limitations of lead-acid batteries, the trend towards lightweight design, the expansion of the electric vehicle market, technological innovation and progress, environmental protection strategies, and the demand for renewable energy, 12V lithium battery technology continues to develop and the market continues to expand.

[0003] A typical 12V lithium battery includes a casing and a battery cell housed inside the casing. The casing has a mounting structure for installing the battery cell, and the casing also has terminals that can be electrically connected to the battery cell and external circuitry.

[0004] However, the installation structure and terminals on the casing of existing 12V lithium batteries increase the complexity of the structure, resulting in more connecting parts, lower integration, and thus higher manufacturing costs. Utility Model Content

[0005] In view of this, this application provides a battery assembly and electrical device, which aims to improve the integration level of 12V lithium batteries, simplify the structure, and reduce manufacturing costs.

[0006] To achieve the above objectives, this application provides a battery assembly and electrical device, which adopts the following technical solution:

[0007] In a first aspect, this application provides a battery assembly, comprising:

[0008] First shell;

[0009] A battery cell module is disposed in the first housing; the battery cell module has a connector, and the battery cell module can be electrically connected to an external circuit through the connector;

[0010] The second housing is connected to the first housing; the second housing and the first housing together form a cavity for accommodating the battery cell module.

[0011] The second housing is provided with a clearance opening; the first end of the connector is electrically connected to the battery cell module in the receiving cavity, and the second end of the connector can extend to the outside of the receiving cavity through the clearance opening.

[0012] In one possible implementation, the battery assembly provided in this application has a second housing located above the first housing, and the second housing is detachably connected to the first housing.

[0013] In one possible implementation, the battery assembly provided in this application has the clearance opening extending along the height direction of the first housing.

[0014] In one possible implementation, the battery assembly provided in this application includes a first connecting portion, a second connecting portion, and a third connecting portion arranged sequentially.

[0015] The first connecting portion is located inside the receiving cavity, the second connecting portion extends along the height direction of the first housing, and the third connecting portion is located outside the receiving cavity.

[0016] In one possible implementation, the battery assembly provided in this application has a first housing provided with a fixing member, which is fixed to the third connecting portion.

[0017] In one possible implementation, the battery assembly provided in this application has a second housing with a vent, the vent being connected to the clearance opening, and the receiving cavity being able to communicate with the outside of the receiving cavity through the vent.

[0018] In one possible implementation, the battery assembly provided in this application includes a second housing comprising a top plate and an extension, the extension being circumferentially disposed on the outside of the top plate;

[0019] The top plate abuts against the battery cell module, the first end of the extension is connected to the top plate, and the second end of the extension can be connected to the first housing.

[0020] In one possible implementation, the battery assembly provided in this application has the extension portion having the clearance opening;

[0021] The extension is also provided with a snap-fit ​​groove, and the first housing is provided with a snap-fit ​​connector, wherein the snap-fit ​​groove and the snap-fit ​​connector engage in a snap-fit ​​relationship.

[0022] In one possible implementation, the battery assembly provided in this application includes a cell module comprising electrically connected cylindrical cells and a battery management system, wherein the battery management system is located above the cylindrical cells.

[0023] The cylindrical cell is provided with a buffer layer, through which the cylindrical cell can contact the battery management system.

[0024] Secondly, this application provides an electrical device, characterized in that it includes a device body and at least one of the above-described battery components; the battery component is at least capable of supplying power to the device body.

[0025] The battery assembly and electrical device provided in this application include a first housing, a cell module, and a second housing. The cell module is disposed in the first housing. The cell module has a connector, allowing it to be electrically connected to an external circuit via the connector. The second housing is connected to the first housing. The second housing and the first housing together form a cavity for accommodating the cell module. The second housing has a clearance opening. The first end of the connector is electrically connected to the cell module within the cavity, and the second end of the connector extends to the outside of the cavity via the clearance opening. Through this arrangement, the cell module is electrically connected to an external circuit via the connector. One end of the connector is connected to the cell module, and the other end passes through the clearance opening to connect to the external circuit. This allows the cell module to be directly connected to the external circuit via the connector, avoiding the need for a dedicated mounting structure for the cell module on the first or second housing. This simplifies the structure of the first and second housings, reduces the use of other connecting components, and thus simplifies the structure of the battery assembly described in this application. This achieves a high degree of integration of the battery assembly, thereby reducing material and production costs.

[0026] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the technical solutions provided by this application, other technical features contained in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0027] The specific embodiments of this application are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustration and explanation of this application, and this application is not limited to the specific embodiments described below.

[0028] Figure 1 This is a schematic diagram of the structure of the battery assembly provided in this application;

[0029] Figure 2 for Figure 1 A schematic diagram of the structure in which the first and second shells are separated;

[0030] Figure 3 This is a schematic diagram of the exploded structure of the battery assembly provided in this application.

[0031] Explanation of reference numerals in the attached figures:

[0032] 10. Receiving cavity; 100. First housing; 110. Snap-fit ​​connector; 200. Second housing; 201. Clearance opening; 202. Vent; 210. Top plate; 220. Extension; 221. Snap-fit ​​groove; 300. Cell module; 310. Cylindrical cell; 320. Battery management system; 330. Buffer layer; 400. Connector; 410. First connecting part; 420. Second connecting part; 430. Third connecting part; 500. Structural rib; 600. Fixing member; 700. Connecting seat.

[0033] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0035] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] In the description of the embodiments of this application, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0037] In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise specified precisely.

[0038] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0039] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0040] New energy vehicles, as the most important part of the development plan for emerging industries, have received widespread attention from all sectors of society. For a long time, fuel vehicles will still dominate the market. The development of 12V start-stop and 48V start-stop systems in automobiles is a hot research direction for reducing the average fuel consumption of major automakers.

[0041] In related technologies, 48V start-stop systems have been installed and used in many models. However, since most electrical components in vehicles use 12V, the system still needs voltage conversion or a 12V battery. For a certain period of time, the 12V battery cannot be replaced.

[0042] In existing technologies, 12V batteries typically include 12V lead-acid batteries and 12V lithium batteries. While traditional 12V lead-acid batteries have seen significant improvements in structural design and raw material usage, their inherent limitations remain substantial. 12V lead-acid batteries suffer from high failure rates, low energy density, and short lifespans, especially under improper charge / discharge management, which can drastically shorten their lifespan. Furthermore, lead-acid batteries present environmental problems, containing heavy metals and other harmful substances that do not meet modern environmental regulations.

[0043] With the development of technology and the improvement of living standards, people's demand for automotive electronic devices and comfort features is constantly increasing, placing higher demands on reliable power systems. Meanwhile, lightweight design is one of the important trends in modern automotive manufacturing, aiming to improve fuel efficiency and the driving range of electric vehicles. In this regard, 12V lithium batteries are lighter than traditional lead-acid batteries, helping to reduce the overall weight of the vehicle, thereby improving fuel efficiency or extending the driving range of electric vehicles.

[0044] Driven by factors such as growing market demand, limitations of lead-acid batteries, the trend towards lightweight design, the expansion of the electric vehicle market, technological innovation and progress, environmental regulations, and the demand for renewable energy, 12V lithium battery technology is continuously developing and its market share is constantly expanding.

[0045] A typical 12V lithium battery consists of a casing and battery cells housed within it. The casing contains mounting structures for the cells, and also features terminals that electrically connect to the cells and external circuitry. The addition of mounting structures and terminals to the casing in existing 12V lithium batteries increases structural complexity, resulting in more connecting components. For example, traditional installation methods require numerous bolts, leading to low integration and increased manufacturing costs. The cost of a 12V lithium battery is approximately 3 to 4 times that of a lead-acid battery, resulting in a lower cost-performance ratio for 12V lithium battery products.

[0046] To address the aforementioned technical problems, this application provides a battery assembly and an electrical device. In this solution, the battery assembly includes a first housing, a cell module, and a second housing. The cell module is disposed within the first housing. The cell module has a connector, allowing it to be electrically connected to an external circuit via the connector. The second housing is connected to the first housing. The second housing and the first housing together form a cavity for accommodating the cell module. The second housing has a clearance opening. The first end of the connector is electrically connected to the cell module within the cavity, and the second end of the connector extends to the outside of the cavity through the clearance opening. With the above-described configuration, the cell module is electrically connected to the external circuit via a connector. One end of the connector is connected to the cell module, and the other end has a clearance opening for connection to the external circuit. This allows the cell module to be directly connected to the external circuit via the connector, avoiding the need for a dedicated mounting structure for the cell module on the first or second housing. This simplifies the structure of the first and second housings, reduces the use of other connecting components, and further simplifies the structure of the battery assembly involved in this application embodiment. This achieves a high degree of integration of the battery assembly, thereby reducing material and production costs.

[0047] It should be noted that, Figures 1 to 3 The diagram shows a simplified representation of the components in the battery pack and electrical device. The specific structures of the remaining components in the battery pack and electrical device are not limited to these examples. Figures 1 to 3 of examples.

[0048] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0049] Reference Figure 1 , Figure 2 and Figure 3As shown in the embodiment of this application, a battery assembly is provided that can at least provide electrical energy, including a first housing 100, a cell module 300, and a second housing 200.

[0050] The battery cell module 300 is disposed in the first housing 100. The battery cell module 300 has a connector 400, and the battery cell module 300 can be electrically connected to an external circuit through the connector 400.

[0051] The second housing 200 is connected to the first housing 100; the second housing 200 and the first housing 100 together form a receiving cavity 10 for accommodating the battery cell module 300.

[0052] The second housing 200 is provided with a clearance opening 201; the first end of the connector 400 is electrically connected to the battery cell module 300 in the receiving cavity 10, and the second end of the connector 400 can extend to the outside of the receiving cavity 10 through the clearance opening 201.

[0053] With the above-described configuration, the cell module 300 is electrically connected to an external circuit via the connector 400. One end of the connector 400 is electrically connected to the cell module 300, and the other end is provided with a clearance opening 201 for electrical connection to the external circuit. This allows the cell module 300 to be directly electrically connected to the external circuit via the connector 400, avoiding the need for a dedicated mounting structure for the cell module 300 on the first housing 100 or the second housing 200. Compared to traditional configurations, this simplifies the structure of the first housing 100 and the second housing 200, eliminates the need for mounting structures, reduces the use of other connecting components, and thus simplifies the structure of the battery assembly involved in this embodiment, achieving a high degree of integration of the battery assembly and reducing material and production costs.

[0054] In addition, the first housing 100 or the second housing 200 does not require an installation structure, which means that the first housing 100 or the second housing 200 can achieve a simpler structure, thereby reducing the space occupied by the first housing 100 and the second housing 200 and making the envelope dimension of the battery assembly smaller.

[0055] In one possible implementation, the second housing 200 is located above the first housing 100, and the second housing 200 is detachably connected to the first housing 100. In the above embodiment, the separate design of the first housing 100 and the second housing 200 facilitates easier operation of the cell module 300 during assembly and maintenance, allowing for the assembly and disassembly of the battery assembly without complex tools and procedures. When the cell module 300 or the connector 400 malfunctions, repair and replacement can be performed more quickly and conveniently, reducing maintenance costs and downtime, and improving the reliability and availability of the equipment.

[0056] In one possible implementation, in order to improve the structural strength of the first housing 100 and the second housing 200, structural ribs 500 are provided on the outer side walls of the first housing 100 and the second housing 200. The shape of the structural ribs 500 is not limited in this embodiment.

[0057] In one possible implementation, the battery cell module 300 can be directly bonded to the receiving cavity 10 using adhesive or foam adhesive, which can further reduce the use of connecting parts and structural components, thereby improving the assembly efficiency of the battery cell module 300.

[0058] In one possible implementation, the battery module has a length of 170mm-180mm, a width of 100mm-110mm, and a height of 110mm-120mm. Specifically, in this embodiment, the battery module has dimensions of 174mm*102.5mm*113.4mm. The battery module has a capacity of 12Ah-16Ah. The voltage platform is 12.85V.

[0059] In one possible implementation, when the second housing 200 is not fixed to the first housing 100, the second housing 200 can move closer to or further away from the first housing 100 along the height direction of the first housing 100.

[0060] The clearance opening 201 extends along the height direction of the first housing 100. When the second housing 200 approaches the first housing 100 along the height direction of the first housing 100, at least a portion of the connector 400 slides within the clearance opening 201 along the height direction of the first housing 100.

[0061] In the above embodiment, the clearance opening 201 extends along the height direction of the first housing 100, and at least a portion of the connector 400 slides within the clearance opening 201 along the height of the first housing 100. This allows the connector 400 to slide smoothly within the clearance opening 201 during the assembly of the first housing 100 and the second housing 200, providing a certain degree of restraint on the movement of the second housing 200 during assembly. This enables precise positioning and rapid assembly of the battery cell module 300, reducing errors and adjustment time during assembly, and improving production efficiency and product quality consistency. Furthermore, the connector 400, located within the clearance opening 201, provides a certain degree of restraint on the second housing 200, ensuring the stability and reliability of the connection between the connector 400 and the external circuit, while also ensuring the connection stability between the second housing 200 and the first housing 100.

[0062] In one possible implementation, the connector 400 includes a first connecting portion 410, a second connecting portion 420, and a third connecting portion 430 arranged sequentially.

[0063] The first connecting part 410 is located inside the receiving cavity 10, the second connecting part 420 extends along the height direction of the first housing 100, and the third connecting part 430 is located outside the receiving cavity 10.

[0064] It should be noted that the connector 400 can be a copper busbar or an aluminum busbar, and its main function is to provide electrical connection between the battery cell module 300 and the external circuit. There are usually two connectors 400. These two connectors 400 can serve as positive and negative terminals for charging the battery cell module 300, and also as positive and negative terminals for outputting electrical energy from the battery cell module 300 to the external circuit. This application does not limit the specific material or number of connectors 400.

[0065] In the above embodiment, the first connecting part 410 is located within the receiving cavity 10 and is connected to the cell module 300. Specifically, the first connecting part 410 is welded to the cell module 300. By welding the first connecting part 410 to the cell module 300, a quick connection between the connector 400 and the cell module 300 can be achieved, reducing the need for connecting parts such as bolts or clips, further reducing the use of parts, and improving assembly efficiency. The second connecting part 420 extends along the height direction of the first housing 100. The second connecting part 420 occupies the space of the first housing 100 in its height direction, optimizing space utilization. In contrast to other extensions, such as the second connecting part 420 extending horizontally, it avoids occupying other space, which is beneficial for the integration and miniaturization design of the battery assembly. Furthermore, this design makes the connector 400 flexible in the height direction of the housing, adaptable to different installation positions and space requirements, and also facilitates the positioning and adjustment of the connector 400 during assembly.

[0066] The third connection part 430 is located on the outside of the receiving cavity 10, providing a connection point between the connector 400 and the external circuitry, avoiding interference with other parts. The segmented connector 400 structure facilitates subsequent upgrades and improvements to the battery assembly. If it is necessary to optimize the performance of the connector 400 or add new functions, different parts of the connector 400 can be improved and adjusted separately without affecting the overall structure and performance of the battery assembly. This scalability allows the battery assembly to better meet market demands and technological development requirements.

[0067] In one possible implementation, in the vertical direction, the second connecting portion 420 can be completely located within the relief opening 201, which provides a certain degree of protection for the second connecting portion 420, preventing external impurities from scratching the second connecting portion 420.

[0068] The plane on the side of the second connecting part 420 that is away from the first connecting part 410 can be coplanar with the plane on the side edge of the relief opening 201 that is away from the receiving cavity 10. This makes the outer appearance of the battery assembly smoother from a visual perspective, which helps to improve the appearance of the battery assembly.

[0069] In one possible implementation, the first housing 100 is provided with a fastener 600, which is fixed to the third connecting portion 430.

[0070] In a specific implementation, a fastener 600 is provided on the outer side of the first housing 100. The fastener 600 may be a boss-shaped connecting ear integrally formed with the first housing 100, or it may be a connecting ear welded to the outer side of the first housing 100. The specific structure of the fastener 600 is not limited in the embodiments of this application.

[0071] In the above embodiment, the fastener 600 provides support and fixation for the third connecting part 430. The connection between the third connecting part 430 and the fastener 600 can be a bolted connection. The fastener 600, as an additional support and connecting element, enhances the connection strength between the connecting part 400 and the first housing 100. This effectively prevents loosening or displacement between the third connecting part 430 and the housing, ensuring that the electrical connection between the cell module 300 and the external circuit remains stable. The fastener 600 also provides an accurate positioning reference for the installation of the third connecting part 430. When assembling the battery assembly, operators can quickly and accurately install the third connecting part 430 into the predetermined position using the fastener 600, reducing adjustment time and errors during assembly. This helps improve assembly efficiency, ensures consistent assembly quality for each battery assembly, and thus improves the overall quality and reliability of the product.

[0072] In one possible implementation, refer to Figure 2 and Figure 3 As shown, the second housing 200 is provided with a vent 202, which is connected to the relief port 201, and the receiving cavity 10 can be connected to the outside of the receiving cavity 10 through the vent 202.

[0073] In the above embodiment, by providing a vent 202 on the first housing 100, the receiving cavity 10 can be connected to the outside. It is understood that when the cell module 300 inside the receiving cavity 10 is working, it will generate some electric heat, which will increase the air pressure inside the receiving cavity 10. Or, when the cell module 300 experiences thermal runaway or other sudden events, the air pressure inside the receiving cavity 10 will increase. By providing a vent 202, the receiving cavity 10 can be quickly depressurized, so that the air pressure inside and outside the receiving cavity 10 can be kept in balance. At the same time, air convection heat exchange between the inside and outside of the receiving cavity 10 can be realized, avoiding dangerous accidents such as fire and explosion of the cell module 300, and improving the safety of the battery assembly.

[0074] Furthermore, by connecting the vent 202 with the clearance port 201, both the clearance port 201 and the vent 202 can simultaneously achieve pressure relief and exhaust, improving the efficiency of pressure relief. Additionally, there is no need to create additional vents 202 at other locations on the second housing 200, reducing the impact on the structural integrity of the second housing 200. Of course, there can be one or more vents 202; this embodiment does not limit the number of vents 202. Furthermore, the outline of the vent 202 can be circular, semi-circular, or square. In this embodiment, the vent 202 is set to a semi-circular outline, which reduces stress concentration in the second housing 200 when the vent 202 is located, preventing defects such as cracks from forming in the second housing 200.

[0075] In one possible implementation, the second housing 200 includes a top plate 210 and an extension 220, the extension 220 being circumferentially disposed on the outside of the top plate 210.

[0076] The top plate 210 abuts against the battery cell module 300, the first end of the extension 220 is connected to the top plate 210, and the second end of the extension 220 can be connected to the first housing 100.

[0077] In the above embodiment, by providing a top plate 210 and an extension 220, the extension 220 extends toward the first housing 100. The extension 220 and the top plate 210 together form a cavity for limiting the top of the cell module 300. This can surround and support the cell module 300 from multiple directions, improve the stability of the cell module 300, effectively prevent external dust, moisture, foreign objects, etc. from entering the battery, improve the sealing and protection level, and help extend the service life of the battery assembly. Furthermore, the top plate 210 abuts against the cell module 300, which can further improve the stability of the cell module 300 and prevent the cell module 300 from shaking or moving within the receiving cavity 10.

[0078] In one possible implementation, the extension 220 is provided with a clearance opening 201.

[0079] The extension 220 is also provided with a snap-fit ​​groove 221, and the first housing 100 is provided with a snap-fit ​​connector 110, with the snap-fit ​​groove 221 engaging with the snap-fit ​​connector 110.

[0080] In the above embodiment, the clearance opening 201 is provided on the extension 220, which can prevent dust from falling from top to bottom into the receiving cavity 10 during daily use, thus helping to improve the cleanliness of the battery assembly. Furthermore, a vent 202 is provided on the extension 220. By providing a snap-fit ​​groove 221 and a snap-fit ​​connector 110, the snap-fit ​​groove 221 engages with the snap-fit ​​connector 110, providing a simple and efficient way to assemble the first housing 100 and the second housing 200 in the battery assembly. During installation, the operator only needs to align the snap-fit ​​groove 221 with the snap-fit ​​connector 110 and insert it to quickly complete the connection between the second housing 200 and the extension 220 (and the first housing 100), without the need for complex tools or cumbersome operating procedures. This can significantly shorten the battery production cycle, improve production efficiency, and reduce production costs, especially suitable for large-scale production. In addition, the snap-fit ​​between the snap-fit ​​connector 110 and the snap-fit ​​groove 221 enables precise positioning of the second housing 200 and the first housing 100, thereby improving the stability of the battery assembly.

[0081] In one possible implementation, the cell module 300 includes an electrically connected cylindrical cell 310 and a battery management system 320, with the battery management system 320 located above the cylindrical cell 310.

[0082] The cylindrical cell 310 is provided with a buffer layer 330, through which the cylindrical cell 310 can contact the battery management system 320.

[0083] In the above embodiments, the number of cylindrical cells 310 can be multiple. In this application, four cylindrical cells 310 are provided and arranged in a matrix, forming a 1P4S structure. The positive and negative electrodes of the four cylindrical cells 310 are connected in series. Specifically, each cylindrical cell 310 is connected to the others via aluminum foil, and the outer walls of two adjacent cylindrical cells 310 abut against each other. In the height direction of the battery assembly, the length direction of the cylindrical cells 310 is perpendicular to the height direction of the battery assembly. By setting the cylindrical cells 310, the aluminum foil can make full use of the space of the cylindrical cells 310 in the length direction, improving space utilization. Each cylindrical cell 310 is directly bonded with adhesive or foam adhesive, simplifying the connection structure of the cylindrical cells 310 and improving the assembly efficiency.

[0084] In one specific implementation, the cylindrical cell 310 is electrically connected to the battery management system 320 via a connecting copper busbar. One end of the connecting copper busbar is welded to the battery management system 320, and the other end is welded to the electrode of the cylindrical cell 310. By using a welding method with the connecting copper busbar, the connection efficiency between the battery management system 320 and the cylindrical cell 310 can be further improved, the number of connecting parts between the battery management system 320 and the connecting copper busbar can be reduced, the structure of the connector 400 can be simplified, and costs can be reduced. A buffer layer 330 is provided between the cylindrical cell 310 and the battery management system 320, which can effectively buffer vibration and impact during daily use or when subjected to external impacts, reducing the risk of damage to the cylindrical cell 310, such as preventing cell casing cracking and internal short circuits, thereby improving the overall safety of the battery. The buffer layer 330 can be made of a material with certain thermal conductivity, which helps to better conduct the heat generated by the cylindrical cell 310 during use, preventing heat accumulation in local areas of the cell, ensuring temperature uniformity of the cell, and thus improving battery performance and lifespan.

[0085] The manufacturing process of cylindrical cells 310 is relatively simple and mature, and it has a low production cost. Cylindrical cells 310 have good structural strength and can withstand external pressure and impact better than cells of other shapes (such as square cells).

[0086] In one possible implementation, the battery management system 320 may integrate a current sensor, an AFE voltage acquisition module, a MOS switch, a temperature sensor, a communication module, etc., to acquire the voltage, temperature, and current of the battery cells and control the switching on and off of the MOS. This application does not limit the specific structure of the battery management system 320.

[0087] In one possible implementation, both the first housing 100 and the second housing 200 are made of injection-molded ABS+PA66 material, which can improve the structural strength of the first housing 100 and the second housing 200, thereby improving the safety of the battery assembly and extending its service life. The first housing 100 is provided with a plurality of connecting seats 700, and the first housing 100 is bolted to the vehicle through the connecting seats 700 to realize the detachable connection between the battery assembly and the vehicle.

[0088] To optimize the exhaust path of the cylindrical cell 310, at least one cylindrical cell 310 is positioned opposite the vent 202.

[0089] In one possible implementation, this application provides an electrical device, including a device body and the aforementioned battery assembly, wherein the battery assembly is at least capable of supplying power to the device body. Here, the device body can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. This application does not limit the specific structure of the device body.

[0090] The implementation principle of a battery assembly and electrical device according to an embodiment of this application is as follows: The battery assembly includes a first housing 100, a cell module 300, and a second housing 200, wherein the cell module 300 is disposed in the first housing 100; the cell module 300 has a connector 400, and the cell module 300 can be electrically connected to an external circuit through the connector 400; the second housing 200 is connected to the first housing 100; the second housing 200 and the first housing 100 together form a receiving cavity 10 for accommodating the cell module 300. The second housing 200 is provided with a clearance opening 201; the first end of the connector 400 is electrically connected to the cell module 300 in the receiving cavity 10, and the second end of the connector 400 can extend to the outside of the receiving cavity 10 through the clearance opening 201. With the above configuration, the cell module 300 is electrically connected to the external circuit via the connector 400. One end of the connector 400 is connected to the cell module 300, and the other end is provided with a clearance opening 201 to connect to the external circuit. This allows the cell module 300 to be directly connected to the external circuit via the connector 400, avoiding the need for a dedicated mounting structure for the cell module 300 on the first housing 100 or the second housing 200. This simplifies the structure of the first housing 100 and the second housing 200, reduces the use of other connecting components, and thus simplifies the structure of the battery assembly involved in this application embodiment, achieving a high degree of integration of the battery assembly and reducing material and production costs.

[0091] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein.

[0092] The embodiments in this application are intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed in this application. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this application are indicated by the claims.

[0093] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A battery assembly, characterized in that, include: First shell; A battery cell module, wherein the battery cell module is disposed in the first housing; The battery cell module has a connector, and the battery cell module can be electrically connected to an external circuit through the connector; The second housing is connected to the first housing; the second housing and the first housing together form a cavity for accommodating the battery cell module. The second housing is provided with a clearance opening; the first end of the connector is electrically connected to the battery cell module in the receiving cavity, and the second end of the connector can extend to the outside of the receiving cavity through the clearance opening.

2. The battery assembly according to claim 1, characterized in that, The second housing is located above the first housing, and the second housing is detachably connected to the first housing.

3. The battery assembly according to claim 2, characterized in that, The clearance opening extends along the height direction of the first housing.

4. The battery assembly according to claim 3, characterized in that, The connector includes a first connecting part, a second connecting part, and a third connecting part arranged sequentially. The first connecting portion is located inside the receiving cavity, the second connecting portion extends along the height direction of the first housing, and the third connecting portion is located outside the receiving cavity.

5. The battery assembly according to claim 4, characterized in that, The first housing is provided with a fixing member, which is fixed to the third connecting part.

6. The battery assembly according to claim 1, characterized in that, The second housing is provided with a vent, which is connected to the clearance port, and the receiving cavity can be connected to the outside of the receiving cavity through the vent.

7. The battery assembly according to any one of claims 1-6, characterized in that, The second housing includes a top plate and an extension, the extension being circumferentially disposed on the outside of the top plate; The top plate abuts against the battery cell module, the first end of the extension is connected to the top plate, and the second end of the extension can be connected to the first housing.

8. The battery assembly according to claim 7, characterized in that, The extension is provided with the clearance opening; The extension is also provided with a snap-fit ​​groove, and the first housing is provided with a snap-fit ​​connector, wherein the snap-fit ​​groove and the snap-fit ​​connector engage in a snap-fit ​​relationship.

9. The battery assembly according to any one of claims 1-6, characterized in that, The battery cell module includes a cylindrical battery cell and a battery management system that are electrically connected, with the battery management system located above the cylindrical battery cell; The cylindrical cell is provided with a buffer layer, through which the cylindrical cell can contact the battery management system.

10. An electrical appliance, characterized in that, It includes a device body and at least one battery assembly as described in any one of claims 1-9; the battery assembly is at least capable of powering the device body.

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