Battery apparatus and electric apparatus

Abstract

A battery apparatus and an electric apparatus. The battery apparatus comprises: a case; a battery cell assembly comprising: casing assemblies each having an accommodating cavity and comprising a partition plate provided in the corresponding accommodating cavity, wherein the partition plate partitions the accommodating cavity into a first chamber and a second chamber which are communicated with each other; and pouch battery cells provided in the first chambers and bonded to the case, wherein the second chambers are configured to accommodate a medium discharged from the first chambers. In the technical solution, when thermal runaway occurs in a certain pouch battery cell, a discharged high-temperature and high-pressure medium can enter the second chambers, thereby reducing the risk of accumulation in the first chambers and further reducing the possibility of thermal propagation; and the casing assemblies can further reduce the range of movement and deformation of each pouch battery cell, and improve stability of positions of the pouch battery cells within the battery cell assembly, thereby reducing the probability of short circuit or electrical leakage caused by movement of the pouch battery cells.

Description

Battery devices and electrical appliances Technical Field

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

[0002] Currently, most new energy vehicles use power batteries as energy storage and power devices, and power batteries are also found in other types of vehicles. The reliability of power batteries has a significant impact on the vehicle's range and power performance. Therefore, improving battery reliability is a direction that needs to be focused on in the continuous improvement and innovation of batteries. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a battery device and an electrical device incorporating the battery device, which can improve the reliability of individual pouch cells, thereby enhancing the reliability of the battery device itself.

[0004] In a first aspect, embodiments of this application provide a battery device, comprising: a housing having a base plate for carrying a battery cell assembly; the battery cell assembly including a housing assembly and a pouch battery cell, the housing assembly having a receiving cavity, the housing assembly including a partition plate disposed in the receiving cavity, the partition plate dividing the receiving cavity into a first chamber and a second chamber that are interconnected; the pouch battery cell disposed in the first chamber; wherein the second chamber is configured to contain a medium discharged from the first chamber, and the pouch battery cell is adhered to the housing.

[0005] In the above technical solution, on the one hand, the partition plate divides the housing assembly's accommodating cavity into a first chamber and a second chamber that can communicate with each other. This allows the high-temperature, high-pressure medium emitted by a single pouch battery cell in the same accommodating cavity to quickly enter the second chamber when thermal runaway occurs, preventing it from accumulating in the first chamber. This reduces the risk of thermal spread between adjacent pouch battery cells in the same accommodating cavity. On the other hand, the housing assembly covers the pouch battery cells, and the second chamber collects the excrement, which can delay the spread of excrement to adjacent housing assemblies to a certain extent. This further reduces the risk of thermal spread between adjacent battery cell assemblies, thus effectively improving the reliability of the battery device.

[0006] In addition, the housing assembly can reduce the range of movement and deformation of each pouch cell. The pouch cells are bonded to the housing, which not only improves the assembly efficiency, but also improves the positional stability of the pouch cells within the battery cell assembly, reducing the probability of short circuits or leakage caused by the movement of the pouch cells. Furthermore, the housing assembly can also disperse external impact forces, reducing the risk of the pouch cells being subjected to excessive impact forces and extending the service life of the pouch cells.

[0007] In some embodiments, a first pressure relief zone is provided on the partition plate, and the first pressure relief zone is configured to connect the first chamber and the second chamber.

[0008] In the above technical solution, since a first pressure relief zone is provided on the partition plate, the first pressure relief zone can release the excessive pressure in the first chamber to the second chamber in a timely manner, reducing the risk of the housing assembly exploding or rupturing due to excessive internal pressure when the soft-pack battery cell thermally runs away, and improving the stability of the battery cell assembly structure.

[0009] In some embodiments, the first pressure relief zone includes a through hole disposed in the partition plate, the through hole connecting the first chamber and the second chamber.

[0010] In the above technical solution, since the first pressure relief zone is formed as a through hole that penetrates the partition plate, and the through hole connects the first chamber and the second chamber, the first pressure relief zone has a simple structure, is easy to process, and has stable and reliable pressure relief performance.

[0011] In some embodiments, the first pressure relief zone includes a weak portion disposed on the partition plate, the weak portion being configured to be destroyed under a preset pressure to connect the first chamber and the second chamber.

[0012] In the above technical solution, since the first pressure relief zone is formed in the weak part of the separator, it can achieve stable pressure relief when thermal runaway occurs. At the same time, there is no need to introduce additional pressure relief components. This not only reduces the number of components and assembly work, simplifies the manufacturing process of the pressure relief structure, and reduces costs, but also reduces the space occupied by the first pressure relief zone and improves the energy density of the battery cell module.

[0013] In some embodiments, the weak portion includes a groove provided on the partition plate, the groove being configured to tear under a preset pressure to connect the first chamber and the second chamber.

[0014] In the above technical solution, since the weak part can be a groove formed on the partition plate, the groove can guide the rupture direction of the first pressure relief zone when thermal runaway occurs. According to the setting position of the groove, the pressure relief position and pressure relief area after the first pressure relief zone ruptures can be flexibly controlled, thereby improving the pressure relief speed and efficiency.

[0015] In some embodiments, a first end of the partition plate is connected to the wall of the housing assembly, and a second end is spaced apart from the wall of the housing assembly to form a gap, the gap connecting the first chamber and the second chamber.

[0016] In the above technical solution, the first end of the partition plate is connected to the wall of the shell assembly, and the second end is spaced apart from the wall of the shell assembly to form a gap. In the event of thermal runaway, the high-temperature and high-pressure medium in the first chamber can flow to the second chamber through the gap. The pressure relief structure is simple, easy to process, and can achieve stable pressure relief.

[0017] In some embodiments, the partition includes a first plate and a second plate, which are disposed opposite to each other and are respectively connected to the wall of the housing assembly, and a gap is formed between them, which communicates the first chamber and the second chamber.

[0018] In the above technical solution, the partition plate includes a first plate and a second plate. The first plate and the second plate are arranged at intervals relative to each other and are respectively connected to the wall of the shell assembly. The gap formed between the two plates allows the high-temperature and high-pressure medium in the first chamber to flow to the second chamber in the event of thermal runaway. The pressure relief structure is simple to form, easy to process, and has stable and reliable pressure relief performance.

[0019] In some embodiments, the housing assembly further includes a first housing and a second housing, which together form a receiving cavity, and a partition plate is connected to the first housing and / or the second housing.

[0020] In the above technical solution, the housing assembly includes a first housing and a second housing, which together form a receiving cavity. The split housing structure facilitates the assembly of individual soft-pack battery cells without deforming the housing, thereby improving assembly accuracy and efficiency. At the same time, the partition plate is connected to the first housing and / or the second housing, which can reduce the processing difficulty, provide flexibility in the setting method, and improve processing efficiency.

[0021] In some embodiments, the battery cell assembly includes a plurality of pouch cell batteries, each pouch cell including two opposing first surfaces and two opposing second surfaces, the surface area of ​​the first surfaces being larger than that of the second surfaces; a first housing includes a first fixing portion and a second fixing portion, the first fixing portion and the second fixing portion being connected at an included angle; the first fixing portion covers at least a portion of the first surface along a first direction, and the second fixing portion covers the second surface of each pouch cell along a second direction; the second housing includes a third fixing portion, the third fixing portion being disposed on the side of the second fixing portion away from the first fixing portion, and covering at least a portion of the first surface along the first direction.

[0022] In the above technical solution, the first housing includes a first fixing part and a second fixing part. The first fixing part covers at least a portion of the first surface along a first direction, and the second fixing part covers the second surface of each pouch battery cell along a second direction. The second housing includes a third fixing part, which is disposed on the side of the second fixing part away from the first fixing part and covers at least a portion of the first surface along the first direction. The housing assembly as a whole presents a U-shaped structure, which enables the pouch battery cell to be stably maintained in the receiving space formed by the housing assembly, reducing the risk of displacement of the pouch battery cell. At the same time, the entire battery cell assembly has a simple and compact structure, which can reduce the risk of deformation of the receiving cavity when the battery cell assembly is subjected to external impact, and can also improve the energy density of the battery cell assembly.

[0023] In some embodiments, the first and second surfaces of any pouch cell are connected by a transition portion.

[0024] In the above technical solution, the first and second surfaces of any pouch cell are connected by a transition portion, which can increase the connection strength and reduce the risk of cracking of the pouch cell casing.

[0025] In some embodiments, the transition portion is an R-angle.

[0026] In the above technical solution, the transition part is an R-angle, which is beneficial to the processing and manufacturing of the soft-pack battery cell shell, improves the shell's crack resistance, and can improve the production efficiency of the soft-pack battery cell.

[0027] In some embodiments, a baffle structure is provided between the R-angles of any two adjacent pouch cell cells located in the same receiving cavity, and the baffle structure is provided at the bottom of the housing.

[0028] In the above technical solution, a baffle structure is provided between the R-corners of any two adjacent soft-pack battery cells in the same housing cavity. This can prevent glue from overflowing to the R-corners when the soft-pack battery cells are bonded to the housing, thereby reducing the risk of stress concentration at the R-corners of the soft-pack battery cells.

[0029] In some embodiments, the adhesive-blocking structure is an adhesive-blocking strip.

[0030] In the above technical solution, the adhesive-blocking structure is an adhesive-blocking strip, which can be directly glued to the bottom of the box. It has a simple structure, is easy to install, and has high reliability.

[0031] In some embodiments, the second fixing part is vertically connected to the first fixing part; the partition plate is vertically connected to the first fixing part and is spaced apart from the second fixing part along the second direction; the first fixing part, the second fixing part, the third fixing part and the partition plate together enclose the second chamber; the first fixing part, the partition plate and the third fixing part together enclose the first chamber.

[0032] In the above technical solution, the first fixing part, the second fixing part, the third fixing part and the partition plate together enclose the second chamber, and the first fixing part, the partition plate and the third fixing part together enclose the first chamber. The partition plate and the second fixing part are spaced apart along the second direction, which can not only divide the first receiving cavity and the second receiving cavity, but also eliminate the need for additional partitions in the second receiving cavity. This makes the structure of the housing assembly simpler, the processing efficiency higher, saves materials, reduces costs, and also reduces the size of the entire battery cell assembly along the second direction, thereby increasing the energy density of the battery cell assembly.

[0033] In some embodiments, the second housing further includes a fourth fixing part, the third fixing part and the fourth fixing part are connected at an angle; the fourth fixing part is disposed with the second fixing part and together cover the second surface along the second direction.

[0034] In the above technical solution, the second housing also includes a fourth fixing part. The third fixing part and the fourth fixing part are connected at an angle to form an L-shaped structure. The fourth fixing part and the second fixing part are connected and together cover the second surface of the soft-pack battery cell along the second direction, making the structure of the entire housing assembly more compact. The soft-pack battery cell in the cavity is not easy to be displaced. When subjected to external impact, the housing assembly can stably support the soft-pack battery cell and reduce the possibility of deformation of the soft-pack battery cell.

[0035] In some embodiments, the projections of the second fixing portion and the fourth fixing portion along the second direction at least partially overlap.

[0036] In the above technical solution, the projections of the second fixing part and the fourth fixing part along the second direction at least partially overlap, which can reduce the risk of foreign objects entering the first chamber through the second chamber and reduce the risk of short circuit or damage to the soft-pack battery cell.

[0037] In some embodiments, the second fixing part and the fourth fixing part are welded together on the side that is close to each other along the first direction.

[0038] In the above technical solution, the second fixing part and the fourth fixing part are welded together, which can make the housing assembly more compact, reduce the space occupied by the housing assembly, and prevent foreign objects from entering the second chamber, thereby reducing the risk of short circuit or damage to the soft-pack battery cell.

[0039] In some embodiments, the battery cell assembly includes a plurality of housing assemblies arranged sequentially along a first direction, and each housing assembly has a soft-pack battery cell disposed within its receiving cavity.

[0040] In the above technical solution, the battery cell assembly includes multiple housing assemblies arranged along the first direction. Each housing assembly contains a pouch battery cell, which helps to improve the assembly efficiency and assembly accuracy of the battery cell assembly. At the same time, the pouch battery cells in different cavities are separated by the housing assemblies, which can also reduce the risk of thermal runaway of the pouch battery cells spreading to adjacent cavities.

[0041] In some embodiments, at least two adjacent housing assemblies share a portion of the housing.

[0042] In the above technical solution, at least two adjacent housing components share a portion of the housing, which can significantly reduce the number of parts, save materials, reduce costs, and improve the assembly efficiency of battery cell components.

[0043] In some embodiments, a pouch cell includes two first surfaces disposed opposite each other along a first direction, and any two adjacent housing assemblies, wherein a portion of the first housing of one of the assemblies covering the first surface shares a housing with a portion of the second housing of the other of the assemblies covering the first surface.

[0044] In the above technical solution, the pouch battery cell includes a first surface arranged opposite to each other along a first direction. Two adjacent housing assemblies, wherein the portion of the first housing of one of them covering the first surface and the portion of the second housing of the other of it covering the first surface share a housing, can simplify the housing structure of the housing assembly, facilitate the processing and manufacturing of the housing assembly, improve processing efficiency, reduce processing costs, and also help reduce the thickness of the housing assembly between the pouch battery cells in two adjacent cavities, which helps reduce the space occupied by the battery cell assembly along the first direction, making the structure of the battery cell assembly more compact and helping to improve the energy density of the battery cell assembly.

[0045] In some embodiments, the battery cell assembly includes a plurality of pouch cell units and an adhesive. The pouch cell unit includes two first surfaces disposed opposite each other along a first direction. The first surfaces of the plurality of pouch cell units are connected to each other by the adhesive and to the housing assembly.

[0046] In the above technical solution, the battery cell assembly includes multiple pouch battery cells and an adhesive. The pouch battery includes two first surfaces arranged opposite each other along a first direction. The first surfaces of the multiple pouch battery cells and the housing assemblies corresponding to the first surfaces are connected to each other by the adhesive, which can improve the structural strength of the entire battery cell assembly. When subjected to external vibration and impact, the impact force can be dispersed to the entire battery cell assembly, making it less likely for individual pouch battery cells to deform and reducing the risk of battery cell assembly failure.

[0047] In some embodiments, the housing assembly is made of metal or plastic.

[0048] In the above technical solution, the shell assembly is made of metal or plastic, and its hardness is higher than that of the outer shell of the pouch battery cell. When subjected to external vibration and impact, the shell assembly can provide support and protection for the pouch battery cell, reducing the risk of deformation and damage to the pouch battery cell.

[0049] In some embodiments, the pouch cell is any one of a lithium iron phosphate cell, a ternary lithium cell, and a solid-state cell.

[0050] In the above technical solution, the soft-pack battery cell is set as any one of lithium iron phosphate battery cell, ternary battery cell, and solid-state battery cell, so that the soft-pack battery cell can be flexibly set as different types of battery cells according to the needs of the application scenario.

[0051] In some embodiments, the soft-pack battery cell is a lithium iron phosphate battery cell, and the ratio of the amount of positive active material, binder and conductive agent in the positive electrode material of the soft-pack battery cell is 96:(1-3):(1-3); the soft-pack battery cell is a ternary battery cell, and the ratio of the amount of the amount of positive active material, binder and conductive agent in the positive electrode material of the soft-pack battery cell is 96:(2-3):(1-2).

[0052] In the above technical solutions, when the pouch battery cell is a lithium iron phosphate battery cell, a high proportion of positive electrode active material means that more substances capable of electrochemical reactions can be accommodated within a limited electrode assembly. This is beneficial for increasing the capacity and energy density of the battery device, allowing the lithium iron phosphate battery cell to output higher power while maintaining a relatively small volume and weight, meeting the application scenarios with certain energy density requirements. Using the above-mentioned range for binder and conductive agent dosages can reduce the cost of auxiliary materials, thereby reducing the overall cost of the battery device. When the pouch battery cell is a ternary lithium battery cell, due to the relatively complex structure and surface properties of ternary materials, using the above-mentioned proportions of positive electrode active material, binder, and conductive agent helps ensure good adhesion between positive electrode active material particles and between the active material and the current collector. This improves the mechanical stability and integrity of the electrode assembly, reduces the risk of active material detachment and electrode pulverization during charging and discharging, and extends the cycle life of the battery device.

[0053] In some embodiments, the housing assembly includes a first opening communicating with a first chamber, and a reinforcing portion is provided near the first opening, the housing assembly being connected to a base plate via the reinforcing portion.

[0054] In the above technical solution, the housing assembly includes a first opening that communicates with a first chamber. A reinforcing part is provided near the first opening of the housing assembly. The housing assembly is connected to the base plate through the reinforcing part, which allows the battery cell assembly and the battery device housing to be connected as a whole. This can further improve the vibration and impact resistance of the soft-pack battery cell and reduce the risk of deformation and displacement of the soft-pack battery cell. At the same time, the reinforcing part can improve the strength of the housing assembly, making the housing assembly less prone to deformation and providing stable support for the soft-pack battery cell.

[0055] In some embodiments, the base plate is provided with a slot, and the reinforcement is inserted into the slot.

[0056] In the above technical solution, the base plate is provided with a slot, and the reinforcing part is inserted into the slot, which can improve the connection strength between the shell assembly and the bottom plate of the box. It is not easy to separate from the box when subjected to vibration and impact, and the impact force can be distributed to the entire box, so that the stress is even and the shell assembly is not easily deformed. At the same time, the reinforcing part is inserted into the slot, which can reduce the size of the shell assembly along the second direction, which is conducive to saving box space and improving space utilization.

[0057] In some embodiments, the battery device further includes a thermally conductive structural adhesive, wherein the side of the pouch cell closest to the first opening is bonded to the base plate by the thermally conductive structural adhesive.

[0058] In the above technical solution, the battery device includes a thermally conductive structural adhesive. The side of the soft-pack battery cell near the first opening is bonded to the base plate with the thermally conductive structural adhesive. Based on the reinforcement of the housing assembly being fixed to the base plate through a slot, the soft-pack battery cell and the base plate are bonded with the thermally conductive structural adhesive. This can further improve the connection strength between the battery cell assembly and the housing, reduce the risk of displacement and deformation of the soft-pack battery cell, and at the same time, the thermally conductive structural adhesive has high thermal conductivity, which can conduct the heat generated by the soft-pack battery cell to the base plate of the housing, which helps to reduce the temperature of the soft-pack battery cell and reduce the risk of thermal runaway.

[0059] In some embodiments, the base plate is a heat exchange plate, and the soft-pack battery cells are bonded to the heat exchange plate by thermally conductive structural adhesive.

[0060] In the above technical solution, the bottom plate of the box integrates the function of the heat exchange plate, which can improve the space utilization of the box. The soft-pack battery cells are bonded to the heat exchange plate by thermally conductive structural adhesive. The heat exchange medium flows inside the heat exchange plate. The soft-pack battery cells are bonded to the heat exchange plate by thermally conductive structural adhesive, which can improve the heat exchange efficiency and further reduce the risk of thermal runaway of the soft-pack battery cells.

[0061] In some embodiments, the reinforcement is formed by bending the housing assembly.

[0062] In the above technical solution, the reinforcing part is formed by bending the shell of the shell assembly. The reinforcing part is integrally formed with the shell assembly, which helps to simplify the processing technology, improve the production cycle, and does not introduce new parts, thus helping to reduce production and manufacturing costs.

[0063] In some embodiments, the reinforcing part is wavy.

[0064] In the above technical solution, the reinforcement is set in a wave shape, which can further improve the shell strength of the shell assembly. The shell assembly is not easily deformed and can provide stable support and protection for the soft-pack battery cells, reducing the risk of deformation and displacement of the soft-pack battery cells.

[0065] In some embodiments, the reinforcement is formed by locally thickening the housing of the housing assembly.

[0066] In the above technical solution, the reinforcing part is formed by locally thickening the shell of the shell assembly, which can reduce the processing difficulty of the reinforcing part, facilitate production and manufacturing, and improve production efficiency.

[0067] In some embodiments, the battery device further includes an expansion beam connected to a base plate, and a housing assembly abutting against the expansion beam along a first direction.

[0068] In the above technical solution, the battery device also includes an expansion beam connected to the base plate. The housing assembly abuts against the expansion beam along the first direction, which can reduce the number of internal parts of the housing, improve the utilization rate of the internal space of the housing, accommodate more battery cell components, and help increase the capacity of the battery device. In addition, the expansion beam abuts against the housing assembly along the first direction, which can absorb the expansion force of the soft-pack battery cell and reduce the risk of deformation and damage to the housing assembly.

[0069] Secondly, this application provides an electrical device, including: a battery device according to the first aspect of this application.

[0070] In the above embodiments, by providing a battery device according to the first aspect, the battery cell assembly includes a housing assembly, which includes a partition plate. Since the partition plate divides the housing cavity of the housing assembly into a first chamber and a second chamber that can communicate with each other, and the pouch battery cell is disposed in the first chamber, when a pouch battery cell experiences thermal runaway, the emitted high-temperature and high-pressure medium can enter the second chamber, reducing the risk of thermal runaway of adjacent pouch battery cells. Furthermore, the housing assembly can also reduce the range of movement and deformation of each pouch battery cell. The pouch battery cell is bonded to the housing, which can improve the positional stability of the pouch battery cell within the battery cell assembly and reduce the probability of short circuits or leakage caused by movement of the pouch battery cell. In addition, the housing assembly can also disperse external impact forces, reduce the risk of the pouch battery cell being subjected to excessive impact forces, improve the service life of the pouch battery cell, improve the service life of the battery device, and thus improve the overall performance of the electrical device.

[0071] In some embodiments, the electrical device includes a vehicle, the vehicle includes a floor, the housing includes a second opening, and the floor covers the second opening.

[0072] In the above technical solution, the electrical device includes a vehicle, the vehicle includes a floor, the box includes a second opening, the floor covers the second opening, and the battery device box uses the vehicle's own floor as a box cover for sealing, which can reduce costs, improve space utilization, increase the box capacity, and increase the vehicle chassis height.

[0073] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0074] Figure 1 is a structural schematic diagram of a vehicle according to an embodiment of this application;

[0075] Figure 2 is a schematic diagram of the structure of a battery device according to an embodiment of this application;

[0076] Figure 3 is a schematic diagram of the structure of a battery cell assembly according to some embodiments of this application;

[0077] Figure 4 is a schematic diagram of the structure of a battery cell assembly according to some other embodiments of this application;

[0078] Figure 5 is an exploded view of the battery cell assembly shown in Figure 3;

[0079] Figure 6 is an exploded view of the battery cell assembly shown in Figure 4;

[0080] Figure 7 is a schematic diagram of the structure of a battery cell assembly according to some embodiments of this application.

[0081] Reference numerals: 1. Electrical device; 100. Battery device; 200. Controller; 300. Motor; 400. Battery cell assembly; 401. Housing assembly; 402. Receiving cavity; 403. Divider plate; 4031. First plate; 4032. Second plate; 4021. First chamber; 4022. Second chamber; 410. Soft-pack battery cell; 4033. Gap; 4011. First housing; 4012. Second housing; 4101. First surface; 4102. Second surface; 4103. Adhesive-proof structure; 4011a. First fixing part; 4011b. Second fixing part; 4012a. Third fixing part; 4012b. Fourth fixing part; 430. Housing; 404. First opening; 450. Reinforcing part; 440. Second opening; X. First direction; Y. Second direction. Detailed Implementation

[0082] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0083] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0084] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0085] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0086] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0087] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two).

[0088] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to 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 the embodiments of this application.

[0089] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0090] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include one or more battery cells, and when there are multiple battery cells, they are connected in series, parallel, or mixed connections via a busbar.

[0091] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0092] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0093] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0094] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0095] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0096] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0097] As an example, the housing can be part of the vehicle's chassis structure. For instance, the housing's roof can be at least part of the vehicle's floor, or the housing's frame can be at least part of the vehicle's crossbeams and longitudinal beams.

[0098] In some embodiments, the battery device refers to an energy storage device, which includes a housing with a door on at least one side. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0099] The battery cells mentioned in the embodiments of this application may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application are not limited to these. Battery cells may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited to these shapes either. Battery cells are generally classified into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and the embodiments of this application are not limited to these types either.

[0100] For example, a single battery cell typically includes a housing, a cell assembly, and an electrolyte. The housing is used to house the cell assembly and the electrolyte, and the housing has at least one positive electrode post and at least one negative electrode post. The cell assembly includes one or more electrode assemblies, which are formed by stacking or winding positive electrode sheets, negative electrode sheets, and separators.

[0101] The positive electrode generally includes a positive current collector and a positive active material layer. The positive active material layer is directly or indirectly coated on the positive current collector. The positive current collector without the positive active material layer protrudes from the positive current collector with the positive active material layer. The positive current collector without the positive active material layer serves as a positive electrode tab. Multiple positive electrode tabs are stacked together and form an electrical connection with the positive electrode post. For example, the multiple stacked positive electrode tabs can be directly soldered to the positive electrode post to form an electrical connection; or, the battery cell assembly can also include a positive electrode adapter piece. The multiple stacked positive electrode tabs are soldered to one end of the positive electrode adapter piece, and the other end of the positive electrode adapter piece is soldered to the positive electrode post, so that the positive electrode tabs and the positive electrode post form an electrical connection.

[0102] The negative electrode generally includes a negative current collector and a negative active material layer. The negative active material layer is directly or indirectly coated on the negative current collector. The negative current collector without the negative active material layer protrudes from the negative current collector with the negative active material layer. The negative current collector without the negative active material layer serves as a negative electrode tab. Multiple negative electrode tabs are stacked together and form an electrical connection with the negative electrode post. For example, the stacked negative electrode tabs can be directly welded to the negative electrode post to form an electrical connection; alternatively, the battery cell assembly may also include a negative electrode adapter piece. The stacked negative electrode tabs are welded to one end of the negative electrode adapter piece, and the other end of the negative electrode adapter piece is welded to the negative electrode post, so that the negative electrode tabs and the negative electrode post form an electrical connection. The material of the separator is not limited; for example, it can be polypropylene or polyethylene.

[0103] Meanwhile, individual battery cells primarily function by the movement of metal ions between the positive and negative electrode plates. Taking lithium-ion batteries as an example, the positive electrode current collector can be made of aluminum, and the positive electrode active material layer can be made of lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode current collector can be made of copper, and the negative electrode active material layer can be made of carbon or silicon, etc. During charging and discharging, Li+ ions repeatedly insert and extract between the two electrodes: during charging, Li+ ions extract from the positive electrode, pass through the electrolyte, and insert into the negative electrode, leaving the negative electrode in a lithium-rich state; the reverse occurs during discharging.

[0104] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery packs and battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0105] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, battery devices, as the power source, play an irreplaceable and crucial role. Among them, battery devices, as core components of new energy vehicles, have high requirements in terms of both energy density and reliability.

[0106] Because the soft-pack battery cells use an aluminum-plastic film to wrap the electrode components and electrolyte, the aluminum-plastic film is lightweight, which can significantly reduce the weight of the battery device and increase the energy density of the battery device.

[0107] However, in battery devices using related technologies, when using pouch cells, the low strength of the aluminum-plastic film means that when multiple pouch cells are arranged in the housing, they are prone to mutual compression and deformation, resulting in a high risk of short circuits. Furthermore, when a pouch cell experiences thermal runaway, the runaway gas can easily spread within the battery device, potentially triggering thermal runaway in other pouch cells within the device.

[0108] Based on the above considerations, in order to reduce the mutual compression between pouch battery cells, improve the ability of pouch battery cells to resist external impacts, and reduce the risk of thermal runaway propagation between pouch batteries, this application designs a battery cell assembly. The battery cell assembly includes: a housing assembly having a receiving cavity, the housing assembly including a partition plate disposed in the receiving cavity, the partition plate dividing the receiving cavity into a first chamber and a second chamber that can communicate with each other; a pouch battery cell disposed in the first chamber; wherein, the second chamber is configured to contain the medium discharged from the first chamber. Since the partition plate divides the receiving cavity of the housing assembly into a first chamber and a second chamber that can communicate with each other... The battery pack assembly includes a first chamber and a second chamber. The pouch cell is located in the first chamber. In the event of thermal runaway in a pouch cell, the emitted high-temperature, high-pressure medium can enter the second chamber, reducing the risk of thermal runaway in adjacent pouch cells. Furthermore, the housing assembly reduces the range of movement and deformation of each pouch cell, improving the stability of the cells' position within the battery pack assembly and reducing the probability of short circuits or leakage caused by cell movement. Additionally, the housing assembly can disperse external impact forces, reducing the risk of excessive impact on the pouch cells and extending their lifespan.

[0109] This application provides an electrical device that uses the battery pack or battery device disclosed herein as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0110] For ease of explanation, the following embodiments use a vehicle as an example to describe the structure of the battery device 100 and the battery cell of this application in detail.

[0111] Please refer to Figure 1, which is a schematic diagram of the structure of an electrical device 1 as a vehicle according to some embodiments of this application. The vehicle can be a gasoline vehicle, a natural gas vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. The vehicle is equipped with a battery device 100, which can be located at the bottom, front, or rear of the vehicle. The battery device 100 can be used to supply power to the vehicle; for example, the battery device 100 can serve as the vehicle's operating power source. The vehicle may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle during starting, navigation, and driving. In some embodiments of this application, the battery device 100 can not only serve as the vehicle's operating power source but also as the vehicle's driving power source, replacing or partially replacing gasoline or natural gas to provide driving power to the vehicle.

[0112] Please refer to Figure 2, which is a schematic diagram of the structure of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing 430 and a battery cell assembly 400. The housing 430 provides assembly space for the battery cell assembly 400, and the battery cell assembly 400 is housed within the housing 430.

[0113] The battery cell assembly 400 according to an embodiment of the first aspect of this application is described below with reference to Figures 3-7. Figure 3 is a structural schematic diagram of the battery cell assembly 400 according to some embodiments of this application; Figure 4 is a structural schematic diagram of the battery cell assembly 400 according to other embodiments of this application; Figure 5 is an exploded view of the battery cell assembly 400 shown in Figure 3; Figure 6 is an exploded view of the battery cell assembly 400 shown in Figure 4; and Figure 7 is a structural schematic diagram of the battery cell assembly 400 according to yet another embodiment of this application.

[0114] This application provides a battery device 100 including a housing 430 with a base plate for supporting a battery cell assembly 400. The battery cell assembly 400, as shown in Figures 3-7, includes: a housing assembly 401 having a receiving cavity 402; the housing assembly 401 includes a partition plate 403 disposed in the receiving cavity 402, the partition plate 403 dividing the receiving cavity 402 into a first chamber 4021 and a second chamber 4022 that are interconnected; a pouch battery cell 410 disposed in the first chamber 4021; wherein the second chamber 4022 is configured to receive the medium discharged from the first chamber 4021; and the pouch battery cell 410 is bonded to the housing 430.

[0115] In some embodiments, the pouch cell 410 includes a membrane housing and an electrode assembly and an electrolyte enclosed within the membrane housing. The membrane housing may be an aluminum-plastic membrane, and the electrode assembly includes a positive electrode, a negative electrode, and a separator stacked together.

[0116] The soft-pack battery cell 410 can be attached to the bottom of the housing 430, which helps to maintain the positional stability of the soft-pack battery cell 410 and reduces the risk of short circuit of the soft-pack battery cell 410.

[0117] The number of pouch cell 410 in the battery cell assembly 400 can be one or more. When the number of pouch cell 410 is more than one, it can be two, four, six, seven, ten, fifteen, twenty, thirty or more.

[0118] The housing assembly 401 has a receiving cavity 402 that can accommodate the pouch cell 410, making the structure of the battery cell assembly 400 more compact and improving the energy density of the battery cell assembly 400.

[0119] The partition plate 403 has a plate-like structure, which divides the receiving cavity 402 into a first chamber 4021 and a second chamber 4022 that are interconnected. The first chamber 4021 is used to accommodate the soft-pack battery cell 410, and the second chamber 4022 forms an independent exhaust space. When a soft-pack battery cell 410 experiences thermal runaway, the discharged high-temperature and high-pressure medium can flow into the second chamber 4022 in a timely manner, reducing the risk of thermal runaway spreading to adjacent soft-pack batteries. It can also reduce the possibility of excessive internal pressure in the housing assembly 401 causing it to burst or deform.

[0120] In the above technical solution, on the one hand, because the partition plate 403 divides the receiving cavity 402 of the housing assembly 401 into a first chamber 4021 and a second chamber 4022 that can communicate with each other, when a soft-pack battery cell 410 located in the same first chamber 4021 experiences thermal runaway, the high-temperature and high-pressure medium emitted can quickly enter the second chamber 4022 and will not accumulate in the first chamber 4021, thus reducing the risk of thermal spread between adjacent soft-pack battery cells 410 in the same first chamber 4021; on the other hand, the housing assembly 401 covers the soft-pack battery cell 410, and the excrement is collected through the second chamber 4022, which can delay the spread of excrement to adjacent housing assemblies 401 to a certain extent, thereby further... The housing assembly 401 reduces the risk of heat spread between adjacent pouch cell 410s within the housing cavities 402, thus effectively improving the reliability of the battery device 100. Furthermore, the housing assembly 401 reduces the range of movement and deformation of each pouch cell 410. The pouch cell 410 is bonded to the housing 430, which not only improves the assembly efficiency of the battery cell assembly 400 but also enhances the positional stability of the pouch cell 410 within the battery cell assembly 400, reducing the probability of short circuits or leakage caused by movement of the pouch cell 410. In addition, the housing assembly 401 can disperse external impact forces, reducing the risk of the pouch cell 410 being subjected to excessive impact and extending its service life.

[0121] In some embodiments of this application, a first pressure relief area is provided on the partition plate 403, and the first pressure relief area is configured to connect the first chamber 4021 and the second chamber 4022.

[0122] In some embodiments, the first pressure relief area on the partition plate 403 may be a pressure relief hole, a pressure relief valve, or a weak point.

[0123] During the operation of the battery cell assembly 400, if the soft-pack battery cell 410 in the first chamber 4021 experiences thermal runaway, the generated high-temperature and high-pressure gas can enter the second chamber 4022 through the exhaust channel formed by the first pressure relief zone. This can release the excessive pressure in the first chamber 4021, reduce the risk of the housing assembly 401 exploding or deforming due to excessive internal pressure, and help improve the stability of the battery cell assembly 400.

[0124] In the above technical solution, since the partition plate 403 is provided with a first pressure relief area, the first pressure relief area can release the excessive pressure in the first chamber 4021 to the second chamber 4022 in a timely manner, reducing the risk of the housing assembly 401 exploding or rupturing due to excessive internal pressure when the soft-pack battery cell 410 thermally runs away, and improving the stability of the battery cell assembly 400 structure.

[0125] In some embodiments, the first pressure relief zone includes a through hole disposed on the partition plate 403, the through hole connecting the first chamber 4021 and the second chamber 4022.

[0126] It should be noted that by controlling the size and number of pressure relief holes, the pressure relief threshold can be precisely set, that is, the preset pressure of the first pressure relief zone can be precisely set. And since the cross-sectional area of ​​the pressure relief holes is fixed, a stable pressure relief rate can be achieved.

[0127] In the above technical solution, since the first pressure relief zone is formed as a through hole through the partition plate 403, and the through hole connects the first chamber 4021 and the second chamber 4022, the first pressure relief zone has a simple structure, is easy to process, and has stable and reliable pressure relief performance.

[0128] In some embodiments, the first pressure relief zone includes a weak portion disposed on the partition plate 403, the weak portion being configured to be destroyed under a preset pressure to connect the first chamber 4021 and the second chamber 4022.

[0129] A weak point refers to a specific local area on the partition plate 403 where, due to the combined effects of material properties, geometry, size, or other factors, the strength of that specific area is lower than that of other areas of the partition plate 403.

[0130] When the battery cell assembly 400 is working normally, the weak part can maintain the integrity of the separator 403 structure. However, when subjected to external or internal forces exceeding a certain limit (such as preset pressure), the weak part deforms, cracks, or fails earlier than other areas of the separator 403, thereby realizing the connection between the first chamber 4021 and the second chamber 4022 to achieve pressure relief.

[0131] In some embodiments, the weak portion may be made of a material with lower strength than other parts of the partition plate 403. In some embodiments, the thickness of the weak portion may be thinner than the thickness of other areas of the partition plate 403. In some embodiments, the structurally weak area may have a weakening hole or a weakening groove or similar structure.

[0132] In the above technical solution, since the first pressure relief zone is formed in the weak part of the separator plate 403, it can achieve stable pressure relief when thermal runaway occurs. At the same time, there is no need to introduce additional pressure relief components. This not only reduces the number of components and assembly work, simplifies the manufacturing process of the pressure relief structure, and reduces costs, but also reduces the space occupied by the first pressure relief zone and improves the energy density of the battery cell module 400.

[0133] In some embodiments, the weak portion includes a groove provided on the partition plate 403, the groove being configured to tear under a preset pressure to connect the first chamber 4021 and the second chamber 4022.

[0134] The scoring can create stress concentration in structurally weak areas. When the pressure in the first chamber 4021 increases, the stress will preferentially accumulate in the scoring areas, allowing these areas to precisely fracture or deform under a preset pressure, thereby achieving pressure relief. This can guide the fracture direction in structurally weak areas, increase the pressure relief area after fracture, and improve the speed and efficiency of pressure relief.

[0135] It should be noted that by precisely controlling the depth, width, and shape of the grooves, the structural strength of the weak parts can be adjusted, and the pressure threshold for pressure relief can be flexibly set according to different pouch cell 410.

[0136] In the above technical solution, since the weak part can be a groove formed on the partition plate 403, the groove can guide the rupture direction of the first pressure relief zone when thermal runaway occurs. According to the setting position of the groove, the pressure relief position and pressure relief area after the first pressure relief zone ruptures can be flexibly controlled, thereby improving the pressure relief speed and efficiency.

[0137] In some embodiments, the first end of the partition plate 403 is connected to the wall of the housing assembly 401, and the second end is spaced apart from the wall of the housing assembly 401 to form a gap, the gap being connected to the first chamber 4021 and the second chamber 4022.

[0138] The first end of the partition plate 403 is connected to the wall of the housing assembly 401, and the second end is spaced apart from the wall of the housing assembly 401. While the partition plate 403 separates the first chamber 4021 and the second chamber 4022, the gap formed between the partition plate 403 and the wall becomes an air passage connecting the first chamber 4021 and the second chamber 4022.

[0139] In the above technical solution, the first end of the partition plate 403 is connected to the wall of the housing assembly 401, and the second end is spaced apart from the wall of the housing assembly 401 to form a gap. In the event of thermal runaway, the high temperature and high pressure medium in the first chamber 4021 can flow to the second chamber 4022 through the gap. The pressure relief structure is simple, easy to process, and can achieve stable pressure relief.

[0140] In some embodiments, the partition plate 403 includes a first plate 4031 and a second plate 4032, the first plate 4031 and the second plate 4032 are disposed opposite to each other and are respectively connected to the wall of the housing assembly 401, and a gap 4033 is formed between them, the gap 4033 communicating with the first chamber 4021 and the second chamber 4022.

[0141] In some embodiments, the partition plate 403 includes two parts: a first plate 4031 and a second plate 4032. The first plate 4031 and the second plate 4032 are disposed opposite to each other and are respectively connected to the wall of the housing assembly 401, and a gap 4033 is formed between them. The first plate 4031 and the second plate 4032 may be disposed together along the thickness direction of the soft-pack battery cell 410, and the sum of the dimensions of the first plate 4031 and the second plate 4032 is less than the sum of the thickness dimensions of the soft-pack battery cells 410 in the receiving cavity 402. Alternatively, the first plate 4031 and the second plate 4032 may be disposed opposite to each other along the thickness direction of the soft-pack battery cell 410, and the two may be spaced apart along the width of the soft-pack battery cell 410. In this case, the sum of the dimensions of the first plate 4031 and the second plate 4032 along the thickness direction of the soft-pack battery cell 410 may be greater than, equal to or less than the sum of the dimensions of the soft-pack battery cells 410 in the receiving cavity 402.

[0142] In the above technical solution, the partition plate 403 includes a first plate 4031 and a second plate 4032. The first plate 4031 and the second plate 4032 are arranged at intervals relative to each other and are respectively connected to the wall of the housing assembly 401. The gap 4033 formed between the two allows the high-temperature and high-pressure medium in the first chamber 4021 to flow to the second chamber 4022 in the event of thermal runaway. The pressure relief structure is simple to form, easy to process, and has stable and reliable pressure relief performance.

[0143] In some embodiments, the housing assembly 401 further includes a first housing 4011 and a second housing 4012, the first housing 4011 and the second housing 4012 together forming a receiving cavity 402, and a partition plate 403 connected to the first housing 4011 and / or the second housing 4012.

[0144] The housing assembly 401 includes a first housing 4011 and a second housing 4012. The first housing 4011 and the second housing 4012 together form a receiving cavity 402. A partition plate 403 is connected to the first housing 4011 and / or the second housing 4012. The first housing 4011 and / or the second housing 4012 have an F-shaped structure. When assembling the battery cell assembly 400, the pouch battery cell 410 can be assembled through the opening of the F-shaped housing. When installing multiple pouch battery cells 410, there is no need to deform the housing, which can improve the installation accuracy and efficiency of the battery cell assembly. In addition, the size of the first housing 4011 or the second housing 4012 can be flexibly adjusted according to the number, size and size of the pouch battery cells 410 to adapt to different types of battery cell assemblies.

[0145] In the above technical solution, the housing assembly 401 includes a first housing 4011 and a second housing 4012. The first housing 4011 and the second housing 4012 together form a receiving cavity 402. The split housing structure can facilitate the assembly of the soft-pack battery cell 410 into the housing without deforming the housing, which can improve assembly accuracy and assembly efficiency. At the same time, the partition plate 403 is connected to the first housing 4011 and / or the second housing 4012, which can reduce the processing difficulty, provide flexible setting, and improve processing efficiency.

[0146] In some embodiments, the battery cell assembly 400 includes a plurality of pouch battery cells 410, each pouch battery cell 410 including two opposing first surfaces 4101 and two opposing second surfaces 4102, the surface area of ​​the first surfaces 4101 being larger than that of the second surfaces 4102; a first housing 4011 includes a first fixing portion 4011a and a second fixing portion 4011b, the first fixing portion 4011a and the second fixing portion 4011b being connected at an included angle; the first fixing portion 4011a covers at least a portion of the first surface 4101 along a first direction X, and the second fixing portion 4011b covers the second surface 4102 of each pouch battery cell 410 along a second direction Y; a second housing 4012 includes a third fixing portion 4012a, the third fixing portion 4012a being disposed on the side of the second fixing portion 4011b away from the first fixing portion 4011a, and covering at least a portion of the first surface 4101 along the first direction X.

[0147] Depending on its molding process, the pouch battery cell 410 can be cylindrical, square, or pouch-shaped. Here, we take the pouch-shaped pouch battery cell 410 as an example. The first direction X refers to the thickness direction of the pouch battery cell 410, and the second direction Y refers to the width direction of the pouch battery cell 410. The first surface 4101 refers to the surface opposite to the pouch battery cell 410 along its thickness direction, and is also the surface with the largest surface area of ​​the pouch battery cell 410. The second surface 4102 refers to the surface opposite to the pouch battery cell 410 along its width direction. The first surface 4101 and the second surface 4102 can be connected by a radius (R-angle). The first housing 4011 includes a first fixing part 4011a and a second fixing part 4011b. The two are connected to form an L-shaped structure. The first fixing part 4011a has a plate-like structure and extends along the width direction of the soft-pack battery cell 410. The second fixing part 4011b has a plate-like structure and extends along the thickness direction of the soft-pack battery cell 410. The second housing 4012 includes a third fixing part 4012a, which is disposed on the side of the second fixing part 4011b away from the first fixing part 4011a. The third fixing part 4012a has a plate-like structure and extends along the width direction of the soft-pack battery cell 410. The first fixing part 4011a, the second fixing part 4011b and the third fixing part 4012a cooperate to form a U-shaped housing structure. The partition plate 403 can be connected to the first fixing part 4011a and / or the third fixing part 4012a.

[0148] In the above technical solution, the first housing 4011 includes a first fixing part 4011a and a second fixing part 4011b. The first fixing part 4011a covers at least a portion of the first surface 4101 along the first direction X, and the second fixing part 4011b covers the second surface 4102 of each pouch battery cell 410 along the second direction Y. The second housing 4012 includes a third fixing part 4012a. The third fixing part 4012a is disposed on the side of the second fixing part 4011b away from the first fixing part 4011a, and covers at least a portion of the first surface 4101 along the first direction X. The housing assembly 401 presents a U-shaped structure, which allows the pouch battery cell 410 to be stably maintained in the accommodating space formed by the housing assembly 401, reducing the risk of displacement of the pouch battery cell 410. At the same time, the entire battery cell assembly 400 has a simple and compact structure, which can reduce the risk of deformation of the accommodating cavity 402 when the battery cell assembly 400 is subjected to external impact, and can also improve the energy density of the battery cell assembly 400.

[0149] In some embodiments, the first surface 4101 and the second surface 4102 of any pouch cell 410 are connected by a transition portion.

[0150] Since the outer casing of the pouch cell 410 is usually made of aluminum-plastic film, the casing strength is insufficient. In order to reduce the risk of casing cracking during molding, a transition part is needed to connect the first surface 4101 and the second surface 4102.

[0151] In the above technical solution, the first surface 4101 and the second surface 4102 of any soft-pack battery cell 410 are connected through a transition portion, which can increase the connection strength and reduce the risk of cracking of the outer shell of the soft-pack battery cell 410.

[0152] In some embodiments, the transition portion is an R-angle.

[0153] In the above technical solution, the transition part is an R-angle, which is beneficial to the processing and manufacturing of the soft-pack battery cell 410 shell, improves the shell's crack resistance, and can improve the production efficiency of the soft-pack battery cell 410.

[0154] In some embodiments, a baffle structure 4103 is provided between the R-angles of any two adjacent pouch cell 410 located in the same receiving cavity 402, and the baffle structure 4103 is provided at the bottom of the housing 430.

[0155] Optionally, in some embodiments, a baffle structure 4103 is provided between the R-angle of the soft-pack battery cells 410 on both sides of the first direction X within the same receiving cavity 402 and the housing assembly 401.

[0156] Since the housing assembly 401 has a first opening 404 on the side near the bottom of the box 430, the side of the soft-pack battery cell 410 near the first opening 404 needs to be bonded to the bottom of the box 430. In order to ensure the bonding area and avoid stress concentration in the R-corner area after the glue cures, a glue-blocking structure 4103 needs to be set between the R-corners of two adjacent soft-pack battery cells 410 and between the R-corner and the housing assembly 401 to reduce the risk of glue overflow and reduce the risk of stress concentration in the R-corner area.

[0157] The adhesive barrier structure 4103 can be a boss set at the bottom of the housing 430, or an adhesive barrier strip, etc.

[0158] In the above technical solution, a glue-blocking structure 4103 is provided between the R-corners of any two adjacent soft-pack battery cells 410 in the same receiving cavity 402. This can prevent glue from overflowing to the R-corners when the soft-pack battery cells 410 are bonded to the housing 430, thereby reducing the risk of stress concentration at the R-corners of the soft-pack battery cells 410.

[0159] In some embodiments, the adhesive-blocking structure is an adhesive-blocking strip.

[0160] In the above technical solution, the adhesive barrier structure is an adhesive barrier strip, which can be directly glued to the bottom of the box 430. The structure is simple, easy to install, and highly reliable.

[0161] In some embodiments, the second fixing part 4011b is vertically connected to the first fixing part 4011a; the partition plate 403 is vertically connected to the first fixing part 4011a and is spaced apart from the second fixing part 4011b along the second direction Y; the first fixing part 4011a, the second fixing part 4011b, the third fixing part 4012a and the partition plate 403 together enclose the second chamber 4022; the first fixing part 4011a, the partition plate 403 and the third fixing part 4012a together enclose the first chamber 4021.

[0162] The partition plate 403 divides the receiving cavity 402 and cooperates with the first fixing part 4011a, the second fixing part 4011b and the third fixing part 4012a to form the first chamber 4021 and the second chamber 4022. The first chamber 4021 is used to accommodate the soft-pack battery cell 410, and the second chamber 4022 forms an independent exhaust space. The housing assembly 401 does not need to be provided with a separate isolation component to form an exhaust space, which can reduce the number of parts of the housing assembly 401, save materials, simplify the processing technology, and also reduce the space occupied by the housing assembly 401 along the width direction of the soft-pack battery cell 410.

[0163] In the above technical solution, the first fixing part 4011a, the second fixing part 4011b, the third fixing part 4012a and the partition plate 403 together form the second chamber 4022, and the first fixing part 4011a, the partition plate 403 and the third fixing part 4012a together form the first chamber 4021. The partition plate 403 and the second fixing part 4011b are spaced apart along the second direction Y, which can not only divide the first receiving cavity 402 and the second receiving cavity 402, but also eliminate the need for additional partitions in the second receiving cavity 402. This makes the structure of the housing assembly 401 simpler, the processing efficiency higher, saves materials, reduces costs, and also reduces the size of the entire battery cell assembly 400 along the second direction Y, thereby increasing the energy density of the battery cell assembly 400.

[0164] In some embodiments, the second housing 4012 further includes a fourth fixing part 4012b, and the third fixing part 4012a and the fourth fixing part 4012b are connected at an angle; the fourth fixing part 4012b is disposed with the second fixing part 4011b and together cover the second surface 4102 along the second direction Y.

[0165] The second housing 4012 also includes a fourth fixing part 4012b, which has a plate-like structure and extends along the thickness direction of the soft-pack battery cell 410. The third fixing part 4012a and the fourth fixing part 4012b are connected to form an L-shaped structure. The first housing 4011 and the second housing 4012 are arranged opposite to each other along the thickness direction of the soft-pack battery cell 410. The second fixing part 4011b and the fourth fixing part 4012b are mated together. After the battery cell assembly 400 is installed, they can jointly cover the second surface 4102 of the soft-pack battery cell 410 along the width direction of the soft-pack battery cell 410, reducing the possibility of foreign objects entering the battery cell assembly 400, thereby reducing the risk of short circuit or damage to the soft-pack battery cell 410.

[0166] In the above technical solution, the second housing 4012 also includes a fourth fixing part 4012b. The third fixing part 4012a and the fourth fixing part 4012b are connected at an angle to form an L-shaped structure. The fourth fixing part 4012b and the second fixing part 4011b are mated together and together cover the second surface 4102 of the soft-pack battery cell 410 along the second direction Y. This makes the structure of the entire housing assembly 401 more compact, and the soft-pack battery cell 410 in the receiving cavity 402 is less likely to be displaced. When subjected to external impact, the housing assembly 401 can stably support the soft-pack battery cell 410, reduce the possibility of deformation of the soft-pack battery cell 410, and also reduce the possibility of foreign objects entering the battery cell assembly 400, thereby reducing the risk of short circuit or damage to the soft-pack battery cell 410.

[0167] In some embodiments, the projections of the second fixing portion 4011b and the fourth fixing portion 4012b along the second direction Y at least partially overlap.

[0168] The second fixing part 4011b and the fourth fixing part 4012b extend relative to each other along the first direction X and are not located on the same plane. The projections of the second fixing part 4011b and the fourth fixing part 4012b along the second direction Y at least partially overlap. The two parts can be connected by welding, snap-fitting or riveting.

[0169] In the above technical solution, the projections of the second fixing part 4011b and the fourth fixing part 4012b along the second direction Y at least partially overlap, which can reduce the risk of foreign objects entering the first chamber 4021 through the second chamber 4022 and reduce the risk of short circuit or damage to the soft-pack battery cell 410.

[0170] In some embodiments, the second fixing part 4011b and the fourth fixing part 4012b are welded together on the side that is close to each other along the first direction X.

[0171] When the two are on the same plane, they can be welded together to form a whole along the side that is close to each other in the first direction X.

[0172] In the above technical solution, the second fixing part 4011b and the fourth fixing part 4012b are located on the same plane and welded together, which can make the housing assembly 401 more compact, reduce the space occupied by the housing assembly 401 along the first direction X and the second direction Y, and at the same time prevent foreign objects from entering the second chamber 4022, reducing the risk of short circuit or damage to the soft pack battery cell 410.

[0173] In some embodiments, the battery cell assembly 400 includes a plurality of housing assemblies 401, which are arranged sequentially along a first direction X, and each housing assembly 401 has a soft-pack battery cell 410 disposed in its receiving cavity 402.

[0174] The battery cell assembly 400 includes a plurality of housing assemblies 401 arranged sequentially along the thickness direction of the pouch battery cell 410. Each housing assembly 401 has a pouch battery cell 410 disposed in its receiving cavity 402, which can improve the assembly efficiency of the battery cell assembly 400.

[0175] Meanwhile, multiple housing assemblies 401 form multiple receiving cavities 402 to respectively accommodate multiple pouch battery cells 410. When a pouch battery cell 410 in one of the receiving cavities 402 experiences thermal runaway, the thermal runaway is not easily conducted to the pouch battery cells 410 in the receiving cavities 402 of adjacent housing assemblies 401 due to the separation and blocking effect of the housing assemblies 401. This can reduce the risk of thermal propagation, improve the stability of the battery cell assembly 400, and thus improve the life of the battery device.

[0176] Multiple housing components 401 are interconnected to form a whole, which can improve the deformation resistance of the entire battery cell assembly 400 when subjected to external impact and reduce the risk of deformation and damage to the pouch battery cell 410.

[0177] In the above technical solution, the battery cell assembly 400 includes multiple housing assemblies 401. Each housing assembly 401 has a receiving cavity 402 containing a pouch battery cell 410, which can further improve the assembly efficiency of the battery cell assembly 400. At the same time, the multiple pouch battery cells 410 are dispersedly housed in the receiving cavities 402 of different housing assemblies 401. When a pouch battery cell 410 in one of the receiving cavities 402 experiences thermal runaway, the housing assembly 401 can prevent the thermal runaway from spreading to the pouch battery cells 410 in the adjacent receiving cavities 402, thereby reducing the risk of thermal diffusion in the battery cell assembly 400.

[0178] In some embodiments, at least two partially adjacent housing assemblies 401 share a portion of the housing.

[0179] The battery cell assembly includes multiple housing assemblies 401 arranged sequentially along the thickness direction of the pouch battery cell 410. At least some of the adjacent housing assemblies 401 share a portion of the housing, which can save materials and reduce the manufacturing cost of the housing assembly 401. Furthermore, sharing the housing can reduce the volume of the battery cell assembly 400, reduce the space occupied by the battery device housing 430, and improve the volume utilization rate of the housing 430.

[0180] In the above technical solution, at least some of the two adjacent housing components 401 share a portion of the housing, which can save materials and reduce production costs. At the same time, sharing the housing can reduce the space occupied by the housing component 401 in the battery box 430, increase the battery energy density, and also help improve the assembly efficiency of the battery cell component 400.

[0181] In some embodiments, the pouch cell 410 includes two first surfaces 4101 disposed opposite each other along a first direction X, and any two adjacent housing assemblies 401, wherein the portion of the first housing 4011 of one of the assemblies covering the first surface 4101 shares a housing with the portion of the second housing 4012 of the other of the assemblies covering the first surface 4101.

[0182] Any two adjacent housing assemblies 401, wherein the first housing 4011 of one of them covers a portion of the first surface 4101 of the soft-pack battery cell 410 in the corresponding receiving cavity 402 along the thickness direction of the soft-pack battery cell 410 and the second housing 4012 of the other of them covers a portion of the first surface 4101 of the soft-pack battery cell 410 in the corresponding receiving cavity 402 along the thickness direction X of the soft-pack battery cell 410.

[0183] Multiple pouch battery cells 410 are distributed in the receiving cavities 402 of multiple housing assemblies 401. Along the thickness direction of the pouch battery cells 410, the first housing 4011 of any housing assembly 401 covers the first surface 4101 in the corresponding receiving cavity 402, and the second housing 4012 of another housing assembly 401 covers the first surface 4101 in the corresponding receiving cavity 402. The first housing 4011 of one housing assembly 401 can serve as the second housing 4012 of another housing assembly 401, and similarly, the second housing 4012 of another housing assembly 401 can serve as the first housing 4011 of one housing assembly 401, so as to realize the function of sharing a housing.

[0184] In some embodiments, multiple pouch battery cells 410 are respectively accommodated in any two adjacent receiving cavities 402. Along the thickness direction of the pouch battery cell 410, the housing assemblies 401 corresponding to the two first surfaces 4101 of the adjacent receiving cavities 402 that are close to each other can share a housing. For example, the first surface 4101 of the pouch battery cell 410 at the end of the thickness direction in one of the receiving cavities 402 is the surface facing the opening of the first housing 4011, and the first surface 4101 of the pouch battery cell 410 at the end of the thickness direction in the corresponding other receiving cavity 402 can be the surface away from the opening of its corresponding first housing 4011, and vice versa. The housings of the housing assemblies 401 corresponding to these two first surfaces 4101 can be shared.

[0185] In the above technical solution, the pouch battery cell 410 includes a first surface 4101 disposed opposite to each other along the first direction X, and two adjacent housing assemblies 401, wherein the portion of the first housing 4011 of one of the housings covering the first surface 4101 shares the housing with the portion of the second housing 4012 of the other housing covering the first surface 4101. This simplifies the housing structure of the housing assembly 401, facilitates the processing and manufacturing of the housing assembly 401, improves processing efficiency, reduces processing costs, and also helps to reduce the thickness of the housing assembly 401 between the pouch battery cells 410 in two adjacent accommodating cavities 402. This helps to reduce the space occupied by the battery cell assembly 400 along the first direction X, making the structure of the battery cell assembly more compact and helping to improve the energy density of the battery cell assembly 400.

[0186] In some embodiments, the battery cell assembly 400 includes a plurality of pouch battery cells 410 and an adhesive. Each pouch battery cell 410 includes two first surfaces 4101 disposed opposite each other along a first direction X. The first surfaces 4101 of the plurality of pouch battery cells 410 are connected to each other and to the housing assembly 401 by the adhesive.

[0187] The battery cell assembly 400 includes multiple pouch battery cells 410. Each pouch battery cell 410 includes two first surfaces 4101 arranged opposite each other along its thickness direction. The first surfaces 4101 are the surfaces with the largest surface area of ​​the pouch battery cell 410. The first surfaces 4101 of the multiple pouch battery cells 410 are bonded together with an adhesive to form a battery pack. The battery pack and the housing assembly 401 are also bonded together with an adhesive to form a whole, making the structure of the battery cell assembly 400 more compact. The housing assembly 401 provides better fixation and protection for the pouch batteries. After the pouch battery cells 410 are bonded together to form the battery pack, they are less prone to displacement and deformation. Furthermore, after the housing assembly 401 is bonded to the battery pack, the risk of relative displacement between the housing assembly 401 and the battery pack is reduced, which can improve the stability of the housing assembly 401 in supporting and protecting the pouch battery cells 410.

[0188] When the pouch battery cells 410 are assembled into the housing, an adhesive can be pre-applied to the first surface 4101 of each pouch battery cell 410 and to the housing portion of the housing assembly 401 corresponding to the first surface 4101. The pouch battery cells 410 are sequentially inserted into the housing, and the first surfaces 4101 and the housing assembly 401 are bonded together to form a whole, which can improve assembly efficiency and assembly accuracy.

[0189] In the above technical solution, the battery cell assembly 400 includes a plurality of pouch battery cells 410 and an adhesive. The pouch battery includes two first surfaces 4101 disposed opposite to each other along the first direction X. The first surfaces 4101 of the plurality of pouch battery cells 410 and the housing assembly 401 corresponding to the first surfaces 4101 are connected to each other by the adhesive, which can improve the structural strength of the entire battery cell assembly 400. When subjected to external vibration and impact, the impact force can be dispersed to the entire battery cell assembly 400, making it less likely for individual pouch battery cells 410 to deform and reducing the risk of damage to the battery cell assembly 400.

[0190] In some embodiments, the housing assembly 401 is made of metal or plastic.

[0191] Optionally, in some embodiments, when the material of the housing assembly 401 is metal, it can be aluminum or steel, etc., and when the material of the housing assembly 401 is plastic, it can be a composite material with high hardness or a non-metallic material such as PA, PC, PET, etc.

[0192] The housing assembly 401 is made of metal or plastic. Compared with the aluminum-plastic film shell of the soft-pack battery cell 410, it has a more stable structure and higher strength. It can reduce the probability of deformation of the cavity 402 where the soft-pack battery cell 410 is located, effectively protect the soft-pack battery cell 410, and improve the stability and service life of the soft-pack battery cell 410.

[0193] In the above technical solution, the material of the housing component 401 is metal or plastic, and its hardness is higher than that of the outer shell of the soft-pack battery cell 410. When subjected to external vibration and impact, the housing component 401 can provide support and protection for the soft-pack battery cell 410, reducing the risk of deformation and damage to the soft-pack battery cell 410.

[0194] In some embodiments, the pouch cell 410 is any one of a lithium iron phosphate cell, a ternary lithium cell, and a solid-state cell.

[0195] In this embodiment, the soft-pack battery cell 410 can be any one of a lithium iron phosphate battery cell, a ternary battery cell, or a solid-state battery cell. Lithium iron phosphate battery cells have advantages such as high safety, long cycle life, and good high-temperature performance. Ternary battery cells have advantages such as high energy density and fast charging. Solid-state battery cells have advantages such as high safety, high energy density, and long cycle life. For example, solid-state battery cells can be sulfide solid-state batteries, oxide solid-state batteries, polymer solid-state batteries, composite solid-state electrolyte batteries, garnet solid-state batteries, etc.

[0196] As an optional solution, in some embodiments, when the pouch cell 410 is a lithium iron phosphate cell, the positive electrode material of the pouch cell 410 has the following proportions: the positive electrode active material accounts for 96 parts of the total weight of the positive electrode material; the binder accounts for 1 to 3 parts of the total weight of the positive electrode material (e.g., including but not limited to 1, 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, 3, etc.); and the conductive agent accounts for 1 to 3 parts of the total weight of the positive electrode material (e.g., including but not limited to 1, 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, 3, etc.). For example, when the pouch cell 410 is a lithium iron phosphate cell, the positive electrode active material is LFP (which can refer to LiFePO4, i.e., lithium iron phosphate), the binder can be PVDF (polyvinylidene fluoride), and the conductive agent can be conductive carbon black. The ratio of LFP:PVDF:conductive carbon black can be 96:2:2, meaning that out of 100 parts of the total weight of the positive electrode active material, LFP accounts for 96 parts, PVDF accounts for 2 parts, and conductive carbon black also accounts for 2 parts. The weight unit for the positive electrode active material can be 10 grams. When the pouch cell 410 is a ternary lithium battery cell, the positive electrode active material accounts for 96 parts of the total weight of the positive electrode material, the binder accounts for 2-3 parts (e.g., including but not limited to 2, 2.2, 2.5, 2.8, 3, etc.), and the conductive agent accounts for 1-2 parts (e.g., including but not limited to 1, 1.2, 1.5, 1.8, 2, etc.). The ternary lithium battery cell can be, but is not limited to, lithium nickel cobalt manganese oxide, lithium nickel cobalt 15 aluminum oxide, etc. For example, the ternary material in the ternary lithium battery cell can be an octet LiNi alloy. 0.8 Co 0.1 Mn 0.1 The weight ratio of O2, positive electrode active material, binder, and conductive agent is 96:2.5:1.5, meaning the total weight of the positive electrode material is divided into 100 parts. (This refers to the octet LiNi...) 0.8 Co 0.1 Mn 0.1The composition of O2 is 96 parts, binder is 2.5 parts, and conductive agent is 1.5 parts. In the above technical solution, when the pouch battery cell 410 is a lithium iron phosphate cell, the high proportion of positive electrode active material means that more substances capable of electrochemical reactions can be accommodated within a limited electrode assembly. This is beneficial for increasing the capacity and energy density of the battery device 100, enabling the lithium iron phosphate cell to output higher power while maintaining a relatively small volume and weight, meeting the application scenarios with certain energy density requirements. The use of binder and conductive agent within the above range can reduce the cost of auxiliary materials, thereby reducing the overall cost of the battery device 100. When the pouch battery cell 410 is a ternary cell, due to the relatively complex structure and surface properties of ternary materials, using the above proportions of positive electrode active material, binder, and conductive agent helps to ensure good adhesion between positive electrode active material particles and between the active material and the current collector, thereby improving the mechanical stability and integrity of the electrode assembly. This helps to reduce the risk of active material detachment and electrode pulverization during charging and discharging, and extends the cycle life of the battery device 100.

[0197] In the above technical solution, the soft-pack battery cell 410 is set as any one of lithium iron phosphate battery cell, ternary battery cell, and solid-state battery cell, so that the soft-pack battery cell 410 can be flexibly set as different types of battery cells as needed, thereby making the application scenarios of the soft-pack battery cell 410 wider and enabling the battery device to better meet different usage needs.

[0198] In some embodiments, the housing assembly 401 includes a first opening 404 that communicates with a first chamber 4021. A reinforcing portion 450 is provided near the first opening 404, and the housing assembly 401 is connected to the base plate via the reinforcing portion 450.

[0199] The pouch battery cell 410 can be assembled by inserting it into the casing through the first opening 404. The battery cell assembly 400 is fixedly connected to the bottom plate of the housing 430 through the housing assembly 401. The first opening 404 is close to the bottom plate of the housing 430, and the reinforcing part 450 is set close to the first opening 404, which can improve the housing strength of the housing assembly 401 and make the first opening 404 less prone to deformation. The housing assembly 401 can effectively fix the pouch battery cell 410, while ensuring the stability of the connection between the battery cell assembly 400 and the housing 430. It can provide stable support for the pouch battery cell 410, prevent the pouch battery cell 410 from being deformed by external impact, and disperse the external impact force to the entire housing 430, thereby improving the service life of the pouch battery cell 410.

[0200] In the above technical solution, the housing assembly 401 includes a first opening 404, which communicates with the first chamber 4021. A reinforcing part 450 is provided near the first opening 404 in the housing assembly 401. The housing assembly 401 is connected to the base plate through the reinforcing part 450, which allows the battery cell assembly 400 to be connected to the housing 430 of the battery device 100 as a whole. This can further improve the vibration and impact resistance of the soft-pack battery cell 410 and reduce the risk of deformation and displacement of the soft-pack battery cell 410. At the same time, the reinforcing part 450 can improve the strength of the housing assembly 401, making the housing assembly 401 less prone to deformation and providing stable support for the soft-pack battery cell 410.

[0201] In some embodiments, the base plate is provided with a slot, and the reinforcing part 450 is inserted into the slot.

[0202] In the above technical solution, the base plate is provided with a slot, and the reinforcing part 450 is inserted into the slot, which can improve the connection strength between the shell assembly 401 and the base plate of the box 430. When subjected to vibration and impact, it is not easy to separate from the box 430. It can also distribute the impact force to the entire box 430, so that the stress is even and the shell assembly 401 is not easily deformed. At the same time, the reinforcing part 450 is inserted into the slot, which can reduce the size of the shell assembly 401 along the second direction Y, which is beneficial to save space in the box 430 and improve space utilization.

[0203] In some embodiments, the battery device 100 further includes a thermally conductive structural adhesive, which is used to bond the side of the pouch cell 410 near the first opening 404 to the base plate.

[0204] The side of the pouch battery cell 410 near the first opening 404 can be the second surface 4102 of the pouch battery cell 410 near the first opening 404. The second surfaces 4102 of multiple pouch batteries near the first opening 404 are bonded to the bottom plate of the housing 430 by thermally conductive structural adhesive, which can improve the bonding force between the battery cell assembly 400 and the housing 430. When subjected to external impact and vibration, the pouch battery cell 410 is not easy to be displaced or deformed.

[0205] In the above technical solution, the battery device 100 includes a thermally conductive structural adhesive. The side of the soft-pack battery cell 410 near the first opening 404 is bonded to the base plate by the thermally conductive structural adhesive. Based on the reinforcement part 450 of the housing assembly 401 being fixed to the base plate through a slot, the soft-pack battery cell 410 and the base plate are bonded by the thermally conductive structural adhesive, which can further improve the connection strength between the battery cell assembly 400 and the housing 430 and reduce the risk of displacement and deformation of the soft-pack battery cell 410. At the same time, the thermally conductive structural adhesive has a high thermal conductivity, which can conduct the heat generated by the soft-pack battery cell 410 to the base plate of the housing 430, which is beneficial to reduce the temperature of the soft-pack battery cell 410 and reduce the risk of thermal runaway.

[0206] In some embodiments, the base plate is a heat exchange plate, and the soft-pack battery cell 410 is bonded to the heat exchange plate by thermally conductive structural adhesive.

[0207] The heat exchange plate has heat exchange channels formed inside, which are used to contain and flow the heat exchange medium. The heat exchange medium can come into contact with the soft-pack battery cell 410 at intervals through the heat exchange plate to exchange heat with the soft-pack battery cell 410.

[0208] Since the heat exchange plate exchanges heat with the pouch cell 410, when the temperature of the pouch cell 410 is high, heat can be transferred to the heat exchanger through thermal conduction, so that the pouch cell 410 is in a suitable operating temperature range, thereby improving the service life of the battery device 100. When the temperature of the pouch cell 410 is too low, the heat exchange medium can heat the pouch cell 410 through the heat exchanger to improve the charging and discharging efficiency of the pouch cell 410.

[0209] In the above technical solution, the bottom plate of the housing 430 integrates the function of a heat exchange plate, which can improve the space utilization of the housing 430. The soft-pack battery cell 410 is bonded to the heat exchange plate by thermally conductive structural adhesive. A heat exchange medium flows inside the heat exchange plate. The bonding of the soft-pack battery cell 410 to the heat exchange plate by thermally conductive structural adhesive can improve the heat exchange efficiency and further reduce the risk of thermal runaway of the soft-pack battery cell 410. At the same time, it can keep the soft-pack battery cell 410 in a suitable operating temperature range, improve the charging and discharging efficiency of the soft-pack battery cell 410, and extend the service life of the battery device 100.

[0210] In some embodiments, the reinforcement 450 is formed by bending the housing of the housing assembly 401.

[0211] In the above technical solution, the reinforcing part 450 is formed by bending the shell of the shell assembly 401. The reinforcing part 450 and the shell assembly 401 are integrally formed, which helps to simplify the processing technology, improve the production cycle, and does not introduce new parts, thus helping to reduce production and manufacturing costs.

[0212] In some embodiments, the reinforcing part 450 is wavy.

[0213] In the above technical solution, the reinforcing part 450 is set in a wave shape, which can further improve the shell strength of the shell assembly 401. The shell assembly 401 is not easily deformed and can provide stable support and protection for the soft-pack battery cell 410, reducing the risk of deformation and displacement of the soft-pack battery cell 410.

[0214] In some embodiments, the reinforcement 450 is formed by a partial thickening of the housing of the housing assembly 401.

[0215] In the above technical solution, the reinforcing part 450 is formed by locally thickening the shell of the shell assembly 401, which can reduce the processing difficulty of the reinforcing part 450, facilitate production and manufacturing, and improve production efficiency.

[0216] In some embodiments, the battery device 100 further includes an expansion beam connected to a base plate, and a housing assembly 401 abuts against the expansion beam along a first direction X.

[0217] The expansion beams generally abut against both sides of the housing assembly 401 of the battery cell assembly 400 along the thickness direction of the soft-pack battery cell 410. They can absorb the expansion force of the soft-pack battery cell 410, reduce the risk of deformation of the housing assembly 401, ensure that the housing assembly 401 can stably maintain the position of the soft-pack battery cell 410, and reduce the risk of displacement deformation of the soft-pack battery cell 410, which could lead to short circuit and leakage.

[0218] In the above technical solution, the battery device 100 also includes an expansion beam connected to the base plate. The housing assembly 401 abuts against the expansion beam along the first direction X, which can reduce the number of internal parts of the housing 430, improve the utilization rate of the internal space of the housing 430, accommodate more battery cell assemblies 400, and help increase the capacity of the battery device 100. In addition, the expansion beam abuts against the housing assembly 401 along the first direction X, which can absorb the expansion force of the soft-pack battery cell 410 and reduce the risk of deformation and damage to the housing assembly 401.

[0219] Secondly, this application provides an electrical device 1, including a battery device 100 according to the first aspect of this application.

[0220] In the above embodiments, by providing the battery device 100 of the first aspect, the battery cell assembly 400 includes a housing assembly 401, and the housing assembly 401 includes a partition plate 403. Since the partition plate 403 divides the receiving cavity 402 of the housing assembly 401 into a first chamber 4021 and a second chamber 4022 that can communicate with each other, the pouch battery cell 410 is disposed in the first chamber 4021. When a pouch battery cell 410 experiences thermal runaway, the emitted high-temperature and high-pressure medium can enter the second chamber 4022, reducing the risk of thermal runaway of adjacent pouch battery cells 410; and the housing assembly Component 401 can also reduce the range of movement and deformation of each pouch battery cell 410. The second surface 4102 of the pouch battery cell 410 is bonded to the housing 430, which can improve the positional stability of the pouch battery cell 410 within the battery cell assembly 400 and reduce the probability of short circuits or leakage caused by the movement of the pouch battery cell 410. In addition, the housing assembly 401 can also disperse external impact forces, reduce the risk of the pouch battery cell 410 being subjected to excessive impact forces, improve the service life of the pouch battery cell 410, improve the service life of the battery device 100, and thus improve the overall performance of the power device 1.

[0221] In some embodiments, the electrical device includes a vehicle, the vehicle includes a floor, the housing 430 includes a second opening 440, and the floor covers the second opening 440.

[0222] In the above technical solution, the electrical device includes a vehicle, the vehicle includes a floor, the box 430 includes a second opening 440, the floor covers the second opening 440, and the box 430 of the battery device 100 uses the vehicle's own floor as a box cover for sealing, which can reduce costs, improve space utilization, increase the capacity of the box 430, and increase the vehicle chassis height.

[0223] A battery device 100 according to a specific embodiment of the present application will now be described with reference to Figures 3 to 7.

[0224] The battery device 100 includes: a battery cell assembly 400, a housing 430 and a heat exchange plate. The housing 430 is provided with a second opening 440. The battery cell assembly 400 is installed in the housing through the second opening 440. At the same time, the vehicle floor cover closes to the second opening 440 to complete the sealing of the entire battery device 100.

[0225] The battery cell assembly 400 is placed inside the housing 430 and supported on a heat exchange plate at the bottom of the housing 430. The battery cell assembly 400 includes multiple housing assemblies 401 arranged sequentially along the thickness direction of the pouch battery cells 410. Each housing assembly 401 has a receiving cavity 402 and a partition plate 403 disposed within the receiving cavity 402. The partition plate 403 divides the receiving cavity 402 into a first chamber 4021 and a second chamber 4022 that are interconnected. Multiple pouch battery cells 410 are housed in the first chamber 4021. The second chamber 4022 is configured to contain the high-temperature and high-pressure medium discharged from the first chamber 4021. The housing assembly 401 includes a first housing 4011 and a second housing 4012. The first housing 4011 and / or the second housing 4012 have an F-shaped structure. The first housing 4011 and the second housing 4012 cooperate to form a receiving cavity 402. When the soft-pack battery cell 410 is installed in the housing, there is no need to deform the housing, which can improve the assembly accuracy of the battery cell assembly 400. After assembly, the housing assembly 401 has a first opening 404 at the position corresponding to the bottom plate of the box 430. The side of the soft-pack battery cell 410 near the first opening 404 is bonded and fixed to the box 430. The housing assembly 401 has a reinforcing part 450 at the position near the first opening 404. The reinforcing part 450 is formed by bending the housing of the housing assembly 401. The housing assembly 401 is inserted and engaged with the bottom plate of the box 430 through the reinforcing part 450.

[0226] Each housing assembly 401 has a cavity 402 that houses a plurality of pouch battery cells 410. Each pouch battery cell 410 includes a first surface 4101 facing each other along the thickness direction and a second surface 4102 along the width direction. Along the thickness direction of the pouch battery cell 410, the housing assemblies 401 corresponding to the first surfaces 4101 of any two adjacent pouch battery cells 410 at their ends that are close to each other can share a housing. The portion of the first housing 4011 of one housing assembly 401 that covers the first surface 4101 can share a housing with the portion of the second housing 4012 of the adjacent housing assembly 401 that covers the corresponding first surface 4101.

[0227] An adhesive is applied between the first surfaces 4101 of the multiple pouch battery cells 410 within each receiving cavity 402 and between the first surfaces 4101 and the corresponding housing assembly 401, so that the multiple pouch battery cells 410 and the housing assembly 401 are bonded together as a whole.

[0228] An adhesive-blocking structure 4103 is provided between the R-angles of adjacent soft-pack battery cells 410 located in the same receiving cavity 402, and the adhesive-blocking structure 4103 is connected to the bottom of the housing 430.

[0229] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, wherein, include: The housing has a base plate for supporting individual battery cells; The battery cell assembly includes: a housing assembly having a receiving cavity, the housing assembly including a partition plate disposed in the receiving cavity, the partition plate dividing the receiving cavity into a first chamber and a second chamber that are interconnected; and A single soft-pack battery cell is disposed in the first chamber; The second chamber is configured to contain the medium discharged from the first chamber, and the pouch cell is bonded to the housing.

2. The battery device according to claim 1, wherein, The partition plate is provided with a first pressure relief area, which is configured to connect the first chamber and the second chamber.

3. The battery device according to claim 2, wherein, The first pressure relief zone includes a through hole disposed in the partition plate, the through hole connecting the first chamber and the second chamber.

4. The battery device according to claim 2, wherein, The first pressure relief zone includes a weak portion disposed on the partition plate, the weak portion being configured to be destroyed under a preset pressure to connect the first chamber and the second chamber.

5. The battery device according to claim 4, wherein, The weak portion includes a groove provided on the partition plate, the groove being configured to tear under a preset pressure to connect the first chamber and the second chamber.

6. The battery device according to any one of claims 1-5, wherein, The first end of the partition plate is connected to the wall of the housing assembly, and the second end is spaced apart from the wall of the housing assembly to form a gap, which connects the first chamber and the second chamber.

7. The battery device according to any one of claims 1-5, wherein, The partition plate includes a first plate and a second plate, which are disposed opposite to each other and are respectively connected to the wall of the housing assembly, and a gap is formed between them, which connects the first chamber and the second chamber.

8. The battery device according to any one of claims 1-7, wherein, The housing assembly further includes a first housing and a second housing, the first housing and the second housing together forming the receiving cavity, and the partition plate is connected to the first housing and / or the second housing.

9. The battery device according to claim 8, wherein, The battery cell assembly includes a plurality of the pouch battery cells, each pouch battery cell including two oppositely arranged first surfaces and two oppositely arranged second surfaces, wherein the surface area of ​​the first surface is larger than that of the second surface; The first housing includes a first fixing part and a second fixing part, which are connected at an included angle. The first fixing part faces the first surface along a first direction and covers at least a portion of the first surface, and the second fixing part covers at least a portion of the second surface of the pouch battery cell along a second direction; The second housing includes a third fixing part disposed on the side of the second fixing part away from the first fixing part, and covering at least a portion of the first surface along the first direction.

10. The battery device according to claim 9, wherein, The first surface and the second surface of any of the pouch cell are connected by a transition portion.

11. The battery device according to claim 10, wherein, The transition section is an R-angle.

12. The battery device according to claim 11, wherein, An adhesive-blocking structure is provided between the radius (R) corners of any two adjacent pouch battery cells located within the same receiving cavity, and the adhesive-blocking structure is connected to the bottom of the housing.

13. The battery device according to claim 12, wherein, The adhesive-blocking structure is an adhesive-blocking strip.

14. The battery device according to any one of claims 9-13, wherein, The second fixing part is vertically connected to the first fixing part; the partition plate is vertically connected to the first fixing part and is spaced apart from the second fixing part along the second direction; The first fixing part, the second fixing part, the third fixing part, and the partition plate together enclose and form the second chamber; The first fixing part, the partition plate, and the third fixing part together enclose and form the first chamber.

15. The battery device according to any one of claims 9-14, wherein, The second housing further includes a fourth fixing part, and the third fixing part and the fourth fixing part are connected at an included angle; The fourth fixing part is disposed in conjunction with the second fixing part, and together they cover the second surface along the second direction.

16. The battery device according to claim 15, wherein, The projections of the second fixing part and the fourth fixing part along the second direction at least partially overlap.

17. The battery device according to claim 15 or 16, wherein, The second fixing part and the fourth fixing part are welded together on the side that is close to each other along the first direction.

18. The battery device according to any one of claims 8-17, wherein, The battery cell assembly includes multiple housing assemblies, which are arranged sequentially along a first direction, and each housing assembly has a soft-pack battery cell disposed within its receiving cavity.

19. The battery device according to claim 18, wherein, At least two adjacent housing assemblies share a portion of the housing.

20. The battery device according to claim 19, wherein, The pouch battery cell includes two first surfaces disposed opposite each other along the first direction. For any two adjacent housing assemblies, the portion of the first housing of one of them covering the first surface shares a housing with the portion of the second housing of the other covering the first surface.

21. The battery device according to any one of claims 1-20, wherein, The battery cell assembly includes a plurality of the pouch battery cells and an adhesive. Each pouch battery cell includes two first surfaces disposed opposite each other along a first direction. The first surfaces of the plurality of pouch battery cells are connected to each other and to the housing assembly by the adhesive.

22. The battery device according to any one of claims 1-21, wherein, The housing assembly is made of metal or plastic.

23. The battery device according to any one of claims 1-22, wherein, The soft-pack battery cell can be any one of lithium iron phosphate battery cell, ternary battery cell, and solid-state battery cell.

24. The battery device according to claim 23, wherein, The soft-pack battery cell is a lithium iron phosphate battery cell, and the ratio of the positive electrode active material, binder, and conductive agent in the positive electrode material of the soft-pack battery cell is 96:(1-3):(1-3); the soft-pack battery cell is a ternary battery cell, and the ratio of the positive electrode active material, binder, and conductive agent in the positive electrode material of the soft-pack battery cell is 96:(2-3):(1-2).

25. The battery device according to any one of claims 1-24, wherein, The housing assembly includes a first opening that communicates with the first chamber. A reinforcing portion is provided near the first opening, and the housing assembly is connected to the base plate through the reinforcing portion.

26. The battery device according to claim 25, wherein, The base plate is provided with a slot, and the reinforcing part is inserted into the slot.

27. The battery device according to claim 25 or 26, wherein, The battery device also includes a thermally conductive structural adhesive, and the side of the soft-pack battery cell closest to the first opening is bonded to the base plate by the thermally conductive structural adhesive.

28. The battery device according to claim 27, wherein, The base plate is a heat exchange plate, and the soft-pack battery cells are bonded to the heat exchange plate by the thermally conductive structural adhesive.

29. The battery device according to any one of claims 25-28, wherein, The reinforcing part is formed by bending the shell of the shell assembly.

30. The battery device according to claim 29, wherein, The reinforcing part is wavy.

31. The battery device according to any one of claims 25-28, wherein, The reinforcing portion is formed by locally thickening the shell of the shell assembly.

32. The battery device according to any one of claims 1-31, wherein, The battery device further includes an expansion beam connected to the base plate, and the housing assembly abuts against the expansion beam along a first direction.

33. An electrical appliance, wherein, Includes the battery device as described in any one of claims 1 to 32.

34. The electrical appliance according to claim 33, wherein, The electrical device includes a vehicle, the vehicle includes a floor, the housing includes a second opening, and the floor covers the second opening.

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