Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device. The battery device comprises a box body; the battery monomer assembly comprises: a housing assembly having an accommodating cavity and a partition plate arranged in the accommodating cavity, the partition plate dividing the accommodating cavity into a first chamber and a second chamber which can communicate with each other; the soft package battery monomer is arranged in the first cavity and is bonded with the box body; and the second cavity is configured to be capable of accommodating the medium discharged from the first cavity. According to the technical scheme, when a certain soft package battery monomer is subjected to thermal runaway, the discharged high-temperature and high-pressure medium can enter the second cavity, so that the risk of gathering in the first cavity is reduced, and the possibility of heat spreading is further reduced; and the shell assembly can also reduce the movement and deformation range of each soft package battery monomer, improve the stability of the position of the soft package battery monomer in the battery monomer assembly, and reduce the probability of short circuit or electric leakage caused by the movement of the soft package battery monomer.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Art

[0002] At present, most new energy vehicles use power batteries as energy storage and kinetic energy devices. Power batteries are also used in other types of vehicles. The reliability of power batteries has a relatively important impact on the vehicle's endurance and power performance. Therefore, improving battery reliability is a direction that needs to be focused on in the process of continuous improvement and innovation of batteries. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a battery device and an electrical device including the battery device, which can improve the reliability of the soft-pack battery cell and thus improve the reliability of the battery device.

[0004] In the first aspect, an embodiment of the present application provides a battery device, comprising: a box body, having a bottom plate for supporting a battery cell assembly; the battery cell assembly comprises a shell assembly and a soft-pack battery cell, the shell assembly having a accommodating cavity, the shell assembly comprising a partition plate arranged in the accommodating cavity, the partition plate dividing the accommodating cavity into a first chamber and a second chamber that can be interconnected; the soft-pack battery cell is arranged in the first chamber; wherein the second chamber is configured to accommodate a medium discharged from the first chamber, and the soft-pack battery cell is bonded to the box body.

[0005] In the above technical solution, on the one hand, the partition plate divides the accommodating cavity of the shell assembly into a first chamber and a second chamber which can be interconnected, so that when a soft-pack battery cell located in the same accommodating cavity has a thermal runaway, the discharged high-temperature and high-pressure medium can quickly enter the second chamber and will not accumulate in the first chamber, which can reduce the risk of heat spread between adjacent soft-pack battery cells in the same accommodating cavity; on the other hand, the shell assembly cover is arranged outside the soft-pack battery cell, and the excrement is collected through the second chamber, which can delay the spread of the excrement to the adjacent shell assembly to a certain extent, thereby further reducing the risk of heat spread between adjacent battery cell assemblies. Therefore, the reliability of the battery device can be effectively improved.

[0006] In addition, the shell assembly can also reduce the range of movement and deformation of each soft-pack battery cell. The soft-pack battery cell is bonded to the box body, which can not only improve the grouping efficiency, but also improve the stability of the position of the soft-pack battery cell in the battery cell assembly, and reduce the probability of short circuit or leakage caused by the movement of the soft-pack battery cell. In addition, the shell assembly can also disperse external impact force, reduce the risk of the soft-pack battery cell being subjected to excessive impact force, and increase the service life of the soft-pack battery cell.

[0007] In some embodiments, a first pressure relief area is provided on the separation plate, and the first pressure relief area is configured to communicate with the first chamber and the second chamber.

[0008] In the above technical solution, since the first pressure relief zone is provided on the partition plate, the first pressure relief zone can timely release the excessive pressure in the first chamber to the second chamber, thereby reducing the risk of explosion or rupture of the shell assembly due to excessive internal pressure in the accommodating cavity when the soft-pack battery cell has thermal runaway, thereby improving the stability of the battery cell assembly structure.

[0009] In some embodiments, the first pressure relief area includes a through hole disposed on the partition plate, and the through hole communicates with 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 penetrating the partition plate, 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 area includes a weak portion disposed on the separation plate, and the weak portion is configured to be broken 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 a weak part formed in the partition plate, stable pressure relief can be achieved when thermal runaway occurs, and no additional pressure relief components need to be introduced. This can not only reduce the number of components and assembly labor requirements, simplify the manufacturing process of the pressure relief structure, and reduce costs, but also reduce the space occupied by the first pressure relief zone and improve the energy density of the battery cell assembly.

[0013] In some embodiments, the weakened portion includes a score groove disposed on the partition plate, and the score groove is configured to be torn under a preset pressure to connect the first chamber and the second chamber.

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

[0015] In some embodiments, 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, and the gap connects 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. When thermal runaway occurs, 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 and easy to process, and stable pressure relief can be achieved.

[0017] In some embodiments, the partition plate includes a first plate and a second plate, the first plate and the second plate are arranged opposite to each other and are respectively connected to the wall of the shell assembly, and a gap is formed between the two, and the gap connects 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 relatively spaced apart and are respectively connected to the wall of the shell assembly. The gap formed between the two can allow the high-temperature and high-pressure medium in the first chamber to flow to the second chamber when thermal runaway occurs. The pressure relief structure has a simple molding method, is easy to process, and has stable and reliable pressure relief performance.

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

[0020] In the above technical solution, the shell assembly includes a first shell and a second shell, and the first shell and the second shell together form a accommodating cavity. The split shell structure can facilitate the assembly of the soft-pack battery cell into the shell without deforming the shell, thereby improving the assembly accuracy and efficiency; at the same time, the partition plate is connected to the first shell and / or the second shell, which can reduce the processing difficulty, and the setting method is flexible, which can improve the processing efficiency.

[0021] In some embodiments, a battery cell assembly includes a plurality of soft-pack battery cells, the soft-pack battery cells include two oppositely disposed first surfaces and two oppositely disposed second surfaces, the surface area of ​​the first surface is greater than that of the second surface; the first shell includes a first fixing portion and a second fixing portion, the first fixing portion and the second fixing portion are connected at an 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 soft-pack battery cell along a second direction; the second shell includes a third fixing portion, the third fixing portion is disposed on a side of the second fixing portion away from the first fixing portion, and covers at least a portion of the first surface along the first direction.

[0022] In the above technical solution, the first shell includes a first fixing portion and a second fixing portion, the first fixing portion covers at least a portion of the first surface along the first direction, and the second fixing portion covers the second surface of each soft-pack battery cell along the second direction, and the second shell includes a third fixing portion, which is arranged on a side of the second fixing portion away from the first fixing portion and covers at least a portion of the first surface along the first direction. The shell assembly as a whole presents a U-shaped structure, so that the soft-pack battery cell can be stably maintained in the accommodation space formed by the shell assembly, reducing the risk of displacement of the soft-pack 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 accommodation 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 surface and the second surface of any soft-pack battery cell are connected by a transition portion.

[0024] In the above technical solution, the first surface and the second surface of any soft-pack battery are connected via a transition portion, which can increase the connection strength and reduce the risk of cracking of the soft-pack battery single body shell.

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

[0026] In the above technical solution, the transition portion is an R angle, which is conducive to the processing and manufacturing of the soft-pack battery monomer shell, improves the shell's ability to resist cracking, and can improve the production efficiency of the soft-pack battery monomer.

[0027] In some embodiments, a glue blocking structure is provided between R corners of any two adjacent soft-pack battery cells in the same accommodating cavity, and the glue blocking structure is provided at the bottom of the box body.

[0028] In the above technical solution, a glue blocking structure is arranged between the R corners of any two adjacent soft-pack battery cells in the same accommodating cavity, which can prevent glue from overflowing to the R corner when the soft-pack battery cell is bonded to the box body, thereby reducing the risk of stress concentration at the R corner of the soft-pack battery cell.

[0029] In some embodiments, the glue blocking structure is a glue blocking strip.

[0030] In the above technical solution, the glue blocking structure is a glue blocking strip, which can be directly bonded to the bottom of the box body, 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 are jointly arranged to form the second chamber; the first fixing part, the partition plate and the third fixing part are jointly arranged to form 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 are jointly arranged to form the second chamber, and the first fixing part, the partition plate and the third fixing part are jointly arranged to form the first chamber. The partition plate and the second fixing part are arranged at intervals along the second direction, which can not only divide the first accommodating chamber and the second accommodating chamber, but also the second accommodating chamber does not need to be provided with an additional partition, so that the structure of the shell assembly is simpler and the processing efficiency is higher, which can save materials and reduce costs, and can also reduce the size of the entire battery cell assembly along the second direction, thereby improving the energy density of the battery cell assembly.

[0033] In some embodiments, the second shell further includes a fourth fixing portion, and the third fixing portion and the fourth fixing portion are connected at an angle; the fourth fixing portion and the second fixing portion are butt-jointedly arranged, and together cover the second surface along the second direction.

[0034] In the above technical solution, the second shell also includes a fourth fixing portion, the third fixing portion and the fourth fixing portion are connected at an angle to form an L-shaped structure, the fourth fixing portion and the second fixing portion are butt-jointed and jointly cover the second surface of the soft-pack battery cell along the second direction, so that the structure of the entire shell assembly is more compact, and the soft-pack battery cell in the accommodating cavity is not easily displaced. When subjected to external impact, the shell 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, 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 portion and the fourth fixing portion along the second direction at least partially overlap, which can reduce the risk of external foreign matter entering the first cavity through the second cavity and reduce the risk of short circuit or damage of the soft-pack battery cell.

[0037] In some embodiments, the second fixing portion and the fourth fixing portion are connected by welding at sides 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 and connected, which can make the shell assembly more compact and reduce the space occupied by the shell assembly, while preventing external foreign matter from entering the second cavity and 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 shell assemblies, the plurality of shell assemblies are arranged in sequence along a first direction, and a soft-pack battery cell is disposed in a receiving cavity of each shell assembly.

[0040] In the above technical solution, the battery cell assembly includes a plurality of shell assemblies arranged along a first direction, and a soft-pack battery cell is arranged in front of each shell assembly, which is beneficial to improving the assembly efficiency and assembly accuracy of the battery cell assembly; at the same time, the soft-pack battery cells in different accommodating cavities are separated by the shell assemblies, which can also reduce the risk of the soft-pack battery cells spreading to adjacent accommodating cavities during thermal runaway.

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

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

[0043] In some embodiments, the soft-pack battery cell includes two first surfaces arranged opposite to each other along a first direction, and any two adjacent shell components, the portion of the first shell covering the first surface of one and the portion of the second shell covering the first surface of the other share a shell.

[0044] In the above technical solution, the soft-pack battery cell includes a first surface arranged relatively to each other along a first direction, and any two adjacent shell assemblies, in which the portion of the first shell covering the first surface of one and the portion of the second shell covering the first surface of the other share a shell, can simplify the shell structure of the shell assembly, facilitate the processing and manufacturing of the shell assembly, improve processing efficiency, reduce processing costs, and also help to reduce the thickness of the shell assembly between the soft-pack battery cells in two adjacent accommodating cavities, which is beneficial to reducing 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 soft-pack battery cells and also includes an adhesive. The soft-pack battery cells include two first surfaces arranged opposite to each other along a first direction. The first surfaces of the plurality of soft-pack battery cells and the first surfaces and the shell assembly are connected to each other by the adhesive.

[0046] In the above technical solution, the battery cell assembly includes a plurality of soft-pack battery cells and also includes an adhesive. The soft-pack battery includes two first surfaces arranged opposite to each other along a first direction. The first surfaces of the plurality of soft-pack battery cells and the shell 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 impact, the impact force can be dispersed to the entire battery cell assembly, so that a single soft-pack battery cell is not easily deformed, thereby reducing the risk of the battery cell assembly.

[0047] In some embodiments, the material of the housing component is metal or plastic.

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

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

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

[0051] In some embodiments, the shell assembly includes a first opening, the first opening is communicated with the first chamber, a reinforcement portion is disposed at a position of the shell assembly close to the first opening, and the shell assembly is connected to the bottom plate through the reinforcement portion.

[0052] In the above technical solution, the shell assembly includes a first opening, the first opening is connected to the first chamber, and a reinforcement portion is provided at a position of the shell assembly near the first opening. The shell assembly is connected to the bottom plate through the reinforcement portion, so that the battery cell assembly and the box of the battery device can be connected as a whole, which can further improve the ability of the soft-pack battery cell to resist vibration and impact, and reduce the risk of deformation and displacement of the soft-pack battery cell. At the same time, the reinforcement portion can improve the strength of the shell assembly, so that the shell assembly is not easy to deform, and provide stable support for the soft-pack battery cell.

[0053] In some embodiments, the bottom plate is provided with a slot, and the reinforcing portion is inserted into the slot.

[0054] In the above technical solution, a slot is provided on the bottom plate, and the reinforcement part is inserted into the slot, which can improve the connection strength between the shell assembly and the bottom plate of the box body, and is not easily separated from the box body when subjected to vibration impact. The impact force can also be dispersed to the entire box body, so that the force is evenly applied to the shell assembly and it is not easy to deform. At the same time, the reinforcement part is inserted into the slot, which can reduce the size of the shell assembly along the second direction, which is beneficial to saving box space and improving space utilization.

[0055] In some embodiments, the battery device further includes a thermally conductive structural adhesive, and a side of the soft-pack battery cell close to the first opening is bonded to the bottom plate by the thermally conductive structural adhesive.

[0056] In the above technical solution, the battery device includes a thermally conductive structural adhesive, and the side of the soft-pack battery cell close to the first opening is bonded to the bottom plate by the thermally conductive structural adhesive. On the basis that the reinforcement portion of the shell assembly is fixed to the bottom plate through the slot, the soft-pack battery cell and the bottom plate are bonded by the thermally conductive structural adhesive, which can further improve the connection strength between the battery cell assembly and the box body and reduce the risk of displacement and deformation of the soft-pack battery cell. At the same time, the thermally conductive structural adhesive has a high thermal conductivity and can conduct the heat generated by the soft-pack battery cell to the bottom plate of the box body, which is beneficial to reduce the temperature of the soft-pack battery cell and reduce the risk of thermal runaway.

[0057] In some embodiments, the bottom plate is a heat exchange plate, and the soft-pack battery cells are bonded to the heat exchange plate by a heat-conductive structural adhesive.

[0058] In the above technical solution, the bottom plate of the box is integrated with the function of the heat exchange plate, which can improve the space utilization of the box. The soft-pack battery monomer is bonded to the heat exchange plate by a thermally conductive structural adhesive. A heat exchange medium flows in the heat exchange plate. The soft-pack battery monomer is bonded to the heat exchange plate by the thermally conductive structural adhesive, which can improve the heat exchange efficiency and further reduce the risk of thermal runaway of the soft-pack battery monomer.

[0059] In some embodiments, the reinforcement portion is formed by bending a shell of the shell assembly.

[0060] In the above technical solution, the reinforcement part is formed by bending the shell of the shell assembly, and the reinforcement part and the shell assembly are integrally formed, which is conducive to simplifying the processing technology, improving the production cycle, and will not introduce new parts, which is conducive to reducing production costs.

[0061] In some embodiments, the reinforcement portion is wavy in shape.

[0062] In the above technical solution, the reinforcement part is set to be wavy, which can further improve the shell strength of the shell assembly. The shell assembly is not easy to deform, and can provide stable support and protection for the soft-pack battery cell, reducing the risk of deformation and displacement of the soft-pack battery cell.

[0063] In some embodiments, the reinforcement is formed by a local thickening of the shell of the shell assembly.

[0064] In the above technical solution, the reinforcement part is formed by locally thickening the shell of the shell assembly, which can reduce the difficulty of processing the reinforcement part, facilitate production and manufacturing, and improve production efficiency.

[0065] In some embodiments, the battery device further includes an expansion beam connected to the bottom plate, and the shell assembly abuts against the expansion beam along the first direction.

[0066] In the above technical solution, the battery device also includes an expansion beam, which is connected to the bottom plate. The shell assembly abuts against the expansion beam along a first direction, which can reduce the number of components inside the box and improve the utilization rate of the internal space of the box. More battery cell assemblies can be accommodated, which is beneficial to improving the capacity of the battery device. The expansion beam abuts against the shell 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 of the shell assembly.

[0067] In a second aspect, the present application provides an electrical device, comprising: a battery device according to the first aspect of the present application.

[0068] In the above-mentioned embodiment, by setting the battery device of the first aspect, the battery cell assembly includes a shell assembly, and the shell assembly includes a partition plate. Since the partition plate divides the accommodating cavity of the shell assembly into a first chamber and a second chamber that can be interconnected, the soft-pack battery cell is arranged in the first chamber. When a certain soft-pack battery cell has a thermal runaway, the discharged high-temperature and high-pressure medium can enter the second chamber, thereby reducing the risk of thermal runaway of adjacent soft-pack battery cells; and the shell assembly can also reduce the activity and deformation range of each soft-pack battery cell. The soft-pack battery cell is bonded to the box body, which can improve the stability of the position of the soft-pack battery cell in the battery cell assembly and reduce the probability of short circuit or leakage caused by the movement of the soft-pack battery cell; in addition, the shell assembly can also disperse external impact force, reduce the risk of the soft-pack battery cell being subjected to excessive impact force, improve the service life of the soft-pack battery cell, and improve the service life of the battery device, thereby improving the overall performance of the electrical device.

[0069] In some embodiments, the electrical device includes a vehicle, the vehicle includes a floor, the box includes a second opening, and the floor covers the second opening.

[0070] In the above technical solution, the electrical device includes a vehicle, the vehicle includes a floor, the box includes a second opening, the floor cover is closed on the second opening, and the box of the battery device uses the vehicle's own floor as a box cover for sealing, which can reduce costs and improve space utilization, increase the capacity of the box and improve the height of the vehicle chassis.

[0071] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] Figure 1 is a schematic structural diagram of a vehicle according to an embodiment of the present application;

[0073] Figure 2 is a schematic structural diagram of a battery device according to an embodiment of the present application;

[0074] Figure 3 is a schematic structural diagram of a battery cell assembly according to some embodiments of the present application;

[0075] Figure 4 is a schematic structural diagram of a battery cell assembly according to other embodiments of the present application;

[0076] Figure 5 is based on Figure 3 An exploded view of a battery cell assembly is shown;

[0077] Figure 6 is based on Figure 4 An exploded view of a battery cell assembly is shown;

[0078] Figure 7 It is a schematic structural diagram of a battery cell assembly according to some other embodiments of the present application.

[0079] Reference numerals:

[0080] 1. Electric device; 100. Battery device; 200. Controller; 300. Motor; 400. Battery cell assembly; 401. Shell assembly; 402. Accommodation cavity; 403. Partition plate; 4031. First plate; 4032. Second plate; 4021. First chamber; 4022. Second chamber; 410. Soft-pack battery cell; 4033. Gap; 4011. First shell; 4012. Second shell; 4101. First surface; 4102. Second surface; 4103. Glue blocking structure; 4011a. First fixing part; 4011b. Second fixing part; 4012a. Third fixing part; 4012b. Fourth fixing part; 430. Box; 404. First opening; 450. Reinforcement part; 440. Second opening; X, first direction; Y, second direction. DETAILED DESCRIPTION

[0081] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0082] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0083] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0084] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0085] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0086] In the description of the embodiments of the present application, the term "plurality" refers to more than two (including two).

[0087] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0088] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0089] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include one or more battery cells. When there are multiple battery cells, the multiple battery cells are connected in series, in parallel or in mixed connection through a busbar component.

[0090] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, a battery cell assembly may be a battery module, and a battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, a battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0091] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0092] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0093] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0094] As an example, the box may include a first box and a second box. The first box and the second box are buckled together to form a closed space inside the box to accommodate the battery cell assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0095] As an example, the box body may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0096] As an example, the box body can be used as a part of the chassis structure of the vehicle. For example, the top cover of the box body can become at least a part of the floor of the vehicle, or the frame of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0097] In some embodiments, the battery device refers to an energy storage device, which includes a box body, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, and the like.

[0098] The battery cells mentioned in the embodiments of the present 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., which are not limited in the embodiments of the present application. The battery cells may be cylindrical, flat, rectangular or other shapes, etc., which are not limited in the embodiments of the present application. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, which are not limited in the embodiments of the present application.

[0099] Exemplarily, a battery cell may generally include a shell, a battery cell assembly and an electrolyte, wherein the shell is used to contain the battery cell assembly and the electrolyte, and the shell is provided with at least one positive electrode column and at least one negative electrode column. The battery cell assembly includes one or more electrode assemblies, and the electrode assembly is formed by stacking or winding a positive electrode sheet, a negative electrode sheet and a separator.

[0100] Among them, the positive electrode sheet can generally include a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer is directly or indirectly coated on the positive electrode current collector, the positive electrode current collector not coated with the positive electrode active material layer protrudes from the positive electrode current collector coated with the positive electrode active material layer, the positive electrode current collector not coated with the positive electrode active material layer serves as a positive electrode tab sheet, and a plurality of positive electrode tab sheets are stacked together and electrically connected to the positive electrode column. Exemplarily, the plurality of stacked positive electrode tab sheets can be directly welded to the positive electrode column to form an electrical connection; or, the battery cell assembly can also include a positive electrode adapter sheet, the plurality of stacked positive electrode tab sheets are welded to one end of the positive electrode adapter sheet, and the other end of the positive electrode adapter sheet is welded to the positive electrode column, so that the positive electrode tab sheet is electrically connected to the positive electrode column.

[0101] The negative electrode sheet can generally include a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer is directly or indirectly coated on the negative electrode current collector, the negative electrode current collector not coated with the negative electrode active material layer protrudes from the negative electrode current collector coated with the negative electrode active material layer, the negative electrode current collector not coated with the negative electrode active material layer serves as a negative electrode tab sheet, and a plurality of negative electrode tab sheets are stacked together and electrically connected to the negative electrode column. Exemplarily, a plurality of negative electrode tab sheets stacked together can be directly welded to the negative electrode column to form an electrical connection; or, the battery cell assembly can also include a negative electrode adapter sheet, a plurality of negative electrode tab sheets stacked together are welded to one end of the negative electrode adapter sheet, and the other end of the negative electrode adapter sheet is welded to the negative electrode column, so that the negative electrode tab sheet is electrically connected to the negative electrode column. The material of the separator is not limited, for example, it can be polypropylene or polyethylene.

[0102] At the same time, battery cells mainly rely on the movement of metal ions between the positive electrode and the negative electrode to work. Taking lithium-ion batteries as an example, the material of the positive electrode current collector can be aluminum, the material of the positive electrode active material layer can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc., the material of the negative electrode current collector can be copper, and the material of the negative electrode active material layer can be carbon or silicon, etc. During the charge and discharge process, Li+ is embedded and de-embedded back and forth between the two electrodes: when charging, Li+ is de-embedded from the positive electrode, embedded in the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge.

[0103] The technical solutions described in the embodiments of the present application are applicable to various electrical devices that use battery packs and battery devices, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0104] In recent years, new energy vehicles have developed by leaps and bounds. In the field of electric vehicles, battery devices, as the power source of electric vehicles, play an irreplaceable and important role. Among them, battery devices, as core components of new energy vehicles, have high requirements in terms of energy density and reliability.

[0105] Since the soft-pack battery cell uses an aluminum-plastic film to wrap the electrode assembly and electrolyte, the aluminum-plastic film is light in weight and can significantly reduce the weight of the battery device and improve the energy density of the battery device.

[0106] However, in the battery device of the related art, when soft-pack battery cells are used, due to the low strength of the aluminum-plastic film, when multiple soft-pack battery cells are arranged in a box, the soft-pack battery cells are easily squeezed and deformed against each other, resulting in a greater risk of short circuit. In addition, when thermal runaway occurs in a certain soft-pack battery cell, the thermal runaway gas is easy to spread within the battery device, which can easily cause the risk of thermal runaway of the remaining soft-pack battery cells in the battery device.

[0107] Based on the above considerations, in order to reduce the mutual squeezing between soft-pack battery cells, improve the ability of soft-pack battery cells to resist external impacts, and reduce the risk of thermal runaway spreading between soft-pack batteries, the present application designs a battery cell assembly, the battery cell assembly includes: a shell assembly, having a accommodating cavity, the shell assembly includes a partition plate arranged in the accommodating cavity, the partition plate divides the accommodating cavity into a first cavity and a second cavity that can be interconnected; a soft-pack battery cell, arranged in the first cavity; wherein the second cavity is configured to accommodate the medium discharged from the first cavity, and since the partition plate divides the accommodating cavity of the shell assembly into a first cavity that can be interconnected The soft-pack battery cell is arranged in the first chamber. When a soft-pack battery cell has thermal runaway, the discharged high-temperature and high-pressure medium can enter the second chamber, reducing the risk of thermal runaway of adjacent soft-pack battery cells. The shell assembly can also reduce the range of movement and deformation of each soft-pack battery cell, improve the stability of the position of the soft-pack battery cell in the battery cell assembly, and reduce the probability of short circuit or leakage caused by the movement of the soft-pack battery cell. In addition, the shell assembly can also disperse external impact force, reduce the risk of the soft-pack battery cell being subjected to excessive impact force, and improve the service life of the soft-pack battery cell.

[0108] The embodiment of the present application provides an electric device using the battery pack or battery device disclosed herein as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0109] For the convenience of description, the following embodiments take the electric device 1 as a vehicle as an example to introduce the structure of the battery device 100 and the battery cells of the present application in detail.

[0110] Please refer to Figure 1 , Figure 1The power device 1 provided for some embodiments of the present application is a structural schematic diagram of a vehicle. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. The vehicle is provided with a battery device 100, and the battery device 100 can be arranged at the bottom, head or tail of the vehicle. The battery device 100 can be used for powering the vehicle, for example, the battery device 100 can be used as an operating power source for the vehicle. The vehicle may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for the starting, navigation and working power requirements of the vehicle during driving. In some embodiments of the present application, the battery device 100 can be used not only as the operating power source of the vehicle, but also as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0111] Please refer to Figure 2 , Figure 2 The schematic diagram of the structure of the battery device 100 provided in some embodiments of the present application. The battery device 100 includes a box body 430 and a battery cell assembly 400. The box body 430 is used to provide an assembly space for the battery cell assembly 400. The battery cell assembly 400 is accommodated in the box body 430.

[0112] Reference below Figure 3-Figure 7 A battery cell assembly 400 according to an embodiment of the first aspect of the present application is described. Figure 3 is a schematic structural diagram of a battery cell assembly 400 according to some embodiments of the present application; Figure 4 is a schematic structural diagram of a battery cell assembly 400 according to some other embodiments of the present application; Figure 5 is based on Figure 3 An exploded view of a battery cell assembly 400 is shown; Figure 6 is based on Figure 4 The exploded view of the battery cell assembly 400 is shown. Figure 7 4 is a schematic structural diagram of a battery cell assembly 400 according to some other embodiments of the present application.

[0113] The present application embodiment provides a battery device 100 including a box body 430 having a bottom plate for carrying a battery cell assembly 400, the battery cell assembly 400, such as Figure 3-Figure 7 As shown, the battery cell assembly 400 includes: a shell assembly 401, having a accommodating cavity 402, the shell assembly 401 includes a partition plate 403 arranged in the accommodating cavity 402, the partition plate 403 divides the accommodating cavity 402 into a first chamber 4021 and a second chamber 4022 that can be interconnected, and a soft-pack battery cell 410 is arranged in the first chamber 4021; wherein the second chamber 4022 is configured to accommodate the medium discharged from the first chamber 4021, and the soft-pack battery cell 410 is bonded to the box body 430.

[0114] In some embodiments, the soft-pack battery cell 410 includes a film shell and an electrode assembly and an electrolyte wrapped in the film shell, wherein the film shell may be an aluminum-plastic film, and the electrode assembly includes a stacked positive electrode sheet, a negative electrode sheet, and a separator.

[0115] The soft-pack battery cell 410 can be bonded to the bottom of the box body 430 , which is beneficial to maintaining the position stability of the soft-pack battery cell 410 and reducing the risk of short circuit of the soft-pack battery cell 410 .

[0116] The number of the soft-pack battery cells 410 in the battery cell assembly 400 may be one or more. When the number of the soft-pack battery cells 410 is more than one, the number may be two, four, six, seven, ten, fifteen, twenty, thirty or more.

[0117] The housing assembly 401 has a receiving cavity 402 that can receive the soft-pack battery cell 410 , so that the structure of the battery cell assembly 400 is more compact, which is beneficial to improving the energy density of the battery cell assembly 400 .

[0118] The partition plate 403 is a plate-like structure, which divides the accommodating chamber 402 into a first chamber 4021 and a second chamber 4022 which 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 has thermal runaway, the discharged high-temperature and high-pressure medium can flow into the second chamber 4022 in time, reducing the risk of thermal runaway spreading to adjacent soft-pack batteries, and also reducing the possibility of explosion or deformation due to excessive air pressure inside the shell assembly 401.

[0119] In the above technical solution, on the one hand, since the partition plate 403 divides the accommodating cavity 402 of the shell component 401 into a first chamber 4021 and a second chamber 4022 which can communicate with each other, when the soft-pack battery monomer 410 located in the same first chamber 4021 has thermal runaway, the discharged high-temperature and high-pressure medium can quickly enter the second chamber 4022 and will not gather in the first chamber 4021, which can reduce the risk of heat spread between adjacent soft-pack battery monomers 410 in the same first chamber 4021; on the other hand, the shell component 401 is covered outside the soft-pack battery monomer 410, and the excrement is collected through the second chamber 4022, which can delay the spread of the excrement to the adjacent shell component 401 to a certain extent, thereby further The shell assembly 401 can further reduce the risk of heat spread between the soft-pack battery cells 410 in adjacent accommodating cavities 402, thereby effectively improving the reliability of the battery device 100; and the shell assembly 401 can also reduce the range of movement and deformation of each soft-pack battery cell 410. The soft-pack battery cell 410 is bonded to the box body 430, which can not only improve the grouping efficiency of the battery cell assembly 400, but also improve the stability of the position of the soft-pack battery cell 410 in the battery cell assembly 400, and reduce the probability of short circuit or leakage caused by the movement of the soft-pack battery cell 410; in addition, the shell assembly 401 can also disperse external impact force, reduce the risk of the soft-pack battery cell 410 being subjected to excessive impact force, and improve the service life of the soft-pack battery cell 410.

[0120] In some embodiments of the present application, a first pressure relief area is provided on the partition plate 403 , and the first pressure relief area is configured to communicate with the first chamber 4021 and the second chamber 4022 .

[0121] 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 portion.

[0122] During the operation of the battery cell assembly 400, if the soft-pack battery cell 410 in the first chamber 4021 undergoes 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 area, thereby releasing the excessive pressure in the first chamber 4021 and reducing the risk of explosion or deformation of the shell assembly 401 due to excessive internal pressure, which is beneficial to improving the stability of the battery cell assembly 400.

[0123] In the above technical solution, since a first pressure relief zone is provided on the partition plate 403, the first pressure relief zone can timely release the excessive pressure in the first chamber 4021 to the second chamber 4022, thereby reducing the risk of explosion or rupture of the shell assembly 401 due to excessive internal pressure in the accommodating cavity 402 when the soft-pack battery cell 410 has thermal runaway, thereby improving the stability of the battery cell assembly 400 structure.

[0124] In some embodiments, the first pressure relief area includes a through hole disposed on the partition plate 403 , and the through hole connects the first chamber 4021 and the second chamber 4022 .

[0125] It should be noted that by controlling the size and number of the pressure relief holes, the pressure relief threshold can be accurately set, that is, the preset pressure of the first pressure relief zone can be accurately set, and since the cross-sectional area of ​​the pressure relief holes is constant, a stable pressure relief rate can be achieved.

[0126] In the above technical solution, since the first pressure relief zone is formed as a through hole penetrating the partition plate 403, 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.

[0127] In some embodiments, the first pressure relief area includes a weak portion disposed on the partition plate 403 , and the weak portion is configured to be broken under a preset pressure to connect the first chamber 4021 and the second chamber 4022 .

[0128] The weak portion refers to a local specific area on the partition plate 403 , where the strength of the specific area is lower than the strength of other areas of the partition plate 403 due to the combined influence of material properties, geometric shape, size or other factors.

[0129] When the battery cell assembly 400 is operating normally, the weak portion can maintain the structural integrity of the partition plate 403. However, when subjected to external or internal forces exceeding a certain limit (such as a preset pressure), the weak portion deforms, ruptures or fails earlier than other areas of the partition plate 403, thereby achieving connectivity between the first chamber 4021 and the second chamber 4022 to achieve pressure relief.

[0130] 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 structural weak area may be formed with a weakened hole or a weakened groove.

[0131] In the above technical solution, since the first pressure relief zone is a weak portion formed in the partition plate 403, stable pressure relief can be achieved when thermal runaway occurs, and no additional pressure relief components need to be introduced. This can not only reduce the number of components and assembly labor, simplify the manufacturing process of the pressure relief structure, and reduce costs, but also reduce the space occupied by the first pressure relief zone and improve the energy density of the battery cell assembly 400.

[0132] In some embodiments, the weak portion includes a notch provided on the partition plate 403 , and the notch is configured to be torn under a preset pressure to connect the first chamber 4021 and the second chamber 4022 .

[0133] The notches can generate stress concentration in the structural weak area. When the pressure in the first chamber 4021 increases, the stress will be accumulated preferentially in the notched area, so that the area can be accurately ruptured or deformed under the preset pressure, thereby achieving pressure relief. In this way, the rupture direction of the structural weak area can be guided, the pressure relief area of ​​the structural weak area after rupture can be increased, and the speed and efficiency of pressure relief can be improved.

[0134] It should be noted that by precisely controlling the depth, width and shape of the notch, the structural strength of the weak portion can be adjusted, and the pressure threshold for pressure relief can be flexibly set according to different soft-pack battery cells 410 .

[0135] In the above technical solution, since the weak portion may be a notched groove formed on the partition plate 403, the notched groove may guide the rupture direction of the first pressure relief zone when thermal runaway occurs. According to the setting position of the notched groove, the pressure relief position and the size of the pressure relief area after the rupture of the first pressure relief zone may be flexibly controlled, thereby improving the speed and efficiency of the pressure relief.

[0136] In some embodiments, the first end of the partition plate 403 is connected to the wall of the shell assembly 401 , and the second end is spaced apart from the wall of the shell assembly 401 to form a gap, and the gap connects the first chamber 4021 and the second chamber 4022 .

[0137] The first end of the partition plate 403 is connected to the wall of the shell assembly 401, and the second end is spaced apart from the wall of the shell 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.

[0138] In the above technical solution, the first end of the partition plate 403 is connected to the wall of the shell assembly 401, and the second end is spaced apart from the wall of the shell assembly 401 to form a gap. When thermal runaway occurs, 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 and easy to process, and stable pressure relief can be achieved.

[0139] In some embodiments, the partition plate 403 includes a first plate 4031 and a second plate 4032 , which are arranged opposite to each other and are respectively connected to the wall of the shell assembly 401 , and a gap 4033 is formed therebetween, and the gap 4033 connects the first chamber 4021 and the second chamber 4022 .

[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 arranged opposite to each other and are respectively connected to the wall of the shell assembly 401, and a gap 4033 is formed between the two. The first plate 4031 and the second plate 4032 may be butt-jointed 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 smaller than the sum of the thickness dimensions of the soft-pack battery cell 410 in the accommodating cavity 402. Alternatively, the first plate 4031 and the second plate 4032 are arranged opposite to each other along the thickness direction of the soft-pack battery cell 410, and the two are 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 cell 410 in the accommodating cavity 402.

[0141] 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 relatively spaced apart and are respectively connected to the wall of the shell assembly 401. The gap 4033 formed therebetween can allow the high-temperature and high-pressure medium in the first chamber 4021 to flow to the second chamber 4022 when thermal runaway occurs. The pressure relief structure has a simple molding method, is easy to process, and has stable and reliable pressure relief performance.

[0142] 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 form a receiving cavity 402 , and the partition plate 403 is connected to the first housing 4011 and / or the second housing 4012 .

[0143] The shell assembly 401 includes a first shell 4011 and a second shell 4012. The first shell 4011 and the second shell 4012 together form a accommodating cavity 402. The partition plate 403 is connected to the first shell 4011 and / or the second shell 4012. The first shell 4011 and / or the second shell 4012 are in an F-shaped structure. When the battery cell assembly 400 is assembled, the soft-pack battery cell 410 can be assembled through the open shell of the F-shaped shell. When installing multiple soft-pack battery cells 410, there is no need to deform the shell, which can improve the installation accuracy and efficiency of the battery cell group. In addition, according to the number, size and size of the soft-pack battery cells 410, the size of the first shell 4011 or the second shell 4012 can be flexibly adjusted to adapt to different types of battery cell groups.

[0144] In the above technical solution, the shell assembly 401 includes a first shell 4011 and a second shell 4012, and the first shell 4011 and the second shell 4012 together form a accommodating cavity 402. The split shell structure can facilitate the soft-pack battery cell 410 to be assembled into the shell without deforming the shell, thereby improving the assembly accuracy and efficiency; at the same time, the partition plate 403 is connected to the first shell 4011 and / or the second shell 4012, which can reduce the processing difficulty, and the setting method is flexible, which can improve the processing efficiency.

[0145] In some embodiments, the battery cell assembly 400 includes a plurality of soft-pack battery cells 410, the soft-pack battery cells 410 include two oppositely disposed first surfaces 4101 and two oppositely disposed second surfaces 4102, the surface area of ​​the first surface 4101 is larger than the second surface 4102; the first shell 4011 includes a first fixing portion 4011a and a second fixing portion 4011b, the first fixing portion 4011a and the second fixing portion 4011b are connected at an 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 soft-pack battery cell 410 along a second direction Y; the second shell 4012 includes a third fixing portion 4012a, the third fixing portion 4012a is disposed on a side of the second fixing portion 4011b away from the first fixing portion 4011a, and covers at least a portion of the first surface 4101 along the first direction X.

[0146] The soft-pack battery cell 410 may be cylindrical, square or pouch-shaped according to its molding process. Here, taking the pouch-shaped soft-pack battery cell 410 as an example, the first direction X refers to the thickness direction of the soft-pack battery cell 410, the second direction Y refers to the width direction of the soft-pack battery cell 410, the first surface 4101 refers to the surface relatively arranged along the thickness direction of the soft-pack battery cell 410, and is also the surface with the largest surface area of ​​a soft-pack battery cell 410; the second surface 4102 refers to the surface relatively arranged along the width direction of the soft-pack battery cell 410, the first surface 4101 and the second surface 4102 may be connected by an R angle, and the first shell 4011 includes a first fixing portion 4011a and a second fixing portion 4011b , the two are connected to form an L-shaped structure, the first fixing portion 4011a is a plate-like structure, extending along the width direction of the soft-pack battery cell 410, and the second fixing portion 4011b is a plate-like structure, extending along the thickness direction of the soft-pack battery cell 410; the second shell 4012 includes a third fixing portion 4012a, the third fixing portion 4012a is arranged on a side of the second fixing portion 4011b away from the first fixing portion 4011a, the third fixing portion 4012a is a plate-like structure extending along the width direction of the soft-pack battery cell 410, the first fixing portion 4011a, the second fixing portion 4011b and the third fixing portion 4012a cooperate to form a U-shaped shell structure, and the partition plate 403 can be connected to the first fixing portion 4011a and / or the third fixing portion 4012a.

[0147] In the above technical solution, the first shell 4011 includes a first fixing portion 4011a and a second fixing portion 4011b, the first fixing portion 4011a covers at least a portion of the first surface 4101 along the first direction X, and the second fixing portion 4011b covers the second surface 4102 of each soft-pack battery cell 410 along the second direction Y. The second shell 4012 includes a third fixing portion 4012a, which is arranged on a side of the second fixing portion 4011b away from the first fixing portion 4011a, and covers at least a portion of the first surface 4101 along the first direction X. The shell assembly 401 presents a U-shaped structure as a whole, so that the soft-pack battery cell 410 can be stably maintained in the accommodating space formed by the shell assembly 401, reducing the risk of displacement of the soft-pack 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.

[0148] In some embodiments, the first surface 4101 and the second surface 4102 of any soft-pack battery cell 410 are connected by a transition portion.

[0149] Since the shell of the soft-pack battery cell 410 is usually an aluminum-plastic film, the shell strength is insufficient. In order to reduce the risk of shell cracking during molding, a transition portion is required to connect the first surface 4101 and the second surface 4102.

[0150] In the above technical solution, the first surface 4101 and the second surface 4102 of any soft-pack battery cell 410 are connected via a transition portion, which can increase the connection strength and reduce the risk of cracking of the shell of the soft-pack battery cell 410 .

[0151] In some embodiments, the transition portion is an R angle.

[0152] In the above technical solution, the transition portion is an R angle, which is beneficial to the processing and manufacturing of the shell of the soft-pack battery cell 410, improves the ability of the shell to resist cracking, and can improve the production efficiency of the soft-pack battery cell 410.

[0153] In some embodiments, a glue blocking structure 4103 is disposed between R corners of any two adjacent soft-pack battery cells 410 located in the same accommodating cavity 402 , and the glue blocking structure 4103 is disposed at the bottom of the box body 430 .

[0154] Optionally, in some embodiments, a glue blocking structure 4103 is provided between the R corners of the soft-pack battery cells 410 on both sides along the first direction X in the same accommodating cavity 402 and the shell assembly 401 .

[0155] Since there is a first opening 404 on one side of the shell assembly 401 close to the bottom of the box body 430, the side of the soft-pack battery cell 410 close to the first opening 404 needs to be bonded to the bottom of the box body 430. In order to ensure the bonding area and avoid stress concentration in the R corner area after the glue is cured, it is necessary to set a glue blocking structure 4103 between the R corners of two adjacent soft-pack battery cells 410 and between the R corner and the shell assembly 401 to reduce the risk of glue overflow and reduce the risk of stress concentration in the R corner area.

[0156] The rubber blocking structure 4103 may be a boss provided at the bottom of the box body 430 , or a rubber blocking strip, etc.

[0157] In the above technical solution, a glue blocking structure 4103 is arranged between the R corners of any two adjacent soft-pack battery cells 410 in the same accommodating cavity 402, which can prevent glue from overflowing to the R corner when the soft-pack battery cell 410 is bonded to the box body 430, thereby reducing the risk of stress concentration at the R corner of the soft-pack battery cell 410.

[0158] In some embodiments, the glue blocking structure is a glue blocking strip.

[0159] In the above technical solution, the glue blocking structure is a glue blocking strip, which can be directly bonded to the bottom of the box body 430, and has a simple structure, convenient installation and high reliability.

[0160] In some embodiments, the second fixed portion 4011b is vertically connected to the first fixed portion 4011a; the partition plate 403 is vertically connected to the first fixed portion 4011a, and is spaced apart from the second fixed portion 4011b along the second direction Y; the first fixed portion 4011a, the second fixed portion 4011b, the third fixed portion 4012a and the partition plate 403 are jointly arranged to form the second chamber 4022; the first fixed portion 4011a, the partition plate 403 and the third fixed portion 4012a are jointly arranged to form the first chamber 4021.

[0161] The partition plate 403 separates the accommodating cavity 402 and cooperates with the first fixing portion 4011a, the second fixing portion 4011b and the third fixing portion 4012a to form a first chamber 4021 and a 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 shell assembly 401 does not need to be provided with a separate isolation piece to form the exhaust space, which can reduce the number of parts of the shell assembly 401, save materials, simplify the processing technology, and also reduce the space occupied by the shell assembly 401 along the width direction of the soft-pack battery cell 410.

[0162] In the above technical solution, the first fixing portion 4011a, the second fixing portion 4011b, the third fixing portion 4012a and the partition plate 403 are jointly arranged to form the second chamber 4022, and the first fixing portion 4011a, the partition plate 403 and the third fixing portion 4012a are jointly arranged to form the first chamber 4021. The partition plate 403 and the second fixing portion 4011b are arranged at intervals along the second direction Y, which can not only divide the first accommodating chamber 402 and the second accommodating chamber 402, but also the second accommodating chamber 402 does not need to be provided with an additional partition, so that the structure of the shell assembly 401 is simpler and the processing efficiency is higher, which can save materials and reduce costs, and can also reduce the size of the entire battery cell assembly 400 along the second direction Y, thereby improving the energy density of the battery cell assembly 400.

[0163] In some embodiments, the second shell 4012 further includes a fourth fixing portion 4012b, and the third fixing portion 4012a and the fourth fixing portion 4012b are connected at an angle; the fourth fixing portion 4012b is docked with the second fixing portion 4011b and together covers the second surface 4102 along the second direction Y.

[0164] The second shell 4012 also includes a fourth fixing portion 4012b, which is a plate-like structure and extends along the thickness direction of the soft-pack battery cell 410. The third fixing portion 4012a and the fourth fixing portion 4012b are connected to form an L-shaped structure. The first shell 4011 and the second shell 4012 are relatively arranged along the thickness direction of the soft-pack battery cell 410. The second fixing portion 4011b and the fourth fixing portion 4012b are butt-jointed. 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, thereby reducing the possibility of external foreign matter entering the battery cell assembly 400, thereby reducing the risk of short circuit or damage of the soft-pack battery cell 410.

[0165] In the above technical solution, the second shell 4012 also includes a fourth fixing portion 4012b, the third fixing portion 4012a and the fourth fixing portion 4012b are connected at an angle to form an L-shaped structure, the fourth fixing portion 4012b and the second fixing portion 4011b are butt-jointed and jointly cover the second surface 4102 of the soft-pack battery cell 410 along the second direction Y, so that the structure of the entire shell assembly 401 is more compact, and the soft-pack battery cell 410 in the accommodating cavity 402 is not easy to be displaced. When subjected to external impact, the shell assembly 401 can stably support the soft-pack battery cell 410, reduce the possibility of deformation of the soft-pack battery cell 410, and can also reduce the possibility of external foreign matter entering the battery cell assembly 400, and reduce the risk of short circuit or damage of the soft-pack battery cell 410.

[0166] In some embodiments, projections of the second fixing portion 4011b and the fourth fixing portion 4012b along the second direction Y at least partially overlap.

[0167] The second fixing portion 4011b and the fourth fixing portion 4012b extend relatively to each other along the first direction X and are not located in the same plane. The projections of the second fixing portion 4011b and the fourth fixing portion 4012b along the second direction Y at least partially overlap, and the two can be connected by welding, clamping or riveting.

[0168] In the above technical solution, the projections of the second fixing portion 4011b and the fourth fixing portion 4012b along the second direction Y at least partially overlap, which can reduce the risk of external foreign matter entering the first cavity 4021 through the second cavity 4022 and reduce the risk of short circuit or damage of the soft-pack battery cell 410.

[0169] In some embodiments, the second fixing portion 4011 b and the fourth fixing portion 4012 b are connected by welding at sides close to each other along the first direction X.

[0170] When the two are in the same plane, the sides of the two that are close to each other along the first direction X can be welded and connected into one body.

[0171] In the above technical solution, the second fixing portion 4011b and the fourth fixing portion 4012b are located in the same plane and are welded together, which can make the shell assembly 401 more compact, reduce the space occupied by the shell assembly 401 along the first direction X and the second direction Y, and prevent external foreign matter from entering the second chamber 4022, thereby reducing the risk of short circuit or damage to the soft-pack battery cell 410.

[0172] In some embodiments, the battery cell assembly 400 includes a plurality of shell assemblies 401 , which are arranged in sequence along the first direction X, and a soft-pack battery cell 410 is disposed in the receiving cavity 402 of each shell assembly 401 .

[0173] The battery cell assembly 400 includes a plurality of shell assemblies 401 sequentially arranged along the thickness direction of the soft-pack battery cell 410 , and a soft-pack battery cell 410 is disposed in the accommodating cavity 402 of each shell assembly 401 , which can improve the grouping efficiency of the battery cell assembly 400 .

[0174] At the same time, multiple shell components 401 form multiple accommodating cavities 402 to respectively accommodate multiple soft-pack battery cells 410. When thermal runaway occurs in a soft-pack battery cell 410 in one of the accommodating cavities 402, the thermal runaway is not easily transmitted to the soft-pack battery cell 410 in the accommodating cavity 402 of the adjacent shell component 401 due to the separation and blocking of the shell component 401, which can reduce the risk of heat spread, improve the stability of the battery cell assembly 400, and thus improve the life of the battery device.

[0175] The multiple shell components 401 are connected to each other to form a whole, which can improve the deformation resistance of the entire battery cell component 400 when subjected to external impact and reduce the risk of deformation and damage of the soft-pack battery cell 410.

[0176] In the above technical solution, the battery cell assembly 400 includes multiple shell assemblies 401, and a soft-pack battery cell 410 is arranged in the accommodating cavity 402 of each shell assembly 401, which can further improve the grouping efficiency of the battery cell assembly 400. At the same time, multiple soft-pack battery cells 410 are dispersedly accommodated in the accommodating cavities 402 of different shell assemblies 401. When thermal runaway occurs in the soft-pack battery cell 410 in one of the accommodating cavities 402, the shell assembly 401 can prevent the thermal runaway from spreading to the soft-pack battery cell 410 in the adjacent accommodating cavity 402, thereby reducing the risk of thermal diffusion of the battery cell assembly 400.

[0177] In some embodiments, at least two adjacent housing components 401 share a portion of the housing.

[0178] The battery cell group includes a plurality of shell assemblies 401 arranged in sequence along the thickness direction of the soft-pack battery cell 410. At least two adjacent shell assemblies 401 share part of the shell, which can save materials and reduce the manufacturing cost of the shell assembly 401. The shared shell can also reduce the volume of the battery cell assembly 400, reduce the space occupied by the box 430 of the battery device, and improve the volume utilization rate of the space of the box 430.

[0179] In the above technical solution, at least two adjacent shell components 401 share part of the shell, which can save materials and reduce production costs. At the same time, the shared shell can reduce the space occupied by the shell component 401 in the battery box 430, improve the battery energy density, and also help to improve the assembly efficiency of the battery cell component 400.

[0180] In some embodiments, the soft-pack battery cell 410 includes two first surfaces 4101 arranged opposite to each other along a first direction X, and any two adjacent shell components 401, one of which has a first shell 4011 covering the portion of the first surface 4101 and the other of which has a second shell 4012 covering the portion of the first surface 4101 share a shell.

[0181] Any two adjacent shell assemblies 401, wherein the first shell 4011 of one covers a portion of the first surface 4101 of the soft-pack battery cell 410 in the corresponding accommodating cavity 402 along the thickness direction of the soft-pack battery cell 410, and the second shell 4012 of the other covers a portion of the first surface 4101 of the soft-pack battery cell 410 in the corresponding accommodating cavity 402 along the thickness direction X of the soft-pack battery cell 410, share a shell.

[0182] Multiple soft-pack battery cells 410 are dispersedly arranged in the accommodating cavities 402 of multiple shell components 401. Along the thickness direction of the soft-pack battery cells 410, the first shell 4011 of any shell component 401 covers the first surface 4101 in the corresponding accommodating cavity 402, and the second shell 4012 of another shell component 401 covers the first surface 4101 in the corresponding accommodating cavity 402. The first shell 4011 of one shell component 401 can serve as the second shell 4012 of another shell component 401. Similarly, the second shell 4012 of another shell component 401 can serve as the first shell 4011 of one shell component 401 to realize the function of a shared shell.

[0183] In some embodiments, any two adjacent accommodating cavities 402 respectively accommodate multiple soft-pack battery cells 410. Along the thickness direction of the soft-pack battery cell 410, the shell components 401 corresponding to the two first surfaces 4101 close to each other of the two adjacent accommodating cavities 402 can share a shell. For example, the first surface 4101 of the soft-pack battery cell 410 at the end along the thickness direction of one of the accommodating cavities 402 is the surface facing the opening of the first shell 4011, and the first surface 4101 of the soft-pack battery cell 410 at the end along the thickness direction of the other corresponding accommodating cavity 402 can be the surface away from the opening of the corresponding first shell 4011, and vice versa. The shell of the shell components 401 corresponding to the two first surfaces 4101 can share a shell.

[0184] In the above technical solution, the soft-pack battery cell 410 includes a first surface 4101 relatively arranged along the first direction X, and any two adjacent shell assemblies 401, one of which has a first shell 4011 covering the portion of the first surface 4101 and the other of which has a second shell 4012 covering the portion of the first surface 4101, share a shell, which can simplify the shell structure of the shell assembly 401, facilitate the processing and manufacturing of the shell assembly 401, improve processing efficiency, reduce processing costs, and also help to reduce the thickness of the shell assembly 401 between the soft-pack battery cells 410 in two adjacent accommodating cavities 402, which is beneficial to reducing 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.

[0185] In some embodiments, the battery cell assembly 400 includes a plurality of soft-pack battery cells 410 and also includes an adhesive. The soft-pack battery cell 410 includes two first surfaces 4101 arranged opposite to each other along a first direction X. The first surfaces 4101 of the plurality of soft-pack battery cells 410 and the first surfaces 4101 and the shell assembly 401 are connected to each other by the adhesive.

[0186] The battery cell assembly 400 includes a plurality of soft-pack battery cells 410, each of which includes two first surfaces 4101 arranged opposite to each other along its thickness direction, the first surface 4101 being the surface with the largest surface area of ​​the soft-pack battery cell 410, the first surfaces 4101 of the plurality of soft-pack battery cells 410 are bonded to each other by an adhesive to form a battery pack, and the battery pack and the shell assembly 401 are also bonded to form a whole by an adhesive, so that the structure of the battery cell assembly 400 is more compact, and the shell assembly 401 has a better fixing and protecting effect on the soft-pack battery. After the soft-pack battery cells 410 are bonded into a battery pack, they are not prone to displacement and deformation, and after the shell assembly 401 is bonded to the battery pack, the risk of relative displacement between the shell assembly 401 and the battery pack can be reduced, and the stability of the shell assembly 401 in supporting and protecting the soft-pack battery cells 410 can be improved.

[0187] When the soft-pack battery cells 410 are put into the shell for assembly, an adhesive can be pre-coated on the first surface 4101 of each soft-pack battery cell 410, and an adhesive can be coated on the shell portion of the shell assembly 401 corresponding to the first surface 4101. The soft-pack battery cells 410 are put into the shell one by one, and the first surfaces 4101 and the first surface 4101 and the shell assembly 401 are bonded to each other to form a whole, which can improve the grouping efficiency and assembly accuracy.

[0188] In the above technical solution, the battery cell assembly 400 includes a plurality of soft-pack battery cells 410 and also includes an adhesive. The soft-pack battery includes two first surfaces 4101 arranged opposite to each other along a first direction X. The first surfaces 4101 of the plurality of soft-pack battery cells 410 and the shell assemblies 401 corresponding to the first surfaces 4101 are connected to each other by an 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, so that a single soft-pack battery cell 410 is not easily deformed, thereby reducing the risk of the battery cell assembly 400.

[0189] In some embodiments, the material of the housing assembly 401 is metal or plastic.

[0190] Optionally, in some embodiments, when the material of the shell component 401 is metal, it can be aluminum or steel, etc. When the material of the shell component 401 is plastic, it can be a composite material with higher hardness or non-metallic materials such as PA, PC, PET, etc.

[0191] The material of the shell component 401 is metal or plastic. Compared with the aluminum-plastic film shell of the soft-pack battery cell 410, it has a stable structure and higher strength, which can reduce the probability of deformation of the accommodating cavity 402 where the soft-pack battery cell 410 is located, and can effectively protect the soft-pack battery cell 410 and improve the stability and service life of the soft-pack battery cell 410.

[0192] In the above technical solution, the material of the shell 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 shell component 401 can provide support and protection for the soft-pack battery cell 410, reducing the risk of deformation and damage of the soft-pack battery cell 410.

[0193] In some embodiments, the soft-pack battery cell 410 is any one of a lithium iron phosphate battery cell, a ternary battery cell, and a solid-state battery cell.

[0194] In this embodiment, the soft-pack battery cell 410 is any one of a lithium iron phosphate battery cell, a ternary battery cell and a solid-state battery cell. The lithium iron phosphate battery cell has the advantages of high safety, long cycle life, good high temperature performance, etc. The ternary battery cell has the advantages of high energy density, fast charging, etc. The solid-state battery cell has the advantages of high safety, high energy density, long cycle life, etc. For example, the solid-state battery cell can be a sulfide solid-state battery, an oxide solid-state battery or a polymer solid-state battery, a composite solid-state electrolyte battery, a garnet solid-state battery, etc.

[0195] As an optional scheme, in some embodiments, when the soft-pack battery cell 410 is a lithium iron phosphate battery cell, in the positive electrode material of the soft-pack battery cell 410, 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 (for example, it may include but is 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 (for example, it may include but is not limited to 1, 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, 3, etc.). Exemplarily, when the soft-pack battery cell 410 is a lithium iron phosphate battery cell, the positive electrode active material is LFP (which may refer to LiFePO4, i.e., lithium iron phosphate), the binder may be PVDF (polyvinylidene fluoride), and the conductive agent may be conductive carbon black, wherein LFP:PVDF:conductive carbon black may be 96:2:2, that is, the total weight of the positive electrode active material is 100 parts, LFP accounts for 96 parts, PVDF accounts for 2 parts, and conductive carbon black also accounts for 2 parts. Among them, the weight unit of the positive electrode active material may be 10 grams. When the soft-pack battery cell 410 is a ternary battery cell, in the positive electrode material of the 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 to 3 parts of the total weight of the positive electrode material (for example, it may include but is not limited to 2, 2.2, 2.5, 2.8, 3, etc.), and the conductive agent accounts for 1 to 2 parts of the total weight of the positive electrode material (for example, it may include but is not limited to 1, 1.2, 1.5, 1.8, 2, etc.). Among them, the ternary battery cell can be but not limited to nickel cobalt manganese oxide lithium system, nickel cobalt 15 aluminum oxide lithium system, etc. Exemplarily, the ternary material of the ternary battery cell can be eight-series LiNi0.8Co0.1Mn0.1O2, and the weight ratio of the positive electrode active material, the binder, and the conductive agent is 96:2.5:1.5, that is, the total weight of the positive electrode material is divided into 100 parts, the eight-series LiNi0.8Co0.1Mn0.1O2 accounts for 96 parts, the binder accounts for 2.5 parts, and the conductive agent accounts for 1.5 parts. In the above technical solution, when the soft-pack battery cell 410 is a lithium iron phosphate battery cell, a high proportion of positive electrode active materials means that more substances capable of electrochemical reactions can be accommodated in a limited electrode assembly, which is beneficial to increasing the capacity and energy density of the battery device 100, so that the lithium iron phosphate battery cell can output higher power while being relatively small in size and weight, thereby meeting application scenarios with certain requirements for energy density. The use of the binder and the 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 soft-pack battery cell 410 is a ternary battery cell, since the structure and surface properties of the ternary material itself are relatively complex, the use of the positive electrode active material, binder, and conductive agent in the above-mentioned dosage ratio is beneficial to ensure good bonding between the 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, and is beneficial to reducing the risk of active material shedding and electrode pulverization during charging and discharging, thereby extending the cycle life of the battery device 100.

[0196] In the above technical solution, the soft-pack battery cell 410 is set to any one of a lithium iron phosphate battery cell, a ternary battery cell and a solid-state battery cell, so that the soft-pack battery cell 410 can be flexibly set to different types of battery cells as needed, thereby making the application scenarios of the soft-pack battery cell 410 wider, so that the battery device can better meet different usage requirements.

[0197] In some embodiments, the housing assembly 401 includes a first opening 404 , which is in communication with the first chamber 4021 . A reinforcement portion 450 is disposed near the first opening 404 of the housing assembly 401 , and the housing assembly 401 is connected to the bottom plate via the reinforcement portion 450 .

[0198] The soft-pack battery cell 410 can be assembled into the shell through the first opening 404. The battery cell assembly 400 is fixedly connected to the bottom plate of the box body 430 through the shell assembly 401. The first opening 404 is close to the bottom plate of the box body 430. The reinforcement part 450 is arranged close to the first opening 404, which can improve the shell strength of the shell assembly 401 and make the first opening 404 not easy to deform. The shell assembly 401 can effectively fix the soft-pack battery cell 410 and ensure the stability of the connection between the battery cell assembly 400 and the box body 430. It can provide stable support for the soft-pack battery cell 410 to prevent the soft-pack battery cell 410 from being deformed by external force impact, and can disperse the external impact force to the entire box body 430, thereby improving the service life of the soft-pack battery cell 410.

[0199] In the above technical solution, the shell assembly 401 includes a first opening 404, which is connected to the first chamber 4021. A reinforcing portion 450 is provided at a position of the shell assembly 401 near the first opening 404. The shell assembly 401 is connected to the bottom plate through the reinforcing portion 450, so that the battery cell assembly 400 and the box 430 of the battery device 100 can be connected as a whole, which can further improve the ability of the soft-pack battery cell 410 to resist vibration and impact, and reduce the risk of deformation and displacement of the soft-pack battery cell 410. At the same time, the reinforcing portion 450 can improve the strength of the shell assembly 401, so that the shell assembly 401 is not easy to deform, and provide stable support for the soft-pack battery cell 410.

[0200] In some embodiments, the bottom plate is provided with a slot, and the reinforcing portion 450 is inserted into the slot.

[0201] In the above technical solution, a slot is set in the bottom plate, and the reinforcement part 450 is inserted into the slot, which can improve the connection strength between the shell component 401 and the bottom plate of the box body 430, and it is not easy to separate from the box body 430 when subjected to vibration impact. The impact force can also be dispersed to the entire box body 430, so that the force is evenly applied to the shell component 401 and it is not easy to deform. At the same time, the reinforcement part 450 is inserted into the slot, which can reduce the size of the shell component 401 along the second direction Y, which is beneficial to saving space in the box body 430 and improving space utilization.

[0202] In some embodiments, the battery device 100 further includes a thermally conductive structural adhesive, and a side of the soft-pack battery cell 410 close to the first opening 404 is bonded to the bottom plate by the thermally conductive structural adhesive.

[0203] The side of the soft-pack battery cell 410 close to the first opening 404 may be the second surface 4102 of the soft-pack battery cell 410 close to the first opening 404. The second surfaces 4102 of multiple soft-pack batteries close to the first opening 404 are bonded to the bottom plate of the box body 430 through a thermally conductive structural adhesive, which can enhance the bonding strength between the battery cell assembly 400 and the box body 430. When subjected to external impact and vibration, the soft-pack battery cell 410 is not easily displaced or deformed.

[0204] In the above technical solution, the battery device 100 includes a thermally conductive structural adhesive, and the side of the soft-pack battery cell 410 close to the first opening 404 is bonded to the bottom plate by the thermally conductive structural adhesive. On the basis that the reinforcement portion 450 of the shell assembly 401 is fixed to the bottom plate through a slot, the soft-pack battery cell 410 is bonded to the bottom plate by the thermally conductive structural adhesive, which can further improve the connection strength between the battery cell assembly 400 and the box 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 and can conduct the heat generated by the soft-pack battery cell 410 to the bottom plate of the box 430, which is beneficial to reduce the temperature of the soft-pack battery cell 410 and reduce the risk of thermal runaway.

[0205] In some embodiments, the bottom plate is a heat exchange plate, and the soft-pack battery cells 410 are bonded to the heat exchange plate by a heat-conductive structural adhesive.

[0206] A heat exchange channel is formed in the heat exchange plate, and the heat exchange channel is used to accommodate and flow a heat exchange medium. The heat exchange medium can contact the soft-pack battery cell 410 at intervals through the heat exchange plate to exchange heat with the soft-pack battery cell 410.

[0207] Due to the heat exchange between the heat exchange plate and the soft-pack battery cell 410, when the temperature of the soft-pack battery cell 410 is high, the heat can be transferred to the heat exchange component by heat conduction, so that the soft-pack battery cell 410 is in a suitable operating temperature range, thereby improving the service life of the battery device 100. When the temperature of the soft-pack battery cell 410 is too low, the heat exchange medium can heat the soft-pack battery cell 410 through the heat exchange component to improve the charging and discharging efficiency of the soft-pack battery cell 410.

[0208] In the above technical solution, the bottom plate of the box 430 integrates the function of the heat exchange plate, which can improve the space utilization of the box 430. The soft-pack battery cell 410 is bonded to the heat exchange plate by a thermally conductive structural adhesive. A heat exchange medium flows in the heat exchange plate. The soft-pack battery cell 410 is bonded to the heat exchange plate by the thermally conductive structural adhesive, which 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, the soft-pack battery cell 410 can be placed in a suitable operating temperature range, thereby improving the charging and discharging efficiency of the soft-pack battery cell 410 and extending the service life of the battery device 100.

[0209] In some embodiments, the reinforcement portion 450 is formed by bending the shell of the shell assembly 401 .

[0210] In the above technical solution, the reinforcing portion 450 is formed by bending the shell of the shell assembly 401. The reinforcing portion 450 and the shell assembly 401 are integrally formed, which is conducive to simplifying the processing technology and improving the production cycle, and will not introduce new parts, which is conducive to reducing production costs.

[0211] In some embodiments, the reinforcement portion 450 is wavy in shape.

[0212] In the above technical solution, the reinforcing portion 450 is configured to be wavy in 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, thereby reducing the risk of deformation and displacement of the soft-pack battery cell 410.

[0213] In some embodiments, the reinforcement portion 450 is formed by locally thickening the shell of the shell assembly 401 .

[0214] In the above technical solution, the reinforcement part 450 is formed by partially thickening the shell of the shell assembly 401, which can reduce the processing difficulty of the reinforcement part 450, facilitate production and manufacturing, and improve production efficiency.

[0215] In some embodiments, the battery device 100 further includes an expansion beam connected to the bottom plate, and the housing assembly 401 abuts against the expansion beam along the first direction X.

[0216] The expansion beam generally abuts against both sides of the shell assembly 401 of the battery cell assembly 400 along the thickness direction of the soft-pack battery cell 410, which can absorb the expansion force of the soft-pack battery cell 410, reduce the risk of deformation of the shell assembly 401, and ensure that the shell assembly 401 can stably maintain the position of the soft-pack battery cell 410, thereby reducing the risk of displacement and deformation of the soft-pack battery cell 410, thereby causing short circuit and leakage.

[0217] In the above technical solution, the battery device 100 also includes an expansion beam, which is connected to the bottom plate. The shell assembly 401 abuts against the expansion beam along the first direction X, which can reduce the number of components inside the box 430 and improve the internal space utilization of the box 430. More battery cell assemblies 400 can be accommodated, which is beneficial to improving the capacity of the battery device 100. The expansion beam abuts against the shell 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 of the shell assembly 401.

[0218] In a second aspect, the present application provides an electrical device 1, comprising: a battery device 100 according to the first aspect of the present application.

[0219] In the above-mentioned embodiment, by setting the battery device 100 of the first aspect, the battery cell assembly 400 includes a shell assembly 401, and the shell assembly 401 includes a partition plate 403. Since the partition plate 403 divides the accommodating cavity 402 of the shell assembly 401 into a first chamber 4021 and a second chamber 4022 that can communicate with each other, the soft-pack battery cell 410 is arranged in the first chamber 4021. When a certain soft-pack battery cell 410 has thermal runaway, the discharged high-temperature and high-pressure medium can enter the second chamber 4022, thereby reducing the risk of thermal runaway of the adjacent soft-pack battery cell 410; and the shell assembly Component 401 can also reduce the range of movement and deformation of each soft-pack battery cell 410. The second surface 4102 of the soft-pack battery cell 410 is bonded to the box body 430, which can improve the stability of the position of the soft-pack battery cell 410 in the battery cell assembly 400 and reduce the probability of short circuit or leakage caused by the movement of the soft-pack battery cell 410. In addition, the shell assembly 401 can also disperse external impact force, reduce the risk of the soft-pack battery cell 410 being subjected to excessive impact force, and improve the service life of the soft-pack battery cell 410 and the service life of the battery device 100, thereby improving the overall performance of the electrical device 1.

[0220] In some embodiments, the electrical device includes a vehicle, the vehicle includes a floor, the box 430 includes a second opening 440 , and the floor covers the second opening 440 .

[0221] In the above technical solution, the electrical device includes a vehicle, the vehicle includes a floor, the box body 430 includes a second opening 440, and the floor cover is closed on the second opening 440. The box body 430 of the battery device 100 uses the floor of the vehicle itself as a box cover for sealing, which can reduce costs and improve space utilization, increase the capacity of the box body 430, and improve the height of the vehicle chassis.

[0222] The following will refer to Figures 3 to 7 A battery device 100 according to a specific embodiment of the present application is described.

[0223] The battery device 100 includes: a battery cell assembly 400, a box body 430 and a heat exchange plate. The box body 430 is provided with a second opening 440. The battery cell assembly 400 is assembled into the box through the second opening 440 of the box body 430. At the same time, the floor cover of the vehicle is closed with the second opening 440 to complete the sealing of the entire battery device 100.

[0224] The battery cell assembly 400 is placed inside the box 430 and supported on a heat exchange plate at the bottom of the box 430. The battery cell assembly 400 includes a plurality of shell assemblies 401 arranged in sequence along the thickness direction of the soft-pack battery cell 410. The shell assembly 401 has a receiving cavity 402 and a partition plate 403 disposed in the receiving cavity 402. The partition plate 403 divides the receiving cavity 402 into a first chamber 4021 and a second chamber 4022 that can communicate with each other. A plurality of soft-pack battery cells 410 are received in the first chamber 4021. The second chamber 4022 is configured to accommodate a high-temperature and high-pressure medium discharged from the first chamber 4021. The shell assembly 401 includes a first shell 4011 and a second shell 4012. The first shell 4011 and / or the second shell 4012 are in an F-shaped structure. The first shell 4011 and the second shell 4012 cooperate to form a accommodating cavity 402. There is no need to deform the shell when the soft-pack battery cell 410 is assembled into the shell, which can improve the assembly accuracy of the battery cell assembly 400. After the assembly is completed, the shell assembly 401 is formed with a first opening 404 at a position corresponding to the bottom plate of the box body 430. The side of the soft-pack battery cell 410 close to the first opening 404 is bonded and fixed to the box body 430. The shell assembly 401 is formed with a reinforcement part 450 at a position close to the first opening 404. The reinforcement part 450 is formed by bending the shell of the shell assembly 401, and the shell assembly 401 is plugged and matched with the bottom plate of the box body 430 through the reinforcement part 450.

[0225] The accommodating cavity 402 of each shell component 401 accommodates multiple soft-pack battery cells 410, and the soft-pack battery cells 410 include first surfaces 4101 opposite to each other along the thickness direction, and second surfaces 4102 along the width direction. Along the thickness direction of the soft-pack battery cells 410, the shell components 401 corresponding to the first surfaces 4101 of two soft-pack battery cells 410 close to each other at the ends of any two adjacent accommodating cavities 402 can be shared, and the part of the first shell 4011 of one shell component 401 covering the first surface 4101 and the part of the second shell 4012 of the adjacent shell component 401 covering the corresponding first surface 4101 can share the shell.

[0226] An adhesive is coated between the first surfaces 4101 of the plurality of soft-pack battery cells 410 in each accommodating cavity 402 and between the first surface 4101 and the corresponding shell assembly 401 , and the plurality of soft-pack battery cells 410 and the shell assembly 401 are bonded into a whole.

[0227] A glue blocking structure 4103 is provided between R corners of adjacent soft-pack battery cells 410 located in the same accommodating cavity 402 , and the glue blocking structure 4103 is connected to the bottom of the box body 430 .

[0228] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: A box body having a bottom plate for carrying a battery cell assembly; The battery cell assembly comprises: a housing assembly having a housing cavity, the housing assembly comprising a partition plate disposed in the housing cavity, the partition plate dividing the housing cavity into a first chamber and a second chamber that can communicate with each other, and A soft-pack battery cell is disposed in the first chamber; The second chamber is configured to accommodate the medium discharged from the first chamber, and the soft-pack battery cell is bonded to the box.

2. The battery device according to claim 1, characterized in that: The partition plate is provided with a first pressure relief area, and the first pressure relief area is configured to communicate with the first chamber and the second chamber.

3. The battery device according to claim 2, characterized in that: The first pressure relief area includes a through hole provided on the partition plate, and the through hole communicates with the first chamber and the second chamber.

4. The battery device according to claim 2, characterized in that: The first pressure relief area includes a weak portion disposed on the partition plate, and the weak portion is configured to be broken under a preset pressure to communicate the first chamber with the second chamber.

5. The battery device according to claim 4, characterized in that: The weak portion includes a notch groove disposed on the partition plate, and the notch groove is configured to be torn under a preset pressure to communicate the first chamber and the second chamber.

6. The battery device according to claim 1, characterized in that: The first end of the partition plate is connected to the wall of the shell component, and the second end is spaced apart from the wall of the shell component to form a gap, and the gap communicates the first chamber and the second chamber.

7. The battery device according to claim 1, characterized in that: The partition plate includes a first plate and a second plate, the first plate and the second plate are arranged opposite to each other and are respectively connected to the wall of the shell assembly, and a gap is formed between the two, and the gap connects the first chamber and the second chamber.

8. The battery device according to any one of claims 1 to 7, characterized in that: The shell assembly further includes a first shell and a second shell, wherein the first shell and the second shell together form the accommodating cavity, and the partition plate is connected to the first shell and / or the second shell.

9. The battery device according to claim 8, characterized in that: The battery cell assembly comprises a plurality of the soft-pack battery cells, wherein the soft-pack battery cells comprise two first surfaces disposed opposite to each other and two second surfaces disposed opposite to each other, wherein the surface area of ​​the first surface is greater than that of the second surface; The first housing includes a first fixing portion and a second fixing portion, wherein the first fixing portion and the second fixing portion are connected at an angle; The first fixing portion faces the first surface along a first direction and covers at least a portion of the first surface, and the second fixing portion covers at least a portion of the second surface of the soft-pack battery cell along a second direction; The second shell includes a third fixing portion, which is disposed on a side of the second fixing portion away from the first fixing portion and covers at least a portion of the first surface along the first direction.

10. The battery device according to claim 9, characterized in that: The first surface and the second surface of any one of the soft-pack battery cells are connected via a transition portion.

11. The battery device according to claim 10, characterized in that: The transition portion is an R angle.

12. The battery device according to claim 11, characterized in that: A glue blocking structure is provided between the R corners of any two adjacent soft-pack battery cells located in the same accommodating cavity, and the glue blocking structure is connected to the bottom of the box body.

13. The battery device according to claim 12, characterized in that: The glue blocking structure is a glue blocking strip.

14. The battery device according to claim 9, characterized in that: The second fixing portion is vertically connected to the first fixing portion; the partition plate is vertically connected to the first fixing portion and is spaced apart from the second fixing portion along the second direction; The first fixing portion, the second fixing portion, the third fixing portion and the partition plate are collectively arranged to form the second chamber; The first fixing portion, the partition plate and the third fixing portion are jointly arranged to form the first chamber.

15. The battery device according to claim 9, characterized in that: The second housing further includes a fourth fixing portion, and the third fixing portion and the fourth fixing portion are connected at an angle; The fourth fixing portion is disposed in abutment with the second fixing portion, and together they cover the second surface along the second direction.

16. The battery device according to claim 15, characterized in that: Projections of the second fixing portion and the fourth fixing portion along the second direction at least partially overlap.

17. The battery device according to claim 15, characterized in that: The second fixing portion and the fourth fixing portion are welded and connected at sides close to each other along the first direction.

18. The battery device according to claim 8, characterized in that The battery cell assembly includes a plurality of shell assemblies, which are arranged in sequence along a first direction, and the soft-pack battery cell is disposed in the accommodating cavity of each shell assembly.

19. The battery device according to claim 18, characterized in that: At least two adjacent shell components share a portion of the shell.

20. The battery device according to claim 19, characterized in that The soft-pack battery cell includes two first surfaces arranged opposite to each other along the first direction, and any two adjacent shell components, a portion of the first shell covering the first surface of one and a portion of the second shell covering the first surface of the other share a common shell.

21. The battery device according to any one of claims 1 to 7, characterized in that: The battery cell assembly includes a plurality of the soft-pack battery cells and also includes an adhesive. The soft-pack battery cells include two first surfaces arranged opposite to each other along a first direction. The first surfaces of the plurality of the soft-pack battery cells and the first surfaces and the shell assembly are connected to each other through the adhesive.

22. The battery device according to any one of claims 1 to 7, characterized in that: The material of the housing component is metal or plastic.

23. The battery device according to any one of claims 1 to 7, characterized in that: The soft-pack battery cell is any one of a lithium iron phosphate battery cell, a ternary battery cell and a solid-state battery cell.

24. The battery device according to any one of claims 1 to 7, characterized in that: The shell assembly includes a first opening, the first opening is communicated with the first chamber, a reinforcement portion is provided at a position of the shell assembly close to the first opening, and the shell assembly is connected to the bottom plate through the reinforcement portion.

25. The battery device according to claim 24, characterized in that The bottom plate is provided with a slot, and the reinforcement part is plugged into the slot.

26. The battery device according to claim 24, characterized in that The battery device further comprises a heat-conducting structural adhesive, and a side of the soft-pack battery cell close to the first opening is bonded to the bottom plate by the heat-conducting structural adhesive.

27. The battery device according to claim 26, characterized in that The bottom plate is a heat exchange plate, and the soft-pack battery cells are bonded to the heat exchange plate by the heat-conductive structural adhesive.

28. The battery device according to claim 24, characterized in that The reinforcement portion is formed by bending a shell of the shell assembly.

29. The battery device according to claim 28, characterized in that The reinforcement portion is wave-shaped.

30. The battery device according to claim 24, characterized in that The reinforcement portion is formed by locally thickening the shell of the shell assembly.

31. The battery device according to any one of claims 1 to 7, characterized in that: The battery device further includes an expansion beam connected to the bottom plate, and the housing assembly abuts against the expansion beam along a first direction.

32. An electrical device, characterized in that: Comprising a battery device as claimed in any one of claims 1 to 31.

33. The electrical device according to claim 32, characterized in that: The electric device comprises a vehicle, the vehicle comprises a floor, the box comprises a second opening, and the floor covers the second opening.

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