Battery devices and electrical equipment

Abstract

This application discloses a battery device and an electrical appliance. The battery device includes a housing, a battery cell assembly, and a flow guide. The housing includes a receiving space and a first surface and a second surface. The first surface faces the receiving space and intersects with a first direction. The second surface intersects with the first surface. The first direction is consistent with the height direction of the housing. The battery cell assembly is disposed within the receiving space and supported by the first surface. The battery cell assembly has a gap between itself and the second surface along a second direction. The second direction is consistent with the length or width direction of the housing. The flow guide is disposed within the receiving space and, together with the battery cell assembly, the first surface, and the second surface, encloses an adhesive injection space. The flow guide has a flow guiding structure on the side facing the adhesive injection space. The flow guiding structure constructs multiple flow guiding channels, which are configured to guide adhesive from outside the adhesive injection space to the inside of the adhesive injection space, thereby improving the adhesive injection quality of the battery device.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to a battery device and electrical equipment. Background Technology

[0002] With the development of new energy sources, more and more fields are adopting new energy as a power source. Due to its advantages such as high energy density, rechargeability, safety, and environmental friendliness, battery devices are widely used in new energy vehicles, consumer electronics, energy storage systems, and other fields.

[0003] A battery assembly includes a housing and individual battery cells housed within the housing. The battery cells are typically fixed to the housing using adhesive injection. In related technologies, adhesive is directly injected between the battery cells and the housing, relying solely on the assembly personnel's experience to judge the injection process. This results in inconsistent adhesive injection quality, which is detrimental to improving the yield rate of the battery assembly. Utility Model Content

[0004] In view of the above problems, this application provides a battery device and an electrical appliance that solves the problem of how to improve the quality of encapsulation in the battery device.

[0005] The first aspect of this application discloses a battery device, the battery device comprising:

[0006] The enclosure includes a receiving space, and includes a first surface and a second surface. The first surface faces the receiving space and intersects with a first direction, and the second surface intersects with the first surface. The first direction is consistent with the height direction of the enclosure.

[0007] A battery cell assembly is disposed within a receiving space and supported by a first surface. Along a second direction, there is a gap between the battery cell assembly and the second surface. The second direction is consistent with the length or width direction of the housing.

[0008] A flow guide is disposed within the receiving space. The flow guide, together with the battery cell assembly, the first surface, and the second surface, encloses the glue injection space. The flow guide has a flow guiding structure on the side facing the glue injection space. The flow guiding structure constructs multiple flow guiding channels, which are configured to guide the glue outside the glue injection space to the inside of the glue injection space.

[0009] In this application, a flow guide is provided, and multiple flow channels are constructed through the flow guide structure. During the glue injection process, the glue flows along multiple flow channels, which improves the uniformity of glue flow and reduces the situation of glue overflowing under unrestrained conditions. This improves the glue injection quality of the battery device and increases the yield of the battery device.

[0010] In some embodiments of this application, the flow guide includes:

[0011] The main body is positioned opposite and spaced apart from the first surface along the first direction.

[0012] Multiple flow guide ribs are provided on the side of the main body facing the first surface and form a flow guide structure, thereby creating multiple flow guide channels.

[0013] This design, utilizing multiple guide ribs to create multiple flow channels, can improve the guiding effect on the adhesive, thereby balancing the pressure at the adhesive front during the injection process and enabling the adhesive to fill more evenly.

[0014] In some embodiments of this application, multiple guide ribs are spaced apart along a third direction, and a guide channel is formed between two adjacent guide ribs, with the first direction, the second direction and the third direction intersecting each other.

[0015] This design allows the flow channels formed by multiple guide ribs to connect with the gaps between the battery cells and other structures, thereby improving the filling effect of the adhesive and further enhancing the quality of the adhesive injection.

[0016] In some embodiments of this application, the battery cell assembly includes a plurality of battery cells arranged along a third direction, with at least a portion of the battery cells arranged in a manner such that there is a transition position between two adjacent battery cells, and the transition position is arranged opposite to a guide rib.

[0017] This design reduces the likelihood of adhesive entering the transition area during the injection process and affecting the flow direction of the adhesive, thus further improving the injection quality of the battery device.

[0018] In some embodiments of this application, the guide ribs are plate-like structures, which are perpendicular to the first surface and the third direction, respectively.

[0019] This design increases the contact area with the adhesive using a plate-like structure, thereby improving the guiding performance of the adhesive and further enhancing the flow directionality of the adhesive, which in turn improves the glue application quality of the battery device.

[0020] In some embodiments of this application, the plurality of guide ribs include:

[0021] The first guide rib, the number of the first guide ribs is multiple, and the first guide rib has a first dimension along a third direction;

[0022] The second guide rib, there are multiple second guide ribs, the second guide rib has a second dimension along a third direction, the second dimension is smaller than the first dimension.

[0023] This design improves the structural strength of the main body, thereby giving the guide component better structural strength and reducing the likelihood of damage to the guide component during transport.

[0024] In some embodiments of this application, at least one second guide rib is provided between two adjacent first guide ribs;

[0025] And / or, the first dimension is in the range of 3 mm to 4 mm;

[0026] And / or, the second dimension is in the range of 1 mm to 2 mm.

[0027] This design further enhances the structural strength of the guide component, thereby reducing the risk of breakage or other damage during transport due to insufficient strength.

[0028] In some embodiments of this application, along the first direction, the guide rib abuts against the first surface, and the maximum distance between the main body and the first surface is less than the maximum distance between the battery cell assembly and the first surface. In this embodiment, a glue injection port is formed between the circumferential edge of the main body and the battery cell assembly and / or the second surface, and the glue injection port allows glue to flow into multiple guide channels.

[0029] This design allows the flow channel formed by the flow guide to reach the first surface of the housing, enabling the adhesive to effectively reach the first surface and evenly fill the space between the housing and the battery cells, thereby further improving the adhesive application effect of the battery device.

[0030] In some embodiments of this application, the guide ribs and the main body are integrally formed. This design reduces processing steps and improves processing efficiency.

[0031] In some embodiments of this application, along a third direction, the size of the main body is greater than or equal to the size of the battery cell assembly, and the first direction, the second direction, and the third direction intersect each other.

[0032] This design allows the flow guide to fully cover the battery cell assembly in the third direction, reducing blind spots in the glue application process and further improving the glue application quality of the battery device, thus increasing the yield rate of the battery device.

[0033] In some embodiments of this application, the main body includes a plurality of overflow holes, which are spaced apart along a third direction. Each guide channel is connected to an overflow hole, and the first direction, the second direction, and the third direction intersect each other.

[0034] During the glue injection process, the height of the glue injection is determined by whether glue overflows through the overflow hole. This allows for precise control of the glue injection height, further improving the glue injection quality of the battery device and enhancing product consistency during the production process.

[0035] In some embodiments of this application, the overflow hole is a stepped hole, which includes a first hole segment and a second hole segment coaxially connected. The diameter of the first hole segment is smaller than the diameter of the second hole segment, and the first hole segment is disposed on the side of the second hole segment facing the first surface.

[0036] The first orifice is configured to allow adhesive to enter the flow channel, and the second orifice is configured to allow adhesive to overflow from the first orifice, so that when there is adhesive in the second orifice, a preset injection height is reached.

[0037] The first and second hole sections form a stepped structure, which is used to contain the overflowing glue. In this way, while effectively judging the glue injection height, the situation of glue overflowing is reduced, and the glue injection quality of the battery device is further improved.

[0038] In some embodiments of this application, the size of the second hole segment along the first direction is in the range of 4 mm to 5 mm;

[0039] And / or, the diameter of the second hole is in the range of 3 mm to 4 mm.

[0040] This design ensures that the adhesive can effectively overflow during the injection process while reducing the impact of the opening on the structural strength of the guide component.

[0041] In some embodiments of this application, the plurality of overflow holes include a first overflow hole, a second overflow hole, and a third overflow hole, and along a third direction, the second overflow hole and the third overflow hole are disposed on opposite sides of the first overflow hole;

[0042] The minimum distance between the first overflow hole and the first surface is the first distance, the distance between the second overflow hole and the first surface is the second distance, and the distance between the third overflow hole and the first surface is the third distance. The first distance is greater than the second distance, and the second distance is greater than the third distance.

[0043] By setting overflow holes at different distances from the first surface, a single flow guide can meet the observation requirements for various flow heights, thereby improving the versatility of the flow guide, reducing the need for multiple specifications of flow guides, and lowering production and processing costs.

[0044] In some embodiments of this application, the first overflow hole, the second overflow hole, and the third overflow hole constitute an overflow monitoring structure, and multiple overflow monitoring structures are provided on the main body along the third direction.

[0045] This setup allows for effective monitoring of the glue injection height at multiple locations from a third-party perspective, thereby improving the uniformity of glue injection and further enhancing the injection effect.

[0046] A second aspect of this application provides an electrical device comprising a battery device as described above.

[0047] In this application, a flow guide is provided in the battery device, which forms multiple flow channels. During the glue injection process, the glue flows along the multiple flow channels, which improves the uniformity of glue flow and reduces the overflow of glue when it is unrestrained. This improves the glue injection quality of the battery device and increases the yield of the battery device.

[0048] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0049] Figure 1 A schematic diagram of the structure of a vehicle according to one embodiment of this application is shown.

[0050] Figure 2 A schematic diagram of the structure of a battery device according to one embodiment of this application is shown.

[0051] Figure 3 A schematic diagram of the structure of a battery device according to one embodiment of this application is shown.

[0052] Figure 4 for Figure 3 A cross-sectional view of the battery device at point AA (showing part of the structure);

[0053] Figure 5 for Figure 4 An enlarged structural diagram of the battery device at point C shown;

[0054] Figure 6 for Figure 3 A cross-sectional view of the battery device at point BB shown;

[0055] Figure 7 for Figure 6 An enlarged structural diagram of the battery device at point D shown;

[0056] Figure 8 for Figure 3 A schematic diagram of the flow guide shown;

[0057] Figure 9 for Figure 8 A schematic diagram of the flow guide shown from another perspective;

[0058] Figure 10 for Figure 9 The cross-sectional view of the guide at the EE shown.

[0059] The attached figures are labeled as follows:

[0060] 1000, vehicles;

[0061] 100. Battery assembly; 200. Controller; 300. Motor;

[0062] 10. Battery cell modules;

[0063] 11. Battery cell; 12. Transition location;

[0064] 20. Box body;

[0065] 21. First housing; 22. Second housing; 221. First surface; 222. Accommodation space; 223. Second surface;

[0066] 30. Airflow guide;

[0067] 31. Main body; 310. Glue overflow hole; 311. Glue overflow monitoring structure; 312. Second Glue overflow hole; 313. First Glue overflow hole; 314. Third Glue overflow hole; 315. First hole section; 316. Second hole section; 32. First guide rib; 33. Second guide rib; 34. Glue injection space; 35. Flow channel; 36. Guide rib;

[0068] 40. Injection port;

[0069] X, first direction; Y, second direction; Z, third direction; L1, first dimension; L2, second dimension; D1, first distance; D2, second distance; D3, third distance. Detailed Implementation

[0070] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0071] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0072] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0073] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0074] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0075] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0076] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0077] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0078] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery device applications, market demand is also constantly increasing.

[0079] In related technologies, glue is directly injected between the battery cell and the casing, and the glue injection is judged solely by the experience of the assembly personnel. This results in inconsistent glue injection quality in the battery device, which is not conducive to improving the yield rate of the battery device.

[0080] In this application, the battery device includes a housing, a battery cell assembly, and a flow guide. The housing includes a receiving space, a first surface, and a second surface. The first surface faces the receiving space and intersects with a first direction, while the second surface intersects with the first surface. The first direction is consistent with the height direction of the housing. The battery cell assembly is disposed within the receiving space and supported by the first surface. Along a second direction, there is a gap between the battery cell assembly and the second surface. The second direction is consistent with the length or width direction of the housing. The flow guide is disposed within the receiving space. The flow guide, the battery cell assembly, the first surface, and the second surface enclose an adhesive injection space. The flow guide has a flow guiding structure on the side facing the adhesive injection space. The flow guiding structure constructs multiple flow guiding channels, which are configured to guide adhesive from outside the adhesive injection space to the inside of the adhesive injection space. In this application, a flow guide is provided, and multiple flow channels are constructed through the flow guide structure. During the glue injection process, the glue flows along multiple flow channels, which improves the uniformity of glue flow and reduces the situation of glue overflowing under unrestrained conditions. This improves the glue injection quality of the battery device and increases the yield of the battery device.

[0081] The technical solutions described in this application are not limited to the devices described above, but can also be applied to all devices that use battery devices. However, for the sake of brevity, the following embodiments are all illustrated using electric vehicles as examples.

[0082] For example, such as Figure 1The diagram shown is a structural schematic of a vehicle according to one embodiment of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. The vehicle 1000 may contain a motor 300, a controller 200, and a battery device 100. The controller 200 controls the battery device 100 to supply power to the motor 300. For example, the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000. For example, the battery device 100 can serve as the operating power source for the vehicle 1000's electrical system, such as meeting the power requirements for starting, navigation, and operation of the vehicle 1000. In another embodiment of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000 but also as the driving power source, replacing or partially replacing gasoline or natural gas to provide driving power to the vehicle 1000.

[0083] The battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies 10 for providing voltage and capacity. The battery cell assembly 10 may include multiple battery cells 11, which are connected in series, parallel, or mixed connection via a busbar.

[0084] In some embodiments, the battery cell assembly 10 is typically formed by arranging a plurality of battery cells 11.

[0085] As an example, the battery cell assembly 10 can be a battery module, which is formed by arranging and fixing multiple battery cells 11 together to form an independent module. As an example, the battery module can be formed by bundling multiple battery cells 11 together with cable ties.

[0086] In some embodiments, such as Figure 2 As shown, the battery device 100 can be a battery pack, which includes a housing 20 and one or more battery cell assemblies 10, with the battery cell assemblies 10 housed in the housing 20.

[0087] As an example, the battery cell assembly 10 can be a battery module, and the battery cell assembly 10 can be housed in the housing 20 by fixing the battery module in the housing 20.

[0088] As an example, the battery cell assembly 10 can also be housed in the housing 20 by directly fixing multiple battery cells 11 to the housing 20.

[0089] As an example, such as Figure 2 As shown, the housing 20 may include a first housing 21 and a second housing 22. The first housing 21 and the second housing 22 are fastened together to form a closed space inside the housing 20 to house the battery cell assembly 10. Here, "closed" refers to covering or closing, which can be sealed or unsealed. The first housing 21 may be a top cover or a bottom plate.

[0090] As an example, the housing 20 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 the interior of the housing 20 forms an enclosed space to accommodate the battery cell assembly 10.

[0091] In some embodiments, the housing 20 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 20 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 20 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0092] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells 11, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0093] In some embodiments of this application, the battery cell 11 can be a secondary battery, which refers to a battery cell 11 that can be used again after being discharged by recharging to activate the active material.

[0094] The battery cell 11 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0095] As an example, the battery cell 11 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0096] The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the negative and positive electrodes. During the charging and discharging process of the battery cell 11, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, serves to prevent short circuits between the positive and negative electrodes while allowing active ions to pass through.

[0097] In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0098] As an example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive active material is disposed on either or both of the two opposite surfaces of the positive current collector.

[0099] As an example, the positive current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, pure metals, alloys, or surface-treated metals can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0100] As an example, the positive electrode active material may include at least one of the following materials: lithium phosphate, lithium transition metal oxide, and their respective modified compounds. However, this application is not limited to these materials, and other conventional materials that can be used as battery positive electrode active materials may also be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium phosphate include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), lithium iron phosphate and carbon composites, lithium manganese phosphate (such as LiMnPO4), lithium manganese phosphate and carbon composites, lithium iron manganese phosphate, and lithium iron manganese phosphate and carbon composites. Examples of lithium transition metal oxides include, but are not limited to, lithium cobalt oxide (such as LiCoO2), lithium nickel oxide (such as LiNiO2), lithium manganese oxide (such as LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, and lithium nickel cobalt manganese oxide (such as LiNi). 1 / 3 Co 1 / 3 Mn 1 / 3 O2 (also known as NCM) 333 LiNi 0.5 Co 0.2 Mn 0.3 O2 (also known as NCM) 523 LiNi 0.5 Co 0.25 Mn 0.25 O2 (also known as NCM) 211 LiNi 0.6 Co 0.2 Mn 0.2O2 (also known as NCM) 622 LiNi 0.8 Co 0.1 Mn 0.1 O2 (also known as NCM) 811 ), lithium nickel cobalt aluminum oxide (such as LiNi) 0.8 Co 0.15 Al 0.05 At least one of O2 and its modified compounds. Modified compounds refer to substances obtained by modification methods such as doping or coating based on the above-mentioned substances.

[0101] In some embodiments, the positive electrode can be a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, etc. When foamed metal is used as the positive electrode, the surface of the foamed metal may or may not contain a positive electrode active material. As an example, a positive electrode active material is filled and / or deposited within the foamed metal.

[0102] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0103] As an example, the negative electrode current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, pure metals, alloys, or surface-treated metals can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver. The composite current collector may include a polymer material substrate and a metal layer. The composite current collector can be formed by forming a metal material (copper, copper alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0104] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0105] As an example, the negative electrode current collector has two surfaces opposite each other in its own thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0106] As an example, the negative electrode active material may be a negative electrode active material known in the art for use in battery cell 11. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate, etc. Silicon-based materials may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. Tin-based materials may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, this application is not limited to these materials, and other conventional materials that can be used as negative electrode active materials for battery cell 11 may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0107] In some embodiments, the negative electrode can be a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, etc. When foamed metal is used as the negative electrode sheet, the surface of the foamed metal may or may not have a negative electrode active material.

[0108] As an example, negative electrode active materials can be filled or / and deposited within the negative electrode current collector.

[0109] In some embodiments, the positive current collector can be made of aluminum, and the negative current collector can be made of copper.

[0110] In some embodiments, the electrode assembly further includes an isolator disposed between the positive and negative electrodes.

[0111] In some embodiments, the separator is a separator membrane. This application does not impose any particular limitation on the type of separator membrane; any known porous separator membrane with good chemical and mechanical stability can be selected.

[0112] As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without particular limitation. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a single component located between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes. An inorganic particle coating, an organic particle coating, or an organic / inorganic composite coating can also be applied to the surface of the separator.

[0113] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0114] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0115] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0116] In some implementations, the electrode assembly is a stacked structure.

[0117] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0118] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0119] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0120] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0121] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0122] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0123] In some embodiments, the electrode assembly has tabs on its plates that allow current to be drawn out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0124] In some embodiments, a pressure relief mechanism is provided on the housing. The pressure relief mechanism is used to release the internal gas of the battery cell 11.

[0125] As an example, the internal pressure or temperature of the battery cell 11 is actuated to release the internal pressure or temperature when it reaches a predetermined threshold. When the internal pressure or temperature of the battery cell 11 reaches the predetermined threshold, the pressure relief mechanism is activated or a weak structure in the pressure relief mechanism is destroyed, thereby forming an opening or channel for the internal pressure or temperature to be released. The threshold design varies depending on the design requirements. The threshold may depend on the materials of one or more of the positive electrode, negative electrode, electrolyte, and separator in the battery cell 11.

[0126] As an example, the pressure relief mechanism can be integrally molded with the housing.

[0127] As an example, the pressure relief mechanism can also be separately installed and connected to the housing.

[0128] The term "actuation" as used in this application refers to the pressure relief mechanism being activated or undergoing a certain state, thereby releasing the internal pressure and temperature of the battery cell 11. The actions of the pressure relief mechanism may include, but are not limited to: movement of components within the pressure relief mechanism to form an exhaust channel, rupture, breakage, tearing, or opening of at least a portion of the pressure relief mechanism, etc. When the pressure relief mechanism is actuated, the high-temperature, high-pressure substances inside the battery cell 11 are discharged outwards from the actuated portion as waste. This method enables the battery cell 11 to release pressure and temperature under controllable pressure or temperature conditions, thereby reducing the potential for more serious accidents.

[0129] In some embodiments, when the housing is a non-sealed structure, the pressure relief mechanism can be configured as a through hole for discharging gas inside the battery cell 11.

[0130] The emissions from the battery cell 11 mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0131] The positive and negative electrodes can be drawn from the same end of the electrode plate, or they can be drawn from opposite ends of the electrode plate.

[0132] The structures of the positive and negative electrode tabs can be the same or different. Taking the positive electrode tab as an example, the positive electrode tab can include multiple positive electrode tab layers, which are stacked together to form the positive electrode tab. The positive electrode tab can include at least two parts: one part is located between the main body of the electrode sheet and the insulating component, and the other part is located between the insulating component and the electrode lead-out component.

[0133] The insulating component can insulate at least part of the tab from the end face of the main body, thereby reducing the risk of the tab being inserted into the main body when the battery cell 11 is affected by external impacts, vibrations, etc., thereby reducing the risk of short circuit in the battery cell 11 and improving the reliability of the battery cell 11.

[0134] The insulating component can be a one-piece structure or a modular structure. As one example, the insulating component is composed of multiple independently formed parts connected together. As another example, the insulating component is formed as a single piece by stamping.

[0135] For example, the insulating part is made of plastic. The insulating part is integrally molded by injection molding. Plastic parts are easy to process and have low manufacturing costs.

[0136] In some embodiments of this application, the housing includes a shell and an end cap, the shell having an opening, the end cap being connected to the shell and closing the opening, the end cap forming a first sidewall, and a pressure relief mechanism being disposed on the end cap.

[0137] In some embodiments of this application, the outer casing can be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc. In some embodiments, the outer casing can be a sealed structure or a non-sealed structure. As an example, when the outer casing is a non-sealed structure, the outer casing serves to protect the electrode assembly, and a sealing bag is included between the outer casing and the electrode assembly. The sealing bag is used to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag can be a bag-shaped insulating component or an aluminum-plastic film. When the outer casing is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte. The casing may have one or more openings. End caps may also be provided one or more.

[0138] In addition, the connection methods between the end cap and the housing include, but are not limited to, snap-fit, adhesive, welding or connection via connectors.

[0139] In some embodiments of this application, the battery cell 11 further includes electrode terminals, which are disposed on the end cap and electrically connected to the electrode assembly. The electrode terminals are electrically connected to the tabs of the electrode assembly. The electrode terminals can be directly connected to the tabs or indirectly connected to the tabs through a current collector. The electrode terminals can be disposed on the end cap or on the housing. In the embodiments shown in this application, the electrode terminals are disposed on the end cap.

[0140] like Figures 3 to 10 As shown, in some embodiments of this application, a battery device 100 is proposed. The battery device 100 includes a housing 20, a battery cell assembly 10, and a current guide 30. The housing 20 includes a receiving space 222 and a first surface 221 and a second surface 223. The first surface 221 faces the receiving space 222 and intersects with a first direction X. The second surface 223 intersects with the first surface 221. The first direction X is consistent with the height direction of the housing 20. The battery cell assembly 10 is disposed within the receiving space 222 and supported by the first surface 221. Along the second direction Y, there is a space between the battery cell assembly 10 and the second surface 223. The second direction Y is consistent with the length or width direction of the housing 20. The flow guide 30 is disposed in the receiving space 222. The flow guide 30, the battery cell assembly 10, the first surface 221 and the second surface 223 enclose the glue injection space 34. The flow guide 30 has a flow guiding structure on the side facing the glue injection space 34. The flow guiding structure forms multiple flow guiding channels 35. The multiple flow guiding channels 35 are configured to guide the glue outside the glue injection space 34 to the inside of the glue injection space 34.

[0141] Specifically, the shape of the receiving space 222 is consistent with the shape of the battery cell assembly 10, and the outer contour size of the battery cell is slightly smaller than that of the receiving space 222, so that the battery cell assembly 10 can be effectively placed into the receiving space 222.

[0142] The receiving space 222 has an opening for inserting the battery cell assembly 10 into it. A first surface 221 is positioned opposite the opening. When the battery cell assembly 10 is placed into the receiving space 222, it can directly or indirectly abut against the first surface 221, providing support (i.e., the battery cell assembly 10 is supported by the first surface 221). The housing 20 includes a second surface 223, which surrounds and connects to the circumferential edge of the first surface 221. The second surface 223 and the first surface 221 enclose the receiving space 222. When the battery cell assembly 10 is placed within the receiving space 222, it is spaced apart from the second surface 223 on at least one side in the second direction Y. The gap between the battery cell assembly 10 and the second surface 223 constitutes the spacer space, which needs to be filled with adhesive to secure the housing 20 to the battery assembly.

[0143] When assembling the battery device 100, the battery cell assembly 10 is placed within the receiving space 222 of the housing 20, and the flow guide 30 is placed within the space between the battery cell assembly 10 and the receiving space 222. Adhesive is injected into each flow channel 35 through the injection port 40 using an adhesive injection device. The adhesive flows along the flow channels 35 and reaches the location where adhesive needs to be injected.

[0144] In this application, a flow guide 30 is provided, and multiple flow guide channels 35 are constructed through the flow guide structure. During the glue injection process, the glue flows along the multiple flow guide channels 35 respectively, which improves the uniformity of glue flow and reduces the situation of glue overflowing under unrestrained conditions, thereby improving the glue injection quality of the battery device 100 and increasing the yield of the battery device 100.

[0145] It should be understood that after the glue injection operation is completed and the glue cures, the guide component 30 is fixed in the receiving space 222 of the housing 20. The guide component 30 guides the glue during the glue injection process so that the glue can be injected along the set path. After the glue cures, it can be fixed in the housing 20, which can improve the overall structural strength of the battery device 100.

[0146] In addition, adhesives include silicone, epoxy resin, and polyurethane adhesives. Adhesives can have only bonding and fixing functions, or they can have both bonding and fixing functions as well as thermal conductivity.

[0147] It should be noted that the flow guiding structure can be a raised block structure formed on the flow guiding component, or it can be a flow guiding rib formed on the flow guiding component. For example, when the flow guiding structure is a raised block structure, the flow guiding channel can be a channel structure formed on the raised block structure. For example, when the flow guiding structure is a flow guiding rib, the flow guiding channel can be a channel structure formed by the flow guiding rib itself or by the flow guiding rib and other structures.

[0148] In some embodiments of this application, such as Figure 5 , Figure 8 and Figure 10 As shown, the flow guide 30 includes a main body 31 and a plurality of flow guide ribs 36. Along the first direction X, the main body 31 is opposite to and spaced apart from the first surface 221. The plurality of flow guide ribs 36 are disposed on the side of the main body 31 facing the first surface 221 and form a flow guide structure. The plurality of flow guide ribs 36 construct a plurality of flow guide channels 35.

[0149] Specifically, when the flow guide 30 is placed in the space between the battery cell and the housing 20, the main body 31 divides the space. The side of the main body 31 facing the first surface 221, the battery cell assembly 10, the first surface 221 and the second surface 223 enclose the glue injection space 34.

[0150] The guide ribs 36 are disposed on the side of the main body 31 facing the first surface 221, and extend towards the first surface 221. The guide ribs 36 divide the glue injection space 34, thereby forming multiple flow channels 35. The guide ribs 36 have a straight structure, which physically constrains the glue entering the flow channels 35, causing the glue to flow along a preset path, reducing the free diffusion of glue and thus reducing glue overflow.

[0151] In addition, the use of multiple guide ribs 36 to divide multiple guide channels 35 can improve the guiding effect of the adhesive, so as to balance the pressure of the adhesive front during the injection process, so that the adhesive can be filled more evenly.

[0152] It should be understood that multiple guide ribs 36 are provided on the side of the main body 31 facing the first surface 221, and the multiple guide ribs 36 can be evenly distributed or unevenly distributed.

[0153] In addition, the structures of the multiple guide ribs 36 can be all the same, partially the same, or all different.

[0154] It should be noted that the guide rib 36 can be an integral part of the main body 31 or a separate part. For example, when the guide rib 30 is a plastic part, the main body 31 and the guide rib 36 can be processed by injection molding in one step.

[0155] In addition, the flow guide 30 also includes a positioning pin and a clamping mechanism (such as a bolt or quick clamp). The positioning pin is installed at the bottom of the main body 31 and can cooperate with the preset positioning hole on the housing 20 to achieve precise positioning. The clamping mechanism is used to temporarily but firmly press the main body 31 onto the housing 20 or the battery cell assembly 10, reducing the displacement of the flow guide 30 caused by the injection pressure.

[0156] In some embodiments of this application, such as Figure 5 As shown, multiple guide ribs 36 are spaced apart along the third direction Z, and a guide channel 35 is formed between two adjacent guide ribs 36. The first direction X, the second direction Y and the third direction Z intersect each other.

[0157] Specifically, the flow guide 30 is disposed within the receiving space 222 of the housing 20. The battery cell assembly 10 is spaced apart from the second surface 223 along the second direction Y, forming a gap space. The gap space extends along the third direction Z. Multiple flow guide ribs 36 are arranged at intervals along the third direction Z, so that multiple flow guide channels 35 are arranged along the third direction Z. This allows the flow guide channels 35 formed by the multiple flow guide ribs 36 to connect with the gaps between the battery cell and other structures, thereby improving the filling effect of the adhesive and further enhancing the quality of the adhesive application.

[0158] It should be noted that the multiple guide ribs 36 are spaced apart along the third direction Z. The spacing can be equal or unequal.

[0159] In some embodiments of this application, such as Figure 2 and Figure 3 As shown, the battery cell assembly 10 includes a plurality of battery cells arranged along the third direction Z. At least a portion of the battery cells are arranged in a manner with a transition position 12 between two adjacent battery cells. The transition position 12 is arranged opposite to a guide rib 36.

[0160] Specifically, along the third direction Z, two adjacent battery cells can abut against each other, or a buffer can be set. During the glue injection process, if glue enters between two adjacent battery cells, it will affect the flow direction of the glue. By setting the guide rib 36 opposite to the transition position 12 between two adjacent battery cells, the guide rib 36 can block the transition position 12. This setting can reduce the situation where glue enters into the transition position 12 during the glue injection process and affects the flow direction of the glue, thereby further improving the glue injection quality of the battery device 100.

[0161] In some embodiments of this application, such as Figures 8 to 10 As shown, the guide rib 36 is a plate-like structure, which is perpendicular to the first surface 221 and the third direction Z.

[0162] Specifically, the plate-like structure has its surface perpendicular to the third direction Z, and the plate surface extends along the first direction X and the second direction Y. During the glue injection operation, the glue is injected along the first direction X. This configuration increases the contact area with the glue using the plate-like structure, thereby improving the guiding performance of the glue and further enhancing the flow directionality of the glue, thus further improving the glue injection quality of the battery device 100.

[0163] It should be noted that among the multiple guide ribs 36, the thickness of the guide ribs 36 (the dimension of the guide ribs 36 along the third direction Z) can be all the same, partially the same, or all different.

[0164] In some embodiments of this application, such as Figure 5 and Figure 10 As shown, the plurality of guide ribs 36 include a first guide rib 32 and a second guide rib 33. There are multiple first guide ribs 32, and each first guide rib 32 has a first dimension L1 along the third direction Z. There are multiple second guide ribs 33, and each second guide rib 33 has a second dimension L2 along the third direction Z. The second dimension L2 is smaller than the first dimension L1.

[0165] Specifically, the main body 31 is a plate-shaped component, and multiple guide ribs 36 are respectively connected to the side of the main body 31 facing the first surface 221 and extend in the direction of the first surface 221. Adjacent two guide ribs 36, the second surface 223, and the battery cell assembly 10 form a guide channel 35. The multiple guide ribs 36 are arranged at intervals along the third direction Z. Among them, first guide ribs 32 and second guide ribs 33 are respectively provided, and the first dimension L1 of the first guide rib 32 and the second dimension L2 of the second guide rib 33 are set to improve the structural strength of the main body 31, thereby giving the guide component 30 better structural strength and reducing the possibility of damage to the guide component 30 during transportation.

[0166] In addition, by setting the second dimension L2 to be smaller than the first dimension L1, the second guide rib 33 can be thinner than the first guide rib 32. This reduces the material used in the guide component 30, thereby effectively reducing the manufacturing cost of the guide component 30.

[0167] It should be noted that in this application, the guide ribs 36 that are arranged opposite each other at the transition positions 12 of two adjacent battery cells along the third direction Z are the first guide ribs 32, and the first dimension L1 of the first guide ribs 32 is greater than or equal to the dimension of the transition position 12 along the third direction Z, so as to improve the blocking effect on the adhesive.

[0168] In some embodiments of this application, such as Figure 5 and Figure 10As shown, at least one second guide rib 33 is provided between two adjacent first guide ribs 32.

[0169] Specifically, there are multiple first guide ribs 32 and second guide ribs 33. By setting the arrangement of the first guide ribs 32 and second guide ribs 33, the structural strength of the guide component 30 can be made uniform, which can further improve the structural stability of the guide component 30 and reduce the damage such as breakage of the guide component 30 due to insufficient strength during transportation.

[0170] In some embodiments of this application, such as Figure 5 and Figure 10 As shown, the first dimension L1 is in the range of 3 mm to 4 mm.

[0171] Specifically, setting the first dimension L1 within the range of 3 mm to 4 mm can further improve the structural strength of the guide 30, thereby reducing the risk of breakage or other damage to the guide 30 during transport due to insufficient strength.

[0172] It should be noted that the specific value of the first dimension L1 can be 3 mm, 3.1 mm, 3.2 mm, 3.3 mm, 3.4 mm, 3.5 mm, 3.6 mm, 3.7 mm, 3.8 mm, 3.9 mm, or 4 mm.

[0173] In some embodiments of this application, such as Figure 5 and Figure 10 As shown, the second dimension L2 is in the range of 1 mm to 2 mm.

[0174] Specifically, setting the second dimension L2 within the range of 1 mm to 2 mm can further improve the structural strength of the guide 30, thereby reducing the risk of breakage or other damage to the guide 30 during transport due to insufficient strength.

[0175] It should be noted that the specific values ​​of the second dimension L2 can be 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, or 2 mm.

[0176] In some embodiments of this application, such as Figure 5 and Figure 10 As shown, along the first direction X, the guide rib 36 abuts against the first surface 221, and the maximum distance between the main body 31 and the first surface 221 is less than the maximum distance between the battery cell assembly 10 and the first surface 221. A glue inlet 40 is formed between the circumferential edge of the main body 31 and the battery cell assembly 10 and / or the second surface 223, allowing glue to flow into multiple guide channels 35.

[0177] This configuration allows the flow channel 35 formed by the flow guide 30 to reach the position of the first surface 221 of the housing 20, effectively reaching the first surface 221 with glue and uniformly filling between the housing 20 and the battery cell, thereby further improving the glue injection effect of the battery device 100.

[0178] In some embodiments of this application, the guide rib 36 and the main body 31 are integrally formed. This arrangement reduces processing steps and improves processing efficiency.

[0179] In some embodiments of this application, such as Figure 3 and Figure 4 As shown, along the third direction Z, the size of the main body 31 is greater than or equal to the size of the battery cell assembly 10, and the first direction X, the second direction Y and the third direction Z intersect each other.

[0180] Specifically, the flow guide 30 is disposed within the receiving space 222 of the housing 20. The battery cell assembly 10 is spaced apart from the second surface 223 along the second direction Y, forming a gap space. The gap space extends along the third direction Z. Along the first direction X, the main body 31 of the flow guide 30 is disposed opposite to the first surface 221. A plurality of flow guide ribs 36 are disposed on the side of the main body 31 facing the first surface 221, and the plurality of flow guide ribs 36 are spaced apart along the third direction Z. A flow guide channel 35 is formed between two adjacent flow guide ribs 36, the battery cell assembly 10, and the side wall of the receiving cavity, so that the glue injection port 40 can communicate with the glue injection position through the flow guide channel 35.

[0181] The main body 31 is configured such that its size along the third direction Z is greater than or equal to the size of the battery cell assembly 10. This configuration allows the flow guide 30 to fully cover the battery cell assembly 10 in the third direction Z, thereby reducing blind spots in the glue application and further improving the glue application quality of the battery device 100, which in turn further improves the yield of the battery device 100.

[0182] In some embodiments of this application, such as Figures 3 to 5 As shown and Figures 8 to 10 As shown, the main body 31 includes a plurality of overflow holes 310, which are spaced apart along the third direction Z. Each guide channel 35 is connected to an overflow hole 310, and the first direction X, the second direction Y and the third direction Z intersect each other.

[0183] Specifically, the flow guide 30 is disposed between the battery cell assembly 10 and the second surface 223. The flow guide 30 divides the flow channel 35 in the receiving space 222 to guide the flow direction of the adhesive. In this way, the adhesive can be constrained to improve the effect of adhesive injection.

[0184] During the assembly of the battery device 100, the amount of glue injected needs to be controlled. If the amount of glue injected is insufficient, the connection strength will be reduced. If the amount of glue injected is excessive, on the one hand, the manufacturing cost will increase, and on the other hand, glue overflow will occur, affecting the product quality.

[0185] By providing an overflow hole 310 on the main body 31 of the flow guide 30, the height of the glue injection can be determined by whether glue overflows through the overflow hole 310 during the glue injection process. In this way, the height of the glue injection can be precisely controlled, which further improves the glue injection quality of the battery device 100 and enhances the product consistency of the battery device 100 during the production process.

[0186] It should be noted that the overflow hole 310 is provided through the main body 31 along the first direction X, and the shape of the overflow hole 310 includes, but is not limited to, a round hole, an elliptical hole, or a polygonal hole.

[0187] In addition, at least one overflow hole 310 is provided in each flow channel 35. For example, the main body 31 is provided with an overflow hole 310 at a position opposite to each flow channel 35. The overflow hole 310 is used to observe whether there is glue overflow in the flow channel 35 opposite to it. When glue overflows, it indicates that the glue injection height (the height of glue along the first direction X) at the glue injection position corresponding to the flow channel 35 has reached the preset requirement.

[0188] In some embodiments of this application, such as Figure 7 As shown, the overflow hole 310 is a stepped hole, which includes a first hole segment 315 and a second hole segment 316 coaxially connected. The diameter of the first hole segment 315 is smaller than the diameter of the second hole segment 316. The first hole segment 315 is located on the side of the second hole segment 316 facing the first surface 221. The first hole segment 315 is configured to allow glue to enter from the flow channel 35, and the second hole segment 316 is configured to allow glue to overflow from the first hole segment 315, so that a preset glue injection height is reached when there is glue in the second hole segment 316.

[0189] Specifically, the first orifice 315 and the second orifice 316 are coaxially connected, with the first orifice 315 located between the first surface 221 and the second orifice 316. During the glue injection operation, the glue level in the guide channel 35 rises as glue is injected. The glue enters the first orifice 315 through the end opposite to the second orifice 316. As the glue level continues to rise, the glue enters the second orifice 316 through the first orifice 315. Once the glue enters the second orifice 316, it can be determined that the preset glue injection height has been reached.

[0190] The first hole segment 315 and the second hole segment 316 are formed into a stepped structure. The stepped structure is used to contain the overflowing glue. In this way, the glue injection height can be effectively judged, while reducing the situation of glue overflow, thus further improving the glue injection quality of the battery device 100.

[0191] It should be noted that the orifice shape of the first hole section 315 and the orifice shape of the second hole section 316 can be the same or different. For example, the orifice shape of the first hole section 315 and the orifice shape of the second hole section 316 can both be circular. This arrangement facilitates processing and improves processing efficiency.

[0192] In some embodiments of this application, the size of the second hole segment 316 along the first direction X is in the range of 4 mm to 5 mm.

[0193] Specifically, the size of the second hole segment 316 along the first direction X is set in the range of 4 mm to 5 mm. This ensures that the glue can effectively overflow during the glue injection process while reducing the impact of the opening on the structural strength of the guide 30.

[0194] It should be noted that the dimensions of the second hole segment 316 along the first direction X can be 4 mm, 4.1 mm, 4.2 mm, 4.3 mm, 4.4 mm, 4.5 mm, 4.6 mm, 4.7 mm, 4.8 mm, 4.9 mm, or 5 mm.

[0195] In some embodiments of this application, the diameter of the second hole segment 316 is in the range of 3 mm to 4 mm.

[0196] Specifically, the diameter of the second hole section 316 is set in the range of 3 mm to 4 mm, which ensures that the glue can effectively overflow during the glue injection process while reducing the impact of the opening on the structural strength of the guide 30.

[0197] It should be noted that the dimensions of the second hole segment 316 along the first direction X can be 3 mm, 3.1 mm, 3.2 mm, 3.3 mm, 3.4 mm, 3.5 mm, 3.6 mm, 3.7 mm, 3.8 mm, 3.9 mm, or 4 mm.

[0198] In some embodiments of this application, such as Figures 3 to 5 As shown and Figures 8 to 10As shown, the plurality of adhesive overflow holes 310 include a first adhesive overflow hole 313, a second adhesive overflow hole 312, and a third adhesive overflow hole 314. Along the third direction Z, the second adhesive overflow hole 312 and the third adhesive overflow hole 314 are located on opposite sides of the first adhesive overflow hole 313. The minimum distance between the first adhesive overflow hole 313 and the first surface 221 is a first distance D1, the distance between the second adhesive overflow hole 312 and the first surface 221 is a second distance D2, and the distance between the third adhesive overflow hole 314 and the first surface 221 is a third distance D3. The first distance D1 is greater than the second distance D2, and the second distance D2 is greater than the third distance D3.

[0199] Specifically, by setting overflow holes 310 at different distances from the first surface 221, a single flow guide 30 can meet the observation requirements of various flow heights, thereby improving the versatility of the flow guide 30, reducing the need for multiple specifications of flow guide 30, and lowering production and processing costs.

[0200] It should be understood that the main body 31 is provided with a first protrusion structure and a second protrusion structure. Both the first protrusion structure and the second protrusion structure are provided to protrude towards the first surface 221. The protrusion height of the first protrusion structure is less than the protrusion height of the second protrusion structure. The second overflow hole 312 is opened on the first protrusion structure, and the third overflow hole 314 is opened on the second protrusion structure.

[0201] For example, when the glue injection height is the height of the third overflow hole 314, glue injection can be stopped once the glue enters the third overflow hole 314 (at this time, no glue overflows from the first overflow hole 313 and the second overflow hole 312); when the glue injection height is the height of the second overflow hole 312, glue injection can be stopped once the glue enters the second overflow hole 312 (at this time, no glue overflows from the first overflow hole 313, but glue overflows from the third overflow hole 314); when the glue injection height is the height of the first overflow hole 313, glue injection can be stopped once the glue enters the first overflow hole 313 (at this time, glue overflows from the second overflow hole 312 and the third overflow hole 314).

[0202] In some embodiments of this application, such as Figure 5 and Figure 10 As shown, the first overflow hole 313, the second overflow hole 312 and the third overflow hole 314 constitute an overflow monitoring structure 311. Along the third direction Z, the main body 31 is provided with multiple overflow monitoring structures 311.

[0203] Specifically, along the third direction Z, the second overflow hole 312 and the third overflow hole 314 are located on opposite sides of the first overflow hole 313. The three overflow holes 310 constitute an overflow monitoring structure 311, which can monitor the three overflow heights. Along the third direction Z, the main body 31 is provided with multiple overflow monitoring structures 311, which can effectively monitor the glue injection height at multiple locations along the third direction Z, thereby improving the uniformity of glue injection and further enhancing the glue injection effect.

[0204] like Figure 1 As shown, a second aspect of this application provides an electrical device comprising a battery device 100 as described above.

[0205] In this application, a flow guide 30 is provided in the battery device 100, and multiple flow channels 35 are formed by the flow guide 30. During the glue injection process, the glue flows along the multiple flow channels 35 respectively, which improves the uniformity of glue flow and reduces the situation of glue overflowing under unrestrained conditions, thereby improving the glue injection quality of the battery device 100 and increasing the yield of the battery device 100.

[0206] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below.

[0207] In the embodiments of this application, such as Figures 3 to 10 As shown, this application proposes a battery device 100, which includes a housing 20, a battery cell assembly 10, and a current guide 30. The housing 20 includes a receiving space 222 and a first surface 221 and a second surface 223. The first surface 221 faces the receiving space 222 and intersects with a first direction X. The second surface 223 intersects with the first surface 221. The first direction X is consistent with the height direction of the housing 20. The battery cell assembly 10 is disposed within the receiving space 222 and supported by the first surface 221, and flows along the second direction X. In the direction Y, there is a gap between the battery cell assembly 10 and the second surface 223. The second direction Y is consistent with the length or width direction of the housing 20. The flow guide 30 is disposed in the receiving space 222. The flow guide 30, the battery cell assembly 10, the first surface 221 and the second surface 223 enclose the glue injection space 34. The flow guide 30 has a flow guiding structure on the side facing the glue injection space 34. The flow guiding structure forms multiple flow guiding channels 35. The multiple flow guiding channels 35 are configured to guide the glue outside the glue injection space 34 to the inside of the glue injection space 34.

[0208] In this application, a flow guide 30 is provided, and multiple flow guide channels 35 are constructed through the flow guide structure. During the glue injection process, the glue flows along the multiple flow guide channels 35 respectively, which improves the uniformity of glue flow and reduces the situation of glue overflowing under unrestrained conditions, thereby improving the glue injection quality of the battery device 100 and increasing the yield of the battery device 100.

[0209] Furthermore, the flow guide 30 includes a main body 31 and a plurality of flow guide ribs 36. Along the first direction X, the main body 31 is opposite to and spaced apart from the first surface 221. The plurality of flow guide ribs 36 are disposed on the side of the main body 31 facing the first surface 221 and form a flow guide structure, thereby constructing a plurality of flow guide channels 35. Along the third direction Z, the plurality of flow guide ribs 36 are spaced apart, and a flow guide channel 35 is formed between two adjacent flow guide ribs 36. The first direction X, the second direction Y, and the third direction Z intersect each other.

[0210] Furthermore, the battery cell assembly 10 includes a plurality of battery cells arranged along the third direction Z, with at least a portion of the battery cells arranged in a manner such that there is a transition position 12 between two adjacent battery cells, and the transition position 12 is arranged opposite to a guide rib 36.

[0211] Furthermore, the guide ribs 36 are plate-like structures, which are perpendicular to the first surface 221 and the third direction Z, respectively. The plurality of guide ribs 36 includes first guide ribs 32 and second guide ribs 33. There are multiple first guide ribs 32, each having a first dimension L1 along the third direction Z. There are also multiple second guide ribs 33, each having a second dimension L2 along the third direction Z, where the second dimension L2 is smaller than the first dimension L1.

[0212] Furthermore, at least one second guide rib 33 is provided between two adjacent first guide ribs 32, with the first dimension L1 ranging from 3 mm to 4 mm and the second dimension L2 ranging from 1 mm to 2 mm.

[0213] Furthermore, along the first direction X, the guide rib 36 abuts against the first surface 221, and the maximum distance between the main body 31 and the first surface 221 is less than the maximum distance between the battery cell assembly 10 and the first surface 221. A glue injection port 40 is formed between the circumferential edge of the main body 31 and the battery cell assembly 10 and / or the second surface 223, and the glue injection port 40 allows glue to flow into multiple guide channels 35.

[0214] Furthermore, the guide rib 36 and the main body 31 are an integral structure.

[0215] Furthermore, along the third direction Z, the size of the main body 31 is greater than or equal to the size of the battery cell assembly 10, and the first direction X, the second direction Y and the third direction Z intersect each other.

[0216] Furthermore, the main body 31 includes a plurality of overflow holes 310, which are spaced apart along a third direction Z. Each guide channel 35 is connected to one overflow hole 310, and the first direction X, the second direction Y, and the third direction Z intersect each other. The overflow hole 310 is a stepped hole, which includes a first hole segment 315 and a second hole segment 316 coaxially connected. The diameter of the first hole segment 315 is smaller than the diameter of the second hole segment 316. The first hole segment 315 is located on the side of the second hole segment 316 facing the first surface 221. The first hole segment 315 is configured to allow glue to enter from the guide channel 35, and the second hole segment 316 is configured to allow glue to overflow from the first hole segment 315, so that when there is glue in the second hole segment 316, a preset glue injection height is reached.

[0217] Furthermore, along the first direction X, the size of the second hole segment 316 is in the range of 4 mm to 5 mm, and the diameter of the second hole segment 316 is in the range of 3 mm to 4 mm.

[0218] Furthermore, the plurality of overflow holes 310 includes a first overflow hole 313, a second overflow hole 312, and a third overflow hole 314. Along the third direction Z, the second overflow hole 312 and the third overflow hole 314 are located on opposite sides of the first overflow hole 313. The minimum distance between the first overflow hole 313 and the first surface 221 is a first distance D1, the distance between the second overflow hole 312 and the first surface 221 is a second distance D2, and the distance between the third overflow hole 314 and the first surface 221 is a third distance D3. The first distance D1 is greater than the second distance D2, and the second distance D2 is greater than the third distance D3. The first overflow hole 313, the second overflow hole 312, and the third overflow hole 314 constitute an overflow monitoring structure 311. Along the third direction Z, the main body 31 is provided with a plurality of overflow monitoring structures 311.

[0219] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The battery device includes: The box includes a receiving space, and the box includes a first surface and a second surface. The first surface faces the receiving space and intersects with a first direction, and the second surface intersects with the first surface. The first direction is consistent with the height direction of the box. A battery cell assembly, wherein the battery cell assembly is disposed within the receiving space and supported by the first surface, and there is a gap between the battery cell assembly and the second surface along the second direction, wherein the second direction is consistent with the length direction or width direction of the housing; A flow guide is disposed within the receiving space. The flow guide, together with the battery cell assembly, the first surface, and the second surface, encloses an adhesive injection space. The flow guide has a flow guiding structure on the side facing the adhesive injection space. The flow guiding structure forms multiple flow guiding channels, which are configured to guide adhesive from outside the adhesive injection space to inside the adhesive injection space.

2. The battery device as claimed in claim 1, characterized in that, The flow guide includes: The main body portion is disposed opposite to and spaced apart from the first surface along the first direction; Multiple guide ribs are provided on the side of the main body facing the first surface and constitute the guide structure, and the multiple guide ribs form the multiple guide channels.

3. The battery device as claimed in claim 2, characterized in that, Along a third direction, the plurality of guide ribs are spaced apart, and a guide channel is formed between two adjacent guide ribs. The first direction, the second direction and the third direction intersect each other.

4. The battery device as claimed in claim 3, characterized in that, The battery cell assembly includes multiple battery cells, and at least a portion of the battery cells are arranged along the third direction. There is a transition position between two adjacent battery cells, and the transition position is arranged opposite to one of the guide ribs.

5. The battery device as claimed in claim 3, characterized in that, The guide ribs are plate-shaped structures, and the plate-shaped structures are perpendicular to the first surface and the third surface, respectively.

6. The battery device as claimed in claim 5, characterized in that, The plurality of guide ribs include: The first guide rib, the number of the first guide ribs is multiple, and the first guide rib has a first dimension along the third direction; The second guide rib, there are multiple second guide ribs, the second guide ribs have a second dimension along the third direction, the second dimension is smaller than the first dimension.

7. The battery device as claimed in claim 6, characterized in that, At least one second guide rib is provided between two adjacent first guide ribs; And / or, the first dimension is in the range of 3 mm to 4 mm; And / or, the second dimension is in the range of 1 mm to 2 mm.

8. The battery device as claimed in claim 2, characterized in that, Along the first direction, the guide rib abuts against the first surface, and the maximum distance between the main body and the first surface is less than the maximum distance between the battery cell assembly and the first surface. A glue injection port is formed between the circumferential edge of the main body and the battery cell assembly and / or the second surface, and the glue injection port allows glue to flow into the multiple guide channels. And / or, the guide rib and the main body are an integral structure.

9. The battery device as claimed in claim 2, characterized in that, Along a third direction, the size of the main body is greater than or equal to the size of the battery cell assembly, and the first direction, the second direction, and the third direction intersect each other.

10. The battery device according to any one of claims 2 to 9, characterized in that, The main body includes a plurality of overflow holes, which are spaced apart along a third direction. Each of the flow channels is connected to one of the overflow holes, and the first direction, the second direction, and the third direction intersect each other.

11. The battery device as claimed in claim 10, characterized in that, The overflow hole is a stepped hole, which includes a first hole segment and a second hole segment connected coaxially. The diameter of the first hole segment is smaller than the diameter of the second hole segment, and the first hole segment is located on the side of the second hole segment facing the first surface. The first orifice is configured to allow adhesive to enter the flow channel, and the second orifice is configured to allow adhesive to overflow from the first orifice, so as to determine that a preset adhesive injection height is reached when there is adhesive in the second orifice.

12. The battery device as claimed in claim 11, characterized in that, Along the first direction, the size of the second hole segment is in the range of 4 mm to 5 mm; And / or, the diameter of the second hole segment is in the range of 3 mm to 4 mm.

13. The battery device as claimed in claim 11, characterized in that, The plurality of overflow holes includes a first overflow hole, a second overflow hole, and a third overflow hole. Along a third direction, the second overflow hole and the third overflow hole are located on opposite sides of the first overflow hole. Wherein, the minimum distance between the first overflow hole and the first surface is the first distance, the distance between the second overflow hole and the first surface is the second distance, and the distance between the third overflow hole and the first surface is the third distance. The first distance is greater than the second distance, and the second distance is greater than the third distance.

14. The battery device as claimed in claim 13, characterized in that, The first overflow hole, the second overflow hole, and the third overflow hole constitute an overflow monitoring structure. Along the third direction, the main body is provided with a plurality of the overflow monitoring structures.

15. An electrical appliance, characterized in that, The electrical equipment includes a battery device according to any one of claims 1 to 14.

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