Battery, power consuming device, method of manufacturing battery, and apparatus

Abstract

This application provides a battery, an electrical device, a method for manufacturing the battery, and equipment. The battery includes: a housing, including sidewalls for enclosing and forming a cavity, the sidewalls having vents; a battery cell pack, disposed within the cavity and including multiple battery cells stacked in layers; and an end plate, disposed within the cavity and located between the battery cell pack and the sidewalls, the end plate covering the vents, and the end plate having a flow channel for connecting the cavity and the vents. In this application, the flow channel on the end plate guides the gas generated within the battery, allowing the gas to be quickly and promptly discharged from the housing along the flow channel, ensuring smooth venting and improving battery safety. Simultaneously, the flow channel being located on the end plate avoids the flow channel occupying space within the housing, thus maximizing space utilization within the housing and increasing the battery's energy density.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] Improving battery energy density is an important direction for the development of the battery industry. Improving the space utilization rate inside the battery box can effectively improve the battery energy density. However, improving the space utilization rate of the existing battery box will affect the battery's ventilation, thereby affecting battery safety. Summary of the Invention

[0004] This application provides a battery, an electrical device, a method for manufacturing the battery, and an apparatus. The battery can effectively improve the venting of the battery and enhance its safety performance.

[0005] In a first aspect, this application provides a battery, comprising: a housing including a sidewall for enclosing and forming a accommodating cavity, the sidewall having an exhaust port; a battery cell assembly disposed within the accommodating cavity and comprising a plurality of battery cells, the plurality of battery cells being stacked in layers; and an end plate disposed within the accommodating cavity and located between the battery cell assembly and the sidewall, the end plate covering the exhaust port, the end plate being provided with a flow guiding channel for connecting the accommodating cavity and the exhaust port.

[0006] In the above technical solution, the side wall of the battery casing is provided with an exhaust port, and the end plate is provided with a flow guiding channel. The flow guiding channel connects the housing cavity of the casing and the exhaust port. The flow guiding channel can guide the gas generated inside the battery, allowing the gas generated inside the battery to quickly and timely reach the exhaust port of the casing and finally be discharged from the casing, ensuring the smooth flow of battery gas and improving battery safety. At the same time, the design of the flow guiding channel and the exhaust port can effectively prevent gas from stagnating or flowing inside the casing, thereby reducing the risk of high-temperature and high-pressure gas damaging the components inside the battery and protecting the normal performance of the battery.

[0007] The flow channel is located on the end plate, which can directly cover the exhaust port of the box. This structure avoids the flow channel occupying space inside the box and avoids affecting the structural density inside the battery box. It helps to ensure the space utilization rate inside the box, thereby ensuring the overall energy density of the battery.

[0008] Moreover, in practical use, especially in the automotive industry, the battery and the user exist in the same space. The high temperature and high pressure gas generated by the battery can threaten the personal safety of the user. This application sets up an exhaust port and a flow channel to make the battery form a directional ejection path, which facilitates the guidance of airflow to be directionally ejected from the battery and discharged from the battery. This makes the exhaust direction of the battery controllable and further improves the safety of battery use.

[0009] In some embodiments, the housing further includes a top wall, the side walls surround the top wall, the battery cell group is located below the top wall, an exhaust gap is provided between the top wall and the battery cell group, and the flow channel is used to connect the exhaust gap and the exhaust port.

[0010] In the above technical solution, an exhaust gap is set between the battery cell group and the top wall of the box. The exhaust gap can further guide the gas discharged from the battery cell, so that the gas discharged from the battery cell can be discharged from the battery box through the exhaust gap, the guide channel and the exhaust port, avoiding the free dissipation of gas in the box, thereby further reducing the risk of safety hazards caused by gas retention in the box.

[0011] In some embodiments, along the thickness direction of the end plate, the flow channel is directly opposite the exhaust port or the projection of the flow channel and the exhaust port at least partially overlaps.

[0012] In the above technical solution, the guide channel and the exhaust port are directly opposite each other or at least partially overlap in projection, ensuring that there is an air passage surface between the guide channel and the exhaust port, so that the airflow passing through the guide channel can quickly and timely enter the exhaust port and be discharged through the exhaust port.

[0013] In some embodiments, the flow channel includes a vertical channel and a horizontal channel. The upper end of the vertical channel is connected to the accommodating cavity, and one end of the horizontal channel along the thickness direction is connected to the vertical channel, while the other end is connected to the exhaust port.

[0014] In the above technical solution, the flow channel includes a vertical channel and a horizontal channel that are interconnected. The upper end of the vertical channel is connected to the accommodating cavity, and the horizontal channel is connected to the vertical channel and the exhaust port. The connection structure between the vertical channel and the horizontal channel realizes the direction conversion of the flow channel. The exhaust port is set on the side wall of the box. The vertical channel guides the gas into the flow channel and then flows through the horizontal channel to the exhaust port set on the side wall of the box, so that the gas can be smoothly discharged from the battery along the horizontal channel and the exhaust port.

[0015] In some embodiments, the vertical channel does not penetrate the end plate in the vertical direction.

[0016] In the above technical solution, the vertical channel does not penetrate the end plate. On the one hand, it blocks and limits the vertical flow of gas, preventing high-temperature and high-pressure gas from flowing directly downwards along the vertical channel to the bottom of the box and stagnating there, thus affecting the directional emission of battery gas. On the other hand, the design that the vertical channel is not completely penetrating in the height direction of the end plate can effectively reduce the diffusion of high-temperature gas and prevent the airflow from directly reaching the bottom of the box and leaking to the battery cells near the end plate.

[0017] In some embodiments, the end plate includes: an end plate body having a first side facing the battery cell assembly and a second side facing away from the battery cell assembly, the first side abutting against the battery cell assembly; a plurality of first reinforcing ribs formed on the second side and abutting against the sidewall, the plurality of first reinforcing ribs being spaced apart in a vertical direction; wherein the plurality of first reinforcing ribs includes a top reinforcing rib, a middle reinforcing rib, and a bottom reinforcing rib, the vertical channel at least penetrates the top reinforcing rib, and the transverse channel is formed between two adjacent first reinforcing ribs.

[0018] In the above technical solution, the end plate includes an end plate body and reinforcing ribs formed on the end plate body. The reinforcing ribs effectively improve the structural strength of the end plate and enhance its resistance to deformation. Furthermore, compared to increasing the overall thickness of the end plate to increase its strength, the reinforcing ribs reduce the overall weight and material loss of the end plate while maintaining its structural strength, which is beneficial for reducing the weight and material cost of the battery. Additionally, by placing the flow channel on the reinforcing rib, and by vertically penetrating a portion of the first reinforcing rib according to the position of the exhaust port on the side wall, the flow channel can be directly formed on the first reinforcing rib, making implementation highly convenient.

[0019] In some embodiments, the top reinforcing rib has a first opening, the middle reinforcing rib has a second opening, the first opening and the second opening are interconnected to form the vertical channel, and the area of ​​the first opening is larger than the area of ​​the second opening.

[0020] In the above technical solution, the top reinforcing rib has a first opening with a large area. The first opening and the second opening are connected to form a vertical channel. The first opening can collect airflow and guide the gas to enter the vertical channel quickly.

[0021] In some embodiments, the top reinforcing rib is further provided with a clamping portion for cooperating with the end plate clamping mechanism.

[0022] In the above technical solution, the top reinforcing rib is provided with a clamping part, which makes it convenient for the clamping mechanism to act on the clamping part to clamp the end plate, thus facilitating the assembly of the end plate.

[0023] In some embodiments, the end plate further includes: a plurality of second reinforcing ribs formed on the second surface and abutting against the side wall, the plurality of second reinforcing ribs being arranged intersecting with the plurality of first reinforcing ribs, and each second reinforcing rib extending along the vertical direction.

[0024] In the above technical solution, the end plate includes a second reinforcing rib that is cross-shaped with the first reinforcing rib. The first and second reinforcing ribs form a mesh structure, which further improves the structural strength of the end plate.

[0025] In some embodiments, the vertical channel is located between two adjacent second reinforcing ribs.

[0026] In the above technical solution, the vertical channel is set between two adjacent second reinforcing ribs. The second reinforcing ribs act as interceptors and limiters of the airflow in the transverse flow channel, restricting the airflow along the transverse flow channel of the first reinforcing rib, and further improving the guiding effect of the guide channel on the airflow.

[0027] In some embodiments, the battery further includes a pressure relief mechanism disposed on the side wall, one end of the pressure relief mechanism being connected to the vent, and the pressure relief mechanism being configured to release the internal pressure when the internal pressure of the battery reaches a threshold.

[0028] In the above technical solution, the battery is equipped with a pressure relief mechanism that is connected to the exhaust port. By setting the pressure relief mechanism, the discharge frequency of the battery can be effectively controlled. When the pressure relief mechanism is in an unbraked state, it can prevent dust, water stains and other impurities from entering the box through the exhaust port.

[0029] Secondly, this application provides an electrical device including a battery as described in any of the above embodiments, wherein the battery is used to provide electrical energy.

[0030] Thirdly, this application provides a method for manufacturing a battery, comprising: providing a housing, the housing including a sidewall for enclosing and forming a receiving cavity, the sidewall having an exhaust port; providing a battery cell assembly, the battery cell assembly including a plurality of battery cells stacked in a layered arrangement; providing an end plate, the end plate having a flow guiding channel; and disposing the battery cell assembly and the end plate within the receiving cavity, such that the end plate is located between the battery cell assembly and the sidewall and covers the exhaust port, the flow guiding channel connecting the receiving cavity and the exhaust port.

[0031] Fourthly, this application provides a battery manufacturing apparatus, comprising: a providing module for providing a housing, a battery cell assembly, and an end plate, wherein the housing includes a side wall for enclosing and forming a receiving cavity, the side wall having an exhaust port, the battery cell assembly including a plurality of battery cells stacked together, and the end plate having a flow guiding channel; and an assembly module for assembling the battery cell assembly and the end plate within the receiving cavity, such that the end plate is located between the battery cell assembly and the side wall and covers the exhaust port, and the flow guiding channel connecting the receiving cavity and the exhaust port. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0033] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0034] Figure 2 Exploded views of a battery from a first-view perspective provided for some embodiments of this application;

[0035] Figure 3 Exploded views of a battery from a second perspective, provided for some embodiments of this application;

[0036] Figure 4 Partial front cross-sectional view of a battery provided for some embodiments of this application;

[0037] Figure 5 for Figure 4 The top view shown;

[0038] Figure 6 Axonometric view of an end plate provided in some embodiments of this application from a first perspective;

[0039] Figure 7 Axonometric view of an end plate provided in some embodiments of this application from a second perspective;

[0040] Figure 8 for Figure 2 A magnified view of part A shown;

[0041] Figure 9 for Figure 3 A magnified view of part B shown;

[0042] Figure 10 This is a schematic diagram showing the state of the sampling unit penetrating the end plate in some embodiments of this application;

[0043] Figure 11 for Figure 10 The diagram shows the mating structure of the sampling unit penetrating the end plate;

[0044] Figure 12 This is a schematic diagram of the end plate structure provided in some embodiments of this application;

[0045] Figure 13 A schematic flowchart illustrating a battery manufacturing method provided in some embodiments of this application;

[0046] Figure 14 A schematic block diagram of a battery manufacturing apparatus provided for some embodiments of this application;

[0047] The accompanying drawings are not drawn to scale.

[0048] Marking Explanation: 1000 - Vehicle; 100 - Battery; 10 - Battery Cell Pack; 11 - Battery Cell; 20 - Housing; 21 - Side Wall; 211 - Receptacle; 2111 - Exhaust Gap; 212 - Exhaust Port; 22 - Top Wall; 23 - Bottom Wall; 231 - Through Hole; 30 - End Plate; 31 - End Plate Body; 311 - First Surface; 312 - Second Surface; 32 - First Reinforcing Rib; 321 - Top Reinforcing Rib; 3211 - First Opening; 322 - Middle Reinforcing Rib; 3221 - Second Opening; 323 - Bottom Reinforcing Rib; 324 - Clearance Opening; 33 - Second Reinforcing Rib; 34 - Channel; 35 - Guide Channel; 351 - Vertical Channel; 352 - Horizontal Channel; 40 - Clamping Part; 50 - Pressure Relief Mechanism; 60 - Electrical Energy Lead-out component; 61-First segment; 62-Second segment; 63-Third segment; 64-Bending angle; 70-Sampling unit; 71-Sampling unit body; 72-Shielding part; 80-High voltage distribution box; 90-Output pole; 200-Controller; 300-Motor; 2000-Manufacturing equipment; 2100-First supply device; 2200-Second supply device; 2300-Third supply device; 2400-First assembly device; 2500-Second assembly device. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0050] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two).

[0056] 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," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0057] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "set," "install," "connect," "join," and "fix" 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, an electrical connection, or a signal 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0058] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0059] In this application, the battery cell may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application are not limited to these. The battery cell may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited to these. Battery cells are generally divided into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and the embodiments of this application are not limited to these.

[0060] The battery mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack. The battery may include a housing for encapsulating one or more battery cells. The housing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0061] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrodes. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector, and the uncoated positive current collector protrudes beyond the coated one, serving as the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector, and the uncoated negative current collector protrudes beyond the coated one, serving as the negative electrode tab. The negative electrode current collector can be made of copper, and the negative electrode active material can be carbon or silicon, etc. To ensure that a large current can pass through without melting, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together. The separator can be made of PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly can be a wound structure or a stacked structure, and the embodiments of this application are not limited to these.

[0062] Improving battery energy density is an important direction for the development of the battery industry. However, inventors have discovered that after increasing the energy density of existing batteries, there is a problem of poor venting, which seriously affects battery safety.

[0063] Research, simulation, and analysis revealed that the current battery technology aims to increase energy density by improving the space utilization rate within the battery box. However, this increases the space between the battery module and the box, resulting in a significant reduction in the space between the battery module and the box. The end plate of the battery module will be close to the box wall and cover the exhaust port of the box wall, making it impossible to form an effective exhaust path within the box. This affects the smoothness of battery exhaust, preventing the gas emitted by the battery cells from being discharged from the box in a timely and smooth manner.

[0064] Based on the above considerations, in order to effectively improve the venting performance of the battery while ensuring its energy density, the applicant provides a battery comprising a housing, the housing including a sidewall for enclosing and forming a cavity, the sidewall having a vent; a battery cell assembly disposed within the cavity and including multiple battery cells stacked in layers; and an end plate disposed within the cavity and located between the battery cell assembly and the sidewall, the end plate covering the vent, the end plate having a flow channel for connecting the cavity and the vent.

[0065] In this technical solution, the battery casing has an exhaust port on its side wall and a flow guide channel on its end plate. The flow guide channel connects the casing's accommodating cavity and the exhaust port. This channel guides the gas generated inside the battery, allowing it to quickly and promptly reach the exhaust port and exit the casing, ensuring smooth gas flow and improving battery safety. Simultaneously, the flow guide channel and exhaust port effectively prevent gas from stagnating or flowing within the casing, reducing the risk of high-temperature, high-pressure gas damaging internal battery components and protecting the battery's normal performance. Furthermore, the flow guide channel is located on the end plate, which directly covers the exhaust port. This structure avoids the flow guide channel occupying space within the casing, preventing any impact on the structural density of the battery casing and maximizing space utilization, thus ensuring the overall energy density of the battery.

[0066] Moreover, in practical use, especially in the automotive industry, the battery and the user exist in the same space. The high temperature and high pressure gas generated by the battery can threaten the personal safety of the user. This application sets up an exhaust port and a flow channel to make the battery form a directional ejection path, which facilitates the guidance of airflow to be directionally ejected from the battery and discharged from the battery. This makes the exhaust direction of the battery controllable, thereby improving the safety of battery use.

[0067] The batteries disclosed in this application can be used, but are not limited to, in electrical equipment such as vehicles, ships, or aircraft. The power system of such electrical equipment can be composed using the batteries disclosed in this application, which can effectively improve the battery's lifespan and performance.

[0068] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0069] The batteries described in the embodiments of this application are not limited to the electrical devices described above, but can also be applied to all electrical devices that use batteries. However, for the sake of brevity, the following embodiments use a vehicle as an example of an electrical device according to an embodiment of this application.

[0070] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments 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. A battery 100 is disposed inside the vehicle 1000, and the battery 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery 100 can be used to power the vehicle 1000; for example, the battery 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

[0071] In some other embodiments, the battery 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0072] In this application, the battery mentioned in the embodiments refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. Multiple battery cells can be connected in series, parallel, or a combination thereof to directly form a battery. A combination thereof means that multiple battery cells are connected in both series and parallel configurations. Alternatively, multiple battery cells can first be connected in series, parallel, or a combination thereof to form a battery cell group, and then multiple battery cell groups can be connected in series, parallel, or a combination thereof to form a battery.

[0073] Please refer to Figure 2 and Figure 3 and further refer to Figure 4 and Figure 5 , Figure 2 Exploded views of a battery from a first-view perspective provided for some embodiments of this application; Figure 3 Exploded views of a battery from a second perspective, provided for some embodiments of this application; Figure 4 Partial front cross-sectional view of a battery provided for some embodiments of this application; Figure 5 for Figure 4 The diagram shows a top view. Some embodiments of the battery 100 provided in this application include a housing 20, a battery cell assembly 10, and an end plate 30. The housing 20 includes a side wall 21 for enclosing and forming a receiving cavity 211, and the side wall 21 has an exhaust port 212. The battery cell assembly 10 is disposed within the receiving cavity 211 and includes multiple battery cells 11, which are stacked. The end plate 30 is disposed within the receiving cavity 211 and located between the battery cell assembly 10 and the side wall 21. The end plate 30 covers the exhaust port 212 and is provided with a flow channel 35 for connecting the receiving cavity 211 and the exhaust port 212.

[0074] The housing 20 provides a space for the battery cell pack 10, serving to store and protect it. The housing 20 can be a cuboid, cylinder, or elliptical cylinder, etc. The housing 20 includes sidewalls 21 that enclose and form a cavity 211. The sidewalls 21 can have various structures depending on the shape of the housing 20; for example, please refer to... Figure 2 The housing 20 may include a top wall 22, a side wall 21 and a bottom wall 23. The top wall 22 and the bottom wall 23 are arranged opposite to each other. The side wall 21 surrounds the bottom wall 23 and is a hollow structure with openings at both ends. The inner cavity of the side wall 21 forms a receiving cavity 211. The side wall 21 connects the top wall 22 and the bottom wall 23. The side wall 21, the top wall 22 and the bottom wall 23 together define a receiving space that can accommodate the battery cell pack 10.

[0075] In some embodiments, the top wall 22 and the side wall 21 can be integrally formed to form a housing, one end of which has an opening. The bottom wall 23 is separately disposed from the side wall 21, and the bottom wall 23 forms a cover structure. The bottom wall 23 covers the opening of the housing to enclose the battery cell pack 10 inside the housing.

[0076] In other embodiments, the bottom wall 23 and the side wall 21 may be integrally formed to form a housing, with an opening at one end of the housing. The top wall 22 and the side wall 21 may be separately provided, with the top wall 22 forming a cover structure. The top wall 22 covers the opening of the housing to enclose the battery cell pack 10 inside the housing.

[0077] For example, such as Figure 2 As shown, the housing 20 may include a separate top wall 22, a bottom wall 23 and a side wall 21. The side wall 21 forms a shell with openings at both ends. The bottom wall 23 and the top wall 22 respectively cover the two openings of the shell to form a closed space for accommodating the battery cell pack 10.

[0078] The shell formed by the side walls 21 can be rectangular, square, or other shapes, and the box 20 can be made of metal materials, such as aluminum, aluminum alloy, or nickel-plated steel. In some embodiments of this application, the box 20 can be hexahedral, and the top wall 22 and bottom wall 23 can be square or rectangular plate structures.

[0079] Specifically, the width of the housing 20 extends along the first direction X, the length extends along the second direction Y, and the height extends along the third direction Z. Along the third direction Z, the top wall 22 is located above the side wall 21, and the bottom wall 23 is located below the side wall 21.

[0080] The battery cell group 10 is disposed within the accommodating cavity 211. The battery cell group 10 comprises multiple battery cells 11, which can be connected in series, parallel, or a combination thereof (a combination means that multiple battery cells 11 are connected in both series and parallel) to form the battery cell group 10. The battery cell group 10 is disposed within the accommodating cavity 211 of the housing 20. Alternatively, the battery 100 may also comprise multiple battery cell groups 10, which can then be connected in series, parallel, or a combination thereof to form the battery 100. In other words, the accommodating cavity 211 can contain a single battery cell group 10 or multiple battery cell groups 10. Each battery cell 11 can be a secondary battery 100 or a primary battery 100; it can also be a lithium-sulfur battery 100, a sodium-ion battery 100, or a magnesium-ion battery 100, but is not limited to these. The battery cell 11 can be cylindrical, flat, cuboid, or other shapes.

[0081] The end plate 30 is used as a limiting component and fastener for the battery cell group 10, so as to fasten and limit the multiple battery cells 11 of the battery cell group 10, and to restrict the movement of the battery cell group 10 within the housing 20.

[0082] In some embodiments of this application, a plurality of battery cells 11 of the battery cell pack 10 are arranged along the length direction (second direction Y) of the housing 20, and end plates 30 are disposed at both ends of the battery cell pack 10 along the second direction Y and located between the battery cell pack 10 and the side wall 21.

[0083] The end plate 30 can be made of materials such as plastic, nylon, and fiberglass, or conventional metal materials such as aluminum and aluminum alloy. The end plate 30 can be an injection molded part or a die-cast part.

[0084] The exhaust port 212 provides an exhaust channel 34 for the battery 100 housing 20, so that the gas generated by the battery cell 11 inside the housing 20 can be discharged from the housing 20 through the exhaust port 212.

[0085] It is understood that "end plate 30 covering exhaust port 212" means that after the battery 100 is assembled, the end plate 30 is attached to or at least partially attached to the side wall 21 where the exhaust port 212 is provided. The part of the end plate 30 attached to the side wall 21 forms a block between the exhaust port 212 and the accommodating cavity 211, thereby restricting the communication between the accommodating cavity 211 and the exhaust port 212. In some embodiments, the side of the end plate 30 facing the side wall 21 of the housing 20 can be attached to the side wall 21 to ensure the space utilization of the housing 20, thereby improving the energy density of the battery 100.

[0086] A flow channel 35 is provided on the end plate 30. The flow channel 35 connects the accommodating cavity 211 and the exhaust port 212. The accommodating cavity 211, the flow channel 35, and the exhaust port 212 form a gas flow path, which guides the gas generated in the battery 100 to flow in a specific direction and finally discharges through the exhaust port 212.

[0087] It is understandable that the battery 100 can be equipped with one exhaust port 212 and one flow channel 35, or it can be equipped with multiple exhaust ports 212 and multiple flow channels 35, with multiple exhaust ports 212 and multiple flow channels 35 corresponding one to one.

[0088] For example, please refer to Figure 2 The battery 100 contains three battery cell groups 10. Each battery cell group 10 is connected to an end plate 30 between itself and the side wall 21 of the housing 20. Each end plate 30 has a flow channel 35. Correspondingly, the side wall 21 of the housing 20 has three exhaust ports 212, which correspond one-to-one with the flow channels 35 on the three end plates 30.

[0089] The side wall 21 of the housing 20 of the battery 100 is provided with an exhaust port 212, and the end plate 30 is provided with a guide channel 35. The guide channel 35 connects the accommodating cavity 211 of the housing 20 and the exhaust port 212. The guide channel 35 can guide the gas generated inside the battery 100, so that the gas generated inside the battery 100 can quickly and timely reach the exhaust port 212 of the housing 20 along the guide channel 35, and finally be discharged from the housing 20 from the exhaust port 212, ensuring the smooth exhaust of the battery 100 and improving the safety of the battery 100. At the same time, the guide channel 35 and the exhaust port 212 can effectively avoid the risk of gas discharged from the battery cell 11 remaining or flowing inside the housing 20, improving the safety of the battery 100. The flow channel 35 is set on the end plate 30, which can directly cover the exhaust port 212 of the box 20. This structure avoids the flow channel 35 occupying the space inside the box 20 alone, and avoids affecting the structural density inside the battery 100 box 20. It is conducive to ensuring the space utilization rate inside the box 20, thereby ensuring the overall energy density of the battery 100.

[0090] In some embodiments, please refer to Figure 4 The housing 20 includes a top wall 22, side walls 21 surrounding the top wall 22, a battery cell group 10 located below the top wall 22, and an exhaust gap 2111 between the top wall 22 and the battery cell group 10. A flow channel 35 is used to connect the exhaust gap 2111 and the exhaust port 212.

[0091] The exhaust gap 2111 can be implemented in various ways. For example, a preset gap can be provided between the top wall 22 of the housing 20 and the top of the battery cell assembly 10, forming the exhaust gap 2111. Alternatively, a recessed exhaust groove can be provided on the side of the top wall 22 of the housing 20 facing the battery cell assembly 10. After the battery 100 is assembled, the top wall 22 of the housing 20 abuts against the top structure of the battery cell assembly 10, and the exhaust groove forms the exhaust gap 2111. Of course, it is understood that the exhaust gap 2111 can be located within the accommodating cavity 211 and be part of the accommodating cavity 211, or the exhaust gap 2111 can be connected to the accommodating cavity 211.

[0092] An exhaust gap 2111 is provided between the battery cell group 10 and the top wall 22 of the housing 20. The exhaust gap 2111 can further guide the gas discharged from the battery cell 11, so that the gas discharged from the battery cell 11 can be discharged from the battery 100 housing 20 through the exhaust gap 2111, the guide channel 35, and the exhaust port 212, thereby preventing the gas from freely dissipating in the housing 20 and further reducing the risk of safety hazards caused by the gas remaining in the housing 20.

[0093] It is understood that the battery cells 11 of the battery cell pack 10 have gas discharge sections (such as explosion-proof valves). The exhaust section of each battery cell 11 of the battery cell pack 10 is located on the side of the battery cell pack 10 facing the top wall 22. The exhaust gap 2111 is located between the top wall 22 of the housing 20 and the battery cell pack 10, ensuring that the gas discharged through the battery cell 11 can directly enter the exhaust gap 2111. The exhaust gap 2111 guides the gas to flow through the guide channel 35.

[0094] In some embodiments, along the thickness direction of the end plate 30, the flow channel 35 is directly opposite the exhaust port 212 or the projections of the flow channel 35 and the exhaust port 212 at least partially overlap.

[0095] It is understandable that the thickness direction of the end plate 30 extends along the line connecting the side wall 21 and the battery cell group 10. That is, one side of the thickness direction of the end plate 30 faces the battery cell group 10 and directly or indirectly abuts against the battery cell group 10, while the other side of the thickness direction of the end plate 30 faces the side wall 21 of the housing 20.

[0096] Specifically, please refer to Figure 2 The multiple battery cells 11 of the battery cell group 10 are arranged along the length direction (second direction Y) of the housing 20, and the thickness direction of the end plate 30 extends along the second direction Y.

[0097] The flow channel 35 and the exhaust port 212 are directly opposite each other or their projections at least partially overlap, ensuring that there is an air passage surface between the flow channel 35 and the exhaust port 212, so that the airflow passing through the flow channel 35 can quickly and timely enter the exhaust port 212 and be discharged through the exhaust port 212.

[0098] In some embodiments, please continue to refer to Figure 4 and Figure 5 and further refer to Figure 6 and Figure 7 , Figure 6 Axonometric view of the end plate 30 provided in some embodiments of this application from a first perspective. Figure 7 This is an isometric view of the end plate 30 provided in some embodiments of this application from a second perspective. The flow channel 35 includes a vertical channel 351 and a horizontal channel 352. The upper end of the vertical channel 351 is connected to the receiving cavity 211, and one end of the horizontal channel 352 along the thickness direction is connected to the vertical channel 351, and the other end is connected to the exhaust port 212.

[0099] The upper end of the vertical channel 351 is connected to the accommodating cavity 211, so that the gas in the box 20 enters the guide channel 35 from the upper end of the vertical channel 351, and is then guided by the horizontal channel 352 to the exhaust port 212 set on the side wall 21. The vertical channel 351 and the horizontal channel 352 are connected to the exhaust port 212 of the side wall 21 and the accommodating cavity 211.

[0100] Based on the implementation form of "there is an exhaust gap 2111 between the top wall 22 and the battery cell group 10, and the flow channel 35 connects the exhaust gap 2111 and the exhaust port 212", the upper end of the vertical channel 351 is connected to the exhaust gap 2111.

[0101] Specifically, such as Figure 5 As shown, the vertical channel 351 extends along the third direction Z, and the horizontal channel 352 extends along the second direction Y. Along the third direction Z, the upper end of the vertical channel 351 is connected to the exhaust gap 2111.

[0102] The flow channel 35 includes a vertical channel 351 and a horizontal channel 352 that are interconnected. The upper end of the vertical channel 351 is connected to the accommodating cavity 211. The horizontal channel 352 connects the vertical channel 351 and the exhaust port 212. The connection structure between the vertical channel 351 and the horizontal channel 352 enables the direction conversion of the flow channel 35. The exhaust port 212 is located on the side wall 21 of the housing 20. The vertical channel 351 guides the gas into the flow channel 35 and then flows through the horizontal channel 352 to the exhaust port 212 located on the side wall 21 of the housing 20, so that the gas can be smoothly discharged from the battery 100 along the horizontal channel 352 and the exhaust port 212.

[0103] In some embodiments, the vertical channel 351 does not penetrate the end plate 30 in the vertical direction.

[0104] It is understandable that, since the upper end of the vertical channel 351 is connected to the accommodating cavity 211, the "vertical direction" refers to extending from top to bottom along the third direction Z, that is, the vertical channel 351 extends from the upper end of the end plate 30 from top to bottom along the third direction Z but does not penetrate the bottom of the end plate 30.

[0105] The vertical channel 351 does not penetrate the end plate 30. On the one hand, this allows the end plate 30 to block and limit the vertical flow of gas, preventing high-temperature and high-pressure gas from flowing directly downwards along the vertical channel 351 to the bottom wall 23 of the housing 20 and stagnating inside the housing 20. Therefore, the fact that the vertical channel 351 does not penetrate the end plate 30 further ensures the directional guiding effect of the flow channel 35 on the gas. On the other hand, the design that the vertical channel is not completely penetrating in the height direction of the end plate can effectively reduce the diffusion of high-temperature gas and prevent the airflow from directly reaching the bottom of the housing and leaking to the battery cells near the end plate.

[0106] In some embodiments, please continue to refer to Figure 6 and Figure 7 The end plate 30 includes an end plate body 31 and a plurality of first reinforcing ribs 32. The end plate 30 has a first surface 311 facing the battery cell assembly 10 and a second surface 312 facing away from the battery cell assembly 10. The first surface 311 abuts against the battery cell assembly 10. The plurality of first reinforcing ribs 32 are formed on the second surface 312 and abut against the side wall 21. The plurality of first reinforcing ribs 32 are spaced apart in the vertical direction. The plurality of first reinforcing ribs 32 include a top reinforcing rib 321, a middle reinforcing rib 322 and a bottom reinforcing rib 323. A vertical channel 351 passes through at least the top reinforcing rib 321, and a transverse channel 352 is formed between two adjacent first reinforcing ribs 32.

[0107] The function of the first reinforcing rib 32 is to improve the structural strength of the end plate body 31. The first reinforcing rib 32 can be a strip-like structure or a plate-like structure, and can be a planar structure or a curved structure. For example, Figure 6 As shown, the first reinforcing rib 32 has a planar plate-like structure. The first reinforcing rib 32 and the end plate body 31 can be integrally formed, or they can be assembled by welding, screwing, or other methods.

[0108] Understandably, the multiple first reinforcing ribs 32 abut against the side wall 21, that is, the ends of the multiple reinforcing ribs facing the side wall 21 are attached to the side wall 21, and the surface where the ends of the first reinforcing ribs 32 facing the side wall 21 are located covers the exhaust port 212, blocking the communication between the exhaust port 212 on the side wall 21 and the accommodating cavity 211.

[0109] The phrase "vertical channel 351 at least penetrates the top reinforcing rib 321, and transverse channel 352 is formed between two adjacent first reinforcing ribs 32" indicates that the flow channel 35 can have various implementation structures. Specifically, the vertical channel 351 can penetrate only the top reinforcing rib 321, thus forming a transverse channel 352 between the top reinforcing rib 321 and the adjacent middle reinforcing rib 322; the vertical channel 351 can penetrate the top reinforcing rib 321 and some of the sequentially adjacent middle reinforcing ribs 322, thus forming a transverse channel 352 between any two first reinforcing ribs 321 and middle reinforcing ribs 322 connected to the vertical channel 351; or the vertical channel 351 can penetrate the top reinforcing rib 321 and all middle reinforcing ribs 322, thus forming a transverse channel 352 between any two adjacent first reinforcing ribs 321 and bottom reinforcing rib 323.

[0110] The first reinforcing rib 32 effectively enhances the structural strength of the end plate 30 and improves its resistance to deformation. Furthermore, compared to increasing the overall thickness of the end plate 30 to increase its strength, the structure of the first reinforcing rib 32 reduces the overall weight and material loss of the end plate 30 while maintaining its structural strength, thus helping to reduce the weight and material cost of the battery 100. Additionally, by vertically penetrating a portion of the first reinforcing rib 32 along the position of the exhaust port 212 on the side wall 21, a flow channel 35 can be directly formed on the first reinforcing rib 32, making implementation highly convenient.

[0111] In some embodiments, please continue to refer to Figure 6 and Figure 7 The top reinforcing rib 321 is provided with a first opening 3211, and the middle reinforcing rib 322 is provided with a second opening 3221. The first opening 3211 and the second opening 3221 are connected to each other to form a vertical channel 351. The area of ​​the first opening 3211 is larger than the area of ​​the second opening 3221.

[0112] The shapes of the first opening 3211 and the second opening 3221 can be varied, such as rectangular, circular, elliptical, etc. The shapes of the first opening 3211 and the second opening 3221 can be the same or different. In the vertical direction, the projection of the second opening 3221 can fall completely into the projection of the first opening 3211, or the projection of the second opening 3221 can fall partially into the projection of the first opening 3211.

[0113] For example, such as Figure 6 and Figure 7 As shown, both the first opening 3211 and the second opening 3221 are rectangular, and the projection of the second opening 3221 falls completely into the projection of the first opening 3211.

[0114] The top reinforcing rib 321 has a large first opening 3211, which can collect airflow and guide the gas to quickly enter the vertical channel 351.

[0115] In some embodiments, the top reinforcing rib 321 is further provided with a clamping portion 40 for cooperating with the clamping mechanism of the end plate 30.

[0116] The clamping part 40 can be provided in one, two or more ways, and the position of the clamping part 40 on the top reinforcing rib 321 can be flexibly adjusted according to the actual battery 100 assembly process requirements.

[0117] The clamping part 40 can be a similar strip-shaped, column-shaped, block-shaped, hook-shaped, or other structure protruding from the top reinforcing rib 321. For examples, please refer to [link / reference]. Figure 6 and Figure 7 The clamping part 40 is a hole-like structure formed on the top reinforcing rib 321, extending from the top reinforcing rib 321 to the middle reinforcing rib 322.

[0118] The top reinforcing rib 321 is provided with a clamping part 40, which enables the clamping mechanism to act on the clamping part 40 to clamp the end plate 30, facilitating the assembly of the end plate 30.

[0119] In some embodiments, please continue to refer to Figure 6 and Figure 7 The end plate 30 also includes a plurality of second reinforcing ribs 33, which are formed on the second surface 312 and abut against the side wall 21. The plurality of second reinforcing ribs 33 are intersected with the plurality of first reinforcing ribs 32, and each second reinforcing rib 33 extends in the vertical direction.

[0120] Similar to the first reinforcing rib 32, the second reinforcing rib 33 can be a strip-like structure or a plate-like structure; it can be a planar structure or a curved structure, for example, as shown in... Figure 6 and Figure 7 As shown, based on the first reinforcing rib 32 being a planar plate-shaped embodiment, the second reinforcing rib 33 is also a planar plate-shaped structure.

[0121] The end plate 30 includes a second reinforcing rib 33 that is offset from the first reinforcing rib 32. The first reinforcing rib 32 and the second reinforcing rib 33 form a mesh structure, which further improves the structural strength of the end plate 30.

[0122] It is understood that the vertical channel 351 can be located between any two adjacent second reinforcing ribs 33, or it can span one or more second reinforcing ribs 33.

[0123] In some embodiments, please refer to Figure 6 and Figure 7The vertical channel 351 is located between two adjacent second reinforcing ribs 33.

[0124] The vertical channel 351 is set between two adjacent second reinforcing ribs 33. The two adjacent second reinforcing ribs 33 play a role in intercepting and limiting the lateral flow of air, further improving the guiding effect of the guide channel 35 on the airflow.

[0125] In some embodiments, please refer again Figure 2 and Figure 4 The battery 100 may also include a pressure relief mechanism 50, which is disposed on the side wall 21. One end of the pressure relief mechanism 50 is connected to the exhaust port 212. The pressure relief mechanism 50 is configured to release the internal pressure when the internal pressure of the battery 100 reaches a threshold.

[0126] The pressure relief mechanism 50 can adopt various implementation structures. The pressure relief mechanism 50 can be an explosion-proof valve installed on the side wall 21 and connected to the exhaust port 212, a balance valve installed on the side wall 21 and connected to the exhaust port 212, or a structurally weak area set on the side wall 21 of the housing 20. Of course, the structurally weak area can be integrally formed with the side wall 21 of the housing 20, or it can be set separately from the side wall 21 of the housing 20. For example, a separate carrier can be set, and the carrier has a structurally weak area. An installation part for the carrier is reserved on the side wall 21 of the housing 20, and the carrier carrying the weak area can be installed on the installation part of the side wall 21.

[0127] The battery 100 is equipped with a pressure relief mechanism 50 connected to the exhaust port 212. The pressure relief mechanism 50 effectively controls the discharge frequency of the battery 100. When the pressure relief mechanism 50 is in an unbraked state, it can effectively prevent dust, water stains and other impurities from entering the housing 20 through the exhaust port 212.

[0128] In other embodiments, please continue to refer to Figure 6 and Figure 7 The end plate 30 can also be embedded with a power lead-out component 60. The power lead-out component 60 is used to lead out the power of the battery cell pack 10. Embedding the power lead-out component 60 into the end plate 30 structure can effectively save the installation space of the power lead-out component 60 in the battery 100 housing 20, further improve the space utilization of the housing 20, and thus improve the energy density of the battery 100.

[0129] Specifically, the power lead-out component 60 may include a first segment 61, a second segment 62, and a third segment 63 connected in sequence. The second segment 62 is embedded in the end plate 30, and the first segment 61 and the third segment 63 extend from the end plate 30. The first segment 61 is electrically connected to the battery cell assembly 10. The power lead-out component 60 should be conductive, and the material of the power lead-out component 60 can be a metal with good conductivity.

[0130] The "second segment 62 of the power lead-out component 60 embedded in the end plate 30" can be implemented in various ways. For example, the power lead-out component 60 can be integrally formed with the end plate 30, or the power lead-out component 60 can be detachably assembled to the end plate 30. The detachable nature of the end plate 30 and the power lead-out component 60 can also be varied, such as: the end plate 30 can be provided with a slot, into which the power lead-out component 60 snaps into and engages with the end plate 30; the power lead-out component 60 can be bonded to the end plate 30 with adhesive; or the power lead-out component 60 can be fixed to the end plate 30 with fasteners, etc.

[0131] This embodiment does not limit the number of power lead-out components 60. One power lead-out component 60 or multiple power lead-out components 60 can be embedded on an end plate 30.

[0132] The first section 61 and the third section 63 of the power lead-out member 60 extend from the end plate 30 to form free connection ends. The direction of the extension of the first section 61 and the third section 63 from the end plate 30 can be flexibly set according to the overall structure of the battery 100. For example, the extension position of the first section 61 can be close to the power output part of the battery cell group 10.

[0133] In some embodiments, the first segment 61 extends from the top of the end plate 30 to be electrically connected to the battery cell assembly 10, and the third segment 63 extends from the bottom of the end plate 30. In order to draw the electrical energy of the battery cell assembly 10 out of the battery 100, the third segment 63 of the power lead-out member 60 extends from the bottom of the end plate 30 and can pass through the housing 20 to draw the electrical energy of the battery cell assembly 10 out of the battery 100. The first segment 61 and the third segment 63 extend from the top and bottom of the end plate 30, respectively, which can effectively avoid interference with the assembly of the end plate 30 and avoid the power lead-out member 60 occupying space inside the battery 100 housing.

[0134] In one embodiment, the end plate 30 includes an end plate body 31 and a plurality of first reinforcing ribs 32. The end plate body 31 has a first surface 311 facing the battery cell assembly 10 and a second surface 312 facing away from the battery cell assembly 10. The first surface 311 abuts against the battery cell assembly 10. The plurality of first reinforcing ribs 32 are formed on the second surface 312 and abut against the side wall 21. The plurality of first reinforcing ribs 32 are spaced apart in the vertical direction. The second segment 62 can penetrate the plurality of first reinforcing ribs 32 and be integrally injection molded with the plurality of first reinforcing ribs 32 or detachably connected to the plurality of first reinforcing ribs 32.

[0135] For example, please refer to Figure 7The power lead-out component 60 is detachably mounted on the end plate 30. Each first reinforcing rib 32 has a clearance opening 324 for avoiding the power lead-out component 60. The power lead-out component 60 passes through the clearance opening 324 of each first reinforcing rib 32 in sequence to assemble the power lead-out component 60 onto the plurality of first reinforcing ribs 32. Furthermore, two adjacent clearance openings 324 are staggered, so that the power lead-out component 60 bends twice on the plurality of first reinforcing ribs 32.

[0136] Because the power lead-out component 60 is detachably connected to the end plate 30, a gap inevitably exists at the connection point. When high-temperature, high-pressure gas is generated inside the battery 100, this gas may flow along the power lead-out component 60 through the gap between the end plate 30 and the power lead-out component 60, posing a risk of melting the power lead-out component 60 and posing a significant safety hazard. In this embodiment, the power lead-out component 60 is bent twice, causing its extension direction to change at least twice. By changing the extension direction of the power lead-out component 60, the risk of gas flowing along the power lead-out component 60 is effectively reduced.

[0137] Of course, in practical applications, the power lead-out component 60 can be bent two, three, four or even more times.

[0138] In some embodiments, the bending angle 64 of the power lead-out member 60 is 40° to 130°. That is, the power lead-out member 60 is bent to form a bending angle 64, and the bending angle 64 is 40° to 130°. In some embodiments, the bending angle 44 of the power lead-out member 40 is 75° to 100°.

[0139] For example, the bending angle of the bending angle 64 of the power lead-out component 60 is 90°.

[0140] In battery 100, conductive metal is generally used as the power lead 60. If the bending angle 64 is too small, it will easily affect the structural strength of the power lead 60 and there is a risk of breakage. If the bending angle 64 is too large, it will not effectively block the airflow. In this embodiment, the bending angle 64 of the power lead 60 is controlled between 40° and 130°, which is beneficial to ensure the structural strength of the power lead 60 while playing a good role in blocking the gas.

[0141] In some embodiments, the battery 100 may further include an output terminal 90, one end of which is electrically connected to the battery cell group 10 for outputting the electrical energy of the battery cell group 10, and the other end of which is electrically connected to the first segment 61.

[0142] The output terminal 90 can be located on the end plate 30, or it can be located in other structures within the battery 100, for example, such as... Figure 6and Figure 7 As shown, the output pole 90 is located on the top reinforcing rib 321, and the connection between the first section 61 of the power lead-out component 60 and the output pole 90 can be achieved by screwing, welding, or other methods.

[0143] In some embodiments, please refer again Figure 2 and Figure 3 and further refer to Figure 8 and Figure 9 , Figure 8 for Figure 2 A magnified view of part A shown below. Figure 9 for Figure 3 The enlarged view of part B is shown. The enclosure 20 also includes a bottom wall 23, and side walls 21 surround the bottom wall 23. The bottom wall 23 is provided with a through hole 231, and the third section 63 extends from the through hole 231 to lead electrical energy to the outside of the enclosure 20.

[0144] In some embodiments, please refer again Figure 2 and Figure 3 The battery 100 may also include a high-voltage distribution box 80, which is located outside the housing 20, with the third section 63 extending out of the housing 20 to connect with the high-voltage distribution box 80.

[0145] It is understood that the high-voltage distribution box 80 can be fixed to the outer wall of the enclosure 20 by means of screwing, riveting, welding, etc. In some embodiments, the high-voltage distribution box 80 can be sealed to the bottom wall 23 of the enclosure 20, and the inner cavity of the high-voltage distribution box 80 is connected to the through hole 231 on the bottom wall 23 of the enclosure 20. The power lead-out component 60 extends out of the enclosure 20 through the through hole 231 and directly enters the inner cavity of the high-voltage distribution box 80, thereby ensuring the sealing of the enclosure 20.

[0146] The third section 63 of the power lead-out component 60 extends out of the housing 20 and connects to the high-voltage distribution box 80. During the charging and discharging process of the battery 100, the high-voltage distribution box 80 plays a role in protecting the power battery 100 system and power transmission and distribution.

[0147] In some other embodiments, please refer to Figure 10 and Figure 11 , Figure 10 This is a schematic diagram showing the state of the sampling unit 70 penetrating the end plate 30 according to some embodiments of this application. Figure 11 for Figure 10 The diagram shows the mating structure of the sampling unit 70 penetrating the end plate 30. The battery 100 may also include a sampling unit 70, which is used to collect signals from the battery cell pack 10. The sampling unit 70 penetrates the end plate 30, and one end of the sampling unit 70 is connected to the battery cell pack 10.

[0148] The sampling unit 70 is used to collect signals from the battery cell group 10, including but not limited to the collection of voltage signals, temperature signals and other signals from the battery cell group 10. The sampling unit 70 can be connected to the control system of the battery 100, so that the control system of the battery 100 can collect and monitor information such as voltage and temperature of the battery 100.

[0149] Similarly, there are various ways to implement the sampling unit 70 through the end plate 30. The sampling unit 70 and the end plate 30 can be movably coupled or fixed in relative position. Specifically, the sampling unit 70 can be integrally formed with the end plate 30, or it can be separately set from the end plate 30 and fixed to the end plate 30 by means of snap-fit, screw-fit, adhesive, etc., or a channel 34 is provided in the end plate 30 for the sampling unit 70 to pass through, so that the sampling unit 70 passes through the end plate 30 through the channel 34.

[0150] For example, the end plate 30 is provided with a channel 34 through which the sampling unit 70 passes. The channel 34 extends through the end plate 30 from the top to the bottom. One end of the sampling unit 70 extends from the top of the end plate 30 to connect with the battery cell assembly 10, and the other end of the sampling unit 70 extends from the bottom of the end plate 30 and passes through the housing 20 to lead the signal to the outside of the housing 20.

[0151] Based on the embodiment where "end plate 30 includes end plate body 31 and multiple first reinforcing ribs 32", channel 34 can pass through multiple first reinforcing ribs 32, so that one end of sampling unit 70 extends from top reinforcing rib 321 to connect with battery cell group 10, and the other end of sampling unit 70 extends from bottom reinforcing rib 323 and passes through housing 20 to lead the signal to the outside of housing 20. After the other end of sampling unit 70 passes through housing 20, it can be directly connected to the control system of the power device, or it can be connected to a separate control system set for battery 100.

[0152] In some embodiments, based on the implementation form that "the battery 100 includes a high-voltage distribution box 80, the high-voltage distribution box 80 is disposed outside the housing 20, and the third segment 63 extends out of the housing 20 to connect with the high-voltage distribution box 80", the control system of the battery 100 can be integrated into the housing of the high-voltage distribution box 80. That is, the third segment 63 of the power lead-out component 60 and one end of the sampling unit 70 extend into the housing of the high-voltage distribution box 80 after passing through the housing 20.

[0153] In some embodiments, such as Figure 10 As shown, the sampling unit 70 may include a sampling unit body 71 and a blocking part 72. The blocking part 72 is formed on the outer peripheral surface of the sampling unit body 71 and protrudes from the outer peripheral surface of the sampling unit body 71. The blocking part 72 is used to cover the gap between the sampling unit body 71 and the inner wall of the channel 34.

[0154] For example, such as Figure 11 As shown, based on the embodiment in which "the housing 20 includes a top wall 22, and there is an exhaust gap 2111 between the top wall 22 and the battery cell assembly 10, and the flow channel 35 connects the exhaust gap 2111 and the exhaust port 212", one end of the sampling unit 70 extends from the top reinforcing rib 321 to connect with the battery cell assembly 10. The shielding part 72 is located above the top reinforcing rib 321. After the sampling unit 70 passes through multiple first reinforcing ribs 32, the shielding part 72 covers the gap between the sampling unit body 71 and the top reinforcing rib 321, which facilitates blocking gas from the upstream of the gas flow.

[0155] When high-temperature and high-pressure gas is generated inside the battery 100, the shielding part 72 can effectively prevent the gas from flowing along the gap between the sampling unit 70 and the end plate 30, thereby reducing the risk of high-temperature and high-pressure gas damaging the sampling unit 70, and preventing high-temperature and high-pressure gas from flowing through the gap between the sampling unit 70 and the end plate 30 in the housing 20, affecting the normal directional discharge of gas inside the battery 100.

[0156] It is understandable that the relative positions of the power lead-out component 60, the current guiding channel 35, and the sampling unit 70 on the end plate 30 can be flexibly set according to the different connection positions of the actual battery 100.

[0157] For example, please refer to Figure 12 , Figure 12 The diagram below shows the structure of the end plate 30 provided in some embodiments of this application. A flow channel 35 is provided on the same end plate 30, which passes through two sampling units 70 and has a power lead-out component 60 embedded therein. The two sampling units 70 are spaced apart on the end plate 30, the flow channel 35 is located between the two sampling units 70, and the power lead-out component 60 is located on one side of the two sampling units 70.

[0158] According to some embodiments of this application, please refer to Figures 2 to 7This application provides a battery 100, which includes a housing 20, a battery cell assembly 10, and an end plate 30. The housing 20 includes a top wall 22 and a side wall 21 for enclosing and forming a receiving cavity 211. The side wall 21 surrounds the top wall 22 and has an exhaust port 212. The battery cell assembly 10 is disposed within the receiving cavity 211 and includes multiple battery cells 11. The multiple battery cells 11 are stacked and arranged, and an exhaust gap 2111 is formed between the battery cell assembly 10 and the top wall 22. The end plate 30 is disposed within the accommodating cavity 211 and located between the battery cell assembly 10 and the side wall 21. The end plate 30 includes an end plate body 31, a plurality of first reinforcing ribs 32 and a plurality of second reinforcing ribs 33. The end plate body 31 has a first surface 311 facing the battery cell assembly 10 and a second surface 312 facing away from the battery cell assembly 10. The first surface 311 abuts against the battery cell assembly 10. The plurality of first reinforcing ribs 32 and the plurality of second reinforcing ribs 33 are formed on the second surface 312. The plurality of first reinforcing ribs 32 are spaced apart in the vertical direction. The plurality of second reinforcing ribs 33 are intersected with the plurality of first reinforcing ribs 32. Each second reinforcing rib 33 extends in the vertical direction. The plurality of first reinforcing ribs 32 and the plurality of second reinforcing ribs 33 abut against the side wall 21.

[0159] The first reinforcing ribs 32 include a top reinforcing rib 321, a middle reinforcing rib 322, and a bottom reinforcing rib 323. The end plate 30 is provided with a flow guiding channel 35, which includes a vertical channel 351 and a horizontal channel 352. The vertical channel 351 passes through the top reinforcing rib 321 and the middle reinforcing rib 322 in a vertical direction. A horizontal channel 352 is formed between any two first reinforcing ribs 32 between the top reinforcing rib 321 and the bottom reinforcing rib 323. The upper end of the vertical channel 351 is connected to the exhaust gap 2111, and the horizontal channel 352 connects the vertical channel 351 and the exhaust port 212.

[0160] According to some embodiments of this application, this application also provides an electrical device including a battery 100 of any of the above schemes, the battery 100 being used to provide electrical energy to the electrical device.

[0161] The electrical device can be any of the aforementioned devices or systems that use battery 100.

[0162] This application also provides a method for manufacturing a battery 100, please refer to... Figure 13 , Figure 13 This is a schematic flowchart of a method for manufacturing a battery 100 provided in some embodiments of this application. The manufacturing method includes:

[0163] S100: Provide a housing 20, the housing 20 including a sidewall 21 for enclosing and forming a receiving cavity 211, the sidewall 21 having an exhaust port 212;

[0164] S200: Provides a battery cell pack 10, which includes a plurality of battery cells 11, which are stacked in layers.

[0165] S300: Provides an end plate 30, which is provided with a flow guiding channel 35;

[0166] S400: The battery cell pack 10 and the end plate 30 are placed in the accommodating cavity 211, so that the end plate 30 is located between the battery cell pack 10 and the side wall 21 and covers the exhaust port 212. The flow channel 35 connects the accommodating cavity 211 and the exhaust port 212.

[0167] It should be noted that the relevant structure of the battery 100 manufactured by the manufacturing method provided in the above embodiments can be found in the battery 100 provided in the foregoing embodiments, and will not be repeated here.

[0168] The application also provides a manufacturing apparatus 2000 for a battery 100, please refer to... Figure 14 , Figure 14 This is a schematic block diagram of a battery 100 manufacturing apparatus 2000 provided in some embodiments of this application. The manufacturing apparatus 2000 includes a supply module and an assembly module. The assembly module may include a first supply device 2100, a second supply device 2200, and a third supply device 2300. The assembly module may include a first assembly device 2400 and a second assembly device 2500.

[0169] A first providing device 2100 provides a housing 20, which includes a sidewall 21 for enclosing and forming a receiving cavity 211, and the sidewall 21 has an exhaust port 212. A second providing device 2200 provides a battery cell pack 10, which includes a plurality of battery cells 11 arranged in a stacked manner. A third providing device 2300 provides an end plate 30, which is provided with a flow channel 35. A first assembly device 2400 is used to place the battery cell pack 10 in the receiving cavity 211, and a second assembly device 2500 is used to place the end plate 30 in the receiving cavity 211 and between the battery cell pack 10 and the sidewall 21, and to cover the exhaust port 212 with the end plate 30. The flow channel 35 connects the receiving cavity 211 and the exhaust port 212.

[0170] It should be noted that the relevant structure of the battery 100 manufactured by the manufacturing equipment 2000 provided in the above embodiments can be found in the battery 100 provided in the foregoing embodiments, and will not be repeated here.

[0171] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0172] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. 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, characterized by, include: The housing includes sidewalls for enclosing and forming a receiving cavity, the sidewalls having vents; A battery cell assembly, disposed within the accommodating cavity and comprising multiple battery cells, wherein the multiple battery cells are stacked in a layered arrangement; and An end plate is disposed within the accommodating cavity and located between the battery cell assembly and the side wall. The end plate is in contact with the portion of the side wall provided with the exhaust port. The end plate covers the exhaust port. The end plate is provided with a flow guiding channel for connecting the accommodating cavity and the exhaust port. The housing also includes a top wall, and the side walls surround the top wall. The battery cell assembly is located below the top wall, and there is an exhaust gap between the top wall and the battery cell assembly. The flow channel is used to connect the exhaust gap and the exhaust port. The flow channel includes a vertical channel and a horizontal channel. The upper end of the vertical channel is connected to the accommodating cavity, and one end of the horizontal channel along the thickness direction of the end plate is connected to the vertical channel, and the other end is connected to the exhaust port.

2. The battery of claim 1, wherein, Along the thickness direction of the end plate, the flow channel is directly opposite the exhaust port or the projection of the flow channel and the exhaust port at least partially overlaps.

3. The battery of claim 1, wherein, In the vertical direction, the vertical channel does not penetrate the end plate.

4. The battery of claim 3, wherein, The end plate includes: The end plate body has a first side facing the battery cell group and a second side facing away from the battery cell group, the first side abutting against the battery cell group; Multiple first reinforcing ribs are formed on the second surface and abut against the sidewall, and the multiple first reinforcing ribs are spaced apart along the vertical direction; The plurality of first reinforcing ribs include a top reinforcing rib, a middle reinforcing rib, and a bottom reinforcing rib. The vertical channel penetrates at least the top reinforcing rib, and the horizontal channel is formed between two adjacent first reinforcing ribs.

5. The battery of claim 4, wherein, The top reinforcing rib has a first opening, and the middle reinforcing rib has a second opening. The first opening and the second opening are interconnected to form the vertical channel, and the area of ​​the first opening is larger than the area of ​​the second opening.

6. The battery of claim 4, wherein, The top reinforcing rib is also provided with a clamping part for cooperating with the end plate clamping mechanism.

7. The battery according to claim 4, characterized in that, The end plate also includes: Multiple second reinforcing ribs are formed on the second surface and abut against the sidewall. The multiple second reinforcing ribs are arranged intersecting with the multiple first reinforcing ribs, and each second reinforcing rib extends along the vertical direction.

8. The battery according to claim 7, characterized in that, The vertical channel is located between two adjacent second reinforcing ribs.

9. The battery according to any one of claims 1 to 8, characterized in that, The battery also includes: A pressure relief mechanism is disposed on the side wall, one end of the pressure relief mechanism is connected to the exhaust port, and the pressure relief mechanism is configured to release the internal pressure when the internal pressure of the battery reaches a threshold.

10. An electrical appliance, characterized in that, The battery includes the battery according to any one of claims 1 to 9, the battery being used to provide electrical energy.

11. A method for manufacturing a battery, characterized in that, include: A housing is provided, the housing including sidewalls for enclosing and forming a receiving cavity, the sidewalls having vents; A battery cell assembly is provided, the battery cell assembly comprising a plurality of battery cells arranged in a stacked manner; An end plate is provided, the end plate is provided with a flow guiding channel, and the end plate is abutted against the part of the side wall where the exhaust port is provided; The battery cell assembly and the end plate are disposed within the accommodating cavity, such that the end plate is located between the battery cell assembly and the side wall and covers the exhaust port, and the flow channel connects the accommodating cavity and the exhaust port; The housing also includes a top wall, with side walls surrounding the top wall. The battery cell assembly is located below the top wall, and there is an exhaust gap between the top wall and the battery cell assembly. A flow channel connects the exhaust gap and the exhaust port. The flow channel includes a vertical channel and a horizontal channel. The upper end of the vertical channel is connected to the accommodating cavity, and one end of the horizontal channel along the thickness direction of the end plate is connected to the vertical channel, while the other end is connected to the exhaust port.

12. A battery manufacturing apparatus, characterized in that, include: A module is provided for providing a housing, a battery cell assembly, and an end plate. The housing includes a side wall for enclosing and forming a receiving cavity, and the side wall has an exhaust port. The battery cell assembly includes multiple battery cells stacked in layers. The end plate is provided with a flow channel, and the end plate is abutted against the portion of the side wall with the exhaust port. The housing also includes a top wall, and the side wall surrounds the top wall. The battery cell assembly is located below the top wall, and there is an exhaust gap between the top wall and the battery cell assembly. The flow channel is used to connect the exhaust gap and the exhaust port. The flow channel includes a vertical channel and a horizontal channel. The upper end of the vertical channel communicates with the receiving cavity, and one end of the horizontal channel along the thickness direction of the end plate communicates with the vertical channel, and the other end communicates with the exhaust port. An assembly module is used to place the battery cell assembly and the end plate in the accommodating cavity, such that the end plate is located between the battery cell assembly and the side wall and covers the exhaust port, and the flow channel connects the accommodating cavity and the exhaust port.

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