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

Abstract

The application provides a battery, a power consumption device, a method for preparing a battery and a device. The battery comprises: a plurality of battery monomers arranged along a first direction and electrically connected to each other, at least one of the battery monomers of two adjacent battery monomers has a pressure relief mechanism, the pressure relief mechanism is arranged at one end of the battery monomer along the first direction; a sampling member connected to the battery monomer for signal acquisition of the battery monomer; and a protection member located between the two adjacent battery monomers and arranged opposite to the pressure relief mechanism, the protection member and the pressure relief mechanism have an exhaust space therebetween, and the protection member is fixed to the sampling member. The technical scheme of the application can enhance the safety of the battery.

Description

Technical Field

[0001] This application relates to the field of energy storage devices, and more specifically, to a battery, an electrical device, a method for preparing a battery, and an apparatus for preparing a battery. Background Technology

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

[0003] With the continuous development of battery technology, higher requirements are being placed on battery performance, and it is hoped that batteries can take into account multiple design factors at the same time. Summary of the Invention

[0004] This application provides a battery, an electrical device, a method for manufacturing a battery, and an apparatus for manufacturing a battery, to improve battery safety.

[0005] In a first aspect, a battery is provided, comprising: a plurality of battery cells arranged along a first direction and electrically connected to each other, at least one of two adjacent battery cells having a pressure relief mechanism disposed at one end of the battery cell along the first direction; a sampling member connected to the battery cells for acquiring signals from the battery cells; and a protective member located between the two adjacent battery cells and disposed opposite to the pressure relief mechanism, wherein the protective member has an exhaust space between it and the pressure relief mechanism, and the protective member is fixed to the sampling member.

[0006] The technical solution of this application embodiment involves using a sampling device to acquire signals from a plurality of battery cells arranged and electrically connected in a first direction, and forming a pressure relief mechanism at one end of at least one battery cell. Therefore, the pressure relief mechanism is located between two adjacent battery cells.

[0007] Typically, when the pressure relief mechanism is opened, the temperature of the ejected gas can reach over 1000 degrees Celsius. When the pressure relief mechanism is located between two adjacent battery cells, the heat generated by the thermally runaway battery cell can be further conducted to the other battery cell positioned opposite it, causing severe thermal runaway. When the sampling device is also located between two battery cells, it is also prone to damage.

[0008] The technical solution of this application, by fixing a protective component to the sampling component, positions the protective component between two adjacent battery cells and opposite to the pressure relief mechanism, enabling heat insulation and fire prevention in the event of thermal runaway, preventing the heat generated by the thermally runaway battery cell from being further conducted to the other battery cell opposite it. Furthermore, by forming an exhaust space between the protective component and the pressure relief mechanism, venting can be easily carried out, thus preventing the aforementioned problem of thermal runaway propagation.

[0009] In some embodiments, the surface of the protective member opposite to the pressure relief mechanism is a plane.

[0010] In some embodiments, the surface of the protective member opposite to the pressure relief mechanism is curved.

[0011] Here, the surface of the protective component that is opposite to the pressure relief mechanism refers to the surface of the protective component that faces the pressure relief mechanism directly.

[0012] In some embodiments, the protective member includes a base portion and a protrusion. The base portion is disposed opposite to the pressure relief mechanism, and the protrusion is located at one end of the base portion along a second direction and extends from the base portion toward the pressure relief mechanism. The second direction is perpendicular to the first direction. That is, the base portion of the protective member is disposed opposite to the pressure relief mechanism to prevent excrement ejected from the pressure relief mechanism from being sprayed toward the opposing battery cell. The excrement from the pressure relief mechanism includes high-temperature gas, liquid, solid impurities, or flames. Furthermore, by forming a protrusion at one end of the base portion along the second direction, it is possible to prevent excrement from being directly sprayed toward other adjacent battery cells, thereby reducing adverse effects on other battery cells adjacent at one end in the second direction.

[0013] In some embodiments, the protective member has the protrusions at both ends of the base portion along the second direction. This more effectively prevents excrement from being directly sprayed onto other adjacent battery cells, thereby reducing adverse effects on other battery cells adjacent at both ends in the second direction.

[0014] In some embodiments, the surface of the protrusion adjacent to the base portion is curved, and the curved surface is formed in a way that it is recessed into the base portion. That is, the protrusion and the base portion are connected by a curved surface, thereby enabling smooth guidance of the excrement ejected from the pressure relief mechanism.

[0015] In some embodiments, the surface of the protrusion adjacent to the base portion is provided with a plurality of protruding guide strips, which are arranged along a third direction perpendicular to the first and second directions. Because guide strips for guiding flow are formed, and multiple guide strips are arranged in the third direction, these guide strips can be used to better guide excrement to both sides of the pressure relief mechanism in the second direction.

[0016] In some embodiments, a plurality of protrusions are formed between two adjacent guide strips. Such protrusions can more effectively reduce the flow rate of excrement.

[0017] In some embodiments, the protrusion protrudes from the surface of the protective member at a lesser height than the guide strip protrudes from the surface of the protective member. Therefore, the protrusion does not affect the guide strip's ability to direct waste flow.

[0018] In some embodiments, the area of ​​the portion of the protective member disposed opposite to the pressure relief mechanism is 0.35 to 1.5 times the area of ​​the pressure relief mechanism. By ensuring that the area of ​​the portion of the protective member disposed opposite to the pressure relief mechanism in the first direction is within this range, it is possible to effectively block the discharge ejected from the pressure relief mechanism, effectively guide the venting of the pressure relief mechanism, and prevent thermal runaway of adjacent battery cells.

[0019] In some embodiments, a mounting plate is further provided, with its two ends along the first direction respectively connected to two adjacent battery cells, the mounting plate being used to fix the sampling element. This allows the sampling element to be fixed with a simple structure.

[0020] In some embodiments, a plurality of vent holes are formed in the mounting plate, and a guide is provided in the region of the mounting plate adjacent to the vent holes for guiding the waste discharged from the pressure relief mechanism to the vent holes. Thus, the guide can guide the waste discharged from the pressure relief mechanism towards the vent holes, thereby further preventing thermal runaway from occurring in adjacent battery cells.

[0021] In some embodiments, the guide is integral with the mounting plate, and the guide has an inclined surface that slopes from the protective member toward the vent. That is, the guide is part of the mounting plate, and the mounting plate forms an inclined surface that slopes from the protective member toward the vent to guide excrement discharged from the pressure relief mechanism toward the vent of the mounting plate.

[0022] In some embodiments, each of the battery cells includes a can and two electrode terminals of opposite polarity, the two electrode terminals being disposed at opposite ends of the can along the first direction, and at least one of the electrode terminals protruding from the can in a direction away from the interior of the battery cell.

[0023] In some embodiments, a gap is formed between two adjacent battery cells in the first direction, and the connecting portion of the sampling element is located in the gap. The connecting portion is used to connect the electrode terminals of the battery cells, and the protective member is fixed to the connecting portion. Thus, the sampling element can be configured using the gap between adjacent battery cells, reducing the space occupied by the sampling element, making the structure more compact, and improving the energy density of the battery.

[0024] In some embodiments, the connecting portion is attached to the circumferential sidewall of the electrode terminal. By acquiring signals from the circumferential sidewall of the electrode terminal protruding from the can body, rather than from the end face of the electrode terminal, the space occupied by the sampling element can be further reduced, making the structure more compact and improving the energy density of the battery.

[0025] In some embodiments, the connector is elastic and configured to deform in response to external forces to conform to the circumferential sidewall of the electrode terminal, thereby achieving surface contact with the electrode terminal. Because the connector is elastic and can deform elastically under external forces to achieve surface contact with the electrode terminal, it can adaptively and tightly fit with the electrode terminal, achieving a stable electrical connection between the sampling element and the electrode terminal with a simple structure.

[0026] In some embodiments, the electrode terminal protruding from the tank is cylindrical, and the angle of the connection portion wrapping around the electrode terminal is greater than 0 degrees and less than 180 degrees.

[0027] In some embodiments, the connecting portion snaps onto the circumferential sidewall of the electrode terminal. That is, the connecting portion is electrically connected to the circumferential sidewall of the electrode terminal by means of a snap-fit ​​connection, thereby achieving a stable electrical connection.

[0028] In some embodiments, the connecting portion is fully fitted against the sidewall of the electrode terminal. When an electrical connection is achieved through elastic deformation or snap-fit, by ensuring that the connecting portion is fully fitted against the circumferential sidewall of the electrode terminal, the contact area between the two can be increased, resulting in a more stable and reliable electrical connection.

[0029] In some embodiments, the enclosure size of the connecting portion around the electrode terminal is greater than or equal to half the circumference of the sidewall of the electrode terminal and less than the circumference of the sidewall of the electrode terminal. Because the connecting portion forms an opening for engaging the circumferential sidewall of the electrode terminal and extensively encloses the electrode terminal, structural stability can be improved.

[0030] In some embodiments, the electrode terminal protruding from the tank is cylindrical, and the angle of the connection portion around the electrode terminal is greater than or equal to 180 degrees and less than 360 degrees. Because the electrode terminal is cylindrical, the sampling element can be more easily mounted onto it.

[0031] In some embodiments, the inner surface of the connecting portion is provided with a plurality of protrusions for engaging the circumferential sidewall of the electrode terminal. In some embodiments, the circumferential sidewall of the electrode terminal is formed with a plurality of recesses corresponding to the protrusions, the protrusions engaging with the recesses. This prevents the connecting portion from moving or rotating relative to the electrode terminal, thereby improving structural stability.

[0032] In some embodiments, both electrode terminals of each battery cell protrude from the can housing away from the interior of the battery cell, and in two adjacent battery cells, the electrode terminals of one battery cell are positioned opposite and abut against the electrode terminals of the other battery cell. Since the electrode terminals of two adjacent battery cells directly abut against each other to achieve electrical connection, the number of electrical connection components can be reduced, thereby increasing the energy density of the battery.

[0033] In some embodiments, in two adjacent battery cells, the electrode terminals of one battery cell are welded together with the electrode terminals of the other battery cell. By directly welding the two protruding electrode terminals in this manner, a stable electrical connection between two adjacent battery cells can be achieved.

[0034] In some embodiments, in two adjacent battery cells, the electrode terminals of one battery cell are welded together with the electrode terminals of the other battery cell, and the contact area between the sampling element and the electrode terminal is offset from the welding area of ​​the electrode terminal along the first direction. When two electrode terminals are welded, uneven welding areas are often formed on the two electrode terminals. By offsetting the contact area between the sampling element and the electrode terminal from the welding area of ​​the electrode terminal in the first direction, it is possible to avoid poor contact and reduced sampling accuracy caused by the sampling element connecting to the welding area, and also to improve assembly accuracy.

[0035] Secondly, an electrical device is provided, comprising: a battery as described in the first aspect. The battery is used to provide electrical energy.

[0036] Thirdly, a method for manufacturing a battery is provided, comprising: providing a plurality of battery cells arranged along a first direction and electrically connected to each other, wherein at least one of two adjacent battery cells has a pressure relief mechanism disposed at one end of the battery cell along the first direction; providing a sampling member connected to the battery cells for acquiring signals from the battery cells; and providing a protective member located between the two adjacent battery cells and disposed opposite to the pressure relief mechanism, wherein an exhaust space is provided between the protective member and the pressure relief mechanism, wherein the protective member is fixed to the sampling member.

[0037] Fourthly, an apparatus for manufacturing a battery is provided, comprising: a first providing module for providing a plurality of battery cells arranged along a first direction and electrically connected to each other, wherein at least one of two adjacent battery cells has a pressure relief mechanism disposed at one end of the battery cell along the first direction; a second providing module for providing a sampling member to which a protective member is fixed; an installation module for connecting the sampling member to the battery cells, the sampling member being used to acquire signals from the battery cells; and for positioning the protective member between the two adjacent battery cells and opposite to the pressure relief mechanism, wherein an exhaust space is provided between the protective member and the pressure relief mechanism. Attached Figure Description

[0038] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0039] Figure 1 This is a schematic diagram of a vehicle according to one embodiment of this application;

[0040] Figure 2 This is a schematic diagram of the structure of a battery according to one embodiment of this application;

[0041] Figure 3 This is a schematic diagram of a matrix arrangement of multiple battery cells according to an embodiment of this application;

[0042] Figure 4 This is a schematic diagram of the structure of multiple battery cells according to one embodiment of this application;

[0043] Figure 5 This is an enlarged structural schematic diagram of the electrical connection portion between two battery cells according to an embodiment of this application;

[0044] Figure 6 This is a schematic diagram of a sampler with a protective member formed according to an embodiment of this application;

[0045] Figure 7 This is a schematic diagram of the structure of a protective component according to an embodiment of this application;

[0046] Figure 8 This is a schematic diagram of a protective member having a guide strip formed according to an embodiment of this application;

[0047] Figure 9 The structure of the protective member according to another embodiment of this application;

[0048] Figure 10This is a schematic diagram of the structure of a vent and a guide element according to an embodiment of this application;

[0049] Figure 11 This is a schematic diagram of the assembly structure of the sampling component and the mounting plate according to one embodiment of this application, wherein, Figure 11 (a) is a three-dimensional structural diagram showing the separation of the sampling component from the mounting plate. Figure 11 (b) is a side view of the structure where the sampling component and mounting plate are installed between two adjacent battery cells. Figure 11 (c) is a three-dimensional structural diagram of the sampler and the mounting plate combined together;

[0050] Figure 12 This is a schematic diagram of the assembly structure of the sampling component and the mounting plate according to another embodiment of this application, wherein, Figure 12 (a) is a three-dimensional structural diagram showing the separation of the sampling component from the mounting plate. Figure 12 (b) is a side view of the structure where the sampling component and mounting plate are installed between two adjacent battery cells. Figure 12 (c) is a three-dimensional structural diagram of the sampler and the mounting plate combined together;

[0051] Figure 13 This is a schematic diagram of the structure of a sampling component according to another embodiment of this application, wherein, Figure 13 (a) indicates that the sampling element is not in contact with the electrode terminals. Figure 13 (b) indicates the state of contact between the sampling element and the electrode terminal;

[0052] Figure 14 This is a schematic flowchart illustrating a method for preparing a battery according to one embodiment of this application;

[0053] Figure 15 This is a schematic block diagram of an apparatus for preparing a battery according to one embodiment of this application. Detailed Implementation

[0054] 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 described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0055] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application 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 description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0056] In this application, the reference to "embodiment" means that a specific 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 mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0057] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0058] 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, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0059] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0060] The battery mentioned in the embodiments of this application refers to a single physical module comprising multiple 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, etc.

[0061] A battery cell includes electrode components and an electrolyte. The electrode components include 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 electrode components. 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. The uncoated current collector protrudes from the coated current collector and serves 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. The uncoated current collector protrudes from the coated current collector and serves as the negative electrode tab. The negative current collector can be made of copper, and the negative active material can be carbon or silicon, etc. To ensure that a large current can be carried without melting, multiple positive electrode tabs are stacked together, and multiple negative electrode tabs are stacked together. The diaphragm can be made of PP or PE, etc. Furthermore, the electrode assembly can be a wound structure or a stacked structure; the embodiments of this application are not limited to these.

[0062] The development of battery technology must take into account multiple design factors, such as energy density, cycle life, discharge capacity, charge / discharge rate and other performance parameters. In addition, battery safety also needs to be considered.

[0063] Currently, electric vehicle batteries often require dozens or even thousands of individual battery cells.

[0064] In practical applications, due to slight differences in certain parameters between individual battery cells (such as voltage, internal resistance, and SOC (state of charge), these differences will increase over time. If these differences are ignored, the consistency of the battery cells will deteriorate, affecting battery performance and potentially causing serious consequences, including fires and explosions. Therefore, sampling devices are installed within the battery to detect and address any anomalies.

[0065] In existing technologies, when the pressure relief mechanism at the end of a battery cell is opened, the temperature of the ejected gas can reach over 1000 degrees Celsius. When the pressure relief mechanism is located between two adjacent battery cells, the heat generated by the thermally runaway battery cell can be further conducted to the other battery cell positioned opposite it, causing severe thermal runaway. When the sampling device is also located between two battery cells, it is also prone to damage.

[0066] In view of this, this application provides a technical solution: a battery comprising: a plurality of battery cells arranged along a first direction and electrically connected to each other, at least one of two adjacent battery cells having a pressure relief mechanism disposed at one end of the battery cell along the first direction; a sampling member connected to the battery cells for acquiring signals from the battery cells; and a protective member located between the two adjacent battery cells and disposed opposite to the pressure relief mechanism, wherein the protective member has an exhaust space between it and the pressure relief mechanism, and the protective member is fixed to the sampling member.

[0067] Therefore, the protective components installed on the sampling unit can be used to provide thermal insulation and fire protection in the event of thermal runaway, preventing the heat generated by the thermal runaway battery cell from being further conducted to another battery cell located opposite it. Furthermore, the exhaust space formed between the protective components and the pressure relief mechanism can be used to easily guide and exhaust gas, thus preventing the aforementioned problem of thermal runaway propagation.

[0068] One embodiment of this application provides an electrical device in which a battery is used to provide electrical energy.

[0069] The technical solutions described in the embodiments of this application are applicable to various battery-powered devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, electric vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0070] It should be understood that the technical solutions described in the embodiments of this application are not limited to the devices described above, but can also be applied to all devices that use batteries. However, for the sake of brevity, the following embodiments are all illustrated using electric vehicles as examples.

[0071] For example, such as Figure 1 The diagram shown is a structural schematic of a vehicle 100 according to one embodiment of this application. The vehicle 100 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 100 can have a motor 2, a controller 3, and a battery 1 installed inside. The controller 3 controls the battery 1 to supply power to the motor 2. For example, the battery 1 can be installed at the bottom, front, or rear of the vehicle 100. The battery 1 can be used to power the vehicle 100; for example, the battery 1 can serve as the operating power source for the vehicle 100's electrical system, such as meeting the power requirements for starting, navigation, and operation of the vehicle 100. In another embodiment of this application, the battery 1 can not only serve as the operating power source for the vehicle 100 but also as the driving power source for the vehicle 100, replacing or partially replacing gasoline or natural gas to provide driving power to the vehicle 100.

[0072] To meet different power needs, battery 1 may include multiple battery cells 20, wherein the multiple battery cells 20 may be connected in series, in parallel or in a mixed manner, and a mixed manner refers to a combination of series and parallel connections.

[0073] For example, such as Figure 2 The diagram shown is a structural schematic of a battery 1 according to an embodiment of this application. The battery 1 may include multiple battery cells 10, each battery cell 10 including multiple battery individuals 20 arranged along a first direction X and electrically connected to each other. The multiple battery cells 10 are arranged along a second direction Y. The second direction Y is perpendicular to the first direction X. That is, the multiple battery individuals 20 in the battery 1 are arranged in a matrix structure. Optionally, the battery 1 may also have only one battery cell 10, which includes multiple battery individuals 20 arranged along the first direction X and electrically connected. The battery 1 may also include a housing 11, the housing 11 having a hollow interior structure, and the multiple battery individuals 20 are housed within the housing 11. Figure 2 As shown, the housing 11 may include two parts, referred to here as the top cover 111 and the housing shell 112. The top cover 111 and the housing shell 112 are fastened together. The shapes of the top cover 111 and the housing shell 112 can be determined according to the shape of the combination of multiple battery cells 20. For example, both the top cover 111 and the housing shell 112 can be hollow cuboids with only one open side each. The openings of the top cover 111 and the housing shell 112 are opposite to each other, and the top cover 111 and the housing shell 112 are fastened together to form a housing with a closed chamber. Alternatively, the top cover 111 can be a cuboid with an opening and the housing shell 112 can be plate-shaped, or the housing shell 112 can be a cuboid with an opening and the top cover 111 can be plate-shaped. The top cover 111 and the housing shell 112 are opposite to each other and fastened together to form a housing with a closed chamber. Multiple battery cells 20 are connected in parallel, series, or mixed and then placed inside the housing formed by the upper cover 111 and the casing 112.

[0074] like Figure 3 As shown, multiple battery cells 20 are arranged along a first direction X and electrically connected to each other to form a battery cell 10. Specifically, the battery cell 10 is formed by connecting multiple battery cells 20 in series. The multiple battery cells 10 are arranged along a second direction Y, and the multiple battery cells 10 are electrically connected to each other through a busbar 60.

[0075] like Figure 4 As shown, this application illustrates a plurality of battery cells 10 (in...) according to one embodiment of the present application. Figure 4 The diagram shows a structure of three battery cells 10, each of which has two individual battery cells 20.

[0076] The battery cell 20 includes a can 21, two electrode terminals 214 with opposite polarities, and one or more electrode assemblies (not shown) disposed within the can 21. The shape of the can 21 depends on the combined shape of the one or more electrode assemblies; for example, the can 21 can be a hollow cuboid, cube, or cylinder. The can 21 includes a housing 211 and an end cap 212. The housing 211 has an opening at one end along a first direction X, allowing one or more electrode assemblies to be placed into the can 21 through the opening, and the opening is closed by the end cap 212. The can 21 is filled with an electrolyte, such as an electrolyte solution. Figure 4 As shown, the shell 211 has openings at both ends along the first direction X, and the tank 21 includes two end caps 212, which respectively close the openings at both ends of the shell 211.

[0077] Two electrode terminals 214, representing a positive electrode terminal and a negative electrode terminal respectively, are respectively disposed at both ends of the can body 21 along the first direction. Specifically, the two electrode terminals 214 are respectively disposed on two end caps 212, and at least one electrode terminal 214 protrudes from the can body 21 in a direction away from the interior of the battery cell 20. Since the two electrode terminals 214 are respectively disposed on two end caps 212, the electrode terminals 214 can be insulated from the end caps 212. Therefore, the can body 21 can be made insulated from the positive and / or negative electrodes and not energized. When the can body 21 is not energized, the probability of short circuit can be reduced, thereby improving the safety performance of the battery cell 20.

[0078] like Figure 4 As shown, multiple (in Figure 4 The diagram shows two battery cells 20 arranged along a first direction X and electrically connected to each other to form a battery unit 10. In this embodiment, the electrode terminals 214 of each of the two electrically connected battery cells 20 protrude from the can 21 in a direction away from the interior of the battery cell 20. It should be noted that, alternatively, the electrode terminals 214 of one of the two battery cells 20 may protrude from the can 21 in a direction away from the interior of the battery cell 20, while the electrode terminals 214 of the other battery cell 20 are flush with the end cap 212. Alternatively, both electrode terminals 214 of each battery cell 20 may protrude from the can 21 in a direction away from the interior of the battery cell 20. In this embodiment, the electrode terminals 214 of the two battery cells 20 are directly connected to achieve electrical connection. It should be noted that the electrical connection of the two battery cells 20 can also be achieved through a connecting structure such as a connecting piece. The electrode terminals 214 can be various shapes such as cylindrical, cuboid, cube, polygonal prism, etc.; the electrode terminals shown in this embodiment are cylindrical. The battery cell 20 can be a cuboid, cube, or cylinder; in this embodiment, the battery cell shown is a cylindrical structure. When the battery cell is cylindrical, the "first direction" mentioned above in this application refers to the axial direction of the battery cell.

[0079] like Figure 5 The diagram shown is an enlarged structural schematic of the electrical connection portion of two battery cells 20 according to an embodiment of this application.

[0080] In the first direction X, the sampling element 30 is at least partially located between two adjacent battery cells 20 and connected to an electrode terminal 214 protruding from the canister 21 for signal acquisition from the connected battery cells 20. Specifically, in the first direction X, a gap 213 is formed between the canisters 21 of two adjacent battery cells 20, and the sampling element 30 is at least partially located in the gap 213.

[0081] Battery 1 also has a mounting plate 31, which is connected at both ends along the first direction X to the canisters 21 of two adjacent battery cells 20, thereby connecting the mounting plate 31 to the battery cells 20.

[0082] One of two adjacent battery cells 20 has a pressure relief mechanism 50, which is located at one end of the battery cell 20 along the first direction X. A protective member 51 is provided on the surface of the sampling member 30 facing the pressure relief mechanism 50. The protective member 51 is disposed opposite to the pressure relief mechanism 50. An exhaust space is formed between the protective member 51 and the pressure relief mechanism 50 in the first direction X.

[0083] Therefore, the pressure relief mechanism 50 faces the gap 213 between the two battery cells 20, and the portion of the sampling element 30 for electrical connection with the electrode terminal 214 is located in this gap 213. The technical solution of this application positions the protective member 51 between two adjacent battery cells 20 and opposite the pressure relief mechanism 50. In the event of thermal runaway, the protective member 51 can provide heat insulation and fire prevention, preventing the heat generated by the thermally runaway battery cell 20 from being further conducted to the other battery cell 20 opposite it. Furthermore, by forming an exhaust space between the protective member 51 and the pressure relief mechanism 50, gas can be easily discharged, preventing the problem of thermal runaway propagation.

[0084] like Figure 6 The diagram shown is a schematic diagram of the structure of a sampling member 30 with a protective member 51 formed according to an embodiment of this application.

[0085] The electrode terminal 214 includes two end faces disposed along a first direction X and a circumferential sidewall connecting the two end faces. The sampling member 30 has a connecting portion 301 for electrical connection with the protruding electrode terminal 214. The connecting portion 301 of the sampling member 30 is used to connect to the circumferential sidewall of the electrode terminal 214 for signal acquisition. In this application, the electrode terminal 214 can be various shapes such as cylindrical, cuboid, cube, polygonal prism, etc. In this embodiment, when the electrode terminal is cylindrical, the circumferential sidewall refers to the circumferential side surface of the cylinder. The sampling member 30 is fixed to the mounting plate 31 and mounted to the battery cell 20 via the mounting plate 31. The specific structure of the sampling member 30 and the mounting plate 31 will be described later based on... Figures 11-13 A detailed explanation will follow.

[0086] The protective member 51 is fixed to the sampling member 30. The protective member 51 is located between two adjacent battery cells 20 and is disposed opposite to the pressure relief mechanism 50, and there is a venting space between the protective member 51 and the pressure relief mechanism 50. In this embodiment, the protective member 51 is formed in a planar shape.

[0087] Optionally, the protective component 51 is integrally formed with the sampling component 30. Alternatively, the protective component 51 is separately formed from the sampling component 30, and the protective component 51 is fixed to the sampling component 30. For example, the protective component 51 can be integrally formed with the sampling component 30 by means of in-mold injection molding, or it can be connected together by snap-fit, or it can be combined with the sampling component 30 by means of hot-press riveting or gluing.

[0088] The protective component 51 includes thermal insulation material. Furthermore, a fire-retardant material is coated on the surface of the protective component 51. Thus, the protective component 51 can block the discharge ejected from the pressure relief mechanism 50 from spraying towards the opposing battery cell 20, preventing thermal runaway caused by the discharge hitting the opposing battery cell 20. In addition to blocking the discharge, the protective component 51 can also cool and extinguish the discharge. The protective component 51 can be made of one or a combination of mica, ceramic felt, aerogel, and glass fiber.

[0089] To effectively guide the excrement ejected from the pressure relief mechanism 50, the protective member 51 is at least partially disposed opposite to the pressure relief mechanism 50. For example, the area of ​​the portion of the protective member 51 disposed opposite to the pressure relief mechanism 50 is 0.35 to 1.5 times the area of ​​the pressure relief mechanism 50. By ensuring that the area of ​​the portion of the protective member 51 disposed opposite to the pressure relief mechanism 50 in the first direction X is within this range, the excrement ejected from the pressure relief mechanism 50 can be effectively blocked, the exhaust from the pressure relief mechanism 50 can be well guided, and thermal runaway of adjacent battery cells 20 can be prevented.

[0090] like Figure 7 The diagram shown is a structural schematic of a protective member 51 according to an embodiment of this application.

[0091] In this embodiment, the surface A of the protective member 51 opposite to the pressure relief mechanism 50 is a plane. The protective member 51 includes a base portion 511 and a protrusion 512. The base portion 511 is disposed opposite to the pressure relief mechanism 50, and the protrusion 512 is located at both ends of the base portion 511 along the second direction Y and extends from the base portion 511 toward the pressure relief mechanism 50. The second direction Y is perpendicular to the first direction X. Alternatively, the protrusion 512 may be formed only at one end of the base portion 511 along the second direction Y. The surface of the protrusion 512 adjacent to the base portion 511 is a curved surface B, and the curved surface B is formed in a recessed manner toward the base portion 511.

[0092] By adopting the above structure, the base portion 511 of the protective member 51 is disposed opposite to the pressure relief mechanism 50 to prevent the excrement ejected from the pressure relief mechanism 50 from spraying onto the oppositely disposed battery cell 20. Furthermore, by forming a protrusion 512 at one end of the base portion 511 along the second direction Y, it is possible to prevent the excrement from directly spraying onto other adjacent battery cells 20, thereby reducing adverse effects on other battery cells 20 adjacent at one end of the second direction Y. Further, the protective member 51 may have protrusions 512 at both ends of the base portion 511 along the second direction Y. This can more effectively prevent the excrement from directly spraying onto other adjacent battery cells 20, thereby reducing adverse effects on other battery cells 20 adjacent at both ends of the second direction Y. Moreover, by connecting the protrusion 512 to the base portion 511 with a curved surface, the excrement ejected from the pressure relief mechanism 50 can be smoothly guided.

[0093] In this embodiment, the protective member 51 is shown to have a planar surface opposite to the pressure relief mechanism 50, but the protective member 51 can also have a curved surface opposite to the pressure relief mechanism 50.

[0094] like Figure 8 The diagram shown is a schematic representation of a structure in which guide strips 501 are formed on the protective member 51 according to an embodiment of this application. Multiple protruding guide strips 501 are provided on the surface of the protrusion 512 adjacent to the base portion 511. These guide strips 501 are arranged along a third direction Z, which is perpendicular to the first direction X and the second direction Y. Because guide strips 501 for guiding flow are formed, and multiple guide strips 501 are arranged along the third direction Z, these guide strips 501 can be used to better guide excrement towards the second direction Y of the pressure relief mechanism 50.

[0095] Furthermore, multiple protrusions 502 are formed between two adjacent guide strips 501. The height of the protrusions 502 protruding from the surface of the protective member 51 is less than the height of the guide strips 501 protruding from the surface of the protective member 51. Such protrusions 502 can more effectively reduce the flow rate of excrement, and the protrusions 502 do not affect the guiding effect of the guide strips 501 on the excrement.

[0096] like Figure 9 The diagram shows the structure of the protective member 51 according to another embodiment of this application. In this embodiment, the surface of the protective member 51 opposite to the pressure relief mechanism 50 is a curved surface, and this curved surface is smoothly connected to the curved surface connecting the base portion 511 and the protrusion 512 to form an integral unit. This allows the flow of excrement ejected from the pressure relief mechanism 50 to be as... Figure 9 As indicated by the middle arrow, it is smoothly guided to both ends of the second direction Y. Additionally, Figure 8 The guide strip 501 and protrusion 502 shown can both be formed in Figure 9 On the protective member 51 shown, the protrusion 512 may also be formed only at one end of the base portion 511 along the second direction Y.

[0097] like Figure 10 The diagram shown is a structural schematic of an embodiment of this application, in which a vent hole 503 is formed on the mounting plate 31, and a guide member 504 is formed to guide exhaust to the vent hole 503.

[0098] Multiple (in) are formed on the mounting plate 31 Figure 10 The diagram shows a vent 503, and a guide 504 is provided on the mounting plate 31 in the area adjacent to the vent 503 for guiding the discharge from the pressure relief mechanism 51 to the vent 503. Thus, the guide 504 can guide the discharge from the pressure relief mechanism 50 to the vent 503, thereby further preventing thermal runaway from occurring in adjacent battery cells 20.

[0099] The guide 504 can also be an integral part of the mounting plate 31, and the guide 504 has an inclined surface that slopes from the protective member 51 toward the vent 503. That is, the guide 504 is part of the mounting plate 31, and the mounting plate 31 forms an inclined surface that slopes from the protective member 51 toward the vent 503 to guide the excrement discharged from the pressure relief mechanism 50 toward the vent 503 of the mounting plate 31.

[0100] like Figure 11 The diagram shown is a schematic representation of the assembly structure of the sampling component 30 and the mounting plate 31 according to an embodiment of this application. Figure 11 (a) is a three-dimensional structural diagram of the sampling component 30 separated from the mounting plate 31 in this embodiment. Figure 11(b) is a side view of the sampling component 30 and the mounting plate 31 installed between two adjacent battery cells 20 in this embodiment. Figure 11 (c) is a three-dimensional structural diagram of the sampling component 30 and the mounting plate 31 combined in this embodiment.

[0101] like Figure 11 As shown in (a), the mounting plate 31 has a mounting portion 310 and two extension portions 312. The mounting portion 310 is connected between the two extension portions 312 and is used to fix it to the sampling member 30. The sampling member 30 has a connecting portion 301 and a fixing portion 302. The extending direction of the fixing portion 302 intersects the extending direction of the connecting portion 301, so that the sampling member 30 is formed, for example, in a figure-7 shape or a T shape.

[0102] A sampling element 30 may have multiple connecting portions 301 arranged along the second direction Y, each connecting portion 301 being connected to the circumferential sidewall of a corresponding electrode terminal 214 of a battery cell 10 arranged in the second direction Y. Furthermore, a mounting plate 31 also extends in the second direction Y, enabling the mounting of multiple sampling elements 30. Figure 11 (a) shows the structure of the sampling element 30 having three connecting parts 301. As a result, the sampling element 30 can simultaneously collect electrical signals from multiple battery cells 20 arranged in the second direction Y, and the electrode terminals 214 of the multiple battery cells 20 electrically connected to the multiple connecting parts 301 of the sampling element 30 can have equal potentials, thereby achieving voltage equalization of the battery cells 20 and improving the consistency of the battery cells 20.

[0103] like Figure 11 As shown in (b), the two extensions 312 of the mounting plate 31 overlap the canisters 21 of two adjacent battery cells 20. The extensions 312 are flat. The extensions 312 are bonded to the canisters 21 of the battery cells 20, thereby fixing the mounting plate 31 to the canisters 21. The mounting portion 310 of the mounting plate 31 is recessed towards the gap 213 to form a groove 311. Due to the presence of the groove 311, circuit components for transmitting electrical signals can be arranged in the space of the groove 311, thereby improving space utilization and increasing the energy density of the battery.

[0104] The mounting portion 310 engages with the gap 213, and in the first direction X, the width W1 of the mounting portion 310 is approximately the same as the width W of the gap 213. Therefore, when installing the mounting plate 31, the mounting portion 310 can be used for positioning, and it can also prevent movement between two adjacent battery cells 20.

[0105] Electrode terminal 214 includes two end faces disposed along a first direction X and a circumferential sidewall connecting the two end faces. The connecting portion 301 of the sampling member 30 is connected to the circumferential sidewall of the electrode terminal 214 for signal acquisition. The fixing portion 302 of the sampling member 30 passes through the mounting portion 310 and is fixed to the mounting portion 310, thereby fixing the sampling member 30 to the mounting plate 31. In this application, the electrode terminal 214 can be of various shapes such as cylindrical, cuboid, cube, or polygonal prism. In this embodiment, when the electrode terminal is cylindrical, the circumferential sidewall refers to the circumferential surface of the cylinder.

[0106] The mounting plate 31 and the sampling element 30 can be integrally formed by methods such as in-mold injection molding, or they can be separate structures connected by snap-fit ​​or by hot-press riveting. The mounting plate 31 is made of materials such as polycarbonate and polyacrylonitrile (ABS) and has an insulating function. The sampling element 30 is made of materials such as aluminum alloy or steel and is used to collect and transmit signals. The signals collected by the sampling element 30 are transmitted to a signal processor or the like for processing via flexible flat cables (e.g., FFC) or flexible circuit boards (e.g., FPC). The sampling element 30 is exposed on the upper surface of the mounting plate 31 to facilitate contact between the flexible flat cables (or flexible circuit boards) and the sampling element 30 and to transmit the collected signals. In addition, in the embodiment of this application, the extension 312 of the mounting plate 31 is formed as a flat plate for the part that contacts the can of the battery cell 20, but the structure of the mounting plate 31 is not limited to this. It can also be formed as a curved plate that matches the circumferential side shape of the can of the battery cell 20. Moreover, the battery 1 may also include a temperature sampler. The temperature sampler can be mounted on the mounting plate 31 and contact the canister 21 of the battery cell 20 to measure the temperature.

[0107] In this embodiment, the connecting part 301 is snapped onto the circumferential sidewall of the electrode terminal 214. For example... Figure 11 As shown in (c), the connecting portion 301 has an opening 304 on the side opposite to the mounting plate 31, and this opening 304 is elastic. When assembling the connecting portion 301 to the electrode terminal 214, the opening 304 first opens through elastic deformation, and then engages with the circumferential sidewall of the electrode terminal 214. After assembly, the elastic restoring force of the opening 304 maintains the engagement with the electrode terminal 214, thereby ensuring a tight fit with the electrode terminal 214. This installation structure is simple and convenient, requiring no additional fixing structure. At the same time, it can make full use of the gap 213 between the two battery cells 20 without occupying too much space for the battery cells 20, thus correspondingly increasing the energy density of the battery.

[0108] To achieve a stable electrical connection, the enclosure size of the connecting portion 301 around the electrode terminal 214 is greater than or equal to half the circumference of the circumferential sidewall of the electrode terminal 214 and less than the circumference of the circumferential sidewall of the electrode terminal 214. Since the connecting portion 301 has an opening for engaging the circumferential sidewall of the electrode terminal 214 and encloses the electrode terminal 214 over a large area, structural stability can be improved.

[0109] When the electrode terminal 214 protruding from the tank 21 is cylindrical, the wrapping angle of the connecting part 301 around the electrode terminal 214 is greater than or equal to 180 degrees and less than 360 degrees. Since the electrode terminal 214 is cylindrical, the sampling member 30 can be more easily installed on the electrode terminal 214.

[0110] like Figure 11 As shown in (c), multiple protrusions 303 may be provided on the inner surface of the sampling member 30 for clamping the circumferential side surface of the electrode terminal 214. To further improve the assembly accuracy and stability of the sampling member 30 and the electrode terminal 214, multiple recesses corresponding to the protrusions 303 are formed on the circumferential side surface of the electrode terminal 214, which cooperate with the protrusions 303. This prevents the connecting part 301 from moving or rotating relative to the electrode terminal 214, thereby improving connection stability.

[0111] like Figure 12 The diagram shown is a schematic representation of the assembly structure of the sampling component 30 and the mounting plate 31 according to another embodiment of this application. Figure 12 (a) is a three-dimensional structural diagram of the sampling component 30 separated from the mounting plate 31 in this embodiment. Figure 12 (b) is a side view of the sampling component 30 and the mounting plate 31 installed between two adjacent battery cells 20 in this embodiment. Figure 12 (c) is a three-dimensional structural diagram of the sampling component 30 and the mounting plate 31 combined in this embodiment.

[0112] In this embodiment, the connecting portion 301 of the sampling member 30 is completely fitted to the circumferential sidewall of the electrode terminal 214. Moreover, in the first direction X, the size W2 of the connecting portion 301 is approximately the same as the size W of the gap 213. Thus, the connecting portion 301 can fit precisely into the gap 213 between the two battery cells 20.

[0113] In this embodiment, with Figure 11Similarly, in the illustrated embodiment, the connecting portion 301 engages with the circumferential sidewall of the electrode terminal 214. The connecting portion 301 has an opening 304 on the side opposite to the mounting plate 31, and this opening 304 is elastic. When assembling the connecting portion 301 to the electrode terminal 214, the opening 304 first opens through elastic deformation, then engages with the circumferential sidewall of the electrode terminal 214. After assembly, the elastic restoring force of the opening 304 maintains the engagement with the electrode terminal 214, thus ensuring a tight fit. To achieve a stable electrical connection, the enclosure dimension of the connecting portion 301 around the electrode terminal 214 is greater than or equal to half the circumference of the circumferential sidewall of the electrode terminal 214 and less than the circumference of the circumferential sidewall of the electrode terminal 214. When the electrode terminal 214 protruding from the tank 21 is cylindrical, the enclosure angle of the connecting portion 301 around the electrode terminal 214 is greater than or equal to 180 degrees and less than 360 degrees.

[0114] like Figure 12 As shown in (c), the end 305 at the opening 304 of the connecting portion 301 is bent toward the mounting plate 31. This prevents the sharp end 305 of the connecting portion 301 from contacting the circumferential side of the electrode terminal 214, thus preventing damage to the electrode terminal 214 during the snap-fit ​​process. Furthermore, the end 305 can be used to secure the sampling member 30, further preventing the sampling member 30 from falling off the electrode terminal 214.

[0115] In addition, Figure 3 When the multiple battery cells 10 shown are arranged in the second direction Y, the end 305 is housed in the gap between adjacent battery cells 10 in the Y direction. This not only reduces damage to the circumferential sides of the battery cell 20 by the connecting part 301, but also makes efficient use of space.

[0116] like Figure 13 The image shown is a schematic perspective view of the structure of the sampling component 30 according to another embodiment of this application. Figure 13 (a) indicates that the connecting part 301 of the sampling member 30 is not in contact with the electrode terminal 214 and has not yet undergone elastic deformation. Figure 13 (b) indicates that the connecting part 301 of the sampling member 30 contacts the electrode terminal 214 and is elastically deformed to fit the shape of the circumferential side of the electrode terminal 214.

[0117] The sampling component 30 has a connecting portion 301 and a fixing portion 302. In this embodiment, the connecting portion 301 is also connected to the circumferential sidewall of the electrode terminal 214. The connecting portion 301 is elastic and can deform in response to external force to conform to the circumferential sidewall of the electrode terminal 214, thereby achieving surface contact with the electrode terminal 214. The external force can be the weight of the battery cell 20 itself, the pressure during battery assembly, the fixing force of other fixing components, etc. When the electrode terminal 214 protruding from the can 21 is cylindrical, the wrapping angle of the connecting portion 301 around the electrode terminal 214 is greater than 0 degrees and less than 180 degrees.

[0118] Therefore, the elastic deformation of the connecting portion 301 allows it to adaptively conform to the circumferential sidewall of the electrode terminal 214, achieving good surface contact with the electrode terminal 214 and thus more stably realizing the electrical connection between the sampling member 30 and the electrode terminal 214. The connecting portion 301 is fixed to the support member 306 via the fixing portion 302.

[0119] In another embodiment of this application, both electrode terminals 214 of each battery cell 20 protrude from the can 21 in a direction away from the interior of the battery cell 20, and in two adjacent battery cells 20, the electrode terminals 214 of one battery cell 20 are arranged opposite to and abut against the electrode terminals 214 of the other battery cell 20. Moreover, the electrode terminals 214 of one battery cell 20 are welded together with the electrode terminals 214 of the other battery cell 20.

[0120] Since the electrode terminals 214 of two adjacent battery cells 20 are directly abutted to achieve electrical connection, the number of electrical connection components can be reduced, and the energy density of the battery can be increased. Furthermore, by directly welding the two protruding electrode terminals 214 in this manner, a stable electrical connection between two adjacent battery cells 20 can be achieved.

[0121] When welding the two electrode terminals 214, uneven welding areas are often formed on the two electrode terminals 214. By offsetting the contact area between the sampling element 30 and the electrode terminal 214 from the welding area of ​​the electrode terminal 214 in the first direction X, it is possible to avoid poor contact caused by the sampling element connecting to the welding area, which would reduce the sampling accuracy, and also improve the assembly accuracy.

[0122] One embodiment of this application also provides an electrical device that may include the battery 1 from the foregoing embodiments. The battery 1 is used in this electrical device to provide electrical energy.

[0123] The foregoing described the battery and power-consuming device of the present application embodiments. The following will describe the method and apparatus for preparing the battery of the present application embodiments, wherein parts not described in detail can be referred to the foregoing embodiments.

[0124] Figure 14 A schematic flowchart of a method 400 for preparing a battery according to an embodiment of this application is shown. Figure 14 As shown, the method 400 may include:

[0125] 410, providing a plurality of battery cells 20, the plurality of battery cells 20 being arranged along a first direction X and electrically connected to each other, at least one of two adjacent battery cells 20 having a pressure relief mechanism 50, the pressure relief mechanism 50 being disposed at one end of the battery cell 20 along the first direction X;

[0126] 420, provides a sampling element 30, which is connected to the battery cell 20 for signal acquisition from the battery cell 20; and

[0127] 430, a protective member 51 is provided, which is located between two adjacent battery cells 20 and is disposed opposite to the pressure relief mechanism 50. An exhaust space is provided between the protective member 51 and the pressure relief mechanism 50.

[0128] Among them, the protective component 51 is fixed to the sampling component 30.

[0129] Figure 15 A schematic block diagram of a battery fabrication apparatus 500 according to one embodiment of this application is shown. Figure 15 As shown, the battery manufacturing apparatus 500 may include: a first providing module 510, a second providing module 520, and an mounting module 530.

[0130] The first providing module 510 is used to provide a plurality of battery cells 20, which are arranged along a first direction X and electrically connected to each other. At least one of two adjacent battery cells 20 has a pressure relief mechanism 50, which is disposed at one end of the battery cell 20 along the first direction X.

[0131] The second providing module 520 is used to provide the sampling piece 30 with the protective component 51 fixed on it;

[0132] The mounting module 530 is used to connect the sampling element 30 to the battery cell 20, the sampling element 30 is used to collect signals from the battery cell 20; and it is used to position the protective member 51 between two adjacent battery cells 20 and opposite to the pressure relief mechanism 51, with an exhaust space between the protective member 51 and the pressure relief mechanism 50.

[0133] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended 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 they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A battery, comprising: Multiple battery cells are arranged along a first direction and electrically connected to each other, and at least one of two adjacent battery cells has a pressure relief mechanism, which is disposed at one end of the battery cell along the first direction. A sampling device, connected to the battery cell, is used to acquire signals from the battery cell; and A protective component is located between two adjacent battery cells and is positioned opposite the pressure relief mechanism. An exhaust space exists between the protective component and the pressure relief mechanism. The protective component is fixed to the sampling component. Each of the battery cells includes a can and two electrode terminals of opposite polarity, the two electrode terminals being respectively disposed at both ends of the can along the first direction, and at least one of the electrode terminals protruding from the can in a direction away from the interior of the battery cell. In the first direction, a gap is formed between two adjacent battery cells, the connecting part of the sampling member is located in the gap, the connecting part is used to connect the electrode terminal of the battery cell, and the protective member is fixed to the connecting part.

2. The battery according to claim 1, wherein, The surface of the protective component that is opposite to the pressure relief mechanism is a plane.

3. The battery according to claim 1, wherein, The surface of the protective component opposite to the pressure relief mechanism is curved.

4. The battery according to claim 1, wherein, The protective component includes a base portion and a protrusion portion. The base portion is disposed opposite to the pressure relief mechanism. The protrusion portion is located at one end of the base portion along a second direction and extends from the base portion toward the pressure relief mechanism. The second direction is perpendicular to the first direction.

5. The battery according to claim 4, wherein, The protective member has the protrusion at both ends of the base portion along the second direction.

6. The battery according to claim 4 or 5, wherein, The surface of the protrusion adjacent to the base portion is curved, and the curved surface is formed in a way that it is recessed into the base portion.

7. The battery according to claim 6, wherein, The protrusion has a plurality of protruding guide strips on the surface adjacent to the base portion. The plurality of guide strips are arranged along a third direction, which is perpendicular to the first direction and the second direction.

8. The battery according to claim 7, wherein, Multiple protrusions are formed between two adjacent guide strips.

9. The battery according to claim 8, wherein, The protrusion protrudes from the surface of the protective member at a height less than the guide strip protrudes from the surface of the protective member.

10. The battery according to claim 1, wherein, The area of ​​the portion of the protective component that is opposite to the pressure relief mechanism is 0.35 to 1.5 times the area of ​​the pressure relief mechanism.

11. The battery according to claim 1, wherein, It also has a mounting plate, which is connected to two adjacent battery cells at both ends along the first direction, and the mounting plate is used to fix the sampling element.

12. The battery according to claim 11, wherein, The mounting plate has a plurality of vent holes, and a guide is provided in the area of ​​the mounting plate adjacent to the vent holes for guiding the excrement discharged from the pressure relief mechanism to the vent holes.

13. The battery according to claim 12, wherein, The guide and the mounting plate are an integral structure, and the guide has an inclined surface that slopes from the protective member toward the vent.

14. The battery according to claim 1, wherein, The connecting part is connected to the circumferential sidewall of the electrode terminal.

15. The battery according to claim 14, wherein, The connecting portion is elastic and configured to deform in response to external forces to conform to the circumferential sidewall of the electrode terminal, thereby achieving surface contact with the electrode terminal.

16. The battery according to claim 15, wherein, The electrode terminal protruding from the tank is cylindrical, and the angle of the connection portion wrapping around the electrode terminal is greater than 0 degrees and less than 180 degrees.

17. The battery according to claim 14, wherein, The connecting part is engaged with the circumferential sidewall of the electrode terminal.

18. The battery according to claim 14, wherein, The connecting part fits completely against the sidewall of the electrode terminal.

19. The battery according to claim 17, wherein, The size of the connection portion covering the electrode terminal is greater than or equal to half the circumference of the side wall of the electrode terminal and less than the circumference of the side wall of the electrode terminal.

20. The battery according to claim 17, wherein, The electrode terminal protruding from the tank is cylindrical, and the angle of the connection portion wrapping around the electrode terminal is greater than or equal to 180 degrees and less than 360 degrees.

21. The battery according to claim 17, wherein, The inner surface of the connector is provided with a plurality of protrusions for clamping the circumferential sidewall of the electrode terminal.

22. The battery according to claim 21, wherein, The circumferential sidewall of the electrode terminal is formed with a plurality of recesses corresponding to the protrusions, and the protrusions and recesses engage with each other.

23. The battery according to any one of claims 14 to 22, wherein, Both electrode terminals of each battery cell protrude from the can body in a direction away from the interior of the battery cell, and in two adjacent battery cells, the electrode terminals of one battery cell are arranged opposite to and abut against the electrode terminals of the other battery cell.

24. The battery according to claim 23, wherein, In two adjacent battery cells, the electrode terminals of one battery cell are welded together with the electrode terminals of the other battery cell.

25. The battery according to claim 1, wherein, In two adjacent battery cells, the electrode terminal of one battery cell is welded together with the electrode terminal of the other battery cell, and the contact area between the sampling element and the electrode terminal is offset from the welding area of ​​the electrode terminal along the first direction.

26. An electrical device comprising a battery according to any one of claims 1 to 25, said battery being used to provide electrical energy.

27. A method for preparing a battery, comprising: A plurality of battery cells are provided, the plurality of battery cells are arranged along a first direction and electrically connected to each other, and at least one of two adjacent battery cells has a pressure relief mechanism disposed at one end of the battery cell along the first direction; A sampling device is provided, the sampling device being connected to the battery cell for acquiring signals from the battery cell; and A protective component is provided, located between two adjacent battery cells and disposed opposite to the pressure relief mechanism, with an exhaust space between the protective component and the pressure relief mechanism. The protective component is fixed to the sampling component. Each of the battery cells includes a can and two electrode terminals of opposite polarity, the two electrode terminals being respectively disposed at both ends of the can along the first direction, and at least one of the electrode terminals protruding from the can in a direction away from the interior of the battery cell. In the first direction, a gap is formed between two adjacent battery cells, the connecting part of the sampling member is located in the gap, the connecting part is used to connect the electrode terminal of the battery cell, and the protective member is fixed to the connecting part.

28. An apparatus for manufacturing a battery, comprising: A first providing module is used to provide a plurality of battery cells, the plurality of battery cells being arranged along a first direction and electrically connected to each other, and at least one of two adjacent battery cells having a pressure relief mechanism disposed at one end of the battery cell along the first direction. The second providing module is used to provide a sampling component with a fixed protective member; The mounting module is used to connect the sampling element to the battery cell, the sampling element being used to acquire signals from the battery cell; and it is also used to position the protective member between two adjacent battery cells, and opposite to the pressure relief mechanism, with an exhaust space between the protective member and the pressure relief mechanism. Each of the battery cells includes a can and two electrode terminals with opposite polarities. The two electrode terminals are respectively disposed at both ends of the can along the first direction, and at least one of the electrode terminals protrudes from the can in a direction away from the interior of the battery cell. In the first direction, a gap is formed between two adjacent battery cells, the connecting part of the sampling member is located in the gap, the connecting part is used to connect the electrode terminal of the battery cell, and the protective member is fixed to the connecting part.

Images