Battery and manufacturing method and manufacturing apparatus thereof, electric device

Abstract

The application relates to a battery and a manufacturing method and manufacturing equipment thereof, and a power utilization device, and belongs to the technical field of battery manufacturing. The application provides a battery, which comprises a battery monomer and a busbar component. The battery monomer comprises an electrode terminal, and a recess is arranged on the end face of the electrode terminal. The busbar component comprises a body and a convex part. The body has a first surface and a second surface which are oppositely arranged in the thickness direction of the body. The convex part protrudes from the first surface. The convex part is configured to be inserted into the recess and is in interference fit with the recess, so as to realize the electrical connection between the busbar component and the battery monomer. The components in the battery are easy to disassemble, and the structure of the components is not damaged, so that the recycling cost of the battery is reduced. The application further provides a power utilization device comprising the battery. The application further provides a manufacturing method and equipment of the battery.

Description

Technical Field

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

[0002] With the continued boom in the new energy vehicle market, a large number of new energy vehicles have entered the market. These vehicles use power batteries for energy, and these batteries may age or break down after prolonged use, requiring replacement to extend the driving range. Due to rising raw material costs and the large quantity of used batteries, recycling and dismantling old batteries for reuse can not only reduce replacement costs but also decrease the consumption of raw materials.

[0003] However, because the possibility of recycling was not considered during the initial assembly of the battery, the internal components of the battery are usually connected in a non-removable manner, which makes the battery difficult to disassemble and can cause irreversible damage to the internal components, resulting in high recycling costs. Summary of the Invention

[0004] Therefore, this application proposes a battery, a method and apparatus for manufacturing the battery, and an electrical device, wherein the internal components of the battery are easy to disassemble without damaging the structure of the components, thereby reducing the cost of battery recycling.

[0005] The first aspect of this application provides a battery, comprising: a battery cell including an electrode terminal, wherein a recess is provided on the end face of the electrode terminal; a busbar component including a body and a protrusion, the body having a first surface and a second surface disposed opposite to each other in its thickness direction, the protrusion protruding from the first surface, the protrusion being configured to insert into the recess and to have an interference fit with the recess, thereby realizing an electrical connection between the busbar component and the battery cell.

[0006] In the battery of this embodiment, the current collector has a protrusion, and a recess is provided on the end face of the electrode terminal. The protrusion is inserted into the recess and is interference-fitted with the recess, which on the one hand realizes the electrical connection between the current collector and the battery cell, and on the other hand realizes the detachable connection between the current collector and the battery cell. When disassembling the battery, the protrusion and the recess are separated to separate the current collector from the battery cell. This not only facilitates disassembly but also does not damage the structure of the electrode terminals of the current collector and the battery cell, maintaining the integrity of the current collector and the battery cell. This facilitates the secondary use of the current collector and the battery cell and reduces the recycling cost of the battery.

[0007] According to some embodiments of this application, the protrusion includes an annular sidewall, the central axis of which extends along the thickness direction of the body, one end of which is connected to the body, and the other end which forms an opening, and the outer peripheral surface of which is used for interference fit with the inner wall of the recess.

[0008] In the above scheme, the outer peripheral surface of the annular sidewall abuts against the inner wall of the recess, and the end of the annular sidewall away from the body forms an opening. The side of the annular sidewall with the opening can undergo slight deformation, so that the annular sidewall expands radially to make an interference fit with the inner wall of the recess.

[0009] According to some embodiments of this application, the body is provided with a through hole, and one end of the annular sidewall is connected to the hole wall of the through hole.

[0010] In the above scheme, the body is provided with a through hole that communicates with one end of the annular sidewall. This not only facilitates the processing and forming of the annular sidewall, but also allows external tooling to be used to pass through the through hole and the annular sidewall in sequence, thus opening up the annular sidewall to achieve an interference fit between the outer circumferential surface of the annular sidewall and the inner wall of the recess.

[0011] According to some embodiments of this application, the annular sidewall includes a plurality of sub-sidewalls, which are spaced apart circumferentially along the through hole.

[0012] In the above scheme, there is a gap between two adjacent sub-sidewalls. The outer diameter of the annular sidewall can be changed by radially expanding outward or contracting inward, so that the annular sidewall can be inserted into the recess even when there is a dimensional deviation in the inner diameter of the recess, thus having good tolerance.

[0013] According to some embodiments of this application, the battery further includes: a tensioning member disposed inside the annular sidewall, the outer peripheral surface of the tensioning member being a conical surface; and a driving member for driving the tensioning member to move along the thickness direction of the body to expand the plurality of sub-sidewalls, so that the plurality of sub-sidewalls form an interference fit with the recess.

[0014] In the above scheme, multiple sub-sidewalls are expanded by using a tensioning element, so that the multiple sub-sidewalls and the recess form an interference fit. The outer peripheral surface of the sub-sidewall and the inner wall of the recess have a large contact area, which not only improves the current carrying capacity at the connection between the busbar and the electrode terminal, but also enables the busbar and the electrode terminal to be firmly connected.

[0015] According to some embodiments of this application, the inner circumferential surface of the annular sidewall is a conical surface that matches the outer circumferential surface of the expansion member.

[0016] In the above scheme, the inner circumferential surface abuts against the outer circumferential surface of the expansion member and matches its shape. There is no gap between the inner circumferential surface of the annular sidewall and the outer circumferential surface of the expansion member, thereby pressing the annular sidewall against the inner wall of the recess and improving the current carrying capacity at the connection between the busbar and the electrode terminal.

[0017] According to some embodiments of this application, a first limiting protrusion is provided on the outer peripheral surface of the expansion member. The first limiting protrusion is configured to be inserted into the gap between two adjacent sub-sidewalls to prevent the expansion member from rotating relative to the sub-sidewalls.

[0018] In the above scheme, the first limiting protrusion is inserted between two adjacent sub-side walls, so that the tensioning member can only move along the thickness direction of the body. Since the gap between the two adjacent sub-side walls is used to limit the movement direction of the tensioning member, no additional parts are added, which simplifies the construction and assembly process of the battery.

[0019] According to some embodiments of this application, the expansion member is provided with a threaded hole that extends along the thickness direction of the body, and the driving member is a threaded member that engages with the threaded hole so that when the threaded member rotates, it can drive the expansion member to move along the thickness direction of the body.

[0020] In the above scheme, when the threaded part rotates, it can drive the expansion member to move along the thickness direction of the body, thereby opening up multiple sub-side walls. The structure is simple and easy to implement.

[0021] According to some embodiments of this application, a countersunk groove is provided on the second surface, the countersunk groove is disposed around the through hole, and the countersunk groove is used to receive the head of the threaded part.

[0022] In the above scheme, the sink can accommodate the head of the threaded part, reduce the height of the head of the threaded part protruding from the second surface of the busbar component, make the battery structure compact, and the sink can support the head of the threaded part, so that the position of the threaded part along its axial direction remains unchanged when the threaded part rotates, so as to effectively drive the expansion member to move along the thickness direction of the body.

[0023] According to some embodiments of this application, along the thickness direction of the body, the outer diameter of the end of the expansion member closer to the body is smaller than the outer diameter of the end farther from the body, and the driving member is used to drive the expansion member to move closer to the body to expand the plurality of sub-sidewalls.

[0024] In the above scheme, the expansion member can be inserted into the interior of the annular sidewall from the end away from the body, and the threaded member extends into the through hole from one side of the second surface of the body and is threadedly engaged with the expansion member, so that the body, the threaded member and the expansion member form a pre-assembled assembly, which simplifies the assembly process of the busbar component and the battery cell.

[0025] According to some embodiments of this application, a second limiting protrusion is provided on the outer peripheral surface of the convex portion, and a limiting groove is provided on the inner peripheral surface of the concave portion. The second limiting protrusion engages with the limiting groove to prevent the convex portion from separating from the concave portion along the thickness direction of the body.

[0026] In the above scheme, the second limiting protrusion engages with the limiting groove, which can prevent the protrusion and the concave part from separating along the thickness direction of the body, so that the busbar component is firmly connected to the battery terminal.

[0027] According to some embodiments of this application, the second limiting protrusion is disposed at the end of the protrusion away from the body.

[0028] In the above scheme, the second limiting protrusion can be formed by utilizing the edge of the protrusion away from the body, making the second limiting protrusion easy to form. The limiting groove can be located at the bottom of the concave part, making it easy to process and form the limiting groove.

[0029] According to some embodiments of this application, the battery further includes a sampling terminal, which is integrally formed with the busbar component.

[0030] In the above scheme, the sampling terminal and the busbar are integrally formed, which can reduce the number of internal components of the battery and simplify the battery structure.

[0031] A second aspect of this application provides an electrical device including the battery described in the first aspect of this application, the battery being used to provide electrical energy.

[0032] Due to the characteristics of the battery in the first aspect embodiment of this application, the battery replacement cost of the power-consuming device in the second aspect embodiment of this application is lower.

[0033] A third aspect of this application provides a method for manufacturing a battery, comprising:

[0034] A battery cell is provided, the battery cell including electrode terminals, and a recess is provided on the end face of the electrode terminals;

[0035] A busbar component is provided, the busbar component including a body and a protrusion, the body having a first surface and a second surface disposed opposite to each other in its thickness direction, the protrusion protruding from the first surface;

[0036] The protrusion is inserted into the recess and subjected to an interference fit to achieve electrical connection between the busbar and the battery cell.

[0037] A fourth aspect of this application provides a battery manufacturing apparatus, comprising:

[0038] A first providing device is used to provide a battery cell, the battery cell including an electrode terminal, and a recess is provided on the end face of the electrode terminal;

[0039] A second providing device is used to provide a confluence component, the confluence component including a body and a protrusion, the body having a first surface and a second surface disposed opposite to each other in its thickness direction, the protrusion protruding from the first surface;

[0040] An assembly module is used to insert the protrusion into the recess and make an interference fit with the recess to realize the electrical connection between the busbar and the battery cell.

[0041] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0042] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 The diagram shown is a simplified schematic of a vehicle according to one embodiment of this application;

[0044] Figure 2 What is shown is Figure 1 A schematic diagram of the battery structure in a Chinese vehicle;

[0045] Figure 3 The diagram shown is a schematic representation of the battery structure according to some embodiments of this application;

[0046] Figure 4 What is shown is Figure 3 AA cross-section view;

[0047] Figure 5 yes Figure 4 A magnified view of a section at point B in the middle;

[0048] Figure 6 The diagram shown is a structural schematic of a first form of a busbar component of a battery according to some embodiments of this application;

[0049] Figure 7 What is shown is Figure 6 CC cross-section;

[0050] Figure 8 What is shown is Figure 7 A magnified view of a section at point D;

[0051] Figure 9 The diagram shown is a structural schematic of a second type of busbar component in a battery according to some embodiments of this application;

[0052] Figure 10 What is shown is Figure 9 A partial structural schematic diagram of the protrusion of the busbar component is shown in the figure;

[0053] Figure 11 The diagram shown is a structural schematic of the second type of busbar component and the support member cooperating in a battery according to some embodiments of this application;

[0054] Figure 12 What is shown is Figure 11 EE cross-section diagram;

[0055] Figure 13 What is shown is Figure 12 A magnified view of a section at point F in the middle;

[0056] Figure 14 What is shown is Figure 11 The diagram shows a structural schematic of the support structure in the battery.

[0057] Figure 15 The diagram shown is a schematic diagram of the structure in some embodiments of this application, in which the convex and concave parts are engaged by a second limiting protrusion and a limiting groove;

[0058] Figure 16 The diagram shown is a schematic representation of a battery manufacturing method according to some embodiments of this application;

[0059] Figure 17 The diagram shown is a schematic diagram of a battery manufacturing apparatus according to some embodiments of this application;

[0060] The above figures are not provided to scale.

[0061] Icons: 1000 - Vehicle; 100 - Battery; 10 - Battery cell; 11 - Housing; 12 - Electrode terminal; 121 - End face; 122 - Recess; 1221 - Inner wall; 1222 - Bottom wall; 1223 - Limiting groove; 20 - Busbar component; 21 - Body; 211 - First surface; 212 - Second surface; 213 - Through hole; 2131 - Hole wall; 214 - Countersunk groove; 22 - Protrusion; 221 - Annular sidewall; 2211 - Annular outer circumferential surface; 2212 - Annular inner circumferential surface; 222 - Sub-sidewall; 2221 2222-Sub-outer peripheral surface; 2222-Sub-inner peripheral surface; 2223-First side; 2224-Second side; 2225-First gap; 223-Second limiting protrusion; 30-Expanding member; 31-First end; 32-Second end; 33-Conical outer peripheral surface; 34-Threaded hole; 35-First limiting protrusion; 40-Driver; 41-Head; 42-Rod; 200-Controller; 300-Motor; 2000-Battery manufacturing equipment; 2100-First supply device; 2200-Second supply device; 2300-Assembly module. Detailed Implementation

[0062] 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.

[0063] 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.

[0064] In this application, the term "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.

[0065] In the description of this application, it should be noted that unless otherwise explicitly 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 connection 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.

[0066] In this application, "multiple" means two or more (including two).

[0067] 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, prismatic battery cells, and pouch battery cells.

[0068] 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. A battery generally includes a housing for encapsulating one or more battery cells, which prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0069] A single 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.

[0070] The battery cell also includes a current collector, which is used to electrically connect the tabs and electrode terminals of the battery cell to deliver electrical energy from the electrode assembly to the electrode terminals, and then to the outside of the battery cell via the electrode terminals. Multiple battery cells are electrically connected through a current collector to realize series, parallel or mixed connection of multiple battery cells.

[0071] The busbar is used for electrical connection with the battery cells. Specifically, the busbar is connected to the two electrode terminals of two adjacent battery cells with opposite polarities to realize the series connection of the two battery cells; or the busbar is connected to the electrode terminals of two adjacent battery cells with the same polarity to realize the parallel connection of the two battery cells; or the busbar is connected to the electrode terminal located at the output end to realize the connection between the battery and the external output interface.

[0072] The battery also includes a temperature acquisition system, which comprises sampling terminals and a battery management system. The sampling terminals are connected to the busbar and are used to collect information from individual battery cells, such as voltage or temperature. The sampling terminals transmit the collected information from individual battery cells to the battery management system. When the battery management system detects that the information from a battery cell exceeds the normal range, it limits the battery's output power to achieve safety protection.

[0073] In related technologies, the electrode terminals of the battery cell are welded to the current collector to achieve electrical connection between the current collector and the battery cell. When the battery needs to be disassembled, the current collector needs to be separated from the battery cell. However, the part of the current collector welded to the electrode terminals usually cannot be separated from the electrode terminals, resulting in the current collector being torn and unable to be recycled.

[0074] The inventors discovered through research that when electrode terminals are installed onto the battery cell casing using a riveting process, some of the rivet breaks off during the riveting process and remains inside the electrode terminal, forming a recess on the end face of the electrode terminal. Currently, the busbar component is welded to the end face of the electrode terminal, and the recess only exists as a process groove.

[0075] Based on the above ideas, the inventors of this application propose a technical solution that uses a recess to connect with the current-collecting component, thereby achieving a detachable connection between the electrode terminals and the current-collecting component, allowing the battery cell to be separated from the current-collecting component without damage. This makes it easy to disassemble the internal components of the battery without damaging them, thus reducing the cost of battery recycling.

[0076] It is understood that the battery cells described in the embodiments of this application can directly supply power to electrical devices, or they can be connected in parallel or series to form a battery to supply power to various electrical devices in the form of a battery.

[0077] It is understood that the electrical devices using battery cells or batteries described in the embodiments of this application can take many forms, such as mobile phones, portable devices, laptops, electric vehicles, electric cars, ships, spacecraft, electric toys, and power tools, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers.

[0078] The battery cells and 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 battery cells and batteries. However, for the sake of brevity, the following embodiments are all illustrated using electric vehicles as an example.

[0079] Figure 1 The diagram shown is a simplified schematic of a vehicle according to one embodiment of this application; Figure 2 What is shown is Figure 1 A schematic diagram of the battery structure in a Chinese vehicle.

[0080] like Figure 1As shown, the vehicle 1000 is equipped with a battery 100, a controller 200, and a motor 300. For example, the battery 100 can be installed at the bottom, front, or rear of the vehicle 1000. 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.

[0081] In some embodiments of this application, 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 controller 200 is used to control the power supply provided by the battery 100 to the motor 300, for example, to meet the power requirements of the vehicle 100 during startup, navigation, and driving.

[0082] In 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.

[0083] In this application, the battery 100 mentioned in the embodiments refers to a single physical module comprising one or more battery cells 10 to provide higher voltage and capacity. For example, the battery 100 is composed of multiple battery cells 10 connected in series or in parallel.

[0084] like Figure 2 As shown, the battery 100 includes multiple battery cells 10, a busbar component 20, a sampling terminal (not shown), and a housing (not shown). The multiple battery cells 10 are connected in parallel, series, or mixed to achieve high voltage output. The multiple battery cells 10, the busbar component 20, and the sampling terminal are assembled and placed inside the housing.

[0085] Each battery cell 10 includes a housing 11, an electrode assembly (not shown), and two electrode terminals 12. The housing 11 may be hexahedral or other shapes, and an internal cavity is formed to accommodate the electrode assembly and electrolyte. The housing 11 includes a shell and a cover, with an opening at one end allowing the electrode assembly to be placed inside the shell. The shell may be made of a metallic material, such as aluminum, aluminum alloy, or nickel-plated steel. The electrode assembly is disposed inside the shell. The cover has two electrode lead-out holes, and the two electrode terminals 12 are disposed in the two electrode lead-out holes of the cover. One of the two electrode terminals 12 is a positive electrode terminal 12, and the other is a negative electrode terminal 12. The electrode assembly includes two tabs, one of which is a positive tab and the other is a negative tab. The positive electrode terminal 12 is connected to the positive tab of the electrode assembly, and the negative electrode terminal 12 is connected to the negative tab of the electrode assembly.

[0086] In some embodiments of this application, the housing is cuboid, with an opening on one side along the direction of the housing, and a cover on one side of the housing to close the opening. Both electrode terminals 12 are disposed on the cover, i.e., on the same side along the direction of the battery cell 10.

[0087] Specifically, the length of the housing extends along the first direction X, the width extends along the second direction Y, and the height extends along the third direction Z; the thickness of the cover extends along the third direction Z, the cover closes the opening of the housing, one end of the electrode terminal 12 extends into the interior of the battery cell 10 to connect with the current collector, and the other end is exposed outside the cover to connect with the current collector 20.

[0088] In other embodiments, the housing may also be in other shapes such as a cylinder, and the electrode terminals 12 may also be disposed on the housing.

[0089] The voltage and temperature information on the busbar 20 can reliably reflect the working status of the connected battery cell 10. Sampling the busbar 20 can reliably monitor the working status of the battery cell 10.

[0090] The temperature acquisition system also includes a circuit board. One end of the sampling terminal is connected to the busbar component 20, and the other end is connected to the circuit board. The circuit board is used to receive electrical signals representing voltage or temperature collected by the sampling terminal and transmit them to the battery management system (not shown) so that the battery management system can analyze and determine whether the battery cell 10 is in normal working condition. The sampling terminal abuts against the surface of the busbar component 20 to collect the voltage or temperature of the battery cell 10.

[0091] Specifically, the sampling terminal and the bus component 20 can be welded together, detachably connected by snap-fit ​​or other means, or designed as an integral structure.

[0092] Figure 3 The diagram shown is a schematic representation of the battery structure according to some embodiments of this application; Figure 4 What is shown is Figure 3 AA cross-section view; Figure 5 yes Figure 4 A magnified view of a section at point B.

[0093] like Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, some embodiments of this application propose a battery 100, including a battery cell 10 and a busbar component 20. The battery cell 10 includes an electrode terminal 12, and a recess 122 is provided on the end face 121 of the electrode terminal 12. The busbar component 20 includes a body 21 and a protrusion 22. The body 21 has a first surface 211 and a second surface 212 disposed opposite to each other in its thickness direction. The protrusion 22 protrudes from the first surface 211 and is configured to insert into the recess 122 and to have an interference fit with the recess 122 to realize the electrical connection between the busbar component 20 and the battery cell 10.

[0094] The end face 121 of the electrode terminal 12 refers to the surface of the electrode terminal 12 that is exposed from the housing 11 and faces away from the housing 11.

[0095] In some embodiments of this application, the recess 122 may be formed by recessing the end face 121 of the electrode terminal 12 along a third direction Z; in other embodiments, the recess 122 may also be formed by recessing the end face 121 of the electrode terminal 12 along other directions.

[0096] The recess 122 can be a riveting groove or a groove independently provided on the end face 121 of the electrode terminal 12 to mate with the protrusion 22. The recess 122 can be a smooth circular groove or an elliptical groove, or a non-smooth square groove or a hexagonal groove; the recess 122 can be located at the center of the end face 121 or at other positions on the end face 121.

[0097] The busbar component 20 can be made of copper or aluminum; it can be formed by stamping or casting. The thickness of the body 21 extends along the third direction Z, and the first surface 211 of the body 21 faces the electrode terminal 12, while the second surface 212 faces away from the electrode terminal 12.

[0098] In some embodiments of this application, the protrusion 22 protrudes from the first surface 211 of the body 21 along a third direction Z; in other embodiments, the protrusion 22 may also protrude from the first surface 211 of the body 21 along other directions.

[0099] The protrusion 22 and the recess 122 are shaped to match. For example, when the recess 122 is a circular groove, the protrusion 22 is a cylindrical protrusion; when the recess 122 is a square groove, the recess 122 is a square protrusion. The protrusion 22 can be a solid structure or a hollow structure; the end of the protrusion 22 can be a closed structure or have an opening.

[0100] The interference fit between the protrusion 22 and the recess 122 means that the protrusion 22 is circumferentially tightened inside the recess 122, and the protrusion 22 acts on the inner wall 1221 of the recess 122 in a direction perpendicular to the third direction Z, so that the busbar component 20 is electrically connected to the battery cell 10.

[0101] The protrusion 22 and the recess 122 can prevent the busbar component 20 from detaching from the battery cell 10 by frictional force along the third direction Z; the protrusion 22 and the recess 122 can also be provided with other anti-detachment structures to prevent the busbar component 20 from detaching from the battery cell 10. The protrusion 22 can be inserted into the recess 122 by applying external force and having an interference fit with the recess 122; the protrusion 22 can also be further opened by inserting other components into the interior of the protrusion 22 to have an interference fit with the recess 122. The components that open the protrusion 22 can be tooling outside the battery 100 or components left inside the battery 100.

[0102] In the battery 100 of this embodiment, the busbar component 20 has a protrusion 22, and a recess 122 is provided on the end face 121 of the electrode terminal 12. The protrusion 22 is inserted into the recess 122 and is press-fitted with the recess 122, which on the one hand realizes the electrical connection between the busbar component 20 and the battery cell 10, and on the other hand realizes the detachable connection between the busbar component 20 and the battery cell 10. When disassembling the battery 100, the protrusion 22 and the recess 122 are separated to separate the busbar component 20 from the battery cell 10. This not only facilitates disassembly, but also does not damage the structure of the electrode terminal 12 of the busbar component 20 and the battery cell 10, thus maintaining the integrity of the busbar component 20 and the battery cell 10. This facilitates the secondary use of the busbar component 20 and the battery cell 10 and reduces the recycling cost of the battery 100.

[0103] Figure 6 The diagram shown is a structural schematic of a first form of a busbar component of a battery according to some embodiments of this application; Figure 7 What is shown is Figure 6 CC cross-section; Figure 8 What is shown is Figure 7 A magnified view of a section at point D.

[0104] like Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, in some embodiments of this application, the protrusion 22 includes an annular sidewall 221, the central axis of which extends along the thickness direction of the body 21, one end of which is connected to the body 21, and the other end is enclosed to form an opening, and the outer peripheral surface of the annular sidewall 221 is used to interfere with the inner wall 1221 of the recess 122.

[0105] Specifically, the central axis of the annular sidewall 221 extends along the third direction Z, one end of the annular sidewall 221 is connected to the first surface 211 of the body 21, and the other end encloses to form an opening.

[0106] like Figure 5 and Figure 8 As shown, along the Z-direction surrounding the third, the annular sidewall 221 has an annular outer peripheral surface 2211 and an annular inner peripheral surface 2212; the recess 122 has an inner wall 1221 that is interference-fitted with the annular peripheral surface and a bottom wall 1222 that corresponds to the opening of the annular sidewall 221.

[0107] Along the third direction Z, the annular sidewall 221 can be a constant cross-section structure or a variable cross-section structure; the thickness of the annular sidewall 221 can be the same or can gradually become thinner from one end connected to the body 21 to the other end; the annular sidewall 221 can be a circumferentially closed annular sidewall or a circumferentially gapped sidewall.

[0108] The body 21 may have a through hole 213, and the annular sidewall 221 is connected to the through hole 213; the body 21 may also not have a through hole 213, and the annular sidewall 221 protrudes from the first surface 211 of the body 21.

[0109] In the above scheme, the annular outer peripheral surface 2211 of the annular sidewall 221 abuts against the inner wall 1221 of the recess 122, and the end of the annular sidewall 221 away from the body 21 forms an opening. The side of the annular sidewall 221 with the opening can undergo slight deformation, so that the annular sidewall 221 expands radially to make an interference fit with the inner wall 1221 of the recess 122.

[0110] In some embodiments of this application, the body 21 is provided with a through hole 213, and one end of the annular sidewall 221 is connected to the hole wall 2131 of the through hole 213.

[0111] Specifically, the through hole 213 penetrates the body 21 along the third direction Z. One end of the annular sidewall 221 can be connected to the second surface 212 of the body 21 or to the hole wall 2131 of the through hole 213. The central axis of the through hole 213 and the central axis of the annular sidewall 221 can be coincident or eccentric. The shape of the through hole 213 matches the shape of the annular sidewall 221. For example, when the annular sidewall 221 is a circular sidewall, the through hole 213 is a circular hole; when the annular sidewall 221 is an elliptical sidewall, the through hole 213 is an elliptical hole.

[0112] Based on the aforementioned implementation method of "the busbar component 20 is formed by stamping process", one end of the annular sidewall 221 is connected to the hole wall 2131 of the through hole 213. An external tooling can be used to sequentially penetrate the through hole 213 and the annular sidewall 221 to open the annular sidewall 221, so that the annular outer peripheral surface 2211 of the annular sidewall 221 is interference-fitted with the inner wall 1221 of the recess 122.

[0113] In the above scheme, the body 21 is provided with a through hole 213 that communicates with one end of the annular sidewall 221, which facilitates the processing and forming of the annular sidewall 221 and enables the interference fit between the annular outer peripheral surface 2211 of the annular sidewall 221 and the inner wall 1221 of the recess 122.

[0114] Figure 9 The diagram shown is a structural schematic of a second type of busbar component in a battery according to some embodiments of this application; Figure 10 What is shown is Figure 9 A partial structural schematic diagram of the protrusion of the busbar component is shown in the figure;

[0115] like Figure 8 , Figure 9 and Figure 10 As shown, in some embodiments of this application, the annular sidewall 221 includes a plurality of sub-sidewalls 222, which are spaced apart circumferentially along the through hole 213.

[0116] Each sub-sidewall 222 includes a sub-outer peripheral surface 2221 and a sub-inner peripheral surface 2222. The sub-outer peripheral surface 2221 is used to abut against the inner wall 1221 of the recess 122. Multiple sub-sidewalls 222 together enclose to form an annular sidewall 221. The sub-outer peripheral surfaces 2221 of multiple sub-sidewalls 222 together circumferentially abut against the inner wall 1221 of the recess 122. The sub-inner peripheral surfaces 2222 of multiple sub-sidewalls 222 together enclose to form the internal space of the annular sidewall 221.

[0117] The multiple sub-sidewalls 222 can have the same shape and be evenly spaced circumferentially. For example, based on the aforementioned embodiment where "the annular sidewall 221 is a circular sidewall," the number of sub-sidewalls 222 is six, all six having the same shape, and together forming a circular annular sidewall 221. The multiple sub-sidewalls 222 can also have different shapes to facilitate the processing and shaping of the annular sidewall 221. For example, based on the aforementioned embodiment where "the annular sidewall 221 is an elliptical sidewall," the number of sub-sidewalls 222 is four, where two sub-sidewalls 222 correspond to the two sides along the major axis of the elliptical annular sidewall 221, and the other two sub-sidewalls 222 correspond to the two sides along the minor axis of the elliptical annular sidewall 221.

[0118] Along the third direction Z, the two sides of the sub-sidewall 222 are a first side 2223 and a second side 2224, respectively. The first side 2223 is connected to the main body 21, and the second side 2224 extends in a direction away from the main body 21. The first side 2223 and the second side 2224 of the sub-sidewall 222 can have the same thickness, and the thickness of the sub-sidewall 222 can also gradually decrease from the first side 2223 to the second side; the first side 2223 and the second side 2224 of the sub-sidewall 222 can have the same width, and the width of the sub-sidewall 222 can also gradually decrease from the first side 2223 to the second side 2224.

[0119] There are several ways to achieve an interference fit between the outer peripheral surface 2221 of the sub-sidewall 222 and the inner wall 1221 of the recess 122. For example, multiple sub-sidewalls 222 can be opened by external tooling, so that the outer peripheral surface 2221 of the sub-sidewall 222 abuts against the inner wall 1221 of the recess 122; or, for another example, multiple sub-sidewalls 222 can be opened by providing the following expansion member 30, which remains inside the annular sidewall 221 to maintain the interference fit between the outer peripheral surface 2221 of the sub-sidewall 222 and the inner wall 1221 of the recess 122.

[0120] In the above scheme, there is a gap between two adjacent sub-sidewalls 222. The outer diameter of the annular sidewall 221 can be changed by radially expanding outward or contracting inward, so that the annular sidewall 221 can be inserted into the recess 122 even when there is a dimensional deviation in the inner diameter of the recess 122, thus having good tolerance.

[0121] Figure 11 The diagram shown is a structural schematic of the second type of busbar component and the support member cooperating in a battery according to some embodiments of this application; Figure 12 What is shown is Figure 11 EE cross-section diagram; Figure 13 What is shown is Figure 12 A magnified view of a section at point F.

[0122] like Figure 10 , Figure 11 , Figure 12 and Figure 13 As shown, in some embodiments of this application, the battery 100 further includes a tensioning member 30, which is disposed inside the annular sidewall 221, and the outer peripheral surface of the tensioning member 30 is a conical surface; a driving member is used to drive the tensioning member 30 to move along the thickness direction of the body 21 to expand the plurality of sub-sidewalls 222 so that the plurality of sub-sidewalls 222 form an interference fit with the recess 122.

[0123] The expansion member 30 refers to a component that can act on the inner peripheral surface 2222 of each sub-sidewall 222, push the sub-sidewall 222 to move radially outward, so that the outer peripheral surface 2221 of the sub-sidewall 222 fits against the inner wall 1221 of the recess 122, thereby achieving an interference fit between the multiple sub-sidewalls 222 and the recess 122.

[0124] The expansion member 30 is disposed inside the annular sidewall 221. Along the third direction Z, the expansion member 30 includes a first end 31 and a second end 32 disposed opposite to each other. The first end 31 is disposed close to the body 21 and is disposed on the same side as the first side 2223 of the sub-sidewall 222. The second end 32 extends in a direction away from the body 21 and is disposed on the same side as the second side of the sub-sidewall 222.

[0125] The outer peripheral surface of the expansion member 30 refers to the surface of the expansion member 30 that extends in the Z-direction around a third party. The outer peripheral surface of the expansion member 30 is a conical outer peripheral surface 33, that is, the diameter of the expansion member 30 gradually increases or decreases along the direction from the first end 31 to the second end 32. Based on the aforementioned embodiment where "the annular sidewall 221 is a circular annular sidewall", the expansion member 30 is a cone extending in the Z-direction along the axial direction.

[0126] The tensioning member 30 can slide and engage with the body 21 along the third direction Z to ensure that the tensioning member 30 can only move along the third direction Z; the tensioning member 30 can also slide relative to the body 21 in any direction, and the direction of the force applied to the tensioning member 30 by the driving member controls the movement of the tensioning member 30 along the third direction Z.

[0127] The conical outer peripheral surface 33 abuts against the annular inner peripheral surface 2212 of the annular sidewall 221, that is, it abuts against the sub-inner peripheral surface 2222 of each sub-sidewall 222. The annular inner peripheral surface 2212 of the annular sidewall 221 can be a conical surface that matches the shape of the conical outer peripheral surface 33; the annular inner peripheral surface 2212 of the annular sidewall 221 can also be an annular surface with a constant diameter variation.

[0128] The driving component can drive the expansion member 30 to move in one direction (Z) and expand multiple sub-sidewalls 222 to achieve an interference fit between the annular sidewall 221 and the recess 122. The driving component can also drive the expansion member 30 to move in another direction (Z) and release multiple sub-sidewalls 222, allowing the annular sidewall 221 and the recess 122 to slide freely in the Z direction, facilitating the disassembly of the busbar component 20 and the battery cell 10.

[0129] After the drive component moves the tensioning component 30 into place, the drive component can maintain the state of being installed as an integral part with the tensioning component 30. This can fix the position of the tensioning component 30, maintain the interference fit between the annular sidewall 221 and the recess 122, and also drive the tensioning component 30 to release multiple sub-sidewalls 222 when it is necessary to disassemble the busbar component 20 and the battery cell 10.

[0130] There are various ways in which the driving component and the tensioning component 30 can cooperate. For example, the driving component and the tensioning component 30 can form a nut and screw mechanism, with the driving component rotating around a third direction Z and supported on the body 21. The driving component and the tensioning component 30 are threaded together, and the driving component drives the tensioning component 30 to achieve linear motion by rotation. Alternatively, the driving component can be other types of linear driving components, such as cylinders or push rods. In other embodiments, a driving component may not be provided; instead, a handheld part can be provided on the tensioning component 30 for easy hand-held force application, and the tensioning component 30 can be moved directly by acting on the handheld part.

[0131] In the above scheme, the expansion member 30 is used to open up multiple sub-side walls 222, so that multiple sub-side walls 222 and recess 122 form an interference fit. The outer peripheral surface of the sub-side wall 222 and the inner wall 1221 of the recess 122 have a large contact area, which not only improves the current carrying capacity at the connection between the busbar component 20 and the electrode terminal 12, but also enables the busbar component 20 and the electrode terminal 12 to be firmly connected.

[0132] In some embodiments of this application, the inner circumferential surface of the annular sidewall 221 is a conical surface that matches the outer circumferential surface of the expansion member 30.

[0133] Specifically, the inner annular surface 2212 of the annular sidewall 221 matches the outer conical surface 33 of the expansion member 30. Matching the inner annular surface 2212 and the outer conical surface 33 means that, without the expansion member 30 expanding the multiple sub-sidewalls 222, the inner annular surface 2212 and the outer conical surface 33 exhibit the same trend of change along the third direction Z. For example, if the diameter of the expansion member 30 gradually increases along the direction from the first end 31 to the second end 32, the diameter of the inner annular surface 2212 also gradually increases along the direction away from the body 21.

[0134] In the above scheme, the inner circumferential surface abuts against the outer circumferential surface of the expansion member 30 and matches its shape. There is no gap between the inner circumferential surface of the annular sidewall 221 and the outer circumferential surface of the expansion member 30, thereby pressing the annular sidewall 221 against the inner wall 1221 of the recess 122 and improving the current flow capacity at the connection between the busbar 20 and the electrode terminal 12.

[0135] Figure 14 What is shown is Figure 11 The diagram shows a structural schematic of the support structure in the battery.

[0136] like Figure 13 and Figure 14 As shown, in some embodiments of this application, a first limiting protrusion 35 is provided on the outer peripheral surface of the tensioning member 30. The first limiting protrusion 35 is configured to be inserted into the gap between two adjacent sub-sidewalls 222 to prevent the tensioning member 30 from rotating relative to the sub-sidewalls 222.

[0137] Specifically, there is a first gap 2225 between two adjacent sub-sidewalls 222, and a first limiting protrusion 35 protrudes from the tapered outer peripheral surface 33 of the tensioning member 30 and is inserted into the first gap 2225. Along the Z-direction around the third, the width of the first gap 2225 matches the width of the first limiting protrusion 35.

[0138] One first limiting protrusion 35 can be provided, which is inserted into one of the multiple first gaps 2225 to prevent the tensioning member 30 from rotating around its central axis. Multiple first limiting protrusions 35 can be provided, with the number and position of the multiple first limiting protrusions 35 corresponding to the number of first gaps 2225. Each first limiting protrusion 35 is provided in its corresponding first gap 2225, and together they prevent the tensioning member 30 from rotating around its central axis.

[0139] Along the third direction Z, the two ends of the first limiting protrusion 35 can extend to the first end 31 and the second end 32 of the tensioning member 30, respectively, and the two ends of the first limiting protrusion 35 can also be limited to the conical outer peripheral surface 33.

[0140] In the above scheme, the first limiting protrusion 35 is inserted between two adjacent sub-side walls 222, so that the expansion member 30 can only move along the thickness direction of the body 21. Since the gap between the two adjacent sub-side walls 222 is used to limit the movement direction of the expansion member 30, no additional parts are added, which simplifies the construction and assembly process of the battery 100.

[0141] like Figure 13 and Figure 14 As shown, in some embodiments of this application, the expansion member 30 is provided with a threaded hole 34, which extends along the thickness direction of the body 21. The driving member is a threaded member, which cooperates with the threaded hole 34 so that when the threaded member rotates, it can drive the expansion member 30 to move along the thickness direction of the body 21.

[0142] Specifically, the central axis of the threaded hole 34 coincides with the central axis of the tapered expansion member 30, and the threaded hole 34 is threadedly engaged with the threaded member. The threaded hole 34 can penetrate the expansion member 30 in a third direction Z, or the threaded hole 34 can have an opening only at the first end 31.

[0143] The threaded component includes a head 41 and a shank 42. The shank 42 is used to thread into the threaded hole 34. The head 41 of the threaded component can abut against the second surface 212 of the body 21 in a third direction Z, so that the threaded component is rotatably supported on the body 21. The threaded component and the tightening member 30 form a nut screw mechanism. Alternatively, the bottom end of the shank 42 of the threaded component can abut against the bottom wall 1222 of the recess 122 (e.g., Figure 5 (as shown), so that the threaded part can be rotated and supported on the body 21.

[0144] In the above scheme, when the threaded part rotates, it can drive the expansion member 30 to move along the thickness direction of the body 21, thereby opening up multiple sub-side walls 222. The structure is simple and easy to implement.

[0145] like Figure 13 As shown, in some embodiments of this application, a groove 214 is provided on the second surface 212, the groove 214 is arranged around the through hole 213, and the groove 214 is used to accommodate the head 41 of the threaded part.

[0146] The groove 214 is formed by the recess of the second surface 212 of the body 21. In the XY plane, the profile of the groove 214 can match or be larger than the profile of the head 41 of the threaded part to accommodate the head 41 of the threaded part. Along the third direction Z, the depth of the groove 214 can be less than or greater than the height of the head 41 of the threaded part.

[0147] In the above scheme, the sink 214 can accommodate the head 41 of the threaded part, reduce the height of the head 41 of the threaded part protruding from the second surface 212 of the busbar component 20, make the battery 100 structure compact, and the sink 214 can support the head 41 of the threaded part, so that the position of the threaded part along its axial direction remains unchanged when it rotates, so as to effectively drive the expansion member 30 to move along the thickness direction of the body 21.

[0148] In some embodiments of this application, along the thickness direction of the body 21, the outer diameter of the end of the expansion member 30 near the body 21 is smaller than the outer diameter of the end away from the body 21, and the driving member is used to drive the expansion member 30 to move in the direction closer to the body 21 to open up the plurality of sub-sidewalls 222.

[0149] like Figure 14 As shown, specifically, the outer diameter of the first end 31 of the tensioning member 30 is smaller than the outer diameter of the second end 32. The driving member drives the tensioning member 30 to move along the third direction Z towards the body 21. During the movement, the second end 32 of the tensioning member 30 moves towards the body 21 and expands multiple sub-side walls 222.

[0150] In the above scheme, the expansion member 30 can be inserted into the interior of the annular sidewall 221 from the end of the annular sidewall 221 away from the body 21, and the threaded member extends into the through hole 213 from one side of the second surface 212 of the body 21 and is threadedly engaged with the expansion member 30, so that the body 21, the threaded member and the expansion member 30 form a pre-assembled assembly, which simplifies the assembly process of the busbar component 20 and the battery cell 10.

[0151] In other embodiments, the outer diameter of the first end 31 of the expansion member 30 is larger than the outer diameter of the second end 32. The driving member drives the expansion member 30 to move in a direction away from the body 21 along the third direction Z. During the movement, the second end 32 of the expansion member 30 moves in a direction away from the body 21 and expands multiple sub-sidewalls 222.

[0152] Figure 15 The diagram shown is a schematic diagram of the structure in some embodiments of this application, in which the convex and concave parts are engaged by a second limiting protrusion and a limiting groove.

[0153] like Figure 15 As shown, in some embodiments of this application, a second limiting protrusion 223 is provided on the outer peripheral surface of the protrusion 22, and a limiting groove 1223 is provided on the inner peripheral surface of the recess 122. The second limiting protrusion 223 and the limiting groove 1223 are engaged to restrict the protrusion 22 and the recess 122 from separating along the thickness direction of the body 21.

[0154] The second limiting protrusion 223 can be a circumferentially extending annular flange of the annular sidewall 221, or it can be a protrusion structure protruding from the outer peripheral surface of the annular sidewall 221. The second limiting protrusion 223 can be disposed at the end edge of the annular sidewall 221 opposite to the body 21, or it can be disposed in the middle of the annular sidewall 221. Based on the aforementioned embodiment where "the second limiting protrusion 223 is an annular flange", multiple second limiting protrusions 223 can be provided along the third direction Z. The second limiting protrusion 223 can be formed by stamping, or it can be formed by directly protruding outward from the surface of the annular outer peripheral surface 2211 or the sub-outer peripheral surface 2221.

[0155] The shape, number and position of the limiting groove 1223 match the second limiting protrusion 223. The limiting groove 1223 can be formed by rotary milling or by stamping.

[0156] In the above scheme, the second limiting protrusion 223 engages with the limiting groove 1223, which can prevent the protrusion 22 and the recess 122 from separating along the thickness direction of the body 21, so that the busbar component 20 is firmly connected to the battery 100 terminal.

[0157] In some embodiments of this application, the second limiting protrusion 223 is disposed at the end of the protrusion 22 away from the body 21.

[0158] The second limiting protrusion 223 can be formed after the interference fit between the protrusion 22 and the recess 122. The hardness of the protrusion 22 is less than that of the electrode terminal 12. The end of the protrusion 22 extends outward and fills the limiting groove 1223 to form the second limiting protrusion.

[0159] In the above scheme, the second limiting protrusion 223 can be formed by using the edge of the protrusion 22 away from the body 21, so that the second limiting protrusion 223 is easy to form, and the limiting groove 1223 can be located at the bottom of the recess 122, making it easy to process and form the limiting groove.

[0160] In some embodiments of this application, the battery 100 also includes a sampling terminal (not shown in the figure), which is integrally formed with the bus component 20.

[0161] By separating the busbar component 20 from the battery cell 10, the entire temperature acquisition system can be separated from the battery cell 10 without damaging the structure of the temperature acquisition system, making it easy to recycle the temperature acquisition system.

[0162] In the above scheme, the sampling terminal and the busbar component 20 are integrally formed, which can reduce the number of components inside the battery 100 and simplify the structure of the battery 100.

[0163] Some embodiments of this application provide an electrical device, including a battery 100 according to some embodiments of this application, the battery 100 being used to provide electrical energy.

[0164] Due to the characteristics of the battery 100 in some embodiments of this application, the battery 100 of the power-consuming device in some embodiments of this application has a low replacement cost.

[0165] Figure 16 The diagram shown illustrates a battery manufacturing method according to some embodiments of this application.

[0166] like Figure 16 As shown, some embodiments of this application propose a method for manufacturing a battery, including:

[0167] S100: Provide a battery cell 10, the battery cell 10 including an electrode terminal 12, and a recess 122 is provided on the end face 121 of the electrode terminal 12;

[0168] S200: A busbar component 20 is provided, the busbar component 20 including a body 21 and a protrusion 22, the body 21 having a first surface 211 and a second surface 212 disposed opposite to each other in its thickness direction, and the protrusion 22 protruding from the first surface 211;

[0169] S300: The protrusion 22 is inserted into the recess 122 and is press-fitted with the recess 122 to achieve electrical connection between the busbar 20 and the battery cell 10.

[0170] Figure 17 The diagram shown is a schematic of a battery manufacturing apparatus according to some embodiments of this application.

[0171] like Figure 17 As shown, some embodiments of this application disclose a battery manufacturing apparatus 2000, comprising:

[0172] A first providing device 2100 is used to provide a battery cell 10, the battery cell 10 including an electrode terminal 12, and a recess 122 is provided on the end face 121 of the electrode terminal 12.

[0173] A second providing device 2200 is used to provide a confluence component 20, the confluence component 20 including a body 21 and a protrusion 22, the body 21 having a first surface 211 and a second surface 212 disposed opposite to each other in its thickness direction, and the protrusion 22 protruding from the first surface 211.

[0174] Assembly module 2300 is used to insert the protrusion 22 into the recess 122 and to make an interference fit with the recess 122, so as to realize the electrical connection between the busbar component 20 and the battery cell 10.

[0175] like Figures 1 to 8 as well as Figure 15 As shown, some embodiments of this application propose a battery 100, including a battery cell 10 and a current collector 20. The battery cell 10 includes two electrode terminals 12, and the current collector 20 includes a body 21 and two protrusions 22, which are respectively connected to the two electrode terminals 12. The end face 121 of the electrode terminal 12 has a recess 122, and the protrusion 22 is inserted into the recess 122 and has an interference fit with it, thus achieving both electrical connection and fixed connection between the current collector 20 and the electrode terminal 12. The body 21 includes a through hole 213, and the protrusion 22 includes an annular sidewall 221, which surrounds the through hole 213. The inner wall 1221 of the recess 122 is provided with an annular limiting groove 1223. An external tool is inserted into the through hole 213 of the protrusion 22. The end of the tool has an annular flange. The tool opens the annular sidewall 221 so that the outer peripheral surface of the annular sidewall 221 is press-fitted with the recess 122. At the same time, the end of the protrusion 22 deforms and fills the limiting groove 1223 to form a second limiting protrusion 223. The second limiting protrusion 223 is engaged with the limiting groove 1223 to prevent the bus component 20 from separating from the electrode terminal 12.

[0176] like Figures 8 to 10As shown, the annular sidewall 221 may also include multiple sub-sidewalls 222. The multiple sub-sidewalls 222 are circumferentially spaced around the through hole 213 to form several petal-like structures. The multiple sub-sidewalls 222 may be circumferentially spaced evenly or unevenly. An external tooling is inserted into the through hole 213, and the tooling expands the multiple sub-sidewalls 222 to make the outer peripheral surface of the sub-sidewalls 222 press-fit with the recess 122.

[0177] Based on the above-described structure of battery 100, the assembly process of battery 100 is as follows:

[0178] Place the busbar component 20 on the surface of the battery cell 10, so that the protrusion 22 aligns with the recess 122;

[0179] Using a certain speed and pressure, the tooling is inserted into the through hole 213 and the annular sidewall 221, and the annular sidewall 221 or multiple sub-sidewalls 222 are opened to achieve an interference fit between the protrusion 22 and the concave part 122.

[0180] The edge of the protrusion 22 fills the limiting groove of the recess 122 to form a snap-fit ​​structure, preventing the busbar component 20 from separating from the battery cell 10.

[0181] When it is necessary to disassemble the battery 100, an external force is applied to pry the body 21 of the current collector 20, which can pull the protrusion 22 out of the recess 122, thus achieving the non-destructive separation of the current collector 20 from the battery cell 10.

[0182] like Figures 11 to 15 As shown, based on the above-described embodiment where "the annular sidewall 221 includes multiple sub-sidewalls 222", the battery 100 further includes a clamping member 30 and a driving member 40. The clamping member 30 is disposed inside the annular sidewall 221. The clamping member 30 is a cone with a threaded hole 34. A first limiting protrusion 35 is formed on the outer circumferential surface of the clamping member 30. The first limiting protrusion 35 is inserted into the gap between two adjacent sub-sidewalls 222, serving as a key structure to prevent the clamping member 30 from rotating circumferentially. The driving member 40 is a threaded member. The driving member 40 is rotatably supported on the second surface 212 of the body 21 and inserted into the threaded hole 34. The driving member 40 rotates to drive the clamping member 30 to move along the thickness direction of the body 21, thereby opening the multiple sub-sidewalls 222 and achieving an interference fit between the sub-sidewalls 222 and the recess 122. The outer diameter of the first end 31 of the tensioning member 30 is smaller than the outer diameter of the second end 32, and the multiple sub-side walls 222 are opened by moving upward (moving towards the body 21).

[0183] Based on the above-described structure of battery 100, the assembly process of battery 100 is as follows:

[0184] The expansion member 30 is inserted into the interior of the annular sidewall 221 from one side of the first surface 211 of the body 21, and the driving member 40 is inserted into the through hole 213 and the threaded hole 34 from one side of the second surface 212 of the body 21. The head 41 of the driving member 40 is rotated and supported on the groove 214 of the body 21.

[0185] Use a screwdriver to tighten the drive component 40, so that the drive component 40, the expansion component 30 and the bus component 20 are pre-assembled into one unit to form a bus component assembly;

[0186] Place the combiner assembly above the battery cell 10, so that the protrusion 22 is inserted into the recess 122.

[0187] Continue to tighten the drive component 40 with a screwdriver, and the expansion component 30 moves upward to open up the multiple sub-side walls 222, so as to achieve an interference fit between the sub-side walls 222 and the recess 122.

[0188] When it is necessary to disassemble the battery 100, use a screwdriver to turn the drive component 40 in the opposite direction. The tensioning component 30 moves downward and releases multiple sub-side walls 222, which can pull the protrusion 22 out of the recess 122, thus achieving non-destructive separation of the busbar component 20 from the battery cell 10.

[0189] In the battery 100 of this embodiment, the current collector 20 has a protrusion 22, and the electrode terminal 12 of the battery cell 10 has a recess 122. The protrusion 22 is inserted into the recess 122, and the inner wall 1221 of the recess 122 achieves both electrical and mechanical connection with the current collector 20. This not only gives the connection between the current collector 20 and the electrode terminal 12 a large current-carrying capacity, but also facilitates the assembly and disassembly of both, making the battery 100 easier to recycle. Furthermore, when the end of the temperature acquisition system is directly designed as the current collector 20, separating the current collector 20 from the battery cell 10 allows the entire temperature acquisition system to be disassembled without damaging its integrity, facilitating the secondary recycling of the temperature acquisition system.

[0190] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0191] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery, characterized by, The battery comprises: a battery cell comprising an electrode terminal, an end surface of the electrode terminal being provided with a recess; a busbar component comprising a body and a protrusion, the body having a first surface and a second surface oppositely arranged in a thickness direction of the body, the protrusion protruding from the first surface, the protrusion being configured to be inserted into the recess and to be in interference fit with the recess to achieve electrical connection between the busbar component and the battery cell; the recess has an annular inner wall, the protrusion comprises an annular side wall, a central axis of the annular side wall extending in the thickness direction of the body, the annular side wall being configured to abut against the annular inner wall; one end of the annular side wall is connected to the body, and the other end of the annular side wall is configured to form an opening, the protrusion being configured to deform the side of the annular side wall having the opening, and the annular side wall is configured to radially expand to be in interference fit with the annular inner wall.

2. The battery of claim 1, wherein, The body is provided with a through hole, and one end of the annular side wall is connected to a hole wall of the through hole.

3. The battery of claim 2, wherein, The annular side wall comprises a plurality of sub-side walls, and the plurality of sub-side walls are arranged at intervals in a circumferential direction of the through hole.

4. The battery of claim 3, wherein, The battery further comprises: a bulging member arranged inside the annular side wall, an outer peripheral surface of the bulging member being a tapered surface; a driving member configured to drive the bulging member to move in the thickness direction of the body to separate the plurality of sub-side walls and to form interference fit between the plurality of sub-side walls and the recess.

5. The battery of claim 4, wherein, An inner peripheral surface of the annular side wall is a tapered surface matching the outer peripheral surface of the bulging member.

6. The battery of claim 4, wherein, The outer peripheral surface of the bulging member is provided with a first limiting protrusion configured to be inserted into a gap between two adjacent sub-side walls to prevent the bulging member from rotating relative to the sub-side walls.

7. The battery of claim 4, wherein, The bulging member is provided with a threaded hole extending in the thickness direction of the body, and the driving member is a threaded member configured to cooperate with the threaded hole to drive the bulging member to move in the thickness direction of the body when the threaded member rotates.

8. The battery of claim 7, wherein, The second surface is provided with a sink groove arranged around the through hole, and the sink groove is configured to accommodate a head of the threaded member.

9. The battery of claim 4, wherein, In the thickness direction of the body, an outer diameter of one end of the bulging member close to the body is smaller than an outer diameter of the other end of the bulging member away from the body, and the driving member is configured to drive the bulging member to move towards the body to separate the plurality of sub-side walls.

10. The battery according to any one of claims 1 to 9, characterized in that, An outer peripheral surface of the protrusion is provided with a second limiting protrusion, and an inner peripheral surface of the recess is provided with a limiting groove, the second limiting protrusion being configured to be in snap fit with the limiting groove to limit the protrusion and the recess from being separated in the thickness direction of the body.

11. The battery of claim 10, wherein, The second limiting protrusion is arranged at the other end of the protrusion away from the body.

12. The battery of any one of claims 1-9, wherein, The battery further comprises a sampling terminal, and the sampling terminal is integrally formed with the busbar component.

13. An electrical device, comprising: The battery comprises the battery cell according to any one of claims 1-12, and the battery is configured to provide electric energy.

14. A method of manufacturing a battery for manufacturing a battery as claimed in any one of claims 1-12, characterized in that The battery comprises: a battery cell comprising an electrode terminal, an end surface of the electrode terminal being provided with a recess; Provided is a busbar member including a body having a first surface and a second surface disposed opposite each other in a thickness direction of the body, and a protrusion protruding from the first surface; The protrusion is inserted into the recess and is in interference fit with the recess to achieve electrical connection of the busbar member with the battery cell.

15. An apparatus for manufacturing a battery as claimed in any one of claims 1 to 12, characterized in that Comprise: A first providing device for providing a battery cell including an electrode terminal having a recess provided on an end surface thereof; A second providing device for providing a busbar member including a body having a first surface and a second surface disposed opposite each other in a thickness direction of the body, and a protrusion protruding from the first surface; An assembling module for inserting the protrusion into the recess and in interference fit with the recess to achieve electrical connection of the busbar member with the battery cell.

Images