Battery and manufacturing method thereof, and power consumption device

Abstract

The present application provides a battery, a manufacturing method thereof, and a power consumption device. The battery includes a sampling device and at least two battery cells arranged in a first direction, and poles are installed at the ends of the battery cells, and the extension direction of the poles protruding from the ends of the battery cells is perpendicular to the first direction. The sampling device includes a sampling member having a sampling signal line built therein, and at least two mounting parts are formed on the sampling member, and the mounting parts conform to the side shapes of the poles so that the mounting parts are closely attached to the poles of the corresponding battery cells, and the sampling device further includes a connection part for electrically connecting the mounting parts and the poles, which is connected to the sampling signal line. After the sampling device and the battery cells are assembled, the sampling device can be prevented from protruding from the surface of the battery cells, so that the extra space between the battery cells can be fully utilized and the space occupied by the sampling device in the battery can be reduced, which is advantageous for further increasing the energy density of the battery.

Description

[Technical Field]

[0001] The present application relates to the field of power batteries, and in particular to batteries and methods for manufacturing the same, and power consuming devices. [Background technology]

[0002] This section provides only background information related to the present application and is not necessarily prior art.

[0003] With the continuous improvement of battery technology and market advancements, high-energy density batteries are widely applied in many fields, such as electric vehicles and ships. To ensure the normal use of batteries, it is necessary to monitor the operating status of battery cells in the battery. To achieve this monitoring, a sampling device is usually installed in the battery, which can measure the operating parameters of the battery cells, such as voltage, current, temperature, etc., in real time. The sampling device in the related art occupies a relatively large amount of space, limiting further improvement of battery energy density. Summary of the Invention

[0004] The purpose of the present application is to provide a battery, a manufacturing method thereof, and a power consuming device, which are advantageous for improving the energy density of the battery while realizing monitoring of the operating parameters of the battery cell. An embodiment according to a first aspect of the present application provides a battery including a sampling device and at least two battery cells arranged in a first direction, wherein poles are installed at the ends of the battery cells, and the extension direction of the poles protruding from the ends of the battery cells is perpendicular to the first direction, the sampling device includes a sampling member having a sampling signal line built therein, and at least two mounting portions are formed on the sampling member, and the mounting portions conform to the side shapes of the poles so that the mounting portions are in close contact with the poles of the corresponding battery cells, and the sampling device further includes a connecting portion connected to the sampling signal line for electrically connecting the mounting portions to the poles.

[0005] In the battery according to the embodiment of the present application, the sampling member of the sampling device has at least two mounting portions formed thereon, the mounting portions conforming to the side shapes of the poles of the corresponding battery cells so as to be in close contact with the poles, and the connecting portions are used to electrically connect the mounting portions to the poles of the battery cells, thereby enabling further collection of electrical signals. After the sampling device and the battery cells are assembled, the sampling device does not protrude from the surface of the battery cells, making full use of the extra space between the battery cells and reducing the space occupied by the sampling device within the battery, which is advantageous for further increasing the energy density of the battery.

[0006] In some embodiments, the pole is cylindrical, the mounting portion is arc-shaped, and the arc-shaped mounting portion is tightly attached to the cylindrical pole. The pole has a cylindrical structure, the mounting portion is arc-shaped to fit the shape of the pole, and the inner diameter of the mounting portion corresponds to the outer diameter of the pole, so that the mounting portion is tightly attached to the pole, reducing the space occupied by the energy region of the battery and facilitating an increase in the energy density of the battery.

[0007] In some embodiments, the sampling device further includes a double-sided tape, one side of which is attached to the mounting portion and the other side of which is attached to the pole. Fixing the sampling device to the pole of the battery with double-sided tape has low material costs, is light in weight, and is small in volume, so it does not occupy the energy region of the battery and is easy to operate during battery assembly.

[0008] In some embodiments, there are two pieces of double-sided tape corresponding to each mounting portion, and the connecting portion is located between the two pieces of double-sided tape, which are installed on both sides of the connecting portion, so that the connecting portion and the pole can be better attached and fixed during assembly.

[0009] In some embodiments, the double-sided tape is a foam double-sided tape. The foam double-sided tape has the advantages of strong adhesion, excellent holding power, and strong heat resistance, making it suitable for the internal temperature environment of a battery. In addition, the foam double-sided tape has good elasticity, so it can accommodate dimensional tolerances between the mounting part and the pole during assembly.

[0010] In some embodiments, the connection portion is a bonding pad for welding the mounting portion to the electrode post. Welding the mounting portion to the electrode post by the bonding pad has the effect of strengthening the connection, while the bonding pad serves to electrically connect the sampling device to the electrode post.

[0011] In some embodiments, the size of the bonding pad in the second direction is smaller than the size of the mounting portion in the second direction, and the second direction is perpendicular to the first direction. Because the mounting portion is larger than the bonding pad in the second direction, the bonding pad can avoid accidentally contacting the end cover of the battery during the mounting process, avoiding external short-circuiting of the battery cell and reducing safety risks.

[0012] In some embodiments, the sampling member is a flexible circuit board that can be formed in-situ to the size of the battery pole and pressed down and attached manually or with tooling to better conform to the shape of the pole.

[0013] In some embodiments, the sampling device further includes a thermistor, and the thermistor is connected to the bonding pad by a thermally conductive structural adhesive. The thermistor is connected to the bonding pad, and the distance between the thermistor and the pole is closer, which prevents excessive energy loss during heat conduction and makes temperature sampling more accurate.

[0014] In some embodiments, the sampling device further includes a connector, the battery further includes a battery management system, and the connector is used to connect to the battery management system so as to transmit the sampling signal collected by the sampling device to the battery management system. One end of the connector is connected to the sampling member, and the other end is connected to the battery management system so as to transmit the electrical signal collected by the sampling member to the battery management system.

[0015] In some embodiments, the battery cells are distributed in multiple rows, each row including at least two battery cells connected along at least the second direction, and each battery cell in each row is connected in series. The number of sampling devices is multiple, and the number of battery cells included in each row is equal to the number of sampling devices. The series connection of the battery cells can increase the battery voltage, and the battery cells are connected in series to the battery cells via poles, and a sampling device is installed between the battery cells to sample each battery cell.

[0016] An embodiment of a second aspect of the present application provides a method for manufacturing a battery, the method including: providing at least two battery cells arranged in a first direction, with poles installed at ends of the battery cells; and providing a sampling device, the sampling device including a sampling member having a sampling signal line built therein, with at least two mounting portions formed on the sampling member, the mounting portions conforming to a side shape of the pole so as to be in close contact with the pole, the sampling device further including bonding pads connected to the sampling signal line, the bonding pads installed on the mounting portions and welded to the pole.

[0017] In a battery manufactured by the battery manufacturing method according to the embodiment of the present application, at least two mounting portions are formed on the sampling member of the sampling device, and the mounting portions are adapted to the side shapes of the poles of the corresponding battery cells so as to be in close contact with the poles, and the connecting portions are used to electrically connect the mounting portions to the poles of the battery cells, thereby enabling further collection of electrical signals. After the sampling device and the battery cells are assembled, the sampling device does not protrude from the surface of the battery cells, making full use of the extra space between the battery cells and reducing the space occupied by the sampling device within the battery, which is advantageous for further increasing the energy density of the battery.

[0018] An embodiment of a third aspect of the present application provides a power consumption device, the power consumption device including a battery according to any one of the embodiments of the first aspect, wherein the battery is used to provide electrical energy to a power consumption device.

[0019] In the battery applied to the power consumption device according to the embodiment of the present application, the sampling member of the sampling device has at least two mounting portions formed thereon, the mounting portions conforming to the side shapes of the poles of the corresponding battery cells so as to be in close contact with the poles, and the connecting portions are used to electrically connect the mounting portions to the poles of the battery cells, thereby further collecting electrical signals. After the sampling device and the battery cells are assembled, the sampling device does not protrude from the surface of the battery cells, making full use of the extra space between the battery cells and reducing the space occupied by the sampling device within the battery, which is advantageous for further increasing the energy density of the battery.

[0020] The above description is merely an outline of the technical solution of the present application. In order to make the technical solution of the present application more clearly understood and implemented according to the content of the specification, and to make the above and other objectives, features and advantages of the present application more obvious and understandable, specific embodiments of the present application are given below. [Brief explanation of the drawings]

[0021] In order to more clearly describe the embodiments of the present invention or the technical solutions in the prior art, the drawings necessary to be used in the description of the embodiments or the prior art will be briefly described below. However, the drawings in the following description are only some embodiments of the present invention, and it is obvious that those skilled in the art can further obtain other embodiments based on these drawings. In the drawings, [Figure 1] 1 is a structural schematic diagram of a vehicle using a battery according to an embodiment of the present application. [Figure 2] 1 is a structural schematic diagram of a battery according to some embodiments of the present application. [Figure 3] 1 is a schematic diagram of an assembled battery and sampling device according to some embodiments of the present application. [Figure 4] 1 is a structural schematic diagram of a sampling device according to some embodiments of the present application. [Figure 5] 1 is an exploded schematic view of a sampling device according to some embodiments of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0022] The following detailed description will be given of the embodiments of the technical solution of the present application in conjunction with the drawings. The following embodiments are for the purpose of more clearly explaining the technical solution of the present application, and are merely illustrative and do not limit the scope of protection of the present application.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art. The terms used herein are used only to describe specific embodiments and are not intended to limit the present application. The terms "comprises," "having," and any variations thereof in the specification and claims of this application and the description of the drawings above are intended to cover a non-exclusive "comprise."

[0024] In the description of the embodiments of the present application, the terms "first," "second," etc. are used only for the purpose of distinguishing different objects, and are not understood to express or suggest relative importance, or to imply the number, specific order, or primary-subordinate relationship of the indicated technical features. In the description of the embodiments of the present application, unless otherwise specified and specifically limited, "plurality" means two or more.

[0025] When referring to an "embodiment" in this specification, it means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of the phrase in various locations in the specification do not necessarily all refer to the same embodiment, nor are they mutually exclusive, independent, or alternative embodiments. Those skilled in the art can explicitly or implicitly understand that the embodiments described herein can be combined with other embodiments.

[0026] In the description of the embodiments of the present application, the term "and / or" merely describes the relationship between related objects and indicates that three relationships may exist. For example, A and / or B may represent three cases: A alone, a combination of A and B, and B alone. In addition, the character " / " in the text generally indicates that the related objects before and after it are in an "or" relationship.

[0027] In describing the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0028] In describing the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial direction," "radial direction," and "circumferential direction" are based on the orientations or positional relationships shown in the drawings and are intended to facilitate or simplify the description of the embodiments of the present application, and do not indicate or imply that the referred-to devices or elements need to have a specific orientation or be constructed and operated in a specific orientation, and should not be understood as limiting the embodiments of the present application.

[0029] In the description of the embodiments of the present application, unless otherwise clearly defined or limited, the technical terms "attached," "connected," "connected," "fixed," etc. should be understood in a broad sense, and may mean, for example, fixedly connected, detachably connected, or integrated, mechanically connected, electrically connected, directly connected, indirectly connected via an intermediate medium, internal communication between the two elements, or an interactive relationship between the two elements. Those skilled in the art will be able to understand the specific meanings of the above terms in the embodiments of the present application according to specific circumstances.

[0030] With the continuous improvement of battery technology and market advancements, high-energy density batteries are being widely applied in many fields, such as electric vehicles and ships. In actual applications, it is impossible for each battery cell to be completely identical. Because battery cells have slight differences in certain parameters (e.g., voltage, internal resistance, SOC (state of charge)), the differences between battery cells become increasingly significant as the battery is used for a long time. These differences can lead to poor consistency between battery cells, affecting the overall performance of the battery and potentially causing serious accidents such as fires and explosions due to lack of rational control, such as charge / discharge control and power balance control. Therefore, sampling devices are installed inside batteries to monitor battery cells, so that timely control and treatment can be carried out when abnormalities are detected.

[0031] Some sampling devices in the related art collect signals of some parameters of battery cells through electrical connection with the poles of the battery cells, and the collected signals are transmitted to a battery management system via a flexible flat cable (FFC) or a flexible circuit board (FPC), thereby adjusting and controlling the parameters of each battery cell.

[0032] The inventors have noticed that, as the demand for overall battery energy density increases, the technology of directly arranging battery cells within a battery casing is becoming increasingly widespread. This modularization technology eliminates the need for modular structures and the installation of crossbeam structures within the casing, allowing more battery cells to be arranged in a limited space, thereby increasing volumetric energy density. Two arrangements can be used for the battery cells within a battery casing. One is to have all the battery cell terminals facing outward, for example, on the top, bottom, or side of the battery, allowing various electrical connection or sampling processes for the battery cells at the outer edges of the battery. The other is to have some of the battery cell terminals located inside the battery, i.e., some battery cells are first electrically connected to each other to form a row, with the electrode terminals of adjacent battery cells in this row electrically connected opposite each other. Signal collection from electrode terminals located within the casing is difficult due to the limited internal space of the battery.

[0033] Some conventional sampling devices generally include a plastic bracket and a metal sampling ring, which are fastened to the pole of the electrode terminal by an interference fit and supported by the plastic bracket to collect and transmit electrical signals from the pole. However, such sampling devices occupy a relatively large amount of space, limiting further improvements in battery energy density. In addition, the metal sampling ring is difficult to install, has low installation efficiency, and is prone to misalignment during the installation process, which may result in an external short circuit when it is connected to the pole and the top cover of the battery cell.

[0034] Based on the above-mentioned problems with sampling devices for batteries, the inventors have researched a new sampling device, namely the sampling device of the present application, in which a mounting part that fits the side shape of the battery cell pole is installed on the sampling member, and then a connection part is used to electrically connect the mounting part and the pole, thereby eliminating structures such as complex support members, elastic metal sheets, or wiring harnesses. After assembly is complete, the sampling device does not protrude from the surface of the battery cell, making full use of the extra space between the battery cells and reducing the space occupied by the sampling device within the battery, which is advantageous for further increasing the energy density of the battery.

[0035] The batteries disclosed in the embodiments of the present application may be used in power-consuming devices such as, but not limited to, vehicles, ships, and aircraft. The power-consuming devices may be, but are not limited to, mobile phones, tablets, laptops, electric toys, electric appliances, battery-powered vehicles, electric vehicles, ships, spacecraft, etc. Here, the electric toys may include stationary or mobile electric toys, such as game consoles, electric car toys, electric steamship toys, and electric airplane toys, and the spacecraft may include airplanes, rockets, space shuttles, spacecraft, etc.

[0036] FIG. 1 shows a structural schematic diagram of a vehicle 1, which is an electric power consumer device, that uses a battery according to an embodiment of the present application. The vehicle 1 may be a fuel oil vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle, a range-extender vehicle, or the like. A motor 40, a controller 30, and a battery 10 may be installed inside the vehicle 1. The controller 30 controls the battery 10 to supply power to the motor 40. For example, the battery 10 may be installed at the bottom, front, or rear of the vehicle 1. The battery 10 may be used to supply power to the vehicle 1. For example, the battery 10 may be used as an operating power source for the vehicle 1, for the vehicle's electrical circuit system, for example, to meet the operating power needs of the vehicle 1 during starting, navigation, and driving. In another embodiment of the present application, the battery 10 may not only be used as the operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, providing driving power to the vehicle 1 instead of, or in place of, fuel oil or natural gas.

[0037] As shown in FIG. 2 , the battery 10 referred to in the embodiments of the present application refers to a single physical module including one or more battery cells 200 to provide higher voltage and capacity. For example, the battery 10 referred to in the present application may include a battery module or a battery pack. The battery 10 generally includes a casing 100 for packaging one or more battery cells 200. The casing 100 can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells. Specifically, the casing 100 includes a case cover 101 and a case housing 102, which are engaged with each other. The shapes of the case cover 101 and the case housing 102 may be determined according to the combined shape of the multiple battery cells 200.

[0038] Multiple battery cells 200 are connected in series and / or parallel via poles and can be used in a variety of applications. For high-power applications, such as some electric vehicles, battery applications include three layers: battery cells, battery modules, and battery packs. A battery module is formed by electrically connecting a certain number of battery cells and placing them in a frame to protect them from external impact, heat, vibration, etc. A battery pack is the final stage of a battery system installed in an electric vehicle. A battery pack typically includes a casing for packaging one or more battery cells. The casing can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells. The casing typically consists of a lid and a case. Currently, most battery packs are manufactured by assembling various control and protection systems, such as a battery management system (BMS) and thermal management components, with one or more battery modules. With technological advances, the battery module layer can be omitted; that is, a battery pack can be formed directly from battery cells. This improvement will increase the gravimetric energy density and volumetric energy density of the battery system, and will also significantly reduce the number of parts. The batteries referred to in this application include battery modules or battery packs.

[0039] In the present application, the battery cell 200 may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium ion battery, a sodium ion battery, or a magnesium ion battery, but is not limited thereto in the embodiments of the present application. The battery cell may be cylindrical, flat, rectangular, or have other shapes, but is not limited thereto in the embodiments of the present application. Battery cells are generally divided into three types based on their packaging: cylindrical battery cells, rectangular prismatic battery cells, and pouch battery cells, but is not limited thereto in the embodiments of the present application.

[0040] 3 to 5, a first aspect of the present application provides a battery including a sampling device 300 and at least two battery cells 200 arranged in a first direction, wherein poles 210 are installed at the ends of the battery cells 200, and the extension direction of the poles 210 protruding from the ends of the battery cells 200 is perpendicular to the first direction. The sampling device 300 includes a sampling member 310 having a sampling signal line built therein, and at least two mounting portions 320 are formed on the sampling member 310, and the mounting portions 320 conform to the side shapes of the poles 210 so that the mounting portions 320 are in close contact with the poles 210 of the corresponding battery cells 200. The sampling device 300 further includes a connection portion 330 for electrically connecting the mounting portions 320 and the poles 210, which is connected to the sampling signal line.

[0041] The battery cell 200 is the smallest unit constituting the battery 10 and may include an end cover, a case, a cell assembly, and other functional components, such as an insulating layer. The end cover refers to a component that covers the opening of the case and isolates the internal environment of the battery cell 200 from the external environment. The case is a component that houses the electrode assembly to form the battery cell 200, and the case also contains an electrolyte and other components. The case may be made of various materials, such as an iron shell, an aluminum shell, or a stainless steel shell. The electrode assembly is a component where an electrochemical reaction occurs in the battery cell 200. One or more electrode assemblies may be contained within the case. The electrode assembly is mainly formed by winding or stacking a positive electrode plate and a negative electrode plate, and a separator is typically provided between the positive electrode plate and the negative electrode plate.

[0042] The poles 210 communicate with the components inside and outside the battery cell 200, and one end of the poles 210 is connected to a cell assembly inside the battery cell 200. The poles 210 may protrude from an end cover at the end of the battery cell 200, and by connecting the poles 210 of multiple battery cells 200, the battery cells 200 can be connected in series or in parallel.

[0043] The end of the battery cell 200 refers to the location where the end cover of the battery cell 200 is located.

[0044] The battery 10 may include battery cells 200 arranged in a matrix. The battery cells 200 arranged in a matrix have "rows" and "columns." If the extension direction of the poles 210 protruding from the end of the battery cell 200 is defined as a "column," then multiple battery cells 200 arranged along the "column" direction can be electrically connected by arranging the poles 210 facing each other. The direction perpendicular to the "column" is a "row." The first direction in the embodiments of this application refers to the "row."

[0045] The sampling device 300 refers to a device for collecting electrical signals of a battery, and can collect parameters such as the voltage or current of the battery cell 200 and send the collected data back to the battery management system.

[0046] The sampling member 310 refers to a component that specifically collects and transmits the collected electrical signals in the sampling device 300. For example, the sampling member 310 may be a flexible flat cable (FFC) or a flexible printed circuit board (FPC), both of which have built-in sampling signal lines capable of collecting and transmitting signals. The sampling signal lines refer to various wires or cables capable of transmitting electrical signals.

[0047] The mounting portion 320 refers to a structural part of the sampling member 310, and its main function is to allow the sampling member 310 to maintain a relative positional relationship with the battery cell 200. For example, the mounting portion 320 may have a shape that matches the side shape of the pole 210 of the battery cell 200, so that when the mounting portion 320 is attached to the pole 210, the sampling member 310 can easily maintain a stable relative position with the battery cell 200.

[0048] The connection part 330 is a structure for realizing an electrical connection between the sampling signal line in the sampling member 310 and the pole 210, and is usually a metal member with good conductivity, such as a common aluminum member, nickel member, or nickel alloy member.

[0049] When the sampling device 300 is applied to a battery, the sampling signal line in the sampling member 310 is electrically connected to the pole 210 via the connection part 330, and the sampling signal characterizing the parameter state of the battery cell 200 is collected by the sampling signal line via the connection part 330, and the sampling signal line further transmits the sampling signal to the battery management system.

[0050] In the battery according to the embodiment of the present application, at least two mounting portions 320 are formed on the sampling member 310 of the sampling device 300, and the mounting portions 320 conform to the side shapes of the poles 210 of the corresponding battery cells 200 so as to be in close contact with the poles 210, and the connecting portions 330 are used to electrically connect the mounting portions 320 to the poles 210 of the battery cells 200, thereby enabling further collection of electrical signals. After the sampling device 300 and the battery cells 200 are assembled, the sampling device 300 can be configured not to protrude from the surface of the battery cells 200, making full use of the extra space between the battery cells 200 and reducing the space occupied by the sampling device 300 within the battery 10, which is advantageous for further increasing the energy density of the battery 10.

[0051] According to some embodiments of the present application, still referring to Figures 3 to 5, the pole 210 is cylindrical, the mounting portion 320 is arc-shaped, and the arc-shaped mounting portion 320 is closely attached to the cylindrical pole 210.

[0052] The pole 210 has a cylindrical structure, and the mounting portion 320 has an arc shape that fits the shape of the pole 210. The inner diameter of the mounting portion 320 corresponds to the outer diameter of the pole 210, so that the mounting portion 320 is tightly attached to the pole 210, which reduces the space occupied by the energy region of the battery 10 and facilitates increasing the energy density of the battery 10.

[0053] According to some embodiments of the present application, the sampling device 300 further includes a double-sided tape 340 , one side of which is attached to the mounting portion 320 and the other side of which is attached to the pole 210 .

[0054] The double-sided tape 340 refers to a tape that can be attached on both sides. Typically, double-sided tape is made by uniformly applying an elastomer-type pressure-sensitive adhesive or a resin-type pressure-sensitive adhesive to a substrate such as paper, cloth, or plastic film.

[0055] The double-sided tape 340 is installed on one side where the mounting part 320 and the electrode post 210 are combined, and the mounting part 320 is attached to the electrode post 210. The double-sided tape 340 is used to pre-fix the mounting part 320 of the sampling device 300 to the electrode post 210, i.e., before connecting the connection part 330 to the electrode post 210 of the battery cell 200, the mounting part 320 is first fixed to the electrode post 210 with the double-sided tape 340, thus facilitating the electrical connection between the connection part 330 and the electrode post 210. In addition, pre-fixing the sampling device 300 to the electrode post 210 with the double-sided tape 340 has low material costs, is light in weight, and is small in volume, so it does not occupy the energy region of the battery 10 and makes the assembly of the battery 10 easier.

[0056] According to some embodiments of the present application, there are two pieces of double-sided tape 340 corresponding to each mounting portion 320 , and the connecting portion 330 is located between the two pieces of double-sided tape 340 .

[0057] The two double-sided tapes 340 are placed on both sides of the connecting portion 330, so that the connecting portion 330 and the pole 210 can be better attached and fixed together during assembly.

[0058] According to some embodiments of the present application, the double-sided tape 340 is a double-sided foam tape.

[0059] The double-sided foam tape may be a PE foam double-sided tape, an EVA foam double-sided tape, a PU foam double-sided tape, an acrylic foam double-sided tape, etc., and the embodiments of the present application are not limited thereto.

[0060] The double-sided foam tape has strong adhesive properties, excellent holding power, and strong heat resistance. In addition, the double-sided foam tape has good elasticity, so it can accommodate the dimensional tolerance between the mounting part 320 and the pole 210 during the assembly process.

[0061] According to some embodiments of the present application, the connection portion 330 is a bonding pad for welding the mounting portion 320 and the pole post 210 together.

[0062] A bonding pad is a structure on a component that is dedicated to welding to other electrical devices. In the embodiment of the present application, the bonding pad is used for welding the sampling signal line to the electrode post 210. The shape of the bonding pad may be circular, rectangular, or the like, and the material of the bonding pad may be nickel or aluminum, but is not limited thereto in the embodiment of the present application. The bonding pad is used for electrical connection between the mounting portion 320 and the electrode post 210 and for transmitting electrical signals, and various welding processes such as laser welding, ultrasonic welding, and soldering can be applied.

[0063] In the battery according to the embodiment of the present application, the connection portion 330 is a bonding pad, i.e., the mounting portion 320 and the pole 210 are welded and fixed by the bonding pad, which has the effect of strengthening the connection, and the bonding pad also serves to electrically connect the sampling device 300 and the pole 210, thus simplifying the structure of the sampling device 300.

[0064] According to some embodiments of the present application, referring to FIG. 4, the size of the bonding pad in the second direction is smaller than the size of the mounting portion 320 in the second direction, where the second direction is perpendicular to the first direction.

[0065] The second direction is the arrangement direction in which the battery cells 200 in each row are connected in series, and the bonding pads are installed in the center of the mounting portion 320 along the second direction.

[0066] In the battery according to the embodiment of the present application, the mounting portion 320 is larger than the bonding pad in the second direction, so that the bonding pad does not come into contact with the end cover and the pole 210 of the battery cell 200 at the same time during the mounting process, thereby avoiding an external short circuit of the battery cell 200 and reducing safety risks.

[0067] According to some embodiments of the present application, the sampling member 310 is a flexible circuit board.

[0068] Flexible circuit boards are highly reliable flexible printed circuit boards that use polyimide or polyester film as a base material. They are also called flexible substrates or FPCs and are characterized by their high wiring density, light weight, and thin thickness.

[0069] A flexible circuit board is used, which can be formed on-site to the size of the pole 210, and can be pressed down and attached manually or by tooling, thereby better adapting to the shape of the pole 210.

[0070] According to some embodiments of the present application, and referring to FIGS. 4-5, the sampling device 300 further includes a thermistor 350, which is connected to the bonding pad by a thermally conductive structural adhesive.

[0071] The thermistor 350 is a type of sensitive element, and can be divided into positive temperature coefficient thermistors (PTC) and negative temperature coefficient thermistors (NTC) according to their different temperature coefficients. Thermistors are typically characterized by being temperature sensitive and exhibiting different resistance values ​​at different temperatures. The higher the temperature of a positive temperature coefficient thermistor (PTC), the higher its resistance value, while the higher the temperature of a negative temperature coefficient thermistor (NTC), the lower its resistance value.

[0072] If it is necessary to collect the temperature signal of the battery cell 200, the sampling device 300 can also be provided with a thermistor 350. The thermistor 350 is connected to the bonding pad, and in this way, the distance between the thermistor 350 and the pole 210 is closer, less than 5 mm, to prevent excessive energy loss during the heat conduction process and make the temperature sampling more accurate.

[0073] According to some embodiments of the present application, referring to Figures 3 to 5, the sampling device 300 further includes a connector 360, and the battery 10 further includes a battery management system (not shown), and the connector 360 is used to connect with the battery management system, thereby transmitting the sampling signal collected by the sampling device 300 to the battery management system.

[0074] The connector 360 refers to a member for establishing an electrical signal transmission relationship between the sampling member 310 and the battery management system. The connector 360 adopts a shape compatible with the signal interface of the battery management system so that the connector 360 can be connected to the signal interface of the battery management system to establish an electrical signal transmission relationship between the sampling member 310 and the battery management system.

[0075] The connector 360 has one end connected to the sampling member 310 and the other end connected to the battery management system, and transmits the electrical signals collected by the sampling member 310 to the battery management system.

[0076] According to some embodiments of the present application, the battery cells 200 are distributed in a plurality of rows, each row including at least two battery cells 200 connected along at least the second direction, and each battery cell 200 in each row is connected in series. The number of sampling devices 300 is plural, and the number of battery cells 200 included in each row of the battery cells 200 is equal to the number of sampling devices 300.

[0077] Connecting the battery cells 200 in series can increase the battery voltage, and the battery cells 200 are connected in series to each other via poles 210, and the sampling device 300 is installed between the battery cells 200 to sample each battery cell 200.

[0078] According to some embodiments of the present application, a plurality of rows of battery cells 200 are arranged along a first direction, and poles 210 are provided at the ends of the battery cells 200, and the poles 210 are cylindrical. Along a second direction, each row of battery cells 200 has at least two battery cells 200 connected in series by the poles 210. Along the first direction, the sampling device 300 has mounting portions 320 corresponding to the serially connected poles 210. The middle of the mounting portions 320 has a connecting portion 330 that is smaller than the mounting portion 320 along the second direction, and the mounting portion 320 has an arc shape that fits the shape of the poles 210. The mounting portion 320 is attached to the poles 210 by bonding, and the connecting portion 330 is electrically connected to the poles 210. A connector 360 is provided at the end of the sampling member 310, and an electrical signal collected by the connecting portion 330 is returned to the battery management system via the sampling signal line of the sampling member 310 and the connector 360.

[0079] In the battery according to the embodiment of the present application, at least two mounting portions 320 are formed on the sampling member 310 of the sampling device 300, and the mounting portions 320 conform to the side shapes of the poles 210 of the corresponding battery cells 200 so as to be in close contact with the poles 210, and the connecting portions 330 are used to electrically connect the mounting portions 320 to the poles 210 of the battery cells 200, thereby enabling further collection of electrical signals. After the sampling device 300 and the battery cells 200 are assembled, the sampling device 300 can be configured not to protrude from the surface of the battery cells 200, making full use of the extra space between the battery cells 200 and reducing the space occupied by the sampling device 300 within the battery 10, which is advantageous for further increasing the energy density of the battery 10. In addition, since the size of the connection part 330 is smaller than that of the mounting part 320, the connection part 330 can avoid accidentally contacting the end cover of the battery during the mounting process, thereby avoiding an external short circuit of the battery cell and reducing safety risks.

[0080] According to a second aspect of the present application, there is provided a method for manufacturing a battery, the method including: providing at least two battery cells 200 arranged in a first direction, wherein poles 210 are installed at ends of the battery cells 200; and providing a sampling device 300, wherein the sampling device 300 includes a sampling member 310 having a sampling signal line built therein, wherein at least two mounting portions 320 are formed on the sampling member 310, and the mounting portions 320 conform to the side shape of the pole 210 so that the mounting portions 320 are in close contact with the pole 210; and the sampling device 300 further includes bonding pads connected to the sampling signal line, wherein the bonding pads are installed on the mounting portions 320 and welded to the pole 210.

[0081] The sampling device 300 is a device for collecting electrical signals from the battery cell 200, and can collect parameters such as the voltage or current of the battery cell 200 and return the collected data to the battery management system. The sampling device 300 needs to be electrically connected to the pole 210 and is attached from the side of the pole 210 of the battery cell 200. Therefore, the mounting portion 320 of the sampling device 300 is adapted to the shape of the side of the pole 210 so as to be better attached to the pole 210. The connection portion 330 is for electrically connecting the mounting portion 320 and the pole 210, and the sampling device 300 can collect parameters of the battery cell 200 through electrical signals.

[0082] In the battery 10 manufactured by the battery manufacturing method according to the embodiment of the present application, at least two mounting portions 320 are formed on the sampling member 310 of the sampling device 300, and the mounting portions 320 conform to the side shapes of the poles 210 of the corresponding battery cells 200 so as to be in close contact with the poles 210, and the connecting portions 330 are used to electrically connect the mounting portions 320 to the poles 210 of the battery cells 200, thereby enabling further collection of electrical signals. After the sampling device 300 and the battery cells 200 are assembled, the sampling device 300 can be configured not to protrude from the surface of the battery cells 200, making full use of the extra space between the battery cells 200 and reducing the space occupied by the sampling device 300 within the battery 10, which is advantageous for further increasing the energy density of the battery 10.

[0083] According to a third aspect of the present application, there is provided a power consumption device, the power consumption device comprising a battery according to any one of the embodiments of the first aspect, wherein the battery 10 is used to provide electrical energy to the power consumption device.

[0084] In the battery 10 applied to the power consumption device according to the embodiment of the present application, at least two mounting portions 320 are formed on the sampling member 310 of the sampling device 300 thereof, and the mounting portions 320 conform to the side shapes of the poles 210 of the corresponding battery cells 200 so as to be in close contact with the poles 210, and the connecting portions 330 are used to electrically connect the mounting portions 320 to the poles 210 of the battery cells 200, thereby enabling further collection of electrical signals. After the sampling device 300 and the battery cells 200 are assembled, the sampling device 300 can be configured not to protrude from the surface of the battery cells 200, making full use of the extra space between the battery cells 200 and reducing the space occupied by the sampling device 300 within the battery 10, which is advantageous for further increasing the energy density of the battery 10.

[0085] Finally, it should be noted that the above embodiments are used only to explain the technical solutions of the present application, and are not intended to limit the same. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. These modifications or substitutions do not deviate from the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and should be encompassed by the claims and the description of the present application. In particular, as long as there is no structural contradiction, any of the technical features mentioned in the embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions encompassed by the claims. [Explanation of symbols]

[0086] Vehicle 1, battery 10, controller 30, motor 40, Casing 100, case cover 101, case housing 102, battery cell 200, pole 210, Sampling device 300, sampling member 310, mounting portion 320, connecting portion 330, double-sided tape 340, thermistor 350, and connector 360.

Claims

1. A battery, At least two battery cells arranged in a first direction, poles are installed at ends of the battery cells, and the extension direction of the poles protruding from the ends of the battery cells is perpendicular to the first direction; a sampling device including a sampling member having a sampling signal line built therein, at least two mounting portions formed on the sampling member, the mounting portions adapted to a side surface shape of the pole of the corresponding battery cell so as to be in close contact with the pole, and the sampling device further including a connecting portion connected to the sampling signal line for electrically connecting the mounting portions and the pole; The battery is characterized in that the sampling member is flexible.

2. 2. The battery according to claim 1, wherein the pole is cylindrical, the mounting portion is arc-shaped, and the arc-shaped mounting portion is in close contact with the cylindrical pole.

3. 2. The battery according to claim 1, wherein the sampling device further includes a double-sided tape, one side of which is attached to the mounting portion and the other side of which is attached to the pole.

4. 4. The battery according to claim 3, wherein there are two pieces of double-sided tape corresponding to each of the attachment portions, and the connection portion is located between the two pieces of double-sided tape.

5. 4. The battery according to claim 3, wherein the double-sided tape is a foam double-sided tape.

6. 6. The battery according to claim 1, wherein the connecting portion is a bonding pad for welding the mounting portion and the terminal post.

7. 7. The battery of claim 6, wherein the size of the bonding pad in the second direction is smaller than the size of the mounting portion in the second direction, and the second direction is perpendicular to the first direction.

8. 2. The battery of claim 1, wherein the sampling member is a flexible circuit board.

9. 8. The battery of claim 6 or 7, wherein the sampling device further includes a thermistor, the thermistor being connected to the bonding pad by a thermally conductive structural adhesive.

10. The battery of any one of claims 1 to 9, characterized in that the sampling device further includes a connector, the battery further includes a battery management system, and the connector is used to connect to the battery management system, thereby transmitting the sampling signal collected by the sampling device to the battery management system.

11. The battery cells are distributed in a plurality of rows, and each row of the battery cells includes at least two of the battery cells connected along at least a second direction, and each of the battery cells in each row is connected in series; 11. The battery according to claim 1, wherein the number of the sampling devices is plural, and the number of battery cells included in the battery cells in each row is equal to the number of the sampling devices.

12. A method for manufacturing a battery, comprising: providing at least two battery cells arranged in a first direction, with poles installed at the ends of the battery cells; A method for manufacturing a battery, comprising: providing a sampling device, the sampling device including a sampling member having a sampling signal line built therein; at least two mounting portions formed on the sampling member, the mounting portions conforming to a side shape of the electrode post so as to be in close contact with the electrode post; the sampling device further including bonding pads connected to the sampling signal line, the bonding pads being installed on the mounting portions and welded to the electrode post.

13. A power consuming device comprising a battery according to any one of claims 1 to 11.

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