WO2023207617A1 - Ensemble d'échantillonnage, batterie et dispositif électrique - Google Patents

Ensemble d'échantillonnage, batterie et dispositif électrique Download PDF

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Publication number
WO2023207617A1
WO2023207617A1 PCT/CN2023/088161 CN2023088161W WO2023207617A1 WO 2023207617 A1 WO2023207617 A1 WO 2023207617A1 CN 2023088161 W CN2023088161 W CN 2023088161W WO 2023207617 A1 WO2023207617 A1 WO 2023207617A1
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WO
WIPO (PCT)
Prior art keywords
segment
circuit board
sampling
battery
section
Prior art date
Application number
PCT/CN2023/088161
Other languages
English (en)
Chinese (zh)
Inventor
谌启财
王冲
郑陈铃
甘卫锋
Original Assignee
宁德时代新能源科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Publication of WO2023207617A1 publication Critical patent/WO2023207617A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of batteries, and in particular to a sampling component, a battery and an electrical device.
  • this application provides a sampling component, a battery and an electrical device, which can reduce the problem of the flexible circuit board tearing and the sampling pin being pulled and deformed during the sampling process of the battery.
  • the application provides a sampling component for a battery.
  • the sampling component includes: a circuit board for collecting electrical parameters of a plurality of battery cells arranged side by side along a first direction.
  • the circuit board includes a first segment. and a second segment, the first segment is extended and formed along the first direction, and at least part of the second segment is arranged to intersect with the first segment; a sampling pin, a plurality of sampling pins are arranged on the first segment at intervals along the first direction. section to allow the circuit board to acquire electrical parameters through the sampling pins.
  • the sampling component includes a circuit board and a sampling pin.
  • the sampling pin is used to obtain the electrical parameters of the battery cell
  • the circuit board is used to transmit the electrical parameters.
  • the circuit board includes a first segment and a second segment, and at least part of the second segment intersects with the first segment, so that at least part of the second segment intersects with the first direction, such that the second segment is in the first direction
  • the influence of the sampling pin of the segment is ensured to ensure the stability of the relative position between the first segment and the sampling pin, and the stability of the relative position of the sampling pin and the battery cell, so as to protect the sampling pin from obtaining power normally. parameters to improve the reliability of the sampling component.
  • two first segments are connected to both sides of the second segment in the first direction.
  • the second segment includes a first part spaced apart along the first direction, a second part, and a connecting section connecting the first part and the second part.
  • At least part of the first part and the connecting section are stacked in the thickness direction of the circuit board, and/or at least part of the second part and the connecting section are stacked in the thickness direction of the circuit board.
  • the stacking is arranged so that the second segment can be formed by folding the circuit board profile.
  • the second section can be formed by folding the circuit board profile of equal width, and the folded section can improve the second section
  • the deformation margin enables the deformation margin to better support the deformation of the second segment in the first direction to absorb part of the vibration impact.
  • the sampling assembly further includes: an insulating member for supporting the circuit board; a reinforcing portion, at least one reinforcing portion is disposed on a side of the circuit board away from the insulating member, and at least part of the reinforcing portion is along the second direction Extend the circuit board and connect the insulator with the second direction intersecting the first direction.
  • the reinforcing part By arranging the reinforcing part on the circuit board and connecting the reinforcing part to the insulating part, the reinforcing part can strengthen the connection between the circuit board and the insulating part and reduce the relative displacement between the circuit board and the insulating part.
  • At least one reinforcement is located between at least one sampling pin and the second segment.
  • the number of reinforcing parts is more than two, and the two or more reinforcing parts are provided on both sides of the second segment in the first direction.
  • a relief hole is opened in the insulating member, and the second segment is arranged around at least part of the relief hole.
  • the sampling component further includes a bus for connecting the electrode terminals of the battery cells, and the sampling pin is connected between the bus and the circuit board.
  • the bus piece can collect the electrode terminals of multiple battery cells, and the sampling pins can obtain electrical parameters through the bus piece.
  • the present application provides a battery including any of the above sampling components.
  • the battery further includes an outer frame for accommodating the battery cells; a limiting member that is extended and formed along the second direction, the limiting member is located in the outer frame and is used to separate the outer frames to be arranged side by side along the first direction.
  • the present application provides an electrical device.
  • the electrical device includes any of the above-mentioned batteries, and the battery is used to provide electrical energy.
  • Figure 1 is a schematic structural diagram of a vehicle provided by an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of a battery pack provided by an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of a battery module provided by an embodiment of the present application.
  • Figure 4 is a schematic diagram of the exploded structure of a battery cell provided by an embodiment of the present application.
  • Figure 5 is a schematic structural diagram of a sampling assembly for a battery provided by an embodiment of the present application.
  • Figure 6 is a schematic diagram of the connection between the first segment and the second segment in a sampling assembly provided by an embodiment of the present application;
  • Figure 7 is a schematic diagram of the connection between the first segment and the second segment in another sampling assembly provided by an embodiment of the present application.
  • Figure 8 is a schematic diagram of the connection between the first segment and the second segment in yet another sampling assembly provided by an embodiment of the present application;
  • Figure 9 is an exploded view of a battery cell and a sampling assembly provided by an embodiment of the present application.
  • Figure 10 is a schematic connection diagram of a circuit board, sampling pins and reinforcing parts provided by an embodiment of the present application;
  • Figure 11 is a schematic structural diagram of a battery provided by an embodiment of the present application.
  • the reference numbers in the specific implementation are as follows: 1 vehicle, 10 batteries, 11 controllers, 12 motors; 20 battery modules, 21 battery cells, 211 end caps, 211a electrode terminals, 212 shell, 213 electrode assembly; 30 cabinet, 301 first cabinet part, 302 second cabinet part; 40 sampling component, 41 circuit board, 411 first segment, 412 second segment, 412a first part, 412b second part, 412c connecting section, 42 sampling pin, 43 reinforcement, 44 insulator, 441 give way hole, 45 manifold; 51 outer frame, 52 limiting parts.
  • the first specific The term “on” or “under” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium.
  • the terms “above”, “above” and “above” the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature.
  • “Below”, “below” and “beneath” the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.
  • Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles and electric cars, as well as in many fields such as military equipment and aerospace. . As the application fields of power batteries continue to expand, their market demand is also constantly expanding.
  • the sampling stability of the battery and the structural reliability of the sampling assembly are becoming more and more important.
  • the vibration shock intensity or frequency of the battery cells at different positions in the battery may be inconsistent, causing the circuit board and sampling pins to be inconsistent. Due to the impact of vibration and shock, the circuit board is pulled and even the circuit board is torn and the sampling pin is broken, which reduces the reliability of the sampling component and seriously affects the stability of battery sampling.
  • a deformation section can be set on the circuit board in the sampling component.
  • the circuit board is divided into a first section and a second section.
  • the first segment is extended and shaped along the first direction
  • the sampling pin is arranged on the first segment
  • at least part of the second segment is arranged to intersect with the first segment.
  • the deformation margin can support the deformation of the second segment in the first direction. That is, when multiple battery cells arranged side by side in the first direction are subjected to vibration and impact, the second segment in the circuit board can deform to absorb part of the vibration and impact, improving the impact of vibration and impact on the first segment and the first segment.
  • the influence of the sampling pin of the segment is ensured to ensure the stability of the relative position between the first segment and the sampling pin, and the stability of the relative position of the sampling pin and the battery cell, thereby improving the reliability of the sampling component. And improve the stability of battery sampling.
  • Embodiments of the present application provide a sampling component, a battery including the sampling component, and an electrical device using the battery.
  • This sampling component is suitable for any battery, such as battery modules and battery packs, or primary batteries and secondary batteries.
  • secondary batteries include nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid (or lead-acid) batteries, and lithium-ion batteries. , sodium-ion battery, polymer battery, etc.
  • This kind of battery is suitable for various electrical devices that use batteries, such as mobile phones, portable devices, laptops, battery cars, electric toys, power tools, electric vehicles, ships and spacecraft, etc.
  • spacecraft include aircraft, rockets, aerospace Aircrafts and spacecrafts, etc.; batteries are used to provide electrical energy for the above electrical equipment.
  • the electrical device provided by the embodiment of the present application may be a vehicle, a mobile phone, a portable device, a laptop, a ship, a spacecraft, an electric toy, an electric tool, etc.
  • Vehicles can be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc.
  • spacecraft include aircraft, rockets, space shuttles, spaceships, etc.
  • electric toys include fixed Type or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.
  • electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, for example, Electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, planers and more.
  • Electric drills Electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, planers and more.
  • the embodiments of this application impose no special restrictions on the
  • Vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.
  • the battery 10 is disposed inside the vehicle 1 , and the battery 10 can be disposed at the bottom, head, or tail of the vehicle 1 .
  • the battery 10 may be used to power the vehicle 1 , for example, the battery 10 may serve as an operating power source for the vehicle 1 .
  • the vehicle 1 may also include a controller 11 and a motor 12 .
  • the controller 11 is used to control the battery 10 to provide power to the motor 12 , for example, for starting, navigating, and driving the vehicle 1 to meet its power requirements.
  • the battery 10 can not only be used as an operating power source of the vehicle 1 , but also can be used as a driving power source of the vehicle 1 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1 .
  • the battery 10 may include multiple battery cells 21 , where the battery cells 21 refer to the smallest unit that constitutes the battery module 20 or the battery pack. Multiple battery cells 21 may be connected in series and/or in parallel via electrode terminals to be used in various applications.
  • the battery 10 mentioned in this application includes a battery module 20 or a battery pack. Among them, the plurality of battery cells 21 can be connected in series, in parallel, or in mixed connection. Mixed connection refers to a mixture of series connection and parallel connection.
  • multiple battery cells can be directly formed into a battery pack, or the battery module 20 can be formed first, and then the battery module 20 can be formed into a battery pack.
  • FIG. 2 shows a schematic structural diagram of a battery 10 according to an embodiment of the present application.
  • the battery 10 includes a case 30 and battery cells (not shown).
  • the battery cells are accommodated in the case 30 .
  • the box 30 may be a single cuboid, a simple three-dimensional structure such as a cylinder or a sphere, or a complex three-dimensional structure composed of a combination of simple three-dimensional structures such as a cuboid, a cylinder or a sphere, which is not limited in the embodiments of the present application.
  • the material of the box body 30 can be alloy materials such as aluminum alloy, iron alloy, etc., or polymer materials such as polycarbonate, polyisocyanurate foam, or composite materials such as glass fiber and epoxy resin. The embodiments of the present application are not limited to this.
  • the box 30 is used to accommodate battery cells, and the box 30 can be of various structures.
  • the box body 30 may include a first box body part 301 and a second box body part 302.
  • the first box body part 301 and the second box body part 302 cover each other.
  • the first box body part 301 and the second box body part 302 cover each other.
  • the two box portions 302 jointly define an accommodation space for accommodating battery cells.
  • the second box part 302 may be a hollow structure with one end open, and the first box part 301 may be a plate-like structure.
  • the first box part 301 covers the open side of the second box part 302 to form a container with a receiving space.
  • Box 30; the first box part 301 and the second box part 302 can also be hollow structures with one side open, and the open side of the first box part 301 is covered with the open side of the second box part 302, To form a box 30 with an accommodation space.
  • the first box part 301 and the second box part 302 can be in various shapes, such as cylinder, rectangular parallelepiped wait.
  • a sealing member may also be provided between the first box part 301 and the second box part 302, such as sealant, sealing ring, etc. .
  • the first box part 301 can also be called an upper box cover
  • the second box part 302 can also be called a lower box cover.
  • the battery 10 there may be one battery cell or a plurality of battery cells. If there are multiple battery cells, the multiple battery cells can be connected in series, in parallel, or in mixed connection. Mixed connection means that multiple battery cells are connected in series and in parallel. Multiple battery cells can be directly connected in series or parallel or mixed together, and then the whole composed of multiple battery cells can be accommodated in the box 30; of course, multiple battery cells can also be connected in series or parallel first or
  • the battery modules 20 are formed by a mixed connection, and the plurality of battery modules 20 are connected in series, parallel, or mixed to form a whole, and are accommodated in the box 30 .
  • FIG. 3 shows a schematic structural diagram of a battery module 20 according to an embodiment of the present application.
  • FIG. 3 there are multiple battery cells 21 , and the plurality of battery cells 21 are first connected in series, parallel, or mixed to form the battery module 20 .
  • a plurality of battery modules 20 are connected in series, parallel, or mixed to form a whole, and are accommodated in the box.
  • the plurality of battery cells 21 in the battery module 20 can be electrically connected through bus components to realize parallel, series or mixed connection of the plurality of battery cells 21 in the battery module 20 .
  • the battery cell 21 may include a lithium-ion battery cell, a sodium-ion battery cell, a magnesium-ion battery cell, etc., which is not limited in the embodiment of the present application.
  • the battery cell 21 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped or other shapes, and the embodiments of the present application are not limited thereto.
  • Battery cells 21 are generally divided into three types according to packaging methods: cylindrical battery cells 21, rectangular battery cells 21 and soft-pack battery cells 21, and the embodiment of the present application is not limited to this. However, for the sake of simplicity of description, the following embodiments take the rectangular battery cell 21 as an example.
  • FIG. 4 is a schematic diagram of the exploded structure of the battery cell 21 provided by some embodiments of the present application.
  • the battery cell 21 refers to the smallest unit that constitutes the battery. As shown in FIG. 4 , the battery cell 21 includes an end cover 211 , a case 212 and an electrode assembly 213 .
  • the end cap 211 refers to a component that covers the opening of the housing 212 to isolate the internal environment of the battery cell 21 from the external environment.
  • the shape of the end cap 211 may be adapted to the shape of the housing 212 to fit the housing 212 .
  • the end cap 211 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap 211 is less likely to deform when subjected to extrusion and collision, so that the battery cell 21 can have higher durability. Structural strength and safety performance can also be improved.
  • the end cap 211 may be provided with functional components such as electrode terminals 211a.
  • the electrode terminal 211a may be used to electrically connect with the electrode assembly 213 for outputting or inputting electrical energy of the battery cell 21 .
  • the end cap 211 may also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 21 reaches a threshold.
  • the end cap 211 can also be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in the embodiment of the present application.
  • an insulating member may also be provided inside the end cover 211 , and the insulating member may be used to isolate the electrical connection components in the housing 212 from the end cover 211 to reduce the risk of short circuit.
  • the insulating member may be plastic, rubber, etc.
  • the housing 212 is a component used to cooperate with the end cover 211 to form an internal environment of the battery cell 21 , wherein the formed internal environment can be used to accommodate the electrode assembly 213 , electrolyte (not shown in the figure) and other components.
  • the housing 212 and the end cover 211 may be independent components, and an opening may be provided on the housing 212.
  • the end cover 211 covers the opening at the opening to form the internal environment of the battery cell 21.
  • the end cover 211 and the housing 212 can also be integrated.
  • the end cover 211 and the housing 212 can form a common connection surface before other components are put into the housing. When it is necessary to encapsulate the inside of the housing 212 When the end cap 211 is closed, the housing 212 is closed.
  • the housing 212 may be of various shapes and sizes, such as rectangular parallelepiped, cylinder, hexagonal prism, etc. Specifically, the shape of the housing 212 can be determined according to the specific shape and size of the electrode assembly 213 .
  • the housing 212 may be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in the embodiment of the present application.
  • the electrode assembly 213 is a component in the battery cell 21 where electrochemical reactions occur.
  • One or more electrode assemblies 213 may be contained within the housing 212 .
  • the electrode assembly 213 is mainly formed by winding or stacking positive electrode sheets and negative electrode sheets, and usually a separator is provided between the positive electrode sheets and the negative electrode sheets.
  • the portions of the positive electrode sheet and the negative electrode sheet that contain active material constitute the main body of the electrode assembly 213, and the portions of the positive electrode sheet and the negative electrode sheet that do not contain active material each constitute tabs (not shown in the figure).
  • the negative electrode tab and the negative electrode tab can be located together at one end of the main body or respectively at both ends of the main body. During the charging and discharging process of the battery 10, the positive active material and the negative active material react with the electrolyte, and the tabs are connected to the electrode terminals 211a to form a current loop.
  • FIG. 5 is a schematic structural diagram of a sampling assembly 40 for the battery 10 provided by an embodiment of the present application.
  • the sampling component 40 includes a circuit board 41 and sampling pins 42 provided on the circuit board 41 .
  • the circuit board 41 is used to collect electrical parameters of multiple battery cells 21 arranged side by side along the first direction X.
  • the circuit board 41 includes a first section 411 and a second section 412.
  • the first section 411 is along the first direction X. By extending and forming, at least part of the second section 412 intersects the first section 411 .
  • a plurality of sampling pins 42 are arranged in the first segment 411 at intervals along the first direction X, so that the circuit board 41 obtains electrical parameters through the sampling pins 42 .
  • the sampling component includes a circuit board 41 and a sampling pin 42.
  • the sampling pin 42 is used to obtain the electrical parameters of the battery cell 21, and the circuit board 41 is used to transmit the electrical parameters.
  • the circuit board 41 includes a first segment 411 and a second segment 412, and at least part of the second segment 412 intersects the first segment 411, so at least part of the second segment 412 intersects the first direction X, so that the second
  • the segment 412 has a deformation margin in the first direction X, and at least part 412 can extend along the second direction Y and/or the third direction Z.
  • the deformation margin can support the second segment 412 in the first direction X Deformation.
  • the second segment 412 may be in the shape of a polyline or a curve. That is, the extension path of the second segment 412 protrudes beyond the first segment 411 along the second direction Y and/or the third direction Z.
  • the influence of the sampling pin 42 of the first segment 411 ensures the stability of the relative position between the first segment 411 and the sampling pin 42, and the stability of the relative position of the sampling pin 42 and the battery cell 21, so as to This protects the sampling pin 42 from normally obtaining electrical parameters and improves the reliability of the sampling component 40 .
  • two first segments 411 are connected to both sides of the second segment 412 in the first direction X.
  • the circuit board 41 may include a plurality of first sections 411 and second sections 412.
  • the first sections 411 and the second sections 412 They are arranged alternately in the extending direction of the circuit board 41 .
  • the specific extension direction of the circuit board 41, the number and length of the first segments 411, and the number and length of the second segments 412 can be set according to the actual structure of the battery 10, and the setting is such that the second segment 412 can absorb part of the battery 10.
  • the vibration and impact suffered by the battery 10 shall be sufficient to reduce the impact of the vibration and impact on the circuit board 41 and the sampling pin 42 .
  • Figure 6 is a schematic diagram of the connection between the first section 411 and the second section 412 in a sampling assembly 40 provided by an embodiment of the present application.
  • Figure 7 is a schematic diagram of the connection between the first section 411 and the second section 412 in another sampling assembly 40 provided by an embodiment of the present application.
  • Figure 8 is a connection diagram of yet another sampling assembly 40 provided by an embodiment of the present application. Schematic diagram of the connection between the first section 411 and the second section 412.
  • the Z-axis direction is the third direction Z
  • the third direction Z is the thickness direction of the first segment 411 .
  • the second segment 412 can be divided into multiple parts for detailed explanation. However, for the sake of simplicity of description, the following is an example of dividing the second segment 412 into three parts. The shape of the second segment 412 is described.
  • the second segment 412 includes a first portion 412a, a second portion 412b spaced apart along the first direction X, and a connecting section 412c connecting the first portion 412a and the second portion 412b.
  • the second section 412 can better absorb vibration shock.
  • the first part 412a and the second part 412b may be mainly used to support the deformation of the second segment 412 in the first direction X, for example, the first part 412a and the second portion 412b move closer or farther away from each other such that the second Segment 412 is deformable in the first direction X. That is, when the second segment 412 is deformed due to vibration and impact, its main deformation parts are the first part 412a and the second part 412b.
  • the connecting part 412c can be mainly used to connect the first part 412a and the second part 412b, and produce corresponding adaptive deformation as the first part 412a and the second part 412b deform, so as to reduce the vibration of the first segment of the battery cell. 411 may be pulled and torn.
  • the first portion 412a itself may include one or more curved segments and/or bending segments
  • the second segment 412b itself may It may also include one or more bending segments and/or bending segments
  • the connecting part 412c may also include one or more bending segments and/or bending segments.
  • At least part of the first part 412a and the connecting section 412c are stacked in the thickness direction of the circuit board 41, and/or, at least part of the second part 412b and the connecting section 412c is stacked in the thickness direction of the circuit board 41 so that the second section 412 can be formed by folding the circuit board profile.
  • the second section 412 can be folded from a constant-width circuit board profile by stacking a portion of the first portion 412a with the connecting section 412c, and/or stacking a portion of the second section 412b with the connecting section 412c.
  • the folded portion can increase the deformation margin of the second segment 412 so that the deformation margin can better support the deformation of the second segment 412 in the first direction X to absorb part of the vibration impact.
  • the folded part can also reduce the height of the second section 412 in the third direction Z, making the structure of the circuit board 41 more compact and reliable.
  • the circuit board 41 may be a flexible printed circuit board or other flexible circuit boards, so that the second section 412 in the circuit board 41 is more susceptible to deformation, thereby improving the efficiency of the second section 412 in absorbing vibration impacts.
  • FIG. 9 is an exploded view of a battery cell and a sampling assembly provided by an embodiment of the present application.
  • the sampling assembly 40 also includes an insulating member 44 and a reinforcing part 43.
  • the insulating member 44 is used to support the circuit board 41, and at least one A reinforcing portion 43 is provided on a side of the circuit board 41 away from the insulating member 44 , and at least part of the reinforcing portion 43 extends out of the circuit board 41 along the second direction Y and is connected to the insulating member 44 .
  • the reinforcing part 43 can strengthen the connection between the circuit board 41 and the insulating part 44 and reduce the distance between the circuit board 41 and the insulating part. 44 relative displacement.
  • the material of the insulating member 44 may be epoxy resin.
  • the insulating member 44 may be provided with a groove (not shown in the figure), and the groove may be used to accommodate or fix the circuit board 41 to further reduce the displacement of the circuit board 41 during vibration.
  • the reinforcing part 43 may be connected to the first segment 411 in the circuit board 41 , and the reinforcing part 43 may be connected to the first segment 411 by bonding.
  • the number and distribution positions on the first segment 411 are not limited.
  • at least one reinforcing portion 43 is provided on the side of the first segment 411 away from the insulating member 44 , and the reinforcing portion 43 may also be provided on the side of the first segment 411 facing the insulating member 44 .
  • Reinforcement portions 43 are provided on both sides of the first segment 411 at the same position away from and toward the insulating member 44 , and the portions of the upper and lower reinforcement portions 43 extending out of the circuit board 41 in the second direction Y are in contact with the insulation. 44 are connected.
  • FIG. 10 is a schematic connection diagram of a circuit board 41 , sampling pins 42 and reinforcing parts 43 provided by an embodiment of the present application. At least one reinforcement 43 is located between the at least one sampling pin 42 and the second segment 412 .
  • the number of reinforcing parts 43 is more than two, and the more than two reinforcing parts 43 are respectively provided in the second segment 412 in the first direction X. on both sides.
  • reinforcing portions 43 are provided on both sides of the second segment 412 in the first direction X to reduce the deformation of the first segment 411 on both sides of the second segment when it is subjected to vibration impact.
  • a relief hole 441 is opened in the insulating member 44 , and the second segment 412 is arranged around at least part of the relief hole 441 .
  • a relief hole 441 is opened in the insulating member 44 to facilitate the mounting of the battery 10 , and the second segment 412 surrounds at least part of the relief hole 441 to reduce the stress on the second segment 412 .
  • the specific shape of the relief hole 441 is not limited.
  • the shape of the relief hole 441 may be circular, square or other irregular shapes.
  • the specific shape of the relief hole 441 is subject to the convenience of mounting the battery 10 .
  • the specific location of the relief hole 441 is not limited.
  • the battery includes an outer frame and a limiter located in the outer frame.
  • the limiter is used to divide the outer frame into two or more accommodation spaces, each of which is divided into two or more accommodation spaces. Battery cells are installed in the accommodation space.
  • the relief hole 441 can be set on the limiter to make the battery force more balanced.
  • the specific location of the relief hole 441 is to ensure that it does not interfere with the sampling work of the sampling assembly 40. .
  • the portion of the circuit board 41 located near the relief hole 441 may be provided as the second segment 412 .
  • the second section 412 located near the relief hole 441 may be disposed around at least part of the relief hole 441 .
  • the second segment 412 is disposed around the relief hole 441 toward the outer contour of the relief hole 441
  • the second segment 412 faces the outer contour of the relief hole 441 .
  • the contour does not intersect the outer contour of the relief hole 441 .
  • the shape of the second segment 412 itself is not limited.
  • the second segment 412 may include a partially curved segment and/or a bent segment, so that the second segment 412 can be better positioned around at least part of the relief hole 441 to allow the circuit to The structure of plate 41 is more compact.
  • the sampling assembly 40 also includes a bus 45 for connecting the electrode terminal 211 a of the battery cell 21 , and the sampling pin 42 is connected to the bus 45 and the circuit. between plates 41.
  • the bus 45 can collect the electrode terminals 211a of multiple battery cells 21, And the sampling pin 42 can obtain the electrical parameters through the bus 45 .
  • the sampling pin 42 and the bus 45 can be connected by laser welding, ultrasonic welding or friction stir welding, and the bus 45 and the battery cell 21 can be connected by laser welding.
  • Connect by means of welding, ultrasonic welding or friction stir welding to fix the relative positions between the sampling pin 42, the bus 45 and the battery cells 21, and raise the sampling pin 42 to collect multiple battery cells 21 through the bus 45 reliability and stability when measuring electrical parameters.
  • the busbar 45 can be connected to the insulator 44 , so that the insulator 44 can limit the relative movement between the first section 411 and the busbar 45 to a certain extent.
  • the insulating member 44 may be provided with a corresponding limiting groove (not shown in the figure) for accommodating or fixing the bus 45 to further limit the relative movement between the first segment 411 and the bus 45 .
  • the present application also provides a battery, including the sampling assembly 40 described in any of the above solutions.
  • FIG. 11 is a schematic structural diagram of a battery provided by an embodiment of the present application.
  • the battery further includes: an outer frame 51 for accommodating the battery cells 21; a limiting member 52 extending along the second direction Y.
  • the limiting member 52 is located within the outer frame 51 and is used to separate the outer frame 51 into Two or more accommodation spaces are arranged side by side along the first direction
  • the limiter can limit the movement of the battery cells in the accommodation space to a certain extent, and by arranging the second segment across the limiter along the first direction X, so that The second segment can absorb the vibration impact of different battery cells located on both sides of the limiter.
  • the present application also provides an electrical device, including the battery described in any of the above solutions, and the battery is used to provide electrical energy to the electrical device.
  • the powered device can be any of the aforementioned devices or systems that use batteries.
  • the present application provides a sampling component 40.
  • the sampling component 40 includes a circuit board 41, sampling pins 42, reinforcing parts 43, insulating parts 44 and busbars. 45. Among them, the sampling pin 42 is connected to the bus 45, and the sampling pin 42 is used to obtain the electrical parameters.
  • the circuit board includes a first section 411 and a second section 412. The first section 411 is extended along the first direction X. The sampling pins 42 are arranged at intervals on the first section 411 along the first direction X. A section 411 and at least part of the second section 412 are arranged to intersect, and a second section 412 is connected to the first section 411 on both sides in the first direction X.
  • second segment 412 includes a first part 412a, a second part 412b, and a connecting section 413c connecting the first part 412a and the second part 412b. At least part of the first part 412a and the connecting part 412c are stacked in the third direction Z, and at least part of the second part 412b and the connecting section 412c are stacked in the third direction Z. The connecting sections 412c are stacked in the third Z direction.
  • the insulating member 44 is used to support the circuit board 41.
  • the insulating member 44 is provided with a relief hole 441, and the second section 412 is arranged around at least part of the relief hole 441.
  • the number of reinforcing parts 43 is more than two.
  • At least one reinforcing part 43 is provided on the side of the circuit board 41 away from the insulating member 44 , and at least part of the reinforcing parts 43 extends out of the circuit board 41 along the second direction Y and is connected. Insulating member 44, and at least one reinforcing portion 43 is located between at least one sampling pin 42 and the second segment 412, and at least two reinforcing portions 43 are provided on both sides of the second segment 412 in the first direction X. side.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

Ensemble d'échantillonnage (40), batterie (10) et dispositif électrique. L'ensemble d'échantillonnage (40) pour la batterie (10) comprend : une carte de circuit imprimé (41) utilisée pour collecter des paramètres électriques d'une pluralité d'éléments de batterie (21) agencés côte à côte dans une première direction, la carte de circuit imprimé (41) comprenant de premières sections (411) et une seconde section (412), les premières sections (411) s'étendant dans la première direction, et au moins une partie de la seconde section (412) croisant les premières sections (411) ; et des broches d'échantillonnage (42), la pluralité de broches d'échantillonnage (42) étant disposée sur la carte de circuit imprimé (41) à des intervalles dans la première direction, de telle sorte que la carte de circuit imprimé (41) acquiert des paramètres électriques au moyen des broches d'échantillonnage (42). Au moins une partie de la seconde section (412) croise les premières sections (411), de telle sorte que la seconde section (412) a une tolérance de déformation dans la première direction, et la tolérance de déformation peut supporter une déformation de la seconde section (412) dans la première direction, ce qui permet de réduire l'impact d'un choc de vibration sur la carte de circuit imprimé (41).
PCT/CN2023/088161 2022-04-28 2023-04-13 Ensemble d'échantillonnage, batterie et dispositif électrique WO2023207617A1 (fr)

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CN202221005731.1U CN217787321U (zh) 2022-04-28 2022-04-28 采样组件、电池及用电装置
CN202221005731.1 2022-04-28

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CN217787321U (zh) * 2022-04-28 2022-11-11 宁德时代新能源科技股份有限公司 采样组件、电池及用电装置

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CN216250997U (zh) * 2021-11-16 2022-04-08 宁德时代新能源科技股份有限公司 采样组件、电池及用电设备
CN217787321U (zh) * 2022-04-28 2022-11-11 宁德时代新能源科技股份有限公司 采样组件、电池及用电装置

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US20210194101A1 (en) * 2018-04-25 2021-06-24 Lg Chem, Ltd. Battery module and battery pack including the same
CN210629957U (zh) * 2019-08-21 2020-05-26 孚能科技(赣州)股份有限公司 印制电路板、动力电池包以及车辆
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