WO2024011438A1 - 支撑件、电池单体、电池、用电装置及装配方法 - Google Patents

支撑件、电池单体、电池、用电装置及装配方法 Download PDF

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Publication number
WO2024011438A1
WO2024011438A1 PCT/CN2022/105343 CN2022105343W WO2024011438A1 WO 2024011438 A1 WO2024011438 A1 WO 2024011438A1 CN 2022105343 W CN2022105343 W CN 2022105343W WO 2024011438 A1 WO2024011438 A1 WO 2024011438A1
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WIPO (PCT)
Prior art keywords
support member
central hole
clamping
battery
battery cell
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Application number
PCT/CN2022/105343
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English (en)
French (fr)
Inventor
郭继鹏
许虎
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.)
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Publication date
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
Priority to CN202280067934.XA priority Critical patent/CN118044036A/zh
Priority to PCT/CN2022/105343 priority patent/WO2024011438A1/zh
Publication of WO2024011438A1 publication Critical patent/WO2024011438A1/zh

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    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • 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
    • H01M10/04—Construction or manufacture in general

Definitions

  • the present application relates to the field of batteries, and in particular to a support member, a battery cell, a battery, an electrical device and an assembly method.
  • Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection.
  • battery technology is an important factor related to their development.
  • the battery cell includes a casing and an electrode assembly located in the casing.
  • the electrode assembly of the cylindrical battery is circularly wound, with a central hole formed in the center. If the strength of the central hole is not enough, in the later stages of the cycle, the expansion force of the electrode assembly will increase, causing the central hole to collapse, posing a greater safety risk. Therefore, a support member is provided in the center hole, and the assembly efficiency of the support member and the center hole seriously affects the overall assembly efficiency of the battery cell.
  • the present application provides a support member, a battery cell, a battery, an electrical device and an assembly method, which can improve the assembly efficiency of the support member.
  • the present application provides a support member for being disposed in a central hole of a rolled electrode assembly in a battery cell.
  • the support member includes a body, the body is disposed around an axis extending along a first direction, and the body has Two ends located opposite each other on a path around the axis, and an opening located between the two ends.
  • the support member is used for the battery cell.
  • the support member can be disposed in the center hole of the electrode assembly.
  • the support assembly supports the electrode assembly in the center hole to improve the electrode assembly.
  • the component is prone to collapse when the battery cell undergoes thermal runaway. Therefore, the safety performance of the battery cell can be improved by providing supports within the battery cell.
  • the support member includes a body, which is in the shape of a semicircle around an axis extending along the first direction.
  • the body has two ends and an opening located between the two ends.
  • the radial size of the support member can be reduced by reducing the size of the opening to facilitate feeding the support member into the central hole.
  • the radial size of the support member can be restored, so that the radial size of the support member increases, and the support member can provide better support to the center hole. Therefore, by providing the opening between the two ends on the support member, the assembly efficiency of the support member can be improved.
  • the support member further includes a clamping portion connected to at least one of the two ends and extending toward the inside of the body.
  • a clamping portion is provided on the support member, and the clamping portion extends toward the inside of the body, so as to change the size of the opening by clamping the clamping portion from the body, and change the diameter of the support member. direction size.
  • the clamping part is arranged in the body part, which on the one hand can reduce the total space occupied by the support part. On the other hand, when clamped from the body, the size of the outer surface of the support part will not be increased, making it easier to feed the support part into the central hole. Inside.
  • each clamping part is connected to each end part respectively.
  • two clamping parts are respectively connected to the two ends.
  • the distance between the two clamping parts can be changed, thereby changing the size of the opening and the support. radial size.
  • the clamping part is plate-shaped, and the two clamping parts are arranged parallel to each other.
  • the clamping portion is plate-shaped, which can reduce the size of the space occupied by the clamping portion within the body.
  • the central hole space occupied by the support member can be reduced, leaving enough space in the central hole for the circulation of active material or hot gas.
  • the two clamping parts are arranged parallel to each other to facilitate clamping of the two clamping parts, and the clamping part can be clamped from the side away from each other.
  • a deformation part is provided between the two clamping parts, and the deformation part is deformably arranged along the side-by-side direction of the two clamping parts, so as to change the radial size of the support through the deformation of the deformation part.
  • the deformation of the deformation part can change the distance between the two clamping parts, thereby changing the radial size of the support member, which can improve the performance of the support member. Insufficient deformation affects the supporting capacity of the support member.
  • the deformation part includes an expansion section configured to absorb the electrolyte in the battery cell and expand and deform to increase the distance between the two clamping parts.
  • the deformation portion includes an expansion section capable of absorbing liquid expansion deformation.
  • the expansion section can absorb the expansion and deformation of the electrolyte, thereby increasing the distance between the two clamping parts and increasing the radial size of the support member. , so that the support piece can better support the center hole.
  • the deformation part includes an elastic component that is reciprocally deformable along a side-by-side direction of the two clamping parts.
  • the distance between the two clamping parts can be increased through elastic deformation of the elastic component.
  • the distance between the two clamping parts can be reduced through the elastic deformation of the elastic component, thereby reducing the radial size of the support member, and the support member can be fed into the center more quickly inside the hole.
  • the elastic member can return to its original shape, thereby increasing the distance between the two clamping parts and increasing the radial size of the support member, so that The support piece better supports the center hole.
  • the clamping part has a connecting end and a free end, the connecting end and the end are connected to each other, and the free end is located in the body and spaced apart from the inner surface of the body.
  • the clamping part is connected to the end part through the connecting end, and the free end of the clamping part is spaced apart from the body. On the one hand, it can reduce the space occupied by the clamping part, and on the other hand, during the deformation process of the body, This can prevent sliding friction between the clamping part and the inner surface of the body from affecting the service life of the support.
  • the clamping portion and the end portion are connected with a smooth transition. Therefore, scratches on the inner wall surface of the center hole at the connection position between the clamping portion and the end portion can be improved.
  • the support further includes a flexible connection layer connected between the two ends.
  • the flexible connection layer can support the central hole at the opening, thereby improving the support capacity of the support member.
  • the flexible connection layer is integrally formed with the body portion. To improve the connection strength between the flexible connection layer and the body part.
  • the flexible connection layer is disposed separately from the body part, and the flexible connection layer is connected to the outer surface of the body part facing the central hole.
  • the flexible connection layer when the flexible connection layer and the body part are disposed separately, the flexible connection layer is connected to the outer surface of the body part, which facilitates the connection process between the flexible connection layer and the body part, and can increase the size to a certain extent.
  • the radial size of the support member improves the support capacity of the support member.
  • the distance between the two ends is greater than or equal to d*sin( ⁇ /2d), where d is the outer diameter of the support.
  • the distance between the two ends is no greater than d*sin( ⁇ /12), where d is the outer diameter of the support.
  • the elastic modulus of the support member ranges from 0.91 GPa to 200 GPa.
  • embodiments of the present application also provide a battery cell, including: an electrode assembly, in a rolled shape, with a central hole extending along a first direction; any of the above-mentioned support members in the first aspect, at least one support member The piece is located in the center hole and serves to support the center hole.
  • embodiments of the present application further provide a battery, including: a box; and any of the battery cells of the second aspect, the battery cells being arranged in the box.
  • embodiments of the present application further provide an electrical device, including a battery cell according to any one of the above second aspects, the battery cell being used to provide electric energy; or a battery according to any one of the above third aspect embodiments, the battery being Same as providing electrical energy.
  • embodiments of the present application also provide a method of assembling a battery cell, including:
  • the support member includes a body, the body is arranged around an axis extending along a first direction, and the body has two opposite ends along a path around the axis, and an opening located between the two ends;
  • the support member is released so that the two ends are moved away from each other, the radial size of the support member is increased, and at least part of the body portion is in contact with the inner surface of the electrode assembly toward the central hole.
  • 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 in an embodiment of the 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 support member provided by an embodiment of the present application.
  • Figure 6 is a schematic structural view of the support member in Figure 5 from another perspective
  • Figure 7 is a schematic structural diagram of a support member in another state according to an embodiment of the present application.
  • Figure 8 is a schematic structural view of the support member in Figure 7 from another perspective
  • Figure 9 is a schematic structural diagram of a support member provided by another embodiment of the present application.
  • Figure 10 is a schematic structural view of the support member in Figure 9 from another perspective
  • Figure 11 is a schematic structural diagram of a support member in another state according to another embodiment of the present application.
  • Figure 12 is a schematic structural view of the support member in Figure 11 from another perspective
  • Figure 13 is a schematic structural diagram of a support member provided by another embodiment of the present application.
  • Figure 14 is a schematic structural view of the support member in Figure 13 from another perspective
  • Figure 15 is a schematic structural diagram of a support member provided by yet another embodiment of the present application.
  • 100 battery cell 110 shell, 111 first wall, 112 second wall, 120 electrode assembly, 121 central hole, 122 positive ear, 123 negative ear, 124 electrode body, 130 support, 131 body, 131a end part, 131b opening, 132 clamping part, 133 deformation part, 134 flexible connection layer, 140 point electrode current collecting plate, 150 electrode terminal, 160 insulator, 170 liquid injection cap.
  • a first feature “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in direct contact. Indirect contact through intermediaries.
  • 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.
  • battery cells may include lithium ion secondary battery cells, lithium ion primary battery cells, lithium sulfur battery cells, sodium lithium ion battery cells, sodium ion battery cells or magnesium ion battery cells, etc.,
  • the embodiments of the present application are not limited to this.
  • the battery mentioned in the embodiments of this application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.
  • the battery mentioned in this application may include a battery module or a battery pack.
  • Batteries generally include a box for packaging one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.
  • the battery cell includes an electrode assembly and an electrolyte.
  • the electrode assembly includes a positive electrode piece, a negative electrode piece and a separator. Battery cells mainly rely on the movement of metal ions between the positive and negative electrodes to work.
  • the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer.
  • the positive electrode active material layer is coated on the surface of the positive electrode current collector;
  • the positive electrode current collector includes a positive electrode current collecting part and a positive electrode tab connected to the positive electrode current collecting part.
  • the positive electrode current collecting part The positive electrode active material layer is coated, and the positive electrode tab is not coated with the positive electrode active material layer.
  • the material of the cathode current collector can be aluminum, and the cathode active material layer includes cathode active materials.
  • the cathode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganate, etc.
  • the negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector includes a negative electrode current collecting part and a negative electrode tab connected to the negative electrode current collecting part, and the negative electrode current collecting part The negative electrode active material layer is coated, and the negative electrode tab is not coated with the negative electrode active material layer.
  • the material of the negative electrode current collector can be copper, and the negative electrode active material layer includes a negative electrode active material.
  • the negative electrode active material can be carbon or silicon.
  • the material of the isolator can be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene), etc.
  • a support member can be provided in the center hole of the electrode assembly of the battery cell, and the support member can provide support to the electrode assembly from the center hole, thereby alleviating the increase in internal resistance of the electrode assembly caused by the collapse of the electrode assembly. Thermal runaway problem occurs.
  • the outer diameter of the support member and the aperture of the central hole usually have a small difference, which makes it difficult to assemble the support member into the central hole.
  • the inventor designed a support member, battery cell, battery and electrical device after in-depth research.
  • the support member includes a body arranged around an axis extending along the first direction, and the body has two ends oppositely arranged on a path around the axis and an opening located between the two ends. That is, the support member is in the shape of an opening, and the radial size of the support member can be changed by changing the shape of the opening.
  • the radial size of the support member can be reduced by reducing the shape of the opening, so that the support member can be quickly assembled into the central hole.
  • Electrical devices can be vehicles, cell phones, portable devices, laptops, ships, spacecraft, electric toys and power tools, 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.
  • 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.
  • a battery cell refers to the smallest unit that constitutes a battery module or battery pack. Multiple battery cells may be connected in series and/or in parallel via electrode terminals for various applications.
  • the batteries mentioned in this application include battery modules or battery packs. Among them, multiple battery cells can be connected in series, parallel, or mixed. Hybrid refers to a mixture of series and parallel.
  • 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 includes a case 30 and battery cells (not shown), and the battery cells are accommodated in the case.
  • 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 is used to accommodate battery cells, and the box 30 can have various structures.
  • the box body 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
  • the 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.
  • Both the first box part 301 and the second box part 302 may also be hollow structures with one side open.
  • first box part 301 is covered with the open side of the second box part 302 to form a container.
  • Space box 30 can be in various shapes, such as cylinder, rectangular parallelepiped, etc.
  • 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, and the second box part 302 can also be called a lower box.
  • a battery there can be one or more 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 composed of mixed connections, 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 100 , and the plurality of battery cells 100 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 100 in the battery module 20 can be electrically connected through bus components to realize parallel, series or mixed connection of the multiple battery cells in the battery module 20 .
  • the battery cell 100 may include a lithium-ion battery cell, a sodium-ion battery cell, a magnesium-ion battery cell, etc., which are not limited in the embodiments of this application.
  • the following embodiments take a cylindrical battery cell as an example.
  • FIG. 4 is a schematic diagram of an exploded structure of a battery cell 100 provided by some embodiments of the present application.
  • the battery cell 100 includes a case 110 and an electrode assembly 120 and a support 130 located in the case 110 .
  • the electrode assembly 120 has a central hole 121 extending along the first direction Z; at least a part of the support member 130 is disposed in the central hole 121 .
  • the case 110 is a component used to form an internal environment of the battery cell 100 , wherein the formed internal environment can be used to accommodate the electrode assembly 120 , electrolyte (not shown in the figure), and other components.
  • the battery cell 100 may also include an end cap covering the opening of the casing 110.
  • the casing 110 and the end cap may be independent components.
  • An opening may be provided on the casing 110, and the end cap is used to cover the opening.
  • the end cover and the housing 110 can also be integrated. Specifically, the end cover and the housing 110 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 110, The end cap is then closed onto the housing 110 .
  • the housing 110 may be of various shapes and sizes, such as rectangular parallelepiped, cylinder, hexagonal prism, etc. Specifically, the shape of the housing 110 can be determined according to the specific shape and size of the electrode assembly 120 .
  • the housing 110 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 embodiments of the present application.
  • the housing 110 includes a top wall 111 and a bottom wall 112.
  • the bottom wall 112 can be electrically connected to one of the tabs (eg, the negative tab 123) of the electrode assembly 120 through the electrode current collecting plate 140.
  • the top wall 111 is provided with an electrode terminal 150, and the other tab (eg, the positive tab 122) of the electrode assembly 120 is electrically connected to the electrode terminal 150.
  • the electrode terminal 150 is sealingly connected to the top wall 111 through a sealing ring 160.
  • the electrode terminal 150 is provided with a liquid injection hole, and a liquid injection cap 170 is provided at the liquid injection hole.
  • the electrode assembly 120 is a component in the battery cell 100 where electrochemical reactions occur.
  • the electrode assembly 120 includes an electrode body 124 and tabs extending from the electrode body 124.
  • the electrode body 124 is formed by winding a positive electrode current collector, an insulating separator and a negative electrode current collector.
  • the central hole 121 is provided in the electrode body 124 , and the positive electrode current collector, the insulating separator and the negative electrode current collector are wound around the central hole 121 .
  • the electrode assembly 120 includes a pole piece, which includes a positive electrode piece and a negative electrode piece. The portion of the positive electrode piece that contains active material constitutes the positive electrode current collector, and the portion of the positive electrode piece that does not contain active material constitutes the positive electrode lug 122 .
  • the portion of the negative electrode sheet that contains active material constitutes the negative electrode current collector, and the portion of the negative electrode sheet that does not contain active material constitutes the negative electrode tab 123 .
  • the positive electrode tab 122 and the negative electrode tab 123 may be located together at one end of the electrode body 124 or respectively located at both ends of the electrode body 124.
  • the support member 130 can support the central hole 121 in the central hole 121 and thereby support the electrode assembly 120 .
  • the support member 130 may be a solid structure or a hollow structure.
  • the support member 130 may be supported on the inner wall surface of the electrode assembly 120 facing the central hole 121 , or the support member 130 may be spaced apart from the inner wall surface of the electrode assembly 120 facing the central hole 121 .
  • the support member 130 may be disposed close to an end of the electrode assembly 120 in the first direction Z, or the extension size of the support member 130 in the first direction Z is the same as the central hole.
  • the support member 130 may be made of a material with higher stiffness such as metal or ceramic to increase the structural rigidity of the support member 130 and increase the supporting force of the support member 130 . Alternatively, the material of the support member 130 can also be selected from other materials.
  • the extension size of the support member 130 in the first direction Z can be set according to actual needs, as long as the support member 130 can support the central hole 121 .
  • Figure 5 is a schematic structural diagram of a support member 130 provided by an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of the support member 130 in FIG. 5 from another perspective.
  • the support member 130 provided by the embodiment of the present application is used for the battery cell.
  • the support member 130 is used to support the electrode assembly in the central hole 121 of the electrode assembly of the battery cell.
  • the support 130 includes a body 131 , which is arranged around an axis extending along the first direction Z, and the body 131 has two ends 131 a that are oppositely arranged on a path around the axis, and an opening located between the two ends 131 a 131b.
  • the first direction Z is the axial direction of the central hole 121 , and the central hole 121 extends along the first direction Z.
  • the body 131 encloses a first through hole.
  • the body 131 may be provided with a second through hole, which is interconnected with the first through hole. By providing the second through hole, the structural strength of the body 131 can be reduced, so that the body 131 can be easily Deformation occurs.
  • the orthographic projection of the body 131 along the first direction Z is in the shape of a ring with an opening 131b. There are many ways to set the shape of the body 131.
  • the orthographic projection shape of the body 131 along the first direction Z can be a polygonal annular shape, a circular annular shape, an elliptical annular shape, etc. with an opening 131b.
  • the orthographic projection of the body 131 along the first direction Z is formed into a circular ring shape with the opening 131b, so that the shape of the body 131 better matches the shape of the central hole.
  • the material of the body 131 is a steel sheet (such as a stainless steel sheet), so that the body 131 has good support and elasticity.
  • the material of the body 131 includes plastic with elastic deformation ability (such as polymer plastic), so that the body 131 can elastically deform to change the size of the opening 131b.
  • FIG. 7 is a schematic structural diagram of a support member 130 in another state according to an embodiment of the present application.
  • FIG. 8 is a view of the support member 130 in FIG. 7 from another perspective. Schematic.
  • the size of the opening 131b of the support member 130 is larger in the natural state, and the radial size of the support member 130 is larger.
  • FIGS. 7 and 8 when the support member 130 is clamped and deformed, the size of the opening 131 b is reduced, and the radial size of the support member 130 is reduced.
  • the support member 130 is used for the battery cell 100.
  • the support member 130 can be disposed in the center hole 121 of the electrode body 124.
  • the support member 130 is in the center hole 121.
  • the electrode assembly 120 is supported internally to improve the problem that the electrode assembly 120 is prone to collapse when the battery cell 100 undergoes thermal runaway. Therefore, the safety performance of the battery cell 100 can be improved by providing the support 130 inside the battery cell 100 .
  • the support member 130 includes a body 131, which is in a semi-annular shape around an axis extending along the first direction Z.
  • the body 131 has two ends 131a and an opening 131b located between the two ends 131a.
  • the radial size of the support member 130 can be changed. Before the support member 130 extends into the central hole, as shown in FIGS. 7 and 8 , the radial size of the support member 130 can be reduced by reducing the size of the opening 131 b to facilitate the insertion of the support member 130 into the central hole 121 .
  • the radial size of the support member 130 can be restored, so that the radial size of the support member 130 is increased, and the support member 130 can provide better support to the central hole. . Therefore, by providing the opening 131b between the two ends 131a on the support member 130, the assembly efficiency of the support member 130 can be improved.
  • FIG. 9 is a schematic structural diagram of a support member 130 provided by another embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of the support member 130 in FIG. 9 from another perspective.
  • FIG. 11 is a schematic structural diagram of a support member 130 in another state provided by another embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of the support member 130 in FIG. 11 from another perspective.
  • the support member 130 further includes a clamping portion 132 , which is connected to at least one of the two ends 131 a and extends toward the inside of the body 131 . .
  • the clamping part 132 and the body 131 may be integrally cast.
  • the clamping part 132 and the body 131 may be integrally cast.
  • the clamping part 132 and the main body 131 are prepared separately, and then the clamping part 132 is connected to the end part 131a through adhesive glue or other means.
  • the extension size of the clamping portion 132 in the first direction Z can be smaller than the extension size of the body 131 in the first direction Z, so as to reduce the space size occupied by the clamping portion 132. .
  • the extension dimensions of the clamping portion 132 and the body 131 in the first direction Z are equal to simplify the structure of the support member 130 .
  • the extension dimension of the clamping portion 132 in the first direction Z is greater than the extension dimension of the body 131 in the first direction Z, which facilitates the clamping operation of the clamping portion 132 .
  • the embodiment of the present application takes as an example that the extension dimensions of the clamping portion 132 and the body 131 in the first direction Z are equal.
  • the clamping portion 132 on the support member 130 and extending toward the inside of the body 131, it is convenient to clamp the clamping portion 132 from the body 131 to change the size of the opening 131b and change the support member. 130 radial dimensions.
  • the clamping portion 132 is disposed in the body 131 , so that when clamped from the body 131 , the support member 130 can be easily sent into the central hole 121 .
  • each clamping part 132 is connected to each end part 131 a respectively.
  • the size and shape of the two clamping parts 132 may be the same or different, as long as the two clamping parts 132 are respectively connected to the two end parts 131a.
  • the two clamping parts 132 have the same shape and size, which facilitates the preparation and shaping of the support member 130 .
  • the two clamping parts 132 are arranged side by side along the third direction Y.
  • the two clamping parts 132 are respectively connected to the two end parts 131a.
  • the distance between the two clamping parts 132 can be changed, thereby changing the opening 131b. and the radial dimensions of the support 130.
  • the clamping part 132 is plate-shaped, and the two clamping parts 132 are arranged parallel to each other.
  • the clamping portion 132 is plate-shaped, which can reduce the size of the space occupied by the clamping portion 132 in the body 131 .
  • the space occupied by the support member 130 in the central hole 121 can be reduced, so that there is enough space in the central hole 121 for the circulation of active material or hot gas.
  • the two clamping parts 132 are arranged parallel to each other to facilitate clamping of the two clamping parts 132.
  • the clamping part 132 can be clamped from the side away from each other.
  • a clamp Before the support member 130 is inserted into the central hole 121 , a clamp may be used to clamp the two clamping parts 132 to reduce the distance between the two clamping parts 132 and reduce the radial size of the support member 130 .
  • the clamp can be released, so that the two clamping parts 132 move away from each other under the elastic force of the support member 130 itself, thereby increasing the distance between the two clamping parts 132 and increasing the support.
  • the radial size of the member 130 enables the support member 130 to provide better support to the central hole 121.
  • Figure 13 is a schematic structural view of a support member 130 provided by yet another embodiment of the present application.
  • Figure 14 is a schematic structural view of the support member 130 in Figure 13 from another perspective.
  • a deformation part 133 is provided between the two clamping parts 132 , and the deformation part 133 is along the side-by-side direction of the two clamping parts 132 (ie, the third direction Y ) can be deformed to change the radial size of the support member 130 through the deformation of the deformation portion 133 .
  • the deformation of the deformation part 133 can change the distance between the two clamping parts 132, thereby changing the radial size of the support member 130, This can improve the support ability of the support member 130 that is affected by the deformation of the support member 130 not being in place.
  • the deformation part 133 can be arranged in various ways.
  • the deformation part 133 may be material expansion and deformation, or the deformation part 133 may be elastic deformation.
  • the extension dimension of the deformation part 133 in the first direction Z is smaller than the extension dimension of the clamping part 132 in the first direction Z. As long as it can be increased under the deformation of the deformation part 133, The distance between the two clamping parts 132 is sufficient.
  • the number of deformation portions 133 may be one, or the number of deformation portions 133 may be multiple, and the plurality of deformation portions 133 are spaced apart along the first direction Z.
  • the extension size of the deformation part 133 in the second direction X may be the same as or different from the clamping part 132 .
  • the extension size of the deformation part 133 in the second direction can provide space for the deformation of the deformation part 133 in the second direction X.
  • the extension size of the deformation part 133 in the second direction X may be equal to the extension size of the clamping part 132 in the second direction X.
  • the deformation part 133 includes an expansion section, which is configured to absorb the electrolyte in the battery cell 100 and expand and deform to increase the size of the two clamping sections. The distance between parts 132.
  • the deformation portion 133 includes an expansion section capable of absorbing liquid expansion deformation.
  • the expansion section can absorb the expansion and deformation of the electrolyte, thereby increasing the distance between the two clamping parts 132 and increasing the size of the support member 130 The radial size enables the support member 130 to better support the central hole 121.
  • the material of the expansion section can specifically be expansion glue, water-absorbent resin, etc.
  • the material of the expansion section includes, for example, oriented polystyrene.
  • the deformation part 133 includes an elastic component that is reciprocally deformable along the side-by-side direction of the two clamping parts 132 .
  • the distance between the two clamping parts 132 can be increased through elastic deformation of the elastic component.
  • the distance between the two clamping parts 132 can be reduced through the elastic deformation of the elastic component, thereby reducing the radial size of the support member 130, and the support can be more quickly
  • the piece 130 is fed into the central hole 121.
  • the elastic member can return to its original shape, thereby increasing the distance between the two clamping parts 132 and increasing the diameter of the support member 130.
  • the directional size allows the support member 130 to better support the central hole 121 .
  • the elastic component may be a spring or elastic rubber.
  • the distance between the two clamping parts 132 is larger, and the radial size of the support member 130 is larger.
  • the radial size of the support member 130 is close to the aperture of the central hole 121 .
  • the elastic component can be compressed, so that the distance between the two clamping parts 132 is reduced, and the radial size of the support member 130 is reduced, which facilitates the rapid assembly of the support member 130 into the central hole 121.
  • the compression component returns to its natural state, and the radial size of the support member 130 increases, thereby providing better support to the central hole 121.
  • the clamping portion 132 has a connecting end and a free end.
  • the connecting end and the end portion 131a are connected to each other, and the free end is located in the body 131 and connected with the inner surface of the body 131. Interval settings.
  • the clamping part 132 is connected to the end part 131a through the connecting end, and the free end of the clamping part 132 is spaced apart from the body 131. On the one hand, it can reduce the space occupied by the clamping part 132, and on the other hand, the space occupied by the clamping part 132 can be reduced. During the deformation process of the support member 131, sliding friction between the clamping portion 132 and the inner surface of the body 131 can be avoided to affect the service life of the support member 130.
  • the clamping portion 132 and the end portion 131a are connected in a smooth transition. Therefore, scratches on the inner wall surface of the central hole 121 at the connection position of the clamping portion 132 and the end portion 131a can be improved.
  • the clamping portion 132 and the outer surface of the end portion 131a are connected in a smooth transition, and the clamping portion 132 and the outer surface of the end portion 131a can be connected in a smooth transition through rounding.
  • the outer surfaces of the clamping portion 132 and the end portion 131 a refer to the surface of the support member 130 facing the central hole 121 when it is located in the central hole 121 .
  • the support member 130 further includes a flexible connection layer 134, and the flexible connection layer 134 is connected between the two ends 131a.
  • the material of the flexible connection layer 134 may be, for example, an insulating material such as plastic.
  • the material of the flexible connection layer 134 may include polyvinyl chloride, polystyrene, etc.
  • the flexible connection layer 134 is, for example, in the shape of a film, so that the flexible connection layer 134 can be flexibly deformed.
  • the flexible connection layer 134 can be received in the body 131 through the opening 131b.
  • the flexible connection layer 134 can extend from the body 131 and connect between the two ends 131a.
  • the flexible connection layer 134 can provide a limit to the two ends 131 a to prevent excessive size between the two ends 131 a from causing extrusion deformation on the inner wall of the central hole 121 .
  • the flexible connection layer 134 can support the central hole 121 at the opening 131b, thereby improving the support capacity of the support member 130.
  • the flexible connection layer 134 and the body 131 are integrally formed.
  • the flexible connection layer 134 can be integrally cast with the body 131 .
  • the thickness of the flexible connection layer 134 is smaller than the wall thickness of the body 131 , so that the flexible connection layer 134 has good flexibility.
  • the integral molding of the flexible connection layer 134 and the body 131 can improve the connection strength between the flexible connection layer 134 and the body 131.
  • the flexible connection layer 134 is provided separately from the body 131 , and the flexible connection layer 134 is connected to the outer surface of the body 131 facing the central hole 121 .
  • the flexible connection layer 134 when the flexible connection layer 134 and the body 131 are arranged separately, the flexible connection layer 134 is connected to the outer surface of the body 131, which facilitates the connection process between the flexible connection layer 134 and the body 131, and can be carried out in a certain manner.
  • the radial size of the support member 130 is increased to a certain extent to improve the supporting capacity of the support member 130 .
  • the distance between the two ends 131a is greater than or equal to 0.5 mm. In some embodiments, as shown in FIG. 14 , the distance between the two ends 131 a is greater than or equal to d*sin( ⁇ /2d), where d is the outer diameter of the support 130 .
  • d refers to the outer diameter of the support member 130 when in use, that is, the outer diameter when the support member 130 and at least part of the inner wall surface of the central hole 121 are in contact with each other. At this time, the outer diameter of the support member 130 is close to the diameter of the central hole 121 . In some embodiments, d may also directly equal the aperture of the central hole 121 .
  • the distance between the two ends 131a is no greater than ⁇ d/4. In some embodiments, the distance between the two ends 131a is no greater than d*sin( ⁇ /12).
  • d can be defined as the outer diameter of the support member 130 as mentioned above or d can be the aperture of the central hole 121 .
  • the elastic modulus of the support member 130 ranges from 0.91 GPa to 200 GPa. This enables the support member 130 to have good deformation and recovery deformation capabilities.
  • the elastic modulus of the support member 130 may be the elastic modulus of the material of the support member 130 itself, or the elastic modulus of the support member 130 may also be the elastic modulus of the entire support member 130 after molding.
  • the embodiments of the present application also provide a battery cell, including an electrode assembly, in a rolled shape, with a central hole penetrating along the first direction; the support member of any of the above embodiments, at least one The support is located in and supports the center hole.
  • the embodiment of the present application also provides a battery, including a box 300; and the battery cell 100 of any of the above embodiments, and the battery cell 100 is located in the box 300.
  • the embodiments of the present application also provide an electrical device, including the battery unit 100 of any of the above embodiments, and the battery unit 100 is used to provide electric energy; or including the battery of any of the above embodiments. , the battery is used to provide electrical energy.
  • the powered device can be any of the aforementioned devices or systems that use batteries.
  • the embodiments of the present application also provide a method of assembling a battery cell, including:
  • Step S01 Provide a support member, which includes a body arranged around an axis extending in a first direction, and the body has two opposite ends along a path surrounding the axis, and an opening located between the two ends.
  • the support member may be the support member of any of the above embodiments.
  • Step S02 Clamp the support member so that the two ends are close to each other, and the radial size of the support member is reduced.
  • the radial size of the support may be reduced by clamping the two clamping parts to bring the two ends closer to each other in step S02.
  • Step S03 Arrange the support member with reduced radial size in the central hole of the electrode assembly, and the central hole extends along the first direction.
  • Step S04 Release the support member so that the two ends move away from each other, the radial size of the support member increases, and at least part of the body portion is in contact with the inner surface of the electrode assembly toward the central hole.
  • the support member may also include a clamping part.
  • a clamp may be used to clamp the clamping part, so that the support member As the two ends come closer, the radial size of the support decreases.
  • the support member is controlled to move into the central hole by moving the clamp.
  • the clamp can be released, and then the clamping part can be released, and the support member can be released, so that the clamping parts move away from each other under the action of the elastic force of the support member itself, and the radial size of the support member increases, at least part of the body part and the electrode The components are connected in contact with the inner surface towards the central hole.
  • the radial size of the support member is first reduced, and then the support member is arranged in the central hole.
  • the support member after the radial size is reduced has a large diameter difference with the central hole, which is convenient for The mutual alignment of the supporting member and the central hole enables the supporting member to be quickly placed in the central hole.
  • the two ends are moved away from each other by releasing the support member, the opening is enlarged, the radial size of the support member can be increased, and the supporting capacity of the support member can be improved.
  • inventions of the present application provide a support member 130 for the battery cell 100 and supporting the electrode assembly 120 in the central hole 121 of the electrode assembly 120 in the battery cell 100 .
  • the support member 130 includes The body 131 is arranged around an axis extending along the first direction Z, and the body 131 has two end portions 131a arranged oppositely on a path around the axis, and an opening 131b located between the two end portions 131a.
  • the support member 130 also includes two clamping parts 132 , and each clamping part 132 is connected to each end part 131 a respectively.
  • the clamping part 132 is plate-shaped, and the two clamping parts 132 are arranged parallel to each other.
  • the clamping portion 132 has a connecting end and a free end.
  • the connecting end and the end portion 131a are connected to each other.
  • the free end is located in the body 131 and spaced apart from the inner surface of the body 131 .
  • the clamping portion 132 and the end portion 131a are connected in a smooth transition.
  • the support member 130 also includes a flexible connection layer 134 connected between the two ends 131a.

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  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

本申请公开了一种支撑件、电池单体、电池、用电装置及装配方法，支撑件用于电池单体、并由电池单体中电极组件的中心孔内支撑电极组件，支撑件包括本体，本体环绕沿第一方向延伸的轴线设置，且本体具有在环绕轴线的路径上相对设置的两个端部、及位于两个端部之间的开口。通过在支撑件上设置位于两个端部之间的开口，能够提高支撑件的装配效率。

Description

支撑件、电池单体、电池、用电装置及装配方法 技术领域
本申请涉及电池领域，特别涉及一种支撑件、电池单体、电池、用电装置及装配方法。
背景技术
节能减排是汽车产业可持续发展的关键，电动车辆由于其节能环保的优势成为汽车产业可持续发展的重要组成部分。对于电动车辆而言，电池技术又是关乎其发展的一项重要因素。
电池单体包括壳体及位于壳体内的电极组件。其中，圆柱电池的电极组件呈圆形卷绕状，并在中心形成中心孔。若中心孔的强度不够，在循环后期，电极组件膨胀力增大会导致中心孔发生坍塌，存在较大安全风险。因此会在中心孔内设置支撑件，支撑件和中心孔的装配效率严重影响电池单体的整体装配效率。
发明内容
鉴于上述问题，本申请提供一种支撑件、电池单体、电池、用电装置及装配方法，能够提高支撑件的装配效率。
第一方面，本申请提供了一种支撑件，用于设置于电池单体中卷绕状电极组件的中心孔内，支撑件包括本体，本体环绕沿第一方向延伸的轴线设置，且本体具有在环绕轴线的路径上相对设置的两个端部、及位于两个端部之间的开口。
本申请实施例的技术方案中，支撑件用于电池单体，在支撑件的使用过程中，支撑件可以设置于电极组件的中心孔内，支撑组件在中心孔内支撑电极组件，以改善电极组件在电池单体发生热失控时易坍塌的问题，因此通过在电池单体内设置支撑件能够提高电池单体的安全性能。
此外，支撑件包括本体，本体环绕沿第一方向延伸的轴线呈半环状，本体具有两个端部及位于两个端部之间的开口，通过改变开口的尺寸，可以改变支撑件的径向尺寸。在支撑件伸入中心孔之前，可以通过减小开口的尺寸而减小支撑件的径向尺寸，便于将支撑件送入中心孔内。支 撑件伸入中心孔后，可以恢复支撑件的径向尺寸，使得支撑件的径向尺寸增大，支撑件能够向中心孔提供更好的支撑。因此，通过在支撑件上设置位于两个端部之间的开口，能够提高支撑件的装配效率。
在一些实施例中，支撑件还包括夹持部，夹持部连接于两个端部中的至少一者并朝向本体内延伸成型。
在这些在一些实施方式中实施例中，通过在支撑件上设置夹持部，且夹持部朝向本体内延伸，便于从本体内夹持夹持部而改变开口尺寸，并改变支撑件的径向尺寸。夹持部设置于本体部内，一方面能够减小支撑件占据的总空间尺寸，另一方面从本体内夹持时，不会增大支撑件外表面的尺寸，便于将支撑件送入中心孔内。
在一些实施例中，夹持部为两个，各夹持部分别连接于各端部。
在这些实施例中，两个夹持部分别连接于两个端部，通过改变两个夹持部之间的距离，能够改变两个端部之间的距离，从而改变开口的大小和支撑件的径向尺寸。
在一些实施例中，夹持部呈板状，且两个夹持部相互平行设置。
在这些实施例中，夹持部呈板状，能够减小夹持部在本体内占据的空间尺寸。当支撑件用于电池单体时，能够减小支撑件占据的中心孔空间，使得中心孔内留有足够的用于流通活性物质或热气的空间。两个夹持部相互平行设置，便于对两个夹持部进行夹持，可以从夹持部相互远离的一侧对夹持部进行夹持操作。
在一些实施例中，两个夹持部之间设置有变形部，变形部沿两个夹持部的并排方向可变形设置，以通过变形部的变形改变支撑件的径向尺寸。
在这些实施例中，通过在两个夹持部之间设置变形部，使得变形部的变形能够改变两个夹持部之间的距离，进而改变支撑件的径向尺寸，能够改善由于支撑件形变不到位而影响支撑件的支撑能力。
在一些实施例中，变形部包括膨胀段，膨胀段被配置为能够吸收所述电池单体内的电解液并膨胀变形，以增大两个夹持部之间的间距。
在这些实施例中，变形部包括膨胀段，膨胀段能够吸收液体膨胀变形。 例如当支撑件设置于中心孔内后，向电池单体注电解液时，膨胀段能够吸收电解液膨胀变形，从而增大两个夹持部之间的距离，增大支撑件的径向尺寸，使得支撑件能够更好地支撑中心孔。
在一些实施例中，变形部包括沿两个夹持部的并排方向可往复变形的弹性部件。
在这些实施例中，通过弹性部件的弹性变形，可以增大两个夹持部之间的距离。例如，在支撑件置于中心孔之前，可以通过弹性部件的弹性变形减小两个夹持部之间的距离，从而减小支撑件的径向尺寸，可以更加快速地将支撑件送入中心孔内。当支撑件位于中心孔内后，在弹性部件的弹性恢复力的作用下，弹性部件能够恢复原状，从而能够增大两个夹持部之间的距离，增大支撑件的径向尺寸，使得支撑件能够更好地支撑中心孔。
在一些实施例中，夹持部具有连接端和自由端，连接端和端部相互连接，自由端位于本体内并与本体的内表面间隔设置。
在这些实施例中，夹持部通过连接端连接于端部，夹持部的自由端与本体间隔设置，一方面能够减小夹持部占据的空间，另一方面在本体的变形过程中，能够避免夹持部和本体的内表面之间出现滑动摩擦而影响支撑件的使用寿命。
在一些实施例中，夹持部和端部圆滑过渡连接。因此能够改善夹持部和端部的连接位置处对中心孔内壁面的剐蹭。
在一些实施例中，支撑件还包括柔性连接层，柔性连接层连接于两个端部之间。
在这些实施例中，通过设置柔性连接层，使得柔性连接层能够在开口处支撑中心孔，提高支撑件的支撑能力。
在一些实施例中，柔性连接层与本体部一体成型。以提高柔性连接层和本体部之间的连接强度。
在一些实施例中，柔性连接层与本体部分体设置，且柔性连接层连接于本体部朝向中心孔的外表面。
在这些实施例中，当柔性连接层和本体部分体设置时，柔性连接层连接 于本体部的外表面，便于柔性连接层和本体部之间连接工艺的进行，且能够在一定程度上增大支撑件的径向尺寸，提高支撑件的支撑能力。
在一些实施例中，两个端部之间的距离大于或等于d*sin(π/2d)，d为支撑件的外径。
在这些实施例中，两个端部之间的距离在上述范围之内时，能够改善由于两个端部之间的尺寸过小，使得支撑件的变径空间过小，不利于支撑件快速送入中心孔内。
在一些实施例中，两个端部之间的距离不大于d*sin(π/12)，其中，d为支撑件的外径。
在这些实施例中，两个端部之间的距离在上述范围之内时，能够改善由于两个端部之间的距离过大而影响支撑件的支撑能力。
在一些实施例中，支撑件的弹性模量为0.91GPa～200GPa。
第二方面，本申请实施例还以供一种电池单体，包括：电极组件，呈卷绕状，具有沿第一方向延伸的中心孔；上述任一第一方面的支撑件，至少一个支撑件位于中心孔并用于支撑中心孔。
第三方面，本申请实施例还提供一种电池，包括：箱体；及上述任一第二方面的电池单体，电池单体设置于箱体内。
第四方面，本申请实施例还提供一种用电装置，包括上述任一第二方面的电池单体，电池单体用于提供电能；或者包括上述任一第三方面实施例的电池，电池同于提供电能。
第五方面，本申请实施例还提供一种电池单体的装配方法，包括：
提供一种支撑件，支撑件包括本体，本体环绕沿第一方向延伸的轴线设置，且本体具有在环绕轴线的路径上相对的两端部、及位于两端部之间的开口；
夹持支撑件以使两个端部相互靠近，支撑件的径向尺寸减小；
将径向尺寸减小后的支撑件设置于电极组件的中心孔内，中心孔沿第一方向延伸；
释放支撑件以使两端部相互远离，支撑件的径向尺寸增大，至少部分本 体部与电极组件朝向中心孔的内表面接触连接。
上述说明仅是本申请技术方案的概述，为了能够更清楚了解本申请的技术手段，而可依照说明书的内容予以实施，并且为了让本申请的上述和其它目的、特征和优点能够更明显易懂，以下特举本申请的具体实施方式。
附图说明
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本申请的限制。而且在整个附图中，用相同的参考符号表示相同的部件。在附图中：
图1是本申请一实施例提供的车辆的结构示意图；
图2是本申请一实施例提供的电池包的结构示意图；
图3是申请一实施例提供的一种电池模块的结构示意图；
图4是本申请一实施例提供的一种电池单体的分解结构示意图；
图5是本申请一实施例提供的一种支撑件的结构示意图；
图6是图5中支撑件在另一视角下的结构示意图；
图7是本申请一实施例提供的一种支撑件在另一状态下的结构示意图；
图8是图7中支撑件在另一视角下的结构示意图；
图9是本申请另一实施例提供的一种支撑件的结构示意图；
图10是图9中支撑件在另一视角下的结构示意图；
图11是本申请另一实施例提供的一种支撑件在另一状态下的结构示意图；
图12是图11中支撑件在另一视角下的结构示意图；
图13是本申请又一实施例提供的一种支撑件的结构示意图；
图14是图13中支撑件在另一视角下的结构示意图；
图15是是本申请还一实施例提供的一种支撑件的结构示意图。
具体实施方式中的附图标号如下：
1车辆，10电池，11控制器，12马达；
20电池模块；
30箱体，301第一箱体部；302第二箱体部；
100电池单体，110壳体，111第一壁部，112第二壁部，120电极组件，121中心孔，122正极耳，123负极耳，124电极主体，130支撑件，131本体，131a端部，131b开口，132夹持部，133变形部件，134柔性连接层，140点电极集流盘，150电极端子，160绝缘件，170注液帽。
具体实施方式
下面将结合附图对本申请技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本申请的技术方案，因此只作为示例，而不能以此来限制本申请的保护范围。
需要注意的是，除非另有说明，本申请实施例使用的技术术语或者科学术语应当为本申请实施例所属领域技术人员所理解的通常意义。
在本申请实施例的描述中，技术术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请实施例和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。
此外，技术术语“第一”、“第二”等仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。在本申请实施例的描述中，“多个”的含义是两个以上，除非另有明确具体的限定。
在本申请实施例的描述中，除非另有明确的规定和限定，技术术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；也可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具 体情况理解上述术语在本申请实施例中的具体含义。
在本申请实施例的描述中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。
目前，从市场形势的发展来看，动力电池的应用越加广泛。动力电池不仅被应用于水力、火力、风力和太阳能电站等储能电源系统，而且还被广泛应用于电动自行车、电动摩托车、电动汽车等电动交通工具，以及军事装备和航空航天等多个领域。随着动力电池应用领域的不断扩大，其市场的需求量也在不断地扩增。
本申请中，电池单体可以包括锂离子二次电池单体、锂离子一次电池单体、锂硫电池单体、钠锂离子电池单体、钠离子电池单体或镁离子电池单体等，本申请实施例对此并不限定。
本申请的实施例所提到的电池是指包括一个或多个电池单体以提供更高的电压和容量的单一的物理模块。例如，本申请中所提到的电池可以包括电池模块或电池包等。电池一般包括用于封装一个或多个电池单体的箱体。箱体可以避免液体或其他异物影响电池单体的充电或放电。
电池单体包括电极组件和电解液，电极组件包括正极极片、负极极片和隔离件。电池单体主要依靠金属离子在正极极片和负极极片之间移动来工作。正极极片包括正极集流体和正极活性物质层，正极活性物质层涂覆于正极集流体的表面；正极集流体包括正极集流部和连接于正极集流部的正极极耳，正极集流部涂覆有正极活性物质层，正极极耳未涂覆正极活性物质层。以锂离子电池为例，正极集流体的材料可以为铝，正极活性物质层包括正极活性物质，正极活性物质可以为钴酸锂、磷酸铁锂、三元锂或锰酸锂等。负极极片包括负极集流体和负极活性物质层，负极活性物质层涂覆于负极集流体的表面；负极集流体包括负极集流部和连接于负极集流部的负极极耳，负极集流部涂覆有负极活性物质层，负极极耳未涂覆负极活性物质层。负极 集流体的材料可以为铜，负极活性物质层包括负极活性物质，负极活性物质可以为碳或硅等。隔离件的材质可以为PP(polypropylene，聚丙烯)或PE(polyethylene，聚乙烯)等。
本发明人注意到，电池单体中的电极组件由于包括由极片卷绕形成的中心孔，中心孔会降低电极组件的结构强度。在使用过程中产生高温时，由于中心孔的存在可能导致电极组件变形，中心孔塌陷容易导致电极组件的内阻增大，使电池单体性能存在较大风险。为了缓解这一技术问题，可以在电池单体的电极组件中心孔内设置支撑件，通过支撑件由中心孔内向电极组件提供支撑，进而可以缓解由电极组件坍塌导致电极组件内阻增大，而出现的热失控问题。
但是为了提高支撑件的支撑能力，支撑件的外径尺寸和中心孔的孔径通常相差较小，这就导致支撑件难以装配入中心孔内。
基于以上考虑，为了提高支撑件和电池单体之间的装配效率，发明人经过深入研究，设计了一种支撑件、电池单体、电池和用电装置。
在这样的支撑件中，支撑件包括环绕沿第一方向延伸的轴线设置的本体，本体具有在环绕轴线的路径上相对设置的两个端部及位于两个端部之间的开口。即支撑件呈开口状，通过改变开口的形状可以改变支撑件的径向尺寸。在装配支撑件时，可以通过减小开口的形状而减小支撑件的径向尺寸，使得支撑件能够快速装配于中心孔内。
本申请实施例描述的技术方案适用于电池单体、电池以及使用电池的用电装置。
用电装置可以是车辆、手机、便携式设备、笔记本电脑、轮船、航天器、电动玩具和电动工具等等。车辆可以是燃油汽车、燃气汽车或新能源汽车，新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等；航天器包括飞机、火箭、航天飞机和宇宙飞船等等；电动玩具包括固定式或移动式的电动玩具，例如，游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等；电动工具包括金属切削电动工具、研磨电动工具、装配电动工具和铁道用电动工具，例如，电钻、电动砂轮机、电动扳手、电动螺丝刀、电锤、冲击电 钻、混凝土振动器和电刨等等。本申请实施例对上述用电装置不做特殊限制。
应理解，本申请实施例描述的技术方案不仅仅局限适用于上述所描述的电池和用电设备，还可以适用于所有包括箱体的电池以及使用电池的用电设备，但为描述简洁，下述实施例均以电动车辆为例进行说明。
请参照图1，图1为本申请一些实施例提供的车辆1的结构示意图。车辆1可以为燃油汽车、燃气汽车或新能源汽车，新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等。车辆1的内部设置有电池10，电池10可以设置在车辆1的底部或头部或尾部。电池10可以用于车辆1的供电，例如，电池10可以作为车辆1的操作电源。车辆1还可以包括控制器11和马达12，控制器11用来控制电池10为马达12供电，例如，用于车辆1的启动、导航和行驶时的工作用电需求。
在本申请一些实施例中，电池10不仅可以作为车辆1的操作电源，还可以作为车辆1的驱动电源，代替或部分地代替燃油或天然气为车辆1提供驱动动力。
为了满足不同的使用电力需求，电池10可以包括多个电池单体，电池单体是指组成电池模块或电池包的最小单元。多个电池单体可经由电极端子而被串联和/或并联在一起以应用于各种应用场合。本申请中所提到的电池包括电池模块或电池包。其中，多个电池单体之间可以串联或并联或混联，混联是指串联和并联的混合。本申请的实施例中多个电池单体可以直接组成电池包，也可以先组成电池模块20，电池模块20再组成电池包。
图2示出了本申请一实施例的电池10的结构示意图。
如图2所示，电池包括箱体30和电池单体(图未示出)，电池单体容纳于箱体内。
箱体30可以是单独的长方体或者圆柱体或球体等简单立体结构，也可以是由长方体或者圆柱体或球体等简单立体结构组合而成的复杂立体结构，本申请实施例对此并不限定。箱体30的材质可以是如铝合金、铁合金等合金材料，也可以是如聚碳酸酯、聚异氰脲酸酯泡沫塑料等高分子材料，或者是如玻璃纤维加环氧树脂的复合材料，本申请实施例对此也并不限定。
箱体用于容纳电池单体，箱体30可以是多种结构。在一些实施例中，箱体可以包括第一箱体部301和第二箱体部302，第一箱体部301和第二箱体部302相互盖合，第一箱体部301和第二箱体部302共同限定出用于容纳电池单体的容纳空间。第二箱体部302可以是一端开口的空心结构，第一箱体部301为板状结构，第一箱体部301盖合于第二箱体部302的开口侧，以形成具有容纳空间的箱体。第一箱体部301和第二箱体部302也均可以是一侧开口的空心结构，第一箱体部301的开口侧盖合于第二箱体部302的开口侧，以形成具有容纳空间的箱体30。当然，第一箱体部301和第二箱体部302可以是多种形状，比如，圆柱体、长方体等。
为提高第一箱体部301和第二箱体部302连接后的密封性，第一箱体部301和第二箱体部302之间也可以设置密封件，比如，密封胶、密封圈等。
假设第一箱体部301盖合于第二箱体部302的顶部，第一箱体部301亦可称之为上箱盖，第二箱体部302亦可称之为下箱体。
在电池中，电池单体可以是一个，也可以是多个。若电池单体为多个，多个电池单体之间可串联或并联或混联，混联是指多个电池单体中既有串联又有并联。多个电池单体之间可直接串联或并联或混联在一起，再将多个电池单体构成的整体容纳于箱体30内；当然，也可以是多个电池单体先串联或并联或混联组成电池模块20，多个电池模块20再串联或并联或混联形成一个整体，并容纳于箱体30内。
图3示出了本申请一实施例的电池模块20的结构示意图。
在一些实施例中，如图3所示，电池单体100为多个，多个电池单体100先串联或并联或混联组成电池模块20。多个电池模块20再串联或并联或混联形成一个整体，并容纳于箱体内。
电池模块20中的多个电池单体100之间可通过汇流部件实现电连接，以实现电池模块20中的多个电池单体的并联或串联或混联。
本申请中，电池单体100可以包括锂离子电池单体、钠离子电池单体或镁离子电池单体等，本申请实施例对此并不限定。但为描述简洁，下述实 施例均以圆柱形电池单体为例进行说明。
图4为本申请一些实施例提供的电池单体100的分解结构示意图。
如图4至图8所示，电池单体100包括壳体110和位于壳体110内的电极组件120和支撑件130。电极组件120具有沿第一方向Z延伸的中心孔121；支撑件130的至少一部分设置于中心孔121内。
壳体110是用于形成电池单体100的内部环境的组件，其中，形成的内部环境可以用于容纳电极组件120、电解液(在图中未示出)以及其他部件。电池单体100还可以包括盖设于壳体110开口处的端盖，壳体110和端盖可以是独立的部件，可以于壳体110上设置开口，通过在开口处使端盖盖合开口以形成电池单体100的内部环境。不限地，也可以使端盖和壳体110一体化，具体地，端盖和壳体110可以在其他部件入壳前先形成一个共同的连接面，当需要封装壳体110的内部时，再使端盖盖合壳体110。壳体110可以是多种形状和多种尺寸的，例如长方体形、圆柱体形、六棱柱形等。具体地，壳体110的形状可以根据电极组件120的具体形状和尺寸大小来确定。壳体110的材质可以是多种，比如，铜、铁、铝、不锈钢、铝合金、塑胶等，本申请实施例对此不作特殊限制。
壳体110包括顶壁111和底壁112，底壁112可以通过电极集流盘140与电极组件120的其中一个极耳(例如负极耳123)电连接。顶壁111设置有电极端子150，电极组件120的另一极耳(例如正极耳122)与电极端子150电连接。电极端子150通过密封圈160密封连接于顶壁111，电极端子150上设置有注液孔，注液孔处设置有注液帽170。
电极组件120是电池单体100中发生电化学反应的部件。电极组件120包括电极主体124和由电极主体124伸出的极耳，电极主体124由正极集流体、绝缘隔膜和负极集流体卷绕形成。中心孔121设置于电极主体124，正极集流体、绝缘隔膜和负极集流体环绕中心孔121卷绕设置。电极组件120包括极片，极片包括正极片和负极片，正极片上具有活性物质的部分构成正极集流体，正极片上不具有活性物质的部分构成正极耳122。负极片上具有活性物质的部分构成负极集流体，负极片上不具有活性物质的部分构成负极耳123。正极耳122和负极耳123可以共同位于电极主体124的一端 或是分别位于电极主体124的两端。
支撑件130在中心孔121内能够支撑中心孔121，进而支撑电极组件120。支撑件130可以为实心结构或者空心结构。支撑件130可以支撑于电极组件120朝向中心孔121的内壁面，或者支撑件130可以与电极组件120朝向中心孔121的内壁面间隔设置。支撑件130可以靠近电极组件120在第一方向Z上的端部设置，或者支撑件130在第一方向Z上的延伸尺寸与中心孔相同。支撑件130的材料可以选用金属或陶瓷等刚度较高的材料，以提高支撑件130的结构刚度，提高支撑件130的支撑力。或者，支撑件130的材料也可以选用其他材料，支撑件130在第一方向Z上的延伸尺寸可以根据实际需求设置，只要支撑件130能够支撑中心孔121即可。
请参阅图5和图6，图5是本申请实施例提供的一种支撑件130的结构示意图。图6是图5中的支撑件130在另一视角下的结构示意图。
如图5和图6所示，本申请实施例提供的支撑件130用于电池单体，如上所述支撑件130用于在电池单体的电极组件的中心孔121内支撑电极组件。支撑件130包括本体131，本体131环绕沿第一方向Z延伸的轴线设置，且本体131具有在环绕轴线的路径上相对设置的两个端部131a、及位于两个端部131a之间的开口131b。
在一些实施方式中，第一方向Z为中心孔121的轴向，中心孔121沿第一方向Z延伸。在一些实施方式中，本体131围合形成第一通孔。在一些实施方式中，本体131上可以设置有贯穿设置的第二通孔，第二通孔与第一通孔相互连通，通过设置第二通孔能够降低本体131的结构强度，使得本体131易于发生变形。
本体131沿第一方向Z的正投影呈具有开口131b的环状。本体131的形状设置方式有多种，本体131沿第一方向Z的正投影形状可以为具有开口131b的多边形环状、圆形环状或者椭圆形环状等。
在一些实施方式中，本体131沿第一方向Z的正投影形成为具有开口131b的圆形环状，使得本体131的形状与中心孔的形状更加匹配。本体131的材料设置方式有多种，例如本体131的材料为钢片(例如不锈钢片)，使得本体131具有良好的支撑性和弹性。或者本体131的材料包括具有弹性 变形能力的塑料(例如高分子塑料)，使得本体131能够弹性变形以改变开口131b的尺寸。
请一并参阅图5至图8，图7是是本申请实施例提供的一种支撑件130在另一状态下的结构示意图，图8是图7中的支撑件130在另一视角下的结构示意图。
如图5和图6所示，支撑件130在自然状态下开口131b的尺寸较大，支撑件130的径向尺寸较大。图7和图8所示，当支撑件130受夹持变形时，开口131b尺寸减小，支撑件130的径向尺寸减小。
本申请实施例的技术方案中，支撑件130用于电池单体100，在支撑件130的使用过程中，支撑件130可以设置于电极主体124的中心孔121内，支撑件130在中心孔121内支撑电极组件120，以改善电极组件120在电池单体100发生热失控时易坍塌的问题，因此通过在电池单体100内设置支撑件130能够提高电池单体100的安全性能。
此外，支撑件130包括本体131，本体131环绕沿第一方向Z延伸的轴线呈半环状，本体131具有两个端部131a及位于两个端部131a之间的开口131b，通过改变开口131b的尺寸，可以改变支撑件130的径向尺寸。在支撑件130伸入中心孔之前，如图7和图8所示，可以通过减小开口131b的尺寸而减小支撑件130的径向尺寸，便于将支撑件130送入中心孔121内。支撑件130伸入中心孔121后，如图5和图6，可以恢复支撑件130的径向尺寸，使得支撑件130的径向尺寸增大，支撑件130能够向中心孔提供更好的支撑。因此，通过在支撑件130上设置位于两个端部131a之间的开口131b，能够提高支撑件130的装配效率。
请参阅图9至图12，图9是本申请另一实施例提供的一种支撑件130的结构示意图，图10是图9中的支撑件130在另一视角下的结构示意图。图11是本申请另一实施例提供的一种支撑件130在另一状态下的结构示意图，图12是图11中支撑件130在另一视角下的结构示意图。
在本申请一些实施例中，如图9至图12所示，支撑件130还包括夹持部132，夹持部132连接于两个端部131a中的至少一者并朝向本体131内延伸成型。
夹持部132和本体131可以一体铸造成型，例如当夹持部132和本体131的材料均包括塑料时，夹持部132和本体131可以一体铸造成型。或者夹持部132和本体131分体制备，然后夹持部132通过粘接胶等方式连接于端部131a。
夹持部132的尺寸设置方式有多种，夹持部132在第一方向Z上的延伸尺寸可以小于本体131在第一方向Z上的延伸尺寸，以减小夹持部132占据的空间尺寸。或者夹持部132和本体131在第一方向Z上的延伸尺寸相等，以简化支撑件130的结构。或者，夹持部132在第一方向Z上的延伸尺寸大于本体131在第一方向Z上的延伸尺寸，便于对夹持部132进行夹持操作。本申请实施例以夹持部132和本体131在第一方向Z上的延伸尺寸相等为例进行举例说明。
在一些实施方式中，通过在支撑件130上设置夹持部132，且夹持部132朝向本体131内延伸，便于从本体131内夹持夹持部132而改变开口131b尺寸，并改变支撑件130的径向尺寸。夹持部132设置于本体131内，因此能够从本体131内夹持时，便于将支撑件130送入中心孔121内。
在本申请一些实施例中，如图9至图12所示，夹持部132为两个，各夹持部132分别连接于各端部131a。
两个夹持部132的尺寸和形状可以相同或不同，只要两个夹持部132分别连接于两个端部131a即可。在一些实施方式中，两个夹持部132的形状和尺寸相同，便于支撑件130的制备成型。在一些实施方式中，两个夹持部132沿第三方向Y并排设置。
在这些实施例中，两个夹持部132分别连接于两个端部131a，通过改变两个夹持部132之间的距离，能够改变两个端部131a之间的距离，从而改变开口131b的大小和支撑件130的径向尺寸。
在本申请一些实施例中，如图9至图12所示，夹持部132呈板状，且两个夹持部132相互平行设置。
在这些实施例中，夹持部132呈板状，能够减小夹持部132在本体131内占据的空间尺寸。当支撑件130用于电池单体时，能够减小支撑件130占 据的中心孔121空间，使得中心孔121内留有足够的用于流通活性物质或热气的空间。两个夹持部132相互平行设置，便于对两个夹持部132进行夹持，可以从夹持部132相互远离的一侧对夹持部132进行夹持操作。
在支撑件130插入中心孔121前，可以利用夹具夹持两个夹持部132，减小两个夹持部132之间的间距，减小支撑件130的径向尺寸。在将支撑件130设置于中心孔121后，可以释放夹具，令两个夹持部132在支撑件130自身弹性作用力下相互远离，增加两个夹持部132之间的间距，增大支撑件130的径向尺寸，使得支撑件130能够向中心孔121提供更好的支撑。
请参阅图13和图14，图13是本申请又一实施例提供的一种支撑件130的结构示意图，图14是图13中的支撑件130在另一视角下的结构示意图。
在本申请一些实施例中，如图13和图14所示，两个夹持部132之间设置有变形部133，变形部133沿两个夹持部132的并排方向(即第三方向Y)可变形设置，以通过变形部133的变形改变支撑件130的径向尺寸。
在这些实施例中，通过在两个夹持部132之间设置变形部133，使得变形部133的变形能够改变两个夹持部132之间的距离，进而改变支撑件130的径向尺寸，能够改善由于支撑件130形变不到位而影响支撑件130的支撑能力。
变形部133的设置方式有多种，变形部133例如可以为材料膨胀变形，或者变形部133可以为弹性变形。变形部133的尺寸设置方式有多种，例如变形部133在第一方向Z的延伸尺寸小于夹持部132在第一方向Z的延伸尺寸，只要在变形部133的变形作用下，能够增大两个夹持部132之间的间距即可。变形部133的个数可以为一个，或者变形部133的个数为多个，多个变形部133沿第一方向Z间隔设置。
变形部133在第二方向X上的延伸尺寸与夹持部132可以相同或不同，例如变形部133在第二方向X上的延伸尺寸可以小于夹持部132在第二方向X上的延伸尺寸，能为变形部133在第二方向X上的变形提供空间。或者变形部133在第二方向X上的延伸尺寸可以等于夹持部132在第二方向 X上的延伸尺寸，当变形部133在第二方向X上膨胀变形时，变形部133能够增大支撑件130的尺寸，使得支撑件130能够更好地支撑中心孔121。
在本申请一些实施例中，如图13和图14所示，变形部133包括膨胀段，膨胀段被配置为能够吸收电池单体100内的电解液并膨胀变形，以增大两个夹持部132之间的间距。
在这些实施例中，变形部133包括膨胀段，膨胀段能够吸收液体膨胀变形。例如当支撑件130设置于中心孔121内后，向电池单体注电解液时，膨胀段能够吸收电解液膨胀变形，从而增大两个夹持部132之间的距离，增大支撑件130的径向尺寸，使得支撑件130能够更好地支撑中心孔121。膨胀段的材质具体可以为膨胀胶、吸水树脂等。膨胀段的材料例如包括定向聚苯乙烯。
在本申请一些实施例中，如图15所示，变形部133包括沿两个夹持部132的并排方向可往复变形的弹性部件。
在这些实施例中，通过弹性部件的弹性变形，可以增大两个夹持部132之间的距离。例如，在支撑件130置于中心孔121之前，可以通过弹性部件的弹性变形减小两个夹持部132之间的距离，从而减小支撑件130的径向尺寸，可以更加快速地将支撑件130送入中心孔121内。当支撑件130位于中心孔121内后，在弹性部件的弹性恢复力的作用下，弹性部件能够恢复原状，从而能够增大两个夹持部132之间的距离，增大支撑件130的径向尺寸，使得支撑件130能够更好地支撑中心孔121。
在一些实施方式中，弹性部件可以为弹簧或者弹性橡胶。当变形部133处于自然状态时，两个夹持部132之间的距离较大，支撑件130的径向尺寸较大，例如支撑件130的径向尺寸和中心孔121的孔径接近。在支撑件130进入中心孔121前，可以压缩弹性部件，使得两个夹持部132之间的距离减小，支撑件130的径向尺寸减小，便于将支撑件130快速装配于中心孔121内。当支撑件130进入中心孔121后，令压缩部件恢复自然状态，支撑件130的径向尺寸增大，从而向中心孔121提供更好的支撑。
在本申请一些实施例中，如图9至图15所示，夹持部132具有连接端 和自由端，连接端和端部131a相互连接，自由端位于本体131内并与本体131的内表面间隔设置。
在这些实施例中，夹持部132通过连接端连接于端部131a，夹持部132的自由端与本体131间隔设置，一方面能够减小夹持部132占据的空间，另一方面在本体131的变形过程中，能够避免夹持部132和本体131的内表面之间出现滑动摩擦而影响支撑件130的使用寿命。
在本申请一些实施例中，如图9至图15所示，夹持部132和端部131a圆滑过渡连接。因此能够改善夹持部132和端部131a的连接位置处对中心孔121内壁面的剐蹭。
在一些实施方式中，夹持部132和端部131a的外表面圆滑过渡连接，夹持部132和端部131a的外表面之间可以通过倒圆角圆滑过渡连接。夹持部132和端部131a的外表面是指支撑件130位于中心孔121内时其朝向中心孔121的表面。在本申请一些实施例中，如图9至图15所示，支撑件130还包括柔性连接层134，柔性连接层134连接于两个端部131a之间。
柔性连接层134的材料例如可以为塑料等绝缘材料。例如柔性连接层134的材料可以包括聚氯乙烯、聚苯乙烯等。
在这些实施例中，柔性连接层134例如呈薄膜状，使得柔性连接层134能够柔性变形。当支撑件130的径向尺寸减小时，柔性连接层134可以通过开口131b收纳于本体131内。当支撑件130的径向尺寸增大时，柔性连接层134能够由本体131内伸出并连接两个端部131a之间。柔性连接层134能够向两个端部131a提供限位，避免两个端部131a之间的尺寸过大对中心孔121的内壁面造成挤压变形。此外，通过设置柔性连接层134，使得柔性连接层134能够在开口131b处支撑中心孔121，提高支撑件130的支撑能力。
在本申请一些实施例中，柔性连接层134与本体131一体成型。例如当本体131的材料包括塑料时，柔性连接层134可以与本体131一体铸造成型。柔性连接层134的厚度小于本体131的壁厚，使得柔性连接层134具有良好的柔性。柔性连接层134与本体131一体成型能够提高柔性连接层 134和本体131之间的连接强度。
在本申请一些实施例中，柔性连接层134与本体131分体设置，且柔性连接层134连接于本体131朝向中心孔121的外表面。
在这些实施例中，当柔性连接层134和本体131分体设置时，柔性连接层134连接于本体131的外表面，便于柔性连接层134和本体131之间连接工艺的进行，且能够在一定程度上增大支撑件130的径向尺寸，提高支撑件130的支撑能力。
在一些实施例中，两个端部131a之间的距离大于或等于0.5mm。在一些实施方式中，如图14所示，两个端部131a之间的距离大于或等于d*sin(π/2d)，d为支撑件130的外径。
d是指支撑件130在使用状态时的外径，即支撑件130与中心孔121的至少部分内壁面相互贴合时的外径。此时支撑件130的外径与中心孔121的孔径接近。在一些实施方式中，d还可以直接区中心孔121的孔径。
在这些实施例中，两个端部131a之间的距离在上述范围之内时，能够改善由于两个端部131a之间的尺寸过小，使得支撑件130的变径空间过小，不利于支撑件130快速送入中心孔121内。
在一些实施例中，两个端部131a之间的距离不大于πd/4。在一些实施方式中，两个端部131a之间的距离不大于d*sin(π/12)。
其中，d的定义可以如上所述为支撑件130的外径或者，d为中心孔121的孔径。
在这些实施例中，两个端部131a之间的距离在上述范围之内时，能够改善由于两个端部131a之间的距离过大而影响支撑件130的支撑能力。
在一些实施例中，支撑件130的弹性模量为0.91GPa～200GPa。使得支撑件130具有良好的变形和恢复变形的能力。支撑件130的弹性模量可以为支撑件130材料本身的弹性模量，或者支撑件130的弹性模量还可以为成型以后支撑件130整体的弹性模量。
在本申请一些实施例中，本申请实施例还提供一种电池单体，包括电极组件，呈卷绕状，具有沿第一方向贯穿的中心孔；上述任一实施例的 支撑件，至少一个支撑件位于中心孔并用于支撑中心孔。
在本申请一些实施例中，本申请实施例还提供一种电池，包括箱体300；及上述任一实施例的电池单体100，电池单体100位于箱体300内。
在本申请一些实施例中，本申请实施例还提供一种用电装置，包括上述任一实施例的电池单体100，电池单体100用于提供电能；或者包括上述任一实施例的电池，电池用于提供电能。
用电装置可以是前述任一应用电池的设备或系统。
在本申请一些实施例中，本申请实施例还提供一种电池单体的装配方法，包括：
步骤S01：提供一种支撑件，支撑件包括本体，本体环绕沿第一方向延伸的轴线设置，且本体具有在环绕轴线的路径上相对的两端部、及位于两端部之间的开口。
支撑件可以为上述任一实施例的支撑件。
步骤S02：夹持支撑件以使两个端部相互靠近，支撑件的径向尺寸减小。
当支撑件包括两个夹持部时，在步骤S02中可以通过夹持两个夹持部以使两个端部相互靠近，减小支撑件的径向尺寸。
步骤S03：将径向尺寸减小后的支撑件设置于电极组件的中心孔内，中心孔沿第一方向延伸。步骤S04：释放支撑件以使两端部相互远离，支撑件的径向尺寸增大，至少部分本体部与电极组件朝向中心孔的内表面接触连接。
在一些实施方式中，如上所述，支撑件还可以包括夹持部，当支撑件的本体上连接有夹持部时，在步骤S02中，可以使用夹具夹持夹持部，使得支撑件的两个端部靠近，支撑件的径向尺寸减小。在步骤S03中通过移动夹具控制支撑件移动至中心孔内。在步骤S04中，可以释放夹具，进而释放夹持部，释放支撑件，使得夹持部在支撑件自身弹性力的作用下相互远离，支撑件的径向尺寸增大，至少部分本体部与电极组件朝向中心孔的内表面接触连接。
在本申请提供的装配方法中，先将支撑件的径向尺寸减小以后，再将支 撑件设置于中心孔内，径向尺寸减小后的支撑件与中心孔的孔径相差较大，便于支撑件和中心孔的相互对位，使得支撑件能够快速设置于中心孔内。再将支撑件设置于中心孔后，通过释放支撑件使得两个端部相互远离，开口增大，支撑件的径向尺寸能够增大，能够提高支撑件的支撑能力。
请参阅图4至图12，本申请实施例提供一种支撑件130，用于电池单体100、并由电池单体100中电极组件120的中心孔121内支撑电极组件120，支撑件130包括本体131，本体131环绕沿第一方向Z延伸的轴线设置，且本体131具有在环绕轴线的路径上相对设置的两个端部131a、及位于两个端部131a之间的开口131b。支撑件130还包括夹持部132，夹持部132为两个，各夹持部132分别连接于各端部131a。夹持部132呈板状，且两个夹持部132相互平行设置。夹持部132具有连接端和自由端，连接端和端部131a相互连接，自由端位于本体131内并与本体131的内表面间隔设置。夹持部132和端部131a圆滑过渡连接。支撑件130还包括柔性连接层134，柔性连接层134连接于两个端部131a之间。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围，其均应涵盖在本申请的权利要求和说明书的范围当中。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (17)

  1. 一种支撑件，用于设置于所述电池单体中卷绕状电极组件的中心孔内，其特征在于，所述支撑件包括本体，所述本体环绕沿第一方向延伸的轴线设置，且所述本体具有在环绕所述轴线的路径上相对设置的两个端部、及位于两个所述端部之间的开口。
  2. 根据权利要求1所述的支撑件，其特征在于，所述支撑件还包括夹持部，所述夹持部连接于两个所述端部中的至少一者并朝向所述本体内延伸成型。
  3. 根据权利要求2所述的支撑件，其特征在于，所述夹持部为两个，各所述夹持部分别连接于各所述端部。
  4. 根据权利要求3所述的支撑件，其特征在于，所述夹持部呈板状，且两个所述夹持部相互平行设置。
  5. 根据权利要求3所述的支撑件，其特征在于，两个所述夹持部之间设置有变形部，所述变形部沿两个所述夹持部的并排方向可变形设置，以通过所述变形部的变形改变所述支撑件的径向尺寸。
  6. 根据权利要求5所述的支撑件，其特征在于，所述变形部包括膨胀段，所述膨胀段被配置为能够吸收所述电池单体内的电解液并膨胀变形，以增大两个所述夹持部之间的间距。
  7. 根据权利要求5所述的支撑件，其特征在于，所述变形部包括沿两个所述夹持部的并排方向可往复变形的弹性部件。
  8. 根据权利要求2所述的支撑件，其特征在于，所述夹持部具有连接端和自由端，所述连接端和所述端部相互连接，所述自由端位于所述本体内并与所述本体的内表面间隔设置。
  9. 根据权利要求2所述的支撑件，其特征在于，所述夹持部和所述端部圆滑过渡连接。
  10. 根据权利要求1-9任一项所述的支撑件，其特征在于，所述支撑件还包括柔性连接层，所述柔性连接层连接于两个所述端部之间。
  11. 根据权利要求10所述的支撑件，其特征在于，所述柔性连接层与所 述本体部一体成型，或者，所述柔性连接层与所述本体部分体设置，且所述柔性连接层连接于所述本体部朝向所述中心孔的外表面。
  12. 根据权利要求1-9任一项所述的支撑件，其特征在于，两个所述端部之间的距离大于或等于d*sin(π/2d)，和/或，两个所述端部之间的距离不大于d*sin(π/12)，d为所述支撑件的外径。
  13. 根据权利要求1-9任一项所述的支撑件，其特征在于，所述支撑件的弹性模量为0.91GPa～200GPa。
  14. 一种电池单体，其特征在于，包括：
    电极组件，呈卷绕状，具有沿第一方向延伸的中心孔；
    权利要求1-13任一项所述的支撑件，至少一个所述支撑件位于所述中心孔并用于支撑所述中心孔。
  15. 一种电池，其特征在于，包括：
    箱体；及
    根据权利要求14所述的电池单体，所述电池单体设置于所述箱体内。
  16. 一种用电装置，其特征在于，包括根据权利要求14所述的电池单体，所述电池单体用于提供电能；或者
    包括根据权利要求15所述的电池，所述电池用于提供电能。
  17. 一种电池单体的装配方法，其特征在于，包括：
    提供一种支撑件，所述支撑件包括本体，所述本体环绕沿第一方向延伸的轴线设置，且所述本体具有在环绕所述轴线的路径上相对的两端部、及位于所述两端部之间的开口；
    夹持所述支撑件以使两个所述端部相互靠近，所述支撑件的径向尺寸减小；
    将径向尺寸减小后的所述支撑件设置于电极组件的中心孔内，所述中心孔沿所述第一方向延伸；
    释放所述支撑件以使所述两端部相互远离，所述支撑件的径向尺寸增大，至少部分本体部与所述电极组件朝向所述中心孔的内表面接触连接。
PCT/CN2022/105343 2022-07-13 2022-07-13 支撑件、电池单体、电池、用电装置及装配方法 WO2024011438A1 (zh)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11144763A (ja) * 1997-11-05 1999-05-28 Toray Ind Inc 電 池
JP2003092148A (ja) * 2001-09-18 2003-03-28 Hitachi Maxell Ltd 非水二次電池
CN103579575A (zh) * 2012-08-08 2014-02-12 三星Sdi株式会社 可再充电电池、电池芯和装配可再充电电池的方法
CN106165148A (zh) * 2015-02-13 2016-11-23 株式会社Lg化学 可再充电电池
CN110431700A (zh) * 2017-03-17 2019-11-08 戴森技术有限公司 储能设备

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11144763A (ja) * 1997-11-05 1999-05-28 Toray Ind Inc 電 池
JP2003092148A (ja) * 2001-09-18 2003-03-28 Hitachi Maxell Ltd 非水二次電池
CN103579575A (zh) * 2012-08-08 2014-02-12 三星Sdi株式会社 可再充电电池、电池芯和装配可再充电电池的方法
CN106165148A (zh) * 2015-02-13 2016-11-23 株式会社Lg化学 可再充电电池
CN110431700A (zh) * 2017-03-17 2019-11-08 戴森技术有限公司 储能设备

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