Pressing equipment and battery production line

Abstract

The utility model relates to pressing equipment and a battery production line. The pressing equipment comprises a first hot pressing plate; the second hot pressing plate is movably arranged above the first hot pressing plate in the vertical direction; the at least one first telescopic piece is movably arranged on the first hot pressing plate in the first direction; the second hot pressing plate can be pressed at the top end of the first telescopic part and enables the first telescopic part to stretch out and draw back in the vertical direction; and the first direction is intersected with the vertical direction. The pressing equipment and the battery production line provided by the embodiment of the utility model can be suitable for hot pressing of naked battery cells of various specifications.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a pressing device and a battery production line. Background Art

[0002] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0003] Currently, battery manufacturers generally use pressing equipment to perform hot pressing and shaping of bare battery cells. However, bare battery cells of different specifications require different limiters during hot pressing, and the limiters need to be replaced frequently, which makes hot pressing inconvenient. Utility Model Content

[0004] Based on this, it is necessary to provide a pressing device and a battery production line to address the problem that the pressing equipment cannot be used for bare cells of various specifications.

[0005] A first aspect of an embodiment of the present application provides a pressing device, comprising: a first hot pressing plate; a second hot pressing plate, movably arranged above the first hot pressing plate in a vertical direction; and at least one first telescopic member, movably arranged on the first hot pressing plate in a first direction; the second hot pressing plate can be pressed on the top end of the first telescopic member and enable the first telescopic member to telescope along the vertical direction; the first direction is arranged to intersect with the vertical direction.

[0006] In this way, bare cells of different specifications are placed on the first hot pressing plate, and the first telescopic member can be pressed against the side of the bare cells along the first direction to ensure that the first telescopic member can be limited to ensure the shaping effect of hot pressing, so that the pressing equipment can be suitable for hot pressing of bare cells of various specifications; the second hot pressing plate moves downward in the vertical direction until the first hot pressing plate and the second hot pressing plate respectively abut against the two large surfaces of the bare cells, and the first hot pressing plate and the second hot pressing plate heat and pressurize the bare cells; in the process of the second hot pressing plate moving downward, the first telescopic member is stretched and retracted accordingly to ensure that the first telescopic member can be used to limit the bare cells and prevent the bare cells from extending outward during the hot pressing process, thereby completing the shaping of the bare cells and effectively improving the density of the bare cells.

[0007] In one embodiment, the first telescopic member includes a movable seat, a first elastic member and a first telescopic plate; the movable seat is formed with a blind hole with an opening at the top, the first telescopic plate is at least partially accommodated in the blind hole, and the first elastic member is supported between the bottom end of the blind hole and the first telescopic plate; the movable seat is movably arranged on the first hot pressing plate along the first direction, and the second hot pressing plate can be pressed on the top of the first telescopic plate, and the first telescopic plate can be moved relative to the movable seat along the vertical direction. In this way, the side of the bare cell is limited by the first telescopic plate and the movable seat to prevent the bare cell from extending outward during the hot pressing process, thereby completing the shaping of the bare cell and effectively improving the density of the bare cell.

[0008] In one embodiment, the pressing device includes a driving member; the driving member is used to drive the movable seat to move along the first direction. In this way, it can be ensured that the first telescopic plate and the movable seat can limit the side of different types of bare cells, avoid the formation of gaps between the first telescopic member and the bare cells, and ensure that the bare cells will not extend outwards beyond the first telescopic member during the hot pressing process, so that the hot pressing shaping effect of the bare cells is good and the density of the bare cells is effectively improved.

[0009] In one embodiment, the pressing device includes two first telescopic members, and the two first telescopic members are arranged at a relative interval along the first direction. By arranging the two first telescopic members at a relative interval along the first direction, bare cells of different specifications are placed on the first hot pressing plate. Under the drive of the driving member, the two first telescopic members respectively contact the two opposite sides of the bare cell along the first direction, and the forces of the two first telescopic members along the first direction are equal and opposite to each other, so as to ensure that the bare cell will not be displaced on the first hot pressing plate; the two opposite sides of the bare cell along the first direction are limited by the two first telescopic members to prevent the bare cell from extending outward during the hot pressing process, thereby completing the shaping of the bare cell and effectively improving the density of the bare cell.

[0010] In one embodiment, the pressing device includes a second telescopic member that is telescopic along the vertical direction; the second telescopic member is fixed on the first hot pressing plate; the normal direction of the second telescopic member is the second direction, the normal direction of the first telescopic member is the first direction, and the first direction, the second direction and the vertical direction are arranged to intersect each other; the first telescopic member and the second telescopic member are jointly enclosed to form a receiving cavity for receiving the bare battery cell. In this way, the bare battery cell is placed on the first hot pressing plate and is specifically arranged in the receiving cavity to avoid positional displacement during the hot pressing process; the second telescopic member can limit the two side ends of the bare battery cell from the second direction, and the first telescopic member can limit the two side surfaces of the bare battery cell from the first direction to avoid the bare battery cell from extending outward during the hot pressing process, thereby completing the shaping of the bare battery cell and effectively improving the density of the bare battery cell.

[0011] In one embodiment, the second telescopic member includes a second elastic member and a second telescopic plate; a positioning groove with an open top is formed on the first hot pressing plate, the second telescopic plate is at least partially accommodated in the positioning groove, and the second elastic member is supported between the bottom of the positioning groove and the second telescopic plate. In this way, the side ends of the bare cell are limited by the second telescopic plate to prevent the bare cell from extending outward during the hot pressing process, thereby completing the shaping of the bare cell and effectively improving the density of the bare cell.

[0012] In one embodiment, the second telescopic plate of at least one of the second telescopic members is recessed downward along the vertical direction to form an escape groove. In this way, the escape groove is used to avoid the tabs of the bare battery cell, ensuring that the first hot pressing plate and the second hot pressing plate will not press the tabs during the hot pressing process.

[0013] In one embodiment, a plurality of positioning grooves are formed on the first hot pressing plate, and all the positioning grooves are arranged relatively spaced apart along the second direction; each positioning groove extends along the first direction. In this way, when facing bare cells of different specifications, the second telescopic member can be adjusted to be fixed in different positioning grooves, thereby forming different spacings to accommodate bare cells of different specifications.

[0014] In one embodiment, the pressing device includes two second telescopic members, which are arranged at a relative interval along the second direction. In this way, the two opposite side ends of the bare cell along the second direction can be limited by the two second telescopic members, so as to prevent the bare cell from extending outward during the hot pressing process, thereby completing the shaping of the bare cell and effectively improving the density of the bare cell.

[0015] In one embodiment, the pressing equipment includes: a base, a driving unit and a guide column; the first hot pressing plate is fixed on the base; the guide column is erected on the base, the second hot pressing plate is movably mounted on the guide column, and the driving unit is transmission-connected to the second hot pressing plate.

[0016] A second aspect of an embodiment of the present application provides a battery production line, comprising the above-mentioned pressing equipment.

[0017] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a pressing device provided in some embodiments of the present application.

[0019] Figure 2 A schematic diagram of the positional relationship among a first compression member, a driving member, a base and a hot pressing plate provided in some embodiments of the present application.

[0020] Figure 3 for Figure 1 The shown schematic diagram is a projection diagram of the pressing device along the vertical direction, wherein the second hot pressing plate, the base, the guide column and the driving part are omitted.

[0021] Figure 4 A schematic structural diagram of a pressing device provided for some embodiments of the present application, wherein a local area is cut away to show the internal structure.

[0022] Figure 5 for Figure 4 An enlarged view of area A of the pressing apparatus is shown.

[0023] Description of reference numerals:

[0024] Base-10, first hot pressing plate-20, positioning groove-21, second hot pressing plate-30, first telescopic member-40, movable seat-41, first elastic member-42, first telescopic plate-43, blind hole-44, driving member-45, second telescopic member-50, bare battery cell-900, pole ear-910, accommodating cavity-920, second elastic member-52, second telescopic plate-53, avoidance groove-54, driving part-60, guide column-70. DETAILED DESCRIPTION

[0025] The following embodiments of the technical solution of the present application will be described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0027] In the description of the embodiments of the present application, if the technical terms "first", "second", etc. appear, these terms are only used for descriptive purposes to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0028] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0029] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0030] In the description of the embodiments of the present application, if the term "multiple" appears, "multiple" means at least two (including two), such as two, three, etc., unless otherwise clearly and specifically defined. Similarly, if the term "multiple groups" appears, "multiple groups" refers to more than two groups (including two groups), and if the term "multiple sheets" appears, "multiple sheets" refers to more than two sheets (including two sheets).

[0031] In the description of the embodiments of the present application, if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0032] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, if the technical terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0033] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0035] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0036] As one of the future development trends of power batteries, all-solid-state batteries have the advantages of high density, high energy density and good safety. With the development of all-solid-state battery technology, higher requirements are also put forward for the uniformity of hot pressing of all-solid-state batteries. In related technologies, all-solid-state batteries perform hot pressing on the stacked bare cells. After hot pressing, the height and width of the bare cells are consistent, which is convenient for shaping and packaging. However, in the process of hot pressing using this process, the bare cells are often in a free state. Corresponding limiters need to be set on the sides of the bare cells to ensure the shaping effect of hot pressing. The limiters required for bare cells of different specifications are often inconsistent, resulting in the inability of the pressing equipment to be universal for bare cells of various specifications. The limiters need to be replaced frequently. Once the limiters used for the bare cells are not suitable, the plastic deformation of the bare cells will be inconsistent, thereby affecting the safety performance of the bare cells and the subsequent shelling process, etc., and ultimately affecting the performance of all-solid-state batteries.

[0037] In order to alleviate the problem that the pressing equipment cannot be used for bare cells of various specifications, a telescopic part that can move on the hot pressing plate can be designed to facilitate the adjustment of the spacing to accommodate bare cells of different specifications for hot pressing.

[0038] The embodiments of the present application provide a pressing device and a battery production line for the production of all-solid-state batteries.

[0039] All-solid-state batteries can provide power to or store power for power-consuming devices. Power-consuming devices may be, but are not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0040] All-solid-state batteries usually include a bare cell, which is formed by stacking a positive electrode, a solid electrolyte, and a negative electrode.

[0041] The negative electrode may include at least one of pure lithium, a lithium alloy, and a lithium metal composite oxide.

[0042] The solid electrolyte may include at least one of a sulfide-based solid electrolyte, an oxide-based solid electrolyte, and an organic solid electrolyte.

[0043] The positive electrode generally includes a positive electrode active material, a conductive agent and a binder mixed and coated on one side of the positive electrode current collector.

[0044] The positive electrode current collector may use at least one of stainless steel, aluminum, nickel, titanium, and aluminum or stainless steel surface-treated with carbon, nickel, titanium, or silver.

[0045] The positive electrode active material can be a compound composed of one or more materials selected from lithium, nickel, cobalt, manganese, aluminum, zirconium, titanium, vanadium, magnesium, iron, molybdenum, etc., such as lithium titanate, lithium niobate, lithium borate, lithium zirconate, and lithium cobaltate.

[0046] The conductive agent may generally include graphite (e.g., natural graphite or artificial graphite), carbon black (e.g., acetylene black, Ketjen black, channel black, furnace black, lamp black or thermal black), conductive fibers (e.g., carbon fibers or metal fibers), metal powders (e.g., fluorinated carbon powder, aluminum powder or nickel powder), conductive whiskers (e.g., zinc oxide or potassium titanate), conductive metal oxides (e.g., titanium oxide) or conductive materials (e.g., polyphenylene derivatives) may be used as the conductive agent.

[0047] The binder can be any one or a mixture of two or more selected from the group consisting of polyamide-imide (PAI), polyimide (PI), polyamide (PA), polyamic acid, polyethylene oxide (PEO), polystyrene (PS), poly(ethylene-co-propylene-co-5-methylene-2-norbornene) (PEP-MNB), polyvinylidene fluoride (PVDF), poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP), polystyrene nitrile-butadiene rubber (PS-NBR), poly(methacrylate) nitrile-butadiene rubber (PMMA-NBR) and mixtures thereof.

[0048] During the production process of the all-solid-state battery of the embodiment of the present application, the bare battery cell needs to be hot-pressed and shaped in order to facilitate shelling and packaging.

[0049] Figure 1 A schematic diagram of the structure of a pressing device provided in some embodiments of the present application. Figure 2 A schematic diagram of the positional relationship among a first compression member, a driving member, a base and a hot pressing plate provided in some embodiments of the present application. Figure 3 for Figure 1 The shown schematic diagram is a projection diagram of the pressing equipment along the vertical direction. Figure 4 for Figure 1 The schematic diagram of the structure of the pressing device shown is from another perspective. Figure 5 for Figure 4 An enlarged view of area A of the pressing apparatus is shown.

[0050] A first aspect of the present application provides a pressing device for hot pressing a bare cell 900 of an all-solid-state battery to facilitate shelling and packaging.

[0051] See also Figures 1 to 5 As shown, the pressing equipment includes: a first hot pressing plate 20, a second hot pressing plate 30 and at least one first telescopic member 40; the second hot pressing plate 30 is movably arranged above the first hot pressing plate 20 along the vertical direction Z; the first telescopic member 40 is movably arranged on the first hot pressing plate 20 along the first direction X; the second hot pressing plate 30 can be pressed on the top end of the first telescopic member 40, and the first telescopic member 40 is telescoped along the vertical direction Z; the first direction X is arranged to intersect with the vertical direction Z.

[0052] By arranging the first telescopic member 40 movably along the first direction X on the first hot pressing plate 20; the second hot pressing plate 30 can be pressed on the top of the first telescopic member 40, and the first telescopic member 40 can be telescoped along the vertical direction Z; in this way, bare cells 900 of different specifications are placed on the first hot pressing plate 20, and the first telescopic member 40 can be pressed against the side of the bare cell 900 along the first direction X, ensuring that the first telescopic member 40 can be limited to ensure the shaping effect of hot pressing, so that the pressing equipment can be suitable for hot pressing of bare cells of various specifications. The second hot pressing plate 30 moves downward along the vertical direction Z until the first hot pressing plate 20 and the second hot pressing plate 30 are respectively in contact with the two large surfaces of the bare battery cell 900, and the first hot pressing plate 20 and the second hot pressing plate 30 heat and pressurize the bare battery cell 900 to shape it; during the downward movement of the second hot pressing plate 30, the first telescopic member 40 is extended and retracted accordingly, ensuring that the first telescopic member 40 can be used to limit the bare battery cell 900 and prevent the bare battery cell 900 from extending outward during the hot pressing process, thereby completing the shaping of the bare battery cell 900 and effectively improving the density of the bare battery cell 900.

[0053] Those skilled in the art should know that the process of hot pressing the bare battery cell 900 by the first hot pressing plate 20 and the second hot pressing plate 30 and the structure involved are the same as the process and structure of hot pressing the battery cell 1 in the current production, and the specific structure of the first hot pressing plate 20 and the second hot pressing plate 30 to achieve heating will not be further described in the embodiments of the present application.

[0054] In the embodiment of the present application, the first direction X is arranged to intersect with the vertical direction Z; specifically, the first direction X may be a direction in a horizontal plane, which is arranged perpendicular to the vertical direction Z.

[0055] In each embodiment of the present application, the bare battery cell 900 is generally square, has two large faces with relatively large areas and four side faces surrounding the two large faces. For the convenience of description, two side faces relatively arranged along the first direction X among the four side faces are defined as side faces, and two side faces relatively arranged along the second direction Y among the four side faces are defined as side ends.

[0056] In some possible embodiments, see Figure 1 and Figure 2 As shown, the first telescopic member 40 includes a movable seat 41, a first elastic member 42 and a first telescopic plate 43; the movable seat 41 is formed with a blind hole 44 with a top opening, the first telescopic plate 43 is at least partially accommodated in the blind hole 44, and the first elastic member 42 is supported between the bottom end of the blind hole 44 and the first telescopic plate 43.

[0057] The movable seat 41 is movably arranged on the first hot pressing plate 20 along the first direction X. The second hot pressing plate 30 can press on the top of the first telescopic plate 43 and make the first telescopic plate 43 move relative to the movable seat 41 along the vertical direction.

[0058] In this way, the bare cell 900 is placed on the first hot pressing plate 20, and the movable seat 41 abuts against the side of the bare cell 900 along the first direction X; the second hot pressing plate 30 moves downward along the vertical direction Z until the first hot pressing plate 20 and the second hot pressing plate 30 abut against the two large surfaces of the bare cell 900 respectively, and the first hot pressing plate 20 and the second hot pressing plate 30 heat and press the bare cell 900; during the downward movement of the second hot pressing plate 30, it presses against the top of the first telescopic plate 43, so that The first telescopic plate 43 is retracted downward in the vertical direction relative to the movable seat 41 to avoid interference with the movement of the second hot pressing plate 30, while ensuring that the second hot pressing plate 30 is always in contact with the first telescopic plate 43 to avoid gaps. The first telescopic plate 43 and the movable seat 41 are used to limit the side of the bare battery cell 900 to prevent the bare battery cell 900 from extending outward during the hot pressing process, thereby completing the shaping of the bare battery cell 900 and effectively improving the density of the bare battery cell 900.

[0059] The first elastic member 42 can be a spring. The first elastic member 42 is supported between the bottom end of the blind hole 44 and the first telescopic plate 43; when the second hot pressing plate 30 moves upward, the first telescopic plate 43 returns to its original height under the elastic force of the first elastic member 42, ensuring that the first telescopic member 40 limits the bare battery cell 900.

[0060] In some possible embodiments, see Figure 1 As shown, the pressing device includes a driving member 45; the driving member 45 is used to drive the movable seat 41 to move along the first direction X.

[0061] The driving member 45 may be a cylinder, or a push rod driven by a stepping motor and capable of moving left and right along the first direction X. The specific design shall prevail, and the present application does not limit this.

[0062] Combination Figure 2As shown, the output shaft (not marked) of the driving member 45 is connected to the movable seat 41, and can push the movable seat 41 to move to the left or pull the movable seat 41 to move to the right along the first direction X; in this way, it can ensure that the first telescopic plate 43 and the movable seat 41 can limit the sides of different types of bare battery cells 900, avoid the formation of gaps between the first telescopic member 40 and the bare battery cells 900, and ensure that the bare battery cells 900 will not extend outward beyond the first telescopic member 40 during the hot pressing process, so that the hot pressing shaping effect of the bare battery cells 900 is good, and the density of the bare battery cells 900 is effectively improved.

[0063] Projected along the vertical direction Z, the driving member 45 is disposed outside the projection range of the first hot pressing plate 20 and the second hot pressing plate 30 , and may be fixed to the base 10 (mentioned below).

[0064] In some possible embodiments, see Figure 1 and Figure 2 As shown, the pressing device includes two first telescopic members 40, and the two first telescopic members 40 are arranged along the first direction X with a relative interval.

[0065] By arranging two first telescopic members 40 relatively spaced apart along the first direction X, the bare cells 900 of different specifications are placed on the first hot pressing plate 20. Under the drive of the driving member 45, the two first telescopic members 40 respectively contact the two opposite sides of the bare cell 900 along the first direction X. The forces acting on the two first telescopic members 40 along the first direction X are equal in magnitude and opposite in direction, so as to ensure that the bare cell 900 will not be displaced on the first hot pressing plate 20. The second hot pressing plate 30 moves downward along the vertical direction Z and contacts the two first telescopic members 40 respectively. The top end of the telescopic member 40 is in contact, and the two first telescopic plates 43 retract downward along the vertical direction Z to avoid interference with the movement of the second hot pressing plate 30, while ensuring that the second hot pressing plate 30 is always in contact with the first telescopic plate 43 to avoid gaps, and ensuring that the two opposite sides of the bare battery cell 900 along the first direction X are limited by the two first telescopic members 40 to avoid the bare battery cell 900 from extending outward during the hot pressing process, thereby completing the shaping of the bare battery cell 900 and effectively improving the density of the bare battery cell 900.

[0066] In some possible embodiments, see Figures 1 to 5 As shown, the pressing equipment includes a second telescopic member 50 that can be extended along the vertical direction Z; the second telescopic member 50 is fixed on the first hot pressing plate 20; the normal direction of the second telescopic member 50 is the second direction Y, and the normal direction of the first telescopic member 40 is the first direction X, and the first direction X, the second direction Y and the vertical direction Z are arranged to intersect each other; the first telescopic member 40 and the second telescopic member 50 are jointly enclosed to form a accommodating cavity 920 for accommodating the bare battery cell 900.

[0067] Specifically, the pressing device may include two second telescopic members 50 and two first telescopic members 40, wherein the two first telescopic members 40 are relatively spaced apart along the first direction Y; and the two second telescopic members 50 are relatively spaced apart along the second direction Y. The first telescopic member 40 and the second telescopic member 50 are jointly enclosed to form a receiving cavity 920 for receiving the bare battery cell 900.

[0068] In this way, the bare battery cell 900 is placed on the first hot pressing plate 20 and is specifically arranged in the accommodating cavity 920 to avoid position displacement during the hot pressing process; the second telescopic member 50 can limit the two side ends of the bare battery cell 900 from the second direction Y, and the first telescopic member 40 can limit the two side surfaces of the bare battery cell 900 from the first direction X to avoid the bare battery cell 900 from extending outward during the hot pressing process, thereby completing the shaping of the bare battery cell 900 and effectively improving the density of the bare battery cell 900.

[0069] In the embodiment of the present application, the first direction X, the second direction Y and the vertical direction Z are arranged to intersect each other; specifically, the first direction X may be the width direction of the bare battery cell 900 in the horizontal plane, the second direction Y may be the length direction of the bare battery cell 900 in the horizontal plane, and the thickness direction of the bare battery cell 900 is the vertical direction Z. The first direction X, the second direction Y and the vertical direction Z are arranged perpendicularly to each other.

[0070] In some possible embodiments, see Figures 1 to 5 As shown, the second telescopic member 50 includes a second elastic member 52 and a second telescopic plate 53; a positioning groove 21 with a top opening is formed on the first hot pressing plate 20, and the second telescopic plate 53 is at least partially accommodated in the positioning groove 21, and the second elastic member 52 is supported between the bottom of the positioning groove 21 and the second telescopic plate 53.

[0071] In this way, the bare battery cell 900 is placed on the first hot pressing plate 20, and when the second hot pressing plate 30 moves downward, it presses against the top of the second telescopic plate 53, so that the second telescopic plate 53 retracts downward relative to the positioning groove 21 in the vertical direction to avoid interference with the movement of the second hot pressing plate 30, while ensuring that the second hot pressing plate 30 is always in contact with the second telescopic plate 53 to avoid gaps. The side ends of the bare battery cell 900 are limited by the second telescopic plate 53 to prevent the bare battery cell 900 from extending outward during the hot pressing process, thereby completing the shaping of the bare battery cell 900 and effectively improving the density of the bare battery cell 900.

[0072] The second elastic member 52 can be a spring. The second elastic member 52 is supported between the bottom of the positioning groove 21 and the second telescopic plate 53; when the second hot pressing plate 30 moves upward, the second telescopic plate 53 returns to its original height under the elastic force of the second elastic member 52, ensuring that the second telescopic member 50 limits the bare battery cell 900.

[0073] In some possible embodiments, see Figures 1 to 5 As shown, the second telescopic plate 53 of at least one second telescopic member 50 is concave downward in the vertical direction to form an escape groove 54. The escape groove 54 is used to avoid the tab 910 of the bare battery cell 900; ensuring that the first hot pressing plate 10 and the second hot pressing plate 20 will not press the tab 910 during the hot pressing process.

[0074] Optionally, two avoidance grooves 54 may be arranged at intervals on the second telescopic plate 53 to avoid the tabs 910 of the positive electrode and the negative electrode respectively.

[0075] In some possible embodiments, see Figures 1 to 5 As shown, the pressing device includes two second telescopic members 50, and the two second telescopic members 50 are arranged along the second direction Y with a relative interval.

[0076] By arranging the two second telescopic members 50 at relative intervals along the second direction Y, the two second telescopic members 50 respectively contact the two opposite side ends of the bare battery cell 900 along the second direction Y; the second hot pressing plate 30 moves downward along the vertical direction Z and contacts the top ends of the two second telescopic members 50 respectively, and the two second telescopic plates 53 retract downward along the vertical direction Z to avoid interference with the movement of the second hot pressing plate 30, while ensuring that the second hot pressing plate 30 is always in contact with the second telescopic plate 53 to avoid gaps, ensuring that the two opposite side ends of the bare battery cell 900 along the second direction Y can be limited by the two second telescopic members 50, avoiding the bare battery cell 900 from extending outward during the hot pressing process, thereby completing the shaping of the bare battery cell 900 and effectively improving the density of the bare battery cell 900.

[0077] In some possible embodiments, a plurality of positioning grooves 21 are formed on the first hot pressing plate 20 , and all the positioning grooves 21 are arranged relatively spaced apart along the second direction Y; and each positioning groove 21 extends along the first direction X.

[0078] In this way, when facing bare cells 900 of different specifications, the second telescopic member 50 can be adjusted to be fixed in different positioning grooves 21, so as to form different spacings for accommodating bare cells 900 of different specifications.

[0079] In some possible embodiments, see Figures 1 to 5 As shown, the pressing device includes: a base 10, a driving unit 60 and a guide column 70. The first hot pressing plate 20 is fixed on the base 10; the guide column 70 is erected on the base 10, the second hot pressing plate 30 is movably mounted on the guide column 70, and the driving unit 60 is transmission-connected with the second hot pressing plate 30.

[0080] In this way, the first hot pressing plate 20 is fixed on the base 10 to provide corresponding support; the driving unit 60 can drive the second hot pressing plate 30 to move downward along the guide column 70, so that the second hot pressing plate 30 can press against the top of the first telescopic plate 43 and the top of the second telescopic plate 53 and move downward. As the first telescopic plate 43 and the second telescopic plate 53 retract downward, the second hot pressing plate 30 and the first hot pressing plate 20 respectively contact the two large surfaces of the bare battery cell 900, and the first hot pressing plate 20 and the second hot pressing plate 30 heat and press the bare battery cell 900. After the hot pressing is completed, the driving unit 60 can drive the second hot pressing plate 30 to move upward along the guide column 70, so that the second hot pressing plate 30 is separated from the bare battery cell 900, which is convenient for loading and unloading.

[0081] Optionally, the driving part 60 may be a hydraulic cylinder to provide the greater pressure required when the second hot pressing plate 30 and the first hot pressing plate 20 are respectively in contact with the two large surfaces of the bare battery cell 900, thereby ensuring the completion of the hot pressing process.

[0082] Optionally, the guide post 70 may be made of stainless steel or aluminum alloy.

[0083] Optionally, see Figures 1 to 5 As shown, the pressing device includes: four guide columns 70, which are respectively erected at four corners of the base 10, and the second hot pressing plate 30 is movably mounted on the guide columns 70 to avoid deflection during the up and down movement.

[0084] Optionally, the first hot pressing plate 20 is a stainless steel plate or a copper plate, and contains a resistance heating wire for heat conduction.

[0085] Optionally, the second hot pressing plate 30 is a stainless steel plate or a copper plate, which contains a resistance heating wire for heat conduction.

[0086] A second aspect of an embodiment of the present application provides a battery production line, comprising the above-mentioned pressing equipment.

[0087] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0088] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A pressing device, characterized in that: The pressing equipment comprises: A first hot press plate (20); A second hot pressing plate (30) movably disposed above the first hot pressing plate (20) in a vertical direction; and at least one first telescopic member (40) movably arranged on the first hot pressing plate (20) along a first direction; The second hot pressing plate (30) is capable of pressing on the top end of the first telescopic member (40) and causing the first telescopic member (40) to telescope along the vertical direction; The first direction is arranged to intersect with the vertical direction.

2. The pressing device according to claim 1, characterized in that The first telescopic member (40) comprises a movable seat (41), a first elastic member (42) and a first telescopic plate (43); the movable seat (41) is formed with a blind hole (44) with an open top end, the first telescopic plate (43) is at least partially accommodated in the blind hole (44), and the first elastic member (42) is supported between the bottom end of the blind hole (44) and the first telescopic plate (43); The movable seat (41) is movably arranged on the first hot pressing plate (20) along the first direction, and the second hot pressing plate (30) is capable of pressing on the top end of the first telescopic plate (43) and allowing the first telescopic plate (43) to move relative to the movable seat (41) along the vertical direction.

3. The pressing device according to claim 2, characterized in that The pressing device comprises a driving member (45); The driving member (45) is used to drive the movable seat (41) to move along the first direction.

4. The pressing device according to any one of claims 1 to 3, characterized in that The pressing device comprises two first telescopic members (40), and the two first telescopic members (40) are arranged relatively spaced apart along the first direction.

5. The pressing device according to any one of claims 1 to 3, characterized in that The pressing device comprises a second telescopic member (50) which is telescopic along the vertical direction; The second telescopic member (50) is fixedly mounted on the first hot pressing plate (20); the normal direction of the second telescopic member (50) is the second direction, the normal direction of the first telescopic member (40) is the first direction, and the first direction, the second direction and the vertical direction are arranged to intersect each other; The first telescopic member (40) and the second telescopic member (50) together enclose a receiving cavity (920) for receiving a bare battery cell (900).

6. The pressing device according to claim 5, characterized in that The second telescopic member (50) comprises a second elastic member (52) and a second telescopic plate (53); a positioning groove (21) with an open top is formed on the first hot pressing plate (20), the second telescopic plate (53) is at least partially accommodated in the positioning groove (21), and the second elastic member (52) is supported between the groove bottom of the positioning groove (21) and the second telescopic plate (53).

7. The pressing device according to claim 6, characterized in that The second telescopic plate (53) of at least one of the second telescopic members (50) is recessed downwards along the vertical direction to form an avoidance groove (54).

8. The pressing device according to claim 6, characterized in that A plurality of positioning grooves (21) are formed on the first hot pressing plate (20), and all of the positioning grooves (21) are arranged relatively spaced apart along the second direction; and each positioning groove (21) extends along the first direction.

9. The pressing device according to claim 5, characterized in that The pressing device comprises two second telescopic members (50), and the two second telescopic members (50) are arranged relatively spaced apart along the second direction.

10. The pressing device according to claim 7, characterized in that The pressing device comprises: a base (10), a driving part (60) and a guide column (70); The first hot pressing plate (20) is fixedly mounted on the base (10); The guide column (70) is erected on the base (10), the second hot pressing plate (30) is movably mounted on the guide column (70), and the driving part (60) is transmission-connected to the second hot pressing plate (30).

11. A battery production line, characterized in that: Comprising a pressing device as claimed in any one of claims 1 to 10.

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