Solid-state battery, manufacturing equipment and manufacturing method thereof, battery pack and vehicle

Abstract

The invention relates to a solid-state battery, manufacturing equipment and a manufacturing method thereof, a battery pack and a vehicle, and belongs to the technical field of batteries. The solid-state battery manufacturing equipment comprises a lamination table and a hot-pressing mechanism, a pole piece stacking area is arranged on the upper surface of the lamination table, the hot-pressing mechanism comprises two heating plates and two driving assemblies, the two heating plates are located at the two opposite ends of the upper portion of the pole piece stacking area in the first direction respectively, and the two driving assemblies are located on the two opposite ends of the upper portion of the pole piece stacking area in the second direction respectively. The first direction is perpendicular to the stacking direction, and the driving assemblies are in one-to-one correspondence with the heating plates and are used for driving the corresponding heating plates to move up and down at the corresponding ends above the pole piece stacking area. According to the invention, dislocation between the positive plate and the negative plate can be avoided.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular to a solid-state battery and manufacturing equipment, a manufacturing method, a battery pack, and a vehicle thereof. Background Art

[0002] Solid-state batteries use non-flammable solid electrolytes instead of flammable organic liquid electrolytes, which greatly improves the safety of the battery system and achieves a simultaneous increase in energy density. The solid-state battery manufacturing process also uses a lamination process, but compared to the lamination manufacturing process of traditional lithium batteries, the lamination manufacturing process of solid-state batteries is based on the existing lithium battery manufacturing process and eliminates the diaphragm. Due to the lack of the constraints of the diaphragm coating, the positive and negative electrodes are easily misaligned and difficult to align. If the positive and negative electrodes inside the battery are not aligned, the internal shear force will be greater in the later stage under external pressure such as pressurized charging and discharging, isostatic pressing, etc., which is not conducive to the stability of the battery structure. Moreover, when the pressure increases, it may also cause an internal short circuit due to excessive shear force, causing battery failure and danger. Summary of the Invention

[0003] In view of this, the embodiments of the present disclosure provide a solid-state battery and its manufacturing equipment, manufacturing method, battery pack and vehicle, which help to avoid misalignment between the positive and negative electrodes. The technical solution is as follows:

[0004] In a first aspect, a solid-state battery manufacturing device is provided, wherein the solid-state battery manufacturing device includes a lamination table and a hot pressing mechanism;

[0005] The upper surface of the lamination table has a pole piece stacking area, and the pole piece stacking area is used for stacking pole pieces;

[0006] The hot pressing mechanism includes two heating plates and two driving components;

[0007] The two heating plates are respectively located above the electrode stacking area at two opposite ends along a first direction, wherein the first direction is perpendicular to the stacking direction of the electrode pieces;

[0008] The two driving components correspond to the two heating plates respectively, and are used to drive the corresponding heating plates to move up and down at the corresponding two ends above the electrode stacking area, so that the two heating plates can be alternately pressed on the electrodes stacked in the electrode stacking area.

[0009] In a possible implementation, the driving assembly includes a driving member and two connecting members;

[0010] The two connecting members are respectively connected to two ends of the corresponding heating plates along the second direction;

[0011] The driving member is used to drive the corresponding two connecting members to move synchronously;

[0012] The second direction is perpendicular to the stacking direction, and the first direction is perpendicular to the second direction.

[0013] In one possible implementation, the drive assembly includes at least three connecting members;

[0014] Among the at least three connecting members, at least two of the connecting members are respectively connected to two ends of the corresponding heating plate along the second direction, and at least one of the connecting members is connected to the middle of the corresponding heating plate;

[0015] The driving member is used to drive the corresponding at least three connecting members to move synchronously.

[0016] In a possible implementation, the connecting member includes a first connecting portion and a second connecting portion that are connected to each other, the first connecting portion is connected to the heating plate, and the second connecting portion is connected to the driving member.

[0017] In a possible implementation, both the upper and lower surfaces of the heating plate have anti-adhesion layers.

[0018] In a possible implementation, the electrode stacking area has a plurality of vacuum adsorption holes distributed at intervals, and the vacuum adsorption holes are all connected to a vacuum generating device.

[0019] In a second aspect, a solid-state battery manufacturing method is provided, wherein the method uses the solid-state battery manufacturing device according to any one of the first aspects, and the method comprises:

[0020] The first hot pressing step includes: placing the n-2th electrode piece in the electrode piece stacking area, and placing the n-1th electrode piece on the n-2th electrode piece, and pressing the first heating plate down to the first end of the n-1th electrode piece, so that the first end of the n-1th electrode piece and the first end of the n-2th electrode piece are compositely hot pressed together;

[0021] The judging step includes judging whether n=m+1 or n=m; when n=m+1, executing the first forming step; when n=m, executing the second forming step; when n≠m+1 and n≠m, setting n=n+2, and executing the judging step until the second end releasing step, and then executing the judging step again;

[0022] The first lamination step comprises: when the first heating plate has been pressed against the first end of the n-1th electrode piece, placing the nth electrode piece on the n-1th electrode piece;

[0023] The second end hot pressing step comprises: pressing the second heating plate down to the second end of the n-th electrode piece so that the second end of the n-th electrode piece and the second end of the n-1-th electrode piece are hot pressed together;

[0024] The first end releasing step comprises: first moving the heating plate upward;

[0025] The second lamination step comprises: when the second heating plate has been pressed against the second end of the n-th electrode piece, placing the (n+1)-th electrode piece on the n-th electrode piece;

[0026] The first end hot pressing step includes: pressing the first heating plate down to the first end of the n+1th electrode piece so that the first end of the n+1th electrode piece and the first end of the nth electrode piece are hot pressed together;

[0027] The second end releasing step comprises: moving the second heating plate upward;

[0028] The first forming step includes: pressing the second heating plate downward to the second end of the m-th electrode piece, so that the second end of the m-th electrode piece and the second end of the m-1-th electrode piece are compositely hot-pressed together, thereby obtaining a bare cell of the solid-state battery;

[0029] The second forming step includes: after performing the first lamination step to the first end releasing step, the first heating plate is pressed down to the first end of the m-th electrode piece, so that the first end of the m-th electrode piece and the first end of the m-1-th electrode piece are compositely hot-pressed together, thereby obtaining a bare cell of the solid-state battery;

[0030] The polarities of adjacent pole pieces are opposite, n and m are both positive integers, n≥3, m≥2, and in the first hot pressing step, n-2<m.

[0031] In a third aspect, a solid-state battery is provided, comprising a bare cell obtained by using the method for using the solid-state battery manufacturing equipment as described in the second aspect.

[0032] In a fourth aspect, a battery pack is provided, comprising the solid-state battery as described in the third aspect.

[0033] In a fifth aspect, a vehicle is provided, comprising the battery pack as described in the fourth aspect.

[0034] In the solution shown in the present disclosure, the positive and negative electrodes can be placed alternately in the electrode stacking area, and each time a electrode is placed, it can be pressed on the corresponding electrode by a heating plate, so that the electrode is composited and hot-pressed with the other electrodes located below it. At the same time, since the two heating plates are respectively located at opposite ends above the electrode stacking area along the first direction, the electrode sheets alternately placed in the electrode stacking area can be composited and hot-pressed together through the opposite ends through the alternating hot pressing of the two heating plates. The bare battery cell obtained in this way will not have the problem of misalignment between adjacent positive and negative electrodes during subsequent transfer, hot pressing and other processes, thereby improving the overall alignment of the battery cell and the safety performance of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0036] Figure 1 1 is a schematic top view of the structure of a first solid-state battery manufacturing device provided by an embodiment of the present disclosure;

[0037] Figure 2 is a front view structural diagram of a drive assembly provided by an embodiment of the present disclosure;

[0038] Figure 3 is a schematic top view of the structure of a second solid-state battery manufacturing device provided by an embodiment of the present disclosure;

[0039] Figure 4 is a schematic cross-sectional structural diagram of a connector provided by an embodiment of the present disclosure;

[0040] Figure 5 The embodiment of the present disclosure provides Figure 4 Schematic diagram of the local enlarged structure A;

[0041] Figure 6 1 is a schematic diagram of a top view of a stacking table provided in an embodiment of the present disclosure;

[0042] Figure 7 is a side structural schematic diagram of a first solid-state battery manufacturing device provided by an embodiment of the present disclosure;

[0043] Figure 8 1 is a schematic top view of the structure of the third solid-state battery manufacturing equipment in the first state provided by an embodiment of the present disclosure;

[0044] Figure 9 This is a schematic diagram of a positive electrode structure provided by an embodiment of the present disclosure;

[0045] Figure 10 Schematic diagram of the structure of a negative electrode sheet and a solid electrolyte provided by an embodiment of the present disclosure;

[0046] Figure 11 This is a flow chart of a method for using a solid-state battery manufacturing device provided in an embodiment of the present disclosure.

[0047] Description of Reference Numerals

[0048] 1. Lamination table; 11. Electrode stacking area; 111. Vacuum adsorption hole; 2. Hot pressing mechanism; 21. Heating plate; 211. Anti-adhesion layer; 22. Driving assembly; 221. Connector; 2211. First connecting portion; 2212. Second connecting portion; 222. Driving member; 2221. First supporting portion; 2222. Second supporting portion; 31. First direction; 31. Second direction; 32. Second direction; 5. Vacuum generating device; 6. Bare cell; 61. Positive electrode; 62. Negative electrode ; 63. Solid-state electrolyte; 71. Positive electrode positioning mechanism; 72. Negative electrode positioning mechanism; 73. Lamination robot; 74. Positive electrode clip loading mechanism; 75. Negative electrode clip loading mechanism; 76. Electrode transfer robot; 77. Bare cell transfer robot; 78. Hot pressing loading robot; 79. Hot pressing mechanism; 710. Hot pressing unloading robot; 711. Gluing mechanism; 712. Cell unloading robot; 713. Cell cache station; 714. Unloading pull belt.

[0049] 401. First hot pressing step; 402. Judging step; 403. First lamination step; 404. Second end hot pressing step; 405. First end releasing step; 406. Second lamination step; 407. First end hot pressing step; 408. Second end releasing step; 409. First forming step; 410. Second forming step. DETAILED DESCRIPTION

[0050] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0051] This embodiment relates to a solid-state battery manufacturing device, referring to Figure 1 As shown, the solid-state battery manufacturing equipment includes a lamination table 1 and a hot pressing mechanism 2. Figure 6 As shown, the upper surface of the stacking table 1 has a pole piece stacking area 11, which is used to stack pole pieces. The pole pieces generally include positive pole pieces 61 and negative pole pieces 62. The positive pole pieces 61 and the negative pole pieces 62 can be alternately stacked in the pole piece stacking area 11 along the direction of gravity to form a bare battery cell 6. In addition, there is usually a solid electrolyte 63 between the positive pole piece 61 and the negative pole piece 62, so that the positive pole piece 61 and the negative pole piece 62 do not have direct contact.

[0052] Continue to refer Figure 1 As shown, the hot pressing mechanism 2 includes two heating plates 21 and two driving components 22. The two heating plates 21 are respectively located at opposite ends of the electrode stacking area 11 along the first direction 31, wherein the first direction 31 is perpendicular to the stacking direction of the electrode. The heating plate 21 can be a strip-shaped electric heating plate. After power is turned on, the temperature of the heating plate 21 increases. While the heating plate 21 pressurizes the positive electrode sheet 61 and the negative electrode sheet 62 below, it can also heat the corresponding positive electrode sheet 61 and the negative electrode sheet 62, thereby hot-pressing the corresponding positive electrode sheet 61 and the negative electrode sheet 62 together.

[0053] Continue to refer Figure 1 As shown, the two driving components 22 correspond to the two heating plates 21, respectively, and are used to drive the corresponding heating plates 21 to move up and down at the corresponding ends above the electrode stacking area 11, so that the two heating plates 21 can alternately press on the electrode sheets stacked in the electrode stacking area 11. In this way, the two driving components 22 can drive the two heating plates 21 to move up and down respectively, so that they can alternately press on the positive electrode sheet 61 or the negative electrode sheet 62 stacked in the electrode stacking area 11.

[0054] As described above, the positive electrode sheets 61 and the negative electrode sheets 62 can be placed alternately in the electrode stacking area 11, and each time a electrode is placed, it can be pressed on the corresponding electrode sheet by a heating plate 21, so that the electrode sheet is composited and hot-pressed with the other electrode sheets located below it. At the same time, since the two heating plates 21 are respectively located at opposite ends along the first direction 31 above the electrode stacking area 11, the electrode sheets alternately placed in the electrode stacking area 11 can be composited and hot-pressed together through the opposite ends through the alternating hot pressing of the two heating plates 21. The bare battery cell 6 obtained in this way will not have the problem of misalignment between adjacent positive electrode sheets 61 and negative electrode sheets 62 during subsequent transfer, hot pressing and other processes, thereby improving the overall alignment of the battery cell and the safety performance of the battery cell.

[0055] In one example, in order to facilitate the stacking of the positive electrode sheet 61 and the negative electrode sheet 62, Figure 10 In the embodiment, the solid electrolyte 63 can be transferred to both the front and back sides of the negative electrode sheet 62 in advance, but the solid electrolyte 63 can also be transferred to both the front and back sides of the positive electrode sheet 61 in advance.

[0056] In one example, reference Figure 2 As shown, the driving assembly 22 includes a driving member 222 and two connecting members 221. Figure 2 As shown, the two connecting members 221 are respectively connected to the two ends of the corresponding heating plates 21 along the second direction 32. The second direction 32 is perpendicular to the stacking direction, and the first direction 31 is perpendicular to the second direction 32.

[0057] The driving member 222 is used to drive the corresponding two connecting members 221 to move synchronously. For example, the driving member 222 can drive the two connecting members 221 to move up and down synchronously.

[0058] In this way, the driving member 222 can drive the two connecting members 221 to drive the heating plate 21 to move synchronously at both ends along the second direction 32, so that the pressure of the heating plate 21 on both ends of the positive electrode sheet 61 or the negative electrode sheet 62 when pressing down can be relatively uniform, avoiding the situation where only one end of the two ends between the positive electrode sheet 61 and the negative electrode sheet 62 located below the heating plate 21 along the second direction 32 is loaded and hot pressed together or the pressure at both ends is uneven, resulting in poor composite hot pressing effect, which may cause misalignment between adjacent positive electrode sheets 61 and negative electrode sheets 62 during subsequent transfer, hot pressing and other processes.

[0059] In one example, reference Figure 2 As shown, the drive assembly 22 may include a first support portion 2221 and a second support portion 2222. The number of first support portions 2221 matches the number of connectors 221, and the first support portions 2221 and the connectors 221 correspond one to one. For example, the number of first support portions 2221 and the number of connectors 221 may both be two. The first support portion 2221 may be connected to the second support portion 2222 and the corresponding connector 221.

[0060] In order to achieve synchronous lifting of the two connecting members 221 in the drive assembly 22, in one example, the second support portion 2222 can be connected to a lifting drive mechanism, which can be a pneumatic push rod, a hydraulic push rod, or a screw slider mechanism. The lifting drive mechanism drives the second support portion 2222 to rise and fall, thereby driving the synchronous lifting of the two first support portions 2221 and the two connecting members 221, and further driving the synchronous lifting of the two ends of the heating plate 21.

[0061] In one example, the first support part 2221 can be a lifting drive mechanism. For example, the first support part 2221 can be a pneumatic push rod, a hydraulic push rod or a screw slider mechanism. The drive of the two first support parts 2221 can drive the two connecting parts 221 to rise and fall synchronously, thereby driving the two ends of the heating plate 21 to rise and fall synchronously.

[0062] For example, if the first support portion 2221 is a pneumatic push rod, the first support portion 2221 can extend along the stacking direction, and the fixed portion of the first support portion 2221 can be fixedly connected to the corresponding second support portion 2222, and the movable portion of the first support portion 2221 can be fixedly connected to the corresponding connecting member 221. Thus, the synchronous extension and retraction of the two first support portions 2221 can drive the two connecting members 221 to rise and fall synchronously.

[0063] Furthermore, when the first supporting portion 2221 is a lifting drive mechanism, the second supporting portion 2222 may be a fixed or movable platform, or the ground, etc.

[0064] In one example, the driving assembly 22 can also drive the corresponding heating plate 21 to leave or return to above the electrode stacking area 11 . For example, the driving assembly 22 can also drive the corresponding heating plate 21 to move along the first direction 31 .

[0065] For example, the first support portion 2221 may be a lifting drive mechanism, and the second support portion 2222 may be a platform movable along the first direction 31. The second support portion 2222 may be connected to a translation drive mechanism, such as a pneumatic push rod, a hydraulic push rod, or a screw-slider mechanism, which can drive the second support portion 2222 to move along the first direction 31.

[0066] For example, the translation drive mechanism is a pneumatic push rod. The translation drive mechanism can extend in the first direction 31. The fixed portion of the translation drive mechanism can be fixedly connected to the lamination table 1 or the ground, and the movable portion of the translation drive mechanism can be fixedly connected to the second support portion 2222. Thus, the extension and retraction of the translation drive mechanism can drive the second support portion 2222 to move in the first direction, thereby driving the heating plate 21 to move away from or back to above the electrode stacking area 11 in the first direction 31.

[0067] In this way, when the positive electrode sheet 61 or the negative electrode sheet 62 is placed from top to bottom, the heating plate 21 can be avoided from causing interference.

[0068] In one example, reference Figure 3 As shown, the driving assembly 22 includes at least three connecting members 221. Among the at least three connecting members 221, at least two connecting members 221 are respectively connected to the two ends of the corresponding heating plate 21 along the second direction 32, and at least one connecting member 221 is connected to the middle of the corresponding heating plate 21.

[0069] For example Figure 3 As shown, each driving assembly 22 may include three connecting members 221 , wherein two connecting members 221 are respectively connected to the two ends of the corresponding heating plate 21 along the second direction 32 , and another connecting member 221 is connected to the middle of the corresponding heating plate 21 .

[0070] For another example, each driving assembly 22 may further include four connecting members 221. Two connecting members 221 are respectively connected to the ends of the corresponding heating plate 21 along the second direction 32, and the other two connecting members 221 may be spaced apart along the second direction 32 and connected to the middle of the corresponding heating plate 21.

[0071] For another example, each drive assembly 22 may include five connectors 221. Two of the connectors 221 may be connected to the ends of the corresponding heating plate 21 along the second direction 32, respectively, and the other three connectors 221 may be spaced apart along the second direction 32 and connected to the middle of the corresponding heating plate 21. Alternatively, four of the connectors 221 may be located in pairs at the ends of the heating plate 21 along the second direction 32 and connected to corresponding ends of the heating plate 21, and one of the connectors 221 may be connected to the middle of the corresponding heating plate 21.

[0072] The driving member 222 is used to drive the corresponding at least three connecting members 221 to move synchronously. For example, the driving member 222 can be used to drive the corresponding at least three connecting members 221 to move up and down synchronously, and can also drive the at least three connecting members 221 to move synchronously along the first direction 31.

[0073] As described above, the uniformity of the pressure applied by the heating plate 413 to the electrode sheets can be improved, which is beneficial to improving the composite hot pressing effect between the positive electrode sheet 61 and the negative electrode sheet 62 and avoiding misalignment between adjacent positive electrode sheets 61 and negative electrode sheets 62.

[0074] In one example, reference Figure 2 and Figure 4 As shown, the connecting member 221 includes a first connecting portion 2211 and a second connecting portion 2212 connected to each other. The first connecting portion 2211 is connected to the heating plate 21 , and the second connecting portion 2212 is connected to the driving member 222 .

[0075] The first connecting portion 2211 can be made of a material with high strength, high toughness, high temperature resistance, and poor thermal conductivity, such as Teflon or epoxy vinyl ester resin, to prevent the high temperature of the heating plate 21 from being transferred to the driver 222 and affecting the service life of the driver 222. The second connecting portion 2212 can be made of metal to ensure the strength of the connecting portion 221.

[0076] For example, the first connection part 2211 and the heating plate 21 can be fixedly connected together by bolts, screws, etc., and the second connection part 2212 can be fixedly connected to the movable part of the first support part 2221 of the driving member 222 by welding, bolts, etc.

[0077] In one example, Figure 2 As shown, the first connection portion 2211 and the second connection portion 2212 can be fixedly connected together by bolts, screws, etc.

[0078] In one example, Figure 4 As shown, the first connection portion 2211 can be covered on the outside of the second connection portion 2212 to achieve a fixed connection between the first connection portion 2211 and the second connection portion 2212.

[0079] In one example, reference Figure 4 and Figure 5 As shown, the heating plate 21 has an anti-adhesion layer 211 on both the upper and lower surfaces. For example, a ceramic film can be plated on the upper and lower surfaces of the heating plate 21 as the anti-adhesion layer 211, or the upper and lower surfaces of the heating plate 21 can be mirror-polished to form the anti-adhesion layer 211. In this way, the heating plate 21 can be prevented from adhering to the electrode, which would cause damage to the electrode due to the movement of the heating plate 21 when the heating plate 21 needs to be separated from the electrode.

[0080] In one example, reference Figure 6 and Figure 7 As shown, the electrode stacking area 11 has a plurality of vacuum adsorption holes 111 distributed at intervals, and the vacuum adsorption holes 111 are all connected to the vacuum generating device 5. Figure 7 As shown, the vacuum generating device 5 can be installed in the stacking table 1 and connected to each vacuum adsorption hole 111 through a pipeline. Thus, the vacuum generating device 5 can generate negative pressure in the vacuum adsorption hole 111 by sucking the vacuum adsorption hole 111. When the electrode is placed in the electrode stacking area 11, the vacuum adsorption hole 111 can generate a certain suction force on the electrode to prevent the position of the electrode from shifting, thereby helping to prevent the electrode from being misaligned.

[0081] In one example, reference Figure 8 As shown, the solid-state battery manufacturing equipment may also include a positive electrode sheet positioning mechanism 71, a negative electrode sheet positioning mechanism 72 and a stacking robot 73. Among them, the positive electrode sheet positioning mechanism 71 is used to place the positive electrode sheet 61 and position the positive electrode sheet 61 to ensure that each positive electrode sheet 61 placed on the positive electrode sheet positioning mechanism 71 is fixed in position on the horizontal plane. The negative electrode sheet positioning mechanism 72 is used to place the negative electrode sheet 62 and position the negative electrode sheet 62 to ensure that each negative electrode sheet 62 placed on the negative electrode sheet positioning mechanism 72 is fixed in position on the horizontal plane. For example, the positive electrode sheet positioning mechanism 71 and the negative electrode sheet positioning mechanism 72 can be positioned using a mechanical positioning system or a visual positioning system.

[0082] The stacking robot 73 includes a translation unit and two suction members. The translation unit can move in the third direction. The positive electrode sheet positioning mechanism 71 and the negative electrode sheet positioning mechanism 72 are respectively located at the ends of the stacking platform 1 in the third direction. The two suction members are installed on the translation unit at intervals along the third direction. Both suction members can move in the stacking direction on the translation unit. The positions of the two suction members match the positions of the positive electrode sheet positioning mechanism 71, the electrode stacking area 11, and the negative electrode sheet positioning mechanism 72.

[0083] In this way, the two adsorbents can be moved simultaneously to the top of the positive electrode sheet positioning mechanism 71 and the electrode sheet stacking area 11 or to the top of the negative electrode sheet positioning mechanism 72 and the electrode sheet stacking area 11. Thus, the two adsorbents can respectively adsorb the positive electrode sheet 61 or the negative electrode sheet 62 from the positive electrode sheet positioning mechanism 71 or the negative electrode sheet positioning mechanism 72 onto the adsorbents by vacuum adsorption. Moreover, when one adsorbent moves to the top of the positive electrode sheet positioning mechanism 71 to adsorb the positive electrode sheet 61, the other adsorbent can move to the electrode sheet stacking area 11 to place the adsorbed negative electrode sheet 62 on the electrode sheet stacking area 11. When one adsorbent moves to the top of the negative electrode sheet positioning mechanism 72 to adsorb the negative electrode sheet 62, the other adsorbent can move to the electrode sheet stacking area 11 to place the adsorbed positive electrode sheet 61 on the electrode sheet stacking area 11.

[0084] Thus, the positive electrode sheets 61 and the negative electrode sheets 62 can be stacked continuously and alternately in the electrode sheet stacking area 11 , which is beneficial to improving the production efficiency of the solid-state battery.

[0085] And, reference Figure 9 and Figure 10 As shown, in order to facilitate the stacking of the positive electrode sheet 61 and the negative electrode sheet 62 , the solid electrolyte 63 can be transferred in advance to the front and back sides of the negative electrode sheet 62 , or transferred in advance to the front and back sides of the positive electrode sheet 61 .

[0086] In one example, continue with reference to Figure 8 As shown, the solid-state battery manufacturing equipment may further include a positive electrode sheet clip loading mechanism 74, a negative electrode sheet clip loading mechanism 75, and two electrode sheet transfer manipulators 76. The positive electrode sheet clip loading mechanism 74 is used to fix the clip or fixture containing the positive electrode sheet 61, and the negative electrode sheet clip loading mechanism 75 is used to fix the clip or fixture containing the negative electrode sheet 62. The solid electrolyte 63 may be transferred onto both the front and back surfaces of the positive electrode sheet 61 or the solid electrolyte 63 may be transferred onto both the front and back surfaces of the negative electrode sheet 62.

[0087] Continue to refer Figure 8 As shown, the two electrode sheet transfer robots 76 can correspond to the positive electrode sheet clip loading mechanism 74 and the negative electrode sheet clip loading mechanism 75 respectively. One electrode sheet transfer robot 76 can transfer the positive electrode sheet 61 in the positive electrode sheet clip loading mechanism 74 to the positive electrode sheet positioning mechanism 71 by vacuum adsorption, and the other electrode sheet transfer robot 76 can transfer the negative electrode sheet 62 in the negative electrode sheet clip loading mechanism 75 to the negative electrode sheet positioning mechanism 72 by vacuum adsorption.

[0088] This will help further improve the production efficiency of solid-state batteries.

[0089] In one example, the positive electrode sheet clip feeding mechanism 74 and the negative electrode sheet clip feeding mechanism 75 both have a dust removal mechanism and a brush mechanism, so as to remove dust from the corresponding positive electrode sheet 61 or negative electrode sheet 62 .

[0090] In one example, the electrode transfer robot 76 can generate vibrations when transferring the corresponding positive electrode sheet 61 or negative electrode sheet 62. This can thereby shake off any excess positive electrode sheet 61 or negative electrode sheet 62 that may have been attracted to it. For example, the electrode transfer robot 76 can have a vibrator, and the vibrator can be activated when the electrode transfer robot 76 transfers the corresponding positive electrode sheet 61 or negative electrode sheet 62.

[0091] In one example, continue with reference to Figure 8 As shown, the solid-state battery manufacturing equipment may further include a bare cell transfer robot 77, a hot pressing loading robot 78, and a hot pressing mechanism 79. The bare cell transfer robot 77 can transfer the stacked bare cells 6 on the electrode stacking area 11 to the hot pressing loading robot 78 by clamping. The hot pressing loading robot 78 can load the bare cells 6 into the hot pressing mechanism 79 for further hot pressing, thereby hot pressing and compacting the bare cells 6 as a whole.

[0092] In one example, continue with reference to Figure 8 As shown, the solid-state battery manufacturing equipment may further include a hot pressing blanking robot 710 and a gluing mechanism 711. The hot pressing blanking robot 710 can transfer the bare battery cell 6 that has completed hot pressing in the hot pressing mechanism 79 to the gluing mechanism 711 for gluing the side edges. Alternatively, the hot pressing blanking robot 710 can first transfer the bare battery cell 6 that has completed hot pressing in the hot pressing mechanism 79 to the short circuit / voltage withstand test station for testing, and then transfer it to the gluing mechanism 711 for gluing the side edges.

[0093] In one example, continue with reference to Figure 8 As shown, the solid-state battery manufacturing equipment may further include a cell unloading robot 712, a cell buffer station 713, and a unloading pull belt 714. The cell unloading robot 712 can unload the glue-attached cell to the cell buffer station 713 or the unloading pull belt 714 by clamping.

[0094] In the embodiment of the present disclosure, the positive electrode sheets 61 and the negative electrode sheets 62 can be placed alternately in the electrode stacking area 11, and each time a electrode is placed, it can be pressed on the corresponding electrode by a heating plate 21, so that the electrode is composited and hot-pressed together with the other electrode sheets located below it. At the same time, since the two heating plates 21 are respectively located at opposite ends along the first direction 31 above the electrode stacking area 11, the electrode sheets alternately placed in the electrode stacking area 11 can be composited and hot-pressed together through the opposite ends through the alternating hot pressing of the two heating plates 21. The bare battery cell 6 obtained in this way will not have the problem of misalignment between adjacent positive electrode sheets 61 and negative electrode sheets 62 during subsequent transfer, hot pressing and other processes, thereby improving the overall alignment of the battery cell and the safety performance of the battery cell.

[0095] Second, reference Figure 11 As shown, a solid-state battery manufacturing method is provided, which uses the solid-state battery manufacturing equipment according to any one of the first aspects, and the method includes:

[0096] The first hot pressing step 401 includes placing the n-2 electrode sheet in the electrode sheet stacking area 11, and placing the n-1 electrode sheet on the n-2 electrode sheet. The first heating plate 21 is pressed down to the first end of the n-1 electrode sheet, so that the first end of the n-1 electrode sheet and the first end of the n-2 electrode sheet are compositely hot pressed together. In this way, one side of the first and second electrode sheets can be compositely hot pressed together first.

[0097] The judgment step 402 includes: judging whether n=m+1 or n=m. When n=m+1, the first forming step 409 is performed. When n=m, the second forming step 410 is performed. When n≠m+1 and n≠m, n=n+2 is set, and the judgment step 402 is performed until the second end release step 408 is performed, and the judgment step 402 is performed again. It can be judged whether the number of positive electrode sheets 61 and negative electrode sheets 62 on the electrode sheet stacking area 11 meets the set requirements for forming the bare battery cell 6.

[0098] The first lamination step 403 includes placing the nth electrode piece on the n-1th electrode piece when the first heating plate 21 has been pressed against the first end of the n-1th electrode piece. Pressing the first heating plate 21 against the first end of the n-1th electrode piece prevents the n-1th electrode piece and the electrode piece below it from shifting.

[0099] The second end hot pressing step 404 includes: pressing the second heating plate 21 down to the second end of the n-th electrode piece, so that the second end of the n-th electrode piece and the second end of the (n-1)-th electrode piece are compositely hot pressed together.

[0100] The first end release step 405 includes: the first heating plate 21 moves upward, the second heating plate 21 presses the second end of the nth pole piece, and then the first heating plate 21 is moved away, so as to prevent the nth pole piece and the pole piece below from shifting.

[0101] The second lamination step 406 includes placing the (n+1)th electrode on the nth electrode when the second heating plate 21 is already pressed against the second end of the nth electrode. Pressing the second heating plate 21 against the second end of the nth electrode prevents the nth electrode and the electrode below from shifting.

[0102] The first end hot pressing step 407 includes: pressing the first heating plate 21 down to the first end of the (n+1)th electrode piece, so that the first end of the (n+1)th electrode piece and the first end of the nth electrode piece are hot pressed together.

[0103] The second end release step 408 includes: the second heating plate 21 moves upward. The first heating plate 21 presses against the first end of the (n+1)th electrode piece, and then the second heating plate 21 moves away, thereby preventing the (n+1)th electrode piece and the electrode piece below it from shifting.

[0104] The first forming step 409 includes: the second heating plate 21 is pressed down to the second end of the mth electrode piece, so that the second end of the mth electrode piece and the second end of the m-1th electrode piece are compositely hot-pressed together, thereby obtaining a bare cell 6 of the solid-state battery.

[0105] The second forming step 410 includes: after executing the first lamination step 403 to the first end release step 405, the first heating plate 21 is pressed down to the first end of the mth electrode piece, so that the first end of the mth electrode piece and the first end of the m-1th electrode piece are compositely hot-pressed together, thereby obtaining a bare cell 6 of the solid-state battery.

[0106] The polarities of adjacent pole pieces are opposite, n and m are both positive integers, n≥3, m≥2, and in the first hot pressing step 401, n-2<m.

[0107] In one example, the drive assembly 22 can also drive the corresponding heating plate 21 to leave or return to the top of the electrode stacking area 11. For example, the drive assembly 22 can also drive the corresponding heating plate 21 to move along the first direction 31. The manufacturing method of the solid-state battery includes the following steps:

[0108] The first hot pressing step 401 includes: placing the n-2th electrode in the electrode stacking area 11, and placing the n-1th electrode on the n-2th electrode, moving the second end of the first heating plate 21 along the first direction 31 to above the first end of the electrode stacking area 11, and pressing down to the first end of the n-1th electrode, so that the first end of the n-1th electrode and the first end of the n-2th electrode are compositely hot pressed together.

[0109] Determination step 402 includes determining whether n = m + 1 or n = m. When n = m + 1, first forming step 409 is performed. When n = m, second forming step 410 is performed. When n ≠ m + 1 and n ≠ m, n = n + 2 is set, and determination step 402 is performed until second end release step 408 is performed, after which determination step 402 is performed again.

[0110] The first lamination step 403 includes: when the first heating plate 21 has been pressed against the first end of the (n-1)th electrode piece, placing the nth electrode piece on the (n-1)th electrode piece.

[0111] The second end hot pressing step 404 includes: the second heating plate 21 moves along the first end of the first direction 31 to above the electrode stacking area 11, and presses down to the second end of the nth electrode, so that the second end of the nth electrode and the second end of the n-1th electrode are compositely hot pressed together.

[0112] The first end releasing step 405 includes: the first heating plate 21 moves upward and leaves the top of the electrode stacking area 11 along the first end of the first direction 31 .

[0113] The second lamination step 406 includes: when the second heating plate 21 has been pressed against the second end of the nth electrode piece, placing the (n+1)th electrode piece on the nth electrode piece.

[0114] The first-end hot pressing step 407 includes: the first heating plate 21 moves along the second end of the first direction 31 to above the electrode stacking area 11, and presses down to the first end of the n+1th electrode, so that the first end of the n+1th electrode and the first end of the nth electrode are compositely hot pressed together.

[0115] The second end releasing step 408 includes: the second heating plate 21 moves upward and leaves the top of the electrode stacking area 11 along the second end of the first direction 31 .

[0116] The first forming step 409 includes: the second heating plate 21 moves along the first end of the first direction 31 to above the electrode stacking area 11, and presses down to the second end of the mth electrode, so that the second end of the mth electrode and the second end of the m-1th electrode are compositely hot-pressed together, thereby obtaining a bare cell 6 of the solid-state battery.

[0117] The second forming step 410 includes: after executing the first stacking step 403 to the first end release step 405, the first heating plate 21 moves along the second end of the first direction 31 to above the electrode stacking area 11, and presses down to the first end of the mth electrode, so that the first end of the mth electrode and the first end of the m-1th electrode are compositely hot-pressed together, thereby obtaining a bare cell 6 of the solid-state battery.

[0118] The polarities of adjacent pole pieces are opposite, n and m are both positive integers, n≥3, m≥2, and in the first hot pressing step 401, n-2<m.

[0119] In this way, when the positive electrode sheet 61 or the negative electrode sheet 62 is placed from top to bottom, the heating plate 21 can be avoided from causing interference.

[0120] In the embodiment of the present disclosure, the positive electrode sheets 61 and the negative electrode sheets 62 can be placed alternately in the electrode stacking area 11, and each time a electrode is placed, it can be pressed on the corresponding electrode by a heating plate 21, so that the electrode is composited and hot-pressed together with the other electrode sheets located below it. At the same time, since the two heating plates 21 are respectively located at opposite ends along the first direction 31 above the electrode stacking area 11, the electrode sheets alternately placed in the electrode stacking area 11 can be composited and hot-pressed together through the opposite ends through the alternating hot pressing of the two heating plates 21. The bare battery cell 6 obtained in this way will not have the problem of misalignment between adjacent positive electrode sheets 61 and negative electrode sheets 62 during subsequent transfer, hot pressing and other processes, thereby improving the overall alignment of the battery cell and the safety performance of the battery cell.

[0121] In a third aspect, a solid-state battery is provided, which includes a bare cell 6 obtained by using the method for using the solid-state battery manufacturing equipment of the second aspect.

[0122] In the embodiment of the present disclosure, the positive electrode sheets 61 and the negative electrode sheets 62 can be placed alternately in the electrode stacking area 11, and each time a electrode is placed, it can be pressed on the corresponding electrode by a heating plate 21, so that the electrode is composited and hot-pressed together with the other electrode sheets located below it. At the same time, since the two heating plates 21 are respectively located at opposite ends along the first direction 31 above the electrode stacking area 11, the electrode sheets alternately placed in the electrode stacking area 11 can be composited and hot-pressed together through the opposite ends through the alternating hot pressing of the two heating plates 21. The bare battery cell 6 obtained in this way will not have the problem of misalignment between adjacent positive electrode sheets 61 and negative electrode sheets 62 during subsequent transfer, hot pressing and other processes, thereby improving the overall alignment of the battery cell and the safety performance of the battery cell.

[0123] In a fourth aspect, a battery pack is provided, comprising the solid-state battery according to the third aspect.

[0124] In the embodiment of the present disclosure, the positive electrode sheets 61 and the negative electrode sheets 62 can be placed alternately in the electrode stacking area 11, and each time a electrode is placed, it can be pressed on the corresponding electrode by a heating plate 21, so that the electrode is composited and hot-pressed together with the other electrode sheets located below it. At the same time, since the two heating plates 21 are respectively located at opposite ends along the first direction 31 above the electrode stacking area 11, the electrode sheets alternately placed in the electrode stacking area 11 can be composited and hot-pressed together through the opposite ends through the alternating hot pressing of the two heating plates 21. The bare battery cell 6 obtained in this way will not have the problem of misalignment between adjacent positive electrode sheets 61 and negative electrode sheets 62 during subsequent transfer, hot pressing and other processes, thereby improving the overall alignment of the battery cell and the safety performance of the battery cell.

[0125] In a fifth aspect, a vehicle is provided, comprising the battery pack according to the fourth aspect.

[0126] In the embodiment of the present disclosure, the positive electrode sheets 61 and the negative electrode sheets 62 can be placed alternately in the electrode stacking area 11, and each time a electrode is placed, it can be pressed on the corresponding electrode by a heating plate 21, so that the electrode is composited and hot-pressed together with the other electrode sheets located below it. At the same time, since the two heating plates 21 are respectively located at opposite ends along the first direction 31 above the electrode stacking area 11, the electrode sheets alternately placed in the electrode stacking area 11 can be composited and hot-pressed together through the opposite ends through the alternating hot pressing of the two heating plates 21. The bare battery cell 6 obtained in this way will not have the problem of misalignment between adjacent positive electrode sheets 61 and negative electrode sheets 62 during subsequent transfer, hot pressing and other processes, thereby improving the overall alignment of the battery cell and the safety performance of the battery cell.

[0127] It should be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0128] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0129] In the description of this specification, reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application.

[0130] The above are merely embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A solid-state battery manufacturing device, characterized in that: The solid-state battery production equipment comprises a lamination table (1) and a hot pressing mechanism (2); The upper surface of the lamination platform (1) has a pole piece stacking area (11), and the pole piece stacking area (11) is used for stacking pole pieces; The hot pressing mechanism (2) comprises two heating plates (21) and two driving components (22); The two heating plates (21) are respectively located above the electrode stacking area (11) at two opposite ends along a first direction (31), wherein the first direction (31) is perpendicular to the stacking direction of the electrode pieces; The two driving components (22) correspond to the two heating plates (21) respectively, and are used to drive the corresponding heating plates (21) to move up and down at the corresponding two ends above the electrode stacking area (11), so that the two heating plates (21) can be alternately pressed on the electrodes stacked in the electrode stacking area (11).

2. The solid-state battery manufacturing equipment according to claim 1, characterized in that: The driving assembly (22) includes a driving member (222) and two connecting members (221); The two connecting members (221) are respectively connected to the two ends of the corresponding heating plate (21) along the second direction (32); The driving member (222) is used to drive the corresponding two connecting members (221) to move synchronously; The second direction (32) is perpendicular to the stacking direction, and the first direction (31) is perpendicular to the second direction (32).

3. The solid-state battery manufacturing equipment according to claim 2, characterized in that: The driving assembly (22) includes at least three connecting members (221); Among the at least three connecting members (221), at least two of the connecting members (221) are respectively connected to the two ends of the corresponding heating plate (21) along the second direction (32), and at least one of the connecting members (221) is connected to the middle of the corresponding heating plate (21); The driving member (222) is used to drive the corresponding at least three connecting members (221) to move synchronously.

4. The solid-state battery manufacturing equipment according to claim 2, characterized in that: The connecting member (221) comprises a first connecting portion (2211) and a second connecting portion (2212) connected to each other, wherein the first connecting portion (2211) is connected to the heating plate (21), and the second connecting portion (2212) is connected to the driving member (222).

5. The solid-state battery manufacturing equipment according to claim 1, characterized in that: The heating plate (21) has an anti-adhesion layer (211) on both the upper and lower surfaces.

6. The solid-state battery manufacturing equipment according to claim 1, characterized in that: The pole piece stacking area (11) has a plurality of vacuum adsorption holes (111) distributed at intervals, and the vacuum adsorption holes (111) are all connected to the vacuum generating device (5).

7. A method for manufacturing a solid-state battery, characterized in that: The method uses the solid-state battery manufacturing equipment according to any one of claims 1 to 6, and the method includes: The first hot pressing step (401) comprises: placing the n-2th electrode piece in the electrode piece stacking area (11), and placing the n-1th electrode piece on the n-2th electrode piece, and pressing the first heating plate (21) down to the first end of the n-1th electrode piece, so that the first end of the n-1th electrode piece and the first end of the n-2th electrode piece are compositely hot pressed together; The judging step (402) includes: judging whether n=m+1 or n=m; wherein, when n=m+1, executing the first forming step (409); when n=m, executing the second forming step (410); when n≠m+1 and n≠m, setting n=n+2, and executing the judging step (402) until the second end releasing step (408), and then executing the judging step (402) again; The first lamination step (403) comprises: when the first heating plate (21) has been pressed against the first end of the n-1th electrode piece, placing the nth electrode piece on the n-1th electrode piece; The second end hot pressing step (404) comprises: pressing the second heating plate (21) downward to the second end of the n-th electrode piece, so that the second end of the n-th electrode piece and the second end of the n-1-th electrode piece are hot pressed together; The first end releasing step (405) comprises: the first heating plate (21) moves upward; The second lamination step (406) comprises: when the second heating plate (21) has been pressed against the second end of the nth electrode, placing the (n+1)th electrode on the nth electrode; The first end hot pressing step (407) comprises: pressing the first heating plate (21) downward to the first end of the n+1th electrode piece, so that the first end of the n+1th electrode piece and the first end of the nth electrode piece are hot pressed together; The second end releasing step (408) includes: the second heating plate (21) moves upward; The first forming step (409) includes: pressing the second heating plate (21) downward to the second end of the m-th electrode piece, so that the second end of the m-th electrode piece and the second end of the m-1-th electrode piece are compositely hot-pressed together, thereby obtaining a bare cell (6) of the solid-state battery; The second forming step (410) includes: after executing the first lamination step (403) to the first end releasing step (405), the first heating plate (21) is pressed down to the first end of the m-th electrode piece, so that the first end of the m-th electrode piece and the first end of the m-1-th electrode piece are compositely hot-pressed together, thereby obtaining a bare cell (6) of the solid-state battery; Wherein, the polarities of adjacent pole pieces are opposite, n and m are both positive integers, n≥3, m≥2, and in the first hot pressing step (401), n-2<m.

8. A solid-state battery, characterized in that: The solid-state battery comprises a bare cell (6) obtained by the solid-state battery manufacturing method according to claim 7.

9. A battery pack, characterized in that: The battery pack includes the solid-state battery as claimed in claim 8.

10. A vehicle, characterized in that: The vehicle includes the battery pack according to claim 9.

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