Platform mechanism

Abstract

The utility model discloses a platform mechanism. A first platen of the platform mechanism is provided with a first position located on the lower portion and a second position located on the upper portion, and a second platen is provided with a third position transversely far away from a third platen and a fourth position transversely close to the third platen. And the upper wall surfaces of the first bedplate, the second bedplate and the third bedplate jointly form a supporting surface for supporting the battery cell assembly. When the first table plate is switched between the first position and the second position, the second table plate can move in the direction away from the first table plate and close to the first table plate, so that the friction loss of the first table plate and the second table plate in the position switching process is effectively reduced, and the second table plate can abut against the first table plate in the transverse direction; according to the technical scheme, the gap between the first plate and the second plate can be effectively reduced, and the hot pressing quality of the platform mechanism is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery core manufacturing, in particular to a platform mechanism. Background Art

[0002] In the production of lithium batteries, the structure of the pole pieces and diaphragms is relatively loose after winding or stacking. Therefore, it is generally necessary to perform hot pressing and shaping on the pole pieces and diaphragms. Hot pressing can make the internal contact of the lithium battery cell components close, the pole pieces are arranged neatly, and have good performance during long-term use. During hot pressing, the working effect of the hot pressing device will directly affect the production efficiency and hot pressing yield of the lithium battery. In order to facilitate the removal of the cell components after hot pressing, the hot pressing platform often adopts a block design that can be raised and lowered. However, in the prior art, with long-term repeated lifting and lowering, the edges of the plates of each part of the hot pressing platform will continue to wear, and the spacing between the parts of the hot pressing platform will gradually increase, which will cause larger gaps in the hot pressing platform, seriously affecting the hot pressing quality of the cell components. Utility Model Content

[0003] The main purpose of the utility model is to provide a platform mechanism, which can effectively reduce the wear of the platform and improve the hot pressing quality.

[0004] To achieve the above-mentioned purpose, the utility model proposes a platform mechanism, which includes a bearing platform and a linkage assembly. The bearing platform includes a first platen, a second platen and a third platen. In the horizontal direction, the first platen is located between the second platen and the third platen. The first platen has a first position located below and a second position located above. The second platen has a third position located laterally away from the third platen and a fourth position located laterally close to the third platen. When the first platen is located at the first position and the second platen is located at the fourth position, the upper wall surfaces of the first platen, the second platen and the third platen together constitute a supporting surface for supporting the battery cell assembly. The linkage assembly includes a first linkage part and a second linkage part, the first linkage part is connected to the first platen, and the second linkage part is connected to the second platen. Among them, when the first linkage part drives the first platen to switch between the first position and the second position, the first linkage part can drive the second linkage part so that the second platen can switch between the third position and the fourth position.

[0005] In some embodiments, the first linkage portion includes a pushing member, the second linkage portion includes an abutment member, the supporting platform includes a first elastic member, the first elastic member is connected to the second platform, and the pushing member is configured to push the abutment member laterally when the first platform switches from the second position to the first position, so as to switch the second platform to the third position; when the first platform is in the first position, the pushing member is separated from the abutment member, and the first elastic member is configured to enable the second platform to switch from the third position to the fourth position.

[0006] In some embodiments, the pushing member includes a first wall and a second wall, the first wall is perpendicular to the supporting surface, the second wall is cross-arranged with the first wall, the second wall is connected to the first wall and extends toward the side of the first wall away from the abutment member.

[0007] In some embodiments, the first linkage portion further includes a sliding member and a driving member, the first platform is connected to the sliding member, and the driving member is used to drive the first platform to slide on the sliding member along a vertical direction.

[0008] In some embodiments, the second linkage portion also includes a first plate, which limits a first groove. One end of the abutment member is connected to the second platform and the other end is used to abut against the pushing member. When the second platform is in the third position, the end of the abutment member facing away from the second platform can be inserted into the first groove.

[0009] In some embodiments, the abutment member includes a second plate and a guide column, the second plate is connected to the second platform, the guide column is connected to one end of the second plate facing away from the second platform, and in the horizontal direction, one end of the guide column is used to abut against the pushing member, and the other end is used to abut against the wall of the first groove.

[0010] In some embodiments, the supporting platform also includes a third plate, which is arranged on the side of the second plate away from the third plate, one end of the first elastic member is connected to the third plate and the other end is connected to the second plate, and when the second plate is in the third position, the first elastic member is compressed.

[0011] In some embodiments, the third platen has a fifth position laterally away from the second platen and a sixth position laterally close to the second platen, and when the first platen is in the first position and the third platen is in the sixth position, the upper wall surfaces of the first platen, the second platen and the third platen together constitute a support surface for supporting the battery cell assembly. The linkage assembly also includes a third linkage part, and the third linkage part is connected to the third platen. When the first linkage part drives the first platen to switch between the first position and the second position, the first linkage part can drive the third linkage part so that the third platen can switch between the fifth position and the sixth position.

[0012] In some embodiments, the carrying platform includes a second elastic member, the second elastic member is connected to the third platform, and the second elastic member is configured to enable the second platform to switch from the fifth position to the sixth position.

[0013] In some embodiments, the first platform includes a third wall and a fourth wall arranged opposite to each other. When the first platform is in the first position, the third wall abuts against the second platform, and the fourth wall abuts against the third platform, wherein the third wall and the fourth wall are respectively perpendicular to the support surface.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] In the technical solution of the utility model, the first platen has a first position located at the bottom and a second position located at the top, the second platen has a third position laterally away from the third platen and a fourth position laterally close to the third platen, when the first platen is at the first position and the second platen is at the fourth position, the upper wall surfaces of the first platen, the second platen and the third platen together constitute a support surface for supporting the battery cell assembly. When the first linkage part drives the first platen to switch between the first position and the second position, the first linkage part can drive the second linkage part so that the second platen can switch between the fourth position and the third position. When the first platen switches between the first position and the second position, the second platen can move in the direction away from the first platen and close to the first platen, thereby effectively reducing the friction loss between the first platen and the second platen during the position switching process, and the second platen can abut against the first platen in the horizontal direction to reduce the gap. The technical solution of the present application can effectively reduce the gap between the first platen and the second platen, and improve the hot pressing quality of the platform mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the assembly structure of the platform mechanism in the embodiment of the utility model, wherein the first platform is located at the second position;

[0018] Figure 2 For this utility model Figure 1 A partial enlarged schematic diagram of the platform mechanism at location I in the embodiment;

[0019] Figure 3 It is a partial structural schematic diagram of the first platform and the first linkage part of the platform mechanism in the embodiment of the utility model;

[0020] Figure 4 It is a schematic diagram of the working principle of the platform mechanism in the embodiment of the utility model, wherein the first platform is located at the first position, the second platform is located at the fourth position, and the third platform is located at the sixth position;

[0021] Figure 5 It is a schematic diagram of the working principle of the platform mechanism in the embodiment of the utility model, wherein the second platform is located at the third position and the third platform is located at the fifth position.

[0022] Description of Figure Numbers:

[0023] Platform organization 100;

[0024] The carrying platform 110; the first platform 111; the third wall 1111; the fourth wall 1112; the second platform 112; the third platform 113; the supporting surface 114; the first elastic member 115; the third plate 116; the second elastic member 117;

[0025] Linkage assembly 120; first linkage portion 121; pusher 1211; first wall 12111; second wall 12112; sliding member 1212; driving member 1213; second linkage portion 122; abutment member 1221; second plate 12211; guide post 12212; first plate 1222; first groove 1223; third linkage portion 123.

[0026] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the production of lithium batteries, the structure of the pole piece and the diaphragm is relatively loose after winding or laminating. Therefore, it is generally necessary to perform hot pressing and shaping on the pole piece and the diaphragm. Hot pressing is to heat and apply force load to the surface of the battery cell assembly of the positive pole piece, diaphragm and negative pole piece after winding or laminating. Continuous hot pressing can exhaust the air between each pole piece and the sticky film on both sides, so that the internal contact of the lithium battery battery cell assembly formed after hot pressing is tight, the pole pieces are arranged neatly, and it has good performance during long-term use. Hot pressing can effectively improve the quality of the battery. Hot pressing is an important link in the assembly of lithium-ion batteries. The working effect of the hot pressing device will directly affect the production efficiency and hot pressing yield rate of lithium batteries. In order to facilitate the removal of the battery cell assembly after hot pressing, the hot pressing platform often adopts a block design that can be lifted and lowered. However, in the prior art, with long-term repeated lifting and lowering, the edges of the plates of each part of the hot pressing platform will continue to be worn, and the spacing between the parts of the hot pressing platform will gradually increase, which will cause a large gap in the hot pressing platform, seriously affecting the hot pressing quality of the battery cell assembly.

[0029] To solve the above technical problems, Figures 1 to 5 As shown, the present application proposes a platform mechanism 100, which includes a carrying platform 110 and a linkage.

[0030] like Figure 1 as well as Figure 4 As shown, the carrying platform 110 includes a first platen 111, a second platen 112 and a third platen 113. In the horizontal direction, the first platen 111 is located between the second platen 112 and the third platen 113. According to the use requirements, the horizontal direction refers to the direction parallel to the hot pressing plane of the platform mechanism 100, and preferably, the horizontal direction can be a horizontal direction.

[0031] like Figure 1 as well as Figure 4 As shown, the first platform 111 has a first position located at the bottom and a second position located at the top. The first platform 111 can be separated from the second platform 112 and the third platform 113 and switch between the first position and the second position. Preferably, the first platform 111 can switch between the first position and the second position along the vertical direction. The vertical direction refers to the direction perpendicular to the human body plane.

[0032] like Figure 4 as well as Figure 5 As shown, the second platen 112 has a third position laterally away from the third platen 113 and a fourth position laterally close to the third platen 113. Since the first platen 111 is disposed between the second platen 112 and the third platen 113, the second platen 112 is laterally away from the third platen 113, that is, the second platen 112 is laterally away from the first platen 111, and the second platen 112 is laterally close to the third platen 113, that is, the second platen 112 is laterally close to the first platen 111.

[0033] like Figure 1 , Figure 4 as well as Figure 5 As shown, when the first platen 111 is located at the first position and the second platen 112 is located at the fourth position, the upper wall surfaces of the first platen 111, the second platen 112 and the third platen 113 together constitute a support surface 114 for supporting the battery cell assembly. During the use of the platform mechanism 100, when the first platform is located at the first position below and the second platform is located at the fourth position close to the first platform, the upper wall surfaces of the first platform, the second platform and the third platform together constitute a hot pressing plane. The first platform is located at the second position above, and the battery cell assembly is lifted up by the first platform, so that the battery cell assembly can be easily removed. It should be noted that when the first platform is located at the second position, the second platform can be located at the third position or the fourth position, as long as the battery cell assembly after hot pressing can be removed normally.

[0034] like Figure 1 as well as Figure 4As shown, the linkage assembly 120 includes a first linkage part 121 and a second linkage part 122, wherein the first linkage part 121 is connected to the first platform 111, and the second linkage part 122 is connected to the second platform 112. When the first linkage part 121 drives the first platform 111 to switch between the first position and the second position, the first linkage part 121 can drive the second linkage part 122 so that the second platform 112 can switch between the third position and the fourth position. In some embodiments, the first linkage part 121 drives the first platform 111 to move from the first position to the second position, and the second linkage part 122 can drive the second platform 112 to move from the fourth position to the third position. On the contrary, when the first platform 111 moves from the second position to the first position, the second platform 112 can move from the third position to the fourth position. In some embodiments, when the first linkage part 121 drives the first platform 111 to move from the first position to the second position, the second linkage part 122 can reciprocate between the fourth position and the third position in the horizontal direction. When the first platen 111 moves from the first position to the second position, the second platen 112 can be first transported from the fourth position to the third position to facilitate the lifting of the first platen 111. After the first platen 111 moves to the second position, the second platen 112 can be restored from the third position to the fourth position. On the contrary, when the first platen 111 descends from the second position to the first position, the second platen 112 can first move from the fourth position to the third position to increase the downward pressure space of the first platen 111 and reduce the friction between the first platen 111 and the second platen 112. After the first platen 111 returns to the first position, the second platen 112 returns from the third position to the fourth position, and the second platen 112 abuts against the first platen 111, thereby effectively reducing the wear between the first platen 111 and the second platen 112 and the gap caused by the wear.

[0035] In the present application, when the first linkage part 121 drives the first platen 111 to switch between the first position and the second position, the first linkage part 121 can drive the second linkage part 122 so that the second platen 112 can switch between the third position and the fourth position. On the one hand, when the first platen 111 switches between the first position and the second position, the second platen 112 can move away from the first platen 111 and towards the first platen 111, thereby effectively reducing the friction loss between the first platen 111 and the second platen 112 during the position switching process. On the other hand, after the gap appears, the second platen 112 can abut against the first platen 111 in the horizontal direction to reduce the gap. The technical solution of the present application can effectively reduce the gap between the first platen 1222 and the second platen 12211, and improve the hot pressing quality of the platform mechanism 100.

[0036] In some embodiments, the first linkage part 121 and the second linkage part 122 can be linked in different ways. Figure 1 as well as Figure 2As shown, the first linkage part 121 may be provided with a pusher 1211, and the second linkage part 122 may be provided with an abutment 1221. When the first platform 111 moves vertically, the pusher 1211 may move relative to the first platform 111 in the horizontal direction, and the pusher 1211 abuts against the abutment 1221, thereby pushing the second platform 112 to move. The pusher 1211 may also remain relatively still with the first platform 111, and further, the pusher 1211 is provided with an inclined wall surface, and the abutment 1221 abuts against the inclined wall surface, and during the vertical movement of the pusher, the abutment 1221 moves in the horizontal direction under the action of the inclined wall surface. In order to realize the reciprocating motion of the second platform 112, the platform mechanism 100 may also be provided with different reset components. As shown in FIG**, in this embodiment, the first linkage part 121 includes a pusher 1211, the second linkage part 122 includes an abutment 1221, and the bearing platform 110 includes a first elastic member 115. The first elastic member 115 is connected to the second platform 112, and the pusher 1211 is configured to push the abutment member 1221 in the horizontal direction when the first platform 111 switches from the second position to the first position, so that the second platform 112 switches from the fourth position to the third position. When the first platform 111 is in the first position, the pusher 1211 is separated from the abutment member 1221, and the first elastic member 115 is configured to enable the second platform 112 to switch from the third position to the fourth position. Specifically, during the movement of the second platform 112 from the fourth position to the third position, the second platform 112 can compress or stretch the first elastic member 115, and after the second platform 112 moves to the third position and the pusher 1211 is separated from the abutment member 1221, the elastic force of the first elastic member 115 can cause the second platform 112 to return to the fourth position. The design of the pusher 1211, the abutment member 1221 and the first elastic member 115 makes the platform mechanism 100 compact, low-cost and easy to control.

[0037] The design of the pusher 1211 can be different according to different requirements. Figure 2As shown, in this embodiment, the pusher 1211 includes a first wall surface 12111 and a second wall surface 12112, the first wall surface 12111 is perpendicular to the support surface 114, the second wall surface 12112 is arranged crosswise with the first wall surface 12111, and the second wall surface 12112 is connected to the first wall surface 12111 and extends to the side of the first wall surface 12111 away from the abutment 1221. When the first platform 111 moves from the second position to the first position, the second wall surface 12112 first contacts the abutment 1221 and guides the abutment 1221 to drive the second platform 112 to move from the fourth position to the third position in the horizontal direction. The first platform 111 moves downward, and the abutment 1221 moves upward relative to the second wall surface 12112. When the abutment 1221 moves to the connection position between the second wall surface 12112 and the first wall surface 12111, the second platform 112 moves to the third position and causes the first elastic member 115 to generate a restoring force. The first platen 111 continues to move downward, and the abutment member 1221 contacts the first wall 12111. Since the first wall 12111 is perpendicular to the support surface 114, the abutment member 1221 and the second platen 112 remain stationary. When the abutment member 1221 abuts against the end of the first wall 12111 away from the second wall 12112, the first platen 111 continues to move downward to the first position, and the abutment member 1221 separates from the first wall 12111, that is, the abutment member 1221 separates from the push member 1211, and the push member 1211 releases the restriction on the abutment member 1221 in the lateral direction, and the first elastic member 115 drives the second platen 112 to return from the third position to the fourth position. The first platen 111 is located at the first position, and the second platen 112 is located at the fourth position. The first platen 111, the second platen 112 and the third platen 113 together constitute the support surface 114 of the battery cell assembly. It can be understood that, in some embodiments, the first wall surface 12111 of the pusher 1211 away from the second wall surface 12112 may also be provided with a guide surface intersecting with the first wall surface 12111. When the first platen 111 moves from the first position to the second position, the guide surface is used to guide the abutment member 1221 to laterally drive the second platen 112 to move away from the third platen 113. When the first platen 111 moves from the second position to the first position, the guide surface is used to guide the abutment member 1221 to drive the second platen 112 to move toward the third platen 113. The first wall surface 12111 is perpendicular to the support surface 114, and the second wall surface 12112 intersects with the first wall surface 12111. The provision of the second wall surface 12112 can improve the stability of the second platen 12211 in switching from the fourth position to the third position, and reduce the risk of damage to the flat mechanism.

[0038] In order to drive the first platform 111 to switch between the first position and the second position, the first linkage part 121 may be provided with components such as a slide rail assembly, a cylinder or a motor. Figure 3As shown, in this embodiment, the first linkage part 121 also includes a sliding member 1212 and a driving member 1213. The first platen 111 is connected to the sliding member 1212. The driving member 1213 is used to drive the first platen 111 to slide on the sliding member 1212 in the vertical direction. It can be understood that the driving member 1213 can be configured as a cylinder, and the sliding member 1212 can be configured as a slide rail assembly. The slide rail assembly includes a slide rail and a slider. The slide rail is provided with a slide groove extending vertically. The slider is clamped in the slide groove and fixedly connected to the first platen 111. The cylinder can drive the slider to drive the first platen 111 to move vertically along the slide rail. The cooperation between the sliding member 1212 and the driving member 1213 can realize the rapid and stable switching of the first platen 111 between the first position and the second position, thereby improving the stability of the battery cell stacking.

[0039] The first linkage part 121 can drive the second linkage part 122 to move. In order to improve the stability of the movement of the second linkage part 122, Figure 2 As shown, in this embodiment, the second linkage part 122 also includes a first plate 1222, and the first plate 1222 limits a first groove 1223. One end of the abutment member 1221 is connected to the second platform 112, and the other end is used to abut against the push member 1211. When the second platform 112 is in the third position, the end of the abutment member 1221 away from the second platform 112 can be inserted into the first groove 1223. It can be understood that, in the horizontal direction, the depth of the first groove 1223 can be different according to the setting of the abutment member 1221. When the second platform 112 moves from the fourth position to the third position, in the horizontal direction, one end of the abutment member 1221 abuts against the push member 1211, and the other end is inserted into the first groove 1223. The setting of the first groove 1223 can effectively improve the stability of the second platform switching between the third position and the fourth position.

[0040] The pusher 1211 drives the abutment member 1221 to move the second platen 112 in the lateral direction. To improve the stability of the connection between the abutment member 1221 and the second platen 112, the abutment member 1221 may be provided with a reinforcing rib. Figure 1 as well as Figure 2As shown, in this embodiment, the abutment member 1221 includes a second plate 12211 and a guide column 12212. The second plate 12211 is connected to the second plate 112. The guide column 12212 is connected to one end of the second plate 12211 away from the second plate 112. In the horizontal direction, one end of the guide column 12212 is used to abut against the pusher 1211, and the other end is used to abut against the wall surface of the first groove 1223. The arrangement of the second plate 12211 and the guide column 12212 can improve the stability of the connection between the abutment member 1221 and the second plate 12211, and facilitate the pusher 1211 to drive the abutment member 1221. The structure of the guide column 12212 can be different according to different needs. Specifically, the end of the guide column 12212 abutting against the pusher 1211 can be provided with a spherical end, and the end of the guide column 12212 penetrating the first groove 1223 can be set as a columnar end, which is not limited here.

[0041] In order to facilitate the first elastic member 115 to drive the second platform 112 to return from the third position to the fourth position, the platform mechanism 100 may be provided with a plate abutting against the first elastic member 115, so that the second platform 112 can compress the first elastic portion when moving from the fourth position to the third position. Figure 1 As shown, in this embodiment, the carrying platform 110 further includes a third plate 116, which is disposed on the side of the second platform 112 away from the third platform 113. One end of the first elastic member 115 is connected to the third plate 116 and the other end is connected to the second platform 112. When the second platform 112 is located at the third position, the first elastic member 115 is compressed. The abutment member 1221 is separated from the push member 1211, and the pressure of the push member 1211 on the abutment member 1221 and the second platform 112 disappears. The elastic force of the first elastic member 115 can push the second platform 112 to move from the third position to the fourth position. The cooperation between the third plate 116 and the first elastic member 115 enables the second platform 112 to stably return from the third position to the fourth position.

[0042] The platform mechanism 100 includes a first platform 111, a second platform 112, and a third platform 113. When the first platform 111 is in the first position and the second platform 112 is in the fourth position, the three together constitute a support surface 114. In order to reduce the friction loss between the first platform 111 and the third platform 113, and reduce the gap that may exist between the first platform 111 and the third platform 113, the platform mechanism 100 may be provided with a third linkage part 123, so that the third platform 113 can switch between a fifth position away from the second platform 112 and a sixth position close to the second platform 112. Figure 1As shown, in this embodiment, the third platform 113 has a fifth position laterally away from the second platform 112 and a sixth position laterally close to the second platform 112. When the first platform 111 is in the first position and the third platform 113 is in the sixth position, the upper wall surfaces of the first platform 111, the second platform 112 and the third platform 113 together constitute a support surface 114 for supporting the battery cell assembly. The linkage assembly 120 also includes a third linkage part 123, and the third linkage part 123 is connected to the third platform 113. Among them, when the first linkage part 121 drives the first platform 111 to switch between the first position and the second position, the first linkage part 121 can drive the third linkage part 123 so that the third platform 113 can switch between the fifth position and the sixth position. The switching between the fifth position and the sixth position driven by the third linkage part 123 and the switching between the third position and the fourth position driven by the second linkage part 122 have the same technical effect, which will not be repeated here.

[0043] like Figure 1 As shown, in order to facilitate the third platform 113 to return from the fifth position to the sixth position, the carrying platform 110 may include a second elastic member 117, the second elastic member 117 is connected to the third platform 113, and the second elastic member 117 is configured to enable the second platform 112 to switch from the fifth position to the sixth position. Specifically, when the third platform is in the fifth position, the second elastic part can be compressed or stretched, which will not be repeated here. The second elastic part can be any suitable material such as a spring, a spring sheet or rubber, which is not limited here.

[0044] The first platen 111, the second platen 112 and the third platen 113 together constitute the support surface 114. According to different usage requirements, the first platen 111, the second platen 112 and the third platen 113 can be respectively set as plates of different shapes. Specifically, the first plate 1222, the second plate 12211 and the third plate 116 can be configured as a rectangular plate structure, or other irregular plate structures. The two sides of the first plate 1222 in contact with the second plate 12211 and the second plate 12211 can also have different shapes. In some embodiments, the first platen 111 includes a fifth wall and a sixth wall arranged opposite to each other. When the first platen 111 is in the first position, the third wall 1111 abuts against the second platen 112, and the fourth wall 1112 abuts against the third platen 113, wherein the fifth wall and the sixth wall respectively intersect with the support surface 114, and at this time the first plate 1222 is a stepped plate. Figure 3As shown, in this embodiment, the first platen 111 includes a third wall 1111 and a fourth wall 1112 arranged opposite to each other. When the first platen 111 is in the first position, the third wall 1111 abuts against the second platen 112, and the fourth wall 1112 abuts against the third platen 113, wherein the third wall 1111 and the fourth wall 1112 are respectively perpendicular to the support surface 114, and the first plate 1222 can be a rectangular plate. The rectangular plate is easy to make and has high processing accuracy. The first plate 1222 is easy to separate and assemble from the second plate 12211 and the third plate 116, which helps to improve the quality of hot pressing.

[0045] like Figure 1 , Figure 4 as well as Figure 5As shown, when in use, in the initial state, when the first platen 111 is in the first position, the second platen 112 is in the fourth position, and the third platen 113 is in the sixth position, the upper wall surfaces of the first platen 111, the second platen 112, and the third platen 113 jointly limit the support surface 114, at which time the battery cell assembly can be placed on the support surface 114 and the battery cell assembly can be hot pressed. After the hot pressing of the battery cell assembly is completed, the first linkage part 121 drives the first platen 111 to move from the first position to the second position. The first platen 111 lifts the battery cell assembly from the support surface 114, so that the battery cell assembly can be removed conveniently and quickly. After removing the battery cell assembly, the first linkage part 121 drives the first platen 111 to return from the second position to the first position. The first platen 111 moves from the second position to the first position, and the first linkage part 121 drives the second linkage part 122 and the third linkage part 123. Among them, the pusher 1211 pushes the abutment member 1221 in the horizontal direction, and the second plate 12211 body can move from the fourth position to the third position. Similarly, the third linkage part 123 drives the third plate 116 body to move from the sixth position to the fifth position. The second plate 12211 body and the third plate 116 body both move away from the first plate 1222 body. The distance between the second plate 12211 body and the third plate 116 body increases, which effectively avoids the friction loss between the first plate 1222 body and the second plate 12211 body and the third plate 116 body. The first plate 1222 body moves to the first position, the second plate 12211 body is reset from the third position to the fourth position, and the third plate 116 body is reset from the fifth position to the sixth position, and the platform mechanism 100 returns to the initial state. The movable setting of the second plate 112 and the third plate 113 greatly reduces the wear between the plates of the platform mechanism 100, greatly reduces the gap between the plates, and greatly improves the hot pressing quality of the battery cell stack. It can be understood that when the first linkage part 121 drives the first platform 111 to move from the first position to the second position, the second linkage part 122 can drive the second plate 12211 to move between the fourth position and the third position, or keep the second plate 12211 still, and the third linkage part 123 can drive the third plate 116 to move between the sixth position and the fifth position, or keep the third plate 116 still, which will not be repeated here.

[0046] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0047] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or", "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0048] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A platform mechanism, characterized in that: include: A load-bearing platform, comprising a first platen, a second platen and a third platen, wherein the first platen is located between the second platen and the third platen in the transverse direction, the first platen has a first position located at the bottom and a second position located at the top, the second platen has a third position located laterally away from the third platen and a fourth position located laterally close to the third platen, and when the first platen is located at the first position and the second platen is located at the fourth position, the upper walls of the first platen, the second platen and the third platen together constitute a support surface for supporting a cell assembly; A linkage assembly, comprising a first linkage part and a second linkage part, wherein the first linkage part is connected to the first platform, and the second linkage part is connected to the second platform; When the first linkage part drives the first platform to switch between the first position and the second position, the first linkage part can drive the second linkage part so that the second platform can switch between the third position and the fourth position.

2. The platform mechanism according to claim 1, characterized in that: The first linkage part includes a pushing member, the second linkage part includes an abutment member, the supporting platform includes a first elastic member, the first elastic member is connected to the second platform, and the pushing member is configured to push the abutment member laterally when the first platform is switched from the second position to the first position, so as to switch the second platform to the third position; when the first platform is located at the first position, the pushing member is separated from the abutment member, and the first elastic member is configured to enable the second platform to switch from the third position to the fourth position.

3. The platform mechanism according to claim 2, characterized in that: The pushing member includes a first wall surface and a second wall surface, wherein the first wall surface is perpendicular to the supporting surface, the second wall surface is arranged to cross the first wall surface, and the second wall surface is connected to the first wall surface and extends toward the side of the first wall surface away from the abutting member.

4. The platform mechanism according to claim 2, characterized in that: The first linkage part further includes a sliding member and a driving member, the first platform is connected to the sliding member, and the driving member is used to drive the first platform to slide on the sliding member along a vertical direction.

5. The platform mechanism according to claim 2, characterized in that: The second linkage portion also includes a first plate, which limits a first groove. One end of the abutment member is connected to the second platform, and the other end is used to abut against the pushing member. When the second platform is located at the third position, the end of the abutment member facing away from the second platform can be inserted into the first groove.

6. The platform mechanism according to claim 5, characterized in that: The abutment member includes a second plate and a guide column, the second plate is connected to the second platform, the guide column is connected to one end of the second plate away from the second platform, and in the horizontal direction, one end of the guide column is used to abut against the pushing member, and the other end is used to abut against the wall of the first groove.

7. The platform mechanism according to claim 2, characterized in that: The supporting platform also includes a third plate, which is arranged on the side of the second plate away from the third plate. One end of the first elastic member is connected to the third plate and the other end is connected to the second plate. When the second plate is located in the third position, the first elastic member is compressed.

8. The platform mechanism according to claim 1, characterized in that: The third platen has a fifth position laterally away from the second platen and a sixth position laterally close to the second platen, and when the first platen is located at the first position and the third platen is located at the sixth position, the first platen, the second platen and the upper wall surface of the third platen together form a support surface for supporting the battery cell assembly; The linkage assembly further includes a third linkage portion, and the third linkage portion is connected to the third platform; When the first linkage part drives the first platform to switch between the first position and the second position, the first linkage part can drive the third linkage part to enable the third platform to switch between the fifth position and the sixth position.

9. The platform mechanism according to claim 8, characterized in that: The carrying platform includes a second elastic member, the second elastic member is connected to the third platform, and the second elastic member is configured to enable the second platform to switch from the fifth position to the sixth position.

10. The platform mechanism according to claim 1, characterized in that: The first platform includes a third wall and a fourth wall arranged opposite to each other. When the first platform is in the first position, the third wall abuts against the second platform, and the fourth wall abuts against the third platform, wherein the third wall and the fourth wall are respectively perpendicular to the supporting surface.

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