Battery cell hot-pressing mechanism and lamination stacking machine

Abstract

The utility model relates to the technical field of lithium battery manufacturing, and discloses a battery cell hot-pressing mechanism and a lamination machine. The battery cell hot-pressing mechanism comprises a battery cell conveyor which comprises a conveying piece and a conveying driving mechanism for driving the conveying piece to move, and the conveying piece is suitable for conveying a battery cell; the pre-pressing and preheating mechanism is arranged on the battery cell conveyor and is provided with a first passing channel for the conveying piece to drive the battery cells to convey, and the pre-pressing and preheating mechanism is suitable for pre-pressing and heating the battery cells on the conveying piece; and the hot-pressing mechanism is provided with a second passing channel for the conveying piece to drive the battery cell to convey, the pre-pressing and preheating mechanism and the hot-pressing mechanism are arranged in the conveying direction of the battery cell, and the hot-pressing mechanism is suitable for hot-pressing the battery cell on the conveying piece. The pre-pressing and preheating mechanism is arranged on the upstream of the hot-pressing mechanism, so that the battery cell can be heated in advance, the heating time of the hot-pressing mechanism on the battery cell is shortened, the hot-pressing efficiency is improved, the battery cell is conveyed through the battery cell conveyor, the time for feeding and discharging the battery cell and carrying the battery cell into the hot-pressing mechanism can be saved, and the hot-pressing time is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery manufacturing, in particular to a battery core hot pressing mechanism and a laminating machine. Background Art

[0002] At present, the battery cell of lithium-ion battery includes positive electrode sheet, negative electrode sheet and separator. There are generally two production processes for lithium-ion battery cells, one is winding process and the other is lamination process. The lamination process makes the positive and negative electrode sheets and separators stacked neatly layer by layer to form a battery cell. After the battery cell is stacked, it needs to be flat-extruded under specific temperature and pressure conditions to make the positive and negative electrode sheets and separators stick together to prevent the electrode sheets from spreading during transportation.

[0003] In the prior art, a cell hot pressing mechanism usually adopts a separate hot pressing chamber, and the cell is transported to the hot pressing chamber by a loading and unloading robot. The cell is hot pressed after being heated by the upper and lower pressing plates in the hot pressing chamber. This method usually transfers heat to the pole pieces and diaphragms on the upper and lower sides of the cell through the upper and lower pressing plates. The heating effect of the pole pieces and diaphragms near the middle is poor, resulting in a poor hot pressing effect. It usually takes a long time to achieve the ideal hot pressing effect, and the efficiency is poor. Utility Model Content

[0004] In view of this, the utility model provides a battery core hot pressing mechanism and a laminating machine to solve the problems of long hot pressing time and poor hot pressing effect of the battery core hot pressing mechanism in the prior art.

[0005] In the first aspect, the utility model provides a battery cell hot pressing mechanism, comprising: a battery cell conveyor, comprising a conveying member and a conveying drive mechanism for driving the conveying member to move, the conveying member is suitable for conveying battery cells; a pre-pressing and preheating mechanism, which is arranged on the battery cell conveyor and has a first travel channel for the conveying member to drive the battery cells to be conveyed, the pre-pressing and preheating mechanism is suitable for pre-pressing and heating the battery cells on the conveying member; a hot pressing mechanism, which has a second travel channel for the conveying member to drive the battery cells to be conveyed, the pre-pressing and preheating mechanism and the hot pressing mechanism are arranged along the conveying direction of the battery cells, and the hot pressing mechanism is suitable for hot pressing the battery cells on the conveying member.

[0006] Beneficial effects: By arranging a pre-pressing and preheating mechanism upstream of the hot pressing mechanism, the battery cells can be heated in advance, reducing the heating time of the hot pressing mechanism on the battery cells, improving the hot pressing efficiency, and conveying the battery cells by a battery cell conveyor can save the time for loading and unloading the battery cells and transporting them into the hot pressing mechanism, thus shortening the hot pressing time.

[0007] In an optional embodiment, the hot pressing mechanism includes: a support frame, suitable for being fixed on the surface to be fixed; a heating and insulation furnace, arranged on the support frame, the heating and insulation furnace includes an upper heating and insulation structure and a lower heating and insulation structure, and a second passage is formed between the upper heating and insulation structure and the lower heating and insulation structure; a hot pressing drive component, fixed on the support frame and connected to the upper heating and insulation structure, and the hot pressing drive component drives the upper heating and insulation structure to move up and down.

[0008] Beneficial effects: The heat pressing mechanism has a simple structure and is easy to implement.

[0009] In an optional embodiment, when the upper heating and heat-insulating structure moves up and down, the upper heating and heat-insulating structure and the lower heating and heat-insulating structure enclose a heating and heat-insulating cavity to prevent heat from being lost from both sides of the extension direction of the second travel channel.

[0010] Beneficial effect: During the up and down movement of the upper heating and heat-insulating structure, the heating and heat-insulating cavity preserves heat and prevents heat from being lost from both sides of the passage, thereby improving heating efficiency.

[0011] In an optional embodiment, a first side insulation board is provided on the side of one of the upper heating and insulation structure and the lower heating and insulation structure along the extension direction of the second passage, and the first side insulation board blocks both sides of the extension direction of the second passage.

[0012] Beneficial effect: When the upper heating and insulation structure moves up and down, the first side insulation board always blocks both sides of the second passage, thereby conserving heat and preventing heat from being lost from both sides of the extension direction of the second passage, thereby improving the heating effect.

[0013] In an optional embodiment, the length of the pre-pressing and preheating mechanism along the conveying direction is longer than the length of the hot pressing mechanism along the conveying direction, and the pre-pressing and preheating mechanism has a preheating and heat preservation cavity for accommodating a plurality of battery cells.

[0014] Beneficial effects: The pre-pressing and preheating mechanism can pre-press and preheat multiple cells at a time, and the pre-pressing and preheating efficiency is high.

[0015] In an optional implementation, the hot pressing pressure applied to the battery cell by the hot pressing mechanism is greater than the pre-pressing pressure applied to the battery cell by the pre-pressing and preheating mechanism.

[0016] Beneficial effect: The high hot pressing pressure of the hot pressing mechanism can effectively ensure that the positive and negative electrodes and the diaphragm are adhered together, preventing the electrodes from dispersing during transportation.

[0017] In an optional embodiment, the conveying member is a conveyor belt.

[0018] Beneficial effect: The setting of the conveyor belt makes it easier to pre-press and hot-press the battery cells.

[0019] In an optional embodiment, the battery cell hot pressing mechanism further includes a dust removal mechanism, which is disposed on the battery cell conveyor and is suitable for removing dust from the lower surface of the lower belt section of the conveyor belt.

[0020] Beneficial effect: The dust on the lower surface of the lower belt segment is blown off and collected by the dust removal mechanism, thereby preventing dust from entering the battery cell and causing a short circuit.

[0021] In an optional embodiment, the dust removal mechanism includes a dust hood, a fan and a dust collector. The dust hood covers a portion of the lower surface of the lower belt section. A blowing port is provided at the bottom of the dust hood, and the blowing port is connected to the fan. Dust suction ports are provided on two opposite sides of the dust hood, and the dust suction ports are connected to the vacuum cleaner.

[0022] Beneficial effects: The dust removal mechanism has a simple structure and is easy to implement.

[0023] In an optional embodiment, the pre-pressing and preheating mechanism includes: a fixed bracket, fixed on the battery cell conveyor; a preheating and insulation furnace, arranged in an installation space surrounded by the fixed bracket, the preheating and insulation furnace includes an upper preheating and insulation structure and a lower preheating and insulation structure, and a first travel channel is formed between the upper preheating and insulation structure and the lower preheating and insulation structure; a pre-pressing driving member, arranged on the fixed bracket and connected to the upper preheating and insulation structure, the pre-pressing driving member drives the upper preheating and insulation structure to move up and down; wherein, when the upper preheating and insulation structure moves up and down, the upper preheating and insulation structure and the lower preheating and insulation structure form a preheating and insulation cavity to prevent heat from being lost from both sides of the extension direction of the first travel channel.

[0024] Beneficial effect: During the up and down movement of the upper preheating and heat-insulating structure, the preheating and heat-insulating cavity preserves heat and prevents heat from being lost from both sides of the extension direction of the first travel channel, thereby improving the heating efficiency.

[0025] In a second aspect, the utility model further provides a laminating machine, comprising: the above-mentioned battery cell hot pressing mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A three-dimensional diagram of a battery core hot pressing mechanism according to an embodiment of the utility model;

[0028] Figure 2 for Figure 1 A three-dimensional diagram of the battery cell hot pressing mechanism from another perspective;

[0029] Figure 3 for Figure 2 A partial front view of the battery cell hot pressing mechanism shown;

[0030] Figure 4 for Figure 2 A side view of the battery cell hot pressing mechanism shown;

[0031] Figure 5 for Figure 2 A top view of the battery cell hot pressing mechanism shown;

[0032] Figure 6 for Figure 2 A three-dimensional diagram of the dust removal mechanism shown;

[0033] Figure 7 for Figure 1 A three-dimensional diagram of the pre-pressing and pre-heating mechanism of the battery cell hot pressing mechanism and the battery cell conveyor;

[0034] Figure 8 for Figure 7 The front view of the pre-pressing and pre-heating mechanism and the battery cell conveyor shown;

[0035] Fig. 9 for Figure 7 A side view of the pre-pressing and pre-heating mechanism and the cell conveyor is shown;

[0036] Fig.10 for Figure 7 A top view of the pre-pressing and pre-heating mechanism and the cell conveyor shown;

[0037] Fig.11 for Figure 7 A perspective view of the preheating and holding furnace and the support member shown;

[0038] Fig.12 for Fig.11 A front view of the preheating and holding furnace and the supporting member shown;

[0039] Fig.13 for Fig.12 The AA sectional view of the preheating and holding furnace and the supporting member is shown.

[0040] Description of reference numerals:

[0041] 1. Battery cell conveyor; 101. Conveyor belt; 102. Motor; 103. Frame;

[0042] 2. Pre-pressing and preheating mechanism; 201. Fixed bracket; 2011. Supporting member; 2012. Vertical pole; 2013. Supporting rod; 202. Pre-pressing driving member; 203. Upper pre-heating and heat-insulating structure; 2031. Upper outer cover; 2032. Upper heat-insulating member; 2033. Upper heating plate; 2034. Upper pressing plate; 2035. Upper outer plate; 2036. Lower inner plate; 2037. Upper end plate; 204. Lower pre-heating and heat-insulating structure; 2041. Lower outer cover; 2042. Lower heat-insulating member; 2043. Lower heating plate; 2044. Lower pressing plate; 2045. Lower outer plate; 2046. Upper inner plate; 2047. Lower end plate; 205. First side heat-insulating plate; 206. Second side heat-insulating plate; 207. Connecting member;

[0043] 3. Hot pressing mechanism; 301. Support frame; 3011. Support column; 3012. Support frame; 302. Hot pressing driving part; 303. Heating and holding furnace;

[0044] 4. Dust removal mechanism; 401. Dust removal cover; 4011. First side plate; 4012. Second side plate; 402. Dust suction pipe;

[0045] 5. Feeding conveyor;

[0046] 6. Unloading conveyor. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0048] Combine the following Figures 1 to 13 , describing an embodiment of the utility model.

[0049] According to an embodiment of the utility model, on the one hand, a battery cell hot pressing mechanism is provided, comprising: a battery cell conveyor 1, a pre-pressing and preheating mechanism 2 and a hot pressing mechanism 3, the battery cell conveyor 1 comprising a conveying member and a conveying drive mechanism for driving the conveying member to move, the conveying member being suitable for conveying battery cells; the pre-pressing and preheating mechanism 2 is arranged on the battery cell conveyor 1 and has a first passage for the conveying member to drive the battery cells to be conveyed, the pre-pressing and preheating mechanism 2 is suitable for pre-pressing and heating the battery cells on the conveying member; the hot pressing mechanism 3 has a second passage for the conveying member to drive the battery cells to be conveyed, the pre-pressing and preheating mechanism 2 and the hot pressing mechanism 3 are arranged along the conveying direction of the battery cells, and the hot pressing mechanism 3 is suitable for hot pressing the battery cells on the conveying member.

[0050] When the battery cell hot pressing mechanism of this embodiment is used to hot press the battery cell, when the battery cell is transferred to the conveying member of the battery cell conveyor 1, the battery cell moves with the conveying member to the pre-pressing and preheating mechanism 2, and the battery cell is pre-pressed and preheated by the pre-pressing and preheating mechanism 2. After pre-pressing and preheating, the battery cell continues to move with the conveying member to the hot pressing mechanism 3, and the battery cell is hot pressed by the hot pressing mechanism 3 to complete the hot pressing of the battery cell. By arranging the pre-pressing and preheating mechanism 2 upstream of the hot pressing mechanism 3, the battery cell can be heated in advance, the heating time of the hot pressing mechanism 3 on the battery cell can be reduced, and the hot pressing efficiency can be improved. In addition, by conveying the battery cell by the battery cell conveyor 1, the time for loading and unloading the battery cell and transporting it into the hot pressing mechanism 3 can be saved, and the hot pressing time can be shortened.

[0051] In one embodiment, Figures 1 to 4 As shown, the hot pressing mechanism 3 includes: a support frame 301, a heating and heat preservation furnace 303 and a hot pressing drive 302. The support frame 301 is suitable for being fixed on the surface to be fixed; the heating and heat preservation furnace 303 is arranged on the support frame 301, and the heating and heat preservation furnace 303 includes an upper heating and heat preservation structure and a lower heating and heat preservation structure, and a second passage is formed between the upper heating and heat preservation structure and the lower heating and heat preservation structure; the hot pressing drive 302 is fixed on the support frame 301 and connected to the upper heating and heat preservation structure, and the hot pressing drive 302 drives the upper heating and heat preservation structure to move up and down. When the battery cell is not transferred to the conveying member, the upper heating and heat preservation structure and the lower heating and heat preservation structure begin to heat. When the battery cell is transferred to the conveying member, the hot pressing drive 302 drives the upper heating and heat preservation structure to lift a certain distance, and the battery cell enters the heating and heat preservation furnace 303. The hot pressing drive 302 drives the upper heating and heat preservation structure to descend, and the battery cell on the conveying member is squeezed and heated. The structure of the hot pressing mechanism 3 is simple and easy to implement.

[0052] Furthermore, when the upper heating and heat-insulating structure moves up and down, the upper heating and heat-insulating structure and the lower heating and heat-insulating structure enclose a heating and heat-insulating cavity to prevent heat from being lost from both sides of the second passage. In the process of the upper heating and heat-insulating structure moving up and down, the heating and heat-insulating cavity preserves heat and prevents heat from being lost from both sides of the passage, thereby improving heating efficiency.

[0053] In another embodiment, the hot pressing mechanism may not be provided with a heating and heat preservation chamber, and the structure in the prior art may be adopted.

[0054] In one embodiment, a first side insulation board is provided on the side extending in the extension direction of the second passage of one of the upper heating and heat-insulating structure and the lower heating and heat-insulating structure, and the first side insulation board shields both sides of the extension direction of the second passage. When the upper heating and heat-insulating structure moves up and down, the first side insulation board shields both sides of the second passage, thereby conserving heat and preventing heat from being lost from both sides of the second passage, thereby improving the heating effect.

[0055] In one embodiment, the battery cell hot pressing and heat preservation mechanism further includes a second side heat preservation plate, which is arranged outside the first side heat preservation plate and staggered with the first side heat preservation plate. The first side heat preservation plate and the second side heat preservation plate are staggered, and during the up and down movement of the upper heating and heat preservation structure, the projections of the first side heat preservation plate and the second side heat preservation plate always partially overlap, which can further prevent heat loss and improve the heat preservation effect.

[0056] Specifically, the first side insulation board is arranged on the upper heating and insulation structure, and the second side insulation board is arranged on the support frame 301.

[0057] It can be understood that in another embodiment, the first side insulation board can also be arranged on the lower heating and insulation structure or the support frame 301, and the second side insulation board can be arranged on the upper heating and insulation structure.

[0058] In one embodiment, Figure 1 and Figure 2 As shown, the length of the pre-pressing and preheating mechanism 2 along the conveying direction is longer than the length of the hot pressing mechanism 3 along the conveying direction. The pre-pressing and preheating mechanism 2 has a preheating and heat preservation chamber for accommodating multiple battery cells. The pre-pressing and preheating mechanism 2 can pre-press and preheat multiple battery cells at a time, and the pre-pressing and preheating efficiency is high. Specifically, the hot pressing mechanism 3 hot presses one battery cell at a time to ensure the hot pressing effect.

[0059] In one embodiment, the hot pressing pressure applied by the hot pressing mechanism 3 to the battery cell is greater than the pre-pressing pressure applied by the pre-pressing and preheating mechanism 2 to the battery cell. The high hot pressing pressure of the hot pressing mechanism 3 can effectively ensure that the positive and negative electrodes and the diaphragm are adhered together, preventing the electrodes from dispersing during transportation.

[0060] In one embodiment, Figure 1 As shown, the conveying member is a conveyor belt 101. When the conveyor belt 101 carries the battery cells and moves to the pre-pressing and preheating mechanism 2, the conveyor belt 101 stops moving, and the pre-pressing and preheating mechanism 2 pre-presses and pre-heats the battery cells on the conveyor belt 101. After the pre-pressing and pre-heating are completed, the conveyor belt 101 continues to move with the battery cells. When the battery cells move to the hot pressing mechanism 3, the conveyor belt 101 stops moving, and the hot pressing mechanism 3 hot presses the battery cells. The pre-heating and pre-pressing process is added before hot pressing, which reduces the hot pressing time and improves the hot pressing efficiency. The battery cell conveyor 1 transports the battery cells, and the structure is simpler, and there is no need for a complex battery cell loading and unloading mechanism, which reduces the number of battery cell handling times and has a higher hot pressing efficiency. The setting of the conveyor belt makes it easier to pre-press and hot press the battery cells.

[0061] Furthermore, the lower heating and heat-insulating structure is sleeved in the conveyor belt 101, and the lower heating and heat-insulating structure is suitable for supporting the conveyor belt 101 and the battery cells it conveys, and the conveyor belt 101 is suitable for conveying the battery cells on the lower heating and heat-insulating structure. Specifically, the lower pressure plate of the lower heating and heat-insulating structure can support the conveyed battery cells, and the conveyor belt 101 can convey the battery cells on the lower pressure plate.

[0062] Specifically, the preheating and heat preservation chamber can accommodate multiple battery cells, so that the pre-pressing and preheating mechanism can pre-press and heat multiple battery cells at a time, thereby improving the pre-pressing efficiency. The pre-pressing and preheating mechanism 2 can accommodate multiple battery cells to reduce the time of formal hot pressing and improve the hot pressing efficiency.

[0063] Preferably, the preheating and heat preservation chamber is provided with multiple pre-pressing and pre-heating stations, that is, the battery cell is pre-pressed for multiple times before the formal hot pressing of the battery cell, so as to reduce the formal hot pressing time and improve the hot pressing effect. For example, if the formal hot pressing time of the battery cell is 10s, the battery cell is heated and pre-pressed for at least 30s in the preheating and heat preservation chamber before the formal hot pressing, and the battery cell has reached a certain temperature and compactness.

[0064] In one embodiment, Figure 2 and Figure 3 As shown, the support frame 301 includes four support columns 3011 and a support frame 3012, the support frame 3012 is fixed on the four support columns 3011, the support frame 3012 includes a bottom plate, a top plate and two side plates connecting the bottom plate and the top plate, the lower heating and heat preservation structure is fixed on the bottom plate, and the hot pressing drive member 302 is fixed on the top plate. The heating and heat preservation furnace 303 is supported by the four support columns 3011 and the support frame 3012 to keep the force stable during hot pressing. The surface to be fixed is the ground, etc.

[0065] In one embodiment, the hot pressing drive member 302 is preferably a booster cylinder, and the hot pressing drive member 302 may also be a linear motor, etc. The booster cylinder is used to pressurize to reach the maximum hot pressing pressure, for example, the maximum hot pressing pressure is 10 tons.

[0066] In one embodiment, the battery cell hot pressing mechanism further includes a dust removal mechanism 4, which is disposed on the battery cell conveyor 1 and is suitable for removing dust from the lower surface of the lower belt section of the conveyor belt 101. The dust removal mechanism 4 blows off the dust on the lower surface of the lower belt section and collects the dust to prevent dust from entering the battery cell and causing a short circuit.

[0067] In one embodiment, Figure 3 and Figure 6As shown, the dust removal mechanism 4 includes a dust removal cover 401, a fan and a dust collector. The dust removal cover 401 covers a portion of the lower surface of the lower belt segment. The bottom of the dust removal cover 401 is provided with a blowing port, which is connected to the fan. Dust suction ports are provided on two opposite sides of the dust removal cover 401, which are connected to the dust collector. The fan blows air to the lower surface of the lower belt segment to blow off the dust on the lower surface of the lower belt segment. The dust is sucked out of the dust removal cover 401 by the dust collector. The dust removal mechanism 4 has a simple structure and is easy to implement.

[0068] Specifically, the dust suction port is connected to a dust suction pipe 402, and the dust suction pipe 402 is connected to the dust collector. The dust removal cover 401 includes a first side plate 4011 and a second side plate 4012 that are arranged opposite to each other, the height of the first side plate 4011 is less than the height of the second side plate 4012, the first side plate 4011 and the second side plate 4012 are arranged along the conveying direction of the conveying member, the height of the second side plate 4012 is higher than the height of the first side plate 4011, and the second side plate 4012 blocks dust to prevent dust from flowing along the conveying direction.

[0069] It should be noted that the fan and the vacuum cleaner can adopt the structures in the prior art, which will not be described in detail here.

[0070] In one embodiment, Figures 7 to 13 As shown, the pre-pressing and preheating mechanism 2 includes: a fixed bracket 201, a pre-heating and heat preservation furnace and a pre-pressing driving member 202. The fixed bracket 201 is fixed on the battery cell conveyor 1; the pre-heating and heat preservation furnace is arranged in the installation space surrounded by the fixed bracket 201, and the pre-heating and heat preservation furnace includes an upper pre-heating and heat preservation structure 203 and a lower pre-heating and heat preservation structure 204, and a first travel channel is formed between the upper pre-heating and heat preservation structure 203 and the lower pre-heating and heat preservation structure 204; the pre-pressing driving member 202 is arranged on the fixed bracket 201 and connected to the upper pre-heating and heat preservation structure 203, and the pre-pressing driving member 202 drives the upper pre-heating and heat preservation structure 203 to move up and down; wherein, when the upper pre-heating and heat preservation structure 203 moves up and down, the upper pre-heating and heat preservation structure 203 and the lower pre-heating and heat preservation structure 204 surround a pre-heating and heat preservation cavity to prevent heat from being lost from both sides of the first travel channel. When the battery cell is not transferred to the conveyor, the upper preheating and heat preservation structure 203 and the lower preheating and heat preservation structure 204 start to heat. When the battery cell is transferred to the conveyor, the pre-pressing driving member 202 drives the upper preheating and heat preservation structure 203 to rise a certain distance, and the battery cell enters the preheating and heat preservation furnace. The pre-pressing driving member 202 drives the upper preheating and heat preservation structure 203 to descend, squeeze and heat the battery cell on the conveyor, and play a shaping effect on the pole piece in the battery cell. In the process of the upper preheating and heat preservation structure 203 moving up and down, the preheating and heat preservation cavity retains heat and prevents heat from being lost from both sides of the first travel channel, thereby improving the heating efficiency.

[0071] In one embodiment, Figure 8 and Fig.13As shown, a first side heat insulation board 205 is provided on the side extending in the extension direction of the first passage of one of the upper preheating and heat insulation structure 203 and the lower preheating and heat insulation structure 204, and the first side heat insulation board 205 shields both sides of the extension direction of the first passage. When the upper preheating and heat insulation structure 203 moves up and down, the first side heat insulation board 205 always shields both sides of the first passage, preserves heat, prevents heat from being lost from both sides of the first passage, and improves the heating effect.

[0072] In one embodiment, the cell pre-pressing and pre-heating mechanism further includes a second side heat insulation board 206, which is arranged outside the first side heat insulation board 205 and staggered with the first side heat insulation board 205. The first side heat insulation board 205 and the second side heat insulation board 206 are staggered, and during the up and down movement of the upper preheating and heat preservation structure 203, the projections of the first side heat insulation board 205 and the second side heat insulation board 206 always partially overlap, which can further prevent heat loss and ensure the heat preservation effect.

[0073] Specifically, the first side heat insulation board 205 is arranged on the upper preheating and heat preservation structure 203 , and the second side heat insulation board 206 is arranged on the fixing bracket 201 .

[0074] It can be understood that in another embodiment, the first side heat insulation board 205 can also be arranged on the lower preheating and heat preservation structure 204 or the fixed bracket 201, and the second side heat insulation board 206 is arranged on the upper preheating and heat preservation structure 203.

[0075] In one embodiment, Fig.12 and Fig.13 As shown, the upper preheating and heat preservation structure 203 includes an upper outer cover 2031, an upper heat preservation member 2032, an upper heating plate 2033 and an upper pressing plate 2034. The upper heat preservation member 2032 is arranged in the inner cavity of the upper outer cover 2031, the upper heating plate 2033 is fixed on the outer bottom wall of the upper outer cover 2031, the upper pressing plate 2034 is fixed on the outer bottom wall of the upper outer cover 2031, and the upper heating plate 2033 is arranged between the upper pressing plate 2034 and the upper outer cover 2031. The upper heat is insulated by the upper heat preservation member 2032 to prevent the heat from being lost through the upper outer cover 2031. The heat generated by the upper heating plate 2033 after heating is transferred downward through the upper pressing plate 2034, and then transferred to the preheating and heat preservation cavity. When the battery cell is located in the preheating and heat preservation cavity, the battery cell can be heated and squeezed by the upper pressing plate 2034. An upper insulation member 2032 is provided in the upper preheating and heat-insulating structure 203, and a first side heat-insulating plate 205 and a second side heat-insulating plate 206 are provided on both sides of the first passage to concentrate heat and prevent it from being lost.

[0076] Specifically, the upper pressure plate 2034 is provided with a first side insulation plate 205 on both sides along the extension direction of the passage. The upper outer cover 2031 is a sheet metal part, which has the advantages of light weight, corrosion resistance, and easy processing. It can also provide a fixing basis for the upper insulation part 2032, the upper heating plate 2033 and the upper pressure plate 2034.

[0077] It should be noted that the upper pressing plate 2034 has two long sides along the extending direction of the passage and a short side perpendicular to the extending direction of the passage. The first side heat insulation plate 205 is arranged at the long side and extends downward.

[0078] In one embodiment, Fig.11 and Fig.13 As shown, the upper outer cover 2031 includes an upper outer plate 2035, a lower inner plate 2036 and two upper end plates 2037. The lower inner plate 2036 is arranged inside the upper outer plate 2035, and the two upper end plates 2037 are arranged at both ends of the upper outer plate 2035 and the lower inner plate 2036. The upper outer plate 2035, the lower inner plate 2036 and the two upper end plates 2037 form an upper installation cavity, and the upper heat-insulating member 2032 is arranged in the upper installation cavity, so as to facilitate the installation of the upper heat-insulating member 2032.

[0079] Specifically, the two upper end plates 2037 extend to both ends of the upper pressing plate 2034 and form a first end heat insulation plate. The first end heat insulation plate and the first side heat insulation plate 205 are arranged around the upper pressing plate 2034 to concentrate heat and prevent heat loss.

[0080] Furthermore, the upper outer panel 2035 and the lower inner panel 2036 are both U-shaped panels, and the upper insulation component 2032 is made of insulation cotton or the like.

[0081] In one embodiment, Figure 8 and Fig.13 As shown, the lower preheating and heat preservation structure 204 includes a lower outer cover 2041, a lower heat preservation member 2042, a lower heating plate 2043 and a lower pressing plate 2044. The lower heat preservation member 2042 is arranged in the inner cavity of the lower outer cover 2041, the lower heating plate 2043 is fixed on the outer top wall of the lower outer cover 2041, the lower pressing plate 2044 is fixed on the outer top wall of the lower outer cover 2041, and the lower heating plate 2043 is arranged between the lower pressing plate 2044 and the lower outer cover 2041. The lower heat is insulated by the lower heat preservation member 2042 to prevent the heat from being lost through the lower outer cover 2041. The heat generated by the lower heating plate 2043 after heating is transferred upward through the lower pressing plate 2044, and then transferred to the preheating and heat preservation cavity. When the battery cell is located in the preheating and heat preservation cavity, the battery cell can be heated.

[0082] Specifically, the second side insulation plate 206 is arranged on both sides of the lower outer cover 2041 and the lower pressure plate 2044, and the lower side of the first side insulation plate 205 extends downward to between the lower pressure plate 2044 and the second side insulation plate 206. When the upper preheating and heat preservation structure 203 moves up and down, the lower side of the first side insulation plate 205 is always located between the lower pressure plate 2044 and the second side insulation plate 206, which effectively prevents heat from being lost from both sides of the extension direction of the first passage when the upper preheating and heat preservation structure 203 is lifted.

[0083] Furthermore, the lower outer cover 2041 is a sheet metal part, which has the advantages of being lightweight, corrosion-resistant, and easy to process, and also provides a fixing basis for fixing the lower insulation part 2042, the lower heating plate 2043, and the lower pressure plate 2044.

[0084] In one embodiment, Fig.12 and Fig.13 As shown, the lower outer cover 2041 includes a lower outer plate 2045, an upper inner plate 2046 and two lower end plates 2047. The upper inner plate 2046 is arranged in the lower outer plate 2045, and the two lower end plates 2047 are arranged at both ends of the lower outer plate 2045 and the upper inner plate 2046. The lower outer plate 2045, the upper inner plate 2046 and the two lower end plates 2047 form a lower installation cavity, and the lower heat preservation member 2042 is arranged in the lower installation cavity, so as to facilitate the installation of the lower heat preservation member 2042.

[0085] Specifically, the two lower end plates 2047 extend to both ends of the lower pressure plate 2044 and form a second end insulation plate. The second end insulation plate and the first side insulation plate 205 are arranged around the lower pressure plate 2044 to concentrate heat and prevent heat loss.

[0086] Furthermore, the lower outer panel 2045 and the upper inner panel 2046 are both U-shaped panels, and the lower insulation component 2042 is made of insulation cotton or the like.

[0087] In one embodiment, Figures 7 to 9 As shown, the fixed bracket 201 includes a plurality of supporting members 2011, a plurality of vertical poles 2012 and two supporting poles 2013. The plurality of supporting members 2011 support the lower preheating and heat-insulating structure 204. The two ends of the supporting members 2011 are connected to the two vertical poles 2012 in a one-to-one correspondence. The plurality of vertical poles 2012 are arranged on both sides of the upper preheating and heat-insulating structure 203. The two supporting poles 2013 are arranged on both sides of the upper preheating and heat-insulating structure 203. Each supporting pole 2013 is connected to a plurality of vertical poles 2012 on the same side. The lower preheating and heat-insulating structure 204 is supported by the supporting members 2011, and the preload drive member 202, the lower preheating and heat-insulating structure 204 and the plurality of supporting members 2011 are supported by the vertical poles 2012 and the two supporting poles 2013. The fixed bracket 201 has a simple structure and is easy to implement.

[0088] Specifically, the vertical rods 2012 are fixed on the frame 103 of the battery cell conveyor 1, and the fixing is simple. The vertical rods 2012 and the two support rods 2013 are all square tubes, and the vertical rods 2012 and the two support rods 2013 form a square bracket.

[0089] Furthermore, the battery cell conveyor 1 also includes a frame 103, etc., and the transmission member is a conveyor belt 101, etc. The conveyor belt 101 is preferably a conveyor belt. The transmission drive mechanism includes a motor, a driving wheel, a driven wheel, etc. The motor drives the driving wheel to rotate, thereby driving the conveyor belt and the driven wheel to move, thereby conveying the battery cell. The conveyor belt 101 is annular, and the lower heating and heat preservation structure, the lower preheating and heat preservation structure 204, the bottom plate and the supporting member 2011 are all in the annular space of the conveyor belt 101.

[0090] Specifically, the lower preheating and heat preservation structure 204 is sleeved in the conveyor belt 101, and the lower preheating and heat preservation structure 204 is suitable for supporting the conveyor belt 101 and the battery cells it conveys, and the conveyor belt 101 is suitable for conveying the battery cells on the lower preheating and heat preservation structure 204. Specifically, the lower pressure plate 2044 can support the conveyed battery cells, and the conveyor belt 101 can convey the battery cells on the lower pressure plate 2044.

[0091] Specifically, a guide mechanism is provided between the upper preheating and heat-insulating structure 203 and the fixed bracket 201, and the guide mechanism guides the upper preheating and heat-insulating structure 203 to move up and down, so that the upper preheating and heat-insulating structure 203 moves smoothly and stably. The guide mechanism includes a guide shaft and a linear bearing, the guide shaft is fixed on the top of the upper preheating and heat-insulating structure 203, and the linear bearing is arranged on the fixed bracket 201.

[0092] Furthermore, the fixed bracket 201 also includes several mounting plates spanning the two support rods 2013 brackets, one mounting plate is used to install the pre-pressing driver 202, and the remaining mounting plates are used to install the linear bearings of the guide mechanism. The battery cell pre-pressing and preheating mechanism also includes a buffer and a lifting plate, the lifting plate is connected to the upper end of the guide shaft, the buffer is installed on the lifting plate and cooperates with the mounting plate, and the buffer can buffer the upper preheating and heat preservation structure 203 when pressing the battery cell downward. The buffer is preferably an oil pressure buffer or the like.

[0093] In one embodiment, Figure 8 As shown, a connector 207 is provided on the top surface of the upper preheating and heat-insulating structure 203, and the connector 207 is connected to the driving end of the pre-pressing driving member 202. The arrangement of the connector 207 facilitates the connection between the upper preheating and heat-insulating structure 203 and the driving end. Further, the connector 207 is triangular, etc.

[0094] In one embodiment, the pre-pressure driving member 202 is preferably a cylinder. The pre-pressure driving member 202 may also be an oil cylinder or a linear motor.

[0095] It should be noted that the specific structures of the upper heating and heat-insulating structure and the lower heating and heat-insulating structure are similar to the upper preheating and heat-insulating structure 203 and the lower preheating and heat-insulating structure 204, and will not be described in detail here.

[0096] According to an embodiment of the present utility model, on the other hand, a stacking machine is provided, comprising: the above-mentioned battery cell hot pressing mechanism.

[0097] In this embodiment, the stacking machine further includes a loading conveyor 5 and a unloading conveyor 6. The loading conveyor 5 is arranged at the first end of the cell conveyor, and the unloading conveyor 6 is arranged at the second end of the cell conveyor. The cells are loaded through the loading conveyor 5, and the cells after hot pressing are unloaded through the unloading conveyor 6. Both the loading conveyor 5 and the unloading conveyor 6 are belt conveyors. The dust removal mechanism 4 is arranged at the lower side of the cell conveyor 1 near the end of the loading conveyor 5.

[0098] The working process of the battery cell hot pressing mechanism is described below:

[0099] The battery cells are loaded from the loading conveyor 5 and start to move forward. They are heated at high temperature in the preheating and insulation furnace, and the upper pressure plate is driven by the pre-pressing cylinder to pre-press the battery cells in advance. The preheating and insulation furnace can pre-press and heat multiple battery cells at a time. After pre-pressing and preheating, the battery cells are conveyed forward to the heating and insulation furnace, and pressurized by the booster cylinder to reach the maximum hot pressing pressure. The support column supports the heating and insulation furnace to keep the force stable. After hot pressing, the battery cells move forward through the unloading conveyor 6 to enter the next process. The motor 102 of the battery cell conveyor 1 drives the conveyor belt to rotate stably, and the dust is sucked out by the dust removal mechanism 4 to prevent dust from entering the battery cells and causing short circuits.

[0100] It should be noted that in order to ensure the hot pressing effect of the battery cell, the hot pressing time of the battery cell at the hot pressing mechanism is greater than the time of one station of the pre-pressing and preheating mechanism 2, so multiple pre-pressing and preheating stations can be set at the pre-pressing and preheating mechanism, and the battery cell can be preheated and kept warm by multiple hot pressings with insulation, which can not only heat and pre-press the battery cell in advance, but also reduce the time of subsequent hot pressing and improve the hot pressing effect. Moreover, the battery cell is always transported on the conveyor belt, and there is no need for a manipulator to transfer it, so the hot pressing effect is good and the hot pressing efficiency is high.

[0101] In the related art, when the battery cell is placed in or taken out, space needs to be reserved between the upper and lower heaters for the robot to operate. The distance between the upper and lower pressure plates 2044 is large, and the heat loss is fast, resulting in a long heating time and low heating efficiency. The pole piece near the middle of the battery cell usually cannot be effectively heated to the ideal temperature.

[0102] In the present embodiment, a preheating station is added before the hot pressing station, and the battery cells can be heated in advance by a preheating and holding furnace, thereby effectively heating the battery cells, reducing the subsequent hot pressing time, improving the hot pressing efficiency, and improving the shaping effect after hot pressing; the pre-pressing and preheating mechanism of the hot pressing mechanism is arranged on the battery cell conveyor 1, which can save the time for loading and unloading the battery cells and transporting them into the pressure chamber, increase the hot pressing efficiency, and transport the battery cells by the battery cell conveyor 1, which has a simpler structure and does not require a complicated battery cell loading and unloading mechanism, reduces the number of battery cell transports, and has a higher hot pressing efficiency; dust is removed by the dust removal mechanism 4 to prevent dust from entering the battery cells and causing battery cell short circuits; the battery cell hot pressing mechanism has a simple structure, high efficiency, and low cost.

[0103] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A battery core hot pressing mechanism, characterized in that: include: A battery cell conveyor (1) comprises a conveying member and a conveying drive mechanism for driving the conveying member to move, wherein the conveying member is suitable for conveying battery cells; A pre-pressing and pre-heating mechanism (2) is arranged on the battery cell conveyor (1) and has a first passage for the conveying member to drive the battery cells to be conveyed, and the pre-pressing and pre-heating mechanism (2) is suitable for pre-pressing and heating the battery cells on the conveying member; The hot pressing mechanism (3) has a second passage for the conveying member to drive the battery cell to be conveyed. The pre-pressing and preheating mechanism (2) and the hot pressing mechanism (3) are arranged along the conveying direction of the battery cell. The hot pressing mechanism (3) is suitable for hot pressing the battery cell on the conveying member.

2. The battery core hot pressing mechanism according to claim 1, characterized in that: The hot pressing mechanism (3) comprises: A support frame (301) adapted to be fixed on a surface to be fixed; A heating and heat preservation furnace (303) is arranged on the support frame (301), the heating and heat preservation furnace (303) comprises an upper heating and heat preservation structure and a lower heating and heat preservation structure, and the second passage is formed between the upper heating and heat preservation structure and the lower heating and heat preservation structure; A heat-pressing driving component (302) is fixed on the support frame (301) and connected to the upper heating and heat-insulating structure, and the heat-pressing driving component (302) drives the upper heating and heat-insulating structure to move up and down.

3. The battery core hot pressing mechanism according to claim 2, characterized in that: When the upper heating and heat-insulating structure moves up and down, the upper heating and heat-insulating structure and the lower heating and heat-insulating structure enclose a heating and heat-insulating cavity to prevent heat from being lost from both sides of the extension direction of the second traveling channel.

4. The battery core hot pressing mechanism according to claim 3, characterized in that: A first side insulation board is provided on the side of one of the upper heating and heat-insulating structure and the lower heating and heat-insulating structure extending along the extension direction of the second passage, and the first side insulation board shields both sides of the second passage.

5. The battery core hot pressing mechanism according to any one of claims 1 to 4, characterized in that: The length of the pre-pressing and pre-heating mechanism (2) along the conveying direction is longer than the length of the hot pressing mechanism (3) along the conveying direction, and the pre-pressing and pre-heating mechanism (2) has a pre-heating and heat preservation cavity for accommodating a plurality of battery cells.

6. The battery core hot pressing mechanism according to any one of claims 1 to 4, characterized in that: The hot pressing pressure applied to the battery cell by the hot pressing mechanism (3) is greater than the pre-pressing pressure applied to the battery cell by the pre-pressing and preheating mechanism (2).

7. The battery core hot pressing mechanism according to any one of claims 1 to 4, characterized in that: The conveying member is a conveyor belt (101).

8. The battery core hot pressing mechanism according to claim 7, characterized in that: The battery cell hot pressing mechanism further comprises a dust removal mechanism (4), which is arranged on the battery cell conveyor (1) and is suitable for removing dust from the lower surface of the lower belt section of the conveyor belt (101).

9. The battery core hot pressing mechanism according to claim 8, characterized in that: The dust removal mechanism (4) comprises a dust removal hood (401), a fan and a dust collector. The dust removal hood (401) covers a portion of the lower surface of the lower belt section. The bottom of the dust removal hood (401) is provided with an air blowing port, and the air blowing port is connected to the fan. Dust suction ports are provided on two opposite sides of the dust removal hood (401), and the dust suction ports are connected to the dust collector.

10. The battery core hot pressing mechanism according to any one of claims 1 to 4, characterized in that: The pre-pressing and pre-heating mechanism (2) comprises: A fixed bracket (201) fixed on the battery cell conveyor (1); A preheating and heat preservation furnace is arranged in the installation space surrounded by the fixed bracket (201), the preheating and heat preservation furnace comprises an upper preheating and heat preservation structure (203) and a lower preheating and heat preservation structure (204), and the first passage is formed between the upper preheating and heat preservation structure (203) and the lower preheating and heat preservation structure (204); A pre-pressing driving member (202) is arranged on the fixed support (201) and connected to the upper pre-heating and heat-insulating structure (203), and the pre-pressing driving member (202) drives the upper pre-heating and heat-insulating structure (203) to move up and down; When the upper preheating and heat-insulating structure (203) moves up and down, the upper preheating and heat-insulating structure (203) and the lower preheating and heat-insulating structure (204) enclose a preheating and heat-insulating cavity to prevent heat from being lost from both sides of the extension direction of the first passage.

11. A laminating machine, characterized in that: include: The battery cell hot pressing mechanism according to any one of claims 1 to 10.

Images