CN218769691U

CN218769691U - Hot press unit and lamination electricity core

Info

Publication number: CN218769691U
Application number: CN202223359720.6U
Authority: CN
Inventors: 尹旭
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-03-28
Anticipated expiration: 2032-12-09

Abstract

The utility model provides a hot press unit and lamination electricity core, hot press unit are used for hot pressing lamination electricity core, and lamination electricity core package is including piling up the multilayer electricity core that sets up, and utmost point ear connects in the multilayer the side of piling up of electricity core, hot press unit including the heating element who is used for heating utmost point ear, be used for the compressing tightly subassembly of hot-pressing electricity core package, heating element is through heating utmost point ear in order to wrap heat transfer to electricity core to improve the homogeneity that heats electricity core package, near and improve follow-up reliability of carrying out the plastic to electricity core package.

Description

Hot press unit and lamination electricity core

Technical Field

The utility model relates to a battery manufacturing technical field especially relates to a hot press unit and lamination electricity core.

Background

Due to its high energy density and good size control capability, the lithium ion laminated battery has been widely used in smart phones, energy storage, electric vehicles, and other aspects.

Compared with a winding process, the lithium ion laminated battery formed by adopting the lamination process has the advantages that the structure of the battery cell after lamination is loose, and the battery cell is generally heated and shaped through the upper hot pressing plate and the lower hot pressing plate. However, the above hot pressing manner may cause heat to concentrate on a plurality of battery cells close to the upper hot pressing plate and the lower hot pressing plate, and the heat is not easily transmitted to the battery cells close to the central position, so that the battery cell structure after lamination is heated unevenly from outside to inside, which is not beneficial to shaping the battery cell structure after lamination.

Therefore, the existing hot-pressing method of the lithium ion laminated battery has the problems, and the improvement is urgently needed.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a hot press unit and lamination electricity core can improve the uneven technical problem of being heated by outer to interior electric core structure that exists in the hot pressing mode of lithium ion lamination battery.

In a first aspect, an embodiment of the utility model provides a hot press unit for hot pressing lamination electricity core, lamination electricity core package electricity core and utmost point ear, electricity core package is including piling up the multilayer electricity core of setting, utmost point ear is connected in the multilayer the side of piling up of electricity core, hot press unit includes:

the heating assembly is used for heating the lug so as to transfer heat to the electric core package through the lug;

and the compressing assembly is used for hot-pressing the electric core package.

In one embodiment, the heating assembly comprises:

a first heating plate;

the second hot plate, with first hot plate sets up relatively, first hot plate with the second hot plate is used for the centre gripping and heats utmost point ear.

In one embodiment, the laminated cell includes two tabs disposed in an insulating manner, and the hot-pressing apparatus includes:

and the two heating components are used for respectively heating the two tabs so as to respectively transfer heat to the electric core package through the two tabs.

In one embodiment, the two tabs are respectively connected to different sides of the electric core package;

the two heating assemblies are respectively arranged on two sides of the electric core package, which are connected with the two tabs, so as to be respectively arranged corresponding to the two tabs.

In one embodiment, the compression assembly and the tabs are located on different sides of the electrical core package.

In one embodiment, the heating assembly is movably coupled to the compacting assembly.

In one embodiment, the hot press apparatus further comprises:

the telescopic rod is connected between the pressing assembly and the heating assembly and used for controlling the heating assembly to move towards the direction close to or far away from the pole lug.

In an embodiment, the tab, the heating assembly, the battery cell, and the compressing assembly are disposed in parallel, and the compressing assembly is disposed near the battery cell at the end of the battery cell pack.

In one embodiment, the thickness of the compression assembly is greater than the thickness of the heating assembly.

In a second aspect, the embodiment of the present invention further provides a laminated battery cell, which is manufactured by the hot press device as described above, wherein the battery capacity retention rate of the laminated battery cell after 500 times of charging and discharging is greater than or equal to 95%.

The utility model discloses a beneficial effect of embodiment:

the utility model discloses an in the embodiment, set up to including the compressing tightly subassembly that is used for hot-pressing electric core package through with hot press unit, still include the heating element that carries out the heating to the utmost point ear in the lamination electricity core, make the heat direct action that heating element produced utmost point ear, further through the side of piling up of multilayer electricity core, utmost point ear can transmit the heat to multilayer electricity core, thereby improved the uneven technical problem of electric core structure heating that exists in the hot pressing mode of current lithium ion lamination battery, in order to improve the homogeneity that heats to electric core package, near and improve follow-up reliability of carrying out the plastic to electric core package.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained without inventive efforts.

Fig. 1 is a scene schematic diagram of the hot press device and the lamination cell used in cooperation according to an embodiment of the present invention.

Fig. 2 is an explosion diagram of a laminated cell according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of a curve of battery capacity retention rate-charge and discharge times of the laminated battery cell and the laminated battery cell in the prior art, provided by an embodiment of the present invention.

Fig. 4 is a flowchart of a hot pressing method according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention. Furthermore, it should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation, not limitation.

In the present application, unless stated to the contrary, use of directional terms such as "top" and "low" generally refer to the relative top and bottom of the device in actual use or operation, and specifically to the orientation of the drawing figures. The terms "first", "second", etc. in the present invention are used to distinguish different objects, not to describe a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

An embodiment of the utility model provides a hot press unit for hot pressing lamination electricity core, hot press unit include but not limited to following embodiment and the combination between the following embodiment.

In an embodiment, as shown in fig. 1, the laminated battery cell 10 includes a battery core package 101 and a tab 102, where the battery core package 101 includes a plurality of battery cells 1011 arranged in a stacked manner, and the tab 102 is connected to a stacked side of the plurality of battery cells 1011; the hot press apparatus 20 includes: a heating assembly 201 for heating the tab 102 to transfer heat to the electrical core package 101 through the tab 102. The battery core 1011 may be a laminated structure, and the sizes of the multilayer battery cores 1011 may be the same so as to ensure that partial parameters of the multilayer battery cores 1011 are close to each other, which is also convenient for stacking the multilayer battery cores 1011.

As can be seen from the above discussion and fig. 1, the stacking direction of the multilayer battery cells 1011 is the arrangement direction of the multilayer battery cells 1011, the number of the stacking sides of the multilayer battery cells 1011 may be related to the specific shape of the battery cells 1011, for example, the multilayer battery cells 1011 are stacked in the vertical direction, then all the side portions parallel to the vertical direction in the formed battery cell package 101 may be understood as the stacking sides, further, the projection shape of the battery cells 1011 in the vertical direction is an n-polygon, then the stacking sides are n, n is a positive integer greater than or equal to 3, and for example, the edge of the projection of the battery cells 1011 in the vertical direction includes a curve, then the corresponding stacking sides may also form a curved surface.

It can be understood that utmost point ear 102 is connected in the side of piling up of multilayer electricity core 1011, and not be located the side of the place of top layer electricity core 1011 or bottom layer electricity core 1011, can improve the reliability that utmost point ear 102 and multilayer electricity core 1011 all contact, on this basis, be equipped with heating element 201 of heating utmost point ear 102 in this embodiment, the heat that heating element 201 produced directly acts on utmost point ear 102 promptly, and further, through the side of piling up of multilayer electricity core 1011, utmost point ear 102 can transmit the heat to multilayer electricity core 1011, in order to improve the homogeneity that heats electricity core package 101, and near and improve the follow-up reliability of carrying out the plastic to electricity core package 101.

In one embodiment, as shown in fig. 1, the heating assembly 201 comprises: a first heated plate 2011; second hot plate 2012, with first hot plate 2011 sets up relatively, first hot plate 2011 with second hot plate 2012 is used for the centre gripping and heats utmost point ear 102. It can be understood that the tab 102 is connected to the stacking side of the multilayer battery core 1011, where the shape of the tab 102 is not limited, in this embodiment, the heating assembly 201 is configured to include a first heating plate 2011 and a second heating plate 2012 which are used for clamping and heating the tab 102 and are oppositely disposed, two opposite sides of the tab 102 can be fixed, and heating is performed from the two sides, so that the reliability of heating the tab 102 is improved

In an embodiment, as shown in fig. 1 and fig. 2, the laminated cell 10 includes two tabs 102 disposed in an insulating manner; the hot press apparatus 20 includes: the two heating assemblies 201 are configured to heat the two tabs 102, respectively, so as to transfer heat to the electrical core package 101 through the two tabs 102, respectively. Specifically, as shown in fig. 1 and fig. 2, the laminated battery cell 10 may further include a plurality of separators 103, two adjacent battery cells 1011 have opposite polarities, a separator 103 is disposed between two adjacent battery cells 1011 to insulate the two, the battery cells 1011 include a battery cell carrier 1012 and a coating 1013 on at least one side of the battery cell carrier 1012, and the coating 1013 may include lithium ions. Further, one side of each of the battery cells 1011, which is close to the stacking side of the plurality of battery cells 1011, is connected with a sub-tab 1021, the polarity of each sub-tab 1021 is the same as that of the corresponding battery cell 1011, and further, each sub-tab 1021 may be integrally formed with a battery cell carrier 1012 of the corresponding battery cell 1011, and the battery cell carrier 1012 may be made of a metal foil.

Wherein, for a positive polarity sub-tab 1021, the constituent materials of both the sub-tab 1021 and the cell carrier 1012 may comprise aluminum foil, and for a negative polarity sub-tab 1021, the constituent materials of both the sub-tab 1021 and the cell carrier 1012 may comprise copper foil. Further, the plurality of sub-tabs 1021 with positive polarity may be connected two by two to form the tab 102 with positive polarity, and the plurality of sub-tabs 1021 with negative polarity may be connected two by two to form the tab 102 with negative polarity.

It is understood that the tab 102 protruding from the cell 1011 in the laminated cell 10 may facilitate the contact of the laminated cell 10 with the outside, and when the laminated cell 10 supplies power to the outside, the lithium ions in the coating 1013 in the cell 1011 may pass through the cell carrier 1012 in the cell 1011 to move. Based on this, in the present embodiment, by providing the heating assembly 201 for heating the tab 102 in the hot-pressing device 20, in combination with the above discussion, the tab 102 with positive polarity may include a plurality of sub-tabs 1021 connected to the multi-layer battery cells 1011 with positive polarity, the tab 102 with negative polarity may include a plurality of sub-tabs 1021 connected to the multi-layer battery cells 1011 with negative polarity, and the metal foil has a high thermal conductivity, so that heat can be rapidly and uniformly transferred to the multi-layer battery cells 1011, so as to improve the uniformity of heating the battery cell pack 101, and further improve the reliability of subsequent shaping of the battery cell pack 101.

In one embodiment, the two tabs 102 are respectively connected to different sides of the core package 101. Of course, as shown in fig. 1, the two tabs 102 may also be connected to the same side of the electrical core package 101. It can be understood that, connect two utmost point ears 102 respectively in this embodiment in the different sides of electric core package 101, can pile up the side from at least two of multilayer electric core 1011 and carry out heat transfer to multilayer electric core 1011, compare the distribution situation of two utmost point ears 102 in fig. 1 promptly, can carry out heat transfer to multilayer electric core 1011 from the multi-direction, and is further, two utmost point ears 102 can connect respectively in electric core package 101 both sides far away from to further improve the homogeneity that heats electric core package 101, and near and further improve the follow-up reliability of carrying out the plastic to electric core package 101.

In one embodiment, as shown in fig. 1, the hot press apparatus 20 further includes: and the compressing assembly 202 is used for hot-pressing the electric core package 101, and the compressing assembly 202 and the tab 102 are located on different sides of the electric core package 101. The hot pressing is a process of heating and simultaneously pressing the plate blank after the paving and forming to manufacture the fiber board with certain mechanical strength and water resistance, that is, it can be considered that the pressing component 202 in this embodiment has a dual function of heating and pressing the electric core package 101, and here, whether the heating and pressing are simultaneously performed is not limited, it can be considered that on the basis that the heating component 201 heats the electric core package 101 through the tab 102, the pressing component 202 in this embodiment can also at least press the electric core package 101, so as to shape the electric core package 101 softened after the heating.

Of course, considering that the compressing assembly 202 may also heat the battery cell package 101, the compressing assembly 202 and the tab 102 in this embodiment are located on different sides of the battery cell package 101, and similarly, in combination with the above discussion that "the two tabs 102 are respectively connected to different sides of the battery cell package 101", it can be known that the compressing assembly 202 and the tab 102 may also perform heat transfer to the multilayer battery cell 1011 from different directions, and also may further improve uniformity of heating the battery cell package 101, and further improve reliability of subsequently shaping the battery cell package 101.

In an embodiment, as shown in fig. 1, the tab 102, the heating assembly 201, the battery core 1011, and the compressing assembly 202 are disposed in parallel, and the compressing assembly 202 is disposed near the battery core 1011 at the end of the battery core package 101. Specifically, as shown in fig. 1, the compressing assembly 202 may also include: a first hot press plate 2021; the second hot pressing board 2022 is disposed opposite to the first hot pressing board 2021, and the first hot pressing board 2021 and the second hot pressing board 2022 are used for clamping and hot pressing the battery cell package 101. Still further, because the multilayer battery core 1011 is stacked up and arranged, in order to apply pressure to the battery core package 101, the first hot pressing plate 2021 and the second hot pressing plate 2022 can be respectively arranged close to the battery core 1011 on the top layer and the battery core 1011 on the bottom layer, so that the gap between the battery core 1011 on the top layer and the battery core 1011 on the bottom layer and the gap between the battery core 1011 on the top layer and the battery core 1011 on the bottom layer can be reduced by applying pressure to the battery core 1011 on the top layer and the battery core 1011 on the bottom layer, and the thickness of each layer of battery core 1011 can be reduced, so as to better prevent later deformation, and thus the shaping of the battery core package 101 is realized.

In one embodiment, as shown in FIG. 1, the heating assembly 201 is movably coupled to the compacting assembly 202. It can be understood that, in this embodiment, the heating assembly 201 is movably connected to the compressing assembly 202, that is, the heating assembly 201 and the compressing assembly 202 are connected to each other, and specifically, the relative positions of the heating assembly 201 and the compressing assembly 202 can be adjusted in a state where the compressing assembly 202 and the cell pack 101 are relatively stationary, so as to control the relative positions of the heating assembly 201 and the tab 102, thereby clamping the tab 102 by the heating assembly 201, and further stably heating the tab 102. Of course, the heating assembly 201 and the compressing assembly 202 may also be independently arranged, that is, the relative positions of the heating assembly 201 and the compressing assembly 202 with respect to the laminated battery cell 10 may be independently controlled, so as to respectively clamp the tab 102 and the battery cell pack 101.

In one embodiment, as shown in fig. 1, the hot press apparatus 20 further includes: and the telescopic rod 203 is connected between the compressing assembly 202 and the heating assembly 201 and used for controlling the heating assembly 201 to move towards or away from the tab 102. It can be understood that, in the embodiment, by arranging the telescopic rod 203 to realize that the heating assembly 201 is movably connected to the compressing assembly 202, the relative positions of the heating assembly 201 and the tab 102 can be controlled by adjusting the length of the telescopic rod 203.

Specifically, for example, the heating assembly 201 includes the above-mentioned first heating plate 2011 and the second heating plate 2012, the pressing assembly 202 includes the above-mentioned first hot pressing plate 2021 and the second hot pressing plate 2022, and the telescopic rod 203, that is, it can be considered that a telescopic rod 203 is disposed between the first heating plate 2011 and the first hot pressing plate 2021, another telescopic rod 203 is disposed between the second heating plate 2012 and the second hot pressing plate 2022, and the telescopic rod 203 can be parallel to the stacking direction of the plurality of battery cells 1011. Further, one of them telescopic link 203 can control first hot plate 2011 and move in the direction of the orientation that piles up of multilayer electricity core 1011 to control the distance between first hot plate 2011 and utmost point ear 102, and is the same, and another telescopic link 203 also can control first hot plate 2011 and move in the orientation of the orientation that piles up of multilayer electricity core 1011, with the distance between control second hot plate 2012 and the utmost point ear 102, and both cooperation motions, in order to realize the centre gripping to utmost point ear 102.

In one embodiment, as shown in FIG. 1, the thickness of the compression assembly 202 is greater than the thickness of the heating assembly 201. It can be understood that, as discussed above, each sub-tab 1021 may be disposed to protrude from a side of the corresponding battery cell close to the stacking side, further, the length of the boundary line between each sub-tab 1021 and the corresponding battery cell is far smaller than the length of the side of the battery cell close to the stacking side, and the size of each sub-tab 1021 in the direction away from the corresponding battery cell may also be the size of the corresponding battery cell in the direction away from the corresponding sub-tab 1021, that is, the size of each sub-tab 1021 may be considered to be far smaller than the size of the corresponding battery cell, and therefore, the size of each tab 102 may also be considered to be far smaller than the size of the electrical 101 core package.

Therefore, in the present embodiment, by setting the thickness of the compressing assembly 202 to be greater than the thickness of the heating assembly 201, the bearing capacity of the compressing assembly 202 can be greater than that of the heating assembly 201, so as to satisfy the properties of size, weight and the like of both the electrical core package 101 and the tab 102. Further, the thickness of the heating assembly 201 may be set to be less than or equal to half the thickness of the pressing assembly 202.

The embodiment of the utility model provides a lamination electricity core is still provided, through as above arbitrary hot press unit preparation form, the battery capacity retention rate of lamination electricity core after charge-discharge 500 times is more than or equal to 95%. Specifically, as shown in fig. 3, L1 is a battery Capacity Retention rate-charge and discharge frequency curve obtained by performing different times of charge and discharge on a laminated battery cell manufactured by using the above-mentioned hot press apparatus at 25 ℃, and L2 is a battery Capacity Retention rate-charge and discharge frequency curve graph obtained by performing different times of charge and discharge on a laminated battery cell (a laminated battery cell not in the prior art can be understood) manufactured by using the above-mentioned hot press apparatus at 25 ℃, wherein the abscissa represents the Number of charge and discharge, the Number of charge and discharge is proportional to the Number of Cycle Number, and the ordinate represents the battery Capacity Retention rate (Capacity Retention). In fig. 3, "FC/1C" represents the current intensity of the battery at one hour of complete discharge under rapid charge, for example, a 18650 battery with a nominal size of 2200mA · h is discharged at 1C intensity for 1 hour of complete discharge, and the discharge current is 2200mA, and the specific value representing "1C" under rapid charge is not limited herein.

It can be understood, combine fig. 3 to show, curve L1 is located curve L2 above, show the utility model discloses a lamination electricity core that embodiment provided promotes to some extent for prior art's lamination electricity core, the battery capacity retention rate that has under the equal environment (for example the temperature is 25 ℃), combines the discussion above, can regard as the utility model provides a heat direct action that heating element 201 produced utmost point ear 102, further the side of piling up through multilayer electricity core is in order to transmit the heat to multilayer electricity core, has improved the homogeneity that heats electricity core package 101, and near and improve follow-up reliability of carrying out the plastic to electricity core package 101, finally can promote the battery capacity retention rate of lamination electricity core.

Similarly, based on the above principle, the embodiment of the utility model provides a lamination electricity core for prior art's lamination electricity core, the direct current internal resistance that has under equal environment also can reduce to some extent to improve the charge-discharge performance of lamination electricity core.

In order to better describe the above hot pressing apparatus, embodiments of the present invention further provide a hot pressing method based on the above hot pressing apparatus and the above laminated cell, as shown in fig. 4, which may include, but is not limited to, the following steps.

S1, the electrode lug is heated through the heating assembly, and heat is transferred to the battery cell bag through the electrode lug.

Wherein, combine the above discussion, electric core package can be including piling up the multilayer electric core that sets up, utmost point ear can connect in the side that piles up of multilayer electric core, and not be located the place side of top layer electric core or bottom electric core, utmost point ear can all contact with multilayer electric core through piling up the side, based on this, heat utmost point ear through heating element in this embodiment, the heat direct action that heating element produced promptly is utmost point ear, further through the side that piles up of multilayer electric core, utmost point ear can transmit the heat to multilayer electric core, in order to improve the homogeneity that heats to electric core package, and nearly and improve follow-up reliability of carrying out the plastic to electric core package.

Further, before step S1, the following steps may be included, but not limited to: the position of the electric core package is fixed through the compressing assembly. Specifically, can be earlier through other devices with electric core package removal to hot press unit, based on compress tightly first hot pressboard and the second hot pressboard that subassembly 202 includes relative setting, and first hot pressboard and second hot pressboard are close to the electric core that is located the top respectively and are located the electric core of low side, can control first hot pressboard and second hot pressboard relative motion, in order to be close to and centre gripping electric core package, owing to still not softening electric core package this moment, can be with the less that is acted on the pressure setting of electric core package, other devices can separate with electric core package afterwards. When the compressing assembly fixes the position of the electrical core package, the relative positions of the compressing assembly and the electrical core package may be referred to the above description about the relative positions of the compressing assembly and the electrical core package in fig. 1, that is, the relative positions may be the same as the relative positions when the compressing assembly thermally compresses the electrical core package.

Specifically, in combination with the above discussion about fig. 1, based on that the heating assembly includes the first heating plate and the second heating plate that are disposed oppositely, based on that the laminated cell and the compressing assembly are relatively static, the first heating plate and the second heating plate can be controlled to move in opposite directions by the two telescopic rods to approach and clamp the tab, and then step S1 is performed.

And S2, carrying out hot pressing on the electric core package through a pressing assembly.

Wherein, in combination with the discussion above, the pressing assembly pair can heat and pressurize the cell package, and the heating and pressurizing can be performed simultaneously or not. Specifically, in the process of step S1 execution, can carry out hot pressing to electric core package through compressing tightly the subassembly simultaneously, and further, compress tightly subassembly and heating element and can be located the different sides of electric core package to at least, when realizing heating lamination electric core, can follow a plurality of positions and carry out hot pressing to electric core package, further improve the homogeneity of heating.

Further, in step S2, after the compressing assembly and the heating assembly heat the laminated battery core, the pressure applied to the battery core package can be increased by the compressing assembly, so as to shape the softened battery core package.

An embodiment of the utility model provides a hot press unit and lamination electricity core. Set up to including the compressing tightly subassembly that is used for hot-pressing electric core package through with hot press unit, still include the heating element that carries out the heating to the utmost point ear in the lamination electricity core, make the heat direct action that heating element produced utmost point ear, further through the side of piling up of multilayer electricity core, utmost point ear can transmit heat to multilayer electricity core, thereby the technical problem who exists in the hot pressing mode of current lithium ion lamination battery heats inequality to electric core structure has been improved, in order to improve the homogeneity that heats to electric core package, and near and improve follow-up reliability of carrying out the plastic to electric core package.

The hot pressing device and the laminated battery cell provided by the embodiment of the present invention are described in detail above, and the principle and the implementation of the present invention are explained by applying specific examples herein, and the description of the above embodiments is only used to help understanding the technical scheme and the core idea of the present invention; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present invention in its various embodiments.

Claims

1. The utility model provides a hot press unit, its characterized in that for hot pressing lamination electricity core, lamination electricity core package and utmost point ear, electricity core package is including piling up the multilayer electricity core that sets up, utmost point ear is connected in the multilayer the side of piling up of electricity core, hot press unit includes:

the heating assembly is used for heating the tab so as to transfer heat to the electric core package through the tab;

2. The apparatus of claim 1, wherein the heating assembly comprises:

a first heating plate;

3. The hot-pressing device according to claim 1 or 2, wherein the laminated cell includes two tabs arranged in an insulating manner, and the hot-pressing device includes:

4. The hot pressing device according to claim 3, wherein the two tabs are respectively connected to different sides of the electric core package;

5. The hot press apparatus of any one of claims 1 to 4, wherein the compression assembly and the tabs are located on different sides of the electrical core package.

6. The autoclave apparatus of claim 5, wherein the heating assembly is movably connected to the hold-down assembly.

7. The hot-pressing apparatus as claimed in claim 6, further comprising:

8. The hot-pressing apparatus of claim 5, wherein the tab, the heating assembly, the cell and the compressing assembly are arranged in parallel, and the compressing assembly is arranged close to the cell at the end of the cell pack.

9. The apparatus of claim 5, wherein the thickness of the compression assembly is greater than the thickness of the heating assembly.

10. A laminated cell, manufactured by the hot-pressing apparatus according to any one of claims 1 to 9, wherein the capacity retention rate of the laminated cell after 500 charging and discharging cycles is greater than or equal to 95%.