Pressurized electrochemical cells and processes for making the same

Abstract

A pressurized electrochemical cell and a process for manufacturing the same, comprising: a plurality of connectors (1, 2); at least one electrochemical cell unit (3) having a plurality of electrical energy current collectors (5) connected to the connectors (1, 2), wherein the electrochemical cell unit (3) comprises a plurality of electrode plates (13) and a plurality of solid-state electrolyte plates (14) interposed between the electrode plates (13); and at least one deformable chamber (4) arranged in contact with the electrochemical cell unit (3), the deformable chamber (4) being supplied with a fluid that deforms the chamber (4) to exert pressure on the electrochemical cell unit (3).

Description

TECHNICAL FIELD

[0001] The present invention relates to energy storage systems, particularly to energy storage systems using electrochemical means, proposing a pressurized battery with solid electrolyte, which optimizes the contact between the components and increases the storage and discharge capacity of the battery, as well as the number of cycles that the battery can withstand, and the process for manufacturing it. BACKGROUND

[0002] The field of electrochemical batteries is a field that has been significantly developed through different technologies and applications. Currently, the leading battery technology is lithium ion, mainly due to its high energy accumulation capacity per unit of mass, as well as its resistance to multiple charge and discharge cycles.

[0003] These batteries are composed of a set of components. Among these components, the main components are the electrodes (anode and cathode) and the electrolyte. The anode is usually made of an active material such as graphite, and the cathode is made of another active material such as lithium oxide, which are usually in the form of plates. These materials can allow the donation or accumulation of lithium atoms. The electrolyte is usually a material with a certain amount of lithium salt, with the ability to allow the movement of lithium ions through this medium. The working principle of these batteries is that the anode and the cathode are two active materials capable of generating different reduction potentials, which, when the two electrodes are connected and in contact through an electrolyte that allows the movement of lithium ions, cause the generation of an electric current through an oxidation-reduction reaction.

[0004] The lack of lithium and other common materials in lithium oxide in the earth's crust, due to supply problems and monopolies, has prompted the search for alternative materials. The simplest alternative to lithium is sodium, an alkali metal with a very similar structure, but unlike lithium, sodium is one of the most abundant alkali metals on Earth. The use of sodium involves several adjustment factors (lower power density, larger atomic size, different active materials and electrolytes, among others) compared to lithium, but the principle of action is the same, so it is considered the most interesting method to reduce the cost of battery materials, especially for stationary applications, where the final weight of the battery is not as critical as in mobile applications.

[0005] In addition to the main components mentioned above, a series of materials (aluminum, copper, etc.) are usually used in the anode and cathode as electrical conductors to facilitate contact between the active materials and the conduction of the generated current to the outside of the battery. A separator material is usually used between the anode and the cathode, especially when using a liquid electrolyte, since direct contact between the anode and the cathode would cause chemical reactions to occur, thus damaging the battery. This separator material is usually a microporous polymer that allows the passage of ions.

[0006] The management of the battery temperature is a key aspect of the technology, since sometimes it is necessary to maintain a specific working temperature to optimize the operation. Moreover, it is also necessary to prevent uncontrolled heat conditions that can lead to so-called "thermal runaway" or uncontrolled exothermic reactions that can cause damage and even destruction of the battery.

[0007] In the field of electrolytes, it is common to use the liquid electrolytes already mentioned, generally based on organic solvents with a certain amount of lithium salt. However, this type of electrolyte has a series of drawbacks in terms of contact and wear during the manufacturing process and during the operation of the battery, which translates into poor performance and shorter life. For this reason, the field of batteries has begun to study the use of solid-state electrolytes to eliminate these problems.

[0008] With regard to the development of batteries using solid-state electrolytes, there is currently a major problem, which is the ability to create a good contact between the active material and the electrolyte. If the contact is not good, it is difficult for the ions to move from one electrode to the other, thus reducing the charge / discharge capacity and even the power density of the battery.

[0009] Moreover, especially in the case of sodium-ion batteries, the movement of ions from one electrode to the other involves a significant change in the volume of the electrodes, which can cause problems of deformation and rupture of certain components, thus causing damage or complete failure of the battery.

[0010] In addition, in the current field of batteries, the manufacturing process is focused on the manufacture of small batteries with limited production rates and semi-automatic manufacturing processes. This means that, in the final solution, the cost of lithium in the battery is approximately 2%, while the battery cells can represent 65% of the total cost, with the estimated cost of manufacturing the battery being quite high, representing 35% of the total cost of the battery.

[0011] Below, by way of example, a series of documents is listed that show the current manufacturing process of batteries, in other words, the use of lithium, liquid electrolytes and manufacturing processes with a low degree of automation.

[0012] Document WO2018008682 describes a battery manufacturing process, but it uses a liquid electrolyte in its composition, which involves complexity in the manufacturing and compromises its performance during operation.

[0013] Document US2018219252 describes a manufacturing process for a solid-state electrolyte battery, which uses lithium in the active material, without taking into account the scarcity of the lithium element and without using a system to control the pressure applied between the electrolyte and the electrodes.

[0014] Document US20020192553 proposes a sodium-ion battery with reversible operation, but its electrolyte is liquid, which complicates the automation of the battery manufacturing process and shortens the life of the battery.

[0015] Document KR101439080 describes a sodium battery with a solid-state electrolyte that maximizes the contact area between the electrodes and the electrolyte to achieve the maximum possible performance, but it does not use additional means to promote said contact and to be able to adjust it during the operation of the battery.

[0016] Document US2017250406 proposes a sodium-ion battery with a sodium metal anode and a solid ceramic electrolyte conductor of sodium ions, but its efficiency depends to a great extent on the quality of the contact between the electrodes and the electrolyte, and it does not use any other additional system to promote or maximize the contact, and it requires the addition of a second electrolyte to function correctly. SUMMARY

[0017] The present invention relates to an electrochemical cell with an improved structural implementation that makes it possible to enhance the contact between the active materials of the cell and the electrolyte, thus improving the performance and charge capacity of the cell. The present invention also relates to a process for manufacturing an electrochemical cell that enables the automation of the manufacturing process and the achievement of high production rates.

[0018] The pressurized electrochemical cell that is the object of the present invention comprises:

[0019] a plurality of anode connectors and cathode connectors,

[0020] at least one electrochemical cell unit, said at least one electrochemical cell unit having a plurality of electrical energy current collectors connected to said connectors, said electrochemical cell unit comprising:

[0021] a plurality of electrode plates, and

[0022] a plurality of solid-state electrolyte plates interposed between said electrode plates, and

[0023] at least one deformable chamber (deformable chamber member) arranged in contact with said electrochemical cell unit, wherein said deformable chamber is supplied with a fluid that deforms said chamber to exert pressure on said electrochemical cell unit.

[0024] This means that the deformable chamber supplied with a fluid can adjust and control the surface contact between the different plates of the electrochemical cell unit, optimizing the cell performance, enhancing the storage and discharge capacity of the cell, and increasing the number of charge cycles that the cell can withstand during its useful life.

[0025] According to an exemplary embodiment of the application, the battery comprises various electrochemical cells, each cell being arranged to be pressed between two deformable chambers. Preferably, the electrochemical cells have a cylindrical configuration and are arranged in a concentric distribution, which makes it possible to optimize the space occupied by the battery and to simplify its manufacture.

[0026] The deformable chambers are connected to a general pipe system that supplies a fluid, so that by means of the fluid it is possible to adjust the pressure exerted by the chambers and to cool the battery, which improves the storage capacity of the battery, among other things.

[0027] Preferably, the general pipe system has a delivery system for controlling the flow of entry into the general pipe system and a pressure regulator for adjusting the pressure inside the deformable chambers.

[0028] Each electrode plate comprises two layers of active material and one layer of conductive material, wherein the layers of active material partially cover both sides of the layer of conductive material, so that the ends of the layer of conductive material protrude with respect to the layers of active material, the protruding part of the layer of conductive material being used to make the current collector obtain electrical energy from the electrochemical cell to which the battery connector is connected.

[0029] According to an exemplary embodiment, the electrode plates are formed by anode and cathode plates of the same active material. According to another exemplary embodiment, the electrode plates are formed by anode and cathode plates of different active materials. In other words, a plurality of the electrode plates can be made of the same material or different materials, the plurality of the electrode plates being connected to an anode connector and the other electrode plates being connected to a cathode connector.

[0030] Preferably, the solid-state electrolyte is made of a polymer, a ceramic or a composite material.

[0031] Another object of the application is a method for manufacturing a pressurized electrochemical battery, the method comprising the following steps:

[0032] using a first roll having electrode plates coated on a solid-state electrolyte plate,

[0033] using a second roll having another electrode plate coated on another solid-state electrolyte plate,

[0034] using a rotating main shaft, the deformable chambers being positioned on the rotating main shaft,

[0035] alternately winding a first electrode plate having a solid-state electrolyte plate and a second electrode plate having another solid-state electrolyte plate on the deformable chambers,

[0036] encapsulating the assembly formed by the electrode plates, the solid-state electrolyte plates and the deformable chambers.

[0037] This obtains a method for manufacturing an electrochemical cell, which can be automated, thus enabling a high production rate and, therefore, minimising the unit manufacturing cost of the cell. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 A perspective view of a pressurized electrochemical cell according to a preferred embodiment of the present application is shown.

[0039] Figure 2 A longitudinal section view of a portion of the pressurized electrochemical cell in the previous figure is shown.

[0040] Figure 3 A schematic view of the layers forming the electrode plates arranged on the solid electrolyte plate is shown.

[0041] Figure 4 A partial view of the electrode plates of the previous figure is shown.

[0042] Figure 5 A perspective view of a pressurized electrochemical cell according to a preferred embodiment of the present application is shown. Figure 1 and Figure 2 A section view of a portion of the pressurized electrochemical cell in

[0043] Figure 6 A section view of a portion of the pressurized electrochemical cell in Figure 1 and Figure 2 A section view of a portion of the pressurized electrochemical cell in

[0044] Figure 7 A perspective view of a machine for carrying out the manufacturing of a pressurized electrochemical cell as shown in the exemplary embodiments in Figure 1 and Figure 2 A perspective view of a machine for carrying out the manufacturing of a pressurized electrochemical cell as shown in the exemplary embodiments in DETAILED DESCRIPTION

[0045] Figure 1 A perspective view of a pressurized electrochemical cell according to a preferred embodiment of the present application is shown, wherein the cell has a cylindrical configuration, but it is not limited to this configuration and the cell can take other shapes, without departing from the idea of the present application.

[0046] Figure 2 A section view of a portion of the pressurized electrochemical cell in Figure 1 shows the internal configuration of a preferred embodiment of the cell in

[0047] In Figure 2In a preferred exemplary embodiment, the battery includes a set of electrochemical battery cells 3, wherein each of the battery cells 3 is arranged between two deformable chambers 4 that receive fluid so that the fluid can change the size of the chambers 4, deforming the chambers 4 and thus compressing the elements constituting the electrochemical battery cells 3, thereby ensuring adequate contact between them.

[0048] Figure 2 The vertical black arrow shown on the electrochemical cell unit 3 indicates the direction in which the deformable chamber 4 applies pressure to the cell unit 3. Figure 2 The other black arrows indicate the direction of the fluid received by chamber 4.

[0049] exist Figure 1 and Figure 2 In a preferred embodiment, the electrochemical cell unit 3 has a cylindrical configuration and is arranged in a concentric distribution, thereby optimizing the space occupied.

[0050] Alternatively, each of the electrochemical cell units 3 may be individually or collectively covered by a sealing material, or arranged in a sealed package.

[0051] Alternatively, internal structural components may be present to separate each of the electrochemical cell units 3 of the battery.

[0052] In its simplest configuration, the battery will have a single electrochemical cell 3, which will be arranged on one of its long sides to contact a deformable chamber 4, and on its opposite long side to contact a fixed portion of the battery. Preferably, the single cell 3 will be arranged between two deformable chambers 4.

[0053] The electrochemical cell unit 3 has multiple current collectors 5 at each end. The current collectors 5 are secured by multiple flanges 6 (flange / flange members) and connected to connectors 1 and 2 via multiple electrical conductors 7. The current collector 5 at one end of the cell unit 3 is electrically connected to the anode connector 1, and the current collector 5 at the other end of the cell unit 3 is electrically connected to the cathode connector 2 of the cell.

[0054] Each of the deformable chambers 4 has a fluid inlet and a fluid outlet, which are connected to a manifold system 8 through which the fluid supplied to the chambers 4 circulates.

[0055] Preferably, the fluid supplied to chamber 4 is a cooling fluid, so that the deformable chamber has a dual function: on the one hand, regulating the pressure applied to the electrochemical cell unit 3; on the other hand, cooling the cell.

[0056] The chamber 4 thus has an adjustable temperature and pressure, both of which can be adjusted according to the specific operating conditions of the battery. The pressure and temperature can vary based on the processing state of the battery (charging, discharging or resting).

[0057] Since the pressure can be adjusted based on the operating conditions, in addition to improving the contact between the elements that make up the electrochemical cell 3, the battery also complies with the volume variations of the cell 3 in response to the ion exchange that occurs during the charging and discharging processes.

[0058] Preferably, the header system 8 has a delivery system 9 at the inlet of the header system 8 so that the incoming flow to the header system 8 can be controlled and, by virtue of this, the battery temperature, and a pressure regulator 10 so that the pressure inside the deformable chamber 4 can be adjusted and, by virtue of this, the contact between the elements that make up the cell 3.

[0059] The electrochemical cell 3 is arranged under vacuum and controlled atmosphere conditions inside the battery. Thus, the electrochemical cell 3 is mounted in a casing that is defined between two deformable chambers 4, which are closed at their ends by a plurality of lateral covers 11. The lateral covers 11 have a plurality of expansion seals 12 that are able to absorb the contraction experienced by the casing of the electrochemical cell 3 when the fluid of the chamber 4 deforms the casing of the electrochemical cell 3.

[0060] The electrochemical cell 3 is made up of a plurality of electrode plates 13 and a plurality of solid-state electrolyte plates 14, the electrode plates 13 being interposed between the solid-state electrolyte plates 14.

[0061] As Figure 3 shown, each electrode plate 13 comprises two layers of active material 131 and one layer of conductive material 132. The layers of active material 131 are arranged on both sides of the layer of conductive material 132, partially covering both sides of the layer of conductive material 132, so that the layer of conductive material 132 protrudes at its ends with respect to the layers of active material 131, said ends acting as electrical energy current collectors 5 that will be connected to the connectors or terminals 1, 2 to extract and generate the voltage and current desired in the battery design.

[0062] Also as Figure 3 shown, the electrode plates 13 are arranged on the solid-state electrolyte plates 14 so that the ends of the plates of conductive material 132 protrude with respect to the solid-state electrolyte plates 14, in other words, the current collectors 5 protrude with respect to the solid-state electrolyte plates 14.

[0063] The material of the electrode plates 13 depends on the final chemistry of the battery: in the case of lithium, the active material of the anode can be graphite and that of the cathode can be lithium oxide (LCO, LNO, NMO, NMC, etc.); while in the case of sodium, the electrode plates 13 can use, in the anode, an active material such as hard carbon and, in the cathode, sodium oxide, Prussian blue or even organic-based materials as active materials. In both cases, it is also possible to consider using lithium or sodium metal as the active material of the anode. The solid-state electrolytes 14 can be made of polymeric materials, ceramic materials or even composite materials.

[0064] Furthermore, the deformable chamber 4 is made of a deformable material, which includes an elastomer or even a metal, for example an aluminum film with limited thickness.

[0065] The electrode plates 13 can be continuous, as shown in Figure 5 or discontinuous, as shown in Figure 6 so that there is a spacing between the electrode plates 13. This will provide a degree of flexibility when the electrode material 13 is deformed, so that the electrode plates 13 can slide between them in response to the application of internal pressure, without undergoing mechanical stresses that can damage them.

[0066] Likewise, when the electrode plates 13 connected to the anode connector 1 and the electrode plates 13 connected to the cathode connector 2 are made of the same active material, the spacing between the electrode plates 13 helps to prevent short circuits.

[0067] As for the solid-state electrolyte plates 14, depending on the material type of the electrolyte, they can have a limited length arrangement of plates, as shown in Figure 6 or, if their mechanical properties allow it, they can be continuous, as shown in Figure 5 and deform in response to the applied pressure.

[0068] Preferably, the plates 13, 14 have a plurality of compartments (compartment means) in the radial direction of the battery, by means of which the plates 13, 14 are equipped with a plurality of ducts for an additional fluid with cooling properties. Said compartments can be connected to an additional system to supply a liquid or gaseous fluid, allowing the delivery of fluid through said ducts in addition to the fluid circulating through the deformable chamber 4. The use of a temperature-controlled tempered fluid in all the compartments and the chamber 4 enables thermal management, improving the performance of the battery, avoiding problems related to overheating and even allowing the production of a battery thicker than a set of plates 13, 14, thus increasing its storage capacity.

[0069] According to Figure 2In the embodiment shown, the current collectors 5 are interconnected, preferably by a welding process, and grouped by the flanges 6, so that the groups of electrode plates 13 that make up the electrochemical cell 3 are combined together by the current collectors 5. This means that there will be one contact zone in each cell 3 for each connector 1, 2. In another alternative configuration (not shown in the figures), there can be one contact zone at each of the lateral ends of the layer of conductive material 132 for each of the connectors 1, 2.

[0070] Preferably, the electrical conductors 7 that connect the current collectors 5 to the connectors 1, 2 are made of a flexible material, so that said material can withstand and adapt to the different deformations that the battery undergoes during its operation.

[0071] The battery is designed to have an external packaging 15 that acts as a barrier between different batteries that can be arranged in series, so that said packaging 15 prevents the battery from being in direct contact with the adjacent batteries.

[0072] The following section describes the process for manufacturing Figure 1 and Figure 2 batteries with a cylindrical configuration in the preferred embodiment shown, but it is obvious to a person skilled in the art that batteries with other configurations than cylindrical can be obtained using the described process, without departing from the idea of the invention.

[0073] As Figure 7 shown, the battery is manufactured by a winding process, in which the electrode plates 13 and the solid-state electrolyte plates 14 are sequentially overlaid on a deformable chamber 4.

[0074] To this end, a first winding 16 with electrode plates 13 (first plates) overlaid on a solid-state electrolyte plate 14 and a second winding 17 with another electrode plate 13 (second plate) overlaid on another plate solid-state electrolyte 14 are used. As will be explained below, the electrode plates 13 of the first winding 16 will be connected to the anode connector 1 and the other electrode plate 13 of the second winding 17 will be connected to the cathode connector 2.

[0075] In addition, the deformable chamber 4 is arranged on a rotating main shaft 18 and the plates 13, 14 of the first winding 16 and the second winding 17 are wound in an alternating manner on said deformable chamber 4 until the electrochemical cell 3 of the desired thickness is obtained on the chamber 4.

[0076] The electrode plates 13 overlaid on the solid-state electrolyte plates 14 have a similar configuration to that shown in Figure 3 and as described above. Thus, the electrode plates 13 comprise two layers of active material 131, a layer of conductive material 132 being located between the two layers of active material 131 and protruding with respect to the layers of active material 131.

[0077] By means of a plurality of rotating cutting dies 19, the end portions of the electrode plates 13 are partially cut to obtain a plurality of electrical energy current collectors 5. To this end, the electrode plates 13 are passed through the dies 19 to partially cut the layer of electrically conductive material 132 protruding with respect to the layer of active material 131.

[0078] As shown in detail in Figure 7 , the layer of electrically conductive material 132 protruding with respect to the layer of active material 131 of the plates 13 of the first roll 16 is trimmed on only one side, so that the current collectors 5 are defined for connection to the anode connector 1. Furthermore, the layer of electrically conductive material 132 protruding with respect to the layer of active material 131 of the plates 13 of the second roll 17 is trimmed on only the other side, so that the current collectors 5 are defined for connection to the cathode connector 2.

[0079] After obtaining the electrochemical cells 3, the current collectors 5 are provided with flanges and are welded to each other, then electrically interconnected to the current collectors 5 by means of a plurality of electrical conductors 7, and the current collector of one of the end portions of the cell 3 is electrically connected to the anode connector 1, the current collector 5 of the other end of the cell 3 is electrically connected to the cathode connector 2. Finally, the assembly formed by the electrode plates 13, the solid-state electrolyte 14 and the deformable chamber 4 is arranged in a package 15.

[0080] To obtain a battery with a plurality of electrochemical cells 3, as shown in Figure 2 , before packaging and electrically connecting the current collectors 5, a plurality of assemblies of electrode plates 13, solid-state electrolytes 14 and deformable chambers 4 are wound around each other in a concentric distribution.

[0081] To obtain the rolls 16, 17, first the layer of electrically conductive material 132, for example aluminum, copper or another more advanced material, for example lithium-aluminum alloy, is unwound automatically and is sent to a system for applying a coating to cover the layer of electrically conductive material 132 with a layer of active material 131.

[0082] The layer of active material 131 can be applied by a printing system, electrostatic adhesion or by any other method for coating or priming the layers, and it can even consist of a layer of active material 131 such as lithium or sodium metal. In this way the electrode plates 13 are obtained.

[0083] A solid-state electrolyte coating is then applied on the electrode plates 13, wherein the coating is applied on one or both sides of the electrode plates 13. In this way electrode plates 13 with solid-state electrolyte plates 14 are obtained. Preferably, the solid-state electrolyte plates 14 are applied from a roll of solid-state electrolyte material.

[0084] In one version of the invention, the electrode plates 13 and the solid-state electrolyte plates 14 are cut before being wound onto the deformable chamber 4. In another version of the invention, the electrode plates 13 are cut, but the solid-state electrolyte plates 14 are not cut. In yet another version, no cut is made in the plates 13, 14, so that the plates wound onto the deformable chamber 4 are continuous, rather than having a finite length.

[0085] The process described for manufacturing the rolls 16, 17 will be performed in a device with a controlled atmosphere, preferably with a relative humidity lower than 0.01% and preferably with a pressurized atmosphere that prevents leaks to the inside, in order to reduce the possibility of moisture entering the package. In an alternative version, the process described will be performed in a device with a strong vacuum, in order to achieve suitable working conditions.

[0086] The application of the solid-state electrolyte mainly isolates the active material from the external atmosphere, so that the process can be performed in an atmosphere without special requirements, as is the case with the active material, which requires a controlled atmosphere.

[0087] The rotating main shaft 18 is expandable, or has variable dimensions, so that it can be optimally adapted to different concentric deformable chambers 4. This means that one main shaft 18 can be used to manufacture batteries with battery cells 3 having different internal diameters.

[0088] In a preferred version of the manufacturing process, the temperature of the main shaft 18 and of the materials is controlled in a controlled manner, so that the final adjustment and contact between the components can be made more precise by means of controlled thermal expansion.

Claims

1. A pressurized electrochemical cell, characterized by, The pressurized electrochemical cell comprises: a plurality of connectors (1, 2), at least one electrochemical cell unit (3) having a plurality of electrical energy current collectors (5) connected to the connectors (1, 2), the electrochemical cell unit (3) comprising: a plurality of electrode plates (13) which are discontinuous so that there is a spacing between the electrode plates (13), and a plurality of solid-state electrolyte plates (14) interposed between the electrode plates (13), wherein the solid-state electrolyte plates (14) form a continuous layer between the discontinuous electrode plates (13), and at least one deformable chamber (4) arranged in contact with the electrochemical cell unit (3), wherein the deformable chamber (4) is supplied with a fluid which deforms the chamber (4) to exert pressure on the electrochemical cell unit (3), the pressurized electrochemical cell being in a concentric distribution of the assembly of the electrode plates (13), the solid-state electrolyte plates (14) and the deformable chamber (4).

2. The pressurized electrochemical cell of claim 1, wherein, The pressurized electrochemical cell comprises a plurality of electrochemical cell units (3), each cell unit (3) being arranged to be pressed between two deformable chambers (4).

3. The pressurized electrochemical cell of claim 2, wherein, The electrochemical cell unit (3) has a cylindrical configuration and is arranged in a concentric distribution.

4. The pressurized electrochemical cell of claim 2, wherein, Each of the electrochemical cell units (3) is mounted in a housing defined between two deformable chambers (4) which are closed at their ends by a plurality of lateral covers (11) having a plurality of expansion seals (12).

5. The pressurized electrochemical cell of any one of claims 1 to 4, wherein, The deformable chambers (4) are connected to a general pipe system (8) which supplies the fluid.

6. The pressurized electrochemical cell of claim 5, wherein, The general pipe system (8) has a delivery system (9) for controlling the incoming flow to the general pipe system (8) and a pressure regulator (10) for adjusting the pressure inside the deformable chambers (4).

7. The pressurized electrochemical cell of any one of claims 1 to 4, wherein, Each electrode plate (13) comprises two layers of active material (131) and one layer of conductive material (132), wherein the layers of active material (131) partially cover both sides of the layer of conductive material (132) so that the ends of the layer of conductive material (132) protrude with respect to the layers of active material (131).

8. The pressurized electrochemical cell of claim 7, wherein, The electrode plates (13) are formed by anode and cathode plates of the same active material.

9. The pressurized electrochemical cell of claim 7, wherein, The electrode plates (13) are formed by anode and cathode plates of different active materials.

10. The pressurized electrochemical cell of any one of claims 1 to 4, wherein, The solid-state electrolyte is made of a polymer, a ceramic or a composite material.

11. The pressurized electrochemical cell of any one of claims 1 to 4, wherein, The pressurized electrochemical cell further comprises electrical conductors (7) connecting the electrical energy current collectors (5) to the connectors (1, 2), the electrical conductors (7) being flexible.

12. The pressurized electrochemical cell of any one of claims 1 to 4, wherein, The electrode plates (13) and the solid-state electrolyte plates (14) are equipped with a plurality of conduits of additional fluid with cooling properties.

13. A manufacturing method for the pressurized electrochemical cell according to any one of claims 1 to 12, characterized by, The manufacturing method comprises: using a first roll (16) having electrode plates (13) coated on a solid-state electrolyte plate (14), using a second roll (17) having another electrode plate (13) coated on another solid-state electrolyte plate (14), using a rotating main shaft (18), the deformable chamber (4) is positioned on said rotating main shaft (18), winding the electrode plate (13) having said solid-state electrolyte plate (14) and the other electrode plate (13) having said other solid-state electrolyte plate (14) alternately on said deformable chamber (4), encapsulating the assembly formed by the electrode plate (13), the solid-state electrolyte plate (14) and the deformable chamber (4).

14. The manufacturing method according to claim 13, wherein winding a plurality of assemblies formed by the electrode plate (13), the solid-state electrolyte plate (14) and the deformable chamber (4) around each other in a concentric distribution before encapsulation.

15. The manufacturing method according to claim 13 or 14, characterized in that, using a plurality of rotating cutting dies (19) to partially cut the end of the electrode plate (13) to obtain a plurality of electrical energy collectors (5).

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