Electrically and thermally conductive current collector with electrodes and battery unit of heat exchanger

Abstract

The invention discloses a battery unit with a wound electrode, the edge of a tab at at least one end of the battery unit is bent to form a base and continuously extends through a wool buffer bridge, an electric heating conductor current collector is arranged at the end part of the battery unit and is sealed in a composite material box body through a packaging assembly, and the box body is provided with a flexible, elastic and electrically insulating main body; meanwhile, as an expansion container, when internal gas is generated due to electrochemical reaction between the anode and the cathode, combustible gas is contained and stored, the expansion container is sealed and isolated from the outside, internal pressure is monitored in real time through a built-in pressure sensor, and data is transmitted to a battery management system (BMS) and / or a battery unit controller in real time; the battery unit is provided with a heat exchange device and assembled into a module and a rack, and an air or air-liquid mixed passive or forced cooling system is adopted for heat dissipation.

Description

Technical Field

[0001] The present invention generally relates to energy cells and electrical energy storage devices. More specifically, the present invention relates to an electrode and an electrode bridge with a sponge or wool cushion to achieve extension and compression, for direct and continuous electrical conduction between the pole and the terminal, and also with thermal conductivity, an internal heat exchanger device for uniform cooling of the pole, the conductor collecting bridge is elastic and flexible, and ensures electrical and thermal sealing by maintaining contact pressure with the pole and the terminal during packaging, and it can fit tightly with all surfaces. Background Art

[0002] The pressure on the collecting bridge can be applied by a flexible and elastic body of the battery cell box, which can be located between the two ends of the battery cell or between the terminals. The body constitutes a part of the battery cell box structure and is a composite box structure.

[0003] In a battery cell, at least one current collector is welded to the exposed core portion, which is connected to the conductor of the positive or negative electrode, and the current collector conducts the current to the external output terminal. In high-power batteries, it is very important that the current collector conducts high current to the external output terminal in a stable manner.

[0004] In order to achieve higher conductivity and stable high current, it is advantageous to extend the contact area between the current collector and the positive and / or negative electrode core to increase the contact area and direct contact pressure between the current collector and the electrode while removing the welding points. In addition, due to the limited contact area of ​​the current collector, the heat generated by the electrode cannot be transferred to the terminal or the outside, resulting in hindered heat conduction.

[0005] However, in high-capacity laminated battery cells with more windings or layers, it is not easy to expand the contact area between the current collecting plate and the positive and / or negative electrode cores, resulting in an inability to effectively conduct the high current and heat generated by the electrodes, causing overheating.

[0006] The thermal conductivity required for cooling the electrodes is similarly limited, hampered by the inability of the current collector to adequately conduct heat through itself or its solder joints. Summary of the invention

[0007] The present invention solves the above problems by using a current and heat conductor collector bridge device, which uses a cushion made of wool mesh or compressed contact sponge, with a larger surface area than before, increasing the contact area between the current and heat conductor collector device and the battery cell electrodes (i.e., poles, anodes and / or cathodes). The device maintains the contact pressure applied to the electrodes, increases their contact area through pressure and deformation, and also has a mirror effect on the terminals. In the present invention, the device is called an electrical and thermal conductor collector bridge, which is made of conductive and thermal conductive materials and is a cushion made of wool mesh and compressed sponge inside the battery cell.

[0008] In terms of thermal conductivity, the device of the present invention ensures the thermal conductivity and constant cooling effect of the required electrode surfaces inside and outside the battery cell by expanding the contact area between the terminal and the electrode.

[0009] Through the present invention, heat is discharged from the battery cell directly from the electrode through the conductor collector bridge, while the external heat exchanger outside the battery cell can also ensure uniform, continuous and rapid cooling, which is achieved through a continuous internal and external electrical heat flow path.

[0010] The solution to the technical problem is presented by independent claims 1, 7, 8 and 10, and dependent claims 2, 3, 4, 5, 6 and 9 attached to the independent claims further embody the preferred solutions and implementation methods of the present invention.

[0011] It will be appreciated that one or more of the elements depicted in the drawings / illustrations may be implemented in a more independent or more integrated manner, or in certain cases may even be omitted, depending on the requirements of a particular application.

[0012] In addition, the proportions, dimensions, distances, scales, sizes and ratios in the drawings are only used to understand and illustrate the present invention and to show solutions to technical problems, but are not limited thereto.

[0013] The terms "box", "housing", and "capsule" are used to describe the packaging of the battery cell, the impermeability and sealing of the battery cell, and the tightness of the battery cell.

[0014] The term "continuous flow path" refers to a reversible bidirectional electrical and / or thermal path that is free from spatial, surface, area limitations, and mechanical limitations such as welding or contact pressure, which exists between at least two elements of the present invention.

[0015] The terms "wool mesh" and "compressed sponge pad" refer to an elastic or semi-elastic, deformable, compressible device that is formed into a shape by compression, deformation, pressure or extrusion, occupies a specific and / or variable space, and can be made of fabric, wire or blade, but not limited to these materials, provided that it has the described properties and is made of the reference material with electrical conductivity and / or thermal conductivity specified in the present invention, used for the contactor collector bridge and / or the reference material of the heat exchanger in the present invention. The contactor collector bridge in the battery cell described in the present invention can be made of copper, but not limited to copper, as long as the material meets the properties described for the collector bridge. The heat exchanger outside the battery cell of the present invention can be made of copper, boron nitride or boron nitride composite materials, or a mixture of these materials, but not limited to copper or boron nitride, as long as the material meets the properties described for the external heat exchanger. The elastic and / or flexible part of the box body located between and / or in the middle of the battery cell terminals can be made of silicon material, but not limited to silicon material, as long as the material has the properties of the battery cell body described in the present invention.

[0016] Beneficial effects of the invention: The present invention relates to a battery cell, which comprises at least one anode / cathode electrode assembly and can be used to form an electric energy storage device having at least one bridge. The bridge is an electrical and thermal current collector made of conductive and thermally conductive materials, in the form of a wool net and a compressed sponge pad, located inside the battery cell, and is a continuous contact bridge between the anode and / or cathode electrodes, and forms the basis of the electrode bottom and its terminal through the electrode tab or bend. The bridge increases the efficiency of electric and thermal energy transfer from the inside to the outside of the battery cell, directly transfers from the battery electrode to the outside, reduces the internal resistance of the battery cell, and reduces the material and manufacturing costs. The bridge is connected to another heat exchanger made of a thermally conductive material located outside the battery cell through the battery cell terminal or the surface of the cell shell, and the external heat exchanger is made of a wool net and a compressed sponge pad and contacts the outside of the battery cell. The heat exchanger conducts the heat inside the battery cell to the outside, forming an unimpeded continuous thermal chain from the inside of the battery cell to the outside until the passive or forced cooling source of the system, which can be extended to battery cells, modules, groups, strings and containerized systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other advantages of the present invention will become apparent from the detailed description with reference to the accompanying drawings, which are not drawn to scale to more clearly show details and in which like reference numerals represent like elements in the several views: Figure 1 is a perspective view of an anode-cathode electrode assembly including at least one separator, according to certain embodiments of the present invention.

[0018] Figure 2 is a vertical cross-sectional view of a battery cell assembly, according to certain embodiments of the present invention.

[0019] Figure 3 is a side view of a base and its components, according to certain embodiments of the present invention.

[0020] Figure 4 is a partial vertical cross-sectional view of a battery cell assembly and an external heat exchanger, according to certain embodiments of the present invention.

[0021] Figure 5 Details of a battery cell design with a current reverser, electrical insulation and thermal conductors, according to certain embodiments of the present invention.

[0022] Figure 6 It is a design detail of the elastically flexible body between the ends and / or terminals of the battery cell, according to certain embodiments of the present invention.

[0023] Figure 7 are battery cell design details, according to certain embodiments of the present invention.

[0024] Figure 8 is a design detail of the battery cell external contact heat exchanger, according to certain embodiments of the present invention.

[0025] Fig. 9 A heat exchanger design consisting of a thermally conductive material, a wool mesh, and a compressed sponge pad for the exterior of a prismatic battery cell, according to certain embodiments of the present invention.

[0026] Fig.10 A heat exchanger design consisting of a thermally conductive material, a wool mesh, and a compressed sponge pad for the exterior of a pouch-type battery cell is provided according to certain embodiments of the present invention.

[0027] Fig.11 A battery cell module with a hybrid gas-liquid forced cooling system, including an external heat exchanger, is shown in a horizontal cross-sectional view according to certain embodiments of the present invention.

[0028] Fig.12 yes Fig.11 Reference is made to a vertical view of a device according to some embodiments of the present invention.

[0029] Fig.13 yes Fig.11 and Fig.12 Reference module assembly, demonstrating the scalability of battery cell modules, and a central hybrid gas-liquid forced cooling system, according to certain embodiments of the present invention.

[0030] Fig.14 It is the continuous current chain of the present invention.

[0031] Fig.15 It is the continuous heat flow chain of the present invention. DETAILED DESCRIPTION

[0032] In a preferred embodiment of the present invention, the battery cell comprises at least one electrode assembly (109 / Figure 1 and 110 / Figure 1 , anode and cathode), whose electrodes are active composite materials (101 / Figure 1 and 102 / Figure 1 ) covers the edge of the pole ear, symmetrical coating, the anode ear edge (101 / Figure 1 ) and cathode ear boundary (102 / Figure 1 )relatively.

[0033] according to Figure 1 , two strip electrodes (103 / Figure 1 and 104 / Figure 1 ) showed partially covered active composites (108 / Figure 1 ), until the pole region (101 / Figure 1 and 102 / Figure 1 ), and contains an internal diaphragm (106 / Figure 1 ) and possible external diaphragm (105 / Figure 1 ), used to form a rechargeable battery cell. The assembly is arranged around an axis (107 / Figure 1 ) is wound to form a core, and there is no active composite material at the end of the electrode, i.e., the pole (101 / Figure 1 and 102 / Figure 1 ).

[0034] When forming an electrode assembly, the electrode (109 / Figure 1 and 110 / Figure 1 ) and diaphragm (105 / Figure 1 and 106 / Figure 1 ) are stacked together around the central axis (107 / Figure 1 ) are wound to form a central gap (111 / Figure 1 ), or a central core having a square and / or elastic shape for winding compression, but not limited to a square geometry. In an exemplary embodiment, the electrode (103 / Figure 1 ) can be the anode, and the electrode (104 / Figure 1 ) can be a cathode, a separator (105 and / or 106 / Figure 1 ) are used for electrical insulation to prevent short circuits, while the poles (101 and 102 / Figure 1 ) are opposite to each other in the axial direction, and no pole of the anode will touch any pole of the cathode.

[0035] In some embodiments, the conductive coating includes an active composite material for an electrode; in some embodiments, the active composite material of the electrode is a cathode active material; in other embodiments, the active composite material of the electrode is an anode active material. The active material of the electrode can be selected from the following materials: silicon materials (such as metallic silicon and silicon dioxide), graphite materials, graphene-related materials, hard carbon, soft carbon, carbon nanotubes, porous carbon, conductive carbon, lithium nickel manganese cobalt oxide (NMC), lithium manganese oxide (LMO), lithium cobalt oxide (LCO), lithium titanium oxide, nickel oxide, aluminum cobalt oxide (NCA), layered transition metal oxides (such as (LCO), (NMC), (NCA)), manganese spinel oxides (such as (LMO) or (LMNO)), olivine (e.g. ), chalcogenides (such as ), Tavi Mine (such as )、Silicon、Silicon Oxide( ), tin, aluminum, tin oxide ( )、Manganese oxide( )、Molybdenum oxide( )、Molybdenum disulfide( )、Nickel Oxide( )、Copper oxide( ) and lithium sulfide ( ) or a combination thereof.

[0036] In some embodiments, the first layer further comprises a binder for binding the active material to the surface of the electrode. The binder may be a polymer material such as polyvinylidene fluoride (PVDF), nitrile rubber (NBR), polyacrylic acid (PAA) or a mixture thereof. The binder provides stable mechanical and chemical properties to ensure that the active composite material can be firmly attached to the electrode during the charge and discharge process.

[0037] Some examples of the arrangement of active composite materials include but are not limited to mechanical deposition, electromechanical deposition, electrochemical deposition, or any combination of processes known to those skilled in the art, which are also applicable to the electrode substrate 103 ( Figure 1 ) and 104 ( Figure 1 ) on the deposition 108 ( Figure 1 ).

[0038] Reference Figure 1 , and combined with Figure 2 , pole piece 101 ( Figure 2 ) and 102 ( Figure 2) is bent, deformed, folded or compressed by any combination of processes known to those skilled in the art to form at least one base 113 ( Figure 2 ), which is located at the battery cell core 112 ( Figure 2 ) on one side, or on the opposite end, shown on the edge of the scroll.

[0039] Before winding, it is best to cut or cut the pole piece at the edge of the boundary after tensioning but before winding (such as Figure 3 a1, a2, a3, a4, b1, b2, b3) to allow for corner areas in square axial geometries (ABCD / Figure 3 ) for uniform winding.

[0040] The cutting process takes place before winding, and it may also be cut during the tensioning of the electrode tape (anode or cathode tape). The distance of the cutting position (such as a1, a2, a3, a4, b1, b2, b3 / Figure 3 ) is calculated based on the core radius of the winding shaft, whose size is affected by the cut angle a1 ( Figure 3 ) corner spacing and corresponding areas (such as area A / Figure 3 ) are affected by the distance between the . The calculation, adjustment, measurement, cutting and execution of these dimensions can be performed by any process known to those skilled in the art.

[0041] During the winding process (or after the winding of the battery cell core), the stretched, cut or slit pole pieces are bent, folded, deformed or compressed at an angle or radius relative to the winding axis. The bent pole pieces form at least one base at at least one end of the core, so that the pole pieces of the same type are in direct contact from one layer to another, belonging to the same electrode, partially or completely overlapping, forming electrical and thermal continuity over the entire surface of the electrode base.

[0042] Some embodiments include bending, deforming, folding or compressing the side of the core to provide a bent, folded, deformed or compressed portion, i.e., a base, at the pole piece, and the pole piece portion at the end of the pole piece is formed by its edge and / or layer (e.g., Figure 3 The pole pieces may be partially or completely overlapped by a1-L1 and b1-L2). The cutting and slitting of the pole pieces may be accomplished by any process known to those skilled in the art, such as using fiber laser cutting during the tensioning process.

[0043] The electrode is wound around an axial geometry to form a roll of the original geometry, but is not limited to the original geometry. The axial geometry adopts a square shape to increase the material volume density, which is advantageous over a circular or oval geometry because the square shape can fill the ends and corners of the module and battery cell block, while a circular or oval geometry may cause degradation of the electrodes, especially the anode and cathode, in the curved area.

[0044] The preferred embodiment of the present invention uses a square core geometry, with Figure 3 By combining the cuts shown in Figure 3 ) to avoid overlapping between regions, forming a regular base with a large and orderly contact surface area on the base. In addition, this device of folding and overlapping regions ensures the regularity and electrical and thermal conductivity continuity of the core base of the battery cell.

[0045] like Figure 2 As shown, a bridging device (i.e., an electrically and thermally conductive current collector) made of electrically and thermally conductive materials, such as copper mesh or copper wire, is used as a buffer layer inside the battery cell. This device can effectively conduct heat and provide a uniform contact surface area.

[0046] In addition, the characteristics of the bridge device make it suitable for forming a structural connection between the pole pieces, thereby improving thermal performance and enhancing the overall stability of the battery cell. The bridge device can be produced or customized according to the requirements of the battery design through different manufacturing processes known to those skilled in the art.

[0047] refer to Figure 6 and Figure 7 , elastic body 126 ( Figure 7 ) as axial pressure device 142 ( Figure 7 ) is applied to the assembled parts of the battery cell, including: anode and cathode cores, base, conductor bridge, terminals and battery casing. Its characteristics are the ability to seamlessly maintain pressure and / or contact axial compression between these parts, ensuring the continuity of electrical and thermal flow inside the battery and between its elements, while not hindering the surface and / or shape.

[0048] refer to Figure 6 and Figure 7 , elastic body 126 ( Figure 7 ) as axial pressure device 142 ( Figure 7 ) is applied to the assembled parts of the battery cell, including: anode and cathode cores, base, conductor bridge, terminals and battery casing. Its characteristics are the ability to seamlessly maintain pressure and / or contact axial compression between these parts, ensuring the continuity of electrical and thermal flow inside the battery and between its elements, while not hindering the surface and / or shape.

[0049] refer to Figures 1 to 7and Figure 8 , battery cell 128 ( Figure 8 ) can be assembled in groups, modules, blocks and / or packages. A heat exchange device consisting of a heat conductive material, a wool mesh and a compressed sponge pad is attached to the outside of the battery housing and fixed to the battery cell housing 128 ( Figure 8 ) and in contact with the housing wall to achieve battery cooling. These heat exchange devices 119 ( Figure 8 ) can partially or completely wrap the battery cells and can cover the batteries horizontally or vertically, without limitation in the covering direction, as long as they can enter the cooling flow of the battery, they constitute an important part of the present invention.

[0050] refer to Figure 8 and Fig. 9 , heat exchange device 119 ( Fig. 9 ) is suitable for prismatic battery cells 129 ( Fig. 9 ), these units are an important part of the present invention. Modules and blocks can be assembled together in various combinations known to the skilled person. The prismatic battery cells are cooled by heat exchange devices embedded between the prismatic cells, ensuring contact with the battery surface and filling of the space between the cells. Even when the space between the cells changes in volume, the heat exchange device 119 ( Fig. 9 ) still ensures the continuity of thermal conductivity and the maintenance of the heat flow chain, working in conjunction with passive or forced cooling systems.

[0051] refer to Figure 8 and Fig.10 , heat exchange device 119 ( Fig.10 ) is also applicable to the soft pack battery cell 130 ( Fig.10 ). The pouch cell is cooled by heat exchangers embedded between the pouch cells, which are in contact with the cell surface and fill the space between them. These heat exchangers ensure continuity of heat transfer even under volume changes and can be cooled by passive, forced or gas-liquid hybrid cooling systems.

[0052] The battery module provided by the present invention ( Fig.11 ) contains at least two battery cells and has a continuous heat flow chain ( Fig.15 For example, in a horizontal view, the module can adopt a gas-liquid mixed cooling method. Battery cell 131 ( Fig.11 ) is generated by a heat exchanger 119 ( Fig.11 ) is absorbed and then directed to the cooling radiator 132 ( Fig.11 The radiator removes heat through the liquid cooling system, completing the module assembly 133 ( Fig.11 ) for cooling.

[0053] The cooling flow of the module can be gas or gas-liquid mixed cooling, which is provided by the front fan 134 ( Fig.11 ) provides forced cooling, forming a closed or semi-closed cooling loop. The cooling flow circulates between battery cells, radiators and modules to ensure heat exchange efficiency of the entire system.

[0054] refer to Fig.11 , Fig.12 and Fig.13 The modules of the present invention can be assembled by stacking or stacking ( Fig.13 ), constituting an electric energy storage device 144 ( Fig.13 The modules can be independent air-liquid hybrid cooling systems or connected to a central liquid cooling loop through pumps and pipes ( Fig.13 The modules can be installed and removed like drawers without disturbing the physical, mechanical or thermal performance.

[0055] Battery module or block ( Fig.13 ) may include an independent forced cooling system, such as a front fan 134, a side radiator 132, an intake area 137, and a push area 138. The heat exchangers are distributed between the cells or within the modules to ensure the heat exchange performance of the modules in a closed or semi-closed cooling loop.

[0056] The closed cooling system is an integral part of the present invention. Fig.13 Rack cooling system shown (144 / Appendix Fig.13 ) usually uses liquid cooling, through pipes (139 / Attachment Fig.13 and 140 / Attached Fig.13 ) is supplied with coolant by a pump and piped to the rack (144 / Attachment Fig.13 ), for the heat sinks on both sides of the module (132 / Attached Fig.13 ) and / or supply liquid to the radiators on both sides of the rack (144 / Attachment Fig.13 ).

[0057] Fig.13 The module components shown in (133 / Appendix Fig.13 ) can include modules with their own forced cooling and / or hybrid cooling systems, equipped with front fans (134 / Attachment Fig.13 )、Side radiator (132 / attached Fig.13 )、Inhalation area(137 / Attachment Fig.13 )、Exhaust area(138 / Attached Fig.13 ), and heat exchangers between battery cells in the module, which are arranged for each module or module group, as shown in the following Fig.13 As shown, and as an integral part of the present invention.

[0058] Battery module or component block (133 / Attached Fig.13 ) is removable, can be assembled and disassembled, and is designed to be inserted into the rack in a drawer-like form without physical, mechanical and / or thermodynamic conflict with the liquid cooling circuit; the radiator on the side of the module is fixed and separated from the liquid cooling circuit of the rack, which provides cooling for the equipment of the power storage device and is separated from the forced air cooling flow of the battery module.

[0059] Fig.14 The continuous flow electrical chain described in the present invention is reversible, bidirectional, and is not hindered or limited by materials, joints, welds, or contact surface areas. Figure 1 ) through the pole (102 / attached Figure 1 ) reaches the bottom of the battery core (114 / Attached Figure 2 ), through the pole (102 / attached Figure 2 ) is connected to the electrical and thermal conductor collection bridge made of conductive and thermal conductive materials (wool mesh and compressed sponge pad inside the battery cell) (116 / Attachment Figure 2 ); if applicable, connect to CT current reversing contactor (123 / App. Figure 5 ), and then connected to the external terminals of the battery case (118 / Attached Figure 2 and / or 118 / Attachment Figure 4 ). This assembly constitutes a continuous chain of current flow and conductivity, is an integral part of the present invention, and can be realized by any combination of processes known to those skilled in the art.

[0060] Fig.15 The continuous flow heat chain described in is also reversible, bidirectional, and is not hindered or limited by materials, joints, welds, or contact surface areas. Figure 1 ) through the pole (102 / attached Figure 1 ) reaches the bottom of the battery core (114 / Attached Figure 2 ), through the pole (102 / attached Figure 2 ) is connected to the electrical and thermal conductor collection bridge made of conductive and thermal conductive materials (wool mesh and compressed sponge pad inside the battery cell) (116 / Attachment Figure 2 ); if applicable, connect to CT current reversing contactor (123 / App. Figure 5 ), and then connected to the external terminals of the battery case (118 / Attached Figure 2 and / or 118 / Attachment Figure 4 ), and then reaches the heat exchanger made of thermal conductive material (wool mesh and compressed sponge pad outside the battery) (119 / Attachment Figure 4 ), and then reach the forced liquid cooling radiator (132 / Attached Fig.11 , 132 / Attachment Fig.12 and 132 / Attached Fig.13 ), through the mixed gas-liquid cooling flow (136 / Attached Fig.11 ), enter the central liquid cooling system (139-140 / Attached Fig.13 ), forced circulation by a water pump. This assembly constitutes a continuous heat flow and heat conduction chain, is an integral part of the present invention, and can be realized by any combination process known to those skilled in the art.

[0061] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A battery cell, characterized in that: It contains at least one assembly consisting of an electrode, an anode and a cathode, which is covered with an active composite material to the edge of the electrode, and the active material is arranged in a symmetrical manner, with the anode electrode boundary facing the cathode electrode boundary. At least one electrode edge is bent to form a base at at least one end, and is connected to at least one current collecting bridge made of an electrically conductive and thermally conductive material, which can be a wool mesh or a compressed contact sponge pad. The electrode assembly and the current collecting bridge together constitute the core of the battery cell, which is enclosed in a battery cell box, and the battery cell comprises: a separator between the anode and cathode electrodes; The assembly including the electrode, the electrode tab and at least one separator is wound around a geometric central axis to form a roll structure; The tabs are bent at at least one end and partially or completely overlap each other through their edges and / or layers to form a base; The current collecting bridge made of conductive and thermal conductive materials, including wool mesh and compressed sponge pad, is continuously arranged and / or connected to at least one base composed of pole ears. The current collecting bridge is formed and directly contacts and maintains pressure or compression with the surface of the core base, the surface of the battery cell terminal or the inner surface of the battery cell box; the current collecting bridge enters the tiny pores on the surface of the base, increases the contact area with the help of pressure or compression, fills the gap between the electrode roll and the battery cell box, or forms a continuous electric heating chain with the terminal; A box body including a flexible and / or elastic body, located between the two ends of the core or between the battery cell terminals, the flexible body is airtightly isolated from the box wall and the outside of the box body, and can be made of an electrically insulating material; Built-in pressure sensors, pressure transmitters or pressure transducers are used to measure the pressure inside the battery cell and detect the gases produced by the electrochemical reaction.

2. The battery cell according to claim 1, characterized in that: It also includes an electrode wound on a geometric central axis, the central axis is preferably a square, and can form a rolled structure consistent with the square core geometry, at least one electrode edge is cut at the corner in a strip-like manner (101) so as to evenly wrap and bend the layers of the base (a1-L1) and (b1-L2) and the edges between the base area (117).

3. The battery cell according to claim 1, characterized in that: The invention comprises a flexible and / or elastic body (126) as an expansion container device (143) inside a battery cell, which is used to store gas inside the battery cell. The device acts as an internal volume exchanger, which is airtightly isolated from the outside of the battery cell, and is particularly used to store gas generated by the electrochemical reaction between the anode and the cathode of the battery cell. The device has the performance of storing pressurized gas inside and ensures that the storage pressure is lower than the critical level that damages the box body or leaks the internal gas to the outside.

4. The battery cell according to any one of claims 1 to 3, characterized in that: Further comprising a flexible and / or elastomeric body as a device (142) for applying axial pressure and / or compression to a core component, the core component comprising an anode and a cathode, a base, a collecting bridge, a terminal and at least one inner surface of the box body, the axial pressure device having the characteristics of pressure and / or axial contact compression to maintain a seamless connection between the components, ensuring continuous electrical and thermal flow within the battery cell without surface and / or shape obstacles.

5. The battery cell according to any one of claims 1-2, characterized in that: Further comprising a heat exchange device made of a heat conductive material, including a wool mesh and a compressed sponge pad, located outside the battery cell (119), forming a pouch-type battery cell (130) and / or a prismatic battery cell (129), the heat exchange device being attached to and contacting the outer wall of the battery cell box, and being located in, but not limited to, the electrical and thermal conductive collector bridge region inside the battery cell, the heat exchange device continuously conducts heat from the collector bridge and / or the anode / cathode core inside the battery cell or the heat radiation region of the pouch-type and / or prismatic battery, and transfers the heat to an external passive or forced cooling system.

6. The battery cell according to any one of claims 1 to 4, characterized in that: The device further comprises an internal pressure sensor, a pressure transmitter and / or a pressure converter (141), which is installed in a battery cell or a battery cell box and can be connected to a battery management system (BMS) and / or a main control unit (MCU) controller to transmit pressure data and information on flammable gases generated in the initial stage of the anode and cathode reactions of the battery cell in real time in an "input" and "output" manner, and detect flammable and explosive gases generated by the electrochemical reactions of the electrodes.

7. A battery module, characterized in that: The module comprises at least two battery cells according to any one of claims 1 to 6, and the module further comprises a heat exchanger assembly according to claim 5, wherein the heat exchanger is made of a thermally conductive material, including a wool mesh and a compressed sponge pad, and is placed between the battery cells and / or wraps the battery cells, and / or fills the gaps (128), (129) and / or (130) between the battery cells, and its shape, volume or surface is not limited. The heat exchanger is capable of continuously transferring the heat flow generated by the battery cells to a passive or active cooling system, which cooling system can be a separate cooling system of the module.

8. A battery module, characterized in that: An assembly comprising at least two battery cells according to any one of claims 1 to 7, wherein the module comprises: A front fan (134) having upper and lower cold air flow pushing areas (138) and a side air suction area (137); The holes (135) above and / or below the battery cells guide the cold air flow to the cooling area, increase the pressure of the cold air flow push area (138) by blocking the cold air flow, make the flow uniform, and maintain the continuity of cooling on all cold air flow distribution surfaces until the battery cell heat exchanger (119); The cold air intake area (137) absorbs the cold air through the heat exchanger (119) between the battery cells and / or the side (136) of the battery cells, and is connected to the liquid cooling radiator area (132), including the side radiator and / or edge radiator of the module.

9. The battery module according to any one of claims 5, 7 and 8, characterized in that: Further comprising at least one pouch battery cell or pouch battery cell assembly (130) and / or at least one prismatic battery cell or prismatic battery cell assembly (129), the module comprises: A heat exchanger made of a thermally conductive material, comprising a wool mesh and a compressed sponge pad, is placed between the battery cells and / or wraps the battery cells, and / or fills the gaps between the battery cells, without being restricted by surface, volume or shape, and the heat exchanger continuously transfers the heat flow of the battery cells to a passive or active cooling system, which may be a cooling system of the module; A front fan having areas for pushing cold air above and below the battery unit and areas for sucking cold air from the sides; The holes above and / or below the battery cells direct the cold airflow to the cooling area, increase the pressure in the push area by blocking the cold airflow, make the cold airflow evenly distributed, and continuously cool the battery cell heat exchanger on all cold airflow distribution surfaces; The cold air flow intake area absorbs the cold air flow through the heat exchanger of the battery cell and / or the side of the battery cell and is connected to the liquid cooling radiator area, including the side radiator and / or edge radiator of the module.

10. A rack, characterized in that: An electric energy storage device comprising at least two modules, according to any one of claims 7 to 9, wherein the module is a hybrid gas-liquid cooling module, the module assembly forms a rack (144), the rack comprises a side radiator (132), which is arranged at the edge of the module and / or the side edge of the rack, and a liquid coolant is pumped by a central pump, the module (133) is detachable and can be assembled and disassembled without interfering with the liquid cooling system, the module can be inserted into a shelf in the rack like a drawer, and will not interfere with or cause technical conflicts with the side radiator (132) and / or the central liquid cooling flow path (139-140) fixed to the rack, thereby ensuring the normal operation of the cooling circuit of the side edge of the rack or the technical structure of the module.

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