WO2025001166A1 - 储能装置、储能模组及用电设备 - Google Patents

储能装置、储能模组及用电设备 Download PDF

Info

Publication number
WO2025001166A1
WO2025001166A1 PCT/CN2024/076292 CN2024076292W WO2025001166A1 WO 2025001166 A1 WO2025001166 A1 WO 2025001166A1 CN 2024076292 W CN2024076292 W CN 2024076292W WO 2025001166 A1 WO2025001166 A1 WO 2025001166A1
Authority
WO
WIPO (PCT)
Prior art keywords
sub
energy storage
partition member
protrusion
storage device
Prior art date
Application number
PCT/CN2024/076292
Other languages
English (en)
French (fr)
Inventor
胡岳霖
徐卫东
Original Assignee
厦门海辰储能科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 厦门海辰储能科技股份有限公司 filed Critical 厦门海辰储能科技股份有限公司
Publication of WO2025001166A1 publication Critical patent/WO2025001166A1/zh

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/618—Pressure control
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/112—Monobloc comprising multiple compartments
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/471—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
    • H01M50/474—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by their position inside the cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/471—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
    • H01M50/477—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by their shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/471—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
    • H01M50/48—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by the material
    • H01M50/486—Organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of energy storage technology, and in particular to an energy storage device, an energy storage module and electrical equipment.
  • some energy storage devices need to be placed flat when working.
  • the electrode assemblies in the energy storage device are stacked. After the electrolyte in the energy storage device is consumed, its liquid level will drop, causing the electrode assemblies on the upper layer to be unable to be infiltrated by the electrolyte, affecting the performance of the energy storage device.
  • the present application provides an energy storage device, an energy storage module and an electrical device, which are used to solve the problem in the prior art that when the energy storage device is placed flat, the upper electrode assembly cannot be soaked in electrolyte.
  • the present application provides an energy storage device, including an end cap assembly, an electrode assembly, a partition, a protective member and a shell, wherein the partition is provided with a through groove and a through hole, wherein the through groove and the through hole both penetrate the partition along the thickness direction of the partition, and the through groove and the through hole are arranged at intervals;
  • the protective member is provided with a first accommodating cavity, wherein the first accommodating cavity has a first opening, wherein the partition and the electrode assembly are both accommodated in the first accommodating cavity, wherein the electrode assembly passes through the through groove, and the electrode assembly is sealed and connected to the groove wall of the through groove;
  • the partition is sealed and connected to the cavity wall of the first accommodating cavity, and the first accommodating cavity is divided into a first sub-accommodating cavity and a second sub-accommodating cavity.
  • the first sub-receiving chamber is connected to the first opening, and the through hole connects the first sub-receiving chamber and the second sub-receiving chamber;
  • the electrode assembly, the partition member and the protective member are all accommodated in the shell, the end cover assembly is installed at one end of the shell, the end cover assembly seals the shell, the end cover assembly is opposite to the first opening and connected to the protective member, and the electrolyte of the energy storage device is accommodated in the shell and the first receiving chamber;
  • a pressure difference can be generated between the first sub-receiving chamber and the second sub-receiving chamber, so that the electrolyte in the first sub-receiving chamber flows to the second sub-receiving chamber through the through hole.
  • the present application provides an energy storage module, comprising a plurality of energy storage devices, wherein the plurality of energy storage devices are electrically connected.
  • the present application provides an electrical device, comprising an energy storage module, wherein the energy storage module is used to supply power to the electrical device.
  • the embodiment of the present application forms a first sub-containing chamber and a second sub-containing chamber of different sizes by setting a partition.
  • the air pressure difference between the first sub-containing chamber and the second sub-containing chamber forms a liquid level difference of the electrolyte between the two chambers.
  • the smaller second sub-containing chamber can maintain a higher liquid level to achieve continuous infiltration and replenishment of the second electrode assembly. Even if the electrolyte level is lowered, it will not affect the infiltration of the electrolyte on the side of the winding core away from the bottom surface, thereby significantly improving the service life of the energy storage device.
  • FIG1 is an application scenario diagram of a household energy storage system provided in an embodiment of the present application.
  • FIG2 is a schematic diagram of the structure of an energy storage device provided in an embodiment of the present application.
  • FIG3 is an exploded view of the structure of the energy storage device shown in FIG2 ;
  • FIG4 is a schematic structural diagram of the electrode assembly shown in FIG3 ;
  • FIG5 is a schematic structural diagram of the partition member shown in FIG3 ;
  • FIG6 is a schematic structural diagram of the protective member shown in FIG3 ;
  • FIG7 is a schematic diagram of the structure in which the partition member is fixedly connected to the protective member
  • FIG8 is a schematic structural diagram of the housing shown in FIG3 ;
  • FIG. 9 is a partial structural perspective view of the energy storage device shown in FIG. 2 .
  • FIG. 10 household energy storage system 1000; energy storage device 100; electric energy conversion device 200; user load 300; end cap assembly 10; electrode assembly 20; partition member 30; protective member 40; housing 50; positive electrode column 11; negative electrode column 12; explosion-proof valve 13; main body 21; positive electrode ear 22; negative electrode ear 23; first end 24; second end 25; side portion 27; first electrode assembly 20A; second electrode assembly 20B; recess 26; first recess 26A; second recess 26B; bottom plate 31; top plate 32; Side plate 33; through groove 37; first sub-side plate 33A; second sub-side plate 33B; through hole 34; first protrusion 35; first contact surface 351; second contact surface 352; second protrusion 36; third contact surface 361; fourth contact surface 362; first accommodating cavity 41; first opening 42; bottom wall 43; top wall 44; first side wall 46; second side wall 45; first sub-side wall 45A; second sub-side wall 45B; second accommodating cavity 51; second opening 52; support plate 60; first sub-accommod
  • FIG. 1 is an application scenario diagram of a household energy storage system 1000 provided in an embodiment of the present application.
  • FIG1 shows a household energy storage system, which includes an energy storage device 100 and an electric energy conversion device 200 (such as a photovoltaic panel), and a user load 300 (such as a street lamp, household appliances, etc.), and the energy storage device 100 is a small energy storage box that can be mounted on an outdoor wall by wall-mounting.
  • the electric energy conversion device 200 can convert solar energy into electric energy during the period of low electricity prices, and store it through the energy storage device 100, and then supply the user load 300 for use during the peak electricity price, or supply the user load 300 for use when the power grid is out of power/power outage.
  • the energy storage device 100 includes at least one group of chemical batteries, using the chemical elements in the chemical batteries as energy storage media, so as to realize the charging and discharging process through the chemical reaction or change of the energy storage medium.
  • the electric energy generated by light energy and wind energy is stored in at least one group of chemical batteries through the chemical reaction or change of the energy storage medium, and when the use of external electric energy reaches a peak, the electric energy stored in at least one group of chemical batteries is released for use through the chemical reaction or change of the energy storage medium, or transferred to a place where the electric energy is scarce for use.
  • FIG. 2 is a schematic diagram of the structure of an energy storage device 100 provided in an embodiment of the present application.
  • the present application provides an energy storage device 100, an energy storage module (not shown) including a plurality of energy storage devices 100, and an electrical device (not shown) using the energy storage module.
  • the energy storage device 100 is described by taking a battery as an example.
  • the energy storage module may include but is not limited to a battery module, a battery pack, a battery system, and the like.
  • Electrical devices may include but are not limited to large energy storage containers used in grid-side energy storage scenarios, small and medium-sized energy storage cabinets used in industrial and commercial energy storage scenarios (banks, shopping malls, etc.) on the user side, and small household energy storage boxes used in home energy storage scenarios on the user side.
  • the length direction of the energy storage device 100 shown in FIG. 2 is defined as the X-axis direction
  • the width direction of the energy storage device 100 is defined as the Y-axis direction
  • the thickness direction of the energy storage device 100 is defined as the Z-axis direction.
  • the X-axis direction, the Y-axis direction, and the Z-axis direction are mutually perpendicular. It should be noted that the same as described in this application is allowed to have a certain range of tolerance.
  • the directional terms such as “up”, “down”, “inside”, and “outside” mentioned in the description of the embodiment of the present application are described based on the directional shown in FIG.
  • FIG. 3 is a structural exploded view of the energy storage device 100 shown in FIG. 2 .
  • the energy storage device 100 includes an end cap assembly 10, an electrode assembly 20, a partition 30, a protective member 40 and a shell 50.
  • One end of the electrode assembly 20 is connected to the end cap assembly 10
  • the partition 30 is fixedly connected to the protective member 40
  • the protective member 40 and the partition 30 are both sleeved around the periphery of the electrode assembly 20, the electrode assembly 20, the partition 30 and the protective member 40 are all accommodated in the shell 50
  • the end cap assembly 10 is installed at one end of the shell 50 and seals the shell 50.
  • the end cap assembly 10 includes a positive pole 11, a negative pole 12 and an explosion-proof valve 13.
  • the positive pole 11 and the negative pole 12 are respectively located at opposite ends of the end cap assembly 10 and are spaced apart.
  • the positive pole 11 and the negative pole 12 are both made of metal materials.
  • the positive pole 11 is used as the positive terminal when the energy storage device 100 is connected to other devices
  • the negative pole 12 is used as the negative terminal when the energy storage device 100 is connected to other devices.
  • the explosion-proof valve 13 is located between the positive pole 11 and the negative pole 12, and is spaced apart from the positive pole 11 and the negative pole 12. When the pressure inside the energy storage device 100 is too high, the explosion-proof valve 13 can automatically open and release the pressure to prevent the energy storage device 100 from exploding.
  • FIG. 4 is a schematic structural diagram of the electrode assembly 20 shown in FIG. 3 .
  • the electrode assembly 20 is generally plate-shaped and is used to react electrochemically with the electrolyte to store or release electrical energy.
  • the electrode assembly 20 includes a main body 21, a positive electrode tab 22, and a negative electrode tab 23.
  • the electrode assembly 20 is formed by winding a positive electrode sheet and a negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet.
  • the portion of the positive electrode sheet and the negative electrode sheet having active materials constitutes the main body 21 of the electrode assembly 20.
  • the rest of the positive electrode sheet constitutes the positive electrode tab 22, and the rest of the negative electrode sheet constitutes the negative electrode tab 23.
  • the main body 21 includes a first end 24, a second end 25, and two side portions 27, and the first end 24 and the second end 25 are arranged opposite to each other along the length direction (X-axis direction) of the main body 21.
  • the two side portions 27 are connected between the first end 24 and the second end 25, and the two side portions 27 are arranged opposite to each other along the width direction (Y-axis direction) of the main body 21.
  • both side portions are semi-cylindrical, and each side portion protrudes in a direction away from the other side portion.
  • the positive electrode tab 22 and the negative electrode tab 23 are jointly provided at the first end 24 of the main body 21, and the positive electrode tab 22 and the negative electrode tab 23 are arranged along the width direction (Y-axis direction) of the main body 21. In other embodiments, the positive electrode tab 22 and the negative electrode tab 23 may also be respectively disposed at the first end 24 and the second end 25 of the main body 21.
  • the electrode assembly 20 is connected to the end cap assembly 10. The first end 24 faces the end cap assembly 10, and the second end 25 faces away from the end cap assembly 10.
  • the positive electrode tab 22 is welded to the positive electrode column 11 and can be conductive; the negative electrode tab 23 is welded to the negative electrode column 12 and can be conductive.
  • the two electrode assemblies 20 are respectively a first electrode assembly 20A and a second electrode assembly 20B, and the first electrode assembly 20A and the second electrode assembly 20B are stacked along the thickness direction (Z-axis direction) of the electrode assembly 20.
  • Two recesses 26 are formed between the side portion 27 of the first electrode assembly 20A and the side portion 27 of the second electrode assembly 20B, and the recess 26 extends along the length direction (X-axis direction) of the electrode assembly 20.
  • the two recesses 26 are respectively a first recess 26A and a second recess 26B, and the first recess 26A and the second recess 26B are arranged opposite to each other along the width direction (Y-axis direction) of the electrode assembly 20.
  • the notch of the first recess 26A is away from the second recess 26B, and the opening of the second recess 26B is away from the first recess 26A.
  • the number of electrode assemblies 20 may be one or more than two, and the specific number is not limited.
  • the number of electrode assemblies 20 is more than two, multiple electrode assemblies 20 are stacked along the thickness direction of the electrode assembly 20. Multiple first recesses 26A and multiple second recesses 26B are formed between the multiple electrode assemblies 20. Multiple first recesses 26A are spaced apart along the thickness direction of the electrode assembly 20, and multiple second recesses 26B are spaced apart along the thickness direction of the electrode assembly 20. The first recess 26A and the second recess 26B are disposed opposite to each other along the width direction of the electrode assembly 20.
  • FIG. 5 is a schematic structural diagram of the partition member 30 shown in FIG. 3 .
  • the partition member 30 is generally in the shape of a rectangular frame, and is sleeved around the periphery of the electrode assembly 20 and is interference fit with the electrode assembly 20.
  • the partition member 30 is made of elastic insulating material, and in this embodiment, the partition member 30 is made of polypropylene (PP) material.
  • the partition member 30 includes a bottom plate 31, a top plate 32 and two side plates 33.
  • the top plate 32 and the bottom plate 31 are arranged relatively along the height direction (Z-axis direction) of the partition member 30, and the two side plates 33 are arranged relatively along the length direction (Y-axis direction) of the partition member 30, and are both connected between the top plate 32 and the bottom plate 31 to form a through groove 37.
  • the connection between the inner wall surface of the two side plates 33 and the inner wall surface of the top plate 32 is in an arc shape
  • the connection between the inner wall surface of the two side plates 33 and the inner wall surface of the bottom plate 31 is in an arc shape.
  • the inner wall surfaces at the four corners of the partition member 30 are all arc surfaces to fit closely to the outer peripheral surface of the electrode assembly 20.
  • the two side plates 33 are respectively a first sub-side plate 33A and a second sub-side plate 33B.
  • the partition piece 30 is provided with a through hole 34.
  • the through hole 34 is provided on the side plate 33 and penetrates the side plate 33 along the thickness direction (X-axis direction) of the partition piece 30.
  • the through hole 34 is a circular hole.
  • the shape of the through hole 34 may also be a rectangle, a triangle or a rhombus, etc., and the specific shape is not limited.
  • the ratio of the height h1 of the through hole 34 to the height h2 of the partition piece 30 is 0.05-0.1, and the ratio of the aperture d of the through hole 34 to the height h2 of the partition piece 30 is 0.03-0.05.
  • the height h1 of the through hole 34 refers to the distance between the geometric center of the through hole 34, that is, the center of the circle in the present embodiment, and the outer wall surface of the bottom plate 31; the aperture d of the through hole 34 refers to the hole diameter when the through hole 34 is a circular hole; the height h2 of the partition piece 30 refers to the distance between the outer wall surface of the top plate 32 and the outer wall surface of the bottom plate 31.
  • the number of through holes 34 is 2, and two through holes 34 are respectively disposed on the two side plates 33 and are disposed opposite to each other along the length direction of the partition member 30, so that the electrolyte flows more evenly.
  • the through hole 34 includes two groups of sub-through holes, and the two groups of sub-through holes are respectively disposed on the two side plates 33 and are disposed opposite to each other along the length direction of the partition member 30.
  • the partition member 30 is further provided with a one-way valve, which can be arranged on the hole wall of the through hole 34, or on the surface of one side along the thickness direction of the partition member 30.
  • a one-way valve which can be arranged on the hole wall of the through hole 34, or on the surface of one side along the thickness direction of the partition member 30.
  • the orthographic projection of the one-way valve completely covers the orthographic projection of the through hole 34.
  • the one-way valve is used to allow the fluid to flow in one direction.
  • the partition member 30 is further provided with a first protrusion 35 and a second protrusion 36.
  • the first protrusion 35 and the second protrusion 36 are both oriented toward the through slot 37.
  • the first protrusion 35 and the second protrusion 36 are arranged opposite to each other along the length direction of the partition member 30.
  • the first protrusion 35 includes a first contact surface 351 and a second contact surface 352 disposed opposite to the first contact surface 351. Both the first contact surface 351 and the second contact surface 352 are arc-shaped surfaces.
  • the first protrusion 35 is inserted into the first recess 26A.
  • the first contact surface 351 and the second contact surface 352 are respectively fitted with two opposite inner wall surfaces of the first recess 26A.
  • the second protrusion 36 is convexly arranged on the inner wall surface of the second sub-side plate 33B, and the second protrusion 36 includes a third contact surface 361 and a fourth contact surface 362 arranged opposite to the third contact surface 361.
  • the third contact surface 361 and the fourth contact surface 362 are both arc-shaped surfaces, one side of the third contact surface 361 is connected to the second sub-side plate 33B, the other side of the third contact surface 361 is connected to one side of the fourth contact surface 362, and the other side of the fourth contact surface 362 is connected to the second sub-side plate 33B.
  • the second protrusion 36 is inserted into the second recess 26B.
  • the third contact surface 361 and the fourth contact surface 362 are respectively fitted with two opposite inner wall surfaces of the second recess 26B.
  • the number of the first protrusion 35 and the second protrusion 36 are both one, and the first protrusion 35 and the second protrusion 36 are integrally formed with the partition member 30 to simplify the process and reduce the processing cost.
  • the first protrusion 35 and the second protrusion 36 can be multiple, and the number of the first protrusion 35 and the second protrusion 36 is the same.
  • a first protrusion 35 and a second protrusion 36 are arranged opposite to each other.
  • multiple first protrusions 35 are arranged at intervals
  • multiple second protrusions 36 are arranged at intervals.
  • Each first protrusion 35 is inserted into a first recess 26A, and each second protrusion 36 is inserted into a second recess 26B to tightly press the outer surface of the electrode assembly 20 to achieve an interference fit between the partition member 30 and the electrode assembly 20.
  • the first protrusion 35 and the second protrusion 36 both have a tip, that is, the first contact surface 351 and the second contact surface 352 are connected at a sharp angle.
  • FIG. 6 is a schematic structural diagram of the protection member 40 shown in FIG. 3 .
  • the protective member 40 is a roughly rectangular hollow body and is made of an insulating material.
  • the protective member 40 is sleeved on the outer surface of the electrode assembly 20 and connected to the end cap assembly 10.
  • the protective member 40 is used to protect the electrode assembly 20, prevent the electrode assembly 20 from being scratched by the shell 50 during the process of being placed in the shell 50, and insulate the electrode assembly 20 from the shell 50.
  • the protective member 40 is mylar, that is, a polyester film. Among them, the protective member 40 can be bonded to the side of the end cap assembly 10 facing the electrode assembly 20 by a hot melt process.
  • the protective member 40 is provided with a first accommodating cavity 41 and a first opening 42. Along the length direction (X-axis direction) of the protective member 40, the first opening 42 and the first accommodating cavity 41 are connected.
  • the first accommodating cavity 41 is used to accommodate the electrode assembly 20 and the partition member 30.
  • the protective member 40 includes a bottom wall 43, a top wall 44, a first side wall 46 and two second side walls 45.
  • the top wall 44 and the bottom wall 43 are arranged opposite to each other along the height direction (Z-axis direction) of the protective member 40.
  • the two second side walls 45 are arranged opposite to each other along the width direction (Y-axis direction) of the protective member 40, and are both connected between the top wall 44 and the bottom wall 43.
  • the first side wall 46 is arranged at one end of the length direction (X-axis direction) of the protective member 40, and is connected between the top wall 44 and the bottom wall 43, and is connected between the two second side walls 45.
  • the bottom wall 43, the top wall 44, the two second side walls 45 and the first side wall 46 are connected to form a first accommodating cavity 41, and the first opening 42 is located at one end of the length direction of the protective member 40, and is arranged opposite to the first side wall 46.
  • the two second side walls 45 are respectively a first sub-side wall 45A and a second sub-side wall 45B.
  • FIG. 7 is a schematic diagram of the structure in which the partition member 30 is fixedly connected to the protection member 40 .
  • the partition member 30 is fixedly connected to the first receiving cavity 41 of the protective member 40, the bottom plate 31 is connected and fixed to the bottom wall 43, the top plate 32 is connected and fixed to the top wall 44, the first sub-side plate 33A is connected and fixed to the first sub-side wall 45A, and the second sub-side plate 33B is connected and fixed to the second sub-side wall 45B.
  • the partition member 30 divides the first receiving cavity 41 into a first sub-receiving cavity 41A and a second sub-receiving cavity 41B.
  • the first opening 42, the first sub-receiving cavity 41A and the second sub-receiving cavity 41B are connected to the first sub-receiving cavity 41A and the second sub-receiving cavity 41B.
  • the accommodating cavity 41B is through-connected, and the through groove 37 is connected between the first sub-accommodating cavity 41A and the second sub-accommodating cavity 41B.
  • the ratio of the distance L1 between the partition piece 30 and the first side wall 46 to the length L2 of the protective piece 40 is 0.1-0.15.
  • L1 refers to the distance between the surface of the partition piece 30 facing the first side wall 46 and the outer wall surface of the first side wall 46:
  • L2 refers to the dimension of the second side wall 45 along the length direction (X-axis direction). It can be understood that the volume of the first sub-accommodating cavity 41A is much larger than the volume of the second sub-accommodating cavity 41B.
  • the partition piece 30 can be bonded to the protective piece 40, can be fixedly connected to the protective piece 40 by a hot melt process, and can be integrally formed with the protective piece 40.
  • FIG. 8 is a schematic structural diagram of the housing 50 shown in FIG. 3 .
  • the shell 50 is roughly rectangular and made of metal material.
  • the shell 50 is provided with a second accommodating cavity 51 and a second opening 52. Along the length direction of the shell 50, the second opening 52 and the second accommodating cavity 51 are connected.
  • the electrode assembly 20 and the protective member 40 are accommodated in the second accommodating cavity 51 through the second opening 52, and the end cap assembly 10 is installed in the second opening 52 and seals the shell 50.
  • the energy storage device 100 further includes a support plate 60, which is used to support the electrode assembly 20.
  • the support plate 60 is generally in the shape of a rectangular sheet and is made of an insulating material.
  • the support plate 60 is accommodated in the second accommodating cavity 51 of the shell 50, and is disposed between the first side wall 46 of the protective member 40 and the shell 50, and is fixedly connected to the first side wall 46.
  • the support plate 60 can be integrally formed with the protective member 40.
  • FIG. 9 is a partial structural perspective view of the energy storage device 100 shown in FIG. 2 .
  • the electrolyte is injected into the protective member 40 through the injection hole on the end cover assembly 10, and the electrolyte is stored in the first accommodating cavity 41 and infiltrates the electrode assembly 20.
  • the energy storage device 100 is in a lying state in the working state, and the first electrode assembly 20A and the second electrode assembly 20B are stacked in a direction perpendicular to the ground, and the second electrode assembly 20B is located on the side away from the ground.
  • the electrolyte in the energy storage device 100 reacts with the electrode assembly 20 and is continuously consumed, and its liquid level continues to drop. In addition, gas is generated when the electrolyte in the energy storage device 100 reacts with the electrode assembly 20. Because the partition 30 divides the first housing chamber 41 into the first sub-housing chamber 41A and the second sub-housing chamber 41B, and the volume of the first sub-housing chamber 41A is much larger than the volume of the second sub-housing chamber 41B, most of the electrode assembly 20 is located in the first sub-housing chamber 41A, and the gas generated by the reaction of the electrode assembly 20 with the electrolyte is also concentrated in the first sub-housing chamber 41A.
  • the large amount of gas retained in the first sub-housing chamber 41A will squeeze the electrolyte, causing the electrolyte to flow from the first sub-housing chamber 41A to the second sub-housing chamber 41B through the through hole 34 provided on the partition 30, thereby raising the liquid level in the second sub-housing chamber 41B.
  • the electrolyte is continuously consumed and gas is generated, the air pressure difference between the first sub-receiving chamber 41A and the second sub-receiving chamber 41B will gradually increase, and the electrolyte liquid level difference between the second sub-receiving chamber 41B and the first sub-receiving chamber 41A will also gradually increase.
  • the electrolyte liquid level in the first sub-receiving chamber 41A is lower than the surface of the second electrode assembly 20B facing the ground, the electrolyte liquid level in the second sub-receiving chamber 41B is still continuously higher than the surface of the second electrode assembly 20B facing the ground, so the electrolyte in the second sub-receiving chamber 41B can continuously contact the second end 25 of the second electrode assembly 20B, and is attracted by the diaphragm of the second electrode assembly 20B through capillary action and transmitted to the entire second electrode assembly 20B, so as to achieve the effect of electrolyte circulation and simultaneous infiltration of multiple electrode assemblies 20.
  • both the first protrusion 35 and the second protrusion 36 of the partition member 30 have a tip, after the electrode assembly 20 passes through the through groove 37, the tip is inserted into the recess 26 to fill the gap between the electrode assemblies, thereby ensuring better sealing between the partition member 30 and the electrode assembly 20, preventing the gas generated in the first sub-accommodating chamber 41A from flowing into the second sub-accommodating chamber 41B from the gap between the partition member 30 and the electrode assembly 20, reducing the pressure difference between the first sub-accommodating chamber 41A and the second sub-accommodating chamber 41B, and affecting the effect of the electrolyte circulating and infiltrating the multiple electrode assemblies 20.
  • the number of electrode assemblies 20 is one.
  • the electrode assembly 20 is arranged perpendicular to the ground.
  • the electrolyte in the energy storage device 100 reacts with the electrode assembly 20 and is continuously consumed, and the electrolyte level continues to drop, the portion of the electrode assembly 20 away from the ground will not be infiltrated by the electrolyte, affecting the use of the energy storage device 100.
  • the partition member 30 is provided to form the first sub-chamber 41A and the second sub-chamber 41B, and the pressure difference between the first sub-chamber 41A and the second sub-chamber 41B is utilized to maintain a higher liquid level in the second sub-chamber 41B to achieve continuous infiltration and liquid replenishment of the portion of the electrode assembly 20 away from the ground.
  • the partition member 30 is further provided with a one-way valve, and along the thickness direction of the partition member 30, the orthographic projection of the one-way valve completely covers the orthographic projection of the through hole 34.
  • the one-way valve allows the electrolyte to flow only from the first sub-accommodating chamber 41A to the second sub-accommodating chamber 41B, but not in the opposite direction, which is conducive to maintaining the liquid level difference between the first sub-accommodating chamber 41A and the second sub-accommodating chamber 41B, so as to achieve the effect of electrolyte circulation and simultaneous infiltration of multiple electrode assemblies 20.
  • the embodiment of the present application forms a first sub-chamber 41A and a second sub-chamber 41B of different sizes by setting a partition 30.
  • the air pressure difference between the first sub-chamber 41A and the second sub-chamber 41B forms a liquid level difference of the electrolyte between the two cavities.
  • the smaller second sub-chamber 41B can maintain a higher liquid level to achieve continuous infiltration and replenishment of the second electrode assembly 20B. Even if the electrolyte level is lowered, it will not affect the infiltration of the electrolyte on the electrode assembly 20 on the side away from the ground, thereby significantly improving the service life of the energy storage device 100.
  • the ratio of the height h1 of the through hole 34 to the height h2 of the partition member 30 should be less than or equal to 0.1 to avoid the through hole 34 being set too high. Because when the electrolyte level drops to the height of the through hole 34, the gas will also flow through the through hole 34, and the gas pressure difference and the electrolyte level difference between the first sub-accommodating chamber 41A and the second sub-accommodating chamber 41B will not be able to maintain, so it is impossible to achieve continuous infiltration of the second electrode assembly 20B; the ratio of the height h1 of the through hole 34 to the height h2 of the partition member 30 should be greater than or equal to 0.05 to avoid the through hole 34 being set too low close to the edge of the partition member 30, resulting in insufficient structural strength of the partition member 30 at the through hole 34.
  • the ratio of the aperture d of the through hole 34 to the height h2 of the partition member 30 should be greater than or equal to 0.03 to avoid the through hole 34 being too small and hindering the flow of electrolyte between the first sub-containing chamber 41A and the second sub-containing chamber 41B; the ratio of the aperture d of the through hole 34 to the height h2 of the partition member 30 should be less than or equal to 0.05 to avoid the through hole 34 being too large and the structural strength of the partition member 30 at the through hole 34 being insufficient.
  • the ratio of the distance L1 between the partition piece 30 and the first side wall 46 to the length L2 of the protective piece 40 should be greater than or equal to 0.1, so as to avoid the second sub-containment chamber 41B being too small and unable to store a sufficient amount of electrolyte to infiltrate the second battery cell; the ratio of the distance L1 between the partition piece 30 and the first side wall 46 to the length L2 of the protective piece 40 should be less than or equal to 0.15, so as to avoid the second sub-containment chamber 41B being too large and the first sub-containment chamber 41A being too small, so as to avoid the formation of a sufficient air pressure difference and a height difference of the electrolyte liquid level between the first sub-containment chamber 41A and the second sub-containment chamber 41B.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Secondary Cells (AREA)

Abstract

本申请公开一种储能装置、储能模组及用电设备，储能装置包括端盖组件、电极组件、隔断件、保护件和壳体，隔断件设有通槽和通孔，通槽和通孔均沿隔断件的厚度方向贯穿隔断件，且通槽和通孔间隔设置；保护件设有第一容纳腔，电极组件穿过通槽，电极组件与通槽的槽壁密封连接；隔断件与第一容纳腔的腔壁密封连接，且将第一容纳腔分隔为第一子容纳腔和第二子容纳腔，通孔连通第一子容纳腔和第二子容纳腔；壳体设有第二开口，保护件通过第二开口收容于壳体内，端盖组件安装于第二开口并密封第二开口储能装置的电解液容纳于壳体和第一容纳腔内；第一子容纳腔和第二子容纳腔之间能够产生气压差，以使第一子容纳腔内的电解液经通孔流向第二子容纳腔。

Description

储能装置、储能模组及用电设备
本申请要求于2023年06月29日提交中国专利局、申请号为202310791439.X、申请名称为“储能装置、储能模组及用电设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及储能技术领域，尤其涉及一种储能装置、储能模组及用电设备。
背景技术
基于储能装置的设计要求，有些储能装置工作时需要平躺放置。当储能装置平躺放置时，储能装置内的电极组件堆叠设置。储能装置内的电解液在经过消耗后，其液面会下降，导致位于上层的电极组件无法浸润电解液，影响储能装置的使用性能。
发明内容
本申请提供一种储能装置、储能模组及用电设备，用以解决现有技术中当储能装置平躺设置时，上层电极组件浸润不到电解液的问题。
第一方面，本申请提供一种储能装置，包括端盖组件、电极组件、隔断件、保护件和壳体，所述隔断件设有通槽和通孔，所述通槽和所述通孔均沿所述隔断件的厚度方向贯穿所述隔断件，且所述通槽和所述通孔间隔设置；所述保护件设有第一容纳腔，所述第一容纳腔具有第一开口，所述隔断件和所述电极组件均收容于所述第一容纳腔，所述电极组件穿过所述通槽，所述电极组件与所述通槽的槽壁密封连接；所述隔断件与所述第一容纳腔的腔壁密封连接，且将所述第一容纳腔分隔为第一子容纳腔和第二子容纳腔，所述第一子容纳腔与所述第一开口连通，所述通孔连通所述第一子容纳腔和所述第二子容纳腔；所述电极组件、所述隔断件和所述保护件均收容于所述壳体内，所述端盖组件安装于所述壳体的一端，所述端盖组件密封所述壳体，所述端盖组件与所述第一开口相对且连接所述保护件，所述储能装置的电解液容纳于所述壳体和所述第一容纳腔内；所述第一子容纳腔和所述第二子容纳腔之间能够产生气压差，以使所述第一子容纳腔内的电解液经所述通孔流向所述第二子容纳腔。
第二方面，本申请提供一种储能模组，包括多个储能装置，多个所述储能装置电连接。
第三方面，本申请提供一种用电设备，包括储能模组，所述储能模组用于向所述用电设备供电。
综上所述，本申请实施例通过设置隔断件形成大小不同的第一子容纳腔和第二子容纳腔，第一子容纳腔和第二子容纳腔之间的气压差在两个腔体之间形成电解液的液面高度差，较小的第二子容纳腔能够维持较高的液面以实现对第二电极组件的持续浸润和补液，即使电解液液面降低也不会影响电解液对远离底面一侧卷芯的浸润情况，显著提升了储能装置的使用寿命。
附图说明
为了更清楚地说明本申请的技术方案，下面将对实施方式中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施方式，对于本领域普通技术 人员来讲，在不付出创造性劳动的前提下，还可以如这些附图获得其他的附图。
图1为本申请实施例提供的户用储能系统的应用场景图；
图2为本申请实施例提供的储能装置的结构示意图；
图3为图2所示的储能装置的结构分解图；
图4为图3所示的电极组件的结构示意图；
图5为图3所示的隔断件的结构示意图；
图6为图3所示的保护件的结构示意图；
图7为隔断件固定连接于保护件内的结构示意图；
图8为图3所示的壳体的结构示意图；
图9为图2所示的储能装置的部分结构透视图。
附图标记：户用储能系统1000；储能装置100；电能转换装置200；用户负载300；端盖组件10；电极组件20；隔断件30；保护件40；壳体50；正极极柱11；负极极柱12；防爆阀13；主体21；正极极耳22；负极极耳23；第一端24；第二端25；侧部27；第一电极组件20A；第二电极组件20B；凹部26；第一凹部26A；第二凹部26B；底板31；顶板32；侧板33；通槽37；第一子侧板33A；第二子侧板33B；通孔34；第一凸起35；第一接触面351；第二接触面352；第二凸起36；第三接触面361；第四接触面362；第一容纳腔41；第一开口42；底壁43；顶壁44；第一侧壁46；第二侧壁45；第一子侧壁45A；第二子侧壁45B；第二容纳腔51；第二开口52；托板60；第一子容纳腔41A；第二子容纳腔41B。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
由于人们所需要的能源都具有很强的时间性和空间性，为了合理利用能源并提高能量的利用率，需要通过一种介质或者设备，把一种能量形式用同一种或者转换成另外一种能量形式存储起来，基于未来应用需要再以特定能量形式释放出来。众所周知，要实现碳中和的大目标，目前绿色电能的产生主要途径是发展光伏、风电等绿色能源来替代化石能源。
目前绿色电能的产生普遍依赖于光伏、风电、水势等，而风能和太阳能等普遍存在间歇性强、波动性大的问题，会造成电网不稳定，用电高峰电不够，用电低谷电太多，不稳定的电压还会对电力造成损害，因此可能因为用电需求不足或电网接纳能力不足，引发“弃风弃光”问题，要解决这些问题须依赖储能。即将电能通过物理或者化学的手段转化为其他形式的能量存储起来，在需要的时候将能量转化为电能释放出来。简单来说，储能就类似一个大型“充电宝”，在光伏、风能充足时，将电能储存起来，在需要时释放储能的电力。
请参阅图1，图1是本申请实施例提供的户用储能系统1000的应用场景图。
以用户侧储能中的家用储能场景为例进行说明，图1示出了一种户用储能系统，该户用储能系统包括储能装置100和电能转换装置200(比如光伏板)，以及用户负载300(比如路灯、家用电器等)，储能装置100为一小型储能箱，可通过壁挂方式安装于室外墙壁。具体的，电能转换装置200可以在电价低谷时期将太阳能转换为电能，并通过储能装置100进行存储，进而在电价高峰时供给用户负载300进行使用，或者在电网断电/停电时供给用户负载300进行使用。
而结合上述所述的通过物理或者电化学的手段进行能量存储的情况，以电化学储能为例，储能装置100包括至少一组化学电池，利用化学电池内的化学元素做储能介质，以通过储能介质的化学反应或者变化实现充放电的过程。简单来说就是把光能、风能产生的电能通过储能介质的化学反应或者变化存在至少一组化学电池中，在外部电能的使用达到高峰时再通过储能介质的化学反应或者变化将至少一组化学电池存储的电量释放出来使用，或者转移给电量紧缺的地方再使用。
请参阅图2，图2为本申请实施例提供的储能装置100的结构示意图。
本申请提供一种储能装置100、包括多个储能装置100的储能模组(图未示)和使用储能模组的用电设备(图未示)。本实施例中，储能装置100以电池为例进行说明。当该储能装置100为单体电池时，其可为方形电池。储能模组可包括但并不限于电池模组、电池包、电池系统等。用电设备可以包括但不限于应用在电网侧储能场景的大型储能集装箱、应用在用户侧的工商业储能场景(银行、商场等)的中小型储能电柜以及应用在用户侧的家庭储能场景的户用小型储能箱等。
为方便描述，定义图2所示储能装置100的长度方向为X轴方向，储能装置100的宽度方向为Y轴方向，储能装置100的厚度方向为Z轴方向，X轴方向、Y轴方向和Z轴方向两两相互垂直。需要说明的是，本申请所述的相同是允许存在一定范围内的公差。本申请实施例描述所提及的“上”、“下”、“内”和“外”等方位用词是依据说明书附图2所示方位进行的描述，以朝向Z轴正方向为“上”，以朝向Z轴负方向为“下”，以朝向储能装置100内部为“内”，以朝向储能装置100外部为“外”，其并不形成对储能装置100于实际应用场景中的限定。
请一并参阅图3，图3为图2所示的储能装置100的结构分解图。
储能装置100包括端盖组件10、电极组件20、隔断件30、保护件40和壳体50。电极组件20的一端与端盖组件10连接，隔断件30固定连接于保护件40内，保护件40和隔断件30均套设于电极组件20周缘，电极组件20、隔断件30和保护件40均收容于壳体50内，端盖组件10安装于壳体50的一端并密封壳体50。
如图2所示，端盖组件10包括正极极柱11、负极极柱12和防爆阀13。本实施例中，沿端盖组件10的长度方向(Y轴方向)，正极极柱11和负极极柱12分别位于端盖组件10的相对两端且间隔设置。正极极柱11和负极极柱12均由金属材料制成，正极极柱11用作储能装置100外接其他设备时的正极端，负极极柱12用作储能装置100外接其他设备时的负极端。防爆阀13位于正极极柱11和负极极柱12之间，且与正极极柱11和负极极柱12间隔设置。防爆阀13在储能装置100内部的压力过大时，能够自动打开泄压，以防止储能装置100爆炸。
请一并参阅图4，图4为图3所示的电极组件20的结构示意图。
电极组件20大致呈板状，用以与电解液发生电化学反应以储存或释放电能。电极组件20包括主体21、正极极耳22和负极极耳23。电极组件20由正极片和负极片卷绕形成，并且通常在正极片与负极片之间设有隔膜。正极片和负极片中具有活性物质的部分构成电极组件20的主体21。正极片的其余部分构成正极极耳22，负极片的其余部分构成负极极耳23。主体21包括第一端24、第二端25和两个侧部27，第一端24和第二端25沿主体21的长度方向(X轴方向)相背设置。两个侧部27连接于第一端24和第二端25之间，且两个侧部27沿主体21的宽度方向(Y轴方向)相背设置。本实施例中，两个侧部均呈半圆柱状，且每一个侧部沿远离另一个侧部的方向凸出。本申请实施例中，正极极耳22和负极极耳23共同设于主体21的第一端24，且正极极耳22和负极极耳23沿主体21的宽度方向(Y轴方向) 相对且间隔设置。在其他实施例中，正极极耳22和负极极耳23也可以分别设于主体21的第一端24和第二端25。电极组件20与端盖组件10连接。第一端24朝向端盖组件10，第二端25背离端盖组件10。正极极耳22与正极极柱11焊接并能够导通；负极极耳23与负极极柱12焊接并能够导通。
如图3所示，本实施例中，电极组件20数量为二，两个电极组件20分别为第一电极组件20A和第二电极组件20B，第一电极组件20A和第二电极组件20B沿电极组件20的厚度方向(Z轴方向)层叠设置。第一电极组件20A的侧部27和第二电极组件20B的侧部27之间形成两个凹部26，凹部26沿电极组件20的长度方向(X轴方向)延伸。两个凹部26分别为第一凹部26A和第二凹部26B，第一凹部26A和第二凹部26B沿电极组件20的宽度方向(Y轴方向)相背设置。第一凹部26A的槽口背离第二凹部26B，第二凹部26B的开口背离第一凹部26A。
在其他实施例中，电极组件20的数量可以为一，也可以大于二，具体数量不做限制。当电极组件20数量大于二时，多个电极组件20沿电极组件20的厚度方向层叠设置。多个电极组件20之间形成多个第一凹部26A和多个第二凹部26B。多个第一凹部26A沿电极组件20的厚度方向间隔设置，多个第二凹部26B沿电极组件20的厚度方向间隔设置。第一凹部26A和第二凹部26B沿电极组件20的宽度方向相背设置。
请参阅图5，图5为图3所示的隔断件30的结构示意图。
隔断件30大致呈矩形框体，隔断件30套设于电极组件20的周缘，且与电极组件20过盈配合。隔断件30由弹性绝缘材料制成，本实施例中，隔断件30由聚丙烯(polypropylene，PP)材料制成。
隔断件30包括底板31、顶板32和两个侧板33。顶板32和底板31沿着隔断件30的高度方向(Z轴方向)相对设置，两个侧板33沿着隔断件30的长度方向(Y轴方向)相对设置，且均连接于顶板32和底板31之间，围成通槽37。两个侧板33的内壁面与顶板32的内壁面的连接处呈圆弧状，两个侧板33的内壁面与底板31的内壁面的连接处呈圆弧状。可以理解，隔断件30四角连接处的内壁面均为圆弧面，以紧密贴合电极组件20的外周面。两个侧板33分别为第一子侧板33A和第二子侧板33B。
隔断件30设有通孔34。通孔34设于侧板33，且沿隔断件30的厚度方向(X轴方向)贯穿侧板33。本实施例中，通孔34为圆形孔。在其他实施例中，通孔34的形状还可以是矩形、三角形或者菱形等，具体形状不做限制。通孔34的高度h1与隔断件30的高度h2的比值为0.05-0.1，通孔34的孔径d与隔断件30的高度h2的比值为0.03-0.05。具体的，通孔34的高度h1是指通孔34的几何中心，本实施例中即圆心，至底板31的外壁面之间的距离；通孔34的孔径d是指通孔34为圆形孔时的孔直径；隔断件30的高度h2是指顶板32的外壁面到底板31的外壁面之间的距离。本实施例中，通孔34的数量为2，两个通孔34分别设置于两个侧板33，且沿隔断件30的长度方向相对设置，以使电解液流动更加均匀。在其他实施例中，通孔34包括两组子通孔，两组子通孔分别设置于两个侧板33，且沿隔断件30的长度方向相对设置。
一种实施例中，隔断件30还设有单向阀，单向阀可以设置于通孔34的孔壁，也可以设置于隔断件30沿厚度方向一侧的表面。沿隔断件30的厚度方向，单向阀的正投影完全覆盖通孔34的正投影。单向阀用于使流体单方向流动。
隔断件30还设有第一凸起35和第二凸起36。第一凸起35和第二凸起36均朝向通槽37内，沿隔断件30的长度方向，第一凸起35和第二凸起36相对设置。第一凸起35凸设于第 一子侧板33A的内壁面，第一凸起35包括第一接触面351和与第一接触面351背向设置的第二接触面352，第一接触面351和第二接触面352均为弧形面，第一接触面351的一侧连接第一子侧板33A，第一接触面351的另一侧连接第二接触面352的一侧，第二接触面352的另一侧连接第一子侧板33A。第一凸起35插入第一凹部26A内。第一接触面351和第二接触面352分别与第一凹部26A的两个相对的内壁面贴合。第二凸起36凸设于第二子侧板33B的内壁面，第二凸起36包括第三接触面361和与第三接触面361背向设置的第四接触面362，第三接触面361和第四接触面362均为弧形面，第三接触面361的一侧连接第二子侧板33B，第三接触面361的另一侧连接第四接触面362的一侧，第四接触面362的另一侧连接第二子侧板33B。第二凸起36插入第二凹部26B内。第三接触面361和第四接触面362分别与第二凹部26B的两个相对的内壁面贴合。
本实施例中，第一凸起35和第二凸起36的数量均为一，且第一凸起35和第二凸起36与隔断件30为一体成型件，以简化工艺、降低加工成本。在其他实施例中，第一凸起35和第二凸起36可以为多个，且第一凸起35和第二凸起36的数量相同。沿隔断件30的长度方向，一个第一凸起35和一个第二凸起36相对设置。沿隔断件30的宽度方向，多个第一凸起35间隔设置，多个第二凸起36间隔设置。每一个第一凸起35插入一个第一凹部26A内，每一个第二凸起36插入一个第二凹部26B内，以紧密压接电极组件20的外表面，实现隔断件30与电极组件20的过盈配合。
一种实施例中，第一凸起35和第二凸起36均具有尖部，即第一接触面351和第二接触面352连接处为尖角。在隔断件30套设于电极组件20的周缘时，尖部插入凹部26并封闭电极组件20之间的缝隙，实现隔断件30与电极组件20之间的更好的密封性。
请参阅图6，图6为图3所示的保护件40的结构示意图。
保护件40大致呈矩形中空体，且由绝缘材料制成。保护件40套设于电极组件20的外表面，并与端盖组件10连接。保护件40用以保护电极组件20，防止电极组件20在放入壳体50过程中被壳体50刮伤，同时将电极组件20与壳体50绝缘。本实施例中，保护件40为麦拉膜(mylar)，即一种聚酯薄膜。其中，保护件40可通过热熔工艺粘接于端盖组件10朝向电极组件20的一侧。
保护件40设有第一容纳腔41和第一开口42。沿保护件40的长度方向(X轴方向)，第一开口42和第一容纳腔41贯通。第一容纳腔41用于容纳电极组件20和隔断件30。保护件40套设于电极组件20时，电极组件20通过第一开口42进入第一容纳腔41。
保护件40包括底壁43、顶壁44、第一侧壁46和两个第二侧壁45。顶壁44和底壁43沿着保护件40的高度方向(Z轴方向)相对设置。两个第二侧壁45沿着保护件40的宽度方向(Y轴方向)相对设置，且均连接于顶壁44和底壁43之间。第一侧壁46设置于保护件40的长度方向(X轴方向)的一端，且连接于顶壁44和底壁43之间，并连接于两个第二侧壁45之间。底壁43、顶壁44、两个第二侧壁45和第一侧壁46连接围成第一容纳腔41，第一开口42位于保护件40长度方向的一端，与第一侧壁46相背设置。两个第二侧壁45分别为第一子侧壁45A和第二子侧壁45B。
请一并参阅图5至图7，图7为隔断件30固定连接于保护件40内的结构示意图。
保护件40的第一容纳腔41内固定连接有隔断件30，底板31与底壁43连接并固定，顶板32与顶壁44连接并固定，第一子侧板33A与第一子侧壁45A连接并固定，第二子侧板33B与第二子侧壁45B连接并固定。隔断件30将第一容纳腔41分隔为第一子容纳腔41A和第二子容纳腔41B。在保护件40的长度方向上，第一开口42、第一子容纳腔41A和第二子 容纳腔41B贯通，通槽37连接于第一子容纳腔41A和第二子容纳腔41B之间。隔断件30距第一侧壁46的距离L1与保护件40长度L2的比值为0.1-0.15。其中，L1是指，隔断件30朝向第一侧壁46的表面至第一侧壁46的外壁面之间的距离：L2是指，第二侧壁45沿长度方向(X轴方向)的尺寸。可以理解，第一子容纳腔41A的体积远大于第二子容纳腔41B的体积。其中，隔断件30可以粘接于保护件40内，也可以通过热熔工艺与保护件40固定连接，还可以与保护件40一体成型。
请参阅图8，图8为图3所示的壳体50的结构示意图。
壳体50大致呈矩形，且由金属材料制成。壳体50设有第二容纳腔51和第二开口52。沿壳体50的长度方向，第二开口52和第二容纳腔51贯通。电极组件20及保护件40通过第二开口52容置于第二容纳腔51内，端盖组件10安装于第二开口52并密封壳体50。
请继续参阅图3，本实施例中，储能装置100还包括托板60，托板60用于支撑电极组件20。托板60大致呈矩形片状，且由绝缘材料制成。托板60收容于壳体50的第二容纳腔51内，且设置于保护件40的第一侧壁46与壳体50之间，并固定连接于第一侧壁46。一些实施例中，托板60可以与保护件40一体成型。
请参阅图9，图9为图2所示的储能装置100的部分结构透视图。
在储能装置100完成组装后，通过端盖组件10上的注液孔向保护件40内注射电解液，电解液储存于第一容纳腔41内并浸润电极组件20。本实施例中，储能装置100工作状态下处于平躺状态，第一电极组件20A和第二电极组件20B沿垂直于地面方向层叠设置，且第二电极组件20B位于背离地面一侧。
工作状态下，储能装置100内的电解液与电极组件20反应被持续消耗，其液面也持续下降。另外，储能装置100内的电解液与电极组件20反应时会产生气体。因为隔断件30将第一容纳腔41分隔为第一子容纳腔41A和第二子容纳腔41B，且第一子容纳腔41A的体积远大于第二子容纳腔41B的体积，所以电极组件20大部分位于第一子容纳腔41A内，电极组件20与电解液反应产生的气体也大量集中于第一子容纳腔41A内。第一子容纳腔41A内滞存的大量气体将挤压电解液，促使电解液通过隔断件30上设置的通孔34从第一子容纳腔41A流向第二子容纳腔41B，进而抬高第二子容纳腔41B内的液面。随着储能装置100的持续工作，持续消耗电解液并产生气体，第一子容纳腔41A和第二子容纳腔41B之间的气压差会逐渐增大，而第二子容纳腔41B和第一子容纳腔41A之间电解液的液面高度差也会逐渐增加。因此，当第一子容纳腔41A内电解液的液面低于第二电极组件20B朝向地面的表面时，第二子容纳腔41B内的电解液液面仍持续高于第二电极组件20B朝向地面的表面，因此第二子容纳腔41B内的电解液能够持续接触第二电极组件20B的第二端25，并被第二电极组件20B的隔膜通过毛细作用吸引且传送至整个第二电极组件20B，以达到电解液循环，同时浸润多个电极组件20的效果。
本实施例中，由于隔断件30的第一凸起35和第二凸起36均具有尖部。在电极组件20穿过通槽37后，尖部插入凹部26能够填充电极组件之间的缝隙，从而保证隔断件30与电极组件20之间更好的密封性，防止第一子容纳腔41A内产生的气体从隔断件30与电极组件20之间的缝隙流入第二子容纳腔41B内，降低第一子容纳腔41A和第二子容纳腔41B之间的气压差，影响电解液循环浸润多个电极组件20的效果。
一种实施例中，电极组件20的数量为一。储能装置100处于平躺状态时，电极组件20垂直于地面方向设置。当储能装置100内的电解液与电极组件20反应被持续消耗，电解液液面持续下降时，电极组件20远离地面的部分将无法被电解液浸润，影响储能装置100的使用 寿命。通过设置隔断件30形成第一子容纳腔41A和第二子容纳腔41B，利用第一子容纳腔41A和第二子容纳腔41B之间的气压差，在第二子容纳腔41B内维持较高的液面以实现对电极组件20远离地面的部分的持续浸润和补液。
一种实施例中，隔断件30还设有单向阀，沿隔断件30的厚度方向，单向阀的正投影完全覆盖通孔34的正投影。单向阀使得电解液只能从第一子容纳腔41A流向第二子容纳腔41B，而不能反方向流动，有利于维持第一子容纳腔41A和第二子容纳腔41B之间的液面差，以达到电解液循环，同时浸润多个电极组件20的效果。
综上所述，本申请实施例通过设置隔断件30形成大小不同的第一子容纳腔41A和第二子容纳腔41B，第一子容纳腔41A和第二子容纳腔41B之间的气压差在两个腔体之间形成电解液的液面高度差，较小的第二子容纳腔41B能够维持较高的液面以实现对第二电极组件20B的持续浸润和补液，即使电解液液面降低也不会影响电解液对远离地面一侧电极组件20的浸润情况，显著提升了储能装置100的使用寿命。
如图5所示，本申请实施例中，通孔34的高度h1与隔断件30的高度h2的应当比值小于等于0.1，避免通孔34设置过高。因为当电解液液面降至通孔34高度时，气体也将通过通孔34流通，第一子容纳腔41A和第二子容纳腔41B之间将无法维持气压差及电解液的液面差，故无法实现对第二电极组件20B的持续浸润；通孔34的高度h1与隔断件30的高度h2的应当比值大于等于0.05，避免通孔34设置过低靠近隔断件30边沿，导致通孔34处的隔断件30结构强度不足。
本申请实施例中，通孔34的孔径d与隔断件30的高度h2的比值应当大于等于0.03，避免通孔34过小，阻碍电解液在第一子容纳腔41A和第二子容纳腔41B之间的流动；通孔34的孔径d与隔断件30的高度h2的比值应当小于等于0.05，避免通孔34过大，通孔34处隔断件30的结构强度不足。
如图7所示，本申请实施例中，隔断件30距第一侧壁46的距离L1与保护件40长度L2的比值应当大于等于0.1，避免第二子容纳腔41B体积过小，无法储存足够量的电解液以浸润第二电芯；隔断件30距第一侧壁46的距离L1与保护件40长度L2的比值应当小于等于0.15，避免第二子容纳腔41B体积过大而第一子容纳腔41A的体积过小，无法在第一子容纳腔41A和第二子容纳腔41B之间形成足够的气压差以及电解液液面的高度差。
以上对本申请实施例进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的方法及其核心思想；同时，对于本领域的一般技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。

Claims (11)

  1. 一种储能装置(100)，其特征在于，包括端盖组件(10)、电极组件(20)、隔断件(30)、保护件(40)和壳体(50)，
    所述隔断件(30)设有通槽(37)和通孔(34)，所述通槽(37)和所述通孔(34)均沿所述隔断件(30)的厚度方向贯穿所述隔断件(30)，且所述通槽(37)和所述通孔(34)间隔设置；
    所述保护件(40)设有第一容纳腔(41)，所述第一容纳腔(41)具有第一开口(42)，所述隔断件(30)和所述电极组件(20)均收容于所述第一容纳腔(41)，所述电极组件(20)穿过所述通槽(37)，所述电极组件(20)与所述通槽(37)的槽壁密封连接；所述隔断件(30)与所述第一容纳腔(41)的腔壁密封连接，且将所述第一容纳腔(41)分隔为第一子容纳腔(41A)和第二子容纳腔(41B)，所述第一子容纳腔(41A)与所述第一开口(42)连通，所述通孔(34)连通所述第一子容纳腔(41A)和所述第二子容纳腔(41B)；
    所述壳体(50)设有第二开口(52)，所述保护件(40)通过所述第二开口(52)收容于所述壳体(50)内，所述端盖组件(10)安装于所述第二开口(52)并密封所述第二开口(52)，所述端盖组件(10)与所述第一开口(42)相对且所述端盖组件(10)连接所述保护件(40)，所述储能装置(100)的电解液容纳于所述壳体(50)和所述第一容纳腔(41)内；
    所述第一子容纳腔(41A)和所述第二子容纳腔(41B)之间能够产生气压差，以使所述第一子容纳腔(41A)内的电解液经所述通孔(34)流向所述第二子容纳腔(41B)。
  2. 根据权利要求1所述的储能装置(100)，其特征在于，所述通孔(34)的高度h1与所述隔断件(30)的高度h2的比值为0.05-0.1。
  3. 根据权利要求1所述的储能装置(100)，其特征在于，所述保护件(40)包括第一侧壁(46)，所述第一侧壁(46)设置于远离所述端盖组件(10)的一端，所述隔断件(30)距所述第一侧壁(46)的距离L1与所述保护件(40)的长度L2的比值为0.1-0.15。
  4. 根据权利要求1所述的储能装置(100)，其特征在于，所述通孔(34)为圆形孔，所述通孔(34)的孔径d与所述隔断件(30)的高度h2的比值为0.03-0.05。
  5. 根据权利要求1所述的储能装置(100)，其特征在于，所述隔断件(30)包括两个侧板(33)，两个所述侧板(33)沿所述隔断件(30)的长度方向相对设置，所述通孔(34)包括两组子通孔，两组所述子通孔分别贯穿两个所述侧板(33)，且两组所述子通孔沿所述隔断件(30)的长度方向相对设置。
  6. 根据权利要求1-4任一项所述的储能装置(100)，其特征在于，所述隔断件(30)包括两个侧板(33)，两个所述侧板(33)沿所述隔断件(30)的长度方向相对设置；所述隔断件(30)设有第一凸起(35)和第二凸起(36)，所述第一凸起(35)和所述第二凸起(36)分别凸设于两个所述侧板(33)，且均朝向所述通槽(37)凸出，沿所述隔断件(30)的长度方向，所述第一凸起(35)和所述第二凸起(36)相对设置；
    所述电极组件(20)有两个，两个所述电极组件(20)沿所述电极组件(20)的厚度方 向层叠设置，两个所述电极组件(20)之间形成第一凹部(26A)和第二凹部(26B)，所述第一凹部(26A)和所述第二凹部(26B)沿所述电极组件(20)的宽度方向相背设置；
    所述第一凸起(35)插入所述第一凹部(26A)内，且封闭所述电极组件(20)之间的缝隙，所述第一凸起(35)的表面压接所述第一凹部(26A)的内壁面；
    所述第二凸起(36)插入所述第二凹部(26B)内，且封闭所述电极组件(20)之间的缝隙，所述第二凸起(36)的表面压接所述第二凹部(26B)的内壁面。
  7. 根据权利要求6所述的储能装置(100)，其特征在于，所述第一凸起(35)和所述第二凸起(36)均与所述侧板(33)一体成型。
  8. 根据权利要求1-4任一项所述的储能装置(100)，其特征在于，所述隔断件(30)与所述保护件(40)一体成型。
  9. 根据权利要求1所述的储能装置(100)，其特征在于，所述隔断件(30)还设有单向阀，沿所述隔断件(30)的厚度方向，所述单向阀的正投影完全覆盖所述通孔(34)的正投影；所述单向阀仅允许流体从所述第一子容纳腔(41A)流向所述第二子容纳腔(41B)。
  10. 一种储能模组，其特征在于，包括多个如权利要求1-9所述的储能装置(100)，多个所述储能装置(100)电连接。
  11. 一种用电设备，其特征在于，包括如权利要求10所述的储能模组，所述储能模组用于向所述用电设备供电。
PCT/CN2024/076292 2023-06-29 2024-02-06 储能装置、储能模组及用电设备 WO2025001166A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202310791439.X 2023-06-29
CN202310791439.XA CN116706439A (zh) 2023-06-29 2023-06-29 储能装置、储能模组及用电设备

Publications (1)

Publication Number Publication Date
WO2025001166A1 true WO2025001166A1 (zh) 2025-01-02

Family

ID=87837347

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2024/076292 WO2025001166A1 (zh) 2023-06-29 2024-02-06 储能装置、储能模组及用电设备

Country Status (4)

Country Link
US (1) US20250007135A1 (zh)
EP (1) EP4485632A1 (zh)
CN (1) CN116706439A (zh)
WO (1) WO2025001166A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116706439A (zh) * 2023-06-29 2023-09-05 厦门海辰储能科技股份有限公司 储能装置、储能模组及用电设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011054539A (ja) * 2009-09-04 2011-03-17 Toyota Motor Corp 電池の製造方法
US20150357670A1 (en) * 2014-06-09 2015-12-10 Gs Yuasa International Ltd. Energy storage device and method of manufacturing energy storage device
CN112542605A (zh) * 2020-12-24 2021-03-23 深圳新源柔性科技有限公司 一种柔性贮备电池
CN114824681A (zh) * 2022-06-27 2022-07-29 宁德新能源科技有限公司 电化学装置及电子装置
CN116706439A (zh) * 2023-06-29 2023-09-05 厦门海辰储能科技股份有限公司 储能装置、储能模组及用电设备

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107394063B (zh) * 2016-05-16 2023-06-06 宁德时代新能源科技股份有限公司 二次电池

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011054539A (ja) * 2009-09-04 2011-03-17 Toyota Motor Corp 電池の製造方法
US20150357670A1 (en) * 2014-06-09 2015-12-10 Gs Yuasa International Ltd. Energy storage device and method of manufacturing energy storage device
CN112542605A (zh) * 2020-12-24 2021-03-23 深圳新源柔性科技有限公司 一种柔性贮备电池
CN114824681A (zh) * 2022-06-27 2022-07-29 宁德新能源科技有限公司 电化学装置及电子装置
CN116706439A (zh) * 2023-06-29 2023-09-05 厦门海辰储能科技股份有限公司 储能装置、储能模组及用电设备

Also Published As

Publication number Publication date
US20250007135A1 (en) 2025-01-02
CN116706439A (zh) 2023-09-05
EP4485632A1 (en) 2025-01-01

Similar Documents

Publication Publication Date Title
CN117199742B (zh) 端盖组件、储能装置及用电设备
CN116207432B (zh) 端盖组件、储能装置及用电设备
CN117059979B (zh) 端盖组件、储能装置及用电设备
CN116190673A (zh) 端盖组件、储能装置、用电设备及户用储能系统
WO2024198623A1 (zh) 端盖组件和储能装置
WO2024222078A1 (zh) 端盖组件、储能装置和用电设备
CN116365125B (zh) 端盖组件、储能装置以及用电设备
WO2025001166A1 (zh) 储能装置、储能模组及用电设备
CN117117403A (zh) 端盖组件、储能装置和用电设备
WO2024222074A1 (zh) 储能装置和用电设备
WO2024222065A1 (zh) 端盖组件、储能装置以及用电设备
CN116845444B (zh) 端盖组件、储能装置及用电设备
US20250007136A1 (en) Energy-storage device and electricity-consumption apparatus
CN119231044B (zh) 储能装置及用电设备
CN116365188B (zh) 转接组件、储能装置和用电设备
CN222953222U (zh) 端盖组件、储能装置及用电设备
CN222980732U (zh) 储能装置及用电设备
CN119208858B (zh) 储能装置及用电设备
CN117855709B (zh) 端盖组件、储能装置及用电设备
CN222775404U (zh) 端盖组件、储能装置及用电设备
CN222883679U (zh) 端盖组件、储能装置及用电设备
CN222233746U (zh) 储能装置及用电设备
CN222851534U (zh) 端盖组件、储能装置及用电设备
CN116799391B (zh) 下塑胶、储能装置及用电设备
CN120221907A (zh) 储能装置及用电设备

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 24829825

Country of ref document: EP

Kind code of ref document: A1