WO2021135165A1 - Energy storage device and method for assembling energy storage device - Google Patents

Energy storage device and method for assembling energy storage device Download PDF

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Publication number
WO2021135165A1
WO2021135165A1 PCT/CN2020/102570 CN2020102570W WO2021135165A1 WO 2021135165 A1 WO2021135165 A1 WO 2021135165A1 CN 2020102570 W CN2020102570 W CN 2020102570W WO 2021135165 A1 WO2021135165 A1 WO 2021135165A1
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WO
WIPO (PCT)
Prior art keywords
energy storage
storage device
electrical connection
conversion element
housing
Prior art date
Application number
PCT/CN2020/102570
Other languages
French (fr)
Chinese (zh)
Inventor
童焰
陈志勇
Original Assignee
广东微电新能源有限公司
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Filing date
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Publication of WO2021135165A1 publication Critical patent/WO2021135165A1/en

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    • 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
    • H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
    • H01G2/10—Housing; Encapsulation
    • H01G2/103—Sealings, e.g. for lead-in wires; Covers
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/52—Removing gases inside the secondary cell, e.g. by absorption
    • 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
    • H01M50/183—Sealing members
    • 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
    • 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 invention relates to the technical field of energy storage devices, and more specifically, the present invention relates to an energy storage device and an assembly method of the energy storage device.
  • the energy storage device includes, for example, a battery, a capacitor, and the like.
  • a battery which is powered by the battery, so as to realize the normal use of the electronic device.
  • the battery used in the electronic product may be, for example, a steel shell battery or a soft pack battery.
  • the existing soft-pack battery usually includes a winding core and two half-shells that are snapped together, and the winding core is assembled into a space surrounded by the two half-shells.
  • the two tabs of the winding core protrude from the edges of the two half shells for electrical connection, which leads to the problem that the battery is more difficult to seal and bend, and it is easy to cause damage to the packaging film and cause liquid leakage. . It may even affect the overall sealing of the battery, resulting in performance degradation such as waterproof and dustproof. If the bare cell in the soft-pack button battery has a winding structure and the lead angle of the tab is unstable, it is more difficult to bend the edges and to realize automated production. After the tabs are bent, heat sealing is performed, which increases the difficulty of sealing, and may also affect the battery space utilization rate and reduce the battery energy density.
  • the steel shell battery Although the assembly process of the steel shell battery is relatively simple, its safety performance is poor. Moreover, the steel shell also has the disadvantages of high weight, small distance between the positive electrode and the negative electrode, and easy short-circuiting.
  • An object of the present invention is to provide a new technical solution for an energy storage device and an assembling method of the energy storage device.
  • an energy storage device including:
  • An energy conversion element having at least one electrical connection portion provided on the surface thereof;
  • a housing the housing includes a conductor layer and at least one insulating layer compounded together, a cavity is formed inside the housing, at least one of the insulating layers is located on one side of the cavity, and is located on the side of the cavity.
  • a hollow structure is provided on the insulating layer, the conductor layer is exposed on the hollow structure to form a contact portion, and the electrical connection portion is connected to the contact portion;
  • the housing includes a first half-shell and a second half-shell that are hermetically connected together, and at least one of the first half-shell and the second half-shell includes a recessed structure and is surrounded by a recessed structure. An edge portion formed by the edge of the structure extending outward; the hollow structure is provided on the recessed structure.
  • the edge portions are welded together by heat melting or ultrasonic.
  • the hollow structure is formed by removing material.
  • the upper and lower sides are folded, and the edge portion is folded toward the side wall of the housing.
  • the material of the insulating layer is plastic.
  • the conductor layer includes an inner surface on one side of the cavity and an outer surface opposite to the inner surface.
  • the insulating layer is compounded on both the inner surface and the outer surface. Corresponding positions of the insulating layer all form the hollow structure.
  • the energy conversion element includes an energy conversion element body and the electrical connection part mechanically connected to the energy storage element body, or the electrical connection part is a part of the energy storage element body extending on its surface .
  • the energy conversion element is a wound bare cell or a laminated bare cell.
  • the electrical connection part is welded to the inner surface of the contact part
  • the welding spot or welding pass passes through the contact part from the outside of the housing;
  • solder joints or weld beads gradually spread to the surroundings from the contact surface of the contact portion and the electrical connection portion.
  • the energy storage device is a soft pack battery.
  • an assembling method of an energy storage device comprising:
  • An energy conversion element having at least one electrical connection portion provided on the surface thereof;
  • a housing the housing includes a conductor layer and at least one insulating layer compounded together, a cavity is formed inside the housing, at least one of the insulating layers is located on one side of the cavity, and is located on the side of the cavity.
  • a hollow structure is provided on the insulating layer, and the conductor layer is exposed on the hollow structure to form a contact portion;
  • the assembly method includes:
  • the shell is closed.
  • the electrical connection part is separated from the contact part.
  • the energy storage device there is no need to extend the electrical connection part from the edges of the two half-shells, so that the two half-shells can form a good sealed connection.
  • the conductor layer of the shell is exposed from the hollow structure, so that the internal energy conversion element can be directly electrically connected to the outside through the conductor layer of the shell, which simplifies the structure of the energy storage device , To avoid the problem that the battery edge is more difficult to bend and bend due to the lead out of the electrical connection part.
  • the steel shell battery welding technology can be used, and the battery shell can take into account the characteristics of the soft pack battery shell, and the battery has a significant improvement in safety and assembly process.
  • the technical task to be achieved or the technical problem to be solved by the present invention is never thought of or unexpected by those skilled in the art, so the present invention is a new technical solution.
  • Fig. 1 is a perspective view of an energy storage device provided according to an embodiment of the present disclosure.
  • Fig. 2 is a side view of Fig. 1.
  • Fig. 3 is a perspective view of an energy storage device provided according to another embodiment of the present disclosure.
  • Fig. 4 is a top view of Fig. 3.
  • Fig. 5 is a structural exploded view of an energy storage device provided according to an embodiment of the present disclosure.
  • Fig. 6 is a side view of Fig. 5.
  • Fig. 7 is a schematic structural diagram of an energy storage device provided according to an embodiment of the present disclosure.
  • Fig. 8 is a cross-sectional view of an energy storage device provided according to an embodiment of the present disclosure.
  • an energy storage device may be, for example, a battery or a capacitor.
  • the energy storage device may be a soft pack battery, or of course, it may also be a steel shell battery.
  • the battery may be a primary battery or a secondary battery.
  • the energy storage device provided by the embodiment of the present invention can be applied to a variety of different types of electronic equipment, and can be used to supply power to the electronic equipment, so as to realize the normal use of the electronic equipment.
  • An energy storage device provided by an embodiment of the present invention, as shown in FIGS. 1 to 8, includes an energy conversion element 3 and a casing 1. Wherein, the energy conversion element 3 has at least one electrical connection portion 31 provided on the surface thereof.
  • the housing 1 includes a conductor layer 14 and at least one insulating layer 15 that are compounded together. A cavity is formed inside the housing 1, and at least one insulating layer 15 is located on one side of the cavity. A hollow structure 2 is provided on the insulating layer 15 on the side, and the conductor layer 14 is exposed on the hollow structure 2 to form a contact portion, and the electrical connection portion 31 is connected to the contact portion.
  • the housing 1 includes a first half-shell 11 and a second half-shell 12 that are hermetically connected together, and at least one of the first half-shell 11 and the second half-shell 12 includes a recess The structure and an edge portion 13 formed by extending outwardly from the edge of the recessed structure; the hollow structure 2 is provided on the recessed structure.
  • the energy storage device provided by the embodiment of the present invention does not require the electrical connection portion 31 on the energy conversion element 3 to be led out from the edges of the first half-shell 11 and the second half-shell 12, which overcomes the existing problems in the prior art. It is difficult to bend the edges of the battery case.
  • This design also facilitates the formation of a good sealing connection between the first half-shell 11 and the second half-shell 12, which can improve the waterproof and dustproof performance of the entire housing 1 and avoid adverse effects on the internal energy conversion element 3.
  • the housing 1 is designed as a composite layer structure including a conductor layer 14 and an insulating layer 15, and a hollow structure 2 is provided on the insulating layer 15 so that the conductor layer 14 can be exposed in the hollow
  • the structure 2 is used to form a contact portion, so that the internal energy conversion element 3 can be electrically connected to the outside through the conductor layer 14 exposed in the hollow structure 2.
  • the energy storage device provided by the embodiment of the present invention has a simpler structure, is more convenient to manufacture, and can meet good sealing requirements.
  • a heat isolation layer is further provided between the energy conversion element 3 and the electrical connection portion 31.
  • the heat isolation layer can function to isolate heat.
  • the portion of the conductor layer 14 exposed from the hollow structure 2, that is, the contact portion can be connected to the electrical connection portion 31 of the energy conversion element 3 by welding. together.
  • the design of providing a heat isolation layer between the energy conversion element 3 and the electrical connection portion 31 can effectively prevent the heat generated during welding from being directly conducted to the energy conversion element 3, thereby causing damage to the energy conversion element 3.
  • the energy storage device is, for example, a soft pack battery
  • the energy conversion element 3 is, for example, a bare cell in the battery
  • the electrical connection portion 31 is, for example, a tab or an electrode sheet that is not covered by electrode active material. Area.
  • the solder joint or bead passes through the conductor layer 14 from the outside of the housing 1.
  • the welding pins are located on the outside of the housing 1 instead of on the side of the recessed structure. In this way, the housing 1 does not need to leave space for welding, for example, laser welding is used for welding.
  • the weld bead or spot gradually spreads inward from the outer surface of the conductor layer 14 to the electrical connection portion 31, and the two are melted and connected together.
  • solder joints or beads gradually spread to the surrounding from the contact surface of the conductor layer 14 and the electrical connection portion 31.
  • the solder pins are also located on the outside of the housing 1. The solder pins abut the conductor layer 14.
  • the current reaches the contact surface. Since there is a gap between the conductor layer 14 and the electrical connection portion 31 at the contact surface, a resistance can be formed. Under the action of the current, the contact surface gradually melts, and the conductor layer 14 and the electrical connection portion 31 are connected together.
  • Both of the above two welding methods can form an effective connection between the conductor layer 14 and the electrical connection portion 31.
  • steel shell battery welding technology can be used for welding the electrical connection part 31 of the energy conversion element 3, and the battery shell 1 can take into account the characteristics of the soft pack battery shell, so that the battery has a significant improvement in safety and assembly process. .
  • the conductive layer 14 of the housing 1 and the electrical connection portion 31 of the energy conversion element 3 can also be connected through atmospheric pressure.
  • atmospheric pressure By adopting the atmospheric pressure method, there is no need to use a welding process, and atmospheric pressure can be used to compress the conductor layer 14 so that the conductor layer 14 and the electrical connection portion 31 can be tightly combined to achieve good contact and conduction between the two.
  • the energy storage device provided by the embodiment of the present invention is shown in FIGS. 1-3 and 5-7.
  • the housing 1 includes a first half-shell 11 and a second half-shell 12, and the first half-shell Both the body 11 and the second half-shell 12 have open ends.
  • the first half-shell 11 and the second half-shell 12, for example, can be buckled together with the open ends facing each other and sealedly connected.
  • the first half-shell 11 and the second half-shell 12 are jointly enclosed to form Containment cavity.
  • the energy conversion element 3 in the energy storage device is accommodated in the accommodation cavity.
  • the first half shell 11 and the second half shell 12 can seal the energy conversion element 3 as a whole, so as to protect the energy conversion element 3, and can play the role of waterproof and dustproof.
  • the energy conversion element 3 is, for example, a bare cell.
  • the energy conversion element 3 may be, but is not limited to, a lithium ion bare cell, a lithium metal bare cell, etc., of course, may also be other types of bare cells known to those skilled in the art.
  • the housing 1 has, for example, a rectangular parallelepiped structure, a cylindrical structure, an elliptical cylindrical structure, or the like. Those skilled in the art can make settings according to actual needs.
  • the housing 1 includes a conductor layer 14 and at least one insulating layer 15 that are compounded together.
  • the conductor layer 14 may be, for example, a metal material such as an aluminum alloy material, a copper alloy material, or a stainless steel material.
  • the material of the insulating layer 15 is, for example, a plastic material. Those skilled in the art can make adjustments flexibly according to specific needs, and there is no restriction on this.
  • the material of the housing 1 is a metal-plastic composite film.
  • the conductor layer 14 is usually a metal material, which can be used to improve the strength of the entire casing 1. Since the surface of the metal material is relatively dense and the surface gap is small, it can play a good role in dustproof and waterproof, and it can also effectively prevent the electrolyte from leaking out of the energy storage device. At the same time, the conductor layer 14 has conductivity, and the internal energy conversion element 3 can be electrically connected to the outside through the conductor layer 14, without the electrical connection portion 31 of the energy conversion element 3 being led out of the housing 1 to affect the housing 1. The tightness of the seal, and lead to difficulties in bending the sealing edge.
  • the insulating layer 15 is made of a non-conductive material, which is equivalent to providing an insulating film between the electrical connection portion 31 of the energy conversion element 3 and the housing 1 during use, which can avoid the occurrence of a short circuit.
  • the conductor layer 14 includes an inner surface on one side of the cavity and an outer surface opposite to the inner surface.
  • the outer surface is compounded with the insulating layer 15, and the hollow structure 2 is formed at the corresponding positions of the two insulating layers 15. That is, the conductor layer 14 is located in the middle, and insulating layers 15 are respectively provided on the two surfaces of the conductor layer 14.
  • the hollow structure 2 needs to be formed on both insulating layers 15 to expose the conductive layer 14 to form a contact portion, so that the internal energy conversion element 3 can be electrically connected to the outside through the contact portion.
  • the hollow structure 2 formed on the inner surface of the conductor layer 14 may be located directly above the electrical connection portion 31 on the energy conversion element 3 to facilitate the contact and conduction with the electrical connection portion 31.
  • the specific position of the hollow structure 2 formed on the outer surface of the layer 14 can be flexibly adjusted according to actual needs.
  • the insulating layer 15 is combined with the conductive layer 14 by injection molding or bonding, so that the conductive layer 14 and the insulating layer 15 can be combined together well.
  • the hollow structure 2 is formed on the insulating layer 15 by removing material.
  • the shell 1 adopts a metal-plastic composite film, and the metal-material composite film is first stamped and formed, and then squeegee treatment is performed on the plastic layer to form the hollow at a suitable position.
  • Structure 2 the metal-material composite film is first stamped and formed, and then squeegee treatment is performed on the plastic layer to form the hollow at a suitable position.
  • the shell 1 adopts a metal-plastic composite film, and the plastic layer of the metal-plastic composite film can be squeegeed first to form the hollow structure 2, and then the metal-plastic composite film The composite film is stamped and formed to form the housing 1.
  • edge portion 13 of the first half-shell 11 and the edge portion 13 of the second half-shell 12 are connected in a sealed manner to form a sealed edge, and a part of the sealed edge is bent toward the first side of the shell , And the other part is bent toward the second side of the housing in a direction opposite to the first side.
  • a part of the sealing edge is bent toward the first side, and another part is bent toward the second side, instead of being bent toward one side as a whole. In this way, the rebounding forces of the bending on both sides can cancel each other, thereby preventing the sealing edge from separating from the side wall of the housing 1.
  • the sealing edge can be evenly attached to the outer surface of the housing 1 without forming wrinkles.
  • the surface of the energy storage device is flat.
  • the sealing edge has a set distance from the outer surface of the housing 1 after bending, instead of being attached to the outer surface.
  • edge portion 13 of the first half-shell 11 and the edge portion 13 of the second half-shell 12 may be welded together, for example, by heat melting or ultrasonic.
  • the edge portions 13 of the two half-shells are made of plastic material.
  • the edge 13 of one half-shell is made of transparent plastic
  • the edge 13 of the other half-shell is made of colored plastic, such as black plastic, green plastic, or red plastic.
  • bumps are provided on the inner surface of the hollow structure 2 and/or the contact portion of the electrical connection portion 31.
  • a plurality of bumps are provided on the inner surface of the hollow structure 2 and the plurality of bumps are distributed in a matrix.
  • the bumps first contact the electrical connection portion 31. Due to atmospheric pressure, pits are formed on the electrical connection portion 31.
  • the matching of the bumps and the pits can effectively prevent the hollow structure 2 from moving relative to the electrical connection portion 31. This method is equivalent to directly contacting the hollow structure 2 with the electrical connection portion 31 on the energy conversion element 3, and the contact connection method is relatively simple.
  • the bumps can increase the contact area of the two, and the hollow structure 2 and the electrical connection portion 31 are in contact in space, not only in the plane. . This makes the electrical connection between the two more stable.
  • the energy conversion element 3 of the present invention has a structure as follows: as shown in FIG. 2, it includes an energy conversion element body and the electrical connection portion 31 mechanically connected to the energy storage element body, or the electrical connection portion 31 is The part where the energy storage element body extends on its surface.
  • the electrical connection portion 31 is electrically connected to the outside through the conductor layer 14, so there is no need to lead the electrical connection portion 31 out from the edges of the first half-shell 11 and the second half-shell 12, which overcomes the existing Defects in technology.
  • the energy storage device provided by the present invention may be, for example, a soft pack battery, or of course, may also be a steel shell battery.
  • the energy conversion element 3 is a bare cell, which may be a wound bare cell or a laminated bare cell, which is not limited.
  • the wound type bare cell is a whole piece of electrode sheet (for example, the electrode sheet includes a positive electrode sheet, a negative electrode sheet, and a separator between the positive electrode sheet and the negative electrode sheet) wound into a spiral structure.
  • the laminated bare cell, that is, the electrode sheet is divided into a plurality of sheets, and the plurality of sheets are laminated together.
  • a core post 32 is further provided inside the energy conversion element 3. At least part of the core post 32 is opposite to the electrical connection portion 31 (for example, a tab), and the electrical connection portion 31 It is compressed between the conductor layer 14 and the core post 32. Setting the core post 32 at the middle of the energy conversion element 3 can further strengthen the holding force between the conductor layer 14 and the electrical connection portion 31 on the energy conversion element 3, thereby achieving better contact between the two and at the same time
  • the electrical connection part 31 can be protected from the upper and lower pressure to protect the electrical connection part 31.
  • the core post 32 is an insulating material, for example, the material is plastic, ceramic, glass, or the like.
  • the shape of the core column 32 is a column, a square column, an elliptical column, a polygonal column, and the like.
  • the energy conversion element 3 is arranged around the stem 32.
  • Electrical connection parts 31 are provided at both ends of the energy conversion element 3 in the axial direction.
  • the two electrical connection portions 31 abut against the two ends of the stem 32 respectively.
  • the core post 32 can press the electrical connection part 3 together with the conductor layer 14 so that the electrical connection part 3 and the conductor layer 14 can be in good contact and conduction.
  • the energy conversion element 3 has a laminated structure.
  • the stem 32 is perpendicular to the surface of each layer.
  • a core post 32 penetrating each layer is provided in the middle of the energy conversion element 3.
  • the stem 32 can also play a role in supporting the electrical connection portion 31.
  • the energy storage device provided by the embodiment of the present invention may be, for example, a soft pack battery or a steel shell battery.
  • the energy storage device can be used in a variety of electronic equipment.
  • the electronic device may be, but is not limited to, a mobile phone, a tablet computer, a smart watch, a notebook computer, a game console, a walkie-talkie, a headset, an e-book reader, etc.
  • the above-mentioned electronic equipment includes an electronic equipment housing and an energy storage device.
  • a PCB is provided in the housing of the electronic device.
  • the energy storage device is arranged in the electronic housing, and is electrically connected to the electrical equipment in the electronic equipment through the PCB, so as to supply power to the electrical equipment so that the electronic equipment can be used normally.
  • the embodiment of the present invention also provides an assembling method of the energy storage device.
  • the energy storage device includes an energy conversion element 3 and a housing 1.
  • the energy conversion element 3 has at least one electrical connection portion 31 provided on the surface thereof.
  • the housing 1 includes a conductor layer 14 and at least one insulating layer 15 that are compounded together.
  • a cavity is formed inside the housing 1, and at least one insulating layer 15 is located on one side of the cavity.
  • a hollow structure 2 is provided on the insulating layer 15 on the side, and the conductor layer 14 is exposed on the hollow structure 2 to form a contact portion.
  • the energy conversion element 3 is placed in the cavity.
  • the housing 1 is closed to form an energy storage device.
  • the cavity is evacuated, and the conductor layer 14 is pressed against the electrical connection portion 31 of the energy conversion element 3 by using atmospheric pressure.
  • the air pressure in the cavity is less than atmospheric pressure.
  • the conductor layer 14 gradually approaches the electrical connection portion 31, and finally contacts the electrical connection portion 31, and is closely attached to each other.
  • the energy conversion element 3 is electrically connected to the external circuit through the electrical connection portion 31 and the conductor layer 14.
  • the conductor layer 14 is contacted with the electrical connection portion 31 of the energy conversion element 3 using atmospheric pressure. As opposed to using welding to connect the two. In this way, the internal energy conversion element 3 will not be affected by high temperature, thereby maintaining good energy conversion performance.
  • the inside of the casing 1 will gradually expand due to the effect of the internal pressure.
  • the conductor layer 14 may gradually move away from the energy conversion element 3 until it is separated from the electrical connection portion 31. In this way, a disconnection is formed between the conductor layer 14 and the electrical connection portion 31, and the charging and discharging are stopped. In this way, the explosion of the energy storage device can be effectively avoided, and the safety of the use of the energy storage device can be ensured.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

Disclosed are an energy storage device and a method for assembling the energy storage device. The energy storage device comprises an energy conversion element and a housing; the energy conversion element is provided with at least one electrical connection part, which is arranged on a surface of the energy conversion element; the housing comprises a conductor layer and at least one insulating layer, which are compounded together, a cavity is formed inside the housing, the at least one insulating layer is positioned on one side of the cavity, a hollow structure is arranged on the insulating layer positioned on one side of the cavity, the conductor layer is exposed on the hollow structure to form a contact part, and the electrical connection part is connected to the contact part; the housing comprises a first half housing body and a second half housing body, which are connected together in a sealed manner, and at least one of the first half housing body and the second half housing body comprises a concave structure and a surrounding edge part, which is formed by the edge of the concave structure extending outwards; and the hollow structure is arranged on the concave structure. The energy storage device of the present invention has a simple structure, and easily realizes edge sealing and bending.

Description

一种储能装置以及储能装置的组装方法Energy storage device and method for assembling the energy storage device 技术领域Technical field
本发明涉及储能器件技术领域，更具体地，本发明涉及一种储能装置以及储能装置的组装方法。The present invention relates to the technical field of energy storage devices, and more specifically, the present invention relates to an energy storage device and an assembly method of the energy storage device.
背景技术Background technique
储能装置例如包括有电池、电容器等。在电子产品中通常需要设置电池，由电池进行供电，以实现电子设备的正常使用。用于电子产品中的电池例如可以为钢壳电池或者软包电池等。The energy storage device includes, for example, a battery, a capacitor, and the like. In electronic products, it is usually necessary to provide a battery, which is powered by the battery, so as to realize the normal use of the electronic device. The battery used in the electronic product may be, for example, a steel shell battery or a soft pack battery.
现有的软包电池通常包括卷芯和扣合在一起的两个半壳体，卷芯被组装到两个半壳体包围的空间内。卷芯的两个极耳从两个半壳体的边缘处向外伸出用以进行电连接，这就导致电池存在封边弯折较为困难的问题，容易导致包装膜破损而产生漏液现象。甚至还有可能会影响到电池的整体密封性，导致防水、防尘等性能下降。若软包纽扣电池内的裸电芯为卷绕式结构，极耳引出角度不稳定，则更不易进行封边弯折，也难以实现自动化生产。极耳弯折后再进行热封处理，增加了封口难度，还有可能会影响到电池空间利用率，降低电池能量密度。The existing soft-pack battery usually includes a winding core and two half-shells that are snapped together, and the winding core is assembled into a space surrounded by the two half-shells. The two tabs of the winding core protrude from the edges of the two half shells for electrical connection, which leads to the problem that the battery is more difficult to seal and bend, and it is easy to cause damage to the packaging film and cause liquid leakage. . It may even affect the overall sealing of the battery, resulting in performance degradation such as waterproof and dustproof. If the bare cell in the soft-pack button battery has a winding structure and the lead angle of the tab is unstable, it is more difficult to bend the edges and to realize automated production. After the tabs are bent, heat sealing is performed, which increases the difficulty of sealing, and may also affect the battery space utilization rate and reduce the battery energy density.
钢壳电池虽然组装工艺较为简单，但是其安全性能较差。而且，钢壳还具有重量大，正、负极距离小容易短路的缺陷。Although the assembly process of the steel shell battery is relatively simple, its safety performance is poor. Moreover, the steel shell also has the disadvantages of high weight, small distance between the positive electrode and the negative electrode, and easy short-circuiting.
因此，很有必要提供一种新的技术方案，以解决上述技术问题。Therefore, it is necessary to provide a new technical solution to solve the above technical problems.
发明内容Summary of the invention
本发明的一个目的是提供一种储能装置以及储能装置的组装方法的新技术方案。An object of the present invention is to provide a new technical solution for an energy storage device and an assembling method of the energy storage device.
根据本发明的第一方面，提供了一种储能装置，包括：According to the first aspect of the present invention, there is provided an energy storage device, including:
能量转换元件，所述能量转换元件具有设置在其表面的至少一个电连接部；以及An energy conversion element, the energy conversion element having at least one electrical connection portion provided on the surface thereof; and
壳体，所述壳体包括复合在一起的导体层和至少一个绝缘层，在所述壳体的内部形成腔体，至少一个所述绝缘层位于腔体一侧，在位于腔体一侧的所述绝缘层上设置有镂空结构，所述导体层暴露在所述镂空结构，以形成接触部，所述电连接部与所述接触部连接；A housing, the housing includes a conductor layer and at least one insulating layer compounded together, a cavity is formed inside the housing, at least one of the insulating layers is located on one side of the cavity, and is located on the side of the cavity. A hollow structure is provided on the insulating layer, the conductor layer is exposed on the hollow structure to form a contact portion, and the electrical connection portion is connected to the contact portion;
所述壳体包括密封连接在一起的第一半壳体和第二半壳体，所述第一半壳体和所述第二半壳体中的至少一个包括凹陷结构和围绕由所述凹陷结构的边缘向外延伸形成的边缘部；在所述凹陷结构上设置有所述镂空结构。The housing includes a first half-shell and a second half-shell that are hermetically connected together, and at least one of the first half-shell and the second half-shell includes a recessed structure and is surrounded by a recessed structure. An edge portion formed by the edge of the structure extending outward; the hollow structure is provided on the recessed structure.
可选地，所述边缘部通过热熔或者超声的方式焊接在一起。Optionally, the edge portions are welded together by heat melting or ultrasonic.
可选地，通过去料处理的方式形成所述镂空结构。Optionally, the hollow structure is formed by removing material.
可选地，在所述第一半壳体和所述第二半壳体密封连接后，上下两侧折，所述边缘部被折向所述壳体的侧壁。Optionally, after the first half-shell and the second half-shell are hermetically connected, the upper and lower sides are folded, and the edge portion is folded toward the side wall of the housing.
可选地，所述绝缘层的材质为塑料。Optionally, the material of the insulating layer is plastic.
可选地，所述导体层包括位于腔体一侧的内表面，以及与所述内表面相对的外表面，在所述内表面和所述外表面均复合有所述绝缘层，在两个所述绝缘层的相应位置均形成所述镂空结构。Optionally, the conductor layer includes an inner surface on one side of the cavity and an outer surface opposite to the inner surface. The insulating layer is compounded on both the inner surface and the outer surface. Corresponding positions of the insulating layer all form the hollow structure.
可选地，所述能量转换元件包括能量转换元件本体和与所述储能元件本体机械连接的所述电连接部，或者所述电连接部为所述储能元件本体在其表面延伸的部分。Optionally, the energy conversion element includes an energy conversion element body and the electrical connection part mechanically connected to the energy storage element body, or the electrical connection part is a part of the energy storage element body extending on its surface .
可选地，所述能量转换元件为卷绕式裸电芯或者叠片式裸电芯。Optionally, the energy conversion element is a wound bare cell or a laminated bare cell.
可选地，所述电连接部与所述接触部的内表面焊接；Optionally, the electrical connection part is welded to the inner surface of the contact part;
在进行焊接时，焊点或者焊道从所述壳体的外侧穿过所述接触部；或者During welding, the welding spot or welding pass passes through the contact part from the outside of the housing; or
焊点或者焊道由所述接触部与所述电连接部的接触面处向周围逐渐扩散。The solder joints or weld beads gradually spread to the surroundings from the contact surface of the contact portion and the electrical connection portion.
可选地，所述储能装置为软包电池。Optionally, the energy storage device is a soft pack battery.
根据本发明的第二方面，提供了一种储能装置的组装方法，所述储能装置包括：According to a second aspect of the present invention, there is provided an assembling method of an energy storage device, the energy storage device comprising:
能量转换元件，所述能量转换元件具有设置在其表面的至少一个电连接部；以及An energy conversion element, the energy conversion element having at least one electrical connection portion provided on the surface thereof; and
壳体，所述壳体包括复合在一起的导体层和至少一个绝缘层，在所述壳体的内部形成腔体，至少一个所述绝缘层位于腔体一侧，在位于腔体一侧的所述绝缘层上设置有镂空结构，所述导体层暴露在所述镂空结构，以形成接触部；A housing, the housing includes a conductor layer and at least one insulating layer compounded together, a cavity is formed inside the housing, at least one of the insulating layers is located on one side of the cavity, and is located on the side of the cavity. A hollow structure is provided on the insulating layer, and the conductor layer is exposed on the hollow structure to form a contact portion;
所述组装方法包括：The assembly method includes:
将所述能量转换元件放置到所述腔体内；Placing the energy conversion element in the cavity;
对所述壳体抽真空，利用大气压力挤压所述接触部，以使所述接触部与所述电连接部接触；以及Evacuating the housing and squeezing the contact portion with atmospheric pressure so that the contact portion is in contact with the electrical connection portion; and
将所述壳体进行封闭。The shell is closed.
可选地，在所述腔体内的气压高于大气压强时，所述电连接部与所述接触部分离。Optionally, when the air pressure in the cavity is higher than the atmospheric pressure, the electrical connection part is separated from the contact part.
根据本公开的一个实施例，在所述储能装置中，无需将电连接部从两个半壳体的边缘处向外伸出，便于两个半壳体形成良好的密封连接。通过在壳体上挖孔形成镂空结构，将壳体的导体层从镂空结构中露出，以使内部能量转换元件可以直接通过壳体的导体层与外部实现电连接，简化了储能装置的结构，避免出现因电连接部引出而导致的电池封边弯折较为困难的问题。同时，对于能量转换元件上电连接部的焊接可以采用钢壳电池焊接技术，电池外壳可兼顾软包电池外壳特性，电池在安全与组装工艺方面都有明显改善。本发明所要实现的技术任务或者所要解决的技术问题是本领域技术人员从未想到的或者没有预期到的，故本发明是一种新的技术方案。According to an embodiment of the present disclosure, in the energy storage device, there is no need to extend the electrical connection part from the edges of the two half-shells, so that the two half-shells can form a good sealed connection. By digging holes in the shell to form a hollow structure, the conductor layer of the shell is exposed from the hollow structure, so that the internal energy conversion element can be directly electrically connected to the outside through the conductor layer of the shell, which simplifies the structure of the energy storage device , To avoid the problem that the battery edge is more difficult to bend and bend due to the lead out of the electrical connection part. At the same time, for the welding of the electrical connection part of the energy conversion element, the steel shell battery welding technology can be used, and the battery shell can take into account the characteristics of the soft pack battery shell, and the battery has a significant improvement in safety and assembly process. The technical task to be achieved or the technical problem to be solved by the present invention is never thought of or unexpected by those skilled in the art, so the present invention is a new technical solution.
通过以下参照附图对本发明的示例性实施例的详细描述，本发明的其它特征及其优点将会变得清楚。Through the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings, other features and advantages of the present invention will become clear.
附图说明Description of the drawings
被结合在说明书中并构成说明书的一部分的附图示出了本发明的实施例，并且连同其说明一起用于解释本发明的原理。The drawings incorporated in the specification and constituting a part of the specification illustrate the embodiments of the present invention, and together with the description are used to explain the principle of the present invention.
图1是根据本公开一个实施例提供的储能装置的立体图。Fig. 1 is a perspective view of an energy storage device provided according to an embodiment of the present disclosure.
图2是图1的侧视图。Fig. 2 is a side view of Fig. 1.
图3是根据本公开另一个实施例提供的储能装置的立体图。Fig. 3 is a perspective view of an energy storage device provided according to another embodiment of the present disclosure.
图4是图3的俯视图。Fig. 4 is a top view of Fig. 3.
图5是根据本公开一个实施例提供的储能装置的结构分解图。Fig. 5 is a structural exploded view of an energy storage device provided according to an embodiment of the present disclosure.
图6是图5的侧视图。Fig. 6 is a side view of Fig. 5.
图7是根据本公开一个实施例提供的储能装置的结构示意图。Fig. 7 is a schematic structural diagram of an energy storage device provided according to an embodiment of the present disclosure.
图8是根据本公开一个实施例提供的储能装置的剖视图。Fig. 8 is a cross-sectional view of an energy storage device provided according to an embodiment of the present disclosure.
附图标记说明：Description of reference signs:
1-壳体，11-第一半壳体，12-第二半壳体，13-边缘部，14-导体层，15-绝缘层，2-镂空结构，3-能量转换元件，31-电连接部，32-芯柱。1-shell, 11-first half-shell, 12-second half-shell, 13-edge, 14-conductor layer, 15-insulation layer, 2-hollow structure, 3-energy conversion element, 31-electric Connection part, 32-stem.
具体实施方式Detailed ways
现在将参照附图来详细描述本发明的各种示例性实施例。应注意到：除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本发明的范围。Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless specifically stated otherwise, the relative arrangement of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention.
以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本发明及其应用或使用的任何限制。The following description of at least one exemplary embodiment is actually only illustrative, and in no way serves as any limitation to the present invention and its application or use.
对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨论，但在适当情况下，所述技术、方法和设备应当被视为说明书的一部分。The technologies, methods, and equipment known to those of ordinary skill in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be regarded as part of the specification.
在这里示出和讨论的所有例子中，任何具体值应被解释为仅仅是示例性的，而不是作为限制。因此，示例性实施例的其它例子可以具有不同的值。In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiment may have different values.
应注意到：相似的标号和字母在下面的附图中表示类似项，因此， 一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步讨论。It should be noted that similar reference numerals and letters indicate similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further discussed in the subsequent drawings.
根据本公开的一个实施例，提供了一种储能装置。该储能装置例如可以为电池或者电容器等。当储能装置为电池时，例如可以为软包电池，当然也可以为钢壳电池等。电池可以为一次电池或者二次电池。本发明实施例提供的储能装置可以应用在多种不同类型的电子设备中，能够用于为电子设备供电，以实现电子设备的正常使用。According to an embodiment of the present disclosure, an energy storage device is provided. The energy storage device may be, for example, a battery or a capacitor. When the energy storage device is a battery, for example, it may be a soft pack battery, or of course, it may also be a steel shell battery. The battery may be a primary battery or a secondary battery. The energy storage device provided by the embodiment of the present invention can be applied to a variety of different types of electronic equipment, and can be used to supply power to the electronic equipment, so as to realize the normal use of the electronic equipment.
本发明实施例提供的一种储能装置，如图1-图8所示，其包括能量转换元件3以及壳体1。其中，所述能量转换元件3具有设置在其表面的至少一个电连接部31。所述壳体1包括复合在一起的导体层14和至少一个绝缘层15，在所述壳体1的内部形成腔体，至少一个所述绝缘层15位于腔体一侧，在位于腔体一侧的所述绝缘层15上设置有镂空结构2，所述导体层14暴露在所述镂空结构2，以形成接触部，所述电连接部31与所述接触部连接。并且，所述壳体1包括密封连接在一起的第一半壳体11和第二半壳体12，所述第一半壳体11和所述第二半壳体12中的至少一个包括凹陷结构和围绕由所述凹陷结构的边缘向外延伸形成的边缘部13；在所述凹陷结构上设置有所述镂空结构2。An energy storage device provided by an embodiment of the present invention, as shown in FIGS. 1 to 8, includes an energy conversion element 3 and a casing 1. Wherein, the energy conversion element 3 has at least one electrical connection portion 31 provided on the surface thereof. The housing 1 includes a conductor layer 14 and at least one insulating layer 15 that are compounded together. A cavity is formed inside the housing 1, and at least one insulating layer 15 is located on one side of the cavity. A hollow structure 2 is provided on the insulating layer 15 on the side, and the conductor layer 14 is exposed on the hollow structure 2 to form a contact portion, and the electrical connection portion 31 is connected to the contact portion. In addition, the housing 1 includes a first half-shell 11 and a second half-shell 12 that are hermetically connected together, and at least one of the first half-shell 11 and the second half-shell 12 includes a recess The structure and an edge portion 13 formed by extending outwardly from the edge of the recessed structure; the hollow structure 2 is provided on the recessed structure.
本发明实施例提供的储能装置，无需将能量转换元件3上的电连接部31从第一半壳体11和第二半壳体12的边缘向外引出，克服了现有技术中存在的电池壳体封边弯折较为困难的问题。该设计也便于第一半壳体11和第二半壳体12之间形成良好的密封连接，可以提高整个壳体1的防水、防尘性能，避免对内部的能量转换元件3造成不良影响。本发明中，通过特殊的结构改良，将壳体1设计为包括导体层14和绝缘层15的复合层结构，并在绝缘层15上开设了镂空结构2，以使导体层14可以暴露在镂空结构2内，用以形成接触部，这样通过暴露于镂空结构2内的导体层14可以实现内部能量转换元件3与外部的电连接。本发明实施例提供的储能装置，结构更为简单，制作起来也比较方便，且能满足良好的密封要求。The energy storage device provided by the embodiment of the present invention does not require the electrical connection portion 31 on the energy conversion element 3 to be led out from the edges of the first half-shell 11 and the second half-shell 12, which overcomes the existing problems in the prior art. It is difficult to bend the edges of the battery case. This design also facilitates the formation of a good sealing connection between the first half-shell 11 and the second half-shell 12, which can improve the waterproof and dustproof performance of the entire housing 1 and avoid adverse effects on the internal energy conversion element 3. In the present invention, through a special structural improvement, the housing 1 is designed as a composite layer structure including a conductor layer 14 and an insulating layer 15, and a hollow structure 2 is provided on the insulating layer 15 so that the conductor layer 14 can be exposed in the hollow The structure 2 is used to form a contact portion, so that the internal energy conversion element 3 can be electrically connected to the outside through the conductor layer 14 exposed in the hollow structure 2. The energy storage device provided by the embodiment of the present invention has a simpler structure, is more convenient to manufacture, and can meet good sealing requirements.
本发明实施例提供的储能装置，在所述能量转换元件3与所述电连接部31之间还设置有热量隔离层。所述热量隔离层能够起到隔离热量的作用。In the energy storage device provided by the embodiment of the present invention, a heat isolation layer is further provided between the energy conversion element 3 and the electrical connection portion 31. The heat isolation layer can function to isolate heat.
在本发明的一种具体实施方式中，所述导体层14从镂空结构2中露出的部分，即接触部，可以将其与所述能量转换元件3的电连接部31通过焊接的方式连接在一起的。在所述能量转换元件3与所述电连接部31之间设置热量隔离层的设计，能有效地防止焊接时产生的热量直接传导至能量转换元件3，从而对能量转换元件3造成损伤。在本实施方式中，储能装置例如为软包电池，则所述能量转换元件3例如为电池内的裸电芯，所述电连接部31例如为极耳或者电极片的未覆盖电极活性材料的区域。In a specific embodiment of the present invention, the portion of the conductor layer 14 exposed from the hollow structure 2, that is, the contact portion, can be connected to the electrical connection portion 31 of the energy conversion element 3 by welding. together. The design of providing a heat isolation layer between the energy conversion element 3 and the electrical connection portion 31 can effectively prevent the heat generated during welding from being directly conducted to the energy conversion element 3, thereby causing damage to the energy conversion element 3. In this embodiment, the energy storage device is, for example, a soft pack battery, the energy conversion element 3 is, for example, a bare cell in the battery, and the electrical connection portion 31 is, for example, a tab or an electrode sheet that is not covered by electrode active material. Area.
在将导体层14(接触部)与电连接部31进行焊接时，焊点或者焊道是从壳体1的外侧穿过导体层14。在施焊时，焊针位于壳体1的外侧而不是位于凹陷结构一侧。这样，壳体1不需要为焊接留出空间，例如，采用激光焊接的方式进行焊接。焊道或者焊点从导体层14的外表面逐渐向内扩散至电连接部31，二者熔化并连接在一起。When the conductor layer 14 (contact portion) and the electrical connection portion 31 are welded, the solder joint or bead passes through the conductor layer 14 from the outside of the housing 1. When welding, the welding pins are located on the outside of the housing 1 instead of on the side of the recessed structure. In this way, the housing 1 does not need to leave space for welding, for example, laser welding is used for welding. The weld bead or spot gradually spreads inward from the outer surface of the conductor layer 14 to the electrical connection portion 31, and the two are melted and connected together.
也可以是，在将导体层14与电连接部31进行焊接时，焊点或者焊道由导体层14与电连接部31的接触面处向周围逐渐扩散。在该例子中，焊针同样位于壳体1的外侧。焊针与导体层14相抵。在施焊时，电流到达接触面处。由于接触面处导体层14与电连接部31之间存在缝隙，故能够形成电阻。在电流的作用下接触面逐渐熔化，并使得导体层14与电连接部31连接在一起。It is also possible that when the conductor layer 14 and the electrical connection portion 31 are welded, the solder joints or beads gradually spread to the surrounding from the contact surface of the conductor layer 14 and the electrical connection portion 31. In this example, the solder pins are also located on the outside of the housing 1. The solder pins abut the conductor layer 14. When welding, the current reaches the contact surface. Since there is a gap between the conductor layer 14 and the electrical connection portion 31 at the contact surface, a resistance can be formed. Under the action of the current, the contact surface gradually melts, and the conductor layer 14 and the electrical connection portion 31 are connected together.
上述两种焊接方式均能使导体层14与电连接部31形成有效的连接。Both of the above two welding methods can form an effective connection between the conductor layer 14 and the electrical connection portion 31.
本发明中，对于能量转换元件3上电连接部31的焊接可以采用钢壳电池焊接技术，电池的壳体1可兼顾软包电池外壳特性，以使电池在安全与组装工艺方面都有明显改善。In the present invention, steel shell battery welding technology can be used for welding the electrical connection part 31 of the energy conversion element 3, and the battery shell 1 can take into account the characteristics of the soft pack battery shell, so that the battery has a significant improvement in safety and assembly process. .
在本发明的另一种具体实施方式中，所述壳体1的导体层14与所述能量转换元件3的电连接部31之间还可以通过大气压合的方式实现接触导通。采用大气压合这种方式，无需使用焊接工艺，可以利用大气压来压 迫导体层14，以使导体层14与电连接部31能紧密的结合在一起，以使二者实现良好的接触导通。In another specific embodiment of the present invention, the conductive layer 14 of the housing 1 and the electrical connection portion 31 of the energy conversion element 3 can also be connected through atmospheric pressure. By adopting the atmospheric pressure method, there is no need to use a welding process, and atmospheric pressure can be used to compress the conductor layer 14 so that the conductor layer 14 and the electrical connection portion 31 can be tightly combined to achieve good contact and conduction between the two.
本发明实施例提供的储能装置，如图1-图3和图5-图7所示，所述壳体1包括第一半壳体11和第二半壳体12，且第一半壳体11和第二半壳体12均具有开口端。第一半壳体11和第二半壳体12例如可以以开口端相对的形式扣合在一起并密封连接，此时由第一半壳体11和第二半壳体12共同围合形成了收容腔。储能装置内的能量转换元件3被收容设置在该收容腔内。第一半壳体11和第二半壳体12可以将能量转换元件3整体密封起来，用以对能量转换元件3进行保护，能起到防水、防尘的作用。The energy storage device provided by the embodiment of the present invention is shown in FIGS. 1-3 and 5-7. The housing 1 includes a first half-shell 11 and a second half-shell 12, and the first half-shell Both the body 11 and the second half-shell 12 have open ends. The first half-shell 11 and the second half-shell 12, for example, can be buckled together with the open ends facing each other and sealedly connected. At this time, the first half-shell 11 and the second half-shell 12 are jointly enclosed to form Containment cavity. The energy conversion element 3 in the energy storage device is accommodated in the accommodation cavity. The first half shell 11 and the second half shell 12 can seal the energy conversion element 3 as a whole, so as to protect the energy conversion element 3, and can play the role of waterproof and dustproof.
其中，所述能量转换元件3例如为裸电芯。具体地，所述能量转换元件3可以是但不局限于锂离子裸电芯、锂金属裸电芯等，当然也可以是本领域技术人员熟知的其它类型的裸电芯。Wherein, the energy conversion element 3 is, for example, a bare cell. Specifically, the energy conversion element 3 may be, but is not limited to, a lithium ion bare cell, a lithium metal bare cell, etc., of course, may also be other types of bare cells known to those skilled in the art.
其中，所述壳体1例如呈长方体结构、圆柱体结构、椭圆柱体结构等。本领域技术人员可以根据实际需要进行设置。Wherein, the housing 1 has, for example, a rectangular parallelepiped structure, a cylindrical structure, an elliptical cylindrical structure, or the like. Those skilled in the art can make settings according to actual needs.
本发明实施例提供的储能装置，如图8所示，所述壳体1包括复合在一起的导体层14和至少一个绝缘层15。所述导体层14例如可以为铝合金材料、铜合金材料、不锈钢材料等金属材料。所述绝缘层15的材质例如为塑料材料等。本领域技术人员可以根据具体需要灵活进行调整，对此不作限制。例如，所述壳体1的材质为金属塑料复合膜。In the energy storage device provided by the embodiment of the present invention, as shown in FIG. 8, the housing 1 includes a conductor layer 14 and at least one insulating layer 15 that are compounded together. The conductor layer 14 may be, for example, a metal material such as an aluminum alloy material, a copper alloy material, or a stainless steel material. The material of the insulating layer 15 is, for example, a plastic material. Those skilled in the art can make adjustments flexibly according to specific needs, and there is no restriction on this. For example, the material of the housing 1 is a metal-plastic composite film.
其中，所述导体层14通常为金属材料，可用于提高整个壳体1的强度。由于金属材料表面比较致密，表面空隙较小，能起到良好的防尘、防水作用，还能有效防止储能装置内部的电解液渗出。同时，所述导体层14具有导电性，通过该导体层14可以实现内部能量转换元件3与外部的电连接，无需将能量转换元件3的电连接部31从壳体1中引出，影响壳体1的密封性，和导致封边弯折困难。Wherein, the conductor layer 14 is usually a metal material, which can be used to improve the strength of the entire casing 1. Since the surface of the metal material is relatively dense and the surface gap is small, it can play a good role in dustproof and waterproof, and it can also effectively prevent the electrolyte from leaking out of the energy storage device. At the same time, the conductor layer 14 has conductivity, and the internal energy conversion element 3 can be electrically connected to the outside through the conductor layer 14, without the electrical connection portion 31 of the energy conversion element 3 being led out of the housing 1 to affect the housing 1. The tightness of the seal, and lead to difficulties in bending the sealing edge.
其中，所述绝缘层15为非导电材料，在使用时相当于在能量转换元件3的电连接部31与壳体1之间设置了绝缘膜，可以避免发生短路现象。Wherein, the insulating layer 15 is made of a non-conductive material, which is equivalent to providing an insulating film between the electrical connection portion 31 of the energy conversion element 3 and the housing 1 during use, which can avoid the occurrence of a short circuit.
在本发明的一种具体实施方式中，如图8所示，所述导体层14包括 位于腔体一侧的内表面，以及与所述内表面相对的外表面，在所述内表面和所述外表面均复合有所述绝缘层15，在两个所述绝缘层15的相应位置均形成所述镂空结构2。即所述导体层14位于中部，在所述导体层14的两个表面上分别设置有绝缘层15。此时，需要在两层绝缘层15上都形成镂空结构2，以暴露出导体层14形成接触部，便于将内部的能量转换元件3通过接触部与外部实现电连接。在该具体实施方式中，在导体层14的内表面上形成的镂空结构2例如可以位于能量转换元件3上电连接部31的正上方，以方便与电连接部31的接触导通，在导体层14的外表面上形成的镂空结构2其具***置可以根据实际需要灵活调整。In a specific embodiment of the present invention, as shown in FIG. 8, the conductor layer 14 includes an inner surface on one side of the cavity and an outer surface opposite to the inner surface. The outer surface is compounded with the insulating layer 15, and the hollow structure 2 is formed at the corresponding positions of the two insulating layers 15. That is, the conductor layer 14 is located in the middle, and insulating layers 15 are respectively provided on the two surfaces of the conductor layer 14. At this time, the hollow structure 2 needs to be formed on both insulating layers 15 to expose the conductive layer 14 to form a contact portion, so that the internal energy conversion element 3 can be electrically connected to the outside through the contact portion. In this specific embodiment, the hollow structure 2 formed on the inner surface of the conductor layer 14 may be located directly above the electrical connection portion 31 on the energy conversion element 3 to facilitate the contact and conduction with the electrical connection portion 31. The specific position of the hollow structure 2 formed on the outer surface of the layer 14 can be flexibly adjusted according to actual needs.
可选的是，所述绝缘层15通过注塑或者粘结的方式与所述导体层14复合在一起，以使导体层14与绝缘层15可以良好的结合在一起。Optionally, the insulating layer 15 is combined with the conductive layer 14 by injection molding or bonding, so that the conductive layer 14 and the insulating layer 15 can be combined together well.
可选的是，本发明中通过去料处理的方式在绝缘层15上形成所述镂空结构2。Optionally, in the present invention, the hollow structure 2 is formed on the insulating layer 15 by removing material.
在本发明的一个具体实施方式中，所述壳体1采用金属塑料复合膜，将金属材料复合膜先冲压成型，然后再在其塑料层上进行刮胶处理，以合适的位置形成所述镂空结构2。In a specific embodiment of the present invention, the shell 1 adopts a metal-plastic composite film, and the metal-material composite film is first stamped and formed, and then squeegee treatment is performed on the plastic layer to form the hollow at a suitable position. Structure 2.
在本发明的另一个具体实施方式中，所述壳体1采用金属塑料复合膜，可以在金属塑料复合膜的塑料层上先进行刮胶处理，以形成镂空结构2，之后再将该金属塑料复合膜冲压成型，以形成所述壳体1。In another specific embodiment of the present invention, the shell 1 adopts a metal-plastic composite film, and the plastic layer of the metal-plastic composite film can be squeegeed first to form the hollow structure 2, and then the metal-plastic composite film The composite film is stamped and formed to form the housing 1.
在本发明的一个实施例中，如图7和图8所示，在所述第一半壳体11和所述第二半壳体12密封连接后，上下两侧折，所述边缘部13被折向所述壳体1的侧壁。边缘部13贴合在壳体1的侧壁上。该设计可用以减小整个壳体1的体积，以便于对储能装置进行收纳。同时，也便于将储能装置安装到电子设备中，能减小装配时所占用的空间。In an embodiment of the present invention, as shown in Figures 7 and 8, after the first half-shell 11 and the second half-shell 12 are hermetically connected, the upper and lower sides are folded, and the edge portion 13 It is folded toward the side wall of the housing 1. The edge portion 13 is attached to the side wall of the housing 1. This design can be used to reduce the volume of the entire housing 1 so as to facilitate the storage of the energy storage device. At the same time, it is also convenient to install the energy storage device into the electronic equipment, which can reduce the space occupied during assembly.
其中，所述第一半壳体11的边缘部13与所述第二半壳体12的边缘部13密封连接，以形成密封边缘，所述密封边缘的一部分向壳体的第一侧弯折，并且另一部分向与所述第一侧相反的方向向所述壳体的第二侧弯折。Wherein, the edge portion 13 of the first half-shell 11 and the edge portion 13 of the second half-shell 12 are connected in a sealed manner to form a sealed edge, and a part of the sealed edge is bent toward the first side of the shell , And the other part is bent toward the second side of the housing in a direction opposite to the first side.
例如，密封边缘的一部分朝向第一侧弯折，另一部分朝向第二侧弯折，而不是整体朝一侧弯折。通过这种方式，两侧弯折的反弹力能相互抵消，从而防止密封边缘脱离壳体1的侧壁。For example, a part of the sealing edge is bent toward the first side, and another part is bent toward the second side, instead of being bent toward one side as a whole. In this way, the rebounding forces of the bending on both sides can cancel each other, thereby preventing the sealing edge from separating from the side wall of the housing 1.
此外，与一侧弯折相比，两侧弯折使得密封边缘的周向距离更大，并且密封边缘的一部分是重叠的。这样，在弯折后，密封边缘能均匀地贴合在壳体1的外表面上，而不会形成褶皱。该储能装置的表面平整。In addition, compared with bending on one side, bending on both sides makes the circumferential distance of the sealing edge larger, and a part of the sealing edge is overlapped. In this way, after bending, the sealing edge can be evenly attached to the outer surface of the housing 1 without forming wrinkles. The surface of the energy storage device is flat.
在其他示例中，密封边缘在弯折后与壳体1的外表面具有设定距离，而不是贴合在外表面上。In other examples, the sealing edge has a set distance from the outer surface of the housing 1 after bending, instead of being attached to the outer surface.
可选的是，所述第一半壳体11的边缘部13与所述第二半壳体12的边缘部13之间例如可以通过热熔或者超声的方式焊接在一起。Optionally, the edge portion 13 of the first half-shell 11 and the edge portion 13 of the second half-shell 12 may be welded together, for example, by heat melting or ultrasonic.
其中，两个半壳体的边缘部13均为塑料材质。两个边缘部13之间存在色差。例如，其中一个半壳体的边缘部13采用透明塑料，而另一个半壳体的边缘部13采用有颜色的塑料，例如黑色塑料、绿色塑料或者红色塑料等。采用这样的设计在进行激光焊接时，可以使激光从透明塑料一侧穿入，而由于另一侧边的塑料不透明，故固能够吸收光的能量，使得激光焊接速度更快。Wherein, the edge portions 13 of the two half-shells are made of plastic material. There is a color difference between the two edge portions 13. For example, the edge 13 of one half-shell is made of transparent plastic, and the edge 13 of the other half-shell is made of colored plastic, such as black plastic, green plastic, or red plastic. With this design, when laser welding is performed, the laser can penetrate from one side of the transparent plastic, and because the plastic on the other side is opaque, it can absorb the energy of light, making the laser welding faster.
在本发明的一个实施例中，在所述镂空结构2的内表面和/或所述电连接部31的用于接触的部位设置有凸点。例如，在所述镂空结构2的内表面设置有多个凸点，多个凸点呈矩阵分布。在进行抽真空时，凸点首先与电连接部31接触。由于大气压力的作用，故电连接部31上形成凹坑。凸点与凹坑相配合，能够有效地防止镂空结构2相对于电连接部31发生移动。该方式相当于将镂空结构2与能量转换元件3上的电连接部31直接接触，接触式连接方式比较简单。此外，在镂空结构2和电连接部31压合完全时，凸点能够增大二者的接触面积，并且镂空结构2和电连接部31在空间上形成接触，而不仅仅在平面内的接触。这使得二者的电连接更稳定。In an embodiment of the present invention, bumps are provided on the inner surface of the hollow structure 2 and/or the contact portion of the electrical connection portion 31. For example, a plurality of bumps are provided on the inner surface of the hollow structure 2 and the plurality of bumps are distributed in a matrix. When vacuuming is performed, the bumps first contact the electrical connection portion 31. Due to atmospheric pressure, pits are formed on the electrical connection portion 31. The matching of the bumps and the pits can effectively prevent the hollow structure 2 from moving relative to the electrical connection portion 31. This method is equivalent to directly contacting the hollow structure 2 with the electrical connection portion 31 on the energy conversion element 3, and the contact connection method is relatively simple. In addition, when the hollow structure 2 and the electrical connection portion 31 are completely pressed together, the bumps can increase the contact area of the two, and the hollow structure 2 and the electrical connection portion 31 are in contact in space, not only in the plane. . This makes the electrical connection between the two more stable.
本发明的能量转换元件3，其结构为：如图2所示，包括有能量转换元件本体和与所述储能元件本体机械连接的所述电连接部31，或者所 述电连接部31为所述储能元件本体在其表面延伸的部分。在本发明中，电连接部31通过导体层14与外部实现电连接，故无需将电连接部31从第一半壳体11和第二半壳体12的边缘向外引出，克服了现有技术中的缺陷。The energy conversion element 3 of the present invention has a structure as follows: as shown in FIG. 2, it includes an energy conversion element body and the electrical connection portion 31 mechanically connected to the energy storage element body, or the electrical connection portion 31 is The part where the energy storage element body extends on its surface. In the present invention, the electrical connection portion 31 is electrically connected to the outside through the conductor layer 14, so there is no need to lead the electrical connection portion 31 out from the edges of the first half-shell 11 and the second half-shell 12, which overcomes the existing Defects in technology.
本发明提供的储能装置例如可以为软包电池，当然也可以为钢壳电池。其中的能量转换元件3为裸电芯，其可以为卷绕式裸电芯，也可以叠片式裸电芯，对此不作限制。卷绕式裸电芯即整片的电极片(例如，电极片包括正极片、负极片和位于正极片和负极片之间的隔离膜)卷绕成螺旋结构。叠片式裸电芯即电极片被分割为多个片材，多个片材层叠在一起。The energy storage device provided by the present invention may be, for example, a soft pack battery, or of course, may also be a steel shell battery. The energy conversion element 3 is a bare cell, which may be a wound bare cell or a laminated bare cell, which is not limited. The wound type bare cell is a whole piece of electrode sheet (for example, the electrode sheet includes a positive electrode sheet, a negative electrode sheet, and a separator between the positive electrode sheet and the negative electrode sheet) wound into a spiral structure. The laminated bare cell, that is, the electrode sheet, is divided into a plurality of sheets, and the plurality of sheets are laminated together.
如图8所示，在所述能量转换元件3的内部还设置有芯柱32，所述芯柱32的至少局部与所述电连接部31(例如极耳)相对，所述电连接部31被压紧在所述导体层14和所述芯柱32之间。在所述能量转换元件3中部位置设置所述芯柱32，能进一步加强导体层14与能量转换元件3上的电连接部31之间的顶持力，从而实现二者更良好的接触，同时可以使电连接部31不受上下压力损伤，以保护电连接部31。As shown in FIG. 8, a core post 32 is further provided inside the energy conversion element 3. At least part of the core post 32 is opposite to the electrical connection portion 31 (for example, a tab), and the electrical connection portion 31 It is compressed between the conductor layer 14 and the core post 32. Setting the core post 32 at the middle of the energy conversion element 3 can further strengthen the holding force between the conductor layer 14 and the electrical connection portion 31 on the energy conversion element 3, thereby achieving better contact between the two and at the same time The electrical connection part 31 can be protected from the upper and lower pressure to protect the electrical connection part 31.
例如，芯柱32为绝缘材料，例如其材质为塑料、陶瓷、玻璃等。芯柱32的形状为圆柱、方形柱、椭圆形柱、多棱柱等。For example, the core post 32 is an insulating material, for example, the material is plastic, ceramic, glass, or the like. The shape of the core column 32 is a column, a square column, an elliptical column, a polygonal column, and the like.
例如，能量转换元件3绕设在芯柱32外。在能量转换元件3的轴向的两端设置有电连接部31。两个电连接部31分别与芯柱32的两端相抵。在抽真空时，芯柱32能够与导体层14一起挤压电连接部3，从而使得电连接部3与导体层14能够良好的接触导通。For example, the energy conversion element 3 is arranged around the stem 32. Electrical connection parts 31 are provided at both ends of the energy conversion element 3 in the axial direction. The two electrical connection portions 31 abut against the two ends of the stem 32 respectively. When vacuuming, the core post 32 can press the electrical connection part 3 together with the conductor layer 14 so that the electrical connection part 3 and the conductor layer 14 can be in good contact and conduction.
而在其他示例中，能量转换元件3为叠片结构。芯柱32垂直于每层的表面。在该能量转换元件3的中部设置有贯穿各层的芯柱32。该芯柱32同样能起到支撑电连接部31的作用。In other examples, the energy conversion element 3 has a laminated structure. The stem 32 is perpendicular to the surface of each layer. A core post 32 penetrating each layer is provided in the middle of the energy conversion element 3. The stem 32 can also play a role in supporting the electrical connection portion 31.
本发明实施例提供的储能装置例如可以为软包电池，也可以为钢壳电池等。该储能装置可以应用在多种电子设备中。例如，该电子设备可以是但不局限于手机、平板电脑、智能手表、笔记本电脑、游戏机、对讲机、耳机、电子书阅读器等。The energy storage device provided by the embodiment of the present invention may be, for example, a soft pack battery or a steel shell battery. The energy storage device can be used in a variety of electronic equipment. For example, the electronic device may be, but is not limited to, a mobile phone, a tablet computer, a smart watch, a notebook computer, a game console, a walkie-talkie, a headset, an e-book reader, etc.
上述的电子设备包括电子设备外壳和储能装置。The above-mentioned electronic equipment includes an electronic equipment housing and an energy storage device.
在本发明的一种具体实施方式中，在电子设备外壳内设置有PCB。储能装置被设置在电子外壳内，并通过PCB与电子设备内的用电设备电连接，用以对用电设备进行供电，以使电子设备可以正常使用。In a specific embodiment of the present invention, a PCB is provided in the housing of the electronic device. The energy storage device is arranged in the electronic housing, and is electrically connected to the electrical equipment in the electronic equipment through the PCB, so as to supply power to the electrical equipment so that the electronic equipment can be used normally.
另一方面，本发明实施例还提供了一种储能装置的组装方法。On the other hand, the embodiment of the present invention also provides an assembling method of the energy storage device.
其中，所述储能装置包括能量转换元件3以及壳体1。所述能量转换元件3具有设置在其表面的至少一个电连接部31。所述壳体1包括复合在一起的导体层14和至少一个绝缘层15，在所述壳体1的内部形成腔体，至少一个所述绝缘层15位于腔体一侧，在位于腔体一侧的所述绝缘层15上设置有镂空结构2，所述导体层14暴露在所述镂空结构2，以形成接触部。Wherein, the energy storage device includes an energy conversion element 3 and a housing 1. The energy conversion element 3 has at least one electrical connection portion 31 provided on the surface thereof. The housing 1 includes a conductor layer 14 and at least one insulating layer 15 that are compounded together. A cavity is formed inside the housing 1, and at least one insulating layer 15 is located on one side of the cavity. A hollow structure 2 is provided on the insulating layer 15 on the side, and the conductor layer 14 is exposed on the hollow structure 2 to form a contact portion.
本发明实施例提供的储能装置的组装方法，至少包括以下步骤：The assembling method of the energy storage device provided by the embodiment of the present invention includes at least the following steps:
将所述能量转换元件3放置到所述腔体内。The energy conversion element 3 is placed in the cavity.
对所述壳体1内进行抽真空处理，利用大气压力挤压所述接触部，以使所述接触部与所述能量转换元件3的电连接部31接触；以及Evacuating the inside of the housing 1 and squeezing the contact portion with atmospheric pressure so that the contact portion is in contact with the electrical connection portion 31 of the energy conversion element 3; and
将所述壳体1进行封闭，以形成储能装置。The housing 1 is closed to form an energy storage device.
本发明实施例提供的储能装置的组装方法，对所述腔体进行抽真空，利用大气压力将所述导体层14压紧在所述能量转换元件3的电连接部31上。在抽真空时，腔体内的气压小于大气压强。在大气压力的作用下壳体1的局部发生形变。导体层14逐渐靠近电连接部31，最终与电连接部31相接触，并紧密贴合在一起。在进行充、放电时，能量转换元件3通过电连接部31、导体层14与外部电路进行导通。According to the method for assembling the energy storage device provided by the embodiment of the present invention, the cavity is evacuated, and the conductor layer 14 is pressed against the electrical connection portion 31 of the energy conversion element 3 by using atmospheric pressure. When vacuuming, the air pressure in the cavity is less than atmospheric pressure. Under the action of atmospheric pressure, local deformation of the housing 1 occurs. The conductor layer 14 gradually approaches the electrical connection portion 31, and finally contacts the electrical connection portion 31, and is closely attached to each other. During charging and discharging, the energy conversion element 3 is electrically connected to the external circuit through the electrical connection portion 31 and the conductor layer 14.
在本公开实施例中，通过对腔体进行抽真空，利用大气压力将导体层14与能量转换元件3的电连接部31接触。相对于采用焊接的方式将二者连接。通过这种方式，内部的能量转换元件3不会受到高温的影响，从而保持良好的能量转换性能。In the embodiment of the present disclosure, by evacuating the cavity, the conductor layer 14 is contacted with the electrical connection portion 31 of the energy conversion element 3 using atmospheric pressure. As opposed to using welding to connect the two. In this way, the internal energy conversion element 3 will not be affected by high temperature, thereby maintaining good energy conversion performance.
此外，当壳体1的腔体内部出现气体时，例如，内部的气压大于大气压强时，由于内部气压的作用，故壳体1内部会逐渐膨胀。导体层14 可以逐渐远离能量转换元件3，直至与电连接部31分离。这样，导体层14与电连接部31之间形成断路，停止进行充、放电。通过这种方式，能有效地避免储能装置发生***，保证了储能装置使用的安全性。In addition, when gas is present in the cavity of the casing 1, for example, when the internal pressure is greater than the atmospheric pressure, the inside of the casing 1 will gradually expand due to the effect of the internal pressure. The conductor layer 14 may gradually move away from the energy conversion element 3 until it is separated from the electrical connection portion 31. In this way, a disconnection is formed between the conductor layer 14 and the electrical connection portion 31, and the charging and discharging are stopped. In this way, the explosion of the energy storage device can be effectively avoided, and the safety of the use of the energy storage device can be ensured.
虽然已经通过例子对本发明的一些特定实施例进行了详细说明，但是本领域的技术人员应该理解，以上例子仅是为了进行说明，而不是为了限制本发明的范围。本领域的技术人员应该理解，可在不脱离本发明的范围和精神的情况下，对以上实施例进行修改。本发明的范围由所附权利要求来限定。Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the invention is defined by the appended claims.

Claims (12)

  1. 一种储能装置，其特征在于：包括：An energy storage device, characterized in that it comprises:
    能量转换元件，所述能量转换元件具有设置在其表面的至少一个电连接部；以及An energy conversion element, the energy conversion element having at least one electrical connection portion provided on the surface thereof; and
    壳体，所述壳体包括复合在一起的导体层和至少一个绝缘层，在所述壳体的内部形成腔体，至少一个所述绝缘层位于腔体一侧，在位于腔体一侧的所述绝缘层上设置有镂空结构，所述导体层暴露在所述镂空结构，以形成接触部，所述电连接部与所述接触部连接；A housing, the housing includes a conductor layer and at least one insulating layer compounded together, a cavity is formed inside the housing, at least one of the insulating layers is located on one side of the cavity, and is located on the side of the cavity. A hollow structure is provided on the insulating layer, the conductor layer is exposed on the hollow structure to form a contact portion, and the electrical connection portion is connected to the contact portion;
    所述壳体包括密封连接在一起的第一半壳体和第二半壳体，所述第一半壳体和所述第二半壳体中的至少一个包括凹陷结构和围绕由所述凹陷结构的边缘向外延伸形成的边缘部；在所述凹陷结构上设置有所述镂空结构。The housing includes a first half-shell and a second half-shell that are hermetically connected together, and at least one of the first half-shell and the second half-shell includes a recessed structure and is surrounded by a recessed structure. An edge portion formed by the edge of the structure extending outward; the hollow structure is provided on the recessed structure.
  2. 根据权利要求1所述的储能装置，其特征在于：所述边缘部通过热熔或者超声的方式焊接在一起。The energy storage device according to claim 1, wherein the edge portions are welded together by heat melting or ultrasonic.
  3. 根据权利要求1-2中的任意一项所述的储能装置，其特征在于：通过去料处理的方式形成所述镂空结构。The energy storage device according to any one of claims 1-2, wherein the hollow structure is formed by removing material.
  4. 根据权利要求1-3中的任意一项所述的储能装置，其特征在于：在所述第一半壳体和所述第二半壳体密封连接后，上下两侧折，所述边缘部被折向所述壳体的侧壁。The energy storage device according to any one of claims 1-3, wherein after the first half-shell and the second half-shell are hermetically connected, the upper and lower sides are folded, and the edge The part is folded toward the side wall of the housing.
  5. 根据权利要求1-4中的任意一项所述的储能装置，其特征在于：所述绝缘层的材质为塑料。The energy storage device according to any one of claims 1-4, wherein the material of the insulating layer is plastic.
  6. 根据权利要求1-5中的任意一项所述的储能装置，其特征在于： 所述导体层包括位于腔体一侧的内表面，以及与所述内表面相对的外表面，在所述内表面和所述外表面均复合有所述绝缘层，在两个所述绝缘层的相应位置均形成所述镂空结构。The energy storage device according to any one of claims 1-5, wherein: the conductor layer includes an inner surface on one side of the cavity, and an outer surface opposite to the inner surface, and Both the inner surface and the outer surface are compounded with the insulating layer, and the hollow structure is formed at the corresponding positions of the two insulating layers.
  7. 根据权利要求1-6中的任意一项所述的储能装置，其特征在于：所述能量转换元件包括能量转换元件本体和与所述储能元件本体机械连接的所述电连接部，或者所述电连接部为所述储能元件本体在其表面延伸的部分。The energy storage device according to any one of claims 1 to 6, wherein the energy conversion element comprises an energy conversion element body and the electrical connection part mechanically connected to the energy storage element body, or The electrical connection part is a part of the energy storage element body extending on its surface.
  8. 根据权利要求1-7中的任意一项所述的储能装置，其特征在于：所述能量转换元件为卷绕式裸电芯或者叠片式裸电芯。The energy storage device according to any one of claims 1-7, wherein the energy conversion element is a wound type bare cell or a laminated type bare cell.
  9. 根据权利要求1-8中的任意一项所述的储能装置，其特征在于：所述电连接部与所述接触部的内表面焊接；The energy storage device according to any one of claims 1-8, wherein the electrical connection part is welded to the inner surface of the contact part;
    在进行焊接时，焊点或者焊道从所述壳体的外侧穿过所述接触部；或者During welding, the welding spot or welding pass passes through the contact part from the outside of the housing; or
    焊点或者焊道由所述接触部与所述电连接部的接触面处向周围逐渐扩散。The solder joints or weld beads gradually spread to the surroundings from the contact surface of the contact portion and the electrical connection portion.
  10. 根据权利要求1-9中的任意一项所述的储能装置，其特征在于：所述储能装置为软包电池。The energy storage device according to any one of claims 1-9, wherein the energy storage device is a soft pack battery.
  11. 一种储能装置的组装方法，其特征在于：所述储能装置包括：A method for assembling an energy storage device, characterized in that: the energy storage device includes:
    能量转换元件，所述能量转换元件具有设置在其表面的至少一个电连接部；以及An energy conversion element, the energy conversion element having at least one electrical connection portion provided on the surface thereof; and
    壳体，所述壳体包括复合在一起的导体层和至少一个绝缘层，在所述壳体的内部形成腔体，至少一个所述绝缘层位于腔体一侧，在位于腔体一侧的所述绝缘层上设置有镂空结构，所述导体层暴露在所述镂空结构， 以形成接触部；A housing, the housing includes a conductor layer and at least one insulating layer compounded together, a cavity is formed inside the housing, at least one of the insulating layers is located on one side of the cavity, and is located on the side of the cavity. A hollow structure is provided on the insulating layer, and the conductor layer is exposed on the hollow structure to form a contact portion;
    所述组装方法包括：The assembly method includes:
    将所述能量转换元件放置到所述腔体内；Placing the energy conversion element in the cavity;
    对所述壳体抽真空，利用大气压力挤压所述接触部，以使所述接触部与所述电连接部接触；以及Evacuating the housing and squeezing the contact portion with atmospheric pressure so that the contact portion is in contact with the electrical connection portion; and
    将所述壳体进行封闭。The shell is closed.
  12. 根据权利要求11所述的组装方法，其特征在于：在所述腔体内的气压高于大气压强时，所述电连接部与所述接触部分离。The assembly method according to claim 11, wherein the electrical connection part is separated from the contact part when the air pressure in the cavity is higher than the atmospheric pressure.
PCT/CN2020/102570 2019-12-30 2020-07-17 Energy storage device and method for assembling energy storage device WO2021135165A1 (en)

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