WO2022156787A1 - 电池组、制造电池组的方法及用电装置 - Google Patents

电池组、制造电池组的方法及用电装置 Download PDF

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Publication number
WO2022156787A1
WO2022156787A1 PCT/CN2022/073318 CN2022073318W WO2022156787A1 WO 2022156787 A1 WO2022156787 A1 WO 2022156787A1 CN 2022073318 W CN2022073318 W CN 2022073318W WO 2022156787 A1 WO2022156787 A1 WO 2022156787A1
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WO
WIPO (PCT)
Prior art keywords
battery pack
battery
insulating member
cell
resin layer
Prior art date
Application number
PCT/CN2022/073318
Other languages
English (en)
French (fr)
Inventor
袁宏伟
童衍辰
王慎波
Original Assignee
东莞新能安科技有限公司
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 东莞新能安科技有限公司 filed Critical 东莞新能安科技有限公司
Priority to CN202280006294.1A priority Critical patent/CN116250133A/zh
Priority to EP22742266.4A priority patent/EP4283771A1/en
Priority to JP2023544303A priority patent/JP2024505848A/ja
Publication of WO2022156787A1 publication Critical patent/WO2022156787A1/zh
Priority to US18/355,708 priority patent/US20230361421A1/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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
    • H01M50/367—Internal gas exhaust passages forming part of the battery cover or case; Double cover vent systems
    • 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
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/271—Lids or covers for the racks or secondary casings
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • 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
    • H01M50/543—Terminals
    • H01M50/562—Terminals characterised by the 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
    • H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
    • 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
    • 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 technical field of battery manufacturing, and in particular, to a battery pack, a method for manufacturing a battery pack, and an electrical device.
  • the internal cells When the existing soft-packed lithium battery is used for a long time or abnormal conditions occur, the internal cells will generate gas and the phenomenon of cell expansion will occur. When the expansion of the cells reaches a certain level, the cells will explode. If the expansion of the battery cannot be controlled in time, it will lead to a series of safety hazards during the use of the battery.
  • the embodiments of the present application provide a battery pack, including a cover plate, a battery core module, a second resin layer and a battery pack casing.
  • the battery core module is accommodated in the battery pack casing and fixed by the second resin layer.
  • the board is fixed on the battery pack casing, the battery core module includes a plurality of battery cells, the plurality of battery cells are stacked along the second direction, and the battery cores include opposite first ends and second ends along the first direction, and the battery cells close to the cover plate.
  • the core is a first cell, and the first direction is perpendicular to the second direction.
  • the battery pack also includes an insulating assembly, the insulating assembly is arranged at the second ends of the at least two cells, the insulating assembly and the second ends of the at least two cells form a first space, and the first space and the space between the at least two cells are formed.
  • the gap is connected; the insulating component closes one side of the first space, and one side of the first space is away from the battery core along the opposite direction of the first direction, the insulating component and the first space form an exhaust channel, and the exhaust channel communicates with the outside of the battery pack.
  • This kind of battery pack is provided with insulating components, on the one hand, the second end of the battery cell is easy to move, which improves the accuracy of detecting the expansion degree of the battery core module, on the other hand, the amount of the second resin layer is reduced, and the battery pack is reduced. the cost of.
  • the battery pack includes a first resin layer, the first resin layer is disposed on the second ends of the at least two battery cells, and the first resin layer is adhered to the insulating component and the second ends of the at least two battery cells. catch.
  • the amount of the second resin layer can be reduced, so that the battery core module can be fixed and the cost of the battery pack can be reduced.
  • the insulating assembly includes a second insulating member and a third insulating member, the second insulating member is provided at the second ends of the at least two battery cells, the second insulating member is provided with a third through hole, and the third insulating member is provided with a third through hole.
  • the through hole communicates with the gap between the at least two battery cells, the third insulating member closes one side of the third through hole, and one side of the third through hole is away from the battery core along the opposite direction of the first direction.
  • the battery pack can further reduce the amount of the second resin layer and reduce the cost of the battery pack.
  • the second insulating member covers the first resin layer, the surface of the second insulating member close to the first resin layer is provided with a bonding structure, and the second insulating member is bonded by the bonding structure. connected to the battery.
  • Such a battery pack can enable the second insulating member to be bonded to the battery cell through the bonding structure.
  • the second insulating member is bonded to the second end of the battery core, and the first resin layer is disposed on the edge of the third through hole.
  • the battery pack can reduce the amount of the first resin layer and reduce the cost of the battery pack.
  • the battery pack includes a first insulating member, and the first insulating member is arranged between at least two cells; an opening is provided on the first insulating member at a position close to the second end of the cell; the opening Connect the first space.
  • This kind of battery pack can provide deformation space for the cells by providing the first insulating member, so as to reduce the direct extrusion of two adjacent cells, or the extrusion of the cells and the cover plate or the battery pack casing, resulting in the cover plate or the battery pack being squeezed. rupture of the shell.
  • the opening By arranging the opening to communicate with the first space, the purpose of exhausting can be achieved.
  • the second insulating member includes a first body, and the first body is provided with a third through hole.
  • the first body is provided with a third through hole, and the third through hole can communicate with the gaps existing between the plurality of cells and the first insulating member, so as to achieve the purpose of exhausting gas.
  • the cover plate includes a first through hole
  • the second insulating member further includes a first portion, and at least part of the first portion is located in the first through hole.
  • the first through hole is provided, so that part of the structure of the battery module can be protruded from the first through hole, and then connected to the external structure (such as a circuit board) provided on the cover plate.
  • the first portion is at least partially located in the first through hole, so that the second insulating member can be connected to the external structure.
  • the first portion extends out of the cover plate through the first through hole.
  • the first part of the battery pack extends out of the cover plate through the first through hole, so as to facilitate the connection of the second insulating member to the external structure.
  • the third insulating member is provided with an exhaust slot, and the exhaust slot communicates with the third through hole.
  • an exhaust channel is formed by arranging an exhaust slot and making the exhaust slot communicate with the second through hole, and the gas inside the battery pack can be discharged from the exhaust slot.
  • the third insulating member includes a second body and a second part, the second body closes the third through hole, the second part is connected to the first part, and at least part of the second part is located in the first through hole .
  • the second part in the battery pack plays a role of supporting and fixing the first part, and the second part is at least partially located in the first through hole, so that the third insulating member can be connected to the external structure.
  • the second portion extends out of the cover plate through the first through hole.
  • the second part of the battery pack extends out of the cover plate through the first through hole, so as to facilitate the connection between the third insulating member and the external structure.
  • the third insulating member is provided with a second bonding area, the second bonding area is provided with a bonding structure, and the third insulating member is bonded and connected to the second insulating member through the bonding structure.
  • the bonding area is provided, so that the second insulating member and the third insulating member can be connected through the bonding structure of the bonding area.
  • the second insulating member and the third insulating member are integrally formed, and an exhaust slot is provided, and the exhaust slot communicates with the third through hole.
  • the second insulating member and the third insulating member of the battery pack are integrally formed, the mold can be opened, and the processing difficulty is reduced.
  • the second insulating member and the third insulating member can be integrally formed, and an exhaust slot is provided and communicated with the third through hole to form an exhaust channel, and the gas inside the battery pack can be discharged from the exhaust slot.
  • the first insulating member includes foam.
  • the foam in the battery pack can provide deformation space for the cells, reducing the direct extrusion of two adjacent cells, or the extrusion of the cells and the cover plate or the battery pack casing, resulting in the rupture of the cover plate or the battery pack casing. .
  • the first insulating member is provided with a second through hole, and the second through hole provides an expansion space for the cell.
  • the cell includes an electrode assembly, a cell case and a metal part, the electrode assembly is accommodated in the cell case, and the metal part is connected to the electrode assembly and extends out from the cell case; Viewed from the opposite direction, the projected area of the first insulating member on the cell is greater than or equal to the projected area of the electrode assembly.
  • the size of the first insulating member is set so that when the stacked cells are filled with the second resin layer, the second resin layer enters between the two adjacent cells from the side of the cell, reducing the first Insulators appear to be unable to be compressed.
  • the projected area of the first insulating member on the cell is smaller than or equal to the projected area of the cell housing.
  • the size of the first insulating member is set in this way, it is easier to assemble the battery cell module into the battery pack casing, and the situation of difficult and easy assembly is reduced.
  • the second resin layer includes potting glue, and the second resin layer adheres and fixes the battery core module and the battery pack casing together.
  • the second resin layer of the battery pack is a potting glue, and the potting glue can perform functions such as bonding, sealing, potting and coating protection of the components.
  • the first resin layer is formed by placing the liquid resin on the second end of the cell and then fixing it.
  • the first resin layer of the battery pack is liquid, which is convenient for setting according to the actual situation.
  • Such a battery pack enables gas to pass through the gap existing between the first insulating member and the battery cell, so that the first insulating member can exhaust the battery cell.
  • At least part of the insulating component is provided on the second resin layer.
  • the insulating component in the battery pack can be connected to the battery core module through the second resin layer.
  • a method of manufacturing a battery pack comprising the steps of:
  • a plurality of cells are arranged in the battery pack casing, a first insulating member is arranged between at least two cells, and a gap is arranged between at least two cells;
  • An insulating component is provided at the second ends of the at least two battery cells, the insulating component and the second ends of the at least two battery cores form a first space, and the first space communicates with the gap between the at least two battery cores;
  • the insulating component closes one side of the first space, and one side of the first space is away from the battery core along the opposite direction of the first direction, the insulating component and the first space form an exhaust channel, and the exhaust channel communicates with the outside of the battery pack;
  • the second resin layer is poured into the casing of the battery pack after disposing the insulating assembly.
  • This method of manufacturing a battery pack can manufacture the above-mentioned battery pack.
  • this kind of battery pack makes the second end of the battery cell easy to move, improving the accuracy of detecting the expansion degree of the battery cell module, on the other hand, reducing the number of first The amount of the two resin layers reduces the cost required for the battery pack.
  • the injection method of the second resin layer may be glue injection or injection molding.
  • the method for manufacturing the battery pack adopts the method of pouring glue or injection molding for pouring, and the operation is simple.
  • An electrical device includes a main body and any one of the above-mentioned battery packs, wherein the battery pack is arranged on the main body.
  • this kind of electric device can improve its own safety performance.
  • FIG. 1 is a schematic three-dimensional structure diagram of a battery pack in an embodiment of the present application.
  • FIG. 2 is an exploded schematic view of the battery pack shown in FIG. 1 .
  • FIG. 3 is a schematic three-dimensional structural diagram of the cover plate shown in FIG. 2 from another perspective.
  • FIG. 4 is an exploded schematic view of a cell module in the battery pack shown in FIG. 2 .
  • FIG. 5 is an exploded schematic view of another embodiment of the cell module shown in FIG. 2 .
  • FIG. 6 is an exploded schematic diagram of a cell module in a battery pack according to another embodiment of the present application.
  • FIG. 7 is a schematic three-dimensional structural diagram of a cell in the cell module shown in FIG. 4 .
  • FIG. 8 is an exploded schematic view of the cell shown in FIG. 7 .
  • FIG. 9 is a schematic three-dimensional structural diagram of the bracket in the battery pack shown in FIG. 4 from another perspective.
  • FIG. 10 is a schematic three-dimensional structural diagram of a battery pack bracket from another perspective in another embodiment of the present application.
  • FIG. 11 is a schematic cross-sectional view taken along line M-M of the battery pack shown in FIG. 1 after removing the cover.
  • FIG. 12 is an exploded schematic view of the detection element in the cell module shown in FIG. 4 .
  • FIG. 13 is an exploded schematic diagram of a battery pack in another embodiment of the present application.
  • FIG. 14 is a schematic three-dimensional structural diagram of the first insulating member shown in FIG. 5 .
  • FIG. 15 is a schematic top view of the connection between the first insulating member and the cell shown in FIG. 14 .
  • FIG. 16 is a schematic side view of the stack of the first exhaust member and the cell shown in FIG. 14 .
  • FIG. 17 is a schematic diagram illustrating that the stacked battery cells and the first exhaust member shown in FIG. 16 are provided with a first resin layer.
  • FIG. 18 is a schematic three-dimensional structural diagram of the second insulating member shown in FIG. 5 .
  • FIG. 19 is a schematic three-dimensional structural diagram of the third insulating member shown in FIG. 5 .
  • FIG. 20 is a schematic cross-sectional view of the cell module in the battery pack shown in FIG. 2 along the N-N line.
  • FIG. 21 is a schematic top view of the connection between the first exhaust member and the cell in another embodiment of the present application.
  • FIG. 22 is an exploded schematic diagram of a cell module in a battery pack according to another embodiment of the present application.
  • Electrode assembly 211
  • the first inspection department 231 The first inspection department 231
  • the second detection department 232 The second detection department 232
  • the first resin layer 262 is the first resin layer 262
  • the second resin layer 30 is the second resin layer 30
  • a component when a component is considered to be “connected” to another component, it can be directly connected to another component or there may be an intervening component at the same time. When a component is considered to be “set on” another component, it may be located directly on the other component or may co-exist with an intervening component.
  • the terms “top,” “bottom,” “top,” “bottom,” “left,” “right,” “front,” “back,” and similar expressions are used herein for illustrative purposes only.
  • the embodiments of the present application provide a battery pack, including a cover plate, a battery core module, a second resin layer and a battery pack casing.
  • the battery core module is accommodated in the battery pack casing and fixed by the second resin layer.
  • the board is fixed on the battery pack casing, the battery core module includes a plurality of battery cells, the plurality of battery cells are stacked along the second direction, and the battery cores include opposite first ends and second ends along the first direction, and the battery cells close to the cover plate.
  • the core is a first cell, the first direction is perpendicular to the second direction
  • the battery pack further includes an insulating component, the insulating component is arranged at the second ends of the at least two battery cells, and the insulating component and the second ends of the at least two battery cells are formed
  • the first space, the first space is in communication with the gap between the at least two cells; the insulating assembly closes one side of the first space, and one side of the first space is away from the cells along the opposite direction of the first direction, and the insulating assembly and the first space are separated.
  • a space forms an exhaust passage, and the exhaust passage communicates with the outside of the battery pack.
  • an embodiment of the present application provides a battery pack 100 , including a cover plate 10 , a cell module 20 , a second resin layer 30 and a battery pack case 40 , the cell module 20 and the first Two resin layers 30 are disposed in the battery pack case 40 , the second resin layer 30 fixes the cell module 20 in the battery pack case 40 , and the cover plate 10 is fixed to the battery pack case 40 by fasteners, such as screws , used to cover the cell module 20 together with the battery pack casing 40 to protect the cell module 20 .
  • the second resin layer 30 is formed by injecting resin into the battery case 40 and then being fixed.
  • the second resin layer 30 includes a potting compound.
  • the structure of the battery pack 100 will be described with reference to the X, Y, and Z coordinate axes, wherein the X, Y, and Z coordinate axes are perpendicular to each other.
  • the cover plate 10 is disposed on the battery pack casing 40 along the Z-axis direction. Specifically, the battery pack casing 40 and the cover plate 10 are sequentially disposed along the Z-axis direction.
  • the cover plate 10 includes a plate body 11, and the plate body 11 is substantially rectangular. When the cover plate 10 is disposed on the battery pack casing 40 , the plate body 11 is disposed on the upper surface of the cell module 20 .
  • the cover plate 10 further includes a protruding portion 12 , and the protruding portion 12 is provided on the side of the plate body 11 close to the cell module 20 , so that the cover plate 10 can better communicate with the battery through the protruding portion 12 .
  • the cell modules 20 are in contact.
  • the cover plate 10 further includes an escape opening 13 , and a part of the structure of the cell module 20 can extend out of the battery pack casing 40 from the escape opening 13 to be exposed between the cover plate 10 and the battery pack casing 40 .
  • the cell module 20 can be communicated with the external environment, so that the gas generated by the cell module 20 can be discharged.
  • the cover plate 10 further includes a first through hole 14 .
  • the first through hole 14 and the escape port 13 are disposed at opposite ends of the plate body 11 along the first direction. Part of the structure of the cell module 20 can be protruded from the first through hole 14 and then connected to an external structure (such as a circuit board) provided on the cover plate 10 .
  • the first direction is along the X-axis direction.
  • the shape of the plate body 11 is not limited to this, and in battery packs 100 of different shapes, the shape of the plate body 11 can be changed according to different battery packs 100 .
  • the cell module 20 includes a plurality of stacked cells 21 , a bracket 22 and a detection member 23 , and the plurality of cells 21 are stacked along a second direction.
  • the second direction is along the Z axis.
  • the second direction is the thickness direction of the cell 21 .
  • the bracket 22 is arranged above the battery cell 21.
  • the bracket 22 is arranged above the battery cell 21 close to the cover plate 10.
  • the battery core 21 close to the cover plate 10 is defined as the first battery
  • the core M the bracket 22 is located between the cover plate 10 and the first battery core M.
  • the detection piece 23 is arranged on the bracket 22 , and further, the detection piece 23 is arranged between the cover plate 10 and the bracket 22 for detecting the expansion degree of the cell module 20 .
  • the expansion degree of the cell module 20 is greater than the safe expansion It can be detected by the detector 23 , thereby improving the safety of the battery pack 100 .
  • the cell 21 includes an electrode assembly 211 , a cell housing 212 and a metal portion 213 .
  • the cell housing 212 is provided with a accommodating portion 2121 , and the electrode assembly 211 is accommodated in the cell.
  • the accommodating part 2121 of the casing 212 and the metal part 213 are connected to the electrode assembly 211 and extend from the battery casing 212 .
  • the first cell M includes a first surface O and a second surface P which are oppositely disposed.
  • the cell case 212 may have an insulating layer, a metal layer and an adhesive layer.
  • the cell case 212 is bonded to the electrode assembly 211 through the adhesive layer, thereby realizing the connection with the electrode assembly 211.
  • the metal layer is located between the insulating layer and the adhesive layer. Between the connecting layers, the strength of the cell shell 212 can be enhanced, and the insulating layer is far away from the electrode assembly 211, which can prevent external soda and water from penetrating into the inside thereof.
  • the metal part 213 is used to connect with the external structure, so that the battery cell 21 can communicate with the external structure.
  • the metal parts 213 of two adjacent cells 21 are connected to realize electrical communication between the plurality of cells 21 .
  • the metal part 213 is a tab, the tab is divided into a positive tab and a negative tab, and the positive and negative tabs of the two adjacent cells 21 are connected.
  • the battery cells 21 are arranged along the first direction, and the metal parts 213 extend from the battery core housing 212 along the first direction.
  • the battery cell 21 includes a first end A and a second end B disposed opposite to each other.
  • the metal parts 213 include two, and the two metal parts 213 extend from the first end A of the cell 21 out of the cell housing 212 .
  • one of the two metal parts 213 may be
  • the cell case 212 extends from the first end A of the cell 21
  • another metal portion 213 may extend from the second end B of the cell 21 to the cell case 212 .
  • the battery cell 21 includes a first surface 214 and a second surface 215, and the first surface 214 and the second surface 215 are not on the same plane.
  • the first surface 214 is closer to the first end A than the second surface 215 .
  • the second surface 215 can be used as a reference when the cell module 20 is provided with other components, thereby making the overall structure of the cell module 20 more flat, and facilitating the assembly of the cell module 20 to the battery pack case body 40.
  • the bracket 22 is erected above the first cell M, the bracket 22 includes a main body 221 , and the main body 221 is substantially a rectangular plate-like structure.
  • the cores 21 extend approximately the same distance.
  • the third direction is along the Y-axis direction.
  • the meaning of "approximately” is not absolute equivalent, and there may be a deviation of +/-5mm to +/-10mm between the two.
  • the second resin layer 30 flows into the first gap , so as to strengthen the fixing strength between the main body 221 and the first cell M.
  • the bracket 22 further includes a plurality of protruding portions 222 , the plurality of protruding portions 222 are spaced apart on a side of the main body 221 close to the first cell M, and the protruding portions 222 extend toward the first cell M by a first distance , so that the convex part 222 extends out of the main body 221 , the convex part 222 and the main body 221 form a groove 223 , and the groove 223 communicates with the first gap.
  • the strength of the main body 221 can be increased by arranging the protruding portion 222 . Meanwhile, please refer to FIG.
  • the second resin layer 30 can be disposed between the main body 221 and the cell 21 .
  • the groove 223 is provided with the second resin layer 30 , so that the stability between the bracket 22 and the battery core 21 is stronger.
  • the bracket 22 further includes a fixing portion 224 , and the fixing portion 224 is connected to the side of the main body 221 along the third direction.
  • the fixing portions 224 include two, and the two fixing portions 224 are connected to opposite sides of the main body 221 .
  • the fixing portion 224 and the main body 221 are vertically arranged. In other embodiments, the fixing portion 224 and the main body 221 can be arranged at other angles.
  • the bracket 22 is fixed in the battery pack casing 40 by the fixing portion 224 , so as to play a role in pre-positioning the bracket 22 and reduce the flow of the second resin layer 30 during the process of gluing the battery module 20 .
  • the carriage 22 moves.
  • the fixing portion 224 is provided with a fixing hole 225 , and the fixing portion 224 is fastened to the inner wall of the battery pack case 40 through the fixing hole 225 to realize the pre-positioning of the bracket 22 .
  • the fixing portion 224 and the battery pack casing 40 are snap-connected, so that when the battery cell 21 expands, the bracket 22 can be moved more conveniently.
  • the second resin layer 30 fixes the cell module 20
  • there are fewer second resin layers 30 at the fixing holes 225 and the degree of fixation is low, which does not affect the movement of the bracket 22 .
  • the number and arrangement positions of the fixing portions 224 are not limited to this.
  • the number of fixing parts 224 may also be six or eight, or the like.
  • the shape of the main body 221 is also not limited to this.
  • the cell module 20 includes a bracket 22, and the bracket 22 is disposed above the first cell M along the second direction.
  • the first surface O of the first cell M may be uneven.
  • the bracket 22 may also be disposed between two adjacent cells 21 , and is not limited to being disposed above the first cell M as described above.
  • a bracket 22 is further provided.
  • the bracket 22 includes a main body 221 , a convex portion 222 and a fixing portion 224 .
  • the convex portion 222 is disposed on the surface of the main body 221 close to the first battery core M, so that there is a first gap between the main body 221 and the first battery core M, and the second resin layer 30 can be disposed between the main body 221 and the first battery core M. between.
  • the structure of the fixing portion 224 is the same as that of the fixing portion 224 in the above-mentioned embodiment. Here, details are not repeated here.
  • the detecting element 23 is used to detect the expansion degree of the battery cell module 20, and transmit the detected information.
  • the detection part 23 includes a first detection part 231 , a second detection part 232 and a guide wire 234 .
  • the guide wire 234 is connected to the first detection part 231 , and when the first detection part 231 and the second detection part 232 are connected, information is transmitted through the guide wire 234 .
  • both the first detection part 231 and the second detection part 232 include a thin film sheet, and conductive silver paste is arranged on the thin film sheet, and the conductive silver paste can be used as the first detection part 231 and the second detection part 232.
  • Conductive part In an embodiment, both the first detection part 231 and the second detection part 232 include a thin film sheet, and conductive silver paste is arranged on the thin film sheet, and the conductive silver paste can be used as the first detection part 231 and the second detection part 232. Conductive part.
  • the detection part 23 also includes a first bonding area 233, the first bonding area 233 is set at the part of the first detection part 231 close to the edge, and a structure such as glue or double-sided tape is coated at this position, so that the first detection part 231 is The part 231 and the second detection part 232 can be connected by the first bonding area 233 .
  • the first bonding area 233 is coated with glue, so that a gap is formed between the first detection part 231 and the second detection part 232 except for the first bonding area 233, for example, a gap of 0.2 mm is formed.
  • the first cell M pushes the second resin layer 30
  • the second resin layer 30 pushes the bracket 22
  • the bracket 22 drives the first detection part 231 to approach the second detection part 232 , until the two are connected.
  • the connected first detection part 231 and the conductive silver paste on the second detection part 232 are in contact to form a conductive loop, and are connected to the external structure through the lead wire 234, so as to transmit the first detection part 231 and the second detection part.
  • 232 Connectivity information
  • the cover plate 10 is provided with a raised portion 12 .
  • the location of the raised portion 12 corresponds to the detection element 23 .
  • the protruding portion 12 can abut against the second detecting portion 232 , so that the connection between the first detecting portion 231 and the second detecting portion 232 is easier, and the accuracy of the detecting element 23 is improved.
  • the resistance of the lead wire 234 can be considered to be infinite, and when the battery cell 21 abnormally expands, the first detection part can be 231 is connected with the second detection part 232 to form a complete loop, and the resistance of the lead wire 234 drops rapidly, so that it can respond and detect in time, and the safety of the battery pack 100 is improved.
  • the detection form of the detection element 23 is not limited to the case of the detection resistance.
  • the first detection part 231 and the second detection part 232 can also respond in time after the first detection part 231 and the second detection part 232 are turned on, or other detection forms with equivalent functions or effects are applicable.
  • the detection member 23 and the bracket 22 may also be disposed between two adjacent battery cells 21 .
  • the degree of expansion of the battery cells 21 can be set.
  • the degree of expansion of the battery cells 21 may be greater than 15% as a critical value. It can be understood that a larger expansion threshold value can also be selected, so that the probability of false triggering can be reduced during the use of the battery pack 100 .
  • the normal expansion degree of the battery cell 21 is 0-20%.
  • the detection member further includes a support portion 235 .
  • the first detection portion 231 and the second detection portion 232 move along the second direction.
  • the guide wire 234 will be pulled. Since the second resin layer 30 fixes the guide wire 234 , the first detection part 231 and the second detection part 232 may break the guide wire 234 during the movement.
  • a support portion 235 is provided on the side of the guide wire 234 close to the bracket 22, and the support portion 235 is located between the guide wire 234 and the bracket 22 to increase the height of the guide wire 234 in the second direction.
  • the guide wire 234 Raise the guide wire 234 a little, when the cell module 20 expands, the first detection part 231 and the second detection part 232 move, and the guide wire 234 can move together to reduce the occurrence of the guide wire 234 being pulled off.
  • the cell module 20 disconnects the electrical conduction between the cells 21 , thereby reducing the continued use of the cells 21 .
  • the battery cell module 20 can be fused to form an open circuit of the battery pack 100, and the battery pack 100 can no longer be used.
  • the detection member 23 in order to make the detection member 23 easier to detect the expansion of the battery cell 21 , the detection member 23 is disposed close to the second end B of the battery cell 21 .
  • the distance from the second end B to the first end A is L
  • the distance between the detecting element 23 and the second end B along the first direction X is 1/4-1/3L.
  • the position of the bracket 22 on the first cell M can be adjusted according to the position of the detector 23 .
  • the first end A of the battery cell 21 is provided with a metal portion 213, which needs to be connected to an external structure to achieve electrical conduction of the battery cell 21, and the second end B is not connected to any external structure.
  • the second resin layer 30 fixes the cell module 20 in the battery pack case 40 , the metal part 213 is connected with the external structure, the first end A is fixed by the second resin layer 30 , and the second resin layer 30 is arranged on the second end B
  • the layer 30 is less than the second resin layer 30 provided at the first end A, so that the bonding strength of the second end B is weaker than that of the first end A, and the mechanical strength of the first end A is greater than that of the second end B, The second end B is thus more easily expanded relative to the first end A.
  • an insulating component 26 may be provided at the second end B to reduce the shaking of the second end B.
  • a second resin layer 30 is provided on the surface of the battery core module 20.
  • the position of the second end B is partially filled with glue, so that the second end B Easier to move.
  • the detection member 23 is disposed near the second end B, which makes it easier to detect the degree of expansion of the cell module 20 .
  • the second resin layer 30 fixes the cell module 20
  • the second resin layer 30 is disposed between the bracket 22 and the first cell M.
  • the second resin layer 30 may also be disposed On the surface of the bracket 22 facing away from the first battery core M, the first surface O of the first battery core M is also fully provided with the second resin layer 30 , so that the battery core 21 is pushed through the second resin layer 30 during the expansion process
  • the overall force of the bracket 22 is more uniform, the transmission of the thrust force is also more uniform, and the detection of the detection element 23 is more accurate.
  • the detector 23 In addition to the bracket 22 being fixed by the second resin layer 30 , the detector 23 needs to be exposed outside the second resin layer 30 to reduce the occurrence of the second resin layer 30 fixing the detector 23 , so that the first detector 231 of the detector 23 and the second detector 23 are fixed.
  • the second detection part 232 cannot move.
  • the detection part 23 includes a first detection part 231 , a second detection part 232 and a connection part 236 .
  • the first detection part 236 When the part 231 is arranged on the bracket 22 , the first detection part 231 is arranged on the surface of the bracket 22 close to the cover plate 10 , and the second detection part 232 is arranged on the surface of the cover plate 10 close to the cell 21 .
  • the first detection part 231 When the battery module 20 is not provided with the bracket 22 , the first detection part 231 is arranged on the surface of the first battery M close to the cover 10 , and the second detection part 232 is arranged on the surface of the cover 10 close to the first battery M superior.
  • the second detection part 232 is provided with a connection part 236 , the connection part 236 extends from the second detection part 232 toward the first detection part 231 , the connection part 236 is movable relative to the second detection part 232 and can be connected with the second detection part 232 A state of electrical conduction is formed between them, and a guide wire 234 is provided on the second detection part 232 , and information is transmitted through the guide wire 234 .
  • the battery core 21 When the battery cell 21 is not expanded under normal conditions, there is a gap between the first detection part 231 and the second detection part 232.
  • the battery core 21 supports the first detection part 231, or supports the first detection part 231 through the bracket 22 to connect with the connection part 236 on the second detection part 232, the first detection part 231 After connecting with the connection part 236 , the first detection part 231 pushes the connection part 236 to move, so that the connection part 236 and the second detection part 232 are connected, and the second detection part 232 forms an electrical conduction state inside, and the conduction is conducted through the guide wire 234 The information is passed out to achieve the purpose of detection.
  • the first detection portion 231 is an insulating sheet
  • the second detection portion 232 is a travel switch
  • the connecting portion 236 is a contact on the travel switch.
  • the form of the detection member 23 is not limited to the above-mentioned film detection or travel switch detection.
  • the detection member 23 can also be replaced by, for example, a detection form of a metal sheet.
  • the cell module 20 further includes a support member 24 , and the support member 24 is disposed at the connection position of the metal portions 213 of two adjacent cells 21 .
  • a receiving groove (not shown in the figure) is formed between the metal parts 213 , and the support 24 is disposed in the receiving groove.
  • the supporting member 24 is arranged in the receiving groove, which can support and fix the metal part 213.
  • the supporting member 24 can separate the unconnected metal parts 213 between the two adjacent cells 21, so as to reduce the contact between the metal parts 213. A short circuit occurs between the cells 21 .
  • the support 24 is foam. It can be understood that, in other embodiments, the support member 24 can also be replaced with other structures with equivalent functions or functions.
  • the cell module 20 further includes an adapter assembly 25 , and the adapter assembly 25 is disposed at the first end A of the battery cell 21 for connecting the metal portion 213 and the guide wire 234, so that the metal part 213 and the lead wire 234 can be connected with the external structure, so as to realize the monitoring of the data such as the internal voltage of the battery cell 21, and after receiving the information transmitted by the lead wire 234, realize the protection mechanism for the battery cell 21. start up.
  • the adapter assembly 25 includes an adapter plate 251 , an adapter member 252 and a limiting member 253 .
  • the adapter plate 251 is provided at the first end A of the battery core 21 .
  • the guide wire 234 is detected from the first detection portion 231 . After extending, it extends along the side of the battery core 21 toward the direction of the adapter plate 251 and is electrically connected to the adapter plate 251 .
  • the “side edge” of the cell 21 refers to a position between the first end A and the second end B of the cell 21 near the edge.
  • the adapter 252 is disposed on the adapter plate 251 and is electrically connected to the adapter plate 251 , and the limiting element 253 is used to limit the adapter 252 disposed on the adapter plate 251 to reduce the movement of the adapter 252 .
  • the adapter board 251 is a circuit board.
  • the adapter 252 is a copper bar, further, the copper bar can be divided into a total positive copper bar and a total negative copper bar, the total positive copper bar and the positive electrode on the battery core 21 away from the cover plate 10 The ears are connected, the total negative copper bar is connected to the negative ear on the cell 21 close to the cover plate 10 , and the limiting member 253 limits the total positive copper bar.
  • the limiting member 253 is a limiting foam.
  • the positive and negative tabs connecting the total positive copper bar and the total negative copper bar to the cell 21 can be replaced.
  • the limiting member 253 can also be replaced with a structure having equivalent functions or functions.
  • an insulating component 26 may be provided at the second end B of the battery cell 21 , on the one hand, so that the The second end B of the battery cell 21 is easy to move, which improves the accuracy of detecting the expansion degree of the battery cell module 20 , and on the other hand reduces the cost of the battery pack 100 .
  • the insulating component 26 and the second end B of the cell 21 form a first space 265, the first space 265 is in communication with the gap between the at least two cells 21, and the insulating component 26 closes one side of the first space 265, the first space One side of 265 is away from the battery cell 21 in a direction opposite to the first direction.
  • the insulating assembly 26 and the first space 265 form an exhaust passage, which communicates with the atmosphere outside the battery pack 100.
  • the battery pack 100 includes a first resin layer 262 .
  • the first resin layer 262 is disposed at the second end B of the cell 21 .
  • the first resin layer 262 has a hollow rectangular shape.
  • the two resin layers 30 enter the hollow portion thereof, and the insulating component 26 is disposed on the surface of the first resin layer 262 to close the hollow portion of the first resin layer 262 .
  • This arrangement reduces the amount of the first resin layer 262 and the amount of the second resin layer 30 , so that the battery module 20 can be fixed while reducing the cost of the battery pack 100 .
  • the insulating component 26 may be used to discharge the gas generated by the battery cells 21 or the gas generated by other structures inside the battery pack 100 .
  • An exhaust channel is formed between the first resin layer 262 and the insulating component 26 , and the exhaust channel communicates with the outside of the battery pack 100 , so as to achieve the purpose of exhausting the internal structure of the battery pack 100 .
  • the battery pack 100 includes a first insulating member 261 , the first insulating member 261 is disposed between two adjacent cells 21 , and the first insulating member 261 is provided on two opposite surfaces of the first insulating member 261 , eg, double-sided. glue, so that the first insulating member 261 can be adhered to the surface of the cell 21, so that the adjacent cells 21 can be fixed two by two, so as to form a stable cell module 20, the first space 265 is formed at least in Between two adjacent cells 21 and the insulating component 26 .
  • the first insulating member 261 is foam.
  • the foam By arranging foam between two adjacent cells 21, if the cell 21 expands, the foam can provide a deformation space for the cell 21, reducing the direct extrusion of the two adjacent cells 21, or the cell 21 and the cover.
  • the plate 10 or the battery case 40 is squeezed, causing rupture of the cover plate 10 or the battery case 40 .
  • first insulating member 261 can also be replaced with other structures having equivalent functions or functions.
  • Double-sided tape can also be replaced with other forms of adhesive, such as liquid glue.
  • the first insulating member 261 is provided with a second through hole 2611 .
  • the second through hole 2611 is substantially rectangular, so that the shape of the second through hole 2611 is substantially the same as the shape of the battery cell 21 , so that more Good for cell 21.
  • the battery cell 21 can have more space for expansion at the position of the second through hole 2611, for example, the battery cell 21 can be set through the space provided by the second through hole 2611 Expansion range.
  • the amount of the first insulating member 261 can also be reduced, thereby reducing the cost of the battery pack 100 .
  • the weak point of the cell 21 is on the first surface O or the second surface P.
  • the "weak point” here refers to the position in the battery cell 21 that is more likely to be broken.
  • the projected area of the first insulating member 261 on the cell 21 is the minimum area of the electrode assembly 211 , and the maximum projected area is the electrical cell 21 .
  • the projected area of the first insulating member 261 on the cell 21 is set between the maximum projected area and the minimum projected area.
  • a portion of the first insulating member 261 near the second end B of the battery cell 21 is not provided with double-sided tape, so that the portion of the first insulating member 261 is not provided with double-sided tape.
  • the first insulating member 261 and the cell 21 are not bonded, so that gas can pass through the gap existing between the first insulating member 261 and the cell 21 .
  • the portion of the first insulating member 261 where the double-sided tape is not provided such as the portion shown by the dotted line in FIG. 15 .
  • a first insulating member 261 is disposed between the stacked cells 21 . Viewed in the opposite direction to the first direction, the end of the first insulating member 261 is at the position of the second end B of the cell 21 . The first surface 214 is flush. Placing the end of the first insulating member 261 flush with the second surface 215 can effectively reduce the entry of the second resin layer 30 between the cells 21 , which affects the normal expansion of the cells 21 , and facilitates the cells 21 and the battery pack case 40 . assembly between.
  • the Shore C hardness of the first insulating member 261 is in the range of 38°+/-5°.
  • the hardness of the first insulating member 261 is set within this range, on the one hand, it is convenient to compress the first insulating member 261 and reduce the occurrence of the first insulating member 261 being too hard.
  • the first insulating member 261 cannot be compressed; on the other hand, the size of the stacked cells 21 and the first insulating member 261 is easier to control, and the occurrence of deformation due to the small hardness of the first insulating member 261 is reduced.
  • the first insulating member 261 is made of an elastic closed-cell material, which can enable the first insulating member 261 to deform, provide a deformation space for the expansion of the battery core 21, and prevent glue penetration. It is effectively ensured that the second resin layer 30 cannot enter between two adjacent battery cells 21 .
  • the stacked cells 21 are provided with a first resin layer 262 at the position of the second end B.
  • the first resin layer 262 when viewed along the first direction, is approximately in the shape of a hollow rectangle.
  • a resin layer 262 is formed by placing the liquid resin on the second end B of the battery core 21 and then fixing it. Referring to FIG. 16 , at the second end B of the battery cell 21 , the distances between the first surface 214 and the second surface 215 and the first end A are different.
  • the first resin layer 262 By disposing the first resin layer 262 , the first surface 214 and the second surface The grooves (not shown) between 215 are filled, so as to reduce the flow of the second resin layer 30 to the first surface 214 and the second surface 215 during subsequent gluing, which affects the exhaust of the cell module 20 .
  • the configuration of the first resin layer 262 in a hollow rectangular shape is designed according to the stacked battery cells 21 . It can be understood that, in other embodiments, when the battery cells 21 are replaced with other stacked shapes, the shape of the first resin layer 262 also changes accordingly.
  • the insulating assembly 26 includes a second insulating member 263 and a third insulating member 264 .
  • the second insulating member 263 is disposed on the surface of the first resin layer 262 , and when viewed along the first direction, the second insulating member 263 covers the first resin layer 262 .
  • the surface of the second insulating member 263 close to the first resin layer 262 is provided with a bonding structure such as double-sided tape (not shown), so that the second insulating member 263 can be bonded to the cell 21 through the double-sided tape.
  • the second insulating member 263 includes a first body 2631, and the first body 2631 is also substantially rectangular.
  • the first body 2631 is provided with a third through hole 2632 , the third through hole 2632 is rectangular, and its length direction is along the second direction, so that the third through hole 2632 can connect with the plurality of cells 21 and the first insulating member 261 .
  • the gaps between them are connected to achieve the purpose of exhausting.
  • the second insulating member 263 further includes a first portion 2633, the first portion 2633 extends from the first body 2631 in the second direction.
  • the first portion 2633 is at least partially located at the first through hole 14 of the cover plate 10 .
  • the second insulating member 263 is foam. It can be understood that, in other embodiments, the second insulating member 263 can also be replaced with other structures having equivalent functions or functions.
  • the shape of the second insulating member 263 is not limited to this, and the shape of the second insulating member 263 can be replaced accordingly according to different conditions of stacking of the cells 21 .
  • the third insulating member 264 is disposed on the surface of the second insulating member 263 away from the first resin layer 262 , and the structures of the third insulating member 264 and the second insulating member 263 are substantially the same.
  • the third insulating member 264 includes a second body 2641 and a second portion 2642, the second portion 2642 extends from the second body 2641 in the second direction, and the second body 2641 and the second portion 2642 are respectively connected to the second body 2641 and the second portion 2642.
  • a main body 2631 corresponds to the first part 2633 , and the first part 2633 can play a supporting and fixing role to the second part 2642 .
  • the second body 2641 and the second part 2642 are provided with an exhaust groove 2643.
  • the exhaust groove 2643 communicates with the second through hole 2611 to form an exhaust channel, and the gas flows from Exhaust groove 2643 exhausts the outside of the battery pack.
  • the distance between the first part 2633 and the second part 2642 extending beyond the cover plate 10 in the second direction is greater than 2 mm, so as to reduce the entry of the second resin layer 30 into In the exhaust passage, there is a situation where the exhaust pressure cannot be discharged.
  • the depth of the depression of the exhaust groove 2643 in the direction opposite to the first direction is less than or equal to 0.2 mm, and the distance of the exhaust groove 2643 along the third direction is between 1 mm and 3 mm.
  • the air groove 2643 can play the role of dustproof, and reduce impurities such as dust to block the exhaust passage.
  • the second body 2641 is provided with a second bonding area 2644 , and the second bonding area 2644 is disposed at the edge of the second body 2641 .
  • the third insulating member 264 and the second insulating member 263 are connected by arranging a bonding structure such as double-sided tape (not shown) on the second bonding area 2644 .
  • the third insulating member 264 may be made of a polycarbonate (PC) material. It can be understood that the material of the third insulating member 264 is not limited to this, and in other embodiments, other structures with equivalent functions or functions may also be used.
  • PC polycarbonate
  • the second insulating member 263 and the third insulating member 264 can be integrally formed, and the exhaust groove 2643 is arranged between them, and the exhaust groove 2643 and the third insulating member 2643 can be formed together.
  • the through holes 2632 communicate with each other.
  • the cells 21 and the first insulating members 261 are spaced apart and stacked first, and then the first resin layer 262 is disposed on the second end B of the stacked cells 21 . until the first resin layer 262 is cured and fixed on the second end B of the cell 21 , then the second insulating member 263 is arranged on the first resin layer 262 , and finally the third insulating member 264 is arranged on the second insulating member 263 to complete the assembly between the insulating component 26 and the battery cell 21 .
  • an opening 2612 is provided on the first insulating member 261 near the second end B of the cell 21, and then the first insulating member 261 is bonded to the electrical cell 21. core 21 surface.
  • the second insulating member 263 is bonded to the second end B of the cell 21 , so that the opening 2612 communicates with the third through hole 2632 , that is, the opening 2612 communicates with the first space 265 .
  • the first resin layer 262 is then disposed along the edge of the third through hole 2632 .
  • the first resin layer 262 is as large as a frame-shaped structure, wherein “similar” means that it looks similar, but actually the first resin layer 262 having a thickness is provided at the edge of the third through hole 2632 , It can reduce the flow of the second resin layer 30 into the third through holes 2632 and affect the exhaust.
  • the third insulating member 264 is disposed on the second insulating member 263 , and the exhaust groove 2643 is communicated with the third through hole 2632 to form a complete exhaust passage, which is convenient for exhausting the cell module 20 .
  • the foam and the double-sided tape disposed on the foam will decompose to generate gas in a high temperature environment, and the second through hole 2611 on the first insulating member 261 reduces the number of times in the first insulating member 261.
  • the consumption of an insulating member 261 also reduces the generation of gas.
  • the gas generated by the foam and the double-sided tape on the foam is also discharged through the exhaust channel.
  • the battery pack 100 further includes a buffer member 27 , and the buffer member 27 is disposed on the side of the cell module 20 along the third direction.
  • the buffer member 27 is disposed on the guide wire 234 and located on the side of the cell module 20 . Setting the buffer 27 on the guide wire 234 can fix the guide wire 234 and reduce the movement of the guide wire 234 caused by the expansion of the battery cell 21 , which affects the accuracy of the information transmitted by the guide wire 234 . At the same time, it can also buffer the battery pack 20. When the battery pack 100 vibrates, the buffer member 27 can reduce the damage to the battery pack 21 caused by the direct collision between the battery pack 20 and the battery pack casing 40. Case.
  • the buffer member 27 is foam. It can be understood that, in other embodiments, the buffer member 27 can also be replaced with other structures having equivalent functions or functions.
  • the battery pack 100 further includes a rubber pad 28 , and the rubber pad 28 is disposed between the battery cell module 20 and the battery pack casing 40 along the second direction for protecting the battery cells 21 .
  • the battery cell module 20 is assembled in the battery pack casing 40 , the situation that the battery cells 21 hit the battery pack casing 40 to be deformed is reduced.
  • the rubber pad 28 is a silicone pad 28 . It can be understood that, in other embodiments, the rubber pad 28 can also be replaced with other structures having equivalent functions or functions, for example, foam is provided, which can also protect the battery cells 21 .
  • the battery pack 100 further includes a circuit board 29 .
  • the circuit board 29 is disposed on the surface of the cover plate 10 facing away from the cell module 20 , and the adapter 252 in the adapter assembly 25 is connected to the circuit board 29 .
  • the board 251 is connected to the circuit board 29 by wire connection or other connection means.
  • the circuit board 29 is a Battery Management System board (BMS board), which is used to control data such as voltage on the battery cell 21, and to control the battery cell 21 after receiving the information transmitted by the lead wire 234. The circuit responds in time to ensure the safety of the battery cell 21 .
  • BMS board Battery Management System board
  • the second resin layer 30 is disposed on the side of the cell 21 by means of infusion and then fixed and formed to fix a plurality of cells 21 .
  • the cell 21 encapsulates the electrode assembly 211 through the cell shell 212 .
  • the plurality of cells 21 are fixed by the second resin layer 30, that is, the position where there is a gap between the sides of the two adjacent cells 21 is filled with the second resin layer 30,
  • the second resin layer 30 is used to bond and fix the two adjacent battery cores 21 .
  • the side edge of the battery cell 21 can also be the peripheral position of the outer contour of the battery core 21 , so that the second resin layer 30 is more firm when fixing the battery core 21 .
  • the bracket 22 is assembled to the cell module 20, the second resin layer 30 is installed when the second resin layer 30 is not completely fixed.
  • the pouring method of the second resin layer 30 may be glue pouring or injection molding, for example, low pressure injection molding.
  • the second resin layer 30 is a potting glue, and the potting glue can perform functions such as bonding, sealing, potting and coating protection for the components.
  • the second resin layer 30 is epoxy resin potting glue. It can be understood that, in other embodiments, the second resin layer 30 can also be replaced with other types of potting glue.
  • the battery pack case 40 accommodates the cell module 20
  • the second resin layer 30 is disposed between the cell module 20 and the battery pack case 40
  • the second resin layer 30 is a potting glue
  • the potting glue is poured between the battery core module 20 and the battery pack casing 40 by pouring
  • the solid second resin layer 30 is formed after the potting glue is fixed.
  • the second resin layer 30 seals the battery core module. 20 and the battery pack casing 40 are bonded and fixed together to strengthen the structural strength of the battery pack 100 .
  • the cover plate 10 and the battery pack case 40 are fixedly connected. For example, fasteners, such as screws, are used to install the cover plate 10 on the battery pack case 40 so as to face the cell modules 20 disposed in the battery pack case 40 . to protect.
  • the battery pack casing 40 is roughly in the form of a hollow cuboid structure without an upper cover, and includes four side walls 41 and a bottom wall 42 .
  • the four side walls 41 and the bottom wall 42 enclose a receiving space 43
  • the battery module 20 is arranged in the receiving space 43 . in space 43.
  • the cover plate 10 and the battery pack case 40 cover the cell module 20 together, and the shape of the battery pack case 40 is set according to the plurality of cells 21 stacked along the second direction.
  • the insulating component 26 is disposed between the second end B of the cell 21 and the side wall 41 away from the metal portion 213 .
  • the shape of the battery pack case 40 is not limited to this.
  • the shape of the battery pack case 40 can be determined according to the shape of the cell module 20 . replace.
  • the fixing method of the cover plate 10 and the battery pack case 40 is not limited to this.
  • 40 The corresponding edge positions are coated with adhesive, and the two are fixed by the adhesive.
  • Embodiments of the present application further provide an electrical device (not shown), the electrical device includes a body and the battery pack 100 in any of the above embodiments, and the battery pack 100 is provided in the body.
  • the electrical device may be an electric vehicle, an electric bus, an electric vehicle, an energy storage device, an electric bicycle, a flying device, and the like.
  • the body is a vehicle body structure, and the battery pack 100 is arranged in the vehicle body structure for supplying power.
  • the electric device may also be a hand-held electric device, such as a vacuum cleaner, a lawn mower, and the like.
  • the embodiment of the present application provides a battery pack 100 and an electrical device.
  • the detection element 23 By setting the detection element 23 on the battery cell 21, it is used to detect whether the expansion degree of the battery cell module 20 exceeds the safe expansion range. After the expansion degree of the 20 exceeds the safe expansion range, the detection element 23 responds in time to protect the battery pack 100 and reduce the occurrence of safety problems.
  • an insulating component 26 is provided on the battery core module 20, and the exhaust passage formed by the insulating component 26 communicates with the external atmosphere, so that the gas generated inside the battery pack 100 can be discharged to the outside, balance the internal and external pressure of the battery pack 100, and solve the problem of air pressure. risks from imbalances.

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Abstract

一种电池组，包括盖板、电芯模组、第二树脂层和电池组壳体，电芯模组收容于电池组壳体内，并通过第二树脂层固定，盖板固定于电池组壳体，电芯模组包括多个电芯，多个电芯沿第二方向堆叠，电芯沿第一方向包括相对的第一端和第二端，靠近盖板的电芯为第一电芯。电池组还包括绝缘组件，绝缘组件设于至少两个电芯的第二端，绝缘组件和至少两个电芯的第二端形成第一空间，第一空间和至少两个电芯之间的间隙连通，绝缘组件封闭第一空间的一侧，第一空间的一侧沿第一方向的相反方向远离电芯，绝缘组件和第一空间形成排气通道，排气通道与电池组外部连通。还涉及制造电池组的方法及用电装置，通过采用上述的电池组，可提高其自身的安全性能。

Description

电池组、制造电池组的方法及用电装置
本申请要求申请日为2021年01月21日、申请号为202110082287.7的中国专利申请的优先权。
技术领域
本申请涉及电池制造技术领域，尤其涉及一种电池组、制造电池组的方法及用电装置。
背景技术
现有的软包锂电池在长时间的正常使用或发生异常情况时，内部的电芯会产生气体而出现电芯膨胀的现象，当电芯的膨胀量到达一定的程度后会导致电芯爆炸的情况发生，若不能及时控制电芯的膨胀，会导致电池在使用过程中出现以一系列的安全隐患。
发明内容
有鉴于此，有必要提供一种电池组及用电装置，可改善电池的膨胀问题，提升电池使用的安全性。
本申请的实施例提供一种电池组，包括盖板、电芯模组、第二树脂层和电池组壳体，电芯模组收容于电池组壳体内，并通过第二树脂层固定，盖板固定于电池组壳体，电芯模组包括多个电芯，多个电芯沿第二方向堆叠，电芯沿第一方向包括相对的第一端和第二端，靠近盖板的电芯为第一电芯，第一方向垂直于第二方向。电池组还包括绝缘组件，绝缘组件设于至少两个电芯的第二端，绝缘组件和至少两个电芯的第二端形成第一空间，第一空间和至少两个电芯之间的间隙连通；绝缘组件封闭第一空间的一侧，第一空间的一侧沿第一方向的相反方向远离电芯，绝缘组件和第一空间形成排气通道，排气通道与电池组外部连通。
这种电池组通过设置绝缘组件，一方面使得电芯的第二端容易移动，提升对电芯模组膨胀程度检测的准确性，另一方面减少了第二树脂层的用量，降低了电池组的成本。
一种可能实现的方式中，电池组包括第一树脂层，第一树脂层设于至少两个电芯的第二端，第一树脂层与绝缘组件以及至少两个电芯的第二端粘接。
这种电池组通过设置第一树脂层，可以减少第二树脂层的用量，使得电芯模组能够被固定的同时，减少电池组的成本。
一种可能实现的方式中，绝缘组件包括第二绝缘件和第三绝缘件，第二绝缘件设于至少两个电芯的第二端，第二绝缘件设有第三通孔，第三通孔和至少两个电芯之间的间隙连通，第三绝缘件封闭第三通孔的一侧，第三通孔的一侧沿第一方向的相反方向远离电芯。
这种电池组可以进一步地减少第二树脂层的用量，减少电池组的成本。
一种可能实现的方式中，沿第一方向观察，第二绝缘件覆盖第一树脂层，第二绝缘件靠近第一树脂层的表面设有粘接结构，第二绝缘件通过粘接结构粘接于电芯。
这种电池组可以使得第二绝缘件能够通过粘接结构粘接于电芯上。
一种可能实现的方式中，第二绝缘件粘接于电芯的第二端，第一树脂层设于第三通孔的边缘。
这种电池组可以减少第一树脂层的用量，减少电池组的成本。
一种可能实现的方式中，电池组包括第一绝缘件，第一绝缘件设于至少两个电芯之间；在第一绝缘件上，靠近电芯的第二端的位置处设置开口；开口连通第一空间。
这种电池组，通过设置第一绝缘件能够给电芯提供形变空间，减少相邻两电芯直接相互挤压，或者电芯与盖板或电池组壳体挤压，造成盖板或者电池组壳体的破裂。通过设置开口连通第一空间，可以实现排气的目的。
一种可能实现的方式中，第二绝缘件包括第一本体，第一本体开设有第三通孔。
这种电池组中第一本体开设有第三通孔，第三通孔能够与多个电芯和第一绝缘件之间存在的间隙连通，实现排气的目的。
一种可能实现的方式中，盖板包括第一通孔，第二绝缘件还包括第一部，第一部的至少部分位于第一通孔。
这种电池组，通过设置第一通孔以使得电芯模组的部分结构能够从第一通孔伸出，进而与设于盖板的外部结构(比如电路板)连接。第一部至少部分位于第一通孔，可以使得第二绝缘件与外部结构连接。
一种可能实现的方式中，第一部通过第一通孔延伸出盖板。
这种电池组中第一部通过第一通孔延伸出盖板，便于第二绝缘件与外部结构连接。
一种可能实现的方式中，第三绝缘件设有排气槽，排气槽连通第三通孔。
这种电池组通过设置排气槽并使得排气槽与第二通孔连通形成排气通道，电池组内部气体可以从排气槽处排出。
一种可能实现的方式中，第三绝缘件包括第二本体和第二部，第二本体封闭第三通孔，第二部连接于第一部，第二部的至少部分位于第一通孔。
这种电池组中第二部对第一部起到支撑固定的作用，第二部至少部分位于第一通孔，可以使得第三绝缘件与外部结构连接。
一种可能实现的方式中，第二部通过第一通孔延伸出盖板。
这种电池组中第二部通过第一通孔延伸出盖板，便于第三绝缘件与外部结构连接。
一种可能实现的方式中，第三绝缘件设有第二粘接区，第二粘接区设有粘接结构，第三绝缘件通过粘接结构和第二绝缘件粘接连接。
这种电池组通过设置粘接区，使得第二绝缘件和第三绝缘件可以通过粘接区的粘接结构连接。
一种可能实现的方式中，第二绝缘件和第三绝缘件为一体成型结构，并设置排气槽，排气槽和第三通孔连通。
这种电池组第二绝缘件和第三绝缘件为一体成型，可以开模，降低加工难度。第二绝缘件和第三绝缘件可为一体成型结构，设置排气槽并使排气槽和第三通孔连通形成排气通道，电池组内部气体可以从排气槽处排出。一种可能实现的方式中，第一绝缘件包括泡棉。
这种电池组中泡棉能够给电芯提供形变空间，减少相邻两电芯直接相互挤压，或者 电芯与盖板或电池组壳体挤压，造成盖板或者电池组壳体的破裂。
一种可能实现的方式中，第一绝缘件开设有第二通孔，第二通孔为电芯提供膨胀空间。
这种电池组中通过在第一绝缘件上开设第二通孔，减少了第一绝缘件用量，也减少了气体的产生。
一种可能实现的方式中，电芯包括电极组件、电芯壳体和金属部，电极组件收容在电芯壳体内，金属部连接电极组件并从电芯壳体延伸出；沿与第二方向相反的方向观察，第一绝缘件在电芯上的投影面积大于或等于电极组件的投影面积。
这种电池组，如此设置第一绝缘件的尺寸，在对堆叠的电芯进行填充第二树脂层时，第二树脂层由电芯的侧边进入相邻两电芯之间，减少第一绝缘件出现无法被压缩的情况。
一种可能实现的方式中，沿与第二方向相反的方向观察，第一绝缘件在电芯上的投影面积小于或等于电芯壳体的投影面积。
这种电池组，如此设置第一绝缘件的尺寸，在将电芯模组组装至电池组壳体中时更加容易，减少出现难易装配的情况。
一种可能实现的方式中，第二树脂层包括灌封胶，第二树脂层将电芯模组和电池组壳体粘接固定在一起。
这种电池组的第二树脂层为灌封胶，灌封胶可以起到对元器件进行粘接、密封、灌封和涂覆保护等作用。
一种可能实现的方式中，第一树脂层通过将液态树脂设于电芯第二端后固定形成。
这种电池组的第一树脂层为液态，便于根据实际情况进行设置。
一种可能实现的方式中，第一绝缘件与电芯的第二端之间存在间隙。
这种电池组使得气体能够从第一绝缘件和电芯之间存在的间隙内通过，便于第一绝缘件对电芯进行排气。
一种可能实现的方式中，绝缘组件的至少部分设于第二树脂层。
这种电池组中绝缘组件可以通过第二树脂层与电芯模组连接。
一种制造电池组的方法，包括如下步骤：
将多个电芯设于电池组壳体内，在至少两个电芯之间设置第一绝缘件，至少两个电芯之间设有间隙；
在至少两个电芯的第二端设置绝缘组件，绝缘组件和至少两个电芯的第二端形成第一空间，第一空间和至少两个电芯之间的间隙连通；
绝缘组件封闭第一空间的一侧，第一空间的一侧沿第一方向的相反方向远离电芯，绝缘组件和第一空间形成排气通道，排气通道与电池组外部连通；
设置绝缘组件后向电池组壳体内灌注第二树脂层。
这种制造电池组的方法，可以制造出上述电池组，这种电池组一方面使得电芯的第二端容易移动，提升对电芯模组膨胀程度检测的准确性，另一方面减少了第二树脂层的用量，减少了电池组所需的成本。
一种可能实现的方式中，第二树脂层的灌注方式可为灌胶或注塑。
这种制造电池组的方法采用灌胶或注塑的方法进行灌注，操作简单。
一种用电装置，包括本体和上述中任一项的电池组，电池组设于本体。
这种用电装置通过采用上述的电池组，可提高其自身的安全性能。
附图说明
图1为本申请的一个实施例中电池组的立体结构示意图。
图2为图1所示的电池组的分解示意图。
图3为图2所示的盖板的另一视角的立体结构示意图。
图4为图2所示的电池组中电芯模组的分解示意图。
图5为图2所示的电芯模组另一实施例的分解示意图。
图6为本申请另一实施例中电池组中电芯模组的分解示意图。
图7为图4所示的电芯模组中电芯的立体结构示意图。
图8为图7所示的电芯的分解示意图。
图9为图4所示的电池组中支架的另一视角的立体结构示意图。
图10为本申请另一实施例中电池组支架的另一视角的立体结构示意图。
图11为图1所示的电池组去掉盖体后沿M-M线的剖视示意图。
图12为图4所示的电芯模组中检测件的分解示意图。
图13为本申请另一实施例中电池组的分解示意图。
图14为图5所示的第一绝缘件的立体结构示意图。
图15为图14所示的第一绝缘件与电芯连接的俯视示意图。
图16为图14所示的第一排气件与电芯堆叠的侧视示意图。
图17为图16所示的堆叠的电芯和第一排气件设有第一树脂层的示意图。
图18为图5所示的第二绝缘件的立体结构示意图。
图19为图5所示的第三绝缘件的立体结构示意图。
图20为图2所示的电池组中电芯模组沿N-N线的剖视示意图。
图21为本申请另一实施例中第一排气件与电芯连接的俯视示意图。
图22为本申请又一实施例中电池组中电芯模组的分解示意图。
主要元件符号说明
电池组                                  100
盖板                                    10
板体                                    11
凸起部                                  12
避让口                                  13
第一通孔                                14
电芯模组                                20
电芯                                    21
第一电芯                                M
第一面                                  O
第二面                            P
电极组件                          211
电芯壳体                          212
容纳部                            2121
金属部                            213
第一端                            A
第二端                            B
第一表面                          214
第二表面                          215
支架                              22
主体                              221
凸部                              222
凹槽                              223
固定部                            224
固定孔                            225
检测件                            23
第一检测部                        231
第二检测部                        232
第一粘接区                        233
引导线                            234
支撑部                            235
连接部                            236
支撑件                            24
转接组件                          25
转接板                            251
转接件                            252
限位件                            253
绝缘组件                          26
第一绝缘件                        261
第二通孔                          2611
开口                              2612
第一树脂层                        262
第二绝缘件                        263
第一本体                          2631
第三通孔                          2632
第一部                            2633
第三绝缘件                        264
第二本体                          2641
第二部                            2642
排气槽                                  2643
第二粘接区                              2644
缓冲件                                  27
胶垫                                    28
电路板                                  29
第二树脂层                              30
电池组壳体                              40
侧壁                                    41
底壁                                    42
收容空间                                43
第一空间                                265
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。
需要说明的是，当一个组件被认为是“连接”另一个组件，它可以是直接连接到另一个组件或者可能同时存在居中组件。当一个组件被认为是“设于”另一个组件，它可以是直接设置在另一个组件上或者可能同时存在居中组件。本文所使用的术语“顶”、“底”、“上”、“下”、“左”、“右”、“前”、“后”、以及类似的表述只是为了说明的目的。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请。
本申请的实施例提供一种电池组，包括盖板、电芯模组、第二树脂层和电池组壳体，电芯模组收容于电池组壳体内，并通过第二树脂层固定，盖板固定于电池组壳体，电芯模组包括多个电芯，多个电芯沿第二方向堆叠，电芯沿第一方向包括相对的第一端和第二端，靠近盖板的电芯为第一电芯，第一方向垂直于第二方向，电池组还包括绝缘组件，绝缘组件设于至少两个电芯的第二端，绝缘组件和至少两个电芯的第二端形成第一空间，第一空间和至少两个电芯之间的间隙连通；绝缘组件封闭第一空间的一侧，第一空间的一侧沿第一方向的相反方向远离电芯，绝缘组件和第一空间形成排气通道，排气通道与电池组外部连通。
下面将结合附图对一些实施方式作详细说明。在不冲突的情况下，下述的实施例及实施例中的特征可以相互组合。
请参阅图1和图2，本申请的实施例提供一种电池组100，包括盖板10、电芯模组20、第二树脂层30和电池组壳体40，电芯模组20和第二树脂层30设于电池组壳体40内，第二树脂层30将电芯模组20固定于电池组壳体40中，盖板10通过紧固件，例如螺丝固定于电池组壳体40，用于和电池组壳体40共同包覆电芯模组20，以保护电芯模组20。在一种实施例中，第二树脂层30通过将树脂注入电池组壳体40后固定形成。在另一种实施例中，第二树脂层30包括灌封胶。
为了更好的对电池组100的结构进行说明，将结合X、Y、Z坐标轴对电池组100 的结构进行叙述，其中，X、Y、Z坐标轴两两垂直。
请参阅图2和图3，盖板10沿Z轴方向设于电池组壳体40，具体的，电池组壳体40和盖板10沿Z轴方向依次设置。盖板10包括板体11，板体11大致呈矩形。当盖板10设于电池组壳体40上时，板体11设于电芯模组20的上表面。
在一实施例中，盖板10还包括凸起部12，凸起部12设于板体11靠近电芯模组20的一侧，以使得盖板10能够通过凸起部12更好的与电芯模组20接触。
在一实施例中，盖板10还包括避让口13，电芯模组20的部分结构能够从避让口13处延伸出电池组壳体40，以显露在盖板10和电池组壳体40之外，使得电芯模组20能够和外部环境连通，便于电芯模组20产生的气体能够排出。
在一实施例中，盖板10还包括第一通孔14，沿第一方向，第一通孔14和避让口13设于板体11的相对两端，通过设置第一通孔14，以使得电芯模组20的部分结构能够从第一通孔14伸出，进而与设于盖板10的外部结构(比如电路板)连接。在本实施例中，第一方向为沿X轴方向。
可以理解的是，在其他实施例中，板体11的形状不限于此，在不同形状的电池组100中，板体11的形状可根据不同的电池组100进行变换。
请参阅图4和图5，电芯模组20包括多个堆叠的电芯21、支架22和检测件23，多个电芯21沿第二方向堆叠，在本实施例中，第二方向为沿Z轴方向。在本实施例中，第二方向为电芯21的厚度方向。支架22设于电芯21的上方位置处，在本实施例中，支架22设于靠近盖板10的电芯21的上方，进一步地，将靠近盖板10的电芯21定义为第一电芯M，支架22位于盖板10和第一电芯M之间。检测件23设于支架22上，进一步地，检测件23设于盖板10和支架22之间，用于检测电芯模组20的膨胀程度，当电芯模组20的膨胀程度大于安全膨胀程度时，能够通过检测件23检测出，从而提升电池组100的安全性。
请参阅图6、图7和图8，具体的，电芯21包括电极组件211、电芯壳体212和金属部213，电芯壳体212设有容纳部2121，电极组件211收容在电芯壳体212的容纳部2121，金属部213连接电极组件211并从电芯壳体212延伸出。沿第二方向，第一电芯M包括相对设置的第一面O和第二面P。
电芯壳体212可具有绝缘层、金属层和粘接层，电芯壳体212通过粘接层粘接于电极组件211上，从而实现与电极组件211的连接，金属层位于绝缘层和粘接层之间，能够增强电芯壳体212的强度，绝缘层远离电极组件211，能够防止外部汽水渗入其内部。金属部213用于与外部结构连接，使得电芯21能够和外部结构连通。并且，相邻两电芯21的金属部213连接，实现多个电芯21之间的电连通。本实施例中，金属部213为极耳，极耳分为正极耳和负极耳，相邻两电芯21的正负极耳连接。
电芯21沿第一方向设置，且金属部213沿第一方向从电芯壳体212中延伸出。
沿第一方向，电芯21包括相对设置的第一端A和第二端B，第一端A为延伸出有金属部213的一端，第二端B为远离设有金属部213的一端。在本实施例中，金属部213包括两个，两个金属部213自电芯21的第一端A延伸出电芯壳体212，在其他实施例中，两个金属部213中的一个可自电芯21的第一端A延伸出电芯壳体212，另一个金属部213可自电芯21的第二端B延伸出电芯壳体212。本实施例中，在第二端B，电芯 21包括第一表面214和第二表面215，第一表面214和第二表面215不在同一平面。沿第一方向，第一表面214相较于第二表面215更加靠近第一端A。在一种实施例中，第二表面215能够在电芯模组20设置其他构件时作为一个基准，从而使得电芯模组20的整体结构更加平整，便于电芯模组20组装至电池组壳体40中。
请参阅图4、图5和图9，支架22架设于第一电芯M的上方，支架22包括主体221，主体221大致为矩形板状结构，沿第三方向，主体221延伸的距离与电芯21延伸的距离大致相同。在本实施例中，第三方向为沿Y轴方向。其中,“大致”的含义为并非绝对的等同，二者之间可存在+/-5mm至+/-10mm的偏差。在一种实施例中，主体221与第一电芯M之间存在第一间隙(图未标示)，当对电池组壳体40进行灌胶时，第二树脂层30流入该第一间隙内，以加强主体221和第一电芯M之间的固定强度。
在一实施例中，支架22还包括多个凸部222，多个凸部222间隔设于主体221靠近第一电芯M的一侧，且凸部222朝第一电芯M延伸第一距离，以使得凸部222延伸出主体221，凸部222和主体221形成凹槽223，凹槽223与第一间隙连通。通过设置凸部222能够增加主体221的强度，同时，请参阅图11，当电芯模组20设于电池组壳体40内时，第二树脂层30能够设于主体221和电芯21之间，凹槽223处设有第二树脂层30，从而使得支架22和电芯21之间的稳定性更强。
在一实施例中，支架22还包括固定部224，沿第三方向，固定部224连接于主体221的侧边。在一种实施例中，固定部224包括两个，两个固定部224连接于主体221的相对两侧边。本实施例中，固定部224与主体221垂直设置，其他实施例中，固定部224与主体221可以其他角度设置。支架22通过固定部224固定于电池组壳体40内，从而对支架22起到预定位的作用，减少在对电芯模组20进行灌胶的过程中，因第二树脂层30的流动带动支架22移动。在一种实施例中，固定部224开设有固定孔225，固定部224通过固定孔225卡扣于电池组壳体40的内壁，以实现支架22的预定位。
固定部224与电池组壳体40之间卡扣连接，以使得电芯21膨胀时，能够更加便捷的带动支架22移动。当第二树脂层30固定电芯模组20时，固定孔225处的第二树脂层30较少，其固定程度较低，不影响支架22的移动情况。
可以理解理解的是，在其他实施例中，固定部224的数量和设置位置不限于此。例如，固定部224还可设置为六个或八个等。主体221的形状也不限于此。
在一种实施例中，电芯模组20包括支架22，沿第二方向将支架22设于第一电芯M的上方，第一电芯M的第一面O可能存在凹凸不平的现象。通过设置支架22，将检测件23设于支架22上，以使得检测件23位于一平整的表面，提升了检测件23检测的准确性。
可以理解的是，其他实施例中，支架22还可设于相邻两电芯21之间，不限于上述的设于第一电芯M的上方。
请参阅图10，在另一实施例中，还提供一种支架22，支架22包括主体221、凸部222和固定部224。凸部222设于主体221靠近第一电芯M的表面，以使得主体221和第一电芯M之间存在第一间隙，第二树脂层30能够设于主体221和第一电芯M之间。固定部224与上述实施例中固定部224的结构相同。在此，不再进行赘述。
请参阅图4、图5和图12，检测件23用于检测电芯模组20的膨胀程度，并传递所 检测到的信息。检测件23包括第一检测部231、第二检测部232和引导线234，第一检测部231设于支架22靠近盖板10的表面，第二检测部232设于第一检测部231。引导线234与第一检测部231连接，当第一检测部231和第二检测部232连接时，通过引导线234传递信息。
在一种实施例中，第一检测部231和第二检测部232均包括一薄膜片，并在薄膜片上设置导电银浆，导电银浆可作为第一检测部231和第二检测部232的导电部。
检测件23还包括第一粘接区233，第一粘接区233设于第一检测部231靠近边缘的部分，并在该位置处涂覆例如胶水或双面胶等结构，使得第一检测部231和第二检测部232通过第一粘接区233能够连接。第一粘接区233处涂覆有胶水，使得第一检测部231和第二检测部232之间除第一粘接区233以外的其他区域之间形成间隙，例如，形成0.2mm的间隙。
当电芯模组20发生膨胀时，第一电芯M顶推第二树脂层30，第二树脂层30顶推支架22，支架22带动第一检测部231朝第二检测部232的方向靠近，直至二者之间连接。连接后的第一检测部231和第二检测部232上的导电银浆接触，形成导通的回路，并通过引导线234与外部结构连接，从而传递出第一检测部231和第二检测部232连通的信息。
在一种实施例中，盖板10设有凸起部12，为了能够使得检测件23的检测效果更加准确，凸起部12的设置位置与检测件23相对应。当电芯21发生膨胀时，因凸起部12能够抵持第二检测部232，从而使得第一检测部231和第二检测部232之间更容易连接，提升了检测件23的准确性。
在本实施例中，当第一检测部231和第二检测部232未连接时，引导线234的电阻可以被认为是无限大的，当电芯21发生异常膨胀时，可使得第一检测部231和第二检测部232连接，形成完整的回路，引导线234的电阻迅速下降，从而能够及时响应并检测出来，提升了电池组100的安全性。
可以理解的是，在其他实施例中，检测件23的检测形式不限于检测电阻这一种情况。例如，还可为第一检测部231和第二检测部232导通后便能够及时响应的检测方式，或者其他具有等同功效或作用的检测形式都可适用。
在一实施例中，检测件23和支架22还可设于相邻两电芯21之间。
在一实施例中，可对电芯21膨胀的程度进行设置。例如，可将电芯21膨胀的程度大于15％作为一个临界值。可以理解的是，也可以选择更大的膨胀临界值，以便于电池组100在使用的过程中能够减低误触发的几率。在一具体实施例中，电芯21正常的膨胀程度为0～20％。第一检测部231和第二检测部232之间存在间隙，可允许电芯21进一步膨胀，在一种实施方式中，该间隙可允许电芯21再膨胀5％，当电芯21膨胀到20％时，第一检测部231和第二检测部连接导通。
请参阅图6，在一实施例中，检测件还包括支撑部235，当电芯模组20发生膨胀时，第一检测部231和第二检测部232沿第二方向移动，移动的过程中将会拉扯引导线234。由于第二树脂层30固定引导线234，第一检测部231和第二检测部232在移动的过程中可能会将引导线234拉断。为了降低这种情况发生，在引导线234靠近支架22的侧边设置支撑部235，支撑部235位于引导线234和支架22之间，以增加引导线234沿第二 方向的高度。将引导线234抬高些，在电芯模组20发生膨胀时，第一检测部231和第二检测部232发生移动，引导线234可以一起移动，降低将引导线234拉断的情况发生。在一种实施例中，沿第三方向支撑部235与第一检测部231和第二检测部232之间存在第一距离d，如此设置，可使得第一检测部231和第二检测部232更加平整。当检测到电芯21发生异常膨胀后，电芯模组20断开电芯21之间的电导通，减少电芯21的继续使用。也可使得检测件23导通后，电芯模组20做熔断处理，形成电池组100的开路，而无法再继续使用。
请参阅图6，在一实施例中，为了使得检测件23能够更容易的对电芯21的膨胀情况进行检测，将检测件23靠近电芯21的第二端B设置，在一种具体实施方式中，沿第一方向X，第二端B到第一端A的距离为L，可将检测件23沿第一方向X离第二端B的距离为1/4～1/3L处设置。支架22设于第一电芯M的位置可根据检测件23的设置位置进行调整。电芯21的第一端A设有金属部213，金属部213需要与外部结构连接，以实现电芯21的电导通，第二端B未连接任何外部结构。
第二树脂层30将电芯模组20固定于电池组壳体40内，金属部213与外部结构连接，第一端A被第二树脂层30固定，设在第二端B的第二树脂层30相比与设在第一端A的第二树脂层30较少，使得第二端B的粘接强度弱于第一端A，第一端A的机械强度要大于第二端B，因此第二端B相对于第一端A更容易膨胀。为了降低第二端B因灌胶较少，容易出现晃动的情况，可在第二端B处设置绝缘组件26，以减轻第二端B发生晃动。
电芯模组20表面设有第二树脂层30，为了能够更加容易的被检测出电芯模组20是否发生膨胀，对第二端B位置处进行不完全灌胶，以使得第二端B更容易移动。将检测件23设于靠近第二端B，更容易对电芯模组20的膨胀程度进行检测。
在一种实施例中，当第二树脂层30固定电芯模组20时，第二树脂层30设于支架22与第一电芯M之间，进一步地，第二树脂层30还可设于支架22背离第一电芯M的表面，第一电芯M的第一面O也全设有第二树脂层30，以使得电芯21在膨胀的过程中通过第二树脂层30顶推支架22时，支架22的整体受力更加均匀，顶推力的传导也更加均匀，检测件23的检测更加准确。
支架22通过第二树脂层30进行固定之外，检测件23需要显露于第二树脂层30外，减少出现第二树脂层30固定检测件23，使得检测件23的第一检测部231和第二检测部232无法移动。
请参阅图13，本申请的另一实施例还提供一种检测件23，另一实施例中，检测件23包括第一检测部231、第二检测部232和连接部236，，第一检测部231设于支架22时，将第一检测部231设于支架22靠近盖板10表面上，第二检测部232设于盖板10靠近电芯21的表面上。电芯模组20未设置支架22时，将第一检测部231设于第一电芯M靠近盖板10的表面上，第二检测部232设于盖板10靠近第一电芯M的表面上。第二检测部232设有连接部236，连接部236从第二检测部232朝第一检测部231延伸出，连接部236相对于第二检测部232能够移动，并能够与第二检测部232之间形成电导通的状态，第二检测部232上设有引导线234，通过引导线234传递信息。
当电芯21在正常情况下未膨胀时，第一检测部231和第二检测部232之间存在间 隙。当电芯21发生异常膨胀的情况，电芯21顶持第一检测部231，或通过支架22顶持第一检测部231与第二检测部232上的连接部236连接，第一检测部231和连接部236连接后，第一检测部231顶推连接部236移动，使得连接部236与第二检测部232导通，第二检测部232内部形成电导通状态，通过引导线234将导通的信息传递出去，以实现检测的目的。
在该实施例中，第一检测部231为绝缘片，第二检测部232为行程开关，而连接部236为该行程开关上的触头。
可以理解的是，检测件23的形式不限于上述的薄膜片检测或行程开关检测。在其他实施例中，检测件23还可替换为，例如金属片的检测形式。
请参阅图4和图5，在一实施例中，电芯模组20还包括支撑件24，支撑件24设于相邻两电芯21的金属部213的连接位置处。具体的，相邻两电芯21的金属部213连接后，金属部213之间形成收容槽(图未标示)，支撑件24设于收容槽内。将支撑件24设于收容槽中，可对金属部213起到支撑固定的作用，同时，支撑件24能够将相邻两电芯21之间未连接的金属部213间隔开，减少其接触后造成电芯21之间出现短路的情况。
在一种实施例中，支撑件24为泡棉。可以理解的是，在其他实施例中，支撑件24还可替换为其他具有等同功效或作用的结构。
请参阅图4和图5，在一实施例中，电芯模组20还包括转接组件25，转接组件25设于电芯21的第一端A，用于连接金属部213和引导线234，使得金属部213和引导线234能够与外部结构连接，以实现对电芯21的内电压等数据的监测，以及接收到引导线234传递的信息后，实现对电芯21采用保护机制的启动。
转接组件25包括转接板251、转接件252和限位件253，转接板251设于电芯21的第一端A，沿第三方向观察，引导线234从第一检测部231延伸出后，沿着电芯21的侧边朝转接板251的方向延伸，并与转接板251电连接。其中，电芯21的“侧边”指电芯21的第一端A和第二端B之间靠近边缘的位置。转接件252设于转接板251上并与转接板251电连接，限位件253用于对设于转接板251上的转接件252进行限位，减少转接件252移动。
在一种实施例中，转接板251为电路板。在一种实施例中，转接件252为铜排，进一步地，该铜排可分为总正铜排和总负铜排，总正铜排与远离盖板10的电芯21上的正极耳连接，总负铜排与靠近盖板10的电芯21上的负极耳连接，限位件253对总正铜排进行限位。在一种实施例中，限位件253为限位泡棉。
可以理解的是，在其他实施例中，总正铜排和总负铜排与电芯21连接的正、负极耳连接可以进行替换。限位件253还可替换为替他具有等同功效或作用的结构。
请参阅图4和图5，在一实施例中，为了减少灌入电池组壳体40内的第二树脂层30，可在电芯21的第二端B处设置绝缘组件26，一方面使得电芯21的第二端B容易移动，提升对电芯模组20膨胀程度检测的准确性，另一方面减少了电池组100所需的成本。绝缘组件26和电芯21的第二端B形成第一空间265，第一空间265和至少两个电芯21之间的间隙连通，绝缘组件26封闭第一空间265的一侧，第一空间265的一侧沿第一方向的反方向远离电芯21。绝缘组件26和第一空间265形成排气通道，排气通 道与电池组100外部大气连通。
电池组100包括第一树脂层262，第一树脂层262设于电芯21的第二端B处，第一树脂层262呈一中空的矩形形状，设于电芯21上时，能够减少第二树脂层30进入其中空的部分，绝缘组件26设于第一树脂层262的表面，以封闭第一树脂层262的中空部分。如此设置，减少了第一树脂层262的用量，同时减少了第二树脂层30的用量，使得电芯模组20能够被固定的同时，减少电池组100的成本。
在一种实施例中，当电池组100处于恶劣环境下，例如处于高温环境下时，电池组100内外气压不同而发生安全性问题，电芯模组20还可通过绝缘组件26进行排气。例如，可利用绝缘组件26将电芯21产生的气体或者电池组100内部的其他结构产生的气体排出。
第一树脂层262和绝缘组件26之间共同形成排气通道，排气通道与电池组100外部连通，从而实现电池组100内部结构的排气目的。
请参阅图4和图14，电池组100包括第一绝缘件261，第一绝缘件261设于相邻两电芯21之间，第一绝缘件261通过在其相对的两表面设置例如双面胶，从而使得第一绝缘件261能够粘接于电芯21表面，从而使得相邻电芯21之间能够两两固定，以形成一个稳固的电芯模组20，第一空间265至少形成于相邻两电芯21与绝缘组件26之间。在一种实施例中，第一绝缘件261为泡棉。通过在相邻两电芯21之间设置泡棉，若电芯21发生膨胀，泡棉能够给电芯21提供形变空间，减少相邻两电芯21直接相互挤压，或者电芯21与盖板10或电池组壳体40挤压，造成盖板10或者电池组壳体40的破裂。
可以理解的是，在其他实施例中，第一绝缘件261还可替换为其他具有等同功效或作用的结构。双面胶也可替换为其他形式的粘胶，如液态胶水。
第一绝缘件261开设有第二通孔2611，在一种实施例中，第二通孔2611大致呈矩形，以使得第二通孔2611的形状和电芯21的形状大致相同，从而能够更好的适用于电芯21。通过在第一绝缘件261开设第二通孔2611，电芯21在第二通孔2611位置处能够有更多的空间发生膨胀，例如可通过第二通孔2611提供的空间给电芯21设置膨胀范围。同时，还可减少第一绝缘件261的用量，降低电池组100的成本。
在一实施例中，电芯21的薄弱点在第一面O或第二面P上。此处“薄弱点”指电芯21中更容易被冲破的位置。
请参阅图8和图15，在一实施例中，沿与第二方向相反的方向观察，第一绝缘件261在电芯21上的投影面积最小为电极组件211的面积，最大投影面积为电芯壳体212的面积。在一种实施例中，第一绝缘件261在电芯21上的投影面积设于最大投影面积和最小投影面积之间。如此设置第一绝缘件261的尺寸，一方面减少在对堆叠的电芯21进行填充第二树脂层30时，第二树脂层30由电芯21的侧边进入相邻两电芯21之间，第一绝缘件261出现无法被压缩的情况；另一方面在将电芯模组20组装至电池组壳体40中时也更加容易，减少出现难易装配的情况。
在一种实施例中，为了便于第一绝缘件261对电芯21进行排气，在靠近电芯21第二端B位置处的部分第一绝缘件261不设置双面胶，使得该部分的第一绝缘件261与电芯21之间不进行粘接，从而使得气体能够从第一绝缘件261和电芯21之间存在的间隙内通过。具体的，第一绝缘件261不设置双面胶的部分，如图15中虚线所示的部分。
请参阅图16，堆叠的电芯21之间设有第一绝缘件261，沿与第一方向相反的方向观察，第一绝缘件261的端部与电芯21的第二端B位置处的第一表面214齐平。将第一绝缘件261的端部与第二表面215齐平，能够有效减少第二树脂层30进入电芯21之间，影响电芯21正常膨胀，同时便于电芯21与电池组壳体40之间的组装。
在一实施例中，第一绝缘件261的邵氏硬度C的范围为38°+/-5°。将第一绝缘件261的硬度设于此范围之间，一方面便于压缩第一绝缘件261，减少出现第一绝缘件261因硬度偏大，电芯21在挤压第一绝缘件261时，第一绝缘件261无法被压缩；另一方面使得堆叠的电芯21和第一绝缘件261的尺寸更容易管控，减少出现因第一绝缘件261的硬度偏小，容易发生变形。
在一实施例中，第一绝缘件261采用弹性闭孔材料制成，采用该种材料能够使得第一绝缘件261既能够发生形变，为电芯21的膨胀提供变形空间，同时不渗胶，有效保证第二树脂层30无法进入相邻两电芯21之间。
请参阅图17，堆叠的电芯21在第二端B位置处设有第一树脂层262，在本实施例中，沿第一方向观察，第一树脂层262大致呈一中空矩形形状，第一树脂层262通过将液态树脂设于电芯21的第二端B后固定形成。请结合图16，在电芯21的第二端B，第一表面214和第二表面215与第一端A的距离不同，通过设置第一树脂层262，将第一表面214和第二表面215之间的槽(图未标示)填满，以减少后续灌胶时，第二树脂层30流动至第一表面214和第二表面215，影响电芯模组20的排气。
可以理解的是，将第一树脂层262设置为呈一中空的矩形形状是根据堆叠的电芯21而设计的。可以理解的是，在其他实施例中，当电芯21替换为其他堆叠的形状时，第一树脂层262的形状也随之改变。
请参阅图5和图18，为了进一步地减少第二树脂层30的灌入，绝缘组件26包括第二绝缘件263和第三绝缘件264。第二绝缘件263设于第一树脂层262的表面，沿第一方向观察，第二绝缘件263覆盖第一树脂层262。第二绝缘件263在靠近第一树脂层262的表面设有例如双面胶的粘接结构(图未示)，以使得第二绝缘件263能够通过双面胶粘接于电芯21上。
第二绝缘件263包括第一本体2631，第一本体2631也大致呈矩形。第一本体2631开设有第三通孔2632，第三通孔2632呈长方形，且其长度方向沿第二方向，以使得第三通孔2632能够与多个电芯21和第一绝缘件261之间存在的间隙连通，实现排气的目的。
在一实施例中，第二绝缘件263还包括第一部2633，第一部2633从第一本体2631沿第二方向延伸出，当电芯模组20与盖板10组装时，第一部2633至少部分位于盖板10的第一通孔14处。
在一种实施例中，第二绝缘件263为泡棉。可以理解的是，在其他实施例中，第二绝缘件263还可替换为其他具有等同功效或作用的结构。第二绝缘件263的形状不限于此，根据电芯21堆叠的情况不同，第二绝缘件263的形状能够相应的进行替换。
请参阅图5和图19，第三绝缘件264设于第二绝缘件263背离第一树脂层262的表面，且第三绝缘件264和第二绝缘件263的结构大致相同。
请同时参阅图20，第三绝缘件264包括第二本体2641和第二部2642，第二部2642 从第二本体2641沿第二方向延伸出，第二本体2641和第二部2642分别与第一本体2631和第一部2633相对应，第一部2633对第二部2642能够起到支撑固定的作用。第二本体2641和第二部2642上设有排气槽2643，当第三绝缘件264与第二绝缘件263连接时，排气槽2643与第二通孔2611连通形成排气通道，气体从排气槽2643处排出电池组外部。
在一种实施例中，当盖板10与电芯模组20组装时，第一部2633和第二部2642沿第二方向超出盖板10的距离大于2mm，以减少第二树脂层30进入排气通道中，出现无法排气泄压的情况。排气槽2643沿与第一方向相反的方向凹陷的深度为小于或者等于0.2mm，排气槽2643沿第三方向的距离为1mm至3mm之间，如此设置排气槽2643的尺寸，使得排气槽2643能够起到防尘的作用，减少灰尘等杂质堵住排气通道。
第二本体2641上设有第二粘接区2644，第二粘接区2644设于第二本体2641的边缘位置。通过在第二粘接区2644上设置例如双面胶的粘接结构(图未示)，使得第三绝缘件264和第二绝缘件263连接。
在一种实施例中，第三绝缘件264可由聚碳酸酯(PC)材料制成。可以理解的是，第三绝缘件264的制成材料不限于此，在其他实施例中，还可采用其他具有等同功效或作用的结构。
可以理解的是，在其他实施例中，第二绝缘件263和第三绝缘件264可为一体成型结构，并在二者之间共同设置排气槽2643，并使排气槽2643和第三通孔2632连通。
当将绝缘组件26设于堆叠的电芯21上时，先将电芯21与第一绝缘件261间隔设置并堆叠，然后将第一树脂层262设于堆叠的电芯21的第二端B处直至第一树脂层262固化并固定于电芯21的第二端B，再将第二绝缘件263设于第一树脂层262上，最后将第三绝缘件264设于第二绝缘件263上，以完成绝缘组件26与电芯21之间的组装。
请参阅图21和图22，在另一实施例中，靠近电芯21的第二端B位置处，在第一绝缘件261上设置一开口2612，再将第一绝缘件261粘接于电芯21表面。
然后将第二绝缘件263粘接于电芯21的第二端B处，使得开口2612与第三通孔2632连通，即开口2612与第一空间265连通。再沿着第三通孔2632的边缘设置第一树脂层262。在本实施例中，第一树脂层262大至形成为框形结构，其中，“类似”指看起来较为相似，实际是在第三通孔2632的边缘设置具有厚度的第一树脂层262，能够减少第二树脂层30流入第三通孔2632内，影响排气。最后将第三绝缘件264设于第二绝缘件263上，排气槽2643与第三通孔2632连通，形成完整的排气通道，便于对电芯模组20进行排气。
进一步地，当第一绝缘件261为泡棉时，泡棉及设于泡棉上的双面胶在高温环境下会分解产生气体，第一绝缘件261上设置第二通孔2611减少了第一绝缘件261用量，也减少了气体的产生。泡棉及泡棉上双面胶产生的气体也通过排气通道排出。
请参阅图4和图5，在一实施例中，电池组100还包括缓冲件27，所诉缓冲件27沿第三方向设于电芯模组20的侧边。在一种实施例中，缓冲件27设于引导线234上并位于电芯模组20的侧边。将缓冲件27设于引导线234上，能够对引导线234起到固定的作用，减少因电芯21发生膨胀而带动引导线234移动，影响引导线234传递信息的准确性。同时，还可对电芯模组20起到缓冲的作用，当电池组100发生震动时，缓冲 件27可减少电芯模组20直接与电池组壳体40发生撞击而导致电芯21出现损坏的情况。
在一种实施例中，缓冲件27为泡棉。可以理解的是，在其他实施例中，缓冲件27还可替换为其他具有等同功效或作用的结构。
请参阅图4，在一实施例中，电池组100还包括胶垫28，胶垫28沿第二方向设于电芯模组20和电池组壳体40之间，用于保护电芯21，减少将电芯模组20组装于电池组壳体40内时，电芯21撞击电池组壳体40出现变形的情况。
在一种实施例中，胶垫28为硅胶垫28。可以理解的是，在其他实施例中，胶垫28还可替换为其他具有等同功效或作用的结构，例如，设置泡棉，也可对电芯21起到保护的作用。
请参阅图2，电池组100还包括电路板29，电路板29设于盖板10背离电芯模组20的表面，转接组件25中的转接件252连接于电路板29上，转接板251通过线连接或其他连接方式与电路板29连接。在一种实施例中，电路板29为Battery Management System板(BMS板)，用于对电芯21上电压等数据的进行控制，以及在接收到引导线234传递出的信息后对电芯21的电路及时做出响应，以保证电芯21的安全。
请参阅图2，第二树脂层30通过灌注的方式设于电芯21的侧边后固定形成，用来固定多个电芯21，电芯21通过电芯壳体212将电极组件211进行封装后，电芯壳体212的侧封边位置处，通过第二树脂层30固定多个电芯21，即在相邻两电芯21侧边存在间隙的位置处填充有第二树脂层30，使得相邻两电芯21之间通过第二树脂层30粘接固定。在一种实施例中，电芯21的侧边，也可为电芯21的外轮廓周边位置，从而使得第二树脂层30在固定电芯21时，更加牢固。进一步地，组装支架22至电芯模组20上时，是当第二树脂层30还未完全固定时将其进行安装。
第二树脂层30的灌注方式可为灌胶或注塑，例如，低压注塑。在本实施例中，第二树脂层30为灌封胶，该灌封胶可以起到对元器件进行粘接、密封、灌封和涂覆保护等作用。在一种实施例中，第二树脂层30为环氧树脂灌封胶。可以理解的是，在其他实施例中，第二树脂层30还可替换为其他类型的灌封胶。
请再参阅图2，电池组壳体40收容电芯模组20，第二树脂层30设于电芯模组20和电池组壳体40之间，例如，第二树脂层30为灌封胶，将灌封胶通过灌注的方式灌入到电芯模组20和电池组壳体40之间，灌封胶固定后形成固态的第二树脂层30，第二树脂层30将电芯模组20和电池组壳体40粘接固定在一起，加强电池组100的结构强度。盖板10和电池组壳体40固定连接，例如，采用紧固件，如螺丝将盖板10安装至电池组壳体40上，以对设于电池组壳体40内的电芯模组20进行保护。
电池组壳体40大致呈一无上盖的中空长方体结构，包括四个侧壁41和底壁42，四个侧壁41和底壁42围成收容空间43，电芯模组20设于收容空间43内。进一步地，盖板10和电池组壳体40共同包覆电芯模组20，电池组壳体40的形状根据多个沿第二方向堆叠的电芯21进行设置。在一种实施例中，绝缘组件26设于电芯21的第二端B与远离金属部213的侧壁41之间。
可以理解的是，在其他实施例中，电池组壳体40的形状不限于此，例如电芯模组20呈圆形时，电池组壳体40的形状可根据电芯模组20的形状进行替换。
可以理解的是，在其他实施例中，盖板10和电池组壳体40的固定方式不限于此， 例如，还可替换为卡扣固定的连接方式，或者在盖板10和电池组壳体40相对应的边缘位置处涂覆粘胶，通过粘胶将二者进行固定。
本申请的实施例还提供一种用电装置(图未示)，用电装置包括本体和上述任一实施例中的电池组100，电池组100设于本体中。例如，用电装置可为电动车、电动公交车、电动汽车、储能设备、电动自行车、飞行设备等。相应的，当用电设备为电动车时，本体为车体结构，电池组100设于该车体结构内，用于进行供电。
可以理解的是，在其他实施例中，用电装置还可是手持电动装置，例如吸尘器、除草机等。
综上，本申请实施例中提供电池组100及用电装置，通过在电芯21上设置检测件23，用于检测电芯模组20的膨胀程度是否超出安全膨胀范围，当电芯模组20的膨胀程度超出安全膨胀范围后，检测件23及时做出响应，以保护电池组100，减少发生安全性问题。同时，电芯模组20上设置绝缘组件26，绝缘组件26所形成的排气通道与外部大气连通，使得电池组100内部产生的气体能够排出到外部，平衡电池组100内外压强，解决因气压不平衡带来的风险。
另外，本技术领域的普通技术人员应当认识到，以上的实施例仅是用来说明本申请，而并非用作为对本申请的限定，只要在本申请的实质精神范围之内，对以上实施例所作的适当改变和变化都落在本申请公开的范围之内。

Claims (25)

  1. 一种电池组，包括盖板、电芯模组、第二树脂层和电池组壳体，所述电芯模组收容于所述电池组壳体内，并通过所述第二树脂层固定，所述盖板固定于所述电池组壳体，所述电芯模组包括多个电芯，所述电芯包括沿第一方向相对设置的第一端和第二端，所述电芯包括设于第一端的金属部，多个所述电芯沿第二方向堆叠，所述第一方向垂直于所述第二方向，其特征在于，还包括：
    绝缘组件，设于至少两个所述电芯的第二端，所述绝缘组件和所述至少两个所述电芯的第二端形成第一空间，所述第一空间和所述至少两个所述电芯之间的间隙连通；
    所述绝缘组件封闭所述第一空间的一侧，所述第一空间的一侧沿所述第一方向的相反方向远离所述电芯，所述绝缘组件和所述第一空间形成排气通道，所述排气通道与电池组外部连通。
  2. 如权利要求1所述的电池组，其特征在于，所述电池组包括第一树脂层，所述第一树脂层设于所述至少两个所述电芯的第二端，所述第一树脂层与所述绝缘组件以及所述至少两个所述电芯的第二端粘接。
  3. 如权利要求2所述的电池组，其特征在于，所述绝缘组件包括第二绝缘件和第三绝缘件，所述第二绝缘件设于至少两个所述电芯的第二端，所述第二绝缘件设有第三通孔，所述第三通孔和所述至少两个所述电芯之间的间隙连通，所述第三绝缘件封闭所述第三通孔的一侧，所述第三通孔的一侧沿所述第一方向的相反方向远离所述电芯。
  4. 如权利要求3所述的电池组，其特征在于，沿所述第一方向观察，所述第二绝缘件覆盖所述第一树脂层，所述第二绝缘件靠近所述第一树脂层的表面设有粘接结构，所述第二绝缘件通过所述粘接结构粘接于所述电芯。
  5. 如权利要求3所述的电池组，其特征在于，所述第二绝缘件粘接于所述电芯的所述第二端，所述第一树脂层设于所述第三通孔的边缘。
  6. 如权利要求1所述的电池组，其特征在于，所述电池组包括第一绝缘件，所述第一绝缘件设于所述至少两个所述电芯之间；在所述第一绝缘件上，靠近所述电芯的第二端的位置处设置开口；所述开口连通所述第一空间。
  7. 如权利要求3所述的电池组，其特征在于，所述第二绝缘件包括第一本体，所述第一本体开设有所述第三通孔。
  8. 如权利要求3所述的电池组，其特征在于，所述盖板包括第一通孔，所述第二绝缘件还包括第一部，所述第一部的至少部分位于所述第一通孔。
  9. 如权利要求8所述的电池组，其特征在于，所述第一部通过所述第一通孔延伸出所述盖板。
  10. 如权利要求3所述的电池组，其特征在于，所述第三绝缘件设有排气槽，所述排气槽连通所述第三通孔。
  11. 如权利要求8所述的电池组，其特征在于，所述第三绝缘件包括第二本体和第二部，所述第二本体封闭所述第三通孔，所述第二部连接于所述第一部，所述第二部的至少部分位于所述第一通孔。
  12. 如权利要求11所述的电池组，其特征在于，所述第二部通过所述第一通孔延伸 出所述盖板。
  13. 如权利要求8所述的电池组，其特征在于，所述第三绝缘件设有第二粘接区，所述第二粘接区设有粘接结构，所述第三绝缘件通过所述粘接结构和所述第二绝缘件粘接连接。
  14. 如权利要求8所述的电池组，其特征在于，所述第二绝缘件和所述第三绝缘件为一体成型结构，并设置排气槽，所述排气槽和所述第三通孔连通。
  15. 如权利要求6所述的电池组，其特征在于，所述第一绝缘件包括泡棉。
  16. 如权利要求6所述的电池组，其特征在于，所述第一绝缘件开设有第二通孔，所述第二通孔为所述电芯提供膨胀空间。
  17. 如权利要求6所述的电池组，其特征在于，所述电芯包括电极组件、电芯壳体和金属部，所述电极组件收容在所述电芯壳体内，所述金属部连接所述电极组件并从所述电芯壳体延伸出；沿与所述第二方向相反的方向观察，所述第一绝缘件在所述电芯上的投影面积大于或等于所述电极组件的投影面积。
  18. 如权利要求17所述的电池组，其特征在于，沿与所述第二方向相反的方向观察，所述第一绝缘件在所述电芯上的投影面积小于或等于所述电芯壳体的投影面积。
  19. 如权利要求1所述的电池组，其特征在于，所述第二树脂层包括灌封胶，所述第二树脂层将所述电芯模组和所述电池组壳体粘接固定在一起。
  20. 如权利要求2所述的电池组，其特征在于，所述第一树脂层通过将液态树脂设于所述电芯所述第二端后固定形成。
  21. 如权利要求6所述的电池组，其特征在于，所述第一绝缘件与所述电芯的第二端之间存在间隙。
  22. 如权利要求1所述的电池组，其特征在于，所述绝缘组件的至少部分设于所述第二树脂层的外部。
  23. 一种制造电池组的方法，包括如下步骤：
    将多个电芯设于所述电池组壳体内，在至少两个所述电芯之间设置第一绝缘件，至少两个所述电芯之间设有间隙；
    在所述至少两个所述电芯的第二端设置绝缘组件，所述绝缘组件和所述至少两个所述电芯的第二端形成第一空间，所述第一空间和所述至少两个所述电芯之间的间隙连通；
    所述绝缘组件封闭所述第一空间的一侧，所述第一空间的一侧沿第一方向的相反方向远离所述电芯，所述绝缘组件和所述第一空间形成排气通道，所述排气通道与所述电池组外部连通；
    设置所述绝缘组件后向电池组壳体内灌注第二树脂层。
  24. 如权利要求23所述的制造电池组的方法，其特征在于：所述第二树脂层的灌注方式为灌胶或注塑。
  25. 一种用电装置，其特征在于，所述用电装置包括本体和如权利要求1至22中任一项所述的电池组，所述电池组设于所述本体。
PCT/CN2022/073318 2021-01-21 2022-01-21 电池组、制造电池组的方法及用电装置 WO2022156787A1 (zh)

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