WO2021253334A1 - 具有泄压结构的电池包 - Google Patents

具有泄压结构的电池包 Download PDF

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Publication number
WO2021253334A1
WO2021253334A1 PCT/CN2020/096850 CN2020096850W WO2021253334A1 WO 2021253334 A1 WO2021253334 A1 WO 2021253334A1 CN 2020096850 W CN2020096850 W CN 2020096850W WO 2021253334 A1 WO2021253334 A1 WO 2021253334A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure relief
spacer
battery
cell assembly
housing
Prior art date
Application number
PCT/CN2020/096850
Other languages
English (en)
French (fr)
Inventor
袁宏伟
王慎波
李翔
吴克成
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 PCT/CN2020/096850 priority Critical patent/WO2021253334A1/zh
Priority to EP20866929.1A priority patent/EP3958382A4/en
Priority to CN202080021568.5A priority patent/CN113597708B/zh
Priority to US17/219,739 priority patent/US20210399380A1/en
Publication of WO2021253334A1 publication Critical patent/WO2021253334A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/14—Primary casings; Jackets or wrappings for protecting against damage caused by external factors
    • H01M50/143—Fireproof; Explosion-proof
    • 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
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • 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
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • 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
    • H01M50/394—Gas-pervious parts or elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/471—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
    • H01M50/474—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by their position inside the cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/471—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
    • H01M50/477—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by their shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/20—Pressure-sensitive devices
    • 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
    • H01M50/342—Non-re-sealable arrangements
    • 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

  • This application relates to a battery pack.
  • it relates to a battery pack with a pressure relief structure.
  • the present application proposes a battery pack with a pressure relief structure, which includes: a casing provided with an accommodating cavity; a battery cell assembly accommodated in the accommodating cavity; a spacer arranged on a first side of the battery assembly Between the housing and the housing, the partition is provided with vents; a pressure relief portion is provided on the housing, and there is an air channel between the pressure relief portion and the partition; glue, filling The gap between at least a part of the area outside the first side of the cell assembly and the housing is used to fix the cell assembly and the housing.
  • the cell assembly includes a cell body and tabs.
  • the cell body is provided with a top seal on the first side.
  • the tabs are arranged on the battery core body and protrude from one side of the top seal.
  • the top seal is provided with at least one weak area that allows the gas to flow out of the battery body when impacted by the gas inside the battery body.
  • the spacer is arranged between the top seal and the casing, and isolates the glue from the weak area.
  • the spacer is attached to the weakened area on the top seal, or there is an air channel between the spacer and the weakened area, the spacer is provided with a protruding part, so The protruding portion protrudes from the top seal and extends to the pressure relief portion.
  • the battery cell assembly further includes a support for supporting the tabs, and the support presses the spacer on the top seal.
  • the cell assembly includes a cell body and a tab; the tab is disposed on the cell body and protrudes out of the cell body; the cell body is located at The first side is provided with at least one side seal, the side seal is located on one side of the tab; the side seal is provided with at least one side seal that causes the gas to flow out of the electrical In the weak area of the core body, the spacer is arranged between the side seal and the shell; and isolates the glue from the weak area.
  • the spacer is attached to the weakened area on the side seal, or there is an air channel between the spacer and the weakened area, the spacer is provided with a protruding part, so The protruding part protrudes from the side seal and extends to the pressure relief part.
  • the number of the battery cell assembly is multiple, the spacer fills the gap between the two battery core assemblies, and the spacer is provided with an escape hole to leave the Space for deformation of battery core components.
  • the pressure relief portion is a through hole structure provided on the housing, and the spacer is at least partially inserted into or attached to the pressure relief portion.
  • the battery pack further includes an adhesive tape that is adhered to the outside of the casing and covers the pressure relief portion.
  • the tape has a dust-proof and waterproof structure.
  • a cutting line is provided on the adhesive tape.
  • the pressure relief portion is a weak structure provided on the housing that separates from the housing when impacted by the gas inside the cell assembly.
  • the glue is also filled between the first side of the cell assembly and the housing.
  • the glue is filled in the first side of the cell assembly
  • the gap between at least a part of the area outside of one side and the housing makes the spacer and the cell assembly free of glue and forms a gas pressure relief channel;
  • the spacer is in contact with the pressure relief portion with an air passage between, so that there is no glue between the spacer and the pressure relief portion and a gas pressure relief passage is formed, so that the gas in the cell assembly is discharged to the After the battery cell assembly, it is discharged from the battery pack through the pressure relief channel, the vent hole and the pressure relief portion.
  • Fig. 1 is a schematic structural diagram of a battery pack according to an embodiment of the present application.
  • FIG. 2 is an exploded schematic diagram of the structure of the battery pack shown in FIG. 1.
  • FIG. 3 is a schematic diagram of the structure of the battery pack shown in FIG. 1 along the A direction.
  • Fig. 4 is a schematic structural diagram of the battery pack shown in Fig. 1 with the casing removed.
  • FIG. 5 is an exploded schematic diagram of the structure of the battery pack shown in FIG. 4.
  • a battery pack with a pressure relief structure including: a casing provided with an accommodating cavity; a battery cell assembly accommodated in the accommodating cavity; Between the first side and the housing, the partition is provided with a vent; a pressure relief portion is provided on the housing, and the pressure relief portion is in contact with the partition or there is an air passage between them; Glue is used to fill the gap between at least a part of the area outside the first side of the battery core assembly and the housing for fixing the battery core assembly and the housing.
  • the glue is filled in the first side of the cell assembly
  • the gap between at least a part of the area outside of one side and the housing makes the spacer and the cell assembly free of glue and forms a gas pressure relief channel;
  • the spacer is in contact with the pressure relief portion with an air passage between, so that there is no glue between the spacer and the pressure relief portion and a gas pressure relief passage is formed, so that the gas in the cell assembly is discharged to the After the battery cell assembly, it is discharged from the battery pack through the pressure relief channel, the vent hole and the pressure relief portion.
  • An embodiment of the present application provides a battery pack 100 with a pressure relief structure.
  • the battery pack 100 includes a casing 10, a battery cell assembly 20, and a spacer.
  • the spacer includes a spacer 30 and a spacer 40.
  • the housing 10 is provided with an accommodating cavity 101.
  • the cell assembly 20, the spacer 30 and the spacer 40 are respectively accommodated in the accommodating cavity 101 of the housing 10.
  • the cell assembly 20 includes a cell body 21 and tabs 23.
  • the cell body 21 includes a top seal 211 and side seals 213 located on both sides of the top seal 211.
  • the tab 23 is disposed on the battery core body 21 and protrudes out of the top seal 211.
  • Two ends of the top seal 211 are connected to the two side seals 213 respectively.
  • the spacer is provided between the first side of the cell assembly 20 and the housing 10.
  • the first side includes the top seal 211 side and the side seal 213 side of the cell body 21, that is, the spacer 30 is provided on the top seal 211 of the cell assembly 20 and the housing 10 In between, the spacer 40 is provided between the side seal 213 of the cell assembly 20 and the housing 10.
  • the spacer 30 and the spacer 40 are respectively provided with ventilation holes (not shown in the figure).
  • the accommodating cavity 101 is filled with glue 200.
  • the glue 200 fills the gap between at least a part of the area outside the first side of the cell assembly 20 and the housing 10.
  • the glue 200 is filled to all the spaces between the cell assembly 20, the spacer 30, and the housing 10, but is not filled into the spacer 30 and the cell body
  • the space between the top seal 211 of 21 and the space between the spacer 40 and the side seal 213 of the cell body 21 is not filled, but it is not limited thereto.
  • the glue 200 can also fill the gaps between the cell assembly 20, the spacer 30 and the housing 10, as long as the glue 200 can fix the cell assembly 20 and the housing 10 are sufficient.
  • the glue 200 is also filled between the first side of the cell assembly and the housing.
  • the housing 10 is provided with a pressure relief portion 11 and a pressure relief portion 13 respectively.
  • the pressure relief portion 11 is in contact with the partition 30 or there is an air channel between them to prevent the glue 200 from entering between the pressure relief portion 11 and the partition 30.
  • the spacer 30 is in contact with the top seal 211 of the cell body 21 or there is an air channel between them to prevent the glue 200 from entering between the spacer 30 and the top seal 211.
  • the gas in the cell assembly 20 After the gas in the cell assembly 20 is discharged from the top seal 211 to the cell body 21, it can flow directly through the vent hole of the spacer 30 to between the pressure relief portion 11 and the spacer 30 It is also possible to pass through the air passage between the partition 30 and the top seal 211, and then flow through the vent hole of the partition 30 to flow between the pressure relief portion 11 and the partition 30.
  • the gas passes through the air passage between the pressure relief portion 11 and the partition 30 and then is discharged from the pressure relief portion 11 to the housing 10, or the gas is directly discharged from the pressure relief portion 11 to the housing 10 ⁇ 10 ⁇ Body 10.
  • the pressure relief portion 13 is in contact with the partition 40 or there is an air channel between them to prevent the glue 200 from entering between the pressure relief portion 13 and the partition 40.
  • the spacer 40 is in contact with the side seal 213 of the cell body 21 or there is an air channel between them, so as to prevent the glue 200 from entering between the spacer 40 and the side seal 213.
  • the spacer 30 and the spacer 40 are air-permeable structures made of air-permeable materials.
  • the material of the spacer 30 and the spacer 40 is foam or sponge.
  • the battery cell assembly 20 is provided with a weak area 201 that allows the gas to flow out of the battery cell assembly 20 when the battery is impacted by the gas inside the battery cell assembly 20.
  • a weak area 201 that allows the gas to flow out of the battery cell assembly 20 when the battery is impacted by the gas inside the battery cell assembly 20.
  • At least part of the spacer 30 is attached to the weakened area 201, or an air channel is provided between the spacer 30 and the weakened area 201, so that when the casing 10 is filled with glue 200,
  • the weak area 201 is isolated from the glue 200 to ensure that the weak area 201 and the spacer 30 form a pressure relief channel for gas to circulate.
  • the pressure relief portion 11 is a through hole structure provided on the housing 10.
  • the partition 30 facing the pressure relief portion 11 is attached to the inner wall of the housing 10, so that the partition 30 and the pressure relief portion 11 are attached to each other. Furthermore, the partition 30 and the pressure relief portion 11 form a pressure relief channel for gas to circulate. It can be understood that, in other embodiments, the spacer 30 may also extend into the pressure relief portion 11, so that the spacer 30 and the pressure relief portion 11 extend and set, thereby preventing the glue 200 from entering the pressure relief portion 11 The pressure relief portion 11 makes the partition 30 and the pressure relief portion 11 form a pressure relief passage for gas to circulate.
  • the top seal 211 is provided with one weak region 201, and the length of the weak region 201 is the same as the length of the top seal 211, but is not limited thereto.
  • the length of the weakened area 201 may also be shorter than the length of the top seal 211; the number of the weakened area 201 may also be two or other numbers, and are arranged at intervals in the The top seal is on 211.
  • the number of the battery cell assembly 20 is six, but it is not limited thereto. Every two of the battery cell assemblies 20 form a group and are placed together, and the tabs 23 of the two battery core assemblies 20 extend toward each other and are stacked together. The tabs 23 of the two battery core assemblies 20 A accommodating groove 2111 is formed around the top seal 211.
  • the number of the spacer 30 is three. Each of the spacers 30 is disposed in the accommodating groove 2111 between the two battery cell assemblies 20. The spacer 30 is attached to the weakened area 201 on the top seal 211 of the two cell assemblies 20. It can be understood that, in other embodiments, the number of the battery cell assembly 20 may also be one, two, or other numbers.
  • the battery cell assembly 20 further includes a bracket 25.
  • the side of the tab 23 away from the top seal 211 is disposed on the bracket 25, and the bracket 25 is used to support the tab 23.
  • the bracket 25 presses the spacer 30 on the top seal 211. It can be understood that in other embodiments, the spacer 30 may also be fixed to the cell assembly 20 by bonding, and the bonding position avoids the weakened area 201 on the top seal 211.
  • the number of the pressure relief portion 11 on the housing 10 is six.
  • the three pressure relief portions 11 are located on one side of the battery core assembly 20, and the other three pressure relief portions 11 are located on the other side of the battery core assembly 20.
  • the two ends of the spacer 30 are respectively provided with protruding parts 31.
  • the protruding portion 31 protrudes from both ends of the top seal 211 and extends toward the pressure relief portion 11 so that the protruding portion 31 and the pressure relief portion 11 are arranged in a fit manner.
  • the spacer 30 may also be provided with a protruding portion 31 at only one end. Accordingly, the housing 10 is provided on one side of the battery core assembly 20 corresponding to the protruding portion 31.
  • the pressure relief portion 11 As long as the gas in the cell assembly 20 passes through the weakened area 201, the pressure relief channel formed by the spacer 30, and passes through the protruding portion 31 and the pressure relief portion 11 The formed pressure relief channel only needs to discharge the battery pack 100.
  • the side seal 213 of the battery cell assembly 20 is provided with at least one weakened area 203.
  • the spacer 40 is arranged inside the casing 10 and is attached to the weakened area 203 on the side seal 213, so that when the casing 10 is filled with glue 200, the The weak area 203 is isolated from the glue 200 to ensure that the weak area 203 and the spacer 40 form a pressure relief channel for gas to circulate.
  • the spacer 40 is disposed on the side surface 215 of the battery cell assembly 20, and the side surface 215 is connected to the top seal 211 and the two side seals 213 respectively.
  • the side surfaces 215 of the two opposite cell assemblies 20 of the two sets of the cell assemblies 20 are spaced apart to form a gap 205, and the spacer 40 fills the gap 205, but is not limited thereto. It can be understood that, in other embodiments, the side surfaces 215 of the two opposite cell assemblies 20 of the two sets of cell assemblies 20 may also be arranged in close contact with each other. In other embodiments, the spacer 40 may also have a structure similar to the spacer 30, specifically a bar-shaped block structure, and the spacer 40 may also be adhered to the side seal of the cell assembly 20. 213 on.
  • the spacer 40 is provided with an escape hole 43 to leave a space for deformation of the cell assembly 20. It can be understood that, in other embodiments, the escape hole 43 may also be omitted.
  • the pressure relief portion 13 is a through hole structure provided on the housing 10.
  • the spacer 40 is provided with a protruding portion 41 toward one side of the pressure relief portion 13.
  • the protruding portion 41 protrudes from the side seal 213 and extends toward the pressure relief portion 13 to be attached to the inner wall of the housing 10, so that the spacer 40 is attached to the pressure relief portion 13 It is arranged so that the partition 40 and the pressure relief portion 13 form a pressure relief channel for gas to circulate. It can be understood that, in other embodiments, the protruding portion 41 may also extend into the pressure relief portion 13 so that the spacer 40 and the pressure relief portion 13 are extended and arranged.
  • the battery pack 100 with a pressure relief structure further includes an adhesive tape 50 and an adhesive tape 60.
  • the adhesive tape 50 and the adhesive tape 60 have a dust-proof and waterproof structure to prevent dust, liquid, etc. from entering the inside of the battery pack 100.
  • the adhesive tape 50 and the adhesive tape 60 have a tape-like, sheet-like or film-like structure with a viscous substance on one side.
  • the tape 50 is adhered to the outside of the housing 10 and covers the pressure relief portion 11.
  • the tape 60 is adhered to the outside of the housing 10 and covers the pressure relief portion 13.
  • the gas inside the cell assembly 20 impacts the tape 50 and the tape 60 through the pressure relief portion 11 and the pressure relief portion 13, so that the tape 50 and the tape 60 and the housing 10 are completely or Partially detached.
  • a cutting line (not shown) is provided on the adhesive tape 50 and the adhesive tape 60, respectively, so that the adhesive tape 50 and the adhesive tape 60 The tape 60 cracks at the cutting line when it is impacted by the gas. It can be understood that in other embodiments, the cutting line may also be omitted.
  • the housing 10 is also provided with a plurality of grooves 15 to accommodate the adhesive tape 50 and the adhesive tape 60. It can be understood that in other embodiments, the groove 15 may also be omitted.
  • the housing 10 is not limited to using the tape 50 and the tape 60 to cover the pressure relief portion 11 and the pressure relief portion 14.
  • the pressure relief portion may also be a weak structure provided on the housing 10 that separates from the housing 10 when impacted by the gas inside the cell assembly 20 (not shown) .
  • the pressure relief portion may be molded on the housing 10, for example, the pressure relief portion may be a cutting line provided at the molded connection, so that the pressure relief portion is easily broken at the cutting line when the pressure relief portion is impacted by gas. By opening, the pressure relief portion is disconnected from the casing 10, and the gas inside the cell assembly 20 is discharged from the battery pack 100.
  • a structure such as a cutting line or a groove can also be directly provided on the housing 10 to form a weak structure smaller than the thickness of the housing 10, so that the pressure relief portion and the housing 10 The connection strength is weakened, so that the pressure relief portion is easily cracked when impacted by gas, and the gas is discharged out of the battery pack 100.
  • the battery pack 100 may also include only the spacer 30 or only the spacer 40.
  • the pressure relief portion 11 or the pressure relief portion 13 may also be omitted.
  • the number of the spacers 30 and the spacers 40 is set according to the number of the battery cell assemblies 20 and the number of weak areas provided by the battery core assemblies 20.
  • the weak area 201 and the weak area 203 are respectively the weak areas formed at the packaging interface of the cell assembly 20 during packaging, but are not limited thereto. It is understandable that the weakened area on the battery pack 100 is not limited to being provided on the top seal 211 and the side seal 213. The weakened area may also be a weak structure designed on the battery core body 21 that is easy to discharge the gas generated inside when it is abnormal.
  • the spacer 30 or the spacer 40 may also be arranged between the second side of the cell assembly 20 and the housing 10. The second side is other areas except the top seal 211 side and the side seal 213 side of the cell assembly 20.
  • the second side of the cell assembly 20 is provided with the weak structure, so that the gas is discharged from the cell assembly 20 through the weak structure, and flows to the pressure relief portion 11 through the spacer 30 or the spacer 40 Or the pressure relief portion 13 is further discharged from the housing 10.
  • the weakened area may also be provided on the side surface 215 of the cell body 21, and the spacer 40 is attached to the weakened area on the side surface 215 to isolate the weakened area from The glue 200.
  • the gas inside the cell assembly 20 is discharged from the battery pack 100 through the weakened area on the side surface 215, the spacer 40 and the pressure relief portion 11 on the casing 10.
  • the glue 200 is filled in the gap between at least a part of the area outside the first side of the cell assembly 20 and the housing 10, so that there is no glue 200 between the spacer 30/40 and the cell assembly 20
  • a pressure relief channel for gas is formed;
  • the housing 10 is provided with a pressure relief portion 11/13 that is in contact with the partition 30/40 or has an air channel in between, so that the partition 30/40 is in contact with the

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)
  • Gas Exhaust Devices For Batteries (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

本申请公开了一种具有泄压结构的电池包，包括：壳体，设有容置腔。电芯组件，收容于容置腔。隔件，设于电芯组件的第一侧与壳体之间，隔件设有透气孔。泄压部，设于壳体上，泄压部与隔件接触或之间有空气通道。胶，填充于电芯组件的第一侧外的至少部分区域与壳体之间的间隙，用于固定电芯组件和壳体。该电池包设置具有透气孔的隔件，隔件设置在电芯组件的第一侧与壳体之间，胶填充在电芯组件的第一侧外的至少部分区域与壳体之间的间隙，使隔件与电芯组件之间无胶并形成气体的泄压通道。壳体上设置与隔件接触或之间有空气通道的泄压部，使隔件与泄压部之间无胶并形成气体的泄压通道。电芯组件内气体通过上述泄压通道、透气孔及泄压部排出于电池包。

Description

具有泄压结构的电池包 技术领域
本申请涉及一种电池包。尤其涉及一种具有泄压结构的电池包。
背景技术
现有电池包封装时需要在壳体内部灌充胶，胶填充在电芯组件周围，这导致电池包壳体内、电芯组件的周围没有泄压通道，使电池包存在爆炸的风险。
发明内容
有鉴于此，有必要提供一种电池包以解决上述问题。
本申请提出一种具有泄压结构的电池包，包括：壳体，设有容置腔；电芯组件，收容于所述容置腔；隔件，设于所述电芯组件的第一侧与所述壳体之间，所述隔件设有透气孔；泄压部，设于所述壳体上，所述泄压部与所述隔件接触或之间有空气通道；胶，填充于所述电芯组件的所述第一侧外的至少部分区域与所述壳体之间的间隙，用于固定所述电芯组件和所述壳体。
根据本申请的一些实施例，所述电芯组件包括电芯本体和极耳。所述电芯本体于所述第一侧设置有顶封。所述极耳设置于所述电芯本体，并从所述顶封的一侧伸出。所述顶封设有至少一个受所述电芯本体内部气体冲击时使所述气体流出所述电芯本体的薄弱区域。所述隔件设置于所述顶封与所述壳体之间，且隔离所述胶与所述薄弱区域。
根据本申请的一些实施例，所述隔件贴合于所述顶封上的薄弱区域、或所述隔件与所述薄弱区域之间有空气通道，所述隔件设置凸出部，所述凸出部突出于所述顶封外并向所述泄压部延伸。
根据本申请的一些实施例，所述电芯组件还包括用于支撑所述极耳的支 架，所述支架压持所述隔件于所述顶封上。
根据本申请的一些实施例，所述电芯组件包括电芯本体和极耳；所述极耳设置于所述电芯本体，且伸出于所述电芯本体外；所述电芯本体于所述第一侧设置至少一个侧封，所述侧封位于所述极耳的一侧；所述侧封设置有至少一个受所述电芯本体内部气体冲击时使所述气体流出所述电芯本体的薄弱区域，所述隔件设置于所述侧封与所述壳体之间；且隔离所述胶与所述薄弱区域。
根据本申请的一些实施例，所述隔件贴合于所述侧封上的薄弱区域、或所述隔件与所述薄弱区域之间有空气通道，所述隔件设置凸出部，所述凸出部突出于所述侧封外并向所述泄压部延伸。
根据本申请的一些实施例，所述电芯组件的数量为多个，所述隔件填充两个所述电芯组件之间的间隙，所述隔件设置有避让孔，以留出所述电芯组件变形的空间。
根据本申请的一些实施例，所述泄压部为设置于所述壳体上的通孔结构，所述隔件至少部分与所述泄压部伸入或贴合设置。
根据本申请的一些实施例，所述电池包还包括胶带，所述胶带粘接于所述壳体的外部并覆盖所述泄压部。
根据本申请的一些实施例，所述胶带为防尘、防水结构。
根据本申请的一些实施例，所述胶带上设置切刀线。
根据本申请的一些实施例，所述泄压部为所述壳体上设置的受所述电芯组件内部气体冲击时脱离所述壳体的薄弱结构。
根据本申请的一些实施例，所述胶，还填充于所述电芯组件的第一侧与所述壳体之间。
上述电池包中，通过设置具有透气孔的隔件，及所述隔件设置在所述电芯组件的第一侧与所述壳体之间，所述胶填充在所述电芯组件的第一侧外的至少部分区域与所述壳体之间的间隙，使所述隔件与所述电芯组件之间无胶并形成气体的泄压通道；通过在所述壳体上设置与所述隔件接触或之间有空 气通道的泄压部，使所述隔件与所述泄压部之间无胶并形成气体的泄压通道，使所述电芯组件内气体排出于所述电芯组件后，通过上述泄压通道、透气孔及泄压部排出于所述电池包。
附图说明
图1为根据本申请一实施例的电池包的结构示意图。
图2为图1所示的电池包的结构分解示意图。
图3为图1所示的电池包沿A向的结构示意图。
图4为图1所示的电池包去除壳体的结构示意图。
图5为图4所示的电池包的结构分解示意图。
主要元件符号说明
电池包                100
壳体                  10
容置腔                101
泄压部                11，13
凹槽                  15
电芯组件              20
薄弱区域              201，203
间隙                  205
电芯本体              21
顶封                  211
容置槽                2111
侧封                  213
侧面                  215
极耳                  23
支架                  25
隔件                  30，40
凸出部                31，41
避让孔                43
胶带                  50，60
胶                    200
如下具体实施方式将结合上述附图进一步说明本申请。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。
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。
本申请一些实施方式提出一种具有泄压结构的电池包，包括：壳体，设有容置腔；电芯组件，收容于所述容置腔；隔件，设于所述电芯组件的第一侧与所述壳体之间，所述隔件设有透气孔；泄压部，设于所述壳体上，所述泄压部与所述隔件接触或之间有空气通道；胶，填充于所述电芯组件的所述第一侧外的至少部分区域与所述壳体之间的间隙，用于固定所述电芯组件和所述壳体。
上述电池包中，通过设置具有透气孔的隔件，及所述隔件设置在所述电芯组件的第一侧与所述壳体之间，所述胶填充在所述电芯组件的第一侧外的至少部分区域与所述壳体之间的间隙，使所述隔件与所述电芯组件之间无胶并形成气体的泄压通道；通过在所述壳体上设置与所述隔件接触或之间有空气通道的泄压部，使所述隔件与所述泄压部之间无胶并形成气体的泄压通道，使所述电芯组件内气体排出于所述电芯组件后，通过上述泄压通道、透气孔及泄压部排出于所述电池包。
下面结合附图，对本申请的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。
请同时参阅图1至图3，本申请的一实施例提出一种具有泄压结构的电池包100。所述电池包100包括壳体10、电芯组件20和隔件。一实施例中，所述隔件包括隔件30和隔件40。所述壳体10设置有容置腔101。所述电芯组件20、所述隔件30和所述隔件40分别收容于所述壳体10的容置腔101内。
请参阅图4和图5，所述电芯组件20包括电芯本体21和极耳23。所述电芯本体21包括顶封211、及位于所述顶封211两侧的侧封213。所述极耳23设置于所述电芯本体21，并伸出于所述顶封211外。所述顶封211的两端分别与两个所述侧封213相接。所述隔件设于所述电芯组件20的第一侧与所述壳体10之间。所述第一侧包括所述电芯本体21的顶封211一侧及侧封213一侧，即，所述隔件30设于所述电芯组件20的顶封211与所述壳体10之间，所述隔件40设于所述电芯组件20的侧封213与所述壳体10之间。所述隔件30和所述隔件40分别设有透气孔(图未示)。
所述容置腔101内灌充胶200。所述胶200填充于所述电芯组件20的所述第一侧外的至少部分区域与所述壳体10之间的间隙。一实施例中，所述胶200填充至所述电芯组件20、所述隔件30分别与所述壳体10的间隔的全部，且未填充至所述隔件30与所述电芯本体21的顶封211之间、及未填充至所述隔件40与所述电芯本体21的侧封213之间，但不限于此。例如，其他实施例中，所述胶200也可以填充所述电芯组件20、所述隔件30分别与所述壳体10的间隔的部分，只要所述胶200能够固定所述电芯组件20和所述壳体10即可。当所述电池包100应用于振动的环境时，提高所述电池包100的结构抗震性能和固定强度。在一些实施例中，胶200还填充于所述电芯组件的第一侧与所述壳体之间。
请参阅图2，所述壳体10上分别设有泄压部11和泄压部13。所述泄压部11与所述隔件30接触或之间有空气通道，以避免所述胶200进入所述泄 压部11与所述隔件30之间。所述隔件30与所述电芯本体21的顶封211接触或之间有空气通道，以避免所述胶200进入所述隔件30与所述顶封211之间。所述电芯组件20内的气体从顶封211排出于所述电芯本体21后，可以直接经过所述隔件30的透气孔流至所述泄压部11与所述隔件30之间；也可以通过所述隔件30与所述顶封211之间的空气通道后，然后经过所述隔件30的透气孔流至所述泄压部11与所述隔件30之间。气体通过所述泄压部11与所述隔件30之间的空气通道后从所述泄压部11排出于所述壳体10，或气体直接从所述泄压部11排出于所述壳体10。
所述泄压部13与所述隔件40接触或之间有空气通道，以避免所述胶200进入所述泄压部13与所述隔件40之间。所述隔件40与所述电芯本体21的侧封213接触或之间有空气通道，以避免所述胶200进入所述隔件40与所述侧封213之间。所述电芯组件20内的气体从顶封211排出于所述电芯本体21后，流至所述隔件40与所述侧封213之间，并通过所述隔件40的透气孔流至所述隔件40与所述泄压部13之间，最后从所述泄压部13排出于所述壳体10。
所述隔件30和所述隔件40为采用透气材质制成的透气结构，例如，所述隔件30和所述隔件40的材质为泡棉或海绵等。
请参阅图5，所述电芯组件20设置有受所述电芯组件20内部气体冲击时使所述气体流出所述电芯组件20的薄弱区域201。所述隔件30的至少部分贴合所述薄弱区域201，或在所述隔件30与所述薄弱区域201之间设置空气通道，以当向所述壳体10内灌充胶200时，使所述薄弱区域201与所述胶200隔离，保证所述薄弱区域201和所述隔件30形成供气体流通的泄压通道。所述泄压部11为设置于所述壳体10上的通孔结构。一实施例中，所述隔件30朝向所述泄压部11一侧的至少部分与所述壳体10的内壁贴合，使所述隔件30与所述泄压部11贴合设置，进而使所述隔件30和所述泄压部11形成供气体流通的泄压通道。可以理解的是，在其他实施例中，所述隔件30也可以伸入所述泄压部11，使所述隔件30与所述泄压部11伸入设置，进而避免 胶200进入所述泄压部11，使所述隔件30和所述泄压部11形成供气体流通的泄压通道。
所述顶封211设置一个所述薄弱区域201，所述薄弱区域201的长度与所述顶封211的长度相同，但不限于此。例如，在其他实施例中，所述薄弱区域201的长度也可以较所述顶封211的长度短；所述薄弱区域201的数量也可以为两个或其他数量，并间隔地设置于所述顶封211上。
所述电芯组件20的数量为六个，但不限于此。每两个所述电芯组件20组成一组贴合放置，且两个该电芯组件20的极耳23相向延伸并叠置在一起，两个所述电芯组件20的所述极耳23和所述顶封211围绕形成一容置槽2111。所述隔件30的数量为三个。每个所述隔件30设置于两个所述电芯组件20之间的所述容置槽2111内。所述隔件30贴合于两个所述电芯组件20的所述顶封211上的薄弱区域201。可以理解，其他实施例中，所述电芯组件20的数量也可以为一个、两个等其他数量。
所述电芯组件20还包括支架25。所述极耳23背离所述顶封211的一侧设置于所述支架25上，所述支架25用于支撑所述极耳23。所述支架25压持所述隔件30于所述顶封211上。可以理解，其他实施例中，所述隔件30也可以采用粘接方式固定于所述电芯组件20上，粘接位置避开所述顶封211上的薄弱区域201。
所述壳体10上的所述泄压部11的数量为六个。三个所述泄压部11位于所述电芯组件20的一侧，另外三个所述泄压部11位于所述电芯组件20的另一侧。
所述隔件30的两端分别设置凸出部31。所述凸出部31突出于所述顶封211的两端外，并向所述泄压部11延伸，使所述凸出部31与所述泄压部11贴合设置。
可以理解，其他实施例中，所述隔件30也可以仅在一端设置凸出部31，相应地，所述壳体10对应所述凸出部31在所述电芯组件20的一侧设置所述泄压部11，只要所述电芯组件20内的气体通过所述薄弱区域201、所述隔件 30形成的泄压通道，及通过所述凸出部31与所述泄压部11形成的泄压通道排出所述电池包100即可。
所述电芯组件20的所述侧封213设有至少一个薄弱区域203。所述隔件40设置于所述壳体10的内部，并贴合于所述侧封213上的所述薄弱区域203，以当向所述壳体10内灌充胶200时，使所述薄弱区域203与所述胶200隔离，保证所述薄弱区域203和所述隔件40形成供气体流通的泄压通道。具体地，所述隔件40设置于所述电芯组件20的侧面215，所述侧面215分别与所述顶封211和两个所述侧封213相接。两组所述电芯组件20中相对的两个电芯组件20的侧面215间隔设置以形成间隙205，所述隔件40填充所述间隙205，但不限于此。可以理解的是，在其他实施例中，两组电芯组件20中相对的两个电芯组件20的侧面215也可以贴合设置。在其他实施例中，所述隔件40也可以与所述隔件30的结构相似，具体为条形块状结构，所述隔件40也可以粘接于所述电芯组件20的侧封213上。
所述隔件40设置避让孔43，以留出所述电芯组件20变形空间。可以理解的是，在其他实施例中，所述避让孔43也可以省略。
所述泄压部13为设置于所述壳体10上的通孔结构。所述隔件40朝向所述泄压部13的一侧设置凸出部41。所述凸出部41突出于所述侧封213外并向所述泄压部13延伸至与所述壳体10的内壁贴合，使所述隔件40与所述泄压部13贴合设置，进而使所述隔件40和所述泄压部13形成供气体流通的泄压通道。可以理解的是，在其他实施例中，所述凸出部41也可以伸入所述泄压部13，使所述隔件40与所述泄压部13伸入设置。
请同时参阅图1和图2，所述一种具有泄压结构的电池包100还包括胶带50和胶带60。所述胶带50和所述胶带60为防尘、防水结构，以防止粉尘、液体等进入所述电池包100的内部。所述胶带50和所述胶带60为单面具有粘性物质的带状、片状或膜状结构。所述胶带50粘接于所述壳体10的外部并覆盖所述泄压部11。所述胶带60粘接于所述壳体10的外部并覆盖所述泄压部13。所述电芯组件20内部的气体通过所述泄压部11和泄压部13 冲击所述胶带50和所述胶带60，使所述胶带50和所述胶带60与所述壳体10全部或部分脱离。
为进一步使所述胶带50和所述胶带60与所述壳体10易脱离，所述胶带50和所述胶带60上分别设置切刀线(图未示)，使所述胶带50和所述胶带60当受所述气体冲击时在所述切刀线处裂开。可以理解的是，在其他实施例中，所述切刀线也可以省略。
所述壳体10上还设置多个凹槽15，以容置所述胶带50和所述胶带60。可以理解的是，在其他实施例中，所述凹槽15也可以省略。
可以理解，所述壳体10不限于采用所述胶带50和所述胶带60覆盖所述泄压部11和所述泄压部14。例如，在另一实施例中，所述泄压部也可以为所述壳体10上设置的受所述电芯组件20内部气体冲击时脱离所述壳体10的薄弱结构(图未示)。所述泄压部可以成型于所述壳体10上，例如，所述泄压部可以为在成型连接处设置切刀线，使所述泄压部受气体冲击时易在切刀线处断开，使所述泄压部与所述壳体10断开，进而使所述电芯组件20内部的气体排出所述电池包100。又一实施例中，也可以在所述壳体10上直接设置切刀线或凹槽等结构，以形成小于所述壳体10的厚度的薄弱结构，使所述泄压部与壳体10的连接强度薄弱化，进而使所述泄压部受气体冲击时易裂开，使气体排出所述电池包100。
可以理解的是，在其他实施例中，所述电池包100也可以仅包括所述隔件30或仅包括所述隔件40。相应地，所述泄压部11或所述泄压部13也可以省略。所述隔件30和所述隔件40的数量依据所述电芯组件20的数量及所述电芯组件20设置的薄弱区域的数量设定。
所述薄弱区域201和所述薄弱区域203分别为所述电芯组件20在封装时在封装接口处形成的薄弱区域，但不限于此。可以理解的是，所述电池包100上薄弱区域不限于设置在所述顶封211和所述侧封213上。所述薄弱区域也可以为所述电芯本体21上设计的易于其异常时内部产生的气体排出的薄弱结构。所述隔件30或所述隔件40也可以设置于所述电芯组件20的第二侧与 所述壳体10之间。所述第二侧为除了所述电芯组件20的顶封211一侧及侧封213一侧的其他区域。所述电芯组件20的第二侧设置有该薄弱结构，以使气体通过该薄弱结构排出所述电芯组件20，并通过所述隔件30或隔件40流至所述泄压部11或泄压部13，进而排出于所述壳体10。例如，在其他实施例中，所述薄弱区域也可以设置于所述电芯本体21的侧面215上，通过所述隔件40与所述侧面215上的薄弱区域贴合以隔离该薄弱区域和所述胶200。电芯组件20内部的气体通过所述侧面215上的薄弱区域、所述隔件40和所述壳体10上的泄压部11排出所电池包100。
上述电池包100中，通过设置具有透气孔的隔件30/40，及所述隔件30/40设置在所述电芯组件20的第一侧与所述壳体10之间，所述胶200填充在所述电芯组件20的第一侧外的至少部分区域与所述壳体10之间的间隙，使所述隔件30/40与所述电芯组件20之间无胶200并形成气体的泄压通道；通过在所述壳体10上设置与所述隔件30/40接触或之间有空气通道的泄压部11/13，使所述隔件30/40与所述泄压部11/13之间无胶200并形成气体的泄压通道，使所述电芯组件20内气体排出于所述电芯组件20后，通过上述泄压通道、透气孔及泄压部11/13排出于所述电池包100。
以上实施例仅用以说明本申请的技术方案而非限制，尽管参照较佳实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解，可以对本申请的技术方案进行修改或等同替换，而不脱离本申请技术方案的精神和实质。

Claims (13)

  1. 一种具有泄压结构的电池包，包括：
    壳体，设有容置腔；
    电芯组件，收容于所述容置腔；其特征在于，还包括：
    隔件，设于所述电芯组件的第一侧与所述壳体之间，所述隔件设有透气孔；
    泄压部，设于所述壳体上，所述泄压部与所述隔件接触或之间有空气通道；
    胶，填充于所述电芯组件的所述第一侧之外的至少部分区域与所述壳体之间的间隙，用于固定所述电芯组件和所述壳体。
  2. 如权利要求1所述的电池包，其特征在于：所述电芯组件包括电芯本体和极耳；
    所述电芯本体于所述第一侧设置有顶封；
    所述极耳设置于所述电芯本体，并从所述顶封的一侧伸出；
    所述顶封设有至少一个受所述电芯本体内部气体冲击时使所述气体流出所述电芯本体的薄弱区域；
    所述隔件设置于所述顶封与所述壳体之间，且隔离所述胶与所述薄弱区域。
  3. 如权利要求2所述的电池包，其特征在于：所述隔件贴合于所述顶封上的薄弱区域，或所述隔件与所述薄弱区域之间有空气通道，所述隔件设置凸出部，所述凸出部突出于所述顶封外并向所述泄压部延伸。
  4. 如权利要求3所述的电池包，其特征在于：所述电芯组件还包括用于支撑所述极耳的支架，所述支架压持所述隔件于所述顶封上。
  5. 如权利要求1所述的电池包，其特征在于：所述电芯组件包括电芯本体和极耳；
    所述极耳设置于所述电芯本体，且伸出于所述电芯本体外；
    所述电芯本体于所述第一侧设置至少一个侧封，所述侧封位于所述极耳 的一侧；
    所述侧封设置有至少一个受所述电芯本体内部气体冲击时使所述气体流出所述电芯本体的薄弱区域，所述隔件设置于所述侧封与所述壳体之间；
    且隔离所述胶与所述薄弱区域。
  6. 如权利要求5所述的电池包，其特征在于：所述隔件贴合于所述侧封上的薄弱区域、或所述隔件与所述薄弱区域之间有空气通道，所述隔件设置凸出部，所述凸出部突出于所述侧封外并向所述泄压部延伸。
  7. 如权利要求5所述的电池包，其特征在于：所述电芯组件的数量为多个，所述隔件填充两个所述电芯组件之间的间隙，所述隔件设置有避让孔，以留出所述电芯组件变形的空间。
  8. 如权利要求1所述的电池包，其特征在于：所述泄压部为设置于所述壳体上的通孔结构，所述隔件至少部分与所述泄压部伸入或贴合设置。
  9. 如权利要求8所述的电池包，其特征在于：所述电池包还包括胶带，所述胶带粘接于所述壳体的外部并覆盖所述泄压部。
  10. 如权利要求9所述的电池包，其特征在于：所述胶带为防尘、防水结构。
  11. 如权利要求9所述的电池包，其特征在于：所述胶带上设置切刀线。
  12. 如权利要求1所述的电池包，其特征在于：所述泄压部为所述壳体上设置的受所述电芯组件内部气体冲击时脱离所述壳体的薄弱结构。
  13. 如权利要求1所述的电池包，其特征在于：所述胶，还填充于所述电芯组件的第一侧与所述壳体之间。
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