WO2023035430A1 - Module de batterie - Google Patents

Module de batterie Download PDF

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Publication number
WO2023035430A1
WO2023035430A1 PCT/CN2021/135376 CN2021135376W WO2023035430A1 WO 2023035430 A1 WO2023035430 A1 WO 2023035430A1 CN 2021135376 W CN2021135376 W CN 2021135376W WO 2023035430 A1 WO2023035430 A1 WO 2023035430A1
Authority
WO
WIPO (PCT)
Prior art keywords
subsection
battery module
insulating plate
battery
pressure relief
Prior art date
Application number
PCT/CN2021/135376
Other languages
English (en)
Chinese (zh)
Inventor
鬲新海
王大庆
宋海生
张训银
Original Assignee
深圳市富兰瓦时技术有限公司
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 深圳市富兰瓦时技术有限公司 filed Critical 深圳市富兰瓦时技术有限公司
Publication of WO2023035430A1 publication Critical patent/WO2023035430A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/02—Details
    • 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
    • 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
    • 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

  • Embodiments of the present invention relate to the technical field of batteries, and in particular to a battery module.
  • the battery module Since the battery module is formed by a combination of multiple cells, it is usually fixed by plastic connection or metal welding to ensure the stability of the overall structure of the battery module. However, in the later stages of the battery module cycle, the internal cells may The risk of expansion brings safety hazards to the entire battery module, leading to rework of the overall maintenance of the battery module, increasing maintenance costs, and making maintenance difficult.
  • An embodiment of the present invention provides a battery module, which prevents failure of any battery cell from affecting adjacent battery cells and reduces maintenance risks.
  • An embodiment of the present invention provides a battery module, including: a first end fixing plate, a second end fixing plate, clamped between the first end fixing plate and the second end fixing plate A plurality of electric cores and a spacer between two adjacent electric cores;
  • the separator is used to isolate two adjacent cells.
  • the spacer is provided with a plurality of holes, and the holes pass through the spacer;
  • the battery module further includes adhesive glue filled between two adjacent battery cells, and the adhesive glue bonds two adjacent battery cells through the holes.
  • the battery module includes an elastic structure disposed on a side of the separator near the battery cell, and the thickness of the elastic structure is greater than that of the separator.
  • the battery cell includes a first surface and a second surface oppositely disposed, and the first surface is provided with a positive pole tab and a negative pole tab;
  • the battery module further includes a first insulating plate located on the side of the first surface away from the second surface, the first insulating plate is provided with a positive tab connection end and a negative tab connection end;
  • the positive tab is electrically connected to the positive tab connection end
  • the negative tab is electrically connected to the negative tab connection end
  • the battery module further includes a second insulating plate located on a side of the first insulating plate away from the first surface,
  • the first surface is provided with a pressure relief valve
  • the first insulating plate is provided with a first pressure relief hole
  • the second insulating plate is provided with a second pressure relief hole
  • the first pressure relief hole, the second pressure relief hole and the pressure relief valve are arranged correspondingly.
  • the second insulating plate includes movable insulating ear caps, and the movable insulating ear caps respectively cover the positive electrode tab connection end and the negative electrode tab connection end.
  • the first insulating board includes a low-voltage plug-in
  • the second insulating board includes a low-voltage plug-in protection cover
  • the low-voltage plug-in protection cover covers the low-voltage plug-in.
  • the battery core further includes a third surface and a fourth surface oppositely arranged, and the third surface and the fourth surface are respectively connected to the first surface and the second surface;
  • the battery module includes a first metal sheet and a second metal sheet; the first metal sheet includes a first subsection, a second subsection and a third subsection, and the second subsection is respectively connected to the first subsection.
  • the subsection is connected to the third subsection;
  • the second metal sheet includes a fourth subsection, a fifth subsection and a sixth subsection, and the fifth subsection is connected to the fourth subsection and the sixth subsection respectively.
  • the Division Six Connection ;
  • the first subsection and the fourth subsection are respectively connected to the first surface
  • the second subsection is connected to the third surface
  • the third subsection and the sixth subsection are connected to the first surface.
  • the second surface is connected
  • the fifth subsection is connected to the fourth surface.
  • the battery module further includes a first binding piece and a second binding piece, and the first binding piece and the second binding piece are spaced between the first end fixing plate and the second binding piece.
  • the battery module further includes connecting rods and fasteners;
  • the side of the second insulating plate facing away from the first insulating plate is provided with a connecting rod slot, the connecting rod is fixedly connected with the connecting rod slot, and the fasteners pass through the connecting holes of the connecting rod respectively. It is connected with the first end fixing plate and the second end fixing plate.
  • the present invention provides a battery module.
  • the battery module includes a first end fixing plate, a second end fixing plate, and a plurality of The battery and the spacer between two adjacent batteries; the spacer is used to isolate two adjacent batteries, so that when any battery fails, it can be isolated through the spacer to avoid damage to adjacent batteries. core damage.
  • FIG. 1 is a schematic structural diagram of a battery module provided by an embodiment of the present invention
  • Fig. 2 is a schematic structural diagram of a spacer provided by an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of another battery module provided by an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of another battery module provided by an embodiment of the present invention.
  • Fig. 1 is a schematic structural diagram of a battery module provided by an embodiment of the present invention.
  • the battery module 100 includes: a first end fixing plate 101, a second end fixing plate 102, clamped on A plurality of electric cores 103 between the first end fixing plate 101 and the second end fixing plate 102 and a spacer 104 between two adjacent electric cores 103; the spacer 104 is used to isolate two adjacent electric Core 103.
  • first end fixing plate 101 and the second end fixing plate 102 are respectively in contact with the two electric cores 103 located at the ends. Since a plurality of electric cores 103 are arranged in the same direction, the first end fixing plate 101 and the second end The upper fixing plate 102 can support and fix the plurality of battery cells 103 to ensure a compact arrangement of the battery cells 103 .
  • a spacer 104 for isolation is provided between two adjacent battery cells 103, and the spacer 104 and the battery cells 103 are fixed by adhesives, fixing glue, etc. to ensure that the overall structure of the battery module 100 is stable. firm.
  • the existence of the spacer 104 can separate the faulty battery cell 103 in time, avoiding damage to adjacent battery cells 103 , and effectively reducing the potential safety hazard of the battery module 100 .
  • the material of the spacer 104 can be made of insulating materials such as plastic and resin, and the embodiment of the present invention does not specifically limit the material of the spacer 104 .
  • the embodiment of the present invention provides a battery module.
  • the battery module includes a plurality of battery cells.
  • a spacer is provided between adjacent battery cells. The spacer isolates the direct contact between adjacent battery cells. At the same time, the existence of the spacer can separate the faulty cells in time, avoiding the damage of the faulty cells to its adjacent cells, and reducing the safety hazard of the entire battery module.
  • the spacer 104 is provided with a plurality of holes 105, and the holes 105 run through the spacer 104;
  • the battery module 100 also includes adhesive glue filled between two adjacent battery cells 103 , and the adhesive glue bonds the two adjacent battery cells 103 through the holes 105 .
  • the spacer 104 is provided with a plurality of holes 105 penetrating through the spacer 104, and the number and size of the holes 105 can be selected according to actual design requirements, which are not specifically limited in the embodiment of the present invention.
  • the adhesive glue can be plastic, silica gel and other materials with bonding, heat conduction, and insulation functions.
  • the adhesive glue can bond two adjacent battery cells 103 through the hole 105, which can The bonding ability between two adjacent battery cells 103 is improved, thereby improving the overall strength of the battery module 100 .
  • FIG. 2 is a structural schematic diagram of a separator provided by an embodiment of the present invention. greater than the thickness of the separator 104.
  • At least one side of the spacer 104 close to the cell 103 is provided with an elastic structure 106.
  • the number and arrangement of the elastic structures can be selected according to actual design requirements, which are not specifically limited in the embodiments of the present invention.
  • the elastic structure can be composed of insulating materials with good elasticity such as soft silica gel and rubber.
  • the elastic structure 106 has a certain thickness, and the thickness of the elastic structure 106 is greater than the thickness of the separator 104, which can increase the distance between the adjacent cells 103, so that there is enough expansion space between the cells 103 and 103, when When any cell 103 expands, due to the existence of the elastic structure 106, it can play a role of buffer protection and support protection, avoiding damage to the adjacent cell 103 due to expansion and extrusion, thereby ensuring the height of the cell 103. cycle life requirements.
  • the battery cell 103 further includes a third surface 1033 and a fourth surface 1034 oppositely disposed, and the third surface 1033 and the fourth surface 1034 are respectively connected to the first surface 1031 and the second surface 1032;
  • the battery module 100 includes a first metal sheet 117 and a second metal sheet 118; the first metal sheet 117 includes a first subsection 1171, a second subsection 1172 and a third subsection 1173, and the second subsection 1172 is respectively connected to the first subsection 1172.
  • the subsection 1171 is connected to the third subsection 1173;
  • the second metal sheet 118 includes a fourth subsection 1181, a fifth subsection 1182 and a sixth subsection 1183, and the fifth subsection 1182 is connected to the fourth subsection 1181 and the sixth subsection 1181, respectively.
  • Subdivision 1183 connection is
  • the first subsection 1171 and the fourth subsection 1181 are respectively connected to the first surface 1031, the second subsection 1172 is connected to the third surface 1033, the third subsection 1173 and the sixth subsection 1183 are connected to the second surface 1032, and the second subsection 1173 is connected to the second surface 1032.
  • the fifth subsection 1182 is connected to the fourth surface 1034 .
  • the battery module 100 includes a first metal sheet 117 and a second metal sheet 118, and the first subsection 1171, the second subsection 1172, and the third subsection 1173 of the first metal sheet 117 are bonded to the battery cell 103 by bonding glue.
  • the fourth subsection 1181, the fifth subsection 1182 and the sixth subsection 1183 of the second metal sheet 118 form a fixed connection with the battery cell 103 by glueing
  • the first metal sheet 117 and the second metal sheet 118 are The thin sheet made of metal has a relatively small thickness, so that the weight of the first metal sheet 117 and the second metal sheet 118 is relatively light.
  • the first metal sheet 117 and the second metal sheet 118 are arranged in fixed contact with the first surface 1031 , the second surface 1032 , the third surface 1033 and the fourth surface 1034 of the cell 103 , which effectively improves the safety of the cell module 100 At the same time, the overall weight and manufacturing cost of the cell module 100 are reduced.
  • the battery module 100 further includes a first binding member 119 and a second binding member 120 , and the first binding member 119 and the second binding member 120 are spaced between the first end fixing plate 101 and the second binding member.
  • the two ends fix the outer sides of the plate 102 , the first metal sheet 117 and the second metal sheet 118 .
  • the battery module 100 is also provided with a first binding member 119 and a second binding member 120, both of which are made of metal materials, so that the first binding member 119 and the second binding member 120 With a certain heat dissipation effect, the first binding member 119 and the second binding member 120 are arranged at intervals on the outside of the first end fixing plate 101, the second end fixing plate 102, the first metal sheet 117 and the second metal sheet 118, For the first end fixing plate 101 , the second end fixing plate 102 , the first metal sheet 117 , the second metal sheet 118 and the cell between the first end fixing plate 101 and the second end fixing plate 102 103 plays a certain fixing role, thereby ensuring the safety and reliability of the overall structure of the battery module 100 .
  • FIG 3 is a schematic structural view of another battery module provided by an embodiment of the present invention, as shown in Figure 3, optionally, the battery cell 103 includes a first surface 1031 and a second surface 1032 oppositely arranged, and the first surface 1031 A positive pole tab 107 and a negative pole tab 108 are provided;
  • the battery module 100 also includes a first insulating plate 109 located on the side of the first surface 1031 away from the second surface 1032 , the first insulating plate 109 is provided with a positive pole tab connection end 1091 and a negative pole tab connection end 1092 ;
  • the positive tab 107 is electrically connected to the positive tab connection end 1091
  • the negative tab 108 is electrically connected to the negative tab connection end 1092 .
  • each cell 103 includes a first surface 1031 and a second surface 1032 oppositely arranged, the first surface 1031 is provided with a positive pole tab 107 and a negative pole tab 108, and the positive pole tab 107 and the negative pole tab 108 are arranged at intervals , respectively located at the two symmetrical ends of the battery cell 103, avoiding the risk of short circuit in the positive tab 107 and the negative tab 108, while ensuring the heat dissipation effect of the positive tab 107 and the negative tab 108; the battery module 100 also includes 1031 is the first insulating plate 109 on the side away from the second surface 1032.
  • the first insulating plate 109 can be used to accommodate copper plates, aluminum plates, nickel-plated copper plates or other conductive bars to realize direct serial or parallel connection to the conductive bars.
  • the first insulating plate 109 is provided with a positive pole lug connecting end 1091 and a negative pole lug connecting end 1092, and the positive pole lug 107 on the first surface 1031 of each cell 103 can connect with the first insulating plate 109 through the corresponding conductive row.
  • the positive tab connection end 1091 is correspondingly electrically connected, and the negative tab 108 of the first surface 1031 of each cell 103 can be electrically connected to the negative tab connection end 1092 of the first insulating plate 109 through a corresponding conductive row, so as to Ensure that the first insulating plate 109 converges the output current of each battery cell 103 , and ensure that the current output is uniform and stable.
  • the battery module 100 further includes a second insulating plate 110 located on the side of the first insulating plate 109 away from the first surface 1031 ,
  • the first surface 1031 is provided with a pressure relief valve 111;
  • the first insulating plate 109 is provided with a first pressure relief hole 112;
  • the second insulating plate 110 is provided with a second pressure relief hole 113;
  • the first pressure relief hole 112 , the second pressure relief hole 113 and the pressure relief valve 111 are provided correspondingly.
  • the second insulating plate 110 is arranged on the side away from the first surface 1031 of the first insulating plate 109, the area of the second insulating plate 110 is close to the area of the first insulating plate 109, and the second insulating plate 110 covers the first insulating plate 109, and play a certain protective role for the first insulating plate 109, avoiding the risk of exposure of the first insulating plate 109.
  • the first surface 1031 of each cell 103 in the battery module 100 is provided with a pressure relief valve 111.
  • the pressure relief valve 111 can be arranged between the positive tab 107 and the negative tab 108.
  • the first surface of the cell 103 The central position of 1031 avoids the impact of the positive pole tab 107 and the negative pole tab 108 during the pressure relief process.
  • Corresponding to the first insulating plate on the side of the first surface 1031 is provided with a first pressure relief hole 112, and the second insulating plate 110 on the side of the first insulating plate 110 away from the first surface 1031 is provided with a second pressure relief hole 113, And the first pressure relief hole 112, the second pressure relief hole 113 and the pressure relief valve 111 are provided correspondingly, the vertical projections of the first pressure relief hole 112 and the second pressure relief hole 113 on the first surface 1031 of the cell 103 all cover The pressure relief valve 111 on the first surface 1031 of the battery cell 103 .
  • the pressure relief valve 111 of the battery cell 103 is opened to release the internal pressure of the battery cell 103, and the liquid released by the pressure relief valve 111 of the battery cell 103 passes through the second
  • the first pressure relief hole 112 of an insulating plate 109 and the second pressure relief hole 113 of the second insulating plate 110 are discharged to avoid damage to the adjacent electric core 103 and the positive pole lug connection end 1091 of the first insulating plate 109 and The negative tab connection 1092 is damaged.
  • the second insulating plate 110 includes movable insulating ear caps 114 , and the movable insulating ear caps 114 respectively cover the positive pole tab connection end 1091 and the negative pole tab connection end 1092 .
  • the second insulating plate 110 is provided with movable insulating ear caps 114 at positions corresponding to the positive pole lug connection end 1091 and the negative pole lug connecting end 1092 of the first insulating plate 109, and the movable insulating ear caps 114 cover the positive pole lug connection respectively.
  • the movable insulating ear cover 114 can be opened without using During installation, the movable insulating ear cover 114 can be easily covered to prevent the movable insulating ear cover 114 from being lost or lost, and the positive pole lug connection end 1091 and the negative pole pole lug connection end 1092 of the first insulating plate 109 lose protection. Further, the safety of the battery module 100 is ensured.
  • the first insulating board 109 includes a low-voltage plug-in 115
  • the second insulating board 110 includes a low-voltage plug-in protection cover 116
  • the low-voltage plug-in protection cover 116 covers the low-voltage plug-in 115 .
  • the first insulating plate 109 is provided with a low-voltage plug-in 115, and the low-voltage plug-in 115 is used to realize the connection between the battery management system of the battery module 100 and the signal acquisition system, so that the voltage of the battery cell 103 collected by the signal acquisition system, Information such as temperature is transmitted to the battery management system, which is analyzed and judged by the battery management system to improve the utilization rate of the battery module 100, prevent the battery cells 103 in the battery module 100 from overcharging and overdischarging, and extend the battery life of the battery module 100. The service life of the battery module 100 is monitored to further ensure the safety of the battery module 100 .
  • FIG. 4 is a schematic structural diagram of a battery module provided by an embodiment of the present invention. As shown in FIG. 4 , the battery module further includes a connecting rod 121 and a fastener 122;
  • the side of the second insulating plate 110 away from the first insulating plate 109 is provided with a connecting rod slot 123, the connecting rod 121 is fixedly connected with the connecting rod slot 123, and the fastener 122 is respectively connected to the first end through the connecting hole 1211 of the connecting rod 121.
  • the upper fixing plate 101 and the second end fixing plate 102 are connected.
  • two connecting rods 121 are exemplary provided in FIG. 110 is provided with a connecting rod slot 123 on the side away from the first insulating plate 109, and the connecting rod slot 123 is used to accommodate the connecting rod 121, so that the connecting rod 121 is fixedly connected with the connecting rod slot 123, and the fastener 122 passes through the connecting rod 121.
  • the connecting holes 1211 are respectively connected to the first end fixing plate 101 and the second end fixing plate 102, and the first end fixing plate 101 and the second end fixing plate 102 can also be provided with fastener fixing holes to The connection effect between the fastener 122 and the first end fixing plate 101 and the second end fixing plate 102 is ensured, thereby ensuring the overall strength and safety of the battery module 100 .

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

Les modes de réalisation de la présente invention concernent un module de batterie. Le module de batterie comprend une première plaque de fixation d'extrémité, une seconde plaque de fixation d'extrémité, une pluralité de cellules prises en sandwich entre la première plaque de fixation d'extrémité et la seconde plaque de fixation d'extrémité, et une feuille d'isolation entre deux cellules adjacentes, la feuille d'isolation étant utilisée pour isoler les deux cellules adjacentes, de sorte que lorsque l'une quelconque des cellules tombe en panne, la cellule peut être isolée au moyen de la feuille d'isolation, ce qui permet d'éviter d'endommager des cellules adjacentes.
PCT/CN2021/135376 2021-09-07 2021-12-03 Module de batterie WO2023035430A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202111043192.0 2021-09-07
CN202111043192.0A CN113764796A (zh) 2021-09-07 2021-09-07 一种电池模组

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Publication Number Publication Date
WO2023035430A1 true WO2023035430A1 (fr) 2023-03-16

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PCT/CN2021/135376 WO2023035430A1 (fr) 2021-09-07 2021-12-03 Module de batterie

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WO (1) WO2023035430A1 (fr)

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Publication number Priority date Publication date Assignee Title
CN115472971A (zh) * 2022-10-27 2022-12-13 维沃移动通信有限公司 电池和电子设备

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JP2013222656A (ja) * 2012-04-18 2013-10-28 Hitachi Maxell Ltd 電池積層体
CN205609583U (zh) * 2016-04-22 2016-09-28 宁德时代新能源科技股份有限公司 电池模组
WO2020026963A1 (fr) * 2018-07-30 2020-02-06 三洋電機株式会社 Système de batterie d'un véhicule, et véhicule équipé d'un système de batterie
CN209822769U (zh) * 2019-04-23 2019-12-20 东莞天予天正新能源科技有限公司 一种动力电池模组
CN112448077A (zh) * 2019-09-05 2021-03-05 三星Sdi株式会社 储能模块

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