WO2022041800A1 - 探测网、电池单体、电池模组及电动汽车 - Google Patents

探测网、电池单体、电池模组及电动汽车 Download PDF

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Publication number
WO2022041800A1
WO2022041800A1 PCT/CN2021/089039 CN2021089039W WO2022041800A1 WO 2022041800 A1 WO2022041800 A1 WO 2022041800A1 CN 2021089039 W CN2021089039 W CN 2021089039W WO 2022041800 A1 WO2022041800 A1 WO 2022041800A1
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WO
WIPO (PCT)
Prior art keywords
battery
detection
lead
tray
detection net
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Application number
PCT/CN2021/089039
Other languages
English (en)
French (fr)
Inventor
谭晶
张永明
丁勋峰
Original Assignee
比亚迪股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 比亚迪股份有限公司 filed Critical 比亚迪股份有限公司
Priority to JP2023513364A priority Critical patent/JP2023538691A/ja
Priority to KR1020237009050A priority patent/KR20230051556A/ko
Priority to EP21859647.6A priority patent/EP4203140A1/en
Publication of WO2022041800A1 publication Critical patent/WO2022041800A1/zh
Priority to US18/173,737 priority patent/US20230207913A1/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • 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
    • 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
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • 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
    • H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
    • 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
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/117—Inorganic material
    • H01M50/119—Metals
    • 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
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • 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
    • 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

  • the present application relates to the technical field of power supply equipment, and in particular, the present application relates to a detection net, a battery cell, a battery module and an electric vehicle.
  • the battery cell is the smallest unit of the battery. During the operation of the battery, it is difficult for the battery management system to monitor the operation of each battery cell at any time, especially the leakage of electrolyte in the battery cell is difficult to detect in time. Case. During the operation of the battery, if the electrolyte is not discharged from the battery in time after leakage, it is likely to cause the battery to short circuit or even catch fire and explode.
  • the present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a detection net, which makes the monitoring of liquid leakage and water inflow of a battery cell simpler and more convenient.
  • a detection net comprising: a first conductive part and a second conductive part
  • the first conductive part includes a first lead-out part and a plurality of first protruding parts arranged side by side on the first lead-out part
  • the The second conductive part includes a second lead-out part and a plurality of second projecting parts arranged side by side on the second lead-out part, and the plurality of first projecting parts and the plurality of second projecting parts intersect in sequence set and separated from each other.
  • the plurality of first protruding parts and the plurality of second protruding parts are spaced apart from each other in a normal state, and the adjacent first protruding parts and the second protruding parts are communicated by conductors
  • the first conductive part is connected to the second conductive part, it can play a good monitoring role.
  • a battery cell includes a casing, a cell assembly and the detection net described in the above embodiments; the cell assembly is arranged in the casing, the cell assembly includes at least one cell, and the detection The mesh insulation is arranged between the casing and the cell assembly; a connection port is provided on the casing, and the first lead-out portion and the second lead-out portion are both electrically connected to the connection port.
  • a battery module comprising at least one battery, a BMS system, a tray, and the detection net described in the above embodiments; the battery is arranged in the tray, and the detection network is insulated from the battery and the tray Between the bottom surfaces, the first lead-out portion and the second lead-out portion are both electrically connected to the BMS system.
  • An electric vehicle includes the battery module described in the above embodiments.
  • FIG. 1 is a schematic structural diagram of a detection network provided by an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a disassembled structure of a battery cell according to an embodiment of the present application
  • FIG. 3 is a schematic structural diagram of a detection network for a battery cell according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of an assembly structure of a battery cell according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of the assembly of a detection net of a battery cell and a cell assembly provided by an embodiment of the present application;
  • Fig. 6 is the enlarged view of A place in Fig. 5;
  • FIG. 7 is a schematic diagram of a disassembled structure of a battery module provided by an embodiment of the present application.
  • FIG. 8 is a schematic diagram of a disassembled structure of a battery module provided by an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of the cooperation between a battery and a detection net of a battery module according to an embodiment of the present application.
  • FIG. 10 is a side view of the cooperation between a battery and a detection net of a battery module provided by an embodiment of the present application.
  • Fig. 11 is an enlarged view at B in Fig. 10;
  • FIG. 12 is a schematic diagram of an electric vehicle according to an embodiment of the application.
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as “first” or “second” may expressly or implicitly include one or more of that feature. Further, in the description of the present application, unless otherwise specified, "plurality" means two or more.
  • an embodiment of the present application provides a detection network 3, including:
  • the first conductive part includes a first lead-out part 311 and a plurality of first protruding parts 3111 arranged side by side on the first lead-out part 311
  • the second conductive part includes a first lead-out part 311 .
  • Two lead-out portions 312 and a plurality of second projecting portions 3121 arranged side by side on the second lead-out portion 312 , a plurality of first projecting portions 3111 and a plurality of second projecting portions 3121 are sequentially intersected and spaced apart from each other, similar to The two combs face each other, and the teeth of the two combs are inserted into each other's structure.
  • the plurality of first protruding parts 3111 and the plurality of second protruding parts 3121 intersect in sequence and are spaced apart from each other, so as to avoid a short circuit between the first conductive part and the second conductive part.
  • the first conductive part and the The second conductive portion is not turned on.
  • the adjacent first protruding parts 3111 and the second protruding parts 3121 are connected through conductors, the first conductive parts and the second conductive parts are connected.
  • the detection net 3 is applied to a battery cell, when the battery cell has the problem of electrolyte leakage or water ingress of the battery cell, the distance between the first protruding portion 3111 and the second protruding portion 3121 is relatively small.
  • the first protruding part 3111 and the second protruding part 3121 will be connected. At this time, the signal connected by the first conductive part and the second conductive part can be output externally, which is convenient for the battery cell. Leakage or water ingress monitoring.
  • the detection net 3 provided in the embodiment of the present application includes a plurality of first protruding parts 3111 and a plurality of second protruding parts 3121 which are arranged to cross each other, and the plurality of first protruding parts 3111 are connected side by side on the first leading part 311 , the plurality of second protruding parts 3121 are connected side by side on the second lead-out part 312, the plurality of first protruding parts 3111 and the plurality of second protruding parts 3121 are spaced apart from each other under normal conditions, and
  • the protruding part 3111 and the second protruding part 3121 are connected by a conductor, the first conductive part and the second conductive part are connected, and the connection signal of the first conductive part and the second conductive part can monitor the above-mentioned conductors (ie, leakage, leakage, etc.).
  • the presence or absence of water entering the battery cell ensures the monitoring function of the detection network 3 .
  • the structures of the first conductive portion and the second conductive portion are the same.
  • first conductive part and the second conductive part are the same, and the first lead-out part 311 and the second lead-out part 312 have the same structural dimensions, for example, they are both linear, and the first protruding part 3111 and the second lead-out part 311
  • the number of protruding parts 3121 is the same, a plurality of first protruding parts 3111 can be evenly arranged on the first lead-out part 311, a plurality of second protruding parts 3121 can be evenly arranged on the second lead-out part 312, a plurality of first protruding parts 3111
  • the protruding portion 3111 and the plurality of second protruding portions 3121 intersect in sequence and are arranged at intervals from each other, which can ensure the detection uniformity and stability of the detection net 3 .
  • an embodiment of the present application further provides a battery cell 11 , including:
  • the cell assembly 2 is arranged in the casing 1 .
  • the cell assembly 2 is disposed in the accommodating cavity formed by the casing 102 and the cover plate 103 , the cell assembly 2 includes at least one cell 201 , and the detection net 3 is insulated between the casing 1 and the cell assembly 2 , In order to avoid a short circuit between the first conductive part and the second conductive part of the detection net 3 .
  • the casing 1 is provided with a connection port 101 , and both the first lead-out portion 311 and the second lead-out portion 312 are electrically connected to the connection port 101 .
  • the connection port 101 may be arranged on the cover plate 103, the connection port 101 is convenient for outputting the parameter information in the battery cell 11 to the outside, and the opening is convenient for the insertion and removal of the cell assembly 2, and the cell assembly 2 includes at least one cell 201. .
  • the number of the battery cells 201 may be one, two, three, four, five or more. In the case where the number of the battery cells 201 is multiple, the multiple battery cells 201 may be arranged in series, or It may be set in parallel, or may be set in a combination of parallel and series, which is not limited in this embodiment of the present application.
  • the battery cells 11 provided by the embodiments of the present application detect the first conductive part and the second conductive part in the net 3, so that when the battery cells 11 have problems of electrolyte leakage or water ingress of the battery cells 11, the electrolyte or Conductive liquid such as water conducts the first protruding part 3111 and the second protruding part 3121.
  • the connection port 101 outputs the conduction information, the electrolyte leakage of the battery cell 11 or the leakage of the battery can be quickly and easily found.
  • the problem of water ingress of the cells 11, and the maintenance of the battery cells 11 in a timely manner ensures the safety and stability of the operation of the battery cells 11.
  • the detection net 3 is arranged around the cell assembly 2 .
  • the cover plate 103 can be placed with one side up, or the cover plate 103 can be placed with one side facing the side.
  • the battery cells The electrolyte leakage of 11 may appear on the bottom surface, or may appear on the side or above, and after the detection net 3 is placed around the battery core assembly 2, there is no discussion on the direction of the electrolyte leakage of the battery cell 11, and the detection net 3 is all.
  • the liquid leakage can be monitored in time to ensure the safe use of the battery cells 11 .
  • the detection net 3 can also be laid between the battery core assembly 2 and the bottom surface of the casing 1 .
  • a first insulating layer 4 is provided between the casing 1 and the detection net 3 .
  • the first insulating layer 4 can be arranged between the detection net 3 and the casing 1, and the first insulating layer 4 can be arranged between the detection net 3 and the casing 1.
  • An insulating layer 4 can avoid a short circuit caused by contact between the detection net 3 and the housing 1 .
  • the density of the crossed arrangement of the first protruding portion 3111 and the second protruding portion 3121 is positively correlated with the detection accuracy of the detection net 3 .
  • the battery cell 11 When the battery cell 11 has the problem of electrolyte leakage or water ingress of the battery cell 11, it is necessary to pass the conductive liquid such as electrolyte or water between the first protrusion 3111 and the second protrusion 3121 to connect the two. on.
  • the battery cell 11 When the first protruding portion 3111 and the second protruding portion 3121 are arranged sparsely in cross, the battery cell 11 may suffer from electrolyte leakage or water ingress in the initial stage of the battery cell 11 due to the relatively small amount of conductive liquid such as electrolyte or water. Small, it is not enough to conduct the first protruding part 3111 and the second protruding part 3121 in time.
  • the first protruding part 3111 and the second protruding part 3121 Only when the amount of conductive liquid such as electrolyte or water is large, the first protruding part 3111 and the second protruding part 3121 The detection accuracy of the detection net 3 is low; When the intersections are densely arranged, the first protruding part 3111 and the second protruding part 3121 can be connected in time by the conductive liquid such as electrolyte or water at the initial stage of electrolyte leakage or water ingress of the battery cells. , that is, when the first protruding parts 3111 and the second protruding parts 3121 are arranged densely intersecting, the detection accuracy of the detection net 3 is high.
  • the detection net 3 is a metal detection net.
  • the material of the metal detection net can be a metal with good conductivity such as silver, copper, gold, aluminum, tungsten, nickel or iron, which can improve the detection sensitivity of the detection net 3; in addition, the detection net 3 may need to surround Around the cell assembly 2, the material of the metal detection net can be selected from metal materials with good ductility such as silver, gold, aluminum, and tungsten.
  • the first insulating layer 4 is a plastic insulating layer or a rubber insulating layer.
  • Plastic or rubber materials have good insulating properties, and have high structural strength and toughness, which can provide stable structural support for the detection net 3 .
  • the detection net 3 can be adhered to the surface of the first insulating layer 4, and at this time, the detection net 3 and the first insulating layer 4 can be closely attached, which improves the structural compactness of the detection net 3, and the first The insulating layer 4 can be used as a support carrier of the detection network 3 to avoid structural dislocation between the first conductive part and the second conductive part of the detection network 3 , and to ensure the detection stability of the detection network 3 .
  • the cell assembly 2 further includes an insulating support 202 disposed at the end of the cell 201 .
  • the ends of the cells 201 are generally provided with connection terminals.
  • the connection terminals of the cells 201 are easy to connect with other battery cells.
  • the connection of the cells 201 The terminals are connected to other cells 201 , and when the connection terminals are close to the detection network 3 , there is a risk of short-circuiting between the connection terminals and the detection network 3 .
  • the insulating support 202 can insulate and support the connection terminal.
  • the embodiment of the present application further provides a battery module 100 , including at least one battery, a BMS system, a tray 12 and a battery cell 11 .
  • an embodiment of the present application further provides a battery module 100 , including at least one battery, a BMS system, a tray 12 and a detection net 3 ;
  • the battery is arranged in the tray 12 , the detection net 3 is insulated and arranged between the battery and the tray 12 , and the battery is electrically connected to the BMS system through the connection port 101 .
  • the BMS system can obtain the operating parameters of the battery in the battery module 100, and control the operation of the battery, such as the detection and control of parameter information such as the charging and discharging voltage and operating temperature of the battery.
  • the battery may be the battery cell 11 in the above-mentioned embodiment, and the first lead-out portion 311 and the second lead-out portion 312 are electrically connected to the BMS system through the connection port 101 .
  • the BMS system when electrolyte leakage occurs in the battery cell 11 , the BMS system obtains the first protruding portion 3111 and the second protruding portion through the connection port 101 3121 conduction information, so as to monitor the electrolyte leakage problem inside the battery cell 11 and send a feedback signal in time.
  • the BMS system includes an alerting component. After the BMS system obtains the conduction information of the first protruding part 3111 and the second protruding part 3121, it can already judge that the electrolyte leakage occurs inside the battery cell 11. At this time, the BMS system can issue an alarm prompt through the alarm component.
  • the alarm prompt can be a sound alarm, or the alarm information can be displayed on the display screen of the electric vehicle 200, so that the user can deal with the liquid leakage problem in time and ensure the safety of the electric vehicle 200 and the user.
  • the battery module 100 further includes a second insulating layer 13 , and the second insulating layer 13 is arranged around the battery.
  • the detection net 3 is insulated between the battery and the tray 12 , and the casing of the battery is mostly a metal casing. In order to ensure the insulation between the detection net 3 and the battery, a second insulating layer 13 can be provided around the battery.
  • a third insulating layer 14 may be provided between the tray 12 and the detection net 3 .
  • the tray 12 is an insulating tray, the direct contact between the detection net 3 and the tray 12 will not cause a short circuit between the first conductive part and the second conductive part in the detection net 3, so the first conductive part and the second conductive part in the detection net 3 will not be short-circuited.
  • the arrangement of the three insulating layers 14 .
  • Embodiments of the present application further provide an electric vehicle 200, including the battery module 100 in the above-mentioned embodiments.
  • the battery module 100 can quickly and conveniently find the problem of electrolyte leakage in the battery module 100 or water ingress of the battery cells in the battery module 100 through the detection network 3, and then repair the battery module 100 in time to ensure that The safety and stability of the electric vehicle 200 are improved.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Transportation (AREA)
  • Inorganic Chemistry (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)
  • Cell Separators (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

一种探测网(3)、电池单体(11)、电池模组(100)及电动汽车(200)，该探测网(3)包括第一导电部和第二导电部，所述第一导电部包括第一引出部(311)和并排设置在所述第一引出部(311)上的多个第一凸出部(3111)，所述第二导电部包括第二引出部(312)和并排设置在所述第二引出部(312)上的多个第二凸出部(3121)，多个所述第一凸出部(3111)和多个所述第二凸出部(3121)依次交叉并相互间隔设置。

Description

探测网、电池单体、电池模组及电动汽车
相关申请的交叉引用
本申请要求比亚迪股份有限公司于2020年08月24日提交的、申请名称为“探测网、电池单体、电池模组及电动汽车”的、中国专利申请号“202021786853.X”的优先权。
技术领域
本申请涉及电源设备技术领域，具体地，本申请涉及一种探测网、电池单体、电池模组及电动汽车。
背景技术
随着人们环保意识的不断增强，越来越多的电动汽车走进了人们的视野。电池作为电动汽车的主要动力组件，对电动汽车的长期稳定运行起着关键的作用。
电池单体作为电池的最小单位，在电池的运行过程中，电池管理系统很难对每个电池单体的运行情况都做到随时监测，特别是对电池单体中电解液泄露等难以及时发现的情况。在电池的运行过程中，电解液在泄露后如不及时从电池中排出，很可能会导致电池短路甚至起火爆炸。
发明内容
本申请旨在至少解决现有技术中存在的技术问题之一。为此，本申请提出一种探测网，所述探测网使电池单体的漏液以及进水监测更加简单、方便。
一种探测网，包括：第一导电部和第二导电部，所述第一导电部包括第一引出部和并排设置在所述第一引出部上的多个第一凸出部，所述第二导电部包括第二引出部和并排设置在所述第二引出部上的多个第二凸出部，多个所述第一凸出部和多个所述第二凸出部依次交叉设置并相互隔开。
由此，多个第一凸出部和多个第二凸出部在正常状态下相互间隔开，而在相邻所述第一凸出部和所述第二凸出部之间通过导体连通时，所述第一导电部和第二导电部连通，可以起到很好的监测作用。
一种电池单体，包括壳体、电芯组件和上述实施例中所述的探测网；所述电芯组件设置于所述壳体内，所述电芯组件包括至少一个电芯，所述探测网绝缘设置于所述壳体和电芯组件之间；所述壳体上设置有连接端口，所述第一引出部和所述第二引出部均电连接至所述连接端口。
一种电池模组，包括至少一个电池、BMS系统、托盘和上述实施例中所述的探测网；所述电池设置于所述托盘内，所述探测网绝缘设置于所述电池和所述托盘的底面之间，所述第一引出部和所述第二引出部均电连接至所述BMS系统。
一种电动汽车，包括上述实施例中所述的电池模组。
本申请的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本申请的实践了解到。
附图说明
本申请的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1为本申请实施例提供的一种探测网的结构示意图；
图2为本申请实施例提供的一种电池单体的拆分结构示意图；
图3为本申请实施例提供的一种电池单体的探测网结构示意图；
图4为本申请实施例提供的一种电池单体的装配结构示意图；
图5为本申请实施例提供的一种电池单体的探测网与电芯组件装配的结构示意图；
图6为图5中A处的放大图；
图7为本申请实施例提供的一种电池模组的拆分结构示意图；
图8为本申请实施例提供的一种电池模组的拆分结构示意图；
图9为本申请实施例提供的一种电池模组的电池和探测网配合的结构示意图；
图10为本申请实施例提供的一种电池模组的电池和探测网配合的侧视图；
图11为图10中B处的放大图；
图12为本申请实施例提供的一种电动汽车的示意图。
具体实施方式
下面详细描述本申请的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本申请，而不能理解为对本申请的限制。
在本申请的描述中，需要理解的是，术语“中心”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
需要说明的是，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。进一步地，在本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上。
参照图1至图11，本申请实施例提供了一种探测网3，包括：
第一导电部和第二导电部，参见图1，第一导电部包括第一引出部311和并排设置在第一引出部311上的多个第一凸出部3111，第二导电部包括第二引出部312和并排设置在第 二引出部312上的多个第二凸出部3121，多个第一凸出部3111和多个第二凸出部3121依次交叉并相互间隔设置，类似于两个梳子相对，两个梳子的梳齿插入彼此的结构。
具体地，多个第一凸出部3111和多个第二凸出部3121依次交叉并相互间隔设置，可以避免第一导电部和第二导电部之间的短路，这时第一导电部和第二导电部并未导通。当相邻第一凸出部3111和第二凸出部3121之间通过导体连通时，第一导电部和第二导电部便连通。比如在探测网3应用于电池单体中时，当电池单体出现电解液泄露或电池单体进水的问题时，由于第一凸出部3111和第二凸出部3121之间间距较小，电解液泄露或电池单体进水后会将第一凸出部3111和第二凸出部3121连通，这时第一导电部和第二导电部连通的信号可以对外输出，便于电池单体的漏液或者进水监测。
本申请实施例提供的探测网3包括相互交叉设置的多个第一凸出部3111和多个第二凸出部3121，而且多个第一凸出部3111并排连接在第一引出部311上，多个第二凸出部3121并排连接在第二引出部312上，多个第一凸出部3111和多个第二凸出部3121在正常状态下相互间隔开，而在相邻第一凸出部3111和第二凸出部3121之间通过导体连通时，第一导电部和第二导电部连通，第一导电部和第二导电部的连通信号可以监测上述导体(即漏液、进入电池单体的水)的有无，保证探测网3的监测作用。
在一些实施例中，第一导电部和第二导电部的结构相同。
具体而言，第一导电部和第二导电部的结构相同可以理解为，第一引出部311和第二引出部312的结构尺寸相同，比如均呈线形，第一凸出部3111和第二凸出部3121的数量相同，多个第一凸出部3111可以均匀排列在第一引出部311上，多个第二凸出部3121可以均匀排列在第二引出部312上，多个第一凸出部3111和多个第二凸出部3121依次交叉并相互间隔设置，可以保证探测网3的探测均匀性和稳定性。
参见图2至图6，本申请实施例还提供了一种电池单体11，包括：
壳体1、电芯组件2和上述探测网3，壳体1包括外壳102和盖板103，外壳102至少一侧具有开口，盖板103盖设于开口处。电芯组件2设置于壳体1内。
具体而言，电芯组件2设置于外壳102和盖板103形成的容纳腔内，电芯组件2包括至少一个电芯201，探测网3绝缘设置于壳体1和电芯组件2之间，以避免探测网3的第一导电部和第二导电部之间的短路。
壳体1上设置有连接端口101，第一引出部311和第二引出部312均电连接至连接端口101。可以是连接端口101设置于盖板103上，连接端口101便于将电池单体11内的参数信息对外输出，开口便于电芯组件2的放入和取出，电芯组件2包括至少一个电芯201。
其中，电芯201的数量可以为一个、两个、三个、四个、五个或者更多，电芯201的数量为多个的情况下，多个电芯201之间可以串联设置，也可以并联设置，还可以是并联与串联的组合设置，本申请实施例对此不做限制。
本申请实施例提供的电池单体11通过探测网3中的第一导电部和第二导电部，可以在电池单体11出现电解液泄露或电池单体11进水的问题时，电解液或水等导电液体将第一凸出部3111和第二凸出部3121导通，在连接端口101将这一导通信息对外输出后，可以 快速便捷的发现电池单体11的电解液泄露或电池单体11进水的问题，进而及时对电池单体11进行维修，保证了电池单体11运行的安全性和稳定性。
参见图5和图6，探测网3包绕电芯组件2设置。
在实际使用过程中，由于电池单体11的排布方式多种多样，比如可以将盖板103的一侧朝上放置，也可以将盖板103的一侧朝向侧面放置，这时电池单体11的电解液泄露可能出现在底面，也有可能出现在侧面或者上面，而将探测网3包绕电芯组件2设置后，无论述电池单体11的电解液泄露的方向如何，探测网3均可以对漏液进行及时监测，保证电池单体11的使用安全。另外，如果电池单体11的排布方式在制备时已经确定，也可以将探测网3铺设在电芯组件2和壳体1的底面之间。
参见图3和图4，壳体1为金属壳体的情况下，壳体1与探测网3之间设置有第一绝缘层4。
可以理解的是，壳体1为金属壳体时，为了保证壳体1和探测网3之间良好的绝缘性，可以将第一绝缘层4设置于探测网3和壳体1之间，第一绝缘层4可以避免探测网3和壳体1之间因为接触而导致的短路。
第一凸出部3111和第二凸出部3121交叉设置的疏密程度与探测网3的探测精度正相关。
电池单体11在出现电解液泄露或电池单体11进水的问题时，需要通过电解液或水等导电液体处于第一凸出部3111和第二凸出部3121之间才可以将两者导通。当第一凸出部3111和第二凸出部3121交叉设置的较为稀疏时，电池单体11在出现电解液泄露或电池单体进水的初期，由于电解液或水等导电液体的量较小，还不足以将第一凸出部3111和第二凸出部3121及时导通，只有在电解液或水等导电液体的量较多时，第一凸出部3111和第二凸出部3121才能够被导通，即第一凸出部3111和第二凸出部3121交叉设置的较为稀疏时，探测网3的探测精度较低；当第一凸出部3111和第二凸出部3121交叉设置的较为密集时，电池单体在出现电解液泄露或电池单体进水的初期，电解液或水等导电液体便可以将第一凸出部3111和第二凸出部3121及时导通，即第一凸出部3111和第二凸出部3121交叉设置的较为密集时，探测网3的探测精度较高。
在一些实施例中，探测网3为金属探测网。具体地，金属探测网的材质可以为银、铜、金、铝、钨、镍或铁等导电性较好的金属，可以提高探测网3的探测灵敏性；另外，由于探测网3可能需要包围在电芯组件2的周围，金属探测网的材质可以选择银、金、铝、钨等延展性较好的金属材料。
第一绝缘层4为塑料绝缘层或者橡胶绝缘层。塑料或者橡胶材料均具有较好的绝缘性能，而且结构强度和韧性高，可以提供给探测网3稳定的结构支撑。
在一些实施例中，探测网3可以粘接于第一绝缘层4的表面，这时探测网3和第一绝缘层4可以紧密贴合，提高了探测网3的结构紧凑性，而且第一绝缘层4可以作为探测网3的支撑载体，避免探测网3的第一导电部和第二导电部之间结构错位，保证了探测网3的探测稳定性。
参见图2，电芯组件2还包括设置于电芯201端部的绝缘支架202。
电芯201的端部一般设置有连接端子，电芯201的数量为一个时，电芯201的连接端子便于与其他电池单体连接，电芯201的数量为多个时，电芯201的连接端子与其他电芯201连接，连接端子在靠近探测网3时，存在连接端子与探测网3之间接触短路的风险。而绝缘支架202的设置可以对连接端子起到绝缘和支撑的作用。
本申请实施例还提供了一种电池模组100，包括至少一个电池、BMS系统、托盘12和电池单体11。
参见图7至图11，本申请实施例还提供了一种电池模组100，包括至少一个电池、BMS系统、托盘12和探测网3；
电池设置于托盘12内，探测网3绝缘设置于电池和托盘12之间，电池通过连接端口101电连接至BMS系统。
BMS系统(Battery Management System，电池管理系统)可以获取电池模组100内电池的运行参数，并对电池的运行进行控制，比如对电池的充放电电压、运行温度等参数信息进行检测和控制。
电池可以为上述实施例中的电池单体11，第一引出部311和第二引出部312通过连接端口101与BMS系统电连接。
参见图10和图11，本申请实施例提供的电池模组100，在电池单体11内发生电解液泄露时，BMS系统通过连接端口101来获得第一凸出部3111和第二凸出部3121的导通信息，从而监测到电池单体11内部发生电解液泄漏问题并及时发出反馈信号。
在一些实施例中，BMS系统包括报警组件。BMS系统在获得第一凸出部3111和第二凸出部3121的导通信息后，已经可以判断电池单体11内部发生电解液泄漏，这时BMS系统可以通过报警组件对外发出报警提示，该报警提示可以是声音报警，或者是通过电动汽车200上的显示屏来显示报警信息，使得用户可以及时处理漏液问题，保证电动汽车200及用户的安全。
参见图7和图8，电池模组100还包括第二绝缘层13，第二绝缘层13包绕电池设置。
探测网3绝缘设置于电池和托盘12之间，而电池的壳体大多为金属壳体，为了保证探测网3和电池之间的绝缘性，可以在电池的周围设置第二绝缘层13。
参见图7，托盘12为金属托盘的情况下，为了保证托盘12与探测网3之间的绝缘性，可以在托盘12与探测网3之间设置第三绝缘层14。另外，参见图8，托盘12为绝缘托盘的情况下，探测网3与托盘12直接接触后也不会引起探测网3中第一导电部和第二导电部的短路，因此可省去了第三绝缘层14的设置。
本申请实施例还提供了一种电动汽车200，包括上述实施例中的电池模组100。
具体地，电池模组100可以通过探测网3来快速便捷的发现电池模组100内电解液泄露或电池模组100内电池单体进水的问题，进而及时对电池模组100进行维修，保证了电动汽车200运行的安全性和稳定性。
尽管已经示出和描述了本申请的实施例，本领域的普通技术人员可以理解：在不脱离 本申请的原理和宗旨的情况下可以对这些实施例进行多种变化、修改、替换和变型，本申请的范围由权利要求及其等同物限定。

Claims (14)

  1. 一种探测网(3)，其特征在于，包括：
    第一导电部和第二导电部，所述第一导电部包括第一引出部(311)和并排设置在所述第一引出部(311)上的多个第一凸出部(3111)，所述第二导电部包括第二引出部(312)和并排设置在所述第二引出部(312)上的多个第二凸出部(3121)，多个所述第一凸出部(3111)和多个所述第二凸出部(3121)依次交叉并相互间隔设置。
  2. 根据权利要求1所述的探测网，其特征在于，所述第一导电部和第二导电部的结构相同。
  3. 一种电池单体(11)，包括壳体(1)和电芯组件(2)，其特征在于，所述电池单体还包括如权利要求1或2所述的探测网(3)；
    所述电芯组件(2)设置于所述壳体(1)内，所述电芯组件(2)包括至少一个电芯(201)，所述探测网(3)绝缘设置于所述壳体(1)和电芯组件(2)之间；
    所述壳体(1)上设置有连接端口(101)，所述第一引出部(311)和所述第二引出部(312)均电连接至所述连接端口(101)。
  4. 根据权利要求3所述的电池单体(11)，其特征在于，所述探测网(3)包绕所述电芯组件(2)设置。
  5. 根据权利要求3-4中任一项所述的电池单体(11)，其特征在于，所述壳体(1)为金属壳体，所述壳体(1)与所述探测网(3)之间设置有第一绝缘层(4)。
  6. 根据权利要求3-5中任一项所述的电池单体(11)，其特征在于，所述壳体(1)包括外壳(102)和盖板(103)，所述外壳(102)至少一侧具有开口，所述盖板(103)盖设于所述开口处，所述连接端口(101)设置于所述盖板(103)上。
  7. 根据权利要求3-6中任一项所述的电池单体(11)，其特征在于，所述第一凸出部(3111)和所述第二凸出部(3121)交叉设置的疏密程度与所述探测网(3)的探测精度正相关。
  8. 一种电池模组(100)，包括至少一个电池、BMS系统和托盘(12)，其特征在于，所述电池模组还包括如权利要求1或2所述的探测网(3)；
    所述电池设置于所述托盘(12)内，所述探测网(3)绝缘设置于所述电池和所述托盘(12)之间，所述第一引出部(311)和所述第二引出部(312)均电连接至所述BMS系统。
  9. 根据权利要求8所述的电池模组(100)，其特征在于，所述电池通过连接端口(101)与所述BMS系统电连接。
  10. 根据权利要求8或9所述的电池模组(100)，其特征在于，还包括第二绝缘层(13)，所述第二绝缘层(13)包绕所述电池设置。
  11. 根据权利要求10所述的电池模组(100)，其特征在于，所述托盘(12)为绝缘托盘。
  12. 根据权利要求10所述的电池模组(100)，其特征在于，所述托盘(12)为金属托盘，所述托盘(12)与所述探测网(3)之间设置有第三绝缘层(14)。
  13. 一种电池模组(100)，包括至少一个电池、BMS系统和托盘(12)，其特征在于：所述电池为权利要求3至7任一项所述的电池单体。
  14. 一种电动汽车(200)，其特征在于，包括权利要求8-13中任一项所述的电池模组(100)。
PCT/CN2021/089039 2020-08-24 2021-04-22 探测网、电池单体、电池模组及电动汽车 WO2022041800A1 (zh)

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EP21859647.6A EP4203140A1 (en) 2020-08-24 2021-04-22 Detection net, battery cells, battery module and electric vehicle
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EP1722217A1 (en) * 2004-02-26 2006-11-15 Origin Electric Company Ltd Acid liquid leak sensor
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