WO2023187803A1 - Ensemble de modernisation pour bloc-batterie - Google Patents

Ensemble de modernisation pour bloc-batterie Download PDF

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Publication number
WO2023187803A1
WO2023187803A1 PCT/IN2023/050043 IN2023050043W WO2023187803A1 WO 2023187803 A1 WO2023187803 A1 WO 2023187803A1 IN 2023050043 W IN2023050043 W IN 2023050043W WO 2023187803 A1 WO2023187803 A1 WO 2023187803A1
Authority
WO
WIPO (PCT)
Prior art keywords
pcm
batery
battery pack
pack
funnel
Prior art date
Application number
PCT/IN2023/050043
Other languages
English (en)
Inventor
Kuchibhotla SARVANI
Kousik R SHYAM
Shree AYAN
Nileshwar Pramila Rao
Original Assignee
Tvs Motor Company Limited
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 Tvs Motor Company Limited filed Critical Tvs Motor Company Limited
Publication of WO2023187803A1 publication Critical patent/WO2023187803A1/fr

Links

Classifications

    • 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
    • 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
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/12—Recording operating variables ; Monitoring of operating variables
    • 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
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/547—Voltage
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/549—Current

Definitions

  • the present subject matter described herein generally relates to a battery pack for a vehicle. More specifically, the present disclosure relates to a retrofittable PCM pouring unit for pouring a phase change material (PCM) into the battery pack.
  • PCM phase change material
  • Lithium-ion battery pack is used as power source in electric vehicles and hybrid vehicles.
  • the battery pack comprises of a plurality of cylindrical cells that are interconnected in series and parallel arrangement to meet current, voltage and capacity requirements.
  • the charging and discharging of plurality of cells are being monitored and controlled by battery management system (BMS).
  • BMS battery management system
  • the series and parallel interconnections of the plurality of cylindrical cells present various technical problems. Due to high current charging and discharging, there may be excess heat generation causing melting of components and imbalance among the plurality of cylindrical cells which may cause fire in battery pack. Since, Lithium is highly reactive component, Lithium ion is relatively unstable in nature that poses a safety challenge which requires for specialized handling and operational requirements.
  • the battery pack generates significant amount of the heat during functioning, because of which the battery pack temperature can rise significantly. Eventually, the temperature can rise to a value where the battery pack can go into thermal runaway.
  • a good battery pack design should be capable of preventing thermal runaway. The design can be applied to pouch or prismatic cell depending on other requirements like space, current, voltage, weight, cost, and the like.
  • Thermal Pad is a heat-dissipation pad used to control the heat generated in the battery pack.
  • thermal pad is located between the battery module and a heat sink of outside of the battery pack. It transfers heat generated inside the battery pack to outside of the battery pack.
  • thermal pads specialized substrates are provided separately for heat dissipation and insulation. Thermal pads are not advantageous for cylindrical cells as it does not give proper contacts between the plurality of cells. Further, the thermal pads require different layer thickness at different spaces. Hence, the serviceability and assembling of the battery pack is cumbersome. Furthermore, the maximum temperature withstanding capability of the thermal pads is low.
  • the present invention relates to a battery pack comprising a retrofittable assembly for pouring a phase change material (PCM).
  • the retrofittable assembly comprises a lid, a funnel, and a gasket.
  • the lid is configured to hold the funnel.
  • the lid is placed on a top cover of the battery pack with the gasket.
  • the gasket is provided to avoid leakage of the PCM while pouring into the battery pack.
  • the funnel is configured to be placed on a base of the battery pack.
  • the base comprises a PCM filling port.
  • the funnel is attached to the PCM filling port for providing flow of PCM through the funnel into the battery pack.
  • Figure 1 illustrates a conventional battery pack in accordance with existing art.
  • Figure 2 illustrates an exploded view of a conventional battery pack, in accordance with existing art.
  • Figure 3 illustrates an exploded view of a conventional battery pack, in accordance with an existing art.
  • Figure 4 illustrates an exploded view of a battery pack, in accordance with an embodiment of the present subject matter.
  • Figure 5a and 5b illustrates a top view of battery pack, in accordance with an embodiment of the present subject matter.
  • Figure 6 illustrates a connection between a funnel and a PCM filling port, in accordance with an embodiment of the present subject matter.
  • Figure 7 illustrates a magnified view of the funnel, in accordance with an embodiment of the present subject matter.
  • Figure 8 illustrates a method of a attaching a retrofittable PCM pouring unit inside a battery pack, in accordance with an embodiment of the present subject matter.
  • This invention relates generally to battery power supply and, more particularly, to thermal management in such battery power supply systems.
  • the word “battery” here is meant to include various forms of electrochemical power generation which have chemical energy in common.
  • the chemical energy is in the form of one or more chemical reactants stored in a confined space, which react with each other or with an external reactant in an electrochemical reaction, so as to produce electric power when desired.
  • battery power supplies have been well established. For example, a plurality of cells are packaged together in a parallel or series configuration to form a battery module or pack for use as a power supply for personal electronic devices such as cell phones, laptop computers, camcorders or the like have become well-known and common.
  • desirable properties or characteristics of battery power supplies including, for example, the capability of certain battery power supplies to be recharged, makes such battery power supplies potential power sources for vehicle propulsion like electric vehicles (EV).
  • EV electric vehicles
  • temperature variations between individual cells can result from one or more of a variety of different factors including changes in ambient temperature, unequal impedance distribution among cells and differences in heat transfer efficiencies among cells.
  • Thermal management systems based on the use of active cooling (e.g., forced circulation of air, liquid or other selected cooling medium) have been proposed for use in conjunction with such battery power supply systems.
  • active cooling e.g., forced circulation of air, liquid or other selected cooling medium
  • the incorporation and use of such active cooling regimes may introduce a level of complexity in either or both power supply design and operation such as may hinder or prevent the more widespread use of such power supplies.
  • the required or desired size of a battery power supply is generally dependent on the specific application thereof.
  • certain contemplated or envisioned applications for such power supplies such as to power electric vehicles, for example, may necessitate the use of such power supplies which have or are of significantly larger physical dimensions that those commonly used or available.
  • thermal management in power supply systems can become even more critical or significant as the size of such cell, battery module, or battery pack is increased.
  • the Lithium-ion battery construction consists of an outer metal casing and a plastic cell holder in which plurality of cells are placed.
  • the battery pack generally consists of a plurality of cells.
  • the plurality of cells are placed on cell holder.
  • the plurality of cells in the plastic cell holder are placed apart at atypical distance of about 2mm.
  • the outer casing and plastic cell holder are placed apart with minimum of 1mm to 5mm air gap.
  • the number of cells in the battery pack may be increased or decreased.
  • the lithium-ion battery packs are equipped with battery management system (BMS) to prevent the malfunctioning caused inside the plurality of cells and to ensure that the series and parallel connected cells are operated in desired current, voltage and temperature range.
  • BMS battery management system
  • the cells may undergo thermal runaway causing fire and explosion.
  • the conventional battery construction is not equipped to protect from such failures.
  • the thermal management for Lithium-ion battery packs is important to avoid thermal runaway.
  • the increased temperature inside the battery pack can cause safety issues and decreases the life of battery pack.
  • a Phase Change Material (PCM) is filled inside the battery pack in between the plurality of cells.
  • the phase change material is liquid dispense gap filler material which is used to fill spaces between the plurality of cells, and the heat generated during the thermal runaway is absorbed using the heat absorbing property of the phase change process of the phase change material.
  • PCM phase changing materials
  • PCM battery pack
  • the electrical components getting in touch with PCM may cause damage to electrical components in long run.
  • the electrical components get degraded overtime due to spillage of PCM while filling it inside the battery pack.
  • filling up of entire battery pack with PCM may lead to increase in weight and cost of the battery pack.
  • PCM should be provided in a way that it is capable of maintaining battery at desired optimum temperature range thus improving range and life of the battery pack.
  • PCM phase change material
  • the solution needs to be retrofittable on a conventional battery pack for enabling ease of spillage free service of PCM.
  • the PCM being disposed along a thermal pathway within the battery cell assembly that transfers the heat generated by the battery cell away from the battery cell during operation.
  • a battery pack includes a battery module, a battery cell assembly that is a component of the battery module, and a battery cell of the battery cell assembly comprising a plurality of battery cells.
  • each of the plurality of the battery cells is configured to generate heat during operation.
  • the battery cell assembly further comprises a phase change material (PCM) disposed along a thermal pathway within the battery cell assembly that transfers the heat generated by each of the plurality of the battery cells away from the plurality of battery cells during operation. Further, the PCM is configured to absorb the heat generated by the plurality of battery cells to affect a phase change.
  • the PCM material is expected to bring down the temperature considerably during batery operation and prevents thermal runaway due to its ability to hold more heat energy (high latent heat capacity material). The increases the operating temperature band of the batery pack thus improving safety and the range of the vehicle.
  • a known quantity of Phase Change Material is preheated to a temperature where it is completely liquid.
  • the quantity being dependent on the batery pack design which depends on the type of cells, number of cells and other design parameters. Based on the heat generation from the cells, the volume of the required PCM can be determined and accordingly reduced or increased. Then, the liquid PCM is poured into the batery pack through a retrofitable PCM pouring unit which is being provided on the batery pack which enables filling in the empty spaces between the cylindrical / pouch cells.
  • the PCM pouring unit comprises a lid, a funnel, and a gasket and the PCM pouring unit being retrofitable on a conventional batery pack.
  • the lid of PCM pouring unit being configured to hold a funnel.
  • the lid being placed on a top cover of the batery pack with the gasket.
  • the gasket being provided to avoid leakage of the PCM material while being poured into the batery pack.
  • the funnel being configured to be placed on a base of the battery pack where the PCM filling port is available.
  • the base comprises a PCM filling port.
  • the funnel is attached to the PCM filling port and the funnel provides a directed flow of PCM through the funnel into the thermal pathway of the battery pack.
  • the PCM is gradually filled through the funnel into the battery pack to prevent air bubble formation inside the battery pack.
  • the funnel is inclined at an obtuse angle to prevent the PCM getting chocked inside the funnel.
  • the PCM pouring unit is detachably attached to the battery pack.
  • PCM is a hydrocarbon material with a phase transition temperature in a range of 30°C to 70°C.
  • the lid is made up of metal and the base is made of plastic.
  • the PCM being preheated separately to a predetermined temperature before pouring PCM into the battery pack where a predetermined temperature being 5°C to 10°C greater than a phase transition temperature of the PCM but less than 85°C, the predetermined temperature range depends on the battery pack design.
  • FIG. 1 illustrates a conventional battery pack 100.
  • a battery pack 100 comprises of a top cover 104, a bottom cover 107, an aluminium casing 106.
  • the top cover 104 has a lid 103.
  • the metal that is used in the lid 103 is aluminium.
  • a lid holder 102 is also provided in the top cover 104.
  • the lid 103 is provided to pour the phase change material into the battery pack 100.
  • the lid 103 is fastened to the top cover 104 with the help of fasteners.
  • a safety valve 101 is also provided in the top cover 104.
  • Figure.2 illustrates an exploded view of a conventional battery pack 100 without the battery cell assembly 111.
  • a battery pack 100 comprises of a top cover 104, interconnectors, interconnector dampers, with plastic cell holder 105, an aluminium casing 106, and a bottom cover 107.
  • FIG.3 illustrates an exploded view of a conventional battery pack 100.
  • the top cover 104 is having a lid 103.
  • a PCM fdling port 108 is provided on the base member 109.
  • the base member 109 also provides space to hold battery management system (BMS) (not labelled).
  • BMS battery management system
  • the base member 109 is also capable of holding a PCB 110.
  • the PCB 110 is used to sense the temperature and voltage inside the battery pack 100.
  • a battery cell assembly 111 which includes the cell holder 105 capable of holding the plurality of battery cells, is also provided inside the aluminium casing 106.
  • a bottom cover 107 is provided to seal the battery pack from the bottom.
  • the battery pack has the lid 103 through which PCM 502 can be poured but it will cause spillage.
  • PCM 502 material may cause damage to the electrical components provided nearby inside the battery pack 100.
  • a three component retrofittable PCM pouring unit 411 is provided to enable gradually pouring of PCM inside the battery pack to avoid formation of air bubble and spillage of PCM on nearby electrical components inside the battery pack.
  • FIG.4 illustrates an exploded view of a battery pack 400 in the present exemplary embodiment.
  • the battery pack 400 includes a battery module 409 which comprises of one or more of the battery cell assembly I l l, interconnectors (not labelled) and dampers (not shown).
  • the top cover 405 includes the retrofittable PCM pouring unit 411, the retrofittable PCM pouring unit 411 comprises of a lid 401 with a slot 402 to fluidically attach a funnel 404.
  • the lid 401 is made of aluminium.
  • the current invention of three component retrofittable PCM pouring unit 411 is capable of avoiding spillage on the electrical components thereby avoiding undesirable contact with PCM 502.
  • the retrofittable PCM pouring unit 411 has a lid 401 combined with gasket 403. Both the lid 401 and the gasket 403 are detachable attached to the slot 405 ’ provided for the lid 401 in the top cover 405.
  • a first end 404A of the funnel 404 having an engaging portion 4041, is attached and a second end 404B of the funnel 404 being inserted into a PCM filling port 406 of the plastic base 407 as shown in figure 6.
  • Detailed drawings of the lid 401, gasket 403 and the funnel 404 being connected together is shown in figure 6.
  • the funnel 404 is configured with an engaging portion 4041 having an opening to fluidically engage with the filling slot 402, the engaging portion 4041 is followed downstream by a first conduit portion 4042 extending at a first angle x (shown in Figure 7), said first angle x being with reference to an entry axis AA’ of the engaging portion 4041.
  • the angle x can be 180 degrees implying first conduit portion 4042 being substantially parallel to the entry axis AA’ .
  • the funnel 404 is provided with a second conduit portion 4043 at the downstream side which is oriented at a second angle y (shown in Figure 7) with reference to the entry axis AA’ .
  • the second conduit portion 4043 makes an obtuse angle y with the entry axis AA’ .
  • Said obtuse angle y being greater than 90° enables smooth flow of the PCM 502 material while filling and avoids any undesirable choking in the funnel 404.
  • one or more of the engaging portion 4041, first conduit portion 4042 and the second conduit portion 4043 may be separately formed or integrally formed.
  • FIG.5a and 5b illustrates the top view of battery pack 400.
  • the battery pack 400 comprises a plurality of cells 501 in the present exemplary embodiment.
  • the plurality of cells 501 may be cylindrical or pouch cells.
  • the gaps in between the cells 501 are filled with the PCM 502 material to absorb the heat generated in cells during battery operation.
  • the known quantity of PCM 502 is preheated separately to a predetermined temperature.
  • the pre-determined temperature being 5°C to 10°C greater than a phase transition temperature of the PCM but less than 85°C.
  • the quantity of PCM 502 material being poured in the battery pack 400 depends on the battery pack design.
  • the battery pack design further depends on type of cells and other design parameters.
  • volume of the required PCM 502 inside the battery pack 400 may be determined and accordingly reduced or increased. Then, PCM 502 is poured into the battery pack 400 and is allowed to fill in the empty spaces between the cylindrical or pouch cells 501. The PCM 502 absorbs heat generated by cells 501 thus increasing the operating range of the battery pack 400. PCM 502does not allow the battery pack 400 to go beyond operating temperatures, thus improving safety in terms of drastically rise in temperature of the battery pack 400.
  • PCM 502 Due to lower temperature in the battery pack 400, PCM 502 naturally cools down and solidifies after filling the empty gaps in the pack.
  • the typical duration of PCM 502 getting solidified is around 30 minutes to 1 hours at an ambient temperature between a range of 30 °C to 35 °C.
  • the PCM 502 has high latent heat and hence absorbs the heat produced in the cells 501 during charging and discharging operation and thus PCM 502 material helps in bringing down the temperature considerably during battery operation, thus improving life and range of the pack 400.
  • FIG.6 illustrates the connection between the funnel 404 and the PCM filling port 406 in the present exemplary embodiment.
  • the retrofittable PCM pouring unit 411 comprises the lid 401 combined with the gasket 403.
  • the retrofittable PCM pouring unit 411 is placed in the slot 405 ’provided in the top cover 405.
  • the funnel 404 is inserted into the PCM filling port 406 of the plastic base 407.
  • the PCM filling port 406 then directs the PCM 502 towards the thermal pathway inside the battery pack 400 where the PCM 502 is filled between the gaps inside the cell 501.
  • the retrofittable PCM pouring unit 411 is detachably attached to the battery pack 400.
  • Figure.7 illustrates the magnified view of funnel 404 in the present exemplary embodiment.
  • the funnel 404 is inclined at an obtuse angle to prevent the PCM getting choked inside the funnel 404.
  • the angles x and y should be more than 90 degrees and less than 180 degrees.
  • the retrofitable pouring unit 411 comprises of the lid 401 , the gasket 403 and the funnel 404,
  • the lid 401 is attached on the top cover 405 of the batery pack 400 with the help of an adhesive or fasteners (step 801),
  • the gasket 403 is provided between the lid 401 and the funnel 404. to prevent the leakage while pouring the PCM (step 802),
  • Safety Valve 109 Base member
  • Lid 111 Batery Cell Assembly
  • Top Cover 400 Batery pack 105: Cell holder 401: Lid
  • Botom Cover 30 403 Gasket
  • Second end 10 408 PCB
  • Engaging portion 409 Battery Module

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

La présente invention concerne un bloc-batterie (400) comprenant une unité de versement de PCM de modernisation (411) pour verser un matériau à changement de phase (PCM) à l'intérieur d'un bloc-batterie (400). L'unité de versement de PCM de modernisation (411) comprend un couvercle (401), un entonnoir (404) et un joint d'étanchéité (403). Le couvercle (401) est placé sur un capot supérieur (405) du bloc-batterie (400). Le joint d'étanchéité (403) est disposé entre le couvercle (401) et un entonnoir (404), et l'entonnoir (404) est inséré dans un orifice de remplissage de PCM (406) du bloc-batterie (400). La présente invention fournit une conception améliorée d'un bloc-batterie qui permet une facilité de service, est fiable, sans fuite et sûre pour verser un matériau à changement de phase (PCM) dans un bloc-batterie, ce qui permet de protéger des composants électriques contre un endommagement indésirable.
PCT/IN2023/050043 2022-03-27 2023-01-16 Ensemble de modernisation pour bloc-batterie WO2023187803A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN202241017711 2022-03-27
IN202241017711 2022-03-27

Publications (1)

Publication Number Publication Date
WO2023187803A1 true WO2023187803A1 (fr) 2023-10-05

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4400450A (en) * 1981-07-27 1983-08-23 Allied Corporation Battery vent
EP3340368B1 (fr) * 2016-05-31 2018-11-28 LG Chem, Ltd. Cellule de batterie comprenant un matériau à changement de phase

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4400450A (en) * 1981-07-27 1983-08-23 Allied Corporation Battery vent
EP3340368B1 (fr) * 2016-05-31 2018-11-28 LG Chem, Ltd. Cellule de batterie comprenant un matériau à changement de phase

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