WO2021150156A1 - Système de charge de bloc-batterie, chargeur de bloc-batterie et procédé de charge d'un bloc-batterie - Google Patents

Système de charge de bloc-batterie, chargeur de bloc-batterie et procédé de charge d'un bloc-batterie Download PDF

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Publication number
WO2021150156A1
WO2021150156A1 PCT/SE2021/050014 SE2021050014W WO2021150156A1 WO 2021150156 A1 WO2021150156 A1 WO 2021150156A1 SE 2021050014 W SE2021050014 W SE 2021050014W WO 2021150156 A1 WO2021150156 A1 WO 2021150156A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery pack
battery
charger
air stream
battery charger
Prior art date
Application number
PCT/SE2021/050014
Other languages
English (en)
Inventor
Andreas Johansson
Pär MARTINSSON
Micael RACOV
Original Assignee
Husqvarna Ab
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 Husqvarna Ab filed Critical Husqvarna Ab
Priority to CN202180007858.9A priority Critical patent/CN114902520A/zh
Priority to DE112021000176.0T priority patent/DE112021000176T5/de
Publication of WO2021150156A1 publication Critical patent/WO2021150156A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • H02J7/00036—Charger exchanging data with battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
    • H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
    • H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
    • H02J13/00026—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission involving a local wireless network, e.g. Wi-Fi, ZigBee or Bluetooth
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20—Smart grids as enabling technology in buildings sector
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission

Definitions

  • the present disclosure relates to a battery pack charging system comprising a battery charger and a battery pack receivable in the battery charger for charging of the battery pack.
  • the battery charger comprises charger electronics and a fan arrangement for cooling said charger electronics with an air stream, and the air stream is guided from the battery pack to the battery charger for cooling the battery pack.
  • the present disclosure further relates to a corresponding battery charger, and a method for controlling a battery charger in a battery pack charging system.
  • Such battery pack charger systems may be used for instance to charge battery packs used in power tools. Thanks to the guiding of the air stream from the battery pack, keeping the battery pack’s temperature down during charging, charging can be more powerful which reduces the charging time.
  • the battery charger is configured generate a reverse air stream, wherein the reverse air stream is guided from the battery charger to the battery pack. This may be used when the battery pack has recently been discharged, and due to this is too hot to be charged.
  • the reverse air stream serves to quicker cool the temperature of the battery pack as the air stream being pushed towards the battery has been proven to be more powerful, and the air is not pre-heated during this period as the charging electronics is switched off, or at least produces less heat than during full charging.
  • the battery pack can reach an allowed charging temperature, where charging can commence, quicker, which makes charging overall more efficient.
  • the battery charger may comprise a communication unit adapted to receive a temperature indication from the battery pack. This allows the charger to adapt to the battery temperature, remaining in a cooling phase mode as long as necessary and subsequently switching to a charging phase mode. Thus, if a received temperature indication, typically an over-temperature flag, indicates that a battery temperature exceeds a threshold, the reverse air stream is generated.
  • a received temperature indication typically an over-temperature flag
  • the reverse air stream may be generated for a predetermined time period when the battery pack is connected to the battery charger. This requires no communication between the battery pack and the charger.
  • the reverse air stream is generated until an indication is received that the battery pack has reached a threshold temperature. Then the charging phase commences.
  • the reverse air stream may pass a heat sink in the battery pack.
  • the present disclosure also considers a battery charger for a battery pack receivable in the battery charger, wherein the battery charger comprises charger electronics and a fan arrangement for cooling the battery pack and the charger electronics with an air stream.
  • the battery charger is adapted to suck the air stream from a connected battery pack for cooling the battery pack.
  • the battery charger is further configured to temporarily generate a reverse air stream, whereby the reverse air stream is guided towards the battery pack from the battery charger.
  • the present disclosure further considers a method for controlling a battery charger in a battery pack charging system, the battery charger being adapted to charge a battery pack receivable in the battery charger.
  • the battery charger comprises charger electronics and a fan arrangement for cooling said charger electronics with an air stream.
  • the battery charger operates in a cooling phase mode, generating a reverse air stream, wherein the reverse air stream is guided from the battery charger to the battery pack, and in a charge phase mode, generating an air stream wherein the air stream is guided from the battery pack towards a battery charger.
  • Fig 1 A shows a perspective view of a battery charger.
  • Fig 1 B shows a perspective view of a battery pack.
  • Figs 2A and 2B illustrate a battery pack charging system operating in a charge mode phase and a cooling mode phase.
  • Fig 3 and 4 are flowcharts illustrating different examples of methods for controlling a battery charger in a battery pack charging system.
  • the present disclosure relates generally to a battery pack charging system.
  • the battery pack charging system includes a battery charger 1 and a battery pack 3 which are illustrated in fig 1 A and fig 1 B, respectively.
  • the battery pack 3 may typically be a 36V or 48V battery pack although other voltages of course are possible in this context, e.g.18V, 72V or 96V.
  • the battery pack is used in a power tool such as a chain saw, which may be sold with two or more battery packs, such that one may be ready for use when the other needs charging.
  • the battery charger therefore comprises a slot 5 with an electric connector 7, where the slot 5 has a shape adapter for mating with a corresponding portion of the battery pack 3 while the electric connector 7 of the battery charger 1 mates with a corresponding connector on the battery pack 3, as is well known per se.
  • a fan arrangement in the battery charger which forces an air stream 25 through the housing 10 of the battery charger 1 , from inlets 9 to outlets 11 formed in its housing 10.
  • the air stream inlets 9 may be formed in the slot 5 in the battery charger 1 , receiving the battery pack 3.
  • a battery pack 3 is inserted in the slot 5, it is therefore possible to further suck the air stream 25 through an inlet 15 in the battery pack 3, which inlet in the illustrated example is located on the top thereof, through a channel in the battery pack 3, and making the air stream 25 exit through an outlet 17 on the battery pack, which outlet 17 is in register with the battery charger 1 inlet 9.
  • This allows the air stream 25 to cool also the battery pack 3 during charging which makes it possible to charge the battery pack 3 quicker.
  • This may be further improved by providing heat sinks in the battery pack 3 that reaches into the air stream.
  • a configuration with a slot 5 in the battery charger 1 is not necessary, but the inlets 9 of the charger preferably should register at least partly with the outlets 17 of the battery pack 3, although other ways of leading the air stream 25 from the battery pack 3 to the battery charger 1 in principle are conceivable.
  • the present disclosure adds a further feature to such a charging system 1 , 3.
  • Discharging of a battery pack 3 during use e.g. of a power tool radically increases its inner temperature.
  • the inner temperature of the battery pack may reach a level that is so high that charging cannot be carried out without risking damaging the battery pack 3 or at least shorten ing its number of cycles life. Therefore, solutions have been considered where the battery pack 3 communicates an over-temperature condition to the battery charger 1 , and the battery charger postpones charging until an allowed temperature condition has been met in the battery pack 3.
  • the time until a battery pack 3 with an over-temperature condition can be charged is reduced, without risking damaging the battery pack 3.
  • a cooling phase mode in addition to the charging phase mode during which the battery pack 3 is charged.
  • Figs 2A and 2B illustrate a battery pack charging system operating in a charging phase mode and a cooling phase mode, respectively.
  • the fan arrangement 23 operates in the normal direction, forcing an air flow 25 through at least one top inlet 15 of the battery pack 3, passing through the battery pack 3, and then exiting through the outlets 17 of the battery pack 3 which are in register with corresponding inlets 9 of the battery charger 1 .
  • the air stream 25 cools battery cells 29 therein, typically by means of heat sinks 31 reaching into the air stream 25.
  • the air streams 25 enter the battery charger through the inlets 9, pass through the battery charger housing 10 and exit through the outlets 11 , and electronics 21 therein is cooled by the air streams 25.
  • the air streams 25 are forced in this way by means of a fan arrangement 23, typically including an electric motor.
  • the charging system 1, 3 operates with the fan in reverse, thus temporarily making inlets of outlets and vice-versa.
  • Fig 3 and 4 are flowcharts illustrating different examples of methods for controlling a battery charger 1 in a battery pack charging system.
  • fig 3 it is presumed that the battery pack 3 inserted in the battery charger 1 is too hot, and thus, when the battery pack is connected, the system enters a cooling phase mode 43, cooling the battery pack 3 quicker as illustrated in fig 2B.
  • a pre-determ ined time it is presumed that the battery is cool enough to begin charging, and the battery charger system reverses into the charging phase mode 45, as illustrated in fig 2A. This is a simple solution as the charger does not need to evaluate the battery pack temperature.
  • the battery charger and the battery pack may include communication units 27, as illustrated in fig 2A-B.
  • Such communication units may be based on radio, e.g. a BLUETOOTH interface, or may be optical or may simply communicate via the charging connectors of the charging system.
  • the battery pack 3 may then deliver either its actual temperature or an over temperature flag. In any case, it is determined 47 whether the battery pack’s temperature exceeds a threshold, Tb>Tt indicating an over-temperature condition, and, if so, the system may enter a cooling phase 43 mode as described. Then, it may periodically be tested 47 whether the over-temperature condition persists or whether the system can enter the charging phase mode 45. Alternatively, the system may remain in the cooling phase mode for a predetermined time period or a time period determined based on the actual temperature. As yet an alternative, interrupts may handle transitions between different modes.
  • the battery charger 1 may include means for measuring the battery pack’s temperature e.g. using a pyrometer.
  • the present disclosure is not limited to the above-described examples and may be varied and altered in different ways within the scope of the appended claims.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

La présente divulgation concerne un système de charge de bloc-batterie comprenant un chargeur de batterie (1) et un bloc-batterie (3) pouvant être reçu dans le chargeur de batterie destiné à charger le bloc-batterie. Le chargeur de batterie comprend une électronique de chargeur (21) et un agencement de ventilateur (23) servant à refroidir l'électronique de chargeur par un courant d'air (25), et le courant d'air est conduit du chargeur de batterie au bloc-batterie afin de refroidir également le bloc-batterie. Un courant d'air inversé (25') qui peut être produit se déplace dans la direction opposée, ce qui permet de refroidir principalement le bloc-batterie (3).
PCT/SE2021/050014 2020-01-23 2021-01-13 Système de charge de bloc-batterie, chargeur de bloc-batterie et procédé de charge d'un bloc-batterie WO2021150156A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202180007858.9A CN114902520A (zh) 2020-01-23 2021-01-13 电池组充电系统、电池组充电器及用于对电池组进行充电的方法
DE112021000176.0T DE112021000176T5 (de) 2020-01-23 2021-01-13 Ladesystem für batteriepacks, ladegerät für batteriepacks und verfahren zum laden eines batteriepacks

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE2050059-1 2020-01-23
SE2050059 2020-01-23

Publications (1)

Publication Number Publication Date
WO2021150156A1 true WO2021150156A1 (fr) 2021-07-29

Family

ID=76992402

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2021/050014 WO2021150156A1 (fr) 2020-01-23 2021-01-13 Système de charge de bloc-batterie, chargeur de bloc-batterie et procédé de charge d'un bloc-batterie

Country Status (3)

Country Link
CN (1) CN114902520A (fr)
DE (1) DE112021000176T5 (fr)
WO (1) WO2021150156A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023043841A1 (fr) * 2021-09-16 2023-03-23 Lunar Energy, Inc. Régulation de la température cellulaire

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0940864A2 (fr) * 1998-03-05 1999-09-08 Black & Decker Inc. Système de refroidissement pour paquet de batteries
GB2449444A (en) * 2007-05-22 2008-11-26 Mobiletron Electronics Co Ltd Battery charger having a fan
US20150303531A1 (en) * 2012-11-23 2015-10-22 Husqvarna Ab Apparatus for providing battery pack cooling
WO2017083405A1 (fr) * 2015-11-09 2017-05-18 Gogoro Inc. Systèmes et procédés de gestion thermique de dispositifs de stockage d'énergie électrique portatifs
US20190036350A1 (en) * 2016-04-05 2019-01-31 Adam Gleason Apparatus, system, and method for battery charging

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0940864A2 (fr) * 1998-03-05 1999-09-08 Black & Decker Inc. Système de refroidissement pour paquet de batteries
GB2449444A (en) * 2007-05-22 2008-11-26 Mobiletron Electronics Co Ltd Battery charger having a fan
US20150303531A1 (en) * 2012-11-23 2015-10-22 Husqvarna Ab Apparatus for providing battery pack cooling
WO2017083405A1 (fr) * 2015-11-09 2017-05-18 Gogoro Inc. Systèmes et procédés de gestion thermique de dispositifs de stockage d'énergie électrique portatifs
US20190036350A1 (en) * 2016-04-05 2019-01-31 Adam Gleason Apparatus, system, and method for battery charging

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023043841A1 (fr) * 2021-09-16 2023-03-23 Lunar Energy, Inc. Régulation de la température cellulaire
US11973205B2 (en) 2021-09-16 2024-04-30 Lunar Energy, Inc. Cell temperature regulation

Also Published As

Publication number Publication date
CN114902520A (zh) 2022-08-12
DE112021000176T5 (de) 2022-09-15

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