WO2021115227A1 - 电池包及包括电池包的电动工具系统和充电系统 - Google Patents

电池包及包括电池包的电动工具系统和充电系统 Download PDF

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Publication number
WO2021115227A1
WO2021115227A1 PCT/CN2020/134292 CN2020134292W WO2021115227A1 WO 2021115227 A1 WO2021115227 A1 WO 2021115227A1 CN 2020134292 W CN2020134292 W CN 2020134292W WO 2021115227 A1 WO2021115227 A1 WO 2021115227A1
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WIPO (PCT)
Prior art keywords
battery pack
vent
housing
battery
casing
Prior art date
Application number
PCT/CN2020/134292
Other languages
English (en)
French (fr)
Inventor
曾林
闫明星
Original Assignee
苏州宝时得电动工具有限公司
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Filing date
Publication date
Application filed by 苏州宝时得电动工具有限公司 filed Critical 苏州宝时得电动工具有限公司
Priority to EP20897917.9A priority Critical patent/EP4075571A4/en
Publication of WO2021115227A1 publication Critical patent/WO2021115227A1/zh
Priority to US17/835,740 priority patent/US20220344741A1/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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/651—Means for temperature control structurally associated with the cells characterised by parameters specified by a numeric value or mathematical formula, e.g. ratios, sizes or concentrations
    • 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
    • H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • 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
    • H01M10/488—Cells or batteries combined with indicating means for external visualization of the condition, e.g. by change of colour or of light density
    • 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
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • 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
    • H01M10/623—Portable devices, e.g. mobile telephones, cameras or pacemakers
    • H01M10/6235—Power tools
    • 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
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/643—Cylindrical 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H01M10/6557—Solid parts with flow channel passages or pipes for heat exchange arranged between the 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6561—Gases
    • H01M10/6563—Gases with forced flow, e.g. by blowers
    • 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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6561—Gases
    • H01M10/6566—Means within the gas flow to guide the flow around one or more cells, e.g. manifolds, baffles or other barriers
    • 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
    • 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
    • H01M50/204—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
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • 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
    • H01M50/247—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for portable devices, e.g. mobile phones, computers, hand tools or pacemakers
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/296—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by terminals of battery packs
    • 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
    • H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
    • 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

  • the invention relates to a battery pack and an electric tool system and a charging system including the battery pack.
  • the longitudinal axis of the battery core is perpendicular to the vertical direction, especially for large-capacity battery packs, where the number of battery cells is large, resulting in the overlapping arrangement of the battery cores in the vertical direction. And the more the number of battery cells, the more overlap. In the natural state, the heat generated by the cell will be transferred from bottom to top. When the above arrangement is adopted, it will cause the higher the temperature of the battery cell in the vertical direction, which will make the battery work worse and affect the battery life.
  • the problem to be solved by the present invention is to provide a battery pack with good heat dissipation effect, and an electric tool system and a charging system including the battery pack.
  • the present invention provides a battery pack, including: a battery pack shell; a battery pack set in the battery pack shell, the battery pack includes a plurality of electrically connected battery cells; the battery pack shell includes The upper part of the housing and the lower part of the housing opposite to the upper part of the housing, the lower part of the housing is provided with a first vent, the upper part of the housing is provided with a second vent, and the longitudinal direction of the battery is along the battery
  • the upper and lower directions of the package shell are arranged vertically, a heat dissipation channel connecting the first vent and the second vent is formed in the battery package, and at least part of the outer peripheral surface of the battery core is located in the heat dissipation channel. In this way, the heat dissipation channel runs through the longitudinal direction of the battery core, and the area for cooling the battery core is larger and the cooling effect is better.
  • the battery cell group has a plurality of battery core groups, and the plurality of battery cell groups are arranged in the longitudinal direction of the battery core.
  • the battery cell group is arranged in this way, the cooling air can reach each battery cell to the maximum extent, ensuring that the battery core can be evenly cooled.
  • the first vent includes a plurality of first vents
  • the second vent includes a plurality of vents
  • the sum of any cross-sectional area of the plurality of first vents and the plurality of second vents is sum
  • the ratio of the cross-sectional area of the battery cell group is not less than 0.2.
  • the battery pack further includes a middle portion of the casing disposed between the upper portion of the casing and the lower portion of the casing, and the middle portion of the casing is provided with a third vent.
  • the ventilation volume of the cooling air can be increased to obtain a better cooling effect of the battery pack.
  • the battery cell group includes a bracket for fixing the battery cells, the bracket is provided with a plurality of openings, and the openings are in communication with the heat dissipation channel.
  • the opening connected to the heat dissipation channel is opened in the bracket, so that the cooling air can directly contact the surface of the electric core, and the cooling effect is better.
  • an air deflector is protrudingly provided on the side of the bracket close to the battery, and the air deflector can change the airflow direction in the heat dissipation channel, so that the cooling air can be directed toward the battery with a higher temperature. Flow to achieve uniform cooling of the cells.
  • the battery pack housing is provided with a handle for holding, and the handle includes a first end and a second end respectively connected to the battery pack housing, and connecting the first end and The grip portion of the second end, the handle has flexibility so that the distance between the grip portion and the battery pack housing can be changed. In this way, the portability of the battery pack can be greatly improved, the reliability of the handle can be improved, and the operator's hand can be accommodated in a smaller space, so that the overall size of the battery pack can be smaller.
  • the handle is made of rubber material.
  • the battery pack further includes an adapting part for connecting with an external device, and an unlocking part for unlocking the position of the battery pack and the external device.
  • the unlocking portion is located on one side of the handle, and the minimum horizontal distance between the unlocking portion and the handle is not greater than 85 mm.
  • the battery pack further includes a power display part for displaying the power of the battery pack, and the power display part and the adapting part are located on the same side of the battery pack.
  • the adapting part and the unlocking part are located on opposite sides of the battery pack.
  • the surface of the battery pack housing on which the handle is provided is provided with a concave surface and an edge surface surrounding the concave surface, and the concave surface is away from the grip portion relative to the edge surface, and The projection of the grip on the concave surface at least partially overlaps with the concave surface.
  • the first end and the second end are respectively arranged on the edge surface.
  • the distance between the holding portion and the concave surface is between 14-17 mm.
  • the battery pack is detachably slidably connected to an external device along the longitudinal direction of the battery core.
  • the battery pack includes an adapting part for connecting with an external device along a sliding direction
  • the adapting part is provided on a side of the battery pack housing
  • the adapting part includes a pair of sliding parts along the sliding direction.
  • Slide rails or slide grooves extending in parallel directions, the distance between a pair of slide rails or slide grooves is defined as a first width, the outermost boundary of the side portion has a second width perpendicular to the sliding direction, and the first width
  • the ratio to the second width is between 0.47-0.52.
  • the range of the second width is between 64-71 mm. This arrangement can not only ensure the compact structure of the battery pack, but also ensure that the battery pack is firmly connected to the external device.
  • the length of the sliding rail or the sliding groove is defined as a first height
  • the outermost boundary of the side portion has a second height parallel to the sliding direction
  • the ratio of the first height to the second height Between 0.48-0.5.
  • the adapting part further includes a first terminal groove and a second terminal groove extending in parallel along the longitudinal direction of the battery core, and a positive terminal for electrical connection with the external device received in the first terminal groove, And a negative terminal housed in the second terminal slot for electrical connection with the external device.
  • This setting can make the connection between the battery pack and the external device more stable and reliable.
  • first terminal groove and the second terminal groove are located between a pair of sliding rails or sliding grooves, and the center distance between the first terminal groove and the second terminal groove is 37-42 mm. This arrangement can ensure the space for realizing the electrical connection between the battery pack and the external device.
  • the battery pack further includes an unlocking part that unlocks the position of the battery pack and the external device, and the unlocking part is disposed on the other side of the battery pack opposite to the adapting part.
  • This setting is convenient for the operator when unlocking the battery pack or inserting the battery pack, the force of the battery pack is more balanced.
  • the battery pack is provided with a handle, and the unlocking part is arranged close to the handle, so that a hand holding the handle can simultaneously operate the unlocking part.
  • the operator can complete the two actions of holding the battery pack and unlocking with one hand at the same time, and remove the battery pack from the external device while unlocking.
  • the handle has flexibility, so that the distance between the handle and the battery pack housing can be changed when the handle is held. This is not only comfortable to hold, but also saves the overall height of the battery pack.
  • the battery pack further includes a power display part for displaying the power of the battery pack, and the power display part and the adapting part are arranged on the same side of the battery pack. This facilitates the wiring of the circuit board inside the battery pack, saving space and cost.
  • the adapting part does not exceed the outermost boundary of the side part. This makes the shape of the battery pack square and compact.
  • the present invention also provides an electric tool system, including an electric tool main body, the electric tool main body including a tool housing, a motor housed in the tool housing, and an output part driven by the motor, the electric tool system further includes the above
  • the tool housing includes a receiving portion for accommodating at least part of the battery pack
  • the battery pack is detachably connected to the main body of the electric tool
  • the battery pack provides power for the motor.
  • the receiving portion includes a bottom surface configured to be opposite to the lower part of the housing, the bottom surface is provided with a first vent hole, and the first vent hole can be air-conducted with the first vent hole. In this way, it will not be blocked by the main body of the power tool in the vertical direction, and an effective heat dissipation channel can be formed from bottom to top.
  • the cooling air enters the battery pack for cooling in the shortest distance without losing air volume, and has a better cooling effect on the battery core.
  • the airflow can enter the first vent through the gap, and flow through at least a part of the outer peripheral surface of the battery cell to flow out from the second vent.
  • the airflow can enter the battery pack from the gap without being blocked by the main body of the power tool.
  • the battery pack further includes a middle part of the housing arranged between the upper part of the housing and the lower part of the housing, the middle part of the housing is provided with a third vent, and the electric tool housing further includes
  • the receiving part includes a side surface opposite to the middle part of the housing, and the side surface is provided with a second vent hole.
  • the fan The generated airflow includes: a first airflow, sucked in from the first vent and flowing to the third vent; a second airflow, sucked in from the second vent, and flowing to the third vent; An airflow and a second airflow merge at the third vent, and then flow out from the second vent.
  • the battery pack housing is provided with a power display part for displaying the power of the battery pack, and when the battery pack is connected to the main body of the electric tool, the power display part is exposed to the receiving part. This is convenient for observing the power of the battery pack during use.
  • the battery pack further includes a locking portion and an unlocking portion, the locking portion is used to lock the position of the battery pack and the power tool main body, and the unlocking portion is used to release the gap between the battery pack and the power tool main body.
  • the position is locked, and the unlocking part is exposed to the receiving part. This makes it easy for the operator to remove the battery pack from the receiving part.
  • the present invention also provides a charging system, including a charger, the charger includes a charger housing, a charging circuit arranged in the charger housing, and the charging system further includes the battery pack as described above.
  • the charger housing includes a receiving portion for accommodating at least a part of the battery pack, the battery pack is detachably connected to the charger, and when the battery pack is connected to the charger, the airflow can be passed by the first battery pack.
  • a vent flows through at least a part of the outer peripheral surface of the battery core and flows out from the second vent.
  • the receiving portion includes a bottom surface configured to be opposite to the lower part of the housing, the bottom surface is provided with a first vent hole, and the first vent hole can be air-conducted with the first vent hole.
  • the first vent hole can be air-conducted with the first vent hole.
  • the airflow can enter the first vent through the gap, and flow through at least a part of the outer peripheral surface of the battery cell to flow out from the second vent. In this way, the airflow can enter the battery pack from the gap without being blocked by the charger.
  • the battery pack further includes a middle part of the case disposed between the upper part of the case and the lower part of the case, the middle part of the case is provided with a third vent
  • the charger further includes The fan in the charger housing, the receiving part includes a side surface opposite to the middle part of the housing, and the side surface is provided with a second ventilation hole.
  • the fan When the battery pack is contained in the receiving part, the fan generates The airflow includes: a first airflow, drawn in from the first vent and flowing to the third vent; a second airflow, drawn in from the second vent, and flowing to the third vent; the first The air flow and the second air flow merge at the third vent, and then flow out from the second vent.
  • the battery pack housing is provided with a power display part, and when the battery pack is connected to the charger, the power display part is exposed to the receiving part. This is convenient for observing the power of the battery pack during use.
  • the battery pack includes a locking part and an unlocking part
  • the locking part is used to lock the position of the battery pack and the charger
  • the unlocking part is used to unlock the position between the battery pack and the charger
  • the unlocking part is exposed outside the receiving part. This is convenient for the operator to remove the battery pack from the receiving part.
  • the present invention has the following beneficial effects: a heat dissipation channel through the battery pack is formed in the battery pack, heat dissipation is smoother, the battery core is uniformly cooled, and the heat dissipation effect of the battery pack is improved, thereby increasing the battery pack life and single pack. operating hours.
  • Fig. 1 and Fig. 2 are perspective views of a battery pack in different viewing angles in an embodiment.
  • Fig. 3 is a bottom view of the battery pack in the embodiment in Fig. 1.
  • Fig. 4 is a rear view of the battery pack in the embodiment in Fig. 1.
  • Fig. 5 is a right side view of the battery pack in the embodiment in Fig. 1.
  • Fig. 6 is an exploded view of the battery pack in an embodiment.
  • Fig. 7 is a perspective view of the first bracket of the battery pack in an embodiment.
  • Fig. 8 is a perspective view of a second bracket of the battery pack in an embodiment.
  • Fig. 9 is a cross-sectional view of the battery pack in an embodiment.
  • FIG 10 and 13 are perspective views of the main body of the electric tool in different directions in an embodiment.
  • Fig. 11 is a perspective view of a power tool system in an embodiment.
  • Figures 12 and 14 are cross-sectional views of the power tool system in an embodiment.
  • Fig. 15 is a perspective view of a charger in an embodiment.
  • Fig. 16 is a perspective view of a charging system in an embodiment.
  • 17 and 18 are cross-sectional views of the charging system in an embodiment.
  • connection should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be a connection between two components, which can be directly connected or indirectly connected through an intermediary.
  • connection should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be a connection between two components, which can be directly connected or indirectly connected through an intermediary.
  • connection should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be a connection between two components, which can be directly connected or indirectly connected through an intermediary.
  • connection can be a mechanical connection or an electrical connection, or it can be a connection between two components, which can be directly connected or indirectly connected through an intermediary.
  • an embodiment of the present invention provides a battery pack 1.
  • the battery pack 1 includes a battery pack housing 10, the battery pack 20 is arranged in the battery pack housing 10, and the battery pack 20 includes A number of electrically connected batteries 21.
  • the number of the battery cells 21 and the series-parallel connection between the battery cells 21 can be adjusted according to the voltage of the battery core 21 itself and different nominal voltages, and the present invention is not specifically limited herein.
  • the battery cell 21 may form a battery cell group by connecting pieces in series or in parallel, or a combination of series and parallel.
  • the cell 21 is a cylindrical cell, and the longitudinal direction of the cell 21 is the longitudinal direction of the cylinder.
  • the battery cell 21 can also be prismatic, which is not limited here.
  • the battery pack casing 10 includes an upper casing and a lower casing opposite to the upper casing.
  • the lower casing is provided with a first vent 121
  • the upper casing is provided with a second vent 111.
  • the longitudinal direction of the battery cell 21 is vertically arranged along the upper and lower directions of the battery pack casing 10.
  • the upper and lower directions of the battery pack casing 10 referred to here refer to the direction connecting the upper part of the casing and the lower part of the casing.
  • a heat dissipation channel Q1 connecting the first vent 121 and the second vent 111 is formed in the battery pack 1, and the airflow in the heat dissipation channel Q1 can flow through at least part of the outer peripheral surface of the cell 21. In this way, the heat dissipation channel Q1 penetrates the longitudinal direction of the battery core 21, and the cooling air directly contacts the outer peripheral surface of the battery core, ensuring that the battery core can be uniformly cooled.
  • the upper part of the housing includes a top surface 11 and the lower part of the housing includes a bottom surface 12.
  • the first vent 121 is provided on the bottom surface 12, and the second vent 111 is provided on the top surface 11.
  • each battery cell outputs a voltage of 4V, and two battery cell groups are connected in parallel to output a voltage of 48V.
  • the number of battery cell groups can also be one or more than two, which is not limited in the present invention.
  • the circulation direction of the heat dissipation channel is generally perpendicular to the longitudinal direction of the battery cell.
  • the battery cores must be overlapped in the vertical direction. The greater the number, the greater the number of overlapping layers.
  • the heat in the battery pack is transferred from bottom to top in the vertical direction, which will cause the temperature of the upper cell to be higher, which is not conducive to the heat dissipation of the cell, thereby affecting the service life of the battery pack.
  • the heat dissipation channel Q1 runs through the longitudinal direction of the cell 21, and the area of the cell 21 is larger and the cooling effect is better.
  • the circulation direction of the heat dissipation channel Q1 is basically the same as the direction of heat flow in the battery pack 1, so that the cooling air can contact each battery cell to the greatest extent, ensuring that the battery cells can be evenly cooled.
  • the battery pack casing 10 further includes a casing middle part arranged between the upper part of the casing and the lower part of the casing.
  • the middle part of the casing includes several side surfaces connecting the top surface 11 and the bottom surface 12.
  • the first side 13 and the second side 14 are oppositely arranged
  • the third side 15 and the fourth side 16 are oppositely arranged
  • the third side 15 and the fourth side 16 are along the direction in which the first side 13 and the second side 14 intersect.
  • the first side surface 13, the second side surface 14, the third side surface 15 and the fourth side surface 16 may be integrally formed, or may be provided as a single part.
  • first vent 121 includes a plurality of first vents
  • second vent 111 includes a plurality of second vents.
  • the first and second vents may be round, square or other shapes.
  • the ratio of the sum of the cross-sectional area of any one of the plurality of first air holes and the plurality of second air holes to the cross-sectional area of the battery cell group 20 is not less than 0.2.
  • the ratio of the sum of the cross-sectional areas of the first air holes to the cross-sectional area of the battery cell group 20 is not less than 0.2
  • the ratio of the sum of the cross-sectional areas of the second air holes to the cross-sectional area of the battery cell group 20 Not less than 0.2.
  • the first vents 121 of the plurality of first vents further include a first middle area connecting the plurality of first vents
  • the second vent 111 further includes a second middle area connecting the plurality of second vents.
  • the arrangement of the first vent 121 and the second vent in this way can ensure the ventilation volume of the first vent 121 and the second vent 111 and ensure the heat dissipation effect of the battery cell.
  • each battery cell group includes a bracket 22 for fixing the battery cell 21, the bracket 22 includes a number of cylinder walls, each cylinder wall forming a cavity In the receiving hole 220 of the battery core 21, the outer peripheral surface of the battery core 21 and the receiving hole 220 are coupled in a shape-matching manner.
  • the bracket 22 includes a first bracket 221 and a second bracket 222 connected to the first bracket 221, and the shape and structure of the first bracket 221 and the second bracket 222 are basically the same.
  • the first bracket 221 and the second bracket 222 respectively receive the longitudinal ends of the battery cell 21, the first bracket 221 receives the end of the battery cell 21 close to the first vent 121, and the second bracket 222 receives the battery cell 21 close to the second vent 111
  • the middle area between the two ends of the battery core 21 is not covered by the bracket 22, and the cooling air can pass through the middle area of the battery core 21 to cool at least part of the outer peripheral surface of the battery core 21.
  • the number of receiving holes 220 is greater than the number of cells 21.
  • both the first bracket 221 and the second bracket 222 are provided with a plurality of openings 223, and the openings 223 are in communication with the heat dissipation channel Q1.
  • the opening 223 is provided between adjacent cylinder walls.
  • the cooling air can pass through the openings 223 on the first bracket 221 and the second bracket 222 and the battery core 21.
  • the middle area between the ends finally flows out from the battery pack housing 10.
  • the diameters of the several openings 223 are different. The larger the number of openings and the larger the diameter of the openings in the area far from the air outlet, it can ensure that the cooling air flow in from the area far from the air outlet is larger, and the cooling air The flow path can be longer, which can cool more cells.
  • a side of the bracket 22 close to the battery core 21 is protrudingly provided with an air deflector 224, and the air deflector 224 can change the airflow direction in the heat dissipation channel Q1.
  • the wind deflector 224 includes a first rib 2241, a second rib 2242 parallel to the first rib 2241, and a third rib 2243 connecting the first rib 2241 and the second rib 2242.
  • the extension direction of the first rib 2241 is parallel to the first side surface 15, and the extension direction of the second rib 2242 is parallel to the second side surface 16.
  • the battery pack housing 10 is provided with a handle 112 for holding.
  • the handle 112 includes a first end 1120, a second end 1121, and a first end connected to the battery pack housing 10, respectively. 1120 and the grip portion 1122 of the second end portion 1121, the handle 112 has flexibility so that the distance between the grip portion 1122 and the battery pack housing 10 can be changed.
  • the handle 112 is provided on the upper part of the housing, preferably on the top surface 11.
  • the battery pack shell is provided with a handle 112 to facilitate the operator to carry the battery pack, especially the heavy-weight and large-capacity battery pack.
  • the handle 112 is flexible so that the distance between the holding portion 1122 and the battery pack housing 10 can be changed.
  • the holding portion 1122 can be elastically deformed and can expand and contract within a certain range.
  • the handle 112 has flexible elasticity so that when the operator holds the handle 112, the amount of deformation of the holding portion 1122 in the vertical direction is not less than 3 mm. In this way, the handle can be accommodated in a small space, miniaturization of the battery pack is realized, and the elastic deformation of the grip portion can prevent the handle 112 from falling off and failing.
  • the handle 112 can be made of rubber, and can also be made of elastic metal or plastic parts.
  • the first end portion 1120, the second end portion 1121, and the holding portion 1122 may be integrally formed, or may be separated and then connected to each other.
  • the surface of the battery pack housing 10 where the handle 112 is provided is provided with a concave surface 114 and an edge surface 113 surrounding the concave surface 114.
  • the concave surface 114 is opposite to the edge surface 113 and is away from the holding portion 1122, and holds The projection of the portion 1122 on the concave surface 114 at least partially overlaps with the concave surface 114.
  • the concave surface 114 and the edge surface 113 are disposed on the top surface 11
  • the second vent 111 is located on the concave surface 114
  • the first end portion 1120 and the second end portion 1121 are disposed on the edge surface 113. Further, as shown in FIG.
  • the distance H between the holding portion 1122 and the concave surface 114 is between 14-17 mm, that is, the distance H between the lowest point of the holding portion 1122 and the concave surface 114 is between 14-17 mm .
  • the battery pack 1 includes a locking portion 43 and an unlocking portion 40.
  • the locking portion 43 is used to lock the position of the battery pack 1 and an external device, and the unlocking portion 40 is used to release the battery pack 1 from the external device. Position lock between devices.
  • the unlocking portion 40 is provided in a button shape, and the locking portion 43 is provided in a buckle shape.
  • the locking portion 43 of the unlocking portion 40 can also be provided in other shapes.
  • the unlocking portion 40 can be integrally formed with the locking portion 43, or can be provided separately.
  • an external device refers to an electric tool powered by the battery pack 1 and/or a charger for charging the battery pack. Further, as shown in FIG.
  • the unlocking portion 40 is located on one side of the handle 112, the unlocking portion 40 is disposed close to the handle 112, and the minimum distance S between the unlocking portion 40 and the handle 112 in the horizontal direction is not greater than 85 mm. In other words, the distance between the unlocking portion 40 and the handle 112 in the horizontal direction from the closest point is not more than 85 mm. Optionally, the minimum distance S in the horizontal direction between the unlocking portion 40 and the handle 112 is 45 mm. In this way, the operator can simultaneously press the unlocking portion 40 and the holding handle 112 with one hand, and simultaneously unlock and remove the battery pack from the external device, which is convenient and quick to operate.
  • the battery pack further includes an adapting part for connecting with an external device along the sliding direction M.
  • the sliding direction M is the longitudinal direction of the battery core, which is substantially parallel to the flow direction of the heat dissipation channel Q1.
  • the adapting part 30 is disposed on the side of the battery pack housing 10, and the side may be a certain side of the battery pack housing 10, or it may be a whole or a partial combination of certain sides.
  • the side portion of the battery pack housing 10 includes a first side surface 13 and a part of the third side surface 15 and the fourth side surface 16 projected onto the first side surface 13.
  • the adapting part 30 includes a first end 300 close to the top surface, a second end 301 opposite to the first end 300, and two opposite side walls 302 and 303 connected to the first end 300 and the second end 301.
  • the two side walls A pair of sliding rails or sliding grooves 304 extending in parallel along the sliding direction M are respectively provided between 302 and 303.
  • the distance between a pair of sliding rails or sliding grooves is defined as the first width W1, the outermost boundary of the side has a second width perpendicular to the sliding direction M, please refer to Figure 3, the second width W2 refers to the first side 13
  • the ratio of the first width W1 to the second width W2 is between 0.47-0.52.
  • the ratio of the first width W1 to the second width W2 is 0.47;
  • the ratio of the first width W1 to the second width W2 is 0.49;
  • the first width W1 is 71mm and the second width W2 is 137mm, the first width W1
  • the ratio to the second width W2 is 0.52.
  • the length of the sliding rail or sliding groove 304 is defined as the first height H1, and the outermost boundary of the side has a second height H2 parallel to the sliding direction M.
  • the second height H2 refers to the first height H1.
  • the ratio of the first height H1 to the second height H2 is between 0.48-0.5.
  • the difference between the first height H1 and the second height H2 The ratio is 0.48; when the first height H1 is 81mm and the second height H2 is 166mm, the ratio of the first height H1 to the second height H2 is 0.49; when the first height H1 is 83mm and the second height H2 is 166mm, The ratio of the first height H1 to the second height H2 is 0.5.
  • This arrangement can not only ensure the compact structure of the battery pack, but also ensure that the battery pack is firmly connected to the external device.
  • the adapting portion 30 further includes a terminal receiving portion located at the second end 301, the terminal receiving portion includes a first terminal groove 305, a second terminal groove 306, a third terminal groove 307, and a fourth terminal groove 305 extending in parallel along the longitudinal direction of the cell.
  • the terminal groove 308 and the fifth terminal groove 309 are housed in the first terminal groove 305 for the positive terminal for electrical connection with the external device, and housed in the second terminal groove 306 for the negative terminal for electrical connection with the external device,
  • the communication terminals are respectively received in the third terminal groove 307, the fourth terminal groove 308, and the fifth terminal groove 309 for electrical connection with external devices.
  • the communication terminals are used to transmit various data of the battery pack 1.
  • the number of terminal slots for accommodating the communication terminals is not limited to 3, and can be 2, 4, 5, etc.
  • the first terminal groove 305 and the second terminal groove 306 are provided at both ends of the terminal receiving portion, and are located between a pair of sliding rails or sliding grooves 304.
  • the third terminal groove 307, the fourth terminal groove 308 and the fifth terminal groove are provided between the first terminal groove 305 and the second terminal groove 306.
  • the first width W1 is 67.5mm
  • the first height H1 is 81mm
  • the second width W2 is 137mm
  • the second height H2 is 166mm
  • the height D of the sliding rail or the sliding groove 304 is 5.3mm
  • the center distance W3 between the 305 and the second terminal groove 306 is 37-42 mm. This arrangement can make the connection between the battery pack 1 and the external device more stable and reliable.
  • the unlocking portion 40 is provided on the second side surface 14, and the adapting portion 30 and the unlocking portion 40 are provided on opposite sides of the battery pack housing 10, so that it is convenient for the operator to unlock the battery pack or insert the battery pack. When, the force of the battery pack is more balanced.
  • the adapting portion 30 does not exceed the outermost boundary of the side portion. That is, the adapting part 30 is located in the frame defined by the outermost boundary of the side part. As shown in FIG. 5, the adapting part 30 does not extend beyond the outermost boundary of the first side 13 and the third side 15 and the fourth side 16 projected to the first side 13.
  • the battery pack 1 further includes a power display unit 41 that displays the power of the battery pack 1.
  • the power display unit 41 includes a power display button and a number of power display lamps.
  • the power display unit 41 and the battery pack housing 10 There is also a circuit board 42 that controls the battery pack 1 to display power.
  • the power display button When the power display button is pressed, the operator can determine the power of the battery pack 1 according to the number of power display lights.
  • there are six power indicator lights of course, there may be two, three, or others, and the power indicator lights are LED lights.
  • the power display portion 41 and the adapting portion 30 are located on the same side of the battery pack 1, that is, the power display portion 41 and the adapting portion 30 may be located on the same surface of the battery pack 1, or as shown in FIGS. 2 and 6 It is shown that the power display portion 41 and the adapting portion 30 are not located on the same surface, but the projections of the two in the side view direction are located on the same surface but do not overlap.
  • the circuit board (not shown) of the battery pack will be in close proximity to the adapting part, and the circuit board 42 responsible for power display will be close to the power display part 41, and the power display part 41 and the adapting part 30 are located in the battery pack 1.
  • the circuit board of the battery pack and the circuit board 42 can be located on the same side, which facilitates wiring layout and saves space and cost.
  • a portion of the second side surface 14 close to the top surface 11 is provided with a first slope surface 141 inclined to the handle 112, the unlocking portion 40 is provided on the first slope surface 141, and the first side surface 13 is provided with a first slope surface 141.
  • the power display unit 41 is arranged on the second slope 131.
  • the first slope surface 141 and the second slope surface 131 correspond to that they are substantially at the same height in the vertical direction, and the first slope surface 141 and the second slope surface 131 are both sides of the corresponding side near the top surface 11. A slope formed by slanting toward the handle 112.
  • a protective cover 1310 is provided on the second slope surface 131, and the protective cover 1310 is used to cover at least part of the power display portion 41 to prevent water from entering the power display portion when it is raining.
  • a third vent 140 is provided in the middle of the housing.
  • the third vent 140 is provided on the second side surface 14, by adding the battery pack housing 10
  • the third vent 140 can increase the ventilation volume of the cooling air and obtain a better cooling effect of the battery pack 1.
  • the third vent 140 at least partially overlaps the projection of the battery core 21 close to the bottom surface 12 in the vertical direction. In this way, the cooling air enters the battery pack from the third vent 140, which can cool the bottom cell close to the bottom surface 12 first, and then cool the top cell close to the top surface 11, which has a cooling effect for each cell, thus Achieve uniform cooling of the cells.
  • the battery pack 1 can slide along the sliding direction M to realize connection and detachment with an external device.
  • the positive terminal, negative terminal, and communication terminal in the battery pack 1 are disconnected from the corresponding mating terminals on the external device.
  • the adapter 30 is disconnected from the external device, and the battery pack 1 is detached from the external device; when the battery pack 1 slides from top to bottom relative to the external device along the sliding direction, the positive and negative terminals in the battery pack 1
  • the communication terminal is connected with the corresponding mating terminal on the external device, so that the adapting part 30 is connected with the external device, and the battery pack 1 is connected with the external device.
  • the sliding direction M is basically parallel to the circulation direction of the heat dissipation channel Q1, which can ensure that after the battery pack 1 is connected to an external device, the arrangement direction of the cells is basically parallel to the circulation direction of the heat dissipation channel Q1, so as to ensure that the cells 21 can be cooled to the maximum. Scope cooling.
  • the present invention also provides a power tool system, including a power tool main body 5, and a battery pack 1 detachably connected to the power tool main body 5, the battery pack 1 is the battery as described above Package 1, not repeat it here.
  • the battery pack 1 is connected to the power tool main body 5, the air flow can flow from the first vent 121 through at least a part of the outer peripheral surface of the battery cell 21 and flow out from the second vent 111.
  • Figures 10-14 illustrate the case where the power tool body 5 is a chain saw, but the power tool body 5 can also be other power tools, such as angle grinders, lawn mowers, electric hammers, pruning shears, etc. Do restrictions.
  • the power tool body 5 includes a tool housing 50, a motor (not shown) housed in the tool housing 50, and an output part (not shown) driven by the motor.
  • the tool housing 50 includes a tool housing 50 for accommodating at least part of the battery pack 1.
  • the receiving portion 51 includes a bottom surface 510 disposed opposite to the lower part of the housing.
  • the bottom surface 510 is provided with a first vent hole 511, and the first vent hole 511 can communicate with the first vent 121 in air flow.
  • the cooling air enters the battery pack 1 from the first vent 511, that is, the cooling air enters the first vent 121 through the first vent 511 and flows along the heat dissipation channel Q1. It flows out from the second vent 111.
  • the cooling air in the vertical direction will not be blocked by the power tool main body 5, and an effective heat dissipation channel can be formed from bottom to top, and the cooling air enters the battery pack 1 at the shortest distance for cooling, without losing air volume, and cooling the battery 21 better result.
  • the receiving portion 51 includes a side surface 512 opposite to the middle of the casing, and a gap (not shown) for cooling air to flow is provided between the side 512 and the middle of the casing.
  • the side surface 512 is opposite to the second side surface 14, and there is a gap for the cooling air to flow between the side surface 512 and the second side surface 14.
  • a gap is provided between the side surface 512 and the second side surface 14, but also other side surfaces in the middle of the housing and the surface corresponding to the receiving portion 51 can be provided with a gap. It can also be provided between the bottom surface 510 of the receiving portion 51 and the bottom surface of the battery pack 1. Set a gap between 12. In this way, the cooling air can respectively enter the third vent 140 and the first vent 121 from the gap, and then enter the battery pack 1, and flow out from the second vent 111 along the circulation direction of the heat dissipation channel Q1. By providing a gap between the receiving part 51 and the battery pack 1, the air intake of the cooling air can be increased, and the effect of cooling the battery cell 21 is better.
  • the side surface 512 includes a second ventilation hole 521
  • the power tool body 5 further includes a fan 53 arranged in the tool housing 50.
  • the airflow generated by the fan 53 includes: a first airflow Q2, drawn in from the first vent 121, flowing to the third vent 140; a second airflow Q3, drawn in from the second vent 111, flowing to the third vent 140, the first The air flow Q2 and the second air flow Q3 merge at the third vent 140 and then flow out from the second vent 521.
  • the first airflow Q2 is sucked in from the first vent 121, passes through the opening 223 of the first bracket 221, is guided by the wind deflector 224, passes through the battery core 21, and flows to the third vent 140
  • the power display portion 41 is exposed from the receiving portion 51, so that it is convenient to observe the remaining power of the battery pack 1 during use.
  • the unlocking portion 40 is exposed from the receiving portion 51, so that the operator can easily remove the battery pack 1 from the receiving portion 51.
  • the present invention also provides a charging system.
  • the charging system includes a charger 6 and a battery pack 1 detachably connected to the charger 6.
  • the charging circuit (not shown) in the battery case 60, the battery pack 1 is the battery pack 1 described above, and will not be repeated here.
  • the air flow can flow from the first vent 121 through at least a part of the outer peripheral surface of the cell 21 and flow out from the second vent 111.
  • the charging system is similar to the aforementioned power tool system, and the cooling process of the charging system will be introduced one by one below.
  • the charger housing 60 also includes a receiving portion 61 for accommodating at least part of the battery pack.
  • the receiving portion 61 includes a bottom surface 610 disposed opposite to the lower part of the housing.
  • the bottom surface 610 is provided with a first vent hole (not shown). It is in air flow communication with the first vent 121.
  • the cooling air enters the battery pack 1 from the first vent hole, that is, the cooling air enters the first vent hole 121 through the first vent hole, and flows along the heat dissipation channel Q1 from the second vent hole.
  • the vent 111 flows out.
  • the cooling air in the vertical direction will not be blocked by the charger 6, and an effective heat dissipation channel can be formed from bottom to top, and the cooling air enters the battery pack 1 at the shortest distance for cooling, without losing air volume, and has a cooling effect on the battery cell 21 better.
  • the receiving portion 61 includes a side surface 62 opposite to the middle of the casing, and a gap (not shown) for cooling air to flow is provided between the side 62 and the middle of the casing.
  • the side surface 62 and the second side surface 14 are disposed opposite to each other, and there is a gap for the cooling air to flow between the side surface 62 and the second side surface 14.
  • not only a gap is provided between the side surface 62 and the second side surface 14, but also other side surfaces in the middle of the housing and the surface corresponding to the receiving portion 51 can be provided with gaps.
  • the cooling air can respectively enter the third vent 140 and the first vent 121 from the gap, and then enter the battery pack 1, and flow out from the second vent 111 along the circulation direction of the heat dissipation channel Q1.
  • the amount of cooling air can be increased, and the effect of cooling the battery cell 21 is better.
  • the side surface 62 includes a second ventilation hole 621
  • the charger 6 further includes a fan 63 arranged in the charger housing 60.
  • the airflow generated by the fan 63 includes: a first airflow Q4, which is drawn in from the first vent 121, and flows to the third vent 140; a second airflow Q5, which is drawn from the second vent 111, and flows to the third vent 140, the first airflow Q4 and the second airflow Q5 merge at the third vent 140 and then flow out from the second vent 521.
  • the first airflow Q4 is sucked in from the first vent 121, passes through the opening 223 of the first bracket 221, is guided by the wind deflector 224, passes through the cell 21, and flows to the third vent 140 ;
  • the power display portion 41 is exposed to the receiving portion 61, so that it is convenient to observe the remaining power of the battery pack 1 during use.
  • the unlocking part 40 is used to unlock the battery pack 1 and the charger 6, and the unlocking part 40 is exposed from the receiving part 61, which facilitates the operator to separate the battery pack 1 from the receiving part 61.

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Abstract

一种电池包（1）以及包括该电池包（1）的电动工具系统和充电系统，该电池包（1）包括：电池包壳体（10）；设置在电池包壳体（10）中的电芯组（20），电芯组（20）包括若干电性连接的电芯（21）；电池包壳体（10）包括壳体上部，以及与壳体上部相对设置的壳体下部，壳体下部设有第一通风口（121），壳体上部设置有第二通风口（111），电芯（21）的纵向沿电池包壳体（10）的上、下方向竖直布置，电池包（1）内形成连通第一通风口（121）和第二通风口（111）的散热通道（Q1），电芯（21）的至少部分外周表面处于散热通道（Q1）内。这样可以使电芯（21）均匀冷却，提高电池包（1）的散热效果，从而提高电池包（1）寿命与单包工作时间。

Description

电池包及包括电池包的电动工具系统和充电系统
本申请要求了申请日为2019年12月13日，申请号为201911289702.5的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及一种电池包及包括电池包的电动工具系统和充电系统。
背景技术
电池包在工作时，电芯会产生热量，随着温度升高，会降低电芯的放电性能及寿命。温度越高，对电池包的性能影响越恶劣。因此，电池包如何快速散热成为亟待解决的难题。
现有技术中，电芯的纵长轴线方向垂直于竖直方向，特别是大容量电池包，电芯节数很多，导致电芯在竖直方向会存在重叠布置。而且电芯节数越多，重叠越多。而在自然状态下，电芯产生的热量会由下而上传递。当采用如上布置时，会导致在竖直方向上，越往上电芯的温度越高，从而使得电池工作情况越恶劣，影响电池的寿命。
发明内容
为克服现有技术的缺陷，本发明所要解决的问题是提供一种散热效果好的电池包及包括电池包的电动工具系统和充电系统。
本发明提供一种电池包，包括：电池包壳体；电芯组，设置在所述电池包壳体中，所述电芯组包括若干电性连接的电芯；所述电池包壳体包括壳体上部，以及与壳体上部相对设置的壳体下部，所述壳体下部设有第一通风口，所述壳体上部设置有第二通风口，所述电芯的纵向沿所述电池包壳体的上、下方向竖直布置，所述电池包内形成连通所述第一通风口和第二通风口的散热通道，所述电芯的至少部分外周表面处于所述散热通道内。这样散热通道贯穿电芯的纵长方向，冷却电芯的面积更大，冷却效果更好。
可选地，所述电芯组具有若干个，若干个电芯组以所述电芯的纵向叠合设置。电芯组这样排布，冷却空气可以最大限度地接触到每节电芯，保证电芯能够被均匀冷却。
可选地，所述第一通风口包括若干第一风孔，所述第二通风口包括若干 风孔，所述若干第一风孔及若干第二风孔中任一横截面积的总和与所述电芯组的横截面积的比值均不小于0.2。这样设置可以保证第一通风口和第二通风口的通风量，保证电池包的散热效果。
可选地，所述电池包还包括设置在所述壳体上部和壳体下部之间的壳体中部，所述壳体中部设置有第三通风口。通过在电池包上增加了第三通风口，可以增加冷却空气的通风量，以获得更好的冷却电池包的效果。
可选地，所述电芯组包括用于固定电芯的支架，所述支架设置有若干开口，所述开口与所述散热通道连通。在支架开设与散热通道连通的开口，可以使冷却空气直接接触电芯表面，冷却效果更佳。
可选地，所述支架靠近电芯的一侧凸设有导风板，所述导风板能够改变所述散热通道内的气流流向，使冷却空气可以朝着温度更高的电芯的方向流动，实现电芯均匀冷却。
可选地，所述电池包壳体设有可供握持的把手，所述把手包括分别与电池包壳体连接的第一端部和第二端部，以及连接所述第一端部与第二端部的握持部，所述把手具有柔弹性以使所述握持部相对电池包壳体之间的距离可变化。这样可以极大提高电池包的便携性，提高把手的可靠性，还可以实现在较小空间内收容操作者的手部，使电池包的整体尺寸较小。
可选地，所述把手采用橡胶材质。
可选地，所述电池包还包括用于与外部设备连接的适配部，以及解除所述电池包与外部设备位置锁定的解锁部。
可选地，所述解锁部位于所述把手的一侧，所述解锁部与所述把手在水平方向的最小间距不大于85mm。
可选地，所述电池包还包括用以显示电池包电量的电量显示部，所述电量显示部与所述适配部位于所述电池包的同一侧。
可选地，所述适配部与所述解锁部位于所述电池包的相对侧。
可选地，设置所述把手的电池包壳体的表面设置有凹入面以及包围所述凹入面的边缘面，所述凹入面相对所述边缘面远离所述握持部，所述握持部在所述凹入面上的投影至少部分与凹入面重合。
可选地，所述第一端部和第二端部分别设置在边缘面上。
可选地，所述握持部与所述凹入面的间距在14-17mm之间。
可选地，所述电池包沿着所述电芯的纵向与外部设备可拆卸地滑动配接。
可选地，电池包包括用于沿滑动方向与外部设备连接的适配部，所述适配部设置在所述电池包壳体的侧部，所述适配部包括一对沿所述滑动方向平行延伸的滑轨或滑槽，一对滑轨或滑槽的间距定义成第一宽度，所述侧部的最外边界具有垂直于所述滑动方向的第二宽度，所述第一宽度与第二宽度的比值在0.47-0.52之间。这样设置既能保证电池包结构紧凑，又能保证电池包在电动工具或者充电器上连接稳固。
可选地，所述第二宽度的范围在64-71mm之间。这样设置既能保证电池包结构紧凑，又能保证电池包在外部设备上连接稳固。
可选地，所述滑轨或滑槽的长度定义成第一高度，所述侧部的最外边界具有平行于所述滑动方向的第二高度，所述第一高度与第二高度的比值在0.48-0.5之间。这样设置既能保证电池包结构紧凑，又能保证电池包在外部设备上连接稳固。
可选地，所述适配部还包括沿电芯纵向平行延伸的第一端子槽和第二端子槽，收容于所述第一端子槽内用于与所述外部设备电连接的正极端子，以及收容于所述第二端子槽内用于与所述外部设备电连接的负极端子。这样设置可以使电池包与外部设备之间的连接更加稳固可靠。
可选地，所述第一端子槽和第二端子槽位于一对滑轨或滑槽之间，所述第一端子槽与第二端子槽之间的中心距离在37-42mm之间。这样设置可以保证实现电池包与外部设备电连接的空间。
可选地，所述电池包还包括解除电池包与外部设备的位置锁定的解锁部，所述解锁部设置于与所述适配部相对的电池包另一侧。这样设置方便操作者在解锁电池包或者插接电池包时，电池包的受力比较均衡。
可选地，所述电池包设置有把手，所述解锁部靠近所述把手设置，以使握持把手的手能同时操作所述解锁部。这样操作者可以一只手同时完成握持电池包和解锁两个动作，解锁的同时将电池包移除出外部设备。
可选地，所述把手具有具有柔弹性，以使握持所述把手时把手相对电池包壳体的距离可变化。这样握持不仅舒适，还可以节约电池包的整体高度。
可选地，所述电池包还包括用于显示电池包电量的电量显示部，所述电量显示部与所述适配部设置于所述电池包的同一侧。这样方便电池包内部的电路板布线，节约空间与成本。
可选地，所述适配部不超出所述侧部的最外边界。这样使得电池包的外 形方正且尺寸小巧。
本发明还提供一种电动工具系统，包括电动工具主体，所述电动工具主体包括工具壳体、收容于工具壳体内的马达、以及由马达驱动的输出部，所述电动工具系统还包括如上所述的电池包，所述工具壳体包括用于容纳至少部分所述电池包的接收部，所述电池包与所述电动工具主体可拆卸地连接，电池包为所述马达提供动力，当所述电池包配接于所述电动工具主体时，气流能够由所述第一通风口流经所述电芯的至少部分外周表面从第二通风口流出。当电池包与电动工具主体配接时，气流不会被遮挡，仍然可以沿着散热通道进入电池包，冷却电芯。可选地，所述接收部包括用于与所述壳体下部相对设置的底面，所述底面设置有第一通风孔，所述第一通风孔能够与所述第一通风口气流导通。这样在竖直方向上不会被电动工具主体遮挡，可以自下而上形成有效的散热通道，冷却空气以最短距离进入电池包冷却，没有流失风量，对电芯的冷却效果更好。
可选地，所述接收部与所述电池包之间有间隙，气流能够由所述间隙进入第一通风口，流经所述电芯的至少部分外周表面从第二通风口流出。这样气流可以从间隙进入电池包内，不会被电动工具主体遮挡。
可选地，所述电池包还包括设置在所述壳体上部和壳体下部之间的壳体中部，所述壳体中部设置有第三通风口，所述电动工具壳体还包括设置于所述工具壳体内的风扇，所述接收部包括与所述壳体中部相对设置的侧面，所述侧面设置有第二通风孔，当所述电池包收容于所述接收部时，所述风扇产生的气流包括：第一气流，从所述第一通风口吸入，流向所述第三通风口；第二气流，从所述第二通风口吸入，流向所述第三通风口；所述第一气流与第二气流于所述第三通风口处合流，再从所述第二通风孔流出。通过在电动工具主体内设置风扇，可以形成额外的第一气流与第二气流对电池包进行冷却，冷却效果更好。
可选地，所述电池包壳体设置有用于显示所述电池包电量的电量显示部，当电池包配接于所述电动工具主体时，所述电量显示部外露于所述接收部。这样便于在使用时观察电池包的电量。
可选地，所述电池包还包括锁定部以及解锁部，所述锁定部用于将电池包与电动工具主体的位置锁定，所述解锁部用于解除所述电池包与电动工具主体之间的位置锁定，所述解锁部外露于所述接收部。这样便于操作者将电 池包脱离接收部。
本发明还提供一种充电系统，包括充电器，所述充电器包括充电器壳体、设置于所述充电器壳体内的充电电路，所述充电系统还包括如上所述的电池包，所述充电器壳体包括用于收容至少部分电池包的接收部，所述电池包与所述充电器可拆卸地连接，当所述电池包配接于所述充电器时，气流能够由所述第一通风口流经所述电芯的至少部分外周表面从第二通风口流出。
可选地，所述接收部包括用于与所述壳体下部相对设置的底面，所述底面设置有第一通风孔，所述第一通风孔能够与所述第一通风口气流导通。这样在竖直方向上不会被充电器遮挡，可以自下而上形成有效的散热通道，冷却空气以最短距离进入电池包冷却，没有流失风量，对电芯的冷却效果更好。
可选地，所述接收部与所述电池包之间有间隙，气流能够由所述间隙进入第一通风口，流经所述电芯的至少部分外周表面从第二通风口流出。这样气流可以从间隙进入电池包内，不会被充电器遮挡。
可选地，所述电池包还包括设置在所述壳体上部和壳体下部之间的壳体中部，所述壳体中部设置有第三通风口，所述充电器还包括设置于所述充电器壳体内的风扇，所述接收部包括与所述壳体中部相对设置的侧面，所述侧面设置有第二通风孔，当所述电池包收容于所述接收部时，所述风扇产生的气流包括：第一气流，从所述第一通风口吸入，流向所述第三通风口；第二气流，从所述第二通风口吸入，流向所述第三通风口；所述第一气流与第二气流于所述第三通风口处合流，再从所述第二通风孔流出。通过在充电器内设置风扇，可以形成额外的第一气流与第二气流对电池包进行冷却，冷却效果更好。
可选地，所述电池包壳体设置有电量显示部，当电池包配接于所述充电器时，所述电量显示部外露于所述接收部。这样便于在使用时观察电池包的电量。
可选地，所述电池包包括锁定部以及解锁部，所述锁定部用于将电池包与充电器的位置锁定，所述解锁部用于解除所述电池包与充电器之间的位置锁定，所述所述解锁部外露于所述接收部。这样便于操作者将电池包脱离接收部。
与现有技术相比，本发明的有益效果是：电池包内形成贯通电芯的散热通道，热量散发更顺畅，电芯均匀冷却，提高电池包的散热效果，从而提高 电池包寿命与单包工作时间。
附图说明
以上所述的本发明的目的、技术方案以及有益效果可以通过下面附图实现：
图1和图2是一实施例中电池包不同视角的立体图。
图3是图1中一实施例中电池包的仰视图。
图4是图1中一实施例中电池包的后视图。
图5是图1中一实施例中电池包的右视图。
图6是一实施例中电池包的爆炸图。
图7是一实施例中电池包第一支架的立体图。
图8是一实施例中电池包第二支架的立体图。
图9是一实施例中电池包的剖视图。
图10和图13是一实施例中电动工具主体不同方向的立体图。
图11是一实施例中电动工具系统的立体图。
图12和图14是一实施例中电动工具系统的剖视图。
图15是一实施例中充电器的立体图。
图16是一实施例中充电系统的立体图。
图17和图18是一实施例中充电系统的剖视图。
具体实施方式
结合附图和本发明具体实施方式的描述，能够更加清楚地了解本发明的细节。但是，在此描述的本发明的具体实施方式，仅用于解释本发明的目的，而不能以任何方式理解成是对本发明的限制。在本发明的教导下，技术人员可以构想基于本发明的任意可能的变形，这些都应被视为属于本发明的范围。需要说明的是，当元件被称为“设置于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。术语“安装”、“相连”、“连接”应做广义理解，例如，可以是机械连接或电连接，也可以是两个元件内部的连通，可以是直接相连，也可以通过中间媒介间接相连，对于本领域的普通技术人员而言，可以根据具体情况理解上述术语的具体含义。本文所使用的术语“垂直的”、“水平的”、“上”、“下”、“左”、“右”以及类似的表述只是为了说明的目的，并不表示是唯一的实施方式。
如图1到图9所示，本发明的一实施例提供一种电池包1，电池包1包括电池包壳体10，电芯组20设置在电池包壳体10中，电芯组20包括若干电性连接的电芯21。
电芯21的个数以及电芯21之间的串并联方式可以根据该电芯21本身的电压以及不同的标称电压进行调整，本发明在此并不作具体的限定。具体的，该电芯21可以通过连接片串联或者并联，或者串联和并联相结合的方式形成电芯组。在一实施例中，电芯21为圆柱状电芯，电芯21的纵向为圆柱的纵长方向。当然，电芯21也可以为棱柱状，在此不做限制。
在一实施例中，该电池包壳体10包括壳体上部，以及与壳体上部相对设置的壳体下部，壳体下部设有第一通风口121，壳体上部设有第二通风口111，电芯21的纵向沿电池包壳体10的上、下方向竖直布置，这里说的电池包壳体10的上、下方向指的是连通壳体上部和壳体下部的方向。电池包1内形成连通第一通风口121和第二通风口111的散热通道Q1，散热通道Q1内的气流能够流经电芯21的至少部分外周表面。这样散热通道Q1贯穿电芯21的纵长方向，冷却空气直接接触电芯的外周表面，保证电芯能够被均匀冷却。
在一实施例中，壳体上部包括顶面11，壳体下部包括底面12，可选地，第一通风口121设置在底面12上，第二通风口111设置在顶面11上。当电芯温度升高时，电池包1内形成自下而上流通的散热通道Q1，电芯21的纵长方向大致平行于散热通道Q1的流通方向。
在一实施例中，请参阅图6，电芯组20具有若干个，若干个电芯组20沿电芯21的纵向叠合设置。可选地，电芯组20具有2个，其中一个电芯组有12节电芯，另一个电芯组有12节电芯。进一步的，每节电芯输出4V电压，两个电芯组并联，输出48V电压。当然，电芯组的个数也可以为一个或者两个以上，本发明对此不做限制。
在现有技术中，散热通道的流通方向一般垂直于电芯的纵长方向，而大容量电池包中电芯的数量众多，那么电芯在竖直方向上必然会存在重叠布置，且电芯数量越多，重叠的层数越多。在自然状态下，电池包内的热量在竖直方向上自下而上传递，这样会导致在上层的电芯的温度越高，不利于电芯的散热，从而影响电池包的使用寿命。而在本发明中，散热通道Q1贯穿电芯21的纵长方向，冷却电芯21的面积更大，冷却效果更好。且散热通道Q1的流通方向与电池包1内热量流动的方向基本相同，这样冷却空气可以最大限 度地接触每节电芯，保证电芯能够被均匀冷却。
在一实施例中，电池包壳体10还包括设置在壳体上部和壳体下部之间的壳体中部，壳体中部包括连接顶面11与底面12的若干个侧面，若干个侧面包括第一侧面13、第二侧面14、第三侧面15和第四侧面16。其中，第一侧面13和第二侧面14相对设置，第三侧面15和第四侧面16相对设置，且第三侧面15和第四侧面16沿着第一侧面13和第二侧面14交叉的方向延伸。其中，第一侧面13、第二侧面14、第三侧面15和第四侧面16可以一体成型，也可以设置成单个零件。
进一步地，第一通风口121包括若干第一风孔，第二通风口111包括若干第二风孔，第一风孔和第二风孔可以为圆形、方形或其他形状。若干第一风孔及若干第二风孔中任一横截面积的总和与电芯组20的横截面积的比值不小于0.2。也就是说，若干第一风孔横截面积的总和与电芯组20的横截面积的比值不小于0.2，若干第二风孔横截面积的总和与电芯组20的横截面积的比值不小于0.2。可选地，若干第一风孔的第一通风口121还包括连接若干第一风孔的第一中间区域，第二通风口111还包括连接若干第二风孔的第二中间区域。第一通风口121和第二通风口这样设置可以保证第一通风口121和第二通风口111的通风量，保证电芯的散热效果。
请参阅图6、图7、图8，在一实施例中，每个电芯组都包括用于固定电芯21的支架22，支架22包括若干筒壁，每个筒壁的内腔形成接收电芯21的收容孔220，电芯21的外周面与收容孔220形状匹配地耦合。可选地，支架22包括第一支架221和与第一支架221连接的第二支架222，第一支架221与第二支架222的形状结构基本相同。第一支架221和第二支架222分别接收电芯21纵向的两端，第一支架221接收电芯21靠近第一通风口121的一端，第二支架222接收电芯21靠近第二通风口111的一端，电芯21两端之间的中间区域没有被支架22所遮盖，冷却空气能够从电芯21的中间区域穿过，冷却电芯21的至少部分外周表面。
在一实施例中，收容孔220的数量大于电芯21的数量。可选地，每个电芯组中的电芯21为12节，收容孔220的数目为20个。这样，冷却空气可以从未收容电芯的收容孔进入，进而冷却电芯。
在一实施例中，第一支架221和第二支架222上都设有若干开口223，开口223与散热通道Q1连通。可选地，开口223设置在相邻筒壁之间，当冷 却空气从电池包壳体10进入时，冷却空气可以穿过第一支架221和第二支架222上的开口223以及电芯21两端之间的中间区域，最后再从电池包壳体10流出。可选地，若干开口223的直径各不相同，远离出风口的区域设置的开口数量越多且开口的直径越大，这样可以保证从远离出风口的区域流入的冷却空气流量更大，冷却空气流动的路径可以更长，也就可以冷却更多电芯。
在一实施例中，支架22靠近电芯21的一侧凸设有导风板224，导风板224能够改变散热通道Q1内的气流流向。可选地，导风板224包括第一筋板2241、平行于第一筋板2241的第二筋板2242以及连接第一筋板2241与第二筋板2242的第三筋板2243。具体地，第一筋板2241的延伸方向平行于第一侧面15，第二筋板2242的延伸方向平行于第二侧面16。当冷却空气从支架22上的开口223进入，冷却空气可以沿着导风板224的轮廓改变流向，冷却相应的电芯后再流出壳体外，实现电芯的均匀冷却。
在一实施例中，电池包壳体10设有可供握持的把手112，把手112包括分别与电池包壳体10连接的第一端部1120、第二端部1121以及连接第一端部1120和第二端部1121的握持部1122，把手112具有柔弹性以使握持部1122相对电池包壳体10之间的距离可变化。可选地，把手112设置在壳体上部上，优选设置在顶面11上。电池包壳体设置把手112可以方便操作者携带电池包，特别是重量较重的大容量电池包。把手112具有柔弹性以使握持部1122相对电池包壳体10之间的距离可变化的意思是说握持部1122可以弹性变形，能够在一定范围内伸缩，当操作者握持把手时，由于受力的作用，握持部相对电池包壳体之间的距离能够通过弹性变形实现变化。一般来说，把手112具有柔弹性会使得当操作者握持把手112时，握持部1122在竖直方向上的变形量不小于3mm。这样能够在较小的空间内容纳把手，实现电池包的小型化，且握持部的弹性变形能够防止把手112跌断失效。把手112可以采用橡胶材质，也可以采用具有弹性的金属件或塑料件。第一端部1120、第二端部1121以及握持部1122可以一体成型，也可以分体然后相互连接而成。
在一实施例中，设置把手112的电池包壳体10的表面设置有凹入面114以及包围凹入面114的边缘面113，凹入面114相对边缘面113远离握持部1122，握持部1122在凹入面114上的投影至少部分与凹入面114重合。可选地，凹入面114以及边缘面113设置在顶面11上，第二通风口111位于凹入面114上，第一端部1120和第二端部1121设置在边缘面113上。进一步地， 如图9所示，握持部1122与凹入面114的间距H为14-17mm之间，即握持部1122的最低点与凹入面114的间距H为14-17mm之间。这样，即使握持部1122凸出于壳体上部的高度较小，也可以获得较大的操作者手部容纳空间，既可以实现电池包的整体尺寸较小，也能够满足握持电池包的需求。
在一实施例中，请参阅图1，电池包1包括锁定部43以及解锁部40，锁定部43用于将电池包1与外部设备的位置锁定，解锁部40用于解除电池包1与外部设备之间的位置锁定。可选地，解锁部40设置成按钮状，锁定部43设置成卡扣状，当然，解锁部40锁定部43也可以设置成其他形状。解锁部40可以与锁定部43一体成型，也可以分开设置。在本申请中，外部设备指的是由电池包1供电的电动工具和/或给电池包充电的充电器。进一步地，如图9所示，解锁部40位于把手112的一侧，解锁部40靠近把手112设置，解锁部40与把手112在水平方向的最小间距S不大于85mm。也就是说，解锁部40与把手112两者在水平方向上距离最近的点的距离不大于85mm。可选地，解锁部40与把手112在水平方向上的最小距离S为45mm。这样，操作者可以单手同时按住解锁部40和握持把手112，同时实现解锁和将电池包从外部设备中取出，操作方便快捷。
在一实施例中，电池包还包括用于沿滑动方向M与外部设备连接的适配部。滑动方向M即电芯的纵向，其基本平行于散热通道Q1的流通方向。适配部30设置于电池包壳体10的侧部，侧部可以是电池包壳体10的某一个侧面，也有可能是某几个侧面的全部或部分组合。在一实施例中，如图2和图6所示，电池包壳体10的侧部包括第一侧面13以及第三侧面15和第四侧面16投影到第一侧面13的部分。适配部30包括靠近顶面的第一端300、与第一端300相对的第二端301以及连接于第一端300与第二端301的两相对的侧壁302、303，两侧壁302、303之间分别设置有一对沿滑动方向M平行延伸的滑轨或滑槽304。
一对滑轨或滑槽的间距定义为第一宽度W1，侧部的最外边界具有垂直于滑动方向M的第二宽度，请参照图3，第二宽度W2指的是第一侧面13的宽度以及第一侧面15和第二侧面16投影到第一侧面13上的垂直于滑动方向M的宽度总和。第一宽度W1与第二宽度W2的比值在0.47-0.52之间，当第一宽度W1为64mm时，第二宽度W2为137mm时，第一宽度W1与第二宽度W2的比值为0.47；当第一宽度W1为67.5mm，第二宽度W2为137mm时，第一宽 度W1与第二宽度W2的比值为0.49；当第一宽度W1为71mm，第二宽度W2为137mm时，第一宽度W1与第二宽度W2的比值为0.52。
进一步地，滑轨或滑槽304的长度定义成第一高度H1，侧部的最外边界具有平行于滑动方向M的第二高度H2，如图4所示，第二高度H2指的是第一侧面13的高度，第一高度H1与第二高度H2的比值在0.48-0.5之间，当第一高度H1为80mm，第二高度H2为166mm时，第一高度H1与第二高度H2的比值为0.48；当第一高度H1为81mm，第二高度H2为166mm时，第一高度H1与第二高度H2的比值为0.49；当第一高度H1为83mm，第二高度H2为166mm时，第一高度H1与第二高度H2的比值为0.5。这样设置既能保证电池包结构紧凑，又能保证电池包在外部设备上连接稳固。
进一步地，适配部30还包括位于第二端301的端子容纳部，端子容纳部包括沿电芯纵向平行延伸的第一端子槽305、第二端子槽306、第三端子槽307、第四端子槽308和第五端子槽309，收容于第一端子槽305内用于与所述外部设备电连接的正极端子、收容于第二端子槽306内用于与外部设备电连接的负极端子、分别收容于第三端子槽307、第四端子槽308和第五端子槽309内用于与外部设备电连接的通信端子。通信端子用于传输电池包1的各种数据，收容通信端子的端子槽的数量不局限为3个，可以为2个，4个，5个等。可选地，第一端子槽305与第二端子槽306设置在端子容纳部的两端，位于一对滑轨或滑槽304之间。第三端子槽307、第四端子槽308和第五端子槽设置在第一端子槽305与第二端子槽306之间。可选地，第一宽度W1为67.5mm，第一高度H1为81mm，第二宽度W2为137mm，第二高度H2为166mm，滑轨或滑槽304的高度D为5.3mm，第一端子槽305与第二端子槽306之间的中心距离W3为37-42mm之间。这样设置可以使电池包1与外部设备之间的连接更加稳固可靠。
在一实施例中，解锁部40设置在第二侧面14上，适配部30与解锁部40设置在电池包壳体10的相对侧上，这样方便操作者在解锁电池包或者插接电池包时，电池包的受力比较均衡。
在一实施例中，适配部30不超出侧部的最外边界。也就是说，适配部30处于侧部最外边界限定的框架内。如图5所示，适配部30不超出于第一侧面13以及第三侧面15和第四侧面16投影到第一侧面13的最外边界。
在一实施例中，参照图2，电池包1还包括显示电池包1电量的电量显 示部41，电量显示部41包括电量显示按钮和若干电量显示灯，电量显示部41与电池包壳体10之间还设置有控制电池包1显示电量的电路板42，按压电量显示按钮时，操作者可以根据电量显示灯显示的数目，判断电池包1的电量。可选地，电量显示灯为6个，当然也可以是2个，3个或其他，电量显示灯为LED灯。进一步地，电量显示部41与适配部30位于电池包1的同一侧，也就是说，电量显示部41与适配部30可以位于电池包1的同一表面，或者如图2、图6所示，电量显示部41与适配部30不位于同一表面，但是二者在侧视方向的投影位于同一表面但又不会重叠。一般来说，电池包的电路板(未示出)会与适配部紧邻，而负责电量显示的电路板42会与电量显示部41紧邻，电量显示部41与适配部30位于电池包1的同一侧，就可以使电池包的电路板与电路板42位于同一侧，方便布置线路，节约空间和成本。
可选地，第二侧面14靠近顶面11的部位设置有向把手112倾斜的第一坡面141，解锁部40设置于第一坡面141，第一侧面13设置有与第一坡面141对应的第二坡面131，电量显示部41设置在第二坡面131。第一坡面141与第二坡面131对应指的是两者在竖直方向上大致处于同一高度，且第一坡面141与第二坡面131都是相应侧面在靠近顶面11的部位向把手112倾斜形成的坡面。这样可以减小占用电池包壳体在竖直方向上的面积，有利于电池包的小型化。可选地，第二坡面131上设置防护罩1310，防护罩1310用于覆盖至少部分电量显示部41，防止在雨淋时电量显示部进水。
在一实施例中，如图6所示，壳体中部设置有第三通风口140，可选地，第三通风口140设置在第二侧面14上，通过在电池包壳体10上增加了第三通风口140，可以增加冷却空气的通风量，获得更好的冷却电池包1的效果。
在一实施例中，第三通风口140与靠近底面12的电芯21在竖直方向上的投影至少部分重叠。这样，冷却空气从第三通风口140进入电池包内，可以先冷却靠近底面12的底部电芯，再冷却靠近顶面11的顶部电芯，对每节电芯都能起到冷却效果，从而实现对电芯的均匀冷却。
在一实施例中，请参阅图9，电池包1能够沿着滑动方向M滑动实现与外部设备连接与拆卸。当操作者按住解锁部40，电池包1沿着滑动方向自下而上相对外部设备滑动时，电池包1内的正极端子、负极端子、通信端子分别与外部设备上相应的配对端子脱开连接，从而适配部30与外部设备脱开连接，电池包1从外部设备上拆卸；当电池包1沿着滑动方向自上而下相对外 部设备滑动时，电池包1内的正负极端子、通信端子与外部设备上相应的配对端子连接，从而适配部30与外部设备连接，电池包1与外部设备连接。滑动方向M与散热通道Q1的流通方向基本平行，可以保证电池包1与外部设备连接后，电芯的排布方向与散热通道Q1的流通方向基本平行，从而保证电芯21能够被冷却空气最大范围冷却。
请参阅图10-图14，本发明还提供一种电动工具系统，包括电动工具主体5，以及与电动工具主体5可拆卸地连接的电池包1，此电池包1即为如上所述的电池包1，在此不再赘述。当电池包1配接于电动工具主体5时，气流能够由第一通风口121流经电芯21的至少部分外周表面从第二通风口111流出。在图10-图14中列举了电动工具主体5为链锯的情况，但电动工具主体5也可以为其他电动工具，如角磨，割草机，电锤，修枝剪等，对此不做限制。
电动工具主体5包括工具壳体50、收容于工具壳体50内的马达(未示出)、由马达驱动的输出部(未示出)，工具壳体50包括用于容纳至少部分电池包1的接收部51，接收部51包括与壳体下部相对设置的底面510，底面510设置有第一通风孔511，第一通风孔511能够与第一通风口121气流导通。通过在底面510设置有第一通风孔511，冷却空气从第一通风孔511进入电池包1内，即冷却空气由第一通风孔511进入第一通风口121，沿着散热通道Q1流通方向，从第二通风口111流出。这样在竖直方向上冷却空气不会被电动工具主体5遮挡，可以自下而上形成有效的散热通道，而且冷却空气以最短距离进入电池包1冷却，没有流失风量，对电芯21的冷却效果更好。
在一实施例中，接收部51与电池包1之间有间隙，气流能够由间隙进入第一通风口121，流经电芯21的至少部分外周表面从第二通风口111流出。如图12所示，接收部51包括与壳体中部相对设置的侧面512，侧面512与壳体中部之间设有供冷却空气流动的缝隙(未示出)。可选地，侧面512与第二侧面14相对设置，侧面512与第二侧面14之间有供冷却空气流动的间隙。当然，不仅是侧面512和第二侧面14之间设置间隙，壳体中部的其他侧面与接收部51相对应的表面都可以设置间隙，还可以在接收部51的底面510与电池包1的底面12之间设置间隙。这样，冷却空气可以从间隙分别进入第三通风口140和第一通风口121，进而进入电池包1内，沿着散热通道Q1流通方向，从第二通风口111流出。通过在接收部51与电池包1之间设置间隙， 可以增大冷却空气的进风量，冷却电芯21的效果更好。
在一实施例中，如图13、14所示，侧面512包括第二通风孔521，电动工具主体5还包括设置于工具壳体50内的风扇53，当电池包1收容于接收部51时，风扇53产生的气流包括：第一气流Q2，从第一通风口121吸入，流向第三通风口140；第二气流Q3，从第二通风口111吸入，流向第三通风口140，第一气流Q2与第二气流Q3于第三通风口140处合流，再从第二通风孔521流出。通过在电动工具主体5内设置风扇53，可以形成额外的第一气流Q2与第二气流Q3对电池包1进行冷却，冷却效果更好。
进一步地，由于风扇53的作用，第一气流Q2，从第一通风口121吸入，经过第一支架221的开口223，由导风板224引导，穿过电芯21后流向第三通风口140；第二气流Q3，从第二通风口111吸入，经过第二支架222的开口223，由导风板224引导，穿过电芯21后流向第三通风口140；最后，第一气流Q2与第二气流Q3于第三通风口140处合流，再从第二通风孔521流出，最后由电动工具主体5的出风口(未示出)排到空气中。
在一实施例中，请参阅图11，当电池包1配接于电动工具主体5时，电量显示部41外露于接收部51，这样便于在使用时观察电池包1的剩余电量。
在一实施例中，请参阅图11，当电池包1配接于电动工具主体5时，解锁部40外露于接收部51，这样便于操作者将电池包1脱离接收部51。
请参阅图15-图18，本发明还提供一种充电系统，充电系统包括充电器6和与充电器6可拆卸地连接的电池包1，充电器6包括充电器壳体60、设置于充电器壳体60内的充电电路(未示出)，此电池包1即为如上所述的电池包1，在此不再赘述。当电池包1配接于充电器6时，气流能够由第一通风口121流经电芯21的至少部分外周表面从第二通风口111流出。
充电系统与前述电动工具系统类似，下面再逐一介绍充电系统的冷却过程。
充电器壳体60也包括收容至少部分电池包的接收部61，接收部61包括与壳体下部相对设置的底面610，底面610设置有第一通风孔(未示出)，第一通风孔能够与第一通风口121气流导通。通过在底面610设置有第一通风孔，冷却空气从第一通风孔进入电池包1内，即冷却空气由第一通风孔进入第一通风口121，沿着散热通道Q1流通方向，从第二通风口111流出。这样在竖直方向上冷却空气不会被充电器6遮挡，可以自下而上形成有效的散热 通道，而且冷却空气以最短距离进入电池包1冷却，没有流失风量，对电芯21的冷却效果更好。
在一实施例中，接收部61与电池包1之间有间隙，间隙能够与第一通风口121气流导通。如图17所示，接收部61包括与壳体中部相对设置的侧面62，侧面62与壳体中部之间设有供冷却空气流动的缝隙(未示出)。可选地，侧面62与第二侧面14相对设置，侧面62与第二侧面14之间有供冷却空气流动的间隙。当然，不仅是侧面62和第二侧面14之间设置间隙，壳体中部的其他侧面与接收部51相对应的表面都可以设置间隙，还可以在接收部61的底面610与电池包1的底面12之间设置间隙。这样，冷却空气可以从间隙分别进入第三通风口140和第一通风口121，进而进入电池包1内，沿着散热通道Q1流通方向，从第二通风口111流出。通过在接收部61与电池包1之间设置间隙，可以增大冷却空气的进风量，冷却电芯21的效果更好。
在一实施例中，如、图18所示，侧面62包括第二通风孔621，充电器6还包括设置于充电器壳体60内的风扇63，当电池包1收容于接收部61时，风扇63产生的气流包括：第一气流Q4，从第一通风口121吸入，流向第三通风口140；第二气流Q5，从第二通风口111吸入，流向第三通风口140，第一气流Q4与第二气流Q5于第三通风口140处合流，再从第二通风孔521流出。通过在充电器6内设置风扇63，可以形成额外的第一气流Q4与第二气流Q5对电池包1进行冷却，冷却效果更好。
进一步地，由于风扇63的作用，第一气流Q4，从第一通风口121吸入，经过第一支架221的开口223，由导风板224引导，穿过电芯21后流向第三通风口140；第二气流Q5，从第二通风口111吸入，经过第二支架222的开口223，由导风板224引导，穿过电芯21后流向第三通风口140；最后，第一气流Q4与第二气流Q5于第三通风口140处合流，再从第二通风孔621流出，最后由充电器6的出风口(未示出)排到空气中。
在一实施例中，请参阅图16，电量显示部41外露于接收部61，这样便于在使用时观察电池包1的剩余电量。
在一实施例中，请参阅图16，解锁部40用于解除电池包1与充电器6的锁定，解锁部40外露于接收部61，这样便于操作者将电池包1脱离接收部61。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未 对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (28)

  1. 一种电池包，包括：
    电池包壳体；
    电芯组，设置在所述电池包壳体中，所述电芯组包括若干电性连接的电芯；所述电池包壳体包括壳体上部，以及与壳体上部相对设置的壳体下部，所述壳体下部设有第一通风口，所述壳体上部设置有第二通风口，其特征在于：所述电芯的纵向沿所述电池包壳体的上、下方向竖直布置，所述电池包内形成连通所述第一通风口和第二通风口的散热通道，所述电芯的至少部分外周表面处于所述散热通道内。
  2. 如权利要求1所述的电池包，其特征在于，所述电芯组具有若干个，若干个电芯组沿所述电芯的纵向叠合设置。
  3. 如权利要求1所述的电池包，其特征在于，所述第一通风口包括若干第一风孔，所述第二通风口包括若干第二风孔，所述若干第一风孔及若干第二风孔中任一横截面积的总和与所述电芯组的横截面积的比值均不小于0.2。
  4. 如权利要求1所述的电池包，其特征在于，所述电池包还包括设置在所述壳体上部和壳体下部之间的壳体中部，所述壳体中部设置有第三通风口。
  5. 如权利要求把1所述的电池包，其特征在于，所述电芯组包括用于固定电芯的支架，所述支架设置有若干开口，所述开口与所述散热通道连通。
  6. 如权利要求5所述的电池包，其特征在于，所述支架靠近电芯的一侧凸设有导风板，所述导风板能够改变所述散热通道内的气流流向。
  7. 如权利要求1所述的电池包，其特征在于，所述电池包壳体设有可供握持的把手，所述把手包括分别与电池包壳体连接的第一端部和第二端部，以及连接所述第一端部与第二端部的握持部，所述把手具有柔弹性以使所述握持部相对电池包壳体的距离可变化。
  8. 如权利要求7所述的电池包，其特征在于，所述把手采用橡胶材质。
  9. 如权利要求7所述的电池包，其特征在于，所述电池包还包括用于与外部设备连接的适配部，以及解除所述电池包与外部设备位置锁定的解锁部。
  10. 如权利要求9所述的电池包，其特征在于，所述解锁部位于所述把手的一侧，所述解锁部与所述把手在水平方向的最小间距不大于85mm。
  11. 如权利要求9所述的电池包，其特征在于，所述适配部与所述解锁部位于所述电池包的相对侧。
  12. 如权利要求7所述的电池包，其特征在于，设置所述把手的电池包壳体的表面设置有凹入面以及包围所述凹入面的边缘面，所述凹入面相对所述边缘面远离所述握持部，所述握持部在所述凹入面上的投影至少部分与凹入面重合。
  13. 如权利要求12所述的电池包，其特征在于，所述握持部与所述凹入面的间距在14-17mm之间。
  14. 如权利要求1所述的电池包，其特征在于，所述电池包包括用于沿滑动方向与外部设备连接的适配部，所述适配部设置在所述电池包壳体的侧部，所述适配部包括一对沿所述滑动方向平行延伸的滑轨或滑槽，一对滑轨或滑槽的间距定义成第一宽度，所述侧部的最外边界具有垂直于所述滑动方向的第二宽度，所述第一宽度与第二宽度的比值在0.47-0.52之间。
  15. 如权利要求14所述的电池包，其特征在于，所述滑轨或滑槽的长度定义成第一高度，所述侧部的最外边界具有平行于所述滑动方向的第二高度，所述第一高度与第二高度的比值在0.48-0.5之间。
  16. 如权利要求14所述的电池包，其特征在于，所述适配部不超出所述侧部的最外边界。
  17. 一种电动工具系统，包括电动工具主体，所述电动工具主体包括工具壳体、收容于工具壳体内的马达、以及由所述马达驱动的输出部，其特征在于，所述电动工具系统还包括权利要求1所述的电池包，所述工具壳体包括用于容纳至少部分所述电池包的接收部，所述电池包与所述电动工具主体可拆卸地连接，所述电池包为所述马达提供动力，当所述电池包配接于所述电动工具主体时，气流能够由所述第一通风口流经所述电芯的至少部分外周表面从第二通风口流出。
  18. 如权利要求17所述的电动工具系统，其特征在于，所述接收部包括用于与所述壳体下部相对设置的底面，所述底面设置有第一通风孔，所述第一通风孔能够与所述第一通风口气流导通。
  19. 如权利要求17所述的电动工具系统，其特征在于，所述接收部与所述电池包之间设有间隙，气流能够由所述间隙进入第一通风口，流经所述电芯的至少部分外周表面从第二通风口流出。
  20. 如权利要求17所述的电动工具系统，其特征在于，所述电池包还包括设置在所述壳体上部和壳体下部之间的壳体中部，所述壳体中部设置有第三通 风口，所述电动工具壳体还包括设置于所述工具壳体内的风扇，所述接收部包括与所述壳体中部相对设置的侧面，所述侧面设置有第二通风孔，当所述电池包收容于所述接收部时，所述风扇产生的气流包括：第一气流，从所述第一通风口吸入，流向所述第三通风口；第二气流，从所述第二通风口吸入，流向所述第三通风口；所述第一气流与第二气流于所述第三通风口处合流，再从所述第二通风孔流出。
  21. 如权利要求17所述的电动工具系统，其特征在于，所述电池包壳体设置有用于显示所述电池包电量的电量显示部，当电池包配接于所述电动工具主体时，所述电量显示部外露于所述接收部。
  22. 如权利要求17所述的电动工具系统，其特征在于，所述电池包包括锁定部以及解锁部，所述锁定部用于将电池包与电动工具主体的位置锁定，所述解锁部用于解除所述电池包与电动工具主体之间的位置锁定，所述解锁部外露于所述接收部。
  23. 一种充电系统，包括充电器，所述充电器包括充电器壳体、设置于所述充电器壳体内的充电电路，其特征在于，所述充电系统还包括权利要求1所述的电池包，所述充电器壳体包括用于收容至少部分电池包的接收部，所述电池包与所述充电器可拆卸地连接，当所述电池包配接于所述充电器时，气流能够由所述第一通风口流经所述电芯的至少部分外周表面从第二通风口流出。
  24. 如权利要求23所述的充电系统，其特征在于，所述接收部包括用于与所述壳体下部相对设置的底面，所述底面设置有第一通风孔，所述第一通风孔能够与所述第一通风口气流导通。
  25. 如权利要求23所述的充电系统，其特征在于，所述接收部与所述电池包之间设有间隙，气流能够由所述间隙进入第一通风口，流经所述电芯的至少部分外周表面从第二通风口流出。
  26. 如权利要求23所述的充电系统，其特征在于，所述电池包还包括设置在所述壳体上部和壳体下部之间的壳体中部，所述壳体中部设置有第三通风口，所述充电器还包括设置于所述充电器壳体内的风扇，所述接收部包括与所述壳体中部相对设置的侧面，所述侧面设置有第二通风孔，当所述电池包收容于所述接收部时，所述风扇产生的气流包括：第一气流，从所述第一通风口吸入，流向所述第三通风口；第二气流，从所述第二通风口吸入，流向所述 第三通风口；所述第一气流与第二气流于所述第三通风口处合流，再从所述第二通风孔流出。
  27. 如权利要求23所述的充电系统，其特征在于，所述电池包壳体设置有电量显示部，当电池包配接于所述充电器时，所述电量显示部外露于所述接收部。
  28. 如权利要求23所述的电动工具系统，其特征在于，所述电池包包括锁定部以及解锁部，所述锁定部用于将电池包与充电器的位置锁定，所述解锁部用于解除所述电池包与充电器之间的位置锁定，所述所述解锁部外露于所述接收部。
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Publication number Priority date Publication date Assignee Title
CN114243195A (zh) * 2021-11-02 2022-03-25 国网河南省电力公司安阳供电公司 一种高效更换验电器电池的装置
CN114243195B (zh) * 2021-11-02 2023-12-01 国网河南省电力公司安阳供电公司 一种高效更换验电器电池的装置
WO2023208196A1 (zh) * 2022-04-28 2023-11-02 苏州宝时得电动工具有限公司 电池包

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