WO2023208196A1 - 电池包 - Google Patents

电池包 Download PDF

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Publication number
WO2023208196A1
WO2023208196A1 PCT/CN2023/091600 CN2023091600W WO2023208196A1 WO 2023208196 A1 WO2023208196 A1 WO 2023208196A1 CN 2023091600 W CN2023091600 W CN 2023091600W WO 2023208196 A1 WO2023208196 A1 WO 2023208196A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
front side
battery pack
flow blocking
battery
Prior art date
Application number
PCT/CN2023/091600
Other languages
English (en)
French (fr)
Inventor
吴杰
樊秀斌
张桂豪
彭世警
李成重
Original Assignee
苏州宝时得电动工具有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 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 CN202380011740.2A priority Critical patent/CN117837007A/zh
Publication of WO2023208196A1 publication Critical patent/WO2023208196A1/zh

Links

Classifications

    • 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
    • H01M10/04—Construction or manufacture in general
    • 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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • 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
    • 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
    • H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch 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
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
    • 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
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
    • 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
    • H01M50/258—Modular batteries; Casings provided with means for assembling
    • 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
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/629—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances
    • H01R13/631—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances for engagement only
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R27/00—Coupling parts adapted for co-operation with two or more dissimilar counterparts
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/14—Mounting supporting structure in casing or on frame or rack
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/18—Construction of rack or frame
    • 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 present invention relates to the field of battery technology, and in particular to a battery pack.
  • a battery pack usually consists of a battery pack shell and a plurality of cells arranged in the battery pack shell.
  • the battery pack will generate a large amount of heat when discharging. If the battery pack cannot dissipate heat in time, it will reduce the charge and discharge cycle life of the battery system, affect the power and energy performance of the battery, and even cause thermal runaway, ultimately affecting the safety of the battery pack. performance and reliability. In addition, if the heat of the battery pack is too high and exceeds the minimum charging temperature, charging will not be possible.
  • Battery packs used in garden power tools such as lawn mowers are usually backpack-type.
  • an air inlet and an air outlet are usually provided on the battery pack as described in the CN207282574U patent, and multiple cells are disposed inside the battery pack to dissipate heat.
  • the user places the battery pack into the When it is carried on the body, the air inlet is located on the casing away from the human body. In this way, when the user is carrying the bag or placing the battery pack on the grass, the air inlet will be exposed to the air. If it rains, rainwater will flow into the battery pack from the air inlet, especially into the battery components. Internally, this will cause the inside of the battery pack to be soaked by rainwater, causing damage to the battery cells and other components.
  • the present application provides a battery pack that can prevent rainwater from entering the interior of the battery from the air inlet, and in particular, prevent rainwater from entering the interior of the battery cell assembly from the air inlet to avoid damage to the battery pack.
  • the present application provides a battery pack, including a shell and a battery core assembly.
  • the battery core assembly includes a plurality of battery cells; the shell includes a front side shell and a rear side shell.
  • the front side The housing and the rear side housing form a receiving cavity, and the battery core assembly is received in the receiving cavity.
  • the housing also includes a bottom surface, and an air inlet and an air outlet are provided on the housing. The air inlet is at least partially located in an area of the housing below the upper surface of the battery core closest to the bottom surface.
  • the rear side housing further includes a rear surface, and the air outlet is located on the rear side housing and within the rear surface.
  • the housing includes a bottom, and the air inlet is opened at the bottom of the housing.
  • the air inlet is opened in the front casing, and the air outlet is opened in the rear casing.
  • the casing is divided into an upper half casing and a lower half casing along the height direction, and the air outlet is located in the upper half casing.
  • the angle between the air flow direction of the air inflow from the air inlet and the front surface ranges from 0° to 50°.
  • the battery pack can be coupled with a backpack device to power the electric tool through the backpack device.
  • the weight of the battery pack is greater than or equal to 5kg.
  • the front side housing further includes a front surface
  • the rear side housing further includes a rear surface
  • the area of the front surface or the rear surface is greater than the area of the bottom surface
  • a first cooling air duct is formed between the front side housing and the battery core assembly, and a first cooling air duct is formed between the rear side housing and the battery core assembly.
  • a second cooling air duct is formed, and a third cooling air duct is formed between adjacent battery cores.
  • the first cooling air duct and the second cooling air duct are connected through the third cooling air duct, so The air inlet is connected to the first cooling air duct, and the air outlet is connected to the second cooling air duct.
  • At least one flow blocking portion is formed on the inner surface of the front side housing, and the flow blocking portion is located in the first cooling air duct and extends toward the direction of the rear surface.
  • the battery core assembly is defined to include an upper part, a middle part and a lower part in order from top to bottom, where the number of battery cores located in the upper part and the lower part respectively accounts for 20% of the total number of battery cells, and the resistance
  • the flow part includes a main flow blocking part, and the main flow blocking part is located in the first cooling air duct directly opposite to the middle part.
  • the flow blocking part includes a main flow blocking part, and in the direction of air flow, the main flow blocking part is located in a downstream area of the upper surface of the battery core where the temperature is highest.
  • the section perpendicular to the main air flow direction in the first cooling air duct is defined as a cross section, and the effective flow blocking area of the main flow blocking part occupies the inner space between the main flow blocking part and the front side shell. 40% to 90% of the cross-sectional area where the intersection point of the surface is located.
  • the flow blocking part further includes an auxiliary flow blocking part, which is disposed in an upstream region and/or a downstream region of the main flow blocking part in the flow direction of the airflow.
  • the effective blocking area of the auxiliary flow blocking part is smaller than the effective blocking area of the main flow blocking part
  • the effective flow blocking area of the auxiliary flow blocking part is not less than the effective flow blocking area of the main flow blocking part.
  • At least one flow blocking portion is formed on the inner surface of the rear side housing, the flow blocking portion is located in the second cooling air duct, and the flow blocking portion extends toward the front surface.
  • the battery pack further includes a main control board, which is disposed on the top of the battery cell assembly.
  • the air flowing in from the air inlet flows through the main control board, affecting the main control board. After heat dissipation, the heat is discharged from the air outlet to the outside of the casing.
  • a fourth cooling air duct is formed between the top of the housing and the main control board, and the first cooling air duct and the second cooling air duct are also connected through the fourth cooling air duct.
  • the main control board is provided with a heat sink, and the air flowing in from the air inlet flows through the heat sink.
  • the front side housing includes a first front side part and a second front side part rearward relative to the first front side part, and the first front side part and the second front side part form a step.
  • the housing further includes a connecting portion between the first front side portion and the second front side portion, and the air inlet is at least partially formed in the connecting portion.
  • the second front side is at least partially lower than the first front side, and the airflow flowing through the housing enters the connecting portion from below. Describe the air inlet.
  • the first front side part includes a lower edge
  • the air inlet is located behind the first front side part and at least partially higher than the lower edge of the first front side part, so that at least part of the air inlet is The air vent is not visible on the front side of the casing.
  • the air inlet is at least partially disposed within the step formed by the first front side part and the second front side part.
  • the connecting portion has an arcuate portion, the arcuate portion is provided on an upper side of the connecting portion, and the air inlet is formed on the arcuate portion.
  • a plurality of reinforcing ribs are installed between the first front side part and the connecting part, one end of the reinforcing ribs is fixedly connected to the first front side part, and the other end is fixedly connected to the connecting part.
  • the battery pack further includes a dust-proof structure, which is detachably connected to the front side case and is covered on the first front side when installed on the front side case. on the area between the side part and the second front side part to filter the airflow flowing into the air inlet through the dustproof structure.
  • a dust-proof structure which is detachably connected to the front side case and is covered on the first front side when installed on the front side case. on the area between the side part and the second front side part to filter the airflow flowing into the air inlet through the dustproof structure.
  • an included angle is formed with the first front side portion, and the included angle ranges from 20° to 90°.
  • one of the dust-proof structure and the front side housing is provided with a first plug connector
  • the other of the dust-proof structure and the front side housing is provided with a first plug connector.
  • the first plug connector is installed with a mating second plug connector.
  • the dust-proof structure includes a dust-proof bracket and a dust-proof net.
  • the dust-proof bracket has at least one hollow portion. At least one of the hollow portions is paved with the dust-proof net.
  • the dust-proof net is provided with Several dust holes for airflow.
  • the dust-proof bracket includes a first dust-proof bracket and a second dust-proof bracket, and the dust-proof net is sandwiched between the first dust-proof bracket and the second dust-proof bracket.
  • the present application also provides a battery pack, including: a casing and a battery core assembly.
  • the battery core assembly includes a plurality of battery cells;
  • the casing includes a front side housing and a rear side housing.
  • the front side housing and the rear side housing form a receiving cavity, the battery core assembly is received in the receiving cavity, the housing is provided with an air inlet and an air outlet, and the front side housing includes a third A front side part, and a second front side part rearward relative to the first front side part, the housing further includes a connecting part between the first front side part and the second front side part, so The air inlet is at least partially formed in the connecting portion.
  • the second front side is at least partially lower than the first front side, and the airflow flowing through the housing enters the connecting portion from below. Describe the air inlet.
  • the first front side part includes a lower edge
  • the air inlet is located behind the first front side part and at least partially higher than the lower edge of the first front side part, so that the at least part of the air inlet is The air vent is not visible on the front side of the casing.
  • the housing includes a bottom, and the air inlet is provided close to the bottom of the housing.
  • the air inlet is at least partially disposed within the step formed by the first front side part and the second front side part.
  • the present application also provides a battery pack, including a housing and a battery core assembly.
  • the battery core assembly includes a plurality of battery cells; the housing includes a front side housing and a rear side housing. The front side housing and the rear side housing form a receiving cavity, and the battery core assembly is received in the receiving cavity.
  • the housing is provided with an air inlet and an air outlet, and the air inlet and the housing are The distance between the bottom surfaces is: 0mm ⁇ 80mm.
  • the distance between the air inlet and the bottom surface of the housing is: 0 mm ⁇ 50 mm.
  • the air inlet is disposed in the area below the upper surface of the battery cell closest to the bottom surface of the casing. In this way, the airflow flows from the air inlet into the interior of the casing and then flows along the height direction of the casing. , and then flowing into the battery core component can not only take away the heat emitted by the battery core component during operation through the flowing air.
  • the air inlet since the air inlet is located in the area below the upper surface of the battery cell closest to the bottom surface of the case, when the battery pack is used outdoors and it rains, it is difficult for rainwater to flow into the battery pack from the air inlet.
  • Figure 1 is a schematic diagram of a scene in which a battery pack is installed on a backpack device provided by this application to provide power for an electric tool;
  • Figure 2 is a schematic diagram of a scene in which a battery pack is directly plugged into the charger provided by this application to charge the battery pack;
  • FIG. 3 is a schematic three-dimensional structural diagram of the battery pack provided by this application.
  • Figure 4 is another schematic diagram of the three-dimensional structure of the battery pack provided by this application.
  • FIG. 5 is a schematic diagram of the rear structure of the battery pack provided by this application.
  • Figure 6 is a schematic cross-sectional structural diagram of the air duct along the up and down direction of the battery pack provided by this application;
  • Figure 7 is an enlarged structural schematic diagram of area E in Figure 6;
  • Figure 8 is a schematic structural diagram of the main control board, the first collection board, the second collection board and the battery core assembly in the battery pack provided by this application;
  • Figure 9 is a schematic diagram of the exploded structure of the battery pack casing provided by this application.
  • Figure 10 is an enlarged structural schematic diagram of area F in Figure 9;
  • Figure 11 is a schematic three-dimensional structural diagram of the battery pack provided by the present application with the dust-proof structure removed from the casing;
  • Figure 12 is an enlarged structural schematic diagram of the G area in Figure 10;
  • Figure 13 is a schematic cross-sectional structural diagram along the width direction of the battery pack case provided by the present application.
  • a battery pack 500 is provided.
  • the battery pack 500 is installed on an electric tool 100 to provide power to the electric tool 100 .
  • the electric tool 100 may include a push lawn mower, a hair dryer or a Lawn trimmer etc.
  • the battery pack 500 is installed on the backpack device 300 of the hair dryer or the lawn mower to provide power to the hair dryer or the lawn mower.
  • the battery pack 500 requires a large capacity.
  • the capacity of the battery pack 500 in this embodiment is greater than 0.4kw/h, and can provide power for electric tools with long working hours or high output power.
  • the charging rate of the battery pack 500 is not less than 6C, and the discharge rate is not less than 4C. Much faster than any power tool battery pack currently on the market.
  • the battery 500 in this embodiment is a backpack-type battery, and the weight of the battery 500 is greater than or equal to 5kg.
  • the battery pack 500 also includes a charge and discharge interface 510 , a locking portion 561 and sliding guide rails 570 located on both sides of the charge and discharge interface 510 .
  • the battery pack 500 is connected to the battery pack through the sliding guide rails 570 .
  • the corresponding sliding guide rails on the charger 400 or the backpack device 300 are slidably connected, so that the battery pack 500 is slidably and detachably electrically connected to the charger 400 or the backpack device 300 .
  • the locking portion 561 is locked with the locking piece on the charger 400 or the backpack device 300, so as to fix the battery pack 500 to the charger 400 or the backpack device.
  • the charging and discharging interface 510 establishes an electrical connection with the charger 400 or the backpack device 300.
  • the battery pack 500 provided in this embodiment also has a human-computer interaction module 550 , and the human-computer interaction module 550 is close to the handle 501 of the battery pack.
  • the human-computer interaction module 550 includes a plurality of indication units and operation buttons, such as a Bluetooth indication unit, a power indication unit, a fault indication unit, etc., where the indication unit may be an indicator light.
  • the power indicator unit is used to display the power
  • the Bluetooth indicator unit is used to display the Bluetooth connection status
  • the fault indicator unit is used to display the fault status.
  • the button is used to display the charge level of the battery pack when pressed.
  • the charger 400 or the backpack device 300 is slidably and detachably connected to the battery pack 500 at the rear of the battery pack 500 .
  • the front, rear, left, right, up and down directions of components and structures may be based on the position of the charger 400 or backpack device 300 relative to the battery pack 500 . That is, when the battery pack 500 is installed on the charger 400 or the backpack device 300, and the charger 400 or the backpack device 300 is located behind the battery pack 500, then the front is opposite to the rear. It is defined that the battery pack 500 is slid into the charger 400 or the backpack.
  • the direction of the device 300 is the up-down direction, the battery pack 500 slides from top to bottom, and the direction perpendicular to the up-down direction and the front-rear direction is the left-right direction.
  • the sliding direction of the battery pack 500 that is, the up-down direction, is defined as the height direction of the battery pack, the battery pack 500, and the casing.
  • the casing In the height direction of the battery pack 500 and the casing, the casing has a top and a bottom opposite to the top.
  • the front and rear directions of the battery pack 500 are also defined as the width direction of the battery pack 500
  • the left and right directions of the battery pack 500 are defined as the length of the battery pack 500 direction.
  • the battery pack 500 of this embodiment can not only be installed on the power tool, but also can be installed on the backpack device to power the power tool, the battery pack 500 of this embodiment needs to be designed with a more appropriate size to adapt to different applications. Application scenarios.
  • the battery pack 500 has a length L ranging from 240mm to 280mm, a width W ranging from 110mm to 150mm, and a height H ranging from 280mm to 365mm.
  • the battery pack 500 has a length L of 260 mm, a width W of 132 mm, and a height H of 360 mm.
  • the battery pack 500 includes a shell.
  • the shell includes a front shell 502 and a rear shell 503 opposite to the front shell 502 .
  • the front shell 502 includes a front surface
  • the rear side housing 503 includes a rear surface
  • the housing also includes a bottom surface.
  • the front side housing 502 includes a first front side part 5021 and a second front side part 5022, and the outer surface of the first front side part 5021 forms the front surface.
  • the bottom of the housing is defined as the area below the first front side part 5021.
  • the bottom of the housing may also specifically refer to the bottom surface of the housing.
  • the housing has a handle 501, and the handle 501 is located on the top of the housing, so that the user can install or take the battery pack 500 by holding the handle 501.
  • the front housing 502 and the rear housing 503 both include handle portions, and the front housing 502 and the rear housing 503 snap together the two rear handle portions to form the handle 501 of the battery pack.
  • the front case 502 and the rear case 503 enclose a receiving cavity 100A for receiving the battery core assembly 520 , and the battery core assembly 520 is received in the receiving cavity 100A of the housing.
  • the front housing 502 and the rear housing 503 are two structures separated in the front-rear direction, and they are connected by snap-fitting.
  • the housing may also be an integrated structure in the front-to-back direction.
  • the front side housing 502 and the rear side housing 503 may refer to the front and rear parts of the housing, and do not refer to two parts in the front-to-back direction. structure.
  • the structure of the casing of the battery pack 500 is not specifically limited here and is subject to actual conditions.
  • the battery core assembly 520 includes a plurality of battery cores 521 and a battery core bracket 522 for supporting the battery cores 521 .
  • the battery core 521 is a rectangular sheet-shaped battery cell, such as a soft-packed battery cell.
  • the sheet-shaped design can increase the heat dissipation area of the battery core and prevent the internal temperature of the battery core from rising during the charging and discharging process; among them, the battery core 521 with a sheet-shaped design They can be stacked along the height direction of the casing, or arranged at intervals along the left-right or front-rear direction perpendicular to the casing height direction.
  • the shape of the battery core 521 may also be cylindrical.
  • the cylindrical battery core 521 is arranged in the housing and supported in the battery core bracket 522.
  • the shape and specific arrangement of the multiple battery cores 521 are not determined in this embodiment. Specific limitations shall prevail, subject to actual conditions.
  • the battery core 521 is supported in the battery core bracket 522.
  • the battery core bracket 522 may not be provided, and the battery core 521 may be supported on the housing.
  • the battery pack 500 is also provided with a heat dissipation structure.
  • the heat dissipation structure includes an air inlet 505 and an air outlet 504 provided on the casing.
  • the air inlet 505 is opened in the front side case 502, and the air inlet 505 is at least partially located in the area below the upper surface of the battery core 521 closest to the bottom surface of the case.
  • the battery core 521 closest to the bottom surface is the lowest battery core 521, and the air inlet 505 is at least partially located on the lowest layer of the casing.
  • the area below the upper surface of the lower battery core 521 is located at the bottom of the housing.
  • the distance between the air inlet 505 and the bottom of the housing is: 0 mm to 80 mm. Further, the distance between the air inlet 505 and the bottom of the casing is 0 mm to 50 mm. In this embodiment, when the distance between the air inlet 505 and the bottom of the casing is 0 mm to 50 mm, the air inlet 505 is at least partially located in the area below the upper surface of the lowest battery core 521 on the casing.
  • the angle between the air flow direction of the air inlet 505 and the front surface ranges from 0° to 50°, which can reduce the resistance of the air flow and improve the heat dissipation effect of the battery assembly 520 .
  • the air flow direction of the air inlet 505 is substantially parallel to the front surface, the air flow flows along the height direction of the casing, so that the air flow encounters the smallest resistance.
  • the air outlet 504 is opened in the rear casing 503, and the casing is divided into an upper half casing and a lower half casing along the height direction, and the air outlet 504 is located in the upper half casing. . More specifically, the air outlet is at position 504 It is located adjacent to the charging and discharging interface 510 and close to the top of the battery pack 500 .
  • the fan in the charger 400 is started to form a negative pressure to drive the air flow, so that the air flow enters from the air inlet 505 and flows along the height direction of the case, and flows through the battery assembly 520 After the inside of the battery pack 500 dissipates heat, it is discharged from the air outlet 504 to the outside of the case.
  • the air inlet 505 is disposed in the area below the upper surface of the battery core 521 closest to the bottom surface of the casing, the airflow flows from the air inlet 505 into the interior of the casing along the height of the casing.
  • the flow in the direction and then flowing into the battery core assembly 520 can not only take away the heat dissipated by the battery core assembly 520 during operation through the flowing air.
  • the air inlet 505 is located in the area below the upper surface of the battery core 521 closest to the bottom surface of the casing, when the battery pack 500 is used outdoors for carrying work or charging and it rains, the rain will It is difficult for the air inlet 505 to flow into the interior of the battery pack 500 .
  • a first cooling air channel A is formed between the front housing 502 and the battery core assembly 520 , and the rear housing 503 and the battery core assembly 520 are A second cooling air channel B is formed between them.
  • a first cooling air channel A is formed between the front surface of the battery holder 522 and the front case 502
  • a second cooling air channel A is formed between the rear surface of the battery holder 522 and the rear case 503 .
  • the first cooling air duct A is formed on the front side casing 502 and a plurality of stacked batteries.
  • the second cooling air channel B is formed between the rear case 503 and the plurality of stacked battery cores 521 .
  • two spaced positioning posts 5221 are provided on the surface of the battery holder 522 facing the front case 502 and the rear case 503 respectively.
  • the positioning posts 5221 are used to position the battery core assembly 520 Positioned within the casing to prevent the battery core assembly 520 from shaking in the casing.
  • the two positioning posts 5221 located on the surface of the battery core assembly 520 facing the front side housing 502 simultaneously define the first cooling air duct A. That is, the first cooling air duct A consists of the front side housing 502 and the battery core bracket 522
  • the surface facing the front surface and the two positioning posts 5221 are jointly defined.
  • the positioning posts 5221 used to define the first cooling air channel A are disposed on the surface of the cell support 522 facing the front surface.
  • the two positioning posts 5221 located on the surface of the cell assembly 520 facing the rear case 503 simultaneously define the second cooling air duct B, that is, the second cooling air duct B is directed by the rear case 503 and the cell bracket 522
  • the surface of the rear surface and the two positioning posts 5221 located on the surface of the cell support 522 facing the rear side shell are jointly defined.
  • the positioning posts 5221 used to define the second cooling air duct B are provided. On the surface of the cell holder 522 facing the rear surface.
  • the number of battery cells 521 can be 15, and the nominal voltage of each battery cell is 4V, so that the nominal voltage of the entire battery pack 500 reaches 60V, so as to support large-scale applications. Power power tools for work.
  • the number of battery cores 521 can also be 10, and the nominal voltage of each battery core is 6V.
  • the number of battery cores 521 and the voltage of each battery core 521 are not specifically limited here, and are subject to actual conditions.
  • the plurality of sheet-shaped battery cells 521 in the battery pack 500 and the battery cell brackets 522 supporting the battery cells 521 are stacked along the thickness direction of the battery cells, that is, the height direction of the battery pack, and airflow gaps are reserved between adjacent battery cells 521.
  • the airflow gap forms a third heat dissipation channel C for dissipating heat from the battery core 521 .
  • the first heat dissipation air channel A and the second heat dissipation air channel B are connected through the third heat dissipation air channel C.
  • the air inlet 505 is connected with the first heat dissipation air channel A, and the air outlet 504 Connected to the second cooling air duct B Pass.
  • the fan on the charger 400 is usually located at the air outlet 504 of the battery pack 500 .
  • the airflow flows in from the air inlet 505.
  • the airflow flows in the first cooling air duct A, that is, flows from the side surface of the battery core assembly 520 to dissipate heat of the battery core assembly 520, and the airflow flows in the first cooling air duct A. While flowing in the air duct A, it also flows through the third heat dissipation channel C between each adjacent battery core 521 to take away the heat generated by the battery core 521. After dissipating heat to the battery core 521, it flows through the second cooling air. Channel B then flows out from the air outlet 504 to the outside of the casing.
  • the charge and discharge control device of the battery pack 500 includes a main control board 541 and a collection board.
  • the acquisition board is used to collect parameter information of the battery pack and send the parameter information to the main control board 541.
  • the main control board 541 controls the charging and discharging process of the battery pack according to the parameter information of the battery pack.
  • the parameter information of the battery pack 500 includes the voltage of the battery pack and the temperature of the battery pack.
  • the tabs of each battery core 521 in the battery pack 500 are respectively located on both sides of the battery core 521, so the collection board includes two, namely the first collection board 542a and the second collection board 542b. The first collection board 542a and the second collection board 542b.
  • the board 542a and the second collection board 542b are respectively located on both sides of the battery core assembly 520.
  • the first collection board 542a is connected to the positive electrodes of the plurality of battery cells 521, and the second collection board 542b is connected to the negative electrodes of the plurality of battery cells 521.
  • 542a is connected to the main control board 541 through a first wire (not shown), and the second acquisition board 542b is connected to the main control board 541 through a second wire (not shown), so as to send the collected parameter information of the battery pack 500 to the main control board 542a.
  • the first collection board 542a and the second collection board 542b are respectively provided with temperature collection units for collecting the temperature of the battery core.
  • the temperature acquisition unit may be a thermistor.
  • the main control board 541 is provided separately from the first collection board 542a and the second collection board 542b, and the main control board 541 is provided on the top of the battery core assembly.
  • a fourth heat dissipation channel D is formed between the main control board 541 and the housing opposite to the main control board 541 .
  • the housing since the housing includes a front housing 502 and a rear housing 503, the fourth heat dissipation channel D consists of the main control board 541 and the front housing 502 and the rear housing opposite to the main control board 541. It is surrounded by the inner surface of the body 503.
  • the wind flows in from the air inlet 505, it not only dissipates heat to the battery core assembly 520 through the first heat dissipation channel A, the second heat dissipation channel B and the third heat dissipation channel C, but also flows from the first heat dissipation channel A.
  • the fourth heat dissipation channel D After reaching the top of the battery core assembly 200, it then flows through the fourth heat dissipation channel D to dissipate heat from the main control board 541, thereby taking away the heat generated by the components on the main control board 541.
  • the first heat dissipation air duct A and the second heat dissipation air duct B are also connected through the fourth heat dissipation air duct D, and the fourth heat dissipation air duct D is connected with the air outlet 504 through the second heat dissipation air duct B.
  • the main control board 541 is also provided with a heat sink 544 for dissipating heat from the heating components on the main control board 541 .
  • the heat sink 544 of the main control board 541 is located in the fourth cooling air duct D.
  • the air flow in the air duct flows through the heat sink 544, cooling the heat sink 544, which not only makes the battery pack
  • the temperature rise rate of the battery pack 500 is reduced during the charging and discharging process, ensuring that the temperature rise of the battery pack 500 does not reach the temperature protection threshold after the charging and discharging is completed, so that the battery pack 500 can be used uninterruptedly.
  • it can avoid the temperature of the main control board 541 being too high and causing the performance of the main control board 541 to deteriorate.
  • the airflow flows toward the air outlet 504 along the height direction of the battery pack 500 , that is, the first airflow channel A under the action of air pressure. And the closer to the fan (air outlet 504), the stronger the pressure, so most of the airflow flows to the battery cells close to the air outlet 504, resulting in unsatisfactory heat dissipation of the battery cells far away from the air outlet 504, which in turn causes the bottom of the battery cell assembly 520 to The temperature of the battery core 521 is higher than that of the battery core 521 at the top.
  • the heat generated by the different battery cells 521 is basically the same.
  • the heat dissipation condition of the battery core 521 in the middle position is poor, and the heat dissipation condition of the battery core 521 is poor.
  • the battery core 521 located on the upper and lower sides has better heat dissipation conditions.
  • the temperature of the middle part of the battery pack 500 is higher and the temperature of both sides is lower.
  • the air flow rate flowing through the battery core 521 with a higher temperature is greater than
  • the air flow flowing through the lower-temperature battery core 521 reduces the temperature of the battery core assembly 520. end temperature difference.
  • at least one flow blocking portion 506 is provided on the inner surface of the front case 502 of the battery pack 500 , and the flow blocking portion 506 is located in the first cooling air duct A.
  • the blocking portion 506 can distribute the flow rate of the airflow flowing through the blocking portion 506 so that more airflow flows through the third cooling air duct C adjacent to the battery core 521 with a higher temperature, thereby increasing the The gas flow dissipates heat from the higher-temperature battery cells 521 , thereby improving the temperature uniformity within the battery pack 500 .
  • at least one flow blocking portion 506 is provided on the inner surface of the first front side portion 5021 , and the flow blocking portion 506 extends toward the rear surface.
  • the flow blocking portion 506 can be a rectangular plate-shaped structure, a cylinder, a boss, etc.
  • the specific structure of the flow blocking rib 506 is not specifically limited here and is subject to actual requirements.
  • the flow blocking portion 506 can not only play a flow blocking role, but also can play a supporting role.
  • the at least one flow blocking part 506 includes a main flow blocking part 5061 .
  • the main flow blocking part 5061 is disposed above the lower surface of the battery core 521 with the highest temperature. area, where the lower surface of the highest-temperature battery core 521 refers to the surface of the highest-temperature battery core 521 facing the bottom surface of the battery pack 500 .
  • the main flow blocking portion 5061 is disposed in the downstream area of the upper surface of the battery core 521 with the highest temperature.
  • the upper surface of the battery core 521 with the highest temperature that is, the surface of the battery core 521 with the highest temperature faces the bottom surface of the battery pack 500 .
  • the airflow flowing through the battery core 521 with the highest temperature can be increased, thereby reducing the temperature of the battery core 521 with the highest temperature, and improving the temperature uniformity within the battery pack 500 .
  • the battery core assembly 520 is defined to include an upper part, a middle part, and a lower part in order from top to bottom. After research by technicians, it is found that when the number of battery cores 521 located in the upper and lower parts respectively accounts for 20% of the total number of battery cores, the main flow blocking rib 5061 is arranged in the middle of the battery core assembly 520 facing the first cooling air. The flow blocking effect is better when in lane A.
  • the middle part has an upper boundary and a lower boundary, then the main flow blocking ribs 5061 are arranged in the first cooling air duct A facing the middle part of the battery core assembly 520.
  • the main flow ribs 5061 are arranged in the clamping In the first cooling air duct A between the upper boundary and the lower boundary.
  • the upper part is the area counting from the topmost battery core 521 down to the third battery core 521
  • the lower part is the area starting from the bottom battery core 521 and counting up to the third battery core 521.
  • the area of the three-cell battery core 521 that is, the middle portion refers to the portion between the lower boundary of the upper third-cell battery core and the upper boundary of the lower third-cell battery core in the battery core assembly 520 .
  • the main blocking rib 561 is disposed in the first cooling air channel A between the lower boundary of the upper third battery cell and the upper boundary of the lower third battery cell.
  • the section perpendicular to the main air flow direction in the first cooling air duct A is defined as a cross section.
  • the effective flow blocking area of the main flow blocking portion 5061 accounts for When the area of cross-section b where the intersection a of 5061 and the inner surface of the front case 502 is located is 40% to 90%, it can not only ensure the heat dissipation of the battery core 521 with the highest temperature, but also ensure that it is aligned with the main flow blocking part 5061 Heat dissipation of the upper battery core 521.
  • the effective blocking area refers to the projected area of the main blocking portion 5061 on the cross-section b where the intersection point a of the main blocking portion 5061 and the inner surface of the front housing 502 is located.
  • both the first cooling air duct A and the main flow blocking ribs 5061 are rectangular parallelepiped structures, the first cooling air duct A is arranged in the up and down direction, and the main flow blocking portion 5061 extends in the front and rear direction. At this time, when the extension height of the flow blocking portion 5061 accounts for 10% of the width d of the first cooling air duct A in the front-to-back direction,
  • the main flow blocking part 5061 is a complete rectangular parallelepiped plate-shaped structure.
  • the main flow blocking part 5061 can also be provided with a comb-shaped structure, or holes are provided on the plate-shaped structure. , or a groove is provided on the side facing the battery core 521. Preferably, the groove is provided in the middle position in the front and rear direction.
  • the shape of the main flow blocking part 5061 is not specifically limited here, as long as the effective flow blocking area of the main flow blocking part 5061 occupies the cross section b where the intersection point a of the main flow blocking part 5061 and the inner surface of the front side housing 502 is located. 40% to 90% of the area is enough.
  • an auxiliary flow blocking portion 5062 can also be provided.
  • the auxiliary flow blocking part 5062 may be disposed in an upstream area of the main flow blocking part 5061 or in a downstream area of the main flow blocking part 5061.
  • the effective flow blocking area of the auxiliary flow blocking part 5061 is smaller than the effective flow blocking area of the main flow blocking part 5061.
  • the effective blocking area of the auxiliary blocking portion 5061 increases sequentially in the flow direction of the airflow. This can further improve the heat dissipation effect on the battery core 521 located upstream of the main flow blocking portion 5061.
  • the effective flow blocking area of the flow blocking portion 506 should increase sequentially from bottom to top, that is, in the direction away from the air inlet 505 .
  • technicians have found through experimental verification based on the above theoretical research that when the auxiliary choke part 5061 is disposed in the downstream area of the main choke part 5061, and the effective choke areas of some of the auxiliary choke parts 5062 are the same, the battery pack 500 can still be satisfied. Internal temperature uniformity requirements.
  • the effective flow blocking area of the auxiliary flow blocking part 5062 is not less than the effective flow blocking area of the main flow blocking part 5061.
  • the effective flow blocking area of the auxiliary flow blocking portion 5062 increases sequentially in the flow direction of the airflow. This can further improve the heat dissipation effect on the battery core 521 located downstream of the main flow blocking portion 5061, and further balance the temperature within the battery pack 500.
  • the shape of the auxiliary flow blocking part 5062 is a complete plate-like structure.
  • the shape of the auxiliary flow blocking part 5062 may also be a comb shape or holes may be provided on the plate-like structure. , or a groove is provided on the side facing the battery core 521. Preferably, the groove is provided in the middle position in the front and rear direction.
  • the shape of the auxiliary flow blocking part 5062 is not specifically limited here, as long as the effective flow blocking area of the auxiliary flow blocking part 5062 meets the requirements.
  • the flow blocking portion 506 is disposed in the first cooling air duct A.
  • the flow blocking portion 506 can also be disposed in the second cooling air duct B, or in the first cooling air duct A flow blocking portion is provided in both A and the second cooling air duct B.
  • the flow blocking portion is disposed in the second cooling air duct B, the flow blocking portion is disposed on the inner surface of the rear case and extends toward the front surface.
  • the specific position, size and shape of the flow blocking portion are not specifically limited here and are subject to actual conditions.
  • the housing further includes a connection portion 5023 between the first front side portion 5021 and the second front side portion 5022 , and the air inlet 505 is at least partially formed in Connection part 5023.
  • the connection portion 5023 formed with the air inlet 505 is disposed between the first front side portion 5021 and the second front side portion 5022, so that the air inlet 505 can be hidden in the first front side portion 5021 and the second front side portion 5022. Thereby, a hidden structure is formed, which can prevent rainwater from flowing into the interior of the battery pack 500 from the air inlet 505 while having a beautiful structure.
  • an air inlet cavity 100B is formed between the first front side part 5021 and the connecting part 5023. The airflow flows into the air inlet cavity 100B and then flows into the interior of the casing from the air inlet 505 .
  • the first front side part 5021 and the second front side part 5022 are formed with steps 502A.
  • the air inlet 505 is at least partially disposed within the step 502A formed by the first front side part 5021 and the second front side part 5022, that is, the air inlet 505 is located between the first front side part 5021 and the second front side part 5022 and viewed from the front within the invisible area. In this way, the air inlet 505 is hidden to further prevent rainwater from entering.
  • the second front side portion 5022 is at least partially lower than the first front side portion 5021, and the airflow flowing through the housing enters the air inlet from below the connecting portion 5023. 505.
  • the first front side part 5021 includes a lower edge, and the air inlet 505 is located behind the first front side part 5021 and at least partially higher than the lower edge of the first front side part 5021, so that at least part of the air inlet 505 is on the front side of the housing. Invisible, so that the air inlet 505 Hidden behind the first front side part 5021.
  • the connecting portion 5023 has an arc portion 5023A.
  • the arc portion 5023A is formed on the upper side of the connecting portion 5023
  • an air inlet 505 is formed on the arc portion 5023A.
  • the air inlet 505 includes a plurality of air inlets 5051, in order to prevent external dust or foreign matter from entering the interior of the battery pack 500 through the large-area air inlet 5051, thereby affecting the components in the battery pack 500. Setting the number of air inlet holes 5051 to several and the size of each air inlet hole 5051 being small can not only ensure the ventilation area, but also form a filtering structure to reduce external dust or foreign matter from entering the battery pack 500 .
  • the air inlet area of the air inlet hole 5051 is 3 square millimeters to 20 square millimeters.
  • shape of the air inlet hole 5051 can be circular, square, triangular, or other regular or irregular shapes.
  • the shape of the air inlet 5051 is not specifically limited here, and is subject to the actual situation.
  • the diameter of the air inlet hole 5051 is 2 mm to 5 mm.
  • the connecting portion 5023 is formed with a partial arc design of the air inlet 505, the area of the connecting portion 5023 with the air inlet 505 formed in the limited space is increased, thereby increasing the number of the air inlet holes 5051, thus improving the air intake.
  • Air volume Preferably, in this embodiment, the arc portion 5023A is spherical.
  • the first A number of reinforcing ribs 5024 are installed between the front side part 5021 and the connecting part 5023.
  • One end of the reinforcing ribs 5024 is fixedly connected to the first front side part 5021, and the other end is fixedly connected to the connecting part 5023.
  • the reinforcing rib 5024 can also support the first front side part 5021 and the connecting part 5023 to improve the installation strength of the two.
  • the number of the reinforcing ribs 5024 is multiple, and the multiple reinforcing ribs 5024 are arranged at intervals.
  • the battery pack 500 of this embodiment also includes a dust-proof structure 590 .
  • the dust-proof structure 590 is located outside the front case 502 and on the airflow path flowing through the air inlet 505 .
  • the dust-proof structure 590 is detachably connected to the bottom of the front housing 502, and covers the area between the first front side part 5021 and the second front side part 5022 when installed on the front side housing 502.
  • the dust-proof structure 590 to filter the airflow flowing into the air inlet 505 through the dust-proof structure 590 to prevent external dust or foreign matter from entering the battery pack 500 and thereby avoiding affecting the components in the battery pack 500 .
  • the plurality of air inlet holes 5051 constitute a filtering structure, the airflow will be filtered twice after passing through the dustproof structure 590 and the filtering structure, thus further improving the dustproof effect.
  • a first plug connector 5025 is provided on one of the dust-proof structure 590 and the front housing 502
  • a first connector 5025 is provided on the other of the dust-proof structure 590 and the bottom of the front housing 502 .
  • the first plug connector 5025 is installed with the mating second plug connector 593 .
  • One of the first plug connector 5025 and the second plug connector 593 is a mounting hole
  • the other of the first plug connector 5025 and the second plug connector 593 is a mounting post that is plug-fitted with the mounting hole.
  • the cooperation of the first plug connector 5025 and the second plug connector 593 enables the dust-proof structure 590 to be easily detached or installed from the front side housing 502 .
  • the dust-proof structure 590 needs to be cleaned or replaced, the dust-proof structure 590 can be cleaned or replaced by disassembling the dust-proof structure 590 from the front housing 502, which is easy to operate.
  • the first connector 5025 is a mounting hole, which is provided on the mounting seats on both sides of the air inlet chamber 100B
  • the second connector 593 is a mounting post.
  • the dust-proof structure 590 can be installed on the bottom of the front housing 502 after inserting the mounting post into the mounting hole, and the dust-proof structure 590 can be removed from the front housing 502 after the mounting post is pulled out of the mounting hole.
  • the installation holes are provided on the installation parts on both sides of the air inlet chamber 100B.
  • the installation holes are also provided on the reinforcing ribs 5024, and the installation posts are provided on the dust-proof structure 590. corresponding location.
  • the number of the first plug connector 5025 and the second plug connector 593 is multiple to ensure the stability of the dustproof structure 590 installed on the front housing 502.
  • the specific number of the component 5025 and the second plug connector 593 can be set according to actual needs, for example, three, four, five, six, etc.
  • the first plug connector 5025 and the second plug connector 593 can also have other matching structures, which are not specifically limited here, such as matching magnetic parts and magnets, and matching buckles and holding parts. wait.
  • the dust-proof structure 590 when the dust-proof structure 590 is installed on the front housing 502 , the dust-proof structure 590 is covered on the air inlet chamber 100B, and the dust-proof structure 590 is connected to the rear surface.
  • An included angle b is formed between them, and the included angle b ranges from 20° to 90°. This ensures the air intake volume, and the closer the included angle b is to 90°, the greater the air intake volume and the better the heat dissipation effect.
  • the dust-proof structure 590 includes a dust-proof bracket 592 and a dust-proof net 591 .
  • the dust-proof bracket 592 has at least one hollow portion 5920 .
  • the dustproof net 591 is a hollow structure provided on the entire surface. At least one hollow portion 5920 is covered with the dustproof net 591 .
  • the dustproof net 591 is provided with a number of dustproof holes 5911 for airflow to pass through.
  • the dust-proof bracket 592 includes a first dust-proof bracket 5921 and a second dust-proof bracket 5922, and the dust-proof net 591 is sandwiched between the first dust-proof bracket 5921 and the second dust-proof bracket 5922. , and lay each hollow part 5920.
  • the ribs used to form the hollow portion 5920 on the first dust-proof bracket 5921 and the second dust-proof bracket 5922 not only serve to form the hollow portion 5920 and strengthen the dust-proof bracket 592, but also when the dust-proof net 591 is clamped and laid flat on Between the first dust-proof bracket 5921 and the second dust-proof bracket 5922, it is used to flatten the dust-proof net.
  • the first dust-proof bracket 5921 and the second dust-proof bracket 5922 can be fixedly connected by screws or other fixed structures; they can also be integrally formed by injection molding. Specifically, the dust-proof net 591 can be laid flat and injection molded on both sides of the dust-proof net 591 To form an integrated dust-proof bracket 5921.
  • the dust-proof net 591 is provided with a number of dust-proof holes 5911 for air flow to pass through.
  • the maximum aperture of the dust-proof holes 5911 is smaller than the minimum aperture of the air inlet. In this way, large particles of dust can be blocked in the air inlet chamber 100B. external.
  • the air inlet area of the dustproof hole 5911 is 0.008 square millimeters to 0.08 square millimeters.
  • the shape of the dustproof hole 5911 can be circular, square, triangular, or other regular or irregular shapes. Shape, the shape of the dust hole 5911 is not specifically limited here, and is subject to the actual situation. When the shape of the dustproof hole 5911 is circular or square, the aperture or side length of the dustproof hole 5911 is 0.2 mm to 1 mm.

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Abstract

本申请提供一种电池包，该电池包将进风口设置在壳体最靠近壳体的底面的电芯的上表面以下的区域，如此则气流从进风口流入壳体内部后沿着壳体的高度方向流动，之后流入电芯组件内部不仅能够通过流动的空气带走电芯组件在工作时散发的热量。同时，由于进风口位于壳体上最靠近壳体的底面的电芯的上表面以下的区域，则在户外使用电池包进行背负等作业且下雨时，雨水不易从进风口流入电池包内部。而即使雨水从进风口流入电池包内部，雨水也会从最靠近壳体底面的电芯的侧面区域流向电池包的底部，而不会流入电芯组件内部，进而避免了雨水流入电池包内部尤其电芯组件内部而导致的电池包损坏的问题。

Description

电池包 技术领域
本发明涉及电池技术领域，特别涉及一种电池包。
背景技术
电动工具具有环保、清洁且噪音小的优点，因此，电动工具越来越受到动力工具使用者的青睐。电池包通常由电池包壳体和设置在电池包壳体内的多个电芯组成。电动工具在使用过程中，电池包放电会产生大量热量，如果电池包无法及时散热，会降低电池系统充放电循环寿命，影响电池的功率和能量发挥，甚至造成热失控，最终影响电池组的安全性和可靠性。此外，如果电池包的热量过高超过充电最低温度时，还将无法进行充电。
在花园类电动工具例如打草机上使用的电池包通常是背负式的。这类电池包进行散热时，通常是如CN207282574U专利所描述在电池包上设置进风口和出风口，并将多个电芯设置在电池包内部以对电池包进行散热，其中使用者将电池包背负在身上时进风口位于远离人体的壳体上。如此，当使用者在进行背负作业以及将电池包放置在草地上时进风口将裸露在空气中，若遇到下雨天气，则雨水将从该进风口流入电池包内部，尤其进入电芯组件内部，如此将导致电池包内部被雨水侵泡，导致电芯等元器件的损坏。
发明内容
基于此，本申请提供一种电池包，其能够防止雨水从进风口进入电池内部，尤其是防止雨水从进风口进入电芯组件内部，避免电池包损坏。
基于上述目的，本申请提供一种电池包，包括壳体和电芯组件，所述电芯组件包括多个电芯；所述壳体包括前侧壳体和后侧壳体，所述前侧壳体和所述后侧壳体合围形成收容腔，所述电芯组件收容在所述收容腔内，所述壳体还包括底面，所述壳体上开设有进风口和出风口，所述进风口至少部分位于所述壳体上最靠近所述底面的所述电芯的上表面以下的区域。
可选的，所述后侧壳体还包括后表面，所述出风口位于所述后侧壳体上且位于所述后表面内。
可选的，所述壳体包括底部，所述进风口开设在所述壳体的底部。
可选的，所述进风口开设于所述前侧壳体，所述出风口开设于所述后侧壳体。
可选的，将所述壳体沿高度方向划分为上半部壳体和下半部壳体，所述出风口位于所述上半部壳体。
可选的，从所述进风口的流入的气流的气流方向与所述前表面的夹角范围为0°～50°。
可选的，所述电池包能够与背负装置配接，通过背负装置为电动工具供电。
可选的，所述电池包的重量大于等于5kg。
可选的，所述前侧壳体还包括前表面，所述后侧壳体还包括后表面，所述前表面或后表面的面积大于所述底面的面积；
可选的，在所述电池包的高度方向上，所述前侧壳体和所述电芯组件之间形成有第一散热风道，所述后侧壳体和所述电芯组件之间形成有第二散热风道，相邻所述电芯之间形成有第三散热风道，所述第一散热风道和所述第二散热风道通过所述第三散热风道连通，所述进风口和所述第一散热风道连通，所述出风口和所述第二散热风道连通。
可选的，所述前侧壳体的内表面上形成有至少一个阻流部，所述阻流部位于所述第一散热风道内，且朝向所述后表面的方向延伸。
可选的，定义所述电芯组件从上往下依次包括上部、中部和下部，其中位于所述上部和所述下部的电芯数量分别占所述电芯总数量的20％，所述阻流部包括主阻流部，所述主阻流部位于与所述中部正对的所述第一散热风道内。
可选的，所述阻流部包括主阻流部，在气流流动的方向上，所述主阻流部位于温度最高的所述电芯的上表面的下游区域。
可选的，定义所述第一散热风道内垂直于主气流方向的截面为横截面，所述主阻流部的有效阻流面积占所述主阻流部与所述前侧壳体的内表面的交点所在的横截面面积的40％～90％。
可选的，所述阻流部还包括辅阻流部，在气流的流动方向上，所述辅阻流部设置在所述主阻流部的上游区域和/或下游区域。
可选的，当所述辅阻流部设置在所述主阻流部上游区域时，所述辅阻流部的有效阻挡面积小于所述主阻流部的有效阻流面积；和/或，
当所述辅阻流部设置在所述主阻流部下游区域时，所述辅阻流部的有效阻流面积不小于所述主阻流部的有效阻流面积。
可选的，所述后侧壳体的内表面上形成有至少一个阻流部，所述阻流部位于所述第二散热风道内，所述所述阻流部朝向所述前表面延伸。
可选的，所述电池包还包括主控板，所述主控板设置在所述电芯组件的顶部，从所述进风口流入的风流经所述主控板，对所述主控板散热后从所述出风口排出至所述壳体外部。
可选的，所述壳体顶部与所述主控板之间形成有第四散热风道，所述第一散热风道与所述第二散热风道还通过所述第四散热风道连通。
可选的，所述主控板上设有散热片，从所述进风口流入的风流经所述散热片。
可选的，所述前侧壳体包括第一前侧部，以及相对所述第一前侧部靠后的第二前侧部，所述第一前侧部和第二前侧部形成台阶，所述壳体还包括位于所述第一前侧部和第二前侧部之间的连接部，所述进风口至少部分形成于所述连接部。
可选的，在所述壳体的高度方向上，所述第二前侧部至少部分低于所述第一前侧部，流经所述壳体的气流从所述连接部的下方进入所述进风口。
可选的，所述第一前侧部包括下边缘，所述进风口位于所述第一前侧部后方且至少部分高于所述第一前侧部的下边缘，使得至少部分所述进风口于壳体前侧不可见。
可选的，所述进风口至少部分设置于所述第一前侧部和第二前侧部形成的台阶内。
可选的，所述连接部具有弧形部，所述弧形部设置在所述连接部的上侧，所述进风口形成在所述弧形部上。
可选的，所述第一前侧部和所述连接部之间安装有若干加强筋，所述加强筋一端与所述第一前侧部固定连接，另一端与所述连接部固定连接。
可选的，所述电池包还包括防尘结构，所述防尘结构与所述前侧壳体可拆卸连接，并在安装在所述前侧壳体上时盖设在所述第一前侧部和所述第二前侧部之间的区域上，以对穿过所述防尘结构流入所述进风口的气流进行过滤。
可选的，所述防尘结构安装在所述前侧壳体上时与所述第一前侧部之间形成有夹角，所述夹角的角度范围为20°～90°。
可选的，所述防尘结构和所述前侧壳体的其中之一上设置有第一插接件，所述防尘结构与所述前侧壳体的其中另一上设置有与所述第一插接件安装配合的第二插接件。
可选的，所述防尘结构包括防尘支架和防尘网，所述防尘支架具有至少一个镂空部，至少一个所述镂空部铺设有所述防尘网，所述防尘网上设有若干用于气流通过的防尘孔。
可选的，所述防尘支架包括第一防尘支架和第二防尘支架，所述防尘网夹设在所述第一防尘支架和所述第二防尘支架之间。
为解决上述问题，本申请还提供一种电池包，包括：壳体和电芯组件，所述电芯组件包括多个电芯；所述壳体包括前侧壳体和后侧壳体，所述前侧壳体和所述后侧壳体合围形成收容腔，所述电芯组件收容在所述收容腔内，所述壳体开设有进风口和出风口，所述前侧壳体包括第一前侧部，以及相对所述第一前侧部靠后的第二前侧部，所述壳体还包括位于所述第一前侧部和第二前侧部之间的连接部，所述进风口至少部分形成于所述连接部。
可选的，在所述壳体的高度方向上，所述第二前侧部至少部分低于所述第一前侧部，流经所述壳体的气流从所述连接部的下方进入所述进风口。
可选的，所述第一前侧部包括下边缘，所述进风口位于所述第一前侧部后方且至少部分高于所述第一前侧部的下边缘，使得所述至少部分进风口于壳体前侧不可见。
可选的，所述壳体包括底部，所述进风口靠近所述壳体的底部设置。
可选的，所述进风口至少部分设置于所述第一前侧部和第二前侧部形成的台阶内。
为解决上述问题，本申请还提供一种电池包，包括壳体和电芯组件，所述电芯组件包括多个电芯；所述壳体包括前侧壳体和后侧壳体，所述前侧壳体和所述后侧壳体合围形成收容腔，所述电芯组件收容在所述收容腔内，所述壳体开设有进风口和出风口，所述进风口与所述壳体底面之间的距离为：0mm～80mm。
可选的，所述进风口与所述壳体底面之间的距离为：0mm～50mm。
本申请提供的电池包，由于将进风口设置在壳体最靠近壳体的底面的电芯的上表面以下的区域，如此则气流从进风口流入壳体内部后沿着壳体的高度方向流动，之后流入电芯组件内部不仅能够通过流动的空气带走电芯组件在工作时散发的热量。同时，由于进风口位于壳体上最靠近壳体的底面的电芯的上表面以下的区域，则在户外使用电池包且下雨时，雨水不易从进风口流入电池包内部。而即使雨水从进风口流入电池包内部，雨水也会从最靠近壳体底面的电芯的侧面区域流向电池包的底部，而不会流入电芯组件内部，进而避免了雨水流入电池包内部尤其电芯组件内部而导致的电池包损坏的问题。
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的能够实现本发明的具体实施例的详细描述，同时结合附图描述而清楚地获得。附图以及说明书中的相同的标号和符号用于代表相同的或者等同的元件。
图1是本申请提供的背负装置安装电池包为电动工具供电的场景示意图；
图2是本申请提供的充电器上直接插接电池包为电池包充电的场景示意图；
图3是本申请提供的电池包的立体结构示意图；
图4是本申请提供的电池包的立体结构的另一示意图；
图5是本申请提供的电池包的后面结构示意图；
图6是本申请提供的电池包沿上下方向的风道截面结构示意图；
图7是图6中E区域的放大结构示意图；
图8是本申请提供的电池包中主控板、第一采集板和第二采集板于电芯组件的结构示意图；
图9是本申请提供的电池包的壳体爆炸结构示意图；
图10是图9中F区域的放大结构示意图；
图11是本申请提供的电池包的防尘结构移开壳体的立体结构示意图；
图12是图10中G区域的放大结构示意图；
图13是本申请提供的电池包壳体沿宽度方向的截面结构示意图；
具体实施方式
下面结合附图对本发明的较佳实施例进行详细阐述，以使本发明的优点和特征能更易于被本领域技术人员理解，从而对本发明的保护范围做出更为清楚明确的界定，下述实施方式可以适当地彼此结合。其中附图以及说明书中不同实施例中的相同的标号和符号用于代表相同的或者等同的元件。
如图1所示，在本发明的实施例中提供一电池包500，该电池包500安装在电动工具100上给电动工具100进行供电，其中电动工具100可以包括手推割草机、吹风机或打草机等。当电动工具100为吹风机或打草机时，电池包500安装在吹风机或打草机的背负装置300上，为吹风机或打草机供电。此外，由于上述工具在工作时耗电量较大，因此电池包500需要较大的容量。其中，本实施例的电池包500的容量大于0.4kw/h，可以为工作时间长或输出功率大的电动工具供电，例如，电池包500的充电倍率不小于6C，放电倍率不小于4C，充电速度远超目前市场上的电动工具电池包。此外，本实施例中的电池500为背负式电池，所述电池500的重量大于等于5kg。
结合图2至图4所示，在本实施例中，电池包500还包括充放电接口510、锁止部561和位于充放电接口510两侧的滑动导轨570，电池包500通过滑动导轨570与充电器400或背负装置300上对应的滑动导轨滑动连接，使得电池包500滑动可拆卸地与充电器400或背负装置300可拆卸的电连接。其中，当电池包500安装至充电器400或背负装置300上时，锁止部561与充电器400或背负装置300上的锁定件锁紧，以便将电池包500固定在充电器400或背负装置300上，充放电接口510与充电器400或背负装置300建立电连接。继续参图4所示，本实施例提供的电池包500还具有人机交互模块550，人机交互模块550靠近电池包的把手501。人机交互模块550包括多个指示单元和操作按钮，例如蓝牙指示单元、电量指示单元、故障指示单元等，其中指示单元可以是指示灯。电量指示单元用于显示电量，蓝牙指示单元用于显示蓝牙连接状态，故障指示单元用于显示故障状态。按钮用于在按下时显示电池包的电量。
为清楚描述本实施例的电池包500，定义充电器400或背负装置300在电池包500的后方与电池包500滑动可拆卸连接。构件和结构的前，后，左，右，上和下方向都可以基于充电器400或背负装置300相对电池包500的位置。即电池包500安装在充电器400或背负装置300上时，充电器400或背负装置300位于电池包500的后方，则与该后方相对的为前方，定义电池包500滑动插入充电器400或背负装置300的方向为上下方向，电池包500从上方向下方滑动，垂直于该上下方向和前后方向的为左右方向。并定义电池包500滑动方向即上下方向为电池包和电池包500和壳体的高度方向，在电池包500和壳体的高度方向上，壳体具有顶部和与顶部相对的底部。此外，还定义电池包500的前后方向为电池包500的宽度方向，电池包500的左右方向为电池包500的长度 方向。
此外，由于本实施例的电池包500不仅能够安装在电动工具上，同时又能够安装在背负装置上以对电动工具供电，因此本实施例的电池包500需设计较为合适的尺寸以适应不同的应用场景。参图5和图6所示，电池包500的长度L范围为240mm～280mm，宽度W范围为110mm～150mm，高度H范围为280mm～365mm。优选地，电池包500的长度L为260mm，宽度W为132mm，高度H为360mm。
进一步的继续参图6并结合图8至图10所示，电池包500包括壳体，壳体包括前侧壳体502和与前侧壳体502相对的后侧壳体503，前侧壳体502包括前表面，后侧壳体503包括后表面，壳体还包括底面。其中，前侧壳体502包括第一前侧部5021和第二前侧部5022，第一前侧部5021的外表面形成该前表面。此外，在本实施例中定义壳体的底部为第一前侧部5021的下方的区域，在可选的实施例中壳体的底部还可以具体指壳体的底面。此外，在本实施例中，壳体具有把手501，把手501位于壳体顶部，以便用户可以通过握持把手501安装或拿取电池包500。在本实施例中，前侧壳体502和后侧壳体503均包括把手部，前侧壳体502和后侧壳体503卡接后两个把手部形成电池包的把手501。
重点参图8和图9所示，前侧壳体502和后侧壳体503合围形成收容电芯组件520的收容腔100A，电芯组件520收容于壳体的收容腔100A内。此外，在本实施例中，前侧壳体502和后侧壳体503为在前后方向上分开的两个结构，二者通过卡接连接。在其它实施例中，壳体在前后方向上也可以为一体结构，前侧壳体502和后侧壳体503可以指代壳体的前后两部分，并不指前后方向上分为两部分的结构。电池包500的壳体的结构在此不做具体限定，以实际情况为准。电芯组件520包括多个电芯521和用于支撑电芯521的电芯支架522。其中电芯521为片状矩形电芯，例如软包电芯，片状设计可以增大电芯的散热面积，在充放电过程中可以防止电芯内部温度上升；其中片状设计的电芯521可以沿着壳体的高度方向层叠设置，也可以沿着垂直于壳体高度方向即左右或前后方向间隔排布。当然电芯521的形状也可以是圆柱形，圆柱形的电芯521排布在壳体内并支撑在电芯支架522内，多个电芯521的形状和具体排布方式在本实施例中不做具体限定，以实际情况为准。此外，在本实施例中，电芯521支撑在电芯支架522内，在可选的实施例中，还可以不设置电芯支架522，电芯521支撑在壳体上即可。
进一步的，继续参图6并结合图9所示，电池包500还设置有散热结构，该散热结构包括设置在壳体上的进风口505和出风口504。在本实施例中，进风口505开设于前侧壳体502，同时进风口505至少部分位于壳体上最靠近底面的电芯521的上表面以下的区域。具体的，在本实施例中，由于多个电芯521沿着壳体高度方向层叠设置，因此距离底面距离最近的电芯521为最下层电芯521，进风口505至少部分位于壳体上最下层电芯521的上表面以下的区域，且位于壳体的底部。此外，在可选的实施例中，进风口505相对于壳体底部的距离为：0mm～80mm。进一步的，进风口505相对于壳体底部的距离为0mm～50mm。在本实施例中，当进风口505相对于壳体底部的距离为0mm～50mm时，进风口505至少部分位于壳体上最下层电芯521的上表面以下的区域内。此外，进风口505的气流流动方向与前表面之间的夹角范围为0°到50°之间，如此能够减小气流流动的阻力，以提升对电芯组件520的散热效果。当进风口505的气流流动方向与前表面基本平行时，气流沿壳体高度方向流动，如此则气流受到的阻力最小。
此外，在本实施例中，出风口504开设于所述后侧壳体503，将壳体沿高度方向划分为上半部壳体和下半部壳体，出风口504位于上半部壳体。更具体的，出风口504位 置与充放电接口510相邻且靠近电池包500的顶部的位置。当电池包500安装于充电器400上时，充电器400内的风扇启动后形成负压带动气流流动，使得气流从进风口505进入后沿壳体的高度方向流动，并流经电芯组件520的内部给电池包500散热后，从出风口504排出至壳体外部。
本实施例中，由于将进风口505设置在壳体最靠近壳体的底面的电芯521的上表面以下的区域，如此，则气流从进风口505流入壳体内部后沿着壳体的高度方向流动，之后流入电芯组件520内部不仅能够通过流动的空气带走电芯组件520在工作时散发的热量。同时，由于进风口505位于壳体上最靠近壳体的底面的电芯521的上表面以下的区域，则在户外使用电池包500进行例如背负作业或充电等的过程中且下雨时，雨水不易从进风口505流入电池包500内部。而即使雨水从进风口505流入电池包500内部，雨水也会从最靠近壳体底面的电芯521的侧面区域流向电池包500的底部，而不会从最靠近壳体的底面的电芯521和其上方的电芯521之间的间隙流入电芯组件520内部，进而避免了电池包500损坏的问题，同时若电池包500进水，还可以从位于电池包500壳体底部的进风口505进行排水，进一步的避免出现电池包500因为雨水的侵泡而损坏的问题。
进一步的，重点参图6所示，在壳体的高度的方向上，前侧壳体502和电芯组件520之间形成有第一散热风道A，后侧壳体503与电芯组件520之间形成有第二散热风道B。具体的，电芯支架522朝向前表面的表面和前侧壳体502之间形成第一散热风道A，电芯支架522朝向后表面的表面和后侧壳体503之间形成第二散热风道B。此外，当电芯组件520不包括电芯支架522仅包括电芯521，电芯521支撑在壳体上时，该第一散热风道A形成在前侧壳体502和层叠设置的多个电芯521之间，该第二散热风道B形成在后侧壳体503和层叠设置的多个电芯521之间。
此外，结合图8所示，电芯支架522朝向前侧壳体502和后侧壳体503的表面上分别设置有两个间隔设置的定位柱5221，该定位柱5221用于将电芯组件520定位在壳体内，防止电芯组件520在壳体内晃动。位于电芯组件520朝向前侧壳体502的表面上的两个定位柱5221同时限定该第一散热风道A，即，该第一散热风道A由前侧壳体502、电芯支架522朝向前表面的表面以及两个定位柱5221共同限定，具体的，在本实施例中，用于限定第一散热风道A的定位柱5221设置在电芯支架522朝向前表面的表面上。位于电芯组件520朝向后侧壳体503的表面上的两个定位柱5221同时限定该第二散热风道B，即该第二散热风道B由后侧壳体503、电芯支架522朝向后表面的表面以及位于电芯支架522朝向后侧壳体的表面上的两个定位柱5221共同限定，具体的，在本实施例中，用于限定第二散热风道B的定位柱5221设置在电芯支架522朝向后表面的表面上。
进一步的，继续参图6和图8所示，电芯521的数量可以为15个，每个电芯的标称电压为4V，从而电池包500整包的标称电压达到60V，以便支持大功率电动工具工作。此外，电芯521的数量也可以为10个，每个电芯的标称电压为6V，电芯521的数量和每个电芯521的电压在此不做具体限定，以实际情况为准。电池包500内的多个片状电芯521及支撑电芯521的电芯支架522沿电芯厚度方向即电池包的高度方向堆叠设置，且相邻电芯521之间预留有气流间隙，该气流间隙形成第三散热通道C，用于对电芯521散热。该第三散热通道C为多个，该第一散热风道A和第二散热风道B通过第三散热风道C连通，同时进风口505与该第一散热风道A连通，出风口504与第二散热风道B连 通。
进一步地，当电池包500安装至充电器400上时，充电器400上的风扇通常位于电池包500的出风口504处。当风扇启动形成负压带动气流从进风口505流入，气流在第一散热风道A内流动，即从电芯组件520的侧表面流过以对电芯组件520进行散热，且气流在第一气流风道A内流动的同时还从每个相邻电芯521之间的第三散热通道C流过以带走电芯521产生的热量，对电芯521进行散热后流经第二散热风道B之后从出风口504流出至壳体外部。
继续参图8所示，本实施例中，电池包500的充放电控制装置包括主控板541和采集板。采集板用于采集电池包的参数信息，并将参数信息发送至主控板541，主控板541根据电池包的参数信息控制电池包的充放电过程。其中，电池包500的参数信息包括电池包的电压和电池包的温度。在本实施例中，电池包500内每个电芯521的极耳分别位于电芯521两侧，因此采集板包括两个，分别为第一采集板542a和第二采集板542b，第一采集板542a和第二采集板542b分别位于电芯组件520的两侧，第一采集板542a连接多个电芯521的正极，第二采集板542b连接多个电芯521的负极，第一采集板542a通过第一导线(图未示)连接主控板541，第二采集板542b通过第二导线(图未示)连接主控板541，以便将采集到的电池包500的参数信息发送给主控板541。第一采集板542a和第二采集板542b上分别设置有温度采集单元，用于采集电芯的温度。本实施例中，温度采集单元可以是热敏电阻。主控板541与第一采集板542a和第二采集板542b分体设置，且主控板541设置于电芯组件的顶部。
结合图6所示，在本实施例中，主控板541与主控板541相对的壳体之间形成有第四散热通道D。在本实施例中，由于壳体包括前侧壳体502和后侧壳体503，因此第四散热通道D由主控板541和与主控板541相对的前侧壳体502和后侧壳体503的内表面围设而成。风从进风口505流入后不仅经第一散热通道A、第二散热通道B对电芯组件520和第三散热风道C对电芯组件520进行散热，同时风还从第一散热通道A流至电芯组件200的顶部后，再流经第四散热通道D以对主控板541进行散热，如此以带走主控板541上元器件产生的热量。其中第一散热风道A与第二散热风道B还通过第四散热风道D连通，且第四散热风道D通过第二散热风道B与出风口504连通。
进一步地，主控板541上还设置有散热片544，用于对主控板541上的发热器件进行散热。本实施例中，主控板541的散热片544位于第四散热风道D内，当外部装置的风扇开启时，风道内的气流流过散热片544，对散热片544降温，不仅使得电池包500在充放电过程中温升速度降低，确保电池包500在充放电结束后温升未达到温度保护阈值，进而可以不间断使用。同时能够避免主控板541的温度过高而导致主控板541性能变差。
继续参图6所示，气流在气压作用下沿着电池包500的高度方向即第一气流通道A流向出风口504。并且越靠近风扇(出风口504)的地方，压力越强，因此大部分气流均流向靠近出风口504处的电芯，导致远离出风口504的电芯散热不理想，进而使得电芯组件520底部的电芯521温度比顶部的电芯521温度高。
此外，电池包500在充放电过程中，各个不同的电芯521的发热量基本一致，但是当电芯521在上下方向上依次层叠设置时，位于中间位置的电芯521散热条件较差，而位于上下两侧的电芯521散热条件较佳。如此则导致在上下方向上，电池包500的中间部分温度较高而两侧温度较低，因此为提升电池包500内温度的均匀性，使流经温度较高的电芯521的气流量大于流经温度较低的电芯521的气流量，以降低电芯组件520两 端的温差。如图6所示，在电池包500的前侧壳体502的内表面设有至少一个阻流部506，阻流部506位于第一散热风道A内。该阻流部506可以对流经阻流部506的气流的流量进行分配，以使更多的气流流经与温度较高的电芯521相邻的第三散热风道C，如此以通过增大气体流量对温度较高的电芯521进行散热，进而提升电池包500内温度的均匀性。更具体的，在第一前侧部5021的内表面上设置有至少一个阻流部506，阻流部506朝向后表面的方向延伸。其中，阻流部506可以为矩形板状结构、圆柱体、凸台等，阻流筋506的具体结构在此不做具体限定，以实际需求为准。此外，在本实施例中，阻流部506不仅能够起到阻流作用，同时还能够起到支撑作用。
进一步的，继续参图6所示，该至少一个阻流部506包括主阻流部5061，在电池包500的上下方向上，主阻流部5061设置在温度最高的电芯521的下表面以上的区域，其中，温度最高的电芯521的下表面指的是温度最高的电芯521朝向电池包500底面的表面。此外，由于风从进风口505流入第一散热风道A内后从下往上流动，则在气流的流动方向上，主阻流部5061设置在温度最高的电芯521的上表面的下游区域内。在气流的流动方向上，温度最高的电芯521的上表面即温度最高的电芯521朝向电池包500的底面的表面。通过上述主阻流筋5061的设置，能够提升流经温度最高的电芯521的气流，进而降低温度最高的电芯521的温度，提升电池包500内温度的均匀性。
此外，在本实施例中，定义电芯组件520从上往下依次包括上部、中部和下部。经技术人员研究发现，当位于上部和下部的电芯521的数量分别占电芯总数量的20％时，将主阻流筋5061设置在电芯组件520的的中部正对的第一散热风道A内时阻流效果较佳。在本实施例中，定义中部具有上边界和下边界，则主阻流筋5061设置在电芯组件520的中部正对的第一散热风道A内可以理解为，主流筋5061设置在夹持在上边界和下边界之间第一散热风道A内。例如，当电芯521的数量为15节时，则上部为从最顶层电芯521开始往下计数至第3节电芯521的区域，下部为从最底层电芯521开始往上计数至第3节电芯521的区域，即中部指电芯组件520中上部第3节电芯的下边界和下部第3节电芯的上边界之间的部分。如此，主阻流筋561设置在上部第3节电芯的下边界和下部第3节电芯的上边界之间的第一散热风道A内。
继续参图6和图7所示，定义第一散热风道A内垂直于主气流方向的截面为横截面，经技术人员研究发现，主阻流部5061的有效阻流面积占主阻流部5061与前侧壳体502的内表面的交点a所在的横截面b面积的40％～90％时，既能保证对温度最高的电芯521的散热且又能够保证对位于主阻流部5061上方的电芯521的散热。其中，有效阻流面积指的是：主阻流部5061在主阻流部5061与前侧壳体502的内表面的交点a所在的横截面b上的投影面积。在本实施例中，由于第一散热风道A和主阻流筋5061均为长方体结构，且第一散热风道A沿上下方向设置，以及主阻流部5061沿前后方向延伸。此时，当阻流部5061的延伸高度占第一散热风道A在前后方向上的宽度d的
40％～90％时，既能保证对温度最高的电芯521的散热且又能够保证对位于主阻流部5061上方的电芯521的散热。
此外，在本实施例中，主阻流部5061为完整的长方体板状结构，在可选的实施例中，主阻流部5061还可以设置为梳状结构，或者在板状结构上设置孔洞，或在朝向电芯521的一侧设置凹槽，较佳的该凹槽设置在前后方向的中间位置。主阻流部5061的形状在此不做具体限定，只需使得主阻流部5061的有效阻流面积占主阻流部5061与前侧壳体502的内表面的交点a所在的横截面b面积的40％～90％即可。
继续参图6和图7所示，为进一步提升电池包500内温度的均匀性，还可以设置辅阻流部5062。具体的，在气流流动的方向上，辅阻流部5062可以设置在主阻流部5061的上流区域，也可以设置在主阻流部5061的下游区域。当辅阻流部5062设置在主阻流部5061的上游区域时，辅阻流部5061的有效阻流面积小于主阻流部5061的有效阻流面积。具体的，当辅阻流部5062设置在主阻流部5061的上游区域且数量为两个以上时，辅阻流部5061的有效阻流面积在气流的流动方向上依次增大。如此能够进一步的提升对位于主阻流部5061上游的电芯521的散热效果，
而由于阻流部506越靠近电池包500的顶部，则该阻流部506上方的电芯521数量越少，而电芯521的数量越少，所需要的冷却风量越少，如此理论上讲为保证电池包500内温度的均匀性，阻流部506的有效阻流面积应当在从下往上，即远离进风口505的方向上依次增大。但经技术人员基于上述理论研究通过实验验证发现，当辅阻流部5061设置在主阻流部5061下游区域时，部分辅阻流部5062的有效阻流面积相同时，仍能满足电池包500内温度均匀性的要求。即当辅阻流部5062设置在主阻流部5061下游时，辅阻流部5062的有效阻流面积不小于主阻流部5061的有效阻流面积即可。较佳的，当辅阻流部5062设置在主阻流部5061下游且数量两个以上时，辅阻流部5062的有效阻流面积在气流的流动方向上依次增大。如此能够进一步的提升对位于主阻流部5061下游的电芯521的散热效果，进而更进一步的均衡电池包500内的温度。
进一步的，在本实施例中，辅阻流部5062的形状为完整板状结构，在可选的实施例中，辅阻流部5062的形状还可以为梳状或在板状结构上设置孔洞，或在朝向电芯521的一侧设置凹槽，较佳的该凹槽设置在前后方向的中间位置。辅阻流部5062的形状在此不做具体限定，只需辅阻流部5062的有效阻流面积达到要求即可。
在本实施例中，阻流部506设置在第一散热风道A内，在可选的实施例中，阻流部还可以设置在第二散热风道B内，或者在第一散热风道A和第二散热风道B内均设置阻流部。当阻流部设置在第二散热风道B内时，阻流部设置在后侧壳体的内表面，且朝向前表面的方向延伸。此外，阻流部的具体位置、大小及形状等在此不做具体限定，以实际情况为准。
进一步的，参图9至图12所示，在本实施例中，壳体还包括位于第一前侧部5021和第二前侧部5022之间的连接部5023，进风口505至少部分形成于连接部5023。形成有进风口505的连接部5023设置在第一前侧部5021和第二前侧部5022之间，如此则使得进风口505能够被隐藏在第一前侧部5021和第二前侧部5022之间，形成隐藏式结构，能够防止雨水从进风口505流入电池包500内部，同时结构美观。此外，在本实施例中，第一前侧部5021和连接部5023之间形成有进风腔100B。气流流入进风腔100B后从进风口505流入壳体内部。
此外，重点参图10所示，第一前侧部5021和第二前侧部5022形成有台阶502A。进风口505至少部分设置于第一前侧部5021和第二前侧部5022形成的台阶502A内，即进风口505位于第一前侧部5021和第二前侧部5022之间且从前方看不可见的区域内。如此，则使进风口505被隐藏，以更进一步的避免雨水进入。
继续参图9至图12所示，在壳体的高度方向上，第二前侧部5022至少部分低于第一前侧部5021，流经壳体的气流从连接部5023的下方进入进风口505。此外，第一前侧部5021包括下边缘，进风口505位于第一前侧部5021后方且至少部分高于第一前侧部5021的下边缘，进而使得至少部分进风口505于壳体前侧不可见，如此以将进风口505 隐藏在第一前侧部5021的后方。
进一步的，重点参图11和12所示，在本实施例中，连接部5023具有弧形部5023A，弧形部5023A形成在连接部5023的上侧，弧形部5023A上形成有进风口505，进风口505包括多个进风孔5051，其中，为了防止外界的灰尘或异物通过较大面积的进风孔5051进入至电池包500内部，从而对电池包500内的元件产生影响。将进风孔5051的数量设置为若干个且每个进风孔5051的尺寸较小，即能保证通风面积，也能形成过滤结构从而减少外界灰尘或异物进入电池包500内部。在本实施例中，进风孔5051的进风面积为3平方毫米到20平方毫米，需要说明的是，进风孔5051的形状可以为圆形、方形、三角形以及其它的规则或不规则的形状，进风孔5051的形状在此不做具体限定，以实际情况为准。当进风孔的形状为圆形时，进风孔5051的孔径为2mm～5mm。由于连接部5023形成有进风口505的部分弧形设计，如此则在有限空间内形成有进风口505的连接部5023的面积增大，进而可以增大进风孔5051的数量，如此以提升进风量。较佳的，在本实施例中，该弧形部5023A为球形。
进一步的，重点参图12所示，由于连接部5023的弧形部5023A上设有多个进风孔5051，将导致连接部5023的强度降低，为提升连接部5023的强度，故在第一前侧部5021和连接部5023之间安装有若干加强筋5024，加强筋5024一端与第一前侧部5021固定连接，另一端与连接部5023固定连接。此外，该加强筋5024还可以支撑第一前侧部5021和连接部5023以提升二者的安装强度。在本实施例中，该加强筋5024的数量为多个，多个加强筋5024间隔设置。
此外，结合图9所示，由于气流会带有灰尘，因此气流流入电池包500内部时，会导致灰尘在壳体内堆积，不仅影响散热效率，同时还将会导致电池包内电芯等元器件损坏。因此本实施例的电池包500还包括防尘结构590，防尘结构590位于前侧壳体502的外侧且位于流经进风口505的气流路径上。具体的，防尘结构590与前侧壳体502底部可拆卸连接，并在安装在前侧壳体502上时盖设在第一前侧部5021和第二前侧部5022之间的区域上，以对穿过防尘结构590流入进风口505的气流进行过滤，以防止外界的灰尘或异物进入至电池包500内，从而避免对电池包500内的元件产生影响。此外，由于多个进风孔5051构成过滤结构，则气流流经防尘结构590和过滤结构后会进行两次过滤，如此以进一步的提升防尘效果。
继续参图11所示，防尘结构590和前侧壳体502的其中之一上设置有第一插接件5025，防尘结构590与前侧壳体502底部的其中另一上设置有与第一插接5025件安装配合的第二插接件593。该第一插接件5025和第二插接件593中的一个为安装孔，第一插接件5025和第二插接件593中的另一个为与安装孔插接配合的安装柱。第一插接件5025和第二插接件593的配合实现防尘结构590从前侧壳体502上能够轻松拆卸或安装。当需要对防尘结构590进行清洗或更换时，将防尘结构590从前侧壳体502上拆卸下来即可进行清洗或更换，操作方便。
具体的，如图11所示，在本实施例中，第一插接件5025为安装孔，该安装孔设置在进风腔100B两侧的安装座上，第二插接件593为安装柱，将安装柱插入安装孔后可将防尘结构590安装在前侧壳体502的底部，将安装柱拔出安装孔后则可将防尘结构590从前侧壳体502上拆除。此外，在本实施例中，该安装孔设置在进风腔100B两侧的安装部上，为提升安装可靠性，还在加强筋5024上设有该安装孔，安装柱设置在防尘结构590对应的位置。
此外，在本实施例中，第一插接件5025和第二插接件593的数量为多个，以保证防尘结构590安装在前侧壳体502上的稳定性，关于第一插接件5025和第二插接件593的具体数量根据实际需要进行设置即可，比如，三个、四个、五个、六个等。在其他实施例中，第一插接件5025和第二插接件593还可为其他配合的结构，在此不做具体限定，比如配合的磁性件和磁铁，配合的卡扣和卡持件等。
结合图13所示，本实施例中，将防尘结构590安装在前侧壳体502上时，该防尘结构590盖设在进风腔100B上，且该防尘结构590与后表面之间形成有夹角b，夹角b的角度范围为20°～90°。如此以保证进风量，且当夹角b的角度越近90°进气量越大，散热效果越好。
进一步的，结合图9所示，防尘结构590包括防尘支架592和防尘网591，防尘支架592具有至少一个镂空部5920。防尘网591为整面设置的镂空结构，至少一个镂空部5920铺设有防尘网591，防尘网591上设有若干用于气流通过的防尘孔5911。
此外，在本实施例中，防尘支架592包括第一防尘支架5921和第二防尘支架5922，防尘网591夹持并在第一防尘支架5921和第二防尘支架5922之间，并铺设每个镂空部5920。第一防尘支架5921和第二防尘支架5922上用于形成镂空部5920的肋不仅起到形成镂空部5920和加强防尘支架592的作用，同时当防尘网591夹持并平铺在第一防尘支架5921和第二防尘支架5922之间时，用于使防尘网平整化。第一防尘支架5921和第二防尘支架5922可通过螺丝或螺钉等固定结构固定连接；也可以通过注塑一体成型，具体的，可以平铺防尘网591在防尘网591两侧进行注塑以形成一体成型的防尘支架5921。
此外，防尘网591上设有若干用于气流通过的防尘孔5911，防尘孔5911的最大孔径小于所述进风口的最小孔径，如此，则可将大颗粒灰尘阻挡在进风腔100B外部。在本实施例中，防尘孔5911的进风面积为0.008平方毫米到0.08平方毫米，需要说明的是，防尘孔5911的形状可以为圆形、方形、三角形以及其它的规则或不规则的形状，防尘孔5911的形状在此不做具体限定，以实际情况为准。当防尘孔5911的形状为圆形或正方形时，防尘孔5911的孔径或边长为0.2mm～1mm。
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本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。
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本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。

Claims (20)

  1. 一种电池包，包括：
    电芯组件，所述电芯组件包括多个电芯；
    壳体，所述壳体包括前侧壳体和后侧壳体，所述前侧壳体和所述后侧壳体合围形成收容所述电芯组件的收容腔；所述壳体还包括底面；所述壳体上开设有进风口和出风口；其特征在于，
    所述进风口至少部分位于所述壳体上最靠近所述底面的所述电芯的上表面以下的区域内。
  2. 根据权利要求1所述的电池包，其特征在于，所述后侧壳体还包括后表面，所述出风口位于所述后侧壳体上且位于所述后表面内。
  3. 根据权利要求1所述的电池包，其特征在于，将所述壳体沿高度方向划分为上半部壳体和下半部壳体，所述出风口位于所述上半部壳体。
  4. 根据权利要求1所述的电池包，其特征在于，所述前侧壳体还包括前表面，从所述进风口流入的气流的气流方向与所述前表面的夹角范围为0°～50°。
  5. 根据权利要求1所述的电池包，其特征在于，在所述电池包的高度方向上，所述电芯层叠设置，且所述前侧壳体和所述电芯组件之间形成有第一散热风道，所述后侧壳体和所述电芯组件之间形成有第二散热风道，相邻所述电芯之间形成有第三散热风道，所述第一散热风道和所述第二散热风道通过所述第三散热风道连通，所述进风口和所述第一散热风道连通，所述出风口和所述第二散热风道连通。
  6. 根据权利要求5所述的电池包，其特征在于，所述前侧壳体的内表面上形成有至少一个阻流部，所述阻流部位于所述第一散热风道内，且朝向所述后表面的方向延伸。
  7. 根据权利要求6所述的电池包，其特征在于，定义所述电芯组件从上往下依次包括上部、中部和下部，其中位于所述上部和所述下部的电芯数量分别占所述电芯总数量的20％，所述阻流部包括主阻流部，所述主阻流部位于与所述中部正对的所述第一散热风道内。
  8. 根据权利要求6所述的电池包，其特征在于，所述阻流部包括主阻流部，在气流流动的方向上，所述主阻流部位于温度最高的所述电芯的上表面的下游区域。
  9. 根据权利要求7或8所述的电池包，其特征在于，定义所述第一散热风道内垂直于主气流方向的截面为横截面，所述主阻流部的有效阻流面积占所述主阻流部与所述前侧壳体的内表面的交点所在的横截面面积的40％～90％。
  10. 根据权利要求7或8所述的电池包，其特征在于，所述阻流部还包括辅阻流部，在气流的流动方向上，所述辅阻流部设置在所述主阻流部的上游区域和/或下游区域。
  11. 根据权利要求10所述的电池包，其特征在于，当所述辅阻流部设置在所述主阻流部上游区域时，所述辅阻流部的有效阻挡面积小于所述主阻流部的有效阻流面积；和/或，
    当所述辅阻流部设置在所述主阻流部下游区域时，所述辅阻流部的有效阻流面积不小于所述主阻流部的有效阻流面积。
  12. 根据权利要求1所述的电池包，其特征在于，所述前侧壳体包括第一前侧部，以及相对所述第一前侧部靠后的第二前侧部，所述第一前侧部和所述第二前侧部形成台阶，所述壳体还包括位于所述第一前侧部和所述第二前侧部之间的连接部，所述进风口 至少部分形成于所述连接部。
  13. 根据权利要求12所述的电池包，其特征在于，在所述壳体的高度方向上，所述第二前侧部至少部分低于所述第一前侧部，流经所述壳体的气流从所述连接部的下方进入所述进风口。
  14. 根据权利要求12所述的电池包，其特征在于，所述第一前侧部包括下边缘，所述进风口位于所述第一前侧部后方且至少部分高于所述第一前侧部的下边缘，使得至少部分所述进风口于壳体前侧不可见。
  15. 根据权利要求12所述的电池包，其特征在于，所述连接部具有弧形部，所述弧形部设置在所述连接部的上侧，所述进风口形成在所述弧形部上。
  16. 根据权利要求12所述的电池包，其特征在于，所述电池包还包括防尘结构，所述防尘结构与所述前侧壳体可拆卸连接，并在安装在所述前侧壳体上时盖设在所述第一前侧部和所述第二前侧部之间的区域上，以对穿过所述防尘结构流入所述进风口的气流进行过滤。
  17. 根据权利要求16所述的电池包，其特征在于，所述防尘结构安装在所述前侧壳体上时与所述第一前侧部之间形成有夹角，所述夹角的角度范围为20°～90°。
  18. 根据权利要求1所述的电池包，其特征在于，所述电池包的重量大于等于5kg。
  19. 一种电池包，包括：
    电芯组件，所述电芯组件包括多个电芯；
    壳体，所述壳体包括前侧壳体和后侧壳体，所述前侧壳体和后侧壳体合围形成收容所述电芯组件的收容腔；所述壳体开设有进风口和出风口；其特征在于，
    所述前侧壳体包括第一前侧部，以及相对所述第一前侧部靠后的第二前侧部，所述壳体还包括位于所述第一前侧部和第二前侧部之间的连接部，所述进风口至少部分形成于所述连接部。
  20. 一种电池包，包括：
    电芯组件，所述电芯组件包括多个电芯；
    壳体，所述壳体包括前侧壳体和后侧壳体，所述前侧壳体和后侧壳体合围形成收容所述电芯组件的收容腔；所述壳体还包括底面；所述壳体开设有进风口和出风口；其特征在于，
    所述进风口与所述壳体底面之间的距离为：0mm～80mm。
PCT/CN2023/091600 2022-04-28 2023-04-28 电池包 WO2023208196A1 (zh)

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