WO2022218051A1 - 电池包及电动工具 - Google Patents

电池包及电动工具 Download PDF

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Publication number
WO2022218051A1
WO2022218051A1 PCT/CN2022/078981 CN2022078981W WO2022218051A1 WO 2022218051 A1 WO2022218051 A1 WO 2022218051A1 CN 2022078981 W CN2022078981 W CN 2022078981W WO 2022218051 A1 WO2022218051 A1 WO 2022218051A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery pack
terminal
cell assembly
ventilating
assembly
Prior art date
Application number
PCT/CN2022/078981
Other languages
English (en)
French (fr)
Inventor
胡桂伍
杨东
公彬彬
杨德中
段俊雅
Original Assignee
南京泉峰科技有限公司
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
Priority claimed from CN202110403306.1A external-priority patent/CN115224428B/zh
Priority claimed from CN202110403389.4A external-priority patent/CN115224455B/zh
Priority claimed from CN202110403460.9A external-priority patent/CN115224456A/zh
Priority claimed from CN202110519193.1A external-priority patent/CN115347314A/zh
Priority claimed from CN202110517154.8A external-priority patent/CN115347313A/zh
Application filed by 南京泉峰科技有限公司 filed Critical 南京泉峰科技有限公司
Priority to EP22787281.9A priority Critical patent/EP4290662A1/en
Priority to AU2022256560A priority patent/AU2022256560A1/en
Publication of WO2022218051A1 publication Critical patent/WO2022218051A1/zh
Priority to US18/465,649 priority patent/US20230420789A1/en

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Classifications

    • 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
    • H01M50/289—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
    • H01M50/291—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 characterised by their shape
    • 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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • 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
    • 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
    • H01M50/204—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
    • H01M50/233—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
    • H01M50/247—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
    • H01M50/289—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
    • H01M50/293—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 characterised by the material
    • 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 application relates to a battery pack, for example, a battery pack suitable for power tools.
  • the present application provides a battery pack suitable for electric tools, which makes the structure of the battery pack simpler, the cost is lower, the weight of the whole pack is reduced, and the air pressure inside and outside the battery pack can be balanced.
  • a battery pack configured to supply power to an electric tool, the battery pack comprising: a casing; a cell assembly, which is arranged in the casing, the cell assembly comprising a plurality of cell units arranged in layers; an elastic pad , the elastic pads are respectively arranged between the adjacent battery core units; an air cavity is formed between the elastic pads and the adjacent battery core units; the sealing member is arranged at least on the battery core components The surface of the sealing member and the casing form a sealed cavity; the ventilation element is partially arranged on the side of the battery core assembly and extends into the plurality of air cavities along the first direction; the ventilation element is connected to the air cavity. Air communication outside the sealed cavity.
  • the ventilating element includes a ventilating body and a plurality of ventilating pin ends, and the plurality of ventilating pin ends are connected to the ventilating body.
  • the ventilating main body is disposed on the side of the battery core assembly, and at least part of the ventilating pin end is located in the air cavity.
  • the upper surface of the breathable body is higher than the upper surface of the sealing member.
  • the upper surface of the breathable body is flush with the upper surface of the sealing member.
  • a groove is formed on the upper surface of the sealing member, and the upper surface of the breathable main body is flush with the upper surface of the sealing member where the groove is located.
  • the ventilation element is made of waterproof and breathable material.
  • the thickness of the ventilation element is greater than 0.3 mm and less than 4 mm.
  • the elastic pad is provided as a material whose deformation is reversible.
  • the elastic pad is configured as a thermally conductive material or includes a thermally conductive component.
  • an opening is formed on a side of the elastic pad close to the ventilation element, and the air in the opening communicates with the air in the air cavity.
  • the casing includes an upper casing and a lower casing, the sealing member and the lower casing form the sealed cavity, and the cell assembly is arranged in the sealed cavity.
  • a separation rib is formed on the inner surface of the lower casing, and the separation rib divides the sealing cavity into a first part, a second part and a middle part.
  • first part is located on the side of the sealed cavity close to the rear end of the cell assembly
  • second part is located on the side of the sealed cavity close to the front end of the cell assembly.
  • the middle portion is disposed opposite to the plurality of air cavities in the up-down direction.
  • a battery pack configured to supply power to an electric tool, the battery pack comprising: a casing; a cell assembly, which is arranged in the casing, the cell assembly comprising a plurality of cell units arranged in layers; an elastic pad , the elastic pads are respectively arranged between the adjacent battery core units; an air cavity is formed between the elastic pads and the adjacent battery core units; the sealing member is arranged at least on the battery core components
  • the surface of the sealing member and the casing form a sealing cavity; a ventilation element communicates with the air cavity; the ventilation element communicates with the air outside the sealing cavity.
  • the ventilating element includes a ventilating body and a plurality of ventilating pin ends, and the plurality of ventilating pin ends are connected to the ventilating body.
  • An electric power tool comprising a battery pack for supplying power to the electric power tool, the battery pack comprising: a casing; a battery cell assembly, which is arranged in the casing, and the battery core assembly includes a plurality of stacked arrangement an elastic pad, the elastic pads are respectively arranged between the adjacent battery cells; an air cavity is formed between the elastic pad and the adjacent battery cells; a sealing member, at least The air-permeable element is arranged on the surface of the cell assembly, and the seal and the casing form a sealed cavity; the ventilation element is partially disposed on the side of the cell assembly and extends to a plurality of the air cavities along the first direction inside; the breathable element communicates with the air outside the sealed cavity.
  • the ventilating element includes a ventilating body and a plurality of ventilating pin ends, and the plurality of ventilating pin ends are connected to the ventilating body.
  • the ventilating main body is disposed on the side of the battery core assembly, and at least part of the ventilating pin end is located in the air cavity.
  • a battery pack configured to supply power to an electric tool, the battery pack comprising: a casing; a cell assembly located in the casing, the cell assembly comprising a positive terminal of the cell assembly and a negative terminal of the cell assembly; a battery a pack interface, arranged on the surface of the casing; a battery pack terminal, located in the battery pack interface, the battery pack terminal includes a battery pack charging terminal and a battery pack discharging terminal; the battery pack charging terminal passes through the battery pack
  • the charging path of the battery pack is electrically connected to the positive terminal of the battery cell assembly or the negative terminal of the battery core assembly; the discharge terminal of the battery pack is connected to the positive terminal of the battery core assembly or the negative electrode terminal of the battery pack through the discharge path of the battery pack.
  • the negative terminal of the core assembly is electrically connected; the protection element is arranged in the charging path and the discharging path at the same time.
  • the battery pack further includes a charging connecting piece and a discharging connecting piece, the charging connecting piece is arranged in the charging path, and the discharging connecting piece is arranged in the discharging path.
  • the charging connecting piece is electrically connected to the charging terminal of the battery pack through a circuit board.
  • the discharge connecting piece is electrically connected to the discharge terminal of the battery pack.
  • the front end of the protection element is configured to be electrically connected to the positive terminal of the cell assembly or the negative terminal of the cell assembly.
  • the rear end of the protection element is electrically connected to the charging connection piece.
  • the rear end of the protection element and the charging connecting piece are electrically connected by wires.
  • the protection element is set as one of fuses such as a blade fuse, a wrap fuse, and a patch fuse.
  • the charging connecting piece and the discharging connecting piece are made of conductive material.
  • the cell assembly includes a plurality of cell units.
  • the charging path is different from the discharging path.
  • a battery pack configured to supply power to an electric tool
  • the battery pack comprising: a casing, including an upper casing and a lower casing; a battery core assembly, arranged in the casing; a support plate, arranged on the upper casing between the body and the lower casing; a circuit board, fixed on the upper surface of the support plate; a terminal assembly, partially fixed on the upper surface of the support plate, the terminal assembly includes: a plurality of battery pack terminals, all of which are
  • the battery pack terminal includes a terminal clamping part and a terminal pole piece; a terminal support base is used to fix the battery pack terminal; the terminal assembly further includes a terminal protection device, fixed on the terminal support base, the terminal protection The device is formed with a plurality of accommodating spaces, and the plurality of accommodating spaces are independent of each other.
  • a plurality of the battery pack terminals are respectively located in the plurality of the accommodating spaces.
  • a gap is provided between the inner surface of the accommodating space and the terminal clamping portion.
  • the gap can be adapted to undergo reversible elastic deformation of the terminal clamping portion.
  • the terminal protection device is formed with a straight groove extending in the front-rear direction, and the straight groove is disposed opposite to the terminal clamping portion in the up-down direction.
  • terminal pole piece and the circuit board are electrically connected through wires.
  • the terminal protection device is made of plastic material
  • the terminal protection device is made of insulating material.
  • the cell assembly includes a plurality of cell units.
  • a battery pack configured to supply power to an electric tool, the battery pack comprising: a casing; an electric core assembly, which is arranged in the casing, the electric core assembly comprising a plurality of stacked electric core units; an elastic assembly , the elastic component includes a plurality of elastic pads, and the plurality of the elastic pads are respectively arranged between the adjacent battery core units; a plurality of the elastic pads and the adjacent battery core units are formed with a plurality of elastic pads an air cavity; a sealing member, disposed at least on the surface of the battery core assembly, the sealing member and the casing form a sealing cavity; a ventilation device, partially disposed on the side of the battery core assembly; the ventilation device includes A first element, a second element and a connecting piece, the first element and the second element are fixed by a connecting piece; the connecting piece is connected or formed with a ventilation channel; the ventilation channel is connected with a plurality of the air The cavity is communicated; the ventilation channel is communicated with the air outside the sealed cavity.
  • the first element part is disposed on the side surface of the cell assembly.
  • the elastic pad is provided as a material whose deformation is reversible.
  • the elastic pad is configured as a thermally conductive material or includes a thermally conductive component.
  • the cell assembly is arranged in the sealed cavity.
  • the sealing member is formed by a gluing process.
  • the second element is set to be made of PC material.
  • the thickness range of the connecting piece is set to be greater than or equal to 0.05 mm and less than or equal to 1 mm.
  • the connector is configured as a back glue.
  • a battery pack configured to supply power to an electric tool, the battery pack comprising: a casing; a cell assembly, which is arranged in the casing, the cell assembly including a plurality of stacked cell units; a deformation assembly , the deformation component includes a plurality of deformation elements, and the plurality of deformation elements are respectively arranged between the adjacent cell units; a plurality of the deformation elements and the adjacent cell units are formed with a plurality of an air cavity; a sealing member, at least disposed on the surface of the cell assembly, the sealing member and the casing form a sealed cavity; a ventilation device, partially disposed on the side of the cell assembly; the ventilation device at least It includes a first element and a second element, the first element and the second element are fixed by connecting pieces; at least one ventilation channel is formed or connected on the first element or the second element; the The ventilation channel communicates with the plurality of air cavities or communicates with the plurality of air cavities through the deformation component; the ventilation channel communicates with the air outside the sealing cavity.
  • the first element part is disposed on the side surface of the cell assembly.
  • the deformation of the deformation element is configured to fit the air cavity.
  • the deformation element is configured as a thermally conductive material or includes a thermally conductive component.
  • the deformation element is configured as a breathable material.
  • the cell assembly is arranged in the sealed cavity.
  • the sealing member is formed by a gluing process.
  • the first element is set to be MPP material.
  • the second element is set to be made of PC material.
  • FIG. 1 is a structural diagram of an electric tool as a specific embodiment
  • Figure 2 is a structural diagram of a battery pack
  • Fig. 3 is an exploded view of the battery pack in Fig. 2;
  • Fig. 4 is a partial structure exploded view of the battery pack in Fig. 2;
  • FIG. 5 is a structural diagram of the battery pack terminal in FIG. 2;
  • FIG. 6 is a structural diagram of a terminal protection device of the battery pack in FIG. 2;
  • FIG. 7 is a structural diagram of a protection element of the battery pack in FIG. 2;
  • FIG. 8 is another perspective structural diagram of the protection element of the battery pack in FIG. 2;
  • Figure 9 is a schematic diagram of the charging path and the discharging path of the battery pack.
  • FIG. 10 is a schematic diagram of a charging path and a discharging path of another embodiment of a battery pack
  • Figure 11 is a partial exploded view of the battery pack in Figure 2;
  • Figure 12 is a structural diagram of a ventilation element
  • Figure 13 is a structural diagram of the ventilation element and the battery core assembly
  • Figure 14 is a structural diagram of the ventilation element and the seal
  • Figure 15 is a sectional view of Figure 14;
  • Figure 16 is a partial enlarged view at A in Figure 15;
  • Figure 17 is a partial enlarged view corresponding to A in another embodiment
  • Fig. 18 is a partial enlarged view corresponding to A in another embodiment
  • Figure 19 is a structural diagram of an elastic pad in another embodiment
  • FIG. 20 is a structural diagram of a separation rib position in another embodiment
  • 21 is an exploded view of the structure of a battery pack according to another embodiment
  • FIG. 22 is a structural diagram of a cell assembly and a deformation assembly of the battery pack in FIG. 21;
  • Figure 23 is a structural diagram of the cell assembly and the ventilation device
  • Figure 24 is a partial enlarged view at A in Figure 23;
  • Figure 25 is an exploded view of one embodiment of a venting device
  • Figure 26 is a diagram of the air circulation path in the battery pack
  • Figure 27 is a structural diagram of another embodiment of the deformation assembly.
  • Figure 28 is a partial structural diagram of a ventilation device as another embodiment
  • Figure 29 is an exploded view of the structure of the ventilation device in Figure 28;
  • Figure 30 is a partial structural diagram of a ventilation device as another embodiment
  • Figure 31 is a structural exploded view of the ventilation device in Figure 30;
  • Figure 32 is a partial structural diagram of a ventilation device as another embodiment
  • FIG. 33 is an exploded view of the structure of the ventilation device in FIG. 32 .
  • FIG. 1 shows a power tool 2 and a battery pack 1 that can be adapted to the power tool 2 and supply power to the power tool 2 .
  • the power tool 2 is an electric drill, but it should be understood that it can also be applied to hand-held electric tools such as electric wrenches, electric screwdrivers, electric hammer drills, electric circular saws, sanders, etc., and table-type electric power tools such as table saws.
  • Tools and outdoor tools such as lawn mowers, lawn trimmers, electric scissors, pruning machines, chainsaws, etc. Obviously, the following embodiments are part of the embodiments of the present application, but not all of the embodiments.
  • the battery pack 1 at least includes a casing 11 , a cell assembly 12 and a sealing member 13 .
  • the housing 11 includes an upper housing 111 and a lower housing 112 assembled at an interface to form an inner cavity 113 .
  • the cell assembly 12 is disposed in the inner cavity 113 formed by the casing 11 .
  • the cell assembly 12 further includes a positive terminal 122 of the cell assembly and a negative terminal 123 of the cell assembly, which are used for outputting electrical energy of the cell assembly 12 or inputting electrical energy to charge the cell assembly 12 .
  • the battery pack 1 further includes a battery pack interface 16 , which is at least electrically connected to the battery cell assembly 12 .
  • the battery pack interface 16 is formed on the upper surface of the upper case 111 .
  • the battery pack 1 further includes a support plate 17 , a main circuit board 18 and a terminal assembly 19 .
  • the support plate 17 is disposed above the lower case 112 , and the support plate 17 and the lower case 112 form an inner cavity 113 for accommodating the cell assembly 12 .
  • the support plate 17 and the upper casing 111 also form an accommodating space (not shown) for accommodating the main circuit board 18, the terminal assembly 19 and other components.
  • the support plate 17 has a flat plate-like structure, and the support plate 17 is detachably connected to the lower casing 112 .
  • the terminal assembly 19 includes a battery pack charging terminal 191 , a battery pack negative terminal 192 , a battery pack communication terminal 193 , a battery pack discharge terminal 194 and a terminal support base 195 .
  • the terminal support base 195 is used for fixing the battery pack charging terminal 191 , the battery pack negative terminal 192 , the battery pack communication terminal 193 and the battery pack discharge terminal 194 to the support plate 17 .
  • the battery pack charging terminal 191 is electrically connected to the positive terminal 122 of the cell assembly, and the battery pack charging terminal 191 is located in the battery pack interface 16 .
  • the negative terminal 192 of the battery pack is electrically connected to the negative terminal 123 of the cell assembly, and the negative terminal 192 of the battery pack is located in the battery pack interface 16 .
  • the battery pack charging terminal 191 and the battery pack negative terminal 193 are configured to cooperate with the positive terminal (not shown) of the charger and the negative terminal (not shown) of the charger to input power to the battery pack 1 .
  • the charger further includes a charger communication terminal (not shown) through which the charger is connected to the battery pack communication terminal 193 to communicate with the battery pack 1 .
  • the charger converts alternating current into direct current for output, and the electrical energy passes through the positive terminal of the charger, the charging terminal 191 of the battery pack, the positive terminal 122 of the cell assembly, the negative terminal 123 of the cell assembly, and the negative terminal 192 of the battery pack, and returns to the charger
  • the negative terminal of the battery pack 1 constitutes a charging circuit of the battery pack 1 , and the charger inputs electrical energy to the cell assembly 12 through the charging circuit.
  • the battery pack communication terminal 193 is located in the battery pack interface 16, and is used to communicate with the connected power tool 2 or the charger.
  • the terminals of the battery pack 1 are respectively clamped to the terminals of the charger by elastic force from both sides in the left and right directions. Therefore, the terminals of the charger are interfaced by the battery pack during the process of installing the battery pack 1 to the charger. 16 is guided and inserted into the terminals of the battery pack 1 , so that the terminals of the charger are clamped by the terminals of the battery pack 1 , so that the charger and the battery pack 1 are electrically connected.
  • the circuit board 18 is fixed on the upper side of the support plate 17 and is connected in series between the cell assembly 12 and the battery pack interface 16 for collecting electrical signals related to the battery pack 1 .
  • the circuit board 18 is connected in series between the cell assembly 12 and the battery pack communication terminal 193 for transmitting the information of the battery pack 1 to the power tool 2 attached to the battery pack 1 through the battery pack communication terminal 193 or on the charger.
  • the information of the battery pack 1 includes: the charging current of the battery pack 1 , the temperature, voltage, internal resistance value of the battery cell assembly 12 , and the like.
  • the battery pack 1 information is detected by the sensor, so the battery pack 1 also includes a detection sensor. The number of detection sensors can be one or more.
  • the detection sensor may be a temperature sensor, the temperature sensor is disposed on the surface of the cell assembly 12, and the temperature sensor may specifically be a thermistor.
  • the detection sensor may also be a voltage sensor for detecting the voltage of the cell assembly 12 .
  • the battery pack 1 further includes a terminal protection device 196 , which is fixed above the terminal support base 195 , and the terminal support base 195 is fixed above the support plate 17 .
  • the terminal protection device 196 is provided with an accommodating space 1961a and an accommodating space 1961b, and the accommodating space 1961a and the accommodating space 1961b are independent from each other.
  • the battery pack charging terminal 191 and the battery pack communication terminal 193 are respectively disposed in the accommodating spaces 1961 a and 1961 b for protecting the battery pack charging terminal 191 and the battery pack communication terminal 193 .
  • the terminal protection device 196 has a symmetrical structure, the battery pack charging terminal 191 and the terminal protection device 196 are used as examples for detailed description here.
  • the upper and lower parts of the terminal protection device 196 are respectively provided with straight grooves 1962a and 1962b opposite to the charging terminal clamping portion 191a in the up-down direction, for inserting the positive terminal of the charger into the battery pack charging terminal 191, Provide reserved space in the up and down direction.
  • a certain reserved space is provided between the charging terminal clamping portion 191a and the inner side surface of the accommodating space 1961a, which is used to adapt the reversible elastic deformation of the charging terminal clamping portion 191a, and also provide a charging terminal for the battery pack.
  • 191 provides cooling space.
  • the charging terminal pole piece 191b is located in the accommodating space and placed on the surface of the terminal protection device 196 .
  • the charging terminal pole piece 191b is electrically connected to the circuit board 18 through the wire 197 .
  • the wires 197 and the charging terminal pole pieces 191b are electrically connected by soldering with tin wires.
  • the battery pack charging terminal 191 is installed in the terminal protection device 196 in the front-rear direction, so that the battery pack charging terminal 191 is completely located in the accommodating space 1961a, and the charging terminal pole piece 191b and the wire 197 are electrically connected by welding, thereby realizing Vibration damping and anti-wear effect.
  • the terminal protection device 196 is made of insulating material, and optionally, insulating materials such as plastic, ceramic, and rubber can be selected.
  • the installation methods of the battery pack communication terminal 193 and the terminal protection device 196 are the same as the above steps, and the description will not be repeated here.
  • the present application is not limited to arranging the battery pack charging terminal 191 and the battery pack communication terminal 193 in the same terminal protection device 196, other battery pack terminals can also be encapsulated and protected, and the battery pack charging terminal 191
  • the communication terminal 193 with the battery pack is packaged in the accommodating space of the independent terminal protection device.
  • the battery pack 1 further includes a protection element 110 , and the protection element 110 is arranged on the discharge path to disconnect the discharge path when the discharge path of the battery pack 1 fails, Thus, the battery pack 1 and the power tool 2 are protected.
  • the discharge terminal 194 of the battery pack is connected to the discharge connection piece 140 , the protection element 110 and the positive terminal 122 of the cell assembly in sequence to form a discharge path of the battery pack 10 .
  • the discharge terminal 194 of the battery pack is connected to the discharge connection piece 140 , the protection element 110 and the negative terminal 123 of the cell assembly in sequence to form a discharge path of the battery pack 10 .
  • the protective element 110 includes a protective element rear end 110b and a protective element front end 110a.
  • the rear end 110b of the protection element is electrically connected to the discharge connecting piece 140.
  • the front end 110a of the protection element is connected to the positive terminal 122 of the cell assembly.
  • the front end 110a of the protection element is electrically connected to the negative terminal 123 of the cell assembly.
  • the protection element 110 is configured to be disconnected when the discharge current flowing through the discharge path is greater than or equal to a preset current value to cut off the discharge path, thereby stopping the battery pack 1 from outputting electrical energy to improve the safety of the battery pack 1 .
  • the protection element 110 fuses itself to cut off the discharge path when the discharge current abnormally increases to a preset current value.
  • the battery pack 1 is a different-port battery pack, and the protection element 110 is arranged in the discharge path and also in the charging path, so as to ensure that after the protection element 110 in the discharge path of the battery pack 1 is disconnected, the protection element 110 cannot
  • the battery pack 1 performs a charging operation, and the above-mentioned charging path and the discharging path are not the same path.
  • the battery pack charging terminal 191 is connected to the circuit board 18, the charging fuse (not shown in the figure), the charging connecting piece 120, the charging connecting piece lead 130, the protection element 110 and the positive terminal 122 of the cell assembly in sequence, It constitutes the charging path of the battery pack 1 .
  • the lead wire 130 of the charging connection piece is connected to the rear end 110b of the protection element.
  • the battery pack charging terminal 191 is connected to the circuit board 18 , the charging fuse (not shown in the figure), the charging connecting piece 120 , the charging connecting piece wire 130 , the protection element 110 and the negative terminal 123 of the cell assembly in sequence. , which constitutes the charging path of the battery pack 1 .
  • the lead wire 130 of the charging connection piece is connected to the rear end 110b of the protection element.
  • the protection element 110 When the protection element 110 is disconnected due to the failure of the discharge path of the battery pack 1, the charging operation cannot be completed due to the disconnection of the protection element 110 in the charging path.
  • the protection element 110 may be one of fuses such as a blade fuse, a wrap fuse, a chip fuse, etc., which is not limited herein.
  • the charging connection piece 120 and the discharge connection piece 140 are made of materials with good electrical conductivity, which are not limited here.
  • the charging fuse is located on the surface of the circuit board 18, and a three-terminal fuse can be selected. When the current value flowing through the charging path is abnormal, the three-terminal fuse is blown due to high temperature, thereby protecting the battery pack 1 and making it no longer perform the charging operation. .
  • the battery pack 1 further includes a sealing member 13 and a plurality of elastic pads 14 .
  • the cell assembly 12 , the sealing member 13 and the plurality of elastic pads 14 are all arranged in the casing 11 .
  • the cell assembly 12 includes a plurality of cell units 121 .
  • the cell unit 121 includes a positive electrode 1211 of the cell unit and a negative electrode 1212 of the cell unit, and is used for outputting the electric energy of the cell unit 121 or inputting the electric energy to charge the cell unit 121 .
  • a plurality of cell units 121 form the cell assembly 12 in the form of series, parallel or a combination of series and parallel.
  • the voltage of a single cell unit 121 is 4.2V.
  • the cell unit 121 further includes a cell unit casing (not shown in the figure) for encapsulating the cells to prevent leakage of compounds in the cells.
  • the package may be an aluminum-plastic film, but is not limited to the aluminum-plastic film.
  • a plurality of battery cell units 121 are sequentially stacked and arranged in an up-down direction.
  • the sealing member 13 is partially located on the upper surface of the cell assembly 12 , and the sealing member 13 and the lower case 112 form a sealed cavity (not shown in the figure) for sealing the cell assembly 12 in the lower case of the battery pack 10 112.
  • the sealing member 13 is formed by pouring glue. After the cell assembly 12 is put into the lower casing 112, the sealing glue is injected into the lower casing 112 from the upper surface of the cell assembly 12, so as to seal the cell assembly 12 into the lower casing 112. Assembly 12 is sealed in lower housing 112 .
  • a plurality of elastic pads 14 are respectively disposed between adjacent cell units 121 , and the elastic pads 14 are disposed opposite to the cell units 121 in the up-down direction.
  • the outer dimension of the elastic pad 14 is basically the same as the outer dimension of the cell unit 121.
  • the elastic pad 14 is set in a "return" shape, and is made of a material whose deformation is reversible, and at the same time has a good heat conduction effect.
  • the elastic pad 14 can be made of sponge material or other materials with good heat dissipation effect.
  • the battery pack further includes a ventilation element 15, which is used to balance the air pressure inside and outside the battery pack and have the function of waterproof and dustproof.
  • the ventilation element 15 is integrally arranged in the casing 11 of the battery pack.
  • the ventilation element 15 communicates with a plurality of air cavities 152 and also communicates with the air outside the sealing cavity (not shown) formed by the sealing member 13 and the lower casing 112 .
  • the ventilation element 15 is partially disposed on the side of the cell assembly 12 and located in the plurality of air cavities 152 .
  • the ventilating element 15 is provided with a plurality of ventilating pin ends 153, and each ventilating pin end 153 is in contact with the upper surface or the lower surface of the corresponding elastic pad 14, and extends to the corresponding corresponding elastic pad 14 along the first direction.
  • the inside of the air cavity 152 is used to realize the air pressure balance inside and outside the sealed cavity formed by the sealing element 13 and the lower casing 112 .
  • the ventilating element 15 further includes a ventilating body 151 disposed on the side of the cell assembly 12 , and the ventilating body 151 is connected to a plurality of ventilating pin ends 153 .
  • the breathable body 151 is located at least partially in the air outside the sealed cavity.
  • FIG. 15 shows a partial cross-sectional view of the battery pack 10 .
  • the breathable main body 151 protrudes from the upper surface of the sealing member 13 in the up-down direction. Note that in this embodiment, the height of the upper surface of the ventilating body 151 higher than the upper surface of the sealing member 13 is not limited, which can be selected according to the actual design situation.
  • the breathable body 151 is flush with the sealing member 13 in the up-down direction.
  • the upper surface of the ventilating main body 151 can be in contact with the air outside the above-mentioned sealed cavity, and the air pressure inside and outside the above-mentioned sealed cavity can also be balanced.
  • the upper surface of the sealing member 13 is not in a plane, and the upper surface of the breathable main body 151 is flush with the upper surface of the groove of the sealing member 13.
  • the upper surface of the ventilating main body 151 can be in contact with the air outside the above-mentioned sealed cavity, and the air pressure inside and outside the sealed cavity can also be balanced.
  • the ventilation pin ends 153 of the ventilation element 15 are fixed to the surfaces of the corresponding plurality of elastic pads 14 through glue, and the breathable main body 151 of the ventilation element 15 is fixed to the battery cell through glue.
  • a sealing cavity is formed with the lower casing 112 by pouring glue on the upper surface of the cell assembly 12 to seal the cell assembly 12. in the sealed cavity.
  • the ventilation element 15 in this embodiment is not limited to be disposed on the left side of the cell assembly 12 shown in FIG.
  • the ventilation element 15 is made of waterproof and breathable paper, which has a waterproof level of IPX7 and has a good ventilation function.
  • the ventilating element 15 in this embodiment adopts waterproof and ventilating paper with a thickness ranging from 0.3 mm to 4 mm.
  • the air pressure in the sealed cavity increases due to the temperature rise, and the internal and external air pressures are balanced by the ventilating element 15, so as to achieve the internal and external air pressure balance of the sealed cavity in the casing 11 to avoid the occurrence of
  • the deformation of the casing 11 due to the high air pressure in the sealed cavity increases the service life of the battery pack 1 and enhances the safety and performance stability of the battery pack 1 .
  • the elastic pad 14 Openings are provided on the left or/and right side, that is, a complete "back" font is not formed.
  • a plurality of separation rib positions are formed or connected on the inner surface of the lower casing 112 , including a separation rib position 1121 , a separation rib position 1122 , a separation rib position 1123 and a separation rib position 1124.
  • the separation rib position 1121 and the separation rib position 1122 are arranged at the rear end of the lower casing 112
  • the separation rib position 1123 and the separation rib position 1124 are arranged at the front end of the lower casing 112 .
  • the distance between the separation rib position 1121 and the separation rib position 1122 in the front-rear direction is approximately twice the width of the separation rib position 1121 or the separation rib position 1122 .
  • the distance between the separation rib position 1123 and the separation rib position 1124 in the front-rear direction is approximately twice the width of the separation rib position 1123 or the separation rib position 1124 .
  • the separation rib position 1121 or the separation rib position 1122 is approximately located at one-third of the distance from the rear end of the lower casing 112, and the separation rib position 1123 or the separation rib position 1124 is approximately located at one-third of the distance from the front end of the lower casing 112. place.
  • a sealing strip is provided between the separation rib position 1121 and the separation rib position 1122 , and a sealing strip is also set between the separation rib position 1123 and the separation rib position 1124 .
  • the sealing strip in this embodiment is set as a sponge strip.
  • the separation rib position 1121 , the separation rib position 1122 , the separation rib position 1123 and the separation rib position 1124 are arranged in a U-shape.
  • its part on the bottom of the lower casing 112 and its part on the side part of the lower casing 112 are not in the same plane and are staggered from each other, and other separation rib positions
  • the setting is also performed according to this method, and will not be described in detail.
  • the cell assembly 12 is placed in the inner cavity 113 formed by the casing 11 , and the separation ribs provided on the lower casing 112 are fully in contact with the lower surface and the side surface of the cell assembly 12 .
  • the inner cavity 113 loaded into the cell assembly 12 is divided into a first part 1131 , a second part 1133 and a middle part 1132 .
  • sealant is injected relative to the upper surfaces of the cell assemblies 12 of the first part 1131 and the second part 1133 in the up-down direction, and the first part 1131 and the second part 1133 are sealed with glue, and the middle part 1132 constitutes an independent Breathable cavity (not shown in the figure).
  • the air pressure balance is achieved by the elastic pad 14, so as to realize the air pressure balance between the inside and outside of the sealed cavity formed by the sealing member 13 and the lower case 112, so as to avoid the occurrence of excessive air pressure in the above-mentioned sealed cavity.
  • the phenomenon of deformation of the casing 11 due to the high height reduces the cost, simplifies the structure, reduces the amount of glue poured, and reduces the weight of the battery pack 10 .
  • the battery pack 2 includes an upper case 211 and a lower case 212 formed with an inner cavity 213 .
  • the cell assembly 22 , the sealing member 23 and the deformation assembly 24 are all arranged in the inner cavity 113 .
  • the sealing member 23 and the lower casing 212 form a sealed cavity (not shown), and the cell assembly 22 is arranged in the sealed cavity.
  • the deformation assembly 24 includes a plurality of deformation elements 241 .
  • the deformation elements 241 are respectively disposed between adjacent cell units 221 , and the plurality of deformation elements 41 are disposed opposite to the cell units 221 in the up-down direction.
  • the outer dimension of the deformation element 241 is basically the same as the outer dimension of the battery cell unit 221. Since the battery cell unit 221 may expand in volume during high temperature or charging process, in order to provide enough reserved expansion space, it has a relatively large volume.
  • the deformation elements 241 can be made of a material with reversible deformation, and at the same time, it has a good heat conduction effect.
  • the deformation element 241 can be made of sponge material or other materials with good heat dissipation effect.
  • the material of the deformation element is not limited in this application, and magnetic deformation or other deformation methods can also be used to adapt to the air cavity 242 .
  • the battery pack 2 Since the battery pack is stored at high temperature or during charging and discharging, the air pressure of the sealed cavity increases with the temperature rise, which squeezes the battery cell unit 221, and the gas pressure squeezes the battery cell unit 221 to move to both sides of the stacking surface. , and finally squeeze the shell to produce deformation.
  • the battery pack 2 further includes a ventilation device 25 , and the air pressure inside and outside the sealed cavity can be balanced by arranging the ventilation device 25 .
  • the ventilation device 25 is partially disposed on the side of the cell assembly 22 . Specifically, the ventilation device 25 is disposed on the side away from the positive electrode 2211 of the cell unit or the negative electrode 2212 of the cell unit.
  • the ventilation device 25 includes a first element 251 , a second element 252 and a connecting piece 253 .
  • the first element 251 is disposed on the side of the cell assembly 22 , and the first element 251 is provided with a through hole 2511 along the front-rear direction.
  • the boundary is provided below the lower surface of the deformation assembly 24 .
  • the first element 251 is adhered to the side surface of the cell assembly 22 by glue.
  • the second element 252 is fixed on the first element 251 through the connecting piece 253 .
  • the second element 252 is made of polycarbonate (Polycarbonate, PC) material, and the connecting member 253 is set as a back glue.
  • At least one ventilation channel 254 is formed on the ventilation device 25 .
  • the ventilation channel 254 communicates with the plurality of air cavities 242 and communicates with the air outside the above-mentioned sealed cavity, so as to balance the air pressure inside and outside the sealed cavity of the battery pack 2 .
  • the connecting member 253 is provided with a through hole 2531 along the front-rear direction. Specifically, the outer dimension of the through hole 2531 is substantially the same as the outer dimension of the through hole 2511 on the first element 251 .
  • the connecting member 253 is provided with a straight groove 2532 above the through hole 2531 in the up-down direction.
  • the straight groove 2532 forms a ventilation channel 254 with the first side surface 2512 of the first element 251 and the first side surface 2521 of the second element 252 .
  • the direction of the arrow in FIG. 26 is the direction of air flow in the battery pack 2 .
  • the air in the air cavity 242 communicates with the ventilation channel 2532 through the deformation element 241, the through hole 2511 of the first element 251, and the through hole 2531 of the connector 253, so as to communicate with the outside of the above-mentioned sealed cavity.
  • the air is communicated with each other, and the air pressure inside and outside the sealed cavity of the battery pack 2 is balanced.
  • the deformation element 241 can be set as an incomplete "back" shape.
  • the deformation element 241 is provided with a cutout 243 on the side connected with the ventilation device 25 .
  • the air in the air cavity 242 passes through the incision 243 on the deformation element 241, the through hole 2511 of the first element 251, the through hole 2511 of the connecting piece 253, and then communicates with the air outside the above-mentioned sealed cavity through the ventilation channel 245, thereby realizing the battery pack. 2. Balance of air pressure inside and outside the sealed chamber.
  • the thickness of the back glue is optionally set within a range of greater than or equal to 0.05 mm and less than or equal to 1 mm.
  • the connector 253 may also be directly disposed on the first element 251 or the second element 252 . During the assembly process of the ventilation device 25, the first element 251 and the second element 252 are directly assembled.
  • the deformation element 241 in this embodiment has good air permeability
  • the deformation element 241 can also be set to the shape shown in FIG.
  • the hole 2511 and the through hole 2531 of the connector 253 communicate with the air outside the sealed cavity through the ventilation channel 254 , so as to achieve the balance of air pressure inside and outside the sealed cavity of the battery pack 2 .
  • the ventilation device 35 also has other implementations. Specifically, as shown in FIGS. 28 to 29 , the first element 351 is formed with a through hole 3512 , and the first side surface 522 of the first element 351 is formed with a straight groove 3511 extending in the up-down direction.
  • the straight groove 3511 communicates with the through hole 3512 and is located above the through hole 3512 . In this embodiment, the depth of the straight groove 3511 does not exceed the thickness of the first element 351 .
  • the straight groove 3511 and the first side surface 3531 of the connecting piece 353 form a ventilation channel 354 .
  • the first element 351 is optionally made of modified polypropylene (Modified Propylene Polymer, MPP) material or rubber material, and the thickness of the first element 351 is optional
  • MPP Modified Propylene Polymer
  • the ground is set within a range of 2 mm or more and 10 mm or less. It should be noted here that the depth and width of the straight groove 3511 can be set according to the specific use environment.
  • the first element 351 , the second element 352 and the connecting piece 353 in this embodiment are the same as the installation methods in the above-mentioned embodiments, and will not be repeated here.
  • the first element 451 is formed with a first through hole 4512
  • the first element 451 is further formed with a second through hole 4511 extending in the up-down direction.
  • the second through hole 4511 is located above the first through hole 4512 and communicates with the first through hole 4512 for forming the ventilation channel 454 .
  • the second through hole 4511 constitutes the ventilation channel 454 .
  • the air in the air cavity passes through the first through hole 4512 of the first element 451, and then communicates with the air outside the above-mentioned sealed cavity through the ventilation channel 454, so as to balance the air pressure inside and outside the sealed cavity of the battery pack.
  • the first element 451 is made of MPP material, and the thickness of the first element 451 is set within a range of greater than or equal to 2 mm and less than or equal to 10 mm. It should be noted here that the diameter of the second through hole 4511 is set according to the specific use environment of the battery pack.
  • the first element 451 , the second element 3452 and the connecting piece 453 in this embodiment are the same as the installation methods in the above-mentioned embodiments, and will not be repeated here.
  • the first element 551 is formed with a first through hole 5511 extending in the front-rear direction
  • the connecting member 553 is formed with a second through-hole 5531 extending in the front-rear direction.
  • the first through hole 5511 and the second through hole 5531 communicate with each other and have approximately the same size.
  • the second member 552 is formed with grooves 5521 provided in the up-down direction.
  • the groove 5521 and the front side 5532 of the connecting member 553 form a ventilation channel 554 .
  • the second element 552 is made of PC material, and the thickness of the second element 552 is set within a range of greater than or equal to 0.5 mm and less than or equal to 2 mm. It should be noted here that the depth of the groove 5521 can be set according to the specific usage environment of the battery pack.
  • the first element 551 , the second element 553 and the connecting piece 552 in this embodiment are the same as the installation methods in the above-mentioned embodiments, and will not be repeated here.
  • the ventilation devices in the above exemplary embodiments are higher than the upper surface of the sealing member in the vertical direction of the battery pack. It can be understood that the ventilation device is also arranged to be flush with or lower than the upper surface of the sealing member in the vertical direction. Can communicate with the air outside the sealed cavity in the battery pack.
  • the air pressure balance between the inside and outside of the sealed cavity of the battery pack is realized through the ventilation channel on the ventilation device. It is ensured that during the high temperature storage or charging and discharging process of the battery pack, the air pressure of the sealed cavity will not increase significantly with the rise of temperature, which improves the safety performance of the battery pack.
  • the structure and assembly process of the ventilation device in the above embodiments are simple, the cost is low, and it is easy to implement.

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Abstract

本申请公开了一种电池包和电动工具，电池包包括壳体；电芯组件，包括多个层叠排布的电芯单元；弹性垫，分别设置在相邻的电芯单元之间，弹性垫与相邻的电芯单元之间形成有空气腔；密封件，至少设置在电芯组件的表面，密封件与壳体形成有一密封腔；透气元件，部分设置于电芯组件的侧面，并沿第一方向延伸至多个空气腔内，透气元件与密封腔外的空气连通。

Description

电池包及电动工具
本申请要求在2021年4月15日提交中国专利局、申请号为202110403306.1的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中；
本申请要求在2021年4月15日提交中国专利局、申请号为202110403389.4的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中；
本申请要求在2021年4月15日提交中国专利局、申请号为202110403460.9的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中；
本申请要求在2021年5月12日提交中国专利局、申请号为202110517154.8的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中；
本申请要求在2021年5月12日提交中国专利局、申请号为202110519193.1的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及一种电池包，例如涉及一种适用于电动工具的电池包。
背景技术
近年来，随着电动工具的普及，适用于电动工具的电池包也逐渐被广泛应用。由于电池包有防尘防水的要求，相关技术大多将电池包中电芯单元层层叠放后，采用密封胶灌封。电池包在高温存储或充放电过程中，密封空间的气压随着温度的上升而增大，对电芯单元产生挤压，气体压强挤压电芯，使得电芯向叠放面两侧产生位移，最终挤压塑胶机壳变形，影响产品的外观。
发明内容
本申请提供一种适用于电动工具的电池包，使得电池包结构更简单，成本更低，减轻整包重量的同时，能够实现电池包的内外气压平衡。
本申请采用如下技术方案：
一种电池包，设置为给电动工具供电，所述电池包包括：壳体；电芯组件，设置在所述壳体内，所述电芯组件包括多个层叠排布的电芯单元；弹性垫，所述弹性垫分别设置在相邻的所述电芯单元之间；所述弹性垫与相邻的所述电芯单元之间形成有空气腔；密封件，至少设置在所述电芯组件的表面，所述密封件与所述壳体形成有一密封腔；透气元件，部分设置于所述电芯组件的侧面，并沿第一方向延伸至多个所述空气腔内；所述透气元件与所述密封腔外的空气连通。
进一步地，所述透气元件包括透气主体和多个透气引脚端，多个所述透气引脚端与所述透气主体相连。
进一步地，所述透气主体设置于所述电芯组件的侧面，所述透气引脚端的至少部分位于所述空气腔内。
进一步地，所述透气主体的上表面高于所述密封件的上表面。
进一步地，所述透气主体的上表面与所述密封件的上表面齐平。
进一步地，所述密封件的上表面形成有一凹槽，所述透气主体的上表面与所述凹槽所在的所述密封件的上表面齐平。
进一步地，所述透气元件由防水透气材质制成。
进一步地，所述透气元件的厚度大于0.3mm且小于4mm。
进一步地，所述弹性垫设置为形变可逆的材料。
进一步地，所述弹性垫设置为导热材料或包含导热部件。
进一步地，所述弹性垫的靠近所述透气元件的一侧形成有一开口，所述开口中的空气与所述空气腔中的空气连通。
进一步地，所述壳体包括上壳体和下壳体，所述密封件与所述下壳体形成所述密封腔，所述电芯组件设置于所述密封腔内。
进一步地，所述下壳体的内表面上形成有分离筋位，所述分离筋位将所述密封腔分割成第一部分、第二部分和中间部分。
进一步地，所述第一部分位于所述密封腔的靠近所述电芯组件的后端的一 侧，所述第二部分位于所述密封腔的靠近所述电芯组件的前端的一侧。
进一步地，所述中间部分在上下方向上与多个所述空气腔相对设置。
一种电池包，设置为给电动工具供电，所述电池包包括：壳体；电芯组件，设置在所述壳体内，所述电芯组件包括多个层叠排布的电芯单元；弹性垫，所述弹性垫分别设置在相邻的所述电芯单元之间；所述弹性垫与相邻的所述电芯单元之间形成有空气腔；密封件，至少设置在所述电芯组件的表面，所述密封件与所述壳体形成有一密封腔；透气元件，所述透气元件与所述空气腔连通；所述透气元件与所述密封腔外的空气连通。
进一步地，所述透气元件包括透气主体和多个透气引脚端，多个所述透气引脚端与所述透气主体相连。
一种电动工具，包括用于为所述电动工具进行供电的电池包，所述电池包包括：壳体；电芯组件，设置在所述壳体内，所述电芯组件包括多个层叠排布的电芯单元；弹性垫，所述弹性垫分别设置在相邻的所述电芯单元之间；所述弹性垫与相邻的所述电芯单元之间形成有空气腔；密封件，至少设置在所述电芯组件的表面，所述密封件与所述壳体形成有一密封腔；透气元件，部分设置于所述电芯组件的侧面，并沿第一方向延伸至多个所述空气腔内；所述透气元件与所述密封腔外的空气连通。
进一步地，所述透气元件包括透气主体和多个透气引脚端，多个所述透气引脚端与所述透气主体相连。
进一步地，所述透气主体设置于所述电芯组件的侧面，所述透气引脚端的至少部分位于所述空气腔内。
一种电池包，设置为给电动工具供电，所述电池包包括：壳体；电芯组件，位于所述壳体内，所述电芯组件包括电芯组件正极端子和电芯组件负极端子；电池包接口，设置于所述壳体的表面；电池包端子，位于所述电池包接口中，所述电池包端子包括电池包充电端子和电池包放电端子；所述电池包充电端子经过所述电池包的充电路径与所述电芯组件正极端子或所述电芯组件负极端子 电性相连；所述电池包放电端子经过所述电池包的放电路径与所述电芯组件正极端子或所述电芯组件负极端子电性相连；保护元件，所述保护元件同时设置于所述充电路径和所述放电路径中。
进一步地，所述电池包还包括充电连接片和放电连接片，所述充电连接片设置于所述充电路径中，所述放电连接片设置于所述放电路径中。
进一步地，所述充电连接片通过电路板与所述电池包充电端子电性连接。
进一步地，所述放电连接片与所述电池包放电端子电性连接。
进一步地，所述保护元件的前端设置为与所述电芯组件正极端子或所述电芯组件的负极端子电性连接。
进一步地，所述保护元件的后端与所述充电连接片电性连接。
进一步地，所述保护元件的后端与所述充电连接片之间通过导线电性连接。
进一步地，所述保护元件设置为插片式保险丝，裹敷式保险丝，贴片式保险丝等保险丝中的一种。
进一步地，所述充电连接片和所述放电连接片为导电材质。
进一步地，所述电芯组件包括多个电芯单元。
进一步地，所述充电路径与所述放电路径不同。
一种电池包，设置为给电动工具供电，所述电池包包括：壳体，包括上壳体和下壳体；电芯组件，设置在所述壳体内；支撑板，设置在所述上壳体与所述下壳体之间；电路板，固定在所述支撑板的上表面；端子组件，部分固定于所述支撑板的上表面，所述端子组件包括：多个电池包端子，所述电池包端子包括端子夹持部和端子极片；端子支撑座，用于固定所述电池包端子；所述端子组件还包括，端子保护装置，固定于所述端子支撑座，所述端子保护装置形成有多个容纳空间，多个所述容纳空间之间相互独立。
进一步地，多个所述电池包端子分别位于多个所述容纳空间内。
进一步地，所述容纳空间的内表面与所述端子夹持部之间设有间隙。
进一步地，所述间隙可适配所述端子夹持部发生可逆弹性形变。
进一步地，所述端子保护装置形成有沿前后方向延伸的直槽，所述直槽在上下方向上与所述端子夹持部相对设置。
进一步地，所述端子极片与所述电路板之间通过导线实现电性连接。
进一步地，所述端子保护装置设置为塑胶材质；
所述端子保护装置设置为绝缘材质。
进一步地，所述电芯组件包括多个电芯单元。
一种电池包，设置为给电动工具供电，所述电池包包括：壳体；电芯组件，设置在所述壳体内，所述电芯组件包括多个层叠排布的电芯单元；弹性组件，所述弹性组件包括多个弹性垫，多个所述弹性垫分别设置在相邻的所述电芯单元之间；多个所述弹性垫与相邻的所述电芯单元形成有多个空气腔；密封件，至少设置在所述电芯组件的表面，所述密封件与所述壳体形成有一密封腔；透气装置，部分设置于所述电芯组件的侧面；所述透气装置包括第一元件、第二元件以及连接件，所述第一元件与所述第二元件之间通过连接件固定；所述连接件连接或形成有透气通道；所述透气通道与多个所述空气腔连通；所述透气通道与所述密封腔外空气连通。
进一步地，所述第一元件部分设置于所述电芯组件的侧面。
进一步地，所述弹性垫设置为形变可逆的材料。
进一步地，所述弹性垫设置为导热材料或包含导热部件。
进一步地，所述电芯组件设置于所述密封腔内。
进一步地，所述密封件通过灌胶工艺形成。
进一步地，所述第二元件设置为PC材质。
进一步地，所述连接件的厚度范围设置为大于等于0.05mm且小于等于1mm。
进一步地，所述连接件设置为背胶。
一种电池包，设置为给电动工具供电，所述电池包包括：壳体；电芯组件，设置在所述壳体内，所述电芯组件包括多个层叠排布的电芯单元；形变组件，所述形变组件包括多个形变元件，多个所述形变元件分别设置在相邻的所述电 芯单元之间；多个所述形变元件与相邻的所述电芯单元形成有多个空气腔；密封件，至少设置在所述电芯组件的表面，所述密封件与所述壳体形成有一密封腔；透气装置，部分设置于所述电芯组件的侧面；所述透气装置至少包括第一元件、第二元件，所述第一元件与所述第二元件之间通过连接件固定；所述第一元件或所述第二元件上形成或连接有至少一个透气通道；所述透气通道与多个所述空气腔连通或通过所述形变组件与多个所述空气腔连通；所述透气通道与所述密封腔外的空气连通。
进一步地，所述第一元件部分设置于所述电芯组件的侧面。
进一步地，所述形变元件的形变设置为适配所述空气腔。
进一步地，所述形变元件设置为导热材料或包含导热部件。
进一步地，所述形变元件设置为透气材料。
进一步地，所述电芯组件设置于所述密封腔内。
进一步地，所述密封件通过灌胶工艺形成。
进一步地，所述第一元件设置为MPP材质。
进一步地，所述第二元件设置为PC材质。
附图说明
图1是作为具体实施例的电动工具的结构图；
图2是电池包的结构图；
图3是图2中的电池包的爆炸图；
图4是图2中的电池包的局部结构爆炸图；
图5是图2中的电池包端子结构示图；
图6是图2中的电池包的端子保护装置结构示图；
图7是图2中的电池包的保护元件结构示图；
图8是图2中的电池包的保护元件的另一视角结构示图；
图9是电池包充电路径和放电路径原理图；
图10是电池包的另一实施例的充电路径和放电路径原理图；
图11是图2中的电池包的局部爆炸图；
图12是透气元件结构示图；
图13是透气元件与电芯组件结构示图；
图14是透气元件与密封件结构示图；
图15是图14的剖面图；
图16是图15中A处的局部放大图；
图17是另一实施例中与A处相对应的局部放大图；
图18是又一实施例中与A处相对应的局部放大图；
图19是另一实施例中弹性垫的结构示图；
图20是另一实施例中分离筋位的结构示图；
图21是另一实施例的电池包结构爆炸图；
图22是图21中的电池包的电芯组件与形变组件的结构示图；
图23是电芯组件与透气装置的结构示图；
图24是图23中A处的局部放大图；
图25是透气装置的一种实施例的爆炸图；
图26是电池包中空气流通路径图；
图27是形变组件另一种实施例的结构图；
图28是作为另一种实施例的透气装置的局部结构图；
图29是图28中的透气装置的结构爆炸图；
图30是作为另一种实施例的透气装置的局部结构图；
图31是图30中的透气装置的结构爆炸图；
图32是作为另一种实施例的透气装置的局部结构图；
图33是图32中的透气装置的结构爆炸图。
具体实施方式
以下结合附图和具体实施例对本申请作具体的介绍。
图1示出了一种电动工具2及可适配电动工具2并为电动工具2供电的电池包1。在此实施例中，电动工具2为电钻，但应该理解为还可以适用于电动扳手、电动螺丝批、电锤钻、电圆锯、砂光机等手持式电动工具，台锯等台型电动工具以及割草机、打草机、电剪刀、修枝机、电锯等户外工具。显然，以下的实施例是本申请一部分实施例，而不是全部的实施例。
参照图2至图3所示，电池包1至少包括壳体11和电芯组件12以及密封件13。其中，壳体11包括在分界面处组装以形成内腔113的上壳体111和下壳体112。电芯组件12设置在壳体11所形成的内腔113中。电芯组件12还包括电芯组件正极端子122和电芯组件负极端子123，用于输出电芯组件12的电能或输入电能为电芯组件12充电。
电池包1还包括电池包接口16，至少与电芯组件12电性连接。具体地，电池包接口16形成于上壳体111的上表面。
参见图4至图6所示，电池包1还包括支撑板17、主电路板18和端子组件19。
支撑板17，设置于下壳体112的上方，支撑板17与下壳体112形成内腔113，用于容纳电芯组件12。同样地，支撑板17与上壳体111也形成一个容纳空间(图未示)，用于容纳主电路板18、端子组件19等部件。具体地，支撑板17呈平板状结构，支撑板17与下壳体112可拆卸式连连接。
端子组件19，包括电池包充电端子191、电池包负极端子192、电池包通信端子193、电池包放电端子194以及端子支撑座195。其中，端子支撑座195用于将电池包充电端子191、电池包负极端子192、电池包通信端子193以及电池包放电端子194固定于支撑板17。电池包充电端子191和电芯组件正极端子122电性连接，电池包充电端子191位于电池包接口16中。电池包负极端子192和电芯组件负极端子123电性连接，电池包负极端子192位于电池包接口16中。电池包充电端子191和电池包负极端子193被配置为与充电器的正极端子(未 示出)和充电器的负极端子(未示出)相配合以向电池包1输入电能。
在一些实施例中，充电器还包括充电器通信端子(未示出)，充电器通过充电器通信端子和电池包通信端子193连接以和电池包1通信。充电器将交流电转换成直流电输出，电能通过充电器的正极端子、电池包充电端子191，经过电芯组件正极端子122，再经过电芯组件负极端子123、电池包负极端子192，回到充电器的负极端子，从而构成一个电池包1的充电回路，充电器通过充电回路对电芯组件12输入电能。另外，电池包通信端子193位于电池包接口16中，用于和被接入的电动工具2或充电器进行通信。作为具体实施方式的一种，电池包1的端子通过从左右方向两侧用弹力分别夹住充电器的端子，因此，充电器的端子在电池包1安装至充电器的过程中被电池包接口16引导而插入到电池包1的端子，使得充电器的端子被电池包1的端子夹持，从而使得充电器与电池包1实现电连接。
电路板18，固定于支撑板17的上侧，串联在电芯组件12与电池包接口16之间，用于采集与电池包1有关的电信号。在一些实施例中，电路板18串联在电芯组件12和电池包通信端子193之间，用于将电池包1的信息通过电池包通信端子193传输至附接在电池包1的电动工具2或充电器上。具体地，电池包1的信息包括：电池包1的充电电流，电芯组件12的温度、电压、内阻值等。通常电池包1信息由传感器检测，因此电池包1还包括检测传感器。检测传感器的数量可以为一个或多个。在一些实施方式中，检测传感器可以为温度传感器，温度传感器设置在电芯组件12的表面，温度传感器具体可以为热敏电阻。检测传感器还可以为电压传感器，用于检测电芯组件12的电压。
电池包1还包括端子保护装置196，固定于端子支撑座195上方，端子支撑座195固定于支撑板17上方。端子保护装置196设有容纳空间1961a和容纳空间1961b，容纳空间1961a和容纳空间1961b之间相互独立。具体地，电池包充电端子191和电池包通信端子193分别设置于容纳空间1961a和1961b中，用于保护电池包充电端子191和电池包通信端子193。作为具体实施例的一种，参 照图6所示，由于端子保护装置196为对称结构，此处以电池包充电端子191与端子保护装置196为例详细说明。具体地，端子保护装置196的上部和下部分别设有与充电端子夹持部191a在上下方向上相对设置的直槽1962a和1962b，用于为充电器的正极端子插入电池包充电端子191时，在上下方向上提供预留空间。可选地，充电端子夹持部191a与容纳空间1961a的内侧面之间均设有一定的预留空隙，用于适配充电端子夹持部191a可逆弹性形变的同时，也为电池包充电端子191提供散热空间。充电端子极片191b位于容纳空间内并放置在端子保护装置196的表面。充电端子极片191b通过导线197与电路板18实现电性连接。本实施例中，导线197与充电端子极片191b之间通过锡丝焊接实现电性连接。在装配过程中，电池包充电端子191沿前后方向装入端子保护装置196，使得电池包充电端子191完全位于容纳空间1961a中，充电端子极片191b与导线197通过焊接实现电性连接，从而实现减振和抗磨损作用。端子保护装置196采用绝缘材质制成，可选地，可选用塑料、陶瓷、橡胶等绝缘材质。
此处需要说明的是，电池包通信端子193与端子保护装置196的安装方式与上述步骤一致，此处不再重复说明。此外，本申请不局限于将电池包充电端子191和电池包通讯端子193设置于同一个端子保护装置196的中，也可对其他电池包端子进行封装保护，另外也可将电池包充电端子191和电池包通讯端子193封装在独立的端子保护装置的容纳空间中。
在一些实施例中，参照图7至图10所示，电池包1还包括保护元件110，保护元件110设置于放电路径上，用于实现在电池包1放电路径故障时，断开放电路径，从而保护电池包1和电动工具2。
在一些实施例中，电池包放电端子194与放电连接片140、保护元件110和电芯组件正极端子122依次连接，构成电池包10的放电路径。
在另一些实施例中，电池包放电端子194与放电连接片140、保护元件110和电芯组件负极端子123依次连接，构成电池包10的放电路径。
保护元件110包括保护元件后端110b和保护元件前端110a。其中，保护元 件后端110b与放电连接片140电性相连。在一些实施例中，电池包放电端子194与电芯组件正极端子122电性连接时，保护元件前端110a与电芯组件正极端子122相连。在一些实施例中，电池包放电端子194与电芯组件负极端子123电性连接时，保护元件前端110a与电芯组件负极端子123电性连接。
在一些实施例中，当电池包1的放电电流大于等于电流预设值时断开。具体地，保护元件110被配置为在流经放电路径的放电电流大于等于电流预设值时断开以切断放电路径，从而使电池包1停止输出电能以提高电池包1的安全性。在一些实施例中，保护元件110在放电电流异常升高到电流预设值时，自身熔断切断放电路径。
在一些实施例中，电池包1为异口电池包，保护元件110设置在放电路径中的同时，也设置在充电路径中，保证电池包1的放电路径中保护元件110断开后，不能对电池包1进行充电操作，上述充电路径与放电路径不是同一路径。
在一些实施例中，电池包充电端子191与电路板18、充电保险丝(图中未示出)、充电连接片120、充电连接片导线130、保护元件110和电芯组件正极端子122依次连接，构成电池包1的充电路径。其中，充电连接片导线130与保护元件后端110b相连。
在另一些实施例中，电池包充电端子191与电路板18、充电保险丝(图中未示出)、充电连接片120、充电连接片导线130、保护元件110和电芯组件负极端子123依次连接，构成电池包1的充电路径。其中，充电连接片导线130与保护元件后端110b相连。
在电池包1的放电路径出现故障导致保护元件110断开时，充电路径中由于保护元件110的断开，不能完成充电操作。本实施例中，保护元件110具体可以为插片式保险丝，裹敷式保险丝，贴片式保险丝等保险丝中的一种，在此并没有限制。另外充电连接片120以及放电连接片140选用导电性能良好的材质，此处也不做限制。可选地，充电保险丝位于电路板18的表面，可选用三端保险丝，在流经充电路径中电流值异常时，三端保险丝因高温熔断，从而保护 电池包1，使其不再进行充电操作。
参照图3和图11所示，电池包1还包括密封件13以及多个弹性垫14。电芯组件12、密封件13以及多个弹性垫14均设置在壳体11内。电芯组件12包括多个电芯单元121，电芯单元121包括电芯单元正极1211和电芯单元负极1212，用于输出电芯单元121的电能或输入电能为电芯单元121充电。通常多个电芯单元121通过串联、并联或者串联与并联结合的形式组成电芯组件12。具体地，单个电芯单元121的电压为4.2V。电芯单元121还包括电芯单元外壳(图中未示出)，用于封装电芯以防止电芯内的化合物泄漏。在一些具体的实施例中，封装件可以为铝塑膜，但是并不限于铝塑膜。作为具体实施例的一种，多个电芯单元121沿上下方向按顺序堆叠排布。
密封件13，部分位于电芯组件12的上表面，密封件13与下壳体112形成一密封腔(图中未示出)，用于将电芯组件12密封在电池包10的下壳体112中。本实施例中，密封件13采用灌胶的方式形成，将电芯组件12放入下壳体112后，从电芯组件12的上表面向下壳体112中注入密封胶，从而将电芯组件12密封在下壳体112中。
多个弹性垫14，分别设置在相邻的电芯单元121之间，弹性垫14在上下方向上与电芯单元121相对设置。弹性垫14的外围尺寸与电芯单元121的外围尺寸基本一致，由于电芯单元121在高温或充电过程中，会出现体积膨胀的现象，为了提供足够预留膨胀空间的同时具有较好的散热效果，弹性垫14的中间部分可设置通孔，弹性垫14的上表面与相邻上层电芯单元121的下表面接触，弹性垫14的下表面与相邻下层电芯单元121的上表面接触，从而弹性垫14与相邻上层电芯单元121和相邻下层电芯单元121形成有空气腔152。本实施例中，弹性垫14设置成“回”字型，选用形变可逆的材料制成，同时具有较好的导热效果。本实施例中，弹性垫14可选用海绵材质或其他具备良好散热效果的材质制成。
参照图12和图13所示，电池包还包括透气元件15，用于实现电池包的内 外气压平衡的同时具备防水防尘的功能。透气元件15整体设置于电池包的壳体11内。透气元件15与多个空气腔152连通，同时还与密封件13与下壳体112形成的密封腔(图未示)以外的空气连通。具体地，透气元件15部分设置在电芯组件12侧面，并位于多个空气腔152内。本实施例中，透气元件15设有多个透气引脚端153，每个透气引脚端153与相对应的弹性垫14的上表面或下表面接触，并沿第一方向延伸到相对应的空气腔152内，用于实现密封件13与下壳体112形成的密封腔内外气压平衡。透气元件15还包括设置在电芯组件12侧面的透气主体151，透气主体151与多个透气引脚端153相连。
参见图14至图16所示，透气主体151至少部分位于密封腔外的空气中。图15示出了电池包10的局部剖面图，图中A处所示，透气主体151在上下方向上凸出密封件13的上表面。注意，本实施例中并不限制透气主体151的上表面高出密封件13的上表面的高度，可根据实际设计情况自行选择。
作为另一种可能的实施例，参见图17所示，透气主体151在上下方向上与密封件13齐平。按此设计，透气主体151的上表面可以接触到上述的密封腔以外的空气，同样能实现上述密封腔内外气压的平衡。
作为又一种可能的实施例，参见图18所示，密封件13的上表面不在一个平面内，透气主体151的上表面与密封件13的凹槽处的上表面齐平，按此设计，透气主体151的上表面可以接触到上述的密封腔以外的空气，同样能实现密封腔内外气压的平衡。
本实施例中，透气元件15在装配过程中，透气元件15的透气引脚端153通过胶体固定于相对应的多个弹性垫14的表面，透气元件15的透气主体151通过胶体固定于电芯组件12的侧面，透气元件15和电芯组件12放置入下壳体112后，通过在电芯组件12上表面灌胶的方式，与下壳体112形成一密封腔，将电芯组件12密封在密封腔内。本实施例中的透气元件15不局限于设置在图12所示的电芯组件12的左侧面，可以设置于电芯组件12的前、后、左、右的任何一面或多面。透气元件15选用防水透气纸，具有IPX7的防水等级的同时 具备良好的透气功能。为了提高密封腔内外气压平衡的效果，本实施例中的透气元件15采用厚度范围在0.3mm至4mm之间的防水透气纸。当电池包10在高温存储，或充放电过程中，密封腔中气压因温度的上升而增大，通过透气元件15进行内外气压平衡，从而实现壳体11内密封腔的内外气压平衡，避免出现因密封腔内气压过高而导致壳体11变形的现象，提高了电池包1使用寿命，增强了电池包1的安全性和性能稳定性。
在一些实施例中，由于电芯单元121在高温或充电过程中，会出现体积膨胀的现象，为了提供足够预留膨胀空间的同时具有较好的散热效果，参照图19所示，弹性垫14在左侧或/和右侧设置开口，即不构成完整的“回”字型。
在一些实施实施例中，参见图20所示，下壳体112的内表面上形成或连接有多个分离筋位，包括分离筋位1121、分离筋位1122、分离筋位1123和分离筋位1124。具体地，分离筋位1121和分离筋位1122设置在下壳体112的后端，分离筋位1123和分离筋位1124设置在下壳体112的前端。其中，分离筋位1121与分离筋位1122在前后方向上的间距约为分离筋位1121或分离筋位1122的宽度的两倍。类似的，分离筋位1123与分离筋位1124在前后方向上的间距约为分离筋位1123或分离筋位1124的宽度的两倍。分离筋位1121或分离筋位1122大致位于下壳体112的距离其后端的三分之一处，分离仅为1123或分离筋位1124大致位于下壳体112的距离其前端的三分之一处。本实施例中，分离筋位1121和分离筋位1122之间设置有密封条，分离筋位1123和分离筋位1124之间也设置有密封条。具体地，本实施例中的密封条设置为海绵条。
本实施例中的分离筋位1121、分离筋位1122、分离筋位1123以及分离筋位1124呈U字型设置。当然，在另一些实施例中，以分离筋位1121为例，其在下壳体112的底部上的部分与其在下壳体112的侧部上的部分不在同一平面内，相互错开，其他分离筋位同样按照该方法进行设置，则不再详细描述。
电芯组件12在装配过程中，将电芯组件12放置于壳体11所形成的内腔113中，下壳体112上设置的分离筋位与电芯组件12的下表面以及侧面充分接触， 将装入电芯组件12的内腔113分割成第一部分1131、第二部分1133以及中间部分1132。本实施例中，在上下方向上相对于第一部分1131和第二部分1133的电芯组件12的上表面注入密封胶，对第一部分1131和第二部分1133进行灌胶密封，中间部分1132构成独立透气腔(图中未示出)。当电池包10在高温存储，或充放电过程中，通过弹性垫14实现气压平衡，从而实现密封件13与下壳体112形成的密封腔的内外气压平衡，避免出现因上述密封腔内气压过高而导致壳体11变形的现象，降低成本的同时，简化结构、减少灌胶量、减轻电池包10重量。
接下来将介绍本申请中的用于实现电池包内外气压平衡的其他实施例。
参照图21和图22所示，电池包2包括形成有内腔213的上壳体211和下壳体212。电芯组件22、密封件23以及形变组件24均设置在内腔113中。其中，密封件23与下壳体212形成有一密封腔(图未示)，电芯组件22设置在密封腔内。
形变组件24包括多个形变元件241。形变元件241分别设置在相邻的电芯单元221之间，多个形变元件41在上下方向上与电芯单元221相对设置。具体地，形变元件241的外围尺寸与电芯单元221的外围尺寸基本一致，由于电芯单元221在高温或充电过程中，会出现体积膨胀的现象，为了提供足够预留膨胀空间的同时具有较好的散热效果，多个形变元件241的中间部分可设置通孔，形变元件241的上表面与相邻的上层电芯单元221的下表面接触，形变元件241的下表面与相邻的下层电芯单元221的上表面接触，形变元件241与相邻的上层电芯单元221和相邻的下层电芯单元221形成有空气腔242。具体地，形变元件241可选用形变可逆的材料制成，同时具有较好的导热效果。可选地，形变元件241可选用海绵材质或其他具备良好散热效果的材质制成。另外，此处需要说明的是，本申请中对形变元件的材料并不做限制，也可采用磁性形变或者其他形变方式适配于空气腔242。
由于电池包在高温存储或充放电过程中，密封腔的气压随着温度的上升而 增大，对电芯单元221产生挤压，气体压强挤压电芯单元221向叠放面两侧产生位移，最终挤压壳体产生形变。参照图16所示，电池包2还包括透气装置25，通过设置透气装置25实现密封腔内外气压的平衡。
参照图23至图25所示，透气装置25部分地设置于电芯组件22的侧面。具体地，透气装置25设置在远离电芯单元正极2211或电芯单元负极2212的一侧。本实施例中，透气装置25包括第一元件251、第二元件252以及连接件253。其中，第一元件251设置于电芯组件22的侧面，第一元件251沿前后方向设有一通孔2511，通孔2511的上边界设置在形变组件24的上表面的上方，通孔2511的下边界设置在形变组件24的下表面的下方。具体地，第一元件251通过胶水粘贴于电芯组件22的侧面。第二元件252通过连接件253固定于第一元件251上。本实施例中，第二元件252选用聚碳酸酯(Polycarbonate，PC)材质，连接件253设置为背胶。透气装置25上至少形成有一透气通道254，透气通道254与多个空气腔242连通，并且与上述密封腔外的空气连通，实现电池包2的密封腔的内外气压的平衡。
连接件253沿前后方向设有一通孔2531。具体地，通孔2531的外形尺寸与第一元件251上的通孔2511的外形尺寸基本一致。连接件253沿上下方向在通孔2531上方设置一直槽2532。直槽2532与第一元件251的第一侧面2512和第二元件252的第一侧面2521形成一透气通道254。图26中箭头方向即电池包2中空气流通方向。具体地，电池包2在工作过程中，空气腔242中的空气经过形变元件241、第一元件251的通孔2511、连接件253的通孔2531与透气通道2532连通，从而与上述密封腔外的空气连通，实现电池包2的密封腔内外气压的平衡。
为了进一步提高内外气压平衡的效果，具体地，形变元件241可设置为不完整的“回”字型。参见图25所示，形变元件241在与透气装置25相连的一侧设置一个切口243。空气腔242中的空气经过形变元件241上的切口243、第一元件251的通孔2511、连接件253的通孔2511，再经过透气通道245与上述 密封腔外的空气连通，从而实现电池包2的密封腔内外气压的平衡。具体地，由于连接件253设置为背胶，为了达到较好的气压平衡效果，背胶的厚度可选地设置在大于等于0.05mm且小于等于1mm的范围内。本实施例中连接件253也可以直接设置在第一元件251或者第二元件252上。透气装置25在装配过程中，直接将第一元件251与第二元件252进行组装。
当然，由于本实施例中的形变元件241具有良好透气性能，因此，形变元件241也可设置为如图27所示的形状，空气腔242中的空气经过形变元件241、第一元件251的通孔2511、连接件253的通孔2531，再经过透气通道254与密封腔外的空气连通，从而实现电池包2的密封腔内外气压的平衡。
在一些实施例中，透气装置35还具有其他的实现方式。具体而言，参照图28至图29所示，第一元件351形成有通孔3512，第一元件351的第一侧面522形成有沿上下方向延伸的直槽3511。其中，直槽3511与通孔3512连通且位于通孔3512的上方。本实施例中，直槽3511的深度不超过第一元件351的厚度。直槽3511与连接件353的第一侧面3531构成透气通道354。空气腔中的空气经过第一元件351的通孔3512，再经过透气通道354与密封腔外的空气连通，实现电池包的密封腔内外气压的平衡。为了更好地实现电池包中密封腔的内外气压的平衡效果，第一元件351可选地设置为改性聚丙烯(Modified Propylene Polymer，MPP)材质或橡胶材质，第一元件351的厚度可选地设置在大于等于2mm且小于等于10mm的范围内。此处需要说明的是，直槽3511的深度以及宽度，可依照具体使用环境设置。
本实施例中的第一元件351、第二元件352以及连接件353与上述的实施例中的安装方式一致，此处不再赘述。
在一些实施例中，参照图30至图31所示，第一元件451形成有第一通孔4512，第一元件451还形成有沿上下方向延伸的第二通孔4511。其中，第二通孔4511位于第一通孔4512的上方，并与第一通孔4512连通，用于形成透气通道454。在本实施例中的第二通孔4511即构成透气通道454。空气腔中的空气 经过第一元件451的第一通孔4512，再经过透气通道454与上述密封腔外的空气连通，实现电池包的密封腔内外气压的平衡。具体地，第一元件451设置为MPP材质，第一元件451的厚度设置在大于等于2mm且小于等于10mm的范围内。此处需要说明的是，第二通孔4511的直径依照电池包具体使用环境进行设置。
本实施例中的第一元件451、第二元件3452以及连接件453与上述的实施例中的安装方式一致，此处不再赘述。
在一些实施例中，参照图32至图33所示，第一元件551形成有沿前后方向延伸的第一通孔5511，连接件553形成有沿前后方向延伸的第二通孔5531.其中，第一通孔5511和第二通孔5531连通且尺寸大致相同。第二元件552形成有沿上下方向设置的凹槽5521。凹槽5521与连接件553的前侧面5532形成一透气通道554。空气腔中的空气经过第一元件551的第一通孔5511、连接件553的第二通孔5531，再经过透气通道554与上述密封腔外的空气连通，实现电池包的密封腔内外气压的平衡。本实施例中的第二元件552设置为PC材质，第二元件552的厚度设置在大于等于0.5mm且小于等于2mm的范围内。此处需要说明的是，凹槽5521的深度可依照电池包具体使用环境进行设置。
本实施例中的第一元件551、第二元件553以及连接件552与上述的实施例中的安装方式一致，此处不再赘述。
注意，上述例举的实施例中的透气装置在电池包上下方向上均高于密封件的上表面。可以理解，透气装置也设置为在上下方向上齐平于或低于密封件的上表面，其不同之处在于对电池包中的电芯单元进行密封灌胶时，需要采用特殊处理使得透气通道可以与电池包中密封腔外的空气连通。
上述的实施例中的电池包通过透气装置上的透气通道，实现电池包的密封腔的内外气压平衡。保证电池包在高温存储或充放电过程中，密封腔的气压不会随着温度的上升而明显增大，提高了电池包的安全性能。上述实施例中的透气装置的结构以及装配工艺简单，且成本低，易于实现。

Claims (61)

  1. 一种电池包，设置为给电动工具供电，所述电池包包括：
    壳体；
    电芯组件，设置在所述壳体内，所述电芯组件包括多个层叠排布的电芯单元；
    弹性垫，所述弹性垫分别设置在相邻的所述电芯单元之间；所述弹性垫与相邻的所述电芯单元之间形成有空气腔；
    密封件，至少设置在所述电芯组件的表面，所述密封件与所述壳体形成有一密封腔；
    透气元件，部分设置于所述电芯组件的侧面，并沿第一方向延伸至多个所述空气腔内；所述透气元件与所述密封腔外的空气连通。
  2. 根据权利要求1所述的电池包，其中，
    所述透气元件包括透气主体和多个透气引脚端，多个所述透气引脚端与所述透气主体相连。
  3. 根据权利要求2所述的电池包，其中，
    所述透气主体设置于所述电芯组件的侧面，所述透气引脚端的至少部分位于所述空气腔内。
  4. 根据权利要求3所述的电池包，其中，
    所述透气主体的上表面高于所述密封件的上表面。
  5. 根据权利要求3所述的电池包，其中，
    所述透气主体的上表面与所述密封件的上表面齐平。
  6. 根据权利要求3所述的电池包，其中，
    所述密封件的上表面形成有一凹槽，所述透气主体的上表面与所述凹槽所在的所述密封件的上表面齐平。
  7. 根据权利要求1所述的电池包，其中，
    所述透气元件由防水透气材质制成。
  8. 根据权利要求7所述的电池包，其中，
    所述透气元件的厚度大于0.3mm且小于4mm。
  9. 根据权利要求1所述的电池包，其中，
    所述弹性垫设置为形变可逆的材料。
  10. 根据权利要求9所述的电池包，其中，
    所述弹性垫设置为导热材料或包含导热部件。
  11. 根据权利要求10所述的电池包，其中，
    所述弹性垫的靠近所述透气元件的一侧形成有一开口，所述开口中的空气与所述空气腔中的空气连通。
  12. 根据权利要求1所述的电池包，其中，
    所述壳体包括上壳体和下壳体，所述密封件与所述下壳体形成所述密封腔，所述电芯组件设置于所述密封腔内。
  13. 根据权利要求12所述的电池包，其中，
    所述下壳体的内表面上形成有分离筋位，所述分离筋位将所述密封腔分割成第一部分、第二部分和中间部分。
  14. 根据权利要求13所述的电池包，其中，
    所述第一部分位于所述密封腔的靠近所述电芯组件的后端的一侧，所述第二部分位于所述密封腔的靠近所述电芯组件的前端的一侧。
  15. 根据权利要求14所述的电池包，其中，
    所述中间部分在上下方向上与多个所述空气腔相对设置。
  16. 一种电池包，设置为给电动工具供电，所述电池包包括：
    壳体；
    电芯组件，设置在所述壳体内，所述电芯组件包括多个层叠排布的电芯单元；
    弹性垫，所述弹性垫分别设置在相邻的所述电芯单元之间；所述弹性垫与相邻的所述电芯单元之间形成有空气腔；
    密封件，至少设置在所述电芯组件的表面，所述密封件与所述壳体形成有 一密封腔；
    透气元件，所述透气元件与所述空气腔连通；所述透气元件与所述密封腔外的空气连通。
  17. 根据权利要求16所述的电池包，其中，
    所述透气元件包括透气主体和多个透气引脚端，多个所述透气引脚端与所述透气主体相连。
  18. 一种电动工具，包括用于为所述电动工具进行供电的电池包，
    所述电池包包括：
    壳体；
    电芯组件，设置在所述壳体内，所述电芯组件包括多个层叠排布的电芯单元；
    弹性垫，所述弹性垫分别设置在相邻的所述电芯单元之间；所述弹性垫与相邻的所述电芯单元之间形成有空气腔；
    密封件，至少设置在所述电芯组件的表面，所述密封件与所述壳体形成有一密封腔；
    透气元件，部分设置于所述电芯组件的侧面，并沿第一方向延伸至多个所述空气腔内；所述透气元件与所述密封腔外的空气连通。
  19. 根据权利要求18所述的电动工具，其中，
    所述透气元件包括透气主体和多个透气引脚端，多个所述透气引脚端与所述透气主体相连。
  20. 根据权利要求19所述的电动工具，其中，
    所述透气主体设置于所述电芯组件的侧面，所述透气引脚端的至少部分位于所述空气腔内。
  21. 一种电池包，设置为给电动工具供电，所述电池包包括：
    壳体；
    电芯组件，位于所述壳体内，所述电芯组件包括电芯组件正极端子和电芯 组件负极端子；
    电池包接口，设置于所述壳体的表面；
    电池包端子，位于所述电池包接口中，所述电池包端子包括电池包充电端子和电池包放电端子；
    所述电池包充电端子经过所述电池包的充电路径与所述电芯组件正极端子或所述电芯组件负极端子电性相连；
    所述电池包放电端子经过所述电池包的放电路径与所述电芯组件正极端子或所述电芯组件负极端子电性相连；
    保护元件，所述保护元件同时设置于所述充电路径和所述放电路径中。
  22. 根据权利要求21所述的电池包，还包括充电连接片和放电连接片，所述充电连接片设置于所述充电路径中，所述放电连接片设置于所述放电路径中。
  23. 根据权利要求22所述的电池包，其中，
    所述充电连接片通过电路板与所述电池包充电端子电性连接。
  24. 根据权利要求23所述的电池包，其中，
    所述放电连接片与所述电池包放电端子电性连接。
  25. 根据权利要求24所述的电池包，其中，
    所述保护元件的前端设置为与所述电芯组件正极端子或所述电芯组件的负极端子电性连接。
  26. 根据权利要求25所述的电池包，其中，
    所述保护元件的后端与所述充电连接片电性连接。
  27. 根据权利要求26所述的电池包，其中，
    所述保护元件的后端与所述充电连接片之间通过导线电性连接。
  28. 根据权利要求21所述的电池包，其中，
    所述保护元件设置为插片式保险丝，裹敷式保险丝，贴片式保险丝中的一种。
  29. 根据权利要求22所述的电池包，其中，
    所述充电连接片和所述放电连接片为导电材质。
  30. 根据权利要求21所述的电池包，其中，
    所述电芯组件包括多个电芯单元。
  31. 根据权利要求21所述的电池包，其中，
    所述充电路径与所述放电路径不同。
  32. 一种电动工具，包括如权利要求书21-31任意一项所述的电池包。
  33. 一种电池包，设置为给电动工具供电，所述电池包包括：
    壳体，包括上壳体和下壳体；
    电芯组件，设置在所述壳体内；
    支撑板，设置在所述上壳体与所述下壳体之间；
    电路板，固定在所述支撑板的上表面；
    端子组件，部分固定于所述支撑板的上表面，
    所述端子组件包括：
    多个电池包端子，所述电池包端子包括端子夹持部和端子极片；
    端子支撑座，用于固定所述电池包端子；
    所述端子组件还包括，
    端子保护装置，固定于所述端子支撑座，所述端子保护装置形成有多个容纳空间，多个所述容纳空间之间相互独立。
  34. 根据权利要求33所述的电池包，其中，
    多个所述电池包端子分别位于多个所述容纳空间内。
  35. 根据权利要求34所述的电池包，其中，
    所述容纳空间的内表面与所述端子夹持部之间设有间隙。
  36. 根据权利要求35所述的电池包，其中，
    所述间隙可适配所述端子夹持部发生可逆弹性形变。
  37. 根据权利要求33所述的电池包，其中，
    所述端子保护装置形成有沿前后方向延伸的直槽，所述直槽在上下方向上 与所述端子夹持部相对设置。
  38. 根据权利要求33所述的电池包，其中，
    所述端子极片与所述电路板之间通过导线实现电性连接。
  39. 根据权利要求33所述的电池包，其中，
    所述端子保护装置设置为塑胶材质；
    所述端子保护装置设置为绝缘材质。
  40. 根据权利要求33所述的电池包，其中，
    所述电芯组件包括多个电芯单元。
  41. 一种电动工具，包括如权利要求书33-40任意一项所述的电池包。
  42. 一种电池包，设置为给电动工具供电，所述电池包包括：
    壳体；
    电芯组件，设置在所述壳体内，所述电芯组件包括多个层叠排布的电芯单元；
    弹性组件，所述弹性组件包括多个弹性垫，多个所述弹性垫分别设置在相邻的所述电芯单元之间；多个所述弹性垫与相邻的所述电芯单元形成有多个空气腔；
    密封件，至少设置在所述电芯组件的表面，所述密封件与所述壳体形成有一密封腔；
    透气装置，部分设置于所述电芯组件的侧面；
    所述透气装置包括第一元件、第二元件以及连接件，所述第一元件与所述第二元件之间通过连接件固定；
    所述连接件连接或形成有透气通道；所述透气通道与多个所述空气腔连通；所述透气通道与所述密封腔外空气连通。
  43. 根据权利要求42所述的电池包，其中，
    所述第一元件部分设置于所述电芯组件的侧面。
  44. 根据权利要求42所述的电池包，其中，
    所述弹性垫设置为形变可逆的材料。
  45. 根据权利要求42所述的电池包，其中，
    所述弹性垫设置为导热材料或包含导热部件。
  46. 根据权利要求42所述的电池包，其中，
    所述电芯组件设置于所述密封腔内。
  47. 根据权利要求46所述的电池包，其中，
    所述密封件通过灌胶工艺形成。
  48. 根据权利要求42所述的电池包，其中，
    所述第二元件设置为聚碳酸酯PC材质。
  49. 根据权利要求48所述的电池包，其中，
    所述连接件的厚度范围设置为大于或等于0.05mm且小于或等于1mm。
  50. 根据权利要求49所述的电池包，其中，
    所述连接件设置为背胶。
  51. 一种电动工具，包括如权利要求书42-50任意一项所述的电池包。
  52. 一种电池包，设置为给电动工具供电，所述电池包包括：
    壳体；
    电芯组件，设置在所述壳体内，所述电芯组件包括多个层叠排布的电芯单元；
    形变组件，所述形变组件包括多个形变元件，多个所述形变元件分别设置在相邻的所述电芯单元之间；多个所述形变元件与相邻的所述电芯单元形成有多个空气腔；
    密封件，至少设置在所述电芯组件的表面，所述密封件与所述壳体形成有一密封腔；
    透气装置，部分设置于所述电芯组件的侧面；
    所述透气装置至少包括第一元件、第二元件，所述第一元件与所述第二元件之间通过连接件固定；
    所述第一元件或所述第二元件上形成或连接有至少一个透气通道；
    所述透气通道与多个所述空气腔连通或通过所述形变组件与多个所述空气腔连通；所述透气通道与所述密封腔外的空气连通。
  53. 根据权利要求52所述的电池包，其中，
    所述第一元件部分设置于所述电芯组件的侧面。
  54. 根据权利要求52所述的电池包，其中，
    所述形变元件的形变设置为适配所述空气腔。
  55. 根据权利要求54所述的电池包，其中，
    所述形变元件设置为导热材料或包含导热部件。
  56. 根据权利要求55所述的电池包，其中，
    所述形变元件设置为透气材料。
  57. 根据权利要求52所述的电池包，其中，
    所述电芯组件设置于所述密封腔内。
  58. 根据权利要求52所述的电池包，其中，
    所述密封件通过灌胶工艺形成。
  59. 根据权利要求52所述的电池包，其中，
    所述第一元件设置为改性聚丙烯MPP材质。
  60. 根据权利要求59所述的电池包，其中，
    所述第二元件设置为聚碳酸酯PC材质。
  61. 一种电动工具，包括如权利要求书52-60任意一项所述的电池包。
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