CN112117401A - Electric tool and battery pack thereof - Google Patents
Electric tool and battery pack thereof Download PDFInfo
- Publication number
- CN112117401A CN112117401A CN201910829490.9A CN201910829490A CN112117401A CN 112117401 A CN112117401 A CN 112117401A CN 201910829490 A CN201910829490 A CN 201910829490A CN 112117401 A CN112117401 A CN 112117401A
- Authority
- CN
- China
- Prior art keywords
- battery
- cell
- battery pack
- battery cell
- assembly
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Images
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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
-
- 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
- H01M10/0436—Small-sized flat cells or batteries for portable equipment
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
-
- 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
- H01M10/647—Prismatic or flat cells, e.g. pouch cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/654—Means for temperature control structurally associated with the cells located inside the innermost case of the cells, e.g. mandrels, electrodes or electrolytes
-
- 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
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biophysics (AREA)
- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides an electric tool, which comprises a tool main body and a battery pack, wherein the battery pack supplies power to the tool main body; the battery pack includes: a housing; the electric core assembly is arranged in the shell; a cell support at least for supporting a cell assembly; wherein, electric core subassembly includes: the battery comprises a plurality of sheet-shaped battery cells, a plurality of battery cells and a plurality of battery cells, wherein the plurality of sheet-shaped battery cells are arranged in a stacked manner; the battery cell comprises a packaging part, and the packaging part is used for packaging the battery cell; the lugs are arranged at two ends of the battery cell assembly and protrude out of the battery cell; the battery cell supporting pieces are arranged at two ends of the battery cell assembly, at least part of the battery cell supporting pieces encapsulate the tabs, and the heat conductivity coefficient of the battery cell supporting pieces is more than or equal to 0.6W/(m.k). The invention provides an electric tool and a battery pack thereof, which have better heat dissipation effect and safety performance.
Description
Technical Field
The invention relates to an electric tool and a battery pack thereof.
Background
Based on the use requirement of portability, more and more electric tools adopt a battery pack as a power source.
The existing battery pack for supplying power to the electric tool mainly adopts cylindrical lithium cells, and the plurality of cylindrical lithium cells are connected in series and parallel to ensure sufficient electric energy output so as to improve the cruising ability of the electric tool.
However, the battery pack accumulates a large amount of heat during a long-term use, and the battery packs are compactly packaged in the shell of the battery pack, so that the heat is difficult to dissipate, and when the heat is accumulated to a certain degree, the discharging or charging capacity of the battery pack is changed, and the service life and the stability of the battery pack are further influenced, so that potential safety hazards are caused. Therefore, when the electric tool adopting the existing battery pack is used, potential safety hazards caused by heat accumulation of the battery pack also exist.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide an electric tool and a battery pack thereof, which have better heat dissipation effect and safety performance.
In order to achieve the above object, the present invention adopts the following technical solutions:
a battery pack, comprising: a housing; an electrical core assembly disposed within the housing; a cell support at least for supporting the cell assembly; wherein, the electric core subassembly includes: the battery comprises a plurality of sheet-shaped battery cells, a plurality of battery cells and a plurality of battery cells, wherein the plurality of sheet-shaped battery cells are stacked and arranged; the battery cell comprises a packaging part, and the packaging part is used for packaging the battery cell; the lugs are arranged at two ends of the battery cell assembly and protrude out of the battery cell; the battery cell supporting pieces are arranged at two ends of the battery cell assembly, at least part of the battery cell supporting pieces encapsulate the tabs, and the heat conductivity coefficient of the battery cell supporting pieces is greater than or equal to 0.6W/(m.k).
Preferably, the cell support member is an elastic member with a compression rate greater than 50%.
Preferably, the cell support member is an elastic member having an elongation at break greater than or equal to 100.
Preferably, the support member is an elastic member having a tensile strength of 0.9N/mm or more.
Preferably, the battery pack further includes: the circuit board is electrically connected with the lug; the distance between the lower surface of the circuit board and the upper surface of the battery pack is greater than or equal to 5 mm.
Preferably, the battery pack further includes: and the buffer piece surrounds along the outer surface of the electric core assembly so as to fix the electric core assembly. Preferably, the battery pack further includes: the buffer layer is arranged between the adjacent battery cells; the material of the buffer layer is the same as that of the cell support piece.
Preferably, the battery pack further includes: and the elastic adhesive tape is wound along the outer surface of the electric core assembly to fix the electric core assembly.
Preferably, the cell supports are formed at two ends of the cell assembly in a glue injection manner.
Preferably, the battery pack further includes: the temperature sensor is used for detecting the temperature of the battery cell; the temperature sensor is arranged on one side, close to the battery cell supporting piece, of the battery cell lug.
Preferably, the power tool comprises a battery pack, wherein the battery pack is used for providing electric energy for the power tool; the battery pack includes: a housing; an electrical core assembly disposed within the housing; a cell support at least for supporting the cell assembly; wherein, the electric core subassembly includes: the battery comprises a plurality of sheet-shaped battery cells, a plurality of battery cells and a plurality of battery cells, wherein the plurality of sheet-shaped battery cells are arranged in a stacked manner; the battery cell comprises a packaging part, and the packaging part is used for packaging the battery cell; the lugs are arranged at two ends of the battery cell assembly and protrude out of the battery cell; the battery cell supporting pieces are arranged at two ends of the battery cell assembly, at least part of the battery cell supporting pieces encapsulate the tabs, and the heat conductivity coefficient of the battery cell supporting pieces is greater than or equal to 0.6W/(m.k).
Preferably, the cell support piece is an elastic piece with a compression rate of more than 50%; the cell support piece is an elastic piece with the elongation at break larger than or equal to 100; the supporting piece is an elastic piece with the tensile strength of more than or equal to 0.9N/mm.
Preferably, the battery pack further includes: the circuit board is electrically connected with the lug; the distance between the lower surface of the circuit board and the upper surface of the battery pack is greater than or equal to 5 mm.
Preferably, the battery pack further includes: and the buffer piece surrounds along the outer surface of the electric core assembly so as to fix the electric core assembly.
Preferably, the battery pack further includes: the buffer layer is arranged between the adjacent battery cells; the material of the buffer layer is the same as that of the cell support piece.
Preferably, the battery pack further includes: and the elastic adhesive tape is wound along the outer surface of the electric core assembly to fix the electric core assembly.
Preferably, the cell supports are formed at two ends of the cell assembly in a glue injection manner.
Preferably, the battery pack further includes: the temperature sensor is used for detecting the temperature of the battery cell; the temperature sensor is arranged on one side, close to the battery cell supporting piece, of the battery cell lug.
The battery pack has the beneficial effects that by adopting the technical scheme, the heat dissipation performance of the battery pack can be improved, the reliability of the battery is improved, and the service life of the battery is prolonged.
Drawings
FIG. 1 is a schematic view of a battery pack and power tool;
fig. 2 is a structural view of a battery pack as one of the embodiments;
fig. 3 is a schematic view of the internal structure of the battery pack shown in fig. 1 with the case removed;
fig. 4 is a schematic structural view of the battery pack shown in fig. 2 with the first support member removed;
fig. 5 is a schematic view of an internal structure of a battery pack removal case according to an embodiment;
fig. 6 is a schematic structural view of a battery pack including a buffer member according to an embodiment;
fig. 7 is a schematic structural view of a battery pack including a buffer member according to an embodiment;
fig. 8 is a schematic structural view of a battery pack including an elastic adhesive tape according to an embodiment;
FIG. 9 is a graph showing a temperature rise test of a battery pack and a cylindrical lithium battery pack according to one embodiment;
fig. 10 is a graph showing a temperature rise test of a battery pack with or without a support member according to an embodiment;
fig. 11 is a block diagram of a protection circuit for a battery pack as one embodiment;
FIG. 12 is a schematic view of the position of a pressure sensor as an embodiment;
fig. 13 is a block diagram of a protection circuit for a battery pack as another embodiment;
FIG. 14 is a schematic view of the position of a gas sensor as an embodiment;
fig. 15 is a block diagram of a protection circuit for a battery pack as another embodiment;
fig. 16 is a discharge curve diagram of a battery pack and a cylindrical lithium battery pack as one of examples;
FIG. 17 is a schematic view of a battery pack and a hand propelled snow sweeper;
fig. 18 is a graph showing a low-temperature discharge curve of a battery pack and a cylindrical lithium battery pack as one of examples;
FIG. 19 is a graph showing mechanical properties of a lawnmower according to one embodiment.
Detailed Description
The invention is described in detail below with reference to the figures and the embodiments.
Fig. 1 shows a power tool 20 and a battery pack 10 that can be adapted to power the power tool. In fig. 1, the power tool 20 is a power drill. While the present embodiment is directed to a power drill, it should be understood that the present application is not limited to the disclosed embodiments, but is applicable to other types of power tools, including, but not limited to, power hammers 30, sanders 40, angle grinders, power drills, power wrenches, power saws.
The electric power tool 20 includes a tool main body 201, and a tool interface 2011 and a tool fitting portion 2012 provided on the tool main body 201, and the battery pack 10 is provided with a battery pack interface 101 and a battery pack coupling portion 102. The battery pack interface 101 is used to adapt the tool interface 2011 to power the power tool. The battery pack coupling part 102 is detachably connectable to the tool fitting part 2012 so that the battery pack 10 can supply power to the power tool 20.
In the following description, the vertical and longitudinal directions are described using the directions indicated by the arrows in fig. 2.
Referring to fig. 2 to 4, the battery pack 10 includes a housing 11, a circuit board 12, a cell assembly 13 and a cell support member 14.
The housing 11 includes an upper housing 111 and a lower housing 112. The upper case 111 and the lower case 112 are assembled to form a receiving space for fixing and receiving the electric core assembly 13. A battery pack interface 101 is formed on one surface of the housing 11, and the battery pack interface 101 includes a power supply positive interface 1011, a power supply negative interface 1012, and a power supply communication interface 1013. The battery pack 10 provides electric energy for the electric tool through a positive power interface 1011 and a negative power interface 1012; and communicates with the power tool 20 through the power source communication interface 1013.
The electric core assembly 13 is disposed in an accommodating space formed by the housing 11. The cell assembly 13 includes one or more sheet-shaped cells 131, and the plurality of sheet-shaped cells 131 are stacked and arranged. In some embodiments, the sheet-shaped battery cells 131 are flat, and the battery cells are stacked up and down. In other embodiments, the cells 131 may be curved in an arc shape. The cell 131 also includes a package 1311, the package 1311 being used to package the cell to prevent leakage of compounds within the cell. In some specific embodiments, the package 1311 may be, but is not limited to, an aluminum plastic film.
Each cell 131 further includes a tab 132, and the tab 132 is disposed at least one end of the cell assembly 13 and protrudes from the cell. The electric core assembly 13 has an upper surface and a lower surface, a first end surface and a second end surface provided between the upper surface and the lower surface, and a first side surface and a second side surface provided on both sides of the first end surface. Wherein the first end face and the second end face are oppositely arranged. The tab 132 can be arranged on the left end surface 133 of the electric core assembly 13 or on the right end surface 134 of the electric core assembly 13; or some tabs 132 are distributed on the left end face 133 of the core assembly, and other tabs are distributed on the right end face 134; there may also be distributed tabs 132 on at least one or several faces, without limitation. In some embodiments, the cell tabs 132 are connected in series, and in other embodiments, the cell tabs 132 may be connected in series and then connected in parallel with other cell tabs. In some embodiments, the cell tabs 132 are connected to the circuit board by cables, and the connection between the cells is performed in the associated circuitry of the circuit board. In other embodiments, the tabs 132 are connected by a connecting plate or an adaptor plate.
The circuit board 12 is located between the upper shell 111 and the electric core assembly 13, and is electrically connected to the electric core assembly 13. The circuit board 12 includes a battery pack terminal 121, a power management module (not shown). The power management module is configured to perform power management on the battery pack 10 to implement charging and discharging management of the battery pack 10. The battery pack terminal 121 is located in the battery pack interface 101 to output power of the battery pack 10. The battery pack terminal 121 includes a battery pack positive terminal 1211, a battery pack negative terminal 1212, and a battery pack communication terminal 1213. The battery pack positive terminal is located in the power supply positive interface 1011 and the battery pack negative terminal 1212 is located in the power supply negative interface 1012 to power the power tool 20 that is coupled to the battery pack interface 101. The battery pack communication terminal 1213 is located in the power supply communication interface 1013 to communicate with the electric power tool 20 that is connected to the battery pack interface 101.
In some embodiments, the battery pack terminal 121 and the tab 132 are connected to output the electric energy of the battery pack 10, and the circuit board 12 is connected to the positive and negative electrodes of the core assembly 13 and the positive and negative electrodes of the battery cell 131; referring to fig. 4, a tab 132 is provided on a left end surface 133 of the electric core assembly, the tab 132 connects the positive electrode line 124 and the negative electrode line 125, and the electric power of the battery pack 10 is output to the electric device through the tab 132, the positive and negative electrode lines 124 and 125, and the pack terminal 121. In other embodiments, the tab 132 is connected to the circuit board, and the power of the battery pack 10 is output to the power tool 20 through the circuit board 12 and the battery pack terminal 121. Spot welding, line welding or surface welding is adopted between the battery cell 131 and the lead and between the battery cells. Preferably, the welding is performed using an ultrasonic welding, or laser welding apparatus.
Cell supports 14 are disposed at both ends of the cell assembly 13, and at least a portion of the cell supports 14 encapsulate the tabs 132. In some embodiments, the cell support 14 includes a first support 141 and a second support 142, the first support 141 is located on the left end surface 133 of the cell assembly, and the left end surface 133 is a surface on which the tab 132 is provided on the cell assembly 13. The second support member 142 is disposed on the right end 134 of the electrical core assembly, and the right end 134 and the left end 133 are opposite to each other. The cell support member 14 fixes the tab 132 in an encapsulated manner. Utmost point ear 132 spreads out the inside heat of electricity core fast, and the electricity core subassembly spreads out inside heat fast through a plurality of utmost point ears. Because the cell supporting piece has a certain heat conductivity coefficient (the heat conductivity coefficient is greater than or equal to 0.6W/(m.k)), and the cell supporting piece encapsulates the tab, the heat of the cell assembly is quickly led out through the cell supporting piece in contact with the tab, and the heat dissipation effect is improved.
In some embodiments, the cell support members 14 may extend from the left and right end faces 133 and 134 of the cell assembly 13 to the upper, lower, first and second sides of the cell assembly 13 until the cell assembly is completely covered and fixed by the cell support members. In other embodiments, the cell support members 14 are wrapped on the left side surface 133, the right side surface 134, the upper surface and the lower surface of the cell assembly 13, or the cell support members 14 are wrapped on the left side surface 133, the right side surface 134, the first side surface and the second side surface of the cell assembly 13. The cell supporting members 14 are formed at two ends of the cell assembly 13 in a glue injection manner. Specifically, the cell assembly 13 is placed in a mold, supporting members are formed on the left end face 133 and the right end face 134 of the cell assembly in a glue injection manner, and then the cell assembly 13 and the molded cell supporting member 14 are taken out as a whole.
In some embodiments, the cell support members 14 are formed on the outer surface of the entire cell assembly 13 in a glue injection manner. Specifically, place electric core subassembly 13 in the mould, adopt the injecting glue mode to form supporting component at whole electric core subassembly 13's surface, take out electric core subassembly and fashioned supporting component as a whole again.
The cell support member 14 is a solid-state insulating elastic member, and the compression rate of the cell support member 14 is greater than or equal to 50%. The cell support piece is an elastic piece with the elongation at break larger than or equal to 100 and the tensile strength larger than or equal to 0.9N/mm. The cell support member 14 has a thermal conductivity greater than or equal to 0.6W/(m · k).
The cell support member 14 is used for supporting the cell assembly 13, and preventing the cells 131 from being displaced relatively due to bumping or vibration, so as to avoid the extrusion or twisting of the cells 131 or the tabs 132; therefore, the cell support member 14 can improve the anti-falling and shock-absorbing performance of the battery pack 10, and further improve the reliability of the battery pack 10; and the cell support members 14 are elastic members that better accommodate the swelling properties of the battery pack 10. Moreover, the cell support members 14 can also improve the heat dissipation performance of the battery pack 10. The following detailed description will be given with reference to the embodiments.
In some embodiments, the weight energy density of the battery pack 10 shown in fig. 1 ranges from 300wh/kg to 3500wh/kg for the electric core assembly 13. Optionally, the value range of the weight energy density of the electric core assembly 13 is 1000 wh/kg-3500 wh/kg. Optionally, the value range of the weight energy density of the electric core assembly 13 is 2600 wh/kg-3500 wh/kg. Optionally, the value range of the weight energy density of the electric core assembly 13 is 2600 wh/kg-3000 wh/kg. Optionally, the value range of the weight energy density of the electric core assembly 13 is 300 wh/kg-500 wh/kg. Optionally, the value range of the weight energy density of the electric core assembly 13 is 400 wh/kg-600 wh/kg.
Referring to fig. 5, the battery pack 10 further includes a circuit board support 123, and the circuit board support 123 is disposed between the circuit board 12 and the electric core assembly 13 to support the fixed circuit board. The distance between the lower surface of the circuit board 12 and the upper surface of the electric core assembly 13 is greater than or equal to 5 mm. Set up circuit board support piece or predetermine certain distance between the upper surface of electric core subassembly 13 and circuit board 12, can reduce the influence that electric core subassembly 13 generates heat to circuit board 12 to make battery package 10 normally work.
Referring to fig. 6, the battery pack 10 further includes a buffer member 15, and the buffer member 15 is wound along the upper surface, the first side, the lower surface, and the second side of the electric core assembly to fix the electric core assembly 13. The buffer piece is made of foam. The foam may be a polyethylene foam, but is not limited to the polyethylene foam. The buffer member 15 may be another elastic member having a buffering function. The buffer member 15 is wound along the surface of the electric core assembly to support, position and prevent the battery pack 10 from falling.
In other embodiments, as shown in fig. 7, a buffer layer 15' is also disposed between the battery cells 131. A buffer layer 15' is disposed between adjacent cells 131. The material of the buffer layer 15 'is the same as that of the cell support member 14, specifically, the buffer layer 15' is an elastic material, the compression rate of the elastic material is greater than or equal to 50%, the elongation at break is greater than or equal to 100, the tensile strength is greater than or equal to 0.9N/mm, and the thermal conductivity is greater than or equal to 0.6W/(m · k). Set up buffer layer 15 'between electric core and be used for improving the anti-falling shock attenuation performance of battery package 10, and then improve the reliability of battery package 10, and buffer layer 15' is the inflation nature of the better adaptation battery package of elastic component ability. Moreover, the buffer layer 15' can also make the cell temperature distribution uniform, and improve the heat dissipation performance of the battery pack 10. In some embodiments, the buffer layer 15' is formed between the cells by injecting glue and is integrally formed with the cell support member 14.
Referring to fig. 8, in some embodiments, elastic tapes 151 are wound around the upper surface, the first side, the lower surface and the second side of the electric core assembly to bind the electric core assembly 13 together, and such elastic tapes 151 also serve to support the electric core assembly 13. In some cases, the electric core assembly 13 is taken out of the housing 11 for charging, and after charging, the electric core assembly 13 will have a certain expansion, and if the expansion is too large, the electric core assembly 13 cannot be installed into the housing 11, and cannot be used continuously. Therefore, the danger of the battery pack 13 being used after too much charge expansion can be avoided by winding the elastic adhesive tape 151 on the battery pack 13. In some embodiments, the elastic tape 151 may also be wound around the left end surface 133, the right end surface 134, the upper surface, and the lower surface of the core assembly 13, and may also be wound around the left end surface 133, the right end surface 134, the first side surface, and the second side surface of the core assembly 13 to cover the tab 132 and bind the core assembly 13 together, such elastic tape 151 also has a function of supporting the core assembly 13, so as to prevent the cells 131 from being relatively displaced due to bumping or vibration, and avoid the phenomenon of squeezing or twisting of the cells 131 or the tab 132; the anti-falling and shock-absorbing performance of the battery pack 10 is improved, and the reliability of the battery pack 10 is further improved; the elastic tape 151 is an elastic member that can better adapt to the swelling property of the battery pack 10.
Table 1 shows a 3m drop test data table of the battery pack 10.
TABLE 1
Before the drop test, the voltage of the battery pack 10 is measured and recorded to be 21V, the internal resistance is 16.0 m omega, the surface temperature of the battery pack 10 is not abnormal within 2h after 6 times of drop test, the voltage and the internal resistance are measured again, the voltage is 20.855V, and the internal resistance is 16.1m omega. After the drop test, the voltage and the internal resistance of the battery pack 10 were hardly changed.
As can be seen from table 1, in the battery pack 10 having the cell support members 14, the cell support members 14 provide better supporting and positioning for the battery pack 10, and the anti-falling and shock-absorbing effects of the battery pack 10 are improved.
Refer to fig. 9 which is a graph comparing a temperature rise test curve of the battery pack 10 with that of the conventional cylindrical lithium battery pack. The temperature rise of the two battery packs was compared by 40A constant current discharge. After constant current discharge for 600s, the maximum temperature of the cylindrical lithium battery pack reaches 83.15 ℃, and the maximum temperature of the battery pack 10 is 52.15 ℃. In the process, the average output voltage of the cylindrical lithium battery pack is 48V; the average output voltage of the battery pack was 50.3V.
Therefore, the battery pack 10 has better heat dissipation performance compared to the conventional cylindrical lithium battery pack, and the cell package member 1311 facilitates heat dissipation of the battery pack 10; and the average voltage output by the battery pack 10 is higher than that of a cylindrical lithium battery pack by 2.3V, i.e., the output power is higher under the same load current.
Referring to fig. 10, the temperature rise test was performed on the battery pack 10, and samples were prepared as follows, sample 1, sample 2, and sample 3 being a battery pack without a support member, a battery pack with a support member entirely covering, and a battery pack with a support member laterally covering, respectively. The temperature rise test procedure was as follows: charging samples 1, 2 and 3 to 21V at a constant current of 2℃ (C is a charge-discharge multiplying factor) at a temperature of 25 +/-2 ℃, then charging to a current of 0.02C at a constant voltage of 21V, and standing for 1 hour; samples 1, 2 and 3 were then discharged to 15V at a constant current of 10C and after standing for 1 hour, the temperature was measured. At this time, the temperature of sample 1 was 66.7 ℃, the temperature of sample 2 was 57.9 ℃ and the temperature of sample 3 was 63.5 ℃.
As can be seen from fig. 10, the battery pack 10 with the cell support members 14 has better heat dissipation performance, and the cell support members 14 contribute to heat dissipation of the battery assembly, thereby preventing the battery pack from being damaged due to overheating.
Referring to fig. 4, the battery pack 10 further includes a temperature sensor 16.
The temperature sensor 16 is electrically connected to the circuit board 12 for detecting the temperature of the core assembly 13. Specifically, the temperature sensor is configured to detect the temperature of the battery cell 131, and when the temperature of the battery cell 131 is greater than or equal to a threshold value, the battery pack 10 stops outputting the electric energy. In some embodiments, the temperature sensor 16 is disposed on a side of the tab 132 adjacent to the cell support member 14. In other embodiments, first sensor 16 may also be placed on the electrical core assembly. Optionally, one or more first sensors may be provided; the first sensor 16 may be a thermistor, a thermocouple, a digital temperature sensor, or the like.
In this embodiment, the safety problem caused by the excessively high temperature of the battery cell in the use process can be prevented by arranging the temperature sensor.
Referring to fig. 11 and 12, the battery pack 10 further includes a pressure sensor 171, a switch 18, and a controller 19.
The encapsulation 1311 surrounds the outside of the cell to encapsulate the cell to prevent leakage of compounds within the cell.
The pressure sensor 171 detects the amount of deformation of the package 1311. The pressure sensor 171 detects the amount of deformation of the cell package 1311, and sends a signal to the controller 19 when the amount of deformation of any one of the cell packages 1311 exceeds a threshold value. In some embodiments, the pressure sensors 171 are disposed between adjacent cells 131, which improves the sensitivity of the pressure sensors 171 to detect deformation. In other embodiments, the pressure sensor 171 is disposed at any one of the upper surface, the lower surface, and between the adjacent cells 131 or between the upper surface, the lower surface, and between the adjacent cells 131 of the cell assembly.
Alternatively, the pressure sensor 171 may be one or a combination of a semiconductor piezoelectric resistance type sensor, an electrostatic capacity type pressure sensor, and the like.
And a switch 18 electrically connected between the tab 132 and the battery pack terminal 121 for turning on or off the electrical connection between the tab 132 and the battery pack terminal 121. The on and off of the switch 18 is controlled by a controller 19. The switch is disposed on the circuit board 12, and the switch may be a metal oxide semiconductor transistor (MOSFET), or may also be an electronic switch such as an Insulated Gate Bipolar Transistor (IGBT) or a relay. In some embodiments, the switch may also be a mechanical switch.
The controller 19 is electrically connected to the pressure sensor 171 and the switch 18, respectively, and the controller 19 receives a signal from the pressure sensor 171, and turns off the switch 18 when the pressure sensor 171 detects that the deformation amount of the package 1311 exceeds a threshold value, so that the battery pack 10 stops outputting electric power.
When the package 1311 expands and the sensor 171 detects that the amount of deformation of the package 1311 exceeds the threshold value, a signal is sent to the controller 19, and the controller 19 receives the signal from the pressure sensor 171 to open the switch 18, so that the battery pack 10 stops outputting electric power.
In some embodiments, the switch 18 is a mechanical switch, and is connected between the tab 132 and the battery pack terminal 121 for turning on or off the electrical connection between the tab 132 and the battery pack terminal 121. When the enclosure 1311 swells to some extent, the mechanical switch is pushed open, so that the battery pack 10 stops outputting electric power.
Referring to fig. 13 and 14, in some embodiments, the battery pack 10 further includes a gas sensor 172, a switch 18, and a controller 19.
The gas sensor 172 detects the gas concentration in the housing 11. The gas sensor 172 detects the concentration of the gas in the housing 11, and sends a signal to the controller 19 when the concentration of the gas in the housing 11 is equal to or higher than a concentration threshold value. In some embodiments, the gas sensor 172 is disposed within the battery pack housing 11 near the electric core assembly 13 to improve the sensitivity of the gas sensor for detecting the gas concentration. In other embodiments, the gas sensor 172 may be disposed on any surface of the electric core assembly 13.
And a switch 18 electrically connected between the tab 132 and the battery pack terminal 121 for turning on or off the electrical connection between the tab 132 and the battery pack terminal 121. The on and off of the switch 18 is controlled by a controller 19. The switch 18 is disposed on the circuit board 12, and the switch may be a metal oxide semiconductor transistor (MOSFET), or an electronic switch such as an Insulated Gate Bipolar Transistor (IGBT) or a relay.
The controller 19 is electrically connected to the gas sensor 172 and the switch 18, respectively, and the controller 19 receives a signal from the gas sensor 172, and turns off the switch 18 to disconnect the electrical connection between the tab 132 and the battery pack terminal 121 when the gas sensor 172 detects that the concentration of the gas in the case 11 is equal to or higher than a concentration threshold value.
When the package 135 expands to damage the package 135 and volatilize gas, and the gas sensor 172 detects that the gas concentration in the case 11 is equal to or higher than the concentration threshold value, a signal is sent to the controller 19, and the controller 19 receives the signal from the gas sensor 172 to turn off the switch 18, thereby cutting off the electrical connection between the tab 132 and the battery pack terminal 121.
Referring to fig. 15, the battery pack further includes a voltage detection device 173, a controller 19'.
The voltage detection device 173 is used for detecting the voltage of the battery cell 131, the voltage detection device 173 is disposed on the circuit board, and the voltage detection device 173 is electrically connected to the controller 19', and sends a signal to the controller 19' when the voltage of the battery cell 131 rapidly drops. In some embodiments, a voltage detection device 173 may also be disposed on the tab 132.
The switch 18' is electrically connected between the tab 132 and the battery pack terminal 121, and is used for turning on or off the electrical connection between the tab 132 and the battery pack terminal 121. The on and off of the switch 18 is controlled by a controller 19. The switch 18 is disposed on the circuit board 12, and the switch may be a metal oxide semiconductor transistor (MOSFET), or an electronic switch such as an Insulated Gate Bipolar Transistor (IGBT) or a relay.
The controller 19' is electrically connected to the voltage detection device 173 and the switch 18, respectively. The controller 19' receives a signal from the voltage detection device 173, and when the cell voltage drop rate detected by the voltage detection device 173 reaches a rate threshold, turns off the switch 18, thereby disconnecting the tab 132 from the battery pack terminal 121.
When the package 1311 is broken, the cell voltage drops rapidly, and when the cell voltage drop rate detected by the voltage detection device 173 reaches a rate threshold, the voltage detection device 173 sends a signal to the controller 19', and the controller 19' receives the signal from the voltage detection device, so that the switch 18 is turned off, and the electrical connection between the tab 132 and the battery pack terminal 121 is cut off.
Fig. 16 is a graph comparing the discharge curves of the battery pack 10 of the present embodiment and the conventional cylindrical lithium battery pack, wherein the battery pack is discharged at a rate of 10C, and 10C represents the current intensity of the battery pack when the battery pack is completely discharged for 0.1 hour. Specifically, the discharge time of the nominal voltage value of the battery cell of 3.6V is satisfied, the battery pack 10 of the embodiment can be maintained for more than 100s, while the existing cylindrical lithium battery pack can only be maintained for 6 s. Therefore, the battery pack 10 of the present embodiment has a higher voltage and higher efficiency at the same discharge rate.
Fig. 17 illustrates a power tool and a battery pack 10 that can be adapted to power the power tool. In fig. 17, the electric power tool is a hand-propelled snow sweeper 21. The battery pack 10 supplies electric power to the snow blower 21. The snow sweeper 21 includes a handle assembly 211, a housing assembly 212, a snow sweeping paddle 213, a snow throwing device 214, a motor 215, an angle adjustment device 216, and wheels 217. The handle assembly 211 is for user operation and the housing assembly 212 houses or holds a motor 215. The snow-removing paddle 213 is a functional element of the snow remover 21. The motor 215 drives the snow-sweeping paddle 30 to rotate so as to realize the snow sweeping function. The axis of rotation of the motor 215 is parallel to the axis of rotation of the snow paddle 213. Specifically, the battery pack 10 is electrically connected to the motor 215 to provide power to the motor 215. Wheels 217 rotate relative to housing assembly 212 for enabling snowplow 21 to walk on the ground, and snow thrower 214 is used to alter the trajectory of the snow to direct the snow away. The host 22 performs a snow sweeping function. The housing assembly 212, the snow plow blade 214, and the motor 215 form the main body 22 of the snow plow 21. The battery pack 10 is detachably connected to the host 22. The battery pack 10 may be a single battery pack or a plurality of battery packs, the casing assembly 212 includes a main case, and further includes a battery cover 2121 and a battery case body 2122, the battery cover 2121 and the battery case body 2122 surround a battery case 2123 for accommodating the battery pack, in this embodiment, at least a portion of the battery case body 2122 is accommodated in an accommodating cavity formed by the main case. The battery compartment includes two first cavities 2123a and 2123b partitioned by the battery compartment body, and two battery packs 10 are respectively mounted in the first cavities 2123a and the second cavities 2123 b.
Referring to fig. 18, the battery pack was discharged at a rate of 5C after being left at-20 ℃ for 12 hours, wherein 5C represents the current intensity when the cell assembly 1/5 was completely discharged for hours. The existing cylindrical lithium battery pack enters under-voltage protection (the under-voltage critical value is set to be 2.75V) for about 15s of power supply, so that the existing cylindrical lithium battery pack cannot output electric energy when entering the under-voltage protection. While the battery pack 10 of the present embodiment can maintain continuous discharge. Under the condition that the ambient temperature is-22 ℃ and T is less than or equal to-15 ℃, the cell assembly 13 can discharge at 5C rate, wherein 5C represents the current intensity when the cell assembly 1/5 hours is completely discharged. Furthermore, the value range of the environmental temperature is more than or equal to minus 22 ℃ and less than or equal to minus 18 ℃, and the electric core component 13 can discharge electricity at 5C multiplying power. In other embodiments, the cell assembly 13 may discharge at a rate of 5C or more. The battery pack of this embodiment can work under low temperature environment, continues to supply power for the electric tool that needs work under the low temperature operating mode, has overcome current cylinder type lithium cell package and has had because of ambient temperature crosses the defect that influences electric energy output excessively under low temperature environment.
The battery pack 10 may also provide power to the lawnmower, as described with reference to the lawnmower mechanical performance test curve shown in fig. 19. When the output current of the battery pack is 50A, the rotating speed of the mower powered by the battery pack 10 is 7.4% higher than that of the mower powered by the cylindrical lithium battery pack; when the output current of the battery pack is 72A, the rotating speed of the mower powered by the battery pack is 13.3% higher than that of the mower powered by the cylindrical lithium battery pack. Therefore, the battery pack 10 has more obvious advantages, higher rotating speed and higher output power under the heavy load condition compared with a cylindrical lithium battery pack.
While the present embodiments relate to snow plows, lawn mowers, it should be understood that the present invention is not limited to the disclosed embodiments, but may be applied to other types of power tools, including but not limited to angle grinders, power drills, power wrenches, power saws, and the like.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the scope of the present invention.
Claims (11)
1. A power tool includes a tool body and a battery pack that supplies power to the tool body;
the battery pack includes:
a housing;
an electrical core assembly disposed within the housing;
a cell support at least for supporting the cell assembly;
wherein the content of the first and second substances,
the electric core assembly comprises:
the battery comprises a plurality of sheet-shaped battery cells, a plurality of battery cells and a plurality of battery cells, wherein the plurality of sheet-shaped battery cells are arranged in a stacked manner;
the battery cell comprises a packaging part, and the packaging part is used for packaging the battery cell;
the tabs are arranged at two ends of the battery cell assembly and protrude out of the battery cell;
the battery cell supporting pieces are arranged at two ends of the battery cell assembly, at least part of the battery cell supporting pieces encapsulate the tabs, and the heat conductivity coefficient of the battery cell supporting pieces is greater than or equal to 0.6W/(m.k).
2. The power tool of claim 1,
the compression rate of the cell support piece is more than 50 percent or
The elongation at break of the cell support member is greater than or equal to 100 or
The tensile strength of the support is greater than or equal to 0.9N/mm.
3. The power tool of claim 1,
the battery pack further includes:
the circuit board is electrically connected with the lug;
the distance between the lower surface of the circuit board and the upper surface of the battery pack is greater than or equal to 5 mm.
4. The power tool of claim 1,
the battery pack further includes:
a buffer member surrounding along an outer surface of the electric core assembly to fix the electric core assembly;
the buffer layer is arranged between the adjacent battery cells; the material of the buffer layer is the same as that of the cell support piece.
5. The power tool of claim 1,
the cell supporting pieces are formed at two ends of the cell assembly in a glue injection mode.
6. The power tool of claim 1,
the battery pack further includes:
the temperature sensor is used for detecting the temperature of the battery cell;
the temperature sensor is arranged on one side, close to the battery cell supporting piece, of the battery cell lug.
7. A battery pack for powering an electric tool,
the battery pack includes:
a housing;
an electrical core assembly disposed within the housing;
a cell support at least for supporting the cell assembly;
wherein the content of the first and second substances,
the electric core assembly comprises:
the battery comprises a plurality of sheet-shaped battery cells, a plurality of battery cells and a plurality of battery cells, wherein the sheet-shaped battery cells are arranged in a stacked manner;
the battery cell comprises a packaging piece used for packaging the battery cell;
the tabs are arranged at two ends of the battery cell assembly and protrude out of the battery cell;
the battery cell supporting pieces are arranged at two ends of the battery cell assembly, at least part of the battery cell supporting pieces encapsulate the tabs, and the heat conductivity coefficient of the battery cell supporting pieces is greater than or equal to 0.6W/(m.k).
8. The battery pack according to claim 7,
the compression rate of the cell support piece is more than 50 percent or
The elongation at break of the cell support member is greater than or equal to 100 or
The tensile strength of the support is greater than or equal to 0.9N/mm.
9. The battery pack according to claim 7,
the battery pack further includes:
a buffer member surrounding along an outer surface of the electric core assembly to fix the electric core assembly;
the buffer layer is arranged between the adjacent battery cells; the material of the buffer layer is the same as that of the cell support piece.
10. The battery pack according to claim 7,
the cell supporting pieces are formed at two ends of the cell assembly in a glue injection mode.
11. The battery pack according to claim 7,
the battery pack further includes:
the temperature sensor is used for detecting the temperature of the battery cell;
the temperature sensor is arranged on one side, close to the battery cell supporting piece, of the battery cell lug.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910534991 | 2019-06-20 | ||
| CN2019105349914 | 2019-06-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112117401A true CN112117401A (en) | 2020-12-22 |
Family
ID=73795297
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910829525.9A Pending CN112117402A (en) | 2019-06-20 | 2019-09-03 | Battery pack and method for manufacturing same |
| CN201910828849.0A Pending CN112117479A (en) | 2019-06-20 | 2019-09-03 | Electric tool and battery pack thereof |
| CN201910829490.9A Pending CN112117401A (en) | 2019-06-20 | 2019-09-03 | Electric tool and battery pack thereof |
| CN201910829563.4A Pending CN112117480A (en) | 2019-06-20 | 2019-09-03 | Battery pack and electric tool adopting same |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910829525.9A Pending CN112117402A (en) | 2019-06-20 | 2019-09-03 | Battery pack and method for manufacturing same |
| CN201910828849.0A Pending CN112117479A (en) | 2019-06-20 | 2019-09-03 | Electric tool and battery pack thereof |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910829563.4A Pending CN112117480A (en) | 2019-06-20 | 2019-09-03 | Battery pack and electric tool adopting same |
Country Status (1)
| Country | Link |
|---|---|
| CN (4) | CN112117402A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113097665A (en) * | 2021-03-30 | 2021-07-09 | 东莞新能安科技有限公司 | Battery module and electric device |
| CN114430079A (en) * | 2021-01-21 | 2022-05-03 | 东莞新能安科技有限公司 | Battery pack and power consumption device |
| WO2024027323A1 (en) * | 2022-08-05 | 2024-02-08 | 南京泉峰科技有限公司 | Battery pack for supplying power to electronic device, battery compartment, and tool system |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114865112A (en) * | 2021-02-04 | 2022-08-05 | 南京泉峰科技有限公司 | Battery pack and discharge control method thereof |
| CN115224456A (en) * | 2021-04-15 | 2022-10-21 | 南京泉峰科技有限公司 | Battery pack and electric tool |
| WO2022218051A1 (en) * | 2021-04-15 | 2022-10-20 | 南京泉峰科技有限公司 | Battery pack and power tool |
| CN115224455A (en) * | 2021-04-15 | 2022-10-21 | 南京泉峰科技有限公司 | Battery pack and electric tool |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006030659A1 (en) * | 2004-09-13 | 2006-03-23 | Max Co., Ltd. | Battery pack |
| KR20110108010A (en) * | 2010-03-26 | 2011-10-05 | 주식회사 엘지화학 | Middle or large sized battery pack and packaging method thereof |
| CN102484232A (en) * | 2009-09-02 | 2012-05-30 | Nec能源元器件株式会社 | Assembled battery module |
| CN105359328A (en) * | 2013-06-26 | 2016-02-24 | 创科电动工具科技有限公司 | Battery pack, tool battery and battery-powered tool |
| CN106848385A (en) * | 2017-03-23 | 2017-06-13 | 广东天劲新能源科技股份有限公司 | A kind of power soft bag lithium ionic cell of multireel cored structure |
| CN108258168A (en) * | 2018-03-21 | 2018-07-06 | 湖南金杯新能源发展有限公司 | Square electric cell module |
| CN109546027A (en) * | 2017-09-22 | 2019-03-29 | 苏州宝时得电动工具有限公司 | Battery pack and electric tool component |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011016527A1 (en) * | 2011-04-08 | 2012-10-11 | Daimler Ag | Apparatus and method for leak detection of an electrochemical energy storage device |
| CN104157922B (en) * | 2014-08-29 | 2017-05-03 | 合肥国轩高科动力能源有限公司 | Aluminum casing type lithium-ion power battery |
| ES1127280Y (en) * | 2014-09-25 | 2015-01-16 | Boix Maquinaria Sl | Carton box mounting machine with loader |
| WO2017113352A1 (en) * | 2015-12-31 | 2017-07-06 | 深圳市大富精工有限公司 | Battery |
| CN109428024B (en) * | 2017-08-31 | 2022-02-01 | 宁德时代新能源科技股份有限公司 | Battery unit and battery module |
-
2019
- 2019-09-03 CN CN201910829525.9A patent/CN112117402A/en active Pending
- 2019-09-03 CN CN201910828849.0A patent/CN112117479A/en active Pending
- 2019-09-03 CN CN201910829490.9A patent/CN112117401A/en active Pending
- 2019-09-03 CN CN201910829563.4A patent/CN112117480A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006030659A1 (en) * | 2004-09-13 | 2006-03-23 | Max Co., Ltd. | Battery pack |
| CN102484232A (en) * | 2009-09-02 | 2012-05-30 | Nec能源元器件株式会社 | Assembled battery module |
| KR20110108010A (en) * | 2010-03-26 | 2011-10-05 | 주식회사 엘지화학 | Middle or large sized battery pack and packaging method thereof |
| CN105359328A (en) * | 2013-06-26 | 2016-02-24 | 创科电动工具科技有限公司 | Battery pack, tool battery and battery-powered tool |
| US20160141728A1 (en) * | 2013-06-26 | 2016-05-19 | Techtronic Power Tools Tecnology Limited | Battery pack, tool battery and battery operated tool |
| CN106848385A (en) * | 2017-03-23 | 2017-06-13 | 广东天劲新能源科技股份有限公司 | A kind of power soft bag lithium ionic cell of multireel cored structure |
| CN109546027A (en) * | 2017-09-22 | 2019-03-29 | 苏州宝时得电动工具有限公司 | Battery pack and electric tool component |
| CN108258168A (en) * | 2018-03-21 | 2018-07-06 | 湖南金杯新能源发展有限公司 | Square electric cell module |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114430079A (en) * | 2021-01-21 | 2022-05-03 | 东莞新能安科技有限公司 | Battery pack and power consumption device |
| CN113097665A (en) * | 2021-03-30 | 2021-07-09 | 东莞新能安科技有限公司 | Battery module and electric device |
| WO2022205818A1 (en) * | 2021-03-30 | 2022-10-06 | 东莞新能安科技有限公司 | Battery module and power-consuming device |
| WO2024027323A1 (en) * | 2022-08-05 | 2024-02-08 | 南京泉峰科技有限公司 | Battery pack for supplying power to electronic device, battery compartment, and tool system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112117479A (en) | 2020-12-22 |
| CN112117402A (en) | 2020-12-22 |
| CN112117480A (en) | 2020-12-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112117401A (en) | Electric tool and battery pack thereof | |
| US11955615B2 (en) | Battery-powered portable tool | |
| US20220109217A1 (en) | Battery pack and combination of a power tool and the battery pack | |
| US6177209B1 (en) | Battery protector having a positive temperature coefficient element | |
| US20200358054A1 (en) | Battery Pack and Treatment System | |
| CN102208593A (en) | Secondary battery pack | |
| US20090021897A1 (en) | Assembly with a housing | |
| US20200358055A1 (en) | Battery Pack, Treatment System and Method for the Production of a Battery Pack | |
| US11450896B2 (en) | Battery pack, power tool system, and charging system | |
| JP4910234B2 (en) | Secondary battery device | |
| US20220238970A1 (en) | Battery pack | |
| US20230420789A1 (en) | Battery pack and power tool | |
| KR101057582B1 (en) | Lithium polymer battery pack | |
| WO2024099189A1 (en) | Battery pack and charging combination | |
| CN111463517B (en) | Battery pack and floor treatment device having the same | |
| JP2001286067A (en) | Protection circuit for secondary cell | |
| CN111463517A (en) | Battery pack and floor treatment device having a battery pack | |
| CN114792849A (en) | Battery pack, electric tool system and charging combination | |
| CN113206312A (en) | Battery with cooling device | |
| JP2001286066A (en) | Protection circuit for secondary cell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| CB02 | Change of applicant information |
Address after: 211106 No. 529, 159, Jiangjun Avenue, Jiangning District, Nanjing, Jiangsu Province Applicant after: Nanjing Quanfeng Technology Co.,Ltd. Address before: No. 529, Jiangjun Avenue, Jiangning Economic and Technological Development Zone, Nanjing, Jiangsu Province Applicant before: NANJING CHERVON INDUSTRY Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |