CN113193308A - Battery and electric equipment thereof - Google Patents
Battery and electric equipment thereof Download PDFInfo
- Publication number
- CN113193308A CN113193308A CN202110447476.XA CN202110447476A CN113193308A CN 113193308 A CN113193308 A CN 113193308A CN 202110447476 A CN202110447476 A CN 202110447476A CN 113193308 A CN113193308 A CN 113193308A
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- electrode assembly
- battery
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- conductive unit
- protection
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- 230000001681 protective effect Effects 0.000 claims abstract description 59
- 230000000712 assembly Effects 0.000 claims abstract description 5
- 238000000429 assembly Methods 0.000 claims abstract description 5
- 238000004806 packaging method and process Methods 0.000 claims description 30
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 239000012528 membrane Substances 0.000 claims 1
- 238000012856 packing Methods 0.000 abstract description 17
- 239000002390 adhesive tape Substances 0.000 description 14
- 238000007789 sealing Methods 0.000 description 10
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The application provides a battery, including first electrode subassembly, second electrode subassembly, first electrically conductive unit, the electrically conductive unit of second, wrapping bag and first protection plate subassembly and second protection plate subassembly. The first electrode assembly and the first conductive element are electrically connected. The second electrode assembly and the second conductive element are electrically connected. The package bag houses the first electrode assembly and the second electrode assembly, and the first conductive unit and the second conductive unit extend outwardly from the first electrode assembly and the second electrode assembly, respectively, to the outside of the package bag. The first protective sheet assembly is located outside the package and electrically connected to the first conductive unit. The second protection plate assembly is located outside the packing bag and electrically connected with the second conductive unit. The first and second protection plate assemblies have plate-shaped structures extending in a predetermined direction, and plate surfaces of the first and second protection plate assemblies face the first and second electrode assemblies, respectively. The application also provides an electric device comprising the battery.
Description
Technical Field
The application relates to the field of electrochemistry, in particular to a battery and electric equipment thereof.
Background
The lithium ion battery has the advantages of high energy density, high reliability and the like, so that the lithium ion battery is widely applied to the fields of mobile terminals, intelligent mobile homes, intelligent aircrafts and the like. At present, with the rapid development of intelligent mobile terminals, people have higher and higher demands on the charging speed and capacity of lithium batteries. High-rate charging can realize quick charging, but is limited by electrode materials and diffusion speed, and high-rate charging can obviously reduce the volume energy density of lithium batteries, if the capacity is to be improved, the volume of the lithium batteries needs to be increased, so that the volume of electric equipment is increased, and the requirement of battery lightening and thinning is not met. In addition, the capacity of the lithium battery can be improved through low-rate charging, but the charging speed is reduced, and the user experience is reduced. Therefore, it is necessary to provide a battery and an electric device having a good charging speed and a large battery capacity.
Disclosure of Invention
In order to solve the above-mentioned prior art, the present application provides a battery and a power consumption device that overcome or improve the problems of the prior art.
One aspect of the present application provides a battery including a first electrode assembly, a second electrode assembly, a first conductive unit, a second conductive unit, a packaging bag, and a first protection plate assembly and a second protection plate assembly. The first electrode assembly and the first conductive element are electrically connected. The second electrode assembly and the second conductive element are electrically connected. The packaging bag houses the first electrode assembly and the second electrode assembly, and the first conductive unit and the second conductive unit extend outward from the first electrode assembly and the second electrode assembly, respectively, to the outside of the packaging bag. The first protective plate assembly is located outside the packaging bag and electrically connected with the first conductive unit located on the same side of the packaging bag. The second protection plate assembly is located outside the packaging bag and electrically connected with the second protection plate and the second conductive unit. The first protection plate assembly and the second protection plate assembly have plate-shaped structures extending in a preset direction, and any one plate surface of the first protection plate assembly faces the first electrode assembly and any one plate surface of the second protection plate assembly faces the second electrode assembly.
In some embodiments of the present application, the first electrode assembly has a first charge rate and the second electrode assembly has a second charge rate, the first charge rate being greater than the second charge rate.
In some embodiments of the present application, the first electrode assembly has a charge rate of 1C to 10C, and the second electrode assembly has a charge rate of less than 1C; or the charging rate of the first electrode assembly and the second electrode assembly is 1C-10C, and the charging rate of the second electrode assembly is smaller than that of the first electrode assembly.
In some embodiments of the present application, the first protection plate assembly includes a first protection plate, the second protection plate assembly includes a second protection plate, and a length of the first protection plate in the preset direction is greater than a length of the second protection plate in the preset direction.
In some embodiments of the present application, the battery has a length direction, a width direction and a thickness direction which are perpendicular to each other, and the preset direction is parallel to the width direction of the battery; the wrapping bag includes the edge length direction relative top banding portion and the bottom that sets up, follows width direction relative two lateral parts that set up, follow thickness direction relative deep pit and the shallow pit that sets up, top banding portion orientation deep pit or shallow pit are buckled, first protection board subassembly with the face orientation of second protection board subassembly top banding portion.
In some embodiments of the present application, the first protection plate and the second protection plate respectively include one or more flexible circuit boards.
In some embodiments of the present application, the battery further comprises a separator between the first electrode assembly and the second electrode assembly.
In some embodiments of the present application, the first conductive unit includes two tabs, and the second conductive unit includes two tabs; or, the first conductive unit comprises three tabs, and the second conductive unit comprises two tabs; or, the first conductive unit comprises four tabs, and the second conductive unit comprises two tabs.
In some embodiments of the present application, the first conductive element extends from a same side of the package or extends from opposite sides of the package; the second conductive element extends from the same side of the package or extends from opposite sides of the package.
In some embodiments of the present application, the first conductive unit includes three or four tabs, the tabs of the first conductive unit extend from the same side of the packaging bag, the first protection plate assembly includes a first protection plate connected to the tabs of the first conductive unit located on the same side of the packaging bag, the second protection plate assembly includes a second protection plate, and the second protection plate is connected to the second conductive unit; or, first electrically conductive unit's utmost point ear is followed respectively the relative both sides of wrapping bag extend out, first protection shield subassembly includes first protection shield and third protection shield, first protection shield with the third protection shield is connected respectively and is located the utmost point ear of the first electrically conductive unit of the relative both sides of wrapping bag, second protection shield subassembly includes the second protection shield, the second protection shield with the electrically conductive unit of second is connected.
In some embodiments of the present application, the first guard plate assembly includes a portion opposite the first electrode assembly and a portion opposite the second electrode assembly, and the second guard plate assembly includes a portion opposite the second electrode assembly; or: the first protection plate assembly includes a portion opposite to the first electrode assembly and a portion opposite to the second electrode assembly, the second protection plate assembly includes a portion opposite to the first electrode assembly and a portion opposite to the second electrode assembly, and the first protection plate assembly and the second protection plate assembly are alternately disposed.
In some embodiments of the present application, the battery has a length direction, a width direction, and a thickness direction that are perpendicular to each other, the preset direction is parallel to the width direction of the battery, and the first electrode assembly and the second electrode assembly are disposed side by side along the length direction or the width direction or the thickness direction.
In some embodiments of the present application, the first electrode assembly and the second electrode assembly differ in a dimension that is at least one of a length or a width or a thickness.
In some embodiments of the present application, the package is a steel shell.
The application also provides an electric device comprising the battery.
The battery of this application includes first electrode subassembly and the first protection board that corresponds to and second electrode subassembly and the second protection board that corresponds, first protection board with the face of second protection board respectively towards first electrode subassembly with second electrode subassembly reduces the length make full use of encapsulation space of battery, the battery has higher energy density. The combination of the high-rate electrode assembly and the low-rate electrode assembly meets the requirement of quick charging of the battery and improves the capacity of the battery. Because the protection shield line space demand that the high magnification charges is great, the length of first protection shield is greater than the length of second protection shield in the direction of predetermineeing, can reduce the board width when satisfying the charge demand of the different electrode subassembly of high-low magnification. In addition, the top edge sealing part of the packaging bag of the battery can also adopt an edge sealing process of bending towards a deep pit or a shallow pit so as to further improve the capacity of the battery core.
Drawings
FIG. 1 is a schematic perspective view of one embodiment of a battery of the present application;
FIG. 2 is a partially exploded schematic view of the battery of FIG. 1;
FIG. 3 is a schematic diagram of one embodiment of a battery of the present application;
FIGS. 4-6 are schematic diagrams comparing widths of different embodiments of the first electrode assembly and the second electrode assembly;
FIG. 7 is a schematic diagram of one embodiment of a battery of the present application;
FIG. 8 is a schematic view of one embodiment of a battery of the present application;
FIG. 9 is a schematic view of one embodiment of a battery of the present application;
fig. 10 is a schematic diagram of one embodiment of a battery of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In the description of the present application, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; either mechanically or electrically or in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship or combination of two or more elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate. The disclosure of the present application provides many different embodiments or examples for implementing different configurations of the present application. In order to simplify the disclosure of the present application, only the components and settings of a specific example are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, this application may repeat reference numerals and/or letters in the various examples, such repeat use is intended to provide a simplified and clear description of the present invention and is not intended to suggest any particular relationship between the various embodiments and/or arrangements discussed.
Fig. 1 is a perspective view of a battery 1 according to an embodiment of the present application. The battery 1 has a width direction parallel to an X direction, a length direction parallel to a Y direction, and a thickness direction parallel to a Z direction, wherein the length direction, the width direction, and the thickness direction are perpendicular to each other two by two. The battery 1 includes a first electrode assembly 11, a second electrode assembly 12, a first conductive unit 13, a second conductive unit 14, two packing bags 30, a first protection plate assembly 211, and a second protection plate assembly 222. The first electrode assembly 11 and the first conductive unit 13 are electrically connected. The second electrode assembly 12 and the second conductive element 14 are electrically connected. The first electrode assembly 11 and the second electrode assembly 12 are respectively located in two packing bags 30. The first protective plate assembly 211 is located outside the packing bag 30 and electrically connected to the first conductive unit 13. The second protection plate group 222 is located outside the packing bag 30 and electrically connected to the second conductive unit 14. The plate surfaces of the first protective plate assembly 21 face the first electrode assembly 11 and the second protective plate 22 face the second electrode assembly 12, respectively. Specifically, in the present embodiment, the first protection plate assembly 211 includes a first protection plate 21, and the second protection plate assembly 222 includes a second protection plate 22.
Referring to fig. 2, each of the packing bags 30 includes a top-sealed edge portion (not numbered), and a deep well 101 and a shallow well 102 which are oppositely disposed in the thickness direction. In some embodiments, the top seal edge portions of the two packaging bags 30 are bent toward the deep pits, and the plate surfaces of the first protective plate 21 and the second protective plate 22 face the first electrode assembly 11 and the second electrode assembly 12, respectively. In other embodiments, the top seal edges of the two pouches 30 are folded toward the shallow recess.
In some embodiments, the battery 1 may further include an electrode assembly fixing adhesive tape 40 and a liquid adhesive 50. The electrode assembly fixing adhesive tape 40 is adhered in a half-surrounded manner to the shallow recesses 102 of the two packing bags 30 and the side portions positioned at the outermost layer, and the liquid adhesive 50 is adhered between the side portions of the two packing bags 30 facing each other. The electrode assembly fixing adhesive tape 40 and the liquid glue 50 are used to connect and fix the two packing bags 30.
In some embodiments, the battery 1 may further include a bottom insulating adhesive tape 60 and a protective plate fixing adhesive tape 70, the bottom insulating adhesive tape 60 is adhered to the outer surfaces of the bottoms of the two packaging bags 30, and the protective plate fixing adhesive tape 70 is adhered between the first protective plate 21, the second protective plate 22 and the top sealing edge portions of the two packaging bags 30. The bottom insulating adhesive tape 60 is used for insulating the bottom of the packaging bag 30, and the protective plate fixing adhesive tape 70 is used for insulating the top edge sealing part of the packaging bag 30 from the first protective plate 21 and the second protective plate 22.
In this embodiment, the plate surfaces of the first protective plate 21 and the second protective plate 22 face the first electrode assembly 11 and the second electrode assembly 12, respectively. First conductive element 13 and second conductive element 14 follow the edge sealing portion of two wrapping bags 30 extends, and the edge sealing portion of two wrapping bags 30 is towards one side bending to the volume space of saving battery 1 that can be better improves energy density.
Optionally, in some embodiments of the present application, the first electrode assembly 11 has a first charging rate, and the second electrode assembly 12 has a second charging rate, wherein the first charging rate is greater than the second charging rate. The first protective plate 21 is electrically connected to the first electrode assembly 11, and the second protective plate 22 is electrically connected to the second electrode assembly 12. The first electrode assembly 11 and the second electrode assembly 12 are separately and insulatively disposed. The first protective plate 21 and the second protective plate 22 have a plate-like structure extending in a predetermined direction, and a length of the first protective plate 21 in the predetermined direction is larger than a length of the second protective plate 22 in the predetermined direction. As shown in fig. 1, the preset direction may be parallel to the width direction. Specifically, the length of the first protective plate 21 in the preset direction is D1, the length of the second protective plate 22 in the preset direction is D2, and D1 > D2. It is understood that the first protective plate 21 has a portion extending to a position opposite above the second electrode assembly 12 because the first protective plate 21 has a greater length in the predetermined direction, and the second protective plate 22 does not include a portion opposite to the first electrode assembly 11.
Fig. 3 is an exploded view of the battery 1a according to an embodiment of the present application. The battery 1a has a length direction (Y direction), a width direction (X direction), and a thickness direction (Z direction) perpendicular to each other. The battery 1a includes a first electrode assembly 11, a second electrode assembly 12, a first conductive unit 13, a second conductive unit 14, a packing bag 30, a first protection plate assembly 211, and a second protection plate assembly 222. The first electrode assembly 11 and the first conductive unit 13 are electrically connected. The second electrode assembly 12 and the second conductive element 14 are electrically connected. The first electrode assembly 11 and the second electrode assembly 12 are provided in the package bag 30. The first protective plate assembly 211 is located outside the packing bag 30 and electrically connected to the first conductive unit 13. The second protection plate assembly 222 is located outside the packing bag 30 and is electrically connected to the second conductive unit 14. The first protection plate assembly 211 and the second protection plate assembly 222 have plate-shaped structures extending along a preset direction, and the plate surfaces of the first protection plate assembly 211 and the second protection plate assembly 222 respectively face the first electrode assembly 11 and the second electrode assembly 12, so that the length of the battery 1a in the length direction can be reduced, the space is saved, and compared with the battery in the prior art with the same length, the energy density of the battery 1 is higher. In this embodiment, the first protection plate assembly 211 includes a first protection plate 21, and the second protection plate assembly 222 includes a second protection plate 22.
Alternatively, in some embodiments, the first electrode assembly 11 has a first charge and discharge rate, and the second electrode assembly 12 has a second charge and discharge rate, wherein the first charge and discharge rate is greater than the second charge and discharge rate. The first protective plate 21 is electrically connected to the first electrode assembly 11, and the second protective plate 22 is electrically connected to the second electrode assembly 12. The first electrode assembly 11 and the second electrode assembly 12 are separately and insulatively disposed.
The packing bag 30 includes a top seal portion 31 and a bottom portion (not numbered) which are oppositely disposed along the length direction, two side portions (not numbered) which are oppositely disposed along the width direction, a deep pit (not numbered) and a shallow pit (not numbered) which are oppositely disposed along the thickness direction, and the plate surfaces of the first protection plate 21 and the second protection plate 22 face the top seal portion 31.
In the embodiment of the present application, the first protective plate 21 and the second protective plate 22 respectively include one or more flexible circuit boards electrically connecting the first conductive unit 13, the second conductive unit 14, and an external circuit. The first conductive unit 13 includes two tabs 103, and the second conductive unit 14 includes two tabs 103.
Alternatively, in other embodiments of the present application, the first conductive unit 13 may include three tabs 103, and the second conductive unit 14 may include two tabs 103; alternatively, the first conductive unit 13 may include four tabs 103 or more tabs 103, and the second conductive unit 14 may include two tabs 103. The present application is not limited thereto.
In some embodiments, the first conductive unit 13 includes three or four or more tabs 103, and the three or four or more tabs 103 may extend from the same side of the packaging bag 30 (e.g., the top seal edge 31 or the bottom of the packaging bag 30).
In some embodiments, the first conductive unit 13 includes three or four or more tabs 103, and the three or four or more tabs 103 may extend out from different sides (e.g., the top-sealed portion 31 and the bottom) of the packaging bag 30 at the same time. Also, the tab 103 extending from the top-hat part 31 and the tab 103 extending from the bottom part may be respectively connected to different protection plates. For example, the battery may include a third protection plate, the first protection plate 21 is coupled to the tab 103 of the first conductive unit 13 at one side of the pouch, and the third protection plate is coupled to the tab 103 of the first conductive unit 13 at the opposite side of the pouch.
In some embodiments, the first protective sheet 21 and the second protective sheet 22 each include one or more flexible circuit boards 201. Optionally, the battery 1a may further include a flexible circuit board fixing adhesive tape 90 for fixing the flexible circuit board 201.
Optionally, in some embodiments, the battery 1a may further include a separation film 108 located between the first electrode assembly 11 and the second electrode assembly 12, and the separation film 108 may be used to separate the first electrode assembly 11 from the second electrode assembly 12.
In some embodiments, the battery 1a may further include a top-sealed insulating foam 71 adhered between the first protective sheet 21, the second protective sheet 22 and the top-sealed edge portion of the packaging bag 30, a bottom insulating adhesive tape 60 adhered to the bottom of the packaging bag 30, and side insulating adhesive tapes 80 adhered to the two side portions. The bottom adhesive tape 60 insulates the packing bag 30 at the bottom, the top-sealed insulating foam 71 insulates the first protective sheet 21, the second protective sheet 22 from the top-sealed edge of the packing bag 30, and the side adhesive tape 80 insulates the packing bag 30 at the side. Alternatively, the packing bag 30 may be an aluminum plastic film.
Alternatively, in some embodiments, the first guard plate assembly 211 includes a portion opposite the first electrode assembly 11 and a portion opposite the second electrode assembly 12, and the second guard plate assembly 222 includes a portion opposite the second electrode assembly 12. Alternatively, in some embodiments, the second guard plate assembly 222 includes a portion opposite the first electrode assembly 11 and a portion opposite the second electrode assembly 12, and the first guard plate assembly 211 includes a portion opposite the first electrode assembly 11. Alternatively, in some embodiments, the first protection plate assembly 211 includes a portion opposite to the first electrode assembly 11 and a portion opposite to the second electrode assembly 12, the second protection plate assembly 222 includes a portion opposite to the first electrode assembly 11 and a portion opposite to the second electrode assembly 12, and the first protection plate assembly 211 and the second protection plate assembly 222 are partially staggered. The staggered arrangement here is understood to mean that the plate-like structures of the first protection plate assembly 211 and the second protection plate assembly 222 do not lie on the same line parallel to the preset direction. For example, but not limited to, the first protection plate assembly 211 and the second protection plate assembly 222 may be alternately arranged in the thickness direction of the battery 1a, such that the first protection plate 21 and/or the second protection plate 22 do not block each other when extending outward in a direction parallel to the preset direction.
In the embodiment, the first electrode assembly 11 and the second electrode assembly 12 are arranged side by side in the width direction of the battery 1 a. In other or modified embodiments of the present application, the first electrode assembly 11 and the second electrode assembly 12 may be arranged side by side in a length direction or a width direction or a thickness direction of the battery 1.
In this embodiment, the first electrode assembly 11 may be a high-rate electrode assembly, the second electrode assembly 12 may be a low-rate electrode assembly, the first protection plate 21 may be a high-rate cell protection plate, and the second protection plate 22 may be a low-rate cell protection plate, because a protection circuit for charging the high-rate electrode assembly is complex, a required circuit layout space is large, a circuit layout space requirement of the low-rate electrode assembly for the protection plate is small, the length of the first protection plate 21 may be increased appropriately, the length of the second protection plate 22 may be decreased appropriately, and the length of the first protection plate 21 in the preset direction (width direction) may be greater than the length of the second protection plate 22 in the preset direction. For example, but not limited to, the first protection plate 21 is longer than the second protection plate 22 by 5 mm to 45 mm along the preset direction. In addition, the first protection plate 11 may borrow a partial space of the second protection plate 12 such that a portion of the first protection plate 11 extends to a position directly above the second electrode assembly 12. Thereby reducing the board width of the first protection board 21 and making full use of the packaging space.
In some embodiments of the present disclosure, the first electrode assembly 11 may be a high-rate electrode assembly, the second electrode assembly 12 may be a low-rate electrode assembly, the charging rate of the high-rate electrode assembly may be 1C to 10C, and the charging rate of the low-rate electrode assembly may be less than 1C.
Optionally, in other embodiments, the charging rate of the high-rate electrode assembly and the low-rate electrode assembly may be 1C to 10C, and the charging rate of the low-rate electrode assembly is smaller than the charging rate of the high-rate electrode assembly. By way of example, the energy density of the current 5C high-rate electrode assembly is about 500-650 Wh/L, while the energy density of the 0.7C low-rate electrode assembly can reach 700-850 Wh/L. Therefore, a combination of high and low rate electrode assemblies is adopted in one package, so that the charging speed is increased by using the high rate electrode assembly 10 on one hand, and the battery capacity is increased by using the low rate electrode assembly 10 on the other hand, a better balance is obtained between the charging efficiency and the overall capacity, and the high-rate battery pack has the advantages of higher charging speed and larger battery capacity.
The battery 1a is connected to a main board at a host end through the first protection board assembly 211 and the second protection board assembly 222, and a charging and discharging sequence is controlled through the main board at the host end. The battery 1a can be compatible with the charging speed of a high-rate battery cell and the high-capacity characteristic of a low-rate battery cell. In addition, a top sealing folding process (the top sealing edge part 31 is bent towards a deep pit) can be adopted, and the first protective plate 21 and the second protective plate 22 are transversely arranged, so that the energy density of the battery 1 per unit volume is improved, and the requirements of quick charging and high capacity can be met.
Referring also to fig. 4, which is a schematic cross-sectional view of the cell 1a taken along the plane parallel to XZ in fig. 3, the width W1 of the first electrode assembly 11 taken parallel to the width direction and the width W2 of the second electrode assembly 12 taken parallel to the width direction shown in fig. 4 may be equal.
Fig. 5 is an exploded view of a battery 1b according to a modified embodiment of the battery 1. Similarly to the battery 1, the battery 1b has a length direction, a width direction, and a thickness direction that are perpendicular two by two.
Referring to fig. 5, which is a schematic cross-sectional view of the battery 1a taken along the plane parallel to XZ in fig. 3, the width W1 of the first electrode assembly 11 parallel to the width direction shown in fig. 5 may be greater than the width W2 of the second electrode assembly 12 parallel to the width direction.
Referring to fig. 6, which is a schematic cross-sectional view of the battery 1a taken along the plane parallel to XZ in fig. 3, the width W1 of the first electrode assembly 11 parallel to the width direction shown in fig. 6 may be smaller than the width W2 of the second electrode assembly 12 parallel to the width direction.
Fig. 7 is an exploded view of a battery 1b according to a modified embodiment of the battery 1 a. Similarly to the battery 1, the battery 1b has a length direction, a width direction, and a thickness direction that are perpendicular two by two. The battery 1b and the battery 1a have substantially the same structure, and the first electrode assembly 11, the second electrode assembly 12, the first protective sheet 21 and the second protective sheet 22, and other elements or components of the battery 1a other than the packaging bag 30 may be applied to the battery 1 b. The main difference between the battery 1b and the battery 1a is that the packaging bag 30 of the battery 1b is a steel shell, which may have a plurality of assembly holes 301 for fixedly connecting with an external host. As can be understood by those skilled in the art, the embodiments of the present application are not described in detail. In this embodiment, the first protection plate 21 may be a high-rate electrode assembly protection plate, and the second protection plate 22 may be a low-rate electrode assembly protection plate, and since the protection circuit for high-rate charging is complex and requires a large layout space, the lengths of the two protection plates may not be equal to each other, so as to reduce the plate widths of the first protection plate 21 and the second protection plate 22, and fully utilize the packaging space. The battery 1b is connected to a main board at a host side through connectors (not numbered) on the first protection plate 11 and the second protection plate 12, and a charging and discharging sequence is controlled by the main board at the host side. The battery 1b of the present embodiment is compatible with the charging speed of a high-rate electrode assembly (e.g., the first electrode assembly 11) and the high-capacity characteristics of a low-rate electrode assembly (e.g., the second electrode assembly 12), and can satisfy both the requirements of rapid charging and high capacity.
Fig. 8 is an exploded view of a battery 1c according to a modified embodiment of the battery 1 a. The battery 1c and the battery 1a have substantially the same structure, and the main difference is that the first conductive unit 13 of the battery 1c includes three conductive tabs 103, and the second conductive unit 14 includes two conductive tabs 103. The three conductive tabs 103 of the first conductive unit 13 include 2 positive tabs and 1 negative tab, which can supply a larger current to meet different fast charging requirements. The present embodiment can be compatible with the charging speed of a high-rate electrode assembly (such as the first electrode assembly 11) and the high-capacity characteristics of a low-rate electrode assembly (such as the second electrode assembly 12). The first electrode assembly 11 can achieve a better quick charging effect through the three conductive tabs 103. Further, the top edge sealing part of the packaging bag of the battery 1c adopts the edge sealing process of bending towards the deep pit, so that the battery core capacity is further improved, and different requirements for quick charging and battery capacity improvement can be met. Of course, the present embodiment is not limited thereto, and in some embodiments, the first electrode assembly 11 and/or the second electrode assembly 12 may include two, three or more conductive tabs 103, which is not limited herein, but generally, the number of the conductive tabs 103 of the first electrode assembly 11 is greater than the number of the conductive tabs 103 of the second electrode assembly 12.
Referring to fig. 9, which is an exploded view of a battery 1d according to an embodiment of the present application, the battery 1d and the battery 1c have substantially the same structure, and the main difference is that the first conductive unit 13 of the battery 1d includes four tabs 103, and the four tabs 103 of the first conductive unit 13 extend from the same side (e.g., the top-sealed portion 31) of the packaging bag 30. The first protective plate assembly 211 includes a first protective plate 21, and the four tabs 103 of the first conductive unit 13 are connected to the first protective plate 21. The second protection plate assembly 222 protects the second protection plate 22 to which both tabs of the second conductive unit 14 are connected.
Referring to fig. 10, which is an exploded view of a battery 1e according to an embodiment of the present application, the battery 1e and the battery 1d have substantially the same structure, and the main difference is that the packaging bag includes a top seal portion 31 and a bottom seal portion 32, the first conductive unit 13 of the battery 1e includes four tabs 103, and the four tabs 103 of the first conductive unit 13 extend from two opposite sides (e.g., the top seal portion 31 and the bottom seal portion 32) of the packaging bag 30. The first protection plate assembly 211 includes a first protection plate 21 and a third protection plate 23, and the four tabs 103 of the first conductive unit 13 are respectively connected to the first protection plate 21 and the third protection plate 23. The second protection plate assembly 222 protects the second protection plate 22 to which both tabs of the second conductive unit 14 are connected. As shown in fig. 10, two tabs 103 in the first conductive unit 13 extend from the top-sealed portion 31 and are connected to the first protective sheet 21. Two tabs 103 of the first conductive unit 13 extend from the bottom-sealed edge portion 32 and are connected to the third protective plate 23.
Further embodiments of the present application also provide an electric device including the battery 1 in the above-described embodiments and modified embodiments. The powered device may include, but is not limited to, consumer electronics (mobile communication devices, laptops, tablets, wearable devices, etc.), drones, power tools, energy storage devices, electric bicycles, electric vehicles, and the like.
Although the application has been shown and described with respect to one or more implementations, equivalent alterations and modifications will occur to others skilled in the art based upon a reading and understanding of this specification and the annexed drawings. This application is intended to embrace all such modifications and variations and is limited only by the scope of the appended claims. In particular regard to the various functions performed by the above described components, the terms used to describe such components are intended to correspond, unless otherwise indicated, to any component which performs the specified function of the described component (e.g., that is functionally equivalent), even though not structurally equivalent to the disclosed structure which performs the function in the herein illustrated exemplary implementations of the specification. In addition, while a particular feature of the specification may have been disclosed with respect to only one of several implementations, such feature may be combined with one or more other features of the other implementations as may be desired and advantageous for a given or particular application. Further, it is understood that reference to "a plurality" herein means two or more. For the steps mentioned herein, the numerical suffixes are merely used for clearly expressing the embodiments, and for easy understanding, the order of execution of the steps is not fully represented, and the logical relationship should be set as consideration.
The above-mentioned embodiments are only examples of the present application, and not intended to limit the scope of the present application, and all equivalent structures or equivalent flow transformations made by the contents of the specification and the drawings, such as the combination of technical features between the embodiments and the direct or indirect application to other related technical fields, are also included in the scope of the present application.
Claims (14)
1. A battery, comprising:
a first electrode assembly and a first conductive element electrically connected therebetween;
a second electrode assembly and a second conductive element electrically connected therebetween;
a packaging bag housing the first electrode assembly and the second electrode assembly, the first conductive unit and the second conductive unit respectively extending outwardly from the first electrode assembly and the second electrode assembly to an exterior of the packaging bag;
a first protective plate assembly located outside the package bag, the first protective plate assembly being electrically connected to the first conductive unit;
the second protection plate assembly is positioned outside the packaging bag and is electrically connected with the second conductive unit;
wherein the first and second protection plate assemblies have a plate-shaped structure extending in a predetermined direction, and any one plate surface of the first protection plate assembly faces the first electrode assembly and any one plate surface of the second protection plate assembly faces the second electrode assembly.
2. The battery of claim 1, wherein the first electrode assembly has a first charge rate and the second electrode assembly has a second charge rate, the first charge rate being greater than the second charge rate.
3. The battery of claim 2, wherein the first electrode assembly has a charge rate of 1C to 10C and the second electrode assembly has a charge rate of less than 1C.
4. The battery of claim 2, wherein the first protective plate assembly comprises a first protective plate and the second protective plate assembly comprises a second protective plate, wherein a length of the first protective plate in the predetermined direction is greater than a length of the second protective plate in the predetermined direction.
5. The battery according to claim 1, wherein the battery has a length direction, a width direction and a thickness direction perpendicular to each other two by two, and the preset direction is parallel to the width direction of the battery; the wrapping bag is the plastic-aluminum membrane, the wrapping bag includes the edge the relative top banding portion and the bottom that sets up of length direction, edge two lateral parts that width direction set up relatively, edge the relative pit and the shallow pit that set up of thickness direction, top banding portion orientation pit or shallow pit are buckled, first protection board subassembly with the face orientation of second protection board subassembly top banding portion.
6. The battery of claim 1, further comprising a separator between the first electrode assembly and the second electrode assembly.
7. The battery of claim 1, wherein the first conductive element includes two tabs and the second conductive element includes two tabs; or, the first conductive unit comprises three tabs, and the second conductive unit comprises two tabs; or, the first conductive unit comprises four tabs, and the second conductive unit comprises two tabs.
8. The battery of claim 1, wherein the first conductive element extends from a same side of the pouch or from opposite sides of the pouch; the second conductive element extends from the same side of the package or extends from opposite sides of the package.
9. The battery of claim 1, wherein the first conductive element includes three or four tabs, the tabs of the first conductive element extending from the same side of the pouch, the first protective plate assembly includes a first protective plate coupled to the tabs of the first conductive element on the same side of the pouch, and the second protective plate assembly includes a second protective plate coupled to the second conductive element; or, first electrically conductive unit's utmost point ear is followed respectively the relative both sides of wrapping bag extend out, first protection shield subassembly includes first protection shield and third protection shield, first protection shield with the third protection shield is connected respectively and is located the utmost point ear of the first electrically conductive unit of the relative both sides of wrapping bag, second protection shield subassembly includes the second protection shield, the second protection shield with the electrically conductive unit of second is connected.
10. The battery of claim 1, wherein the first guard plate assembly includes a portion opposite the first electrode assembly and a portion opposite the second electrode assembly, and the second guard plate assembly includes a portion opposite the second electrode assembly; or, the first protection plate assembly includes a portion opposite to the first electrode assembly and a portion opposite to the second electrode assembly, the second protection plate assembly includes a portion opposite to the first electrode assembly and a portion opposite to the second electrode assembly, and the first protection plate assembly and the second protection plate assembly are alternately arranged.
11. The battery according to claim 1, wherein the battery has a length direction, a width direction, and a thickness direction perpendicular to each other two by two, the preset direction is parallel to the width direction of the battery, and the first electrode assembly and the second electrode assembly are arranged side by side in the length direction or the width direction or the thickness direction.
12. The battery of claim 1, wherein the first electrode assembly and the second electrode assembly differ in a dimension, the dimension being at least one of a length or a width or a thickness.
13. The battery of claim 1, wherein the package bag is a steel can.
14. An electrical device comprising a battery according to any one of claims 1 to 13.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110447476.XA CN113193308A (en) | 2021-04-23 | 2021-04-23 | Battery and electric equipment thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110447476.XA CN113193308A (en) | 2021-04-23 | 2021-04-23 | Battery and electric equipment thereof |
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| CN113193308A true CN113193308A (en) | 2021-07-30 |
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| CN202110447476.XA Pending CN113193308A (en) | 2021-04-23 | 2021-04-23 | Battery and electric equipment thereof |
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