CN115280587A - Battery unit and electric power-assisted vehicle - Google Patents
Battery unit and electric power-assisted vehicle Download PDFInfo
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- CN115280587A CN115280587A CN202180008178.9A CN202180008178A CN115280587A CN 115280587 A CN115280587 A CN 115280587A CN 202180008178 A CN202180008178 A CN 202180008178A CN 115280587 A CN115280587 A CN 115280587A
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- battery
- cell
- cell module
- cells
- battery pack
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 74
- 229910052759 nickel Inorganic materials 0.000 claims description 37
- 238000005192 partition Methods 0.000 claims description 6
- 229910003460 diamond Inorganic materials 0.000 claims 1
- 239000010432 diamond Substances 0.000 claims 1
- 239000000178 monomer Substances 0.000 abstract description 44
- 230000004888 barrier function Effects 0.000 description 6
- 239000000306 component Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 2
- 239000008358 core component Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Classifications
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J43/00—Arrangements of batteries
- B62J43/10—Arrangements of batteries for propulsion
- B62J43/13—Arrangements of batteries for propulsion on rider-propelled cycles with additional electric propulsion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J43/00—Arrangements of batteries
- B62J43/10—Arrangements of batteries for propulsion
- B62J43/16—Arrangements of batteries for propulsion on motorcycles or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J43/00—Arrangements of batteries
- B62J43/20—Arrangements of batteries characterised by the mounting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
- B62M6/80—Accessories, e.g. power sources; Arrangements thereof
- B62M6/90—Batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
-
- 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
Abstract
A battery unit and an electric bicycle. The battery unit comprises a battery cell assembly (1), the battery cell assembly (1) comprises a plurality of battery cell modules (11), the plurality of battery cell modules (11) comprise first battery cell modules (111), the first battery cell modules (111) comprise first battery packs (100) formed by a plurality of first battery monomers (101) which are arranged in parallel and second battery packs (200) formed by a plurality of second battery monomers (102) which are arranged in parallel, and the first battery packs (100) and the second battery packs (200) are arranged in series; the axial distance between different adjacent battery cells between the first battery pack (100) and the second battery pack (200) is A, the axial distance between the same adjacent battery cells between the first battery pack (100) and the second battery pack (200) is B, the diameters of the battery cells of the first battery cell (101) and the second battery cell (102) are C, and then A, B and C satisfy the following dimensional relationship: b is more than A and less than C and D, and the value range of D is more than or equal to 1mm and less than or equal to 3mm; b is more than C and less than C and E, and the value range of E is more than or equal to 0.1mm and less than or equal to 0.6mm.
Description
Technical Field
The present invention relates to the field of storage batteries, and for example, to a battery unit and an electric power-assisted vehicle.
Background
An electric power-assisted vehicle is a mechatronics personal transportation tool which takes a storage battery as auxiliary energy and is provided with a motor, a controller, a display instrument system, a rotating handle, a brake handle and other control components on the basis of a common bicycle. The electric moped has the advantages of light weight, environmental protection, energy conservation and the like, and is popular among more and more consumers.
The battery is used as a core component for providing energy for the electric moped, the pursuit of large capacity is a common demand of consumers, and the large volume brought by the large capacity directly influences the attractive design and the weight of the electric moped and is not beneficial to reducing the energy consumption. In order to improve the aesthetic property of the whole vehicle, the battery of the electric bicycle is designed by placing a battery unit in a frame tube. However, the series-parallel connection layout of the battery cells of the battery unit is poor, so that the whole battery unit has a large volume and low energy density, and the requirements of size limitation and light weight design of the frame tube cannot be met.
Disclosure of Invention
The application provides a battery unit and electric bicycle occupies smallly, and battery capacity is big, and energy density is high, satisfies the size restriction of car frame pipe and the demand of lightweight design.
The application provides a battery unit, which comprises a battery cell assembly, wherein the battery cell assembly comprises a plurality of battery cell modules, the plurality of battery cell modules comprise a first battery cell module, the first battery cell module comprises a first battery pack consisting of a plurality of first battery monomers arranged in parallel and a second battery pack consisting of a plurality of second battery monomers arranged in parallel, and the first battery pack and the second battery pack are arranged in series;
the first group battery with the adjacent free axis interval of the different group battery between the second group battery is A, the first group battery with the adjacent free axis interval of the same group battery between the second group battery is B, the first battery monomer with the free battery monomer diameter of second battery is C, then A, B and C satisfy following dimensional relationship:
b is more than A and less than C and D, wherein D is a first spacing value, and the value range of D is more than or equal to 1mm and less than or equal to 3mm;
b is more than C and less than C + E, wherein E is a second spacing value, and the value range of E is more than or equal to 0.1mm and less than or equal to 0.6mm.
As an alternative to the battery unit of the present application, the plurality of cell modules further includes a second cell module;
the first battery cell module and the second battery cell module respectively comprise a third battery cell, the third battery cells of the first battery cell module and the second battery cell module are connected in parallel to form a third battery pack, and the first battery pack, the second battery pack and the third battery pack are connected in series.
As an alternative of the battery unit of the present application, the first battery pack, the second battery pack, and the third battery pack have the same axial distance between adjacent cells in different groups, and the first battery pack, the second battery pack, and the third battery pack have the same axial distance between adjacent cells in the same group.
As the alternative of the battery unit of this application, first electric core module with second electric core module all includes four first battery monomer, four second battery monomer and two third battery monomer, four first battery monomer, four second battery monomer and two third battery monomer is the three rows and superposes and arranges, two first battery monomer and one second battery monomer arranges side by side and forms first row, two first battery monomer and two second battery monomer arranges side by side and forms the second row, two third battery monomer and one second battery monomer arranges side by side and forms the third row, four the free battery monomer centre of a circle of first battery and four the free battery monomer centre of a circle of second battery all is the rhombus and distributes.
As an alternative of the battery unit of the present application, the first battery cell module and the second battery cell module each include a first battery support and a second battery support that are detachably connected, a receiving space is formed between the first battery support and the second battery support, and the first battery cell, the second battery cell and the third battery cell are located in the receiving space.
As an alternative of the battery unit of the present application, a card slot structure is provided on one of the first battery support and the second battery support, and a card protrusion structure matched with the card slot structure is provided on the other.
As an alternative of the battery unit of this application, the first battery cell module and the second battery cell module each further include a first nickel plate and a second nickel plate, the first nickel plate is disposed on one side of the second battery bracket away from the first battery bracket, the second nickel plate is disposed on one side of the first battery bracket away from the second battery bracket, the first nickel plate is respectively connected with the free positive electrode of the first battery, the free positive electrode of the second battery and the free positive electrode of the third battery, and the second nickel plate is respectively connected with the free negative electrode of the first battery, the free negative electrode of the second battery and the free negative electrode of the third battery.
As the battery unit's of this application alternative, first electric core module with be provided with coupling assembling between the second electric core module, coupling assembling is including dismantling the insulating barrier and the joint piece of connection, one side of insulating barrier with first electric core module the second nickel piece pastes and leans on, insulating barrier's opposite side with second electric core module first nickel piece pastes and leans on, one side of joint piece with first electric core module the second battery support joint, the opposite side of joint piece with the second electric core module the first battery support joint.
As the battery unit's of this application alternative, electric core assembly still includes first splint, second splint and locking screw, a plurality of electric core module is located first splint with between the second splint, locking screw runs through a plurality of in proper order electric core module, locking screw's one end with first splint are connected, locking screw's the other end with second splint are connected.
As the battery unit's of this application alternative, the battery unit still includes casing assembly, casing assembly includes shell section bar, first end cover and second end cover, first end cover shutoff in the one end of shell section bar, the second end cover shutoff in the other end of shell section bar, electric core assembly is located in the shell section bar.
The application also provides an electric moped, and the whole vehicle is small in size, light in weight and strong in cruising ability.
The application also provides an electric moped, which comprises the battery unit.
In the battery unit provided by the application, the first battery cell module comprises a first battery pack and a second battery pack, wherein the first battery pack is composed of a plurality of first battery monomers which are arranged in parallel, the second battery pack is composed of a plurality of second battery monomers which are arranged in parallel, and the first battery pack and the second battery pack are arranged in series; the free axis interval of the adjacent battery of different groups between first group battery and the second group battery is A, and the free axis interval of the adjacent battery of the same group between first group battery and the second group battery is B, and the free battery monomer diameter of first battery and second battery is C, then A, B and C satisfy following size relation: b is more than A and less than C and D, and the value range of D is more than or equal to 1mm and less than or equal to 3mm; c is less than B and less than C + E, the value range of E is more than or equal to 0.1mm and less than or equal to 0.6mm, the cross section size and the whole size of a battery unit are reduced through the series-parallel connection layout and the structural design of battery monomers in the battery cell module, the maximization of the battery capacity and the high density of the battery energy are ensured in a limited space, and meanwhile, the good performance and the safe reliability of the battery are ensured, so that the requirements of the size limitation and the light weight design of the vehicle frame tube are met. The battery unit that this application provided occupies smallly, battery capacity is big and energy density is high.
The application provides an electric bicycle, including foretell battery unit, because battery unit occupy small, battery capacity is big and energy density is high for whole car is small, light in weight, and duration is strong, and is pleasing to the eye practical, and safe and reliable has satisfied user's lightweight demand and the demand of a specified duration simultaneously.
Drawings
Fig. 1 is an exploded schematic view of a battery cell provided in an embodiment of the present application;
FIG. 2 is a schematic diagram of a battery cell according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a cell module in a battery unit according to an embodiment of the present disclosure;
fig. 4 is an exploded schematic view of a cell module in a battery unit provided in an embodiment of the present application;
fig. 5 is a schematic structural diagram of a first cell module or a second cell module in a battery unit provided in an embodiment of the present application;
fig. 6 is an exploded view of a first cell module or a second cell module in a battery unit according to an embodiment of the present disclosure;
fig. 7 is a schematic layout diagram of a first battery cell, a second battery cell, and a third battery cell in a battery unit provided in the embodiment of the present application.
In the figure:
1-a cell assembly; 2-a housing assembly; 3-a power management module;
11-a cell module; 12-a first splint; 13-a second splint; 14-locking screw rod;
111-a first cell module; 112-a second cell module; 113-a connecting assembly;
101-a first battery cell; 102-a second battery cell; 103-a third battery cell; 104-a first battery holder; 1041-a card slot structure; 105-a second battery holder; 1051-a snap-projection structure; 106-a first nickel plate; 107-a second nickel sheet; 108-a buffer shim;
1131 — insulating spacer; 1132-card block;
21-shell profile; 22-a first end cap; 23-a second end cap;
100-a first battery pack; 200-a second battery pack; 300-third battery pack.
Detailed Description
The technical solutions of the embodiments of the present application will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
At present, the series-parallel connection layout of the battery monomers of the battery unit is poor, so that the whole battery unit is large in volume and low in energy density, and the requirements of size limitation and light-weight design of a frame tube of an electric moped cannot be met.
As shown in fig. 1 to 7, the present embodiment provides a battery unit, which has a small size, a large battery capacity, and a high energy density, and can be used in electrically driven vehicles such as an electric bicycle, and in particular, the battery unit can be built in a frame tube of the electric bicycle to keep the appearance and weight of the whole vehicle. The battery unit comprises a battery cell assembly 1, wherein the battery cell assembly 1 is used as a core component of the battery unit, the battery cell assembly 1 comprises a plurality of battery cell modules 11, the plurality of battery cell modules 11 comprise a first battery cell module 111 and a second battery cell module 112, and the first battery cell module 111 and the second battery cell module 112 respectively comprise a first battery cell 101, a second battery cell 102 and a third battery cell 103. In the present embodiment, the cell assembly 1 includes four cell modules 11, the four cell modules 11 include two first cell modules 111 and two second cell modules 112, and the first cell modules 111 and the second cell modules 112 are arranged in a staggered manner. In other embodiments, the number of the battery cell modules 11 of each battery cell assembly 1 may be set to other numbers according to the electric quantity requirement of the electric moped and the personalized customization requirement of the user.
As shown in fig. 7, in this embodiment, the axial distance between the adjacent different groups of single batteries between the first battery pack 100, the second battery pack 200, and the third battery pack 300 is a, the axial distance between the adjacent same group of single batteries between the first battery pack 100, the second battery pack 200, and the third battery pack 300 is B, and the diameters of the single batteries of the first single battery 101, the second single battery 102, and the third single battery 103 are all C, then a, B, and C satisfy the following dimensional relationships:
b is more than A and less than C + D, wherein D is a first distance value, D is within a range of 1 mm-3 mm, and optionally D =2mm;
c is more than B and less than C + E, wherein E is a second distance value, the value range of E is more than or equal to 0.1mm and less than or equal to 0.6mm, and optionally E =0.5mm.
When A, B and C satisfy the above dimensional relationship, the design size of the whole battery unit is smaller, the volume-to-volume density ratio of the capacity is larger, and the small-volume large-capacity battery is realized. In addition, the axial line distance B between the adjacent battery monomers in the same group is smaller than the axial line distance A between the adjacent battery monomers in the different group, and the battery monomers in the same group are arranged in parallel, so that the battery monomers in the same group are not short-circuited while the capacity-volume-density ratio is higher. In addition, because the battery packs are arranged in series, and B is less than A, short circuit between the battery packs can be prevented, and the reliability and the safety performance of the battery are ensured.
As shown in fig. 7, it should be noted that the axial distance a between adjacent battery cells in different battery packs refers to a distance between two adjacent battery cells (for example, a first battery cell 101 and a second battery cell 102, a second battery cell 102 and a third battery cell 103, or a first battery cell 101 and a third battery cell 103) of the same battery module 11 (a first battery cell 111 or a second battery cell 112) (for example, a first battery cell 100 and a second battery cell 200, or a second battery cell 200 and a third battery cell 300, or a first battery cell 100 and a third battery cell 300), for example, a distance between an axial line of a first battery cell 101 of a first battery pack 100 of the first battery cell module 111 and an axial line of a second battery cell 102 of a second battery pack 200 adjacent thereto, that is, i.e., an axial distance a between the adjacent battery cells in the different battery pack.
It is understood that the inter-axis distance B between adjacent battery cells in the same group refers to a distance between axes of two adjacent battery cells (e.g., the first battery cell 101 and the first battery cell 101, or the second battery cell 102 and the second battery cell 102, or the third battery cell 103 and the third battery cell 103) in the same battery pack (e.g., the first battery pack 100, the second battery pack 200, or the third battery pack 300) of the same battery cell module 11 (e.g., the first battery cell 111 or the second battery cell 112), for example, a distance between an axis of the first battery cell 101 of the first battery pack 100 of the first battery cell module 111 and an axis of the first battery cell 101 of the first battery pack 100 adjacent thereto, i.e., the inter-axis distance B between the adjacent battery cells in the same group.
As shown in fig. 5 and 7, in this embodiment, in order to improve space utilization and energy density, each of the first cell module 111 and the second cell module 112 includes four first battery cells 101, four second battery cells 102, and two third battery cells 103, the four first battery cells 101, the four second battery cells 102, and the two third battery cells 103 are stacked in three rows, the two first battery cells 101 and the one second battery cell 102 are arranged in parallel to form a first row, the two first battery cells 101 and the two second battery cells 102 are arranged in parallel to form a second row, the two third battery cells 103 and the one second battery cell 102 are arranged in parallel to form a third row, and centers of the four first battery cells 101 and centers of the four second battery cells 102 are both distributed in a rhombic shape.
In order to improve the battery performance and the batch processing efficiency, optionally, the axial distances of different groups of adjacent single batteries of the first battery pack 100, the second battery pack 200 and the third battery pack 300 are the same, and the axial distances of the same group of adjacent single batteries of the first battery pack 100, the second battery pack 200 and the third battery pack 300 are the same.
The first battery cell 101, the second battery cell 102, and the third battery cell 103 may be cylindrical lithium batteries, that is, in this embodiment, the entire cell assembly 1 includes 40 cylindrical lithium batteries, because the first battery pack 100, the second battery pack 200, and the third battery pack 300 are connected in parallel, and a combination manner of series connection between different battery packs is adopted, 4 first battery cells 101 are connected in parallel to form the first battery pack 100,4 second battery cells 102 are connected in parallel to form the second battery pack 200, and 2 third battery cells 103 of the first cell module 111 and 2 third battery cells 103 of the second cell module 112 are connected in parallel to form the third battery pack 300, so that the first cell module 111 or the second cell module 112 forms a battery series-parallel connection manner of 4-2.5 strings, a battery series-parallel connection manner of 4-10 strings of the entire cell assembly 1 is realized, and a space utilization rate of the battery units is improved.
Of course, in other embodiments, other numbers of the first battery cell 101, the second battery cell 102 and the third battery cell 103 may be selected according to the size limitation and the light weight requirement of the frame tube.
As shown in fig. 1 and fig. 2, the battery unit may further include a casing component 2, where the casing component 2 includes a casing section 21, a first end cap 22, and a second end cap 23, the first end cap 22 is plugged at one end of the casing section 21, the second end cap 23 is plugged at the other end of the casing section 21, and the cell assembly 1 is located in the casing section 21. During assembly, the battery cell assembly 1 is firstly installed in the shell section bar 21, then the first end cover 22 is fixedly connected with the shell section bar 21 through the screw, the first end cover 22 is enabled to plug one end of the shell section bar 21, the second end cover 23 is fixedly connected with the shell section bar 21 through the screw, and the second end cover 23 is enabled to plug the other end of the shell section bar 21, so that the battery cell assembly 1 is protected in all directions, the damage of the battery cell assembly 1 is prevented, and the service life of a battery unit is prolonged. In this embodiment, in order to conveniently control the charging and discharging management of each battery cell, the battery unit may further include a power management module 3, and the power management module 3 performs the charging and discharging management on each battery cell to achieve high energy utilization efficiency, which is related to the prior art and is not described herein again.
In order to prevent the battery cell modules 11 from shaking to affect the performance of the battery, the battery cell assembly 1 may further include a first clamping plate 12, a second clamping plate 13 and a locking screw 14, the plurality of battery cell modules 11 are located between the first clamping plate 12 and the second clamping plate 13, the locking screw 14 sequentially penetrates through the plurality of battery cell modules 11, one end of the locking screw 14 is connected with the first clamping plate 12, and the other end of the locking screw 14 is connected with the second clamping plate 13. The middle part of the locking screw rod 14 is a polished rod, and the two ends of the locking screw rod 14 are respectively provided with a thread section so as to be conveniently in threaded connection with nuts, and the nuts at the two ends clamp the first clamping plate 12 and the second clamping plate 13 tightly, so that the plurality of cell modules 11 between the first clamping plate 12 and the second clamping plate 13 are fixed. In this embodiment, four locking screws 14 are provided, which can ensure sufficient fixing force on the battery cell module 11 and make full use of the limited space.
As shown in fig. 5 and fig. 6, optionally, each of the first cell module 111 and the second cell module 112 includes a first battery support 104 and a second battery support 105 that are detachably connected, an accommodation space is formed between the first battery support 104 and the second battery support 105, and each of the first battery cell 101, the second battery cell 102, and the third battery cell 103 is located in the accommodation space. In this embodiment, each of the first battery bracket 104 and the second battery bracket 105 is provided with ten receiving grooves, one battery cell is placed in each receiving groove, and the series-parallel layout design of the first battery cell 101, the second battery cell 102 and the third battery cell 103 is realized through the structural design of the receiving grooves. The first battery support 104 and the second battery support 105 may be plastic injection molded parts, which facilitates mass production.
Optionally, a card slot structure 1041 is provided on one of the first battery support 104 and the second battery support 105, and a card protrusion structure 1051 matched with the card slot structure 1041 is provided on the other. In this embodiment, the slot structures 1041 are disposed on the first battery support 104 and are disposed in a plurality along the circumferential direction of the first battery support 104, and the protruding structures 1051 are disposed on the second battery support 105 and are disposed in a plurality along the circumferential direction of the second battery support 105. During the equipment, earlier place a plurality of first battery monomer 101, second battery monomer 102 and third battery monomer 103 respectively in the holding tank of first battery support 104 (or second battery support 105), rethread draw-in groove structure 1041 and the protruding structure 1051's of card buckle form cooperation are connected as an organic wholely second battery support 105 (or first battery support 104) and first battery support 104 (or second battery support 105), and simple installation is swift, has improved assembly efficiency.
For the assembly degree of difficulty that reduces first battery monomer 101, second battery monomer 102 and third battery monomer 103 and reduce first battery support 104 and second battery support 105's processing requirement, all be provided with buffer spacer 108 in first battery support 104 and second battery support 105's the holding tank for effort during the buffering installation, buffer spacer 108 can adopt soft cushion, prevents to damage the battery monomer.
Optionally, each of the first cell module 111 and the second cell module 112 further includes a first nickel plate 106 and a second nickel plate 107, the first nickel plate 106 is disposed on one side of the first battery support 104 away from the second battery support 105, the second nickel plate 107 is disposed on one side of the second battery support 105 away from the first battery support 104, the first nickel plate 106 is connected to a positive electrode of the first battery cell 101, a positive electrode of the second battery cell 102, and a positive electrode of the third battery cell 103, and the second nickel plate 107 is connected to a negative electrode of the first battery cell 101, a negative electrode of the second battery cell 102, and a negative electrode of the third battery cell 103. The first nickel plate 106 and the second nickel plate 107 may be an integral nickel plate or may be composed of a plurality of independent nickel plates. The shapes of the first nickel plate 106 and the second nickel plate 107 may be adapted to the series-parallel arrangement of the first battery cell 101, the second battery cell 102, and the third battery cell 103.
In this embodiment, to improve the battery reliability, the first nickel plate 106 is connected to the positive electrode of the first battery cell 101, the positive electrode of the second battery cell 102, and the positive electrode of the third battery cell 103 by welding, and the second nickel plate 107 is connected to the negative electrode of the first battery cell 101, the negative electrode of the second battery cell 102, and the negative electrode of the third battery cell 103 by welding. In other embodiments, the connection may also be made in the form of a lap joint. In addition, under the buffer action of the buffer gasket 108, the reliability of welding the nickel sheet and the battery cell electrode is improved.
As shown in fig. 3 and fig. 4, optionally, a connection assembly 113 is disposed between the first cell module 111 and the second cell module 112, the connection assembly 113 includes an insulating partition 1131 and a clamping block 1132, which are detachably connected, one side of the insulating partition 1131 is attached to the second nickel plate 107 of the first cell module 111, the other side of the insulating partition 1131 is attached to the first nickel plate 106 of the second cell module 112, one side of the clamping block 1132 is clamped with the second battery support 105 of the first cell module 111, and the other side of the clamping block 1132 is clamped with the first battery support 104 of the second cell module 112. In this embodiment, the joint blocks 1132 are provided with two, during the assembly, first press from both sides tight insulating barrier 1131 of two joint blocks 1132, move to one side of insulating barrier 1131 again jointly and paste with the second nickel piece 107 of first electric core module 111 and lean on, simultaneously, one side of joint block 1132 and the second battery support 105 joint of first electric core module 111, move to the opposite side of insulating barrier 1131 again jointly and paste with the first nickel piece 106 of second electric core module 112 and lean on, simultaneously, the opposite side of joint block 1132 and the first battery support 104 joint of second electric core module 112.
The battery unit that this embodiment provided occupies smallly, battery capacity is big and energy density is high, through to the free series-parallel connection overall arrangement of battery and structural design in electric core module 11, has reduced battery unit cross-sectional dimension and overall dimension, has ensured the maximize of battery capacity and the high density of battery energy in limited space, has ensured battery functional property and fail safe nature simultaneously to satisfy the size restriction of car frame pipe and the demand of lightweight design.
The embodiment also provides an electric moped, which comprises the battery unit, a motor, a controller, a display instrument system, a rotating handle, a brake handle and other operation components, wherein the battery unit provides electric energy for the motor, the controller, the display instrument system and the operation components, the display instrument system is used for displaying the residual electric quantity of the battery, the rotating handle, the brake handle and other operation components are used for a rider to operate and input an operation instruction, the controller controls the motor to rotate according to the operation instruction, the speed adjustment is realized, and the description is omitted herein for related technologies. Because the battery unit occupies smallly, battery capacity is big and energy density is high for whole car is small, light in weight, and duration is strong, and is pleasing to the eye practical, safe and reliable, has satisfied user's lightweight demand and duration demand simultaneously.
Claims (11)
1. A battery unit, characterized by comprising a cell assembly (1), wherein the cell assembly (1) comprises a plurality of cell modules (11), the plurality of cell modules (11) comprises a first cell module (111), the first cell module (111) comprises a first battery pack (100) composed of a plurality of first battery cells (101) arranged in parallel and a second battery pack (200) composed of a plurality of second battery cells (102) arranged in parallel, and the first battery pack (100) and the second battery pack (200) are arranged in series;
the axial distance between different groups of adjacent single batteries between the first battery pack (100) and the second battery pack (200) is A, the axial distance between the same group of adjacent single batteries between the first battery pack (100) and the second battery pack (200) is B, the diameters of the single batteries of the first single battery (101) and the second single battery (102) are C, and then A, B and C satisfy the following dimensional relationship:
b is more than A and less than C and D, wherein D is a first spacing value, and the value range of D is more than or equal to 1mm and less than or equal to 3mm;
b is more than C and less than C + E, wherein E is a second spacing value, and the value range of E is more than or equal to 0.1mm and less than or equal to 0.6mm.
2. The battery unit of claim 1, wherein the number of cell modules (11) further comprises a second cell module (112);
the first battery cell module (111) and the second battery cell module (112) each include a third battery cell (103), a plurality of the third battery cells (103) of the first battery cell module (111) and a plurality of the third battery cells (103) of the second battery cell module (112) are connected in parallel to form a third battery pack (300), and the first battery pack (100), the second battery pack (200), and the third battery pack (300) are connected in series.
3. The battery unit according to claim 2, wherein the first battery pack (100), the second battery pack (200) and the third battery pack (300) have the same axial distance between adjacent cells of different groups, and the first battery pack (100), the second battery pack (200) and the third battery pack (300) have the same axial distance between adjacent cells of the same group.
4. The battery unit according to claim 2, wherein each of the first cell module (111) and the second cell module (112) comprises four first battery cells (101), four second battery cells (102) and two third battery cells (103), the four first battery cells (101), the four second battery cells (102) and the two third battery cells (103) are stacked in three rows, the two first battery cells (101) and the one second battery cell (102) are arranged in parallel to form a first row, the two first battery cells (101) and the two second battery cells (102) are arranged in parallel to form a second row, the two third battery cells (103) and the one second battery cell (102) are arranged in parallel to form a third row, and the centers of the four first battery cells (101) and the centers of the four second battery cells (102) are all distributed in a diamond shape.
5. The battery unit according to any one of claims 2-4, wherein each of the first cell module (111) and the second cell module (112) comprises a first battery support (104) and a second battery support (105) which are detachably connected, a receiving space is formed between the first battery support (104) and the second battery support (105), and the first battery cell (101), the second battery cell (102) and the third battery cell (103) are located in the receiving space.
6. The battery unit according to claim 5, characterized in that a card slot structure (1041) is provided on one of the first battery holder (104) and the second battery holder (105), and a card projection structure (1051) cooperating with the card slot structure (1041) is provided on the other.
7. The battery unit according to claim 5, wherein each of the first cell module (111) and the second cell module (112) further comprises a first nickel sheet (106) and a second nickel sheet (107), the first nickel sheet (106) is disposed on a side of the first battery support (104) away from the second battery support (105), the second nickel sheet (107) is disposed on a side of the second battery support (105) away from the first battery support (104), the first nickel sheet (106) is respectively connected with a positive electrode of the first battery cell (101), a positive electrode of the second battery cell (102), and a positive electrode of the third battery cell (103), and the second nickel sheet (107) is respectively connected with a negative electrode of the first battery cell (101), a negative electrode of the second battery cell (102), and a negative electrode of the third battery cell (103).
8. The battery unit according to claim 6, wherein a connection assembly (113) is disposed between the first cell module (111) and the second cell module (112), the connection assembly (113) includes a detachably connected insulating partition plate (1131) and a clamping block (1132), one side of the insulating partition plate (1131) is attached to the second nickel plate (107) of the first cell module (111), the other side of the insulating partition plate (1131) is attached to the first nickel plate (106) of the second cell module (112), one side of the clamping block (1132) is clamped to the second battery support (105) of the first cell module (111), and the other side of the clamping block (1132) is clamped to the first battery support (104) of the second cell module (112).
9. The battery unit according to claim 1, wherein the cell assembly (1) further comprises a first clamping plate (12), a second clamping plate (13) and a locking screw (14), the plurality of cell modules (11) are located between the first clamping plate (12) and the second clamping plate (13), the locking screw (14) sequentially penetrates through the plurality of cell modules (11), one end of the locking screw (14) is connected with the first clamping plate (12), and the other end of the locking screw (14) is connected with the second clamping plate (13).
10. The battery unit according to claim 1, characterized in that the battery unit further comprises a housing assembly (2), the housing assembly (2) comprises a housing profile (21), a first end cap (22) and a second end cap (23), the first end cap (22) is sealed at one end of the housing profile (21), the second end cap (23) is sealed at the other end of the housing profile (21), and the cell assembly (1) is located in the housing profile (21).
11. An electric power-assisted vehicle, characterized by comprising the battery unit according to any one of claims 1 to 10.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2021/110718 WO2023010376A1 (en) | 2021-08-05 | 2021-08-05 | Battery unit and electric bicycle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115280587A true CN115280587A (en) | 2022-11-01 |
| CN115280587B CN115280587B (en) | 2023-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202180008178.9A Active CN115280587B (en) | 2021-08-05 | 2021-08-05 | Battery unit and electric power-assisted vehicle |
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| Country | Link |
|---|---|
| CN (1) | CN115280587B (en) |
| DE (1) | DE112021007644T5 (en) |
| WO (1) | WO2023010376A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2023010376A1 (en) | 2023-02-09 |
| DE112021007644T5 (en) | 2024-03-07 |
| CN115280587B (en) | 2023-11-17 |
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