WO2021253355A1 - 电池外壳及带有该电池外壳的电池包 - Google Patents

电池外壳及带有该电池外壳的电池包 Download PDF

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Publication number
WO2021253355A1
WO2021253355A1 PCT/CN2020/096891 CN2020096891W WO2021253355A1 WO 2021253355 A1 WO2021253355 A1 WO 2021253355A1 CN 2020096891 W CN2020096891 W CN 2020096891W WO 2021253355 A1 WO2021253355 A1 WO 2021253355A1
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WO
WIPO (PCT)
Prior art keywords
battery
groove
housing
side wall
battery pack
Prior art date
Application number
PCT/CN2020/096891
Other languages
English (en)
French (fr)
Inventor
吴明杰
周权
邵长健
Original Assignee
东莞新能安科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 东莞新能安科技有限公司 filed Critical 东莞新能安科技有限公司
Priority to PCT/CN2020/096891 priority Critical patent/WO2021253355A1/zh
Priority to CN202080101954.5A priority patent/CN115699425A/zh
Priority to EP20940913.5A priority patent/EP4152498A4/en
Publication of WO2021253355A1 publication Critical patent/WO2021253355A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—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
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/258—Modular batteries; Casings provided with means for assembling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
    • H01M50/287—Fixing of circuit boards to lids or covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • This application relates to the field of batteries, and in particular to a battery casing and a battery pack with the battery casing.
  • Lithium-ion batteries have the characteristics of high energy density, many cycles, and long storage time. Therefore, they have great development prospects in consumer electronics, electric vehicles, smart energy storage equipment, electric bicycles, large drones and electric vehicles. .
  • the battery pack must be filled with glue to realize the fixation of the entire module.
  • the glue filling operation requires a large amount of glue. After the glue filling, the energy density of the battery is reduced, the heat dissipation is poor, and the cost of the glue filling is higher.
  • the embodiment of the present application provides a battery housing for accommodating a plurality of stacked battery cells and circuit boards, including a first housing and a second housing.
  • the first shell and the second shell form an accommodating cavity for accommodating a plurality of electric cores and circuit boards.
  • the first housing includes a first bottom wall, a first top wall, a first side wall connecting the first bottom wall and the first top wall, and connecting the first bottom wall, the first top wall, and the first side wall.
  • the first side wall is provided with a first groove for accommodating one or more of the battery cores.
  • the second housing includes a second bottom wall, a second top wall, a second side wall connecting the second bottom wall and the second top wall, and connecting the second bottom wall, the second top wall, and the second side wall.
  • the second side wall is provided with a second groove for accommodating one or more of the battery cores.
  • the first groove is used to accommodate one side of one or more of the battery cores
  • the second groove is used to accommodate one or more opposite sides of the battery core. One side.
  • the contours of the first groove and the second groove match the side contours of the one or more cells.
  • At least one of the peripheral walls of the first housing and the second housing is provided with a sealing groove on a side opposite to the other housing, and the sealing groove is used for accommodating a connecting object so as to The first housing is fixed to the second housing.
  • At least one wall of the first housing and the second housing is further provided with a through hole, and the through hole is used for the external wiring harness to extend into the accommodating cavity.
  • At least one of the first side wall and the second side wall is provided with a fixing structure for fixing the circuit board, and the fixing structure is provided on the first top wall and the first recess. Between the grooves, or between the second top wall and the second groove.
  • At least one of the first side wall and the second side wall is provided with a guide, and the guide is used to guide the circuit board into the fixing structure.
  • a buckle is provided on the first housing, a locking block is provided on the second housing, and the buckle cooperates with the locking block to connect the first housing and the The second housing is fixed.
  • the embodiment of the present application also provides a battery pack including a battery casing, a plurality of stacked battery cells and a circuit board, the battery cores are electrically connected to the circuit board, and the battery casing is the aforementioned battery casing.
  • the thickness of the battery core is D1, and 14.8 mm ⁇ D1 ⁇ 16.8 mm.
  • the gap between two adjacent cells is D2, 1.6mm ⁇ D2 ⁇ 3.3mm.
  • a plurality of the battery cores form a battery cell assembly, and the thickness of the battery core assembly is D3, 211.6 mm ⁇ D3 ⁇ 249 mm.
  • the gap between the cells is provided with a compressible filler.
  • the thickness of the filler is D4, 2.5mm ⁇ D4 ⁇ 3.7mm .
  • the distance is greater than or equal to D2.
  • the length of the battery pack in the thickness direction of the cell assembly is L, 240mm ⁇ L ⁇ 255mm.
  • the range of the thickness D3 of the cell assembly is 234mm ⁇ D3 ⁇ 249mm.
  • the inner walls of the first groove and the second groove are arc-shaped surfaces with a maximum radius of R1, and the side surfaces of the cell are curved surfaces composed of multiple arcs, and the maximum radius is R1.
  • the radius is R2, R1>R2.
  • glue is provided in the first groove and the second groove, and the thickness of the glue is D5, 0.2mm ⁇ D5 ⁇ 1mm.
  • the projection of the center line of the thickness of the battery core is located at the bottom of the first groove or the second groove.
  • the inner walls of the first groove and the second groove are arc-shaped or elliptical-arc, and the glue is disposed in the first groove and the second groove At the bottom.
  • the thickness of the glue is D5, and 0.25mm ⁇ D5 ⁇ 0.35mm.
  • the mass energy density ratio of the battery pack is Q, 137Wh/kg ⁇ Q ⁇ 148Wh/kg.
  • the electric cores are electrically connected, and the electrically connected electric cores are electrically connected to the circuit board.
  • the battery pack includes a first connecting piece and a second connecting piece, the first connecting piece is welded to the tabs of two adjacent battery cells, and the second connecting piece Welded to the circuit board and welded to the first connector.
  • a connecting groove is formed on the edge of the circuit board, and one end of the first connecting member extends into the connecting groove and is welded to the second connecting member extending into the connecting groove .
  • the first groove and the second groove are provided with adhesive members for fixing one or more of the battery cores to the first side wall and the first side wall. Two side walls.
  • the battery case and the battery pack with the battery case are provided with a first groove on the first side wall of the first case, and a second groove on the second side wall of the second case , And the first groove and the second groove form a space for accommodating the battery, thereby accommodating and positioning the battery in the battery shell, saving glue, improving energy density and reducing cost.
  • Fig. 1 is a schematic structural diagram of a battery pack according to an embodiment of the present application.
  • Fig. 2 is an exploded schematic diagram of the structure of the battery pack shown in Fig. 1.
  • FIG. 3 is a schematic diagram of the structure of the first casing of the battery pack shown in FIG. 1.
  • Fig. 4 is a side view of the first housing shown in Fig. 3.
  • Fig. 5 is a cross-sectional view of the battery pack shown in Fig. 1.
  • Fig. 6 is a schematic diagram of the structure of the rubber sleeve shown in Fig. 1.
  • the first bottom wall 101 is the first bottom wall 101
  • Second side wall 203 Second side wall 203
  • Rubber sleeve 15 Rubber sleeve 15
  • Some embodiments of the present application propose a battery case for accommodating a plurality of stacked battery cells and circuit boards, including a first casing and a second casing.
  • the first shell and the second shell form an accommodating cavity for accommodating a plurality of electric cores and circuit boards.
  • the first housing includes a first bottom wall, a first top wall, a first side wall connecting the first bottom wall and the first top wall, and connecting the first bottom wall, the first top wall, and the first side wall.
  • the first side wall is provided with a first groove for accommodating one or more of the battery cores.
  • the second housing includes a second bottom wall, a second top wall, a second side wall connecting the second bottom wall and the second top wall, and connecting the second bottom wall, the second top wall, and the second side wall.
  • the second side wall is provided with a second groove for accommodating one or more of the battery cores.
  • Some embodiments of the present application also provide a battery pack, including a battery casing, a plurality of electric cores, and a circuit board, the electric cores are electrically connected to the circuit board, and the battery casing is the aforementioned battery casing.
  • An embodiment of the present application provides a battery pack 100.
  • the battery pack 100 includes a battery casing 10, a battery cell assembly 20 and a circuit board 30.
  • the battery cell assembly 20 and the circuit board 30 are respectively disposed in the battery casing 10.
  • the cell assembly 20 is electrically connected to the circuit board 30.
  • the battery cell assembly 20 includes a plurality of battery cells 21.
  • the circuit board 30 is provided with a battery management system.
  • the battery housing 10 includes a first housing 11 and a second housing 12.
  • the first housing 11 and the second housing 12 are connected to form an accommodating cavity 13.
  • the accommodating cavity 13 is used for accommodating the cell assembly 20 and the circuit board 30.
  • the first housing 11 and the second housing 12 are fixedly connected.
  • the first housing 11 includes a first bottom wall 101, a first top wall 102, a first side wall 103, and two first end walls 104.
  • the first side wall 103 connects the first bottom wall 101 and The first top wall 102 and the two first end walls 104 are respectively connected to the first bottom wall 101, the first top wall 102 and the first side wall 103.
  • the second housing 12 includes a second bottom wall 201, a second top wall 202, a second side wall 203, and two second end walls 204.
  • the second side wall 203 connects the second bottom wall 201 and
  • the second top wall 202 and the two second end walls 204 are respectively connected to the second bottom wall 201, the second top wall 202 and the second side wall 203.
  • the first housing 11 and the second housing 12 pass through a first bottom wall 101, a first top wall 102, a first side wall 103, two first end walls 104, a second bottom wall 201, and a second
  • the accommodating cavity 13 formed by the top wall 202, the second side wall 203 and the two second end walls 204 is closed.
  • the first housing 11 further includes a first groove 111.
  • the first groove 111 is provided on the first side wall 103, and the first groove 111 is used for accommodating one side of one or more of the battery cells 21.
  • the second housing 12 includes a second groove 121, the second groove 121 is provided on the second side wall 203, and the second groove 121 is used to receive one or more The battery core 21 is opposite to the other side.
  • the first groove 111 and the second groove 121 on the first housing 11 and the second housing 12 jointly constitute a receiving structure for receiving and fixing the battery cell assembly 20.
  • contours of the first groove 111 and the second groove 121 match the side contours of the one or more cells 21.
  • the first housing 11 and the second housing 12 are also provided with a fixing structure for fixing the circuit board 30.
  • the fixing structure includes a first fixing groove 112 provided on the first side wall 103 and a second fixing groove provided on the second side wall 203.
  • the first fixing groove 112 is provided between the first top wall 102 and the first groove 111.
  • the second fixing groove is provided between the second top wall 202 and the second groove 121.
  • the first fixing groove 112 can pass through two supporting plates extending from the first side wall 103 toward the accommodating cavity 13 and located between the first top wall 102 and the first groove 111 and The first side wall 103 is formed in cooperation with each other.
  • the first housing 11 and the second housing 12 are also provided with a guiding structure for guiding the circuit board 30 into the fixing structure.
  • the guiding structure includes a guiding member 1121 provided on the first side wall 103 and a guiding member provided on the second side wall 203.
  • the guiding member 1121 and the guiding member on the second side wall 203 are wedge-shaped blocks, and the guiding structure may be symmetrically arranged in the first fixing groove 112 and the second fixing groove Medium, but not limited to this.
  • first housing 11 and the second housing 12 are fixedly connected by a connecting object.
  • the connecting object can be glue, tape, and the like.
  • the connecting object is provided on the peripheral wall of the first housing 11 or the second housing 12, and when the first housing 11 and the second housing 12 are connected, they are connected to another The peripheral wall of one shell contacts, and the other shell is fixed, so that the first shell 11 and the second shell 12 are fixed.
  • the peripheral wall of the first housing 11 or the second housing 12 is further provided with a sealing groove 113 or a sealing groove 123.
  • the openings of the sealing groove 113 and the sealing groove 123 face the other housing.
  • the first housing 11 or the second housing 12 is further provided with a through hole 14.
  • the through holes 14 may be provided in the first bottom wall 101, the first top wall 102, the first side wall 103, the first end wall 104, the second bottom wall 201, the second top wall 202, the second side wall 203 and Any one of the second end walls 204 or the junction of two walls.
  • the through hole 14 is used for the external wiring harness to extend into the accommodating cavity 13 of the battery casing 10 to be connected to the circuit board 30.
  • the battery housing 10 further includes a rubber sleeve 15.
  • the rubber sleeve 15 is clamped in the through hole 14.
  • the rubber sleeve 15 is provided with a wire harness hole 151 to facilitate the penetration of external wire harnesses.
  • the through hole 14 is opened on the first end wall 104 and the second end wall 204.
  • the gap between the rubber sleeve 15 and the first end wall 104 and the second end wall 204 is fixed and sealed in the through hole 14 by filling connecting objects.
  • the external wire harness extending into the wire harness hole 151 is fixed and sealed in the wire harness hole 151 by means of gluing and gluing.
  • a buckle 114 is provided on the first housing 11, and a block 124 is provided on the second housing 12.
  • the buckle 114 is arranged opposite to the blocking block 124, and when the first housing 11 is connected to the second housing 12, the first housing 11 and the second housing 12 can be fixed , So that the connecting objects arranged in the sealing groove 113 or the sealing groove 123 have enough time to solidify, and the first shell 11 and the second shell 12 are fixedly connected.
  • the battery housing 10 further includes an explosion-proof structure 16.
  • the explosion-proof structure 16 is used to discharge the gas generated by the battery 21 when the inner battery 21 of the battery pack 100 fails to prevent explosion.
  • the explosion-proof structure 16 is provided on the wall surface of the first housing 11 or the second housing 12.
  • the explosion-proof structure 16 includes an explosion-proof body 161 and a diaphragm provided on the explosion-proof body 161.
  • the explosion-proof body 161 is disposed on the wall surface of the first housing 11 or the second housing 12.
  • the explosion-proof body 161 is provided with an explosion-proof area 1611.
  • the diaphragm is arranged on the explosion-proof area 1611 and is fixedly connected to the explosion-proof body 161.
  • the explosion-proof body 161 may be integrally formed or detachably provided on the first housing 11 or the second housing 12.
  • the membrane is made of waterproof and breathable material.
  • the explosion-proof structure 16 further includes a protective sheet 163 arranged on the outside of the diaphragm.
  • the protective sheet 163 is used to protect the diaphragm provided on the explosion-proof body 161 to prevent it from being damaged by external objects.
  • the battery housing 10 further includes a maintenance structure 17.
  • the repair structure 17 is used to repair the internal components of the battery pack 100 when a fault occurs in the battery pack 100.
  • the maintenance structure 17 is provided on the wall surface of the first housing 11 or the second housing 12.
  • the maintenance structure 17 includes a maintenance window 171 and a baffle 172 provided on the maintenance window 171.
  • the maintenance window 171 is provided on the wall surface of the first housing 11 or the second housing 12.
  • the maintenance window 171 is provided with a maintenance area for the operator to perform maintenance.
  • the blocking piece 172 is sealed on the maintenance area and fixedly connected to the maintenance window 171.
  • the maintenance window 171 may be integrally formed or detachably provided on the first housing 11 or the second housing 12.
  • the baffle 172 is made of polycarbonate.
  • the natural thickness of the cell 21 in the cell assembly 20 is D1, and the thickness range is 14.8mm ⁇ D1 ⁇ 16.8mm. In this way, the energy density of a single cell 21 can be ensured, which can prevent the cell The expansion and deformation of 21 are too large.
  • the gap between two adjacent cells 21 in the battery casing 10 of the battery pack 100 is D2, and the thickness range is 1.6mm ⁇ D2 ⁇ 3.3mm.
  • the gap is filled by the filler 40 to connect the adjacent cells 21 in a fixed manner.
  • the filler 40 is made of a compressible material, and when the cell expands, the filler can be compressed to provide an expansion space for the cell.
  • the thickness of the filler 40 in its natural state is D4, and the thickness range is 2.5mm ⁇ D4 ⁇ 3.7mm.
  • the filler 40 has been compressed inwardly when assembled into the battery pack shell. State, at this time, the battery cell 21 is pressurized in the battery housing 10, which is beneficial to mention the service life of the battery cell 21.
  • the filler 40 may also be uncompressed, that is, the filler 40 is assembled into the battery pack.
  • the battery case 10 of 100 is in a natural state.
  • the filling member 40 is foam.
  • the thickness of the battery cell assembly 20 after being assembled into the battery pack 100 is D3.
  • 13 of the battery cores 21 constitute a battery core assembly, and the thickness range of the battery core assembly is 211.6 mm ⁇ D3 ⁇ 249 mm.
  • the battery cell 21 is a soft-packed battery cell, and the thickness of the battery cell assembly 20 in its natural state may be equal to the assembled thickness D3, or may be greater than the assembled thickness D3, so that the cell assembly Each battery cell 21 of 20 is uniformly pressurized, and is in a slightly pressurized state in the battery pack 100.
  • the distance between the battery cell assembly 20 and the battery housing 10 in the thickness direction is greater than or equal to the gap D2 between two adjacent battery cores 21 to make the expansion and stress uniform.
  • the battery housing 10 of the battery pack 100 has a length L in the thickness direction of the battery cell assembly 20, and the length range is 240mm ⁇ L ⁇ 255mm, and the battery pack 20 has a thickness D3 The range is 234mm ⁇ D3 ⁇ 249mm.
  • the miniaturization of the battery pack 100 is a trend.
  • the length setting is to make the battery pack miniaturized while maintaining a higher capacity density of the battery pack 100.
  • the inner walls of the first groove 111 and the second groove 121 are arc-shaped surfaces with a maximum radius of R1
  • the side surfaces of the cell 21 are curved surfaces composed of multiple arcs, with a maximum radius of R2, Among them, R1>R2, this proportional relationship is mainly for compatibility. Since the cells 21 cannot be completely consistent during manufacture (especially soft-clad cells), the side surface is not a very regular curved surface. The curved surfaces may be different. Only when the design is in the form of R1>R2, can it be ensured that the largest curved surface of each cell 21 can be accommodated in the groove.
  • the first groove 111 and the second groove 121 are provided with adhesive members (not shown).
  • the adhesive member is used to fix one or more of the battery cores 21 to the first side wall 103 and the second side wall 203.
  • the adhesive is very convenient to use, and it helps to fix the battery core 21.
  • the adhesive can be arranged in the groove, of course, it can also be arranged on the side of the battery core 21, or can be arranged at both locations.
  • the adhesive member is glue.
  • the thickness of the glue is D5, and the thickness range is 0.2mm ⁇ D5 ⁇ 1mm. This thickness can be compatible with cells 21 of different thicknesses, so that the grooves can stably accommodate cells 21 with different curved radii on the side surfaces, that is, when the cells 21 are assembled into the battery case 10, each cell 21
  • the curved surface of the side surface of the core 21 and the groove are filled with adhesives to prevent the battery core 21 from not being completely fixed.
  • the projection of the center line of the thickness of the cell 21 is located at the bottom of the first groove 111 or the second groove 121, that is, at the groove closest to the first side wall 103 or the second side wall 203 Location. In this way, it can be ensured that in the thickness direction of the battery core 21, the thickness of the battery core 21 located on both sides of the bottom of the groove is the same, that is, the battery core 21 is centered inside the groove, which facilitates the adhesion of the battery core 21.
  • the inner walls of the first groove 111 and the second groove 121 are circular arcs or elliptical arcs, and the glue is disposed in the first groove 111 and the second groove.
  • the thickness of the glue ranges from 0.25mm ⁇ D5 ⁇ 0.35mm.
  • the wall surfaces of the first fixing groove 112 and the second fixing groove may also be provided with adhesive members, so that the circuit board 30 is guided into the first fixing groove 112 in the guiding structure. After being in the second fixing groove, the circuit board 30 is fixed.
  • the mass energy density ratio of the battery pack 100 is Q, and the range is: 137Wh/kg ⁇ Q ⁇ 148Wh/kg.
  • the battery core 21 and the adjacent battery core 21 are connected in series by connecting the positive and negative electrodes.
  • the positive and negative terminals of the battery 21 are electrically connected to the circuit board 30 through connectors.
  • the battery pack 100 further includes a first connecting member 50 and a second connecting member 60.
  • the cell 21 includes a cell body 211 and two tabs 212. Two tabs 212 are provided on the battery core body 211 and extend from the same side of the battery core body 211. One of the two tabs 212 is a positive tab, and the other is a negative tab.
  • the positive pole tab of the battery cell 21 is connected to the negative pole tab of the adjacent cell 21 (or the negative pole tab of the cell 21 is connected to the positive pole tab of the adjacent cell 21), Then it is connected to one end of the first connecting member 50.
  • the second connecting member 60 is provided on the circuit board 30. The other end of the first connecting member 50 is connected to the second connecting member 60.
  • the first connecting member 50 and the second connecting member 60 are copper sheets.
  • the battery core 21 and the tabs of the adjacent battery core 21 are connected by welding with the first connecting member 50, such as laser welding.
  • the edge of the circuit board 30 is provided with a connecting groove 31, the other end of the first connecting member 50 extends into the connecting groove 31, and the second connecting member 60 is welded to the connecting groove 31. Around the groove 31 and one end also extends into the connecting groove 31. The first connecting member 50 extending into the connecting groove 31 is connected to the second connecting member 60 extending into the connecting groove 31.
  • the first connecting member 50 and the second connecting member 60 extending into the connecting groove 31 are connected by laser welding.
  • a plurality of the battery cores 21 are sequentially bonded together through the filler 40, and then the positive electrode tabs and the negative electrode tabs of the adjacent battery cores 21 are welded and connected by the first connecting member 50, and then the first A connecting piece 50 is welded to the second connecting piece 60, and the battery core 21 and the circuit board 30 are put together into the groove or fixing groove of the first shell 11 or the second shell 12 coated with glue to fix the wire harness Put the rubber sleeve on the through hole 14 and apply glue to fix it. Finally, apply glue in the sealing groove and buckle the other shell on the shell of the battery core 21 and the circuit board 30, and wait for the glue to solidify. The assembly of the battery pack is realized.
  • the battery case 10 and the battery pack 100 with the battery case 10 are provided with a first groove 111 on the first case 11, a second groove 121 on the second case 12, and make the first
  • the groove 111 and the second groove 121 form a receiving space that matches the contour of the battery 21, so that the battery 21 is accommodated and positioned in the battery housing 10.
  • the battery 21 can be glued or the like. It is fixed in the containing space, which saves glue, improves energy density and reduces cost.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

本申请公开了一种电池外壳，用于收容多个堆叠设置的电芯和电路板，包括第一壳体和第二壳体，所述第一壳体与所述第二壳体形成容置腔，用于收容多个电芯和电路板；所述第一壳体包括第一底壁、第一顶壁、连接所述第一底壁和第一顶壁的第一侧壁，连接所述第一底壁、第一顶壁、第一侧壁的两个第一端壁；所述第一侧壁设有用于收容一个或多个所述电芯的第一凹槽；所述第二壳体包括第二底壁、第二顶壁、连接所述第二底壁和第二顶壁的第二侧壁，连接所述第二底壁、第二顶壁、第二侧壁的两个第二端壁；所述第二侧壁设有用于收容一个或多个所述电芯的第二凹槽。本申请还公开了一种带有该电池外壳的电池包。

Description

电池外壳及带有该电池外壳的电池包 技术领域
本申请涉及电池领域，尤其涉及一种电池外壳及带有该电池外壳的电池包。
背景技术
锂离子电池具有能量密度高、循环次数多、储存时间长的特点，故在消费类电子产品、电动车、智能储能设备、电动自行车、大型无人机和电动汽车方面，有着很大发展前景。目前行业内在加工电池的过程中，要对电池包进行灌胶作业，实现整个模组的固定。灌胶作业所需的胶量较大，经过灌胶后，电池的能量密度降低，散热较差，并且灌胶所需成本较高。
发明内容
有鉴于此，有必要提供一种电池外壳及带有该电池外壳的电池包。
本申请的实施例提供了一种电池外壳，用于收容多个堆叠设置的电芯和电路板，包括第一壳体和第二壳体。所述第一壳体与所述第二壳体形成容置腔，用于收容多个电芯和电路板。所述第一壳体包括第一底壁、第一顶壁、连接所述第一底壁和第一顶壁的第一侧壁，连接所述第一底壁、第一顶壁、第一侧壁的两个第一端壁。所述第一侧壁设有用于收容一个或多个所述电芯的第一凹槽。所述第二壳体包括第二底壁、第二顶壁、连接所述第二底壁和第二顶壁的第二侧壁，连接所述第二底壁、第二顶壁、第二侧壁的两个第二端壁。所述第二侧壁设有用于收容一个或多个所述电芯的第二凹槽。
根据本申请的一些实施例，所述第一凹槽用于收容一个或多个所述电芯的一侧，所述第二凹槽用于收容一个或多个所述电芯的相对的另一侧。
根据本申请的一些实施例，所述第一凹槽和所述第二凹槽的轮廓与所述一个或多个所述电芯的侧面轮廓相匹配。
根据本申请的一些实施例，所述第一壳体及所述第二壳体中的至少一个周壁相对另一壳体的一侧设有密封槽，所述密封槽用于容纳连接物以将所述第一壳体与所述第二壳体固定。
根据本申请的一些实施例，所述第一壳体及所述第二壳体中的至少一个壁面上还设有通孔，所述通孔用于外界线束伸入所述容置腔。
根据本申请的一些实施例，所述第一侧壁及所述第二侧壁中的至少一个设置有固定所述电路板的固定结构，所述固定结构设于第一顶壁和第一凹槽之间，或设于所述第二顶壁和第二凹槽之间。
根据本申请的一些实施例，所述第一侧壁及所述第二侧壁中的至少一个设有导向件，所述导向件用于引导所述电路板进入所述固定结构。
根据本申请的一些实施例，所述第一壳体上设置有卡扣，所述第二壳体上设置有卡块，所述卡扣与所述卡块配合将所述第一壳体与所述第二壳体固定。
本申请的实施例还提供了一种电池包，包括电池外壳、多个堆叠设置的电芯及电路板，所述电芯与所述电路板电连接，所述电池外壳为上述的电池外壳。
根据本申请的一些实施例，沿所述电芯的堆叠方向，所述电芯的厚度为D1，14.8mm≤D1≤16.8mm。
根据本申请的一些实施例，沿所述电芯的堆叠方向，两个相邻的所述电芯之间的间隙为D2，1.6mm≤D2≤3.3mm。
根据本申请的一些实施例，沿所述电芯的堆叠方向，多个所述电芯组成电芯组件，所述电芯组件的厚度为D3，211.6mm≤D3≤249mm。
根据本申请的一些实施例，所述电芯之间的间隙设置有可被压缩的填充件，沿所述电芯的堆叠方向，所述填充件的厚度为D4，2.5mm≤D4≤3.7mm。
根据本申请的一些实施例，沿所述电芯的堆叠方向，所述电芯组件在厚度方向上与所述电池外壳之间存在间距，所述间距大于或等于D2。
根据本申请的一些实施例，所述电池包在所述电芯组件厚度方向的长度为L，240mm≤L≤255mm。
根据本申请的一些实施例，所述电芯组件厚度D3的范围，234mm≤D3≤249mm。
根据本申请的一些实施例，所述第一凹槽和所述第二凹槽的内壁为弧形面，其最大半径为R1，所述电芯侧面为多个弧形组成的曲面，其最大半径为R2，R1＞R2。
根据本申请的一些实施例，所述第一凹槽和所述第二凹槽内设有胶水，所述胶水的厚度为D5，0.2mm≤D5≤1mm。
根据本申请的一些实施例，所述电芯厚度的中心线的投影位于所述第一凹槽或所述第二凹槽的底部。
根据本申请的一些实施例，所述第一凹槽和所述第二凹槽的内壁为圆弧形或椭圆弧形，所述胶水设置于所述第一凹槽和所述第二凹槽的的底部。
根据本申请的一些实施例，所述胶水的厚度为D5，0.25mm≤D5≤0.35mm。
根据本申请的一些实施例，所述电池包的质量能量密度比为Q，137Wh/kg≤Q≤148Wh/kg。
根据本申请的一些实施例，所述电芯之间电连接，电连接的所述电芯与所述电路板电性连接。
根据本申请的一些实施例，所述电池包包括第一连接件及第二连接件，所述第一连接件与相邻两个所述电芯的极耳焊接连接，所述第二连接件焊接于所述电路板，与所述第一连接件焊接连接。
根据本申请的一些实施例，所述电路板的边缘开设连接槽，所述第一连接件的一端伸入所述连接槽中与伸入所述连接槽中的所述第二连接件焊接连接。
根据本申请的一些实施例，所述第一凹槽和所述第二凹槽内设有粘接件，用于固定一个或多个所述电芯与所述第一侧壁和所述第二侧壁。
上述电池外壳及带有该电池外壳的电池包通过在第一壳体的所述第一侧壁上设第一凹槽，在第二壳体的所述第二侧壁上设第二凹槽，并使所述第一凹槽与所述第二凹槽之间构成收容所述电芯的空间，从而将电芯收容定位于电池外壳中，节省了灌胶，提高了能量密度且降低了成本。
附图说明
图1为根据本申请一实施例的电池包的结构示意图。
图2为图1所示的电池包的结构分解示意图。
图3为图1所示的电池包的第一壳体的结构示意图。
图4为图3所示的第一壳体的侧视图。
图5为图1所示的电池包的剖视图。
图6为图1所示的胶套的结构示意图。
主要元件符号说明：
电池包          100
电池外壳                     10
第一壳体                     11
第一底壁                     101
第一顶壁                     102
第一侧壁                     103
第一端壁                     104
第一凹槽                     111
第一固定槽                   112
密封槽                       113、123
卡扣                         114
第二壳体                     12
第二底壁                     201
第二顶壁                     202
第二侧壁                     203
第二端壁                     204
第二凹槽                     121
卡块                         124
容置腔                       13
通孔                         14
胶套                         15
线束孔                       151
防爆结构                     16
防爆本体                     161
防爆区域                     1611
保护片                       163
维修结构                     17
维修窗                       171
挡片                         172
电芯组件                     20
电芯                         21
电芯本体                     211
极耳                         212
电路板                       30
连接槽                       31
填充件                       40
第一连接件                   50
第二连接件                   60
具体实施方式：
下面将结合本申请实施方式中的附图，对本申请实施方式进行描述，显然，所描述的实施方式仅仅是本申请一部分实施方式，而不是全部的实施方式。
需要说明的是，当元件被称为“固定于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。当一个元件被认为是“设置于”另一个元件，它可以是直接设置在另一个元件上或者可能同时存在居中元件。本文所使用的术语“垂直的”、“水平的”、“左”、“右”以及类似的表述只是为了说明的目的。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施方式的目的，不是旨在于限制本申请。本文所使用的术语“或/及”包括一个或多个相关的所列项目的任意的和所有的组合。
本申请一些实施方式提出一种电池外壳，用于收容多个堆叠设置的电芯和电路板，包括第一壳体和第二壳体。所述第一壳体与所述第二壳体形成容置腔，用于收容多个电芯和电路板。所述第一壳体包括第一底壁、第一顶壁、连接所述第一底壁和第一顶壁的第一侧壁，连接所述第一底壁、第一顶壁、第一侧壁的两个第一端壁。所述第一侧壁设有用于收容一个或多个所述电芯的第一凹槽。所述第二壳体包括第二底壁、第二顶壁、连接所述第二底壁和第二顶壁的第二侧壁，连接所述第二底壁、第二顶壁、第二侧壁的两个第二端壁。所述第二侧壁设有用于收容一个或多个所述电芯的第二凹槽。
本申请的一些实施例还提供了一种电池包，包括电池外壳、多个电芯及电路板，所述电芯与所述电路板电连接，所述电池外壳为上述的电池外壳。
下面结合附图，对本申请的一些实施方式作详细说明。在不冲突的情况下，下述的实施例及实施例中的特征可以相互组合。
请同时参阅图1至图3，本申请的一实施例提出一种电池包100。所述电池包100包括电池外壳10、电芯组件20及电路板30。所述电芯组件20与所述电路板30分别设于所述电池外壳10中。所述电芯组件20与所述电路板30电连接。所述电芯组件20包括多个电芯21。所述电路板30上设置有电池管理系统。
具体地，所述电池外壳10包括第一壳体11和第二壳体12。所述第一壳体11与所述第二壳体12连接形成容置腔13。所述容置腔13用于收容所述电芯组件20及电路板30。
在一些实施例中，所述第一壳体11与所述第二壳体12固定连接。
所述第一壳体11包括第一底壁101、第一顶壁102、第一侧壁103及两个第一端壁104，所述第一侧壁103连接所述第一底壁101和所述第一顶壁102，两个所述第一端壁104分别连接所述第一底 壁101、所述第一顶壁102和所述第一侧壁103。
所述第二壳体12包括第二底壁201、第二顶壁202、第二侧壁203及两个第二端壁204，所述第二侧壁203连接所述第二底壁201和所述第二顶壁202，两个所述第二端壁204分别连接所述第二底壁201、所述第二顶壁202和所述第二侧壁203。
所述第一壳体11与所述第二壳体12通过第一底壁101、第一顶壁102、第一侧壁103、两个第一端壁104、第二底壁201、第二顶壁202、第二侧壁203及两个第二端壁204形成的容置腔13为封闭的。
请同时参阅图4及图5，所述第一壳体11还包括第一凹槽111。所述第一凹槽111设于所述第一侧壁103上，所述第一凹槽111用于收容一个或多个所述电芯21的一侧。
同样的，所述第二壳体12上包括第二凹槽121，所述第二凹槽121设于所述第二侧壁203上，所述第二凹槽121用于收容一个或多个所述电芯21相对的另一侧。所述第一壳体11及所述第二壳体12上的所述第一凹槽111及第二凹槽121共同构成用于容纳固定所述电芯组件20的容纳结构。
进一步，所述第一凹槽111和所述第二凹槽121的轮廓与所述一个或多个所述电芯21的侧面轮廓相匹配。
所述第一壳体11和所述第二壳体12上还设有用于固定所述电路板30的固定结构。所述固定结构包括设于所述第一侧壁103上的第一固定槽112及设于所述第二侧壁203上的第二固定槽。
所述第一固定槽112设于第一顶壁102和第一凹槽111之间。所述第二固定槽设于第二顶壁202和第二凹槽121之间。
具体地，所述第一固定槽112可通过自所述第一侧壁103朝向所述容置腔13延伸的、位于第一顶壁102和第一凹槽111之间的两个支撑板与所述第一侧壁103配合而共同形成。
进一步，所述第一壳体11和所述第二壳体12上还设有引导所述电路板30进入所述固定结构的导向结构。所述导向结构包括设于所述第一侧壁103上的导向件1121及设于所述第二侧壁203上的导向件。
在一些实施例中，所述导向件1121及所述第二侧壁203上的导向件为楔形块，所述导向结构可对称地设于所述第一固定槽112与所述第二固定槽中，但不限于此。
在一些实施例中，所述第一壳体11与所述第二壳体12通过连接物固定连接。所述连接物可为胶水、胶带等。
具体地，所述连接物设于所述第一壳体11或所述第二壳体12的周壁上，并在所述第一壳体11与所述第二壳体12连接时，与另一壳体的周壁接触，将另一壳体固定，从而实现第一壳体11与所述第二壳体12的固定。
在一些实施例中，所述第一壳体11或所述第二壳体12的周壁上还设有密封槽113或密封槽123。所述密封槽113及所述密封槽123的开口朝向另一壳体。通过将连接物填充或涂抹于所述密封槽113或密封槽123中，然后将所述第一壳体11与所述第二壳体12连接，可实现第一壳体11与第二壳体12的固定。
在一些实施例中，所述第一壳体11或所述第二壳体12上还设有通孔14。所述通孔14可以设于第一底壁101、第一顶壁102、第一侧壁103、第一端壁104、第二底壁201、第二顶壁202、第二侧壁203及第二端壁204中任意一壁面上或两个壁面的连接处。所述通孔14用于外界线束伸入电池外壳10的容置腔13中，以与所述电路板30连接。
请同时参阅图6，在一些实施例中，所述电池外壳10还包括胶套15。所述胶套15卡设于所述通孔14中。所述胶套15设有线束孔151以便于外界线束伸入。所述通孔14开设于所述第一端壁104 和所述第二端壁204上。
通过填充连接物于所述胶套15与所述第一端壁104和所述第二端壁204的间隙中将所述胶套15固定且密封于所述通孔14中。所述线束孔151中通过涂胶、胶粘的方式将伸入所述线束孔151中的外界线束固定并密封在所述线束孔151中。
在一些实施例中，所述第一壳体11上设置有卡扣114，所述第二壳体12上设置有卡块124。所述卡扣114与所述卡块124相对设置，在所述第一壳体11连接所述第二壳体12时，可将所述第一壳体11与所述第二壳体12固定，使设置于密封槽113或密封槽123中的连接物有足够的时间固化，将第一壳体11与第二壳体12固定连接。
在一些实施例中，所述电池外壳10还包括防爆结构16。所述防爆结构16用于电池包100内部电芯21失效时，将电芯21产生的气体排出，防止爆炸。
具体地，所述防爆结构16设于所述第一壳体11或所述第二壳体12的壁面上。所述防爆结构16包括防爆本体161及设于所述防爆本体161上的膜片。所述防爆本体161设于所述第一壳体11或所述第二壳体12的壁面上。所述防爆本体161上设有防爆区域1611。所述膜片设于所述防爆区域1611上且固定连接所述防爆本体161。
在一些实施例中，所述防爆本体161可一体成型或可拆卸地设于所述第一壳体11或所述第二壳体12上。
优选的，所述膜片为防水透气材料制得。
在一些实施例中，所述防爆结构16包括还包括设置于膜片外侧的保护片163。所述保护片163用于对设于防爆本体161上的膜片进行保护，防止其被外界物体损坏。
在一些实施例中，所述电池外壳10还包括维修结构17。所述维修结构17用于在电池包100内部出现故障时，对电池包100内部 的元件进行维修。
具体地，所述维修结构17设于所述第一壳体11或所述第二壳体12的壁面上。所述维修结构17包括维修窗171及设于所述维修窗171上的挡片172。所述维修窗171设于所述第一壳体11或所述第二壳体12的壁面上。所述维修窗171上设有维修区域以供操作员进行维修。所述挡片172密封设于所述维修区域上且固定连接所述维修窗171。
在一些实施例中，所述维修窗171可一体成型或可拆卸地设于所述第一壳体11或所述第二壳体12上。
优选的，所述挡片172为聚碳酸酯制得的。
优选的，所述电芯组件20中电芯21的自然状态的厚度为D1，其厚度范围为14.8mm≤D1≤16.8mm，如此即可保证单个电芯21的能量密度，有可防止电芯21的膨胀量及变形量过大。
设于电池包100的电池外壳10内两个相邻的所述电芯21之间的间隙为D2，其厚度范围为1.6mm≤D2≤3.3mm。通过填充件40填充所述间隙将相邻的所述电芯21固定连接。所述填充件40为可被压缩材质制成，电芯膨胀时，填充件可被压缩，为电芯提供膨胀空间。所述填充件40的自然状态的厚度为D4，其厚度范围为2.5mm≤D4≤3.7mm，在一些实施例中，填充件40在组装到电池包外壳内时已被向内压缩，呈压缩状态，此时，电芯21在电池外壳10内被加压，有利于提到电芯21的使用寿命，在其他实施中，填充件40也可未被压缩，即填充件40组装到电池包100的电池外壳10内时呈自然状态。
在一些实施例中，所述填充件40为泡棉。
所述电芯组件20在组装到电池包100中后的厚度为D3。在一些实施例中，13个所述电芯21构成电芯组件，其厚度范围为211.6mm≤D3≤249mm。在一些实施例中，所述电芯21为软包电芯， 其组成的电芯组件20在自然状态的厚度可以等于组装后的厚度D3，亦可以大于组装后的厚度D3，使电芯组件20的每个电芯21被均匀加压，在电池包100中呈略微加压的状态。
所述电芯组件20在厚度方向上与所述电池外壳10之间存在间距，所述间距大于或等于两个相邻的所述电芯21之间的间隙D2，以使膨胀受力均匀。
具体地，在一些实施例中，所述电池包100的电池外壳10在所述电芯组件20厚度方向的长度为L，其长度范围为240mm≤L≤255mm，所述电芯组件20厚度D3的范围在234mm≤D3≤249mm。电池包100的小型化是一种趋势，这种长度的设置是为了使电池包小型化，同时还可保持电池包100有较高的能力密度。
所述第一凹槽111和所述第二凹槽121的内壁为弧形面，其最大半径为R1，所述电芯21的侧面为多个弧形组成的曲面，其最大半径为R2，其中R1＞R2，这样的比例关系主要是为了兼容，由于电芯21在制造时不可能保持完全一致(尤其是软包电芯)，其侧面不是一个非常规则的曲面，每个电芯21的曲面都可能不一样，只有设计成R1＞R2的形式，才可以保证每个电芯21的最大的曲面均可以被凹槽收容。
所述第一凹槽111和所述第二凹槽121内设有粘接件(图未示)。所述粘接件用于将一个或多个所述电芯21与所述第一侧壁103和所述第二侧壁203固定。粘接件的使用十分方便，其有助于电芯21的固定，可在凹槽中设置粘接件，当然也可在电芯21的侧面设置，也可两处均设置。
在一些实施例中，所述粘接件为胶水。所述胶水的厚度为D5，其厚度范围为0.2mm≤D5≤1mm。这个厚度可以兼容不同厚度的电芯21，使得凹槽可以将侧面的曲面半径不同的电芯21均稳定的收容，即在所述电芯21组装到电池外壳10中时，每个所述电芯21 侧面的曲面与凹槽之间均填充满粘接件，防止电芯21未完全固定。
所述电芯21厚度的中心线的投影位于所述第一凹槽111或所述第二凹槽121的底部，即位于所述凹槽最靠近第一侧壁103或第二侧壁203的位置。如此可保证电芯21在厚度方向上，位于凹槽底部两侧的电芯21的厚度是一样多，也就是电芯21在凹槽内部居中，可便于电芯21进行粘接。
在一些实施例中，所述第一凹槽111和所述第二凹槽121的内壁为圆弧形或椭圆弧形，所述胶水设置于所述第一凹槽111和所述第二凹槽121的的底部。所述胶水的厚度范围为0.25mm≤D5≤0.35mm。
在一些实施例中，所述第一固定槽112与所述第二固定槽的壁面上同样可设有粘接件，从而在导向结构将所述电路板30导向进入所述第一固定槽112与所述第二固定槽中后，将所述电路板30固定。
在一些实施例中，为了充分利用空间，降低重量，并提供较高的能量密度，所述电池包100的质量能量密度比为Q，其范围在：137Wh/kg≤Q≤148Wh/kg。
所述电芯21与其相邻的另一电芯21通过正负极连接的方式串联在一起。且所述电芯21正负极连接处通过连接件与电路板30电性连接。
具体地，所述电池包100还包括第一连接件50及第二连接件60。所述电芯21包括电芯本体211和两个极耳212。两个极耳212设于所述电芯本体211上，且从所述电芯本体211的同一侧伸出。所述两个极耳212其中一个为正极极耳，另一个为负极极耳。所述电芯21的正极极耳与相邻的所述电芯21的负极极耳连接(或所述电芯21的负极极耳与相邻的所述电芯21的正极极耳连接)，然后与所述第一连接件50的一端连接。所述电路板30上设置所述第二连接件60。所述第一连接件50的另一端与所述第二连接件60连接。
在一些实施例中，所述第一连接件50与所述第二连接件60为铜片。
优选的，所述电芯21与相邻的所述电芯21的极耳通过与第一连接件50进行焊接的方式连接，如激光焊接。
在一些实施例中，所述电路板30的边缘开设连接槽31，所述第一连接件50的另一端伸入所述连接槽31中，所述第二连接件60焊接设于所述连接槽31周围且一端同样伸入所述连接槽31中。伸入所述连接槽31中的第一连接件50与伸入所述连接槽31中的所述第二连接件60连接。
优选的，伸入所述连接槽31中的所述第一连接件50与所述第二连接件60通过激光焊接连接。
组装时，将多个所述电芯21通过填充件40依次粘接在一起，然后，将相邻的电芯21的正极极耳与负极极耳通过第一连接件50焊接连接，随后将第一连接件50与第二连接件60焊接，将电芯21及电路板30一起放入涂好胶水的第一壳体11或第二壳体12的凹槽或固定槽中，将固定有线束的胶套套于通孔14上，涂胶固定，最后，在密封槽中涂胶并将另一壳体扣合于装入电芯21及电路板30的壳体上，待涂胶固化，即实现了电池包的组装。
上述电池外壳10及带有该电池外壳10的电池包100通过在第一壳体11上设第一凹槽111，在第二壳体12上设第二凹槽121，并使所述第一凹槽111与所述第二凹槽121之间构成与所述电芯21轮廓相匹配的收容空间，从而将电芯21收容定位于电池外壳10中，可通过胶粘等方式将电芯21固定于收容空间中，节省了灌胶，提高了能量密度且降低了成本。
以上实施例仅用以说明本申请的技术方案而非限制，尽管参照较佳实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解，可以对本申请的技术方案进行修改或等同替换，而不脱离 本申请技术方案的精神和实质。

Claims (26)

  1. 一种电池外壳，用于收容多个堆叠设置的电芯和电路板，包括第一壳体和第二壳体，其特征在于：
    所述第一壳体与所述第二壳体形成容置腔，用于收容多个电芯和电路板；
    所述第一壳体包括第一底壁、第一顶壁、连接所述第一底壁和第一顶壁的第一侧壁，连接所述第一底壁、第一顶壁、第一侧壁的两个第一端壁；
    所述第一侧壁设有用于收容一个或多个所述电芯的第一凹槽；
    所述第二壳体包括第二底壁、第二顶壁、连接所述第二底壁和第二顶壁的第二侧壁，连接所述第二底壁、第二顶壁、第二侧壁的两个第二端壁；
    所述第二侧壁设有用于收容一个或多个所述电芯的第二凹槽。
  2. 如权利要求1所述的电池外壳，其特征在于：所述第一凹槽用于收容一个或多个所述电芯的一侧，所述第二凹槽用于收容一个或多个所述电芯的相对的另一侧。
  3. 如权利要求2所述的电池外壳，其特征在于：所述第一凹槽和所述第二凹槽的轮廓与所述一个或多个所述电芯的侧面轮廓相匹配。
  4. 如权利要求1所述的电池外壳，其特征在于：所述第一壳体及所述第二壳体中的至少一个周壁相对另一壳体的一侧设有密封槽，所述密封槽用于容纳连接物以将所述第一壳体与所述第二壳体固定。
  5. 如权利要求1所述的电池外壳，其特征在于：所述第一壳体及所述第二壳体中的至少一个壁面上还设有通孔，所述通孔用于外界线束伸入所述容置腔。
  6. 如权利要求2所述的电池外壳，其特征在于：所述第一侧壁 及所述第二侧壁中的至少一个设置有固定所述电路板的固定结构，所述固定结构设于第一顶壁和第一凹槽之间，或设于所述第二顶壁和第二凹槽之间。
  7. 如权利要求6所述的电池外壳，其特征在于：所述第一侧壁及所述第二侧壁中的至少一个设有导向件，所述导向件用于引导所述电路板进入所述固定结构。
  8. 如权利要求1所述的电池外壳，其特征在于：所述第一壳体上设置有卡扣，所述第二壳体上设置有卡块，所述卡扣与所述卡块配合将所述第一壳体与所述第二壳体固定。
  9. 一种电池包，包括电池外壳、多个堆叠设置的电芯及电路板，所述电芯与所述电路板电连接，其特征在于：所述电池外壳为如权利要求1-8中任意一项所述的电池外壳。
  10. 如权利要求9所述的电池包，其特征在于：沿所述电芯的堆叠方向，所述电芯的厚度为D1，14.8mm≤D1≤16.8mm。
  11. 如权利要求10所述的电池包，其特征在于：沿所述电芯的堆叠方向，两个相邻的所述电芯之间的间隙为D2，1.6mm≤D2≤3.3mm。
  12. 如权利要求11所述的电池包，其特征在于：沿所述电芯的堆叠方向，多个所述电芯组成电芯组件，所述电芯组件的厚度为D3，211.6mm≤D3≤249mm。
  13. 如权利要求11所述的电池包，其特征在于：所述电芯之间的间隙设置有可被压缩的填充件，沿所述电芯的堆叠方向，所述填充件的厚度为D4，2.5mm≤D4≤3.7mm。
  14. 如权利要求13所述的电池包，其特征在于：沿所述电芯的堆叠方向，所述电芯组件在厚度方向上与所述电池外壳之间存在间距，所述间距大于或等于D2。
  15. 如权利要求12所述的电池包，其特征在于：所述电池包在 所述电芯组件厚度方向的长度为L，240mm≤L≤255mm。
  16. 如权利要求12所述的电池包，其特征在于：所述电芯组件厚度D3的范围，234mm≤D3≤249mm。
  17. 如权利要求10-16任意一项所述的电池包，其特征在于：所述第一凹槽和所述第二凹槽的内壁为弧形面，其最大半径为R1，所述电芯侧面为多个弧形组成的曲面，其最大半径为R2，R1＞R2。
  18. 如权利要求17所述的电池包，其特征在于：所述第一凹槽和所述第二凹槽内设有胶水，所述胶水的厚度为D5，0.2mm≤D5≤1mm。
  19. 如权利要求18所述的电池包，其特征在于：所述电芯厚度的中心线的投影位于所述第一凹槽或所述第二凹槽的底部。
  20. 如权利要求19所述的电池包，其特征在于：所述第一凹槽和所述第二凹槽的内壁为圆弧形或椭圆弧形，所述胶水设置于所述第一凹槽和所述第二凹槽的的底部。
  21. 如权利要求20所述的电池包，其特征在于：所述胶水的厚度为D5，0.25mm≤D5≤0.35mm。
  22. 如权利要求9所述的电池包，其特征在于：所述电池包的质量能量密度比为Q，137Wh/kg≤Q≤148Wh/kg。
  23. 如权利要求9所述的电池包，其特征在于：所述电芯之间电连接，电连接的所述电芯与所述电路板电性连接。
  24. 如权利要求23所述的电池包，其特征在于：所述电池包包括第一连接件及第二连接件，所述第一连接件与相邻两个所述电芯的极耳焊接连接，所述第二连接件焊接于所述电路板，与所述第一连接件焊接连接。
  25. 如权利要求24所述的电池包，其特征在于：所述电路板的边缘开设连接槽，所述第一连接件的一端伸入所述连接槽中与伸入所述连接槽中的所述第二连接件焊接连接。
  26. 如权利要求9所述的电池包，其特征在于：所述第一凹槽和所述第二凹槽内设有粘接件，用于固定一个或多个所述电芯与所述第一侧壁和所述第二侧壁。
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