WO2022160267A1 - 电池组、用电装置及电池组的组装方法 - Google Patents

电池组、用电装置及电池组的组装方法 Download PDF

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Publication number
WO2022160267A1
WO2022160267A1 PCT/CN2021/074454 CN2021074454W WO2022160267A1 WO 2022160267 A1 WO2022160267 A1 WO 2022160267A1 CN 2021074454 W CN2021074454 W CN 2021074454W WO 2022160267 A1 WO2022160267 A1 WO 2022160267A1
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WO
WIPO (PCT)
Prior art keywords
resin layer
groove
battery pack
casing
edge portion
Prior art date
Application number
PCT/CN2021/074454
Other languages
English (en)
French (fr)
Inventor
兰天保
胡传鹏
李长江
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/CN2021/074454 priority Critical patent/WO2022160267A1/zh
Priority to CN202180092377.2A priority patent/CN116762214A/zh
Priority to EP21921872.4A priority patent/EP4287369A1/en
Publication of WO2022160267A1 publication Critical patent/WO2022160267A1/zh
Priority to US18/361,060 priority patent/US20230369693A1/en

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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
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/19—Sealing members characterised by the material
    • H01M50/198—Sealing members characterised by the material characterised by physical properties, e.g. adhesiveness or hardness
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of battery technology, and in particular, to a battery pack, an electrical device and a method for assembling the battery pack.
  • the battery usually includes two casings and a battery module arranged on the casing.
  • the two casings are fixed by fasteners such as screws.
  • An embodiment of the present application provides a battery pack, including a battery module, a first casing and a second casing, wherein the first casing and the second casing are formed with a receiving space for receiving the battery module , the first shell includes a first edge portion, the first edge portion is provided with a first groove, the first groove is provided with a first resin layer, the first resin layer and the first An inner wall of the groove is bonded and fixed, the second shell includes a second edge portion, the first resin layer is disposed between the first shell and the second shell, and is connected with the second shell. The edge parts are connected, and the first resin layer in the first groove is in a compressed state, and the compression amount is 20% to 30% of the length of the first resin layer in a natural state.
  • the first resin layer is in contact and connected with the second edge portion.
  • the first edge portion is provided with a second groove communicating with the first groove, the first resin layer is provided in the second groove, and the first resin layer is provided in the second groove.
  • the layer is connected to the inner wall of the second groove.
  • the first resin layer is connected in contact with the inner wall of the second groove.
  • the first groove is closer to the battery module than the second groove.
  • the first edge portion is provided with a first convex portion
  • the second groove is closer to the battery module than the first convex portion
  • the first edge portion and the A first concave portion communicated with the second groove is provided between the second edge portions
  • the first convex portion is located at the first concave portion
  • the first resin layer can be removed from the first concave portion. extending toward the first convex portion, so as to be able to accommodate more of the deformed first resin layer.
  • the first resin layer is formed by placing resin in the first groove and then fixing it.
  • the second edge portion includes a second surface connected to the first edge portion, the second surface is a plane structure, and the flatness is A, and the A is less than or equal to 0.3 mm.
  • the battery module includes a plurality of stacked battery cells, the direction of the stacking of the plurality of battery cells is the second direction, and along the first direction, the thickness of the second edge portion is T. , the first edge portion and the second edge portion are matched and connected along the second direction, and along the second direction, the height of the second groove is H 1 , and the range of H 1 is 0.2T to 0.25T , the second direction is perpendicular to the first direction.
  • the width of the second groove is W 1 , and the range of W 1 is 0.2T to 0.25T.
  • the thickness T of the second edge portion ranges from 2.5 mm to 3 mm.
  • the first casing is provided with a first hole
  • the first resin layer includes a first part and a second part, the first part is connected to the second part, and along the third Viewed from the direction, the first portion is closer to the battery module than the first hole, and the third direction is perpendicular to both the first direction and the second direction.
  • the Shore hardness C of the first resin layer is 20° to 35°.
  • the first casing includes a first section connected to the first edge, the first section is provided in the second casing, and the first section and A second concave portion is provided between the second casings, and the first groove communicates with the second concave portion, so as to better accommodate the first resin layer.
  • the first resin layer is provided in the second concave portion.
  • the battery pack further includes a guard, and the guard is arranged between the battery module and the second casing to protect the battery module.
  • the compression amount is 20% to 21.4% of the length of the first resin layer in a natural state.
  • the compression amount is 21.4% to 25% of the length of the first resin layer in a natural state.
  • the compression amount is 25% to 27% of the length of the first resin layer in a natural state.
  • the compression amount is 27% to 30% of the length of the first resin layer in a natural state, which can prevent other impurities from entering the battery pack.
  • the present application also provides an electrical device comprising a body and a battery pack accommodated in the body, wherein the battery pack is any one of the above-mentioned battery packs.
  • the present application further provides a method for assembling a battery pack, comprising the following steps:
  • the first resin layer is pressed through the first case and the second case, and the compression amount of the first resin layer is 20% to 30% of its length in a natural state.
  • the battery pack, the electrical equipment and the method for assembling the battery pack provided by the present application are provided by the first resin layer in the first groove, and the first case and the second case are jointly When compressing the first resin layer, the compression amount of the first resin layer is 20% to 30% of its length in a natural state, the first resin layer can more effectively inhibit other impurities from entering the battery pack, Take water, for example, to reduce the impact of other impurities on the battery pack.
  • FIG. 1 is a three-dimensional schematic diagram of a battery pack according to an embodiment of the present application.
  • FIG. 2 is a schematic cross-sectional view of the battery pack shown in FIG. 1 along the direction II-II.
  • FIG. 3 is a schematic cross-sectional view of the battery pack shown in FIG. 2 provided with a first resin layer.
  • FIG. 4 is a schematic cross-sectional view of a battery pack provided with a first resin layer in another embodiment.
  • FIG. 5 is a schematic perspective view of the first casing of the battery pack shown in FIG. 1 .
  • FIG. 6 is a schematic top view of the first casing of the battery pack shown in FIG. 5 .
  • FIG. 7 is a schematic cross-sectional view of the first casing of the battery pack shown in FIG. 6 along the direction VII-VII.
  • FIG. 8 is a schematic cross-sectional view of a battery pack provided with a third casing according to an embodiment of the present application.
  • FIG. 9 is a schematic cross-sectional view of the battery pack shown in FIG. 8 provided with a second resin layer.
  • FIG. 10 is a schematic top view of the third casing of the battery pack shown in FIG. 6 .
  • FIG. 11 is a schematic cross-sectional view of the first casing and the third casing of the battery pack provided with convex portions in another embodiment of the present application.
  • FIG. 12 is a schematic cross-sectional view of the first resin layer and the second resin layer extending toward the convex portion in the battery pack shown in FIG. 11 .
  • FIG. 13 is an exploded schematic view of the battery pack shown in FIG. 1 .
  • FIG. 14 is an exploded schematic view of the cell.
  • FIG. 15 is a flowchart of a method for assembling a battery pack in yet another embodiment of the present application.
  • the third shell 30 is the third shell 30
  • the third convex part 314 is the third convex part 314
  • the first resin layer 40 is the first resin layer 40
  • the second resin layer 50 is the second resin layer 50
  • spatially relative terms such as “on” and the like, may be used herein for convenience of description to describe the relationship of one element or feature to another element(s) or feature(s) as illustrated in the figures. It will be understood that, in addition to the orientation depicted in the figures, spatially relative terms are intended to encompass different orientations of the device or apparatus in use or operation. For example, if the device in the figures is turned over, elements described as “above” or “over” other elements or features would then be oriented “below” or “beneath” the other elements or features. Thus, the exemplary term “upper” can include both an orientation of above and below. It will be understood that, although the terms first, second, third, etc.
  • An embodiment of the present application provides a battery pack, including a battery module, a first casing and a second casing, wherein the first casing and the second casing are formed with an accommodation space for accommodating the battery module , the first shell includes a first edge portion, the first edge portion is provided with a first groove, the first groove is provided with a first resin layer, the first resin layer and the first An inner wall of the groove is bonded and fixed, the second shell includes a second edge portion, the first resin layer is disposed between the first shell and the second shell, and is connected with the second shell. The edge parts are connected, and the first resin layer in the first groove is in a compressed state, and the compression amount is 20% to 30% of the length of the first resin layer in a natural state.
  • the first resin layer is disposed between the first case and the second case, the first resin layer is in a compressed state in the first groove, and the The compression amount of the first resin layer is 20% to 30% of the length of the first resin layer in a natural state. Effectively inhibit other impurities from entering the battery pack and reduce the impact of other impurities on the battery pack.
  • a battery pack 100 including a first casing 10 , a second casing 20 , a first resin layer 40 and a battery module 60 , the first casing 10 passing through Fasteners, such as screws, are fixed on the second housing 20 .
  • the second housing 20 has four interconnected side walls 22, the four side walls 22 are enclosed to form a middle frame structure with openings 221 at both ends, the four side walls 22 form a receiving space 222, the first A casing 10 is used to close the opening 221 .
  • the four side walls 22 can be formed into an integral structure, such as an aluminum extrusion process. It can be understood that, in other embodiments, the four side walls 22 are fixedly connected in a detachable manner, and the second housing 20 may also include a bottom wall provided in one of the openings 221 .
  • the battery module 60 is located in the accommodating space 222, and the first casing 10 covers an opening 221 of the second casing 20, so that the battery module 60 is located in the first casing body 10 and the interior of the second housing 20 .
  • the first resin layer 40 is disposed between the first case 10 and the second case 20 to prevent other impurities from entering the battery pack 100, so that the position where the two are connected can be waterproof, thereby achieving The battery module 60 inside the battery pack 100 is protected.
  • the first casing 10 includes a first edge portion 11 .
  • One side of the second shell 20 corresponds to the part of the end of the second shell 20 .
  • the first edge portion 11 is fixed on the second casing 20 .
  • the first edge portion 11 is provided with a first groove 111 and a second groove 112, the first casing 10 is provided with a first hole 113 passing through itself, and the second groove 112 is provided in the One side of the first groove 111 is communicated with the first groove 111 , and the first hole 113 is provided on the side of the second groove 112 away from the first groove 111 . Further, the first groove 111 is closer to the battery module 60 disposed in the second casing 20 than the second groove 112 , and the second groove 112 is closer to the battery module 60 than the second groove 112 . A hole 113 is closer to the battery module 60 disposed in the second casing 20 .
  • the first groove 111 is formed concavely from the first casing 10 in a direction away from the second casing 20 .
  • the first resin layer 40 is disposed in the first groove 111 and is connected to the The inner wall of the first groove 111 is bonded and fixed.
  • the inner wall of the first groove 111 refers to the position where the first resin layer 40 contacts the first groove 111 .
  • the first groove 111 is provided on the first edge portion 11, and the first resin layer 40 is provided at the first groove 111. If the first resin layer 40 is deformed, the first resin layer 40 is deformed.
  • the sidewall of a groove 111 can limit the deformation of the first resin layer 40 to extend toward the inside of the first casing 10 , thereby restraining the first resin layer 40 and the first resin layer 40 inside the first casing 10 . interfere with other structures.
  • the cross section of the first groove 111 is arc-shaped.
  • the cross section of the first groove 111 is arc-shaped.
  • the cross-section of the first groove 111 may also be in other shapes, such as a triangle or a square.
  • the second groove 112 is recessed from the first casing 10 in a direction away from the second casing 20, and the first casing 10 provided with the first resin layer 40 is assembled to the first casing 10.
  • the first shell 10 and the second shell 20 press the first resin layer 40 at the same time, the first resin layer 40 can be deformed, and the deformed part is
  • the first resin layer 40 may be disposed at the second groove 112 , and the first casing 10 and the second casing 20 jointly fix the first resin layer 40 .
  • the first resin layer 40 When the first resin layer 40 is disposed in the second groove 112, the first resin layer 40 is in contact with the inner wall of the second groove 112, that is, the first resin layer 40 and the second groove 112 are in contact and connected, but not by means of bonding. Further, the inner wall of the second groove 112 refers to the part of the first resin layer 40 in contact with the second groove 112 .
  • the description will be made in conjunction with the X, Y, and Z coordinate axes, wherein the X, Y, and Z coordinate axes are perpendicular to each other.
  • the width of the second groove 112 is W 1
  • the range of W 1 is 0.2T to 0.25T.
  • the height of the second groove 112 is H 1
  • the range of H 1 is 0.2T to 0.25T.
  • the first direction is along the X-axis direction
  • the second direction is along the Z-axis direction
  • the second direction is perpendicular to the first direction and is also parallel to the second groove 112 vertical.
  • T is a value in a specific range
  • the values of W 1 and H 1 vary with the change of T.
  • the first hole 113 is used for placing fasteners for fixing the first housing 10 and the second housing 20 , so as to realize the first housing 10 and the second housing 20 are locked and fixed
  • the first hole 113 is a circular hole.
  • the first hole 113 is farther away from the receiving space 222, so that the first resin layer 40 is relatively
  • the first hole 113 is closer to the battery module 60 than the first hole 113 to restrict the flow of water or other liquids into the battery pack 100 from the first hole 113 , thereby reducing the influence of other impurities entering the battery pack 100 .
  • the third direction is along the Y-axis direction, and the third direction is perpendicular to the first direction and the second direction at the same time.
  • the first housing 10 is provided with a plurality of the first holes 113 , and the plurality of the first holes 113 are arranged along the circumferential direction of the first edge portion 11 .
  • the first edge portion 11 is substantially rectangular, and a plurality of the first holes 113 are enclosed in a rectangular shape.
  • substantially rectangular means looking like a rectangle , and it has a deviation of +/-5mm to +/-10mm. It can be understood that, in other embodiments, the shape of the first edge portion 11 is not limited to this.
  • a plurality of the first holes 113 are provided, so that the plurality of the first holes 113 are arranged on the first edge portion 11 in a surrounding structure, so that the fasteners can be simultaneously arranged in a plurality of positions, so that all the The connection between the first casing 10 and the second casing 20 is tighter.
  • the first edge portion 11 further has a first convex portion 114 , and the second groove 112 is closer to the battery mold than the first convex portion 114 Group 60.
  • a first concave portion M exists between the first edge portion 11 and the second edge portion 21 , the first concave portion M communicates with the second groove 112 , and the first convex portion 114 is located in the second groove 112 .
  • the first protruding portion 114 is provided on the first edge portion 11 so that a gap is formed between the first casing 10 and the second casing 20 . If the second groove 112 cannot accommodate the gap After the deformation of the first resin layer 40 , the first resin layer 40 can be disposed in the first concave portion M, as shown in FIG. 12 .
  • the first resin layer 40 extends to the first concave portion M, the portion extending to the first concave portion M is in contact with the first case 10 and the second case 20 . .
  • the first resin layer 40 is directly connected to the inner wall M1 of the first recess M.
  • a portion of the first edge portion 11 close to the battery module 60 extends into the second casing 20 .
  • a portion of the first edge portion 11 close to the battery module 60 is provided with a first region portion 115 .
  • the part is the first section 115
  • the part inside the second housing 20 is the part located in the receiving space 222 .
  • the first section 115 is closer to the battery module 60 than the first groove 111 , and the first section 115 extends into the second casing 20 by a predetermined distance.
  • the first recess 111 communicates with the second recess O, and when the first recess 111 and the When the second groove 112 cannot accommodate the first resin layer 40 , the first resin layer 40 can extend from the first groove 111 to the second recess O, so that the first casing can 10 and the second casing 20 can better accommodate the first resin layer 40 .
  • the second edge portion 21 includes a first surface 210 and a second surface 211. Along the Z-axis direction, the second surface 211 and the first groove 111 are disposed opposite to each other.
  • the first resin layer 40 and the The contact connection of the second surface 211 can more effectively inhibit the entry of other impurities into the battery pack 100 and reduce the influence of other impurities on the battery pack 100 .
  • the first surface 210 is disposed on the second edge portion 21 near the inner wall of the battery module 60 , and the first resin layer 40 is disposed between the first region 115 and the first surface 210 .
  • the first resin layer 40 is connected to the first surface 210 in contact with the first resin layer 40 to prevent the first resin layer 40 from moving in a direction opposite to the Z-axis direction and reduce the impact of the first resin layer 40 on the battery. Mod 60 effects.
  • the second housing 20 includes four interconnected side walls 22 , the four side walls 22 enclose a middle frame structure, and the four side walls 22 form a receiving space 222 , the battery module 60 is located in the receiving space 222 .
  • the second shell 20 includes a second edge portion 21 , and the second edge portion 21 is an edge portion of the second shell 20 facing the first shell 10 and facing the first shell 10 .
  • the edge part 11, the first shell 10 and the second shell 20 are fixed by arranging fasteners at the positions of the first edge part 11 and the second edge part 21, thus, the fixing between the first casing 10 and the second casing 20 is realized.
  • the second surface 211 included in the second edge portion 21 is a surface directly corresponding to the first casing 10 along the second direction.
  • the second surface 211 is a plane structure, and its flatness is A, preferably, the value of A is Smm, where the unit of the flatness A is the same as that of the first resin layer 40, as described in the first When the resin layer 40 has a length of 10 mm in a natural state, the unit of the flatness A is also millimeters.
  • the flatness A is less than or equal to 0.3 mm, and when the first resin layer 40 is compressed, the first resin layer 40 needs to cover the tolerance of the flatness A, so that achieve a closed effect.
  • the length of the first resin layer 40 in a natural state is the length along the second direction.
  • the length of the first resin layer 40 in a natural state is the longest vertical length along the second direction.
  • the cross section of the first resin layer 40 along the second direction is substantially circular, and the length of the first resin layer 40 in a natural state is the diameter of the circle.
  • the thickness of the second edge portion 21 is T, and the thickness T is the value within the aforementioned specific range.
  • the height and width of the second groove 112 are the same as those of the second edge portion 21 . Thickness T is associated. Further, the thickness T ranges from 2.5 mm to 3 mm. Specifically, in an embodiment, the value of the thickness T is 2.5 mm. It can be understood that, in other embodiments, the value of the thickness T may also be 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, and the like.
  • the width W 1 and the height H 1 of the second groove 112 are set to be 0.2T to 0.25T, so that the second groove 112 can better accommodate the compression of the first resin layer 40 .
  • the first resin layer 40 is formed by placing a liquid resin in the first groove 111 and then fixing it.
  • the first resin layer 40 includes the first part 41 and the The second part 42 to which the first part 41 is connected is described.
  • the first resin layer 40 includes a sealant, and the setting process of the sealant is to use a specific nozzle size, and use a device with different glue viscometers to dispense liquid silica gel on the first shell.
  • the first groove 111 of the body 10 is then fired at a temperature of 100° C. to 200° C. to achieve drying of the sealant.
  • the first resin layer 40 is deformed under the pressing action of the first casing 10 and the second casing 20 , so as to be disposed between the first casing 10 and the second casing 20 .
  • other impurities such as water, are inhibited from entering the battery pack 100 , thereby reducing the influence of other impurities on the battery pack 100 .
  • the first portion 41 corresponds to the first hole 113 and is closer to the battery mold than the first hole 113 Group 60.
  • the first portion 41 is substantially arc-shaped, and is disposed along a part of the edge of the first hole 113 , so that the first resin layer 40 can bypass the first hole 113 , avoid affecting the connection between the first shell 10 and the second shell 20, and the sealing performance is better.
  • the first hole 113 is closer to the battery module 60 than the second portion 42 , and the second portion 42 is substantially linear. It can be understood that, in other embodiments, the second portion 42 and the first hole 113 may also be on a straight line, that is, the distance between the two is the same from the battery module 60 .
  • the shapes of the first portion 41 and the second portion 42 are not limited to this. For example, when the first hole 113 is a square, the shape of the first portion 41 also changes accordingly.
  • the cross-section is curved.
  • the natural length of the first resin layer 40 is W 3 , as shown in FIG. 7 .
  • the first resin layer 40 is in a compressed state, and the compression amount is 20% to 30% of the length of the first resin layer 40 in a natural state. Further, the first resin layer 40 is compressed.
  • the compression amount of the layer 40 is Lmm
  • the length of the first resin layer 40 in the natural state is in mm
  • the compression amount of the first resin layer 40 is also in mm. In the natural state, the length is 10 mm
  • the compression amount of the first resin layer 40 is between 2 mm and 3 mm.
  • the compression amount is 20% to 21.4% (including 21.4%) of the length of the first resin layer 40 in a natural state, which is beneficial to the assembly of the first casing 10 and the second casing 20 .
  • the compression amount is 21.4% to 25% (including 25%) of the length of the first resin layer 40 in a natural state.
  • the first resin layer 40 and the second edge portion 21 are stably connected to prevent other impurities from entering the battery pack 100 .
  • the compression amount is 25% to 27% of the length of the first resin layer 40 in a natural state
  • the battery pack 100 is stable in a higher temperature and high humidity environment, and other impurities are inhibited from entering the within the battery pack 100 .
  • the compression amount is 27% to 30% of the length of the first resin layer 40 in a natural state, and the first resin layer 40 is more arranged in the second groove 112 to more effectively suppress Other impurities enter into the battery pack 100 .
  • the upper limit of the compression amount of the first resin layer 40 can be calculated by dividing the flatness A of the second edge portion 21 by the initial height of the first resin layer 40 along the second direction, Specifically, the compression amount of the first resin layer 40 does not exceed the upper limit value, so as to further improve the reliability of the first resin layer 40 .
  • the battery pack 100 is subjected to an IPX7 waterproof rating test, the battery pack 100 is placed in a water tank, the battery pack 100 is immersed in water for 1 meter, and the battery pack 100 is disassembled after soaking for 30 minutes to detect whether there is any Water enters the battery pack 100, and the test results are shown in Table 1 below:
  • Compression IPX7 test results 0 to 10% Fail 10% to 20 (excluding 20%)% Fail 20% (inclusive) to 30% pass greater than or equal to 30% Fail
  • the battery pack 100 further includes a third casing 30 and a second resin layer 50 , the third casing 30 is disposed away from the second casing 20
  • the end of the first casing 10 , the first casing 10 , the second casing 20 and the third casing 30 together form a casing for accommodating the battery module 60 to protect the Battery module 60 .
  • the second resin layer 50 is disposed between the second casing 20 and the third casing 30 to effectively prevent other impurities from entering the battery pack 100 , thereby protecting the interior of the battery pack 100 the battery module 60.
  • the third shell 30 includes a third edge portion 31 , and the third edge portion 31 is the side of the third shell 30 facing the second shell 20 and the second shell 20 . the corresponding part of the end.
  • the second casing 20 includes another second edge portion 21 , and the third edge portion 31 is fixed to the second edge portion 21 .
  • the third edge portion 31 and the inside of the other second edge portion 21 can also be fixed by fasteners, such as screws.
  • the third edge portion 31 is provided with a third groove 311 and a fourth groove 312
  • the third housing 30 is provided with a third hole 313 passing through itself
  • the fourth groove 312 is disposed on one side of the third groove 311 and communicates with the third groove 311
  • the third hole 313 is disposed in the fourth groove 312 away from the third groove 311 one side of the groove 311 .
  • the third groove 311 is closer to the battery module 60 disposed in the second casing 20 than the fourth groove 312
  • the fourth groove 312 is closer to the battery module 60 than the fourth groove 312
  • the third hole 313 is closer to the battery module 60 disposed in the second casing 20 .
  • the third groove 311 is concavely formed from the third casing 30 in a direction away from the second casing 20 .
  • the second resin layer 50 is disposed in the third groove 311 and is connected to the third casing 30 .
  • the inner wall of the third groove 311 is adhered and fixed. Further, the inner wall of the third groove 311 refers to the position where the second resin layer 50 contacts the third groove 311 .
  • the sidewall of the third groove 311 can also limit the deformation of the second resin layer 50 to extend toward the interior of the third housing 30 to limit the second resin The layer 50 interferes with other structures located within the third housing 30 .
  • the fourth groove 312 is concavely formed from the third casing 30 in a direction away from the second casing 20 , and the third casing 30 provided with the second resin layer 50 is assembled to the first casing 30 .
  • the second shell 20 When the second shell 20 is on, the second shell 20 and the third shell 30 co-extrude the second resin layer 50, the second resin layer 50 can be deformed, and the deformed part is
  • the second resin layer 50 may be disposed at the fourth groove 312 , and the second housing 20 and the third housing 30 jointly fix the second resin layer 50 .
  • the second resin layer 50 When the second resin layer 50 is disposed in the fourth groove 312, the second resin layer 50 is in contact with the inner wall of the fourth groove 312, that is, the second resin layer 50 and the fourth groove 312 are in contact and connected, but are not connected by bonding. Further, the inner wall of the fourth groove 312 refers to the part of the second resin layer 50 in contact with the fourth groove 312 .
  • the width of the fourth groove 312 is W 2 , and the range of W 2 is 0.2T to 0.25T.
  • the height of the second groove 112 is H 1 , and the range of H 1 is 0.2T to 0.25T.
  • the second direction is perpendicular to the first direction and is also perpendicular to the first direction.
  • the fourth groove 312 is vertical.
  • T is the thickness of the second edge portion 21 , and the values of W 2 and H 2 vary with T.
  • the third hole 313 is used for placing fasteners for fixing the second casing 20 and the third casing 30, so as to realize the second casing 20 and the third casing 30 is locked and fixed
  • the third hole 313 is a circular hole.
  • the third hole 313 is farther away from the receiving space 222, so that the second resin layer 50 is relatively It is closer to the battery module 60 than the third hole 313 , preventing water or other liquids from flowing into the battery pack 100 from the third hole 313 , and effectively preventing other impurities from entering the battery pack 100 . , reducing the influence of other impurities on the battery pack 100 .
  • the third housing 30 is provided with a plurality of the third holes 313 , and the plurality of the third holes 313 are arranged along the circumferential direction of the third edge portion 31 .
  • the third edge portion 31 is substantially rectangular, and a plurality of the third holes 313 are surrounded to form a rectangular shape.
  • substantially rectangular means looking like a rectangle , and it has a deviation of +/-5mm to +/-10mm. It can be understood that, in other embodiments, the shape of the third edge portion 31 is not limited to this.
  • a plurality of the third holes 313 are provided, so that the plurality of the third holes 313 are arranged on the third edge portion 31 in a surrounding structure, so that the fasteners can be simultaneously arranged in a plurality of positions, so that all the The connection between the third casing 30 and the second casing 20 is tighter.
  • the third edge portion 31 further defines a third convex portion 314 , and the fourth groove 312 is closer to the battery than the third convex portion 314 Module 60.
  • the third protruding portion 314 is provided on the third edge portion 31 so that a gap is formed between the second casing 20 and the third casing 30 . If the fourth groove 312 cannot accommodate the gap After the deformation of the second resin layer 50, the second resin layer 50 can be disposed in the third recess N.
  • the portion extending to the third recess N is in contact with the second case 20 and the third case 30 .
  • a portion of the third edge portion 31 close to the battery module 60 extends into the second casing 20 .
  • a portion of the third edge portion 31 close to the battery module 60 is provided with a third section 315 , and the third section 315 is closer to the battery module 60 than the third groove 311 .
  • the third section 315 extends into a predetermined distance toward the inside of the second casing 20 .
  • a fourth recess P exists between the third section 315 and the second housing 20 , and the third recess 311 communicates with the fourth recess P.
  • the second resin layer 50 can extend from the third groove 311 to the fourth recess P, so that the third casing 30 and the second casing 20 can better accommodate the second resin layer 50 .
  • another second edge portion 21 also includes a second surface 211 , and the second surface 211 is a surface directly corresponding to the third housing 30 along the second direction.
  • the second surface 211 is a plane structure, and its flatness is B.
  • the value of B is also Smm.
  • the flatness B is less than or equal to 0.3 mm.
  • the second resin layer 50 is formed by placing liquid resin in the third groove 311 and then fixedly formed, and the second resin layer 50 has the same structure as the first resin layer 40 , the The second resin layer 50 includes a third portion 51 and a fourth portion 52 connected to the third portion 51 . Like the first resin layer 40 , the second resin layer 50 also includes a sealant, and the setting process is the same as that of the first resin layer 40 .
  • Shore hardness C of the first resin layer 40 and the second resin layer 50 ranges from 20° to 35°.
  • the hardness of the first resin layer 40 and the second resin layer 50 determines the force required to be compressed and the performance of restoring the original shape after being compressed. After continuous verification, when the hardness of the first resin layer 40 and the second resin layer 50 is in the range of 20° to 35°, the compressed performance and the original performance after deformation can effectively inhibit other Impurities entering the battery pack 100 can meet the IPX7 waterproof level test, for example.
  • the third portion 51 corresponds to the third hole 313 and is closer to the battery than the third hole 313 Module 60.
  • the second portion 42 is substantially arc-shaped, and is disposed along a part of the edge of the third hole 313 , so that the second resin layer 50 can bypass the third hole 313 , avoid affecting the connection between the second shell 20 and the third shell 30, and the sealing performance is better.
  • the third hole 313 when viewed along the Y direction, the third hole 313 is closer to the battery module 60 than the fourth portion 52 , and the fourth portion 52 is substantially linear. It can be understood that, in other embodiments, the fourth portion 52 and the third hole 313 may also be on a straight line, that is, the distance between the two and the battery module 60 is the same.
  • the shapes of the third portion 51 and the fourth portion 52 are not limited thereto. For example, when the third hole 313 is square, the shape of the third portion 51 also changes accordingly.
  • the second resin layer 50 is in a compressed state, and the compression amount is 20% to 30% of the length of the second resin layer 50 in a natural state.
  • the upper limit of the compression amount of the second resin layer 50 can be calculated by dividing the flatness B of the other second edge portion 21 by the initial height of the second resin layer 50 along the second direction Specifically, the compression amount of the second resin layer 50 does not exceed the upper limit value, so as to further improve the reliability of the second resin layer 50 .
  • the battery module 60 includes a plurality of battery cells 61 , and the plurality of the battery cells 61 are stacked along the second direction.
  • the battery cells 61 include an electrode assembly 611 , a metal part 612 and a battery cell 61 .
  • the core case 613, the cell case 613 is provided with a receiving cavity 6131, the electrode assembly 611 is accommodated in the receiving cavity 6131 of the cell case 613, and the metal part 612 is connected to the electrode assembly 611 and Extend from the cell housing 613 .
  • the cell case 613 may have an insulating layer, a metal layer and an adhesive layer, and the cell case 613 is bonded to the electrode assembly 611 through the adhesive layer, so as to realize the connection with the electrode assembly 611 .
  • the metal layer is located between the insulating layer and the adhesive layer, which can enhance the strength of the cell shell 613, and the insulating layer is far away from the electrode assembly 611, which can prevent external soda water from infiltrating into it, thereby Affect the use of the battery cell 61 .
  • the metal part 612 is used for connecting with the external structure, so that the battery cell 61 can communicate with the external structure.
  • the metal parts 612 of the two adjacent battery cells 61 are connected to realize the communication between the plurality of the battery cells 61 .
  • the metal parts 612 are tabs, and two adjacent battery cells 61 are connected by tabs.
  • the plurality of battery cells 61 are used to supply power to the electrical device, so that the electrical device can be started.
  • the battery pack 100 further includes a plurality of guards 70 , and the guards 70 are disposed between the battery module 60 and the second casing 20 for The battery module 60 is protected.
  • the protective member 70 is a profiling foam, which can be more fitted to the battery module 60 according to the outer contour design of the battery module 60 .
  • the guard 70 can prevent the battery module 60 from colliding with the second casing 20 , thereby preventing the second casing 20 from affecting the battery module 20 .
  • the group 60 is damaged, which reduces the probability of the safety problem of the battery module 60 .
  • the battery pack 100 further includes a fixing bracket 80 and a circuit board 90 , the fixing bracket 80 is accommodated in the second casing 20 , and the circuit board 90 is disposed on the fixing bracket 80 .
  • the fixing bracket 80 can be fixed in the second casing 20 by means of screw fastening or fixed in the second casing 20 by other means such as bonding and clamping.
  • the circuit board 90 can also be fixed on the fixing bracket 80 by means of screws, or fixed by means of bonding.
  • the circuit board 90 is connected to the battery module 60 , so as to monitor and control the battery module 60 , such as controlling the current and voltage of the battery module 60 . Further, the circuit board 90 is electrically connected to the metal part 612 on the battery core 61 .
  • the first housing 10 is also provided with a plug connector 116 , and the plug connector 116 is electrically connected to the circuit board 90 .
  • the connector of the electrical device is connected to the plug connector. 116 is turned on, so as to supply power to the electrical device.
  • the electrical device includes a main body and a battery pack 100 accommodated in the main body, and the battery pack 100 is any of the above-mentioned embodiments.
  • the battery pack 100 so that the electrical device has all the beneficial effects of the battery pack 100, will not be repeated here.
  • the electric device may be an electric vehicle, an electric bus, an electric vehicle, etc.
  • the main body is a vehicle body structure, and the battery pack 100 is provided in the vehicle body to supply power.
  • the electrical device may also be an energy storage device, an electric bicycle, a flying device, a hand-held electric device, such as a vacuum cleaner, a lawn mower and other devices.
  • another embodiment of the present application also provides a method for assembling a battery pack, including the following steps:
  • S104 Fix the first casing provided with the first resin layer to the second casing, and the first resin layer is located between the first casing and the second casing;
  • step S101 using a specific glue nozzle size, approximately between 0.5 and 1 mm, and using different glue viscosities and glue dispensing precisions, the liquid silica gel is punched at the first groove 111 of the first housing 10 .
  • step S102 baking is performed at a temperature of 100° C. to 120° C. for a long time, so that the silica gel at the first groove 111 is fixed and formed into the first resin layer 40 .
  • step S103 the battery module 60 is arranged in the second casing 20 through mechanical assembly, and further, the battery module 60 can be arranged in the second casing 20 by grasping by a robot internal.
  • step S104 the first casing 10 provided with the first resin layer 40 is fixed on the second casing 20, and the first resin layer 40 is located between the first casing 10 and the second casing 20. between the second housing 20 . Further, the first casing 10 and the second casing 20 can be connected by fasteners.
  • step S105 when the first resin layer 40 is provided between the first casing 10 and the second casing 20 , the first casing 10 and the second casing 20 are assembled together by fasteners. After the second casing 20 is fixed, the first resin layer 40 is pressed by the first casing 10 and the second casing 20 , so that the first resin layer 40 is deformed.
  • the compression amount of the first resin layer 40 is 20% to 30% of the length of the first resin layer 40 in a natural state.
  • the compression amount of the first resin layer 40 is Lmm, and the first The compression amount of the resin layer 40 and the length of the first resin layer 40 in the natural state are compared using the same unit.
  • the battery pack 100 includes the third case 30, when the third case 30 and the second case 20 are fixed, the third case 30 and the A second resin layer 50 is provided between the second casings 20 .
  • step S101 liquid silica gel is also punched at the third groove 311 of the third casing 30 .
  • step S102 baking is performed at a temperature of 100° C. to 120° C. for a long time, so that the silica gel at the third groove 311 is fixed and formed into the second resin layer 50 .
  • step S104 the third casing 30 provided with the second resin layer 50 is fixed on the second casing 20, and the second resin layer 50 is located between the third casing 30 and the second casing 20. between the second housing 20 . Further, the third casing 30 and the second casing 20 may be connected by fasteners.
  • step S105 when the second resin layer 50 is provided between the third housing 30 and the second housing 20, the third housing 30 and the After the second casing 20 is fixed, the second resin layer 50 is pressed by the third casing 30 and the second casing 20, so that the second resin layer 50 is deformed.
  • the amount of compression of the second resin layer 50 is 20% to 30% of the length of the second resin layer 50 in a natural state.
  • the amount of compression of the second resin layer 50 is Lmm, and the second The compression amount of the resin layer 50 and the length of the second resin layer 50 in the natural state are compared using the same unit.
  • the embodiments of the present application provide a battery pack, an electrical device, and an assembling method for the battery pack.
  • the first resin layer 40 between the first casing 10 and the second casing 20 is compressed by the After reaching 20% to 30% of its natural length, the first resin layer 40 can better seal the connection position of the first shell 10 and the second shell 20, effectively inhibiting other Impurities enter the battery pack 100 to reduce the influence of other impurities on the battery pack 100 .

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Abstract

一种电池组，包括电池模组，第一壳体和第二壳体，所述第一壳体和所述第二壳体形成有收容所述电池模组的收容空间，所述第一壳体包括第一边缘部，所述第一边缘部设有第一凹槽，所述第一凹槽内设有第一树脂层，所述第一树脂层与所述第一凹槽内壁粘接固定，所述第二壳体包括第二边缘部所述第一树脂层设于所述第一壳体和所述第二壳体之间，且与所述第二边缘部连接，所述第一凹槽内的第一树脂层处于压缩状态，且压缩量为所述第一树脂层在自然状态下长度的20％至30％。本申请还涉及一种用电装置及电池组的组装方法，通过采用上述的电池组，有效地抑制其他杂质进入电池组内，减少其他杂质对电池组的影响。

Description

电池组、用电装置及电池组的组装方法 技术领域
本申请涉及电池技术领域，尤其涉及一种电池组、用电装置及电池组的组装方法。
背景技术
现有的电池结构中，电池通常包括两个壳体和设于壳体的电池模组，两个壳体通过螺丝等紧固件件固定，两个壳体之间存有间隙，其他杂质可能通过壳体之间的间隙进入到电池内，影响电池的使用。
发明内容
有鉴于此，有必要提供一种电池组、用电装置及电池组的组装方法，旨在使得电池组有效地抑制其他杂质进入电池组内，减少其他杂质对电池组的影响。
本申请的实施例提供一种电池组，包括电池模组，第一壳体和第二壳体，所述第一壳体和所述第二壳体形成有收容所述电池模组的收容空间，所述第一壳体包括第一边缘部，所述第一边缘部设有第一凹槽，所述第一凹槽内设有第一树脂层，所述第一树脂层与所述第一凹槽内壁粘接固定，所述第二壳体包括第二边缘部，所述第一树脂层设于所述第一壳体和所述第二壳体之间，且与所述第二边缘部连接，所述第一凹槽内的第一树脂层处于压缩状态，且压缩量为所述第一树脂层在自然状态下长度的20％至30％。
一种可能实现的方式中，所述第一树脂层与所述第二边缘部接触连接。
一种可能实现的方式中，所述第一边缘部设有与所述第一凹槽连通的第二凹槽，所述第一树脂层设于所述第二凹槽，所述第一树脂层与所述第二凹槽的内壁连接。
一种可能实现的方式中，所述第一树脂层与所述第二凹槽的内壁接触连接。
一种可能实现的方式中，所述第一凹槽较所述第二凹槽更靠近所述电池模组。
一种可能实现的方式中，所述第一边缘部设有第一凸部，所述第二凹槽较所述第一凸部更靠近所述电池模组，所述第一边缘部和所述第二边缘部之间设有与所述第二凹槽连通的第一凹部，所述第一凸部位于所述第一凹部处，所述第一树脂层能够从所述第一凹部处向所述第一凸部处延伸，以能够容纳更多变形后的所述第一树脂层。
一种可能实现的方式中，所述第一树脂层通过将树脂设于所述第一凹槽 后固定形成。
一种可能实现的方式中，所述第二边缘部包括与所述第一边缘部连接的第二表面，所述第二表面为平面结构，且平面度为A，所述A小于或等于0.3mm。
一种可能实现的方式中，所述电池模组包括多个堆叠的电芯，多个所述电芯堆叠的方向为第二方向，沿第一方向，所述第二边缘部的厚度为T，所述第一边缘部和所述第二边缘部沿第二方向配合连接，沿所述第二方向，所述第二凹槽的高度为H 1，H 1的范围为0.2T至0.25T，所述第二方向垂直于所述第一方向。
一种可能实现的方式中，沿所述第一方向，所述第二凹槽的宽度为W 1，W 1的范围为0.2T至0.25T。
一种可能实现的方式中，所述第二边缘部的厚度T的范围为2.5mm至3mm。
一种可能实现的方式中，所述第一壳体设有第一孔，所述第一树脂层包括第一部和第二部，所述第一部连接所述第二部，沿第三方向观察，所述第一部较所述第一孔靠近所述电池模组，所述第三方向同时垂直于所述第一方向和所述第二方向。
一种可能实现的方式中，所述第一树脂层的邵氏硬度C为20°至35°。
一种可能实现的方式中，所述第一壳体包括连接于第一边缘部的第一区部，所述第一区部设于所述第二壳体内，且所述第一区部和所述第二壳体之间设有第二凹部，所述第一凹槽与所述第二凹部连通，以能够更好的收容所述第一树脂层。
一种可能实现的方式中，所述第二凹部内设有所述第一树脂层。
一种可能实现的方式中，所述电池组还包括防护件，所述防护件设于所述电池模组和所述第二壳体之间，用以保护所述电池模组。
一种可能实现的方式中，所述压缩量为所述第一树脂层在自然状态下长度的20％至21.4％。
一种可能实现的方式中，所述压缩量为所述第一树脂层在自然状态下长度的21.4％至25％。
一种可能实现的方式中，所述压缩量为所述第一树脂层在自然状态下长度的25％至27％。
一种可能实现的方式中，所述压缩量为所述第一树脂层在自然状态下长度的27％至30％，能够抑制其他杂质进入所述电池组内。
本申请还提供一种用电装置，包括本体和收容于所述本体中的电池组，所述电池组为上述中任一所述的电池组。
本申请又提供一种电池组的组装方法，包括如下步骤：
将树脂注入第一壳体的第一凹槽处；
于所述第一凹槽处加工所述树脂形成第一树脂层；
固定电池模组于第二壳体内；
将设有所述第一树脂层的第一壳体固定于所述第二壳体，所述第一树脂层位于所述第一壳体和所述第二壳体之间；
通过所述第一壳体和所述第二壳体挤压所述第一树脂层，所述第一树脂层的压缩量为其在自然状态下长度的20％至30％。
本申请提供的电池组、用电设备及电池组的组装方法通过将所述第一树脂层设于所述第一凹槽内，且在所述第一壳体和所述第二壳体共同压缩所述第一树脂层时，所述第一树脂层的压缩量为其在自然状态下长度的20％至30％，所述第一树脂层能更有效地抑制其他杂质进入电池组内，比如说水，减少其他杂质对电池组的影响。
附图说明
图1为本申请一实施例中电池组的立体示意图。
图2为图1所示的电池组沿II-II方向的剖视示意图。
图3为图2所示的电池组设有第一树脂层的剖视示意图。
图4为另一实施例中电池组设有第一树脂层的剖视示意图。
图5为图1中所示的电池组的第一壳体的立体示意图。
图6为图5所示的电池组的第一壳体的俯视示意图。
图7为图6所示的电池组的第一壳体沿VII-VII方向的剖视示意图。
图8为本申请一实施例中电池组设有第三壳体的剖视示意图。
图9为图8所示的电池组设有第二树脂层的剖视示意图。
图10为图6中所示的电池组的第三壳体的俯视示意图。
图11为本申请另一实施例中电池组的第一壳体和第三壳体上设有凸部的剖视示意图。
图12为图11所示的电池组中第一树脂层和第二树脂层朝凸部延伸的剖视示意图。
图13为图1所示的电池组的分解示意图。
图14为电芯的分解示意图。
图15为本申请又一实施例中电池组的组装方法的流程图。
主要元件符号说明
电池组                      100
第一壳体                    10
第一边缘部                  11
第一凹槽                    111
第二凹槽                    112
第二凹槽的高度              H 1
第二凹槽的宽度              W 1
第一孔                      113
第一凸部                     114
第一区部                     115
插接头                       116
虚线                         K
第一凹部                     M
内壁                         M 1
第二凹部                     O
第二壳体                     20
第二边缘部                   21
第一表面                     210
第二表面                     211
第二边缘部的厚度             T
侧壁                         22
开口                         221
收容空间                     222
第三壳体                     30
第三边缘部                   31
第三凹槽                     311
第四凹槽                     312
第四凹槽的高度               H 2
第四凹槽的宽度               W 2
第三孔                       313
第三凸部                     314
第三区部                     315
第三凹部                     N
第四凹部                     P
第一树脂层                   40
第一部                       41
第二部                       42
第一树脂层的自然长度         W 3
第二树脂层                   50
第三部                       51
第四部                       52
电池模组                     60
电芯                         61
电极组件                     611
金属部                       612
电芯壳体                     613
收容腔                      6131
防护件                      70
固定支架                    80
电路板                      90
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。
下文，将详细地描述本申请的实施方式。但是，本申请可体现为许多不同的形式，并且不应解释为限于本文阐释的示例性实施方式。而是，提供这些示例性实施方式，从而使本申请透彻的和详细的向本领域技术人员传达。
另外，为了简洁和清楚，在附图中，各种组件、层的尺寸或厚度可被放大。遍及全文，相同的数值指相同的要素。如本文所使用，术语“及/或”、“以及/或者”包括一个或多个相关列举项目的任何和所有组合。另外，应当理解，当要素A被称为“连接”要素B时，要素A可直接连接至要素B，或可能存在中间要素C并且要素A和要素B可彼此间接连接。
进一步，当描述本申请的实施方式时使用“可”指“本申请的一个或多个实施方式”。
本文使用的专业术语是为了描述具体实施方式的目的并且不旨在限制本申请。如本文所使用，单数形式旨在也包括复数形式，除非上下文另外明确指出。应进一步理解，术语“包括”，当在本说明书中使用时，指存在叙述的特征、数值、步骤、操作、要素和/或组分，但是不排除存在或增加一个或多个其他特征、数值、步骤、操作、要素、组分和/或其组合。
空间相关术语，比如“上”等可在本文用于方便描述，以描述如图中阐释的一个要素或特征与另一要素(多个要素)或特征(多个特征)的关系。应理解，除了图中描述的方向之外，空间相关术语旨在包括设备或装置在使用或操作中的不同方向。例如，如果将图中的设备翻转，则描述为在其他要素或特征“上方”或“上”的要素将定向在其他要素或特征的“下方”或“下面”。因此，示例性术语“上”可包括上面和下面的方向。应理解，尽管术语第一、第二、第三等可在本文用于描述各种要素、组分、区域、层和/或部分，但是这些要素、组分、区域、层和/或部分不应受这些术语的限制。这些术语用于区分一个要素、组分、区域、层或部分与另一要素、组分、区域、层或部分。因此，下面讨论的第一要素、组分、区域、层或部分可称为第二要素、组分、区域、层或部分，而不背离示例性实施方式的教导。
本申请的实施例提供一种电池组，包括电池模组、第一壳体和第二壳体，所述第一壳体和所述第二壳体形成有收容所述电池模组的收容空间，所述第 一壳体包括第一边缘部，所述第一边缘部设有第一凹槽，所述第一凹槽内设有第一树脂层，所述第一树脂层与所述第一凹槽内壁粘接固定，所述第二壳体包括第二边缘部，所述第一树脂层设于所述第一壳体和所述第二壳体之间，且与所述第二边缘部连接，所述第一凹槽内的第一树脂层处于压缩状态，且压缩量为所述第一树脂层在自然状态下长度的20％至30％。
采用上述的电池组，在所述第一壳体和所述第二壳体之间设置所述第一树脂层，所述第一树脂层在所述第一凹槽内处于压缩状态，且所述第一树脂层的压缩量为所述第一树脂层在自然状态下长度的20％至30％。有效地抑制其他杂质进入电池组内，减少其他杂质对电池组的影响。
下面将结合附图对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。
请参阅图1、图2和图3，提供一种电池组100，包括第一壳体10、第二壳体20、第一树脂层40和电池模组60，所述第一壳体10通过紧固件，如螺丝等固定于所述第二壳体20上。所述第二壳体20有四个相互连接的侧壁22，四个侧壁22围合形成一个两端设置有开口221的中框结构，四个侧壁22形成收容空间222，所述第一壳体10用于封闭所述开口221。优选的，四个侧壁22可以为一体成型结构，比如铝挤工艺。可以理解的是，在其他实施例中，四个侧壁22与可通过可拆卸的方式固定连接，所述第二壳体20也可以包括设于其中一所述开口221的底壁。
所述电池模组60位于所述收容空间222内，所述第一壳体10将所述第二壳体20的一个开口221覆盖住，从而使得所述电池模组60位于所述第一壳体10和所述第二壳体20的内部。所述第一树脂层40设于所述第一壳体10和所述第二壳体20之间，抑制其他杂质进入电池组100内，使得在二者相连接的位置能够防水，从而起到保护所述电池组100内部的电池模组60。
请参阅图2、图3、图5和图6，具体的，所述第一壳体10包括第一边缘部11，所述第一边缘部11为所述第一壳体10朝向所述第二壳体20一侧与所述第二壳体20的端部相对应的部分。在所述第一壳体10和所述第二壳体20固定连接时，所述第一边缘部11固定于所述第二壳体20上。
所述第一边缘部11设有第一凹槽111、第二凹槽112，所述第一壳体10设有贯穿其自身的第一孔113，所述第二凹槽112设于所述第一凹槽111的一侧且与所述第一凹槽111连通，所述第一孔113设于所述第二凹槽112远离所述第一凹槽111的一侧。进一步的，所述第一凹槽111相较于所述第二凹槽112靠近设于所述第二壳体20内的电池模组60，所述第二凹槽112相较于所述第一孔113更靠近设于所述第二壳体20内的电池模组60。
所述第一凹槽111自所述第一壳体10朝远离所述第二壳体20的方向凹陷形成，所述第一树脂层40设于所述第一凹槽111，且与所述第一凹槽111的内壁粘接固定。例如，所述第一凹槽111的内壁指所述第一树脂层40与所述第一凹槽111相接触的位置。在所述第一边缘部11设置所述第一凹槽111， 将所述第一树脂层40设于所述第一凹槽111处，如果所述第一树脂层40发生形变，所述第一凹槽111的侧壁能够限制形变的所述第一树脂层40朝所述第一壳体10的内部延伸，从而限制所述第一树脂层40和位于所述第一壳体10内的其他结构发生干涉。
在本实施例中，优选的，所述第一凹槽111的截面呈圆弧形。通过将所述第一凹槽111设置为圆弧形，一方面能够增加所述第一壳体10和所述第二壳体20之间的封闭面积，另一方面在所述第一壳体10和所述第二壳体20挤压所述第一树脂层40时，所述第一树脂层40的压缩量更均匀，同时，设置圆弧形的第一凹槽111，所述第一树脂层40能够更好地填满所述第一凹槽111。
请参阅图4，可以理解的是，在其他实施例中，所述第一凹槽111的截面还可呈其他形状，例如三角形或方形。
所述第二凹槽112自所述第一壳体10朝远离所述第二壳体20的方向凹陷形成，将设有所述第一树脂层40的第一壳体10组装至所述第二壳体20上时，所述第一壳体10和所述第二壳体20同时挤压所述第一树脂层40，所述第一树脂层40能够发生形变，发生形变后的部分所述第一树脂层40可设于所述第二凹槽112处，所述第一壳体10和所述第二壳体20共同固定所述第一树脂层40。而当所述第一树脂层40设于所述第二凹槽112内时，所述第一树脂层40的与所述第二凹槽112的内壁为接触连接，即所述第一树脂层40与所述第二凹槽112之间相接触且连接，但并非是通过粘接的方式进行连接。进一步地，所述第二凹槽112的内壁指所述第一树脂层40与所述第二凹槽112相接触的部分。
为更好的叙述各结构之间的关系，将结合X、Y、Z坐标轴进行说明，其中，X、Y、Z坐标轴两两相互垂直。例如，沿第一方向，所述第二凹槽112的宽度为W 1，W 1的范围为0.2T至0.25T。例如，沿第二方向，所述第二凹槽112的高度为H 1，H 1的范围为0.2T至0.25T。在本实施例中，所述第一方向为沿X轴方向，第二方向为沿Z轴方向，且所述第二方向与所述第一方向垂直的同时也与所述第二凹槽112垂直。其中，T为特定范围的值，而W 1和H 1的数值是随T的变化而变化。
请参阅图5和图6，优选的，所述第一孔113处用以放置固定所述第一壳体10和所述第二壳体20的紧固件，从而实现所述第一壳体10和所述第二壳体20的锁紧固定，在一实施例中，所述第一孔113为圆形孔。例如，沿第三方向观察，相较于所述第一凹槽111和所述第二凹槽112，所述第一孔113更加远离所述收容空间222，使得所述第一树脂层40相较于所述第一孔113更加靠近所述电池模组60，限制水或其他液体从所述第一孔113处流入所述电池组100内部，减少其他杂质进入电池组100的影响。在本实施例中，所述第三方向为沿Y轴方向，且所述第三方向同时垂直于所述第一方向和所述第二方向。
在本实施例中，所述第一壳体10设有多个所述第一孔113，多个所述第一孔113沿所述第一边缘部11周向设置。优选的，沿Z方向观察，所述第一边缘部11大致呈长方形状，多个所述第一孔113围设成一长方形状，请结合图5，“大致呈长方形”为看起来像长方形，且其存在+/-5mm至+/-10mm的偏差。可以理解的是，在其他实施例中，若所述第一边缘部11的形状不限于此。设置多个所述第一孔113，以使得多个所述第一孔113呈环绕式的结构设于所述第一边缘部11上，以能够在多个位置同时设置紧固件，使得所述第一壳体10和所述第二壳体20的连接更加紧密。
请参阅图11，在一实施例中，所述第一边缘部11还设有第一凸部114，所述第二凹槽112相较于所述第一凸部114更加靠近所述电池模组60。所述第一边缘部11和所述第二边缘部21之间存在第一凹部M，所述第一凹部M与所述第二凹槽112连通，所述第一凸部114位于所述第一凹部M处。在所述第一边缘部11上设置所述第一凸部114，使得所述第一壳体10和所述第二壳体20之间形成间隙，如果所述第二凹槽112内无法容纳变形后的所述第一树脂层40，则所述第一树脂层40可设于所述第一凹部M中，如图12所示。
如果所述第一树脂层40延伸至所述第一凹部M处，其延伸至所述第一凹部M的部分与所述第一壳体10和所述第二壳体20之间为接触连接。优选的，所述第一树脂层40和所述第一凹部M的内壁M 1直接接触连接。
请再参阅图2，靠近所述电池模组60的部分所述第一边缘部11延伸至所述第二壳体20内。具体的，所述第一边缘部11靠近所述电池模组60的部分设有第一区部115，例如，以图中的虚线K为分界线，设于所述第二壳体20内的部分为所述第一区部115，所述第二壳体20内的部分为位于所述收容空间222中的部分。所述第一区部115较所述第一凹槽111靠近所述电池模组60，且所述第一区部115朝所述第二壳体20内部伸入预设距离。所述第一区部115与所述第二壳体20之间存在第二凹部O，所述第一凹槽111与所述第二凹部O连通，当所述第一凹槽111和所述第二凹槽112无法容纳所述第一树脂层40时，所述第一树脂层40可从所述第一凹槽111向所述第二凹部O处延伸，以使得所述第一壳体10和所述第二壳体20能够更好的收容所述第一树脂层40。
所述第二边缘部21包括第一表面210和第二表面211，沿Z轴方向，所述第二表面211和所述第一凹槽111相对设置，所述第一树脂层40和所述第二表面211接触连接，更有效地抑制其他杂质进入所述电池组10O内，减少其他杂质对所述电池组100的影响。所述第一表面210设于所述第二边缘部21靠近所述电池模组60的内壁，所述第一树脂层40设于所述第一区部115和所述第一表面210之间。优选的，所述第一树脂层40和所述第一表面210接触连接，抑制所述第一树脂层40沿与Z轴方向相反的方向移动，减少所述第一树脂层40对所述电池模组60的影响。
请参阅图1、图2和图3，所述第二壳体20包括四个相互连接的侧壁22，四个所述侧壁22围合形成中框结构，四个侧壁22形成收容空间222，所述电池模组60位于所述收容空间222内。所述第二壳体20包括第二边缘部21，所述第二边缘部21为所述第二壳体20朝向所述第一壳体10一侧的沿边部分，且正对所述第一边缘部11，所述第一壳体10和所述第二壳体20之间通过在所述第一边缘部11和所述第二边缘部21位置处设置紧固件将二者进行固定，从而实现所述第一壳体10和所述第二壳体20之间的固定。
所述第二边缘部21包括的所述第二表面211为沿第二方向与所述第一壳体10正对应的面。所述第二表面211为平面结构，且其平面度为A，优选的，A的值为Smm，此处平面度A的单位与所述第一树脂层40的单位相同，如所述第一树脂层40在自然状态下长度为10mm时，所述平面度A的单位也为毫米。在一实施例中，沿所述第二方向，平面度A小于或等于0.3mm，在所述第一树脂层40被压缩时，所述第一树脂层40需要覆盖平面度A的公差，从而达到封闭的效果。
沿所述第二方向，所述第一树脂层40在自然状态下长度为沿所述第二方向的长度。优选的，所述第一树脂层40在自然状态下长度为沿所述第二方向最长的垂直长度。优选的，所述第一树脂层40沿所述第二方向的截面大致为圆形，所述第一树脂层40在自然状态下长度为圆的直径。
沿所述第二方向，所述第二边缘部21的厚度为T，该厚度T即为前述特定范围的值，所述第二凹槽112的高度和宽度与所述第二边缘部21的厚度T相关联。进一步地，厚度T的范围为2.5mm至3mm，具体的，在一实施例中，厚度T的值为2.5mm。可以理解的是，在其他实施例中，厚度T的值还可为2.6mm、2.7mm、2.8mm、2.9mm等。而所述第二凹槽112的宽度W 1和高度H 1设置为0.2T至0.25T，使得其能够更好的收容所述第一树脂层40的压缩量。
请参阅图3、图6和图7，所述第一树脂层40通过将液态树脂设于所述第一凹槽111后固定形成，所述第一树脂层40包括第一部41和与所述第一部41连接的第二部42。在一实施例中，所述第一树脂层40包括密封胶，密封胶的设置过程为采用特定的胶嘴尺寸，使用不同胶水粘度计出胶精度的装置将液态硅胶打在所述第一壳体10的第一凹槽111处，再在100℃至200℃的温度下进行火烤，实现密封胶的烘干。所述第一树脂层40在所述第一壳体10和所述第二壳体20的挤压作用下发生形变，从而设于所述第一壳体10和所述第二壳体20之间的间隙中，抑制其他杂质进入所述电池组100内，比如水，减少其他杂质对所述电池组100的影响。
所述第一树脂层40位于所述第一凹槽111处时，所述第一部41与所述第一孔113相对应，且相较于所述第一孔113更靠近所述电池模组60。优选的，沿Z方向观察，所述第一部41大致呈弧形，且沿所述第一孔113的部分边缘设置，以使得所述第一树脂层40能够绕开所述第一孔113，避免影响所 述第一壳体10和所述第二壳体20的连接，且封闭性能更好。
在一实施例中，沿Y方向观察，所述第一孔113相较于所述第二部42更加靠近所述电池模组60，且所述第二部42大致呈直线状。可以理解的是，在其他实施例中，所述第二部42也可与所述第一孔113在一条直线上，即二者距离所述电池模组60的距离相同。所述第一部41和所述第二部42的形状也不限于此，如所述第一孔113为方形时，所述第一部41的形状也随之改变。
所述第一树脂层40未被压缩呈自然状态下时，截面呈曲面形，所述第一树脂层40的自然长度为W 3，如图7所示。请参阅图3，为所述第一树脂层40处于压缩时的状态，其压缩量为所述第一树脂层40在自然状态下长度的20％至30％，进一步地，所述第一树脂层40的压缩量为Lmm，所述第一树脂层40在自然状态下的长度以mm为单位，所述第一树脂层40的压缩量也是以mm为单位，如所述第一树脂层40在自然状态先的长度为10mm，则所述第一树脂层40的压缩量为2mm至3mm之间。
优选的，其压缩量为所述第一树脂层40在自然状态下长度的20％至21.4％(含21.4％)，有利于所述第一壳体10和所述第二壳体20的组装。
优选的，其压缩量为所述第一树脂层40在自然状态下长度的21.4％至25％(含25％)。所述第一树脂层40和所述第二边缘部21稳定连接，抑制其他杂质进入所述电池组100内。
优选的，其压缩量为所述第一树脂层40在自然状态下长度的25％至27％，所述电池组100在更高温度和高湿度的环境下保持稳定，抑制其他杂质进入所述电池组100内。
优选的，其压缩量为所述第一树脂层40在自然状态下长度的27％至30％，所述第一树脂层40更多地设于所述第二凹槽112，更有效地抑制其他杂质进入所述电池组100内。
优选的，所述第一树脂层40的压缩量的上限值可通过第二边缘部21的平面度A除以所述第一树脂层40沿所述第二方向的初始高度的方法算出，具体的，所述第一树脂层40的压缩量不超过该上限值，以进一步提升所述第一树脂层40的可靠性。
对所述电池组100进行IPX7防水等级测试，将所述电池组100放在水箱中，所述电池组100浸泡在水下1米，浸泡30分钟后拆开所述电池组100，检测是否有水进入所述电池组100内，测试结果如下表1所示：
表1
压缩量 IPX7测试结果
0至10％ 不通过
10％至20(不含20％)％ 不通过
20％(含20％)至30％ 通过
大于或者等于30％ 不通过
将所述电池组100放置于不同的环境下后进行IPX7防水等级测试，将所述电池组100放在水箱中，所述电池组100浸泡在水下1米，浸泡30分钟后拆开所述电池组100后，检测是否有水进入所述电池组100内，测试结果如下表2所示：
表2
Figure PCTCN2021074454-appb-000001
请参阅图8和图9，在一实施例中，所述电池组100还包括第三壳体30和第二树脂层50，所述第三壳体30设于所述第二壳体20远离所述第一壳体10的端部，所述第一壳体10、所述第二壳体20和所述第三壳体30共同形成收容所述电池模组60的外壳，以保护所述电池模组60。所述第二树脂层50设于所述第二壳体20和所述第三壳体30之间，有效地抑制其他杂质进入所述电池组100内，从而起到保护所述电池组100内部的电池模组60。
具体的，所述第三壳体30包括第三边缘部31，所述第三边缘部31为所述第三壳体30朝向所述第二壳体20一侧与所述第二壳体20的端部相对应的部分。所述第二壳体20包括另一所述第二边缘部21，所述第三边缘部31与所述第二边缘部21固定。优选的，所述第三边缘部31和另一所述第二边缘部21内部之间也可通过紧固件，如螺丝进行固定。
请参阅图8、图9和图10，所述第三边缘部31设有第三凹槽311、第四凹槽312，所述第三壳体30设有贯穿其自身的第三孔313，所述第四凹槽312设于所述第三凹槽311的一侧且与所述第三凹槽311连通，所述第三孔313设于所述第四凹槽312远离所述第三凹槽311的一侧。进一步的，所述第三凹槽311相较于所述第四凹槽312更加靠近设于所述第二壳体20内的电池模组60，所述第四凹槽312相较于所述第三孔313更靠近设于所述第二壳体20内的电池模组60。
所述第三凹槽311自所述第三壳体30朝远离所述第二壳体20的方向凹陷形成，所述第二树脂层50设于所述第三凹槽311，且与所述第三凹槽311的内壁粘接固定。进一步地，所述第三凹槽311的内壁指所述第二树脂层50与所述第三凹槽311相接触的位置。与所述第一凹槽111相同，所述第三凹槽311的侧壁也可限制形变的所述第二树脂层50朝所述第三壳体30内部延伸，以限制所述第二树脂层50和位于所述第三壳体30内的其他结构发生干涉。
所述第四凹槽312自所述第三壳体30朝远离所述第二壳体20的方向凹 陷形成，将设有所述第二树脂层50的第三壳体30组装至所述第二壳体20上时，所述第二壳体20和所述第三壳体30共同挤压所述第二树脂层50，所述第二树脂层50能够发生形变，发生形变后的部分所述第二树脂层50可设于所述第四凹槽312处，所述第二壳体20和所述第三壳体30共同固定所述第二树脂层50。而当所述第二树脂层50设于所述第四凹槽312内时，所述第二树脂层50的与所述第四凹槽312的内壁为接触连接，即所述第二树脂层50与所述第四凹槽312之间相接触且连接，但并非是通过粘接的方式进行连接。进一步地，所述第四凹槽312的内壁指所述第二树脂层50与所述第四凹槽312相接触的部分。
例如，沿所述第一方向，所述第四凹槽312的宽度为W 2，W 2的范围为0.2T至0.25T。例如，沿所述第二方向，所述第二凹槽112的高度为H 1，H 1的范围为0.2T至0.25T，所述第二方向与所述第一方向垂直的同时也与所述第四凹槽312垂直。其中，T为所述第二边缘部21的厚度，而W 2和H 2的数值是随T的变化而变化。
优选的，所述第三孔313处用以放置固定所述第二壳体20和所述第三壳体30的紧固件，从而实现所述第二壳体20和所述第三壳体30的锁紧固定，在一实施例中，所述第三孔313为圆形孔。例如，沿第三方向观察，相较于所述第三凹槽311和所述第四凹槽312，所述第三孔313更加远离所述收容空间222，使得所述第二树脂层50相较于所述第三孔313更加靠近所述电池模组60，避免水或其他液体从所述第三孔313处流入所述电池组100内部，有效地抑制其他杂质进入所述电池组100内，减少其他杂质对所述电池组100的影响。
在本实施例中，所述第三壳体30设有多个所述第三孔313，多个所述第三孔313沿所述第三边缘部31周向设置。优选的，沿Z方向观察，所述第三边缘部31大致呈长方形状，多个所述第三孔313围设成一长方形状，请结合图8，“大致呈长方形”为看起来像长方形，且其存在+/-5mm至+/-10mm的偏差。可以理解的是，在其他实施例中，若所述第三边缘部31的形状不限于此。设置多个所述第三孔313，以使得多个所述第三孔313呈环绕式的结构设于所述第三边缘部31上，以能够在多个位置同时设置紧固件，使得所述第三壳体30和所述第二壳体20的连接更加紧密。
请参阅图11，在一实施例中，所述第三边缘部31还设有第三凸部314，所述第四凹槽312相较于所述第三凸部314更加靠近所述1电池模组60。所述第三边缘部31和所述第二边缘部21之间存在第三凹部N，所述第三凹部N与所述第四凹槽312连通，所述第三凸部314位于所述第三凹部N处。在所述第三边缘部31上设置所述第三凸部314，使得所述第二壳体20和所述第三壳体30之间形成间隙，如果所述第四凹槽312内无法容纳变形后的所述第二树脂层50，则所述第二树脂层50可设于所述第三凹部N中。
如果所述第二树脂层50延伸至所述第三凹部N处，其延伸至所述第三 凹部N的部分与所述第二壳体20和所述第三壳体30之间为接触连接。
请再参阅图8，靠近所述电池模组60的部分所述第三边缘部31延伸至所述第二壳体20内。具体的，所述第三边缘部31靠近所述电池模组60的部分设有第三区部315，所述第三区部315较所述第三凹槽311靠近所述电池模组60，且所述第三区部315朝所述第二壳体20内部伸入预设距离。所述第三区部315与所述第二壳体20之间存在第四凹部P，所述第三凹槽311与所述第四凹部P连通，当所述第三凹槽311和所述第四凹槽312无法容纳所述第二树脂层50时，所述第二树脂层50可从所述第三凹槽311向所述第四凹部P处延伸，以使得所述第三壳体30和所述第二壳体20能够更好的收容所述第二树脂层50。
请参阅图8，另一所述第二边缘部21也包括第二表面211，所述第二表面211为沿第二方向与所述第三壳体30正对应的面。所述第二表面211为平面结构，且其平面度为B，优选的，B的值也为Smm，在一实施例中，沿所述第二方向，平面度B小于或等于0.3mm，在所述第二树脂层50被压缩时，所述第二树脂层50需要覆盖平面度B的公差，从而达到封闭的效果。
请参阅图10，所述第二树脂层50通过将液态树脂设于所述第三凹槽311后固定形成且所述第二树脂层50与所述第一树脂层40的结构相同，所述第二树脂层50包括第三部51和与所述第三部51连接的第四部52。与所述第一树脂层40相同，所述第二树脂层50也包括密封胶，且设置的过程与所述第一树脂层40相同。
所述第一树脂层40和所述第二树脂层50的邵氏硬度C范围为20°至35°。所述第一树脂层40和所述第二树脂层50的硬度决定了其被压缩时所需要的力的大小和被压缩后恢复原有形状的性能。经过不断的验证，所述第一树脂层40和所述第二树脂层50的硬度范围在20°至35°时，其被压缩的性能和发生形变后恢复原有的性能能有效地抑制其他杂质进入所述电池组100内，如可满足IPX7级的防水等级测试。
所述第二树脂层50位于所述第三凹槽311处时，所述第三部51与所述第三孔313相对应，且相较于所述第三孔313更靠近所述1电池模组60。优选的，沿Z方向观察，所述第二部42大致呈弧形，且沿所述第三孔313的部分边缘设置，以使得所述第二树脂层50能够绕开所述第三孔313，避免影响所述第二壳体20和所述第三壳体30的连接，且封闭性能更好。
在一实施例中，沿Y方向观察，所述第三孔313相较于所述第四部52更加靠近所述电池模组60，且所述第四部52大致呈直线状。可以理解的是，在其他实施例中，所述第四部52也可与所述第三孔313在一条直线上，即二者距离所述电池模组60的距离相同。所述第三部51和所述第四部52的形状也不限于此，如所述第三孔313为方形时，所述第三部51的形状也随之改变。
所述第二树脂层50处于压缩状态，其压缩量为所述第二树脂层50在自 然状态下长度的20％至30％。其中，所述第二树脂层50的压缩量的上限值可通过另一第二边缘部21的平面度B除以所述第二树脂层50沿所述第二方向的初始高度的方法算出，具体的，所述第二树脂层50的压缩量不超过该上限值，以进一步提升所述第二树脂层50的可靠性。
请参阅图13和图14，所述电池模组60包括多个电芯61，多个所述电芯61沿第二方向堆叠设置，所述电芯61包括电极组件611、金属部612和电芯壳体613，所述电芯壳体613设有收容腔6131，所述电极组件611收容在所述电芯壳体613的收容腔6131内，所述金属部612连接所述电极组件611并从所述电芯壳体613延伸出。所述电芯壳体613可具有绝缘层、金属层和粘接层，所述电芯壳体613通过所述粘接层粘接于所述电极组件611上，从而实现与所述电极组件611的连接。所述金属层位于所述绝缘层和所述粘接层之间，能够增强所述电芯壳体613的强度，所述绝缘层远离所述电极组件611，能够防止外部汽水渗入其内部，从而影响电芯61的使用。所述金属部612用于与外部结构连接，使得所述电芯61能够和外部结构连通。并且，相邻两所述电芯61的金属部612连接，实现多个所述电芯61之间的连通。
在一实施例中，所述金属部612为极耳，且相邻两所述电芯61之间通过极耳连接。多个所述电芯61用以给用电装置进行供电，从而使得该用电装置能够启动。
请参阅图13，在一实施例中，所述电池组100还包括多个防护件70，所述防护件70设于所述电池模组60和所述第二壳体20之间，用以保护所述电池模组60。进一步的，所述防护件70为仿形泡棉，依照所述电池模组60的外轮廓设计能够更加贴合于所述电池模组60上。当所述电池组100发生震动时，所述防护件70可以避免所述电池模组60与所述第二壳体20之间发生碰撞，从而避免所述第二壳体20对所述电池模组60造成破损，降低了所述电池模组60出现安全性问题的几率。
请再参阅图13，所述电池组100还包括固定支架80和电路板90，所述固定支架80收容于所述第二壳体20内，所述电路板90设于所述固定支架80。
所述固定支架80可通过采用螺丝紧固的方式固定于所述第二壳体20内或者通过粘接、卡固等其他方式固定于所述第二壳体20内。所述电路板90也可通过采用螺丝固定的方式固定于所述固定支架80上，或者通过粘接的方式进行固定。所述电路板90与所述电池模组60连接，从而实现对所述电池模组60的监测和控制，如控制所述电池模组60的电流、电压等。进一步地，所述电路板90与所述电芯61上的金属部612电性连接。
所述第一壳体10上还设有插接头116，所述插接头116与所述电路板90电性连接，在使用所述电池组100时，将用电装置的接头与所述插接头116接通，从而实现对该用电装置进行供电。
本申请的另一实施例还提供一种用电装置(图未示)，所述用电装置包括 本体和收容于所述本体中的电池组100，所述电池组100为上述实施例中任一所述电池组100，因而所述用电装置具有该电池组100的一切有益效果，在此，不再进行赘述。进一步的，所述用电装置可为电动车、电动公交车、电动汽车等，相应的，所述本体为车体结构，所述电池组100设于所述车体内，以进行供电。可以理解的是，在其他实施例中，所述用电装置还可是储能设备、电动自行车、飞行设备、手持电动装置，如吸尘器、除草机等其他装置。
请参阅13并结合图15，本申请的又一实施例还提供一种电池组的组装方法，包括如下步骤：
S101：将树脂注入第一壳体的第一凹槽处；
S102：于所述第一凹槽处加工所述树脂形成第一树脂层；
S103：固定电池模组于第二壳体内；
S104：将设有所述第一树脂层的第一壳体固定于所述第二壳体，所述第一树脂层位于所述第一壳体和所述第二壳体之间；
S105：通过所述第一壳体和所述第二壳体挤压所述第一树脂层，所述第一树脂层的压缩量为其在自然状态下长度的20％至30％。
在步骤S101中，采用特定的胶嘴尺寸，大致在0.5至1mm之间，且使用不同胶水粘度及出胶精度，将液态硅胶打在所述第一壳体10的第一凹槽111处。
在步骤S102中，在温度100℃至120℃下长时间火烤，使得在所述第一凹槽111和处的硅胶固定成形为第一树脂层40。
在步骤S103中，通过机械组装将电池模组60设于所述第二壳体20内，进一步地，可通过机械手抓取的方式将所述电池模组60设于所述第二壳体20内部。
在步骤S104中，将设有所述第一树脂层40的第一壳体10固定于所述第二壳体20上，所述第一树脂层40位于所述第一壳体10和所述第二壳体20之间。进一步地，所述第一壳体10和所述第二壳体20之间可通过紧固件进行连接。
在步骤S105中，当所述第一树脂层40设于所述第一壳体10和所述第二壳体20之间时，再通过紧固件将所述第一壳体10和所述第二壳体20固定后，所述第一树脂层40被所述第一壳体10和所述第二壳体20挤压，从而使得所述第一树脂层40发生变形，变形后的所述第一树脂层40的压缩量为所述第一树脂层40在自然状态下长度的20％至30％，优选的，所述第一树脂层40的压缩量为Lmm，且所述第一树脂层40的压缩量和所述第一树脂层40在自然状态下个的长度采用相同的单位进行比较。
可以理解的是，在所述电池组100包括第三壳体30时，在将所述第三壳体30与所述第二壳体20进行固定时，所述第三壳体30和所述第二壳体20之间设有第二树脂层50。
与所述第一树脂层40相同的是，在步骤S101中，同样将液态硅胶打在所述第三壳体30的第三凹槽311处。
在步骤S102中，在温度100℃至120℃下长时间火烤，使得在所述第三凹槽311处的硅胶固定成形为第二树脂层50。
在步骤S104中，将设有所述第二树脂层50的第三壳体30固定于所述第二壳体20上，所述第二树脂层50位于所述第三壳体30和所述第二壳体20之间。进一步地，所述第三壳体30和所述第二壳体20之间可通过紧固件进行连接。
在步骤S105中，当所述第二树脂层50设于所述第三壳体30和所述第二壳体20之间时，再通过紧固件将所述第三壳体30和所述第二壳体20固定后，所述第二树脂层50被所述第三壳体30和所述第二壳体20挤压，从而使得所述第二树脂层50发生变形，变形后的所述第二树脂层50的压缩量为所述第二树脂层50在自然状态下长度的20％至30％，优选的，所述第二树脂层50的压缩量为Lmm，且所述第二树脂层50的压缩量和所述第二树脂层50在自然状态下个的长度采用相同的单位进行比较。
综上所述，本申请实施例中提供电池组、用电装置及电池组的组装方法，通过所述第一壳体10和所述第二壳体20之间的第一树脂层40被压缩至其自然长度的20％至30％后，使得所述第一树脂层40能够更好的对所述第一壳体10和所述第二壳体20的连接位置进行封闭，有效地抑制其他杂质进入所述电池组100内，减少其他杂质对所述电池组100的影响。
另外，本技术领域的普通技术人员应当认识到，以上的实施例仅是用来说明本申请，而并非用作为对本申请的限定，只要在本申请的实质精神范围之内，对以上实施例所作的适当改变和变化都落在本申请公开的范围之内。

Claims (21)

  1. 一种电池组，包括电池模组、第一壳体和第二壳体，所述第一壳体和所述第二壳体形成有收容所述电池模组的收容空间，其特征在于，
    所述第一壳体包括第一边缘部，所述第一边缘部设有第一凹槽，所述第一凹槽内设有第一树脂层，所述第一树脂层与所述第一凹槽内壁粘接固定；
    所述第二壳体包括第二边缘部；
    所述第一树脂层设于所述第一壳体和所述第二壳体之间，且与所述第二边缘部连接，所述第一凹槽内的第一树脂层处于压缩状态，且压缩量为所述第一树脂层在自然状态下长度的20％至30％。
  2. 如权利要求1所述的电池组，其特征在于，所述第一树脂层与所述第二边缘部接触连接。
  3. 如权利要求1所述的电池组，其特征在于，所述第一边缘部设有与所述第一凹槽连通的第二凹槽，所述第一树脂层设于所述第二凹槽，所述第一树脂层与所述第二凹槽的内壁连接。
  4. 如权利要求3所述的电池组，其特征在于，所述第一树脂层与所述第二凹槽的内壁接触连接。
  5. 如权利要求3所述的电池组，其特征在于，所述第一凹槽较所述第二凹槽更靠近所述电池模组。
  6. 如权利要求5所述的电池组，其特征在于，所述第一边缘部设有第一凸部，所述第二凹槽较所述第一凸部更靠近所述电池模组，所述第一边缘部和所述第二边缘部之间设有与所述第二凹槽连通的第一凹部，所述第一凸部位于所述第一凹部处。
  7. 如权利要求1所述的电池组，其特征在于，所述第一树脂层通过将树脂设于所述第一凹槽后固定形成。
  8. 如权利要求1所述的电池组，其特征在于，所述第二边缘部包括与所述第一边缘部连接的第二表面，所述第二表面为平面结构，且平面度为A，所述A小于或等于0.3mm。
  9. 如权利要求5所述的电池组，其特征在于，所述电池模组包括多个堆叠的电芯，多个所述电芯堆叠的方向为第二方向，沿第一方向，所述第二边缘部的厚度为T，所述第一边缘部和所述第二边缘部沿第二方向配合连接，沿所述第二方向，所述第二凹槽的高度为H 1，H 1的范围为0.2T至0.25T，所述第二方向垂直于所述第一方向。
  10. 如权利要求9所述的电池组，其特征在于，沿所述第一方向，所述第二凹槽的宽度为W 1，W 1的范围为0.2T至0.25T。
  11. 如权利要求10所述的电池组，其特征在于，所述第二边缘部的厚度T的范围为2.5mm至3mm。
  12. 如权利要求9所述的电池组，其特征在于，所述第一壳体设有第一孔，所述第一树脂层包括第一部和第二部，所述第一部连接所述第二部，沿 第三方向观察，所述第一部较所述第一孔靠近所述电池模组，所述第三方向同时垂直于所述第一方向和所述第二方向。
  13. 如权利要求1所述的电池组，其特征在于，所述第一树脂层的邵氏硬度C为20°至35°。
  14. 如权利要求5所述的电池组，其特征在于，所述第一壳体包括连接于第一边缘部的第一区部，所述第一区部设于所述第二壳体内，且所述第一区部和所述第二壳体之间设有第二凹部，所述第一凹槽与所述第二凹部连通。
  15. 如权利要求14所述的电池组，其特征在于，所述第二凹部内设有所述第一树脂层。
  16. 如权利要求1所述的电池组，其特征在于，所述压缩量为所述第一树脂层在自然状态下长度的20％至21.4％。
  17. 如权利要求1所述的电池组，其特征在于，所述压缩量为所述第一树脂层在自然状态下长度的21.4％至25％。
  18. 如权利要求1所述的电池组，其特征在于，所述压缩量为所述第一树脂层在自然状态下长度的25％至27％。
  19. 如权利要求1所述的电池组，其特征在于，所述压缩量为所述第一树脂层在自然状态下长度的27％至30％。
  20. 一种用电装置，其特征在于，包括本体和收容于所述本体中的电池组，所述电池组为权利要求1至19中任一项所述的电池组。
  21. 一种电池组的组装方法，其特征在于，包括如下步骤：
    将树脂注入第一壳体的第一凹槽处；
    于所述第一凹槽处加工所述树脂形成第一树脂层；
    固定电池模组于第二壳体内；
    将设有所述第一树脂层的第一壳体固定于所述第二壳体，所述第一树脂层位于所述第一壳体和所述第二壳体之间；
    通过所述第一壳体和所述第二壳体挤压所述第一树脂层，所述第一树脂层的压缩量为其在自然状态下长度的20％至30％。
PCT/CN2021/074454 2021-01-29 2021-01-29 电池组、用电装置及电池组的组装方法 WO2022160267A1 (zh)

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CN107170912A (zh) * 2017-04-27 2017-09-15 天津市捷威动力工业有限公司 一种电池箱体的密封保障方法
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CN107170912A (zh) * 2017-04-27 2017-09-15 天津市捷威动力工业有限公司 一种电池箱体的密封保障方法
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