CN114744355A - Battery pack and battery pack assembling process - Google Patents

Battery pack and battery pack assembling process Download PDF

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Publication number
CN114744355A
CN114744355A CN202210444868.5A CN202210444868A CN114744355A CN 114744355 A CN114744355 A CN 114744355A CN 202210444868 A CN202210444868 A CN 202210444868A CN 114744355 A CN114744355 A CN 114744355A
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CN
China
Prior art keywords
battery pack
electric core
battery
separator
separators
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Pending
Application number
CN202210444868.5A
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Chinese (zh)
Inventor
李伶旺
程志刚
周冠宇
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Sunwoda Electric Vehicle Battery Co Ltd
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Sunwoda Electric Vehicle Battery Co Ltd
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Priority to CN202210444868.5A priority Critical patent/CN114744355A/en
Publication of CN114744355A publication Critical patent/CN114744355A/en
Pending legal-status Critical Current

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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
    • H01M50/244—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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • 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
    • H01M50/258—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
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00—Primary cells; Manufacture thereof
    • H01M6/42—Grouping of primary cells into batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The invention discloses a battery pack and a battery pack assembling process. The battery pack of the invention comprises a battery box and a battery pack. The group battery includes a plurality of electric cores and a plurality of separator, and electric core has thickness and the width of setting for, and a plurality of electric cores are arranged in proper order along thickness direction and are constituteed the electric core group, and the width direction of electric core is arranged in proper order along the multiunit electric core group. Be provided with the separator between the adjacent electric core group to and the outside of the two sets of electric core groups in the outside also is provided with the separator, and the separator is connected in electric core group. The battery box includes bottom plate and a plurality of curb plate, and the bottom plate sets up in the bottom of group battery, and the curb plate surrounds in the lateral part of group battery, and adjacent curb plate can dismantle the connection. The installation space for installing the battery pack is not required to be reserved in the battery pack like an accommodating groove in the conventional process, so that the space utilization rate of the battery pack is improved, and the energy density of the battery pack is improved. The battery pack assembling process is used for assembling the battery pack, so that the step of pre-tightening the electric core group in the conventional operation is reduced, and the assembling efficiency is improved.

Description

Battery pack and battery pack assembling process
Technical Field
The invention relates to the technical field of battery manufacturing, in particular to a battery pack and a battery pack assembling process.
Background
In the related art, a battery pack generally includes a case and a battery pack, and the battery pack is mounted in a mounting cavity of the case. The installation cavity usually needs to reserve an installation space larger than the volume of the battery pack so that the battery pack can be placed in the installation cavity. However, this method may result in a decrease in space utilization within the mounting cavity, thereby reducing the energy density of the battery pack.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a battery pack which can improve the space utilization rate in the battery pack.
The invention also provides two battery pack assembling processes for assembling the battery pack.
A battery pack according to an embodiment of the first aspect of the invention includes:
the battery pack comprises a plurality of battery cells and a plurality of separators, the battery cells are provided with set thickness and width, the battery cells are sequentially arranged along the thickness direction to form a battery core group, and the plurality of battery core groups are sequentially arranged along the width direction of the battery cells;
the separators are arranged between the adjacent electric core groups, and the separators are also arranged on the outer sides of the two groups of electric core groups which are positioned on the outermost sides along the width direction of the electric cores and are connected with the electric core groups;
the battery box comprises a bottom plate and a plurality of side plates, wherein the bottom plate is arranged at the bottom of the battery pack and used for bearing the battery pack, the side plates surround the side part of the battery pack, and the adjacent side plates are detachably connected.
The battery pack provided by the embodiment of the invention has at least the following beneficial effects: the curb plate with the bottom plate surrounds and prescribes a limit to the storage tank, and the group battery holding is in the storage tank, because for dismantling the connection between curb plate and the bottom plate, the storage tank need not to reserve the installation space who is used for installing the group battery, makes the space utilization of battery package promote, and the energy density of battery package improves.
According to some embodiments of the invention, the battery cell further comprises a plurality of connecting pipes, each connecting pipe is provided with a first channel, each partition is provided with a mounting hole and an accommodating cavity, each accommodating cavity is used for introducing a liquid medium with a set temperature to adjust the temperature of the battery cell, the mounting holes are communicated with the accommodating cavities, the connecting pipes are respectively connected to the mounting holes of the adjacent partitions, and the first channels are communicated with the accommodating cavities of the adjacent partitions.
According to some embodiments of the invention, spacers are disposed between adjacent cells in a thickness direction of the cells.
The battery pack assembling process according to the second aspect of the embodiment of the invention comprises the following steps:
assembling the electric core group: arranging a plurality of battery cores, and stacking the battery cores of a set number along the thickness direction to form a battery core group;
assembling a battery pack: arranging a plurality of separators, arranging a plurality of the electric core groups and a plurality of the separators in a mode that the separators and the electric core groups are arranged at intervals along the width direction of the electric core, connecting the separators positioned between the adjacent electric core groups to the side parts of the electric core groups at two sides, and connecting the separators positioned at the outermost side along the width direction of the electric core to the outer side part of the electric core group at the outermost side;
assembling the battery pack: the battery pack is provided with a bottom plate and a plurality of side plates, wherein the plurality of side plates surround the outer side of the battery pack, are connected to the battery pack, are connected with each other and are connected to the bottom plate.
The battery pack assembling process provided by the embodiment of the invention has at least the following beneficial effects: the battery pack assembly process comprises the steps that the battery cell groups are bonded to the separating pieces and are sequentially arranged to form the battery pack, the battery pack is connected to the bottom plate after being surrounded and fixed by the side plates, the process of pre-tightening the battery pack in the conventional assembly process is reduced, and the installation space for installing the battery pack is reserved in the accommodating groove in the conventional process, so that the space utilization rate of the battery pack is improved, and the energy density of the battery pack is improved.
According to some embodiments of the present invention, each of the cell groups has first and second opposite side portions in a width direction of the cell, each of the separators has first and second opposite side portions, and the assembling step of the search battery pack includes:
sequentially assembling the remaining electric core groups and the separators from the separator positioned at the outermost side to the other side, connecting the first side of the separator to the first side of the adjacent electric core group, and connecting the second side of the separator to the second side of the adjacent electric core group;
or, the rest of the separating members and the electric core groups are sequentially assembled from the electric core group or the separating members located at any position in the middle of the battery pack to both sides, the first side of the separating member is connected to the first side of the adjacent electric core group, and the second side of the separating member is connected to the second side of the adjacent electric core group.
According to some embodiments of the invention, the assembling of the battery pack comprises:
connecting the first side of the first said set of conductors to the first side of the first said set of separators, connecting the second side of the second said set of separators to the second side of the first said set of conductors, connecting the first side of the second said set of conductors to the first side of the second said set of separators, and repeating the above connecting steps until the first side of the nth set of conductors is connected to the first side of the nth said set of separators;
and connecting the second side surface of the (N + 1) th separator with the second side part of the (N) th electric core group to form the battery pack.
According to some embodiments of the invention, the battery pack assembling step comprises:
connecting the first side of the first said set of conductors to the first side of the first said separator, connecting the second side of the second said separator to the second side of the first said set of conductors, connecting the second side of the second said set of conductors to the second side of the first said separator, connecting the first side of the third said set of conductors to the first side of the second said separator, repeating the above connecting steps until the second side of the 2N-2 said sets of conductors is connected to the second side of the 2N-3 said separators, and the first side of the 2N-1 said sets of conductors is connected to the first side of the 2N-2 said separators;
and connecting the first side surface of the 2N-1 th separating member with the first side part of the 2N-2 nd electric core group, and connecting the second side surface of the 2N-1 th separating member with the second side part of the 2N-1 th electric core group.
According to some embodiments of the invention, the assembling of the battery pack further comprises:
the method comprises the following steps that a partition and a connecting pipe are arranged, wherein the partition is provided with an accommodating cavity and a mounting hole communicated with the accommodating cavity;
the assembling step of the battery pack further comprises the steps of connecting pipes between the adjacent separators so as to communicate the accommodating cavities of the separators, and connecting the liquid inlet assembly and the liquid outlet assembly at the two separators positioned at the outermost side.
According to some embodiments of the invention, the assembling of the battery pack further comprises:
connecting the first side part of the first electric core group with the first side surface of the first separating member, connecting one end of the first connecting pipe with the mounting hole on the first side surface of the separating member, connecting the second side surface of the second separating member with the second side part of the first electric core group, and connecting the mounting hole arranged on the second side surface of the second separating member with the other end of the first connecting pipe;
connecting a second connecting pipe to the mounting hole formed on the first side surface of the second separating member, connecting the first side part of the second electric core assembly to the first side surface of the second separating member, and repeating the connecting steps until the first side part of the nth electric core assembly is connected to the first side surface of the nth separating member and one end of the nth connecting pipe is connected to the mounting hole formed on the first side surface of the nth separating member;
and connecting the second side surface of the (N + 1) th separating member with the second side part of the (N + 1) th electric core group, and connecting the mounting hole arranged on the second side surface of the (N + 1) th separating member with the other end of the (N) th connecting pipe.
According to some embodiments of the invention, the assembling of the battery pack further comprises:
connecting the first side part of the first electric core group with the first side surface of the first separating member, connecting one end of the first connecting pipe with the mounting hole arranged on the first side surface of the separating member, connecting the second side surface of the second separating member with the second side part of the first electric core group, and connecting the mounting hole arranged on the second side surface of the second separating member with the other end of the first connecting pipe;
connecting the second side of the second set of the electric cores with the second side of the first separator and connecting one end of the second connecting pipe with the mounting hole provided on the second side of the first separator, connecting the first side of the third set of the electric cores with the first side of the second separator and connecting one end of the third connecting pipe with the mounting hole provided on the first side of the second separator, repeating the above steps until the second side of the 2N-2 th set of the electric cores is connected with the second side of the 2N-3 th separator, one end of the 2N-2 nd connecting pipe is connected with the mounting hole provided on the second side of the 2N-3 th separator, and the first side of the 2N-1 st set of the electric cores is connected with the first side of the 2N-2 nd separator, one end of the 2N-1 th connecting pipe is connected with the mounting hole arranged on the first side surface of the 2N-2 nd separator;
connecting the first side surface of the 2N-1 th separator with the first side part of the 2N-2 nd separator group and connecting the mounting hole of the first side surface of the 2N-1 st separator with the other end of the 2N-2 nd connecting pipe, connecting the second side surface of the 2N-1 nd separator with the second side part of the 2N-1 nd separator group and connecting the mounting hole of the second side surface of the 2N-2 nd separator with the other end of the 2N-1 th connecting pipe.
According to some embodiments of the invention, the step of assembling the battery cell pack includes disposing spacers between the adjacent battery cells in a stacking direction of the battery cells.
According to some embodiments of the invention, the assembling of the battery pack further comprises the steps of: and glue is distributed between the battery pack and the side plates.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention is further described with reference to the following figures and examples, in which:
FIG. 1 is a schematic view of the assembly of the electric core assembly and the separator according to the embodiment of the present invention;
fig. 2 is an assembly view of a battery pack and a separator according to an embodiment of the present invention;
FIG. 3 is a schematic view of the separator and the connecting tube according to the embodiment of the present invention;
FIG. 4 is an assembled view of a battery pack, a separator and a connecting pipe according to an embodiment of the present invention;
FIG. 5 is a schematic view of a battery pack according to an embodiment of the invention;
fig. 6 is an exploded view of a cell and a spacer in accordance with an embodiment of the present invention;
FIG. 7 is a schematic view showing the connection between the electric core assembly and the partition member according to the embodiment of the present invention;
FIG. 8 is a flow chart of a battery pack assembly process according to an embodiment of the present invention;
FIG. 9 is a schematic view showing the connection relationship between the electric core assembly and the liquid cooling pipe and the spacers according to the embodiment of the present invention;
reference numerals:
the battery pack 100, the battery cells 110, the first side portion 120 and the second side portion 130;
a spacer 200, a mounting hole 210, a first side 220, a second side 230;
a battery pack 300;
a spacer 400;
connecting pipe 500, first joint 510, first liquid-cooling pipe 520, second joint 530, second liquid-cooling pipe 540, liquid inlet assembly 550, liquid inlet pipe 551, liquid outlet assembly 560, and liquid outlet pipe 561;
battery box 600, side plate 610, bottom plate 620;
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present numbers, and the above, below, within, etc. are understood as including the present numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Referring to fig. 1 to 6, a first embodiment of the present invention provides a battery pack, which includes a battery box 600 and a battery pack 300. The battery pack 300 includes a plurality of battery cells 110 and a plurality of separators 200, the battery cells 110 have a set thickness and a set width, the battery cells 110 are sequentially arranged along the thickness direction to form the battery pack 100, and the plurality of battery pack 100 are sequentially arranged along the width direction of the battery cells 110. A separator 200 is disposed between the adjacent electric core groups 100, and a separator 200 is also disposed at the outer side of the two groups of electric core groups 100 located at the outermost side in the width direction of the electric core 110, and the separator 200 is connected to the electric core groups 100. The battery box 600 comprises a bottom plate 620 and a plurality of side plates 610, wherein the bottom plate 620 is arranged at the bottom of the battery pack 300 and used for bearing the battery pack 300, the side plates 610 surround the side parts of the battery pack 300, and the adjacent side plates 610 are detachably connected. Wherein each electric core pack 100 is connected to different sides of the two partitions 200, so that the connection stability of each electric core pack 100 is improved. And because adjacent curb plate 610 and between curb plate 610 and the bottom plate 620 for can dismantling and be connected, need not to reserve the installation space that is used for installing group battery 300 when carrying out structural design to battery box 600, make the compact structure of battery package, the space utilization of battery package promotes to make the energy density of battery package improve.
In some embodiments, the side plate 610 is connected to the bottom plate 620 through a threaded fastener, and the side plate 610 is locked to the bottom plate 620 after being combined with the battery pack 300, so that the side plate 610 and the bottom plate 620 are convenient to disassemble and assemble, and the operation difficulty of an operator is reduced.
Referring to fig. 3 and 4, in some embodiments, the battery pack further includes a plurality of connection pipes 500, each connection pipe 500 has a first channel, each separator 200 is provided with a mounting hole 210 and an accommodating cavity, each accommodating cavity is used for introducing a liquid medium with a set temperature to adjust the temperature of the battery cell 110, the first connection pipes 500 are respectively inserted into the mounting holes 210 of adjacent separators 200, and the first channels communicate with the accommodating cavities of the adjacent separators 200. The battery pack further includes a first joint 510, a second joint 530, and the connection pipe 500 includes a first liquid-cooled pipe 520 and a second liquid-cooled pipe 540. The first joint 510 is provided with a liquid outlet, one end of the first joint 510 is inserted into the mounting hole 210, and the liquid outlet is communicated with the accommodating cavity. The other end of the first joint 510 is sleeved with a first liquid cooling pipe 520, and the first liquid cooling pipe 520 is connected with the first joint 510 in a cold pressing mode. The second joint 530 is provided with a liquid inlet hole, the installation mode and the fixing mode of the second joint 530 and the first joint 510 are the same, and the liquid inlet hole is communicated with the accommodating cavity. The other end of the second joint 530 is sleeved with a second liquid cooling pipe 540, and the second joint 530 is connected with the second liquid cooling pipe 540 in a cold pressing mode. The separator 200 can be used as a liquid cooling plate without cooling the battery cell 110 by using an additional liquid cooling plate while bonding and fixing the battery cell pack 100 to form the battery pack 300, so that the space inside the battery box 600 is fully utilized, and the energy density of the battery pack is improved.
Referring to fig. 3 and 4, in some embodiments, the battery pack further includes a liquid inlet assembly 550 and a liquid outlet assembly 560, the liquid outlet assembly 560 includes a liquid outlet pipe 561, one end of the liquid outlet pipe 561 is communicated with the first liquid cooling pipe 520, and the other end of the liquid outlet pipe 561 is used for discharging the cooling liquid. The liquid inlet assembly 550 includes a liquid inlet pipe 551, one end of the liquid inlet pipe 551 is communicated with the second liquid cooling pipe 540, and the other end of the liquid inlet pipe 551 is used for flowing cooling liquid.
Specifically, the cooling liquid flows into the second liquid-cooling tube 540 along the liquid inlet tube 551, the cooling liquid flows into the accommodating cavity of the partition member 200 through the second liquid-cooling tube 540, and after the cooling liquid takes away the heat of the electric core pack 100 absorbed by the partition member 200 in the accommodating cavity, the cooling liquid flows out from the first liquid-cooling tube 520 and is discharged through the liquid outlet tube 561 to perform the next cooling cycle.
Referring to fig. 6, in some embodiments, the battery pack further includes spacers 400, and the spacers 400 are disposed between adjacent battery cells 110 along the length direction of the arrangement of the battery cells 110. Set up spacer 400 between adjacent electric core 110, spacer 400 plays the effect of keeping apart adjacent electric core 110 to spacer 400 is compressed contractibly, and spacer 400 can be in the battery package use, can absorb electric core 110 because of the inflation that reasons such as excessive charge-discharge appear, makes electric core group 100 have better range distance. The septum 400 may be made of foam or other insulating material.
Referring to fig. 8, in a second embodiment of the present invention, a battery pack assembling process is provided, including the following steps:
s100, assembling the electric core group 100: arranging a plurality of battery cells 110, and stacking a set number of battery cells 110 in the thickness direction to form a battery cell group 100;
s200, assembling the battery pack 300: arranging a plurality of separators 200, arranging a plurality of electric core groups 100 and a plurality of separators 200 in a manner that the separators 200 and the electric core groups 100 are spaced apart from each other in the width direction of the electric cells 110, and connecting each separator 200 positioned between the adjacent electric core groups 100 to the side portions of the electric core groups 100 at both sides, and connecting the separator 200 positioned at the outermost side in the width direction of the electric cells 110 to the outer side portion of the electric core group 100 at the outermost side;
s300, assembling the battery pack: a bottom plate 620 and a plurality of side plates 610 are provided, the plurality of side plates 610 are surrounded on the outside of the battery pack 300, the plurality of side plates 610 are connected to the battery pack 300, and the side plates 610 are connected to each other and to the bottom plate 620.
Referring to fig. 7, in some embodiments, each battery core pack 100 has a first side 120 and a second side 130 opposite to each other, and each separator 200 has a first side 220 and a second side 230 opposite to each other, along the width direction of the battery cells 110, and the assembling step of the battery pack 300 includes:
sequentially assembling the remaining electric core groups 100 and the separating members 200 from the separating member 200 positioned at the outermost side to the other side, connecting the first side 220 of the separating member 200 to the first side 120 of the adjacent electric core group 100, and connecting the second side 230 of the separating member 200 to the second side 130 of the adjacent electric core group 100;
through the above assembling manner, each electric core pack 100 can be sequentially connected with each separator 200 to form the battery pack 300, the assembling process is orderly and convenient, and the assembly of the battery pack 300 with the side plates 610 and the bottom plate 620 is facilitated.
Specifically, after the battery pack 300 is assembled, the battery pack is assembled with the side plates 610, that is, the plurality of side plates 610 are surrounded on the outer side of the battery pack 300, the plurality of side plates 610 are connected to the battery pack 300, the side plates 610 are connected to each other, and then the battery pack is assembled with the bottom plate 620 through a flip-chip process, that is, the battery pack 300 and the plurality of side plates 610 are integrally inverted, so that the bottom plate 620 is conveniently mounted, and the bottom plate 620 is connected to the side plates 610 and then turned over to restore the normal posture.
Specifically, in some embodiments, the assembly step of the battery pack 300 includes:
connecting the first side 120 of the first set of conductors 100 to the first side 220 of the first spacer 200, connecting the second side 230 of the second spacer 200 to the second side 130 of the first set of conductors 100, connecting the first side 120 of the second set of conductors 100 to the first side 220 of the second spacer 200, and repeating the above connecting steps until the first side 120 of the nth set of conductors 100 is connected to the first side 220 of the nth spacer 200;
connecting the second side 230 of the (N + 1) th partition member 200 with the second side 130 of the nth electric core pack 100 to form the battery pack 300;
specifically, in other embodiments, the assembly step of the battery pack 300 includes: the remaining separators 200 and the remaining sets of cores 100 are sequentially assembled to both sides from the set of cores 100 or the separators 200 located at any position in the middle of the battery pack 300, wherein the selection of the set of cores 100 at any position can select the set of cores 100 located at the center position, and then the remaining separators 200 and the sets of cores 100 are symmetrically assembled to both sides in sequence, or the selection of the set of cores 100 at any position can select the set of cores 100 at any position in the middle except the center position, and then the remaining separators 200 and the sets of cores 100 are sequentially assembled to both sides. The first side 220 of the separating member 200 is connected to the first side 120 of the neighboring electric core pack 100, and the second side 230 of the separating member 200 is connected to the second side 130 of the neighboring electric core pack 100. When the other separators 200 and the electric core assembly 100 are symmetrically assembled from the electric core assembly 100 at the central position to both sides in sequence, for example:
connecting the first side part 120 of the first electric core set 100 with the first side 220 of the first separating member 200, connecting the second side part 230 of the second separating member 200 with the second side part 130 of the first electric core set 100, connecting the second side part 130 of the second electric core set 100 with the second side part 230 of the first separating member 200, connecting the first side part 120 of the third electric core set 100 with the first side 220 of the second separating member 200, repeating the above-mentioned connecting steps until the second side part 130 of the 2N-2 electric core set 100 is connected with the second side part 230 of the 2N-3 separating member 200, and the first side part 120 of the 2N-1 electric core set 100 is connected with the first side part 220 of the 2N-2 separating member 200;
the first side 220 of the 2N-1 st spacer 200 is connected to the first side 120 of the 2N-2 nd electric core group 100, and the second side 230 of the 2N-1 st spacer 200 is connected to the second side 130 of the 2N-1 st electric core group 100 to form the battery pack 300.
Wherein, N can be any positive integer greater than 1, for example, when N is 3, the above steps are:
connecting the first side 120 of the first set of cores 100 to the first side 220 of the first spacer 200, connecting the second side 230 of the second spacer 200 to the second side 130 of the first set of cores 100, connecting the second side 130 of the second set of cores 100 to the second side 230 of the first spacer 200, connecting the first side 120 of the third set of cores 100 to the first side 220 of the second spacer 200, repeating the above connecting steps until the second side 130 of the fourth set of cores 100 is connected to the second side 230 of the third spacer 200 and the first side 120 of the fifth set of cores 100 is connected to the first side 220 of the fourth spacer 200;
the first side 220 of the fifth separator 200 is connected to the first side 120 of the fourth electric core pack 100, and the second side 230 of the sixth separator 200 is connected to the second side 130 of the fifth electric core pack 100 to form the battery pack 300.
The above-mentioned example is a specific example in which the five electric core groups 100 are symmetrically assembled with the rest electric core groups 100 from the middle electric core group 100 to both sides to form the electric battery pack 300, and can embody the assembling characteristics of the electric core groups 100 to assemble the electric battery pack 300.
The assembly of the battery pack may be such that the remaining electric core packs 100 are symmetrically assembled from the electric core pack 100 at any position in the middle except the central position to both sides in sequence until one side is assembled and then the remaining electric core packs 100 are assembled in sequence at the other side, or the assembly of the battery pack 300 may be such that the remaining electric core packs 100 are assembled from one side of the electric core pack 100 at any position in the middle except the central position in sequence until completion and then the remaining electric core packs 100 are assembled at the other side. For example, in the process of assembling the four electric core packs 100 to form the battery pack 300, the steps are as follows: the first side 120 of the first set of cores 100 is connected to the first side 220 of the first separator 200, the second side 230 of the second separator 200 is connected to the second side 130 of the first set of cores 100, the second side 130 of the second set of cores 100 is connected to the second side 230 of the first separator 200, the first side 120 of the third set of cores 100 is connected to the first side 220 of the second separator 200 until the first side 220 of the third separator 200 is connected to the first side 120 of the second set of cores, the second side 230 of the fourth separator 200 is connected to the second side 130 of the third set of cores 100, at which time the fourth set of cores 100 can be placed on one side of the first set of cores 100 in connection with the second side 230 of the third separator 200, or on one side of the third set of cores 100 in connection with the first side 220 of the fourth separator 200, and finally the fifth separator 200 is connected to the fourth set of cores 100.
Alternatively, the first side 120 of the first electric core set 100 is connected to the first side 220 of the first separating member 200, the second side 130 of the second electric core set 100 is connected to the second side 230 of the first separating member 200, and the first side 220 of the third separating member 200 is connected to the first side 120 of the third electric core set 100, and at this time, one side of the electric core set 300 is assembled, and then the other side, i.e., the second side 230 of the fourth separating member 200 is connected to the second side 130 of the first electric core set 100, the first side 120 of the fourth electric core set 100 is connected to the first side 220 of the fourth separating member 200, and finally the second side 230 of the fifth separating member 200 is connected to the second side 130 of the fourth electric core set 100.
The above-mentioned example is a concrete example in which the four electric core packs 100 are formed into the battery pack 300 by the electric core packs 100 at arbitrary positions in the middle except the center position, and can embody the assembling characteristics of the electric core packs 100 to assemble the battery pack 300.
The above steps of assembling the battery pack 300 can connect the electric core pack 100 to the partition member 200, the first side 220 and the second side 230 of the partition member 200 are coated with an adhesive layer, and the electric cells 110 in the electric core pack 100 are fixed to the partition member 200 by adhesion, so that the electric core pack 100 and the partition member 200 can be stably connected to stabilize the state of each electric core pack 100 in the whole battery pack 300. The plurality of side plates 610 surround and fix the battery pack 300 and then connect the battery pack to the bottom plate 620, so that the step of pre-tightening the battery pack 300 to be assembled in the battery box 600 in the conventional assembly process is reduced, and the installation space for installing the battery pack 300 in the conventional process does not need to be reserved, so that the space utilization rate of the battery pack is improved, and the energy density of the battery pack is improved. In addition, compared with the assembly mode of respectively assembling the electric core packs 100 in the prior art, the invention combines the plurality of electric core packs 100 and the plurality of separators 200 to form the battery pack 300 in advance and then combines the battery pack 300 with the side plate 610 and the bottom plate 620, so that the combination of the battery pack 300 and the side plate 610 is easier to adjust, and the assembly difficulty of operators is reduced.
In some embodiments, the assembling step of the battery pack 300 further includes:
a partition 200 and a connecting pipe 500 are provided, the partition 200 is provided with an accommodating cavity and a mounting hole 210 communicating with the accommodating cavity;
the assembling step of the battery pack 300 further includes connecting the connection pipe 500 between the adjacent partitions 200 to communicate the receiving cavities of the respective partitions 200, and connecting the liquid inlet assembly 550 and the liquid outlet assembly 560 at the two outermost partitions 200.
While the separators 200 are adhesively fixed to the battery pack 100 to form the battery pack 300, the liquid inlet assembly 550 and the liquid outlet assembly 560 are arranged at the two outermost separators 200 by connecting the connecting pipes 500, so that the separators can be used as liquid cooling plates without cooling the battery cells 110 by additional liquid cooling plates, thereby fully utilizing the space in the battery box 600 and improving the energy density of the battery pack.
Referring to fig. 9, further, the assembling step of the battery pack 300 further includes:
connecting the first side 120 of the first electric core pack 100 with the first side 220 of the first separating member 200, connecting one end of the first connecting pipe 500 to the mounting hole 210 of the first side 220 of the separating member 200, connecting the second side 230 of the second separating member 200 with the second side 130 of the first electric core pack 100 and connecting the mounting hole 210 provided on the second side 230 of the second separating member 200 with the other end of the first connecting pipe 500;
connecting a second connecting pipe 500 to the mounting hole 210 provided at the first side of the second separating member 200, connecting the first side part 120 of the second electric core pack 100 to the first side surface 220 of the second separating member 200, and repeating the above-mentioned connecting steps until the first side part 120 of the nth electric core pack 100 is connected to the first side surface 220 of the nth separating member 200 and one end of the nth connecting pipe 500 is connected to the mounting hole 210 provided at the first side surface 220 of the nth separating member 200;
connecting the second side of the (N + 1) th partition member 200 with the second side part 130 of the nth electric core pack 100 and connecting the mounting hole 210 provided at the second side of the (N + 1) th partition member 200 to the other end of the nth connecting pipe 500;
referring to fig. 9, in some embodiments, the assembling step of the battery pack 300 further includes:
connecting the first side 120 of the first electric core pack 100 with the first side 220 of the first separating member 200, connecting one end of the first connecting pipe 500 to the mounting hole 210 of the first side of the first separating member 200, connecting the second side 230 of the second separating member 200 with the second side 130 of the first electric core pack 100 and connecting the mounting hole 210 provided at the second side 230 of the second separating member 200 with the other end of the first connecting pipe 500;
connecting the second side 130 of the second electric core set 100 with the second side 230 of the first separating member 200 and connecting one end of the second connecting pipe 500 with the mounting hole 210 provided at the second side of the first separating member 200, connecting the first side 120 of the third electric core set 100 with the first side 220 of the second separating member 200 and connecting one end of the third connecting pipe 500 with the mounting hole 210 provided at the first side 220 of the second separating member 200, repeating the above steps until the second side 130 of the 2N-2 electric core set 100 is connected with the second side 230 of the 2N-3 separating member 200, one end of the 2N-2 connecting pipe 500 is connected with the mounting hole 210 provided at the second side 230 of the 2N-3 separating member 200, the first side 120 of the 2N-1 electric core set 100 is connected with the first side 220 of the 2N-2 separating member 200, one end of the 2N-1 th connection pipe 500 is connected to the mounting hole 210 provided at the first side 220 of the 2N-2 nd spacer 200;
the first side 220 of the 2N-1 th partition member 200 is connected to the first side 120 of the 2N-2 nd electric core pack 100 and the installation hole 210 of the first side of the 2N-1 st partition member 200 is connected to the other end of the 2N-2 nd connection pipe 500, the second side 230 of the 2N-1 th partition member 200 is connected to the second side 130 of the 2N-1 th electric core pack 100 and the installation hole 210 provided to the second side 230 of the 2N-1 th partition member 200 is connected to the other end of the 2N-1 th connection pipe 500.
Wherein, N can be any positive integer greater than 1, and specifically, the manner of assembling the electric core assembly 100 and the separating member 200 to form the battery pack 300 is the same as the manner of assembling the electric core assembly 100 and the separating member 200 to form the battery pack 300 in the foregoing, and the connection of the connection pipe 500 is the same, and can be known through the foregoing description, and will not be described herein again.
In the above embodiment, the order of the connection of the electric core pack 100 to the separator 200 and the connection of the connection pipe 500 to the separator 200 does not affect the effect of the present embodiment, and the installation of the connection pipe 500 is performed in synchronization with the connection of the separator 200 and the electric core pack 100, so that the connection pipe 500 can be directly connected between the two separators 200, and the use of the quick-connect connectors is reduced, thereby reducing the cost of the battery pack.
Referring to fig. 7, in some embodiments, during the molding process of the battery core pack 100, spacers 400 are disposed between the adjacent battery cells 110 along the length direction of the arrangement of the battery cells 110. Since the battery cells 110 in the battery cell pack 100 are fixed to the separator 200 by adhesion, the acting force between the battery cells 110 is small, and the deformation margin of the separator 400 is large, so that the battery cells 110 can be protected and insulated from each other.
In some embodiments, the battery pack assembly process further comprises the steps of: glue is applied between the battery pack 300 and the side plate 610. The structural adhesive is coated between the battery pack 300 and the side plate 610, so that the battery pack 300 and the side plate 610 can be stably connected, the battery pack 300 is prevented from moving in a battery pack, and the assembly effect of the battery pack is good.
In some embodiments, the battery pack assembly process further comprises the steps of: a cover plate (not shown) is provided and is coupled to the side plate 610 to enclose the battery case 600. The cover plate can seal the battery case 600, so that the battery pack 300 is not affected by the external environment when operating. The cover plate is connected to the side plate 610 by a screw fastener, so that the cover plate and the side plate 610 are conveniently detached, and the maintenance and replacement of the related components in the battery pack 300 and the battery box 600 are facilitated.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

Claims (12)

1. A battery pack, comprising:
the battery pack comprises a plurality of battery cells and a plurality of separators, the battery cells are provided with set thickness and width, the battery cells are sequentially arranged along the thickness direction to form a battery core group, and the plurality of battery core groups are sequentially arranged along the width direction of the battery cells;
the separators are arranged between the adjacent electric core groups, and the separators are also arranged on the outer sides of the two groups of electric core groups positioned on the outermost side along the width direction of the electric core and connected with the electric core groups;
the battery box comprises a bottom plate and a plurality of side plates, wherein the bottom plate is arranged at the bottom of the battery pack and used for bearing the battery pack, the side plates surround the side part of the battery pack, and the adjacent side plates are detachably connected.
2. The battery pack according to claim 1, further comprising a plurality of connection pipes, wherein the connection pipes have a first channel, the separators are provided with mounting holes and accommodating cavities, the accommodating cavities are used for introducing a liquid medium with a set temperature to adjust the temperature of the battery cells, the mounting holes are communicated with the accommodating cavities, the connection pipes are respectively connected to the mounting holes of the adjacent separators, and the first channels are communicated with the accommodating cavities of the adjacent separators.
3. The battery pack of claim 1, wherein spacers are disposed between adjacent cells in a thickness direction of the cells.
4. The battery pack assembly process is characterized by comprising the following steps of:
assembling the electric core group: arranging a plurality of battery cores, and stacking the battery cores of a set number along the thickness direction to form a battery core group;
assembling a battery pack: arranging a plurality of separators, arranging a plurality of the electric core groups and the separators in a manner that the separators and the electric core groups are arranged at intervals along the width direction of the electric core, connecting the separators positioned between the adjacent electric core groups to the side parts of the electric core groups at two sides, and connecting the separators positioned at the outermost side along the width direction of the electric core to the outer side part of the electric core group at the outermost side;
assembling the battery pack: the battery pack is provided with a bottom plate and a plurality of side plates, wherein the plurality of side plates surround the outer side of the battery pack, are connected to the battery pack, are connected with each other and are connected to the bottom plate.
5. The battery pack assembly process of claim 4, wherein each of the battery core packs has first and second opposite side portions in a width direction of the battery cells, and each of the separators has first and second opposite side portions, and the assembling of the battery pack includes:
sequentially assembling the remaining electric core groups and the separators from the separator positioned at the outermost side to the other side, connecting the first side of the separator to the first side of the adjacent electric core group, and connecting the second side of the separator to the second side of the adjacent electric core group;
or, the rest of the separating members and the electric core groups are sequentially assembled from the electric core group or the separating members located at any position in the middle of the battery pack to both sides, the first side surface of the separating member is connected to the first side part of the adjacent electric core group, and the second side surface of the separating member is connected to the second side part of the adjacent electric core group.
6. The battery pack assembly process of claim 5, wherein the battery pack assembling step comprises:
connecting the first side of a first said group of conductors to the first side of a first said separating member, connecting the second side of a second said separating member to the second side of a first said group of conductors, connecting the first side of a second said group of conductors to the first side of a second said separating member, and repeating the connecting steps until the first side of the nth group of conductors is connected to the first side of the nth separating member;
and connecting the second side surface of the (N + 1) th separator with the second side part of the (N) th electric core group to form the battery pack.
7. The battery pack assembly process of claim 5, wherein the battery pack assembling step comprises:
connecting the first side of the first set of conductors to the first side of the first one of said separators, the second side of the second one of said separators to the second side of the first one of said sets of conductors, the second side of the second one of said sets of conductors to the second side of the first one of said separators, the first side of the third one of said sets of conductors to the first side of the second one of said separators, and repeating the connecting steps until the second side of the 2N-2 of said sets of conductors is connected to the second side of the 2N-3 of said separators, and the first side of the 2N-1 of said sets of conductors is connected to the first side of the 2N-2 of said separators;
connecting the first side surface of the 2N-1 th separator with the first side part of the 2N-2 nd electric core group, and connecting the second side surface of the 2N-2 nd separator with the second side part of the 2N-1 st electric core group.
8. The battery pack assembly process of claim 5, wherein the battery pack assembling step further comprises:
the method comprises the following steps that a partition and a connecting pipe are arranged, wherein the partition is provided with an accommodating cavity and a mounting hole communicated with the accommodating cavity;
the assembling step of the battery pack further comprises the step of connecting the connecting pipes between the adjacent partitions so as to communicate the accommodating cavities of the partitions, and connecting the liquid inlet assembly and the liquid outlet assembly at two outermost partitions.
9. The battery pack assembly process of claim 8, wherein the battery pack assembling step further comprises:
connecting the first side part of the first electric core group with the first side surface of the first separating member, connecting one end of the first connecting pipe with the mounting hole on the first side surface of the separating member, connecting the second side surface of the second separating member with the second side part of the first electric core group, and connecting the mounting hole arranged on the second side surface of the second separating member with the other end of the first connecting pipe;
connecting a second connecting pipe to the mounting hole formed on the first side surface of the second separating member, connecting the first side part of the second electric core assembly to the first side surface of the second separating member, and repeating the connecting steps until the first side part of the nth electric core assembly is connected to the first side surface of the nth separating member and one end of the nth connecting pipe is connected to the mounting hole formed on the first side surface of the nth separating member;
and connecting the second side surface of the (N + 1) th separating member with the second side part of the (N + 1) th electric core group, and connecting the mounting hole arranged on the second side surface of the (N + 1) th separating member with the other end of the (N) th connecting pipe.
10. The battery pack assembly process of claim 8, wherein the battery pack assembling step further comprises:
connecting the first side part of the first electric core group with the first side surface of the first separating member, connecting one end of the first connecting pipe with the mounting hole arranged on the first side surface of the separating member, connecting the second side surface of the second separating member with the second side part of the first electric core group, and connecting the mounting hole arranged on the second side surface of the second separating member with the other end of the first connecting pipe;
connecting the second side of the second set of the electric cores with the second side of the first separator and connecting one end of the second connecting pipe with the mounting hole provided on the second side of the first separator, connecting the first side of the third set of the electric cores with the first side of the second separator and connecting one end of the third connecting pipe with the mounting hole provided on the first side of the second separator, repeating the above steps until the second side of the 2N-2 th set of the electric cores is connected with the second side of the 2N-3 th separator, one end of the 2N-2 nd connecting pipe is connected with the mounting hole provided on the second side of the 2N-3 th separator, and the first side of the 2N-1 st set of the electric cores is connected with the first side of the 2N-2 nd separator, one end of the 2N-1 th connecting pipe is connected with the mounting hole arranged on the first side surface of the 2N-2 nd separator;
the first side of the 2N-1 st separating part is connected with the first side of the 2N-2 nd electric core group and the mounting hole of the 2N-1 st side of the separating part is connected with the other end of the 2N-2 nd connecting pipe, the second side of the 2N-1 st separating part is connected with the second side of the 2N-1 st electric core group and the mounting hole of the 2N second side of the separating part is connected with the other end of the 2N-1 st connecting pipe.
11. The battery pack assembly process of claim 4, wherein the step of assembling the battery core pack includes disposing spacers between adjacent ones of the cells in a stacking direction of the cells.
12. The battery pack assembly process according to any one of claims 4 to 11, wherein the assembly of the battery pack further comprises the steps of: and glue is distributed between the battery pack and the side plates.
CN202210444868.5A 2022-04-24 2022-04-24 Battery pack and battery pack assembling process Pending CN114744355A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101212032A (en) * 2006-12-28 2008-07-02 三洋电机株式会社 Battery pack
CN210805855U (en) * 2019-09-30 2020-06-19 蜂巢能源科技有限公司 Battery module and battery pack
CN214957122U (en) * 2021-07-05 2021-11-30 天津市捷威动力工业有限公司 Soft-packaged electric core arrangement structure of inserted liquid cooling plate form
CN113871754A (en) * 2021-09-28 2021-12-31 蜂巢能源科技有限公司 Battery module and battery pack
CN215527866U (en) * 2021-09-27 2022-01-14 远景动力技术(江苏)有限公司 A box and battery package for electric core stack body

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101212032A (en) * 2006-12-28 2008-07-02 三洋电机株式会社 Battery pack
CN210805855U (en) * 2019-09-30 2020-06-19 蜂巢能源科技有限公司 Battery module and battery pack
CN214957122U (en) * 2021-07-05 2021-11-30 天津市捷威动力工业有限公司 Soft-packaged electric core arrangement structure of inserted liquid cooling plate form
CN215527866U (en) * 2021-09-27 2022-01-14 远景动力技术(江苏)有限公司 A box and battery package for electric core stack body
CN113871754A (en) * 2021-09-28 2021-12-31 蜂巢能源科技有限公司 Battery module and battery pack

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