CN115295966B - Series battery row, parallel battery row and battery pack - Google Patents

Series battery row, parallel battery row and battery pack Download PDF

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Publication number
CN115295966B
CN115295966B CN202211205008.2A CN202211205008A CN115295966B CN 115295966 B CN115295966 B CN 115295966B CN 202211205008 A CN202211205008 A CN 202211205008A CN 115295966 B CN115295966 B CN 115295966B
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Prior art keywords
battery
fixing piece
horizontal fixing
shell
rows
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CN202211205008.2A
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CN115295966A (en
Inventor
汪波
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Jiaxing Modu New Energy Co ltd
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Jiaxing Modu New Energy Co ltd
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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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • H01M50/51—Connection only in series
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • H01M50/512—Connection only in parallel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

The invention relates to a series battery row, a parallel battery row and a battery pack, wherein the series battery row comprises a plurality of single batteries and a connecting structure; the connecting structure comprises a horizontal fixing piece and a vertical fixing piece; the horizontal fixing piece comprises a plurality of first fixing parts which are fixedly connected with at least partial area of the top cover of each single battery; the vertical fixing piece comprises a plurality of second fixing parts which are fixedly connected to the side shell of each single battery; an electric connection block is arranged in a partial region where the vertical fixing piece is abutted with the side shell of each single battery; one side of the electric connection block is electrically connected with the side shell, and the other side of the electric connection block can be electrically connected with other series battery rows. Series connection battery row can guarantee that the battery row has great, the horizontal direction's anti-shear force through this connection structure to and the bending resistance in the vertical direction, in order to guarantee the structural stability of series connection battery row, the electric connection piece still utilizes a plurality of series connection battery rows to connect in parallel in groups simultaneously.

Description

Series battery row, parallel battery row and battery pack
Technical Field
The invention relates to the field of new energy power batteries, in particular to a series battery bank, a parallel battery bank and a battery pack.
Background
The existing technology of grouping cylindrical battery arrays into series-parallel battery packs generally adopts a customized mounting bracket, and the tops or bottoms of a plurality of single batteries in the cylindrical battery arrays are correspondingly sleeved through a plurality of holes arranged on the bracket, so that the limiting of the single batteries in the X-axis and Y-axis directions is realized; and the limit of the Z-axis direction of the single battery is realized by butting and locking the upper bracket and the lower bracket which are pressed on the top cover or the bottom of the battery shell. Because the porous and the multiple cylinders are sleeved by clearance fit, the height of the battery has tolerance, and the crimping has clearance, the structural stability in a vibration state is not ideal.
In the existing grouping technology, the series-parallel connection electric connecting pieces and the structural fastening connecting pieces among the single batteries are usually separated, and even though the metal welding and hot welding between the electric connecting pieces and the battery poles has a certain strength of structural connection function among the batteries, the structural connecting pieces, the electric connecting pieces, the structural connection rooms and the structural integration among each battery monomer are weak links of a vibration test. Vehicle gauge assembly generally requires structural integration between the three parts by integrally casting structural adhesive seals. The increase in cost and weight adversely affects both the energy density and cost of the unitized product.
Under the background of increasing the capacity and the weight of a large cylindrical monomer, particularly for a neck-free large cylindrical battery, how to reduce the clearance and keep the compaction inside a battery array, how to tightly connect an electric connector and a structural connector, even integrate the electric connector and the structural connector into a composite assembly to obtain a more stable and highly shock-resistant bulk structure, and how to reduce the weight and quickly fix the structure, which becomes a technical problem which needs to be solved urgently in the industry.
Disclosure of Invention
The invention discloses a series battery bank, a parallel battery bank and a battery pack, which are used for solving a series of problems in the prior art.
In one aspect, the present application provides a series battery bank, including a plurality of single batteries and a connection structure;
the single battery comprises a top cover, a bottom shell and a side shell, wherein the top cover is provided with a top pole, and the side shell and the bottom shell are provided with shell poles; the plurality of single batteries are sequentially and electrically connected in series;
the connecting structure comprises at least one horizontal fixing piece and at least one vertical fixing piece, and the horizontal fixing piece and the vertical fixing piece respectively comprise a sheet insulator;
the horizontal fixing piece comprises a plurality of first fixing parts which are fixedly connected to at least partial region of the top cover of each single battery, and/or the first fixing parts are fixedly connected to at least partial region of the bottom shell of each single battery;
the vertical fixing piece comprises a plurality of second fixing parts which are fixedly connected to the side shell of each single battery; the vertical fixing piece is provided with an electric connection block in a partial region where the side face shell of each single battery is abutted, the electric connection block penetrates through the vertical fixing piece, one side of the electric connection block is electrically connected with the side face shell, and the other side of the electric connection block can be electrically connected with the side face shells of the single batteries of other series battery rows.
In a second aspect, the present application provides a parallel battery bank, including a plurality of single batteries and a connection structure;
the single battery comprises a top cover, a bottom shell and a side shell, wherein the top cover is provided with a top pole, and the side shell and the bottom shell are provided with shell poles; the top pole columns of the single batteries are electrically connected in parallel;
the connecting structure comprises a horizontal fixing piece and a vertical fixing piece, and the horizontal fixing piece and the vertical fixing piece respectively comprise a sheet insulator; the horizontal fixing piece is fixedly connected to at least part of the area of the bottom shell of each single battery; the vertical fixing piece is fixedly connected to at least partial region of the side shell of each single battery;
the connecting structure comprises parallel connecting pieces; the parallel connection piece comprises an electric connection branch and a public regulation confluence channel; the public regulating confluence channel and the power connection branch are both sheet conductors;
the public adjusting confluence channel is tiled at one side of the horizontal fixing piece, which is far away from the single batteries, and a parallel battery branch formed by connecting a plurality of electric connection branches with the single batteries is formed between the public adjusting confluence channel and the side shell of each single battery; the power connection branch is arranged on one side of the vertical fixing piece opposite to the single batteries, and the side surface shells of the single batteries are electrically connected in parallel through the power connection branch;
the cross sectional area of the power connection branch is smaller than that of the public regulation confluence channel; alternatively, the first and second electrodes may be,
the current carrying capacity of the power connection branch is smaller than that of the public regulation confluence channel.
In a third aspect, the present application provides a battery pack, comprising a battery array and a connection structure;
the battery array comprises a plurality of single batteries which are arranged in the same direction, and the single batteries are arranged in rows along the transverse direction and the longitudinal direction; the single battery comprises a top cover, a side shell and a bottom shell, wherein the top cover is provided with a top pole, and the side shell and the bottom shell are provided with shell poles;
the connecting structure comprises a first horizontal fixing piece, a first vertical fixing piece and a second horizontal fixing piece which all comprise sheet insulators;
the first horizontal fixing piece is horizontally laid between the adjacent transverse battery rows along the extending direction of the transverse battery rows, and the first horizontal fixing piece is fixedly connected with the top cover of each single battery in the adjacent transverse battery rows;
the first vertical fixing piece is vertically arranged between the adjacent transverse battery rows along the extending direction of the transverse battery rows and is fixedly connected with the side casing part of each single battery in the adjacent transverse battery rows in a regional mode;
the first horizontal fixing piece is abutted and fixed with the first vertical fixing piece or is of an integrated structure;
an electric connection block is arranged in a partial region where the first vertical fixing piece is abutted with the side shell of each single battery in the transverse battery row, and penetrates through the first vertical fixing piece; two sides of the electric connection block are respectively and electrically connected with the side shell bodies adjacent to the two sides;
the second horizontal fixing piece is horizontally laid between the adjacent transverse battery rows along the extending direction of the transverse battery rows and is fixedly connected with the bottom shell of each single battery in the adjacent transverse battery rows;
or the second horizontal fixing pieces are horizontally laid between the adjacent longitudinal battery rows along the extending direction of the longitudinal battery rows, and the second horizontal fixing pieces are fixedly connected with the bottom shell of each single battery in the adjacent longitudinal battery rows.
Compared with the prior art, the technical scheme adopted by the invention can achieve the following beneficial effects:
firstly, the series battery row provided by the application comprises a connecting structure, wherein the connecting structure comprises a horizontal fixing piece and a vertical fixing piece, the horizontal fixing piece and the vertical fixing piece are both in a sheet shape and can be fixedly connected with each other or integrally formed, and the cross section of the combined horizontal fixing piece and the combined vertical fixing piece is L-shaped or T-shaped and can be fixedly connected to the top/bottom and the side part of the battery row; the horizontal fixing pieces are tiled and can be bonded to the top or the bottom of the battery row through structural adhesive, on one hand, larger horizontal shearing resistance force can be provided, and stripping resistance force provided by metal fusion fixation in the prior art can be replaced, so that the structure of the battery row is firmer; on the other hand, after pressurization, the series battery rows can be subjected to pressure maintaining through the horizontal fixing piece, so that the diameter tolerance among different single batteries is reduced to the maximum extent, the same resistance of the electric connection points in the rows is ensured, and balanced grouping in the later period is facilitated; the vertical fixing piece can be abutted to the side shell of each single battery in the battery row, and can provide bending resistance in the vertical direction for the battery row. Further, the connecting structure is also provided with an electric connecting block, and when a plurality of series battery rows are connected in parallel to form a group, the adjacent series battery rows can be directly electrically connected in parallel through the electric connecting block.
Secondly, the application also provides a parallel battery bank, the parallel battery bank also has a connecting structure, further, a parallel connecting piece is arranged in the connecting structure, the parallel connecting piece is provided with a plurality of electric connecting branches and a public adjusting confluence channel, two ends of each electric connecting branch are respectively used for being electrically connected with a shell pole of a single battery and the public adjusting confluence channel, the shell poles of different single batteries are connected in parallel through the public adjusting confluence channel and the electric connecting branches, and further, the current carrying capacity of each electric connecting branch is smaller than that of the public adjusting confluence channel; the parallel connection structure is applied to parallel battery rows, when one battery is out of control due to heat, the internal resistance of the battery is reduced, the current inside the battery is increased, the incremental current of other normal batteries in the parallel battery rows reaches the exclusive power connection branch of the out of control due to heat through the public regulation confluence channel, the power connection branch collects the incremental current transmitted by multiple paths of normal batteries so as to exceed the limit current carrying capacity of the battery, the battery can be fused and burnt out due to overcurrent quickly, the current on the exclusive power connection branch of the normal batteries can work normally when the current does not reach the current carrying limit, and the battery which is out of control due to heat is electrically isolated from the parallel battery rows. And after the isolation, the current on the power connection branch of other normal batteries is recovered to a normal state.
Finally, the application also provides a battery pack which is composed of the parallel battery rows and/or the series battery rows, wherein the connecting structure in the battery pack is arranged in parallel with the series battery rows at the top, so that larger anti-shearing force can be provided for the series battery rows, the same resistance of electrical connection points in the rows is ensured, and balanced grouping is facilitated; the extending directions of the horizontal fixing pieces and the vertical fixing pieces at the bottom are preferably vertically staggered; more preferably, a vertical fixing member parallel to the extending direction of the horizontal fixing member at the bottom is further arranged between the horizontal fixing member and the vertical fixing member at the bottom to form a three-dimensional # -shaped structure, so that the connection stability of the whole battery pack structure is ensured. Furthermore, the connecting structure is also provided with a parallel connecting piece or an electric connecting block, so that parallel connection between the battery rows connected in series can be realized, or early isolation of the thermal runaway single batteries in the parallel battery rows can be realized, and the influence on the work of other normal batteries in the battery pack is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below to form a part of the present invention, and the exemplary embodiments and the description thereof illustrate the present invention and do not constitute a limitation of the present invention. In the drawings:
fig. 1 is a schematic structural view of a battery row connected in series in a preferred embodiment disclosed in example 1 of the present invention;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is a top view of FIG. 1;
fig. 4 is a schematic structural view of a series battery row in another preferred embodiment disclosed in embodiment 1 of the present invention;
FIG. 5 is a left side view of FIG. 4;
fig. 6 is a schematic structural view of a series battery row in another preferred embodiment disclosed in example 1 of the present invention;
fig. 7 is a top view of a row of series connected cells in another preferred embodiment disclosed in example 1 of the present invention;
fig. 8 is a schematic structural view of a battery row connected in series in another preferred embodiment disclosed in example 1 of the present invention;
FIG. 9 is a top view of FIG. 8;
fig. 10 is a schematic structural view of a parallel battery row in a preferred embodiment disclosed in example 2 of the present invention;
FIG. 11 is a top view of FIG. 10;
FIG. 12 is a left side view of FIG. 10;
fig. 13 is a schematic top view of a battery pack according to a preferred embodiment of the present invention, as disclosed in example 3;
fig. 14 is a schematic bottom view of a battery pack according to a preferred embodiment of the present invention disclosed in example 3;
fig. 15 is a schematic structural view of a battery pack in a preferred embodiment disclosed in example 3 of the present invention;
fig. 16 is a schematic structural view of a battery pack in a preferred embodiment disclosed in example 3 of the present invention;
fig. 17 is a schematic structural view of a battery pack in a preferred embodiment disclosed in example 3 of the present invention;
FIG. 18 is a front view of FIG. 17;
fig. 19 is a schematic structural view of a battery pack in a preferred embodiment disclosed in example 3 of the present invention.
Description of reference numerals:
the battery cell 100, the top cover 110, the top pole 120, the side housing 130, and the bottom housing 140;
the horizontal fixing part comprises a horizontal fixing part 200, a first fixing part 201, a glue injection hole 202, a first horizontal fixing part 210 and a second horizontal fixing part 220;
a vertical fixture 300, a first vertical fixture 310, a middle vertical fixture 320, a second vertical fixture 330;
peripheral mount 400, bolt 410;
the bus bar 500, the extension part 510, the bending part 520, the first insulation block 600, the second insulation block 700;
the electric connection block 800, the parallel connection piece 900, the electric connection branch 910 and the common adjusting and converging channel 920.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. In the description of the present invention, it is noted that the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.
It is to be understood that the disclosed embodiments are merely exemplary of the invention, and are not intended to be exhaustive or exhaustive. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Example 1
Referring to fig. 1 to 9, embodiment 1 provides a serial battery row, which includes a plurality of single batteries 100, a bus bar 500, and a connection structure, wherein the plurality of single batteries 100 are electrically connected in series through the bus bar 500, and a stable structural connection is achieved through the connection structure. In the present embodiment, "battery row" and "battery row in series" both refer to battery rows that have been electrically connected in series.
In a preferred embodiment, the unit cell 100 includes a cylindrical unit cell, particularly a cylindrical unit cell without a neck portion; the cylindrical unit cell may be selected from, but not limited to, 18650 cells, 21700 cells, 46800 cells, and the like. Preferably, the single battery 100 includes a top cover 110, a bottom case 140 and a side case 130, wherein the top case 110 has a top terminal post 120 at a central position thereof, and the side case 130 and the bottom case 140 have case terminal posts; it will be understood by those skilled in the art that the top terminal post 120 and the housing terminal post are two polarity terminal posts of the unit battery 100, respectively.
1-3, in a preferred embodiment, the buss bar 500 is a sheet buss bar; the bus bar 500 includes an extension portion 510 and a bending portion 520, one end of the extension portion 510 is electrically connected to the top terminal post 120 of a single battery 100 through a conductive adhesive, and the other end of the extension portion 510 extends radially outward and downward to the outside of the side casing 130 of the single battery 100; the bending part 520 is bent downwards by approximately 90 degrees, one end of the bending part 520 is electrically connected to the other end of the extending part 510, and the other end of the bending part 520 extends to one side of the side casing 130 adjacent to the adjacent single battery 100 and is abutted against and electrically connected with the side casing 130; in a preferred embodiment, the bending part 520 and the extending part 510 may be integrally formed.
As shown in fig. 8, preferably, a first insulating block 600 is disposed between the extension portion 510 and the top cover 110 of the electrically connected single battery 100, and a second insulating block 700 is disposed between the bending portion 520 and the side casing 130 of the single battery 100; in some preferred embodiments, the first insulation block 600 and the second insulation block 700 may be a unitary structure.
Preferably, the plurality of unit batteries 100 are arranged in the same direction by the plurality of bus bars 500 to form a series electrical connection structure; more preferably, the electrical connection is fixed by a conductive adhesive.
As shown in fig. 1 to 3, in a preferred embodiment, the connection structure includes at least one horizontal fixing member 200 and at least one vertical fixing member 300, and the horizontal fixing member 200 and the vertical fixing member 300 are both sheet-shaped insulators, and preferably, the length directions of the horizontal fixing member 200 and the vertical fixing member 300 are both parallel to the extending direction of the battery rows.
In a preferred embodiment, the horizontal fixing member 200 is flatly arranged on the top or bottom of each unit battery 100 in the battery row for horizontally limiting the unit batteries 100 and providing a large shearing resistance.
Preferably, the horizontal fixing member 200 includes a plurality of first fixing portions 201, and the first fixing portions 201 extend to both sides or one side perpendicular to the length direction of the horizontal fixing member 200; each of the first fixing parts 201 corresponds to one unit cell 100 and can be adhered to at least a partial region of the top cover 110 or the bottom case 140 of each unit cell 100 by UV structural adhesive.
In a preferred embodiment, the first fixing portion 201 has a shape matching at least a partial region of the top cover 110 or the bottom case 140 of each unit battery 100 in the battery row, in order to provide the battery row with greater horizontal shear resistance; preferably, the first fixing portion 201 may be provided in a substantially semicircular shape, as shown in fig. 8 to 9; the first fixing portion 201 may also be rectangular, rectangular with rounded corners, semi-elliptical or other shapes; it will be understood by those skilled in the art that the first fixing portion 201 is provided to increase the contact area between the horizontal fixing member 200 and the top cover 110 of the unit cell 100, and thus any shape capable of increasing the contact area may be applied to the preferred embodiment, which is not listed here.
In a preferred embodiment, the vertical fixing member 300 is vertically disposed along the extending direction of the battery row, and can be attached to the side portion of the battery row for limiting the battery row in the vertical direction, and providing a large bending resistance.
Preferably, the vertical fixing member 300 includes a plurality of second fixing parts, each of which corresponds to the side case 130 of one unit cell 100 and is capable of adhering to at least a partial region of the side case 130 of each unit cell 100 by UV structural adhesive.
In a preferred embodiment, the connection structure is provided above the battery row, and the lower side surface of the horizontal fixing member 200 abuts against the upper end surface of the vertical fixing member 300.
In another preferred embodiment, the connection structure is disposed above the battery row, and the horizontal holder 200 and the vertical holder 300 are an integrated structure.
Referring to fig. 4 and 5, the cross section of the connection structure is preferably L-shaped or T-shaped; it will be understood by those skilled in the art that the ultimate purpose of the battery rows in series is to form a battery pack, when the battery rows are at the edge of the battery pack, two connection structures are provided above the battery rows, and one of the connection structures is L-shaped in cross section, i.e., at the edge of the battery pack; the other connecting structure is T-shaped in cross section and is adapted to connect to an adjacent battery row structure.
As shown in fig. 6 and 7, preferably, when the battery row provided with the connection structure is positioned in the battery pack, the cross sections of the two connection structures above the battery row are both T-shaped for connection with the structure between the adjacent battery rows in the battery pack.
In a preferred embodiment, the connection structure is provided below the battery row, and the upper side surface of the horizontal fixture 200 abuts against the lower end surface of the vertical fixture 300.
In another preferred embodiment, the connection structure is disposed below the battery row, and the horizontal holder 200 and the vertical holder 300 are an integrated structure.
It will be understood by those skilled in the art that when the connecting structure is disposed below the battery rows, the cross-sections of the connecting structure of the battery rows at the edge are L-shaped one and T-shaped the other after the battery rows are grouped; and the cross sections of the two connecting structures below the battery rows are both T-shaped and are used for being connected with the structures between the adjacent battery rows in the battery pack.
As shown in fig. 6, preferably, an electrical connection block 800 is disposed in a partial region where the vertical fixing member 300 abuts against the side casing 130 of each unit battery 100, two ends of the electrical connection block 800 penetrate through two sides of the vertical fixing member 300, one end of each electrical connection block 800 is electrically connected to the corresponding side casing 130 of the unit battery 100, and the other end is electrically connected to the side casing 130 of a unit battery 100 of the adjacent battery row in series.
In a preferred embodiment, the electrical connection blocks 800 are disposed in the second fixing portion, and the number of the electrical connection blocks 800 is the same as that of the second fixing portion; in a preferred embodiment, the electrical connection block 800 may be provided as one electrical contact and electrically connected to the side case 130 of the adjacent unit battery 100 through a conductive adhesive.
Preferably, the connection structure is made of a transparent insulating material with certain elasticity, so that when the connection structure is connected with the battery row, a UV structural adhesive can be applied to the connection part, and ultraviolet rays are used for curing; further, at least two glue injection holes 202 vertically penetrating through are formed in the outer edge of the first fixing portion 201, as shown in fig. 7, more preferably, the two glue injection holes 202 are symmetrically distributed with respect to the second fixing portion, that is, the two glue injection holes 202 are respectively disposed on two sides of a straight line passing through the center of the top cover 110 and perpendicular to the row direction of the transverse batteries; when the UV structural adhesive is used for connecting the battery rows and the connecting structure, the UV structural adhesive is also arranged in the adhesive injection hole 202 to form a vertical adhesive column, the adhesive column can be simultaneously connected with the horizontal fixing piece 200, the vertical fixing piece 300 and the single batteries 100, so that a vertical shearing resistance force can be provided, and the displacement of the single batteries 100 in the battery rows in the vertical direction is more effectively limited in combination with a bending resistance force provided by the vertical fixing piece 300; the two glue columns can respectively provide anti-shearing force with the side shell 130 of the single battery 100, and further limit the Z-axis displacement of the horizontal fixing piece 200 and the single battery 100; since the shearing resistance of the gluing process is much greater than the peeling resistance, the locking force between the connection joint and the unit battery 100 can be greatly strengthened.
It should be understood by those skilled in the art that when the UV structural adhesive is used to insulate and connect the connection structure and the single battery 100, the electrical connection point should be avoided, poor contact at the electrical connection block 800 is avoided, and the electrical connection between the electrical connection block 800 and the side case 130 is achieved through the conductive adhesive.
Further, the UV structural adhesive can slightly collapse at the outer side of the top of the adhesive injection hole 202, a rubber cap is formed after curing, the shape of the rubber cap is in a nail head shape, the whole rubber column is in a rubber nail structure, and the position of a nail body is the rubber column; preferably, the upper surface of the rubber cap is slightly higher than the upper surface of the horizontal fixing member 200, the lower surface of the rubber cap abuts against the lower surface of the horizontal fixing member 200, and the diameter of the cross section of the rubber cap is larger than that of the glue injection hole 202, so as to further strengthen the locking force; therefore, the glue column and the side case 130 of the unit battery 100 have not only a shearing force but also a peeling force, and the peeling force between the horizontal fixing member 200 and the top of the unit battery 100 is strengthened by the pressing of the glue cap, so that the glue column and the side case are more stable.
In this embodiment, the connection structure can be fixedly connected to the top/bottom and the side of the serial battery row, so as to provide a larger horizontal shear resistance and a vertical buckling resistance for the serial battery row, thereby ensuring the structural stability of the serial battery row; more preferably, when the connection structure in this embodiment is used for series-connected cell rows, the pressurized cell rows can be subjected to pressure holding, which is favorable for later equalization grouping.
On the other hand, the connecting structure is also provided with an electric connecting block 800, which is beneficial to the parallel connection and grouping of a plurality of battery rows connected in series.
Example 2
Referring to fig. 10 to 12, the present embodiment provides a parallel battery row, which includes a plurality of single batteries 100 and a connection structure, wherein the plurality of single batteries 100 are electrically and structurally connected through the connection structure. In the present embodiment, "battery row" and "parallel battery row" both refer to battery rows that have been electrically connected in parallel.
Preferably, in the present embodiment, the unit cell 100 includes a cylindrical unit cell 100, particularly, a cylindrical unit cell 100 without a neck portion; in a preferred embodiment, the battery cell 100 includes a top cover 110, a bottom housing 140, and a side housing 130, with the top terminal post 120 in a central location of the top cover 110, and the housing terminal posts in the side housing 130 and the bottom housing 140. Preferably, the top terminals 120 between the adjacent unit batteries 100 within the battery row are electrically connected in parallel.
In a preferred embodiment, the connection structure includes a horizontal fixing member 200 and a vertical fixing member 300, both of which are made of transparent insulating materials with certain elasticity, and the connection structure is fixedly connected to the unit cell 100 (except for electrical connection sites) by UV structural adhesive and is cured using ultraviolet light.
Preferably, the horizontal fixing member 200 is provided with a first fixing portion 201, and the vertical fixing member 300 is provided with a second fixing portion, and the first fixing portion 201 and the second fixing portion can be directly abutted and fixed with the case of the unit battery 100.
Alternatively, the connection structure may be provided at the top or bottom of the parallel battery rows.
In a preferred embodiment, the connecting structure is provided at the top of the parallel battery rows, when: the first fixing portion 201 of the horizontal fixing member 200 is connected to the top cover 110 of each unit cell 100 in the cell row in an insulating manner, and the first fixing portion 201 has a shape matched with at least a partial region of the top cover 110 for providing a larger contact area so as to improve the shearing resistance of the horizontal fixing member 200 in the horizontal direction (x-axis, y-axis); the second fixing portion of the vertical fixing member 300 is connected to the side case 130 of each unit battery 100 in the battery row in an insulated manner, and has a shape matched with at least a partial region of the side case 130, so as to improve the bending resistance of the vertical fixing member 300 in the vertical direction (z-axis).
Alternatively, the lower side of the horizontal fixing member 200 abuts the upper end of the vertical fixing member 300; alternatively, the horizontal fixture 200 and the vertical fixture 300 are of an integrated structure.
Preferably, the cross-section of the connecting structure is L-shaped or T-shaped; as will be understood by those skilled in the art, when the parallel battery row is finally located at the edge of the battery pack, two connecting structures are arranged above the parallel battery row, and the cross section of one connecting structure is L-shaped, namely, the connecting structure is located at the edge of the battery pack; the other connection structure is T-shaped in cross section and is used for connecting with adjacent parallel battery row structures in the battery pack.
Preferably, when the parallel battery rows are located in the battery pack, the cross-sections of both connection structures above the battery rows are T-shaped for connection with structures between adjacent parallel battery rows in the battery pack. In another preferred embodiment, the connection structure is provided at the bottom of the parallel battery row, in which case the horizontal fixing member 200 is insulatedly connected to at least a partial region of the bottom case 140 of each unit battery 100 in the battery row, and the vertical fixing member 300 is insulatedly connected to at least a partial region of the side case 130 of each unit battery 100 in the battery row.
Preferably, the cross section of the connecting structure at the bottom of the parallel battery row is T-shaped or L-shaped, and specific arrangement may refer to an embodiment when the connecting structure is arranged at the top of the battery row, which is not described herein again. Preferably, the horizontal fixing member 200 is further provided with a glue injection hole 202, and for the specific arrangement, reference is made to embodiment 1, which is not described herein again.
As shown in fig. 10-12, in a preferred embodiment, the connection structure further includes a parallel connection member 900, the parallel connection member 900 includes a common regulating bus channel 920 and a plurality of electrical branches 910, both of which are conductors, and the number of the electrical branches 910 is the same as the number of the single batteries 100 in the parallel battery row; each power connection branch 910 is provided with a first end and a second end, the first end is used for electrically connecting with the housing pole of each battery cell 100, the second end is used for electrically connecting with the common adjusting and collecting channel 920, and the side housings 130 of the adjacent battery cells 100 are connected in parallel through the common adjusting and collecting channel 920 and the power connection branch 910. Preferably, the other parts of the power connection branch 910 except the first end and the common regulating bus channel 920 are insulated from the unit batteries 100.
In a preferred embodiment, the parallel connection member 900 is formed by stamping or cutting a metal bus bar 500 with the same thickness, the common adjusting bus channel 920 is flatly laid on one side of the horizontal fixing member 200 away from the single battery 100, the plurality of electrical connection branches 910 are fixed on one side of the vertical fixing member 300 opposite to the single battery 100, and the other ends of the electrical connection branches 910 penetrate through the horizontal fixing member 200 and are integrally formed with the common adjusting bus channel 920. Preferably, the common regulating bus passage 920 and the horizontal fixing member 200 are equal in width.
In some preferred embodiments, the cross-sectional area of the common adjusting bus channel 920 is larger than the cross-sectional area of the electrical branch 910, that is, the width of the common adjusting bus channel 920 is larger than the width of the electrical branch 910, so as to ensure that the current carrying capacity of the common adjusting bus channel 920 is larger than the current carrying capacity of the electrical branch 910. Preferably, the first end of the power connection branch 910 is electrically connected to the side surface housing 130 of the single battery 100 by a cold-welding and gluing process of filler of a normal temperature cured conductive adhesive, so as to prevent external heat from affecting the internal quality of the single battery 100 through a battery post. Preferably, the resistances of the plurality of power branches 910 are the same.
Preferably, the current carrying capacity of the common regulating bus duct 920 is equal to or greater than the sum of the current carrying capacities of n-1 power receiving branches 910, where n is the number of the single batteries 100 in the parallel battery row. When one single battery 100 of the n single batteries 100 is in thermal runaway, the phenomenon is internal short circuit, and then the other n-1 single batteries 100 connected in parallel and working normally transmit respective transverse incremental currents to the thermal runaway battery through the respective power connection branches 910 and the common bus regulation channel. The maximum current increment on the common bus regulation channel is the sum of the incremental currents on the electrical branch 910 to which n-1 normal working batteries are electrically connected. In order to ensure that the power connection branch 910 and the common regulation bus channel 920 electrically connected to each normal operating battery are not fused by overcurrent or can still maintain a normal electrical operating state and a thermal state due to overcurrent heating, the current carrying capacity of the common regulation bus channel 920 is at least the sum of the current carrying capacities of the n-1 power connection branches 910.
In this embodiment, the connection structure can be fixedly connected to the top/bottom and the side of the parallel battery row, so as to provide a larger horizontal shear resistance and a vertical buckling resistance for the parallel battery row, thereby ensuring the structural stability of the parallel battery row.
On the other hand, a parallel connection piece 900 is further arranged in the connection structure, the parallel connection piece 900 is provided with a plurality of power connection branches 910 and a common adjusting and converging channel 920, two ends of each power connection branch 910 are respectively used for being electrically connected with the shell pole of the single battery 100 and the common adjusting and converging channel 920, the shell pole of different single batteries 100 is connected in parallel through the common adjusting and converging channel 920 and the power connection branches 910, and further, the current carrying capacity of each power connection branch 910 is smaller than that of the common adjusting and converging channel 920; the parallel connection structure is applied to parallel battery banks, when one battery is out of control due to heat, the internal resistance of the battery is reduced, the current inside the battery is increased, the incremental current of other normal batteries in the parallel battery banks reaches the special power connection branch 910 of the out of control due to heat through the public regulation confluence channel 920, the power connection branch 910 collects the incremental current transmitted by multiple paths of normal batteries so as to exceed the limit current carrying capacity of the battery, the battery can be fused and burned out due to overcurrent quickly, the current on the special power connection branch 910 of the normal batteries can work normally when the current on the special power connection branch 910 of the normal batteries does not reach the current carrying limit, and the battery which is out of control due to heat is electrically isolated from the parallel battery banks. After the isolation, the current on the power branch 910 of other normal batteries is restored to the normal state.
Example 3
Referring to fig. 13 to 19, the present embodiment provides a battery pack including a battery array composed of unit batteries 100 and a connection structure, and features regarding the connection structure, which have been included in embodiments 1 and 2, are naturally inherited in the present embodiment.
Preferably, the battery array is a gapless fit structure, and comprises a plurality of unit batteries 100 arranged in the same direction, wherein the plurality of unit batteries 100 are arranged in rows along the transverse direction and the longitudinal direction; the unit cell 100 includes a cylindrical unit cell 100, and particularly, a cylindrical unit cell 100 without a neck portion. Preferably, the single battery 100 includes a top cover 110, a bottom case 140 and a side case 130, wherein the top cover 110 has a protruded top terminal post 120 at the center thereof, and the side case 130 and the bottom case 140 have case terminal posts; it will be understood by those skilled in the art that the top terminal post 120 and the housing terminal post are two polarity terminal posts of the unit cell 100, respectively.
In a preferred embodiment, the transverse cell rows in the cell array are in the direction of the series electrical connection, i.e. the transverse cell rows are the series cell rows.
As shown in fig. 13-15, preferably, the top terminal post 120 of each single battery 100 is electrically connected to a sheet-shaped bus bar 500, the bus bar 500 includes an extending portion 510 and a bending portion 520, one end of the extending portion 510 is electrically connected to the top terminal post 120 of a single battery 100 through a conductive adhesive, and the other end of the extending portion 510 extends radially outward and downward to the outside of the side casing 130 of the single battery 100; one end of the bending part 520 is electrically connected to the other end of the extending part 510, and the other end of the bending part 520 extends to one side of the side casing 130 close to the adjacent single battery 100 and is connected to the side casing in an abutting manner; in a preferred embodiment, the bending part 520 and the extending part 510 may be integrally formed.
Preferably, the plurality of unit batteries 100 are arranged in the same direction by the plurality of bus bars 500 to form a series electrical connection structure; more preferably, the electrical connection is fixed by a conductive adhesive. Preferably, a plurality of transverse series-connected battery rows with equal length are longitudinally arranged in parallel to form the battery array.
Preferably, a first insulating block 600 is disposed between the extension portion 510 and the top cover 110 of the electrically connected unit cell 100, a second insulating block 700 is disposed between the bending portion 520 and the side casing 130 of the unit cell 100, and a lower end of the second insulating block 700 is preferably lower than a lower end of the bending portion 520; in some preferred embodiments, the first insulation block 600 and the second insulation block 700 may be a unitary structure, as shown in fig. 16 to 18. Preferably, the first insulating block 600 is as high as the top pole 120; one side of the second insulating block 700 has a contour matching the side case 130 of the unit battery 100; in a preferred embodiment, the second insulating blocks 700 in adjacent series-connected battery rows may be of an integrated structure to increase the bending resistance of the battery array in the vertical direction.
Preferably, a first horizontal fixing member 210 and a first vertical fixing member 310 are arranged at the top of each row of series-connected battery rows, and both are fixedly connected with the series-connected battery rows through UV structural adhesive; preferably, the first horizontal fixing members 210 are tiled along the series connection direction and disposed on at least a partial region of the top cover 110 of each single battery 100 in the row, and preferably, the shape of the region where the first horizontal fixing members 210 abut against each top cover 110 is at least partially matched; the first vertical fixing member 310 is vertically disposed at least in a partial region of the side case 130 of each unit cell 100 in the row in the same direction as the first horizontal fixing member 210.
As will be understood by those skilled in the art, since the first horizontal fixing member 210 and the first vertical fixing member 310 are in the same series connection direction, the pressurized series-connected battery row can be subjected to pressure maintaining, so as to reduce the diameter tolerance between different single batteries 100 to the maximum extent, ensure that the electrical connection points in the row have the same resistance, and facilitate balanced grouping.
Preferably, the first horizontal fixing member 210 is integrally formed with the first vertical fixing member 310; preferably, the cross sections of the first horizontal fixing member 210 and the first vertical fixing member 310 disposed at the edge of the battery pack are L-shaped, and at this time, only one row of series-connected battery rows is fixed by the first horizontal fixing member 210 and the first vertical fixing member 310; the first horizontal fixing member 210 and the first vertical fixing member 310 in the battery array are arranged, and the cross sections of the first horizontal fixing member 210 and the first vertical fixing member 310 are T-shaped, so that the first horizontal fixing member 210 and the first vertical fixing member 310 simultaneously fix the series-connected battery rows on both sides thereof.
In a preferred embodiment, an electrical connection block 800 is disposed in a partial region where the first vertical fixing member 310 abuts against the side casing 130 of each single battery 100, two ends of the electrical connection block 800 penetrate through two sides of the vertical fixing member 300, one end of each electrical connection block 800 is electrically connected to the corresponding side casing 130 of the single battery 100, and the other end is electrically connected to the side casing 130 of a single battery 100 of a series battery row adjacent to the electrical connection block.
In a preferred embodiment, the number of electrical connection blocks 800 is the same as the number of cells 100 in the series-connected battery row; in a preferred embodiment, the electrical connection block 800 may be provided as one electrical contact and electrically connected to the side cases 130 of the unit batteries 100 adjacent to both sides by a conductive adhesive.
In a preferred embodiment, the second horizontal fixing member 220 is flatly arranged at least in a partial region of the bottom of the transverse cell row, and the middle vertical fixing member 320 is vertically arranged at least in a partial region of the side of the longitudinal cell row; in another preferred embodiment, the second horizontal fixing member 220 is flatly disposed at least in a partial region of the bottom of the longitudinal cell row, and the middle vertical fixing member 320 is vertically disposed at least in a partial region of the side of the lateral cell row; whether the second horizontal fixing member 220 is laid flat in the direction of the transverse battery rows or the longitudinal battery columns, the region where it abuts against the bottom case 140 of each unit battery 100 in the row/column is at least partially matched in shape, and the region is adhered to the bottom case 140 of the unit battery 100 by UV structural adhesive.
Preferably, a plurality of adjacent second horizontal fixing members 220 are abutted and fixedly connected or integrally formed to form a bottom integral horizontal fixing member; the bottom integral horizontal fixture can be fixedly attached to the bottom housing 140 of each cell 100 in the battery array.
Preferably, the first insulating block 600 has the same height as the top electrode post 120, and the thickness of the second insulating block 700 at the connection line position of the centers of circles of the transversely adjacent single batteries 100 plus the thickness of the bending part 520 is the same as the thickness of the middle vertical fixing piece 320 arranged along the extending direction of the longitudinal battery row.
Preferably, the middle vertical fixing member 320 is not necessarily disposed at the middle of the unit battery 100, and the upper end surface thereof may abut against the first vertical fixing member 310, and the lower end surface thereof may abut against the second horizontal fixing member 220, or may be disposed at other heights.
Preferably, a second vertical fixing member 330 is further arranged between the second horizontal fixing member 220 and the middle vertical fixing member 320, and the second vertical fixing member 330 is vertically arranged and is consistent with the extending direction of the second horizontal fixing member 220; preferably, the lower end surface of the second vertical fixing member 330 is abutted and fixed with the upper side surface of the second horizontal fixing member 220, and the upper end surface of the second vertical fixing member 330 is abutted and fixed with the lower end surface of the middle vertical fixing member 320; more preferably, the second vertical fixing member 330 and the second horizontal fixing member 220 are of an integrated structure, and the cross section of the two is T-shaped or L-shaped, and the upper end surface of the second vertical fixing member 330 is abutted and fixed with the lower end surface of the middle vertical fixing member 320.
Referring to fig. 17 and 18, preferably, the second horizontal fixing member 220 and the second vertical fixing member 330 are disposed at least in a partial region of a side portion of the longitudinal battery row, and are integrally formed, and a parallel connection member 900 is further disposed therebetween, the parallel connection member 900 includes a common adjusting bus duct 920 and a plurality of electrical connection branches 910, and the number of the electrical connection branches 910 is the same as the number of the single batteries 100 in the longitudinal battery row.
Preferably, the common adjusting bus duct 920 is disposed flatly on a side of the second horizontal fixing member 220 away from the single battery 100, the plurality of electrical branches 910 are fixed on a side of the second vertical fixing member 330 opposite to the single battery 100, and the other ends of the electrical branches 910 pass through the second horizontal fixing member 220 and are integrally formed with the common adjusting bus duct 920. The side housings 130 of the adjacent single batteries 100 in the same longitudinal battery column are connected in parallel through the common adjusting bus channel 920 and the power connection branch 910.
In some alternative embodiments, the coupling structure at the bottom of the battery pack may be provided with only the second horizontal fixture 220 and the second vertical fixture 330, without providing the middle vertical fixture 320.
Preferably, the first horizontal fixing member 210, the first vertical fixing member 310, the second horizontal fixing member 220, the middle vertical fixing member 320, and the second vertical fixing member 330 are made of transparent insulating materials with certain elasticity, so that when the connection structure is connected with the battery array in an insulating manner, UV structural adhesive can be applied to the connection position, and at the same time, ultraviolet curing is performed; more preferably, the first horizontal fixing member 210 and/or the second horizontal fixing member 220 are further provided with a plurality of glue injection holes 202 vertically penetrating therethrough, and the arrangement of the glue injection holes 202 can refer to embodiment 1, which is not described herein again.
In a preferred embodiment, when the second horizontal fixing member 220 is configured as a bottom integral horizontal fixing member, the bottom integral horizontal fixing member and the bottom case 140 of each single battery 100 respectively have a connection region, at least four intersection points of the outer side of the edge of each connection region and the corresponding bottom case 140 are respectively provided with a glue injection hole 202 which vertically penetrates through, and the four glue injection holes 202 are evenly distributed on the outer side of the circumference of the bottom case 140 and at least tangent to the circumference.
In a preferred embodiment, as shown in fig. 19, the battery pack further includes a peripheral fixing member 400, the peripheral fixing member 400 being attachable to the outer periphery of the battery array including the side housings 130 of the unit batteries 100 on the peripheral edge and/or the outer surface of the junction block between the side housings 130. Preferably, a UV structural adhesive is further disposed between the peripheral fixing member 400 and the battery, and is fixedly connected to each other in an insulating manner, and the peripheral fixing member 400 is also made of an insulating material having elasticity. Preferably, the peripheral holders 400 are respectively provided around the upper and lower peripheries of the battery array.
Preferably, the cross section of the peripheral fixing member 400 has a shape substantially matching the battery array, and has a substantially rounded rectangular shape, and the peripheral fixing member 400 includes a curved surface outside the side housing 130 of the unit battery 100 disposed at a corner of the battery array, a straight surface outside the side housing 130 of the unit battery 100 disposed on a side length of the battery array, or further includes a straight surface of an outer surface of the adaptor block disposed between the housings; preferably, the straight surface and the curved surface of the peripheral fixing member 400 are integrally fixed or locked and fixed by an insulating mechanical structure; peripheral mount 400 can be wrapped around the battery array and fixedly attached at the intersection. Preferably, peripheral mounting 400 overlaps in the junction and sets up to attach fixedly through insulating mechanical structure lock, the bolt 410 of specific accessible insulating material preparation is fixed, and on the one hand, insulating material's bolt 410 can prevent that the metalwork from dropping and causing the damage of group battery, and on the other hand, insulating mechanical lock attaches still to keep the state of fastening under the condition that gluing agent became invalid between peripheral mounting 400 and the battery array, guarantees that the inside still is crowded tight clearance fit's steady state of battery array.
In the embodiment, on one hand, the connecting structure can provide the horizontal shearing resistance and the vertical bending resistance for the battery pack, and replaces the peeling resistance provided by metal welding and fixing in the prior art, so that the structure of the battery pack is firmer; in the second aspect, after pressurization, the serial battery rows in the battery pack can be subjected to pressure maintaining at least through the first horizontal fixing member 210, so that the diameter tolerance among different single batteries 100 is reduced to the maximum extent, the same resistance of the electrical connection points in the rows is ensured, and balanced grouping is facilitated; the first vertical fixing member 310, the middle vertical fixing member 320 and the second vertical fixing member 330 can abut against the side shell 130 of each single battery 100 in the battery array, and can provide bending resistance in the vertical direction for the battery pack; in a third aspect, the second horizontal fixing members 220 and the middle vertical fixing members 320 arranged at the bottom are vertically staggered, and more preferably, a second vertical fixing member 330 parallel to the second horizontal fixing members 220 is further arranged between the second horizontal fixing members 220 at the bottom and the middle vertical fixing members 320 to form a three-dimensional # -shaped structure, so that the connection stability of the whole battery pack structure is ensured; in the fourth aspect, the connection structure is further provided with a parallel connection member 900 or an electrical connection block 800, so that parallel connection between the battery rows connected in series can be realized, or early isolation of the thermal runaway single battery 100 in the parallel battery rows can be realized, and influence on the work of other normal batteries in the battery pack can be avoided.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various changes or substitutions within the technical scope of the present invention, and these should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (22)

1. A series battery row is characterized by comprising a plurality of single batteries and a connecting structure;
the single battery comprises a top cover, a bottom shell and a side shell, wherein the top cover is provided with a top pole, and the side shell and the bottom shell are provided with shell poles; the single batteries are sequentially and electrically connected in series;
the connecting structure comprises at least one horizontal fixing piece and at least one vertical fixing piece, and the horizontal fixing piece and the vertical fixing piece both comprise sheet-shaped insulators;
the horizontal fixing piece comprises a plurality of first fixing parts which are fixedly connected to at least partial region of the top cover of each single battery and/or at least partial region of the bottom shell of each single battery; the horizontal fixing piece is used for limiting the single battery in the horizontal direction and providing larger anti-shearing force;
the vertical fixing member includes a plurality of second fixing portions fixedly connected to the side surface case of each of the unit cells; the vertical fixing piece is used for providing bending resistance in the vertical direction;
the vertical fixing piece and each single battery are provided with an electric connection block in a partial region where the side surface shells are abutted, the electric connection block penetrates through the vertical fixing piece, one side of the electric connection block is electrically connected with the side surface shells, and the other side of the electric connection block can be electrically connected with the side surface shells of the single batteries of other series battery rows.
2. The series battery bank as claimed in claim 1, wherein at least one side of the extension direction of the series battery bank is provided with the connection structure; the cross section of the connecting structure is T-shaped and/or L-shaped.
3. The series battery string as recited in claim 1, further comprising a bus bar;
the bus bar comprises an extending part and a bending part, one end of the extending part is electrically connected with the top pole, and the other end of the extending part extends to the outer side of the side shell; one end of the bent part is electrically connected with the other end of the extending part, and the other end of the bent part is bent downwards, extends to one side of the side shell close to the adjacent single battery and is abutted and electrically connected with the side shell;
the plurality of single batteries form a series structure through the plurality of bus bars.
4. A parallel battery bank is characterized by comprising a plurality of single batteries and a connecting structure;
the single battery comprises a top cover, a bottom shell and a side shell, wherein the top cover is provided with a top pole, and the side shell and the bottom shell are provided with shell poles; the top pole columns of the single batteries are electrically connected in parallel;
the connecting structure comprises a horizontal fixing piece and a vertical fixing piece, and the horizontal fixing piece and the vertical fixing piece both comprise sheet insulators; the horizontal fixing piece is fixedly connected to at least partial region of the bottom shell of each single battery; the vertical fixing piece is fixedly connected to at least partial region of the side shell of each single battery;
the connecting structure comprises parallel connecting pieces; the parallel connection piece comprises an electric connection branch and a common regulation confluence channel; the public regulating bus channel and the power connection branch circuit are both sheet conductors and are electrically connected with each other;
the common adjusting confluence channel is tiled at one side of the horizontal fixing piece, which is far away from the single battery, and the electric connection branch is arranged at one side of the vertical fixing piece, which is opposite to the single battery; the common adjusting confluence channel is electrically connected with the shell pole columns corresponding to the single batteries through the electric connection branches to form parallel battery branches among the single batteries;
the cross sectional area of the power connection branch is smaller than that of the common adjusting and converging channel; alternatively, the first and second electrodes may be,
the current carrying capacity of the power connection branch is smaller than that of the public regulation confluence channel.
5. A battery pack is characterized by comprising a battery array and a connecting structure;
the battery array comprises a plurality of single batteries which are arranged in the same direction, and the single batteries are arranged in rows along the transverse direction and the longitudinal direction; the single battery comprises a top cover, a side shell and a bottom shell, wherein the top cover is provided with a top pole, and the side shell and the bottom shell are provided with shell poles;
the connecting structure comprises a first horizontal fixing piece, a first vertical fixing piece and a second horizontal fixing piece which all comprise sheet insulators;
the first horizontal fixing piece is horizontally laid between adjacent transverse battery rows along the extending direction of the transverse battery rows, and the first horizontal fixing piece is fixedly connected with the top cover of each single battery in the adjacent transverse battery rows;
the first vertical fixing piece is vertically arranged between adjacent transverse battery rows along the extending direction of the transverse battery rows and is fixedly connected with the side shell part of each single battery in the adjacent transverse battery rows;
the first horizontal fixing piece is abutted and fixed with the first vertical fixing piece, or is of an integrated structure;
an electric connection block is arranged in a partial region where the first vertical fixing piece is abutted with the side shell of each single battery in the transverse battery row, and the electric connection block penetrates through the first vertical fixing piece; two sides of the electric connection block are respectively and electrically connected with the side shell bodies adjacent to the two sides;
the second horizontal fixing pieces are horizontally laid between adjacent transverse battery rows along the extending direction of the transverse battery rows, and the second horizontal fixing pieces are fixedly connected with the bottom shell of each single battery in the adjacent transverse battery rows;
or the second horizontal fixing piece is horizontally laid between the adjacent longitudinal battery rows along the extending direction of the longitudinal battery rows, and the second horizontal fixing piece is fixedly connected with the bottom shell of each single battery in the adjacent longitudinal battery rows.
6. The battery pack according to claim 5, wherein a plurality of adjacent second horizontal fixing members are fastened together or integrally formed to form a bottom integral horizontal fixing member;
the whole horizontal fixed piece in bottom with in the battery array all the battery cell the bottom casing fixed connection.
7. The battery pack according to claim 5, wherein the connecting structure further comprises a middle vertical fixing member, and the extending direction of the middle vertical fixing member is perpendicular to the extending direction of the second horizontal fixing member;
the middle vertical fixing piece is vertically arranged between the adjacent transverse battery rows along the extending direction of the transverse battery rows and is fixedly connected with the side shell part of each single battery in the adjacent transverse battery rows;
or the middle vertical fixing piece is vertically arranged between the adjacent longitudinal battery rows along the extending direction of the longitudinal battery rows and is fixedly connected with the lateral shell part of each single battery in the adjacent longitudinal battery rows.
8. The battery pack according to any one of claims 5 to 7, wherein the connecting structure further comprises a second vertical fixing member provided at the bottom of the side case, the second vertical fixing member being provided in the same direction as the second horizontal fixing member; the second horizontal fixing piece is fixedly connected with the second vertical fixing piece in an abutting mode, or an integrated structure is formed.
9. The battery pack according to claim 5, further comprising a bus bar;
the top pole column protrudes out of the top cover, and the top pole column is electrically connected with the busbar;
the bus bar comprises an extension part and a bending part, one end of the extension part is electrically connected with the top pole, and the other end of the extension part extends to the outer side of the side shell; one end of the bent part is electrically connected with the other end of the extending part, and the other end of the bent part is bent downwards, extends to one side of the side shell close to the adjacent single battery and is abutted and electrically connected with the side shell;
a first insulating block is arranged between the extending part and the top cover of the single battery which is electrically connected with the extending part, and a second insulating block is arranged between the bending part and the side shell of the single battery;
each of the unit cells in the lateral cell rows is electrically connected in series by the bus bar.
10. The battery pack of claim 9, wherein said second insulating block has mating profiles on both sides with corresponding adjacent side housings.
11. The battery pack of claim 9, wherein the first insulating block and the second insulating block are of a unitary structure.
12. The battery pack according to claim 9, wherein a lower end of the second insulation block is lower than a lower end of the bent portion.
13. The battery pack of claim 9, wherein adjacent second insulating blocks in the same longitudinal cell row are of unitary construction and serve as central vertical mounts.
14. The battery pack of claim 8, wherein the connection structure further comprises a parallel connection; the parallel connection piece comprises an electric connection branch and a public regulation confluence channel; the public regulating confluence channel and the power connection branch are both sheet conductors;
the position of the power connection branch corresponds to at least partial region of the side shell of each single battery in the longitudinal battery row, and the power connection branch is only arranged on one side of the second vertical fixing piece opposite to the single batteries; the common adjusting and converging channel is tiled on one side of the second horizontal fixing piece, which is far away from the single battery;
the power connection branch circuit is provided with a first end part and a second end part; the first end part is used for being electrically connected with the side shell of each single battery in the longitudinal battery row, and the second end part penetrates through the second horizontal fixing piece to be electrically connected with the common regulating and collecting channel;
the cross-sectional area of the power connection branch is smaller than that of the common regulating confluence passage; alternatively, the first and second electrodes may be,
and the current carrying capacity of the power connection branch is smaller than that of the public regulation confluence channel.
15. The battery pack of claim 14, wherein the electrical connection block and the parallel connection are electrically connected to the cells by a filled cold-solder crimp.
16. The battery pack according to claim 8, wherein each first horizontal fixing member and the top cover of each pair of adjacent single batteries in the adjacent transverse battery rows respectively have a connection region, at least two junction points of the outer sides of the edges of each connection region and the single batteries are provided with vertically penetrating glue injection holes, and the two glue injection holes are respectively arranged on two sides of a straight line which passes through the center of the top cover and is perpendicular to the transverse battery row direction;
or each second horizontal fixing piece and the bottom shell of each pair of adjacent single batteries are respectively provided with a connecting area, at least two intersection points of the outer side of the edge of each connecting area and the single batteries are provided with vertically penetrating glue injection holes, and the two glue injection holes are respectively arranged on two sides of a straight line which passes through the center of the bottom shell and is perpendicular to the extending direction of the second horizontal fixing piece;
or a plurality of adjacent second horizontal fixing pieces are integrally formed to form a bottom integral horizontal fixing piece; the whole horizontal fixing piece in bottom and each battery cell the bottom casing has the connection region respectively, and the border outside of every connection region and corresponding at least four intersection points of bottom casing are equipped with the injecting glue hole that vertically runs through respectively, four injecting glue hole evenly distributed in the circumference outside of bottom casing to it is tangent at least with the circumference.
17. The battery pack according to claim 16, wherein each glue injection hole is provided with a glue nail structure; the rubber nail structure comprises a rubber cap and a rubber column, the rubber cap is in a nail head shape, and the rubber column is in a nail body shape;
the glue nail structure is simultaneously connected with the first horizontal fixing piece, the first vertical fixing piece and the corresponding side shell of the single battery;
or the glue nail structure is simultaneously connected with the second horizontal fixing piece, the second vertical fixing piece and the corresponding side shell of the single battery;
or the glue nail structure is simultaneously connected with the bottom integral horizontal fixing piece, the second vertical fixing piece and the corresponding side shell of the single battery.
18. The battery pack of claim 17, wherein the cross-sectional diameter of the rubber cap is larger than the diameter of the glue injection hole;
the upper surface of the rubber cap is higher than the upper surface of the first horizontal fixing piece, and the lower surface of the rubber cap abuts against the upper surface of the first horizontal fixing piece;
or the lower surface of the rubber cap is lower than the lower surface of the second horizontal fixing piece, and the upper surface of the rubber cap abuts against the lower surface of the second horizontal fixing piece;
or the lower surface of the rubber cap is lower than the lower surface of the bottom integral horizontal fixing piece, and the upper surface of the rubber cap abuts against the lower surface of the bottom integral horizontal fixing piece.
19. The battery pack according to claim 5, wherein the connection structures and the connection structure and the battery array are fixedly connected by UV structural adhesive.
20. The battery as defined in claim 19, wherein the connection structure comprises a transparent insulating material having elasticity.
21. The battery pack of claim 5, wherein the cell array is an internal gapless fit structure, and the connection structure further comprises a peripheral fixing member fixedly connected to the outer periphery of the cell array; the periphery of the battery array includes: the surfaces of the side housings of the single cells arranged on the peripheral edge of the array, and/or the outer surfaces of the junction blocks between the side housings;
the cross section of the peripheral fixing piece is in a shape matched with the peripheral edge of the battery array, and the peripheral fixing piece can surround the battery array for a circle and is fixedly connected at the junction.
22. The battery pack according to claim 21, wherein the peripheral fixing member is fixedly connected to the periphery of the battery array in an insulating manner through a UV structural adhesive;
the straight surface and the curved surface of the peripheral fixing piece are of an integrated structure or are locked and fixed through an insulating mechanical structure;
and the peripheral fixing piece is locked and fixed at the intersection through an insulating mechanical structure.
CN202211205008.2A 2022-09-30 2022-09-30 Series battery row, parallel battery row and battery pack Active CN115295966B (en)

Priority Applications (1)

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