CN111653721B - Battery roll core and battery - Google Patents
Battery roll core and battery Download PDFInfo
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- CN111653721B CN111653721B CN202010548304.7A CN202010548304A CN111653721B CN 111653721 B CN111653721 B CN 111653721B CN 202010548304 A CN202010548304 A CN 202010548304A CN 111653721 B CN111653721 B CN 111653721B
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- battery
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- guide plate
- winding core
- shaped bent
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- 238000004804 winding Methods 0.000 claims abstract description 81
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 40
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000005452 bending Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 14
- 238000002347 injection Methods 0.000 claims description 13
- 239000007924 injection Substances 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 235000015110 jellies Nutrition 0.000 claims description 7
- 239000008274 jelly Substances 0.000 claims description 7
- 230000000712 assembly Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 4
- 230000003111 delayed effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 9
- 239000000758 substrate Substances 0.000 description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 239000002390 adhesive tape Substances 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 238000003466 welding Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- 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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention discloses a battery winding core and a battery in the field of batteries, and the battery winding core comprises an aluminum shell and at least two battery winding cores which are hermetically arranged in the aluminum shell, wherein each battery winding core comprises at least one single winding core packaged by an insulating bag and a conductive assembly connected with the transverse end part of the single winding core, and two adjacent battery winding cores are in conductive connection through the conductive assembly; and the battery roll cores positioned at the two ends in the aluminum shell are electrically connected with the aluminum shell. The single winding cores are connected in series and in parallel inside the aluminum shell, so that the existence of external connecting pieces is reduced, the single winding cores can be mutually independent and cannot mutually spread when thermal runaway occurs, the occurrence of the thermal runaway is further delayed, and the economic loss is reduced.
Description
Technical Field
The invention relates to the field of batteries, in particular to a battery roll core and a battery.
Background
In order to meet the requirements of voltage and capacity, the conventional power lithium battery needs to be connected in series and in parallel in a battery pack, so that more connecting pieces are added, and the energy density of the battery pack is reduced.
On the other hand, a large-capacity single battery becomes an industry development trend, but the large-capacity single battery is difficult to manufacture, and the whole battery is scrapped when thermal runaway occurs, so that the economic loss is large.
Disclosure of Invention
The present invention is directed to a battery roll core and a battery, so as to solve the problems of the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
a battery roll core comprises
The conductive assembly comprises a guide plate, a thin-wall boss and at least one first conductive connecting sheet; the thin-wall boss is fixed on the back longitudinal surface of the guide plate and is internally provided with a cavity; the first conductive connecting piece comprises an L-shaped bent part, the vertical section of the L-shaped bent part is positioned in the cavity of the thin-wall boss, and the horizontal section of the L-shaped bent part penetrates through the longitudinal surfaces on the two sides of the guide plate and is fixedly connected with the guide plate; the upper surface of the guide plate is provided with a liquid injection hole which is L-shaped and is communicated with the cavity of the thin-wall boss;
the single winding core comprises a winding core body and lugs fixed on the two transverse sides of the winding core body, and two or more single winding cores are arranged in parallel up and down;
the conductive assembly is arranged on the two transverse sides of the single-winding core, the single-winding core is provided with a plurality of lugs which are fixedly connected with the L-shaped bent parts together, and an insulating bag is fixed between the thin-wall bosses of the conductive assembly on the two sides in a sealing manner.
As an improved scheme of the invention, the upper and lower peripheral side walls of at least one guide plate at two sides of the single winding core are provided with sealing grooves.
As an improved scheme of the invention, the first conductive connecting sheet further comprises a reciprocating-folded bow-shaped bent part, and the bottom end of the bow-shaped bent part is integrally connected with the end part of the transverse section of the L-shaped bent part, which is positioned on the front-side longitudinal surface of the deflector; and a pressure relief hole is communicated with the guide plate.
As an improved scheme of the invention, the first conductive connecting sheet is provided with two oppositely arranged L-shaped bent parts which are respectively positioned at two longitudinal sides of the guide plate, and the transverse sections of the two L-shaped bent parts are connected into a whole.
As an improved scheme of the invention, a first pole column is fixed on the longitudinal surface of the front side of at least one guide plate on two sides of the single winding core, and the first pole column is fixedly connected with the end part of the transverse section of the L-shaped bent part; and a first explosion-proof valve is arranged on the guide plate.
A battery comprises an aluminum shell and at least two battery winding cores which are hermetically placed in the aluminum shell, wherein each battery winding core comprises at least one single winding core packaged by an insulating bag and a conductive component connected with the transverse end part of each single winding core, and two adjacent battery winding cores are in conductive connection through the conductive component; and the battery roll cores positioned at the two ends in the aluminum shell are electrically connected with the aluminum shell.
As an improved scheme of the invention, the battery winding core comprises a first battery winding core, a second battery winding core and a third battery winding core, and the conductive assembly comprises a first conductive assembly, a second conductive assembly and a third conductive assembly; in the first battery winding core, the two transverse sides of the single winding core are connected with the first conductive assembly; in the second battery winding core, the two transverse sides of the single winding core are respectively connected with the first conductive assembly and the second conductive assembly; and in the third battery winding core, the two transverse sides of the single winding core are connected with the third conductive assembly.
As the improvement scheme of the invention, the conductive component comprises a guide plate, a thin-wall boss and at least one first conductive connecting sheet; the thin-wall boss is fixed on the back longitudinal surface of the guide plate and is internally provided with a cavity; the first conductive connecting piece comprises an L-shaped bent part, the vertical section of the L-shaped bent part is positioned in the cavity of the thin-wall boss, and the transverse section of the L-shaped bent part penetrates through the longitudinal surfaces of the two sides of the guide plate and is fixedly connected with the guide plate; the upper surface of the guide plate is provided with a liquid injection hole which is L-shaped and is communicated with the cavity of the thin-wall boss;
as an improved scheme of the invention, in the first conductive assembly, the upper and lower peripheral side walls of the deflector are provided with seal grooves, the first conductive connecting sheet further comprises a reciprocating folding bow-shaped bending part, and the bottom end of the bow-shaped bending part is integrally connected with the end part of the transverse section of the L-shaped bending part, which is positioned on the front side longitudinal surface of the deflector; a pressure relief hole is communicated with the guide plate;
in the second conductive assembly, a first pole column is fixed on the longitudinal surface of the front side of the guide plate and fixedly connected with the end part of the transverse section of the L-shaped bent part; the guide plate is provided with a first explosion-proof valve;
in the third conductive assembly, the upper and lower peripheral side walls of the guide plate are provided with seal grooves, the first conductive connecting sheet is provided with two L-shaped bending parts which are oppositely arranged, the two L-shaped bending parts are respectively positioned at the longitudinal two sides of the guide plate, and the transverse sections of the two L-shaped bending parts are connected into a whole.
As an improved scheme of the invention, when the battery roll cores at two ends in the aluminum shell are the third battery roll core, the third conductive assembly at the outer side of the third battery roll core is further connected with a cover plate assembly, the cover plate assembly comprises a base plate, the base plate is fixedly connected with the aluminum shell, a second pole column is fixed on the longitudinal surface at the outer side of the base plate, a second conductive connecting sheet is fixed on the longitudinal surface facing the inner side, the second conductive connecting sheet is respectively in conductive connection with the second pole column and the third conductive assembly, and a second explosion-proof valve is arranged on the base plate.
Has the advantages that: the single winding cores are connected in series and in parallel inside the aluminum shell, so that the existence of external connecting pieces is reduced, the single winding cores can be mutually independent and cannot mutually spread when thermal runaway occurs, the occurrence of the thermal runaway is further delayed, and the economic loss is reduced.
Drawings
FIG. 1 is a schematic three-dimensional structure of a single jellyroll of the present invention;
FIG. 2 is a front view of a single core of the present invention;
FIG. 3 is a schematic front view of a first conductive assembly of the present invention;
FIG. 4 is a schematic backside view of a first conductive assembly of the present invention;
FIG. 5 is a cross-sectional view of a fluid injection hole in the conductive assembly of the present invention;
FIG. 6 is a front view of a conductive tab in a first conductive assembly of the present invention;
FIG. 7 is a side schematic view of a first conductive assembly of the present invention;
FIG. 8 is a cross-sectional view of a first conductive assembly of the present invention;
FIG. 9 is a cross-sectional view of a first conductive assembly of the present invention as assembled with a single winding core;
fig. 10 is a schematic view of the structure of a first battery jelly roll (unassembled insulating pouch) of the present invention;
fig. 11 is a schematic view of the structure of a first battery roll core (with an assembled insulating pouch) of the present invention;
FIG. 12 is a schematic front view of a second conductive assembly of the present invention;
FIG. 13 is a schematic rear view of a second conductive assembly of the present invention;
fig. 14 is a front view of a battery (without an aluminum case assembled) in an embodiment of the invention;
FIG. 15 is a three-dimensional schematic view of a battery (unassembled aluminum case) in an embodiment of the invention;
FIG. 16 is a three-dimensional schematic view of a battery (with an aluminum housing assembled) in an embodiment of the invention;
FIG. 17 is a schematic backside view of a third conductive assembly of the present invention;
FIG. 18 is a schematic front view of a third conductive assembly of the present invention;
FIG. 19 is a rear schematic view of the cover plate assembly of the present invention;
FIG. 20 is a schematic front view of the cover plate assembly of the present invention;
fig. 21 is a top view of a third battery roll core of the present invention;
fig. 22 is a schematic view of the connection of the cover member to the third conductive member in the third battery roll core of the present invention.
In the figure: 10-single roll core: 101-a winding core body; 102-a tab; 20-first conductive component: 201-a first conductive connection pad; 202-a baffle; 203-pressure relief hole; 204-a seal groove; 205-thin-walled bosses; 206-liquid injection hole; 207-sealing ring; 30-first battery roll core: 301-adhesive tape; 302-an insulating bag; 40-second conductive component: 401-a first pole; 402-a first explosion-proof valve; 50-a second battery roll core; 60-aluminum shell; 70-a third conductive component; 80-a cover plate assembly; 801-a substrate; 802-a second conductive connection pad; 803-second explosion-proof valve; 804-a second pole; 90-third battery jelly roll.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Embodiment 1, a battery core, including conductive component and single roll core 10, as shown in fig. 1-2, the single roll core includes a roll core body 101 and tabs 102 fixed on both sides of the roll core body 101, before this embodiment is implemented, first, the tabs 102 are pre-welded, so that the tabs of each layer are connected to each other, which is convenient for subsequent operation. The welding method of the tab 102 is not particularly limited, and ultrasonic welding, laser welding, or the like may be employed. The quantity of the single-winding core 10 is at least one, and when the quantity of the single-winding core 10 is two or more, the single-winding core 10 is arranged in parallel up and down, so that the parallel connection effect with the conductive component is realized.
The conductive elements include a first conductive element 20, a second conductive element 40, and a third conductive element 70, referring to fig. 3-4, the structure of the first conductive element 20, the second conductive element 40, and the third conductive element 70 includes a baffle 202, a thin-wall boss 205, and at least one first conductive connecting tab 201, the baffle 202 is made of an insulating material, and the number of the first conductive connecting tabs 201 corresponds to the number of the single winding cores 10.
The thin-wall boss 205 is fixed on the back longitudinal surface of the guide plate 202 and is internally provided with a cavity; the first conductive connecting piece 201 comprises an L-shaped bent part, the vertical section of the L-shaped bent part is positioned in the cavity of the thin-wall boss 205, and the horizontal section of the L-shaped bent part penetrates through the longitudinal surfaces at two sides of the flow guide plate 202 and is fixedly connected with the flow guide plate 202; as shown in fig. 5, the top surface of the baffle 202 is provided with a liquid injection hole 206, and the liquid injection hole 206 is L-shaped and is communicated with the cavity of the thin-wall boss 205.
The conductive assemblies are arranged on two transverse sides of the single-winding core 10, the tabs 102 of the single-winding cores 10 are fixedly connected with the L-shaped bent portions together, and the insulating bags 302 are fixed between the thin-wall bosses 205 of the conductive assemblies on the two sides in a sealing mode.
In embodiment 2, in the first conductive element 20, the upper and lower peripheral sidewalls of the baffle 202 are provided with the sealing groove 204 in addition to the above-mentioned common structure. As shown in fig. 6-8, the first conductive connecting piece 201 further includes a reciprocating folded bow-shaped bent portion, and the bottom end of the bow-shaped bent portion is integrally connected to the end of the transverse section of the L-shaped bent portion located on the front longitudinal surface of the baffle 202; a pressure relief hole 203 is formed through the baffle 202.
Referring to fig. 9, when the first conductive assembly 20 is connected to the single-winding core 10, the tab 102 is bent and fixed to the L-shaped bent portion of the first conductive connecting tab 201, so as to achieve conductive connection between the single-winding core 10 and the first conductive assembly 20.
In this embodiment, for example, the number of the single winding cores 10 is two, as shown in fig. 10 to 11, the two single winding cores 10 are arranged in parallel up and down, the first conductive assembly 20 includes two first conductive connection pieces 201, and the two first conductive connection pieces 201 are respectively engaged with the tabs 102 of the two single winding cores 10 and are welded and fixed. Then, the upper and lower single-winding cores 10 are wrapped and fixed by an insulating adhesive tape 301 and then fixed by an insulating bag 302.
Preferably, when the first conductive component 20 is attached to both lateral sides of the single jelly roll 10, the battery jelly roll is referred to as a first battery jelly roll 30.
In embodiment 3, as shown in fig. 12 to 13, on the basis of the above-mentioned shared structure, the second conductive component 40 has a first pole 401 fixed on the front longitudinal surface of the baffle 202, and the first pole 401 is fixedly connected to the end of the transverse section of the L-shaped bent portion; a first explosion-proof valve 402 is arranged on the guide plate 202.
Similarly to example 2, the tab 102 of the single winding core 10 was engaged with the L-shaped bent portion, welded thereto, and wound and fixed by an adhesive tape 301 and an insulating bag 302 to form a battery winding core.
When the first conductive member 20 and the second conductive member 40 are connected to both lateral sides of the single winding core 10, respectively, the battery winding core is referred to as a second battery winding core 50.
In embodiment 4, referring to fig. 17 to 18, in the third conductive element 70, on the basis of the above-mentioned common structure, the upper and lower peripheral sidewalls of the baffle 202 are provided with a sealing groove 204. The first conductive connecting piece 201 is provided with two L-shaped bending portions which are oppositely arranged, the two L-shaped bending portions are respectively located at two longitudinal sides of the flow guide plate 202, and the transverse sections of the two L-shaped bending portions are connected into a whole.
When the third conductive element 70 is attached to both lateral sides of the single winding core 10, the cell winding core is referred to as a third cell winding core 90.
In embodiment 5, the battery comprises an aluminum shell 60 and at least two battery winding cores hermetically arranged in the aluminum shell 60, wherein two adjacent battery winding cores are in conductive connection through a conductive component; the battery jelly rolls located at both ends inside the aluminum case 60 are electrically connected to the aluminum case 60.
Fig. 14-16 show an implementation structure diagram of battery, including a first battery roll core 30 and two second battery roll cores 50, second battery roll core 50 distributes in the horizontal both sides of first battery roll core 30 along aluminum hull length direction, and the "bow" type kink of first conductive component 20 in first battery roll core 30 and the "bow" type kink of first conductive component 20 of second battery roll core 50 buckle each other and are connected, and the first utmost point post 401 of the second conductive component 40 of second battery roll core 50 stretches out to the outside of aluminum hull.
In this embodiment, before the first battery roll core 30 and the second battery roll core 50 are assembled into the aluminum case 60, the liquid is injected through the liquid injection hole 206, after the liquid injection is completed, the liquid injection hole 206 is sealed by a sealing needle (not shown), the sealing ring 207 is assembled into the sealing groove 204, and finally the battery roll cores are fixed by the adhesive tape 301 and the insulating bag 302.
In this embodiment, after the assembly of the first battery roll core 30 and the second battery roll core 50 is completed, the first battery roll core 30 is firstly installed in the middle of the aluminum shell 60, then the second battery roll core 50 is respectively installed in the openings at the two ends of the aluminum shell 60, and the second conductive component 40 of the second battery roll core 50 faces outwards, until the first conductive component 20 of the second battery roll core 50 is mutually buckled and connected with the first conductive component 20 of the first battery roll core 30, and then the second conductive component 40 of the second battery roll core 50 is welded and fixed with the aluminum shell.
Or, after the first battery roll core 30 and the second battery roll core 50 are assembled, the first battery roll core 30 and the second battery roll core 50 are sequentially connected, and the whole is installed in the aluminum shell 60 and fixed with the aluminum shell 60, so that the assembly of the battery can be realized.
In example 6, fig. 21 to 22 show another structure of the battery, which includes three third battery winding cores 90, and after the third battery winding cores 90 are filled with liquid, the third conductive components 70 are welded and fixed in sequence, and then are integrally mounted in the aluminum case 60. Then, the cap plate assembly 80 is disposed outside the third battery winding core 90. As shown in fig. 19 to 20, the cover plate assembly 80 includes a substrate 801, the substrate 801 is fixedly connected to the aluminum housing 60, a second pole 804 is fixed on the outer longitudinal surface of the substrate 801, a second conductive connecting piece 802 is fixed on the inner longitudinal surface of the substrate 801, the second conductive connecting piece 802 is respectively electrically connected to the second pole 804 and the third conductive assembly 70, and the substrate is provided with a second explosion-proof valve 803.
Therefore, when the battery is assembled by the battery roll core, the two ends of the aluminum shell 60 need to be provided with a pole structure and an explosion-proof valve structure, the pole structure is a first pole 401 or a second pole 804, the explosion-proof valve is a first explosion-proof valve 402 or a second explosion-proof valve 803, and the number and types of the battery roll cores inside the aluminum shell 60 can be freely combined.
In the above embodiment, the battery roll cores connected in series inside the aluminum shell 60 are independent of each other, the single battery roll cores are also independent of each other inside the single parallel single roll core 10, after thermal runaway occurs in one of the single roll cores 10, the insulating film on the roll core body 101 is broken by gas, and then the release is performed through the pressure relief hole 203, so that the normal work of an uncontrolled area cannot be influenced. After the gas inside the aluminum case 60 reaches the threshold value of the first explosion-proof valve 402 or the second explosion-proof valve 803, the first explosion-proof valve 402 or the second explosion-proof valve 803 is opened, so that the gas is released to the outside.
Therefore, the battery provided by the invention has at least the following beneficial effects that 1, the voltage and the capacity of the lithium battery can be greatly expanded, so that the application range of the lithium battery is expanded; 2. compared with the traditional series-parallel connection method of the lithium battery, the method has the advantages that no additional connecting piece is needed, and the energy density of the battery pack can be effectively improved; 3. the invention has an independent thermal runaway management function, can delay the occurrence of thermal runaway to a certain extent, and can control the thermal runaway in a small-range area.
Although the present description is described in terms of embodiments, not every embodiment includes only a single embodiment, and such description is for clarity only, and those skilled in the art should be able to integrate the description as a whole, and the embodiments can be appropriately combined to form other embodiments as will be understood by those skilled in the art.
In the description of the present invention, it should be noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In the description of the present invention, it should be further noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally put in use of products of the present invention, which are merely for convenience of description and simplification of description, but do not indicate or imply that the referred devices or elements must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Therefore, the above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application; all changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (8)
1. A battery roll core is characterized by comprising
A conductive component comprising a baffle (202), a thin-walled boss (205), and at least one first conductive tab (201); the thin-wall boss (205) is fixed on the back longitudinal surface of the guide plate (202) and is internally provided with a cavity; the first conductive connecting piece (201) comprises an L-shaped bent part, the vertical section of the L-shaped bent part is positioned in the cavity of the thin-wall boss (205), and the horizontal section of the L-shaped bent part penetrates through the longitudinal surfaces of the two sides of the flow guide plate (202) and is fixedly connected with the flow guide plate (202); the upper surface of the guide plate (202) is provided with a liquid injection hole (206), and the liquid injection hole (206) is L-shaped and is communicated with the cavity of the thin-wall boss (205);
the single-winding core (10) comprises a winding core body (101) and lugs (102) fixed on two transverse sides of the winding core body (101), and two or more single-winding cores (10) are arranged in parallel up and down;
the conductive assemblies are arranged on the two transverse sides of the single winding core (10), the lugs (102) of the single winding cores (10) are fixedly connected with the L-shaped bent parts together, and the thin-wall bosses (205) of the conductive assemblies on the two sides are fixedly sealed with the insulating bags (302);
the first conductive connecting piece (201) comprises a bow-shaped bent part which is folded in a reciprocating manner, and the bottom end of the bow-shaped bent part is integrally connected with the end part, located on the front side longitudinal surface of the guide plate (202), of the transverse section of the L-shaped bent part; or the first conductive connecting sheet (201) is provided with two oppositely arranged L-shaped bent parts which are respectively positioned at the two longitudinal sides of the guide plate (202), and the transverse sections of the two L-shaped bent parts are connected into a whole.
2. The battery roll core according to claim 1, wherein the upper and lower peripheral side walls of at least one baffle (202) on both sides of the single roll core (10) are provided with sealing grooves (204).
3. A battery jelly roll according to claim 2, characterized in that a pressure relief hole (203) is arranged through the flow guide plate (202).
4. The battery winding core according to claim 1, characterized in that a first pole column (401) is fixed on the front longitudinal surface of at least one guide plate (202) at two sides of the single winding core (10), and the first pole column (401) is fixedly connected with the end of the transverse section of the L-shaped bent part; and a first explosion-proof valve (402) is arranged on the guide plate (202).
5. A battery comprising an aluminum can (60) and at least two battery winding cores hermetically placed in the aluminum can (60), wherein the battery winding cores comprise at least one single winding core (10) encapsulated by an insulating bag (302) and a conductive component connected with the transverse end part of the single winding core (10), and two adjacent battery winding cores are conductively connected through the conductive component; the battery winding cores positioned at the two ends in the aluminum shell (60) are electrically connected with the aluminum shell (60);
the conductive component comprises a deflector (202), a thin-walled boss (205) and at least one first conductive connection pad (201); the thin-wall boss (205) is fixed on the back longitudinal surface of the guide plate (202) and is internally provided with a cavity; the first conductive connecting piece (201) comprises an L-shaped bent part, the vertical section of the L-shaped bent part is positioned in the cavity of the thin-wall boss (205), and the horizontal section of the L-shaped bent part penetrates through the longitudinal surfaces of the two sides of the flow guide plate (202) and is fixedly connected with the flow guide plate (202); the upper surface of the guide plate (202) is provided with a liquid injection hole (206), and the liquid injection hole (206) is L-shaped and is communicated with the cavity of the thin-wall boss (205);
the conductive assembly comprises a first conductive assembly (20); in the first conductive assembly (20), the upper and lower peripheral side walls of the deflector (202) are provided with a sealing groove (204), the first conductive connecting sheet (201) further comprises a reciprocating folding bow-shaped bending part, and the bottom end of the bow-shaped bending part is integrally connected with the end part of the transverse section of the L-shaped bending part, which is positioned on the front side longitudinal surface of the deflector (202); and a pressure relief hole (203) is communicated with the guide plate (202).
6. The battery of claim 5, wherein the battery roll cores comprise a first battery roll core (30), a second battery roll core (50), and a third battery roll core (90), and the conductive assembly further comprises a second conductive assembly (40) and a third conductive assembly (70); in the first battery winding core (30), two transverse sides of the single winding core (10) are connected with the first conductive assembly (20); in the second battery winding core (50), the two transverse sides of the single winding core (10) are respectively connected with the first conductive component (20) and the second conductive component (40); and in the third battery winding core (90), the two transverse sides of the single winding core (10) are connected with the third conductive component (70).
7. A battery according to claim 6,
in the second conductive assembly (40), a first pole column (401) is fixed on the front longitudinal surface of the guide plate (202), and the first pole column (401) is fixedly connected with the end part of the transverse section of the L-shaped bent part; a first explosion-proof valve (402) is arranged on the guide plate (202);
in the third conductive assembly (70), a sealing groove (204) is formed in the upper peripheral side wall and the lower peripheral side wall of the guide plate (202), the first conductive connecting piece (201) is provided with two L-shaped bending portions which are oppositely arranged, the two L-shaped bending portions are respectively located on the two longitudinal sides of the guide plate (202), and the transverse sections of the two L-shaped bending portions are connected into a whole.
8. The battery according to claim 7, wherein when the battery roll cores at two ends of the aluminum case (60) are the third battery roll core (90), the third conductive component (70) at the outer side of the third battery roll core (90) is further connected with a cover plate component (80), the cover plate component (80) comprises a base plate (801), the base plate (801) is fixedly connected with the aluminum case (60), the longitudinal surface at the outer side of the base plate (801) is fixed with a second pole (804), the longitudinal surface at the inner side of the base plate is fixed with a second conductive connecting sheet (802), the second conductive connecting sheet (802) is respectively in conductive connection with the second pole (804) and the third conductive component (70), and the base plate is provided with a second explosion-proof valve (803).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010548304.7A CN111653721B (en) | 2020-06-16 | 2020-06-16 | Battery roll core and battery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN103178292A (en) * | 2013-02-05 | 2013-06-26 | 中聚电池研究院有限公司 | Lithium ion battery and assembly method thereof |
| JP2016046113A (en) * | 2014-08-22 | 2016-04-04 | 株式会社デンソー | Sealed battery module and method for manufacturing the same |
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| CN110518156A (en) * | 2019-10-23 | 2019-11-29 | 比亚迪股份有限公司 | A kind of lithium ion battery, battery modules, battery pack and automobile |
| CN110828744A (en) * | 2020-01-13 | 2020-02-21 | 比亚迪股份有限公司 | Battery, battery pack and electric vehicle |
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| JP2016046113A (en) * | 2014-08-22 | 2016-04-04 | 株式会社デンソー | Sealed battery module and method for manufacturing the same |
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| CN110518174A (en) * | 2019-10-23 | 2019-11-29 | 比亚迪股份有限公司 | A kind of battery, battery modules, battery pack and electric vehicle |
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