CN113851698A - Power lithium ion battery - Google Patents
Power lithium ion battery Download PDFInfo
- Publication number
- CN113851698A CN113851698A CN202111188559.8A CN202111188559A CN113851698A CN 113851698 A CN113851698 A CN 113851698A CN 202111188559 A CN202111188559 A CN 202111188559A CN 113851698 A CN113851698 A CN 113851698A
- Authority
- CN
- China
- Prior art keywords
- negative
- cover plate
- positive
- winding core
- support rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
-
- 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
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
- H01M50/529—Intercell connections through partitions, e.g. in a battery casing
-
- 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
- H01M50/531—Electrode connections inside a battery casing
- H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
-
- 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
-
- 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
Abstract
The invention discloses a power lithium ion battery, which comprises: the winding core assembly comprises a shell, a winding core group, a positive cover plate and a negative cover plate; the book core group includes fixed bolster and a plurality of book core, wherein: the fixed support is provided with a plurality of placing grooves, the winding cores are placed in the placing grooves and correspond to the placing grooves one by one, the positive pole lugs of the winding cores are connected in series, and the negative pole lugs of the winding cores are connected in series; the positive cover plate and the negative cover plate are respectively fixed on two opposite sides of the winding core group and used for coating the two opposite sides of the winding core group; the shell is arranged on the outer side of the winding core group and used for coating the winding core group. The battery of the invention cancels the process of A/B winding core pairing, avoids the waste caused by the problems of wrong winding core pairing, unmatched quantity and the like, and greatly improves the product quality.
Description
Technical Field
The invention relates to the technical field of lithium batteries, in particular to a power lithium ion battery.
Background
At present, the lithium ion winding core is produced in a winding forming mode, then a battery is produced by forming a mode of pairing the A/B winding core, not only the A/B winding machine needs to be configured respectively, but also the pairing machine of the A/B winding core needs to be configured, and the A/B winding core is extremely easy to be paired and disordered, so that the quantity is not matched, the production efficiency and the qualification rate are greatly hindered, and the production quality is verified.
Secondly, when a plurality of batteries form a module, the more the number of the single battery is, the more difficult the control of the voltage and capacity consistency of the whole module is, the wooden barrel effect is easy to occur, and the whole battery module is seriously influenced.
Disclosure of Invention
In order to solve the technical problems in the background technology, the invention provides a power lithium ion battery.
The invention provides a power lithium ion battery, which mainly comprises: the winding core assembly comprises a shell, a winding core group, a positive cover plate and a negative cover plate;
the book core group includes fixed bolster and a plurality of book core, wherein:
the fixed support is provided with a plurality of placing grooves, the winding cores are placed in the placing grooves and correspond to the placing grooves one by one, the positive pole lugs of the winding cores are connected in series, the negative pole lugs of the winding cores are connected in series, the placing grooves are distributed along the length direction of the fixed support, and the winding cores are sequentially clamped in the placing grooves;
the winding core is respectively provided with a positive electrode lug and a negative electrode lug, the positive electrode lug and the negative electrode lug are respectively positioned at the opposite sides of the winding core, and the positive electrode lug and the negative electrode lug are respectively positioned at the middle position of the winding core; the positive pole lugs of the plurality of winding cores are arranged at the same side, and the negative pole lugs of the winding cores are arranged at the same side;
the positive cover plate and the negative cover plate are respectively fixed on two opposite sides of the winding core group and used for coating the two opposite sides of the winding core group;
the shell is arranged on the outer side of the winding core group and used for coating the winding core group.
In order to increase the stability, the invention further comprises an anode connecting sheet and a cathode connecting sheet, wherein the anode connecting sheet and the cathode connecting sheet are respectively used for connecting an anode tab and a cathode tab in series, the anode connecting sheet is welded with all the winding core anode tabs to form an anode tab group, the cathode connecting sheet is welded with all the winding core cathode tabs to form a cathode tab group, the anode connecting sheet is positioned between the winding core and the anode cover plate, and the cathode connecting sheet is positioned between the winding core and the cathode cover plate.
Furthermore, the width of the positive connecting piece is smaller than the height of the positive pole lug, and the width of the negative connecting piece is smaller than the height of the negative pole lug.
Furthermore, the length of the positive connecting piece is slightly smaller than that of the fixing support, and the length of the negative connecting piece is slightly smaller than that of the fixing support.
In order to increase the stability of the battery and avoid the shaking of the winding core, as a further optimized scheme of the invention, the positive cover plate and the negative cover plate are respectively fixed on the positive connecting piece and the negative connecting piece.
Furthermore, the fixed support is made of an insulating material, the size of the placing groove is slightly larger than that of the winding core, and a single winding core can be stored in the single placing groove;
further, the fixing support comprises an anode support rod, a cathode support rod and a plurality of separating rods, the anode support rod and the cathode support rod are arranged in parallel, the separating rods are fixed between the anode support rod and the cathode support rod and are perpendicular to the anode support rod and the cathode support rod, the plurality of separating rods are uniformly distributed along the length direction of the anode support rod or the cathode support rod, a plurality of placing grooves are formed among the anode support rod, the cathode support rod and the plurality of separating rods, the bottoms of the left side and the right side of the fixing support respectively extend out for fixedly placing the winding cores, namely, the bottoms of the anode support rod and the cathode support rod are provided with extension parts extending outwards, and the extension parts are used for supporting the winding cores;
furthermore, a winding core baffle is arranged at one end of the fixed support, the height of the winding core baffle is higher than that of the winding core, and a plurality of cavities are formed in the baffle and used for backflow of electrolyte;
furthermore, the fixing frames on the front side and the rear side of the fixing support are slightly lower than the height of the tabs, namely the height of the separating rod is lower than the height of the tabs, so that a roll core is ensured to be arranged in the fixing support, and the positive electrode tabs and the negative electrode tabs can be lapped on the fixing frames.
Furthermore, the negative electrode cover plate comprises a pole, and the positive electrode cover plate does not comprise a pole.
Furthermore, the width of the positive cover plate is slightly larger than the thickness of the winding core, and the width of the negative cover plate is slightly larger than the thickness of the winding core.
Furthermore, the length of the positive electrode cover plate is slightly greater than that of the fixing support, and the length of the negative electrode cover plate is slightly greater than that of the fixing support.
Furthermore, the positive cover plate is welded and fixed with the positive connecting piece, and the negative cover plate is welded and fixed with the negative connecting piece.
In some embodiments, the housing forms an enclosed cavity with the positive and negative cover plates.
In some embodiments, the casing forms a closed cavity with the fixing support, the positive cover plate and the negative cover plate, and the positive tab and the negative tab are bent to enable the positive cover plate and the negative cover plate to be erected to cover the winding core.
Further, the shell comprises a lower shell and an upper cover plate.
Furthermore, the whole winding core group is placed in the lower shell, the upper cover plate is covered, and the periphery is welded to form the sealed battery.
Compared with the existing battery, the power lithium ion battery provided by the invention has the following advantages:
1. according to the battery, the process of A/B winding core pairing is cancelled, waste caused by the problems of wrong pairing of winding cores, unmatched quantity and the like is avoided, and the product quality is greatly improved;
2. the battery breaks the dependency of the traditional mode on the failure rate of the winding machine, and avoids the limitation of the production capacity of the winding machine B when the winding machine for producing the winding core A fails;
3. the internal space of the battery is slightly larger than that of the traditional battery, so that the liquid injection is facilitated, and the liquid injection infiltration capacity is improved;
4. the battery provided by the invention has only one shell, and the shell is filled in by a mode of closing the cover up and down, so that the problems of difficult shell filling and high shell filling rejection rate in the traditional mode are effectively avoided, and the one-time qualified rate of production is improved;
5. according to the battery, the number of the winding core groups connected in parallel can be matched at will, the requirements of different voltages and different capacities can be met, and flexible production can be realized according to the requirements;
6. the battery of the invention has consistent production process and parameters, and compared with the traditional battery module, the battery of the invention has high capacity and good consistency, and avoids the wooden barrel effect;
7. according to the battery, the positive cover plate is provided with no pole, when the battery is assembled into a module, the flatness consistency of the bottom surface of the battery is good, and the battery in the module is fixed more firmly.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic view of a fixing bracket according to the present invention;
FIG. 2 is a schematic structural diagram of a first embodiment of the present invention, in which a winding core is placed on a fixing support to fix a positive connection sheet and a negative connection sheet;
FIG. 3 is a schematic view of an assembled upper positive cover plate and upper negative cover plate according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an assembled lower housing according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a second embodiment of the present invention;
FIG. 6 is a structural schematic diagram of a second embodiment of the present invention, in which a winding core is placed on a fixing support to fix a positive connection sheet and a negative connection sheet;
FIG. 7 is a schematic diagram of a structure of a winding core set after bending of a diode lug according to an embodiment of the invention;
FIG. 8 is a schematic structural diagram of the two-component lower housing according to the embodiment of the present invention;
fig. 9 is a schematic structural diagram of a second embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar designations denote like or similar elements or elements having like or similar functionality throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
It will be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience and simplicity of description only and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Example one
The power lithium ion battery shown in fig. 1-5 comprises a shell 1, a winding core group 2, a positive connecting sheet 7, a negative connecting sheet 8, a positive cover plate 3 and a negative cover plate 4, wherein:
the winding core group 2 comprises a winding core 20 and a fixing bracket 21;
a plurality of winding cores 20 are arranged in the winding core group 2, in the embodiment, six winding cores 20 are arranged, the six winding cores 20 are sequentially arranged in the fixed support 21, when the winding cores 20 are arranged, the positive pole lugs 200 of all the winding cores 20 face to the same side, and the negative pole lugs 201 of all the winding cores 20 face to the same side;
specifically, the fixing bracket 21 includes an anode support bar 210, a cathode support bar 211 and a plurality of separation bars 212, the anode support bar 210, the cathode support bar 211 and the plurality of separation bars 212 are made of an insulating material, the anode support bar 210 and the cathode support bar 211 are arranged in parallel, the separation bars 212 are fixed between the anode support bar 210 and the cathode support bar 211 and the separation bars 212 are perpendicular to the anode support bar 210 and the cathode support bar 211, the plurality of separation bars 212 are uniformly distributed along the length direction of the anode support bar 210 or the cathode support bar 211, a plurality of placing grooves 213 are formed between the anode support bar 210, the cathode support bar 211 and the plurality of separation bars 212, the plurality of placing grooves 213 are uniformly distributed along the length direction of the anode support bar 210 or the cathode support bar 211, the cross-sectional area of the placing grooves 213 is slightly larger than that of the winding core 20, one winding core 20 is placed in one placing groove 213, and the lower bottom surface of the winding core 20 and the cathode support bar 211, the winding core 211, The lower bottom surfaces of the positive electrode support bar 210 and the separation bar 212 are on the same surface or above the lower bottom surfaces of the negative electrode support bar 211, the positive electrode support bar 210 and the separation bar 212, preferably, the lower bottom surface of the winding core 20 and the lower bottom surfaces of the negative electrode support bar 211, the positive electrode support bar 210 and the separation bar 212 are on the same surface, so as to increase the stability of the winding core 20;
the winding core 20 is provided with a positive electrode tab 200 and a negative electrode tab 201, the positive electrode tab 200 and the negative electrode tab 201 are respectively positioned at two opposite sides of the winding core 20, and the positive electrode tab 200 and the negative electrode tab 201 are respectively positioned at the middle position of the winding core 20;
the lower surfaces of the positive electrode tab 200 and the negative electrode tab 201 are respectively contacted with the positive electrode support rod 210 and the negative electrode support rod 211, and the positive electrode support rod 210 and the negative electrode support rod 211 are respectively used for supporting the positive electrode tab 200 and the negative electrode tab 201 of the winding core 20;
in order to ensure the support of the positive pole tab 200 and the negative pole tab 201 by the positive pole support rod 210 and the negative pole support rod 211, the height of the upper surface of the separation rod 212 is lower than that of the upper surfaces of the positive pole support rod 210 and the negative pole support rod 211, that is, the thickness of the separation rod 212 is lower than that of the tab;
a winding core baffle plate 5 is arranged on one side of the fixed support 21, the height of the winding core baffle plate 5 is higher than that of the winding core 20, a plurality of through holes 50 are formed in the winding core baffle plate 5, and the through holes 50 are used for electrolyte backflow;
the positive connecting piece 7 and the negative connecting piece 8 are respectively positioned at one side of the positive pole lug 200 and the negative pole lug 201 of the winding core 20, the positive pole lugs 200 of the six winding cores 20 penetrate through the positive connecting piece 7 and are welded on the positive connecting piece 7, and the negative pole lugs 201 of the six winding cores 20 penetrate through the negative pole connecting piece 8 and are welded on the negative pole connecting piece 8;
specifically, a positive electrode tab 200 connecting through hole is formed on the positive electrode connecting sheet 7, the positive electrode tab 200 penetrates through the positive electrode tab 200 connecting through hole, a negative electrode tab 201 connecting through hole is formed on the negative electrode connecting sheet 8, and the negative electrode tab 201 penetrates through the negative electrode tab 201 connecting through hole;
the widths of the positive connecting piece 7 and the negative connecting piece 8 are respectively smaller than the heights of the positive tab 200 and the negative tab 201, the lengths of the positive connecting piece 7 and the negative connecting piece 8 are smaller than the length of the fixed support 21, namely the length of the positive connecting piece 7 is smaller than the length of the positive support rod 210, and the length of the negative connecting piece 8 is smaller than the length of the negative support rod 211;
the positive cover plate 3 and the negative cover plate 4 are respectively positioned at one side of the positive connecting sheet 7 far away from the negative pole lug 201 and one side of the negative connecting sheet 8 far away from the positive pole lug 200, and the positive cover plate 3 and the negative cover plate 4 are respectively covered and sealed at one side of the winding core 20 with the positive pole lug 200 and the negative pole lug 201;
specifically, the negative electrode cover plate 4 is provided with an electrode post 6;
specifically, the anode cover plate 3 and the cathode cover plate 4 are respectively fixed on the anode connecting piece 7 and the cathode connecting piece 8 in a welding mode; the positive cover plate 3 and the negative cover plate 4 respectively seal two sides of the fixed support 21, and the upper surfaces of the positive cover plate 3 and the negative cover plate 4 are positioned on the same surface and above the upper surface of the winding core 20;
in the prior art, the shell 1 is a shell 1 with four closed sides, which is not convenient for entering the shell, the shell 1 in this embodiment includes a lower shell 10 and an upper cover plate 11, the upper cover plate 11 is fixed on the lower shell 10, and two accommodating cavities with oppositely arranged openings are formed between the lower shell 10 and the upper cover plate 11, the winding core 20 group is located in the accommodating cavities, the positive cover plate 3 and the negative cover plate 4 of the winding core 20 group respectively seal the two openings of the accommodating cavities, and the positive cover plate 3 and the negative cover plate 4 are welded with the lower shell 10 and the upper cover plate 11 to seal the winding core 20;
specifically, the lower casing 10 includes a lower base plate 100, a first side plate 101 and a second side plate 102, the first side plate 101 and the second side plate 102 are respectively fixed at two ends of the lower base plate 100, the first side plate 101 and the second side plate 102 are perpendicular to the lower base plate 100 and are on the same side of the lower base plate 100, and an accommodating space for accommodating the winding core 20 group is formed between the first side plate 101, the second side plate 102 and the lower base plate 100.
In a specific assembly process: firstly, a plurality of winding cores 20 are sequentially placed in a placing groove 213 on a fixed support 21, a positive electrode lug 200 and a negative electrode lug 201 of each winding core 20 are respectively supported by the upper surfaces of a positive electrode support rod 210 and a negative electrode support rod 211, and the lower bottom surfaces of the winding cores 20 and the lower bottom surface of the fixed support 21 are in the same plane;
then, mounting the positive electrode connecting piece 7, sleeving the positive electrode connecting piece 7 on the positive electrode tabs 200 of the plurality of winding cores 20 through the positive electrode tab 200 connecting through holes, namely, the positive electrode tabs 200 penetrate through the positive electrode connecting piece 7, and then welding the positive electrode tabs 200 on the positive electrode connecting piece 7 to finish the mounting of the positive electrode connecting piece 7; the installation of the negative connecting sheet 8 is carried out in the same way;
then bending the positive electrode tab 200 and the negative electrode tab 201 to enable the positive electrode tab 200 and the negative electrode tab 201 to be positioned right above the fixed support 21;
then fixing the positive cover plate 3 and the negative cover plate 4 on the positive connecting piece 7 and the negative connecting piece 8 respectively in a welding mode, so that the positive cover plate 3 and the negative cover plate 4 respectively shield two sides of the winding core 20, and the assembly of the winding core 20 group is completed;
then, the winding core 20 group is placed in the containing cavity of the lower shell 10, even if two ends of the winding core 20 group along the width direction thereof are respectively abutted against the first side plate 101 and the second side plate 102, the lower bottom surface of the winding core 20 group is contacted with the upper surface of the lower base plate 100, then the bottom ends and two sides of the anode cover plate 3 and the cathode cover plate 4 are respectively welded on the lower shell 10, that is, the bottom of the anode cover plate 3 and the bottom of the cathode cover plate 4 are welded with the lower base plate 100, two sides of the anode cover plate 3 and the cathode cover plate 4 are respectively welded with the first side plate 101 and the second side plate 102, then the upper cover plate 11 is covered on the winding core 20 group, and the periphery of the upper cover plate 11 is respectively welded and sealed with the first side plate 101, the second side plate 102, the anode cover plate 3 and the cathode cover plate 4, that is, the shell 1, the anode cover plate 3 and the cathode cover plate 4 form a sealed cavity for containing the winding core 20, and the anode tab 200 and the cathode tab 201 of the winding core 20 are fixed on the anode cover plate 3 and the cathode cover plate 4 to complete the fixation of the winding core 20 .
Example two
As shown in fig. 6-9, the present embodiment is different from the above embodiments in that the side plate of the sealed winding core 20 is composed of the positive cover plate 3, the negative cover plate 4 and the side plate of the fixing bracket 21, that is, the side plate of the sealed winding core 20 is formed by welding the positive cover plate 3 and the positive support rod 210 and welding the negative cover plate 4 and the negative support rod 211, that is, the shell 1 forms a sealed cavity with the positive cover plate 3, the negative cover plate 4 and the fixing bracket 21, and the sealed cavity is used for sealing the winding core 20;
the advantage of this embodiment over the above embodiments is that the installation of the positive electrode cover plate 3 and the negative electrode cover plate 4 is facilitated, and before the installation of the positive electrode connecting piece 7 and the negative electrode connecting piece 8, the positive electrode cover plate 3 and the negative electrode cover plate 4 can be fixed on the lower bottom surfaces of the positive electrode connecting piece 7 and the negative electrode connecting piece 8 by welding, as shown in fig. 5, the positive electrode connecting piece 7 and the negative electrode connecting piece 8 are fixed on the positive electrode tab 200 and the negative electrode tab 201 by welding, and then the positive electrode cover plate 3 and the negative electrode cover plate 4 are located below the positive electrode connecting piece and the negative electrode connecting piece 8; then after bending the positive electrode tab 200 and the negative electrode tab 201, as shown in fig. 6, the positive electrode cover plate 3 and the negative electrode cover plate 4 are vertically arranged instead of being horizontally arranged, so that the bottoms of the positive electrode cover plate 3 and the negative electrode cover plate 4 are respectively contacted with the upper surface of the fixing support 21 and are welded and fixed to form a side plate for sealing the winding core 20, that is, the positive electrode cover plate 3 and the positive electrode support rod 210 are welded and fixed, the outer side surface of the positive electrode cover plate 3 and the outer side surface of the positive electrode support rod 210 are on the same surface, the negative electrode cover plate 4 and the negative electrode support rod 211 are welded and fixed, and the outer side surface of the negative electrode cover plate 4 and the outer side surface of the negative electrode support rod 211 are on the same surface;
as shown in fig. 7, when the core 20 assembly is assembled with the housing, the core 20 assembly is first placed in the receiving cavity of the lower case 10, even though two ends of the core 20 assembly along the width direction thereof respectively abut against the first side plate 101 and the second side plate 102, the lower bottom surface of the core 20 assembly contacts with the upper surface of the lower bottom plate 100, then the bottom ends of the positive cover plate 3 and the negative cover plate 4 are welded to the lower case 10, i.e. the bottom of the positive cover plate 3 and the bottom of the negative cover plate 4 are welded to the lower bottom plate 100, two sides of the positive cover plate 3, the negative cover plate 4 and the fixing bracket 21 are respectively welded to the lower case 10, i.e. two sides of the positive cover plate 3, the positive support rod 210 and the negative rear rod and the negative cover plate 4 are respectively welded to the first side plate 101 and the second side plate 102, then the upper cover plate 11 is covered on the core 20 assembly, and the periphery of the upper cover plate 11 is respectively welded to the first side plate 101, the second side plate 102, the first side plate, the second side plate 102, the second side plate, the fixing bracket, and the fixing bracket, and the fixing bracket, and the fixing bracket, the fixing bracket, The positive electrode cover plate 3 and the negative electrode cover plate 4 are welded and sealed.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The power lithium ion battery is characterized by comprising a shell, a winding core group, an anode cover plate and a cathode cover plate, wherein,
the book core group includes fixed bolster and a plurality of book core, wherein:
the fixed support is provided with a plurality of placing grooves, the winding cores are placed in the placing grooves and correspond to the placing grooves one by one, the positive pole lugs of the winding cores are connected in series, and the negative pole lugs of the winding cores are connected in series;
the positive cover plate and the negative cover plate are respectively fixed on two opposite sides of the winding core group and used for coating the two opposite sides of the winding core group;
the shell is arranged on the outer side of the winding core group and used for coating the winding core group.
2. The power lithium ion battery of claim 1, further comprising a positive connection tab and a negative connection tab for connecting in series a positive tab and a negative tab, respectively, the positive connection tab being located between the winding core and the positive cover plate, and the negative connection tab being located between the winding core and the negative cover plate.
3. The power lithium ion battery of claim 2, wherein the positive cover plate and the negative cover plate are respectively fixed to the positive connection piece and the negative connection piece.
4. The power lithium ion battery of claim 1, wherein the negative cover plate is provided with a post.
5. The power lithium ion battery of claim 1, wherein a winding core baffle is disposed on one side of the fixing bracket, and an upper surface of the winding core baffle is higher than an upper surface of the winding core.
6. The power lithium ion battery of claim 5, wherein the jelly roll baffle is provided with a plurality of through holes.
7. The power lithium ion battery of claim 1, wherein the fixing bracket comprises a positive support rod, a negative support rod and a plurality of separation rods, the positive support rod and the negative support rod are arranged in parallel, the separation rods are fixed between the positive support rod and the negative support rod and are perpendicular to the positive support rod and the negative support rod, the plurality of separation rods are uniformly distributed along the length direction of the positive support rod or the negative support rod, and a plurality of placing grooves are formed among the positive support rod, the negative support rod and the plurality of separation rods.
8. The power lithium ion battery of claim 7, wherein the separator bar upper surface is located below the positive support bar and the negative support bar upper surfaces.
9. The power lithium ion battery of any one of claims 1-8, wherein the housing forms a closed cavity with the stationary support, the positive cover plate, and the negative cover plate.
10. The power lithium ion battery of any one of claims 1-8, wherein the housing forms an enclosed cavity with the positive and negative cover plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111188559.8A CN113851698A (en) | 2021-10-12 | 2021-10-12 | Power lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111188559.8A CN113851698A (en) | 2021-10-12 | 2021-10-12 | Power lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113851698A true CN113851698A (en) | 2021-12-28 |
Family
ID=78978013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111188559.8A Pending CN113851698A (en) | 2021-10-12 | 2021-10-12 | Power lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113851698A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201438490U (en) * | 2009-04-30 | 2010-04-14 | 天津市捷威动力工业有限公司 | Lithium ion power battery |
| CN103199202A (en) * | 2013-03-19 | 2013-07-10 | 东莞市力嘉电池有限公司 | Lithium ion power battery |
| WO2017161835A1 (en) * | 2016-03-22 | 2017-09-28 | 宁德时代新能源科技股份有限公司 | Battery module |
| CN211507809U (en) * | 2020-03-31 | 2020-09-15 | 蜂巢能源科技有限公司 | Lithium ion battery, battery module and battery pack |
-
2021
- 2021-10-12 CN CN202111188559.8A patent/CN113851698A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201438490U (en) * | 2009-04-30 | 2010-04-14 | 天津市捷威动力工业有限公司 | Lithium ion power battery |
| CN103199202A (en) * | 2013-03-19 | 2013-07-10 | 东莞市力嘉电池有限公司 | Lithium ion power battery |
| WO2017161835A1 (en) * | 2016-03-22 | 2017-09-28 | 宁德时代新能源科技股份有限公司 | Battery module |
| CN211507809U (en) * | 2020-03-31 | 2020-09-15 | 蜂巢能源科技有限公司 | Lithium ion battery, battery module and battery pack |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11936049B2 (en) | Battery unit and battery module | |
| US20170054182A1 (en) | Method for producing a battery cell and battery cell | |
| CN215896625U (en) | Battery with long battery core and battery module | |
| CN211125717U (en) | Battery pack | |
| CN113851698A (en) | Power lithium ion battery | |
| CN213692277U (en) | Lead-acid storage battery | |
| CN113764787B (en) | Electricity core subassembly, battery package and car | |
| CN113764791B (en) | Electricity core subassembly, battery package and car | |
| CN112259916A (en) | Lead-acid storage battery and manufacturing method thereof | |
| JP2017098011A (en) | Battery module for vehicle | |
| CN218602696U (en) | Integrated battery | |
| CN218887362U (en) | Battery, battery pack, and vehicle | |
| CN220341370U (en) | Battery pack structure and device using battery pack | |
| CN105470430B (en) | A kind of battery case | |
| CN211350727U (en) | Electricity core support | |
| CN219393657U (en) | Battery cell | |
| CN220042221U (en) | Battery and battery pack | |
| CN217387478U (en) | Battery device and fixing plate | |
| JP4399917B2 (en) | Lead acid battery and manufacturing method thereof | |
| US20230021008A1 (en) | Electrochemical cell with three-dimensional electrode structure | |
| CN219959365U (en) | Insulating part for large cylindrical battery | |
| CN217468628U (en) | Battery device | |
| CN220324676U (en) | Lower cover plate assembly, battery shell and single battery | |
| CN220774612U (en) | Energy storage power supply | |
| CN216850056U (en) | Lead-acid storage battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |