CN114639926A - Battery and method for assembling battery - Google Patents
Battery and method for assembling battery Download PDFInfo
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- CN114639926A CN114639926A CN202210344031.3A CN202210344031A CN114639926A CN 114639926 A CN114639926 A CN 114639926A CN 202210344031 A CN202210344031 A CN 202210344031A CN 114639926 A CN114639926 A CN 114639926A
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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
- H01M50/531—Electrode connections inside a battery casing
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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
- H01M10/04—Construction or manufacture in general
- H01M10/0404—Machines for assembling batteries
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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
- H01M10/06—Lead-acid accumulators
- H01M10/12—Construction or manufacture
- H01M10/14—Assembling a group of electrodes or separators
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- 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 relates to the technical field of batteries, and provides a battery and a battery assembly method. The battery comprises a battery cell unit and a battery shell, wherein the battery cell unit is arranged in the battery shell, and the battery cell unit comprises: the battery comprises a first battery cell, a second battery cell and a battery cover, wherein the first battery cell comprises a first battery cell body, a first positive electrode lug and a first negative electrode lug, and the first positive electrode lug and the first negative electrode lug extend out from one end of the first battery cell body along a first direction; the first battery cell and the second battery cell are arranged along a first direction, the second battery cell comprises a second battery cell body, a second positive electrode lug and a second negative electrode lug, and the second positive electrode lug and the second negative electrode lug extend out from one end of the second battery cell body along a second direction; the first positive electrode lug is electrically connected with the second positive electrode lug, the first negative electrode lug is electrically connected with the second negative electrode lug, and two electrode leading-out ends of the battery cell unit can be led out from the same side of the battery shell, so that the battery is convenient to assemble.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a battery and an assembly method of the battery.
Background
In the related art, the battery includes a battery case and a battery cell installed in the battery case, and the process difficulty of forming the battery cell with a large capacity is large due to the limitation of the forming process of the battery cell itself.
Disclosure of Invention
The invention provides a battery and a battery assembling method, which are used for improving the performance of the battery.
According to a first aspect of the present invention, there is provided a battery including a cell unit and a battery case, the cell unit being disposed in the battery case, the cell unit including:
the battery comprises a first battery cell, a second battery cell and a battery cover, wherein the first battery cell comprises a first battery cell body, a first positive electrode lug and a first negative electrode lug, and the first positive electrode lug and the first negative electrode lug extend out from one end of the first battery cell body along a first direction;
the first battery cell and the second battery cell are arranged along a first direction, the second battery cell comprises a second battery cell body, a second positive electrode lug and a second negative electrode lug, and the second positive electrode lug and the second negative electrode lug extend out from one end of the second battery cell body along a second direction;
the first positive electrode tab is electrically connected with the second positive electrode tab, the first negative electrode tab is electrically connected with the second negative electrode tab, and the first direction and the second direction are opposite.
The battery provided by the embodiment of the invention comprises a battery cell unit and a battery shell, wherein the battery cell unit is arranged in the battery shell. The battery cell unit comprises a first battery cell and a second battery cell, so that the capacity requirement of the battery is met, and the forming difficulty of the battery cells can be reduced for the battery with higher capacity requirement, so that the performance of the battery is improved. And the first positive pole utmost point ear and the first negative pole utmost point ear of first electric core extend out by the one end of first electric core body along first direction, the second positive pole utmost point ear and the second negative pole utmost point ear of second electric core extend out by the one end of second electric core body along the second direction, through being connected first positive pole utmost point ear and second positive pole utmost point ear electricity, first negative pole utmost point ear is connected with second negative pole utmost point ear electricity, thereby realize the parallel connection of first electric core and second electric core, and two electrodes of electric core unit are drawn forth the end and can be drawn forth by battery case's homonymy, thereby make things convenient for the equipment of battery.
According to a second aspect of the present invention, there is provided a battery assembling method comprising:
connecting a first cell and a second cell in parallel;
the method comprises the steps that a first battery cell and a second battery cell which are connected in parallel are sealed in a battery shell, so that a first positive pole lug and a first negative pole lug of the first battery cell extend out from one end of a first battery cell body of the first battery cell along a first direction, a second positive pole lug and a second negative pole lug of the second battery cell extend out from one end of a second battery cell body of the second battery cell along a second direction, and the first battery cell and the second battery cell are sealed in the battery shell along the first direction;
wherein, the first direction and the second direction are two opposite directions.
According to the assembling method of the battery provided by the embodiment of the invention, the first battery cell and the second battery cell which are connected in parallel are sealed in the battery shell, so that the capacity requirement of the battery is met, and the forming difficulty of the battery cell can be reduced for the battery with higher capacity requirement, so that the performance of the battery is improved. And the first positive pole utmost point ear and the first negative pole utmost point ear of first electric core extend out by the one end of first electric core body along first direction, the second positive pole utmost point ear and the second negative pole utmost point ear of second electric core extend out by the one end of second electric core body along the second direction, through being connected first positive pole utmost point ear and second positive pole utmost point ear electricity, first negative pole utmost point ear is connected with second negative pole utmost point ear electricity, thereby realize the parallel connection of first electric core and second electric core, and two electrodes of electric core unit are drawn forth the end and can be drawn forth by battery case's homonymy, thereby make things convenient for the equipment of battery.
Drawings
For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views. Wherein:
FIG. 1 is a schematic diagram illustrating one perspective of a battery according to an exemplary embodiment;
FIG. 2 is a schematic diagram illustrating another perspective of a battery according to an exemplary embodiment;
FIG. 3 is an exploded schematic view of a battery according to an exemplary embodiment;
FIG. 4 is a schematic diagram of a battery according to another exemplary embodiment;
fig. 5 is a flow diagram illustrating a method of assembling a battery according to an exemplary embodiment.
The reference numerals are explained below:
10. a first cell; 11. a first cell body; 12. a first positive electrode tab; 13. a first negative electrode tab; 20. a second cell; 21. a second cell body; 22. a second positive electrode tab; 23. a second negative electrode tab; 30. a pole assembly; 50. a battery case; 51. recessing; 511. a raised structure; 52. a first surface; 53. a second surface; 54. a first housing member; 55. a second housing member; 56. a flange structure.
Detailed Description
The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is, therefore, to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.
In the description of the present disclosure, unless otherwise explicitly specified or limited, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" object or "an" object is also intended to mean one of many such objects possible.
The terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.
Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in this context, when an element or feature is referred to as being "on", "under", or "inner", "outer" with respect to another element(s), it can be directly on "," under ", or" inner "," outer "with respect to the other element(s), or indirectly on", "under", or "inner", "outer" with respect to the other element(s) via intervening elements.
Referring to fig. 1 to 3, the battery includes a cell unit and a battery case 50, the cell unit is disposed in the battery case 50, and the cell unit includes: the battery cell comprises a first battery cell 10, wherein the first battery cell 10 comprises a first battery cell body 11, a first positive electrode tab 12 and a first negative electrode tab 13, and the first positive electrode tab 12 and the first negative electrode tab 13 extend out from one end of the first battery cell body 11 along a first direction; the battery cell comprises a second battery cell 20, wherein the first battery cell 10 and the second battery cell 20 are arranged along a first direction, the second battery cell 20 comprises a second battery cell body 21, a second positive electrode tab 22 and a second negative electrode tab 23, and the second positive electrode tab 22 and the second negative electrode tab 23 extend out from one end of the second battery cell body 21 along a second direction; the first positive electrode tab 12 is electrically connected with the second positive electrode tab 22, the first negative electrode tab 13 is electrically connected with the second negative electrode tab 23, and the first direction and the second direction are opposite.
The battery of one embodiment of the present invention includes a cell unit and a battery case 50, and the cell unit is disposed in the battery case 50. The cell unit comprises the first cell 10 and the second cell 20, so as to meet the capacity requirement of the battery, and for the battery with larger capacity requirement, the difficulty of forming the cell can be reduced, so that the performance of the battery is improved. And the first positive pole tab 12 and the first negative pole tab 13 of the first battery cell 10 extend out from one end of the first battery cell body 11 along the first direction, the second positive pole tab 22 and the second negative pole tab 23 of the second battery cell 20 extend out from one end of the second battery cell body 21 along the second direction, through electrically connecting the first positive pole tab 12 with the second positive pole tab 22, the first negative pole tab 13 is electrically connected with the second negative pole tab 23, so as to realize the parallel connection of the first battery cell 10 and the second battery cell 20, and two electrode leading-out ends of the battery cell unit can be led out from the same side of the battery shell 50, so as to facilitate the assembly of the battery.
Note that the battery includes a cell and an electrolyte, and a minimum unit capable of performing an electrochemical reaction such as charge/discharge. The battery cell refers to a unit formed by winding or laminating a stack including a first electrode, a separator, and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. Wherein the polarities of the first electrode and the second electrode can be interchanged.
It should be noted that, the second battery cell 20 and the first battery cell 10 are arranged along the first direction, that is, the second battery cell 20 and the first battery cell 10 may form a left-right arrangement structure, so as to increase the overall length of the battery cell unit, and during the forming process of the independent first battery cell 10 and the independent second battery cell 20, the battery cell with a large forming length may be avoided, so that not only the forming efficiency may be improved, but also the precision after forming may be improved, so as to ensure the usability of the subsequent battery cell unit.
First positive pole utmost point ear 12 and first negative pole utmost point ear 13 extend by the one end of first electric core body 11 along first direction, second positive pole utmost point ear 22 and second negative pole utmost point ear 23 extend by the one end of second electric core body 21 along the second direction, first direction and second direction are two opposite directions, first positive pole utmost point ear 12, first negative pole utmost point ear 13, second positive pole utmost point ear 22 and second negative pole utmost point ear 23 are not full utmost point ear structure, but because first positive pole utmost point ear 12 is connected with second positive pole utmost point ear 22 electricity, first negative pole utmost point ear 13 is connected with second negative pole utmost point ear 23 electricity, consequently also can guarantee that the utmost point ear has sufficient overcurrent capacity, guarantee the security performance that the battery used.
In one embodiment, the first positive tab 12 is disposed opposite to the second positive tab 22, and the first negative tab 13 is disposed opposite to the second negative tab 23, so that the connection between the first positive tab 12 and the second positive tab 22 and the connection between the first negative tab 13 and the second negative tab 23 can be facilitated.
The first positive electrode tab 12 and the second positive electrode tab 22 are arranged oppositely, when the first positive electrode tab 12 is flattened, at least part of the projection of the flattened first positive electrode tab 12 is positioned on the second positive electrode tab 22 along the projection of the flattened second positive electrode tab 22. The first negative pole tab 13 and the second negative pole tab 23 are arranged oppositely, when the first negative pole tab 13 is flattened, at least part of projection of the flattened first negative pole tab 13 is positioned on the second negative pole tab 23 along the projection of the flattened second negative pole tab 23.
The first positive electrode tab 12 and the second positive electrode tab 22 are arranged oppositely, and it can be considered that the end of the first positive electrode tab 12 is directly opposite to the end of the second positive electrode tab 22, at this time, the end of the first positive electrode tab 12 and the end of the second positive electrode tab 22 can be arranged at intervals, the first positive electrode tab 12 and the second positive electrode tab 22 are electrically connected through an adapter sheet or a pole assembly, or the end of the first positive electrode tab 12 and the end of the second positive electrode tab 22 can be butted.
The first positive electrode tab 12 is disposed opposite the second positive electrode tab 22, and it can be considered that a portion of the first positive electrode tab 12 overlaps a portion of the second positive electrode tab 22, such that the first positive electrode tab 12 is electrically connected to the second positive electrode tab 22.
Accordingly, the first negative electrode tab 13 is disposed opposite to the second negative electrode tab 23, and it can be considered that an end of the first negative electrode tab 13 is directly opposite to an end of the second negative electrode tab 23. Or, it may be considered that the portion of the first anode tab 13 overlaps the portion of the second anode tab 23.
In one embodiment, as shown in fig. 2 and 3, the battery further includes: the pole assembly 30, the pole assembly 30 is arranged on the battery shell 50; wherein, first positive pole utmost point ear 12 all is connected with utmost point post subassembly 30 electricity with second positive pole utmost point ear 22, or, first negative pole utmost point ear 13 all is connected with utmost point post subassembly 30 electricity with second negative pole utmost point ear 23 to can make utmost point post subassembly 30 draw forth the end as an electrode, and another electrode draws forth the end and can be formed by battery case 50 or another utmost point post subassembly 30.
In one embodiment, as shown in fig. 2 and 3, there are two pole assemblies 30, the first positive pole tab 12 and the second positive pole tab 22 are electrically connected to one pole assembly 30, and the first negative pole tab 13 and the second negative pole tab 23 are electrically connected to the other pole assembly 30, so that the two pole assemblies 30 can be used as two electrode leading-out terminals of the battery respectively.
In some embodiments, the two pole assemblies 30 are located on the same side of the battery housing 50.
In some embodiments, two pole assemblies 30 may be located on opposite sides of the battery housing 50.
In one embodiment, the battery case 50 includes a steel shell, the first negative electrode tab 13 and the second negative electrode tab 23 are both electrically connected to the steel shell, and the first positive electrode tab 12 and the second positive electrode tab 22 are both electrically connected to the electrode assembly 30, so that the battery case 50 and the electrode assembly 30 can be respectively used as two electrode leading-out terminals of the battery, which is not only simple in structure, but also can reduce the weight of the battery. The corrosion potential of the steel shell is higher, so that the first negative pole lug 13, the second negative pole lug 23 and the steel shell are electrically connected, so that a large amount of corrosion to the steel shell can be avoided, and the safety performance of the battery is further improved.
In one embodiment, the battery case 50 includes an aluminum case, the first positive tab 12 and the second positive tab 22 are both electrically connected to the aluminum case, and the first negative tab 13 and the second negative tab 23 are both electrically connected to the electrode assembly 30, so that the battery case 50 and the electrode assembly 30 can be respectively used as two electrode leading-out terminals of the battery, which is not only simple in structure, but also can reduce the weight of the battery. The aluminum casing has lower corrosion potential, so that the first positive pole lug 12 and the second positive pole lug 22 are electrically connected with the aluminum casing, so that a large amount of corrosion to the aluminum casing can be avoided, and the safety performance of the battery is further improved.
In one embodiment, the battery housing 50 is provided with a recess 51, and the recess 51 can be used for accommodating a pole assembly of another battery, so that when the batteries are grouped, the recess 51 gives way to the pole assembly of another battery, thereby avoiding collision of the pole assembly, and further improving the space utilization rate when the batteries are grouped.
In one embodiment, the post assembly 30 is located outside of the recess 51, i.e., the post assembly 30 is not disposed in the recess 51, the post assembly 30 can be disposed protruding from the battery housing 50, as shown in fig. 2, when the batteries are grouped, the protruding post assembly 30 can be received in the recess of another battery.
In one embodiment, as shown in fig. 1 and fig. 2, the recess 51 is disposed on a side of the battery housing 50 away from the pole assembly 30, so that the recess 51 can reliably receive the pole assembly of another battery, and the connection between the following adjacent batteries can be facilitated, thereby improving the space utilization rate when the batteries are grouped.
In one embodiment, the recess 51 is at least partially overlapped with the post assembly 30 along the orthographic projection of the battery housing 50 on the surface where the post assembly 30 is arranged, that is, the recess 51 is at least partially overlapped with the projection of the post assembly 30 on the surface perpendicular to the battery housing 50, so that when the batteries are grouped, the two batteries can be aligned with each other, the post assembly of the other battery can be reliably accommodated in the recess 51, the consistency of battery processing is ensured, and the battery processing is convenient.
It should be noted that the specific structure of the recess 51 is not limited, as long as it can accommodate the pole assembly of another battery.
In one embodiment, as shown in fig. 4, a recess 51 is formed on the battery housing 50, and the pole assembly 30 is located in the recess 51, so that the pole assembly 30 can be prevented or reduced from protruding out of the battery housing 50, and the pole assembly can be prevented from occurring between adjacent batteries to affect the space utilization of the battery pack.
In one embodiment, the battery case 50 is provided with a recess 51, and the recess 51 is used to be connected to a battery case, so that the battery case 50 is connected to the battery case through the recess 51 when the batteries are grouped, thereby improving the mounting stability of the batteries.
It should be noted that the cell unit is composed of the first cell 10 and the second cell 20, and the recess 51 may be located in the middle of the battery case 50. The concave 51 for receiving the pole assembly of another battery, the concave 51 for arranging the pole assembly 30 of the battery, and the concave 51 for connecting with the battery box body may be different, and in some embodiments, the arrangement position and the specific structure of the concave may not be the same, and are not limited herein as long as the use requirement is met.
In one embodiment, the opposite ends of the recess 51 penetrate the opposite sides of the battery case 50, which not only has a simple structure and is convenient for molding, but also facilitates the subsequent formation of a fit with other structures.
In conjunction with the depression 51 shown in fig. 3, the depression 51 may be used to receive the post assembly of another battery, and a raised structure 511 may be formed in the depression 51 at the same time as the depression 51 is stamped.
In one embodiment, as shown in fig. 1 and 2, the battery case 50 includes two opposing first surfaces 52 and four second surfaces 53 disposed around the first surfaces 52, the first surfaces 52 having an area larger than that of the second surfaces 53; the pole assembly 30 is disposed on the first surface 52, so that the pole assembly 30 can have a reliable supporting surface, thereby ensuring the stability of the pole assembly 30.
It should be noted that the two opposing first surfaces 52 are large surfaces of the battery case 50, the four second surfaces 53 are small surfaces of the battery case 50, the four second surfaces 53 include two pairs of small surfaces, i.e., a first pair of small surfaces extending along the length direction of the battery case 50, and a second pair of small surfaces extending along the width direction of the battery case 50, and the areas of the first pair of small surfaces are larger than the areas of the second pair of small surfaces, but smaller than the areas of the large surfaces.
In one embodiment, there are two pole assemblies 30, the first positive pole tab 12 and the second positive pole tab 22 are electrically connected to one pole assembly 30, and the first negative pole tab 13 and the second negative pole tab 23 are electrically connected to the other pole assembly 30, so that the two pole assemblies 30 can be respectively used as two electrode terminals of the battery.
In one embodiment, as shown in fig. 1, two pole assemblies 30 are disposed on the same first surface 52, which not only facilitates installation and improves assembly efficiency, but also ensures that the pole assembly 30 has a reliable supporting surface, thereby ensuring stability of the pole assembly 30.
The pole assembly 30 is located in the middle of the first surface 52, avoiding the problem that the pole assembly 30 is disposed at the end, resulting in a long electrical connection path between the batteries.
In certain embodiments, it is not excluded that two pole assemblies 30 are respectively disposed on the two first surfaces 52.
In some embodiments, the battery housing 50 is provided with a recess 51, and the recess 51 can be used to receive the post assembly of another battery, in which case, one first surface 52 of the battery housing 50 can be provided with the post assembly 30, and the other first surface 52 of the battery housing 50 can be provided with the recess 51.
In some embodiments, the battery housing 50 is provided with a recess 51, and the pole assembly 30 is located in the recess 51, i.e., both the recess 51 and the pole assembly 30 are provided on one first surface 52 of the battery housing 50.
In some embodiments, the battery case 50 is provided with a recess 51, and the recess 51 is used for connecting with a battery case, and in this case, the recess 51 may be provided on a second surface 53 of the battery case 50. Of course, it is not excluded that the recess 51 may be provided on one first surface 52 of the battery case 50.
In one embodiment, as shown in fig. 3, the battery case 50 includes: a first housing piece 54; and a second housing member 55, wherein the second housing member 55 is connected with the first housing member 54 to enclose the cell unit. The first housing part 54 and the second housing part 55 are arranged independently, so that the installation of the battery cell unit can be facilitated, and the processing is also convenient.
In some embodiments, the first housing piece 54 and the second housing piece 55 may each form a receiving cavity, and after the first housing piece 54 and the second housing piece 55 are butted, the cell unit is located in the cavity formed by the two receiving cavities.
In some embodiments, the first housing part 54 is a flat plate, the second housing part 55 is formed with a containing cavity, the cell unit is located in the containing cavity, the flat plate can facilitate subsequent connection, and the processing difficulty is low.
In one embodiment, as shown in fig. 1, the peripheral edge of the battery housing 50 is provided with a flange structure 56, the flange structure 56 may be used for positioning of the battery pack, or the flange structure 56 may be used for heat conduction. The first and second housing pieces 54, 55 may be welded such that the first and second housing pieces 54, 55 form a flange structure 56. The flange structure 56 can be considered as being formed by welding the flange edge of the first housing piece 54 and the flange edge of the second housing piece 55.
An embodiment of the present invention further provides a method for assembling a battery, referring to fig. 5, the method for assembling a battery includes:
s101, connecting the first cell 10 and the second cell 20 in parallel;
s103, enclosing the first battery cell 10 and the second battery cell 20 connected in parallel in the battery case 50, so that the first positive electrode tab 12 and the first negative electrode tab 13 of the first battery cell 10 extend from one end of the first battery cell body 11 of the first battery cell 10 along the first direction, the second positive electrode tab 22 and the second negative electrode tab 23 of the second battery cell 20 extend from one end of the second battery cell body 21 of the second battery cell 20 along the second direction, and the first battery cell 10 and the second battery cell 20 are enclosed in the battery case 50 along the first direction;
wherein, the first direction and the second direction are two opposite directions.
In the assembly method of the battery according to the embodiment of the invention, the first battery core 10 and the second battery core 20 which are connected in parallel are enclosed in the battery shell 50, so that the capacity requirement of the battery is met, and the difficulty in forming the battery cores of the battery with higher capacity requirement can be reduced, thereby improving the performance of the battery. And the first positive pole tab 12 and the first negative pole tab 13 of the first battery cell 10 extend out from one end of the first battery cell body 11 along the first direction, the second positive pole tab 22 and the second negative pole tab 23 of the second battery cell 20 extend out from one end of the second battery cell body 21 along the second direction, through electrically connecting the first positive pole tab 12 with the second positive pole tab 22, the first negative pole tab 13 is electrically connected with the second negative pole tab 23, so as to realize the parallel connection of the first battery cell 10 and the second battery cell 20, and two electrode leading-out ends of the battery cell unit can be led out from the same side of the battery shell 50, so as to facilitate the assembly of the battery.
In one embodiment, connecting the first cell 10 and the second cell 20 in parallel includes: arranging a first cell 10 and a second cell 20 in a first direction such that a first positive tab 12 and a first negative tab 13 are arranged opposite to a second positive tab 22 and a second negative tab 23, respectively; the first positive electrode tab 12 is electrically connected with the second positive electrode tab 22, and the first negative electrode tab 13 is electrically connected with the second negative electrode tab 23, so that the first battery cell 10 and the second battery cell 20 are connected in parallel, and two electrode leading-out ends of the battery are conveniently led out subsequently.
In one implementation, enclosing the first cell 10 and the second cell 20 connected in parallel within the battery casing 50 includes: connecting the first cell 10 and the second cell 20 in parallel to the first housing part 54 of the battery housing 50; the second housing part 55 of the battery housing 50 is connected in a sealing manner to the first housing part 54. The first housing member 54 may serve as a support structure during the connection of the first battery cell 10 and the second battery cell 20, thereby facilitating the connection of the first battery cell 10 and the second battery cell 20.
In one embodiment, the method for assembling a battery further comprises: before the first electric core 10 and the second electric core 20 which are connected in parallel are sealed in the battery shell 50, the first positive electrode tab 12 and the second positive electrode tab 22 are connected to the pole assembly 30 of the battery shell 50, that is, the first positive electrode tab 12 and the second positive electrode tab 22 are connected to the pole assembly 30 of the first shell member 54, so that the welding mechanism can be welded by the side where the first positive electrode tab 12 and the second positive electrode tab 22 are located, and the welding mechanism can avoid overlarge welding energy to damage the pole assembly 30 and is convenient to weld relative to the side where the pole assembly 30 is located.
Specifically, the first battery cell 10 and the second battery cell 20 are placed on the first casing member 54, the first positive electrode tab 12 and the second positive electrode tab 22 are welded to each other and are welded to the pole assembly 30, and then the second casing member 55 is connected to the first casing member 54.
In one embodiment, the method for assembling a battery further comprises: before the first cell 10 and the second cell 20 connected in parallel are enclosed in the battery case 50, the first negative tab 13 and the second negative tab 23 are connected to the pole assembly 30 of the battery case 50.
In one embodiment, the first and second positive tabs 12 and 22 are electrically connected to the battery case 50 while the first and second negative tabs 13 and 23 are connected to the pole assembly 30 of the battery case 50; or, when the first negative electrode tab 13 and the second negative electrode tab 23 are connected to the terminal assembly 30 of the battery case 50, the first positive electrode tab 12 and the second positive electrode tab 22 are electrically connected to the battery case 50, so that the battery case 50 and the terminal assembly 30 can be respectively used as two electrode leading-out ends of the battery.
In one embodiment, the first positive electrode tab 12 and the second positive electrode tab 22 are connected to one electrode assembly 30, the first negative electrode tab 13 and the second negative electrode tab 23 are connected to the other electrode assembly 30, and the two electrode assemblies 30 are located on the same large surface of the battery shell 50, so that the installation is convenient, the assembly efficiency can be improved, and the electrode assemblies 30 can be guaranteed to have a reliable supporting surface, thereby ensuring the stability of the electrode assemblies 30.
Specifically, the first cell 10 and the second cell 20 are placed on the first casing member 54, the first positive electrode tab 12 and the second positive electrode tab 22 are welded to each other and are welded to the pole assembly 30, the first negative electrode tab 13 and the second negative electrode tab 23 are welded to each other and are welded to the pole assembly 30, and then the second casing member 55 is connected to the first casing member 54. The order of attaching the first positive electrode tab 12 and the second positive electrode tab 22 to one electrode assembly 30 and attaching the first negative electrode tab 13 and the second negative electrode tab 23 to the other electrode assembly 30 is not limited.
In one embodiment, the first negative electrode tab 13 and the second negative electrode tab 23 are ultrasonically welded, the first positive electrode tab 12 and the second positive electrode tab 22 are ultrasonically welded, and then the first negative electrode tab 13 and the second negative electrode tab 23 are connected by laser welding, so that the welding quality of the first negative electrode tab 13 and the second negative electrode tab 23 can be ensured, and can avoid the problem that the welded first negative pole tab 13 and second negative pole tab 23 and pole assembly 30 damage the first negative pole tab 13 and second negative pole tab 23 due to excessive energy, correspondingly, the ultrasonic welding of the first positive pole tab 12 and second positive pole tab 22 can not only ensure the welding quality of the first positive pole tab 12 and second positive pole tab 22, and the damage to the first positive electrode tab 12 and the second positive electrode tab 22 caused by excessive energy in the welding of the first positive electrode tab 12 and the second positive electrode tab 22 and the electrode assembly 30 after welding can be avoided. Ultrasonic welding may be considered pre-welding, while laser welding may ensure reliable welding of the tabs to the post assembly 30.
In one embodiment, the battery assembly method is used to form the battery, and the specific structure of the battery in this embodiment may refer to the specific structure of the battery, which is not described herein again.
An embodiment of the invention also provides a battery pack comprising the battery.
The battery pack according to one embodiment of the present invention includes a battery including a cell unit disposed in a battery case 50 and the battery case 50. The cell unit comprises the first cell 10 and the second cell 20, so as to meet the capacity requirement of the battery, and for the battery with larger capacity requirement, the difficulty of forming the cell can be reduced, so that the performance of the battery is improved. And the first positive pole tab 12 and the first negative pole tab 13 of the first battery cell 10 extend out from one end of the first battery cell body 11 along the first direction, the second positive pole tab 22 and the second negative pole tab 23 of the second battery cell 20 extend out from one end of the second battery cell body 21 along the second direction, through electrically connecting the first positive pole tab 12 with the second positive pole tab 22, the first negative pole tab 13 is electrically connected with the second negative pole tab 23, so as to realize the parallel connection of the first battery cell 10 and the second battery cell 20, and two electrode leading-out ends of the battery cell unit can be led out from the same side of the battery shell 50, so as to facilitate the assembly of the battery.
In one embodiment, the battery pack is a battery module or a battery pack.
The battery module includes a plurality of batteries, and the battery module may further include an end plate and a side plate for fixing the plurality of batteries.
It should be noted that a plurality of batteries can be arranged in the battery box after forming the battery module, and the plurality of batteries can be fixed through the end plate and the side plate. A plurality of batteries can directly set up in the battery box, need not to pack a plurality of batteries promptly, and at this moment, can get rid of end plate and curb plate.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice in the art to which the disclosure pertains. It is intended that the specification and example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (14)
1. A battery comprising a cell unit and a battery case (50), the cell unit being disposed within the battery case (50), the cell unit comprising:
the battery comprises a first battery cell (10), wherein the first battery cell (10) comprises a first battery cell body (11), a first positive electrode tab (12) and a first negative electrode tab (13), and the first positive electrode tab (12) and the first negative electrode tab (13) extend out from one end of the first battery cell body (11) along a first direction;
the first battery cell (10) and the second battery cell (20) are arranged along the first direction, the second battery cell (20) comprises a second battery cell body (21), a second positive electrode tab (22) and a second negative electrode tab (23), and the second positive electrode tab (22) and the second negative electrode tab (23) extend out from one end of the second battery cell body (21) along a second direction;
wherein, first positive pole utmost point ear (12) with second positive pole utmost point ear (22) electricity is connected, first negative pole utmost point ear (13) with second negative pole utmost point ear (23) electricity is connected, first direction with the second direction is two opposite directions.
2. The battery according to claim 1, wherein the first positive tab (12) is disposed opposite the second positive tab (22), and the first negative tab (13) is disposed opposite the second negative tab (23).
3. The battery of claim 1, further comprising:
a pole assembly (30), the pole assembly (30) being disposed in the battery housing (50);
wherein, first positive pole utmost point ear (12) with second positive pole utmost point ear (22) all with utmost point post subassembly (30) electricity is connected, or, first negative pole utmost point ear (13) with second negative pole utmost point ear (23) all with utmost point post subassembly (30) electricity is connected.
4. The battery according to claim 3, wherein the battery housing (50) comprises a steel shell, the first negative tab (13) and the second negative tab (23) are both electrically connected to the steel shell, and the first positive tab (12) and the second positive tab (22) are both electrically connected to the pole assembly (30);
or, battery case (50) include the aluminum hull, first positive utmost point ear (12) with second positive utmost point ear (22) all with the aluminum hull electricity is connected, first negative pole utmost point ear (13) with second negative pole utmost point ear (23) all with utmost point post subassembly (30) electricity is connected.
5. A battery according to claim 3, characterized in that the battery housing (50) is provided with a recess (51), said recess (51) being adapted to receive a pole assembly of another battery.
6. The battery according to claim 5, characterized in that the pole assembly (30) is located outside the range of the recess (51);
wherein the recess (51) is arranged on a side of the battery housing (50) facing away from the pole assembly (30).
7. The battery according to claim 6, wherein an orthographic projection of the recess (51) on a surface along the battery housing (50) where the pole assembly (30) is disposed coincides with at least part of the pole assembly (30).
8. The battery according to any one of claims 3 to 7, wherein the battery case (50) comprises two opposing first surfaces (52) and four second surfaces (53) disposed around the first surfaces (52), the first surfaces (52) having an area larger than the second surfaces (53);
wherein the pole assembly (30) is disposed on the first surface (52).
9. The battery according to claim 8, characterized in that the number of pole assemblies (30) is two, the first positive pole tab (12) and the second positive pole tab (22) are both electrically connected with one pole assembly (30), and the first negative pole tab (13) and the second negative pole tab (23) are both electrically connected with the other pole assembly (30);
wherein the two pole assemblies (30) are arranged on the same first surface (52).
10. A method of assembling a battery, comprising:
connecting a first cell (10) and a second cell (20) in parallel;
enclosing the first battery cell (10) and the second battery cell (20) connected in parallel in a battery case (50), such that a first positive electrode tab (12) and a first negative electrode tab (13) of the first battery cell (10) extend from one end of a first cell body (11) of the first battery cell (10) along a first direction, a second positive electrode tab (22) and a second negative electrode tab (23) of the second battery cell (20) extend from one end of a second cell body (21) of the second battery cell (20) along a second direction, and the first battery cell (10) and the second battery cell (20) are enclosed in the battery case (50) along the first direction;
wherein the first direction and the second direction are two opposite directions.
11. The method of assembling a battery according to claim 10, wherein enclosing the first cell (10) and the second cell (20) connected in parallel within the battery housing (50) comprises:
-connecting the first electrical core (10) and the second electrical core (20) in parallel on a first housing part (54) of the battery housing (50);
the second housing part (55) of the battery housing (50) is connected in a sealing manner to the first housing part (54).
12. The method of assembling a battery according to claim 10 or 11, further comprising:
prior to enclosing the first cell (10) and the second cell (20) connected in parallel within the battery casing (50),
connecting the first positive electrode tab (12) and the second positive electrode tab (22) to a terminal assembly (30) of the battery housing (50); or
And connecting the first negative electrode tab (13) and the second negative electrode tab (23) to a pole assembly (30) of the battery shell (50).
13. The method for assembling a battery according to claim 12, wherein the first negative electrode tab (13) and the second negative electrode tab (23) are ultrasonically welded, the first positive electrode tab (12) and the second positive electrode tab (22) are ultrasonically welded, and then the first positive electrode tab and the second positive electrode tab are connected by laser welding with the electrode assembly (30).
14. The method of assembling a battery according to claim 12, wherein the first positive tab (12) and the second positive tab (22) are attached to one of the pole assemblies (30) and the first negative tab (13) and the second negative tab (23) are attached to the other of the pole assemblies (30), the two pole assemblies (30) being located on the same large surface of the battery housing (50).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210344031.3A CN114639926A (en) | 2022-03-31 | 2022-03-31 | Battery and method for assembling battery |
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| CN202210344031.3A CN114639926A (en) | 2022-03-31 | 2022-03-31 | Battery and method for assembling battery |
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