CN220753579U - Battery with multiple battery cells - Google Patents
Battery with multiple battery cells Download PDFInfo
- Publication number
- CN220753579U CN220753579U CN202322133794.6U CN202322133794U CN220753579U CN 220753579 U CN220753579 U CN 220753579U CN 202322133794 U CN202322133794 U CN 202322133794U CN 220753579 U CN220753579 U CN 220753579U
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- battery
- shell
- pole
- cover body
- polar
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- 238000001746 injection moulding Methods 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 11
- 238000003466 welding Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- QSNQXZYQEIKDPU-UHFFFAOYSA-N [Li].[Fe] Chemical compound [Li].[Fe] QSNQXZYQEIKDPU-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007709 nanocrystallization Methods 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model belongs to the technical field of batteries, and relates to a multi-cell battery which comprises a shell, a first pole, a second pole and a cell group; the housing has a cavity; the shell wall of the shell is provided with at least one conductive part; the parts except at least two conductive parts in the shell wall of the shell are connecting parts; each conducting part is arranged in an insulating way with the connecting part; the battery cell group comprises a plurality of battery cells, the tab at the head end of the battery cell group in the serial direction is connected with the first polarity end of the battery, and the tab at the tail end of the battery cell group in the serial direction is connected with the second polarity end of the battery. The utility model can arrange a plurality of electric cores in the shell of the battery, and the electric cores are connected in series, thereby reducing the number of times of battery serial connection and further reducing the space required by battery serial connection.
Description
Technical Field
The utility model belongs to the technical field of batteries, and particularly relates to a battery with multiple battery cells.
Background
In recent years, with the development of new energy, the lead-acid battery on the original two-wheeled electric vehicle has short cycle life, low energy density and the like, and can not meet the demands of part of customers. Batteries of two-wheeled electric vehicles have begun to gradually transition from lead-acid batteries to lithium ion batteries, however, electric vehicles typically employ a 48V pack design for their charge safety and their manufacturing cost. The voltage of the existing single battery core of the lithium iron is 3.2V, and the voltage of the ternary single battery core is 3.7V, so that more than ten batteries can be connected in series to meet the voltage requirement of the electric vehicle, and a 48V small battery pack is assembled.
However, the structure of connecting more than ten batteries in series can occupy a part of the volume space of the electric vehicle, so that the utilization rate of the volume space is greatly reduced. Meanwhile, the electric vehicle is limited by the space of the electric vehicle, and a plurality of square aluminum shell battery cores are difficult to arrange outside.
Disclosure of Invention
The utility model aims at: aiming at the defects of the prior art, the battery with multiple battery cells is provided, which aims at reasonably utilizing the occupied space and improving the compactness of the structure.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
a multi-cell battery comprising:
a housing having a cavity; the shell wall of the shell is provided with at least one conductive part, and the part except at least two conductive parts in the shell wall of the shell is a connecting part; each conducting part is arranged in an insulating way with the connecting part;
the battery cell group is arranged in the cavity and is provided with at least two battery cells; at least two battery cells are sequentially arranged along a first direction; the polarities of the two lugs of the two adjacent battery cells positioned on the same side are opposite, and the two lugs of the two adjacent battery cells positioned on the same side are connected through the conductive part, wherein the first direction is the length direction of the shell or the width direction of the shell;
the tab at the head end of the battery cell group in the serial direction is connected with the first polarity end of the battery, and the tab at the tail end of the battery cell group in the serial direction is connected with the second polarity end of the battery.
Preferably, each conductive part and each connecting part are connected in a nano injection molding mode.
Preferably, the first polar end of the battery is a first polar column, the second polar end of the battery is a connecting part, the connecting part is provided with a first polar column mounting hole, the first polar column is arranged at the first polar column mounting hole, and the first polar column is in insulation and sealing connection with the connecting part.
Preferably, the housing comprises a shell and a cover, the shell is provided with an opening, and the cover is arranged at the opening; the cover body is welded with the shell, and the cavity is formed between the cover body and the shell; the first pole mounting hole is arranged on the cover body; when the number of the battery cells is even, the negative electrode of the battery is the cover body; when the number of the battery cells is odd, the negative electrode of the battery is the shell.
Preferably, the second polar end of the battery is a first polar post, the second polar end of the battery is a second polar post, and the connecting part is provided with a second polar post mounting hole and a first polar post mounting hole; the first pole is arranged at the first pole mounting hole, and the first pole is connected with the connecting part in an insulating and sealing way; the second pole is arranged at the second pole mounting hole, and the second pole is connected with the connecting part in an insulating and sealing way.
Preferably, the housing comprises a shell and a cover, the shell is provided with an opening, and the cover is arranged at the opening; the cover body is welded with the shell, and the cavity is formed between the cover body and the shell; when the number of the battery cells is even, the first pole mounting holes and the second pole mounting holes are arranged on the cover body; when the number of the battery cells is odd, the first pole mounting holes and the second pole mounting holes are respectively formed in the cover body and the shell.
Preferably, the first pole and the connecting part are connected in a nano injection molding mode.
Preferably, the first pole and/or the second pole are/is connected with the connecting part in a nano injection molding mode.
Preferably, two tabs of two adjacent battery cells positioned on the same side are connected with the conductive part in a laser welding mode.
Preferably, one end of each of the two tabs of the battery core, which is connected with the conductive part, is flattened or kneaded to form a connection surface attached to the wall of the housing.
The utility model has the beneficial effects that the technical scheme is that the plurality of battery cores are arranged in the shell of the battery and are connected in series, so that the number of times of battery serial connection is reduced, and the space required by battery serial connection is reduced.
Drawings
Features, advantages, and technical effects of exemplary embodiments of the present utility model will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of an embodiment of a multi-cell battery according to the present utility model.
Fig. 2 is a schematic structural view of a casing of a multi-cell battery according to the present utility model.
Fig. 3 is a top view of the housing of the multi-cell battery of the present utility model.
Fig. 4 is a schematic structural diagram of another embodiment of a multi-cell battery of the present utility model.
Wherein reference numerals are as follows:
100-a housing; 101-cavity; 102-a conductive portion; 103-a connection; 1-a cover body; 2-a housing; 3-a first pole mounting hole; 4-a second post mounting hole; 5-explosion-proof holes; 6-filling holes; 300-cell group; 301-cell; 400-a first pole; 500-second pole.
Detailed Description
Certain terms are used throughout the description and claims to refer to particular components. Those of skill in the art will appreciate that a hardware manufacturer may refer to the same component by different names. The description and claims do not take the form of an element differentiated by name, but rather by functionality. As used throughout the specification and claims, the word "comprise" is an open-ended term, and thus should be interpreted to mean "include, but not limited to. By "substantially" is meant that within an acceptable error range, a person skilled in the art can solve the technical problem within a certain error range, substantially achieving the technical effect.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
The present utility model will be described in further detail below with reference to fig. 1, but is not limited thereto.
Embodiment one
The present utility model will be described in further detail below with reference to fig. 1 to 4, but is not limited thereto.
As shown in fig. 1, in one embodiment of the present utility model, a multi-cell battery includes a housing 100 and a cell stack 300: the housing 100 has a cavity 101; the wall of the housing 100 has at least one conductive portion 102, and a portion of the wall of the housing 100 other than the at least two conductive portions 102 is a connection portion 103; each conductive part 102 is arranged in an insulating way with the connecting part 103;
the battery cell group 300 is arranged in the cavity 101, and the battery cell group 300 is provided with at least two battery cells 301; at least two cells 301 are sequentially arranged along the first direction; the polarities of the two tabs of the two adjacent electric cores 301 positioned on the same side are opposite, and the two tabs of the two adjacent electric cores 301 positioned on the same side are connected through the conductive part 102, wherein the first direction is the length direction of the shell 100 or the width direction of the shell 100;
the tab at the head end of the battery cell group 300 in the serial direction is connected to the first polarity end of the battery, and the tab at the tail end of the battery cell group 300 in the serial direction is connected to the second polarity end of the battery.
It should be noted that, the tab of the battery cell 301 extends from two opposite ends of the battery cell 301; the first polar end of the battery is a positive electrode, and the second polar end of the battery is a negative electrode.
According to the technical scheme, the multiple electric cores are sequentially arranged along the first direction of the length direction of the shell or the width direction of the shell, the polarities of the two lugs of each two adjacent electric cores 301 positioned on the same side are required to be opposite, and the two lugs of each two adjacent electric cores 301 positioned on the same side are connected through the conductive part 102, so that the purpose of connecting the multiple electric cores 301 in series is achieved; and the tab at the leading end of the winding group 300 in the serial direction is connected to the first polarity end of the battery, and the tab at the trailing end of the battery cell group 300 in the serial direction is connected to the second polarity end of the battery. Compared with the conventional battery pack formed by serially connecting the batteries, the battery pack formed by serially connecting the batteries reduces the number of times of serially connecting the batteries, thereby reducing the space required by a serial structure for serially connecting the batteries and further reducing the use space of the battery pack in the whole vehicle.
For example: comparing with a 48V electric vehicle, and under the same voltage, the space occupation ratio of the electric vehicle is the same; the voltage of the conventional ternary unit cell is 3.7V, so 13 ternary unit cells need to be connected in series, but in the unit cell of this embodiment, 3 electric cores 301 are connected in series, and the voltage of the unit cell is about 11V, so 4 to 5 unit cells need to be connected in series.
In some embodiments, referring to fig. 1 and 4, two tabs of two adjacent electric cores 301 located on the same side are connected to the conductive portion 102 by means of laser welding, so that the two tabs of two adjacent electric cores 301 located on the same side are firmly connected to the conductive portion 102, and the connection is convenient. Of course, the two tabs of the adjacent two battery cells 301 located on the same side may be connected to the conductive portion 102 by bolts, and the specific connection mode is not limited.
In some embodiments, in order to facilitate insulation and sealing between the conductive parts 102 and the connection parts 103, each conductive part 102 and the connection parts 103 are connected by nano injection molding. Specifically, the conducting portion 102 and/or the connecting portion 103 are subjected to nanocrystallization, so that a portion of the surface of the conducting portion 102 for connecting with the connecting portion 103 and/or a portion of the surface of the connecting portion 103 for connecting with the conducting portion 102 are provided with nanopores, then the conducting portion 102 and the connecting portion 103 are both arranged in an injection mold, a molten plastic material is injected into the injection mold, and the conducting portion 102 and the connecting portion 103 are connected together, wherein the molten plastic material penetrates into the nanopores. The conductive part 102 and the connecting part 103 are connected in a nano injection molding mode, and the conductive part 102 and the connecting part 103 are firmly connected and are connected quickly.
In some embodiments, referring to fig. 4, the first polar end of the battery is a first pole 400, the second polar end of the battery is a connection 103, that is, the tab at the head end of the winding in the serial direction is connected to the first pole 400, and the tab at the tail end of the battery cell group 300 in the serial direction is connected to the connection 103;
continuing, the connection portion 103 is provided with a first pole mounting hole 3; the first pole 400 is disposed at the first pole mounting hole 3, and the first pole 400 is connected with the connection part 103 in an insulating and sealing manner.
Specifically, the housing 100 includes a case 2 and a cover 1, the case 2 having an opening, the cover 1 being provided at the opening; it should be noted that, the center line of the opening is disposed perpendicular to the first direction, and the housing 2 may have one opening or two openings, and accordingly, the cover may have one or two openings, and in this embodiment, one opening is disposed, and accordingly, one cover is disposed;
subsequently, the cover body 1 and the shell 2 are welded, and a cavity 101 is formed between the cover body 1 and the shell 2; here, the cover 1 and the case 2 may be welded in various manners, for example, laser welding;
subsequently, the first pole mounting hole 3 is arranged on the cover body 1; when the number of the battery cells 301 is even, the negative electrode of the battery is the cover 1; when the number of the battery cells 301 is an odd number, the negative electrode of the battery is the case 2; it should be noted that, when the number of the battery cells 301 is even, the tabs at the head end and the tabs at the tail end of the battery cell group 300 in the serial direction are located on the same side, and accordingly, for convenience of connection, the first polarity end and the second polarity end of the battery are designed to be located on the same side, that is, are designed to be on the same cover 1; when the number of the battery cells 301 is odd, the tabs at the head end and the tabs at the tail end of the battery cell group 300 in the serial direction are located at different sides, and accordingly, for convenience of connection, the first polarity end and the second polarity end of the battery are designed to be located at different sides, that is, one is designed to be disposed on the cover 1 and the other is designed to be disposed on the case 2, of course, for the case 100 in which two covers 1 are disposed, respectively, the two covers 1 are designed.
Further, in order to facilitate connection between the first pole 400 and the connection portion 103, the first pole 400 is connected with the connection portion 103 by nano injection molding, specifically, the first pole 400 is connected with the cover 1 by nano injection molding, and the first pole 400 is connected with the cover 1 firmly and fast. For the connection of the first pole 400 and the cover 1 by nano injection molding, reference may be made to the above-mentioned method of nano injection molding connection between the conductive portion 102 and the connection portion 103.
In other embodiments, referring to fig. 1, 2 and 3, the second polar end of the battery is the first pole 400, and the second polar end of the battery is the second pole 500, that is, the tab at the head end of the winding group in the serial direction is connected to the first pole 400, and the tab at the tail end of the battery cell group 300 in the serial direction is connected to the second pole 500;
continuing, the connection portion 103 is provided with a second pole mounting hole 4 and a first pole mounting hole 3; the first pole 400 is arranged at the first pole mounting hole 3, and the first pole 400 is connected with the connecting part 103 in an insulating and sealing way; the second post 500 is disposed at the second post mounting hole 4, and the second post 500 is connected with the connection part 103 in an insulating and sealing manner.
Specifically, the housing 100 includes a case 2 and a cover 1, the case 2 having an opening, the cover 1 being provided at the opening; the cover body 1 and the shell 2 are welded, and a cavity 101 is formed between the cover body 1 and the shell 2; when the number of the battery cells 301 is even, the first pole mounting holes 3 and the second pole mounting holes 4 are both arranged on the cover 1; when the number of the battery cells 301 is an odd number, the first pole mounting holes 3 and the second pole mounting holes 4 are respectively provided in the cover 1 and the housing 2.
Further, the first pole 400 and/or the second pole 500 are/is connected to the connection portion 103 by nano injection molding, that is, one case is: the first pole 400 is connected with the connecting portion 103 by nano injection molding, and the second pole 500 is insulated and sealed with the connecting portion 103 by other existing connecting methods, which are not described herein; another case is: the first pole 400 and the connecting portion 103 achieve the purposes of insulation and sealing by other existing connecting modes, the specific existing connecting modes are not described herein, and the second pole 500 and the connecting portion 103 are connected by nano injection molding; yet another case is: the first pole 400 and the second pole 500 are connected with the connecting part 103 in a nano injection molding mode.
In some embodiments, as shown in fig. 3, the cover 1 is provided with a blast hole 5; the explosion proof hole 5 is communicated with the inner cavity 101. The safety of use can be effectively improved through the pressure release effect of the explosion-proof hole 5, and the occurrence probability of disasters is reduced.
In some embodiments, as shown in fig. 3, the cover 1 is provided with a liquid injection hole 6. This structure can facilitate the injection of electrolyte into the housing 100 from the injection hole.
In some embodiments, the cell 301 may be a wound cell or a laminated cell. In addition, the multi-cell battery may be a sodium ion battery or a lithium ion battery or a solid state battery or a gel state battery.
Variations and modifications of the above embodiments will occur to those skilled in the art to which the utility model pertains from the foregoing disclosure and teachings. Therefore, the present utility model is not limited to the above-described embodiments, but is intended to be capable of modification, substitution or variation in light thereof, which will be apparent to those skilled in the art in light of the present teachings. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present utility model in any way.
Claims (10)
1. A battery of multiple cells, characterized in that: comprising the following steps:
-a housing (100), the housing (100) having a cavity (101); the shell wall of the shell (100) is provided with at least one conductive part (102), and the part except at least two conductive parts (102) in the shell wall of the shell (100) is a connecting part (103); each conducting part (102) and the connecting part (103) are arranged in an insulating way;
a battery cell group (300), wherein the battery cell group (300) is arranged in the cavity (101), and the battery cell group (300) is provided with at least two battery cells (301); at least two electric cores (301) are sequentially arranged along a first direction; the polarities of two lugs of two adjacent electric cores (301) positioned on the same side are opposite, and the two lugs of two adjacent electric cores (301) positioned on the same side are connected through the conductive part (102), wherein the first direction is the length direction of the shell (100) or the width direction of the shell (100);
the tab at the head end of the battery cell group (300) in the serial direction is connected with the first polarity end of the battery, and the tab at the tail end of the battery cell group (300) in the serial direction is connected with the second polarity end of the battery.
2. The multi-cell battery of claim 1, wherein: each conducting part (102) and each connecting part (103) are connected in a nano injection molding mode.
3. The multi-cell battery of claim 1, wherein: the first polar end of the battery is a first polar column (400), the second polar end of the battery is a connecting portion (103), the connecting portion (103) is provided with a first polar column mounting hole (3), the first polar column (400) is arranged at the first polar column mounting hole (3), and the first polar column (400) is connected with the connecting portion (103) in an insulating and sealing mode.
4. A multi-cell battery as defined in claim 3, wherein: the shell (100) comprises a shell (2) and a cover body (1), wherein the shell (2) is provided with an opening, and the cover body (1) is arranged at the opening; the cover body (1) and the shell (2) are welded, and the cavity (101) is formed between the cover body (1) and the shell (2); the first pole mounting hole (3) is arranged on the cover body (1); when the number of the electric cores (301) is even, the negative electrode of the battery is the cover body (1); when the number of the electric cores (301) is odd, the negative electrode of the battery is the shell (2).
5. The multi-cell battery of claim 1, wherein: the second polar end of the battery is a first polar column (400), the second polar end of the battery is a second polar column (500), and the connecting part (103) is provided with a second polar column mounting hole (4) and a first polar column mounting hole (3); the first pole (400) is arranged at the first pole mounting hole (3), and the first pole (400) is connected with the connecting part (103) in an insulating and sealing way; the second pole (500) is arranged at the second pole mounting hole (4), and the second pole (500) is connected with the connecting part (103) in an insulating and sealing way.
6. The multi-cell battery of claim 5, wherein: the shell (100) comprises a shell (2) and a cover body (1), wherein the shell (2) is provided with an opening, and the cover body (1) is arranged at the opening; the cover body (1) and the shell (2) are welded, and the cavity (101) is formed between the cover body (1) and the shell (2); when the number of the electric cores (301) is even, the first pole mounting holes (3) and the second pole mounting holes (4) are arranged on the cover body (1); when the number of the electric cores (301) is odd, the first pole mounting holes (3) and the second pole mounting holes (4) are respectively arranged on the cover body (1) and the shell body (2).
7. A multi-cell battery as defined in claim 3, wherein: the first pole (400) is connected with the connecting part (103) in a nano injection molding mode.
8. The multi-cell battery of claim 5, wherein: the first pole (400) and/or the second pole (500) are/is connected with the connecting part (103) in a nano injection molding mode.
9. The multi-cell battery of claim 1, wherein: two lugs of two adjacent battery cores (301) positioned on the same side are connected with the conductive part (102) in a laser welding mode.
10. The multi-cell battery of claim 1 or 9, wherein: one end of each of the two lugs of the battery core (301) connected with the conductive part (102) is flattened or kneaded to form a connecting surface attached to the shell wall of the shell (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322133794.6U CN220753579U (en) | 2023-08-09 | 2023-08-09 | Battery with multiple battery cells |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322133794.6U CN220753579U (en) | 2023-08-09 | 2023-08-09 | Battery with multiple battery cells |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220753579U true CN220753579U (en) | 2024-04-09 |
Family
ID=90564181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322133794.6U Active CN220753579U (en) | 2023-08-09 | 2023-08-09 | Battery with multiple battery cells |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220753579U (en) |
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2023
- 2023-08-09 CN CN202322133794.6U patent/CN220753579U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: No. 68, Xin'anjiang Road, Southeast Street, Changshu City, Suzhou City, Jiangsu Province, 215000 Patentee after: Jiangsu Zhengli New Energy Battery Technology Co.,Ltd. Country or region after: China Address before: No. 68, Xin'anjiang Road, Southeast Street, Changshu City, Suzhou City, Jiangsu Province, 215000 Patentee before: Jiangsu Zenergy Battery Technologies Co.,ltd Country or region before: China |