CN217334310U - Compact lithium ion battery structure - Google Patents
Compact lithium ion battery structure Download PDFInfo
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- CN217334310U CN217334310U CN202221104919.1U CN202221104919U CN217334310U CN 217334310 U CN217334310 U CN 217334310U CN 202221104919 U CN202221104919 U CN 202221104919U CN 217334310 U CN217334310 U CN 217334310U
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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
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Abstract
The utility model discloses a compact lithium ion battery structure, which comprises a shell, a plurality of electric cores and an output mechanism; the shell is provided with an accommodating cavity, an opening is formed in the upper end face of the shell, and an upper cover is detachably connected to the opening; each battery cell is arranged in the containing cavity, the battery cells are sequentially arranged side by side, two adjacent battery cells are fixedly connected, a positive electrode lug and a negative electrode lug of each battery cell are uniformly distributed on the upper end surface of the battery cell and are in a bent shape, and the positive electrode lug of each battery cell is welded with the negative electrode lug of the next battery cell; the output mechanism comprises an isolation block and a protection plate. The utility model provides a technical scheme's beneficial effect is: because the electric core is directly packaged in the shell, a large amount of space waste of secondary packaging is avoided, more electric cores can be packaged in the shell with the same size, and the energy density of the battery is improved.
Description
Technical Field
The utility model belongs to the technical field of the power battery technique and specifically relates to a compact lithium ion battery structure is related to.
Background
At present, 12V lithium batteries are developed by a plurality of battery manufacturers, the sizes of the 12V lithium batteries are different, some manufacturers design according to their own standards, some manufacturers design according to the sizes required by the DIN EN 50342-2 standard, and the 12V lithium batteries with the sizes are basically designed in a mode of making modules to be arranged in a battery shell (PACK), namely, each battery core is respectively and independently packaged in a protective shell to form a plurality of battery modules, and then the plurality of packaged battery modules are packaged in the battery shell (for example, the chinese patent with the application number of CN 202110932702.3).
That is to say, from electric core itself to battery case, 2 layers of encapsulation altogether, make battery module to electric core encapsulation earlier, make the battery to a plurality of battery module encapsulation again, can bring very big space waste like this, just a lot of spaces in the battery case that is not big originally, just wasted on these "excessive packagine" to lead to battery energy density to hang down excessively.
SUMMERY OF THE UTILITY MODEL
In view of the above, a compact lithium ion battery structure is needed to solve the technical problems of low space utilization rate and low battery energy density in the battery case of the conventional lithium battery.
In order to achieve the above object, the present invention provides a compact lithium ion battery structure, which includes a housing, a plurality of cells and an output mechanism;
the shell is provided with an accommodating cavity, an opening is formed in the upper end face of the shell, and an upper cover is detachably connected to the opening;
each battery cell is arranged in the containing cavity, the battery cells are sequentially arranged side by side, two adjacent battery cells are fixedly connected, a positive electrode lug and a negative electrode lug of each battery cell are uniformly distributed on the upper end surface of the battery cell and are in a bent shape, and the positive electrode lug of each battery cell is welded with the negative electrode lug of the next battery cell;
the output mechanism comprises an isolating block and a protecting plate, the isolating block covers the positive pole lug and the negative pole lug, the protecting plate covers the isolating block, the negative pole input end of the protecting plate is first electrically connected with the negative pole lug of the battery cell, and the positive pole input end of the protecting plate is last electrically connected with the positive pole lug of the battery cell.
In some embodiments, the compact lithium ion battery structure further includes a plurality of epoxy plates, and each of the epoxy plates is covered on an outer sidewall of the battery cell located outside.
In some embodiments, a limiting groove matched with the battery cell is formed in the inner side wall of the shell.
In some embodiments, a plurality of clamping grooves are formed in the lower end surface of the isolation block, the number of the clamping grooves is the same as that of the battery cells and corresponds to the battery cells one by one, and each battery cell is clamped in the corresponding clamping groove.
In some embodiments, the output mechanism further includes a positive copper bar and a negative copper bar, the positive copper bar is fixed to the positive output end of the protection plate, and the negative copper bar is fixed to the negative output end of the protection plate.
In some embodiments, a positive copper pillar is fixed on the positive copper bar, and the positive copper pillar is fixed on the positive output end of the protection plate.
In some embodiments, a negative copper column is fixed on the negative copper bar, and the negative copper column is fixed on the negative output end of the protection plate.
In some embodiments, the positive copper bar is provided with a first screw hole, and the negative copper bar is provided with a second screw hole; the upper cover is provided with a first abdicating hole matched with the first screw hole and a second abdicating hole matched with the second screw hole; the output mechanism further comprises a positive connecting screw and a negative connecting screw, the positive connecting screw penetrates through the first abdicating hole back thread connection in the first screw hole, and the negative connecting screw penetrates through the second abdicating hole back thread connection in the second screw hole.
In some embodiments, the output mechanism further includes a first sealing pad, and the first sealing pad is sleeved on the positive connection screw.
In some embodiments, the output mechanism further includes a second sealing pad, and the second sealing pad is sleeved on the negative connection screw.
Compared with the prior art, the utility model provides a technical scheme's beneficial effect is: when the assembly, at first bond through the double faced adhesive tape between each electric core, pile together, later use laser-beam welding machine to weld the anodal utmost point ear of each electric core and the negative pole utmost point ear of next electric core, after the welding is accomplished, put whole module in the casing, glue is poured into to the casing inside, treats glue solidification back, packs into spacing block and protection shield, covers the upper cover again to accomplish the encapsulation of battery. Because the electric core is directly packaged in the shell, a large amount of space waste of secondary packaging is avoided, more electric cores can be packaged in the shell with the same size, and the energy density of the battery is improved.
Drawings
Fig. 1 is a schematic perspective view of an embodiment of a compact lithium ion battery structure provided by the present invention;
FIG. 2 is an exploded view of FIG. 1;
fig. 3 is a schematic perspective view of the lithium ion battery shown in fig. 1 without a case and an epoxy plate;
FIG. 4 is a perspective view of the cell assembly of FIG. 3;
FIG. 5 is an exploded view of FIG. 4;
FIG. 6 is an exploded view of the output mechanism of FIG. 2;
in the figure: 1-shell, 11-opening, 12-upper cover, 2-battery core, 21-anode tab, 22-cathode tab, 3-output mechanism, 31-spacer block, 311-clamping groove, 32-protection plate, 33-anode copper bar, 331-anode copper column, 332-first screw hole, 34-cathode copper bar, 341-cathode copper column, 342-second screw hole, 35-anode connecting screw, 36-cathode connecting screw, 37-first sealing gasket, 38-second sealing gasket and 4-epoxy plate.
Detailed Description
The following detailed description of the preferred embodiments of the invention, which is to be read in connection with the accompanying drawings, forms a part of this application, and together with the embodiments of the invention, serve to explain the principles of the invention and not to limit its scope.
Referring to fig. 1-5, the present invention provides a compact lithium ion battery structure, which includes a housing 1, a plurality of battery cells 2 and an output mechanism 3.
The shell 1 is provided with an accommodating cavity, an opening 11 is formed in the upper end face of the shell 1, and an upper cover 12 is detachably connected to the opening 11.
Each place in electric core 2 is all in hold the intracavity, each electric core 2 arranges side by side in proper order, adjacent two 2 fixed connection of electric core, each the anodal utmost point ear 21 of electric core 2 and negative pole utmost point ear 22 equipartition are arranged in just be the bending type on the up end of electric core 2, the anodal utmost point ear 21 of each electric core 2 all welds with the negative pole utmost point ear 22 of next electric core 2. In this embodiment, the number of the battery cells 2 is 4, which are sequentially referred to as a first battery cell, a second battery cell, a third battery cell and a fourth battery cell, the positive tab 21 of the first battery cell is welded to the negative tab 22 of the second battery cell, the positive tab 21 of the second battery cell is welded to the negative tab 22 of the third battery cell, and the positive tab 21 of the third battery cell is welded to the negative tab 22 of the fourth battery cell.
The output mechanism 3 includes the spacer 31 and the protection plate 32, the spacer 31 covers and locates each anodal utmost point ear 21 and each on the negative pole utmost point ear 22, the spacer 31 is made by insulating material for electrical isolation, the protection plate 32 covers and locates on the spacer 31, in this embodiment, the protection plate 32 is the BMS protection plate, the negative pole input of protection plate 32 is with first the negative pole utmost point ear 22 electricity of electricity core 2 is connected, the anodal input and the last of protection plate 32 the anodal utmost point ear 21 electricity of electricity core 2 is connected. In this embodiment, the negative input end of the protection plate 32 is electrically connected to the negative tab 22 of the first cell, and the positive input end of the protection plate 32 is electrically connected to the positive tab 21 of the fourth cell.
During assembly, the battery cells 2 are firstly bonded through double faced adhesive tapes and stacked together, then a laser welding machine is used for welding the positive electrode tab 21 of each battery cell 2 and the negative electrode tab 22 of the next battery cell 2, after welding is completed, the whole module is placed into the shell 1, glue is poured into the shell 1, after the glue is solidified, the isolating block 31 and the protecting plate 32 are put into the shell, and then the upper cover 12 is covered, so that the battery is packaged. Because the electric core 2 is directly packaged in the shell 1, a large amount of space waste of secondary packaging is avoided, more electric cores 2 can be packaged in the shell 1 with the same size, and the energy density of the battery is improved.
In order to protect the battery cell 2, referring to fig. 1-3, in a preferred embodiment, the compact lithium ion battery structure further includes a plurality of epoxy plates 4, and each of the epoxy plates 4 is covered on an outer side wall of the battery cell 2 located at an outer side.
In order to facilitate positioning of the battery cell 2 in the casing 1, referring to fig. 1 to 3, in a preferred embodiment, a limiting groove matched with the battery cell 2 is formed on an inner side wall of the casing 1, so that when the battery cell 2 is installed, the limiting groove can position the battery cell 2.
In order to limit each electric core 2, please refer to fig. 2, fig. 3 and fig. 6, in a preferred embodiment, a plurality of clamping grooves 311 are formed on a lower end surface of the isolating block 31, the number of the clamping grooves 311 is the same as that of the electric cores 2, and the electric cores 2 are clamped in the corresponding clamping grooves 311, so that each electric core 2 can be limited by the clamping grooves 311, the isolating block 31 and the electric cores 2 form a whole, and the stability of the battery structure is improved.
In order to facilitate energy output and input, please refer to fig. 2 and fig. 6, in a preferred embodiment, the output mechanism 3 further includes an anode copper bar 33 and a cathode copper bar 34, the anode copper bar 33 is fixed at the anode output end of the protection plate 32, and the cathode copper bar 34 is fixed at the cathode output end of the protection plate 32.
In order to specifically realize that the positive copper bar 33 is fixed to the positive output end of the protection plate 32, please refer to fig. 2 and fig. 6, in a preferred embodiment, a positive copper column 331 is fixed to the positive copper bar 33, and the positive copper column 331 is fixed to the positive output end of the protection plate 32.
In order to specifically realize that the negative copper bar 34 is fixed to the negative output end of the protection plate 32, referring to fig. 2 and fig. 6, in a preferred embodiment, a negative copper column 341 is fixed to the negative copper bar 34, and the negative copper column 341 is fixed to the negative output end of the protection plate 32.
In order to facilitate the electrical connection between the positive copper bar 33 and the negative copper bar 34 and the external electrical appliance, please refer to fig. 2 and 6, in a preferred embodiment, a first screw hole 332 is formed on the positive copper bar 33, and a second screw hole 342 is formed on the negative copper bar 34; the upper cover 12 is provided with a first yielding hole matched with the first screw hole 332 and a second yielding hole matched with the second screw hole 342; output mechanism 3 still includes anodal connecting screw 35 and negative pole connecting screw 36, anodal connecting screw 35 passes behind the first hole of stepping down screw thread connection in the first screw 332, negative pole connecting screw 36 passes behind the second hole of stepping down screw thread connection in the second screw 342, when using, compress tightly external electrical apparatus's positive terminal through anodal connecting screw 35, compress tightly external electrical apparatus's negative terminal through negative pole connecting screw 36, can realize that anodal copper bar 33 and negative pole copper bar 34 are connected with external electrical apparatus electricity.
In order to improve the waterproof performance, referring to fig. 2, fig. 3 and fig. 6, in a preferred embodiment, the output mechanism 3 further includes a first sealing gasket 37, and the first sealing gasket 37 is sleeved on the positive connection screw 35.
In order to improve the waterproof performance, referring to fig. 2, fig. 3 and fig. 6, in a preferred embodiment, the output mechanism 3 further includes a second gasket 38, and the second gasket 38 is sleeved on the negative connection screw 36.
For better understanding of the present invention, the following will describe the assembly process of the compact lithium ion battery structure provided by the present invention in detail with reference to fig. 1 to 6: firstly, each battery cell 2 is bonded through double faced adhesive tape, the battery cells are stacked together, then the epoxy plates 4 are placed on two sides of the grouped battery cells, the battery cells are tensioned through adhesive tapes, then the lugs of the battery cells 2 are bent, after all the battery cells are bent, the welding tool is used for fixing, then the laser welding machine is used for welding the positive lugs 21 of each battery cell 2 and the negative lugs 22 of the next battery cell 2, after the welding is completed, the whole module is placed in the shell 1, glue is poured into the shell 1, after the glue is solidified, the isolating blocks 31, the protection plates 32, the positive copper bars 33 and the negative copper bars 34 are filled, the upper cover 12 is covered, and therefore the packaging of the battery is completed. Because the electric core 2 is directly packaged in the shell 1, a large amount of space waste of secondary packaging is avoided, more electric cores 2 can be packaged in the shell 1 with the same size, and the energy density of the battery is improved.
The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention.
Claims (10)
1. A compact lithium ion battery structure is characterized by comprising a shell, a plurality of battery cells and an output mechanism;
the shell is provided with an accommodating cavity, an opening is formed in the upper end face of the shell, and an upper cover is detachably connected to the opening;
each battery cell is arranged in the containing cavity, the battery cells are sequentially arranged side by side, two adjacent battery cells are fixedly connected, a positive electrode lug and a negative electrode lug of each battery cell are uniformly distributed on the upper end surface of the battery cell and are in a bent shape, and the positive electrode lug of each battery cell is welded with the negative electrode lug of the next battery cell;
the output mechanism comprises a separation block and a protection plate, wherein the separation block covers the positive electrode lug and the negative electrode lug, the protection plate covers the separation block, the negative electrode input end of the protection plate is electrically connected with the first negative electrode lug of the battery cell, and the positive electrode input end of the protection plate is electrically connected with the last positive electrode lug of the battery cell.
2. The compact lithium ion battery structure of claim 1, further comprising a plurality of epoxy plates, each of the epoxy plates covering an outer sidewall of the cell located outside.
3. The compact lithium ion battery structure of claim 1, wherein a limiting groove matched with the battery cell is formed on an inner side wall of the casing.
4. The compact lithium ion battery structure of claim 1, wherein a plurality of slots are formed in a lower end surface of the isolation block, the number of the slots is the same as the number of the battery cells and corresponds to the number of the battery cells one by one, and each battery cell is clamped in the corresponding slot.
5. The compact lithium ion battery structure of claim 1, wherein the output mechanism further comprises a positive copper bar and a negative copper bar, the positive copper bar being fixed to the positive output end of the protection plate, and the negative copper bar being fixed to the negative output end of the protection plate.
6. The compact lithium ion battery structure of claim 5, wherein a positive copper pillar is fixed on the positive copper bar, and the positive copper pillar is fixed on a positive output end of the protection plate.
7. The compact lithium ion battery structure of claim 5, wherein a negative copper pillar is fixed on the negative copper bar, and the negative copper pillar is fixed on the negative output end of the protection plate.
8. The compact lithium ion battery structure of claim 5, wherein the positive copper bar is provided with a first screw hole, and the negative copper bar is provided with a second screw hole;
the upper cover is provided with a first abdicating hole matched with the first screw hole and a second abdicating hole matched with the second screw hole;
the output mechanism further comprises a positive connecting screw and a negative connecting screw, the positive connecting screw penetrates through the first abdicating hole back thread connection in the first screw hole, and the negative connecting screw penetrates through the second abdicating hole back thread connection in the second screw hole.
9. The compact lithium ion battery structure of claim 8, wherein the output mechanism further comprises a first gasket, and the first gasket is sleeved on the positive connection screw.
10. The compact lithium ion battery structure of claim 8, wherein the output mechanism further comprises a second gasket, and the second gasket is sleeved on the negative connection screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221104919.1U CN217334310U (en) | 2022-05-07 | 2022-05-07 | Compact lithium ion battery structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221104919.1U CN217334310U (en) | 2022-05-07 | 2022-05-07 | Compact lithium ion battery structure |
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| Publication Number | Publication Date |
|---|---|
| CN217334310U true CN217334310U (en) | 2022-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221104919.1U Active CN217334310U (en) | 2022-05-07 | 2022-05-07 | Compact lithium ion battery structure |
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| CN (1) | CN217334310U (en) |
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- 2022-05-07 CN CN202221104919.1U patent/CN217334310U/en active Active
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