CN213584089U - Power battery cover plate and power battery - Google Patents
Power battery cover plate and power battery Download PDFInfo
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- CN213584089U CN213584089U CN202022370010.8U CN202022370010U CN213584089U CN 213584089 U CN213584089 U CN 213584089U CN 202022370010 U CN202022370010 U CN 202022370010U CN 213584089 U CN213584089 U CN 213584089U
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
A power battery cover plate and a power battery are provided, the power battery cover plate comprises: the top cover plate is provided with a groove, and the bottom of the groove is provided with a first through hole and a second through hole; the electrode assembly comprises a pole connecting block, an injection molding part, a first pole, a second pole, a first sealing ring, a second sealing ring and a welding block, wherein one ends of the first pole and the second pole are connected to the pole connecting block, and the other ends of the first pole and the second pole respectively penetrate through a first through hole and a second through hole to be connected to the welding block; the injection molding piece is sleeved outside the pole connecting block, the first pole and the second pole; the first sealing ring and the second sealing ring are respectively sleeved at the bottoms of the first pole column and the second pole column and are pressed between the top cover plate and the welding block. Electrode subassembly adopts bipolar post structure, for prior art's single-pole post structure, the utility model discloses an electrode subassembly can be theoretically through double electric current, has satisfied electric core and has carried out the demand that heavy current discharged.
Description
Technical Field
The utility model belongs to the power battery field, more specifically relates to a power battery apron and power battery.
Background
At present, the lithium ion power battery is widely applied to the fields of computers, mobile phones and the like due to the advantages of high energy density, high power density, multiple recycling times, long storage time and the like, has a wide application prospect in electric vehicles such as electric bicycles, electric automobiles and the like and energy storage facilities along with the maturity of manufacturing technology, and can effectively solve global problems such as environmental pollution, energy crisis and the like due to the wide application of the power battery.
In the prior art, most power batteries adopt the cover plate with the single-pole column structure, but for the long and thin battery core which needs to be charged and discharged with large current, the cover plate with the single-pole column structure hardly meets the overcurrent requirement.
Therefore, the power battery cover plate adopting the bipolar column structure is expected to be invented, and the problem that the cover plate with the unipolar column structure cannot meet the requirement of the battery core for large-current discharge can be effectively solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a power battery apron adopts bipolar post structure to solve among the prior art because the apron that uses single-pole post structure and can't satisfy electric core and carry out the demand that heavy current discharged.
In order to achieve the above object, the utility model provides a power battery cover plate, include:
the top cover plate is provided with a groove, and the bottom of the groove is provided with a first through hole and a second through hole;
an electrode assembly, which comprises a pole connecting block, an injection molding piece, a first pole, a second pole, a first sealing ring, a second sealing ring and a welding block, wherein,
one ends of the first pole and the second pole are connected to the pole connecting block, and the other ends of the first pole and the second pole respectively penetrate through the first through hole and the second through hole to be connected to the welding block; the injection molding piece is sleeved outside the pole connecting block, the first pole and the second pole and connected in the groove so as to fix the pole connecting block, the first pole and the second pole on the top cover plate; the first sealing ring and the second sealing ring are respectively sleeved at the bottoms of the first pole column and the second pole column and are pressed between the top cover plate and the welding block.
Optionally, the top cover plate is provided with a third through hole matched with the groove.
Optionally, the groove and the third through hole are both rectangles, the welding block is a cuboid, wherein the length and the width of the welding block are respectively greater than those of the third through hole of the insulating plastic sheet.
Optionally, a fourth through hole and a fifth through hole, which are adapted to the diameters of the first pole column and the second pole column, are respectively formed in the welding block, and the other ends of the first pole column and the second pole column are respectively inserted into the fourth through hole and the fifth through hole and welded with the welding block.
Optionally, the pole connecting block is a cuboid, and four side faces of the cuboid are respectively provided with a step structure.
Optionally, the injection molding includes four lateral walls that connect gradually, and the top of every lateral wall is equipped with the flange of inside extension, the flange joint in the outside of stair structure.
Optionally, a sixth through hole and a seventh through hole which are matched with the diameters of the first pole column and the second pole column are further formed in the bottom of the injection molding piece, and one end of the first pole column and one end of the second pole column penetrate through the sixth through hole and the seventh through hole respectively to be welded with the pole column connecting block;
the sixth through hole with the pore wall of seventh through hole still is equipped with protruding closure structure respectively, protruding closure structure wrap up respectively in the periphery of first utmost point post with the second utmost point post passes first through hole with the second through hole extends to the top of welding piece.
Optionally, the solder bumps are L-shaped.
Optionally, the bottom of the groove is further provided with a plurality of eighth through holes, and the bottom of the injection molding piece is provided with a plurality of reinforcing parts extending into the eighth through holes.
A power battery comprises a shell and the power battery cover plate.
The utility model discloses a have beneficial effect to lie in:
the electrode assembly comprises a pole connecting block, an injection molding part, a first pole, a second pole, a first sealing ring, a second sealing ring and a welding block, one ends of the first pole and the second pole are connected to the pole connecting block, the other ends of the first pole and the second pole respectively penetrate through the first through hole and the second through hole to be connected to the welding block, the injection molding part is sleeved on the outer sides of the pole connecting block, the first pole and the second pole, and the first sealing ring and the second sealing ring are respectively sleeved on the bottoms of the first pole and the second pole; electrode subassembly adopts bipolar post structure, for prior art's single-pole post structure, the utility model discloses an electrode subassembly can satisfy electric core and carry out the demand that heavy current discharged through double electric current in theory, has effectively solved among the prior art because the apron that uses single-pole post structure and can't satisfy electric core and carry out the demand that heavy current discharged.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout the exemplary embodiments of the present invention.
Fig. 1 shows an exploded view of a power battery cover plate according to an embodiment of the present invention.
Fig. 2 shows a cross-sectional view of a power cell cover plate according to an embodiment of the invention.
Fig. 3 shows a schematic structural diagram of the pole connecting block of the power battery cover plate according to an embodiment of the present invention.
Fig. 4 shows a schematic structural diagram of a top cover plate of a power battery cover plate according to an embodiment of the present invention.
Fig. 5 shows a schematic structural diagram of a welding block of a power battery cover plate in an L shape according to an embodiment of the present invention.
Fig. 6 shows a schematic structural diagram of a power battery according to an embodiment of the present invention.
Description of the reference numerals
1. A top cover sheet; 11. a groove; 12. a first through hole; 13. a second through hole; 14. a first liquid injection hole; 15. an eighth through hole; 2. a pole connecting block; 21. a step structure; 3. an injection molded part; 31. a sixth through hole; 32. a seventh via hole; 33. a convex hull structure; 4. a first pole column; 5. a second pole; 6. a first seal ring; 7. a second seal ring; 8. an insulating plastic sheet; 81. a third through hole; 82. a second liquid injection hole; 9. welding the blocks; 91. a fourth via hole; 92. a fifth through hole; 10. a housing.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
According to the utility model discloses a power battery apron, include:
the top cover plate is provided with a groove, and the bottom of the groove is provided with a first through hole and a second through hole;
an electrode assembly, which comprises a pole connecting block, an injection molding piece, a first pole, a second pole, a first sealing ring, a second sealing ring and a welding block, wherein,
one ends of the first pole and the second pole are connected to the pole connecting block, and the other ends of the first pole and the second pole respectively penetrate through the first through hole and the second through hole to be connected to the welding block; the injection molding piece is sleeved outside the pole connecting block, the first pole and the second pole and connected in the groove so as to fix the pole connecting block, the first pole and the second pole on the top cover plate; the first sealing ring and the second sealing ring are respectively sleeved at the bottoms of the first pole column and the second pole column and are pressed between the top cover plate and the welding block.
The electrode assembly comprises a pole connecting block, an injection molding part, a first pole, a second pole, a first sealing ring, a second sealing ring and a welding block, wherein one ends of the first pole and the second pole are connected to the pole connecting block, the other ends of the first pole and the second pole respectively penetrate through a first through hole and a second through hole to be connected to the welding block, the injection molding part is sleeved on the outer sides of the pole connecting block, the first pole and the second pole, and the first sealing ring and the second sealing ring are respectively sleeved on the bottoms of the first pole and the second pole; electrode subassembly adopts bipolar post structure, for prior art's single-pole post structure, the utility model discloses an electrode subassembly can satisfy electric core and carry out the demand that heavy current discharged through double electric current in theory, has effectively solved among the prior art because the apron that uses single-pole post structure and can't satisfy electric core and carry out the demand that heavy current discharged.
In one example, the power battery cover plate further comprises an insulating plastic sheet matched with the top cover plate, the insulating plastic sheet is arranged on the lower surface of the top cover plate, and a third through hole matched with the groove is formed in the insulating plastic sheet.
Specifically, insulating plastic piece and top cap piece cooperate to locate the lower surface of top cap piece, insulating plastic piece links together through rubberizing technology and top cap piece.
In one example, the groove and the third through hole are both rectangular, and the welding block is a cuboid, wherein the length and the width of the welding block are respectively greater than the length and the width of the third through hole of the insulating plastic sheet.
In one example, the welding block is provided with a fourth through hole and a fifth through hole which are adaptive to the diameters of the first pole and the second pole respectively, and the other ends of the first pole and the second pole are inserted into the fourth through hole and the fifth through hole respectively and are welded with the welding block.
Specifically, the other ends of the first pole column and the second pole column are respectively inserted into the fourth through hole and the fifth through hole and welded with the welding block, in the actual process, the other ends of the first pole column and the second pole column and the welding block are welded into a whole by adopting a laser welding process, the first pole column and the second pole column which are welded into a whole with the welding block have strong structural strength and are not easy to break, and the service life of the electrode assembly is prolonged.
In one example, the pole connecting block is a cuboid, and four side surfaces of the cuboid are respectively provided with a step structure.
Specifically, the design of stair structure can make better being connected with utmost point post connecting block of injection molding, improves injection molding and utmost point post connecting block joint strength, and the injection molding is difficult for droing from utmost point post connecting block.
In one example, the injection molding piece comprises four side walls which are connected in sequence, the top of each side wall is provided with an inward extending flange, and the flanges are clamped on the outer sides of the step structures;
the bottom of the injection molding piece is also provided with a sixth through hole and a seventh through hole which are matched with the diameters of the first pole and the second pole, and one ends of the first pole and the second pole respectively penetrate through the sixth through hole and the seventh through hole to be welded with the pole connecting block;
the hole walls of the sixth through hole and the seventh through hole are respectively provided with a convex hull structure, and the convex hull structures wrap the peripheries of the first pole column and the second pole column respectively and penetrate through the first through hole and the second through hole to extend to the upper side of the welding block.
Specifically, the injection molding piece is integrally formed through an injection molding process, when the injection molding process is implemented, plastic flows downwards through the hole walls of the sixth through hole and the seventh through hole and wraps the peripheries of the first pole and the second pole to form a convex hull structure, and the convex hull structure extends to the upper side of the welding block because gaps are formed between the first through hole and the second through hole and between the first pole and the second pole respectively, so that the injection molding piece structure can generate stronger compression force on a first sealing ring and a second sealing ring which are respectively sleeved at the bottoms of the first pole and the second pole, and the sealing effect of the first sealing ring and the second sealing ring is enhanced;
further, utmost point post connecting block welds into a whole through the technique of brazing with the one end of first utmost point post and second utmost point post, and has stronger structural strength, difficult fracture, and utmost point post connecting block couples together first utmost point post and second utmost point post in parallel, makes battery and external circuit connection through utmost point post connecting block.
In one example, the solder bumps are L-shaped.
Specifically, the welding piece still includes the bending structure, and the one side of welding piece can be located to the bending structure, and the welding piece is the L type, and the both sides of welding piece also can be located to the bending structure, and the welding piece is the U type, can select according to actual conditions is nimble, and when carrying out utmost point ear welding, utmost point ear can the lug beading in the bending structure of welding piece, can reduce the quantity of spare part among the power battery, effectively reduces the manufacturing cost of battery.
In one example, the bottom of the groove is further provided with a plurality of eighth through holes, and the bottom of the injection molding piece is provided with a plurality of reinforcing parts extending into the eighth through holes.
Specifically, when forming the injection molding through injection molding process, because the bottom of recess still is equipped with a plurality of eighth through-holes, the plastic will flow into and form the rib in the eighth through-hole, and the design of eighth through-hole will effectively strengthen the joint strength between injection molding and the top cap piece, has also strengthened the torsional strength of power battery apron simultaneously.
A power battery comprises a shell and the power battery cover plate.
Specifically, the power battery apron that casing one end was located to the lid is connected with the positive pole of electric core, and the power battery apron that the casing other end was located to the lid is connected with the negative pole of electric core, consequently, the utility model discloses a power battery has two and annotates the liquid hole, and two designs of annotating the liquid hole have made things convenient for the battery to annotate the liquid to improve the immersion fluid effect of electric core.
Examples
As shown in fig. 1-2, a power battery cover plate comprises:
the top cover plate 1 is provided with a groove 11, and the bottom of the groove 11 is provided with a first through hole 12 and a second through hole 13;
the electrode assembly comprises a pole connecting block 2, an injection molding part 3, a first pole 4, a second pole 5, a first sealing ring 6, a second sealing ring 7 and a welding block 9, wherein one ends of the first pole 4 and the second pole 5 are connected to the pole connecting block 2, and the other ends of the first pole 4 and the second pole 5 respectively penetrate through a first through hole 12 and a second through hole 13 to be connected to the welding block 9; the injection molding piece 3 is sleeved outside the pole connecting block 2, the first pole 4 and the second pole 5 and is connected in the groove so as to fix the pole connecting block 2, the first pole 4 and the second pole 5 on the top cover plate 1; the first sealing ring 6 and the second sealing ring 7 are respectively sleeved at the bottoms of the first pole column 4 and the second pole column 5 and are pressed between the top cover plate 1 and the welding block 9.
As shown in fig. 1-2, the power battery cover plate further includes an insulating plastic sheet 8 matched with the top cover plate 1, the insulating plastic sheet 8 is disposed on the lower surface of the top cover plate 1, a third through hole 81 matched with the groove 11 is disposed on the insulating plastic sheet 8, preferably, a first liquid injection hole 14 and an explosion-proof through hole (not shown) are disposed on the top cover plate 1, and an explosion-proof valve assembly is disposed in the explosion-proof through hole; the insulating plastic sheet 8 is also provided with a second pour hole 82 corresponding to the first pour hole 14.
Wherein, recess 11 and third through-hole 81 are the rectangle, and welding piece 9 is the cuboid, and wherein, the length and the width of welding piece 9 are greater than the length and the width of the third through-hole 81 of insulating plastic piece 8 respectively. The welding block 9 is provided with a fourth through hole 91 and a fifth through hole 92 which are adapted to the diameters of the first pole column 4 and the second pole column 5, the other ends of the first pole column 4 and the second pole column 5 are respectively inserted into the fourth through hole 91 and the fifth through hole 92 and welded with the welding block 9, wherein the welding block 9 is L-shaped as shown in fig. 5. As shown in fig. 3, the pole connecting block 2 is a rectangular parallelepiped, and four side surfaces of the rectangular parallelepiped are respectively provided with step structures 21. The injection molding piece 3 comprises four side walls which are connected in sequence, the top of each side wall is provided with an inwardly extending flange, and the flanges are clamped on the outer side of the step structure 21; the bottom of the injection molding piece 3 is also provided with a sixth through hole 31 and a seventh through hole 32 which are matched with the diameters of the first pole 4 and the second pole 5, and one ends of the first pole 4 and the second pole 5 respectively penetrate through the sixth through hole 31 and the seventh through hole 32 to be welded with the pole connecting block 2; the hole walls of the sixth through hole 31 and the seventh through hole 32 are further respectively provided with a convex hull structure 33, and the convex hull structures 33 respectively wrap the peripheries of the first pole 4 and the second pole 5 and penetrate the first through hole 12 and the second through hole 13 to extend to the upper side of the welding block 9. As shown in fig. 4, the bottom of the groove 11 is further provided with a plurality of eighth through holes 15, and the bottom of the injection molding member 3 is provided with a plurality of reinforced portions extending into the eighth through holes 15.
As shown in fig. 6, the utility model also discloses a power battery, including casing 10 with power battery apron.
In summary, the electrode assembly comprises a pole connecting block, an injection molding part, a first pole, a second pole, a first sealing ring, a second sealing ring and a welding block, wherein one end of the first pole and one end of the second pole are connected to the pole connecting block, the other end of the first pole and the other end of the second pole are respectively connected to the welding block through a first through hole and a second through hole, the injection molding part is sleeved on the outer sides of the pole connecting block, the first pole and the second pole, and the first sealing ring and the second sealing ring are respectively sleeved on the bottoms of the first pole and the second pole; electrode subassembly adopts bipolar post structure, for prior art's single-pole post structure, the utility model discloses an electrode subassembly can satisfy electric core and carry out the demand that heavy current discharged through double electric current in theory, has effectively solved among the prior art because the apron that uses single-pole post structure and can't satisfy electric core and carry out the demand that heavy current discharged.
While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. A power battery cover plate, comprising:
the top cover plate is provided with a groove, and the bottom of the groove is provided with a first through hole and a second through hole;
an electrode assembly, which comprises a pole connecting block, an injection molding piece, a first pole, a second pole, a first sealing ring, a second sealing ring and a welding block, wherein,
one ends of the first pole and the second pole are connected to the pole connecting block, and the other ends of the first pole and the second pole respectively penetrate through the first through hole and the second through hole to be connected to the welding block; the injection molding piece is sleeved outside the pole connecting block, the first pole and the second pole and connected in the groove so as to fix the pole connecting block, the first pole and the second pole on the top cover plate; the first sealing ring and the second sealing ring are respectively sleeved at the bottoms of the first pole column and the second pole column and are pressed between the top cover plate and the welding block.
2. The power battery cover plate according to claim 1, further comprising an insulating plastic sheet matched with the top cover plate, wherein the insulating plastic sheet is arranged on the lower surface of the top cover plate, and a third through hole matched with the groove is formed in the insulating plastic sheet.
3. The power battery cover plate according to claim 2, wherein the groove and the third through hole are both rectangular, and the welding block is a cuboid, wherein the length and the width of the welding block are respectively greater than those of the third through hole of the insulating plastic sheet.
4. The power battery cover plate according to claim 3, wherein the welding block is provided with a fourth through hole and a fifth through hole which are matched with the diameters of the first pole and the second pole respectively, and the other ends of the first pole and the second pole are inserted into the fourth through hole and the fifth through hole respectively and are welded with the welding block.
5. The power battery cover plate according to claim 1, wherein the pole connecting block is a cuboid, and four side surfaces of the cuboid are respectively provided with a step structure.
6. The power battery cover plate according to claim 5, wherein the injection molding piece comprises four side walls which are connected in sequence, the top of each side wall is provided with an inward extending flange, and the flanges are clamped on the outer sides of the step structures.
7. The power battery cover plate according to claim 6, wherein a sixth through hole and a seventh through hole which are matched with the diameters of the first pole and the second pole are further formed in the bottom of the injection molding piece, and one end of the first pole and one end of the second pole respectively penetrate through the sixth through hole and the seventh through hole to be welded with the pole connecting block;
the sixth through hole with the pore wall of seventh through hole still is equipped with protruding closure structure respectively, protruding closure structure wrap up respectively in the periphery of first utmost point post with the second utmost point post passes first through hole with the second through hole extends to the top of welding piece.
8. The power cell cover plate of claim 1, wherein the weld block is L-shaped.
9. The power battery cover plate according to claim 1, wherein the bottom of the groove is further provided with a plurality of eighth through holes, and the bottom of the injection molding part is provided with a plurality of reinforced parts extending into the eighth through holes.
10. A power cell comprising a housing and a power cell cover according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022370010.8U CN213584089U (en) | 2020-10-22 | 2020-10-22 | Power battery cover plate and power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022370010.8U CN213584089U (en) | 2020-10-22 | 2020-10-22 | Power battery cover plate and power battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213584089U true CN213584089U (en) | 2021-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022370010.8U Active CN213584089U (en) | 2020-10-22 | 2020-10-22 | Power battery cover plate and power battery |
Country Status (1)
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|---|---|
| CN (1) | CN213584089U (en) |
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- 2020-10-22 CN CN202022370010.8U patent/CN213584089U/en active Active
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