CN110176562B - Battery pack upper and lower shell equipotential structure - Google Patents
Battery pack upper and lower shell equipotential structure Download PDFInfo
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- CN110176562B CN110176562B CN201910371604.XA CN201910371604A CN110176562B CN 110176562 B CN110176562 B CN 110176562B CN 201910371604 A CN201910371604 A CN 201910371604A CN 110176562 B CN110176562 B CN 110176562B
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- casing
- section
- piercing
- battery pack
- contact piece
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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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
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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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention belongs to the technical field of vehicle-mounted power supplies, and particularly relates to an equipotential structure of an upper shell and a lower shell of a battery pack. It has solved the problem that does not have stable equipotential between the upper and lower casing of current battery package. This battery pack upper and lower casing equipotential structure, including last casing and lower casing, it has electrophoresis layer, its characterized in that to go up casing and lower casing surface: the upper shell is provided with an elastic contact piece which can puncture the electrophoresis layer on the surface of the lower shell and is contacted with the surface of the lower shell, or the lower shell is provided with an elastic contact piece which can puncture the electrophoresis layer on the surface of the upper shell and is contacted with the surface of the upper shell. The battery pack is internally provided with the equipotential structure, so that the clamping shell on the battery pack has stable equipotential.
Description
Technical Field
The invention belongs to the technical field of vehicle-mounted power supplies, and particularly relates to an equipotential structure of an upper shell and a lower shell of a battery pack.
Background
Because the control circuit inside the battery pack is precise and important, the battery pack shell is required to be used as an electromagnetic screen to prevent external electromagnetic interference. This requires that the upper and lower cases of the battery pack have electrical continuity so that they are at the same potential. However, due to the requirements for corrosion resistance and the like in the design, the battery pack case is usually subjected to electrophoresis treatment, so that the upper case and the lower case are insulated from each other. This requires that the upper and lower housings be connected together at some point between them so that they are at the same potential.
It is now common practice to serve as the connection point for the upper and lower housings by a threaded contact. For example, chinese patent application No. CN201510889938.8 discloses a battery pack case and a battery pack having the same, wherein the battery pack case includes a case and a frame for supporting battery modules, the case includes an upper case and a lower case fixedly connected together, a sealing structure is disposed between the upper case and the lower case, and the upper case and the lower case are connected by threads.
Although this technical scheme provides the assurance to the leakproofness of battery package, and the battery package infiltration when avoiding wading leads to the short circuit or the life-span of battery module to subtract the weak point, nevertheless because the hole site inner wall of casing must be contacted with bolt screw thread on the unable hole site inner wall of guaranteeing to go up of traditional screw thread contact mode, the screw thread probably breaks away from with last casing hole site inner wall in battery package use, leads to the two to no longer contact, has the battery package under and the casing equipotential risk of losing efficacy.
Disclosure of Invention
The invention aims to provide an equipotential structure of an upper shell and a lower shell of a battery pack aiming at the problems in the prior art, and the invention aims to solve the technical problems that: how to realize that the battery pack has stable equipotential between an upper shell and a lower shell.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a casing equipotential structure about battery package, includes casing and lower casing, go up casing and lower casing surface and have electrophoresis layer, its characterized in that: the upper shell is provided with an elastic contact piece which can puncture the electrophoresis layer on the surface of the lower shell and is contacted with the surface of the lower shell, or the lower shell is provided with an elastic contact piece which can puncture the electrophoresis layer on the surface of the upper shell and is contacted with the surface of the upper shell.
The working principle is as follows: connect together elastic contact piece and last casing, when last casing and casing down assembled, the casing can extrude the elastic contact piece of being connected on last casing down, and elastic contact piece can be along with the extrusion lacerate the electrophoresis layer of casing under expose the metal part of casing and lean on mutually with the metal part, because elastic contact piece has certain bounce through the extrusion, can be inseparable with the metal part laminating of casing down. Through the middle bridge lapping effect of the elastic contact pieces, the upper shell and the lower shell are electrically continuous, and the electric potential is the same all the time, so that the electromagnetic shielding effect is achieved. According to the national standard requirement, the battery pack achieves IP67 level water and dust resistance, so the internal environment of the battery pack is relatively better than the external environment. Therefore, the elastic contact piece is arranged in the battery pack, so that the battery pack has excellent stability and corrosion resistance.
In the above-mentioned equipotential structure of lower casing on battery pack, the elasticity contact piece includes main shell fragment, main shell fragment has a canned paragraph and a section of puncturing, the canned paragraph is fixed in on the casing, and the tip of the section of puncturing is equipped with the sharp-pointed arch that can puncture the electrophoresis layer. The sharp bulge arranged at the end part of the puncture section can ensure that the reliability of the scratched electrophoretic layer is higher.
In the above-mentioned battery pack upper and lower casing equipotential structure, the section of puncturing pastes with the lower casing inner wall and is the slope setting. The piercing section and the lower shell are obliquely arranged, so that when the upper shell and the lower shell are assembled, the main elastic sheet can smoothly slide on the surface of the lower shell to scrape off the electrophoresis layer.
In the above-mentioned equipotential structure of the upper and lower shells of the battery pack, a connecting section is arranged between the fixing section and the piercing section, and the connecting section is connected with the piercing section to form an L-shaped cross section. When the upper and lower shells are assembled, the included angle between the connecting section and the piercing section can be extruded, after the upper and lower shells are assembled, the piercing section and the surface of the lower shell form the included angle and the included angle between the connecting section and the piercing section are compressed to a certain degree to obtain the rebound force, and the main elastic piece can be attached to the lower shell more effectively and tightly.
In the above-mentioned equipotential structure of battery pack upper and lower shells, the connection segment is welded with the auxiliary spring plate, the piercing section and the auxiliary spring plate form an included angle of 70 to 95 degrees, and the piercing section and the auxiliary spring plate can expand the included angle after being extruded. The auxiliary elastic sheet welded on the connecting section can apply extra elasticity to the main elastic sheet after the upper shell and the lower shell are assembled, and meanwhile, when the upper shell and the lower shell are assembled, the auxiliary elastic sheet can also contact with the lower shell to a certain extent to scrape off an electrophoresis layer on the lower shell. The main elastic sheet and the auxiliary elastic sheet are downward, and the elastic sheets are tightly pressed on the lower tray by elasticity and downward gravity to form electric continuity.
In the above-mentioned battery pack upper and lower casing equipotential structure, the tip of assisting the shell fragment to keep away from the linkage segment has the sharp-pointed arch that can puncture casing electrophoresis layer down. The sharp-pointed protrusion arranged on the auxiliary elastic sheet can enable the elastic contact sheet to be higher in reliability of scraping off the electrophoresis layer on the lower shell, and contact between the elastic contact sheet and the lower shell is increased.
In the above-mentioned equipotential structure of the upper and lower shells of the battery pack, the bottom of the sharp projection has a flat surface capable of abutting against the shell. The plane that sharp-pointed protruding bottom set up can be as many as possible make contact between elastic contact piece and the lower casing, increase area of contact, promote the reliability of contact.
In the above-mentioned battery pack upper and lower shell equipotential structure, the sharp-pointed protrusion is rack-shaped. The sharp-pointed protrusion is in a rack shape, so that more scratches can be left on the electrophoresis layer of the lower shell, and the elastic contact piece is convenient to contact with the lower shell.
Compared with the prior art, this battery pack upper and lower casing equipotential structure has following advantage:
1. the battery pack has IP 67-grade waterproof and dustproof functions, and the electric connection structure is arranged in the battery pack, so that the problem of contradiction between the anticorrosion requirement and the equipotential requirement is solved;
2. after the upper shell and the lower shell are assembled, the elastic contact piece has certain rebound force and can be continuously and tightly matched with the upper shell and the lower shell.
Drawings
Fig. 1 is a schematic perspective view of an embodiment of the present invention.
Fig. 2 is a perspective view of the elastic contact piece.
Fig. 3 is a front view of the resilient contact piece before pressing.
Fig. 4 is a front view of the resilient contact piece after pressing.
Fig. 5 is a front view of the main spring.
Fig. 6 is a partially enlarged view of the elastic contact piece.
Fig. 7 is a schematic view of the overall structure of the embodiment of the present invention.
Fig. 8 is a partially enlarged view of the resilient contact piece contacting the lower housing.
In the figure, 1, an upper shell; 2. a lower housing; 3. an elastic contact piece; 4. a main spring plate; 5. an auxiliary spring plate; 6. a sharp projection; 7. a fixed section; 8. a connecting section; 9. a piercing section; 10. and (4) a plane.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1 and 7, the embodiment of the present invention includes an upper casing 1 and a lower casing 2, the surfaces of the upper casing 1 and the lower casing 2 have electrophoretic layers, the upper casing 1 is provided with an elastic contact piece 3 capable of piercing the electrophoretic layer on the surface of the lower casing 2 and contacting with the surface of the lower casing 2 or the lower casing 2 is provided with an elastic contact piece 3 capable of piercing the electrophoretic layer on the surface of the upper casing 1 and contacting with the surface of the upper casing 1 to connect the elastic contact piece 3 with the upper casing 1, when the upper shell 1 and the lower shell 2 are assembled, the lower shell 2 can extrude the elastic contact piece 3 connected with the upper shell 1, the elastic contact piece 3 can cut the electrophoresis layer of the lower shell 2 along with the extrusion to expose and attach to the metal part of the lower shell 2, because the elastic contact piece has certain bounce force after being extruded, the elastic contact piece can be tightly attached to the metal part of the lower shell 2. Through the middle bridge lapping action of the elastic contact pieces 3, the upper shell 2 and the lower shell 2 are electrically continuous, and the electric potential is always the same, so that the electromagnetic shielding effect is achieved.
Specifically, as shown in fig. 1, 2, 5, 7 and 8, the elastic contact piece 3 includes a main elastic sheet 4, the main elastic sheet 4 has a fixing section 7 and a piercing section 9, the fixing section 7 is fixed on the upper housing 1, an end of the piercing section 9 is provided with a sharp protrusion 6 capable of piercing the electrophoretic layer, and the piercing section 9 is attached to the inner wall of the lower housing 2 and is disposed in an inclined manner. The bottom of the piercing section 9 needs to be capable of scraping off the electrophoretic layer, so that the bottom of the piercing section 9 may be blade-like or needle-like, and preferably, the sharp protrusion 6 is provided at the bottom of the piercing section 9. The piercing section 9 is pressed after contacting the inner wall of the lower shell 2 and can be obliquely arranged with the inner wall of the lower shell 2 to scrape the electrophoresis layer on the surface of the lower shell 2 or the piercing section 9 is vertically arranged with the surface of the lower shell 2 to be scraped, and the electrophoresis layer is pierced to be attached to the metal surface of the lower shell 2. Preferably, the piercing section 9 is arranged obliquely in contact with the inner wall of the lower housing 2.
Further, as shown in fig. 2 and 5, a connecting section 8 is disposed between the fixing section 7 and the piercing section 9, and the connecting section 8 and the piercing section 9 are connected to form an L-shaped cross section. The connecting section 8 and the piercing section 9 may also be formed in a zigzag shape or a plurality of shapes capable of adding elasticity to the piercing section 9, and it is preferable to adopt an L-shaped cross section in which the connecting section 8 and the piercing section 9 are connected.
Further, as shown in fig. 1, 2, 3, 4 and 7, the connection section 8 is welded with the auxiliary elastic sheet 5, the piercing section 9 and the auxiliary elastic sheet 5 form an included angle of 70 to 95 degrees, and the included angle can be enlarged after the piercing section 9 and the auxiliary elastic sheet 5 are squeezed. The piercing section 9 and the auxiliary spring plate 5 form an included angle of 50 to 120 degrees, and preferably, the piercing section 9 and the auxiliary spring plate 5 form an included angle of 70 to 95 degrees.
Further, as shown in fig. 2 and 3, the end of the auxiliary spring 5 away from the connecting section 8 has a sharp protrusion 6 capable of piercing the electrophoretic layer of the lower casing 2. The auxiliary spring plate 5 and the main spring plate 4 are both provided with sharp protrusions 6, so that the auxiliary spring plate 5 can puncture the electrophoretic layer of the lower shell 2 while applying additional elastic force to the main spring plate 4.
Further, as shown in fig. 2, 5, 6, 7 and 8, the bottom of the sharp protrusion 6 on the main spring plate 4 and the auxiliary spring plate 5 has a flat surface 10 capable of abutting against the lower housing 2, and the sharp protrusion 6 is disposed in a rack shape. The flat surface 10 provided at the bottom of the sharp projection 6 can increase the contact area with the lower case 2.
Although the above-described embodiment has the elastic contact piece attached to the upper case, the same is true for the elastic contact piece attached to the lower case.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (8)
1. The utility model provides a battery pack is upper and lower casing equipotential structure, includes casing (1) and casing (2) down, upper casing (1) and casing (2) surface have the electrophoresis layer down, its characterized in that, upper casing (1) internal surface is equipped with can puncture casing (2) internal surface electrophoresis layer down and with casing (2) surface contact's elasticity contact piece (3) down or casing (2) internal surface is equipped with can puncture casing (1) internal surface electrophoresis layer and with last casing (1) surface contact's elasticity contact piece (3).
2. The equipotential structure of the upper and lower casings of a battery pack according to claim 1, wherein the resilient contact piece (3) comprises a main resilient piece (4), the main resilient piece (4) has a fixed section (7) and a piercing section (9), when the inner surface of the upper casing (1) is provided with the resilient contact piece (3) capable of piercing the electrophoretic layer on the inner surface of the lower casing (2) and contacting the surface of the lower casing (2), the fixed section (7) is fixed on the upper casing (1), when the inner surface of the lower casing (2) is provided with the resilient contact piece (3) capable of piercing the electrophoretic layer on the inner surface of the upper casing (1) and contacting the surface of the upper casing (1), the fixed section (7) is fixed on the lower casing (2), and the end of the piercing section (9) is provided with a sharp protrusion (6) capable of piercing the electrophoretic layer.
3. The battery pack upper and lower casing equipotential structure of claim 2, wherein when the inner surface of the upper casing (1) is provided with the elastic contact piece (3) that can pierce the electrophoretic layer on the inner surface of the lower casing (2) and contact the surface of the lower casing (2), the piercing section (9) is attached to the inner wall of the lower casing (2) and is disposed in an inclined manner, and when the inner surface of the lower casing (2) is provided with the elastic contact piece (3) that can pierce the electrophoretic layer on the inner surface of the upper casing (1) and contact the surface of the upper casing (1), the piercing section (9) is attached to the inner wall of the upper casing (1) and is disposed in an inclined manner.
4. The equipotential structure of the upper and lower casings of a battery pack according to claim 3, wherein a connecting section (8) is disposed between the fixed section (7) and the punctured section (9), and the connecting section (8) and the punctured section (9) are connected to form an L-shaped cross section.
5. The equipotential structure of the upper and lower casings of a battery pack according to claim 4, wherein an auxiliary elastic sheet (5) is welded to the connecting section (8), the piercing section (9) and the auxiliary elastic sheet (5) form an included angle of 70 to 95 degrees, and the included angle between the piercing section (9) and the auxiliary elastic sheet (5) can be enlarged after extrusion.
6. The equipotential structure of the upper and lower casings of a battery pack according to claim 5, wherein when the inner surface of the upper casing (1) is provided with the elastic contact piece (3) capable of piercing the electrophoretic layer on the inner surface of the lower casing (2) and contacting the surface of the lower casing (2), the end of the auxiliary spring piece (5) away from the connection section (8) has a sharp protrusion (6) capable of piercing the electrophoretic layer on the lower casing (2), and when the inner surface of the lower casing (2) is provided with the elastic contact piece (3) capable of piercing the electrophoretic layer on the inner surface of the upper casing (1) and contacting the surface of the upper casing (1), the end of the auxiliary spring piece (5) away from the connection section (8) has a sharp protrusion (6) capable of piercing the electrophoretic layer on the upper casing (1).
7. The battery pack upper and lower casing equipotential structure of claim 2, 3, 4, 5, or 6, wherein when the inner surface of said upper casing (1) is provided with an elastic contact piece (3) capable of piercing the electrophoretic layer on the inner surface of the lower casing (2) and contacting with the surface of the lower casing (2), the bottom of said sharp protrusion (6) has a flat surface (10) capable of contacting with the lower casing (2), and when the inner surface of said lower casing (2) is provided with an elastic contact piece (3) capable of piercing the electrophoretic layer on the inner surface of the upper casing (1) and contacting with the surface of the upper casing (1), the bottom of said sharp protrusion (6) has a flat surface (10) capable of contacting with the upper casing (1).
8. The structure of the battery pack for equalizing potential of the upper and lower cases as claimed in claim 2, 3, 4, 5 or 6, wherein the sharp protrusions (6) are disposed in a rack shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910371604.XA CN110176562B (en) | 2019-05-06 | 2019-05-06 | Battery pack upper and lower shell equipotential structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910371604.XA CN110176562B (en) | 2019-05-06 | 2019-05-06 | Battery pack upper and lower shell equipotential structure |
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| Publication Number | Publication Date |
|---|---|
| CN110176562A CN110176562A (en) | 2019-08-27 |
| CN110176562B true CN110176562B (en) | 2022-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910371604.XA Active CN110176562B (en) | 2019-05-06 | 2019-05-06 | Battery pack upper and lower shell equipotential structure |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6049469A (en) * | 1997-08-20 | 2000-04-11 | Dell Usa, L.P. | Combination electromagnetic shield and heat spreader |
| CN2822121Y (en) * | 2005-08-04 | 2006-09-27 | 鸿富锦精密工业（深圳）有限公司 | Anti-electromagnetic interference shell |
| CN101668411A (en) * | 2008-09-05 | 2010-03-10 | 鸿富锦精密工业（深圳）有限公司 | Shielding cover |
| CN102577656A (en) * | 2010-04-20 | 2012-07-11 | 安特精密科技有限公司 | Electromagnetic interference shielding arrangement |
| CN202425284U (en) * | 2011-12-15 | 2012-09-05 | 江苏中科梦兰电子科技有限公司 | Electromagnetic shielding casing of integrated machine |
| CN205105522U (en) * | 2015-10-13 | 2016-03-23 | 3M创新有限公司 | Electromagnetic wave shielding piece and electronic equipment |
| DE102015111326A1 (en) * | 2015-07-13 | 2017-01-19 | Basf Se | Battery housing part for a traction battery of a vehicle, method for manufacturing a battery case and vehicle with a battery housing part |
| CN107611298A (en) * | 2017-08-24 | 2018-01-19 | 浙江吉利汽车研究院有限公司 | Battery bag sealing installation structure and electric automobile |
-
2019
- 2019-05-06 CN CN201910371604.XA patent/CN110176562B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6049469A (en) * | 1997-08-20 | 2000-04-11 | Dell Usa, L.P. | Combination electromagnetic shield and heat spreader |
| CN2822121Y (en) * | 2005-08-04 | 2006-09-27 | 鸿富锦精密工业（深圳）有限公司 | Anti-electromagnetic interference shell |
| CN101668411A (en) * | 2008-09-05 | 2010-03-10 | 鸿富锦精密工业（深圳）有限公司 | Shielding cover |
| CN102577656A (en) * | 2010-04-20 | 2012-07-11 | 安特精密科技有限公司 | Electromagnetic interference shielding arrangement |
| CN202425284U (en) * | 2011-12-15 | 2012-09-05 | 江苏中科梦兰电子科技有限公司 | Electromagnetic shielding casing of integrated machine |
| DE102015111326A1 (en) * | 2015-07-13 | 2017-01-19 | Basf Se | Battery housing part for a traction battery of a vehicle, method for manufacturing a battery case and vehicle with a battery housing part |
| CN205105522U (en) * | 2015-10-13 | 2016-03-23 | 3M创新有限公司 | Electromagnetic wave shielding piece and electronic equipment |
| CN107611298A (en) * | 2017-08-24 | 2018-01-19 | 浙江吉利汽车研究院有限公司 | Battery bag sealing installation structure and electric automobile |
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| CN110176562A (en) | 2019-08-27 |
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