CN113675516B - Conducting strip, power battery module and power battery box - Google Patents
Conducting strip, power battery module and power battery box Download PDFInfo
- Publication number
- CN113675516B CN113675516B CN202110768422.3A CN202110768422A CN113675516B CN 113675516 B CN113675516 B CN 113675516B CN 202110768422 A CN202110768422 A CN 202110768422A CN 113675516 B CN113675516 B CN 113675516B
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- conductive
- core
- sleeve
- strip
- conductive sheet
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- 239000000758 substrate Substances 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 45
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 15
- 229910052802 copper Inorganic materials 0.000 claims description 15
- 239000010949 copper Substances 0.000 claims description 15
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 14
- 238000005452 bending Methods 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- 210000004027 cell Anatomy 0.000 description 27
- 229910000570 Cupronickel Inorganic materials 0.000 description 9
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 description 9
- 238000003466 welding Methods 0.000 description 5
- 230000003247 decreasing effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
-
- 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
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
-
- 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
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
Abstract
The invention discloses a conductive sheet, a power battery module and a power battery box. The conductive sheet includes a base; the substrate is provided with a plurality of through holes, and a strip-shaped flange which is positioned in the through holes and used for electric connection is formed on the substrate; the base body is provided with a conductive tower spring; the tower spring is used for forming electric connection with the signal acquisition board. The strip-shaped flange of the conducting strip can provide reliable electric connection for the electric core in the power battery, and the tower spring can also form reliable electric connection with the signal acquisition board.
Description
The present application is a divisional application of chinese patent application with the application date of 2016, 11 and 16, the application number of 201611032443.4, and the inventive name of "power battery module and power battery box with power battery module".
Technical Field
The invention relates to the field of power batteries, in particular to a conductive sheet, a power battery module and a power battery box.
Background
With the increasing awareness of environmental protection, electric vehicles are becoming popular as vehicles. Along with the growth of electric automobiles, the scheme of the traditional lead-acid battery is not applicable, so that the safety, the installation consistency and the disassembly and assembly convenience of the power battery pack cannot be guaranteed, the pollution of the later recovery treatment is serious, and the organization production and the later maintenance are inconvenient.
Power batteries typically include a number of electrical cells. In the running process of the electric automobile, the power battery pack needs to bear serious jolt, the jolt easily causes the failure of the electric connection of parts in the power battery pack, and the electric connection of the power battery pack is unreliable.
Disclosure of Invention
The invention aims to overcome the defect of unreliable electrical connection in the existing power battery pack, and provides a conducting strip, a power battery module and a power battery box.
The invention provides a conductive sheet, which comprises a substrate; the substrate is provided with a plurality of through holes, and a strip-shaped flange which is positioned in the through holes and used for electric connection is formed on the substrate; the base body is provided with a conductive tower spring; the tower spring is used for forming electric connection with the signal acquisition board.
Preferably, the torsion spring is provided on a bending piece extending outwards from the base body and bending in a direction perpendicular to the base body.
Preferably, the base body is formed by combining a copper bar and a nickel sheet, and the tower spring is fixed on the copper bar.
Preferably, the strip-shaped flange is formed by extending the nickel sheet.
Preferably, the ends of the strip-shaped flanges are provided with raised bumps.
Preferably, the strip-shaped flanges are provided with strip-shaped holes extending along the length direction of the strip-shaped flanges, and the end part of each strip-shaped flange is provided with two protruding points which are respectively positioned at two sides of the strip-shaped holes.
Preferably, the elongated hole has a straight section, and the strip-shaped flange forms two parallel straight arms.
Preferably, the bump is arranged at the center of the through hole, the bump height of the bump is 0.2-0.4mm, and the diameter of the bump is 1-1.5mm.
Preferably, an arc groove is formed at the joint of the strip-shaped flange and the base body.
Preferably, the substrate is provided with at least one of a conductive post, a conductive post sleeve, a female plug and a conductive sleeve, and the conductive sleeve is used for forming electric connection with the conductive core.
Preferably, the conductive sleeve and the conductive core form a power battery connection structure; one or more elastic conductive pieces are arranged in the conductive sleeve; the conductive core comprises a core barrel and a conductive core body in the core barrel; the core body is detachably sleeved with the conductive sleeve, and the core body is contacted with the elastic conductive piece during the sleeving.
Preferably, the elastic conductive piece is clamped by the outer wall of the core body and the inner wall of the conductive sleeve when the core body is sleeved with the conductive sleeve.
Preferably, the inner wall of the conductive sleeve is provided with one or more conductive ring grooves, the elastic conductive piece is arranged in the conductive ring grooves, and the elastic conductive piece is in interference fit with the conductive ring grooves.
Preferably, the elastic conductive piece is an annular conductive spring.
Preferably, the conductive sleeve comprises a sleeve, the sleeve comprises a sleeve, and the inner walls of two ends of the sleeve are respectively provided with one or more elastic conductive pieces.
Preferably, the inner wall of the conductive sleeve is provided with at least one first sealing ring groove, the first sealing ring groove is arranged between the elastic conductive piece and the opening of the sleeve core body, and a first sealing ring is arranged in the first sealing ring groove.
Preferably, the outer wall of the middle position of the sleeve is also provided with an annular limiting ring.
Preferably, the core body comprises a first core body and second core bodies at two ends of the first core body, the diameter of the second core body is smaller than that of the first core body, the diameter of the first core body is matched with the inner diameter of the core barrel, and the second core body is connected with a sleeve of the conductive sleeve in a sleeved mode.
Preferably, the core barrel comprises a barrel body, and at least one second sealing ring is respectively arranged on the inner walls of the two ends of the barrel body and the outer walls of the second core body.
Preferably, the inner wall of the cylinder body at the junction of the first core body and the second core body is provided with a second sealing ring groove, two ends of the second sealing ring groove are provided with bulges on the inner wall of the cylinder body, and the second sealing ring is limited in the second sealing ring groove.
The invention also provides a power battery module which comprises an electric core, and the power battery module further comprises the conductive sheet, wherein the conductive sheet is used for electrically connecting the electric core.
Preferably, the power battery module comprises a module box, and two grooves are respectively formed in the left side and the right side of the module box and are used for being clamped into clamping strips in a grouping mode, a signal acquisition board is fixed on the clamping strips, and the signal acquisition board is contacted with the tower spring to realize electric connection after being clamped into the clamping grooves along with the clamping strips.
The invention also provides a power battery box, which comprises a box body and a battery module, wherein the battery module is arranged in the box body, and a plurality of battery modules which are arranged side by side and fixedly form the battery module.
On the basis of conforming to the common knowledge in the field, the above preferred conditions can be arbitrarily combined to obtain the preferred examples of the invention.
The invention has the positive progress effects that:
the strip-shaped flange of the conducting strip can provide reliable electric connection for the electric core in the power battery, and the tower spring can also form reliable electric connection with the signal acquisition board.
Drawings
Fig. 1 is a schematic view of the structure of an embodiment of the power cell box of the present invention.
Fig. 2 is a schematic view of the internal structure of the power cell case shown in fig. 1.
Fig. 3 is a schematic structural view of an embodiment of the cartridge of the present invention.
Fig. 4 is a schematic view of an inverted structure of the cartridge shown in fig. 3.
Fig. 5 is a schematic structural view of one embodiment of the copper-nickel conductive sheet of the present invention.
Fig. 6 is an enlarged partial schematic view of the area a in fig. 5.
Fig. 7 is a schematic view of the structure of one embodiment of the copper-nickel conductive sheet with conductive sleeve of the present invention.
Fig. 8 is a schematic structural view of one embodiment of a copper-nickel conductive sheet with female plug of the present invention.
Fig. 9 is a schematic perspective view of one embodiment of the conductive sleeve of the present invention.
Fig. 10 is an exploded perspective view of the conductive sleeve of fig. 9.
Fig. 11 is a schematic plan view of the conductive sleeve of fig. 9.
Fig. 12 is a cross-sectional view of the conductive sleeve of fig. 11 taken along line A-A.
Fig. 13 is a schematic view of the sleeve of the conductive sleeve of fig. 10.
Fig. 14 is a cross-sectional view of the sleeve of fig. 13 taken along line B-B.
Fig. 15 is a schematic perspective view of one embodiment of a conductive core of the present invention.
Fig. 16 is an exploded perspective view of the conductive core of fig. 15.
Fig. 17 is a schematic plan view of the conductive core of fig. 15.
Fig. 18 is a cross-sectional view of the conductive core of fig. 17 taken along line A-A.
Fig. 19 is a schematic plan view of a core barrel of the conductive core of fig. 16.
Fig. 20 is a cross-sectional view of the cartridge of fig. 19 taken along line B-B.
Fig. 21 is a schematic perspective view of an embodiment of a connection structure of a power cell module of the present invention.
Fig. 22 is an exploded perspective view of a connection structure of the power battery module shown in fig. 21.
Fig. 23 is a plan view schematically showing a connection structure of the power cell module shown in fig. 21.
Fig. 24 is a cross-sectional view of the connection structure of the power cell module shown in fig. 23, taken along the line A-A.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be arbitrarily combined with each other.
The embodiment of the invention takes a vehicle-mounted power battery box as an example, and comprises a box body and a battery module positioned in the box body, wherein the battery module comprises a plurality of stacked module boxes, and a plurality of electric cores (namely battery cells) and at least one conductive electric core (namely a power battery module connecting structure for electrically connecting with adjacent power battery modules) are arranged in the module boxes. The module box comprises an upper cover and a lower cover, and the outer sides of the upper cover and the lower cover are respectively connected with the conducting strip and the insulating plate in a buckling manner. Two grooves are respectively arranged on the left side and the right side of the module box and are used for being clamped into the clamping strips when being combined, and convex rods matched with the clamping strips are correspondingly arranged in the grooves. The top edge of the module box is also provided with two grooves respectively for being clamped into the clamping strips during grouping, and the signal acquisition plates are fixed on the clamping strips. The copper-nickel conducting strip is pre-fixed with a tower spring, and is folded into the groove at the top edge, and the signal acquisition board is clamped into the groove along with the clamping strip and then contacts with the tower spring, so that electric connection is realized.
As shown in fig. 1 and 2, a power cell box according to an embodiment of the present invention generally includes: the battery comprises a box body 1, a battery module and a clamping strip 3.
A plurality of power battery modules 2 are fixedly arranged side by side to form a battery module, a plurality of electric cores are arranged on the power battery modules 2, and the battery module is arranged in the box body 1 side by side; the clamping strip 3 clamps and fixes the power battery module 2 into a whole. The power battery module 2 is an integral structure at least comprising a module box, an electric core, a conductive sheet and an insulating sheet.
As shown in fig. 3 and 4, a module case of a power battery module 2 of the present invention includes: an upper cover 21 and a lower cover 22; the upper cover 21 is formed with one or more upper groove bodies 211 for mounting the battery cells 106; the lower cover 22 is formed with a lower groove 221 for mounting the battery cell corresponding to the upper groove 211; the upper cover 21 and the lower cover 22 are engaged. Wherein, can install one or more conductive electric core in the cell body.
The upper cover 21 is formed with a protruding buckle 231, the lower cover 22 is formed with a latch 232, and the latch 232 is provided with a slot 233 adapted to the buckle 231. The upper cover 21 and the lower cover 22 are engaged by the snap 231 and the snap groove 233 on the snap tongue 232. The positions of the buckle and the clamping tongue can be interchanged; the locking mode is not limited to the buckle, the locking tongue and the locking groove of the embodiment; the upper cover and the lower cover can be detachably fixed in a mode other than clamping.
An upper conductive sheet 241 for connecting one side electrode of the cell 106 is provided on the outer side of the upper cover 21 (i.e., the upper surface of the upper cover), and a lower conductive sheet 242 for connecting the other side electrode of the cell 106 is provided on the outer side of the lower cover 22 (i.e., the lower surface of the lower cover). An upper insulating sheet 251 is provided on the outer side of the upper conductive sheet 241 (i.e., the upper surface of the upper conductive sheet), and a lower insulating sheet 252 is provided on the outer side of the lower conductive sheet 242 (i.e., the lower surface of the lower conductive sheet). The conducting strips are used for realizing series-parallel connection among the multiple electric cores, and the insulating strips are used for avoiding the mutual contact of the conducting strips after the multiple modules are stacked, so that the conducting strips are arranged to be at least capable of completely covering the conducting strips, and only the edges of the conducting strips are shown in the figure because the conducting strips are covered by the insulating strips.
In this embodiment, the conducting strip is spacing on upper cover and lower cover through a plurality of fastener at upper cover and lower cover lateral surface edge to with the anodal or negative pole welded fastening connection of battery cell in the module box, the insulating piece is spacing on upper cover and lower cover through a plurality of fastener at upper cover and lower cover lateral surface edge also.
In order to realize the serial connection of each module in the battery module, the conductive sheet and the insulating sheet are further provided with a plurality of through holes (6 in this embodiment, as shown in fig. 3 and 4) corresponding to the positions for the conductive electric cores to pass through, the conductive electric cores can be arranged into the shapes of the electric cores, are arranged in the upper groove body and the lower groove body, and are electrically connected with the conductive electric cores in the adjacent modules through conductive pieces, so that the passage between the modules is realized.
The lower cover 22 is also formed with support posts 26 upwardly at the inner or peripheral sides thereof for supporting the upper cover 21, for uniformly supporting the upper cover 21, and the support posts are hollow, and the space for the support posts can help to prevent overheating of the battery area. The support column can be a plurality of support columns, including but not limited to support columns which only support the upper cover, support columns which are provided with clamping pieces at the top ends and are clamped with corresponding parts of the upper cover and have the detachable fixing function, and the like.
The upper cover 21 and the lower cover 22 are formed with a plurality of grooves 27 on the peripheral sides thereof, including a positioning groove for aligning and positioning up and down when a plurality of power battery modules 2 are stacked, and a clamping groove for clamping the plurality of power battery modules 2 into a fixing clamping strip after being stacked, wherein a protruding rod 271 is formed in the clamping groove so as to be in clamping connection with the clamping strip with a clamping hole.
Fig. 5-8 illustrate embodiments of the conductive sheet of the present invention.
As shown in fig. 5, the conductive sheet includes a base 41, and the base 41 is formed by combining a copper bar and a nickel sheet by welding, for example, laser welding. The base 41 is provided with a plurality of through holes 42 (as shown in fig. 6), and the through holes 42 are in one-to-one correspondence with the electric cells (not shown) arranged in the module case.
Fig. 6 is an enlarged partial view of the area a in fig. 5, showing the structure of one through hole 42. The base 41 is formed with a strip-shaped flange 43 located in the through hole 42, the strip-shaped flange 43 is formed by extending a nickel sheet, preferably toward the center of the through hole, the strip-shaped flange 43 is symmetrically arranged in the through hole 42, and arc grooves are formed at the joints of the strip-shaped flange 43 and the base 41. The strip-shaped flanges 43 are used for forming electrical connection with the positive and negative electrodes of the battery cell through welding and the like, the end part of each strip-shaped flange 43 is provided with two protruding points 44 (shown in fig. 6), and the 4 protruding points 44 at the center of the through hole are arranged to protrude towards the positive and negative electrode surfaces of the battery cell and become electrical connection points welded to the positive and negative electrodes of the battery cell.
The strip-shaped flange 43 can be provided with a strip-shaped hole 45 extending along the length direction of the strip-shaped flange 43 so as to reduce the strength of the strip-shaped flange and enable the salient points at the end parts of the strip-shaped flange to be pressed and attached to the positive and negative electrode surfaces of the battery cell more easily; meanwhile, if current overload occurs, the strip-shaped flange with the strip-shaped holes is easier to fuse, so that the safety is improved; in addition, since the elongated holes are formed, the area where the welding current is dispersed is small, and it is easier to concentrate on the 4 bumps 44.
Wherein, the bump can be formed by stamping, the height of the bump is preferably 0.2-0.4mm, and the diameter is preferably 1-1.5mm, so as to facilitate processing and ensure electrical connection after welding. The strip hole can be provided with a straight section, so that the strip flange forms two sections of parallel straight arms, and both sides of the straight arms are in straight shapes, thereby ensuring that the straight arms are easier to fuse when current is overloaded.
To accommodate electrical connection between copper-nickel conductive pads or with signal acquisition boards, copper-nickel conductive pads may include a variety of different forms, for example, some copper bars may be provided with conductive sleeves to connect with conductive cores to complete electrical conduction between modules; some copper bars are provided with conductive columns, some copper bars are provided with conductive column sleeves, and the conductive column sleeves and the copper bar sleeves are arranged on adjacent modules to realize the conduction between the modules; some copper bars are provided with female inserts and are connected with the wire harness heads, and tower springs are fixed on the copper bars in advance to realize electric connection with the signal acquisition plate.
Fig. 7 is a schematic view of the structure of one embodiment of the copper-nickel conductive sheet with conductive sleeve of the present invention. Wherein reference numeral 7 denotes a torsion spring and reference numeral 5 denotes a conductive sleeve.
The torsion spring 7 is mounted on a bending piece 47 extending outwardly from the base 41 and bending in a direction perpendicular to the base 41. The bending sheet 47 is folded into a top edge groove of the module box and is contacted with a contact point, such as a tower spring, a conductive wafer and the like, preset on the signal acquisition board, so that the copper-nickel conductive sheet is electrically connected with the signal acquisition board and is used for acquiring temperature signals, voltage signals and the like of the power battery.
The conductive sleeve 5 is mounted on an extension piece 46 extending outwards from the base 41, and comprises a conductive sleeve and a conductive spring built in the conductive sleeve, and is electrically connected with the conductive sleeve on another module through a conductive core, so that the conduction between the modules is realized. The conductive spring can be a ring-shaped structure wound by a conductive coil, has elasticity and can keep electric connection when jolting. Wherein the conductive core may be arranged at the position of one of the electric cores in the power battery module 2, one end of the conductive core may be arranged to be connected with a conductive sleeve, the other end of the conductive sleeve may be arranged to be connected with a separate conductive sleeve, the other end of the separate conductive sleeve is also connected with the conductive core on the other power battery module 2, and the electrical connection between the two modules is realized through the conductive sleeve on the other power battery module 2.
Fig. 8 is a schematic structural view of one embodiment of a copper-nickel conductive sheet with female plug of the present invention. Wherein reference numeral 7 denotes a tower spring and reference numeral 9 denotes a female plug.
The relevant structure and function of the torsion spring 7 is as described above. The female plugs 9 are provided on the protruding pieces of the base 41, and one power battery module 2 has a pair of positive and negative female plugs 9. The female plug 9 is used for inserting a harness head to realize electrical connection between the two power battery modules 2 or between the power battery modules 2 and the high-voltage module. The harness head (not shown) comprises a shell, a plug seat, a compression spring and a conductive spring, and is inserted into the female plug 9 to realize electric connection.
In another embodiment, the bottom conductive sheet of one power battery module 2 is provided with a downward conductive column, and the top conductive sheet of the adjacent lower power battery module 2 is provided with a downward conductive column sleeve, and the two sleeves are sheathed to realize the conduction between the modules. Wherein, the conductive column sleeve comprises a conductive sleeve and a conductive spring therein.
Fig. 9-14 illustrate an embodiment of the conductive sleeve of the present invention as a component of a conductive electrical core, with which conductive cores of two adjacent power battery modules 2 are respectively sleeved, to effect electrical connection of the two power battery modules 2.
As shown in fig. 9-14, the conductive sleeve 5 comprises a sleeve 52, the sleeve 52 comprises a tubular casing 521, an annular limiting ring 522 is disposed in the middle of the outer wall of the casing 521, a conductive ring groove array formed by annular conductive ring grooves 523 and a sealing ring groove array formed by annular first sealing ring grooves 524 are disposed at two ends of the inner wall of the casing 521, a separable annular conductive spring 53 is disposed in each of the conductive ring grooves 523, and a separable annular first sealing ring 54 is disposed in each of the first sealing ring grooves 524. Wherein, electrically conductive spring and electrically conductive annular preferably interference fit, first sealing washer and first sealing annular preferably interference fit.
The sleeve 52 is made of copper, the first seal 54 is made of rubber, and the conductive spring 53 is a silver-plated spring.
When in use, two conductive cores can be sleeved at two ends, the conductive cores comprise a core barrel and a conductive core body in the core barrel, and the core body is contacted with a conductive spring in the conductive sleeve when in sleeve connection. The limiting rings on the outer wall of the sleeve are used for limiting the end edges of the conductive cores sleeved at the two ends.
In use, as shown in fig. 14, a pair of conductive ring grooves 523 and a sealing ring groove 524 are respectively provided at both ends of the inner wall of the sleeve 521, and of course, the number of the conductive ring grooves 523 and the first sealing ring grooves 524 may be increased or decreased as required. When the battery is connected, the elasticity of the conductive spring 53 is preferably set into an annular structure formed by winding a conductive coil (the conductive coil is wound along an annular path), and the conductive coil forms an annular hollow channel, so that the conductive coil can be compressed and deformed when being subjected to external force, the core body of the conductive core and the conductive spring can not influence the electric connection of the conductive core and the conductive spring even in a bumpy environment, the axial and radial follow-up performance of the conductive core and the conductive spring is improved, the phenomena of power failure, ignition and the like can not occur, and the connection is reliable and the practicability is strong.
Fig. 15-20 illustrate an embodiment of the conductive core of the present invention, wherein the conductive core is a component of the conductive core, and the conductive cores of two adjacent power battery modules 2 are respectively sleeved with a conductive sleeve, so as to realize the electrical connection of the two power battery modules 2.
As shown in fig. 15 to 20, the conductive core 6 includes a core barrel 62 and a core body 63. The core 62 comprises a cylindrical barrel 621, two ends of the inner wall of the barrel 621 are respectively provided with a sealing ring groove array formed by annular second sealing ring grooves 622, the second sealing ring grooves 622 are respectively provided with a separable second sealing ring 64, the core 63 comprises a cylindrical first core 631, two ends of the first core 631 are respectively provided with a cylindrical second core 632, the diameter of the second core 632 is smaller than that of the first core 631, the diameter of the first core 631 is adapted to the inner diameter of the barrel 621, and the diameter of the second core 632 is adapted to the inner diameter of the second sealing ring 64, wherein the second sealing ring is preferably in interference fit with the second sealing ring grooves and is preferably in interference fit with the second core.
Two ends of the cylinder 621 are respectively provided with a horn-shaped clamping interface 623 for facilitating the plugging operation of the core 63 and the conductive sleeve 521. The seal ring is preferably in an interference fit with the seal ring groove and is preferably in an interference fit with the second core.
The core 63 is made of copper, and the second seal 64 is made of rubber.
When in use, either end of the conductive core can be sleeved with a conductive sleeve, the inner wall of the conductive sleeve is provided with a conductive spring, and the second core 632 is contacted with the conductive spring in the conductive sleeve when in sleeve connection.
When in use, the conductive core is used as a battery and is arranged in the cover box to play a role of a conductive path. As shown in fig. 18, the user directly clamps two second sealing rings 64 into corresponding sealing ring grooves 622 respectively, the inner wall of each second sealing ring 64 is tightly attached to the outer wall of the second core 632 of the core 63, so as to seal the inside of the core 63, prevent the erosion of external water vapor, and have obvious effect and strong practicability.
Of course, the number of seal ring grooves 622 can be increased or decreased as needed to accommodate different operating environments.
Fig. 21-24 illustrate an embodiment of the connection structure (i.e., conductive cells) of the power cell module 2 of the present invention.
As shown in fig. 21 to 24, the connection structure comprises a conductive sleeve 5 and a conductive core 6, and the conductive core 6 is in plug connection with the conductive sleeve 5.
How to use the connection structure is described below.
As shown in fig. 23 and 24, a conductive sleeve 5 is interposed between two connected conductive cores 6, and the core 63 is directly inserted into the corresponding sleeve, so that the second core 632 of the core 63 is closely contacted with the pair of conductive springs 53, and the first seal ring 54 and the second seal ring 64 constitute a double seal structure. Wherein, the inner diameter and the outer diameter of the conductive spring 53 are respectively in interference fit with the inner wall of the sleeve 521 and the outer wall of the second core 632, so that the assembled conductive spring 53 is clamped; the inner diameter and the outer diameter of the first sealing ring 54 are respectively in interference fit with the inner wall of the sleeve 521 and the outer wall of the second core 632, so that the assembled first sealing ring 54 is clamped; the inner and outer diameters of the second sealing ring 64 are respectively in interference fit with the outer wall of the second core 632 and the inner wall of the cylinder 621, so that the assembled second sealing ring 64 is clamped. After assembly, the two ends of the limiting ring are respectively abutted by the ends of the two core barrels.
On the other hand, as shown in fig. 18 and 20, both ends of the seal ring groove 622 are provided with protrusions on the inner wall of the cylinder 621, so that both front and rear ends of the seal ring 64 are limited in the seal ring groove 622, and the advantages include: the outer end is limited, so that the end edge convex ring formed by the first core body being wider than the second core body is propped against, the core body is limited in the core barrel in the axial direction, and a certain axial buffer displacement is provided; the first core body and the cylinder body are preferably in clearance fit, a certain radial buffer displacement of the core body in the core cylinder can be realized by utilizing the sealing ring, the sleeve joint can be realized under the condition that the conductive sleeve and the conductive core are not completely aligned in the assembly process of the conductive sleeve and the conductive core, and an inclined plane clamping interface is preferably arranged at the joint of the conductive sleeve and the conductive core, such as the clamping interface 623 in fig. 20. In other embodiments, the first core may also be interference fit with the cartridge to limit.
The conductive sleeve, the core body and the conductive springs are made of conductive materials, and the core bodies of the two conductive cores can be electrically connected through the conductive springs at the two ends of the conductive sleeve. The conductive spring 53 of this embodiment is provided with elasticity, preferably with a ring-shaped structure (the conductive coil is wound along a ring-shaped path) formed by a conductive coil, and the conductive coil forms a ring-shaped hollow channel, so that the conductive coil can be compressed and deformed when being subjected to external force, so that even if the core 63 and the conductive spring 53 slide relatively in a bumpy environment, the electrical connection between two adjacent conductive cores N is not affected, the axial and radial follow-up performance of the two is improved, phenomena such as power failure and ignition are not generated, and the connection is reliable.
It should be noted that the number of the first sealing ring 54, the second sealing ring 64 and the conductive springs 53 may be increased or decreased as required, and the array in this embodiment is formed by arranging more than two related components in parallel. The overall structure and the internal detail structure of the conductive sleeve and the conductive core are not limited to a round shape, and can also be square and other structures, and at the moment, the detail structure of the conductive spring and the like can be square ring-shaped. The conductive spring 53 is not limited to the annular spring structure, and other elastic conductive elements may be used, such as a strip-shaped spring provided on the inner wall of the sleeve 521, or a plurality of groups of elastic conductive balls provided on the inner wall of the sleeve 521. In short, as long as the conductive member can maintain elastic close contact with the core 63.
The sleeve and the core body in this embodiment may be made of copper, the first sealing ring and the second sealing ring may be made of rubber, and the conductive spring may be a silver-plated spring.
The connection structure of the embodiment can be manufactured into the shape of a battery cell and installed in the groove body of the module box, and is used for electric connection between two power battery module 2 boxes composed of the battery cells, and can also be used for electric connection of other structures in a battery box.
The electrical connection manner of the power battery module 2 of the present invention may be, but is not limited to: the battery groove body in the module box is divided into a plurality of areas in advance, the positive and negative directions of the battery cells in each area are consistent, two conductive sheets are respectively welded and connected with the positive and negative electrodes of all the battery cells in the area to form a parallel structure of the battery cells, and then the same sides of the battery cells are adjacent
The two conductive sheets are arranged as a whole (such as the conductive sheet in fig. 5, the left half area is communicated with the anodes of the batteries, and the right half area is communicated with the cathodes of the batteries) or are communicated, so that series connection among the plurality of parallel structures is formed, and the battery cells in the true power battery module 2 are electrically connected. The whole power battery module 2 can lead out a positive electrode end and a negative electrode end, and can be used as the positive electrode end or the negative electrode end through a conductive column, a conductive column sleeve, a conductive sleeve, a female plug and the like which extend out of a conductive sheet, for example, the positive electrode end and the negative electrode end of two adjacent power battery modules 2 are arranged at adjacent positions, and can be connected in series through a pair of conductive columns and conductive column sleeves; if the connection structure is not arranged at adjacent positions (respectively positioned at the upper side and the lower side of the module box), the connection structure of the conductive sleeve and the conductive core can realize the series connection.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (19)
1. The conductive sheet is characterized by comprising a substrate, wherein a plurality of through holes are formed in the substrate, and strip-shaped flanges which are positioned in the through holes and used for electric connection are formed on the substrate; the base body is provided with a conductive tower spring; the tower spring is used for forming electric connection with the signal acquisition board;
the base body is provided with at least one of a conductive column, a conductive column sleeve, a female plug and a conductive sleeve, and the conductive sleeve is used for forming electric connection with the conductive core;
the conductive sleeve and the conductive core form a power battery connection structure; one or more elastic conductive pieces are arranged in the conductive sleeve; the conductive core comprises a core barrel and a conductive core body in the core barrel; the core body is detachably sleeved with the conductive sleeve, and the core body is contacted with the elastic conductive piece during the sleeving;
the elastic conductive piece is clamped by the outer wall of the core body and the inner wall of the conductive sleeve when the core body is sleeved with the conductive sleeve;
the inner wall of the conductive sleeve is provided with one or more conductive ring grooves, the elastic conductive piece is arranged in the conductive ring grooves, and the elastic conductive piece is in interference fit with the conductive ring grooves.
2. The conductive sheet of claim 1, wherein the torsion spring is provided on a bending piece extending outwardly from the base and bending in a direction perpendicular to the base.
3. The conductive sheet of claim 1 wherein the base is formed from a combination of copper bars and nickel sheets, and the torsion spring is secured to the copper bars.
4. The conductive sheet of claim 1 wherein the substrate is formed from a combination of copper bars and nickel sheets, and the strip-shaped flange is formed from the nickel sheets.
5. The conductive sheet according to claim 1, wherein the ends of the strip-shaped flanges are provided with raised bumps.
6. The conductive sheet of claim 5, wherein the strip-shaped flanges are provided with strip-shaped holes extending along the length direction of the strip-shaped flanges, and the end parts of each strip-shaped flange are provided with two protruding points which are respectively positioned at two sides of the strip-shaped holes.
7. The conductive sheet of claim 6 wherein the elongated aperture has a straight section and the strip flange forms two parallel straight arms.
8. The conductive sheet according to claim 7, wherein the bump is provided at a central position of the through hole, the bump having a bump height of 0.2 to 0.4mm and a diameter of 1 to 1.5mm.
9. The conductive sheet of claim 8, wherein the connection of the strip-shaped flange and the base is formed with a circular arc groove.
10. The conductive sheet of claim 1, wherein the elastic conductive member is a ring-shaped conductive spring.
11. The conductive sheet of claim 1, wherein the conductive sleeve comprises a sleeve, the sleeve comprising a sleeve, and the inner walls of the sleeve at both ends are respectively provided with one or more elastic conductive members.
12. The conductive sheet of claim 11, wherein the inner wall of the conductive sleeve is provided with at least one first sealing ring groove, the first sealing ring groove is provided between the elastic conductive member and the opening of the sleeve core, and a first sealing ring is provided in the first sealing ring groove.
13. The conductive sheet of claim 11 wherein the outer wall of the intermediate portion of the sleeve is further provided with an annular stop collar.
14. The conductive sheet of claim 12 or 13, wherein the core comprises a first core and a second core at both ends thereof, the second core having a smaller diameter than the first core, the first core having a diameter corresponding to the inner diameter of the core barrel, the second core being in socket connection with the sleeve of the conductive sleeve.
15. The conductive sheet of claim 14, wherein the core barrel comprises a barrel body, and at least one second sealing ring is respectively arranged on the inner walls of the two ends of the barrel body and the outer wall of the second core body.
16. The conductive sheet of claim 15, wherein the inner wall of the cylinder at the junction of the first core and the second core is provided with a second sealing ring groove, wherein protrusions of the inner wall of the cylinder are arranged at both ends of the second sealing ring groove, and the second sealing ring is limited in the second sealing ring groove.
17. A power cell module comprising an electrical core, wherein the power cell module further comprises a conductive sheet according to any one of claims 1-16 for electrically connecting the electrical core.
18. The power battery module of claim 17, wherein the power battery module comprises a module box, and two grooves are respectively arranged on the left side and the right side of the module box and are used for clamping the clamping strips when the module box is assembled, and a signal acquisition board is fixed on the clamping strips and contacts with the tower springs after the signal acquisition board is clamped into the clamping grooves along with the clamping strips to realize electric connection.
19. A power battery box comprising a box body and a battery module, wherein the battery module is arranged in the box body, and the battery module is characterized in that a plurality of battery modules as claimed in claim 17 which are fixedly arranged side by side form the battery module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110768422.3A CN113675516B (en) | 2016-11-16 | 2016-11-16 | Conducting strip, power battery module and power battery box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110768422.3A CN113675516B (en) | 2016-11-16 | 2016-11-16 | Conducting strip, power battery module and power battery box |
| CN201611032443.4A CN108075051B (en) | 2016-11-16 | 2016-11-16 | Power battery module and power battery box with same |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611032443.4A Division CN108075051B (en) | 2016-11-16 | 2016-11-16 | Power battery module and power battery box with same |
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| Publication Number | Publication Date |
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| CN113675516A CN113675516A (en) | 2021-11-19 |
| CN113675516B true CN113675516B (en) | 2024-02-13 |
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| CN201611032443.4A Active CN108075051B (en) | 2016-11-16 | 2016-11-16 | Power battery module and power battery box with same |
| CN202110768413.4A Pending CN113675515A (en) | 2016-11-16 | 2016-11-16 | Conducting strip, power battery module and power battery box |
| CN202110768422.3A Active CN113675516B (en) | 2016-11-16 | 2016-11-16 | Conducting strip, power battery module and power battery box |
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| CN201611032443.4A Active CN108075051B (en) | 2016-11-16 | 2016-11-16 | Power battery module and power battery box with same |
| CN202110768413.4A Pending CN113675515A (en) | 2016-11-16 | 2016-11-16 | Conducting strip, power battery module and power battery box |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109004167B (en) * | 2018-06-15 | 2023-12-01 | 宁德时代新能源科技股份有限公司 | battery module |
| CN114284616A (en) * | 2021-12-31 | 2022-04-05 | 苏州科易新动力科技有限公司 | Welding-free battery module |
| CN114552131B (en) * | 2022-02-28 | 2023-03-21 | 三一锂能有限公司 | Electric connector assembly, battery box system and electric operation machine |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108075051B (en) | 2021-07-23 |
| CN108075051A (en) | 2018-05-25 |
| CN113675515A (en) | 2021-11-19 |
| CN113675516A (en) | 2021-11-19 |
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