CN113675522A - Lithium battery suitable for being used by aquatic equipment - Google Patents
Lithium battery suitable for being used by aquatic equipment Download PDFInfo
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- CN113675522A CN113675522A CN202110954178.XA CN202110954178A CN113675522A CN 113675522 A CN113675522 A CN 113675522A CN 202110954178 A CN202110954178 A CN 202110954178A CN 113675522 A CN113675522 A CN 113675522A
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- battery cell
- module
- bottom shell
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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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- 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
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
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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
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
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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
- H01M50/256—Carrying devices, e.g. belts
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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
- H01M50/258—Modular batteries; Casings provided with means for assembling
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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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/383—Flame arresting or ignition-preventing means
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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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/394—Gas-pervious parts or elements
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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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/583—Devices or arrangements for the interruption of current in response to current, e.g. fuses
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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
Abstract
The invention relates to a lithium battery suitable for use in an underwater device, comprising: the upper shell is connected to the top of the bottom shell; more than one battery cabin for placing the battery cell modules is arranged in the bottom shell; a wiring cabin is arranged in the bottom shell; a module waterproof cover is arranged on the battery cabin; the battery cell module is covered in the battery cabin by the module waterproof cover, and a bottom shell fixing screw column matched with a module fixing screw column on the battery cell module is arranged in the bottom shell; the side edge of the module waterproof cover is connected with a BMS protection plate through a protection plate bracket; the battery core module is independently waterproof and sealed in the battery, the BMS protection plate is independently filled with glue for sealing and waterproofing, and the bottom shell and the upper shell are sealed and waterproof again, so that even if the first layer of battery shell leaks water, the internal battery cannot be seriously damaged; and the glue is not needed to be poured into the whole current machine, so that a good waterproof effect can be realized, the whole weight of the battery is reduced, and the battery is very suitable for underwater equipment.
Description
Technical Field
The invention relates to the field of storage battery energy, in particular to a lithium battery suitable for being used by underwater equipment.
Background
Along with the development of new energy equipment such as electric motor car, logistics robot, electric ship, the use of lithium cell is more and more extensive, and the majority lithium cell in the existing market, the product of road trip class is used more, and its technique is more mature, but the battery product that equipment used in aqueous to the anti-vibration shock resistance and waterproof performance then the higher requirement that puts forward.
The existing common consumer electronic products are basically used in the living environment, the performance indexes of water resistance, vibration resistance and the like are relatively low, but for the products used in water, the water immersion pressure is higher than the atmospheric pressure, and the risk of water inflow is higher; in addition, the waves in the water surface are different in size, and the impact, the vibration strength and the destructive power generated on the product are higher than those of the daily life; in addition, impurities in the water have larger corrosion damage capability to the shell and some metal devices. Therefore, most consumer battery products cannot meet the use requirements of aquatic equipment.
Disclosure of Invention
First, technical problem to be solved
In order to solve the problems in the prior art, the invention provides a lithium battery suitable for underwater equipment, which has a reliable structure and good waterproof and sealing performances.
Second, technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
a lithium battery suitable for use with an in-water device, comprising: the upper shell is connected to the top of the bottom shell; more than one battery cabin for placing the battery cell modules is arranged in the bottom shell; a wiring cabin used for wiring with the battery cell module is arranged in the bottom shell; a module waterproof cover is arranged on the battery cabin; the battery core module is covered in the battery cabin by the module waterproof cover;
a bottom shell fixing screw column matched with a module fixing screw column on the battery cell module is arranged in the bottom shell, and when the battery cell module is connected in the battery cabin, the module fixing screw column is matched with the bottom shell fixing screw column and is locked by a screw;
the side edge of the module waterproof cover is connected with a BMS protection plate through a protection plate bracket, and the BMS protection plate is positioned in the wiring cabin; and a waterproof explosion-proof valve is arranged on the bottom shell.
Furthermore, the battery cell module comprises a battery cell upper support and a battery cell lower support, and a lower mounting hole matched with the lower part of the square battery cell is formed in the battery cell lower support; an upper mounting hole matched with the upper part of the square battery cell is formed in the battery cell upper support, and the upper mounting hole is matched with the lower mounting hole to form an assembling hole for assembling the square battery cell; the battery cell upper bracket is provided with a first mounting groove for mounting a battery cell serial copper bar, and the first mounting groove is communicated with the upper mounting hole; the battery cell upper bracket is provided with a second mounting groove for mounting a battery cell output copper bar, the second mounting groove is communicated with the upper mounting hole, and the battery cell output copper bar conveniently located in the second mounting groove is electrically connected with the square battery cell.
Furthermore, positioning ribs are respectively arranged in the first mounting groove and the second mounting groove, and positioning grooves corresponding to the positioning ribs are respectively arranged on the battery cell serial copper bar and the battery cell output copper bar.
Furthermore, the battery cell output copper bar comprises a copper bar plate, a welding groove is formed in the copper bar plate, an output terminal is connected to the welding groove, and an internal thread is formed on the output terminal; the outer wall of output terminal is formed with annular seal circle groove, annular seal circle inslot is connected with the copper bar sealing washer, and the copper bar sealing washer cooperatees with the copper bar seal groove on the module waterproof cover.
Furthermore, an upper support locking stud is connected to the upper support of the battery cell through a module fixing stud, a lower support locking stud matched with the upper support locking stud is connected to the lower support of the battery cell, and when the upper support of the battery cell is connected with the lower support of the battery cell, the upper support locking stud is connected with the lower support locking stud and is locked by a screw; the module fixing screw column is used for fastening the battery cell module in the bottom shell; a flexible damping gasket with gum is arranged in the lower mounting hole; a third mounting groove for mounting a temperature switch is formed in the battery cell upper support; the battery cell series copper bar is punched to form a cross section in a shape like a Chinese character 'ji'.
Furthermore, an output connector connected with the BMS protection board is connected in the wiring cabin, the output connector comprises a connector sealing ring connected in a step hole of the bottom shell assembly column, an inner connector is connected in an inner hole in the middle of the connector sealing ring, the inner connector comprises a lower connecting column connected on the inner hole of the connector sealing ring, a limiting platform is formed on the upper end surface of the lower connecting column, and the middle part of the upper end surface of the limiting platform extends upwards to form an upper connector screw rod; the lower connecting column is connected with a first outer connector connected with an external wiring harness, the first outer connector comprises a connector lower screw rod connected with the lower connecting column, a lower connecting portion is formed at the lower end portion of the connector lower screw rod, and a lower connecting inner hole is formed in the lower connecting portion.
Further, a second outer connector is connected to the first outer connector, the second outer connector comprises an upper connecting part connected into the lower connecting inner hole, and the lower end of the upper connecting part extends downwards to form an outer connecting part; the inner wall of the lower connecting inner hole is provided with a plurality of elastic convex ribs at intervals for connecting the upper connecting part; mounting grooves are formed in the inner bottom of the lower connecting inner hole and the bottom of the outer connecting part respectively; the upper end surfaces of the lower connecting part and the outer connecting part are respectively provided with a second annular convex rib; an internal threaded hole is formed in the center of the lower connecting column; a first external connector connected with an external wiring harness is connected in the internal thread hole; a glue applying groove is formed in the limiting platform and is matched with a glue applying platform on the bottom shell assembly column to form a sealing ring groove for applying glue; the cross section of the lower connecting column is a polygonal or elliptical cylindrical rod with a positioning structure; the cross section of the connector sealing ring is I-shaped, and sealing ring limiting surfaces connected with the bottom shell assembly column are formed on two sides of the connector sealing ring; the two sides of the lower connecting column are respectively connected with a lower connecting column limiting surface matched with the sealing ring limiting surface; two sides of the limiting platform are respectively provided with a platform limiting surface matched with the bottom shell assembling column; the bottom of the limiting platform is provided with a first annular convex rib.
Furthermore, a fuse assembly connected with a BMS protection board is connected in the wiring cabin, the fuse assembly comprises a fuse cabin arranged at the bottom of the bottom shell, a fuse is connected in the fuse cabin, a fuse cabin cover is connected on the fuse cabin, and the fuse cover covers the fuse in the fuse cabin; the electrode post assembly is connected in the bottom shell, the upper portion of the electrode post assembly is located on the inner side of the bottom shell, and the lower portion of the electrode post assembly is connected with the fuse.
Further, the electrode column assembly includes an electrode column connected to the mounting hole of the bottom case; the electrode column comprises a fixed block connected in the mounting hole, the upper end and the lower end of the fixed block extend to form an upper limiting block and a lower limiting block respectively, and the upper limiting block and the lower limiting block extend outwards to form an upper fuse screw and a lower fuse screw respectively; the fixing block is provided with a first limiting surface for limiting with the mounting hole; second limiting surfaces which limit the bottom shell are formed on the upper limiting block and the lower limiting block respectively; the upper limiting block and the lower limiting block are respectively provided with a glue beating table matched with the bottom shell, and the glue beating table is matched with the bottom shell to form a glue groove; the lower fuse screw of the electrode column assembly is connected with the fuse sequentially through the copper flat gasket, the spring gasket and the copper nut from inside to outside; the upper plane of the glue groove is lower than the upper plane of the glue beating table; and a fuse cabin sealing ring is arranged at the joint of the fuse cabin cover and the fuse cabin.
Furthermore, a shell sealing groove is formed in the top of the bottom shell and used for sealing between the upper shell and the bottom shell; the inner wall of the bottom shell is provided with a module sealing rubber groove, and when the module waterproof cover is connected to the battery compartment, a convex rib of the sealing groove at the bottom of the module waterproof cover is matched with the module sealing rubber groove to form sealing; the module waterproof cover is provided with a screw hole for installation; the module waterproof cover is provided with an NTC sealing rubber groove for mounting an NTC temperature sensor, and the module waterproof cover is provided with a tap sealing rubber groove for mounting a tap on the battery cell module; the module waterproof cover is provided with a temperature switch sealing rubber groove for installing a temperature switch; the module waterproof cover is provided with a copper bar sealing groove for mounting a battery cell output copper bar on the battery cell module; the module waterproof cover is provided with a waterproof breathable groove, and the waterproof breathable groove is provided with a waterproof breathable film; the protection shield support is provided with an assembly screw hole for assembly, the protection shield support is provided with a support rib and a protection shield buckle for positioning and supporting the BMS protection shield, the protection shield support is provided with a positioning support column for positioning the BMS protection shield, and the BMS protection shield is provided with a protection shield positioning hole matched with the positioning support column.
Third, beneficial effect
The invention has the beneficial effects that: 1. simple structure is reliable, and waterproof leakproofness is good.
2. The battery cell module is independently sealed in the battery in a waterproof way, the BMS protection plate is independently sealed and waterproof in a glue filling way, and the bottom shell and the upper shell are sealed and waterproof again, so that even if the first layer of battery shell leaks water, the internal battery cannot be seriously damaged; and the glue is not needed to be poured into the whole battery, so that a good waterproof effect can be realized, the whole weight of the battery is reduced, and the battery is very suitable for underwater equipment.
3. The output electrode is strong in universality, can realize heavy-current load work, can replace a damaged electrode under the condition of not damaging a waterproof structure of the battery, and reduces the maintenance difficulty and cost.
4. The fuse chamber with the waterproof structure can replace a damaged fuse without damaging the waterproof structure of the battery, so that the maintenance difficulty and cost are reduced, and the safety of the battery is improved.
5. The inside waterproof ventilated membrane that adopts of electricity core module, battery case are equipped with waterproof explosion-proof valve, and 2 persons cooperate each other, under the prerequisite of guaranteeing module and the whole waterproof performance of battery, realize in the module with the battery in and the outer atmospheric pressure balance of battery and air exchange.
6. The handle belt structure is simple, and the dismouting is easy, and handle pulling force is direct atress on the drain pan rather than the epitheca, prevents effectively to carry and draws the epitheca to cause the epitheca to warp waterproof inefficacy.
Drawings
FIG. 1 is a schematic structural diagram of one embodiment of the present invention;
FIG. 2 is a schematic view of a bottom case structure according to an embodiment of the present invention;
FIG. 3 is a schematic view of a waterproof cover module according to an embodiment of the present invention;
FIG. 4 is a schematic view of a protective plate holder according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a cell module according to an embodiment of the present invention;
fig. 6 is an exploded view of a cell module structure according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a structure of a cell output copper bar according to an embodiment of the present invention;
fig. 8 is a sectional view of a structure of a cell output copper bar according to an embodiment of the present invention;
FIG. 9 is a schematic view of a junction box configuration according to an embodiment of the present invention;
FIG. 10 is a cross-sectional view of an output connector configuration in accordance with one embodiment of the present invention;
FIG. 11 is a front view of a female connector structure according to one embodiment of the present invention;
FIG. 12 is a bottom view of the female connector structure of one embodiment of the present invention;
figure 13 is a front view of a second external connector arrangement according to one embodiment of the present invention;
FIG. 14 is a bottom plan view of a second external connector structure in accordance with one embodiment of the present invention;
FIG. 15 is an assembly view of the fuse assembly structure of one embodiment of the present invention;
FIG. 16 is a bottom view of the fuse assembly structure of one embodiment of the present invention;
FIG. 17 is a cross-sectional view of a fuse assembly construction according to one embodiment of the invention;
fig. 18 is a schematic view of an electrode column structure according to an embodiment of the present invention.
Detailed Description
For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings.
A lithium battery according to an embodiment of the present invention, as shown in fig. 1 to 18, includes: the bottom shell 1 and the upper shell 101, wherein the upper shell 101 is connected to the top of the bottom shell 1; the top of the bottom shell 1 is provided with a shell sealing groove 13 for sealing between the upper shell 101 and the bottom shell 1; more than one battery cabin 4 for placing the battery cell module 3 is arranged in the bottom shell 1; a wiring cabin 5 for wiring with the battery cell module 3 is arranged in the bottom shell 1; the inner wall of the bottom shell 1 is provided with a module sealing rubber groove 12, and the battery cabin 4 is provided with a module waterproof cover 2; the battery core module 3 is covered in the battery cabin 4 by the module waterproof cover 2, and when the module waterproof cover 2 is connected to the battery cabin 4, the convex rib 27 of the sealing groove at the bottom of the module waterproof cover 2 is matched with the module sealing rubber groove 12 to form sealing; a handle belt 102 for convenient lifting is connected to the bottom shell 1; an infrared communication window 105 is arranged on the bottom shell 1, and a waterproof and explosion-proof valve 106 is arranged on the bottom shell 1; the module waterproof cover 2 is provided with an air tightness detection port, so that the air tightness of the battery module can be detected.
As shown in fig. 3 and 4, a bottom case fixing screw column 11 matched with a module fixing screw column 301 on the battery cell module 3 is arranged in the bottom case 1, and when the battery cell module 3 is connected in the battery compartment 4, the module fixing screw column 301 is matched with the bottom case fixing screw column 11 and locked by a screw; the module waterproof cover 2 is provided with a screw hole 21 for installation; an NTC sealing rubber groove 22 for installing an NTC temperature sensor is arranged on the module waterproof cover 2, and a tap sealing rubber groove 23 for installing a tap on the battery cell module 3 is arranged on the module waterproof cover 2; the module waterproof cover 2 is provided with a temperature switch sealing rubber groove 24 for installing a temperature switch 39; the module waterproof cover 2 is provided with a copper bar sealing groove 25 for mounting a battery cell output copper bar 36 on the battery cell module 3; a waterproof breathable groove 26 is formed in the module waterproof cover 2, and a waterproof breathable film 6 is arranged on the waterproof breathable groove 26; the side edge of the module waterproof cover 2 is connected with a BMS protection plate 104 through a protection plate bracket 103, and the BMS protection plate 104 is positioned in the wiring cabin 5; the protection board support 103 is provided with an assembly screw 1031 for assembly, the protection board support 103 is provided with a support rib 1032 and a protection board buckle 1034 for positioning and supporting the BMS protection board 104, the protection board support 103 is provided with a positioning support column 1033 for positioning the BMS protection board 104, and the BMS protection board 104 is provided with a protection board positioning hole 1041 matched with the positioning support column 1033.
As shown in fig. 5, fig. 6, fig. 7, and fig. 8, the battery cell module 3 includes a battery cell upper support 31 and a battery cell lower support 32, and a lower mounting hole 322 matched with the lower portion of the square battery cell 33 is formed in the battery cell lower support 32; an upper mounting hole 313 matched with the upper part of the square battery cell 33 is formed in the battery cell upper bracket 31, and the upper mounting hole 313 is matched with the lower mounting hole 322 to form an assembling hole for assembling the square battery cell 33; the battery cell upper bracket 31 is provided with a first mounting groove 314 for mounting the battery cell serial copper bar 35, and the first mounting groove 314 is communicated with the upper mounting hole 313; the battery cell upper bracket 31 is provided with a second mounting groove 315 for mounting the battery cell output copper bar 36, the second mounting groove 315 is communicated with the upper mounting hole 313, and the battery cell output copper bar 36 positioned in the second mounting groove 315 is conveniently electrically connected with the square battery cell 33. Positioning ribs 37 are respectively arranged in the first mounting groove 314 and the second mounting groove 315, and positioning grooves 38 corresponding to the positioning ribs 37 are respectively arranged on the battery cell serial copper bar 35 and the battery cell output copper bar 36. The battery core output copper bar 36 comprises a copper bar plate 361, a welding groove 362 is arranged on the copper bar plate 361, an output terminal 363 is connected to the welding groove 362, and an internal thread 364 is formed on the output terminal 363. An annular sealing ring groove 365 is formed in the outer wall of the output terminal 363, a copper bar sealing ring 366 is connected in the annular sealing ring groove 365, and the copper bar sealing ring 366 is matched with the copper bar sealing groove 25. The cell upper support 31 is connected with an upper support locking stud 312 through a module fixing stud 301, the cell lower support 32 is connected with a lower support locking stud 321 matched with the upper support locking stud 312, and when the cell upper support 31 is connected with the cell lower support 32, the upper support locking stud 312 is connected with the lower support locking stud 321 and locked by a screw; the module is fixed with screw post 301 and is used for fastening the battery cell module in the drain pan. The lower mounting hole 322 is internally provided with a flexible shock absorption gasket 34 with gum. And a third mounting groove for mounting a temperature switch 39 is formed in the battery cell upper bracket 31. The battery cell series copper bar 35 is formed into a cross section shaped like a Chinese character 'ji' by stamping.
In the embodiment, the square battery cells 33 are connected in series by using the battery cell series copper bars 35, and the battery cell series copper bars 35 and the lugs of the square battery cells 33 are welded together by matching with a laser welding process; the battery cell serial copper bar 35 is provided with a cross section shaped like a Chinese character 'ji' through a stamping forming process, so that the battery cell serial copper bar 35 has better anti-seismic performance; in addition, a positioning groove 38 for positioning is designed on the battery cell serial copper bar 35 to match with a positioning rib 37 of the battery cell upper support 31, so that accurate and firm welding of the battery cell serial copper bar 35 and the lug of the square battery cell 33 in positioning is ensured.
The assembled battery cell module can be placed into a battery compartment of the bottom shell, and the battery cell modules can be further connected in series and parallel to each other so as to achieve required battery voltage and capacity. The copper bar that the anodal and negative pole output of electricity core module welded is called electric core output copper bar, and it is compared with electric core series connection copper bar, has increased an output terminal on with electric core utmost point ear welding plane, and output terminal and copper bar plane can be a whole through the welding, also can adopt the mode of metal die-casting or NC processing to obtain integrative output copper bar goods that take shape.
As shown in fig. 9, 10, 11, 12, 13 and 14, an output connector connected to the BMS protection plate 104 is connected to the inside of the wire connecting compartment 5, the output connector includes a connector sealing ring 52 connected to the stepped hole of the bottom housing assembly post 51, an inner connector 53 is connected to the inside hole 521 in the middle of the connector sealing ring 52, the inner connector 53 includes a lower connecting post 531 connected to the inside hole 521 of the connector sealing ring 52, an upper end surface of the lower connecting post 531 forms a limiting platform 532, and a middle portion of an upper end surface of the limiting platform 532 extends upward to form a connector upper screw 533; the lower connecting column 531 is connected with a first outer connector 54 connected with an external wire harness, the first outer connector 54 comprises a connector lower screw 541 connected with the lower connecting column 531, a lower connecting portion 542 is formed at the lower end portion of the connector lower screw 541, and a lower connecting inner hole 543 is formed in the lower connecting portion 542. The first outer connector 54 is also connected with a second outer connector 55, the second outer connector 55 includes an upper connecting portion 551 connected in the lower connecting inner hole 543, and a lower end of the upper connecting portion 551 extends downward to form an outer connecting portion 552. The inner wall of the lower connecting inner hole 543 is provided with a plurality of elastic ribs 544 at intervals for connection of the upper connecting portion 551. The inner bottom of the lower connecting inner hole 543 and the bottom of the outer connecting portion 552 are formed with mounting grooves 56, respectively. The upper end surfaces of the lower connecting portion 542 and the outer connecting portion 552 are respectively provided with a second annular rib 5421. An internal threaded hole 5311 is formed in the center of the lower connecting column 531; the internally threaded hole 5311 is internally connected with a first external connector 54 connected with an external harness. The limiting platform 532 is provided with a gluing groove 534, and the gluing groove 534 is matched with the gluing platform 511 on the bottom shell assembly column 51 to form a sealing ring groove for gluing. The cross section of the lower connecting column 531 is a polygonal or elliptical cylindrical rod with a positioning structure; the cross-sectional shape of the connector sealing ring 52 is an i-shape, and sealing ring limiting surfaces 522 connected with the bottom case assembling column 51 are formed on both sides of the connector sealing ring 52. The two sides of the lower connecting column 531 are respectively connected with a lower connecting column limiting surface 535 matched with the sealing ring limiting surface 522. Two sides of the limiting platform 532 are respectively provided with a platform limiting surface 536 matched with the bottom shell assembling column 51; the bottom of the position-limiting platform 532 is formed with a first annular rib 5321.
In this embodiment, the bottom shell assembly column 51 that is engaged with the inner connector 53 and the first outer connector 54 is a multi-layer concentric column hole structure, the section of the middle through hole is the same as the outer side surface of the connector seal ring 52, and the two are also in close fit in size fit; the upper side of the through hole is fitted with the inner connector 53, and the lower side of the through hole is fitted with the first outer connector 54; mating with the first outer connector 54 as a flat surface that mates with the bottom edge of the "I" of the connector seal 52; three step surfaces are designed in the upward direction matched with the inner connector 53; the first step surface mates with the top edge of the "i" of the connector seal ring 52; the second step surface mates with the bottom edge of the limit platform 532 of the inner connector 53; a third step surface, the bottom surface of which is close to or the same as the bottom edge of the limiting platform 532 of the inner connector 53, and the top surface of which is located between the bottom edge and the top edge of the limiting platform 532 of the inner connector 53 and cannot be higher than the top edge of the limiting platform 532; under the design, then can form the concave station face that an encapsulating was used between electrode erection column on the drain pan and the internal connector 53 for the encapsulating is sealed, and because the top surface of electrode installation assembly will be less than the topside of the spacing platform 532 of internal connector 53, the face of gluing after consequently the encapsulating can not be higher than the plane of the spacing platform 532 topside of internal connector 53, when guaranteeing the top surface and the pencil terminal locking connection of internal connector 53, can not cause contact failure because sealed glue in the middle of.
During assembly, firstly, the connector sealing ring 52 is assembled in the stepped hole of the bottom shell assembly column 51, and the connector sealing ring 52 and the stepped hole of the bottom shell assembly column 51 are in a close fit state; then, the lower connection column 531 of the inner connector 53 is inserted through the inner hole of the sealing ring, the lower connection column 531 and the inner hole of the sealing ring are also in a close fit state, the sealing ring has a slight extrusion deformation state in the gap between the bottom shell assembly column 51 and the lower connection column 531 of the inner connector 53, and the gap between the two is completely filled.
Then, the connector lower screw 541 of the first outer connector 54 is matched with the internal thread hole 5311 in the lower connecting column 531 of the inner connector 53, the first outer connector 54 and the inner connector 53 are locked and fixed by a screwdriver, and the lower connecting column 531 of the inner connector 53 is matched with the limiting surface of the bottom shell assembling column 51, so that the inner connector 53 can be kept fixed and cannot rotate when the first outer connector 54 is rotationally locked; the inner connector 53, the first outer connector 54 and the connector sealing ring 52 are locked together by further pressing the sealing ring at the upper and lower plane matching parts, namely the first annular convex rib 5321 and the second annular convex rib 5421, so that a better sealing effect is realized.
Finally, forming a gluing concave platform on the gluing platform 511 on the bottom shell assembly column 51 and the gluing groove 534 of the inner connector 53 to glue the pouring glue, and reinforcing, fixing and sealing the inner connector 53; the pouring sealant preferentially uses an epoxy resin sealant which has good sealing effect and high mechanical strength after being cured; the connector upper screw 533 at the upper portion of the inner connector 53 is electrically connected to the wire harness inside the battery.
The inner connector 53 after the assembly and the sealing washer have the drain pan to become a whole in addition, first outer connector 54 then can easily install and remove the change through the screwdriver, under the heavy current load, as the outer connector 55 of second of female seat, inside elasticity protruding muscle 544 is very easy to damage, and if change when untimely after elasticity protruding muscle 544 damages, it is very serious to generate heat under the heavy current load, damage the risk that battery case catches fire even, former connector, need tear quick-witted whole change open, the operation is complicated with high costs, adopt this scheme then can easily change the first outer connector 54 part of damage alone, can reach the restoration effect.
According to actual needs, the second external connector 55 of the male connector is replaced by the first external connector 54 of the female connector, and the universality of the battery cells of different products can be realized within a certain range.
Further, in the above solution, the screw and the internal screw hole structures used for the internal connector 53 and the first external connector 54 may be interchanged according to actual needs, and are not completely fixed.
As shown in fig. 15, 16, 17 and 18, a fuse assembly connected to the BMS protection board 104 is connected to the inside of the wire compartment 5, the fuse assembly includes a fuse compartment 62 disposed at the bottom of the bottom case 1, a fuse 63 is connected to the inside of the fuse compartment 62, a fuse compartment cover 64 is connected to the fuse compartment 62, and the fuse compartment cover 64 covers the fuse 63 in the fuse compartment 62; an electrode column assembly is connected in the bottom shell 1, the upper part of the electrode column assembly is positioned on the inner side of the bottom shell 1, and the lower part of the electrode column assembly is connected with a fuse 63. The electrode column assembly includes an electrode column 69 coupled to the mounting hole 611 of the bottom case 1; the electrode column 69 comprises a fixing block 691 connected in the mounting hole 611, the upper end and the lower end of the fixing block 691 extend to form an upper limiting block 692 and a lower limiting block 696, and the upper limiting block 692 and the lower limiting block 696 extend outwards to form an upper fuse screw rod 693 and a lower fuse screw rod 694. The fixing block 691 is provided with a first limiting surface 697 which is limited with the mounting hole 611. The upper limiting block 692 and the lower limiting block 696 are respectively formed with a second limiting surface 695 for limiting with the bottom case 1. The upper limiting block 692 and the lower limiting block 696 are respectively provided with a glue beating platform 698 matched with the bottom shell 1, and the glue beating platform 698 is matched with the bottom shell 1 to form a glue groove 610. The fuse lower screw 694 of the electrode column assembly is connected with the fuse 63 sequentially through the copper flat gasket 66, the spring gasket 67 and the copper nut 68 from inside to outside. The upper plane of the glue groove 610 is lower than the upper plane of the glue dispensing table 698. A fuse chamber sealing ring 65 is arranged at the joint of the fuse chamber cover 64 and the fuse chamber 62.
Further, go up limit piece 692 and limit piece 696 on be formed with respectively and beat with drain pan 1 matched with and glue platform 698, beat and glue platform 698 and drain pan 1 and cooperate and form gluey groove 610, the last plane of gluey groove 610 is lower than beating gluey platform 698 upper plane, because of the height of a little encapsulating can not be higher than beating gluey platform 698, can not cause electrode post and pencil terminal electrical connection bad contact.
Furthermore, a fuse lower screw 694 of the electrode column assembly is connected with the fuse 63 through the copper flat gasket 66, the spring gasket 67 and the copper nut 68 in sequence from inside to outside, current is directly conducted to the fuse from the inside of the battery through the electrode column and then flows back to the inside of the current, the path is shortest, no redundant wiring harness flows and is routed, and the structure is simple and reliable.
In this embodiment, the upper fuse screw 693 and the lower fuse screw 694 are replaced by a double-screw structure or a male-female screw structure according to actual needs, and the use is flexible.
In the embodiment, the electrode column 69 is embedded in the plastic bottom case 1 by adopting the production process of encapsulation injection molding; a sealing rubber groove is designed on the fuse cabin cover, and after the fuse cabin cover is assembled, the sealing ring is extruded and deformed, so that a complete sealing environment is formed in the fuse cabin. The shell and the fuse cabin are mutually isolated and sealed, and even if the fuse cabin cover is filled with water, the waterproof performance inside the battery cannot be influenced, so that the battery is dangerous.
In this embodiment, when the fuse breaks down and needs to be changed, only need demolish fuse hatch cover screw, can open the cabin, unscrew the nut and pull down, change the fuse, later only need the check nut whether to lock, whether the hatch cover sealing washer damages, can return the hatch cover dress, need not dismouting battery case, does not destroy battery inner waterproof structure, and safe and reliable is convenient.
In this embodiment, in order to meet the requirement of repeated disassembly and assembly of the hatch cover, the machine thread screw is preferably selected as the hatch cover screw, and the nut can be embedded into the battery shell by adopting a packaging injection molding process or a hot riveting process, so that the problem that the screw hole can not be reused due to thread slipping after the self-tapping screw is used for repeated disassembly and assembly is solved.
In this embodiment, for self inside waterproof of strengthening the fuse cabin, can also carry out the encapsulating to the fuse cabin alone and handle, here encapsulating can choose the good and easy silicon system embedment glue of clearing up of leakproofness earlier for use, when guaranteeing sealed waterproof performance, compromise and change the maintenance convenience.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (10)
1. A lithium battery suitable for use with an aquatic device, comprising: the device comprises a bottom shell (1) and an upper shell (101), wherein the upper shell (101) is connected to the top of the bottom shell (1); more than one battery cabin (4) for placing the battery cell module (3) is arranged in the bottom shell (1); a wiring cabin (5) for wiring with the battery cell module (3) is arranged in the bottom shell (1); a module waterproof cover (2) is arranged on the battery cabin (4); the module waterproof cover (2) covers the battery cell module (3) in the battery cabin (4);
a bottom shell fixing screw column (11) matched with a module fixing screw column (301) on the battery cell module (3) is arranged in the bottom shell (1), and when the battery cell module (3) is connected into the battery compartment (4), the module fixing screw column (301) is matched with the bottom shell fixing screw column (11) and locked by a screw;
the side edge of the module waterproof cover (2) is connected with a BMS protection plate (104) through a protection plate bracket (103), and the BMS protection plate (104) is positioned in the wiring cabin (5); and a waterproof and explosion-proof valve (106) is arranged on the bottom shell (1).
2. A lithium battery suitable for use in an aquatic device according to claim 1, wherein: the battery cell module (3) comprises a battery cell upper support (31) and a battery cell lower support (32), and a lower mounting hole (322) matched with the lower part of the square battery cell (33) is formed in the battery cell lower support (32); an upper mounting hole (313) matched with the upper part of the square battery cell (33) is formed in the battery cell upper support (31), and the upper mounting hole (313) is matched with the lower mounting hole (322) to form an assembling hole for assembling the square battery cell (33); a first mounting groove (314) for mounting the battery cell serial copper bar (35) is formed in the battery cell upper support (31), and the first mounting groove (314) is communicated with the upper mounting hole (313); the battery cell upper bracket (31) is provided with a second mounting groove (315) for mounting a battery cell output copper bar (36), the second mounting groove (315) is communicated with the upper mounting hole (313), and the battery cell output copper bar (36) in the second mounting groove (315) is conveniently electrically connected with the square battery cell (33).
3. A lithium battery suitable for use in an aquatic device according to claim 2, wherein: and positioning ribs (37) are respectively arranged in the first mounting groove (314) and the second mounting groove (315), and positioning grooves (38) which are matched with the positioning ribs (37) and correspond to the electric core serial copper bar (35) and the electric core output copper bar (36) are respectively arranged on the electric core serial copper bar and the electric core output copper bar.
4. A lithium battery suitable for use in an aquatic device according to claim 2, wherein: the battery cell output copper bar (36) comprises a copper bar plate (361), a welding groove (362) is formed in the copper bar plate (361), an output terminal (363) is connected to the welding groove (362), and an internal thread (364) is formed in the output terminal (363); the outer wall of output terminal (363) is formed with annular seal ring groove (365), annular seal ring groove (365) in-connection has copper bar sealing washer (366), and copper bar sealing washer (366) cooperate with copper bar seal groove (25) on module waterproof cover (2).
5. A lithium battery suitable for use in an aquatic device according to claim 2, wherein: the battery cell upper support (31) is connected with an upper support locking stud (312) through a module fixing stud (301), the battery cell lower support (32) is connected with a lower support locking stud (321) matched with the upper support locking stud (312), and when the battery cell upper support (31) is connected with the battery cell lower support (32), the upper support locking stud (312) is connected with the lower support locking stud (321) and locked by a screw; the module fixing screw column (301) is used for fastening the battery cell module in the bottom shell; a flexible shock absorption gasket (34) with gum is arranged in the lower mounting hole (322); a third mounting groove for mounting a temperature switch (39) is formed in the battery cell upper bracket (31); the battery cell series copper bar (35) is punched to form a cross section shaped like a Chinese character 'ji'.
6. A lithium battery suitable for use in an aquatic device according to claim 1, wherein: an output connector connected with a BMS protection plate (104) is connected in the wiring cabin (5), the output connector comprises a connector sealing ring (52) connected in a step hole of a bottom shell assembly column (51), an inner connector (53) is connected in an inner hole (521) in the middle of the connector sealing ring (52), the inner connector (53) comprises a lower connecting column (531) connected on the inner hole (521) of the connector sealing ring (52), a limiting platform (532) is formed on the upper end face of the lower connecting column (531), and the middle part of the upper end face of the limiting platform (532) extends upwards to form a connector upper screw (533); be connected with first outer connector (54) that is connected with external pencil on lower spliced pole (531), screw rod (541) under first outer connector (54) including the connector of being connected with lower spliced pole (531), the lower tip of screw rod (541) is formed with down connecting portion (542) under the connector, be formed with down on lower connecting portion (542) and connect hole (543).
7. A lithium battery suitable for use in an aquatic device according to claim 6, wherein: the first outer connector (54) is also connected with a second outer connector (55), the second outer connector (55) comprises an upper connecting part (551) connected into a lower connecting inner hole (543), and the lower end of the upper connecting part (551) extends downwards to form an outer connecting part (552); the inner wall of the lower connecting inner hole (543) is provided with a plurality of elastic convex ribs (544) at intervals for connecting the upper connecting part (551); mounting grooves (56) are respectively formed at the inner bottom of the lower connecting inner hole (543) and the bottom of the outer connecting part (552); the upper end surfaces of the lower connecting part (542) and the outer connecting part (552) are respectively provided with a second annular convex rib (5421); an internal threaded hole (5311) is formed in the center of the lower connecting column (531); a first external connector (54) connected with an external wiring harness is connected in the internal thread hole (5311); a gluing groove (534) is formed in the limiting platform (532), and the gluing groove (534) is matched with a gluing platform (511) on the bottom shell assembly column (51) to form a sealing ring groove for gluing; the cross section of the lower connecting column (531) is a polygonal or elliptical cylindrical rod with a positioning structure; the cross section of the connector sealing ring (52) is I-shaped, and sealing ring limiting surfaces (522) connected with the bottom shell assembly column (51) are formed on two sides of the connector sealing ring (52); the two sides of the lower connecting column (531) are respectively connected with a lower connecting column limiting surface (535) matched with the sealing ring limiting surface (522); two sides of the limiting platform (532) are respectively provided with a platform limiting surface (536) matched with the bottom shell assembly column (51); the bottom of the limiting platform (532) is provided with a first annular convex rib (5321).
8. A lithium battery suitable for use in an aquatic device according to claim 1, wherein: the fuse assembly is connected with the BMS protection board (104) in the wiring cabin (5), the fuse assembly comprises a fuse cabin (62) arranged at the bottom of the bottom shell (1), a fuse (63) is connected in the fuse cabin (62), a fuse cabin cover (64) is connected to the fuse cabin (62), and the fuse (63) is covered in the fuse cabin (62) by the fuse cabin cover (64); an electrode column assembly is connected in the bottom shell (1), the upper portion of the electrode column assembly is located on the inner side of the bottom shell (1), and the lower portion of the electrode column assembly is connected with a fuse (63).
9. A lithium battery suitable for use in an aquatic device according to claim 8, wherein: the electrode column assembly comprises an electrode column (69) connected to a mounting hole (611) of the bottom shell (1); the electrode column (69) comprises a fixing block (691) connected in the mounting hole (611), the upper end and the lower end of the fixing block (691) extend to form an upper limiting block (692) and a lower limiting block (696), and the upper limiting block (692) and the lower limiting block (696) extend outwards to form an upper fuse screw (693) and a lower fuse screw (694) respectively; the fixing block (691) is provided with a first limiting surface (697) which is limited with the mounting hole (611); second limiting surfaces (695) which limit the bottom shell (1) are formed on the upper limiting block (692) and the lower limiting block (696) respectively; the upper limiting block (692) and the lower limiting block (696) are respectively provided with a glue beating table (698) matched with the bottom shell (1), and the glue beating table (698) is matched with the bottom shell (1) to form a glue groove (610); a fuse lower screw (694) of the electrode post assembly is connected with a fuse (63) sequentially through a copper flat gasket (66), a spring gasket (67) and a copper nut (68) from inside to outside; the upper plane of the glue groove (610) is lower than the upper plane of the glue beating table (698); and a fuse cabin sealing ring (65) is arranged at the joint of the fuse cabin cover (64) and the fuse cabin (62).
10. A lithium battery suitable for use in an aquatic device according to claim 1, wherein: the top of the bottom shell (1) is provided with a shell sealing groove (13) for sealing between the upper shell (101) and the bottom shell (1); the inner wall of the bottom shell (1) is provided with a module sealing rubber groove (12), and when the module waterproof cover (2) is connected to the battery cabin (4), a sealing groove convex rib (27) at the bottom of the module waterproof cover (2) is matched with the module sealing rubber groove (12) to form sealing; the module waterproof cover (2) is provided with a screw hole (21) for installation; an NTC sealing glue groove (22) for installing an NTC temperature sensor is formed in the module waterproof cover (2), and a tap sealing glue groove (23) for installing a tap on the battery cell module (3) is formed in the module waterproof cover (2); a temperature switch sealing rubber groove (24) for installing a temperature switch (39) is arranged on the module waterproof cover (2); the module waterproof cover (2) is provided with a copper bar sealing groove (25) for mounting a battery cell output copper bar (36) on the battery cell module (3); a waterproof ventilating groove (26) is formed in the module waterproof cover (2), and a waterproof ventilating film (6) is arranged on the waterproof ventilating groove (26); be equipped with assembly screw hole (1031) that is used for the assembly on protection shield support (103), be equipped with support rib (1032) and protection shield buckle (1034) that are used for the location support BMS protection shield (104) on protection shield support (103), be equipped with location support post (1033) that are used for BMS protection shield (104) location on protection shield support (103), be equipped with on BMS protection shield (104) with location support post (1033) matched with protection shield locating hole (1041).
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| CN202110954178.XA CN113675522B (en) | 2021-08-19 | 2021-08-19 | Lithium battery suitable for underwater equipment |
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