CN113675522B - Lithium battery suitable for underwater equipment - Google Patents
Lithium battery suitable for underwater equipment Download PDFInfo
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- CN113675522B CN113675522B CN202110954178.XA CN202110954178A CN113675522B CN 113675522 B CN113675522 B CN 113675522B CN 202110954178 A CN202110954178 A CN 202110954178A CN 113675522 B CN113675522 B CN 113675522B
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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
-
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention relates to a lithium battery suitable for use in an underwater device, comprising: a bottom case and an upper case connected to a top of the bottom case; more than one battery compartment for placing the battery cell module is arranged in the bottom shell; a wiring cabin is arranged in the bottom shell; a module waterproof cover is arranged on the battery compartment; the module waterproof cover covers the battery cell module in the battery compartment, and a bottom shell fixing screw post matched with the module fixing screw post 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; according to the battery cell module, the battery is independently waterproof and sealed in the battery, the BMS protection board is independently sealed and waterproof by glue pouring, and the bottom shell and the upper shell are sealed and waterproof again; and the complete machine inside the current is not required to be filled with glue, so that a good waterproof effect can be realized, the overall 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 underwater equipment.
Background
Along with the development of new energy equipment such as electric vehicles, logistics robots and electric ships, the use of lithium batteries is more and more extensive, most of lithium batteries in the existing market are used for products of road surface traveling, the technology is mature, but the battery products used in water equipment have higher requirements on vibration resistance, shock resistance and water resistance.
The conventional consumer electronic products are basically used in living environments, and the performance indexes such as water resistance, vibration resistance and the like are relatively low, but the water immersion pressure of the products used in water is higher than the atmospheric pressure, so that the risk of water inflow is higher; in addition, the wave in the water surface has different sizes, and the impact, vibration intensity and destructive power on the product are higher than those of daily life; in addition, impurities in the water have greater corrosion damage capability to the shell and some metal devices. Therefore, most consumer battery products cannot meet the use requirements of the underwater equipment.
Disclosure of Invention
1. 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 is reliable in structure and good in waterproof sealing performance.
2. Technical proposal
In order to achieve the above purpose, the main technical scheme adopted by the invention comprises the following steps:
a lithium battery suitable for use with an in-water device, comprising: a bottom case and an upper case connected to a top of the bottom case; more than one battery compartment for placing the battery cell module is arranged in the bottom shell; a wiring cabin used for being assembled with the cell core module is arranged in the bottom shell; a module waterproof cover is arranged on the battery compartment; the module waterproof cover covers the battery cell module in the battery compartment;
a bottom shell fixing screw post matched with a module fixing screw post on the battery cell module is arranged in the bottom shell, and when the battery cell module is connected in the battery compartment, the module fixing screw post is matched with the bottom shell fixing screw post and locked by a screw;
the side edge of the module waterproof cover is connected with a BMS protection plate through a protection plate support, and the BMS protection plate is positioned in the wiring cabin; and a waterproof and explosion-proof valve is arranged on the bottom shell.
Further, the battery cell module comprises a battery cell upper bracket and a battery cell lower bracket, wherein the battery cell lower bracket is provided with a lower mounting hole matched with the lower part of the square battery cell; an upper mounting hole matched with the upper part of the square battery cell is formed in the upper battery cell support, and the upper mounting hole is matched with the lower mounting hole to form an assembly hole for assembling the square battery cell; the battery cell upper bracket is provided with a first mounting groove for mounting the 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 the battery cell output copper bar, the second mounting groove is communicated with the upper mounting hole, and the battery cell output copper bar positioned in the second mounting groove is electrically connected with the square battery cell.
Further, the first mounting groove and the second mounting groove are respectively provided with a positioning rib, and the cell series copper bar and the cell output copper bar are respectively provided with a positioning groove matched with the corresponding positioning ribs.
Further, the 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 the output terminal is provided with an annular sealing ring groove, a copper bar sealing ring is connected in the annular sealing ring groove, and the copper bar sealing ring is matched with a copper bar sealing groove on the waterproof cover of the module.
Further, an upper bracket locking screw column is connected to the upper battery core bracket through a module fixing screw column, a lower bracket locking screw column matched with the upper bracket locking screw column is connected to the lower battery core bracket, and when the upper battery core bracket is connected with the lower battery core bracket, the upper bracket locking screw column is connected with the lower bracket locking screw column and locked by screws; the module fixing screw column is used for fastening the cell module in the bottom shell; a flexible damping pad with back glue is arranged in the lower mounting hole; a third mounting groove for mounting the temperature switch is formed in the upper battery cell bracket; the electric core series copper bar forms a cross section in a shape like a Chinese character 'ji' through stamping.
Further, an output connector connected with the BMS protection plate 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 an inner hole of the connector sealing ring, the upper end face of the lower connecting column forms a limiting platform, and the middle part of the upper end face of the limiting platform extends upwards to form a connector upper screw; the lower connecting column is connected with a first outer connector connected with an external wire harness, the first outer connector comprises a connector lower screw connected with the lower connecting column, the lower end part of the connector lower screw is provided with a lower connecting part, and the lower connecting part is provided with a lower connecting inner hole.
Further, a second outer connector is further connected to the first outer connector, the second outer connector comprises an upper connecting portion connected to the lower connecting inner hole, and the lower end of the upper connecting portion extends downwards to form an outer connecting portion; 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; the bottom of the inner bottom of the lower connecting inner hole and the bottom of the outer connecting part are respectively provided with a mounting groove; 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; the first external connector connected with the external wiring harness is connected in the internal threaded hole; a glue spraying groove is formed on the limiting platform, and the glue spraying groove is matched with the glue spraying platform on the bottom shell assembly column to form a sealing ring groove for spraying glue; the cross section of the lower connecting column is a polygonal or elliptic 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 columns are formed on two sides of the connector sealing ring; 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 assembly column; the bottom of the limiting platform is provided with a first annular convex rib.
Further, a fuse assembly connected with the 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 cabin cover covers the fuse in the fuse cabin; the bottom shell is internally connected with an electrode column assembly, the upper part of the electrode column assembly is positioned at the inner side of the bottom shell, and the lower part of the electrode column assembly is connected with a fuse.
Further, the electrode column assembly includes an electrode column coupled 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 respectively extend to form an upper limiting block and a lower limiting block, and the upper limiting block and the lower limiting block respectively extend outwards to form a fuse upper screw rod and a fuse lower screw rod; the fixed block is provided with a first limiting surface which is limited with the mounting hole; the upper limiting block and the lower limiting block are respectively provided with a second limiting surface which is limited with the bottom shell; glue spraying tables matched with the bottom shell are respectively formed on the upper limiting block and the lower limiting block, and the glue spraying tables are matched with the bottom shell to form a glue groove; the lower screw rod of the fuse of the electrode column assembly is connected with the fuse sequentially from inside to outside through a copper flat gasket, a spring gasket and a copper nut; the upper plane of the glue groove is lower than the upper plane of the glue spraying table; and a safety cabin sealing ring is arranged at the joint of the safety cabin cover and the safety cabin.
Further, 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 glue groove, and when the module waterproof cover is connected to the battery compartment, a sealing groove convex rib at the bottom of the module waterproof cover is matched with the module sealing glue groove to form a seal; the waterproof cover of the module is provided with a screw hole for installation; the waterproof cover of the module is provided with an NTC sealant groove for installing an NTC temperature sensor, and the waterproof cover of the module is provided with a tap sealant groove for installing a tap on the battery cell module; a temperature switch sealant groove for installing a temperature switch is formed in the module waterproof cover; the waterproof cover of the module is provided with a copper bar sealing groove for installing a battery cell output copper bar on the battery cell module; the waterproof cover of the module is provided with a waterproof ventilation groove, and the waterproof ventilation groove is provided with a waterproof ventilation film; be equipped with the assembly screw that is used for the assembly on the protection shield support, be equipped with the supporting rib and the protection shield buckle that are used for the location to support BMS protection shield on the protection shield support, be equipped with the location support column that is used for BMS protection shield to fix a position on the protection shield support, be equipped with on the BMS protection shield with location support column matched with protection shield locating hole.
3. Advantageous effects
The beneficial effects of the invention are as follows: 1. the structure is simple and reliable, and the waterproof sealing performance is good.
2. The battery core module is independently waterproof sealed in the battery, the BMS protection board is independently sealed and waterproof by glue pouring, and the bottom shell and the upper shell are sealed and waterproof again; and the whole machine inside the battery is not required to be filled with glue, so that a good waterproof effect can be realized, the whole weight of the battery is lightened, and the battery is very suitable for underwater equipment.
3. The output electrode has strong universality, can realize heavy current load work, can replace a damaged electrode under the condition of not damaging the waterproof structure of the battery, and reduces maintenance difficulty and cost.
4. The fuse cabin with the waterproof structure is designed, so that damaged fuses can be replaced under the condition that the waterproof structure of the battery is not damaged, maintenance difficulty and cost are reduced, and the safety of the battery is improved.
5. The waterproof and breathable film is adopted inside the battery cell module, the battery shell is provided with the waterproof and explosion-proof valve, and the waterproof and explosion-proof valve and the battery shell are matched with each other, so that air pressure balance and air exchange between the inside of the module and the inside and outside of the battery are realized on the premise that the overall waterproof performance of the module and the battery is ensured.
6. The handle strip is simple in structure and easy to assemble and disassemble, the handle tension is directly stressed on the bottom shell rather than the upper shell, and the upper shell is effectively prevented from being deformed and waterproof to fail due to lifting.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of a bottom structure of an embodiment of the present invention;
FIG. 3 is a schematic view of a waterproof cover of a module according to an embodiment of the present invention;
fig. 4 is a schematic view showing a structure of a protective plate holder according to an embodiment of the present invention;
fig. 5 is a schematic view of a cell module according to an embodiment of the present invention;
figure 6 is an exploded view of the cell module structure of one embodiment of the present invention;
FIG. 7 is a schematic diagram of a copper bar structure of a battery cell output according to an embodiment of the present invention;
FIG. 8 is a cross-sectional view of a copper bar structure of a cell output according to an embodiment of the present invention;
FIG. 9 is a schematic view of a junction box structure according to an embodiment of the present invention;
FIG. 10 is a cross-sectional view of an output connector structure according to one embodiment of the present invention;
FIG. 11 is a front view of an inner connector structure according to one embodiment of the present invention;
FIG. 12 is a bottom view of an inner connector structure according to one embodiment of the present invention;
FIG. 13 is a front view of a second external connector structure according to one embodiment of the present invention;
FIG. 14 is a bottom view of a second outer connector structure according to one embodiment of the present invention;
FIG. 15 is an assembly view of a fuse assembly structure in accordance with one embodiment of the present invention;
FIG. 16 is a bottom view of a fuse assembly structure according to one embodiment of the present invention;
FIG. 17 is a cross-sectional view of a fuse assembly structure in accordance with one embodiment of the present invention;
fig. 18 is a schematic view of an electrode column according to an embodiment of the present invention.
Detailed Description
The invention will be better explained for understanding by referring to the following detailed description of the embodiments in conjunction with the accompanying drawings.
A lithium battery suitable for use in an in-water device according to one embodiment of the present invention, as shown in fig. 1 to 18, includes: a bottom case 1 and an upper case 101, the upper case 101 being connected to the top of the bottom case 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 compartment 4 for placing the battery cell module 3 is arranged in the bottom shell 1; a wiring cabin 5 for wiring with the cell module 3 is arranged in the bottom shell 1; the inner wall of the bottom shell 1 is provided with a module sealant groove 12, and the battery compartment 4 is provided with a module waterproof cover 2; the battery cell module 3 is covered in the battery compartment 4 by the module waterproof cover 2, and when the module waterproof cover 2 is connected to the battery compartment 4, the sealing groove convex ribs 27 at the bottom of the module waterproof cover 2 are matched with the module sealant groove 12 to form a seal; the bottom shell 1 is connected with a handle belt 102 for being lifted conveniently; an infrared communication window 105 is arranged on the bottom shell 1, and a waterproof explosion-proof valve 106 is arranged on the bottom shell 1; the waterproof cover 2 of the module is provided with an air tightness detection port, so that the air tightness of the battery module can be detected first.
As shown in fig. 3 and 4, a bottom shell fixing screw post 11 matched with a module fixing screw post 301 on the battery cell module 3 is arranged in the bottom shell 1, and when the battery cell module 3 is connected in the battery compartment 4, the module fixing screw post 301 is matched with the bottom shell fixing screw post 11 and locked by a screw; the module waterproof cover 2 is provided with screw holes 21 for installation; the module waterproof cover 2 is provided with an NTC sealant groove 22 for installing an NTC temperature sensor, and the module waterproof cover 2 is provided with a tap sealant groove 23 for installing a tap on the cell module 3; the module waterproof cover 2 is provided with a temperature switch sealant groove 24 for installing a temperature switch 39; the module waterproof cover 2 is provided with a copper bar sealing groove 25 for installing a battery cell output copper bar 36 on the battery cell module 3; the waterproof and breathable groove 26 is formed in the waterproof module cover 2, and the waterproof and breathable film 6 is arranged on the waterproof and breathable groove 26; the side edge of the module waterproof cover 2 is connected with a BMS protection plate 104 through a protection plate support 103, and the BMS protection plate 104 is positioned in the wiring cabin 5; the assembly screw 1031 for assembly is arranged on the protection board support 103, the support ribs 1032 and the protection board buckles 1034 for positioning and supporting the BMS protection board 104 are arranged on the protection board support 103, the positioning support columns 1033 for positioning the BMS protection board 104 are arranged on the protection board support 103, and the protection board positioning holes 1041 matched with the positioning support columns 1033 are formed in the BMS protection board 104.
As shown in fig. 5, 6, 7 and 8, the cell module 3 includes a cell upper bracket 31 and a cell lower bracket 32, and the cell lower bracket 32 is provided with a lower mounting hole 322 matched with the lower part of the square cell 33; an upper mounting hole 313 matched with the upper part of the square battery cell 33 is formed in the upper battery cell bracket 31, and the upper mounting hole 313 is matched with a lower mounting hole 322 to form an assembly hole for assembling the square battery cell 33; a first mounting groove 314 for mounting the cell series copper bar 35 is formed in the cell upper bracket 31, and the first mounting groove 314 is communicated with an upper mounting hole 313; the upper cell bracket 31 is provided with a second mounting groove 315 for mounting the cell output copper bar 36, and the second mounting groove 315 is communicated with the upper mounting hole 313, so that the cell output copper bar 36 in the second mounting groove 315 is electrically connected with the square cell 33. The first mounting groove 314 and the second mounting groove 315 are respectively provided with a positioning rib 37, and the cell serial copper bar 35 and the cell output copper bar 36 are respectively provided with a positioning groove 38 matched with the corresponding positioning rib 37. The cell output copper bar 36 includes a copper bar plate 361, a welding groove 362 is provided 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 on 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. An upper bracket locking screw post 312 is connected to the upper cell bracket 31 through a module fixing screw post 301, a lower bracket locking screw post 321 matched with the upper bracket locking screw post 312 is connected to the lower cell bracket 32, and when the upper cell bracket 31 is connected with the lower cell bracket 32, the upper bracket locking screw post 312 is connected with the lower bracket locking screw post 321 and locked by a screw; the module set screw post 301 is used to secure the cell module in the bottom case. The lower mounting hole 322 is internally provided with a flexible shock-absorbing pad 34 with back glue. The upper cell bracket 31 is provided with a third mounting groove for mounting the temperature switch 39. The cell series copper bar 35 is formed into a cross section in a shape like a Chinese character 'ji' by punching.
In the embodiment, the square battery cells 33 are connected in series by adopting a battery cell series copper bar 35, and the battery cell series copper bar 35 and the electrode lugs of the square battery cells 33 are welded together by matching with a laser welding process; the copper bars 35 connected in series with the electric core are provided with a cross section in a shape like a Chinese character 'ji' through a stamping forming process, so that the copper bars 35 connected in series with the electric core obtain better anti-seismic performance; in addition, the positioning groove 38 for positioning is also designed on the cell series copper bar 35 and is matched with the positioning rib 37 of the cell upper bracket 31, so that the cell series copper bar 35 and the lug of the square cell 33 are ensured to be positioned and welded accurately and firmly.
The assembled battery core modules can be placed in a battery compartment of the bottom shell, and the battery core modules can be further connected in series and parallel to each other so as to achieve the required battery voltage and capacity. The copper bar welded with the positive electrode and the negative electrode output end of the battery cell module is called a battery cell output copper bar, and compared with the battery cell serial copper bar, an output terminal is added on a welding plane with the battery cell electrode lug, the output terminal and the copper bar plane can be welded into a whole, and an integrally formed output copper bar product can be obtained by adopting a metal die casting or NC processing mode.
As shown in fig. 9, 10, 11, 12, 13 and 14, an output connector connected with the BMS protection plate 104 is connected in the junction box 5, the output connector comprises a connector sealing ring 52 connected in a stepped hole of the 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, the upper end surface of the lower connecting column 531 forms a limiting platform 532, and the middle part of the upper end surface of the limiting platform 532 extends upwards to form a connector upper screw 533; the lower connection post 531 is connected with a first outer connector 54 connected with an external harness, the first outer connector 54 comprises a connector lower screw 541 connected with the lower connection post 531, a lower connection portion 542 is formed at a lower end portion of the connector lower screw 541, and a lower connection inner hole 543 is formed in the lower connection portion 542. The first outer connector 54 is further connected with a second outer connector 55, the second outer connector 55 includes an upper connection portion 551 connected in the lower connection inner hole 543, and a lower end of the upper connection portion 551 extends downward to form an outer connection portion 552. The inner wall of the lower connecting inner hole 543 is provided with a plurality of elastic ribs 544 at intervals for connecting 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 respectively formed with mounting grooves 56. The upper end surfaces of the lower connection portion 542 and the outer connection portion 552 are respectively provided with a second annular bead 5421. An internal threaded hole 5311 is formed at the center of the lower connection post 531; a first external connector 54 connected to an external harness is connected to the inside of the female screw hole 5311. The limiting platform 532 is provided with a glue spraying groove 534, and the glue spraying groove 534 is matched with the glue spraying platform 511 on the bottom shell assembly column 51 to form a sealing ring groove for spraying glue. The cross section of the lower connecting column 531 is a polygonal or elliptic cylindrical rod with a positioning structure; the cross section of the connector sealing ring 52 is in an i shape, and sealing ring limiting surfaces 522 connected with the bottom shell assembly posts 51 are formed on two sides of the connector sealing ring 52. 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. The 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 limiting platform 532 is formed with a first annular bead 5321.
In this embodiment, the bottom shell assembly post 51 matched with the inner connector 53 and the first outer connector 54 has a multi-layer concentric post hole structure, the cross section of the middle through hole is the same as the outer side surface of the connector sealing ring 52, and the two parts are in close fit in size matching; the upper side of the through hole is matched with the inner connector 53, and the lower side of the through hole is matched with the first outer connector 54; is matched with the first outer connector 54 to form a plane and is matched with the bottom edge of the I-shaped connector sealing ring 52; three step surfaces are designed in the direction of matching with the inner connector 53 upwards; 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 stop platform 532 of the inner connector 53; the bottom surface of the third step surface is close to or the same as the bottom edge of the limit platform 532 of the inner connector 53, and the top surface of the third step surface is positioned between the bottom edge and the top edge of the limit platform 532 of the inner connector 53 and cannot be higher than the top edge of the limit platform 532; under such design, a concave table surface for glue filling is formed between the electrode mounting post on the bottom shell and the inner connector 53 for glue filling and sealing, and the top surface of the electrode mounting assembly is lower than the top edge of the limiting platform 532 of the inner connector 53, so that the glue surface after glue filling is not higher than the plane of the top edge of the limiting platform 532 of the inner connector 53, and poor contact caused by middle sealant is avoided when the top surface of the inner connector 53 is locked and connected with the wire harness terminal.
When assembling, firstly, the connector sealing ring 52 is assembled in the step hole of the bottom shell assembly column 51, and the connector sealing ring 52 and the step hole of the bottom shell assembly column 51 are in a close fit state; then, the lower connecting column 531 of the inner connector 53 passes through the inner hole of the sealing ring, the lower connecting column 531 and the inner hole of the sealing ring are also in a close fit state, and the sealing ring has a slight extrusion deformation state in the gap between the bottom shell assembly column 51 and the lower connecting column 531 of the inner connector 53, so that the gap between the two is completely filled.
Then, the lower connector screw 541 of the first outer connector 54 is matched with the inner threaded 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 using a screwdriver, and the lower connecting column 531 of the inner connector 53 is matched with the limiting surface of the bottom shell assembly 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 parts of the inner connector 53, the first outer connector 54 and the connector sealing ring 52, which are matched with each other in the upper-lower plane, are further pressed by the first annular convex rib 5321 and the second annular convex rib 5421 after being locked, so that a better sealing effect is achieved.
Finally, forming a glue pouring concave table on the glue pouring platform 511 on the bottom shell assembly column 51 and the glue pouring groove 534 of the inner connector 53, and pouring sealant into the glue pouring concave table to strengthen, fix and seal the inner connector 53; the potting adhesive is preferably epoxy resin sealant with good sealing effect and high mechanical strength after solidification; the connector upper screw 533 at the upper part of the inner connector 53 is electrically connected to the wire harness inside the battery.
The assembled inner connector 53 and the sealing ring and the bottom shell become a whole, the first outer connector 54 can be easily assembled and disassembled by a screwdriver, the second outer connector 55 serving as a female seat is easy to damage under heavy current load, the elastic ribs 544 are damaged and then can generate heat seriously even if not timely replaced, the risk of igniting the battery shell is damaged under heavy current load, the former connector needs to be disassembled for integral replacement, the operation is complex, the cost is high, and the damaged first outer connector 54 part can be easily and independently replaced by adopting the scheme, so that the repairing effect can be achieved.
The second outer connector 55 of the male connector can be replaced by the first outer connector 54 of the female connector according to actual needs, and the universality of battery monomers of different products can be achieved within a certain range.
Further, in the above-mentioned scheme, the screw and the inner screw hole structure used for the inner connector 53 and the first outer connector 54 may be interchanged according to actual needs, and may not be completely fixed.
As shown in fig. 15, 16, 17 and 18, a fuse assembly connected with the BMS protection plate 104 is connected 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 cabin cover 64 covers the fuse 63 in the fuse cabin 62; an electrode column assembly is connected in the bottom shell 1, the upper part of the electrode column assembly is positioned at 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 connected to the mounting hole 611 of the bottom case 1; the electrode column 69 includes a fixing block 691 connected in the mounting hole 611, and the upper end and the lower end of the fixing block 691 respectively extend to form an upper limit block 692 and a lower limit block 696, and the upper limit block 692 and the lower limit block 696 respectively extend outwards to form a fuse upper screw 693 and a fuse lower screw 694. The fixed block 691 is provided with a first limiting surface 697 limiting with the mounting hole 611. The upper stopper 692 and the lower stopper 696 are respectively provided with a second limiting surface 695 which is limited by the bottom shell 1. The upper stopper 692 and the lower stopper 696 are respectively provided with a glue spraying table 698 matched with the bottom shell 1, and the glue spraying table 698 is matched with the bottom shell 1 to form the glue groove 610. The fuse lower screw 694 of the electrode column assembly is connected with the fuse 63 through the copper flat washer 66, the spring washer 67 and the copper nut 68 in order from the inside to the outside. The upper plane of the glue slot 610 is lower than the upper plane of the glue station 698. The connection between the fuse cabin cover 64 and the fuse cabin 62 is provided with a fuse cabin sealing ring 65.
Further, the upper limit block 692 and the lower limit block 696 are respectively provided with a glue spraying table 698 matched with the bottom shell 1, the glue spraying table 698 is matched with the bottom shell 1 to form a glue groove 610, the upper plane of the glue groove 610 is lower than the upper plane of the glue spraying table 698, and the height of glue filling is not higher than the glue spraying table 698, so that poor electrical connection contact between the electrode column and the wire harness terminal is not caused.
Further, the lower fuse 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 from the inside of the battery to the fuse through the electrode column and then flows back to the inside of the current, the path is shortest, no redundant wire harness flows and turns to the wiring, and the structure is simple and reliable.
In this embodiment, the upper screw 693 and the lower screw 694 of the fuse are replaced by a double screw hole structure or a male and female screw structure according to actual needs, so that the fuse is flexible to use.
In the present embodiment, the electrode column 69 is embedded in the plastic bottom shell 1 by adopting a production process of encapsulation injection molding; the fuse cabin cover is provided with a sealant groove, and after the fuse cabin cover is assembled, the sealant groove is extruded and deformed by adopting a sealing ring, so that a complete sealing environment is formed in the fuse cabin. The inside of the shell and the fuse cabin are isolated and sealed, and even if the fuse cabin cover is filled with water, the waterproof performance inside the battery can not be influenced, so that the battery is dangerous.
In this embodiment, when the fuse breaks down and needs to be changed, only need demolish the fuse hatch cover screw, unscrew the nut and pull down, change the fuse, later only need check the nut whether lock, hatch cover sealing washer is damaged, can adorn the hatch back, need not dismouting battery case, does not destroy the inside waterproof construction of battery, safe and reliable is convenient.
In this embodiment, in order to meet the multiple disassembly and assembly requirements of the hatch cover, the hatch cover screw is preferably a machine tooth screw, and the nut can be embedded into the battery shell by adopting a packaging injection molding process or a hot riveting process, so as to solve the problem that screw hole sliding teeth cannot be reused after disassembly and assembly for several times by using the tapping screw.
In this embodiment, for strengthening the self inside waterproof of fuse cabin, can also carry out the encapsulating to the fuse cabin alone and handle, here encapsulating can select the silicon system filling glue that the leakproofness is good and easy clearance earlier, when guaranteeing sealed waterproof performance, compromise and change maintenance convenience.
The foregoing description is only of the preferred embodiments of the invention, and all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (8)
1. A lithium battery suitable for use in an underwater device, comprising: a bottom case (1) and an upper case (101), the upper case (101) being connected to the top of the bottom case (1); more than one battery compartment (4) for placing the battery cell module (3) is arranged in the bottom shell (1); a wiring cabin (5) used for wiring with the cell module (3) is arranged in the bottom shell (1); a module waterproof cover (2) is arranged on the battery compartment (4); the module waterproof cover (2) covers the battery cell module (3) in the battery compartment (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 in 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 support (103), and the BMS protection plate (104) is positioned in the wiring cabin (5); a waterproof and explosion-proof valve (106) is arranged on the bottom shell (1);
the wiring cabin (5) is connected with a fuse assembly connected with the BMS protection plate (104), 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 cabin cover (64) covers the fuse (63) in the fuse cabin (62); the bottom shell (1) is connected with an electrode column assembly, the upper part of the electrode column assembly is positioned at 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 comprises an electrode column (69) connected to a mounting hole (611) of the bottom case (1); the electrode column (69) comprises a fixed block (691) connected in the mounting hole (611), an upper limit block (692) and a lower limit block (696) are respectively formed by extending the upper end and the lower end of the fixed block (691), and the upper limit block (692) and the lower limit block (696) are respectively formed by extending the upper screw (693) and the lower screw (694) of the fuse wire outwards; a first limiting surface (697) which is limited with the mounting hole (611) is arranged on the fixed block (691); the upper limit block (692) and the lower limit block (696) are respectively provided with a second limit surface (695) which is limited with the bottom shell (1); glue spraying tables (698) matched with the bottom shell (1) are respectively formed on the upper limiting block (692) and the lower limiting block (696), and the glue spraying tables (698) are matched with the bottom shell (1) to form a glue groove (610); the lower fuse screw (694) of the electrode column assembly is connected with the fuse (63) through a copper flat gasket (66), a spring gasket (67) and a copper nut (68) in sequence from inside to outside; the upper plane of the glue groove (610) is lower than the upper plane of the glue spraying table (698); a safety cabin sealing ring (65) is arranged at the joint of the safety cabin cover (64) and the safety cabin (62);
and an output connector connected with the BMS protection plate (104) is connected in the wiring cabin (5).
2. A lithium battery suitable for use in an underwater device as claimed in claim 1, wherein: the battery cell module (3) comprises a battery cell upper bracket (31) and a battery cell lower bracket (32), wherein a lower mounting hole (322) matched with the lower part of the square battery cell (33) is formed in the battery cell lower bracket (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 a lower mounting hole (322) to form an assembly 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 bracket (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 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 electrically connected with the square battery cell (33).
3. A lithium battery suitable for use in an underwater device as claimed in claim 2, wherein: the first mounting groove (314) and the second mounting groove (315) are respectively provided with a positioning rib (37), and the cell series copper bar (35) and the cell output copper bar (36) are respectively provided with a positioning groove (38) matched with the corresponding positioning rib (37).
4. A lithium battery suitable for use in an underwater device as claimed in claim 2, wherein: the 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 on the output terminal (363); the outer wall of the output terminal (363) is provided with an annular sealing ring groove (365), 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) on the waterproof cover (2) of the module.
5. A lithium battery suitable for use in an underwater device as claimed in claim 2, wherein: an upper bracket locking screw column (312) is connected to the upper battery core bracket (31) through a module fixing screw column (301), a lower bracket locking screw column (321) matched with the upper bracket locking screw column (312) is connected to the lower battery core bracket (32), and when the upper battery core bracket (31) is connected with the lower battery core bracket (32), the upper bracket locking screw column (312) is connected with the lower bracket locking screw column (321) and locked by screws; the module fixing screw column (301) is used for fastening the cell module in the bottom shell; a flexible damping liner (34) with back glue is arranged in the lower mounting hole (322); a third mounting groove for mounting a temperature switch (39) is formed in the upper battery cell bracket (31); the battery cell series copper bar (35) is formed into a cross section in a shape like a Chinese character 'ji' through stamping.
6. A lithium battery suitable for use in an underwater device as claimed in claim 1, wherein: 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), the upper end face of the lower connecting column (531) forms a limiting platform (532), and the middle part of the upper end face of the limiting platform (532) extends upwards to form a connector upper screw (533); the lower connecting column (531) is connected with a first outer connector (54) connected with an external wiring harness, the first outer connector (54) comprises a connector lower screw rod (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 rod (541), and a lower connecting inner hole (543) is formed in the lower connecting portion (542).
7. A lithium battery suitable for use in an aquatic device as defined in 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 in 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); the bottom of the inner bottom of the lower connecting inner hole (543) and the bottom of the outer connecting part (552) are respectively provided with a mounting groove (56); 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 thread hole (5311) is formed at the center of the lower connecting column (531); a first external connector (54) connected to the external harness is connected to the internal screw hole (5311); a glue spraying groove (534) is formed on the limiting platform (532), and the glue spraying groove (534) is matched with the glue spraying platform (511) on the bottom shell assembly column (51) to form a sealing ring groove for spraying glue; the cross section of the lower connecting column (531) is a polygonal or elliptic 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 columns (51) are formed on two sides of the connector sealing ring (52); 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 limit platform (532) is provided with a first annular convex rib (5321).
8. A lithium battery suitable for use in an underwater device as claimed in 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 glue groove (12), and when the module waterproof cover (2) is connected to the battery compartment (4), a sealing groove convex rib (27) at the bottom of the module waterproof cover (2) is matched with the module sealing glue groove (12) to form sealing; the module waterproof cover (2) is provided with a screw hole (21) for installation; an NTC sealant groove (22) for installing an NTC temperature sensor is formed in the module waterproof cover (2), and a tap sealant groove (23) for installing a tap on the cell module (3) is formed in the module waterproof cover (2); a temperature switch sealant groove (24) for installing a temperature switch (39) is formed in the module waterproof cover (2); a copper bar sealing groove (25) for installing a battery cell output copper bar (36) on the battery cell module (3) is formed in the module waterproof cover (2); a waterproof and breathable groove (26) is formed in the module waterproof cover (2), and a waterproof and breathable film (6) is arranged on the waterproof and breathable groove (26); be equipped with on the protection shield support (103) and be used for assembled assembly screw (1031), be equipped with on the protection shield support (103) and be used for location support BMS protection shield (104) support muscle (1032) and protection shield buckle (1034), be equipped with on the protection shield support (103) and be used for location support column (1033) of BMS protection shield (104) location, be equipped with on the BMS protection shield (104) with location support column (1033) matched with protection shield locating hole (1041).
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