CN109103368B - Square battery module and grouping method thereof - Google Patents

Square battery module and grouping method thereof Download PDF

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Publication number
CN109103368B
CN109103368B CN201710476117.0A CN201710476117A CN109103368B CN 109103368 B CN109103368 B CN 109103368B CN 201710476117 A CN201710476117 A CN 201710476117A CN 109103368 B CN109103368 B CN 109103368B
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China
Prior art keywords
plate
connection sheet
battery module
conductive
square battery
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CN201710476117.0A
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Chinese (zh)
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CN109103368A (en
Inventor
张建平
徐永军
翁志福
兰志波
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Aulton New Energy Automotive Technology Co Ltd
Shanghai Dianba New Energy Technology Co Ltd
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Aulton New Energy Automotive Technology Co Ltd
Shanghai Dianba New Energy Technology Co Ltd
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Application filed by Aulton New Energy Automotive Technology Co Ltd, Shanghai Dianba New Energy Technology Co Ltd filed Critical Aulton New Energy Automotive Technology Co Ltd
Priority to CN202210281757.7A priority Critical patent/CN114614205A/en
Priority to CN201710476117.0A priority patent/CN109103368B/en
Publication of CN109103368A publication Critical patent/CN109103368A/en
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Publication of CN109103368B publication Critical patent/CN109103368B/en
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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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
    • 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
    • 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
    • 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
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • 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
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • H01M50/51—Connection only in series
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • H01M50/512—Connection only in parallel
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/519—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising printed circuit boards [PCB]
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The invention discloses a square battery module and a grouping method thereof. The square battery module comprises an electric connection sheet assembly and a battery pack, wherein the electric connection sheet assembly is arranged above the battery pack, the battery pack comprises a plurality of square battery monomers, and the electric connection between the electric connection sheet assembly and the single pole of the square battery is realized through bonding and is used for series connection or parallel connection between the square battery monomers. The grouping method of the square battery modules comprises the following steps: and bonding the electric connecting sheet assembly with the poles of the square battery cells. The electric connection sheet in the square battery module is electrically connected with the single pole of the square battery through bonding, and the electric connection reliability is high.

Description

Square battery module and grouping method thereof
Technical Field
The invention relates to a square battery module and a grouping method thereof.
Background
When current square battery of automobile-used power is in groups, mainly through screw locking fastening between battery utmost point post and the electricity connection piece. However, the screw connection is easy to loose under the vibration working condition of long-term use of the automobile, so that the electric connection is easy to fail.
Therefore, the square battery module in the prior art has the defect that the electrical connection is easy to fail.
Disclosure of Invention
The invention provides a square battery module and a grouping method thereof, aiming at overcoming the defect that the square battery module in the prior art is easy to lose effectiveness due to electric connection.
The invention solves the technical problems through the following technical scheme:
the utility model provides a square battery module, includes electric connection piece subassembly and group battery, the electric connection piece subassembly is located the top of group battery, the group battery includes a plurality of square battery monomer, its characterized in that, the electric connection piece subassembly with realize the electricity through the bonding between the free utmost point post of square battery and connect, be used for a plurality of establish ties or parallelly connected between the square battery monomer.
Preferably, the electric connection piece assembly and the pole of the square battery cell are electrically connected through bonding the first conductive assembly.
In the technical scheme, on one hand, the first conductive assembly can reliably realize the electrical connection between the electrical connection sheet assembly and the pole of the square battery cell; on the other hand, when the current is large, the first conductive assembly can protect the square battery cell through fusing.
Preferably, the square battery module further comprises a signal acquisition board, the signal acquisition board is arranged above the battery pack, and the signal acquisition board and the electric connection sheet assembly are bonded to realize voltage and temperature acquisition of the square battery monomer.
Preferably, the signal acquisition board and the electric connection sheet assembly are bonded with each other through a second conductive assembly to realize voltage and temperature acquisition of the square battery cells.
Preferably, the electric connection sheet assembly and the single square battery pole are electrically connected through ultrasonic bonding or laser bonding of the first conductive assembly, and/or the signal acquisition board and the electric connection sheet assembly are electrically connected through ultrasonic bonding or laser bonding of the second conductive assembly, so that voltage and temperature acquisition of the single square battery is realized.
In the technical scheme, the ultrasonic bonding is more suitable for the conductive assembly with smaller overcurrent capacity, and the laser bonding is more suitable for the conductive assembly with larger overcurrent capacity.
Preferably, the electrical connection sheet assembly comprises a first electrical connection sheet and a second electrical connection sheet which are oppositely arranged, and the signal acquisition board is positioned between the first electrical connection sheet and the second electrical connection sheet;
the first conductive assembly comprises a plurality of groups of first conductive elements, the second conductive assembly comprises a plurality of groups of second conductive elements, one side of the first electric connection sheet is connected with a plurality of groups of first conductive elements, the plurality of groups of first conductive elements on the first electric connection sheet are arranged in one-to-one correspondence with positive posts or negative posts of the square battery monomers, and the other side of the first electric connection sheet is connected with a plurality of groups of second conductive elements;
one side of the second electric connecting sheet is connected with a plurality of groups of first conductive elements, the plurality of groups of first conductive elements on the second electric connecting sheet are arranged in one-to-one correspondence with the negative poles or the positive poles of the square battery monomers, and the other side of the second electric connecting sheet is connected with a plurality of groups of second conductive elements;
wherein each set of the first conductive elements on the first and second electrical connection sheets comprises at least one first conductive element, and each set of the second conductive elements on the first and second electrical connection sheets comprises at least one second conductive element.
Preferably, one end of each first conductive element corresponding to the first electrical connection sheet is connected to the first electrical connection sheet, and the other end of each first conductive element is connected to the positive pole or the negative pole of the corresponding square battery cell;
one end of each first conductive element corresponding to the second electric connection sheet is connected to the second electric connection sheet, and the other end of each first conductive element is connected to the corresponding negative pole or positive pole of the square battery monomer.
In this technical scheme, the other end of first conductive element directly with the free positive post of square battery and negative pole post carry out the electricity and connect, and the structure is comparatively simple, the grouping of the square battery module of being convenient for.
Preferably, one end of each first conductive element corresponding to the first electrical connection sheet is connected to the first electrical connection sheet, and the other end of each first conductive element is connected to a first adapter element, and the first adapter element is pressed on the top of the square battery cell and is electrically connected to the positive pole or the negative pole of the corresponding square battery cell;
one end of each first conductive element corresponding to the second electric connection sheet is connected to the second electric connection sheet, the other end of each first conductive element is connected to a second switching element, and the second switching element is arranged on the top of the square battery monomer in a pressing mode and is electrically connected to the corresponding negative pole column or positive pole column of the square battery monomer.
In the technical scheme, the other end of the first conductive element is electrically connected with the positive pole and the negative pole of the square battery cell correspondingly through the first switching element and the second switching element respectively, so that on one hand, the square battery cell can be better protected, and the reliability of electrical connection is further improved; on the other hand does benefit to the single echelon utilization of battery, and battery module disassembles the back promptly, can guarantee the single intact of battery to realize the single echelon utilization of battery.
Preferably, the first rotating element is provided with a first pole column accommodating hole, the first pole column accommodating hole penetrates through the first rotating element along the thickness direction of the first rotating element, and the first rotating element is sleeved on the positive pole column or the negative pole column through the first pole column accommodating hole;
the second adapter element is provided with a second pole column accommodating hole, the second pole column accommodating hole penetrates through the second adapter element along the thickness direction of the second adapter element, and the second adapter element is sleeved on the positive pole column or the negative pole column through the second pole column accommodating hole.
In the technical scheme, the number of the first switching elements and the second switching elements is matched with that of the square battery cells. According to the actual series-parallel connection requirement of the square battery module, one part of the first switching elements is sleeved on the corresponding positive pole column of one part of the square battery monomers through the first pole column accommodating hole, the other part of the first switching elements is sleeved on the corresponding negative pole column of the other part of the square battery monomers through the first pole column accommodating hole, correspondingly, one part of the second switching elements is sleeved on the corresponding negative pole column of one part of the square battery monomers through the second pole column accommodating hole, and the other part of the second switching elements is sleeved on the corresponding positive pole column of the other part of the square battery monomers through the second pole column accommodating hole.
Preferably, the first conductive element is a copper bar or an aluminum bar, and the second conductive element is a copper bar, an aluminum bar, a copper wire or an aluminum wire.
The first conductive element is used for electrical connection and the second conductive element is used for electrical signal detection, so the cross-section of the first conductive element is generally larger than the cross-section of the second conductive element. In the technical scheme, the cross sections of the copper bars and the aluminum bars are large in size, and the over-current capacity is large; the cross-sectional sizes of the copper wires and the aluminum wires are small, and the overcurrent capacity is small.
Preferably, the cross sections of the copper bar and the aluminum bar are both square or cylindrical.
Preferably, the square battery module further includes a mounting bracket pressed on the battery pack, and the mounting bracket includes:
the support body is provided with a plurality of first accommodating grooves and a plurality of second accommodating grooves, the first accommodating grooves and the first switching elements are arranged in a one-to-one correspondence mode, the second accommodating grooves and the second switching elements are arranged in a one-to-one correspondence mode, each first accommodating groove and each second accommodating groove penetrate through the support body along the thickness direction of the support body, and at least part of each first switching element penetrates through the corresponding first accommodating groove and at least part of each second switching element penetrates through the corresponding second accommodating groove.
Preferably, the mounting bracket further comprises:
the first support plate is erected on the support body along the length direction of the support body, and the first electric connecting sheet is pressed on the first support plate;
the second backup pad is followed the length direction of support body erects in the support body, the second electricity connection piece is pressed and is located the second backup pad, just first backup pad with the second backup pad sets up relatively.
In this technical scheme, first backup pad and second backup pad can enough support first electric connection piece and second electric connection piece, can protect first electric connection piece and second electric connection piece again. Meanwhile, the first electric connection sheet and the second electric connection sheet are arranged above the square battery monomer, so that the space of the square battery monomer is not occupied, and the space utilization rate is improved.
Preferably, a plurality of first positioning columns are arranged on the first supporting plate, and a plurality of first positioning holes matched with the plurality of first positioning columns are arranged on the first electric connecting sheet;
the second support plate is provided with a plurality of second positioning columns, and the second electric connecting sheet is provided with a plurality of second positioning holes matched with the second positioning columns.
Preferably, the first electrical connection sheet is connected to the first support plate by ultrasonic fusion welding, thermal fusion welding or a fastener, and the second electrical connection sheet is connected to the second support plate by ultrasonic fusion welding, thermal fusion welding or a fastener.
Preferably, the first support plate has a head end and a tail end, the head end of the first support plate has a first end positioning plate for limiting the movement of the first electrical connection sheet relative to the first support plate along the length direction of the first support plate;
the second support plate has a head end and a tail end, and the tail end of the second support plate has a second end positioning plate for limiting the movement of the second electrical connection sheet relative to the second support plate along the length direction of the second support plate.
Preferably, a first side positioning plate is arranged on one side of the first supporting plate, which is far away from the positive pole of the square battery cell, and the first side positioning plate is used for limiting the movement of the first electric connecting sheet relative to the first supporting plate along the width direction of the first supporting plate;
a second side edge positioning plate is arranged on one side, away from the negative pole of the square battery monomer, of the second supporting plate and used for limiting the second electric connecting sheet to move relative to the second supporting plate along the width direction of the second supporting plate;
the bracket body, the first side positioning plate and the second side positioning plate are enclosed to form an accommodating area, and the signal acquisition plate is located in the accommodating area.
Preferably, a plurality of first grooves are formed in the first side positioning plate, and the first grooves are used for accommodating the second conductive elements connected to the first electrical connection sheet;
and the second side edge positioning plate is provided with a plurality of second grooves, and the second grooves are used for accommodating the second conductive elements connected to the second electric connection sheet.
Preferably, the first side positioning plate extends from the head end of the first supporting plate to the tail end of the first supporting plate, and the first side positioning plate and the first end positioning plate are of an integral structure;
the second side positioning plate extends to the tail end of the second supporting plate from the head end of the second supporting plate, and the second side positioning plate and the second end positioning plate are of an integral structure.
Preferably, a first connecting plate is arranged at one end of the first electric connecting sheet, which is far away from the first end positioning plate;
a second connecting plate is arranged at one end, far away from the second end positioning plate, of the second electric connecting sheet;
the first connecting plate and the second connecting plate are used for externally connecting the square battery module.
Preferably, the first connecting plate and the second connecting plate are both provided with threaded holes, and the square battery module is externally connected through fasteners matched with the threaded holes.
Preferably, the first connecting plate and the second connecting plate are both provided with terminal communication holes, and plug-in terminals are inserted into the terminal communication holes.
Preferably, the bracket body is provided with two groups of side positioning columns and a group of middle positioning columns, and the middle positioning columns are positioned between the two groups of side positioning columns;
the signal acquisition board is provided with two groups of side positioning holes and a group of middle positioning holes, the two groups of side positioning holes are matched with the two groups of side positioning columns, and the middle positioning holes are matched with the middle positioning columns.
Preferably, the signal collecting plate is connected to the bracket body by ultrasonic welding, thermal welding or a fastener.
Preferably, two connectors are arranged at two ends of the signal acquisition board, and the two connectors are used for being electrically connected with an external electrical element to output acquired voltage to the outside.
Preferably, the height direction of each square battery cell is parallel to the height direction of the square battery module, the square battery module further comprises a housing, the housing comprises a head cover, a left side cover, a tail cover, a right side cover, a top cover and a bottom plate, the head cover, the left side cover, the tail cover and the right side cover are sequentially connected end to end, the top cover and the bottom plate are oppositely arranged, the bottom plate is adjacent to the head cover, the left side cover, the tail cover and the right side cover, an accommodating cavity is defined by the head cover, the left side cover, the tail cover, the right side cover and the bottom plate, and the battery pack is arranged in the accommodating cavity;
the two sides of the bracket body are respectively provided with a vertical connecting plate, the top cover is buckled with the vertical connecting plates, and the top cover and the bracket body enclose a closed space;
the top of the head end cover and the top of the tail end cover are respectively provided with a boss, the first connecting plate is arranged on the boss of the head end cover in a pressing mode, and the second connecting plate is arranged on the boss of the tail end cover in a pressing mode.
Preferably, an insulating plate is respectively arranged between the battery pack and the head end cover, between the battery pack and the left side cover, between the battery pack and the tail end cover, and between the battery pack and the insulating plate, the battery pack is connected in an adhesive manner.
Preferably, the vertical connecting plate, the bracket body, the first supporting plate and the second supporting plate are of an integral structure.
Preferably, the signal acquisition board is an integrally formed epoxy resin hard board or a flexible board formed by a polyacetamide film.
Preferably, an insulating plate is clamped between any two adjacent square battery cells.
In the technical scheme, the insulating plates between the square battery monomers mainly play a role in protecting the square battery monomers, so that the bulge phenomenon of the square battery monomers is reduced.
The invention also provides a grouping method of the square battery modules, which is characterized by comprising the following steps:
S10and bonding the electric connection sheet assembly with the plurality of single pole columns of the square battery.
Preferably, the square battery module further comprises a signal acquisition board, the signal acquisition board is arranged above the battery pack, the electric connection piece assembly and the single pole of the square battery are electrically connected through a bonded first conductive assembly, and the signal acquisition board and the electric connection piece assembly realize voltage and temperature acquisition of the single square battery through a bonded second conductive assembly; the electric connecting sheet assembly comprises a first electric connecting sheet and a second electric connecting sheet which are oppositely arranged, the signal acquisition board is positioned between the first electric connecting sheet and the second electric connecting sheet, the first electric conducting assembly comprises a plurality of groups of first electric conducting elements, and the second electric conducting assembly comprises a plurality of groups of second electric conducting elements; each set of the first conductive elements comprises at least one first conductive element and each set of the second conductive elements comprises at least one second conductive element;
step S10The method comprises the following steps:
S101: bonding one end of each first conductive element in each group of first conductive elements corresponding to the first electric connection sheet with one side of the first electric connection sheet;
S102: bonding the other end of each first conductive element in each group of first conductive elements corresponding to the first electric connecting sheet with a first switching element;
S103: the first adapter element is pressed on and electrically connected to the positive pole of the corresponding square battery monomer;
S104: bonding one end of each second conductive element in each group of second conductive elements corresponding to the first electric connection sheet with the other side of the first electric connection sheet;
S105: bonding the other end of each second conductive element in each group of second conductive elements corresponding to the first electric connecting sheet with one side of the signal acquisition board;
S106: bonding one end of each first conductive element in each group of first conductive elements corresponding to the second electric connection sheet with one side of the second electric connection sheet;
S107: bonding the other end of each first conductive element in each group of first conductive elements corresponding to the second electric connecting sheet with the second adapter element;
S108: the second switching element is pressed on and electrically connected to the negative pole column of the corresponding square battery monomer;
S109: bonding one end of each second conductive element in each group of second conductive elements corresponding to the second electric connection sheet with the other side of the second electric connection sheet;
S110: and bonding the other end of each second conductive element in each group of second conductive elements corresponding to the second electric connecting sheets with the other side of the signal acquisition board.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows:
the electric connection sheet in the square battery module realizes the electric connection with the single pole of the square battery through bonding, the electric connection is reliable, and the phenomenon that the electric connection is easy to lose efficacy in the prior art is effectively improved.
Drawings
Fig. 1 is an exploded schematic view of a square battery module according to embodiment 1 of the present invention.
Fig. 2 is a schematic structural view of a square battery module according to embodiment 1 of the present invention without a top cover.
Fig. 3 is a schematic structural view of a prismatic battery module according to embodiment 1 of the present invention, with a case removed.
Fig. 4 is a schematic front view of a mounting bracket in a square battery module according to embodiment 1 of the present invention.
Fig. 5 is a schematic reverse structure view of a mounting bracket in a prismatic battery module according to embodiment 1 of the present invention.
Fig. 6 is a schematic diagram showing the relative positions of the first electrical connection tab and the second connection tab in the square battery module according to embodiment 1 of the invention.
Fig. 7 is a schematic structural view of a signal acquisition board in the square battery module according to embodiment 1 of the present invention.
Fig. 8 is a schematic view of a connection structure of a first electrical connection sheet, a second electrical connection sheet and a mounting bracket in a square battery module according to embodiment 1 of the invention.
Fig. 9 is a schematic view of a connection structure of a first electrical connection sheet, a second electrical connection sheet, a signal acquisition board and a mounting bracket in a square battery module according to embodiment 1 of the present invention.
Fig. 10 is an exploded view of a square battery module according to embodiment 2 of the present invention.
Fig. 11 is a schematic structural view of a square battery module according to embodiment 2 of the present invention, with the top cover removed.
Description of reference numerals:
10: electrical connector tab assembly
101: first electric connection sheet
1011: a first positioning hole
1012: first connecting plate
102: second electric connecting sheet
1021: second positioning hole
1022: second connecting plate
20: battery pack
201: square battery monomer
30: signal acquisition board
301: side locating hole
302: middle positioning hole
303: connector assembly
40: shell body
401: head end cover
4011: boss
402: left side cover
403: tail end cover
4031: boss
404: right side cover
405: top cover
406: base plate
407: insulating board
50: first conductive component
501: first conductive element
60: second conductive assembly
601: second conductive element
70: first switching element
80: second switching element
90: mounting bracket
901: support body
9011: a first accommodation groove
9012: second accommodation groove
9013: side positioning column
9014: middle positioning column
9015: vertical connecting plate
902: first supporting plate
9021: first positioning column
9022: first end positioning plate
9023: first side edge positioning plate
9024: the first groove
903: second support plate
9031: second positioning column
9032: second end positioning plate
9033: second side edge positioning plate
9034: second groove
100: plug-in terminal
Detailed Description
The present invention will be more clearly and completely described in the following description of preferred embodiments, taken in conjunction with the accompanying drawings.
Example 1
As shown in fig. 1 to 3, the square battery module includes an electrical connection sheet assembly 10, a battery pack 20, a signal acquisition board 30 and a housing 40, the electrical connection sheet assembly 10 and the signal acquisition board 30 are disposed above the battery pack 20, the battery pack includes a plurality of square battery cells 201, and a height direction of each square battery cell 201 is parallel to a height direction of the square battery module. The housing 40 includes a head end cover 401, a left side cover 402, a tail end cover 403, a right side cover 404, a top cover 405 and a bottom plate 406, the head end cover 401, the left side cover 402, the tail end cover 403 and the right side cover 404 are sequentially connected end to end, the top cover 405 and the bottom plate 406 are oppositely disposed, the bottom plate 406 is adjacent to the head end cover 401, the left side cover 402, the tail end cover 403 and the right side cover 404, the head end cover 401, the left side cover 402, the tail end cover 403, the right side cover 404 and the bottom plate 406 enclose an accommodating cavity, and the battery pack 20 is disposed in the accommodating cavity. The electric connection sheet assembly 10 is electrically connected with the poles of the square battery cells 201 through bonding, and is used for series connection or parallel connection of the square battery cells 201. The signal acquisition board 30 and the electric connection sheet assembly 10 are bonded to realize voltage and temperature acquisition of the square battery cells 201.
In the present embodiment, as shown in fig. 1 to 3, the electrical connection between the electrical connection tab assembly 10 and the terminal of the prismatic battery cell 201 is achieved by bonding the first conductive assembly 50. The voltage and temperature acquisition of the square battery cell 201 is realized between the signal acquisition board 30 and the electric connection sheet assembly 10 through bonding the second conductive assembly 60.
On one hand, the first conductive assembly can reliably realize the electrical connection between the electrical connection sheet assembly and the pole of the square battery monomer; on the other hand, when the current is large, the first conductive assembly can protect the square battery cell through fusing.
In this embodiment, the electrical connection sheet assembly and the single pole of the square battery are electrically connected through the first conductive assembly in ultrasonic bonding, and the signal acquisition board and the electrical connection sheet assembly are electrically connected through the second conductive assembly in ultrasonic bonding to acquire the voltage and temperature of the single square battery. In other alternative embodiments, the connection sheet assembly and the single square battery post may be electrically connected by laser bonding of the first conductive assembly, and the signal acquisition board and the electrical connection sheet assembly may be electrically connected by laser bonding of the second conductive assembly to acquire the voltage and temperature of the single square battery.
In this embodiment, as shown in fig. 1 to 3, the electrical connection sheet assembly 10 includes a first electrical connection sheet 101 and a second electrical connection sheet 102 which are oppositely disposed, and the signal acquisition board 30 is located between the first electrical connection sheet 101 and the second electrical connection sheet 102. The first conductive assembly 50 comprises a plurality of groups of first conductive elements 501, the second conductive assembly 60 comprises a plurality of groups of second conductive elements 601, one side of the first electric connection sheet 101 is connected with the plurality of groups of first conductive elements 501, the plurality of groups of first conductive elements 501 on the first electric connection sheet 101 are arranged in one-to-one correspondence with the positive posts or the negative posts of the plurality of square battery monomers 201, and the other side of the first electric connection sheet 101 is connected with the plurality of groups of second conductive elements 601; one side of the second electric connection sheet 102 is connected with a plurality of groups of first conductive elements 501, the plurality of groups of first conductive elements 501 on the second electric connection sheet 102 are arranged in one-to-one correspondence with the negative poles or the positive poles of the plurality of square battery cells 201, and the other side of the second electric connection sheet 102 is connected with a plurality of groups of second conductive elements 601; each group of first conductive elements 501 on the first electrical connection sheet 101 and the second electrical connection sheet 102 comprises two first conductive elements 501, and each group of second conductive elements 601 on the first electrical connection sheet 101 and the second electrical connection sheet 102 comprises two second conductive elements 601.
In other alternative embodiments, the number of the first conductive elements in each group of the first conductive elements may also be one, three or more, and the number of the first conductive elements in each group of the second conductive elements may also be one, three or more.
In the present embodiment, as shown in fig. 1 to 3, one end of each first conductive element 501 corresponding to the first electrical connection sheet 101 is connected to the first electrical connection sheet 101, and the other end is connected to the corresponding first junction element 70, and the first junction element 70 is pressed on the top of the prismatic battery cell 201 and is electrically connected to the positive pole or the negative pole of the corresponding prismatic battery cell 201; one end of each first conductive element 501 corresponding to the second electrical connection sheet 102 is connected to the second electrical connection sheet 102, and the other end is connected to the corresponding second adapter element 80, and the second adapter element 80 is pressed on the top of the square battery cell 201 and is electrically connected to the negative pole or the positive pole of the corresponding square battery cell 201. Specifically, a first pole receiving hole is formed in the first transfer element 70, the first pole receiving hole penetrates through the first transfer element 70 along the thickness direction of the first transfer element 70, and the first transfer element 70 is sleeved on the pole of the square battery cell 201 through the first pole receiving hole; the second adapter element 80 is provided with a second pole receiving hole, the second pole receiving hole penetrates through the second adapter element 80 along the thickness direction of the second adapter element 80, and the second adapter element 80 is sleeved on the pole of the square battery cell 201 through the second pole receiving hole.
In the present embodiment, as shown in fig. 1 to 3 and fig. 6, the first electrical connection sheet 101 and the second electrical connection sheet 102 are both of a two-step structure. The number of the first adapter elements 70 and the second adapter elements 70 is matched to the number of the square battery cells 201. According to the actual series-parallel connection requirement of the square battery module, one part of the first transfer element 70 is sleeved on the positive pole of one corresponding part of the square battery monomer 201 through the first pole accommodating hole, and the other part of the first transfer element is sleeved on the negative pole of the other corresponding part of the square battery monomer 201 through the first pole accommodating hole. Correspondingly, one part of the second adapter element 80 is sleeved on the corresponding negative pole of one part of the square battery cells 201 through the second pole accommodating hole, and the other part of the second adapter element 80 is sleeved on the corresponding positive pole of the other part of the square battery cells 201 through the second pole accommodating hole.
In the embodiment, the other end of the first conductive element is electrically connected with the positive pole and the negative pole of the square battery cell correspondingly through the first switching element and the second switching element, so that on one hand, the square battery cell can be better protected, and the reliability of electrical connection is further improved; on the other hand does benefit to the single echelon utilization of battery, and battery module disassembles the back promptly, can guarantee the single intact of battery to realize the single echelon utilization of battery.
In other alternative embodiments, it is also possible to provide: one end of each first conductive element corresponding to the first electric connection sheet is connected to the first electric connection sheet, and the other end of each first conductive element is connected to the positive pole or the negative pole of the corresponding square battery monomer; one end of each first conductive element corresponding to the second electric connection sheet is connected to the second electric connection sheet, and the other end of each first conductive element is connected to the negative pole column or the positive pole column of the corresponding square battery monomer. That is, the other end of the first conductive element is directly electrically connected to the positive or negative electrode post of the prismatic battery cell, which is a simple structure and facilitates grouping of the prismatic battery modules.
In this embodiment, the first conductive element is a copper bar, the cross section of the copper bar is square, and the second conductive element is a copper wire. In other alternative embodiments, the first conductive element may also be a copper bar with a square or cylindrical cross section or a cylindrical cross section, and the second conductive element may also be a copper bar, an aluminum bar or an aluminum wire. The first conductive element described herein is used for electrical connection and the second conductive element is used for electrical signal detection, so the cross-section of the first conductive element is generally larger than the cross-section of the second conductive element.
As shown in fig. 1 to 5, the prismatic battery module further includes a mounting bracket 90 pressed to the battery pack 20, and the mounting bracket 90 includes a bracket body 901, a first support plate 902, and a second support plate 903. The bracket body 901 is provided with a plurality of first receiving grooves 9011 and a plurality of second receiving grooves 9012, the plurality of first receiving grooves 9011 are arranged in a one-to-one correspondence with the plurality of first adapter elements 70, the plurality of second receiving grooves 9012 are arranged in a one-to-one correspondence with the plurality of second adapter elements 80, each of the first receiving grooves 9011 and the second receiving grooves 9012 penetrates through the bracket body 901 along the thickness direction of the bracket body 901, at least a part of each of the first adapter elements 70 penetrates through the corresponding first receiving groove 9011, and at least a part of each of the second adapter elements 80 penetrates through the corresponding second receiving groove 9012. The first support plate 902 is erected on the bracket body 901 along the length direction of the bracket body 901, and the first electric connection sheet 101 is pressed on the first support plate 902. The second support plate 903 is erected on the support body 901 along the length direction of the support body 901, the second electric connecting sheet 102 is pressed on the second support plate 903, and the first support plate 902 and the second support plate 903 are arranged oppositely.
In this embodiment, the first support plate and the second support plate can both support the first electrical connection sheet and the second electrical connection sheet and protect the first electrical connection sheet and the second electrical connection sheet. Meanwhile, the first electric connection sheet and the second electric connection sheet are arranged above the square battery monomer, so that the space of the square battery monomer is not occupied, and the space utilization rate is improved.
As shown in fig. 4-9, a plurality of first positioning posts 9021 are disposed on the first supporting plate 902, and a plurality of first positioning holes 1011 adapted to the plurality of first positioning posts 9021 are disposed on the first electrical connecting piece 101; a plurality of second positioning posts 9031 are disposed on the second support plate 903, and a plurality of second positioning holes 1021 matched with the plurality of second positioning posts 9031 are disposed on the second electrical connection sheet 102.
In this embodiment, the first electrical connection tab is connected to the first support plate by a fastener, and the second electrical connection tab is connected to the second support plate by a fastener. In other alternative embodiments, the first electrical connection sheet may be connected to the first support plate by ultrasonic welding or thermal welding, and the second electrical connection sheet may be connected to the second support plate by ultrasonic welding or thermal welding.
Further, as shown in fig. 4 to 9, the first support plate 902 has a head end and a tail end, the head end of the first support plate 902 has a first end positioning plate 9022, the first end positioning plate 9022 is for limiting the movement of the first electrical connection sheet 101 relative to the first support plate 902 in the length direction of the first support plate 902; the second support plate 903 has a head end and a tail end, and the tail end of the second support plate 903 has a second end positioning plate 9032, and the second end positioning plate 9032 is used to restrict movement of the second electrical connection tab 102 relative to the second support plate 903 in the length direction of the second support plate 903.
Further, as shown in fig. 4 to 9, a first side positioning plate 9023 is provided on a side of the first support plate 902 away from the positive posts of the prismatic battery cells, the first side positioning plate 9023 being for restricting movement of the first electrical connection sheet 101 with respect to the first support plate 902 in the width direction of the first support plate 902; a second side positioning plate 9033 is arranged on one side, away from the negative pole of the square battery cell, of the second support plate 903, and the second side positioning plate 9033 is used for limiting the second electric connecting sheet 102 to move relative to the second support plate 903 along the width direction of the second support plate 903; an accommodating area is defined by the support body 901, the first side positioning plate 9023 and the second side positioning plate 9033, and the signal acquisition board 30 is located in the accommodating area.
Further, as shown in fig. 4 to 9, a plurality of first grooves 9024 are disposed on the first side positioning plate 9023, and the first grooves 9024 are configured to accommodate a second conductive element connected to the first electrical connection pad 101; the second side positioning plate 9033 is provided with a plurality of second grooves 9034, and the second grooves 9034 are used for accommodating second conductive elements connected to the second electrical connection sheet 102. The first side positioning plate 9023 extends from the head end of the first support plate 902 to the tail end of the first support plate 902, and the first side positioning plate 9023 and the first end positioning plate 9022 form an integral structure; the second side positioning plate 9033 extends from the head end of the second support plate 903 to the tail end of the second support plate 903, and the second side positioning plate 9033 and the second end positioning plate 9032 are integrally formed.
Further, as shown in fig. 1 to 3 and fig. 6 to 9, a first connecting plate 1012 is disposed at an end of the first electrical connecting sheet 101 away from the first end positioning plate 9022, a second connecting plate 1022 is disposed at an end of the second electrical connecting sheet 102 away from the second end positioning plate 9032, and the first connecting plate 1012 and the second connecting plate 1022 are used for external connection of the prismatic battery module.
Further, as shown in fig. 4 to 9, two sets of side positioning pillars 9013 and one set of middle positioning pillar 9014 are disposed on the support body 901, and the middle positioning pillar 9014 is located between the two sets of side positioning pillars 9013; two groups of side positioning holes 301 and a group of middle positioning holes 302 are arranged on the signal acquisition board 30, the two groups of side positioning holes 301 are matched with the two groups of side positioning columns 9013, and the middle positioning holes 302 are matched with the middle positioning columns 9014.
In the present embodiment, the signal pickup plate 30 is connected to the holder main body 901 by ultrasonic welding. In other alternative embodiments, the signal collecting board 30 may be connected to the bracket body 901 by thermal welding or fastening.
As shown in fig. 7 and 9, two connectors 303 are disposed at two ends of the signal collecting board 30, and the two connectors 303 are used for being electrically connected with external electrical components to output the collected voltage to the outside. In the present embodiment, the signal collection plate 30 is an integrally molded epoxy resin hard plate. In other alternative embodiments, the signal acquisition board 30 may be a flexible board formed of a film of polyacetamide.
As shown in fig. 1-4, vertical connection plates 9015 are disposed on both sides of the support body 901, the top cover 405 is fastened to the vertical connection plates 9015, and the top cover 405 and the support body 901 enclose a closed space; bosses are respectively arranged on the top of the head cover 401 and the top of the tail end cover 403, the first connecting plate 1012 is pressed on the boss 4011 of the head cover 401, and the second connecting plate 1022 is pressed on the boss 4031 of the tail end cover 403. In this embodiment, the vertical connecting plate 9015, the bracket body 901, the first support plate 902, and the second support plate 903 are of an integral structure. In addition, insulating plates 407 are respectively provided between the battery pack 20 and the head cover 401, the left side cover 402, the tail cover 403, and the bottom plate 406, and the battery pack 20 and the insulating plates 407 are adhesively connected.
In this embodiment, an insulating plate is interposed between any two adjacent square battery cells 201 in fig. 1 to 3, and the insulating plate between the square battery cells mainly plays a role of protecting the square battery cells, thereby reducing the occurrence of the bulge phenomenon of the square battery cells.
The grouping method of the square battery modules is characterized by comprising the following steps:
step 101, bonding one end of each first conductive element in each group of first conductive elements corresponding to the first electric connection sheet with one side of the first electric connection sheet;
102, bonding the other end of each first conductive element in each group of first conductive elements corresponding to the first electric connection sheet with a first switching element;
103, pressing and electrically connecting the first adapter element to the positive pole of the corresponding square battery monomer;
step 104, bonding one end of each second conductive element in each group of second conductive elements corresponding to the first electric connection sheet with the other side of the first electric connection sheet;
step 105, bonding the other end of each second conductive element in each group of second conductive elements corresponding to the first electric connection sheet with one side of the signal acquisition board;
step 106, bonding one end of each first conductive element in each group of first conductive elements corresponding to the second electric connection sheet with one side of the second electric connection sheet;
step 107, bonding the other end of each first conductive element in each group of first conductive elements corresponding to the second electric connection sheet with the second adapter element;
step 108, pressing and electrically connecting the second switching element to the negative pole of the corresponding square battery monomer;
step 109, bonding one end of each second conductive element in each group of second conductive elements corresponding to the second electric connection sheet with the other side of the second electric connection sheet;
and step 110, bonding the other end of each second conductive element in each group of second conductive elements corresponding to the second electric connection sheet with the other side of the signal acquisition board.
Example 2
The structure of the square battery module in this embodiment is substantially the same as that of the square battery module in embodiment 1, except for the way in which the square battery module is externally connected.
As shown in fig. 10 and 11, threaded holes are formed in the first connecting plate 1012 and the second connecting plate 1022, and the prismatic battery modules are externally connected by fasteners fitted to the threaded holes.
The first connecting plate 1012 and the second connecting plate 1022 are each provided with a terminal communication hole through which the plug terminal 100 is inserted.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims (27)

1. A square battery module comprises an electric connection sheet assembly and a battery pack, wherein the electric connection sheet assembly is arranged above the battery pack, and the battery pack comprises a plurality of square battery monomers;
the electric connection sheet assembly comprises a first electric connection sheet and a second electric connection sheet which are oppositely arranged;
the first conductive assembly comprises a plurality of groups of first conductive elements, one side of the first electric connection sheet is connected with a plurality of groups of first conductive elements, and the plurality of groups of first conductive elements on the first electric connection sheet are arranged in one-to-one correspondence with the positive posts or the negative posts of the square battery monomers;
one side of the second electric connection sheet is connected with a plurality of groups of first conductive elements, and the plurality of groups of first conductive elements on the second electric connection sheet are arranged in one-to-one correspondence with the negative poles or the positive poles of the square battery monomers;
one end of each first conductive element corresponding to the first electric connection sheet is connected to the first electric connection sheet, the other end of each first conductive element is connected to a first adapter element, and the first adapter element is arranged on the top of the square battery monomer in a pressing mode and is electrically connected to the positive pole column or the negative pole column of the corresponding square battery monomer;
one end of each first conductive element corresponding to the second electric connection sheet is connected to the second electric connection sheet, the other end of each first conductive element is connected to a second switching element, and the second switching element is arranged at the top of the square battery monomer in a pressing mode and is electrically connected to the negative pole column or the positive pole column of the corresponding square battery monomer;
the first pole column accommodating hole is formed in the first rotating element, penetrates through the first rotating element along the thickness direction of the first rotating element, and is sleeved on the positive pole column or the negative pole column through the first pole column accommodating hole;
the second adapter element is provided with a second pole column accommodating hole, the second pole column accommodating hole penetrates through the second adapter element along the thickness direction of the second adapter element, and the second adapter element is sleeved on the positive pole column or the negative pole column through the second pole column accommodating hole.
2. The prismatic battery module according to claim 1, wherein the prismatic battery module further comprises a signal collecting board, the signal collecting board is arranged above the battery pack, and the voltage and temperature collection of the prismatic battery cells is realized by bonding between the signal collecting board and the electrical connection sheet assembly.
3. The prismatic battery module according to claim 2, wherein the signal collection plate and the electrical connection tab assembly are bonded to each other by a second conductive member to collect the voltage and temperature of the prismatic battery cell.
4. The square battery module according to claim 3, wherein the electrical connection sheet assembly and the pole of the square battery cell are electrically connected through ultrasonic bonding or laser bonding of the first conductive assembly, and/or the signal acquisition board and the electrical connection sheet assembly are ultrasonically bonded or laser bonded through the second conductive assembly to acquire the voltage and temperature of the square battery cell.
5. The prismatic battery module according to claim 3, wherein the signal collecting plate is positioned between the first electrical connection sheet and the second electrical connection sheet;
the second conductive assembly comprises a plurality of groups of second conductive elements, and the other side of the first electric connecting sheet is connected with a plurality of groups of second conductive elements;
the other side of the second electric connecting sheet is connected with a plurality of groups of second conductive elements;
wherein each set of the first conductive elements on the first and second electrical connection sheets comprises at least one first conductive element, and each set of the second conductive elements on the first and second electrical connection sheets comprises at least one second conductive element.
6. The square battery module according to claim 5, wherein the first conductive element is a copper bar or an aluminum bar, and the second conductive element is a copper bar, an aluminum bar, a copper wire or an aluminum wire.
7. The prismatic battery module according to claim 6, wherein the copper bars and the aluminum bars are both square or cylindrical in cross section.
8. The prismatic battery module according to claim 1, wherein the prismatic battery module further comprises a mounting bracket pressed to the battery pack, the mounting bracket comprising:
the support body is provided with a plurality of first accommodating grooves and a plurality of second accommodating grooves, the first accommodating grooves and the first switching elements are arranged in a one-to-one correspondence mode, the second accommodating grooves and the second switching elements are arranged in a one-to-one correspondence mode, each first accommodating groove and each second accommodating groove penetrate through the support body along the thickness direction of the support body, and at least part of each first switching element penetrates through the corresponding first accommodating groove and at least part of each second switching element penetrates through the corresponding second accommodating groove.
9. The prismatic battery module according to claim 8, wherein the mounting bracket further comprises:
the first support plate is erected on the support body along the length direction of the support body, and the first electric connecting sheet is pressed on the first support plate;
the second backup pad is followed the length direction of support body erects in the support body, the second electricity connection piece is pressed and is located the second backup pad, just first backup pad with the second backup pad sets up relatively.
10. The square battery module according to claim 9, wherein the first support plate is provided with a plurality of first positioning posts, and the first electrical connecting sheet is provided with a plurality of first positioning holes adapted to the plurality of first positioning posts;
the second support plate is provided with a plurality of second positioning columns, and the second electric connecting sheet is provided with a plurality of second positioning holes matched with the second positioning columns.
11. The square battery module according to claim 10, wherein the first electrically connecting tab is connected to the first support plate by ultrasonic welding, thermal welding, or a fastener, and the second electrically connecting tab is connected to the second support plate by ultrasonic welding, thermal welding, or a fastener.
12. The prismatic battery module according to claim 11, wherein the first support plate has a head end and a tail end, the head end of the first support plate having a first end positioning plate for limiting movement of the first electrical connection sheet with respect to the first support plate in a length direction of the first support plate;
the second support plate has a head end and a tail end, and the tail end of the second support plate has a second end positioning plate for limiting the movement of the second electrical connection sheet relative to the second support plate along the length direction of the second support plate.
13. The prismatic battery module according to claim 12, wherein a first side positioning plate for limiting movement of the first electrical connecting sheet with respect to the first support plate in a width direction of the first support plate is provided on a side of the first support plate away from the positive post of the prismatic battery cell;
a second side edge positioning plate is arranged on one side, away from the negative pole of the square battery monomer, of the second supporting plate and used for limiting the second electric connecting sheet to move relative to the second supporting plate along the width direction of the second supporting plate;
the square battery module also comprises a signal acquisition board, the signal acquisition board is arranged above the battery pack, and the signal acquisition board and the electric connecting piece assembly are bonded to realize voltage and temperature acquisition of the single square battery;
the bracket body, the first side positioning plate and the second side positioning plate are enclosed to form an accommodating area, and the signal acquisition plate is located in the accommodating area.
14. The square battery module according to claim 13, wherein the signal acquisition board and the electrical connection tab assembly are bonded to each other by a second conductive assembly to acquire the voltage and temperature of the square battery cell, the second conductive assembly comprises a plurality of sets of second conductive elements, the other side of the first electrical connection tab is connected to the plurality of sets of second conductive elements, and the other side of the second electrical connection tab is connected to the plurality of sets of second conductive elements;
a plurality of first grooves are formed in the first side positioning plate and used for accommodating the second conductive elements connected to the first electric connecting sheets;
and the second side edge positioning plate is provided with a plurality of second grooves, and the second grooves are used for accommodating the second conductive elements connected to the second electric connection sheet.
15. The prismatic battery module according to claim 14, wherein the first side positioning plate extends from the head end of the first support plate to the tail end of the first support plate, and the first side positioning plate and the first end positioning plate are of an integral structure;
the second side positioning plate extends to the tail end of the second supporting plate from the head end of the second supporting plate, and the second side positioning plate and the second end positioning plate are of an integral structure.
16. The prismatic battery module according to claim 12, wherein a first connecting plate is provided at an end of the first electrical connecting sheet remote from the first end positioning plate;
a second connecting plate is arranged at one end, far away from the second end positioning plate, of the second electric connecting sheet;
the first connecting plate and the second connecting plate are used for externally connecting the square battery module.
17. The prismatic battery module according to claim 16, wherein the first connecting plate and the second connecting plate are each provided with a screw hole, and the prismatic battery module is externally connected by a fastener fitted to the screw hole.
18. The prismatic battery module according to claim 16, wherein the first connecting plate and the second connecting plate each have a terminal communication hole in which a socket terminal is inserted.
19. The prismatic battery module according to claim 13, wherein the frame body is provided with two sets of side positioning columns and a set of middle positioning column, and the middle positioning column is located between the two sets of side positioning columns;
the signal acquisition board is provided with two groups of side positioning holes and a group of middle positioning holes, the two groups of side positioning holes are matched with the two groups of side positioning columns, and the middle positioning holes are matched with the middle positioning columns.
20. The prismatic battery module according to claim 19, wherein the signal collecting plate is coupled to the bracket body by ultrasonic welding, thermal welding, or a fastener.
21. The prismatic battery module according to claim 13, wherein the signal collecting plate is provided at both ends thereof with two connectors for electrically connecting with an external electric component to externally output the collected voltage.
22. The prismatic battery module according to claim 16, wherein the height direction of each prismatic battery cell is parallel to the height direction of the prismatic battery module, the prismatic battery module further comprises a housing, the housing comprises a head cover, a left cover, a tail cover, a right cover, a top cover and a bottom plate, the head cover, the left cover, the tail cover and the right cover are sequentially connected end to end, the top cover and the bottom plate are oppositely arranged, the bottom plate is adjacent to the head cover, the left cover, the tail cover and the right cover, the head cover, the left cover, the tail cover, the right cover and the bottom plate enclose an accommodating cavity, and the battery pack is disposed in the accommodating cavity;
the two sides of the bracket body are respectively provided with a vertical connecting plate, the top cover is buckled with the vertical connecting plates, and the top cover and the bracket body enclose a closed space;
the top of the head end cover and the top of the tail end cover are respectively provided with a boss, the first connecting plate is arranged on the boss of the head end cover in a pressing mode, and the second connecting plate is arranged on the boss of the tail end cover in a pressing mode.
23. The prismatic battery module according to claim 22, wherein an insulating plate is provided between the battery pack and the head cap, the left cap, the tail cap, and the bottom plate, and the battery pack is adhesively connected to the insulating plate.
24. The prismatic battery module according to claim 22, wherein the vertical connection plate, the bracket body, the first support plate and the second support plate are of an integral structure.
25. The prismatic battery module according to any one of claims 2 to 7, 13 to 15, and 19 to 21, wherein the signal collecting plate is an integrally molded epoxy resin hard plate or a polyacetamide film molded flexible plate.
26. The square battery module according to any of claims 1-24, wherein an insulating plate is sandwiched between any adjacent two of the square battery cells.
27. A grouping method of the prismatic battery module according to claim 1, wherein the grouping method comprises the steps of:
S10bonding the electric connection sheet assembly with a plurality of posts of the square battery monomer;
the square battery module further comprises a signal acquisition board, the signal acquisition board is arranged above the battery pack, and the voltage and temperature acquisition of the single square battery is realized between the signal acquisition board and the electric connecting piece assembly through bonding a second conductive assembly; the signal acquisition board is positioned between the first electric connection sheet and the second electric connection sheet, and the second conductive assembly comprises a plurality of groups of second conductive elements; each set of the first conductive elements comprises at least one first conductive element and each set of the second conductive elements comprises at least one second conductive element;
step S10The method comprises the following steps:
S101: bonding one end of each first conductive element in each group of first conductive elements corresponding to the first electric connection sheet with one side of the first electric connection sheet;
S102: bonding the other end of each first conductive element in each group of first conductive elements corresponding to the first electric connecting sheet with a first switching element;
S103: the first adapter element is pressed on and electrically connected to the positive pole of the corresponding square battery monomer;
S104: bonding one end of each second conductive element in each group of second conductive elements corresponding to the first electric connection sheet with the other side of the first electric connection sheet;
S105: each group of second conductive sheets corresponding to the first electric connection sheetThe other end of each second conductive element in the elements is bonded with one side of the signal acquisition board;
S106: bonding one end of each first conductive element in each group of first conductive elements corresponding to the second electric connection sheet with one side of the second electric connection sheet;
S107: bonding the other end of each first conductive element in each group of first conductive elements corresponding to the second electric connecting sheet with the second adapter element;
S108: the second switching element is pressed on and electrically connected to the negative pole column of the corresponding square battery monomer;
S109: bonding one end of each second conductive element in each group of second conductive elements corresponding to the second electric connection sheet with the other side of the second electric connection sheet;
S110: and bonding the other end of each second conductive element in each group of second conductive elements corresponding to the second electric connecting sheets with the other side of the signal acquisition board.
CN201710476117.0A 2017-06-21 2017-06-21 Square battery module and grouping method thereof Active CN109103368B (en)

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CN202210281757.7A CN114614205A (en) 2017-06-21 2017-06-21 Electric connection device, square battery module and grouping method thereof
CN201710476117.0A CN109103368B (en) 2017-06-21 2017-06-21 Square battery module and grouping method thereof

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CN201710476117.0A CN109103368B (en) 2017-06-21 2017-06-21 Square battery module and grouping method thereof

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