WO2022213696A1 - 一种免焊式锂电池组 - Google Patents

一种免焊式锂电池组 Download PDF

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Publication number
WO2022213696A1
WO2022213696A1 PCT/CN2022/071312 CN2022071312W WO2022213696A1 WO 2022213696 A1 WO2022213696 A1 WO 2022213696A1 CN 2022071312 W CN2022071312 W CN 2022071312W WO 2022213696 A1 WO2022213696 A1 WO 2022213696A1
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WO
WIPO (PCT)
Prior art keywords
pcb board
battery pack
holes
clamping
elastic contact
Prior art date
Application number
PCT/CN2022/071312
Other languages
English (en)
French (fr)
Inventor
田甜
Original Assignee
浙江丰锂科技发展有限公司
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Publication of WO2022213696A1 publication Critical patent/WO2022213696A1/zh

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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
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
    • H01M50/287—Fixing of circuit boards to lids or covers
    • 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
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H01M50/291—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—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
    • 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

Definitions

  • the invention relates to the technical field of battery pack assembly, in particular to a solder-free lithium battery pack.
  • the battery pack is an independent and reliable power source, which is not affected by the AC power source. In the event of a power failure, it can still ensure that the electrical equipment in the DC system works reliably and continuously, and the voltage is stable.
  • lithium battery packs are the most widely used because of the characteristics of lithium batteries.
  • Existing lithium battery packs generally assemble multiple lithium batteries together by welding. However, the welding operation is difficult, and the technical requirements for assemblers are high, which increases the difficulty of assembly.
  • the traditional lithium battery pack can only be scrapped because the single lithium battery cannot be disassembled and replaced, which greatly increases the maintenance. cost. .
  • the purpose of the present invention is to propose a solder-free lithium battery pack in order to solve at least one shortcoming existing in the prior art.
  • an embodiment of the present invention provides a solder-free lithium battery pack, including a snap-on chassis, a first PCB board, a first battery pack, a second PCB board, a second battery pack, a third PCB board, Top fastener and multiple fastener bars.
  • the buckle chassis has a plurality of first clamping columns and a plurality of first connection holes.
  • the first PCB board is fixed on the front side of the buckle chassis, the first PCB board has a plurality of first clamping holes and a plurality of first elastic contact pieces, and the plurality of first clamping holes are engaged with a plurality of first clamping posts for fixing Connect the first PCB board and the snap-on chassis.
  • the first battery pack is fixed on the front side of the first PCB board, and the first battery pack has a plurality of second clamping posts, a plurality of first battery cells and a plurality of second connection holes.
  • the second PCB board is fixed on the front side of the first battery pack.
  • the second PCB board has a plurality of second locking holes and a plurality of second elastic contact pieces.
  • the plurality of second locking holes and the plurality of second locking posts are engaged to The second PCB board and the first battery pack are fixedly connected.
  • the plurality of first elastic contact pieces are in close contact with the rear ends of the plurality of first cells and the plurality of second elastic contact pieces are in close contact with the front ends of the plurality of first cells so as to connect the plurality of first cells in series or in parallel. Together.
  • the second battery pack is fixed on the front side of the second PCB board, and the second battery pack has a plurality of third clamping posts, a plurality of second battery cells and a plurality of third connection holes.
  • the third PCB board is fixed on the front side of the second battery pack, and the third PCB board has a plurality of third clamping holes and a plurality of third elastic contact pieces.
  • the plurality of third clamping holes are engaged with the plurality of third clamping posts to fixedly connect the third PCB board and the second battery pack.
  • the plurality of second elastic contacts are in close contact with the rear ends of the plurality of second cells and the plurality of third elastic contacts are in close contact with the front ends of the plurality of second cells so as to connect the plurality of second cells in series or in parallel.
  • the top fastener is fixed on the front side of the third PCB board, and the top fastener has a plurality of fourth connection holes.
  • the plurality of buckle rods respectively pass through the fourth connection hole, the third connection hole, the second connection hole and the first connection hole in sequence to fix the top buckle, the second battery pack, the first battery pack and the buckle chassis together.
  • the first PCB board has a plurality of first through holes
  • the second PCB board has a plurality of second through holes
  • the third PCB board has a plurality of third through holes
  • at least one buckle rod passes through the first through holes in sequence.
  • Four connection holes, third through holes, third connection holes, second through holes, second connection holes, first through holes and first connection holes to connect the top fastener, the third PCB board, the second battery pack, the second PCB board , the first battery pack, the first PCB board and the buckled chassis are fixed together.
  • the solderless lithium battery pack further includes a first wiring harness, a second wiring harness and a battery management module, and one end of the first wiring harness is electrically connected to the first PCB board, the second PCB board and the third PCB
  • the other end of the first wire harness is electrically connected to the battery management module
  • the second wire harness is electrically connected to the first battery pack and the second battery pack
  • the other end of the second wire harness is electrically connected to the battery management module.
  • the top fastener has a first slot and a second slot, the first slot fixes a part of the first wire harness, and the second slot fixes a part of the second wire harness
  • the first PCB board, the second PCB board, and the third PCB board all have jacks, one end of the first wire harness has a plug, and the plug is inserted into the jack to collect the first PCB board, the second Voltage and temperature information of the PCB board and the third PCB board.
  • both the first battery pack and the second battery pack have a wire clamping structure, and the wire clamping structure fixes a portion of the first wire harness.
  • the first, second, and third elastic contact members are reed structures, the first elastic contact member protrudes toward the front side of the first PCB board, and the second elastic contact member faces the second PCB The front and rear sides of the board protrude, and the third elastic contact piece protrudes toward the rear side of the third PCB board.
  • the solderless lithium battery pack further includes a third battery pack and a fourth PCB board, the fourth PCB board is fixed on the front side of the first battery pack, and the third battery pack is fixed on the fourth PCB On the front side of the board, the second PCB board is fixed on the front side of the third battery pack.
  • each of the first elastic contact piece, the second elastic contact piece or the third elastic contact piece has six metal reeds, and the three metal reeds arranged at intervals protrude to one side.
  • both the second PCB board and the third PCB board have bus bars to collect current or voltage of the entire PCB board.
  • the plurality of locking rods are a plurality of long bolts.
  • the present invention firmly fixes a plurality of battery packs and PCB boards together through the cooperation of the clamping posts and the clamping holes and the cooperation of the buckle rods and the connecting holes.
  • the structure of the battery pack provided by the present invention is simpler to assemble, greatly reduces the difficulty of assembly, and reduces the cost of assembly. And it is easier to split and replace a single or multiple batteries later, which reduces subsequent maintenance costs.
  • the electrical connection between the PCB board and the battery pack is stable and reliable.
  • Fig. 1 is a three-dimensional schematic diagram of a disassembled structure of a welding-free lithium battery pack proposed by the first embodiment of the present invention
  • FIG. 2 is a front view of a solder-free lithium battery pack proposed in the first embodiment of the present invention
  • FIG. 3 is a rear view of a solderless lithium battery pack proposed in the first embodiment of the present invention.
  • FIG. 4 is a top view of a disassembled structure of a solder-free lithium battery pack proposed in the first embodiment of the present invention
  • FIG. 5 is a side view of a disassembled structure of a solder-free lithium battery pack proposed in the first embodiment of the present invention
  • FIG. 6 is a schematic diagram of a buckle chassis of a solder-free lithium battery pack according to the first embodiment of the present invention
  • FIGS. 7A-7B are schematic diagrams of two different angles of the first PCB board of a solder-free lithium battery pack according to the first embodiment of the present invention.
  • FIGS. 8A-8B are schematic diagrams of two different angles of a first battery pack of a solderless battery pack according to the first embodiment of the present invention.
  • 9A-9B are schematic diagrams of two different angles of a second PCB board of a solder-free lithium battery pack according to the first embodiment of the present invention.
  • 10A-10B are schematic diagrams of two different angles of a second battery pack of a solder-free lithium battery pack proposed in the first embodiment of the present invention.
  • 11A-11B are schematic diagrams of two different angles of a third PCB board of a solderless lithium battery pack proposed in the first embodiment of the present invention.
  • FIG. 12 is a schematic diagram of another angle of the top fastener of a solder-free lithium battery pack according to the first embodiment of the present invention.
  • FIG. 13 is a schematic perspective view of a disassembled structure of a solder-free lithium battery pack proposed in the second embodiment of the present invention.
  • FIG. 14 is a top view of a disassembled structure of a solder-free lithium battery pack proposed in the second embodiment of the present invention.
  • 15 is a side view of a disassembled structure of a solderless lithium battery pack proposed in the second embodiment of the present invention.
  • a solder-free lithium battery pack provided by the first embodiment of the present invention includes a snap-on chassis 1, a first PCB board 2, a first battery pack 3, a second PCB board 22, and a second battery A group 5 , a third PCB board 6 , a top fastener 7 and a plurality of fastener rods 10 .
  • the buckle chassis 1 has a plurality of first clamping columns 101 and a plurality of first connection holes 103 .
  • the number of the first clamping posts 101 is two, and the number of the first connecting holes 103 is four.
  • the fastening chassis 1 may have four first locking posts and six first connecting holes.
  • the four first connecting holes 103 are respectively located near the four corners of the fastening chassis 1
  • the two first locking posts 101 are respectively located at both ends of the front surface of the fastening chassis 1 .
  • the first clamping column is a columnar body with four protruding edges and a small front end and a large rear end.
  • the present invention does not limit the specific shape of the first clamping column, as long as the clamping column can cooperate with the clamping hole to realize the locking and positioning function.
  • the fastening chassis 1 has a plurality of reinforcing ribs 102 to enhance the strength of the fastening chassis 1 , thereby improving the bending resistance of the fastening chassis 1 .
  • the first PCB board 2 is fixed on the front side of the buckle chassis 1 .
  • the first PCB board 2 has a plurality of first clamping holes 201 , a plurality of first elastic contacts 202 and a socket 203 .
  • the plurality of first clamping holes 201 are engaged with the plurality of first clamping posts 101 to fixedly connect the first PCB board 2 and the buckling chassis 1 .
  • the inner diameter of the first clamping hole 201 is larger than the outer diameter of the front end of the first clamping column 101 but smaller than the outer diameter of the rear end of the first clamping column 101 . Therefore, when the first clamping column is inserted into the first clamping hole, the two are firmly fixed. snap together.
  • the number of the first clamping holes 201 corresponds to the number of the first clamping pillars 101 , and both are two.
  • the first PCB board 2 further has a plurality of first through holes 204 , and the number of the first through holes 204 is less than the number of the first connection holes 103 , which is three.
  • the present invention does not make any limitation on this.
  • the number of the first card holes 201 may be four, and the number of the first through holes may be equal to the number of the first connection holes.
  • the first battery pack 3 is fixed on the front side of the first PCB board 2 , and the first battery pack 3 has a plurality of second clamping posts 301 , a plurality of first battery cells 302 and a plurality of second connection holes 303 .
  • the first battery pack 3 includes an outer frame, and a plurality of lithium batteries are fixed in the outer frame, and the lithium batteries are connected in series or in parallel.
  • each first elastic contact piece 202 has six metal reeds, and the three metal reeds arranged at intervals protrude toward the front side of the first PCB board 2 to abut the first battery core 302 , so as to realize the electrical contact connection between the first PCB board 2 and the first battery pack 3 .
  • the shape of the second clamping column 301 is the same as that of the first clamping column 101 .
  • the manufacture of the entire battery pack and the PCB board can be easily standardized, thereby reducing the manufacturing cost.
  • the present invention does not make any limitation to this.
  • the second clamping column 301 may have a different shape from that of the first clamping column 101 , as long as it can cooperate with the clamping hole to achieve a clamping effect.
  • the first battery pack 3 further includes two wire-clamping structures 304 .
  • the wire clamping structure 304 has two extending walls with different lengths, and an opening is formed in the middle of the extending walls, so that the wire harness can enter through the opening and be clamped under the extending walls, as shown in FIG. 1 .
  • the present invention does not make any limitation on the specific structure of the wire clamping structure 304 .
  • the wire clamping structure may be in the shape of a clip or a groove.
  • the second PCB board 22 is fixed on the front side of the first battery pack 3 , and the second PCB board 22 has a plurality of second clamping holes 222 and a plurality of second elastic contact members 223 .
  • the plurality of second locking holes 222 are engaged with the plurality of second locking posts 301 to fixedly connect the second PCB board 22 and the first battery pack 3 .
  • the second elastic contact member 223 has six metal springs, and the three metal springs arranged at intervals protrude toward the front side of the second PCB board 22 to abut against the second battery core 502 , and the other three Each of the metal springs protrudes toward the rear side of the second PCB board 22 to abut against the first battery core 302 .
  • the plurality of first elastic contact pieces 202 are in close contact with the rear ends of the plurality of first cells 302 and the plurality of second elastic contact pieces 223 are in close contact with the front ends of the plurality of first cells 302 so that the A plurality of first cells 302 are connected in series or in parallel.
  • the front end and rear end mentioned in this embodiment are only for the front end along the central axis (not shown) of the battery pack shown in FIG.
  • the back end is the negative.
  • the front end of the first battery cell 302 is the positive electrode of a part of the battery and the negative electrode of another part of the battery.
  • the number of the second clamping holes 222 corresponds to the number of the second clamping posts 301 , which are two.
  • the second PCB board 22 also has a plurality of second through holes 221 , and the number of the second through holes 221 is less than the number of the second connection holes 303 , which is three.
  • the present invention does not make any limitation on this.
  • the number of the second clamping holes may be four, and the number of the second through holes may be equal to the number of the second connecting holes.
  • the second PCB board 22 has the bus bar 4 for collecting the current or voltage of the entire second PCB board 22 .
  • the total current or voltage of all batteries connected in series or in parallel electrically connected to the second PCB board is drawn from the bus bar.
  • the overcurrent capability of the area is enhanced to prevent the entire PCB board from overheating.
  • the second battery pack 5 is fixed on the front side of the second PCB board 22 , and the second battery pack 5 has a plurality of third connection holes 501 , a plurality of second battery cells 502 and a plurality of third locking posts 503 .
  • the second battery pack 5 has a structure similar to that of the first battery pack 3, that is, the second battery pack 5 includes an outer frame, and a plurality of lithium batteries are fixed in the outer frame, and these lithium batteries are connected in series or in parallel. connection relationship.
  • the second battery pack 5 also has at least one wire clamping structure.
  • the function and specific structure of the wire clamping structure of the second battery pack 5 are exactly the same as the function and specific structure of the wire clamping structure of the first battery pack, and will not be described in detail here.
  • the third PCB board 6 is fixed on the front side of the second battery pack 5 , and the third PCB board 6 has a plurality of third clamping holes 602 and a plurality of third elastic contact members 601 .
  • the plurality of third clamping holes 602 are engaged with the plurality of third clamping posts 503 to fixedly connect the third PCB board 6 and the second battery pack 5 .
  • the ends are in close contact and the plurality of third elastic contacts 601 are in close contact with the front ends of the plurality of second cells 502 so as to connect the plurality of second cells 502 in series or in parallel.
  • each third elastic contact member 601 has six metal reeds, and the three metal reeds arranged at intervals protrude toward the rear side of the third PCB board 6 to abut against the second battery core 502 , so as to realize the electrical contact connection between the third PCB board 6 and the second battery pack 5 .
  • the third PCB board 6 also has a bus bar 41 for collecting the current or voltage of the entire third PCB board 6 .
  • the present invention does not make any limitation to this.
  • the first PCB board may also have bus bars.
  • the top fastener 7 is fixed on the front side of the third PCB board 6 , and the top fastener 7 has a plurality of fourth connection holes 703 .
  • the fourth connection hole 703 , the third connection hole 501 , the second connection hole 303 and the first connection hole 103 have the same size and quantity.
  • the present invention is not limited to this.
  • the plurality of buckle rods 10 respectively pass through the fourth connection hole 703 , the third connection hole 501 , the second connection hole 303 and the first connection hole 103 to connect the top buckle 7 , the second battery pack 5 , and the first battery pack 3 . It is fixed together with the snap bottom 1 plate.
  • the buckle rod 10 has a long bolt structure, one end has an external thread, and the other end has a nut.
  • the first connection hole 103 has an internal thread, and the rod body part of the buckle rod 10 is passed through the fourth connection hole 703 , the third connection hole 501 and the second connection hole 303 in sequence, and finally the end of the buckle rod 10 with the external thread is connected to the first connection
  • the inner thread of the hole 103 is fixed.
  • the other end of the buckle rod 10 is clamped at the fourth connection hole 703 through a nut.
  • the present invention does not make any limitation on the specific structure of the buckle rod 10 .
  • the first PCB board 2 has a plurality of first through holes 204
  • the second PCB board 22 has a plurality of second through holes 221
  • the third PCB board 6 has a plurality of third through holes 603
  • the rod 10 passes through the fourth connection hole 703 , the third through hole 603 , the third connection hole 501 , the second through hole 221 , the second connection hole 303 , the first through hole 201 and the first
  • the components 7 , the second battery pack 5 , the second PCB board 22 , the first battery pack 3 , the first PCB board 2 and the buckle chassis 1 are fixed together.
  • the number of through holes is less than the number of connection holes, some of the buckle rods do not pass through the PCB board but directly connect to each battery pack across the PCB board.
  • the shape of the PCB board should be designed accordingly, so that the buckle rod can pass over or through the PCB board.
  • the solderless lithium battery pack further includes a first wire harness 8 , a second wire harness 81 and a battery management module 9 .
  • One end of the first wire harness 8 is electrically connected to the first PCB 2 , the second PCB 22 and the third PCB 6 , and the other end of the first wire harness 8 is electrically connected to the battery management module 9 .
  • the second wire harness 81 is electrically connected to the first battery pack 3 and the second battery pack 5 , and the other end of the second wire harness 81 is electrically connected to the battery management module 9 .
  • the first PCB board 2 , the second PCB board 22 and the third PCB board 6 all have jacks 203 , one end of the first wire harness 8 has a plug 802 , and the plug 802 is inserted into the jack to collect the first PCB board 2 , the voltage and temperature information of the second PCB board 22 and the third PCB board 6 .
  • the other end of the first wire harness 8 has a plug 801 , and the plug 801 is inserted into the slot 901 of the battery management module 9 so as to transmit the collected corresponding information to the battery management module 9 .
  • the second wiring harness 81 is a power wiring harness that carries a relatively large current and is used for the output of the first battery pack 3 and the second battery pack 5 .
  • the top fastener 7 has a first slot 701 and a second slot 702 .
  • the first slot 701 fixes a part of the first wire harness 8
  • the second slot 702 fixes a part of the second wire harness 81 .
  • connecting holes are provided on the two end plates and each battery pack, and then the locking rods are passed through the connecting holes in sequence to assemble the components in series.
  • the PCB board is fixed between two battery packs, or between the battery pack and two end plates. Since the fixing force of the entire battery pack is inward, the electrical contact between the battery pack and the PCB board will be very reliable. Achieve stable and continuous power or signal transmission. Even if the battery pack is used in a vibration environment, the electrical connection between the battery pack and the PCB will not be disconnected. Compared with the traditional welding fixing method, the welding-free battery pack of this embodiment is all detachably connected. The assembly difficulty is greatly reduced, and the assembly cost is reduced. After one end of use, if an individual battery pack fails, it can also be disassembled to replace a single battery pack, reducing subsequent maintenance costs.
  • FIGS. 13-15 are schematic diagrams showing the disassembled structure of the solderless lithium battery pack provided by the second embodiment of the present invention.
  • the first wire harness 8, the second wire harness 81, the circuit board 9, and the buckle rod 10 have the same structure as the first embodiment.
  • the second embodiment has two first battery packs and two second PCB boards.
  • the two first battery packs are named as the first battery pack 3 and the third battery pack 31 respectively
  • the two second PCB boards 22 are named as the second PCB board 22 and the fourth PCB board 21 respectively.
  • the direction of the lower left corner along the central axis (not shown) of the battery pack in FIG. 13 is defined as the front, and the direction of the upper right corner is defined as the rear.
  • the fourth PCB board 21 is fixed to the front side of the first battery pack 3
  • the third battery pack 31 is fixed to the front side of the fourth PCB board 21
  • the second PCB board 22 is fixed to the front side of the third battery pack 31 .
  • the present invention is not limited to this. In other embodiments, there may be more than 3 first battery packs and more than 3 second PCB boards.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

本发明公开了一种免焊式锂电池组，包括扣接底盘、第一PCB板、第一电池组、第二PCB板、第二电池组、第三PCB板、顶扣件以及多个扣杆。多个扣杆将顶扣件、第二电池组、第一电池组和扣接底盘固定在一起。本发明提供的免焊式锂电池组结构简单，卡接稳定，不但安全性高，且易于拆装和替换。

Description

一种免焊式锂电池组 技术领域
本发明涉及电池组组装技术领域，尤其涉及一种免焊式锂电池组。
背景技术
电池组是一种独立可靠的电源，它不受交流电源影响，在停电的情况下，仍能保证直流系统中的用电设备可靠而连续地工作，且电压平稳。其中，锂电池组因为锂电池的特性，应用最为广泛。现有的锂电池组一般通过焊接的方式将多个锂电池组装在一起。但是焊接操作难度大，对组装人员的技术要求高，增加了组装难度。当锂电池组使用一段时间后，若其中一个或多个锂电池发生故障，传统的锂电池组因为无法拆分和替换单个的锂电池，只能整个锂电池组进行报废，大幅度增加了维护成本。。
发明内容
本发明的目的是为了解决现有技术中存在的至少一个缺点，提出的一种免焊式锂电池组。
为了实现上述目的，本发明一实施例提供一种免焊式锂电池组，包括扣接底盘、第一PCB板、第一电池组、第二PCB板、第二电池组、第三PCB板、顶扣件以及多个扣杆。扣接底盘具有多个第一卡柱和多个第一连接孔。第一PCB板固定于扣接底盘的前侧，第一PCB板具有多个第一卡孔和多个第一弹性接触件，多个第一卡孔与多个第一卡柱卡合以固定连接第一PCB板和扣接底盘。第一电池组固定于第一PCB板的前侧，第一电池组具有多个第二卡柱、多个第一电芯以及多个第二连接孔。第二PCB板固定于第一电池组的前侧，第二PCB板具有多个第二卡孔和多个第二弹性接触件，多个第二卡孔与多个第二卡柱卡合以固定连接第二PCB板和第一电池组。多个第一弹性接 触件与多个第一电芯的后端紧密接触并且多个第二弹性接触件与多个第一电芯的前端紧密接触从而将多个第一电芯串联或并联在一起。第二电池组固定于第二PCB板的前侧，第二电池组具有多个第三卡柱、多个第二电芯以及多个第三连接孔。第三PCB板固定于第二电池组的前侧，第三PCB板具有多个第三卡孔和多个第三弹性接触件。多个第三卡孔与多个第三卡柱卡合以固定连接第三PCB板和第二电池组。多个第二弹性接触件与多个第二电芯的后端紧密接触并且多个第三弹性接触件与多个第二电芯的前端紧密接触从而将多个第二电芯串联或并联在一起；顶扣件固定于第三PCB板的前侧，顶扣件具有多个第四连接孔。多个扣杆分别依次穿过第四连接孔、第三连接孔、第二连接孔和第一连接孔以将顶扣件、第二电池组、第一电池组和扣接底盘固定在一起。
于本发明的一实施例中，第一PCB板具有多个第一穿孔，第二PCB板具有多个第二穿孔，第三PCB板具有多个第三穿孔，至少一个扣杆依次穿过第四连接孔、第三穿孔、第三连接孔、第二穿孔、第二连接孔、第一穿孔和第一连接孔以将顶扣件、第三PCB板、第二电池组、第二PCB板、第一电池组、第一PCB板和扣接底盘固定在一起。
于本发明的一实施例中，免焊式锂电池组还包括第一线束、第二线束和电池管理模块，第一线束的一端电性连接第一PCB板、第二PCB板以及第三PCB板，第一线束的另外一端电性连接电池管理模块，第二线束电性连接第一电池组和第二电池组，第二线束的另外一端电性连接电池管理模块。
于本发明的一实施例中，顶扣件具有第一卡槽和第二卡槽，第一卡槽固定第一线束的一部分，第二卡槽固定第二线束的一部分
于本发明的一实施例中，第一PCB板、第二PCB板以及第三PCB板均 具有插孔，第一线束的一端具有插头，插头插入到插孔中采集第一PCB板、第二PCB板以及第三PCB板的电压和温度信息。
于本发明的一实施例中，第一电池组和第二电池组均具有夹线结构，夹线结构固定部分的第一线束。
于本发明的一实施例中，第一、第二、第三弹性接触件为簧片结构，第一弹性接触件朝第一PCB板的前侧凸起，第二弹性接触件朝第二PCB板的前侧和后侧凸起，第三弹性接触件朝第三PCB板的后侧凸起。
于本发明的一实施例中，免焊式锂电池组还包括第三电池组和第四PCB板，第四PCB板固定于第一电池组的前侧，第三电池组固定于第四PCB板的前侧，第二PCB板固定于第三电池组的前侧。
于本发明的一实施例中，每个第一弹性接触件、第二弹性接触件或者第三弹性接触件具有六个金属簧片，间隔设置的三个金属簧片向一侧突起。
于本发明的一实施例中，第二PCB板和第三PCB板均具有汇流排，将整个PCB板的电流或电压汇集。
于本发明的一实施例中，多个扣杆是多个长螺栓。
综上所述，本发明通过卡柱和卡孔的配合以及扣杆和连接孔的配合，将多个电池组和PCB板牢牢固定在一起。相对传统焊接方式进行组装，本发明提供的电池组结构组装更加简单，大幅度降低了组装难度，降低了组装成本。并且后期拆分替换单个或者多个电池更加容易，降低了后续的维护成本。特别地，PCB板和电池组之间的电性连接稳定牢靠。
附图说明
图1为本发明第一实施例提出的一种免焊式锂电池组的拆分结构立体示 意图；
图2为本发明第一实施例提出的一种免焊式锂电池组的正视图；
图3为本发明第一实施例提出的一种免焊式锂电池组的后视图；
图4为本发明第一实施例提出的一种免焊式锂电池组的拆分结构俯视图；
图5为本发明第一实施例提出的一种免焊式锂电池组的拆分结构侧视图；
图6为本发明第一实施例提出的一种免焊式锂电池组的扣接底盘的示意图；
图7A-7B为本发明第一实施例提出的一种免焊式锂电池组的第一PCB板两个不同角度的示意图；
图8A-8B为本发明第一实施例提出的一种免焊式电池组的第一电池组两个不同角度的示意图；
图9A-9B为本发明第一实施例提出的一种免焊式锂电池组的第二PCB板两个不同角度的示意图；
图10A-10B为本发明第一实施例提出的一种免焊式锂电池组的第二电池组两个不同角度的示意图；
图11A-11B为本发明第一实施例提出的一种免焊式锂电池组的第三PCB板两个不同角度的示意图；
图12为本发明第一实施例提出的一种免焊式锂电池组的顶扣件另一角度的示意图；
图13为本发明第二实施例提出的一种免焊式锂电池组的拆分结构立体示意图；
图14为本发明第二实施例提出的一种免焊式锂电池组的拆分结构俯视图；
图15为本发明第二实施例提出的一种免焊式锂电池组的拆分结构侧视图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
在本发明的描述中，需要说明的是，术语“前”、“后”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制；术语“第一”、“第二”、“第三”仅用于描述目的，而不能理解为指示或暗示相对重要性，此外，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。
为了描述方便，定义图1中沿着电池组的中轴线(未画出)的左下角方向为前，右上角方向为后。参照图1-12，本发明第一实施例提供的一种免焊式锂电池组，包括扣接底盘1、第一PCB板2、第一电池组3、第二PCB板22、第二电池组5、第三PCB板6、顶扣件7以及多个扣杆10。
扣接底盘1具有多个第一卡柱101和多个第一连接孔103。于第一实施例中，第一卡柱101的数量为二，第一连接孔103的数量为四。然而，本发明对第一卡柱和第一连接孔的数量不作任何限定。于其它实施例中，扣接底盘1可具有四个第一卡柱和六个第一连接孔。于本实施例中，四个第一连接孔103分别位于扣接底盘1靠近四角处，两个第一卡柱101分别位于扣接底盘1的前面的两端。通过这种布置，使得扣接底盘和其它元件固定时的受力分布更加均匀。于本实施例中，第一卡柱为具有四根凸棱的前端小后端大的柱状体。然而，本发明对第一卡柱的具体形状亦不作任何限定，卡柱只要能够和卡孔配合实现卡合定位作用即可。
于第一实施例中，扣接底盘1具有多个加强筋102，加强扣接底盘1的强度，从而提高扣接底盘1的抗曲挠性。
第一PCB板2固定于扣接底盘1的前侧。第一PCB板2具有多个第一卡孔201、多个第一弹性接触件202以及插孔203。多个第一卡孔201与多个第一卡柱101卡合以固定连接第一PCB板2和扣接底盘1。具体而言，第一卡孔201的内径大于第一卡柱101前端的外径但小于第一卡柱101后端的外径，因此当第一卡柱插入第一卡孔后，二者便牢固卡合在一起。
于第一实施例中，第一卡孔201的数量对应于第一卡柱101的数量，均为两个。于本实施例中，第一PCB板2还具有多个第一穿孔204，第一穿孔204的数量少于第一连接孔103的数量，为三个。然而本发明对此不做任何限定，于其它实施例中，第一卡孔201的数量可为四个，第一穿孔的数量可等于第一连接孔的数量。
第一电池组3固定于第一PCB板2的前侧，第一电池组3具有多个第二卡柱301、多个第一电芯302以及多个第二连接孔303。于第一实施例中，第 一电池组3包括外框架，外框架内固定有多个锂电池，这些锂电池形成串联或者并联的连接关系。于第一实施例中，每个第一弹性接触件202具有六个金属簧片，间隔设置的三个金属簧片向第一PCB板2的前侧突起以抵靠在第一电芯302上，从而实现第一PCB板2和第一电池组3的电性接触连接。
于第一实施例中，第二卡柱301的形状和第一卡柱101的形状相同，通过设置相同结构的元件，使得整个电池组和PCB板的制作容易标准化，从而降低制造成本。然而本发明对此不作任何限定。于其它实施例中，第二卡柱301可具有与第一卡柱101不同的形状，只要能够和卡孔配合实现卡合作用即可。
于第一实施例中，第一电池组3还包括两个夹线结构304，当对第一电池组3外部布线时，部分线束可以夹在夹线结构304中得到固定。具体而言，夹线结构304具有两个长短不同的延伸壁，延伸壁中间具有开口以使线束能通过开口进入从而夹持在延伸壁下，如图1所示。然而，本发明对夹线结构304的具体结构不作任何限定。于其它实施例中，夹线结构可为夹子的形状或者凹槽形。
第二PCB板22固定于第一电池组3的前侧，第二PCB板22具有多个第二卡孔222和多个第二弹性接触件223。多个第二卡孔222与多个第二卡柱301卡合以固定连接第二PCB板22和第一电池组3。于本实施例中，第二弹性接触件223具有六个金属簧片，间隔设置的三个金属簧片向第二PCB板22的前侧突起以抵靠在第二电芯502上，另外三个金属簧片向第二PCB板22的后侧突起以抵靠在第一电芯302上。
于第一实施例中，多个第一弹性接触件202与多个第一电芯302的后端紧密接触并且多个第二弹性接触件223与多个第一电芯302的前端紧密接触 从而将多个第一电芯302串联或并联在一起。本实施例提到的前端和后端仅仅是针对沿着图1中所示的电池组的中轴线(未画出)左下角方向为前端，右上角方向为后端，并不代表前端就是正极后端就是负极。如图1所示，第一电芯302的前端为一部分电池的正极和另一部分电池的负极。
于第一实施例中，第二卡孔222的数量对应于第二卡柱301的数量，均为两个。第二PCB板22还具有多个第二穿孔221，第二穿孔221的数量少于第二连接孔303的数量，为三个。然而本发明对此不做任何限定，于其它实施例中，第二卡孔的数量可为四个，第二穿孔的数量可等于第二连接孔的数量。
于第一实施例中，第二PCB板22具有汇流排4，将整个第二PCB板22的电流或电压汇集。第二PCB板电性连接的所有串联或者并联的电池的总的电流或者电压，从汇流排引出。通过设置专门的汇流排4，增强所在区域的过电流能力，防止整个PCB板过热。
第二电池组5固定于第二PCB板22的前侧，第二电池组5具有多个第三连接孔501、多个第二电芯502以及多个第三卡柱503。于第一实施例中，第二电池组5具有和第一电池组3相似的结构，即第二电池组5包括外框架，外框架内固定有多个锂电池，这些锂电池形成串联或者并联的连接关系。
于第一实施例中，第二电池组5也具有至少一个夹线结构。第二电池组5的夹线结构的功能和具体结构和第一电池组的夹线结构的功能和具体结构完全相同，在此不展开赘述。
第三PCB板6固定于第二电池组5的前侧，第三PCB板6具有多个第三卡孔602和多个第三弹性接触件601。多个第三卡孔602与多个第三卡柱503卡合以固定连接第三PCB板6和第二电池组5，多个第二弹性接触件223与 多个第二电芯502的后端紧密接触并且多个第三弹性接触件601与多个第二电芯502的前端紧密接触从而将多个第二电芯502串联或并联在一起。于第一实施例中，每个第三弹性接触件601具有六个金属簧片，间隔设置的三个金属簧片向第三PCB板6的后侧突起以抵靠在第二电芯502上，从而实现第三PCB板6和第二电池组5的电性接触连接。
于本实施例中，第三PCB板6也具有汇流排41，将整个第三PCB板6的电流或电压汇集。然而，本发明对此不做任何限定。于其它实施例中，第一PCB板也可具有汇流排。
顶扣件7固定于第三PCB板6的前侧，顶扣件7具有多个第四连接孔703。于第一实施例中，第四连接孔703、第三连接孔501、第二连接孔303以及第一连接孔103具有相同的尺寸和数量。然而，本发明对此不作任何限定。
多个扣杆10分别依次穿过第四连接孔703、第三连接孔501、第二连接孔303以及第一连接孔103以将顶扣件7、第二电池组5、第一电池组3和扣接底1盘固定在一起。具体而言，扣杆10为长螺栓结构，一端具有外螺纹，另一端具有螺母。第一连接孔103具有内螺纹，将扣杆10的杆体部分依次穿过第四连接孔703、第三连接孔501、第二连接孔303，最终扣杆10具有外螺纹的一端和第一连接孔103的内螺纹固定。扣杆10的另一端通过螺母卡合在第四连接孔703处。然而，本发明对扣杆10的具体结构不作任何限定。
于第一实施例中，由于第一PCB板2具有多个第一穿孔204，第二PCB板22具有多个第二穿孔221，第三PCB板6具有多个第三穿孔603，至少一个扣杆10从前往后依次穿过第四连接孔703、第三穿孔603、第三连接孔501、第二穿孔221、第二连接孔303、第一穿孔201和第一连接孔103以将顶扣件7、第二电池组5、第二PCB板22、第一电池组3、第一PCB板2和扣接底 盘1固定在一起。
于本实施例中，由于穿孔的数量少于连接孔的数量，因此部分扣杆不穿过PCB板而是直接越过PCB板连接各个电池组。PCB板的形状相应地进行让位设计，让扣杆能过越过或穿过PCB板即可。
于第一实施例中，免焊式锂电池组还包括第一线束8、第二线束81和电池管理模块9。第一线束8的一端电性连接第一PCB板2、第二PCB板22以及第三PCB板6，第一线束8的另外一端电性连接电池管理模块9。第二线束81电性连接第一电池组3和第二电池组5，第二线束81的另外一端电性连接电池管理模块9。
具体而言，第一PCB板2、第二PCB板22以及第三PCB板6均具有插孔203，第一线束8的一端具有插头802，插头802插入到插孔中采集第一PCB板2、第二PCB板22以及第三PCB板6的电压和温度信息。第一线束8的另一端具有插头801，插头801插到电池管理模块9的插槽901从而将采集的相应信息传输给电池管理模块9。第二线束81是功率线束，承载较大电流，用于第一电池组3和第二电池组5的输出。
顶扣件7具有第一卡槽701和第二卡槽702，第一卡槽701固定第一线束8的一部分，第二卡槽702固定第二线束81的一部分。通过设置卡槽，固定布线，使得电力或信号传输更加稳定。
综上所述，本实施例提供的免焊式电池组通过在两个端板和每个电池组上均设置连接孔，然后将锁杆依次穿过连接孔从而将各个元件串接组装在一起。PCB板固定在两个电池组之间，或者电池组与两个端板之间，由于整个电池组的固定力是往里的，因此电池组和PCB板之间的电性接触将非常牢靠，实现稳定连续的电力或信号传输。即便电池组在震动环境下使用，电池组和 PCB板之间的电性连接也不会断开。相对传统的焊接固定方式，本实施例的免焊式电池组全部式可拆卸式连接。大幅度降低了组装难度，降低了组装成本。在使用一端时间后，如果个别电池组出现故障，也可以拆分从而替换单个电池组，降低了后续的维护成本。
图13-15所示为本发明第二实施例提供的免焊式锂电池组的拆分结构示意图。第二实施例中免焊式锂电池组的扣接底盘1、第一PCB板2、第一电池组3、第二PCB板22、第二电池组5、第三PCB板6、顶扣件7、第一线束8、第二线束81、线路板9、扣杆10与第一实施例的结构相同。与第一实施例相比，第二实施例具有两个第一电池组和两个第二PCB板。以下为了方便描述，两个第一电池组分别命名为第一电池组3和第三电池组31，两个第二PCB板22分别命名为第二PCB板22和第四PCB板21。定义图13中沿着电池组的中轴线(未画出)的左下角方向为前，右上角方向为后。第四PCB板21固定于第一电池组3的前侧，第三电池组31固定于第四PCB板21的前侧，第二PCB板22固定于第三电池组31的前侧。然而，本发明对此不作任何限定。于其它实施例中，可具有超过3个第一电池组和超过3个第二PCB板。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，尽管参照前述实施例对本发明进行了详细的说明，对于本领域的技术人员来说，其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (11)

  1. 一种免焊式锂电池组，其特征在于，包括：
    扣接底盘，具有多个第一卡柱和多个第一连接孔；
    第一PCB板，固定于所述扣接底盘的前侧，所述第一PCB板具有多个第一卡孔和多个第一弹性接触件，所述多个第一卡孔与所述多个第一卡柱卡合以固定连接所述第一PCB板和所述扣接底盘；
    第一电池组，固定于所述第一PCB板的前侧，所述第一电池组具有多个第二卡柱、多个第一电芯以及多个第二连接孔；
    第二PCB板，固定于所述第一电池组的前侧，所述第二PCB板具有多个第二卡孔和多个第二弹性接触件，所述多个第二卡孔与所述多个第二卡柱卡合以固定连接所述第二PCB板和所述第一电池组，所述多个第一弹性接触件与所述多个第一电芯的后端紧密接触并且所述多个第二弹性接触件与所述多个第一电芯的前端紧密接触从而将多个第一电芯串联或并联在一起；
    第二电池组，固定于所述第二PCB板的前侧，所述第二电池组具有多个第三卡柱、多个第二电芯以及多个第三连接孔；
    第三PCB板，固定于所述第二电池组的前侧，所述第三PCB板具有多个第三卡孔和多个第三弹性接触件，所述多个第三卡孔与所述多个第三卡柱卡合以固定连接所述第三PCB板和所述第二电池组，所述多个第二弹性接触件与所述多个第二电芯的后端紧密接触并且所述多个第三弹性接触件与所述多个第二电芯的前端紧密接触从而将多个第二电芯串联或并联在一起；
    顶扣件，固定于所述第三PCB板的前侧，所述顶扣件具有多个第四连接孔；
    多个扣杆，所述多个扣杆分别依次穿过第四连接孔、第三连接孔、第二连接孔和第一连接孔以将顶扣件、第二电池组、第一电池组和扣接底盘固定 在一起。
  2. 根据权利要求1所述的免焊式锂电池组，其特征在于，所述第一PCB板具有多个第一穿孔，所述第二PCB板具有多个第二穿孔，所述第三PCB板具有多个第三穿孔，至少一个扣杆依次穿过第四连接孔、第三穿孔、第三连接孔、第二穿孔、第二连接孔、第一穿孔和第一连接孔以将顶扣件、第三PCB板、第二电池组、第二PCB板、第一电池组、第一PCB板和扣接底盘固定在一起。
  3. 根据权利要求1所述的免焊式锂电池组，其特征在于，还包括第一线束、第二线束和电池管理模块，所述第一线束的一端电性连接所述第一PCB板、第二PCB板以及第三PCB板，所述第一线束的另外一端电性连接所述电池管理模块，所述第二线束电性连接所述第一电池组和第二电池组，所述第二线束的另外一端电性连接所述电池管理模块。
  4. 根据权利要求3所述的免焊式锂电池组，其特征在于，所述顶扣件具有第一卡槽和第二卡槽，所述第一卡槽固定所述第一线束的一部分，所述第二卡槽固定所述第二线束的一部分。
  5. 根据权利要求3所述的免焊式锂电池组，其特征在于，所述第一PCB板、第二PCB板以及第三PCB板均具有插孔，所述第一线束的一端具有插头，所述插头插入到插孔中采集所述第一PCB板、第二PCB板以及第三PCB板的电压和温度信息。
  6. 根据权利要求3所述的免焊式锂电池组，其特征在于，所述第一电池组和所述第二电池组均具有夹线结构，所述夹线结构固定部分的第一线束。
  7. 根据权利要求1所述的免焊式锂电池组，其特征在于，所述第一、第二、第三弹性接触件为簧片结构，所述第一弹性接触件朝第一PCB板的前侧 凸起，所述第二弹性接触件朝第二PCB板的前侧和后侧凸起，所述第三弹性接触件朝第三PCB板的后侧凸起。
  8. 根据权利要求1所述的免焊式锂电池组，其特征在于，还包括第三电池组和第四PCB板，所述第四PCB板固定于所述第一电池组的前侧，所述第三电池组固定于所述第四PCB板的前侧，所述第二PCB板固定于所述第三电池组的前侧。
  9. 根据权利要求1所述的免焊式锂电池组，其特征在于，每个第一弹性接触件、第二弹性接触件或者第三弹性接触件具有六个金属簧片，间隔设置的三个金属簧片向一侧突起。
  10. 根据权利要求1所述的免焊式锂电池组，其特征在于，所述第二PCB板和所述第三PCB板均具有汇流排，将整个PCB板的电流或电压汇集。
  11. 根据权利要求1所述的免焊式锂电池组，其特征在于，所述多个扣杆是多个长螺栓。
PCT/CN2022/071312 2021-04-07 2022-01-11 一种免焊式锂电池组 WO2022213696A1 (zh)

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