CN117525756A - Busbar welding support and battery pack with same - Google Patents

Busbar welding support and battery pack with same Download PDF

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Publication number
CN117525756A
CN117525756A CN202410012994.2A CN202410012994A CN117525756A CN 117525756 A CN117525756 A CN 117525756A CN 202410012994 A CN202410012994 A CN 202410012994A CN 117525756 A CN117525756 A CN 117525756A
Authority
CN
China
Prior art keywords
bracket
limiting
busbar
connecting wall
support
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202410012994.2A
Other languages
Chinese (zh)
Other versions
CN117525756B (en
Inventor
王广利
陈家鸿
杨卿鑫
刘伶
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Juxin Haiju New Energy Technology Co ltd
Original Assignee
Shanghai Juxin Haiju New Energy Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Juxin Haiju New Energy Technology Co ltd filed Critical Shanghai Juxin Haiju New Energy Technology Co ltd
Priority to CN202410012994.2A priority Critical patent/CN117525756B/en
Publication of CN117525756A publication Critical patent/CN117525756A/en
Application granted granted Critical
Publication of CN117525756B publication Critical patent/CN117525756B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
    • 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
    • H01M50/258—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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/271—Lids or covers for the racks or secondary casings
    • 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
    • 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
    • H01M50/298—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the wiring of battery packs
    • 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
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • 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

Landscapes

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

Abstract

The invention relates to the technical field of energy storage, in particular to a busbar welding bracket and a battery pack with the same. The busbar welding support comprises a first support and a second support which are separated from each other, the first support comprises a first connecting wall, a first middle limiting part, a first side limiting part and a first fixing part, the first middle limiting part is connected with the first connecting wall, the second support comprises a second connecting wall, a second middle limiting part, a second side limiting part and a second fixing part, the second middle limiting part, the first side limiting part, the second middle limiting part and the second middle limiting part form a placing space for placing a busbar, and the first support and the second support are fixed on a battery module in a detachable mode through the first fixing part and the second fixing part respectively. According to the invention, the bus bar welding bracket can be detached after the welding is completed through the detachable structure, and the welding can be realized under the condition that the height of the battery pack is not influenced.

Description

Busbar welding support and battery pack with same
Technical Field
The invention relates to the technical field of energy storage, in particular to a busbar welding bracket and a battery pack with the same.
Background
With the rapid development of electric vehicles and renewable energy technologies, there is an increasing demand for efficient, safe, and environmentally friendly battery packs.
The battery pack generally includes a plurality of battery modules arranged together, and the battery modules generally include upper and lower frames and a plurality of battery cells positioned between the upper and lower frames. The cells are stacked together and connected in series by a bus to meet the energy output requirements of high voltage and high power.
In the manufacturing process of the battery module, the battery cells are stacked together, and then the busbar and the positive and negative poles of the battery cells are welded together, so that the battery cells in the battery module are connected in series. When the busbar is welded, the plastic isolation support is required to be placed on the stacked battery cells, then the busbar is placed in a hole site arranged on the isolation support, and the busbar is precisely aligned with the positive and negative poles and then subjected to laser welding, so that the busbar and the positive and negative poles are welded together. After the welding is completed, the isolation support can remain on the battery module. Because the isolation support has certain thickness, the height of the whole battery pack can be increased, and then the height of a container for containing the battery pack is increased.
In addition, because the isolation support is longer in length and is a plastic product, the edge warping phenomenon is easy to generate, so that the isolation support is difficult to accurately install on a battery module, and the conditions of cold welding, partial welding, welding and frying and the like are caused in the welding of a busbar in the isolation support and positive and negative electrode posts on a battery cell, so that the isolation support is safe in production and use.
Disclosure of Invention
In view of the above, the present invention provides a busbar welding bracket capable of achieving welding without increasing the height of a battery pack, and a battery pack having the same.
The first bracket and the second bracket are made of materials with the hardness being larger than 90HBW, the first bracket comprises a first connecting wall, a first middle limiting part, a first side limiting part and a first fixing part, the second bracket comprises a second connecting wall, a second middle limiting part, a second side limiting part and a second fixing part, the second middle limiting part, the second side limiting part and the second fixing part are connected with the second connecting wall, a placing space for placing a busbar is formed between the first middle limiting part, the first middle limiting part and the first side limiting part, the second middle limiting part and the second side limiting part, the first bracket and the second bracket are respectively fixed on a battery module in a detachable mode through the first fixing part and the second fixing part, and when the first bracket and the second bracket are respectively positioned between the first middle limiting part, the second bracket and the second side limiting part, the first bracket and the second bracket are respectively positioned between the first middle limiting part, the second bracket and the second bracket are respectively positioned between the first middle limiting part and the second bracket, and the second bracket are respectively positioned between the first middle limiting part and the second bracket.
Optionally, the first bracket and the second bracket are made of one of bakelite, modified phenolic resin and metal with plastic wrapped outside.
Optionally, the busbar includes being located the intra-module busbar at battery module middle part and being located the total busbar at battery module edge, place the space including form in between the spacing portion in the first, between the spacing portion in the second, and between the spacing portion in the second with the spacing portion in the second between the spacing portion in the second, and form in the spacing portion in the first with the spacing portion in the first second place the space between the spacing portion in the limit, first place the space be used for placing the intra-module busbar, the second place the space be used for placing the total busbar.
Optionally, a first bottom plate is connected between one side of the first side limiting portion, which is close to the first connecting wall, and a first middle limiting portion, which is close to the first connecting wall, the first bracket and the second bracket further include a first limiting block and a second limiting block, where the first limiting block is located on the first middle limiting portion, the first connecting wall, the second middle limiting portion and the second side limiting portion, and is used for limiting a position, in a direction, of the bus bar in the module, which is close to or far from the first middle limiting portion or the second middle limiting portion, or a position, in a direction, in which the bus bar in the module, which is close to or far from the first connecting wall, is far from the first connecting wall, and the second limiting block is located on the first middle limiting portion, the first side limiting portion, the second middle limiting portion and the second side limiting portion, and is used for limiting a position, in a direction, in which the bus bar in the module, or the bus bar in the module, which is close to or far from the first connecting wall or the second connecting wall, which is far from the second connecting wall.
Optionally, the first stopper includes with the connecting portion that first support or second support links to each other, by the terminal of connecting portion to the direction extension of keeping away from first support or second support, and by the terminal fixture block that extends to the inside of corresponding space of placing of extension.
Optionally, the second limiting block includes an elastic arm connected with the first bracket or the second bracket, and a pressing block extending from the tail end of the elastic arm to a direction away from the first bracket or the second bracket, where the pressing block is pressed and deformed in a direction close to the battery module in a mounting process of the corresponding busbar.
Optionally, a first limiting surface and a third limiting surface are formed on the inner sides of the first connecting wall and the second connecting wall respectively, a first limiting plate is arranged at the edge of the first connecting wall, a second limiting surface is formed on the inner side of the first limiting plate, the first limiting surface and the third limiting surface are used for limiting the position of the bus bar in the module, which is close to or far from the direction of the first connecting wall or the second connecting wall, and the second limiting surface is used for limiting the position of the bus bar, which is close to or far from the direction of the first middle limiting part.
Optionally, the first fixing portion includes a first fixing column disposed at an edge of the first connecting wall and a first through hole disposed in the first fixing column, and the second fixing portion includes a second fixing column disposed at an edge of the second connecting wall and a second through hole disposed in the second fixing column.
The invention also provides a battery pack, which comprises a battery module, a busbar welding bracket arranged on the battery module and a busbar arranged in the busbar welding bracket, wherein the busbar welding bracket is the busbar welding bracket.
The beneficial effects are that:
the busbar welding bracket comprises the first bracket and the second bracket which are mutually separated, so that the two brackets can be detached from the battery module after the welding is finished, the welding can be finished under the condition of not increasing the height of the battery pack, the space occupied by the battery pack and the height of a container for containing the battery pack are reduced, and the container occupies less space and is convenient to transport.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present invention more readily apparent.
The above, as well as additional objectives, advantages, and features of the present invention will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present invention when read in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:
fig. 1 is a perspective view of a battery pack according to a first embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view of a battery pack according to a first embodiment of the present invention.
Fig. 3 is a schematic top view of a battery pack according to a first embodiment of the present invention.
Fig. 4 is an enlarged schematic view of a portion of fig. 3.
Fig. 5 is a perspective view of a busbar welding bracket according to a first embodiment of the present invention.
Fig. 6 is a schematic view of a first bracket and a bus bar according to a first embodiment of the invention.
Fig. 7 is an enlarged schematic view of a portion of fig. 5.
Fig. 8 is a schematic view of a second bracket according to the first embodiment of the present invention.
Fig. 9 is a perspective view of a battery pack according to a second embodiment of the present invention.
Fig. 10 is a perspective view of a busbar welding bracket according to a second embodiment of the present invention.
Reference numerals: 10. a battery module; 11. a battery cell; 20. a busbar welding bracket; 21. a first bracket; 211. a first connecting wall; 211a, a first limiting surface; 212. a first middle limit part; 213. a first side limit part; 214. a first support portion; 214a, first ribs; 215. a first limiting plate; 215a, a second limiting surface; 216. a first fixing portion; 216a, a first fixing column; 216b, a first through hole; 217. a first limiting block; 217a, a first notch; 217b, a connection; 217c, extensions; 217d, clamping blocks; 218. a second limiting block; 218a, a second notch; 218b, a resilient arm; 218c, briquetting; 219. a first base plate; 22. a second bracket; 221. a second connecting wall; 221a, a third limiting surface; 222. a second middle limit part; 223. a second limit part; 224. a second supporting part; 224a, second convex strips; 225. a second limiting plate; 226. a second fixing portion; 226a, a second fixing column; 226b, second through holes; 23. placing space; 231. a first placement space; 232. a second placement space; 30. a busbar; 31. a busbar viewing aperture; 32. a bus bar in the module; 33. a total bus; 331. a step surface.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
First embodiment
As shown in fig. 1 to 4, the battery pack provided by the embodiment of the invention includes a plurality of battery modules 10 and a plurality of bus bar welding brackets 20 (only one battery module 10 and one bus bar welding bracket 20 are shown in the drawings). The battery module 10 includes a plurality of battery cells 11 stacked together, and the busbar welding bracket 20 is detachably fixed above the battery module 10, so that the placing space 23 arranged on the busbar welding bracket 20 is utilized to limit the busbar 30, so that the busbar observation hole 31 arranged on the busbar 30 is aligned with the battery cell observation hole on the battery module 10, and the busbar 30 and the positive and negative poles of the battery cells 11 are conveniently welded together, thereby realizing the series connection of the plurality of battery cells 11. When the welding of the bus bar 30 is completed, the bus bar welding bracket 20 can be detached from the battery module 10 without affecting the height of the battery pack.
It should be noted that the busbar welding bracket 20 is applicable to all single-row modules stacked by square aluminum-shell cells, and the cells may be all capacity cells in the market. In the present invention, the battery module 10 and the bus bar welding bracket 20 may be in a one-to-one or one-to-many manner. That is, one bus bar welding holder 20 is provided to each battery module 10, or one bus bar welding holder 20 is shared by a plurality of battery modules 10, or a plurality of bus bar welding holders 20 are provided to one battery module 10. In this embodiment, the battery modules 10 and the busbar welding brackets 20 are in a one-to-one correspondence.
Referring to fig. 5, the busbar welding bracket 20 includes a first bracket 21 and a second bracket 22, wherein the first bracket 21 and the second bracket 22 are respectively fixed at two sides of the battery module 10, and the length direction of the first bracket is the same as the stacking direction of the battery cells 11 in the battery module 10. When the first bracket 21 and the second bracket 22 are fixed on the battery module 10, the first bracket 21 and the second bracket 22 are spliced together, and the corresponding ends thereof are attached to each other, thereby forming a complete busbar welding bracket 20. The outer contour of the bus bar welding bracket 20 is substantially the same as that of the corresponding battery module 10, so that the bus bar welding bracket 20 can be accurately fixed to the battery module 10.
The first and second brackets 21, 22 are made of an insulating hard (hardness > 90 HBW) material, such as one of bakelite, modified phenolic resin, other plastics with similar properties. In other embodiments of the present invention, the bus bar welding bracket 20 may also be manufactured by wrapping plastic around metal. If the busbar welding bracket 20 is manufactured by wrapping plastic outside metal, the strength requirement on the plastic can be properly lowered, so long as the overall hardness of the metal and plastic shell is ensured to be more than 90 HBW.
Referring to fig. 6, the first bracket 21 includes a first connecting wall 211 extending along the stacking direction of the cells 11, and a first middle limiting portion 212, a first side limiting portion 213 and a first supporting portion 214 connected to the first connecting wall 211. The first connecting wall 211 is used for being attached to a side edge of the battery module 10, and the first middle limiting portion 212, the first side limiting portion 213 and the first supporting portion 214 extend from different positions of the first connecting wall 211 to the inside of the battery module 10 along a direction perpendicular to the first connecting wall 211. Specifically, the first middle limiting part 212 and the first supporting part 214 extend horizontally inward from the middle of the first connection wall 211, the first side limiting part 213 extends horizontally inward from both ends of the first connection wall 211, and a first bottom plate 219 extending horizontally is connected between one side of the first side limiting part 213 near the first connection wall 211 and the first middle limiting part 212 near it.
A placement space 23 for placing the bus bar 30 is formed between adjacent first intermediate limiting portions 212, and between the first intermediate limiting portions 212 and the first side limiting portions 213. Specifically, the bus bar 30 includes an intra-module bus bar 32 located at the middle of the battery module 10, and a total bus bar 33 located at the edge of the battery module 10 for connecting the battery module 10 with external power lines. The placement space 23 includes a first placement space 231 formed between adjacent first intermediate limiting portions 212, and a second placement space 232 formed between the first intermediate limiting portions 212 and the first side limiting portions 213. The first placing space 231 is used for placing the in-module bus bar 32, and the second placing space 232 is used for placing the total bus bar 33. The first supporting portions 214 are located between the first middle limiting portions 212 and are used for supporting the long in-module bus bars 32. The first protrusion 214a extending along the length direction is formed at the middle of the first support 214, and the shape of the first protrusion 214a is matched with the shape of the recess formed by punching the middle of the in-module bus bar 32, so that the first protrusion 214a can extend into the recess in the middle of the in-module bus bar 32, the in-module bus bar 32 can be accurately positioned when being placed in the first placing space 231, and the first bracket 21 plays a guiding role when being pulled out from the battery module 10 after welding is completed, so that the first bracket 21 can be detached more conveniently. In addition, the first supporting portion 214 can also function to support the in-module bus bar 32, so as to prevent the in-module bus bar 32 from being deformed due to a large length, resulting in inaccurate welding.
The first connection wall 211 protrudes inward at a portion between the first middle limiting portions 212, and a first limiting surface 211a is formed at an inner side of the first connection wall 211. The first limit portion 213 is formed with a first limit plate 215 perpendicular to the first limit portion 213 and the first connecting wall 211, a second limit surface 215a is formed on the inner side of the first limit plate 215, a first fixing portion 216 is formed at a connection position of the first limit plate 215 and the first connecting wall 211, and the first fixing portion 216 includes a first fixing column 216a and a first through hole 216b provided in the first fixing column 216 a. The first bracket 21 can be fixed to the battery module 10 by screws screwed into the first fixing parts 216. In the embodiment of the present invention, the first through hole 216b may be a circular hole or an oblong hole. When the first through hole 216b is a oblong hole, the adaptability between the first bracket 21 and the battery module 10 can be increased, so that the first bracket 21 can be fixed to the battery module 10 even when there is a processing error between the first bracket 21 and the battery module 10. When the first through hole 216b is a circular hole, the processing accuracy requirements for the first bracket 21 and the battery module 10 are high.
Referring to fig. 7, a first limiting block 217 is formed on the first middle limiting portion 212 and the first bottom plate 219, a second limiting block 218 is formed on the first middle limiting portion 212 and the first side limiting portion 213, the first limiting block 217 and the second limiting block 218 cooperate in the first placing space 231 to define a position of the bus bar 32 in the module, and the second limiting surface 215a cooperates with the first limiting block 217 and the second limiting block 218 in the second placing space 232 to define a position of the bus bar 33.
Specifically, the first bottom plate 219 and the first side limiting portion 213 are respectively provided with a first notch 217a and a second notch 218a on the side corresponding to the second placing space 232, the first middle limiting portion 212 is also provided with a first notch 217a and a second notch 218a on the side corresponding to the first placing space 231, and the first limiting block 217 and the second limiting block 218 extend from the first notch 217a and the second notch 218a respectively. The first stopper 217 includes a connection portion 217b connected to the first middle limiting portion 212 or the first bottom plate 219 and being flush with the first middle limiting portion 212 or the first bottom plate 219 in a horizontal direction, an extension portion 217c extending from a distal end of the connection portion 217b along the vertical connection portion 217b and in a direction away from the first middle limiting portion 212 or the first bottom plate 219, and a latch 217d extending toward the first placing space 231 or the second placing space 232 at a distal end of the extension portion 217 c. The surface of the extension portion 217c near the first placing space 231 or the second placing space 232 is recessed inward relative to the surface of the first middle limiting portion 212 or the first bottom plate 219 near the first placing space 231 or the second placing space 232, so that the in-module bus bar 32 or the total bus bar 33 can be placed on the upper surface of the first middle limiting portion 212 or the first bottom plate 219. The distance between the lower surface of the latch 217d and the upper surface of the first middle limiting portion 212 or the first bottom plate 219 is equal to the thickness of the in-module bus bar 32 or the total bus bar 33, so as to ensure the position stability of the in-module bus bar 32 or the total bus bar 33 in the corresponding placement space 23. The second stopper 218 is a finger extending from the edge of the first middle stopper 212 or the first side stopper 213 toward the inside of the corresponding placement space 23, and includes an elastic arm 218b perpendicular to the corresponding edge of the first middle stopper 212 or the first side stopper 213, and a pressing block 218c extending from the end of the elastic arm 218b in a direction away from the first middle stopper 212 or the first side stopper 213. When the bus bar 30 needs to be placed, the second limiting block 218 can be pressed in the direction close to the battery module 10 along the vertical direction, so that the bus bar 30 can be conveniently pushed into the corresponding placement space 23 along the horizontal direction. The bus bar 33 is provided with a step surface 331, and the step surface 331 is capable of engaging with the outer surface of the first side limiting portion 213 to limit the position of the bus bar 33 in the longitudinal direction of the first bracket 21, and prevent the bus bar from sliding into the second placement space 232.
Referring to fig. 3, 6 and 8, the second bracket 22 has a structure substantially similar to that of the first bracket 21, and includes a second connecting wall 221, a second middle limiting portion 222, a second side limiting portion 223 and a second supporting portion 224. The difference between them is that the number and positions of the second supporting parts 224 on the second bracket 22 are different from those of the first supporting parts 214 on the first bracket 21, three first supporting parts 214 are provided on the first bracket 21, four second supporting parts 224 are provided on the second bracket 22, the positions of the four second supporting parts 224 are staggered from the positions of the three first supporting parts 214 on the first bracket 21 along the length direction of the busbar welding bracket 20, correspondingly, only a first placing space 231 for placing the intra-module busbar 32 is provided on the second bracket 22, the first placing space 231 is formed between the second side limiting part 223 and the second middle limiting part 222 and between the second middle limiting parts 222, and the positions of the first limiting parts 217 in the second bracket 22 are also different from those in the first bracket 21. In the second bracket 22, the first stopper 217 is located on the second middle stopper 222 and the second side stopper 223, and in the first bracket 21, the first stopper 217 is located on the first middle stopper 212 and the first bottom plate 219.
Specifically, the second holder 22 includes a second connection wall 221 extending in the stacking direction of the cells 11, and a second middle limit portion 222, a second side limit portion 223, and a second support portion 224 connected to the second connection wall 221. The second connecting wall 221 is used for being attached to the other side of the battery module 10, and the second middle limiting portion 222, the second side limiting portion 223 and the second supporting portion 224 extend from different positions of the second connecting wall 221 toward the inside of the battery module 10 along a direction perpendicular to the second connecting wall 221. Specifically, the second middle limiting portion 222 and the second supporting portion 224 extend horizontally inward from the middle of the second connection wall 221, and the second side limiting portion 223 extends horizontally inward from both ends of the second connection wall 221.
A first placing space 231 for placing the intra-module bus bar 32 is formed between the adjacent second middle limiting portions 222 and between the second middle limiting portions 222 and the second side limiting portions 223. The second supporting portions 224 are located between the second middle limiting portions 222 and the second side limiting portions 223, and are used for supporting the long-length in-module bus bars 32. The second protrusion 224a extending along the length direction is formed at the middle of the second supporting portion 224, and the shape of the second protrusion 224a is matched with the shape of the recess formed by punching the middle of the in-module bus bar 32, so that the second protrusion 224a can extend into the recess of the in-module bus bar 32, the in-module bus bar 32 can be accurately positioned when being placed in the first placing space 231, and the second bracket 22 plays a guiding role when being pulled out from the battery module 10 after welding is completed, so that the second bracket 22 can be detached more conveniently. In addition, the second supporting portion 224 can also play a role in supporting the in-module bus bar 32, so as to prevent the in-module bus bar 32 from being deformed due to a large length, and thus, inaccurate welding is prevented.
The second connection walls 221 are protruded inward at portions between the second middle limiting portions 222 and the second side limiting portions 223, and a third limiting surface 221a is formed at an inner side of the second connection walls 221. The second limit portion 223 is formed with a second limit plate 225 perpendicular to the second limit portion 223 and the second connecting wall 221, and a second fixing portion 226 is formed at a connection position of the second limit plate 225 and the second connecting wall 221, and the second fixing portion 226 includes a second fixing post 226a and a second through hole 226b provided in the second fixing post 226 a. The second holder 22 can be fixed to the battery module 10 by screws screwed into the second fixing parts 226. In the embodiment of the present invention, the second through hole 226b may be a circular hole or an oblong hole. When the second through hole 226b is a oblong hole, the adaptability between the second bracket 22 and the battery module 10 can be increased, so that the second bracket 22 can be fixed to the battery module 10 even if there is a processing error between the second bracket 22 and the battery module 10. When the second through hole 226b is a circular hole, the machining accuracy requirements for the second bracket 22 and the battery module 10 are high.
The first limiting block 217 and the second limiting block 218 are formed on the second middle limiting portion 222 and the second side limiting portion 223, and the first limiting block 217 and the second limiting block 218 are matched with the third limiting surface 221a, so that the position of the bus bar 32 in the module can be limited, and the bus bar 32 in the module is prevented from shaking in the first placing space 231.
Specifically, the second middle limiting portion 222 and the second side limiting portion 223 are provided with a first notch 217a and a second notch 218a corresponding to the side edge of the first placing space 231, the first limiting portion 217 and the second limiting portion 218 extend from the first notch 217a and the second notch 218a, respectively, the first limiting portion 217 is used for limiting the position of the bus bar 32 in the module in a direction approaching or separating from the second middle limiting portion 222, and the second limiting portion 218 is used for limiting the position of the bus bar 32 in the module in a direction approaching or separating from the second connecting wall 221. The first stopper 217 includes a connection portion 217b connected to the second middle stopper 222 or the second side stopper 223 and flush with the second middle stopper 222 or the second side stopper 223 in the horizontal direction, an extension portion 217c extending from the end of the connection portion 217b along the vertical connection portion 217b and in a direction away from the second middle stopper 222 or the second side stopper 223, and a clip 217d extending toward the first placement space 231 at the end of the extension portion 217 c. The surface of the extension portion 217c near the first placing space 231 is recessed inward relative to the surface of the second middle limiting portion 222 or the second side limiting portion 223 near the first placing space 231, so that the in-module bus bar 32 can be placed on the upper surface of the second middle limiting portion 222 or the second side limiting portion 223. The distance between the lower surface of the clamping block 217d and the upper surface of the second middle limiting portion 222 or the second side limiting portion 223 is equal to the thickness of the in-module bus bar 32, so as to ensure the position stability of the in-module bus bar 32 in the first placing space 231. The second limiting block 218 is finger-shaped, and extends from the edge of the second middle limiting portion 222 or the second side limiting portion 223 to the inner side of the first placing space 231, and includes an elastic arm 218b perpendicular to the corresponding edge of the second middle limiting portion 222 or the second side limiting portion 223, and a pressing block 218c extending from the end of the elastic arm 218b in a direction away from the second middle limiting portion 222 or the second side limiting portion 223, wherein a distance between an inner surface of the pressing block 218c and the third limiting surface 221a is equal to the width of the in-module busbar 32, so as to prevent the in-module busbar 32 from shaking in the first placing space 231 after being placed in the first placing space 231. When the bus bar 30 needs to be placed, the second limiting block 218 can be pressed in the vertical direction towards the direction close to the battery module 10, so that the bus bar 32 in the module can be pushed into the first placing space 231 along the horizontal direction.
According to the design of the bus bar welding bracket 20, after the bus bar welding bracket 20 is fixed on the battery module 10 and the bus bar 32 and the bus bar 33 in the module are placed in the first placing space 231 and the second placing space 232, the bus bar welding bracket 20 has high matching degree with the appearance of the battery module 10, and the bus bar welding bracket 20 is not easy to deform, so that the bus bar observation holes 31 arranged on the bus bar 32 and the bus bar 33 in the module can be aligned with the battery cell observation holes arranged on the battery cell 11, thereby being convenient for accurately welding the bus bar 30 and the battery cell 11 together, realizing the series connection between the battery cells 11, reducing various welding defects caused by inaccurate positioning due to accurate positioning of the bus bar 30, and improving the safety performance of products. Further, since the busbar welding bracket 20 of the present invention includes the first bracket 21 and the second bracket 22 which are separated from each other, the two brackets can be detached from the battery module after the welding is completed, the welding can be completed without increasing the height of the battery pack, the space occupied by the battery pack and the height of the container for accommodating the battery pack are reduced, and the container occupies less space and is convenient to transport.
Second embodiment
Fig. 9 is a perspective view of a battery pack according to a second embodiment of the present invention. Fig. 10 is a schematic perspective view of a busbar welding bracket 20 according to a second embodiment of the present invention. As shown in fig. 9 and 10, the battery pack and busbar welding bracket 20 according to the second embodiment of the present invention is substantially the same as the first embodiment, except that the first and second support portions 214 and 224 in the second embodiment are not provided with the first and second protrusions 214a and 224a, and the first and second support portions 214 and 224 can function to support the intra-module busbar 32, thereby preventing the intra-module busbar 32 from being deformed due to a large length and causing inaccurate welding.
By now it should be appreciated by those skilled in the art that while exemplary embodiments of the invention have been shown and described in detail herein, many other variations or modifications that are consistent with the principles of the invention may be directly ascertained or derived from the teachings of the present disclosure without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims (9)

1. A busbar welding bracket, comprising: a first bracket (21) and a second bracket (22) which are separated from each other, wherein the first bracket (21) and the second bracket (22) are made of materials which are insulated and have a hardness of more than 90HBW, the first bracket (21) comprises a first connecting wall (211), a first middle limiting part (212), a first side limiting part (213) and a first fixing part (216) which are connected with the first connecting wall (211), the second bracket (22) comprises a second connecting wall (221), a second middle limiting part (222), a second side limiting part (223) and a second fixing part (226) which are connected with the second connecting wall (221), a space (23) for placing a busbar (30) is formed between the first middle limiting part (212) and the first side limiting part (213), between the second middle limiting part (222) and the second side limiting part (223), the first bracket (21) and the second bracket (22) can be fixed on the first bracket (22) and the second bracket (22) respectively by detaching from the first bracket (214) and the second fixing part (226), the first support part (214) and the first middle limit part (212) are located in the middle of the first support (21), the first support part (214) is located between the first middle limit part (212), the second support part (224) and the second middle limit part (222) are located in the middle of the second support (22), the second support part (224) is located between the second middle limit part (222) and the second side limit part (223), the first side limit part (213) and the second side limit part (223) are located at the edges of the first support (21) and the second support (22) respectively, and when the first support (21) and the second support (22) are spliced together, the first support part (214) and the second support part (224) are staggered.
2. The busbar welding bracket of claim 1, wherein: the first bracket (21) and the second bracket (22) are made of one of bakelite, modified phenolic resin and metal with plastic wrapped outside.
3. The busbar welding bracket of claim 1, wherein: the busbar (30) comprises an intra-module busbar (32) located in the middle of the battery module (10) and a total busbar (33) located at the edge of the battery module (10), the placement space (23) comprises a first placement space (231) formed between the first middle limiting parts (212), between the second middle limiting parts (222) and between the second side limiting parts (223), and a second placement space (232) formed between the first middle limiting parts (212) and the first side limiting parts (213), the first placement space (231) is used for placing the intra-module busbar (32), and the second placement space (232) is used for placing the total busbar (33).
4. The busbar welding bracket of claim 3, wherein: a first bottom plate (219) is connected between one side of the first side limiting part (213) close to the first connecting wall (211) and a first middle limiting part (212) close to the first side limiting part, the first bracket (21) and the second bracket (22) further comprise a first limiting block (217) and a second limiting block (218), the first limiting block (217) is located on the first middle limiting part (212), the first bottom plate (219), the second middle limiting part (222) and the second side limiting part (223) and is used for limiting the position of the direction of the bus bar (32) close to or far from the first middle limiting part (212) or the second middle limiting part (222) or the position of the bus bar (33) close to or far from the first connecting wall (211), and the second limiting block (218) is located on the first middle limiting part (212), the second side limiting part (213), the second middle limiting part (222) and the position of the bus bar (33) close to or far from the first connecting wall (211) or the position of the bus bar (33) close to or the second connecting wall (211).
5. The busbar welding bracket of claim 4, wherein: the first limiting block (217) comprises a connecting part (217 b) connected with the first bracket (21) or the second bracket (22), an extending part (217 c) extending from the tail end of the connecting part (217 b) to the direction far away from the first bracket (21) or the second bracket (22), and a clamping block (217 d) extending from the tail end of the extending part (217 c) to the corresponding placement space.
6. The busbar welding bracket of claim 4, wherein: the second limiting block (218) comprises an elastic arm (218 b) connected with the first bracket (21) or the second bracket (22) and a pressing block (218 c) extending from the tail end of the elastic arm (218 b) to the direction away from the first bracket (21) or the second bracket (22), wherein the pressing block (218 c) is pressed and deformed to the direction close to the battery module (10) in the installation process of the corresponding busbar.
7. The busbar welding bracket of claim 3, wherein: the inner sides of the first connecting wall (211) and the second connecting wall (221) are respectively provided with a first limiting surface (211 a) and a third limiting surface (221 a), the edge of the first connecting wall (211) is provided with a first limiting plate (215), the inner side of the first limiting plate (215) is provided with a second limiting surface (215 a), the first limiting surface (211 a) and the third limiting surface (221 a) are used for limiting the position of the direction of the bus bar (32) in the module, which is close to or far from the first connecting wall (211) or the second connecting wall (221), and the second limiting surface (215 a) is used for limiting the position of the bus bar (33) in the direction of the first middle limiting part (212).
8. The busbar welding bracket of claim 1, wherein: the first fixing portion (216) comprises a first fixing column (216 a) arranged at the edge of the first connecting wall (211) and a first through hole (216 b) arranged in the first fixing column (216 a), and the second fixing portion (226) comprises a second fixing column (226 a) arranged at the edge of the second connecting wall (221) and a second through hole (226 b) arranged in the second fixing column (226 a).
9. The utility model provides a battery package, includes battery module (10), locates busbar welding support (20) on battery module (10), and locates busbar (30) in busbar welding support (20), its characterized in that: the busbar welding bracket (20) is the busbar welding bracket of any one of claims 1 to 8.
CN202410012994.2A 2024-01-04 2024-01-04 Busbar welding support and battery pack with same Active CN117525756B (en)

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* Cited by examiner, † Cited by third party
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CN209571459U (en) * 2019-03-29 2019-11-01 潍柴动力股份有限公司 A kind of pre-installation bracket
WO2021072726A1 (en) * 2019-10-18 2021-04-22 淄博火炬能源有限责任公司 Lithium ion battery module for electric forklift truck, and power supply box
CN214336852U (en) * 2021-03-26 2021-10-01 蜂巢能源科技有限公司 Busbar support and battery module
CN218182418U (en) * 2022-08-17 2022-12-30 珠海冠宇动力电源有限公司 Battery with a battery cell
CN219457916U (en) * 2023-03-30 2023-08-01 惠州亿纬锂能股份有限公司 Insulating support and battery module
CN219591605U (en) * 2023-05-22 2023-08-25 惠州亿纬锂能股份有限公司 CCS assembly and battery module
CN220138649U (en) * 2023-04-19 2023-12-05 惠州亿纬锂能股份有限公司 CCS assembly and battery module

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN209571459U (en) * 2019-03-29 2019-11-01 潍柴动力股份有限公司 A kind of pre-installation bracket
WO2021072726A1 (en) * 2019-10-18 2021-04-22 淄博火炬能源有限责任公司 Lithium ion battery module for electric forklift truck, and power supply box
CN214336852U (en) * 2021-03-26 2021-10-01 蜂巢能源科技有限公司 Busbar support and battery module
CN218182418U (en) * 2022-08-17 2022-12-30 珠海冠宇动力电源有限公司 Battery with a battery cell
CN219457916U (en) * 2023-03-30 2023-08-01 惠州亿纬锂能股份有限公司 Insulating support and battery module
CN220138649U (en) * 2023-04-19 2023-12-05 惠州亿纬锂能股份有限公司 CCS assembly and battery module
CN219591605U (en) * 2023-05-22 2023-08-25 惠州亿纬锂能股份有限公司 CCS assembly and battery module

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