CN112803122B - Battery module with locking mechanism, array type large module, battery pack and power supply - Google Patents
Battery module with locking mechanism, array type large module, battery pack and power supply Download PDFInfo
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- CN112803122B CN112803122B CN202110129489.2A CN202110129489A CN112803122B CN 112803122 B CN112803122 B CN 112803122B CN 202110129489 A CN202110129489 A CN 202110129489A CN 112803122 B CN112803122 B CN 112803122B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The battery module is provided with batteries which are arranged in the same direction. The strip-shaped top pole bus bars are connected with all the battery top poles in parallel in a non-heat way through conductors and cold welding technology. A locking mechanism is arranged between the tops of the adjacent batteries. The locking mechanism is formed into a convex structure with water-drop-shaped bending holes by downwards turning back the top pole bus bars between the tops of the adjacent batteries. The male structure is captured between the neck recesses of adjacent cell cases and is filled with a cured material after opening the bend Kong Zhang to tighten the upper two-sided bus bars and maintain tightening force. The invention realizes the continuous compression of the top pole bus bar to the top pole of the battery and the continuous compression between the batteries through the top locking mechanism, thereby improving the reliability of the cold welding parallel electric connection of the top pole of the battery and stabilizing the structure of the parallel module.
Description
Technical Field
The invention relates to the technical field of battery module thermal management, in particular to a battery module with a locking mechanism, an array type large module, a battery pack and a power supply.
Background
The battery modules with high electric capacity are formed by connecting batteries in parallel, and the battery modules with high voltage are formed by connecting the battery modules in series, so that the method is a common method for packaging the energy storage unit of the electric vehicle. The parallel connection of the positive electrode posts of the vehicle gauge cylindrical battery is usually carried out by adopting a hot welding process of ultrasonic aluminum wire welding and spot welding. Because 1, the structure integration is realized between the battery anode and the cathode shell through the compression joint of elastic insulating materials, the vibration characteristic of ultrasonic aluminum wire welding often causes unreliable anode hot welding; 2. the positive spot welding is only capable of spot-by-spot welding due to high instant power, so that the packaging efficiency of the module is low; 3. the spot welding and the ultrasonic welding are both heat welding processes of metal welding, the hidden danger of damage to the internal quality of the battery caused by high heat can not be detected on line, and the hidden danger is one of main causes of the combustion explosion of the whole vehicle in the future; 4. the thermal welding causes permanent physical change on the surface of the battery, the process of disassembling the module into the monomer is difficult, the quality of the disassembled monomer is greatly influenced, and the echelon utilization of the monomer is not facilitated; 5. the aluminum wire added by the aluminum wire welding belongs to an overcurrent fuse, a certain resistance value is designed, and the battery can generate certain heat in a normal working state, so that the overall heat management of the module is not facilitated. These are common problems in the subdivision industry and need to be improved.
Disclosure of Invention
The invention aims to provide a universal standard bar type busbar with low cost, which is used for locking adjacent batteries in a battery module by using deformation of the busbar and generating downward pressure for compacting the busbar and a battery pole, so that 1, no-heat adhesive cold welding can be adopted between the busbar and a top pole; 2. the contact resistance of the cold welding spot can be reduced by the downward pressure, and the effect of hot welding is achieved; 3. the heat injury of the heat welding to the battery can be avoided, and the quality of the heat welding is superior to that of the heat welding; 4. a high-power low-temperature thermal fuse can be additionally arranged between the busbar and the top pole, and the effect of the high-power low-temperature thermal fuse is better than that of an electric fuse; 5. the problem of unreliable electrical connection of the top pole is solved; 6. the parallel connection of the top polar posts can be automatically and simultaneously operated, so that the production efficiency is greatly improved; 7. the structural reliability of the cold welding module is not lower than that of the hot welding module.
The invention adopts the technical proposal for solving the technical problems that:
the battery module with the top locking mechanism comprises a plurality of cylindrical batteries which are arranged in a row in the same direction and the locking mechanism arranged between the tops of the adjacent batteries. The locking mechanism is a strip-shaped top pole busbar arranged between the tops of adjacent batteries. The top post bus forms an expanding structure by turning back downwards. And the top poles of the batteries are connected in parallel through top pole bus bars and conductors. The conductor is a third electrical conductor or a body extension of the top post buss. The expanding mouth structure is clamped between neck notches of adjacent battery shells and is used for tightening top pole buses on two sides above through filling solidified matters or curable structural adhesive after expanding so as to keep tightening force and prevent retraction.
Further, the expanding opening structure is a water drop-shaped, round, elliptic, square or triangular bending structure; an insulating layer is arranged among the shoulder shell of the battery, which is positioned in the non-top pole area of the top, the side surface of the shell and the neck notch area.
Further, the external extending parts at two ends of the locking mechanism are external wires, the external wires are external poles of poles at the top of the module, and the external poles are the extending parts of the locking mechanism body or the extending parts of the conductors after being reliably and electrically connected with the two ends of the locking mechanism.
Further, the bottom outer side of the third conductor is coated with normal temperature curing structural adhesive, or the inner side of the third conductor is coated with conductive adhesive, the third conductor is one of a metal conductor and a nonmetal conductor, the bottom outer side of the third conductor is coated with normal temperature curing structural adhesive, the inner side of the third conductor is coated with conductive adhesive, the conductive composite is locked and attached with the electric connection state between the top pole busbar and the top pole through normal temperature curing of the normal temperature curing structural adhesive or the conductive adhesive, and the third conductor is electrically connected in a welding, riveting, crimping or conductive adhesive bonding mode, so that reliable electric connection and structural connection with the top pole busbar are realized; the upper surface of the third conductor is higher than the shoulder plane of the battery, the top pole busbar forms a downward bent arc shape above the top pole, and after the expansion port structures at the two ends are expanded, the top pole busbar compresses the third conductor, the top pole and the shoulder top of the adjacent battery, and after the shoulder top compression part of the adjacent battery is locked by normal-temperature curing structural adhesive, the top pole busbar keeps compression force.
Further, the third conductor is a low-melting-point metal conductor or an alloy conductor; the melting point range of the low-melting-point metal conductor or the alloy conductor is 35-70 ℃; the third conductor is provided on the surface of the top post bus bar in advance.
Further, the low-melting-point metal conductor or alloy conductor is electrically and structurally connected with the busbar in an electric connection mode of cold welding connection, crimping, riveting or surface coating shaping, and the low-melting-point metal conductor or alloy conductor is connected with the top pole of the battery through normal-temperature solidified conductive adhesive or normal-temperature solidified structural adhesive; the low-melting-point metal conductor or the alloy conductor is of a columnar structure, and the height of the columnar structure is larger than the height difference between the upper end of the battery shoulder and the plane of the top pole; the sectional area of the columnar structure is larger than or equal to the electric flux area required by the upper limit of the battery overcurrent; the housing portions of the cell housing facing the top post region are each coated with an impermeable insulating layer.
Further, the third conductor is an independent bending conductive sheet, the bending conductive sheet is an L-shaped, U-shaped or S-shaped bending conductive sheet, or an arc-like bending conductive sheet at the upper end of the bottom part horizontally, the upper end of the independent bending conductive sheet is connected with the top pole busbar in a direct electric connection mode of welding, riveting and crimping or in an indirect electric connection mode of conductive adhesive bonding, and the lower end of the bending conductive sheet is elastically pressed on the top pole of the battery in a deformation elastic compression mode and is electrically connected with the top pole of the battery in a mode of conductive adhesive bonding at normal temperature or peripheral bonding of normal temperature curing structural adhesive.
Further, the body extension part of the top pole busbar is a downward notching bump on the central position of the top pole busbar opposite to the top pole busbar, the notching bump has certain elasticity, after the two ends of the top pole busbar are locked, the notching bump forms the downward pressure on the top pole, the notching bump is kept to be bonded with the surface of the top pole and is solidified through normal-temperature solidification conductive adhesive, and the electrical connection between the notching bump and the top pole is locked so as to improve the vibration reliability.
Further, the height of the upper surface of the battery top pole is lower than or equal to the height of the battery shoulder, the top pole busbar is bent downwards to pass through the through hole of the pole cap to form an upward bent arc shape, the contact point of the top pole busbar and the battery top pole is electrically connected through curing conductive adhesive, and the top pole busbar and the shoulders on two sides of the battery top pole are fixed through adhesive to keep tension.
Further, the parallel array type large module comprises a plurality of battery modules, wherein the adjacent battery modules are arranged in a matrix, diamond or staggered and complementary mode which are overlapped in the same direction, top electrode post bus bars of the adjacent battery modules are electrically connected with each other, and shell electrode post bus bars of all batteries can be sequentially connected with each other through the same bus bar to form the parallel connection of the shell electrode posts.
A battery pack comprising a parallel array type large module as described above.
A power supply comprising a battery pack as described above.
The invention has the advantages that: the positive electrodes of the cylindrical battery modules are connected in parallel by reliable electric connection with non-heat welding property, so that the production takt bottleneck of a heat welding electric connection mode is broken, the production takt can be increased by an order of magnitude, and a process foundation is laid for arranging a low-temperature thermal fusing isolation device at the positive electrode; the advantages of structural stability, welding spot shock resistance and the like of a heat welding process of the busbar are maintained, and the problems of hidden quality hazards such as cold welding, false welding and the like of the heat welding process can be thoroughly eliminated; the process method is beneficial to realizing the encapsulation of the bracket-free module, and can directly reduce the encapsulation cost; the structure among all batteries in the module is locked in a hole expansion mode while high electric flux and high consistency of the welding spots of the anodes of all batteries connected in parallel in the battery module are realized, and the module structure is simple and reliable and is easy to realize automatically; the standard bar-shaped top pole bus bar can realize the structure fixation of the battery in a row and the parallel connection of the positive poles, and can realize the parallel connection with the positive poles of all the batteries in the same direction in the battery module by extension, thereby being beneficial to replacing the customized bus bar with high cost and further reducing the packaging cost.
Definitions and general terms
Single-row module: a plurality of batteries are arranged in a row and are connected in parallel.
Big module: the single-row modules are horizontally overlapped in the same direction to form a parallel structure with matrix arrangement, diamond arrangement or staggered complementary arrangement. The horizontal homodromous superposition direction of the plurality of single-row modules is perpendicular to the axial direction of the battery.
Drawings
Fig. 1 is a schematic view of a battery module with a top locking mechanism according to embodiment 1 of the present invention.
Fig. 2 is a front view of a battery module having a top locking mechanism provided in embodiment 1 of the present invention.
Fig. 3 is a partially enlarged structural schematic view of the battery module having the top locking mechanism of fig. 2 at a.
Fig. 4 is a diagram showing a force analysis between the top pole bus bar and the battery when the battery module with the top locking mechanism of embodiment 1 of the present invention has the third conductor.
Fig. 5 is a partially enlarged schematic view of the battery module with the top locking mechanism at the corresponding a according to embodiment 2 of the present invention.
Fig. 6 is a partially enlarged schematic construction view of a battery module having a top locking mechanism according to embodiment 3 of the present invention at a corresponding position a. .
Fig. 7 is a partially enlarged schematic construction view of a battery module having a top locking mechanism according to embodiment 4 of the present invention at a corresponding position a. .
Fig. 8 is a schematic view of a battery module with a top locking mechanism according to embodiment 5 of the present invention.
Detailed Description
In order that the manner in which the above-recited features, advantages, objects and advantages of the invention are obtained, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
Example 1
As shown in fig. 1 to 4, a battery module of 4 batteries 1 is exemplified. The battery module with the top locking mechanism comprises a plurality of batteries 1 which are arranged in a row in the same direction. A locking mechanism 2 is connected between the battery top poles b of the batteries 1 which are arranged in the same direction of the battery module. The locking mechanism 2 is a top pole busbar. The top pole busbar is electrically connected with the right center position of the battery top pole b of the battery 1 through a conductor. The conductor may be a third electrical conductor or a body extension of the top pole buss. The upper surface of the battery top pole b is higher than or equal to the shoulder plane of the battery. The top pole busbar forms a downward bent arc shape above the battery top pole b to compress the conductor and the battery top pole b, and can be electrically connected with the battery top pole b through normal-temperature curing conductive adhesive, and then is glued and fixed with shoulder planes on two sides of the battery top to keep the compression force. The top pole buss bar may be bent to form a bent structure 8 having a drop shape, a circular shape, an oval shape, a square shape, or a triangle shape. The bending structures 8 are positioned between the necks of adjacent cells and are clamped at the notches of the necks of the adjacent cells 1. The battery top pole b is connected in parallel through a top pole bus. The external extending parts at the two ends of the locking mechanism 2 are external leads. And the external lead is an external electrode post of the battery top electrode post b. The external pole is an extension part 3 of the locking mechanism body, or an extension part 3 of the conductor after being reliably and electrically connected with two ends of the locking mechanism. The housing post a of the battery 1 is located at the top and is the region other than the battery top post b. Meanwhile, insulating layers are arranged among a shoulder shell of the battery, which is positioned in a non-top pole area at the top, a side surface of the shell and a neck notch area.
The battery module of example 1 was subjected to a tensile test (tensile force for testing breakage between batteries) and a resistance test, and the specific results are shown in the following table:
table 1 maximum tensile force and resistance value of battery module
| Number of times | Separating tension (N) | Resistor (ohm) |
| 1 | 133 | 2.0 |
| 2 | 137 | 2.1 |
| 3 | 136 | 2.0 |
| 4 | 139 | 1.9 |
| 5 | 135 | 2.1 |
In summary, the battery module provided by the invention can bear more than 100N of tensile force without damage, and the resistance is about 2 ohms, so that the battery module completely meets the requirements of the battery industry.
Example 2
Based on embodiment 1, as shown in fig. 3, a low melting point metal conductor 5 or an alloy conductor is disposed between the upper end of the center of the battery top post b and the top post bus bar. The low-melting-point metal conductor 5 is a third conductor. And the outer side of the bottom of the third conductor is coated with normal-temperature curing structural adhesive, or the inner side of the third conductor is coated with conductive adhesive. The third conductor can be one of a metal conductor, a nonmetal conductor and a conductive composite, wherein the outer side of the bottom of the third conductor is coated with normal-temperature curing structural adhesive, and the inner side of the third conductor is coated with conductive adhesive. The electrical connection state between the top pole busbar and the top pole is locked through the normal-temperature curing of the normal-temperature curing structural adhesive or the conductive adhesive. The third conductor is electrically connected in a welding, riveting, crimping or conductive adhesive bonding mode, so that reliable electrical connection and structural connection with the top pole busbar are realized. The upper surface of the third conductor is higher than the shoulder plane of the battery. The top pole busbar forms a downward-bending arc shape above the top pole, and after the expansion opening structures at the two ends are expanded, the top pole busbar compresses the third conductor, the top pole and the shoulder top of the adjacent battery, and after the shoulder top squeezing part of the adjacent battery is locked by the normal-temperature curing structural adhesive, the top pole busbar keeps the compressing force.
The low-melting-point metal conductor 5 and the top pole busbar are electrically connected in a direct electrical connection mode of welding, crimping or riveting or in an indirect electrical connection mode of connecting by using normal-temperature curing conductive adhesive, so that reliable electrical connection and structural connection with the top pole busbar are realized. The low-melting-point metal conductor 5 is electrically connected with the top pole b of the battery through normal-temperature solidified conductive adhesive. The non-contact surface area of the battery top pole b and the low-melting point metal conductor 5 is provided with an insulating layer. The melting point range of the low-melting point metal conductor 5 or the alloy conductor is 35-70 ℃.
The low melting point metal conductor 5 or alloy conductor can function as a temperature fuse to reduce contact resistance while ensuring that a large current can be passed at normal use temperatures. Therefore, the low-melting metal conductor 5 is automatically melted when the temperature of the battery 1 is increased to its melting range, thereby disconnecting the battery 1, so that the electrical connection performance and the overall safety performance of the battery module are more reliable.
The low-melting point metal conductor 5 or the alloy conductor is of a columnar structure, and the height of the columnar structure is larger than the height difference between the upper end of the battery shoulder and the plane of the top pole. The cross-sectional area of the columnar structure is greater than or equal to the area of the electric flux required by the upper limit of the battery overcurrent. The housing parts of the cell housing facing the top pole region are each coated with an impermeable insulating layer
As shown in fig. 4, the bending structure 8 fixes the two ends of the top pole busbar, so that the two ends of the tensioned top pole busbar are subjected to a downward oblique pulling force F 1 。F 1 The downward force of decomposition subjects the third electrical conductor to a positive downward pressure F from the top pole bus 2 Thereby compressing the top pole and reducing contact resistance. The top pole bus bar is simultaneously subjected to a reaction force F from a third electrical conductor 3 Thereby at F 1 And F is equal to 3 Under the combined action of the components, the whole structure tends to be stable.
Example 2
Based on example 1, as shown in fig. 5, the top post bus bar located at the upper end of the center of the battery top post b has a downward notching bump 4 thereon. The notching convex point 4 has certain elasticity. The notching bump 4 is pressed down and abutted against the battery top post b, so that the formed deformation is abutted against between the top post busbar and the battery top post b to be kept in adhesion and electrically connected through normal-temperature curing conductive adhesive.
Through the notching convex points 4, the top pole busbar can be ensured to be pressed on the top pole b of the battery, and the positive pressure is increased, so that the contact resistance is reduced, and the whole electric connection performance is more reliable.
Example 3
Based on embodiment 2, as shown in fig. 6, the third conductor is a separate folded conductive sheet. The bending conductive sheet can be an L-shaped, U-shaped or S-shaped bending conductive sheet or an arc-like bending conductive sheet with an arc-shaped bottom horizontal upper end. The upper ends of the independent bending conductive sheets are connected with the top pole bus bars in a direct electric connection mode of welding, riveting and crimping or in an indirect electric connection mode of conductive adhesive bonding. The lower end of the bent conductive sheet is elastically pressed on the top pole of the battery through deformation, and is electrically connected with the top pole of the battery through the mode of bonding conductive adhesive cured at normal temperature or bonding the periphery of structural adhesive cured at normal temperature. In this embodiment, the low-melting metal conductor 5 is replaced with a U-shaped bent conductive sheet 6. One side of the U-shaped bending conducting strip 6 is fixed with the top pole busbar through welding. The other side of the U-shaped bent conducting strip 6 is bonded with the top pole b of the battery through conducting adhesive.
The U-shaped bending conductive sheet 6 has certain elasticity, when the top pole busbar is pressed against the U-shaped bending conductive sheet 6, the U-shaped bending conductive sheet 6 deforms, and the deformation rebound trend makes the U-shaped bending conductive sheet upwards or downwards respectively press against the top pole busbar and the battery top pole b, so that the positive pressure between the top pole busbar and the battery top pole b is increased, the contact resistance is reduced, and the whole electric connection performance is more reliable.
Example 4
Based on example 3, as shown in fig. 7, the U-shaped bending piece 6 is replaced with an arcuate-like bending conductive piece 7 with a horizontal bottom and an arc upper end. The bottom side of the arc-like bending conducting strip 7 is provided with a notch, and the arc-shaped surface of the arc-like bending conducting strip is welded and fixed with the top pole busbar. The horizontal plane of the arc-like bending conductive sheet 7 is bonded with the top pole b of the battery through conductive adhesive.
The bow-like bending conductive sheet 7 has certain elasticity, and compared with the U-shaped bending conductive sheet 6, when the bow-like bending conductive sheet 7 is pressed by the battery top pole b, the bow-like bending conductive sheet 7 has stronger tendency of deformation rebound, has better bottom supporting performance, ensures that the positive pressure between the top pole busbar, the bow-like bending conductive sheet 7 and the battery top pole b is larger, has lower contact resistance, and ensures that the whole electric connection performance is more reliable.
Example 5
Based on embodiment 1, as shown in fig. 8, the height of the upper surface of the battery top post b is lower than or equal to the height of the shoulder of the battery 1. The top pole busbar is bent downwards to pass through the through hole of the pole cap of the battery 1 to form an upward bent arc shape, and is electrically connected with the contact point of the battery top pole b through the solidified conductive adhesive. The top pole busbar is fixed with shoulders on two sides of the battery top pole b of the battery 1 through gluing so as to keep tension.
This embodiment 5 can further increase the stability of the overall structure between the battery top post b and the top post bus.
The plurality of battery modules can form a large parallel array module, and the adjacent battery modules in the plurality of battery modules are arranged in a matrix, a diamond or a staggered complementary mode which are overlapped in the same direction and sequence. The top pole buses of adjacent battery modules are electrically connected with each other. The shell pole buses of adjacent battery modules can be connected with the shell poles of all batteries in sequence through the same bus bar, so that the parallel connection of the shell poles is formed.
Example 6
A battery pack comprising the above parallel array type large module.
Example 7
A power supply provided with the battery pack.
The foregoing has shown and described the basic principles, features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (12)
1. Battery module with top locking mechanism, its characterized in that: the battery module with the top locking mechanism comprises a plurality of cylindrical batteries which are arranged in a row in the same direction and a locking mechanism arranged between the tops of the adjacent batteries, wherein the locking mechanism is a strip-shaped top pole busbar arranged between the tops of the adjacent batteries, the top pole busbar forms an expansion opening structure by downwards turning back, the battery top poles are connected in parallel through the top pole busbar and conductors, the conductors are third conductors or body extension parts of the top pole busbar, and the expansion opening structure is clamped between neck notches of the adjacent battery shells and can be used for tightening the top pole busbar on two sides above through filling a solidified object or a curable structural adhesive after expanding so as to keep tightening force and prevent retraction.
2. The battery module with a top locking mechanism of claim 1, wherein: the expansion opening structure is a water drop-shaped, round, elliptic, square or triangular bending structure; an insulating layer is arranged among the shoulder shell of the battery, which is positioned in the non-top pole area of the top, the side surface of the shell and the neck notch area.
3. The battery module with a top locking mechanism of claim 1, wherein: the external extension parts at two ends of the locking mechanism are external wires, the external wires are external poles of the poles at the top of the module, and the external poles are extension parts of the locking mechanism body or extension parts of the conductor after the conductor is reliably and electrically connected with the two ends of the locking mechanism.
4. The battery module with a top locking mechanism of claim 1, wherein: the bottom outer side of the third conductor is coated with normal temperature curing structural adhesive, or the inner side of the third conductor is coated with conductive adhesive, the third conductor is one of a metal conductor and a nonmetal conductor, the bottom outer side of the third conductor is coated with normal temperature curing structural adhesive, the inner side of the third conductor is coated with conductive adhesive, the conductive composite is locked with the electric connection state between the top pole busbar and the top pole through normal temperature curing of the normal temperature curing structural adhesive or the conductive adhesive, and the third conductor is electrically connected in a welding, riveting, crimping or conductive adhesive bonding mode, so that reliable electric connection and structural connection with the top pole busbar are realized; the upper surface of the third conductor is higher than the shoulder plane of the battery, the top pole busbar forms a downward bent arc shape above the top pole, and after the expansion port structures at the two ends are expanded, the top pole busbar compresses the third conductor, the top pole and the shoulder top of the adjacent battery, and after the shoulder top compression part of the adjacent battery is locked by normal-temperature curing structural adhesive, the top pole busbar keeps compression force.
5. The battery module with a top locking mechanism of claim 1, wherein: the third conductor is a low-melting-point metal conductor or an alloy conductor; the melting point range of the low-melting-point metal conductor or the alloy conductor is 35-70 ℃; the third conductor is provided on the surface of the top post bus bar in advance.
6. The battery module with a top locking mechanism of claim 5, wherein: the low-melting-point metal conductor or alloy conductor is electrically and structurally connected with the busbar in an electric connection mode of cold welding connection, crimping, riveting or surface coating shaping, and the low-melting-point metal conductor or alloy conductor is connected with the top pole of the battery through normal-temperature solidified conductive adhesive or normal-temperature solidified structural adhesive; the low-melting-point metal conductor or the alloy conductor is of a columnar structure, and the height of the columnar structure is larger than the height difference between the upper end of the battery shoulder and the plane of the top pole; the sectional area of the columnar structure is larger than or equal to the electric flux area required by the upper limit of the battery overcurrent; the housing portions of the cell housing facing the top post region are each coated with an impermeable insulating layer.
7. The battery module with a top locking mechanism of claim 1, wherein: the third conductor is an independent bending conductive sheet, the bending conductive sheet is an L-shaped, U-shaped or S-shaped bending conductive sheet, or an arc-like bending conductive sheet at the upper end of the bottom part horizontally, the upper end of the independent bending conductive sheet is connected with the top pole busbar in a direct electric connection mode of welding, riveting and crimping or in an indirect electric connection mode of conductive adhesive bonding, and the lower end of the bending conductive sheet is elastically pressed on the top pole of the battery in a deformation elastic manner and is electrically connected with the top pole of the battery in a peripheral bonding mode of conductive adhesive bonding at normal temperature or structural adhesive curing at normal temperature.
8. The battery module with a top locking mechanism of claim 1, wherein: the body extension part of top post busbar is that top post busbar just has decurrent bump of punching out on top post central point put, the bump of punching out has certain elasticity, after the top post busbar both ends were locked, the bump of punching out formed the downforce to top post, and the bump of punching out keeps the solidification of laminating and solidifying the conducting resin through normal atmospheric temperature with top post surface, locks and is connected in order to improve vibration reliability between this bump of punching out and the top post.
9. The battery module with a top locking mechanism of claim 1, wherein: the upper surface height of battery top utmost point post is less than or equal to the height of battery shoulder, top utmost point post busbar is bent down and is passed the through-hole of utmost point cap in order to form the arcuation that upwards bends to be connected through solidification conductive adhesive electricity with the contact point of battery top utmost point post, the shoulder of top utmost point post busbar and battery top utmost point post both sides is fixed in order to keep the tension through gluing.
10. A parallel array type large module composed of the battery modules having the top locking mechanism according to any one of claims 1 to 9, characterized in that: the parallel array type large module comprises a plurality of battery modules, wherein the adjacent battery modules are arranged in a matrix, diamond or staggered and complementary mode which are overlapped in the same direction, top electrode post bus bars of the adjacent battery modules are electrically connected with each other, and shell electrode post bus bars of all batteries can be sequentially connected with each other through the same bus bar to form the parallel connection of the shell electrode posts.
11. A battery pack, characterized in that: the battery pack includes the parallel array type large module set according to claim 10.
12. A power supply, characterized by: the power supply comprising the battery pack of claim 11.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110129489.2A CN112803122B (en) | 2021-01-29 | 2021-01-29 | Battery module with locking mechanism, array type large module, battery pack and power supply |
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| CN202110129489.2A CN112803122B (en) | 2021-01-29 | 2021-01-29 | Battery module with locking mechanism, array type large module, battery pack and power supply |
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| CN112803122B true CN112803122B (en) | 2023-07-28 |
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| CN113241491B (en) * | 2021-06-02 | 2024-06-25 | 嘉兴模度新能源有限公司 | Group structure of cylindrical battery row-to-row series connection |
| CN113258221B (en) * | 2021-06-23 | 2021-09-17 | 武汉理工大学 | Cold connection method for hard-shell lithium battery pole column and connecting sheet |
| CN113644385B (en) * | 2021-08-13 | 2023-01-31 | 傲普(上海)新能源有限公司 | Battery cell module assembling method, battery cell module and battery pack |
| CN114300810A (en) * | 2021-08-27 | 2022-04-08 | 嘉兴模度新能源有限公司 | Battery pack, battery pack and manufacturing method thereof |
| CN113644386B (en) * | 2021-10-15 | 2022-05-17 | 嘉兴模度新能源有限公司 | Battery row, battery pack and manufacturing method thereof |
| CN115084769B (en) * | 2022-08-18 | 2022-12-13 | 嘉兴模度新能源有限公司 | Battery pack and battery installation method |
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| CN111900300A (en) * | 2020-08-18 | 2020-11-06 | 嘉兴模度新能源有限公司 | Battery module locked by deformation |
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