Battery square preassembling structure and heavy energy storage device

Abstract

The utility model provides a square battery preassembling structure and a heavy energy storage device. The plurality of diversion composite plates of the square preassembling structure of the battery are respectively arranged on the first preassembling square frame and the second preassembling square frame; the plurality of cylindrical battery cells are embedded between the first preassembled square frame and the second preassembled square frame in a matrix manner; a transverse separation gap is formed between every two transversely adjacent cylindrical battery cells, a longitudinal separation gap is formed between every two longitudinally adjacent cylindrical battery cells, a communication gap is formed between every two obliquely adjacent cylindrical battery cells, and each transverse separation gap and each longitudinal separation gap are respectively communicated with the corresponding communication gap; the first pressure relief and heat dissipation holes of the first preassembled square frame correspondingly communicate with the first side of the communication gap one by one, and the second pressure relief and heat dissipation holes of the second preassembled square frame correspondingly communicate with the second side of the communication gap one by one, so that the transverse separation seams, the longitudinal separation seams, the communication gap, the first pressure relief and heat dissipation holes and the second pressure relief and heat dissipation holes communicate with one another. And heat in the plurality of cylindrical battery cells can be timely discharged and rapidly discharged.

Description

Technical Field

[0001] The present disclosure relates to the technical field of heavy-duty energy storage, and in particular to a square pre-installed battery structure and a heavy-duty energy storage device. Background Art

[0002] With the widespread use of new energy, people have put forward higher requirements on the capacity of energy storage products. In order to meet market demand, manufacturers have developed heavy-duty energy storage devices, such as energy storage cabinets, energy storage containers, and automotive power battery packs. However, in order to fully improve the assembly reliability of heavy-duty energy storage devices, some manufacturers have made further designs on the arrangement of each energy storage unit in heavy-duty energy storage devices.

[0003] For example, Chinese patent document CN116864887A discloses a battery box for energy storage, including: a box body, the box body including a load-bearing base, a box side wall, and a top cover, the load-bearing base is a horizontally placed rectangular flat plate, the load-bearing base is located at the bottom of the box body, the upper surface of the load-bearing base is used to carry a battery pack, the box side wall is in the shape of a rectangular square tube with upper and lower openings, the bottom of the box side wall is detachably connected to the side of the load-bearing base, the box side wall is non-contactly covered from top to bottom on the outside of the battery pack, the top of the box side wall is detachably connected to the top cover, and the load-bearing base, the box side wall, and the top cover are fastened together to form a closed cavity to seal the battery pack inside.

[0004] However, the design of the above-mentioned energy storage battery box has the following problems:

[0005] Although the above-mentioned energy storage battery box can improve the unit energy density by making the battery pack compact and reducing the use volume, the square battery in the battery pack has a large energy density, so the square battery will generate a lot of heat during the charging and discharging process, and the close contact structure of the battery pack will make the square batteries closely contact each other, hindering the heat dissipation process, so that a lot of heat is collected inside the battery pack and causing safety accidents. At the same time, when any square battery in the battery pack leaks, it is more likely to affect other adjacent square batteries, resulting in poor stability in the use of the entire energy storage battery box. Utility Model Content

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a square battery pre-installed structure and a heavy-duty energy storage device that are easy to dissipate heat and have high stability.

[0007] The purpose of this disclosure is achieved through the following technical solutions:

[0008] A square pre-assembled battery structure, comprising a first pre-assembled square frame, a second pre-assembled square frame, a plurality of cylindrical cells and a plurality of guide composite plates;

[0009] A plurality of the guide composite plates are respectively arranged on the first pre-installed square frame and the second pre-installed square frame; a plurality of the cylindrical cells are embedded in a matrix between the first pre-installed square frame and the second pre-installed square frame; in two adjacent rows of the cylindrical cells, the electrode ends of the cylindrical cells in the rear row are connected to the electrode ends of the cylindrical cells in the front row through the guide composite plates; a transverse partition is formed between two laterally adjacent cylindrical cells, a longitudinal partition is formed between two longitudinally adjacent cylindrical cells, and a connecting gap is formed between two obliquely adjacent cylindrical cells, and each of the transverse partition and each of the longitudinal partition are respectively connected to the corresponding connecting gap;

[0010] The first pre-assembled square frame is provided with a plurality of first pressure relief and heat dissipation holes, and the second pre-assembled square frame is provided with a plurality of second pressure relief and heat dissipation holes, each of the first pressure relief and heat dissipation holes is connected to the first side of the connecting gap one by one, and each of the second pressure relief and heat dissipation holes is connected to the second side of the connecting gap one by one.

[0011] In one embodiment, the square pre-installed structure of the battery is characterized in that the first pre-installed square frame extends into at least a portion of the connecting gap to form a first pillar, and the second pre-installed square frame extends toward the first pillar to form a second pillar, and the first pillar is plug-connected with the second pillar.

[0012] In one of the embodiments, the square battery pre-installed structure is characterized in that the square battery pre-installed structure also includes bolts and nuts; a first through hole is opened in the first pillar, a second through hole is opened in the second pillar, and the first through hole is connected to the second through hole; the bolts are respectively passed through the first through hole and the second through hole, and are screwed to the nuts.

[0013] In one of the embodiments, the square pre-installed battery structure is characterized in that the square pre-installed battery structure also includes a plurality of signal lines, a concave pressure frame and a circuit protector; the concave pressure frame is arranged between the first pre-installed square frame and the second pre-installed square frame, and is attached to the peripheral wall of the outermost cylindrical battery cell among the plurality of cylindrical battery cells; the circuit protector is installed on the concave pressure frame, and is connected to the corresponding guide composite plate through each of the signal lines.

[0014] In one of the embodiments, the square battery pre-installed structure is characterized in that an insulating protective spacer is provided between the concave pressing frame and the peripheral wall of the outermost cylindrical battery cell among the plurality of cylindrical battery cells.

[0015] In one embodiment, the square pre-installed structure of the battery is characterized in that the plurality of the guide composite plates are divided into a plurality of first guide composite plates and a plurality of second guide composite plates; the first pre-installed square frame is provided with a plurality of first installation holes; a plurality of the first guide composite plates are laid side by side on the first pre-installed square frame and cover a plurality of the first installation holes; the second pre-installed square frame is provided with a plurality of second installation holes; a plurality of the second guide composite plates are laid side by side on the second pre-installed square frame and cover a plurality of the second installation holes; the first electrode end of each of the cylindrical battery cells is abutted against the corresponding first guide composite plate through the corresponding first installation hole; the second electrode end of each of the cylindrical battery cells is abutted against the corresponding second guide composite plate through the corresponding second installation hole.

[0016] In one of the embodiments, the square pre-installed structure of the battery is characterized in that the square pre-installed structure of the battery also includes a first electrode isolation plate, which is arranged on the first pre-installed square frame and covers the side of the first guide composite plate away from the first electrode end of the cylindrical battery cell; the first electrode isolation plate is provided with a plurality of first isolation heat dissipation holes, and each of the first isolation heat dissipation holes is connected to each of the first pressure relief heat dissipation holes one by one.

[0017] In one of the embodiments, the square pre-assembled battery structure is characterized in that the current guide composite plate includes a copper current carrier and a nickel electrode conductor, the inner side of the nickel electrode conductor is welded to the electrode end of the corresponding cylindrical battery cell, and the copper current carrier is adhered and connected to the outer side of the nickel electrode conductor.

[0018] In one embodiment, the square pre-installed structure of the battery is characterized in that the nickel electrode guide comprises a bending portion and a pressing core portion, the bending portion is bent toward the electrode end of the cylindrical battery cell, the pressing core portion is connected to the end of the bending portion, and the pressing core portion contacts and is welded to the electrode end of the cylindrical battery cell.

[0019] A heavy-duty energy storage device comprises any of the above-mentioned square battery pre-installed structures.

[0020] Compared with the prior art, the present invention has at least the following advantages:

[0021] 1) By embedding a plurality of cylindrical cells between the first pre-installed square frame and the second pre-installed square frame, the first side of the cylindrical cell can be fixed by the first pre-installed square frame, and the second side of the cylindrical cell can be fixed by the second pre-installed square frame, so that the loose cylindrical cells can be assembled into the above-mentioned square battery pre-installed structure. Compared with the cylindrical cells, the above-mentioned square battery pre-installed structure has more edges, which is more convenient for automated equipment to grasp and assemble, and finally improves the efficiency of subsequent automated assembly of heavy energy storage devices.

[0022] 2) Compared with the energy storage battery box of the prior art, the above-mentioned square battery pre-installed structure is formed by arranging cylindrical cells in a matrix. Compared with a single square battery, a single cylindrical cell has a lower energy density and generates less heat energy during the charging and discharging process. At the same time, by providing a transverse gap between two cylindrical cells adjacent to each other in the transverse direction, forming a longitudinal gap between two cylindrical cells adjacent to each other in the longitudinal direction, and forming a connecting gap between two cylindrical cells adjacent to each other in the oblique direction, it is also possible to effectively avoid the cylindrical cells from contacting each other and collecting heat.

[0023] 3) By connecting each transverse slit and each longitudinal slit to the corresponding connecting gap, and connecting the first side of the connecting gap to the first pressure relief and heat dissipation hole, a pressure relief and heat dissipation path is formed between the corresponding transverse slit, the corresponding longitudinal slit, the corresponding first pressure relief and heat dissipation hole, and the corresponding second pressure relief and heat dissipation hole, so that the heat energy generated by the cylindrical cells during the charging and discharging process is discharged in time through the corresponding pressure relief and heat dissipation path. At the same time, compared with the energy storage battery box of the prior art, when any cylindrical cell leaks, the leaked liquid can also be discharged in time through the pressure relief and heat dissipation path, thereby reducing the interference with other adjacent cylindrical cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 An exploded view of a square pre-assembled battery structure according to an embodiment of the present disclosure;

[0026] Figure 2 for Figure 1 A partial enlarged view shown in the middle A;

[0027] Figure 3 for Figure 1 A partial enlarged view shown at B in the middle;

[0028] Figure 4 for Figure 1 The assembly state diagram of the square pre-assembled structure of the battery shown;

[0029] Figure 5 for Figure 4 The enlarged partial view shown at C in the middle;

[0030] Figure 6 for Figure 4 The partial enlarged view shown at D in the middle;

[0031] Figure 7 for Figure 1 A cross-sectional view of a battery showing a square pre-assembled structure of the battery.

[0032] Figure numerals: 10, square pre-installed battery structure; 100, first pre-installed square frame; 110, first pressure relief and heat dissipation hole; 120, first pillar; 1210, first penetration hole; 130, first installation hole; 200, second pre-installed square frame; 210, second pressure relief and heat dissipation hole; 220, second pillar; 2210, second penetration hole; 230, second installation hole; 300, cylindrical battery cell; 310, electrode end; 3110, first electrode end; 3120, second electrode end; 320, horizontal Partition; 330, longitudinal partition; 340, connecting gap; 400, guide composite plate; 410, first guide composite plate; 420, second guide composite plate; 430, copper current carrier; 440, nickel pole conductor; 4410, bending portion; 4420, core pressing portion; 500, bolt; 600, nut; 710, signal line; 720, concave pressure frame; 7210, insulating protection gasket; 730, circuit protector; 800, first electrode isolation plate; 810, first isolation heat dissipation hole. DETAILED DESCRIPTION

[0033] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0036] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0037] like Figures 1 to 3 As shown, a square battery pre-assembled structure 10 of an embodiment includes a first pre-assembled square frame 100, a second pre-assembled square frame 200, a plurality of cylindrical battery cells 300 and a plurality of guide composite plates 400; the plurality of guide composite plates 400 are respectively arranged on the first pre-assembled square frame 100 and the second pre-assembled square frame 200; the plurality of cylindrical battery cells 300 are embedded in a matrix between the first pre-assembled square frame 100 and the second pre-assembled square frame 200; in two adjacent rows of single cells, the electrode ends 310 of the cylindrical battery cells 300 in the rear row are connected to the electrode ends 310 of the cylindrical battery cells 300 in the front row through the guide composite plates 400; the two cylindrical battery cells 300 adjacent to each other in the horizontal direction are connected to the electrode ends 310 of the cylindrical battery cells 300 in the front row through the guide composite plates 400; A transverse partition 320 is formed between each of the two cylindrical battery cells 300 adjacent in the longitudinal direction, a longitudinal partition 330 is formed between each of the two cylindrical battery cells 300 adjacent in the diagonal direction, and a connecting gap 340 is formed between each of the two cylindrical battery cells 300 adjacent in the diagonal direction, and each transverse partition 320 is connected to each longitudinal partition 330 at the corresponding connecting gap 340 respectively; the first pre-assembled square frame 100 is provided with a plurality of first pressure relief and heat dissipation holes 110, and the second pre-assembled square frame 200 is provided with a plurality of second pressure relief and heat dissipation holes 210, each of the first pressure relief and heat dissipation holes 110 is connected to the first side of the connecting gap 340 one by one, and each of the second pressure relief and heat dissipation holes 210 is connected to the second side of the connecting gap 340 one by one.

[0038] It can be understood that by embedding a plurality of cylindrical battery cells 300 between the first pre-assembled square frame 100 and the second pre-assembled square frame 200, the first side of the cylindrical battery cell 300 can be fixed by the first pre-assembled square frame 100, and the second side of the cylindrical battery cell 300 can be fixed by the second pre-assembled square frame 200, and finally the loose cylindrical battery cells 300 can be assembled together into the above-mentioned square battery pre-assembled structure 10, so that the above-mentioned square battery pre-assembled structure 10 has more edges compared with the cylindrical battery cells 300, which is more convenient for automated equipment to grasp and assemble, and finally improves the efficiency of subsequent automated assembly of heavy energy storage devices.

[0039] It can be understood that, compared with the energy storage battery box of the prior art, the above-mentioned square battery pre-installed structure 10 is formed by arranging cylindrical cells 300 in a matrix, and a single cylindrical cell 300 has a lower energy density than a single square battery, and generates less heat energy during the charging and discharging process. At the same time, by providing a transverse partition 320 between two cylindrical cells 300 adjacent in the transverse direction, forming a longitudinal partition 330 between two cylindrical cells 300 adjacent in the longitudinal direction, and forming a connecting gap 340 between two cylindrical cells 300 adjacent in the oblique direction, it is also possible to effectively avoid the cylindrical cells 300 from contacting each other and collecting heat.

[0040] It can be understood that by making each transverse slit 320 and each longitudinal slit 330 connected to the corresponding connecting gap 340 respectively, and making the first side of the connecting gap 340 connected to the first pressure relief and heat dissipation hole 110, a pressure relief and heat dissipation path is formed between the corresponding transverse slit 320, the corresponding longitudinal slit 330, the corresponding first pressure relief and heat dissipation hole 110 and the corresponding second pressure relief and heat dissipation hole 210, and the heat energy generated by the cylindrical cells 300 during the charging and discharging process is discharged in time through the corresponding pressure relief and heat dissipation path. At the same time, compared with the energy storage battery box of the prior art, when any cylindrical cell 300 leaks, the leaked liquid can also be discharged in time through the pressure relief and heat dissipation path, thereby reducing the interference with other adjacent cylindrical cells 300.

[0041] Combination Figure 1 and Figure 3 As shown, in this embodiment, the first pre-assembled square frame 100 extends into at least part of the connected gap 340 to form a first pillar 120, and the second pre-assembled square frame 200 extends toward the first pillar 120 to form a second pillar 220, and the first pillar 120 is plugged and connected with the second pillar 220. It can be understood that the first pre-assembled square frame 100 and the second pre-assembled square frame 200 can be positioned, aligned and firmly connected through the plug-in connection of the first pillar 120 and the second pillar 220, thereby enhancing the stability and overall strength of the square pre-assembled battery structure 10.

[0042] Combination Figure 1 and Figure 4As shown, further, the square pre-installed structure 10 of the battery also includes a plurality of signal lines 710, a concave pressing frame 720 and a circuit protector 730; the concave pressing frame 720 is arranged between the first pre-installed square frame 100 and the second pre-installed square frame 200, and is attached to the peripheral wall of the outermost cylindrical battery cell 300 among the plurality of cylindrical battery cells 300; the circuit protector 730 is installed on the concave pressing frame 720, and is connected to the corresponding guide composite plate 400 through each signal line 710. It can be understood that by attaching the concave pressing frame 720 to the peripheral wall of the outermost cylindrical battery cell 300 among the plurality of cylindrical battery cells 300, the first pre-installed square frame 100, the second pre-installed square frame 200 and the concave pressing frame 720 can jointly protect the plurality of cylindrical battery cells 300, so that the plurality of cylindrical battery cells 300 are protected from external impact, and the protection of the cylindrical battery cells 300 is enhanced. At the same time, by installing a circuit protector 730 on the concave pressing frame 720 and connecting each signal line 710 to the corresponding guide composite plate 400, the circuit protector 730 can monitor the voltage and current changes of the guide composite plate 400 in real time through each signal line 710, to prevent the voltage and current of the cylindrical battery cell 300 from being too large during the charging and discharging process and causing safety accidents, and ultimately ensure the safety and stability of the above-mentioned square battery pre-installed structure 10. Among them, the circuit protector 730 can be a BMS (Battery Monitoring and Management System) module, etc., which is not limited here.

[0043] Combination Figure 1 As shown, in this embodiment, an insulating protective spacer 7210 is further provided between the concave pressing frame 720 and the peripheral wall of the outermost cylindrical battery cell 300 among the plurality of cylindrical battery cells 300. It can be understood that by providing the insulating protective spacer 7210 between the concave pressing frame 720 and the peripheral wall of the outermost cylindrical battery cell 300 among the plurality of cylindrical battery cells 300, when installing the battery pack, the insulating protective spacer 7210 can prevent the concave pressing frame 720 from directly contacting the cylindrical battery cell 300, thereby reducing the risk of the cylindrical battery cell 300 being scratched, damaged or leaking electricity, and ultimately improving the assembly yield rate of the above-mentioned square pre-installed structure 10 of the battery. Among them, the insulating protective spacer 7210 is a PC board (polycarbonate board) or the like, which is not limited here.

[0044] Combination Figure 1 and Figure 4As shown, in one embodiment, the square battery pre-assembled structure 10 further includes a first electrode separator 800, which is arranged on the first pre-assembled square frame 100 and covers the first guide composite plate 410, the guide composite plate 400, which is away from the first electrode end 3110 of the cylindrical battery cell 300. The first electrode separator 800 is provided with a plurality of first isolation heat dissipation holes 810, and each first isolation heat dissipation hole 810 is connected to each first pressure relief heat dissipation hole 110 in a one-to-one correspondence. It can be understood that by making the first electrode separator 800 cover the first guide composite plate 410, the guide composite plate 400, which is away from the first electrode end 3110 of the cylindrical battery cell 300, not only can the first guide composite plate 410 be protected, but also the square battery pre-assembled structure 10 can be prevented from causing a safety accident due to leakage through the first guide composite plate 410, the guide composite plate 400. At the same time, by making the first isolation heat dissipation holes 810 on the first electrode isolation plate 800 connected one by one with each first pressure relief heat dissipation hole 110, the heat can be effectively guided to be quickly dissipated through the first pressure relief heat dissipation holes 110 and the first isolation heat dissipation holes 810 in sequence, thereby improving the heat dissipation efficiency of the square pre-assembled structure 10 of the battery, avoiding overheating and damage to the cylindrical battery cell 300, and extending the service life of the above-mentioned square pre-assembled structure 10 of the battery.

[0045] In another embodiment, the square pre-assembled structure 10 of the battery also includes a second electrode isolation plate, which is arranged on the second pre-assembled square frame 200 and covers the second guide composite plate 420, the guide composite plate 400, and the side of the second electrode end 3120 electrode end 310 away from the cylindrical battery cell 300; the second electrode isolation plate is provided with a plurality of second isolation heat dissipation holes, each second isolation heat dissipation hole is connected to each second pressure relief heat dissipation hole 210 one by one, which can prevent the square pre-assembled structure 10 of the battery from causing a safety accident due to leakage of the first guide composite plate 410, and can quickly dissipate heat through the first pressure relief heat dissipation hole 110 and the first isolation heat dissipation hole 810 in sequence.

[0046] like Figure 6 and Figure 7As shown, in this embodiment, the square battery pre-installed structure 10 further includes a bolt 500 and a nut 600; a first through hole 1210 is provided in the first pillar 120, a second through hole 2210 is provided in the second pillar 220, and the first through hole 1210 is communicated with the second through hole 2210; the bolt 500 penetrates the first through hole 1210 and the second through hole 2210 respectively, and is screwed to the nut 600. It can be understood that by making the bolt 500 penetrate the first through hole 1210 and the second through hole 2210 respectively, and being screwed to the nut 600, the first pillar 120 and the second pillar 220 can be reliably connected, the overall stability of the square battery pre-installed structure 10 can be enhanced, and the connection between the first pillar 120 and the second pillar 220 can be fine-tuned as needed, so that the square battery pre-installed structure 10 can be assembled with cylindrical cells 300 of various lengths, and the tightness of the assembly can be flexibly adjusted.

[0047] Combination Figure 1 and Figure 4As shown, specifically, a plurality of guide composite plates 400 are divided into a plurality of first guide composite plates 410 guide composite plates 400 and a plurality of second guide composite plates 420 guide composite plates 400; a first pre-installed square frame 100 is provided with a plurality of first installation holes 130; a plurality of first guide composite plates 410 guide composite plates 400 are laid side by side on the first pre-installed square frame 100 and cover the plurality of first installation holes 130; a second pre-installed square frame 200 is provided with a plurality of second installation holes 230; a plurality of second guide composite plates The 420 guide composite plates 400 are laid side by side on the second pre-assembled square frame 200 and cover a number of second installation holes 230; the first electrode end 3110 electrode end 310 of each cylindrical battery cell 300 is abutted against the corresponding first guide composite plate 410 guide composite plate 400 through the corresponding first installation hole 130; the second electrode end 3120 electrode end 310 of each cylindrical battery cell 300 is abutted against the corresponding second guide composite plate 420 guide composite plate 400 through the corresponding second installation hole 230. It can be understood that because the first electrode terminal 3110 of the cylindrical battery cell 300 is abutted against the corresponding first guide composite plate 410 guide composite plate 400 through the corresponding first installation hole 130, the second electrode terminal 3120 of the cylindrical battery cell 300 is abutted against the corresponding second guide composite plate 420 guide composite plate 400 through the corresponding second installation hole 230, and the electrode terminal 310 of each of the cylindrical battery cells 300 located in the rear row is connected to the corresponding second guide composite plate 420 guide composite plate 400 through the corresponding second installation hole 230. The flow composite plate 400 is connected to the electrode ends 310 of each of the cylindrical battery cells 300 located in the front row, so that the first electrode ends 3110 electrode ends 310 of several cylindrical battery cells 300 and the second electrode ends 3120 electrode ends 310 of several cylindrical battery cells 300 can be connected in parallel and in series through the first flow composite plate 410 flow composite plate 400 and the second flow composite plate 420 flow composite plate 400, thereby realizing the collection and transmission of current in the entire square pre-assembled structure 10 of the battery.

[0048] like Figure 1 As shown, in this embodiment, the current guide composite plate 400 includes a copper current carrier sheet 430 and a nickel pole conductor sheet 440, the inner side of the nickel pole conductor sheet 440 is welded to the electrode terminal 310 of the corresponding cylindrical battery cell 300, and the copper current carrier sheet 430 is attached to and connected to the outer side of the nickel pole conductor sheet 440. It can be understood that by welding the inner side of the nickel pole conductor sheet 440 to the electrode terminal 310 of the corresponding cylindrical battery cell 300, the nickel pole conductor sheet 440 has excellent welding performance, so that a reliable welding structure can be formed with the electrode terminal 310 of the cylindrical battery cell 300, and the copper current carrier sheet 430 is attached to and connected to the outer side of the nickel pole conductor sheet 440, so that the copper current carrier sheet 430 and the nickel pole conductor sheet 440 are connected, and the copper current carrier sheet 430 has excellent electrical conductivity and can conduct current more efficiently.

[0049] Please also read Figure 1 and Figure 5Specifically, the nickel electrode conductor 440 includes a bending portion 4410 and a pressing core portion 4420, the bending portion 4410 is bent toward the electrode terminal 310 of the cylindrical battery cell 300, the pressing core portion 4420 is connected to the end of the bending portion 4410, and the pressing core portion 4420 abuts against and is welded to the electrode terminal 310 of the cylindrical battery cell 300. It can be understood that by bending the bending portion 4410 toward the electrode terminal 310 of the cylindrical battery cell 300, the pressing core portion 4420 can be pressed against the electrode terminal 310 of the cylindrical battery cell 300, effectively preventing the loosening of the cylindrical battery cell 300 that may occur during current transmission, and facilitating the welding of the pressing core portion 4420 and the electrode terminal 310 of the cylindrical battery cell 300.

[0050] Please also read Figure 1 and Figure 2 The present disclosure also provides a heavy-duty energy storage device, including a square battery pre-installed structure 10 of any of the above-mentioned embodiments. It can be understood that, at the same time, by applying the above-mentioned square battery pre-installed structure 10 to the square battery pre-installed structure 10 of the present disclosure, because a transverse partition 320 is provided between two cylindrical battery cells 300 adjacent in the transverse direction, a longitudinal partition 330 is formed between two cylindrical battery cells 300 adjacent in the longitudinal direction, and a connecting gap 340 is formed between two cylindrical battery cells 300 adjacent in the oblique direction, a pressure relief and heat dissipation path is formed between the corresponding transverse partition 320, the corresponding longitudinal partition 330, the corresponding first pressure relief and heat dissipation hole 110 and the corresponding second pressure relief and heat dissipation hole 210, and the heat energy generated by the cylindrical battery cells 300 during the charging and discharging process is discharged in time through the corresponding pressure relief and heat dissipation path, and finally the heat collection between the cylindrical battery cells 300 can be avoided.

[0051] Compared with the prior art, the present invention has at least the following advantages:

[0052] 1) By embedding a plurality of cylindrical battery cells 300 between the first pre-assembled square frame 100 and the second pre-assembled square frame 200, the first side of the cylindrical battery cell 300 can be fixed by the first pre-assembled square frame 100, and the second side of the cylindrical battery cell 300 can be fixed by the second pre-assembled square frame 200, and finally the loose cylindrical battery cells 300 can be assembled together into the above-mentioned square battery pre-assembled structure 10, so that the above-mentioned square battery pre-assembled structure 10 has more edges than the cylindrical battery cells 300, which is more convenient for automated equipment to grasp and assemble, and finally improves the efficiency of subsequent automated assembly of heavy energy storage devices.

[0053] 2) Compared with the energy storage battery box of the prior art, the above-mentioned square battery pre-installed structure 10 is formed by arranging cylindrical cells 300 in a matrix. Compared with a single square battery, a single cylindrical cell 300 has a lower energy density and generates less heat energy during the charging and discharging process. At the same time, by providing a transverse partition 320 between two cylindrical cells 300 adjacent in the transverse direction, forming a longitudinal partition 330 between two cylindrical cells 300 adjacent in the longitudinal direction, and forming a connecting gap 340 between two cylindrical cells 300 adjacent in the oblique direction, it is also possible to effectively avoid the cylindrical cells 300 from contacting each other and collecting heat.

[0054] 3) By making each transverse slit 320 and each longitudinal slit 330 connected to the corresponding connecting gap 340, and making the first side of the connecting gap 340 connected to the first pressure relief and heat dissipation hole 110, a pressure relief and heat dissipation path is formed between the corresponding transverse slit 320, the corresponding longitudinal slit 330, the corresponding first pressure relief and heat dissipation hole 110 and the corresponding second pressure relief and heat dissipation hole 210, and the heat energy generated by the cylindrical cells 300 during the charging and discharging process is discharged in time through the corresponding pressure relief and heat dissipation path. At the same time, compared with the energy storage battery box of the prior art, when any cylindrical cell 300 leaks, the leaked liquid can also be discharged in time through the pressure relief and heat dissipation path, thereby reducing the interference with other adjacent cylindrical cells 300.

[0055] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the patent of the present disclosure shall be based on the attached claims.

Claims

1. A square battery pre-installed structure, characterized in that: It includes a first pre-assembled square frame, a second pre-assembled square frame, a plurality of cylindrical battery cells and a plurality of guide composite plates; A plurality of the guide composite plates are respectively arranged on the first pre-installed square frame and the second pre-installed square frame; a plurality of the cylindrical cells are embedded in a matrix between the first pre-installed square frame and the second pre-installed square frame; in two adjacent rows of the cylindrical cells, the electrode ends of the cylindrical cells in the rear row are connected to the electrode ends of the cylindrical cells in the front row through the guide composite plates; a transverse partition is formed between two laterally adjacent cylindrical cells, a longitudinal partition is formed between two longitudinally adjacent cylindrical cells, and a connecting gap is formed between two obliquely adjacent cylindrical cells, and each of the transverse partition and each of the longitudinal partition are respectively connected to the corresponding connecting gap; The first pre-assembled square frame is provided with a plurality of first pressure relief and heat dissipation holes, and the second pre-assembled square frame is provided with a plurality of second pressure relief and heat dissipation holes, each of the first pressure relief and heat dissipation holes is connected to the first side of the connecting gap one by one, and each of the second pressure relief and heat dissipation holes is connected to the second side of the connecting gap one by one.

2. The square battery pre-installed structure according to claim 1, characterized in that: The first preassembled square frame extends into at least a portion of the communicating gap to form a first support column, and the second preassembled square frame extends toward the first support column to form a second support column, and the first support column is plug-connected with the second support column.

3. The square battery pre-installed structure according to claim 2, characterized in that: The square battery pre-installed structure also includes bolts and nuts; a first through hole is opened in the first pillar, a second through hole is opened in the second pillar, and the first through hole is connected to the second through hole; the bolts are respectively passed through the first through hole and the second through hole, and are screwed to the nuts.

4. The square battery pre-installed structure according to claim 1, characterized in that: The square pre-installed battery structure also includes a plurality of signal lines, a concave pressure frame and a circuit protector; the concave pressure frame is arranged between the first pre-installed square frame and the second pre-installed square frame, and is attached to the peripheral wall of the outermost cylindrical battery cell among the plurality of cylindrical battery cells; the circuit protector is installed on the concave pressure frame and is connected to the corresponding guide composite plate through each of the signal lines.

5. The square battery pre-installed structure according to claim 4, characterized in that: An insulating protective spacer is also arranged between the concave pressing frame and the peripheral wall of the outermost cylindrical battery cell among the plurality of cylindrical battery cells.

6. The square battery pre-installed structure according to claim 1, characterized in that: The plurality of guide composite plates are divided into a plurality of first guide composite plates and a plurality of second guide composite plates; the first pre-assembled square frame is provided with a plurality of first installation holes; a plurality of the first guide composite plates are laid side by side on the first pre-assembled square frame and cover a plurality of the first installation holes; the second pre-assembled square frame is provided with a plurality of second installation holes; a plurality of the second guide composite plates are laid side by side on the second pre-assembled square frame and cover a plurality of the second installation holes; the first electrode end of each of the cylindrical battery cells is abutted against the corresponding first guide composite plate through the corresponding first installation hole; the second electrode end of each of the cylindrical battery cells is abutted against the corresponding second guide composite plate through the corresponding second installation hole.

7. The square battery pre-installed structure according to claim 6, characterized in that: The square pre-assembled battery structure also includes a first electrode isolation plate, which is arranged on the first pre-assembled square frame and covers the side of the first guide composite plate away from the first electrode end of the cylindrical battery cell; the first electrode isolation plate is provided with a plurality of first isolation heat dissipation holes, and each of the first isolation heat dissipation holes is connected to each of the first pressure relief heat dissipation holes in a one-to-one correspondence.

8. The square battery pre-installed structure according to claim 1, characterized in that: Each of the current-conducting composite plates comprises a copper current-carrying sheet and a nickel electrode conductor. The inner side of the nickel electrode conductor is welded to the electrode end of the corresponding cylindrical battery cell, and the copper current-carrying sheet is attached to and connected to the outer side of the nickel electrode conductor.

9. The square battery pre-installed structure according to claim 8, characterized in that: Each of the nickel electrode conductors includes a bending portion and a pressing core portion, wherein the bending portion is bent toward the electrode end of the cylindrical battery cell, the pressing core portion is connected to the end of the bending portion, and the pressing core portion abuts against and is welded to the electrode end of the cylindrical battery cell.

10. A heavy energy storage device, characterized in that: A square battery pre-installed structure comprising any one of claims 1 to 9.

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