Battery pack supporting frame and battery pack

Abstract

The utility model belongs to the field of batteries, and particularly relates to a battery pack supporting frame and a battery pack. The technical problem that maintenance cannot be smoothly completed in an energy storage power station due to the overlarge size of the battery pack is solved. The battery pack supporting frame comprises n sub-supporting frames, wherein n is an integer greater than 1; each sub-supporting frame is used for fixing at least two high-capacity batteries arranged in the x direction; in the x direction, the adjacent sub-supporting frames are connected with each other in a detachable mode. And in the x direction, the size of each sub-supporting frame is smaller than the distance between energy storage equipment and adjacent equipment in the energy storage power station. And when maintenance is needed, each sub-supporting frame can be disassembled for each battery pack, and each sub-battery pack is maintained.

Description

Technical Field

[0001] The utility model belongs to the field of batteries, and specifically relates to a battery pack support frame and a battery pack. Background Art

[0002] An energy storage power station consists of multiple energy storage devices and other functional devices supporting the energy storage devices. Due to the need to consider the maintenance and inspection space as well as fire safety, a certain safety distance must be ensured between each device.

[0003] When the size of each battery pack in the energy storage device is greater than this safety distance, the battery pack cannot be completely withdrawn from the energy storage device, resulting in the inability to smoothly complete the maintenance work. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a battery pack support frame and a battery pack, which overcome the technical problem that the maintenance cannot be smoothly completed in the energy storage power station due to the over - sized battery pack.

[0005] The first aspect of the utility model provides a battery pack support frame, which is used to be placed inside the box body of the energy storage device to support multiple large - capacity batteries; the battery pack support frame includes n sub - support frames, where n is an integer greater than 1;

[0006] Each sub - support frame is used to fix at least two large - capacity batteries arranged along the x - direction;

[0007] In the x - direction, adjacent sub - support frames are detachably connected to each other; moreover, in the x - direction, the size of each sub - support frame is smaller than the distance between the energy storage device and the adjacent device in the energy storage power station.

[0008] In the utility model, in the x - direction, the battery pack support frame is split into at least two sub - support frames. The number of sub - support frames can be determined according to the distance between the energy storage device and the adjacent device in the energy storage power station. At least it is necessary to ensure that the size of each sub - support frame in the x - direction is smaller than the distance between the energy storage device and the adjacent device in the energy storage power station. When maintenance is required, for each battery pack, each sub - support frame can be disassembled to perform maintenance on each sub - battery pack. Here, the sub - battery pack is composed of the sub - support frame and at least two large - capacity batteries arranged along the x - direction fixed on it.

[0009] Furthermore, each sub - support frame is a rectangular frame, and its structure is relatively stable compared with the U - shaped frame.

[0010] Furthermore, the battery pack support frame further includes at least two connecting pieces; both ends of each connecting piece are respectively connected to the side beams on the same side of two rectangular frames through screws.

[0011] Further, the two opposite side beams of the sub-support frame extending in the x-direction are I-beams, and the space between the upper flange and the lower flange of the I-beam serves as the accommodation space for the explosion venting manifold and the heat exchange pipeline of the battery pack.

[0012] The explosion venting manifold and the heat exchange pipeline are directly embedded in the space between the upper flange and the lower flange of the first beam, without occupying additional space, enabling the battery pack to have a high energy density.

[0013] The second aspect of the present utility model further provides a battery pack, including the above-mentioned battery pack support frame and a plurality of high-capacity batteries; at least two high-capacity batteries arranged in the x-direction are fixed on each of the n sub-support frames of the battery pack support frame, forming n sub-battery packs.

[0014] Further, the high-capacity battery includes a housing and a plurality of single cells arranged in the same direction inside the housing; the housing is provided with a shared chamber; the inner cavity of the shared chamber is communicated with the inner cavities of all the single cells; avoidance holes are provided on the top plate of the housing corresponding to the polarity terminals of each single cell; the polarity terminals of each single cell extend out of the avoidance holes, and the area of the housing top plate corresponding to the avoidance holes is fixedly sealed with the single cell housing. The present utility model places a plurality of single cells in a housing with a shared chamber, and uses the fact that the shared chamber is communicated with the inner cavities of the single cells located inside the housing, reducing the differences between the single cells, improving the consistency between the single cells to a certain extent, and thus improving the cycle life of the high-capacity battery to a certain extent.

[0015] Further, the housing is also provided with an explosion venting pipe assembly communicated with the shared chamber; each sub-battery pack includes an explosion venting manifold; the explosion venting manifold is communicated with the explosion venting pipe assemblies of each high-capacity battery in the sub-battery pack; the explosion venting manifolds of adjacent sub-battery packs are connected by a hose.

[0016] An explosion venting pipe assembly communicated with the shared chamber is provided on the housing of each high-capacity battery. When forming the battery pack, the explosion venting pipe assemblies of each high-capacity battery are communicated with the explosion venting manifold, and the thermal runaway flue gas is discharged through the explosion venting pipe assembly and the explosion venting manifold in sequence, reducing the risk of thermal runaway flue gas dispersion and improving the use safety of the battery pack. At the same time, the explosion venting manifolds of adjacent sub-battery packs are connected by a hose. During the maintenance process, the connection between the explosion venting manifolds of the two sub-battery packs can be maintained without being disconnected, facilitating maintenance.

[0017] Further, the explosion venting manifold is embedded in the inner space between the upper flange and the lower flange of the two opposite side beams of the sub-support frame extending in the x-direction. The explosion venting manifold is directly embedded in the space between the upper flange and the lower flange of the first beam, without occupying additional space, enabling the battery pack to have a high energy density.

[0018] Further, each sub-battery pack includes a heat exchange pipeline, and the heat exchange pipeline includes a liquid inlet manifold and a liquid return manifold;

[0019] The large-capacity battery further includes heat transfer tubes; clamping portions are provided at the parts where the polar terminals of each single battery extend out of the avoidance holes; the heat transfer tubes are fixed on the clamping portions of the polar terminals of each single battery, and the heat transfer tubes are insulated from the polar terminals of each single battery;

[0020] The liquid inlet ends of the heat transfer tubes of the large-capacity batteries in the sub-battery packs are all communicated with the liquid inlet manifold, and the liquid outlet ends of the heat transfer tubes of the large-capacity batteries are all communicated with the liquid return manifold;

[0021] The liquid inlet manifolds of adjacent sub-battery packs are connected by hoses; the liquid return manifolds of adjacent sub-battery packs are connected by hoses.

[0022] The heat transfer tubes are in direct contact with the polar terminals of each single battery, and a cooling medium is introduced into each heat transfer tube through the liquid inlet manifold to timely conduct heat. This heat dissipation method realizes the balanced heat dissipation of each single battery in the large-capacity battery and improves the use safety of the large-capacity battery. At the same time, the liquid inlet manifolds of adjacent sub-battery packs are connected by hoses, and the liquid return manifolds of adjacent sub-battery packs are connected by hoses. During the maintenance process, the liquid inlet manifolds and the liquid return manifolds of the two sub-battery packs can also be kept connected without disconnecting, which is convenient for maintenance.

[0023] Furthermore, the liquid inlet manifold and the liquid return manifold are embedded in the outer space between the upper and lower flanges of the opposite two side beams extending in the x direction of the sub-support frame. The liquid inlet manifold and the liquid return manifold are directly embedded in the space between the upper and lower flanges of the first beam, without occupying extra space, and the battery pack can also have a high energy density. Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of the battery pack support frame of Embodiment 1;

[0025] Figure 2 It is a schematic structural diagram of the sub-support frame of Embodiment 1;

[0026] Figure 3 It is a schematic structural diagram of another battery pack support frame;

[0027] Figure 4 It is an exploded structural diagram of the sub-support frame of Embodiment 1;

[0028] Figure 5 It is a schematic structural diagram of the battery pack of Embodiment 2;

[0029] Figure 6 It is a schematic structure of the large-capacity battery of Embodiment 2 Figure 1 ;

[0030] Figure 7Cross-sectional view of the high-capacity battery in Example 2;

[0031] Figure 8 Explosion diagram of the outer shell of the high-capacity battery in Example 2;

[0032] Figure 9 Structural diagram of the cylinder assembly in Example 2;

[0033] Figure 10 Structural schematic of the high-capacity battery in Example 2 Figure 2 ;

[0034] Figure 11 Structural diagram of the high-capacity battery with a bracket assembly and an insulating protective cover in Example 2;

[0035] Figure 12 Structural diagram of the high-capacity battery with a bracket assembly in Example 2;

[0036] Figure 13 Structural diagram of the bracket assembly in Example 2;

[0037] Figure 14 Explosion diagram of the bracket assembly in Example 2;

[0038] Figure 15 Partial structural diagram of the bracket assembly in Example 2;

[0039] Figure 16 Structural diagram of another bracket assembly;

[0040] Figure 17 Structural diagram of the third type of bracket assembly;

[0041] Figure 18 Structural diagram of the high-capacity battery with the third type of bracket assembly;

[0042] Figure 19 Structural diagram of the sub-battery pack in Example 2;

[0043] Figure 20 Structural diagram of the connection between the high-capacity battery and the explosion relief busbar in Example 2;

[0044] Figure 21 Schematic diagram of the assembly process of the sub-battery pack in Example 2;

[0045] Figure 22 Schematic diagram of the assembly or maintenance process of the energy storage device in Example 2;

[0046] The reference numerals in the figure are:

[0047] 1. Sub - support frame; 11. U - shaped frame; 111. Second beam; 112. Third beam; 12. First beam; 13. Connecting column; 2. Connector; 3. High - capacity battery; 31. Outer shell; 311. Cylinder assembly; 3111. Cylinder; 3112. Boss; 312. End - plate assembly; 32. Single - cell battery; 33. Electrolyte sharing chamber; 34. Gas sharing chamber; 35. Explosion - venting pipe assembly; 36. Terminal post; 37. Terminal - post adapter; 38. Avoidance hole; 39. Bracket assembly; 40. Outer - shell bottom plate; 41. Outer - shell top plate; 42. Heat - transfer pipe; 43. Insulating protective cover; 431. Slit; 343. Channel; 2110. Support rib; 21. Support member; 220. L - shaped bracket; 221. First bracket; 222. Second bracket; 223. L - shaped support rod; 224. Connecting rod; 226. Positioning hole; 212. Support plate; 5. Explosion - venting manifold; 6. Liquid - inlet manifold; 7. Liquid - return manifold. Detailed implementation manners

[0048] To make the above - mentioned objects, features and advantages of the present utility model more obvious and understandable, the following will describe in detail the specific implementation manners of the present utility model with reference to the accompanying drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0049] In the following description, many specific details are set forth to facilitate a thorough understanding of the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0050] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "top, bottom" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present utility model. In addition, the terms "first, second, third, fourth, etc." are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0051] The present utility model provides a battery pack support frame, which is used to be placed inside the energy storage device box body to support each large-capacity battery that constitutes the battery pack; the large-capacity battery described here can be a battery pack or a battery module in the prior art, or a large-capacity battery disclosed in Chinese patents CN220797038U, CN117878492A, CN220324596U, and CN118299739A.

[0052] Under normal circumstances, the battery pack is in a cuboid structure, and the corresponding battery pack support frame is a rectangular frame. For the convenience of description below, the length direction of the battery pack support frame is defined as the x direction, the width direction is defined as the y direction, and the height direction is defined as the z direction.

[0053] Each large-capacity battery is arranged along the x direction and fixed on the battery pack support frame. When the number of large-capacity batteries is large, it is necessary to increase the size of the battery pack support frame in the x direction; when the size of the battery pack support frame in the x direction is greater than the distance between the energy storage device and the adjacent device in the energy storage power station, during maintenance, the battery pack cannot be completely withdrawn from the energy storage device, making the maintenance work unable to be completed smoothly.

[0054] It should be noted that the above adjacent device can be another energy storage device, or other devices or apparatuses adjacent to the energy storage device.

[0055] To overcome the above problems, in the present utility model, in the x direction, the battery pack support frame is split into at least two sub-support frames. The specific number of sub-support frames can be determined according to the distance between the energy storage device and the adjacent device in the energy storage power station. At least it is necessary to ensure that the size of each sub-support frame in the x direction is less than the distance between the energy storage device and the adjacent device in the energy storage power station.

[0056] A plurality of large-capacity batteries arranged along the x direction are fixed on each sub-support frame to form a sub-battery pack; the sub-support frames are detachably connected to each other. When maintenance is required, the sub-support frames can be disassembled to perform maintenance on each sub-battery pack.

[0057] The present utility model also provides a battery pack having the above battery pack support frame.

[0058] The present utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0059] Embodiment 1

[0060] As Figure 1 shown, it is a schematic structural diagram of the battery pack support frame of this embodiment; this embodiment takes the support frame being formed by splicing two sub-support frames 1 as an example.

[0061] From Figure 1 andFigure 2 As can be seen, in this embodiment, both of the two sub-support frames 1 are rectangular frames, and the two rectangular frames are detachably connected. For example, they can be connected by plugging, or they can be connected by the connecting member 2. Specifically, both ends of each connecting member 2 can be respectively connected to the side beams on the same side of the two rectangular frames by screws. The shape of the connecting member 2 here is related to the shape of the part to be connected. If the part to be connected is flat, such as Figure 1 shown, then a plate-shaped connecting member 2 can be used for connection; if the part to be connected is tubular, then a column-shaped connecting member 2 can be used for connection. Specifically, both ends of the column-shaped connecting member 2 can be respectively inserted into the two tubular parts to be connected. If the part to be connected is columnar, then a tubular connecting member 2 can be used for connection. Specifically, both ends of the tubular connecting member 2 can be respectively sleeved outside the two columnar parts to be connected.

[0062] In some other embodiments, the sub-support frame 1 can also adopt a U-shaped frame, and the open ends of the two U-shaped frames are connected to each other through the connecting member 2, such as Figure 3 shown, but compared with this embodiment, the support strength of each independent sub-support frame 1 is weaker.

[0063] In order to facilitate fixing the large-capacity battery 3 on the sub-support frame 1, as can be seen from Figure 4 this embodiment designs each sub-support frame 1 as a split structure, including a U-shaped frame 11 and a first beam 12 fixed at the opening end of the U-shaped frame 11. The assembly of the large-capacity battery 3 and the sub-support frame 1 is realized through the opening end of the U-shaped frame 11.

[0064] The U-shaped frame 11 and the first beam 12 can be fixedly connected through two connecting columns 13.

[0065] For the convenience of description, in this embodiment, the U-shaped frame 11 is split into three parts, which are respectively defined as a second beam 111 and two third beams 112 respectively fixed at both ends of the second beam 111 (the two third beams 112 are the opposite two side beams in the U-shaped frame 11); among them, the U-shaped frame 11 can be an integral part, that is, the second beam 111 and the two third beams 112 are an integral part; the U-shaped frame 11 can also be a split part, that is, the second beam 111 and the two third beams 112 are independent parts, and are assembled into the U-shaped frame 11 by welding or screwing later.

[0066] In order to improve the structural strength of the entire sub-support frame 1, in this embodiment, the first beam 12 and the second beam 111 opposite to the first beam 12 adopt I-beams (see Figure 2 and Figure 4 ), and the upper flange of the I-beam serves as the fixing surface for the large-capacity battery 3. The third beam 112 adopts square steel.

[0067] In some other embodiments, square steel can also be selected for the first beam 12 and the second beam 111. Since the supporting strength of square steel is weak, in order to improve the supporting strength of the entire sub-supporting frame 1, it is necessary to add a supporting structure member in the middle of the frame. However, after adding the supporting structure member, the distance between the large-capacity batteries 3 on both sides of the supporting structure member will be relatively large, resulting in a relatively small energy density of the entire sub-battery pack.

[0068] In this embodiment, the first beam 12 and the second beam 111 are made of I-shaped steel, and the upper flange is used as the fixing surface for the large-capacity battery 3. The upper flange is the maximum load-bearing surface of the I-shaped steel, so that the entire sub-supporting frame 1 has good supporting strength and there is no need to add a supporting structure member. Furthermore, the gaps between all the large-capacity batteries 3 can be made equal (with a small gap), improving the energy density of the entire sub-battery pack.

[0069] In addition, when each sub-battery pack includes an explosion vent manifold 5 and a heat exchange pipeline, in this embodiment, the inner space between the upper flange and the lower flange of the first beam 12 is used as the accommodation space for the explosion vent manifold 5. At the same time, through holes are opened in the first beam 12 so that the outlet end of the explosion vent manifold 5 can pass through (see Figure 2 ), and the outer space between the upper flange and the lower flange of the first beam 12 is used as the accommodation space for the heat exchange pipeline.

[0070] Embodiment 2

[0071] This embodiment is a battery pack, and its structure is as shown in Figure 5 , including the battery pack support frame in Embodiment 1 and a plurality of large-capacity batteries 3 fixed on the battery pack support frame. Figure 5 Only some of the large-capacity batteries 3 are schematically shown in

[0072] For the structure of the large-capacity battery 3 in this embodiment, reference can be made to Figure 6 and Figure 7 . It can be seen from the figure that the large-capacity battery 3 in this embodiment includes a housing 31 and a plurality of single cells 32 arranged in the housing 31.

[0073] The single cells 32 in this embodiment are square shell batteries, and the number is 13. In other embodiments, the number and type of the single cells 32 can be adjusted according to actual requirements. The inner cavities of the single cells 32 include an electrolyte area and a gas area.

[0074] In this embodiment, on the bottom plate 40 of the housing, an electrolyte sharing chamber 33 is provided along the x direction, and the inner cavity of the electrolyte sharing chamber 33 is communicated with the electrolyte areas of the inner cavities of the single cells 32.

[0075] On the top plate 41 of the housing, a gas sharing chamber 34 is provided along the x direction, and the gas sharing chamber 34 covers the gas ports on the tops of the single cells 32.

[0076] It should be noted that the gas port here has the following two meanings:

[0077] 1) The gas port is a through hole directly opened on the upper cover plate of the single battery 32 and penetrating through the inner cavity of the single battery 32;

[0078] At this time, the inner cavity of the gas sharing chamber 34 is communicated with the gas areas of the inner cavities of the respective single batteries 32 through this gas port. Based on the gas sharing chamber 34, the gas areas of the respective single batteries 32 can be communicated to achieve gas balance, enabling the gas sharing of each single battery 32 to ensure the consistency of each single battery 32, and improving the cycle life of the large-capacity battery 3 to a certain extent; when any single battery 32 undergoes thermal runaway, the flue gas in the inner cavity of the single battery 32 enters the gas sharing chamber 34 and is discharged through the gas sharing chamber 34, improving the safety of the large-capacity battery 3.

[0079] 2) The gas port is a pressure relief port or explosion-proof port provided on the upper cover plate of the single battery 32, and a pressure relief membrane is provided at the pressure relief port or explosion-proof port;

[0080] At this time, the gas sharing chamber 34 is used as the pressure relief channel 343. When the pressure relief membrane at the gas port of any single battery 32 is broken by the flue gas in the inner cavity, the inner cavity of the single battery 32 is communicated with the gas sharing chamber 34, and the internal flue gas is discharged through the gas sharing chamber 34, improving the safety of the large-capacity battery 3.

[0081] In some other embodiments, only the electrolyte sharing chamber 33 or the gas sharing chamber 34 may be provided, or a gas-liquid sharing chamber may be provided on the side wall of the outer shell 31 (parallel to the xz plane) along the x direction, and the inner cavity of the gas-liquid sharing chamber is communicated with the electrolyte areas and gas areas of the inner cavities of the respective single batteries 32.

[0082] As Figure 8 shown, it is a schematic explosion structure diagram of the outer shell 31 of this embodiment. The outer shell 31 is disassembled into a cylindrical component 311 with open ends at both ends and an end plate component 312 covering the open ends of the cylindrical component 311. The structure of the cylindrical component 311 is as Figure 9 shown, including a cylinder 3111 and two bosses 3112 for forming the electrolyte sharing chamber 33; both ends of the cylinder 3111 are open ends; the two bosses 3112 are located on the inner bottom surface of the cylinder 3111, have the same length as the cylinder 3111, extend along the x direction and are arranged in the y direction. The top surface of the boss 3112 is the support surface of each single battery 32. In the y direction, a liquid channel is formed between the two bosses 3112 as the electrolyte sharing chamber 33. The above-mentioned cylindrical component 311 can be integrally formed by an aluminum extrusion process.

[0083] In some other embodiments, the electrolyte sharing chamber 33 can also be directly formed on the bottom plate of the cylinder body 3111 by protruding the bottom plate of the cylinder body 3111 away from the top plate of the cylinder body 3111; or a pipe section can be arranged outside the bottom plate of the cylinder body 3111, and the inner cavity of the pipe section is used as the electrolyte sharing chamber 33 (through holes need to be opened on the pipe wall and the bottom plate of the cylinder body 3111).

[0084] In some other embodiments, the outer shell 31 includes a cylinder body with openings at both the upper and lower ends, and an upper cover plate and a lower cover plate respectively covering the upper and lower open ends of the cylinder body; the electrolyte sharing chamber 33 is arranged on the lower cover plate, and the gas sharing chamber 34 is arranged on the upper cover plate; the lower cover plate and the cylinder body can also be an integral part.

[0085] In this embodiment, the top plate 41 of the outer shell of the large-capacity battery 3 is provided with avoidance holes 38 through which the polar terminals of each single battery 32 can extend; the polar terminals of each single battery 32 extend out of the corresponding avoidance holes 38, and the area of the outer shell 31 around the avoidance holes 38 is fixedly sealed with the housing of the single battery 32.

[0086] It should be noted that the polar terminal of the single battery 32 here can be the pole column 36 of the single battery 32. If it is to avoid that the pole column 36 of the single battery 32 cannot smoothly extend out of the avoidance hole 38 or the height of extending out of the avoidance hole 38 does not meet the set requirements, a pole column adapter 37 can also be connected to the pole column 36 of the single battery 32, and the overall structure of the cooperation of the pole column 36 of the single battery 32 and the pole column adapter 37 is used as the polar terminal of the single battery 32 (as Figure 7 shown).

[0087] As Figure 10 shown, this embodiment of the large-capacity battery 3 further includes a heat transfer tube 42. A through groove is opened at the position where the polar terminal of the single battery 32 extends out of the avoidance hole 38 as the clamping part of the heat transfer tube 42; the heat transfer tube 42 is fixed in the through groove. When the temperature of the large-capacity battery 3 is higher than the set threshold, the large-capacity battery 3 is cooled by introducing a heat transfer medium with a lower temperature into the heat transfer tube 42; when the temperature of the large-capacity battery 3 is lower than the set threshold, the large-capacity battery 3 is heated by introducing a heat transfer medium with a higher temperature into the heat transfer tube 42; by controlling the temperature of the heat transfer medium, it can be ensured that the large-capacity battery 3 always operates at the normal working temperature.

[0088] In order to prevent the condensation caused by the heat transfer tube 42 from causing safety problems, an insulating and sealing adhesive layer can also be laid on the top plate 41 of the outer shell in this embodiment. Part of the area of the polar terminals of each single battery 32 is covered by the insulating and sealing adhesive layer, and the electrical connection parts of the polar terminals of each single battery 32 extend out of the insulating and sealing adhesive layer and are connected to the electrical connector 2; the main part of the heat transfer tube 42 is covered by the insulating and sealing adhesive layer, and the liquid inlet end and the liquid outlet end of the heat transfer tube 42 extend out of the insulating and sealing adhesive layer for connection with the liquid cooling device.

[0089] Moreover, since the polar terminals of the single battery 32 are directly exposed to the external environment, there are significant safety hazards due to the electrification of the polar terminals of the single battery 32 during use. Based on this, as Figure 11 shown, in this embodiment, an insulating protective cover 43 is provided on the top of the large-capacity battery 3, thereby providing insulation protection for the polar terminals of the single battery 32, avoiding potential safety hazards that may occur when the polar terminals of the single battery 32 are exposed during the operation of the large-capacity battery 3, and also avoiding the problem that some foreign objects in the external environment fall into the position of the polar terminals of the single battery 32, causing a short circuit of the large-capacity battery 3, and improving the safety of the large-capacity battery 3.

[0090] It should be noted that if the insulating protective cover 43 completely wraps the polar terminals of the single battery 32, it will be difficult to electrically connect such large-capacity batteries 3. Therefore, in this embodiment, a slit 431 is opened on the side wall of the insulating protective cover 43 parallel to the xz plane. Through this slit 431, the electrical connector can be connected to the polar terminals of the single battery 32, thereby achieving electrical connection.

[0091] It should also be noted that channels for the liquid inlet end and the liquid outlet end of the heat transfer tube 42 to extend out need to be opened on the side wall of the insulating protective cover 43.

[0092] As Figure 11 shown, in this embodiment, a burst pipe assembly 35 communicating with the shared chamber is further provided on the outer shell 31.

[0093] Combined with Figure 5 and Figure 12 it can be seen that each large-capacity battery 3 in this embodiment is fixed on the battery pack support frame through its respective bracket assembly 39.

[0094] The structure of the bracket assembly 39 of the large-capacity battery 3 in this embodiment is as Figure 13 shown. It can be seen from the figure that in this embodiment, two mutually parallel support ribs 2110 are used as the support members 21; an L-shaped plate is used as the L-shaped bracket.

[0095] In some other embodiments, the number of the support ribs 2110 can be adjusted according to actual needs.

[0096] The first plates (the plates parallel to the yz plane) of the two L-shaped plates serve as the first brackets 221 and are respectively connected to the ends on the same side of the two support ribs 2110. The second plates (the plates parallel to the xy plane) of the two L-shaped plates serve as the second brackets 222 and are respectively used to be fixed to the opposite frames of the battery cluster support frame. The first plate and the second plate can be an integral part or a split part.

[0097] In order to cooperate with the bracket assembly 39, in this embodiment, a channel 343 is opened in the boss 3112 of the cylinder assembly 311 along the x direction (seeFigure 9 )。

[0098] Insert a support rib 2110 with a length greater than that of the outer shell 31 and a cross-section adapted to the cross-section of the channel 343 into the channel 343, and ensure that both ends of the support rib 2110 extend out of both ends of the channel 343 (for reference, see Figure 12 )。

[0099] The support rib 2110 can be of a solid structure or a hollow structure, and its cross-section is preferably adapted to the channel 343. For example, it can be a rectangular cross-section, a trapezoidal cross-section, or other polygonal cross-sections, which will not be listed one by one here.

[0100] Such as Figure 14 shown, in this embodiment, a support rib 2110 with a relatively simple rectangular cross-section is selected. Then, the cross-section of the corresponding channel 343 is also preferably rectangular. Using the support rib 2110 with a rectangular cross-section to support the large-capacity battery 3 has better support stability. In addition, as can be seen from Figure 14 , in this embodiment, the support rib 2110 is of a hollow structure to facilitate connection with the L-shaped plate.

[0101] In order to ensure the support strength of the support rib 2110, in this embodiment, a metal material is selected as the material of the support rib 2110, and a thermoplastic tube can be sleeved on the support rib 2110 to insulate between the support rib 2110 and the large-capacity battery 3.

[0102] In some other embodiments, an insulating material can be directly selected to prepare the support rib 2110, but compared with this embodiment, its support strength is difficult to guarantee.

[0103] Since in the assembly process of this embodiment, the support rib 2110 needs to be inserted into the channel 343 first, and then the L-shaped plates are fixed at both ends of the support rib 2110 extending out of the channel 343. Therefore, in this embodiment, the support rib 2110 and the L-shaped plate are separate parts.

[0104] Combined with Figure 15 it can be seen that in this embodiment, a connecting rod 224 extending in the x direction is provided on the first plate (the first bracket 221) of the L-shaped plate for connecting with the support rib 2110. Corresponding positioning holes 226 are provided on the support rib 2110 and the connecting rod 224.

[0105] During specific assembly, insert the support rib 2110 into the channel 343, and then insert the connecting rod 224 into the support rib 2110, and fix the two by passing a screw or a pin through the positioning hole 226.

[0106] In some other embodiments, the connecting rod 224 can be connected to the support rib 2110 by welding. However, in order to increase the energy density, the distance between the first plate and the high-capacity battery 3 is small, resulting in a small operating space and great welding difficulty.

[0107] In some other embodiments, the support rib 2110 and the L-shaped plate can be an integral part. The high-capacity battery 3 can be directly placed on the support rib 2110 for support. Correspondingly, in order to improve the support stability, the number of support ribs 2110 can be increased.

[0108] From Figure 15 It can also be seen that in this embodiment, a hollowed-out portion is provided on the first plate, and the portions on both sides of the hollowed-out portion are respectively connected to the two support ribs 2110. By providing the hollowed-out portion, on the one hand, the weight of the L-shaped plate is reduced, thereby reducing its impact on the normal use of the battery cluster support frame. On the other hand, the hollowed-out portion can allow some functional structures on the high-capacity battery 3 to protrude. For example, it can allow the explosion vent tube assembly 35 on the high-capacity battery 3 to protrude.

[0109] In this embodiment, a long hole is opened on the second plate (the second bracket 222) of the L-shaped plate; the battery cluster support frame is fixed by inserting a screw into the long hole. The setting of the long hole can compensate for the dimensional error of the high-capacity battery 3 in the x direction and ensure the reliability of the connection.

[0110] In some other embodiments, as Figure 16 shown, the L-shaped bracket is two L-shaped support rods 223; that is, two L-shaped support rods 223 form an L-shaped bracket;

[0111] The first brackets 221 of the two L-shaped support rods 223 are respectively fixed to the two ends of the same support rib 2110 in a detachable manner, and the first brackets 221 of the other two L-shaped support rods 223 are respectively fixed to the two ends of another support rib 2110 in a detachable manner.

[0112] In some other embodiments, as Figure 17 and Figure 18 shown, the support member 21 is a support plate 212 adapted to the bottom shape of the high-capacity battery 3 to support the high-capacity battery 3. In order to reduce the weight of the support plate 212, weight-reducing holes can be opened on the support plate 212. However, it should be noted that the opening of the weight-reducing holes is based on the premise of not affecting the support strength. There are two L-shaped brackets, both of which are L-shaped plates; the first bracket 221 of one L-shaped plate is connected to one end of the support plate 212, and the first bracket 221 of the other L-shaped plate is connected to the other end of the support plate 212. Different from the structure of the high-capacity battery 3 in this embodiment, there is no need to open a channel 343 on the boss 3112 of the cylinder assembly 311.

[0113] In some other embodiments, a large-capacity battery 3, battery pack or battery module of any structural form in the prior art can be selected. That is to say, the battery pack support frame in this embodiment is not only applicable to the large-capacity battery 3 described in this embodiment, but can be applicable to a large-capacity battery 3, battery pack or battery module of any structural form in the prior art. If the outer shell bottom plate 40 of the large-capacity battery 3 in the prior art does not have a channel 343 for the support rib 2110 to penetrate, the large-capacity battery 3 can be directly placed on the plurality of support ribs 2110 for support. It is also possible to use Figure 17 the shown bracket assembly 39 to fix the corresponding large-capacity battery 3, battery pack or battery module on the battery pack support frame.

[0114] Such as Figure 19 and Figure 20 shown, is a schematic structural diagram of each sub-battery pack in this embodiment; in this embodiment, each sub-battery pack includes an explosion relief manifold 5 and a heat exchange pipeline, wherein the heat exchange pipeline includes an inlet liquid manifold 6 and a return liquid manifold 7; in order to facilitate the display of the explosion relief manifold, Figure 20 only a schematic diagram of the connection between two large-capacity batteries and the explosion relief manifold 5 is shown.

[0115] Each sub-battery pack includes 13 large-capacity batteries 3, and the explosion relief tube assemblies 35 of the 13 large-capacity batteries 3 are all connected to the explosion relief manifold 5; the explosion relief manifold 5 is embedded in the inner space between the upper flange and the lower flange of the first beam 12; the inlet liquid manifold 6 and the return liquid manifold 7 are embedded in the outer space between the upper flange and the lower flange of the opposite side beams of the sub-support frame 1.

[0116] The assembly of each sub-battery pack in this embodiment can be achieved through the following process:

[0117] First, fix the corresponding large-capacity battery 3 bracket assembly 39 on each large-capacity battery 3, and connect the explosion relief tube assemblies 35 of all large-capacity batteries 3 with the explosion relief manifold 5, such as Figure 20 shown;

[0118] Second, as Figure 21 shown, preliminarily fix the first beam 12 with connection columns 13 fixed at both ends to the L-shaped brackets (the left L-shaped brackets in the figure, that is, the L-shaped brackets close to the first beam 12) of all large-capacity battery 3 bracket assemblies 39 (can be fixed with screws), and ensure that the explosion relief manifold 5 is embedded in the inner space between the upper flange and the lower flange of the first beam 12.

[0119] Third, along Figure 21Move the U-shaped frame 11 in the direction indicated by the arrow c until the connecting column 13 is inserted into the third beam 112, and the L-shaped brackets of all the large-capacity battery 3 bracket assemblies 39 (the L-shaped bracket on the right side in the figure, i.e., the L-shaped bracket close to the second beam 111) are located on the upper flange of the second beam 111, indicating that the movement is in place;

[0120] Fourth, fix the connecting column 13 and the third beam 112 with screws, fix the right L-shaped bracket to the second beam 111 with screws, and further fix the left L-shaped bracket to the first beam 12 with screws; then connect the liquid inlet manifold pipe 6 and the liquid return manifold pipe 7 to the heat transfer pipes 42 of each large-capacity battery 3, and embed them in the outer space between the upper flange and the lower flange of the first beam 12.

[0121] When using the battery pack of this embodiment to assemble an energy storage device, two sub-battery packs can be assembled into a battery pack first. Specifically, the support frames of the two sub-battery packs can be connected and fixed by using the connecting member 2 first. Then, the explosion relief manifold pipes 5, the liquid inlet manifold pipes 6, and the liquid return manifold pipes 7 of the two sub-battery packs can be connected by using three relatively long hoses respectively; the length of the hoses should ensure that the process of overhauling and disassembling the sub-battery packs does not affect the sealing performance of the connection parts.

[0122] After that, as Figure 22 shown, push the battery pack as a whole in the x direction into the box body of the energy storage device.

[0123] During the overhaul process, for each battery pack, it can be disassembled into two sub-battery packs for overhaul. Since the dimension of the factor support frame in the x direction is smaller than the distance between the energy storage device of the energy storage power station and the adjacent device, it can be pulled out of the box body of the energy storage device and overhauled in this space.

Claims

1. A battery pack support frame is used to be placed inside the box body of an energy storage device to support multiple large-capacity batteries; it is characterized in that: It includes n sub-support frames, where n is an integer greater than 1; Each sub-support frame is used to fix at least two large-capacity batteries arranged in the x direction; In the x direction, adjacent sub-support frames are connected to each other in a detachable manner; and, in the x direction, the size of each sub-support frame is smaller than the spacing between the energy storage device and the adjacent device in the energy storage power station.

2. The battery pack support frame according to claim 1, wherein: Each sub-support frame is a rectangular frame.

3. The battery pack support frame according to claim 2, wherein: It also includes at least two connecting pieces; both ends of each connecting piece are respectively connected to the side beams on the same side of two rectangular frames by screws.

4. The battery pack support frame according to claim 2, characterized in that: The two opposite side beams of the sub-support frame extending in the x direction are I-beams, and the space between the upper flange and the lower flange of the I-beam is used as the accommodation space for the battery pack explosion venting manifold and the heat exchange pipeline.

5. A battery pack, characterized in that: It includes the battery pack support frame described in any one of claims 1 to 4 and a plurality of large-capacity batteries; At least two large-capacity batteries arranged in the x direction are fixed on the n sub-support frames of the battery pack support frame to form n sub-battery packs.

6. The battery pack according to claim 5, wherein: The large-capacity battery includes a housing and a plurality of single batteries arranged in the same direction inside the housing; the housing is provided with a shared chamber; the inner cavity of the shared chamber is communicated with the inner cavities of all single batteries; avoiding holes are opened on the top plate of the housing corresponding to the polarity terminals of each single battery; the polarity terminals of each single battery extend out of the avoiding holes, and the area of the housing top plate corresponding to the avoiding holes is fixedly sealed with the single battery housing.

7. The battery pack according to claim 6, wherein: The housing is provided with an explosion venting pipe assembly communicated with the shared chamber; Each sub-battery pack includes an explosion venting manifold; The explosion venting manifold is communicated with the explosion venting pipe assemblies of each large-capacity battery in the sub-battery pack; the explosion venting manifolds of adjacent sub-battery packs are connected by hoses.

8. The battery pack according to claim 7, wherein: The explosion venting manifold is embedded in the inner space between the upper flange and the lower flange of the two opposite side beams of the sub-support frame extending in the x direction.

9. The battery pack according to claim 6, characterized in that: Each sub-battery pack includes a heat exchange pipeline, where the heat exchange pipeline includes a liquid inlet manifold and a liquid return manifold; The large-capacity battery further includes a heat transfer pipe; a clamping part is provided at the part where the polarity terminal of each single battery extends out of the avoiding hole; the heat transfer pipe is fixed on the clamping part of the polarity terminal of each single battery, and the heat transfer pipe is insulated from the polarity terminal of each single battery; The liquid inlet ends of the heat transfer pipes of each large-capacity battery in the sub-battery pack are all communicated with the liquid inlet manifold, and the liquid outlet ends of the heat transfer pipes of each large-capacity battery are all communicated with the liquid return manifold; The liquid inlet manifolds of adjacent sub-battery packs are connected by hoses; the liquid return manifolds of adjacent sub-battery packs are connected by hoses.

10. The battery pack according to claim 9, characterized in that: The liquid inlet manifold and the liquid return manifold are embedded in the outer space between the upper flange and the lower flange of the two opposite side beams of the sub-support frame extending in the x direction.

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