Large-capacity battery assembly, barrel assembly, case bottom plate assembly, insulating support component, and battery pack assembly

Abstract

The present invention relates to the field of batteries, and in particular to a large-capacity battery assembly, a barrel assembly, a case bottom plate assembly, an insulating support component, and a battery pack assembly. The large-capacity battery assembly comprises a large-capacity battery and the insulating support component; the large-capacity battery comprises a case and a plurality of battery cells arranged in the case; and the insulating support component is fixed to a case bottom plate, is insulated from the case bottom plate, and serves as a bottom support member for the large-capacity battery. The large-capacity battery can be reliably fixed on a support frame on the basis of the insulating support component.

Description

Large-capacity battery components, cylinder components, shell bottom plate components, insulating support components and battery pack components Technical Field

[0001] The present invention belongs to the field of batteries, and specifically relates to a large-capacity battery assembly, a barrel assembly, a shell bottom plate assembly, an insulating support member and a battery pack assembly. Background Art

[0002] At present, with the continuous growth of global energy demand and the improvement of environmental protection awareness, energy storage technology has gradually become one of the important means to solve energy problems.

[0003] Energy storage containers, as a new type of energy storage device, offer advantages such as portability, flexibility, and high efficiency, and are widely used in power systems, transportation, aerospace, and other fields. Existing energy storage containers on the market consist of a container, a support frame within the container, and multiple high-capacity batteries fixed to the support frame.

[0004] How to reliably fix multiple large-capacity batteries on a support frame is a technical problem that urgently needs to be solved.

[0005] Summary of the Invention

[0006] The present invention aims to provide a large-capacity battery assembly, a large-capacity battery barrel assembly, a large-capacity battery housing bottom plate assembly, an insulating support member, and a battery pack assembly. The insulating support member can reliably secure the large-capacity battery to a support frame.

[0007] A first aspect of the present invention provides a large-capacity battery assembly, comprising a large-capacity battery and an insulating support member; the large-capacity battery comprises an outer shell and a plurality of single cells arranged in the outer shell; the insulating support member is fixed to the bottom plate of the outer shell, insulated from the bottom plate of the outer shell, and serves as the bottom support member of the large-capacity battery.

[0008] Furthermore, the insulating support member is an insulating support rod; multiple single cells are connected in parallel; the outer shell includes a first barrel assembly and a first end plate and a second end plate respectively sealed and fixed to the two opposite open ends of the first barrel assembly, the first barrel assembly includes a first barrel body and a fixing mechanism; the first barrel body is surrounded by the outer shell top plate, the outer shell bottom plate and the first barrel side plate; avoidance holes corresponding to the poles of each single cell are provided on the outer shell top plate; the outer shell bottom plate has a protrusion in the direction away from the outer shell top plate to form an electrolyte sharing chamber; the fixing mechanism includes two support blocks extending along the length direction of the first barrel body and respectively fixedly arranged on the outside of the outer shell bottom plate and on both sides of the electrolyte sharing chamber; a first hole for fixing the insulating support rod is provided in the support block and along the length direction of the support block; the insulating support rod is inserted into the first hole and fixed to the first barrel body.

[0009] A fixing mechanism is added to the bottom of the first barrel assembly to increase the size of the support surface at the bottom of the first barrel assembly in the y direction (the width direction of the first barrel assembly), so that a large-capacity battery with such a first barrel assembly can be placed stably; at the same time, a first hole for fixing the insulating support rod is opened in the fixing mechanism, and the insulating support rod is fixed to the first barrel assembly by inserting the insulating support rod into the first hole, and the two ends of the insulating support rod extend out of the end surface of the first barrel assembly, and the extended end is used as a support part fixed to the support frame of the energy storage box. When such large-capacity batteries are assembled into energy storage equipment, it is only necessary to fix the extended end to the support frame of the energy storage box, and the operation is simple and convenient.

[0010] In order to provide long-term and effective support for the large-capacity battery, the first hole is a through hole that penetrates the support block.

[0011] Furthermore, the first barrel body and the support block are a single piece, which can be integrally formed using an aluminum extrusion process. Compared to solutions that directly fix the insulating support rod to the first barrel assembly, the present invention uses an integrally formed support block with a first hole, and fixes the insulating support rod within the first hole. This provides a strong support structure and a long service life. Especially for structures where the first hole is a through hole, the contact area between the support rod and the first barrel assembly is maximized, providing the best support strength. Furthermore, the structural stability of the single piece is higher than that of the split piece, and it is also more convenient to process.

[0012] If the first barrel body and the support block are separate parts, then relative to the present invention, firstly, the connection strength between the support block and the first barrel body is weak, and the support block is easily separated from the first barrel body after a long period of use; secondly, if the support block is connected to the first barrel body by conventional welding or screw connection, the sealing of the connection part cannot be guaranteed. When such a first barrel assembly is applied to a large-capacity battery, it will cause the electrolyte inside the first barrel assembly to leak, or outside air to enter the first barrel assembly, causing the large-capacity battery to fail.

[0013] Furthermore, to ensure the stability of each battery cell within the first barrel assembly, a limit plate is provided within the first barrel body. The limit plate is located in the area surrounding the avoidance hole in the top plate of the housing and extends along the length of the first barrel assembly. It is used to limit the displacement of each battery cell in the height direction of the first barrel assembly. The first barrel body and the limit plate can also be integral.

[0014] To further optimize the structure of the first barrel assembly, a protrusion extending along the length of the first barrel assembly and protruding in the width direction is provided on the long edge of the outer shell top plate. This expands the area surrounding the avoidance hole in the outer shell top plate, facilitating sealing between the avoidance hole and the single cell housing. The first barrel body and the protrusion can also be formed as a single piece.

[0015] Furthermore, the top plate of the housing has a protrusion in a direction away from the bottom plate of the housing, forming a second channel as a gas chamber.

[0016] Furthermore, the above-mentioned barrel assembly for large-capacity batteries also includes an insulating sleeve sleeved in the first hole and a support rod sleeved in the insulating sleeve.

[0017] Furthermore, in order to facilitate the installation of the end plates at both ends of the first cylindrical body, a step structure is provided on the end surface of the open end of the first cylindrical body.

[0018] Furthermore, the shell can also adopt another structural form: the shell includes a second cylinder and a shell top plate and a shell bottom plate respectively sealed and fixed to the two opposite open ends of the second cylinder, the shell top plate is provided with avoidance holes that allow the polarity terminals of each single cell to extend out; the polarity terminals of each single cell extend out of the corresponding avoidance holes and the shell top plate area around the avoidance holes is fixedly sealed with the single cell shell; the shell bottom plate includes a flat plate and an electrolyte sharing chamber arranged on the flat plate, the electrolyte sharing chamber is used to connect the electrolyte area of ​​the inner cavity of each single cell in the large-capacity battery.

[0019] Furthermore, to improve the stability of the insulating support member for the large-capacity battery, the insulating support member includes two support beams extending along the length of the housing bottom plate and fixed to the housing bottom plate. The two support beams can be symmetrical to each other to further improve support stability.

[0020] Furthermore, a raised portion extending along the length of the flat plate is provided on the flat plate, and the electrolyte sharing chamber is a liquid storage channel opened on the raised portion and extending along the length of the flat plate; two support beams are respectively located on both sides of the raised portion and fixed to the bottom plate area of ​​the shell on both sides of the raised portion, so that the overall structure of this type of large-capacity battery is relatively regular and can also play a good supporting role.

[0021] Furthermore, the support beam has a U-shaped cross-section, which, compared to solid beams or hollow beams with rectangular cross-sections, facilitates its attachment to the support frame and the bottom plate of the energy storage box. Furthermore, it is lightweight and has low material costs, thereby reducing the weight and material costs of the entire large-capacity battery. The support beam bottom plate is detachably attached to the bottom plate of the outer shell.

[0022] Furthermore, the support beam bottom plate is fixed to the housing bottom plate by screws, which is simple to operate and has good connection reliability.

[0023] Furthermore, in order to improve the supporting strength, the support beam is made of metal material; in order to ensure the insulation between the support beam and the bottom plate of the shell, the insulating support member also includes an insulating pad; the insulating pad is fixed between the support beam and the bottom plate of the shell; on the screw, an insulating sleeve is provided on the part that contacts the support beam.

[0024] Furthermore, the housing base plate further includes ribs fixed to the housing base plate areas on both sides of the protrusion; the screw heads pass through the support beam base plate, the housing base plate, and the ribs to connect. By increasing the thickness of the housing base plate in the screw connection area, the reliability of the connection is improved.

[0025] Furthermore, the top plate of the housing is provided with an air flow channel extending along its length direction, serving as a gas chamber, and the gas chamber covers the gas port on the top of each single battery.

[0026] Furthermore, another insulating support structure can be employed. This type of insulating support structure includes a support member and at least one L-shaped bracket. The support member is positioned at the bottom of the high-capacity battery to support the high-capacity battery. The L-shaped bracket includes a first bracket and a second bracket, wherein the first bracket is parallel to the yz plane and the second bracket is parallel to the xy plane. The first brackets of the two L-shaped brackets are respectively fixed to the ends of the support member, and the second brackets of the two L-shaped brackets are respectively fixed to the side beams opposite the support frame. The support member of the insulating support structure is located on the bottom plate of the housing, and the L-shaped brackets are located on both sides of the first side plate of the housing.

[0027] The large-capacity battery is supported from the bottom by a supporting member, and the large-capacity battery is stably fixed on the supporting frame by L-shaped brackets fixed at both ends of the supporting member. The structure is simple and compact, and the stability is high.

[0028] Furthermore, the support member and the L-shaped bracket can be separate parts or integrated parts. When separate parts are used, the support member generally includes two first support ribs, and the corresponding shell bottom plate is provided with two support blocks extending along the length direction of the shell; a channel for fixing the first support ribs is opened in the support block and along the length direction of the support block, and the two first support ribs are respectively inserted into the corresponding channels to support the large-capacity battery.

[0029] The corresponding L-shaped brackets can be of the following two types:

[0030] Category 1: The L-shaped bracket is an L-shaped plate; the first bracket of one L-shaped plate is detachably fixed to one end of the two first support ribs, and the first bracket of the other L-shaped plate is detachably fixed to the other end of the two first support ribs.

[0031] The second category: The L-shaped bracket is two L-shaped support rods; the first brackets of the two L-shaped support rods are respectively fixed to the two ends of the same first support rib in a detachable manner, and the first brackets of the other two L-shaped support rods are respectively fixed to the two ends of another first support rib in a detachable manner.

[0032] When the support member and the L-shaped bracket are integral, the support member is typically a support plate that conforms to the bottom shape of the large-capacity battery to support the large-capacity battery. The corresponding L-shaped bracket is an L-shaped plate; the first bracket of one L-shaped plate is connected to one end of the support plate, and the first bracket of the other L-shaped plate is connected to the other end of the support plate. The first bracket of the L-shaped plate is also used to securely connect to the large-capacity battery.

[0033] When a support plate is used as the support member, a large-capacity battery is placed on the support plate, and an insulating gasket can be provided between the support plate and the bottom plate of the housing to ensure insulation between the insulating support member and the large-capacity battery.

[0034] A second aspect of the present invention provides a barrel assembly for a large-capacity battery. The structure of the barrel assembly is the same as the above-mentioned barrel assembly structure and will not be described in detail here.

[0035] The third aspect of the present invention provides a housing bottom plate assembly for a large-capacity battery, comprising a housing bottom plate and an insulating support member; the housing bottom plate comprises a flat plate and an electrolyte sharing chamber disposed on the flat plate, the electrolyte sharing chamber being used to connect the electrolyte areas of the inner cavities of each single cell in the large-capacity battery; the insulating support member is fixed to the housing bottom plate, insulated from the housing bottom plate, and serves as the bottom support member of the large-capacity battery. Adding an insulating support member to the housing bottom plate allows a large-capacity battery having such a housing bottom plate to be placed stably; at the same time, the insulating support member is insulated from the housing bottom plate. When assembling such a large-capacity battery into an energy storage device, it is only necessary to fix the insulating support member to the support frame of the energy storage box, without adding an insulating device between the two. The structure is simple and easy to assemble.

[0036] The fourth aspect of the present invention provides an insulating support member, which supports the large-capacity battery from the bottom of the large-capacity battery and stably fixes the large-capacity battery on the support frame through L-shaped brackets fixed at both ends of the support member. The structure is simple and compact and the stability is high.

[0037] A fifth aspect of the present invention provides a battery pack assembly, comprising a support frame and a large-capacity battery assembly fixed to the support frame via an insulating support member.

[0038] Furthermore, the support frame is a rectangular frame, including a U-shaped frame and a first beam fixed to an open end of the U-shaped frame in a detachable connection manner.

[0039] Furthermore, the U-shaped frame includes a second beam and a third beam respectively fixed to both ends of the second beam;

[0040] The first beam and the second beam are I-shaped steels, and the second bracket of the insulating support member is fixed on the upper wing plate of the I-shaped steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] FIG1 is a schematic structural diagram of a large-capacity battery;

[0042] Figure 2 is a schematic structural diagram of a large-capacity battery cylinder;

[0043] Figure 3 is a schematic diagram of the cylinder structure in Example 1;

[0044] Figure 4 is a schematic diagram of the end surface structure of the cylinder in Example 2;

[0045] Figure 5 is a schematic diagram of the cylinder structure in Example 3;

[0046] Figure 6 is a schematic diagram of the end surface structure of the cylinder in Example 3;

[0047] Figure 7 is a schematic diagram of the cylinder structure in Example 4;

[0048] Figure 8 is a schematic diagram of the cylinder structure in Example 5;

[0049] FIG9 is another schematic structural diagram of the cylinder in Example 5;

[0050] FIG10 is a schematic structural diagram of another large-capacity battery;

[0051] Figure 11 is a schematic diagram of the structure of the bottom plate of the housing for a large-capacity battery in Example 8;

[0052] FIG12 is a schematic diagram of a structure of an electrolyte sharing chamber in Example 8;

[0053] FIG13 is a schematic diagram of another structure of the electrolyte sharing chamber in Example 8;

[0054] FIG14 is a schematic diagram of a third structure of the electrolyte sharing chamber in Example 8;

[0055] FIG15 is a schematic diagram of a fourth structure of the electrolyte shared chamber in Example 8;

[0056] FIG16 is a schematic diagram of the specific structure of the bottom plate of the housing for a large-capacity battery according to Example 8;

[0057] FIG17 is a schematic structural diagram of the support beam in Example 8;

[0058] FIG18 is a cross-sectional view of the bottom plate of the housing for a large-capacity battery according to Example 8;

[0059] FIG19 is a schematic diagram of the specific structure of a housing bottom plate for a large-capacity battery in some embodiments;

[0060] FIG20 is a cross-sectional view of a bottom plate of a housing for a large-capacity battery in some embodiments;

[0061] FIG21 is a schematic structural diagram of a large-capacity battery in Example 9.

[0062] FIG22 is a schematic structural diagram of an insulating support member according to Example 10;

[0063] FIG23 is an exploded schematic diagram of the insulating support member of Example 10;

[0064] FIG24 is a schematic structural diagram of an L-shaped bracket in Example 10;

[0065] FIG25 is a schematic structural diagram of a large-capacity battery assembly according to Example 10;

[0066] FIG26 is a schematic diagram of a partial explosion of a large-capacity battery assembly according to Example 10;

[0067] FIG27 is a cross-sectional view of a large-capacity battery according to Example 10;

[0068] FIG28 is a cross-sectional view of a large-capacity battery assembly according to Example 10;

[0069] FIG29 is a cross-sectional view of the large-capacity battery assembly according to Example 10 from another angle;

[0070] FIG30 is a schematic diagram of the assembly process of a large-capacity battery assembly according to Example 10;

[0071] FIG31 is a schematic diagram of a portion of the structure of a battery cluster assembly according to Example 10;

[0072] Figure 32 is a schematic structural diagram of the support frame in Example 10;

[0073] FIG33 is a schematic structural diagram of the first beam and the second beam in Example 10;

[0074] FIG34 is a schematic diagram of the assembly process of the battery cluster assembly of Example 10;

[0075] FIG35 is a schematic diagram of a partial structure of a battery cluster assembly according to Example 10;

[0076] FIG36 is a schematic structural diagram of an insulating support member according to Example 11;

[0077] FIG37 is a schematic structural diagram of a large-capacity battery assembly according to Example 11;

[0078] FIG38 is a schematic diagram of the partial structure of the battery cluster assembly of Example 11;

[0079] FIG39 is a schematic structural diagram of an insulating support member according to Example 12;

[0080] FIG40 is a schematic structural diagram of a large-capacity battery assembly according to Example 12;

[0081] FIG41 is a schematic diagram of the assembly process of a large-capacity battery assembly according to Example 12;

[0082] The accompanying drawings are denoted as follows:

[0083] 01. End plate; 02. Housing top plate; 03. Avoidance hole; 04. Housing bottom plate; 05. Electrolyte shared chamber; 06. Gas chamber; 1. Support block; 2. First hole; 3. Limit plate; 4. Protrusion; 5. Support rod; 6. Insulating sleeve; 7. Step structure; 8. Insulating gasket; 9. Heat transfer connector; 10. Inner bottom surface of the first cylinder body;

[0084] 201, sub-pipeline; 202, intermediate connecting pipe; 203, lower cover of single battery;

[0085] 211, flat plate; 2111, raised portion; 213, supporting rib; 22, insulating support member; 21, supporting beam; 2110, supporting beam bottom plate; 222, insulating pad; 23, screw; 231, insulating sleeve; 24, rib plate; 26, second cylinder; 27, single battery;

[0086] 31. Insulating support member; 311. Support member; 3111. First support rib; 3112. Support plate; 312. L-shaped bracket; 3121. First bracket; 3122. Second bracket; 3123. L-shaped support rod; 3124. Connecting rod; 3125. Hollow portion; 3126. Positioning hole; 32. High-capacity battery assembly; 320. High-capacity battery; 321. Housing; 32111. Channel; 32 12. First side panel; 3214. Second side panel; 323. Insulating gasket; 324. Single cell polarity terminal; 325. Liquid cooling tube; 326. Electrical connector; 327. Insulating protective cover; 33. Support frame; 331. U-shaped frame; 332. First beam; 333. Connecting column; 334. Second beam; 3341. Upper wing panel; 335. Explosion venting manifold; 336. Third beam; 34. Explosion venting pipe assembly. DETAILED DESCRIPTION

[0087] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of the specific embodiments of the present invention is given in conjunction with the accompanying drawings. It is obvious that the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in this field without creative work should fall within the scope of protection of the present invention.

[0088] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0089] In the description of the present invention, it should be noted that the terms "top," "bottom," and so on, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," "third," "fourth," and so on, are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0090] Currently, many batteries on the market are connected in parallel or in series to form large-capacity batteries (also known as battery modules or battery packs).

[0091] However, existing large-capacity batteries have inherent differences among individual cells. Due to the "barrel effect," the performance of the worst cell is often affected, significantly limiting the upper capacity and cycle life of the entire large-capacity battery. Therefore, improving the uniformity of individual cells in large-capacity batteries has become a key and challenging area of ​​research in this field.

[0092] In order to solve the above problems, the relevant technology proposes a large-capacity battery, as shown in Figures 1 and 2, the large-capacity battery includes a shell and multiple single cells; the multiple single cells are placed in parallel in the shell, the shell is composed of a first cylinder and end plates 01 fixed at both ends of the first cylinder, and avoidance holes 03 are opened on the top plate 02 of the shell corresponding to the poles of each single cell, and the shell area corresponding to the avoidance hole 03 is fixedly sealed with the single cell shell.

[0093] The bottom plate 04 of the outer shell has a raised portion in the direction away from the top plate, forming a first channel, which serves as an electrolyte shared chamber 05. The electrolyte shared chamber 05 is connected to the electrolyte area of ​​the inner cavity of each single cell. Through the electrolyte shared chamber 05, each single cell can be placed in a unified electrolyte environment, ensuring the uniformity of the electrolyte in each single cell and improving the performance and cycle life of the large-capacity battery.

[0094] The housing top plate 02 may also have a raised portion facing away from the bottom plate, forming a second channel serving as a gas chamber 06. The gas chamber 06 covers the gas ports on the tops of the individual cells in the large-capacity battery. It should be noted that the term "gas port" here encompasses the following two meanings:

[0095] 1) The gas port is a through hole directly opened on the upper cover of the single cell and passing through the inner cavity of the single cell;

[0096] At this time, the inner cavity of the gas chamber 06 is connected with the gas area of ​​the inner cavity of each single battery through the gas port. The gas chamber 06 serves as a gas sharing chamber for each single battery. Based on the gas chamber 06, the gas areas of each single battery can be connected to achieve gas balance, so that the gas of each single battery is shared to ensure the consistency of each single battery, which improves the cycle life of the large-capacity battery to a certain extent; when any single battery has thermal runaway, the smoke in the inner cavity of the single battery enters the gas chamber 06 and is discharged through the gas chamber 06, thereby improving the safety of the large-capacity battery.

[0097] 2) The gas port is an explosion vent or explosion-proof port provided on the upper cover of the single cell, and an explosion vent membrane is provided at the explosion vent or explosion-proof port;

[0098] At this time, the gas chamber 06 is used as an explosion venting channel. When the explosion venting membrane at the gas port of any single battery is broken by the internal smoke, the smoke in the internal cavity of the single battery is discharged through the gas chamber 06, thereby improving the safety of the large-capacity battery.

[0099] However, in actual use, it was found that when the above-mentioned large-capacity battery is used alone as an energy storage device, the bottom support surface (the outer bottom surface of the electrolyte shared chamber 05) is relatively small in the y direction (the width direction of the first cylinder), and its stability is poor when used as a support surface, and its strength is also not ideal; in addition, when assembling an energy storage device based on the above-mentioned large-capacity battery, the area on both sides of the electrolyte shared chamber 05 at the bottom of the first cylinder is generally used as a support surface, which has poor stability, and an insulating pad needs to be added between the support surface and the energy storage box support frame, or the support surface needs to be insulated; making the process of assembling an energy storage device based on such large-capacity batteries more complicated.

[0100] In order to overcome the problems of poor support stability of the above-mentioned large-capacity battery and the complex process of assembling the energy storage device therefrom, Examples 1 to 7 propose a cylindrical assembly for a large-capacity battery and a large-capacity battery assembly.

[0101] Example 1

[0102] This embodiment is a first barrel assembly, which can be used as the barrel of the above-mentioned large-capacity battery. Its structure is shown in Figure 3. For the convenience of description, the length direction of the first barrel assembly can be defined as the x direction, the width direction of the first barrel assembly can be defined as the y direction, and the height direction of the first barrel assembly can be defined as the z direction.

[0103] Unlike the first cylindrical body in Figures 1 and 2 , this embodiment features support blocks 1 located outside the housing bottom plate 04 on either side of the shared electrolyte chamber 05. These support blocks 1 extend along the x-direction. As can be seen from the figure, a first hole 2 is defined in the x-direction on support blocks 1. Compared to Figures 1 and 2 , the bottom of the first cylindrical body in this embodiment has a larger dimension in the y-direction, providing greater stability when placed.

[0104] In this embodiment, first hole 2 is a through-hole extending through support block 1 in the x-direction. An insulating support rod, whose length is greater than that of the first barrel and whose cross-section matches that of first hole 2, can be inserted into the through-hole of support block 1, ensuring that both ends of the insulating support rod extend beyond the end surface of the first barrel. When a large-capacity battery with this first barrel assembly is assembled into an energy storage device, the ends of the insulating support rod can serve as supports, secured to the support frame of the energy storage box. This makes operation simple and convenient, while also improving the stability of such a large-capacity battery within the energy storage box.

[0105] In this embodiment, the first cylinder assembly can be integrally formed using an aluminum extrusion process. For the first cylinder formed using the aluminum extrusion process, in the x-direction, the size of the support block 1 is equal to the size of the first cylinder, and the end face of the support block 1 is located in the same plane as the end face of the first cylinder. In order to make the first cylinder have a more regular structure, in the y-direction, the size of the support block 1 is equal to the size of the outer shell bottom plate 04 area on both sides of the electrolyte shared chamber 05, and the outer bottom surface of the support block 1 is located in the same plane as the outer bottom surface of the electrolyte shared chamber 05. In the z-direction, the size of the support block 1 is equal to the size of the outer side wall of the electrolyte shared chamber 05, and the outer side wall of the support block 1 is located in the same plane as the outer side wall of the first cylinder. It should be noted that the area of ​​the outer shell bottom plate 04 on both sides of the electrolyte shared chamber 05 is the area a in Figure 3.

[0106] It can also be understood that this embodiment uses an aluminum extrusion process to integrally form a first cylinder having the following structure:

[0107] The first barrel has open ends at both ends; the inner bottom surface has two bosses extending along the x-direction and arranged in the y-direction, the same length as the first barrel. The top surface of the bosses serves as the support surface for each single battery. In the y-direction, a first channel is formed between the two bosses, serving as a shared electrolyte chamber 05; the above-mentioned first hole 2 is opened in the bosses along the x-direction.

[0108] In some other embodiments, the first hole 2 can be a blind hole, preferably a blind hole extending along the x-direction is opened at both ends of the support block 1; a plurality of insulating support rods whose length is less than the first cylinder and whose cross-section is compatible with the cross-section of the first hole 2 can be inserted into the blind holes respectively, and the two ends of each insulating support rod extend out of the end face of the first cylinder; similarly, the two ends of the insulating support rod can serve as support parts and be fixed to the support frame of the energy storage box. However, compared with the through-hole structure, the contact area between the insulating support rod and the large-capacity battery is smaller, which makes the support strength weaker. This type of first cylinder assembly can be formed by combining aluminum extrusion process and drilling process. For example, the semi-finished first cylinder without blind holes on the support block 1 can be formed by aluminum extrusion process, and then the blind holes can be opened on the support block 1 by drilling process. However, the process is more complicated than that of this embodiment.

[0109] In some other embodiments, the support block 1 and the first cylinder can also be separate parts, and the support block 1 is fixed to the outer surface of the shell bottom plate 04 and both sides of the electrolyte shared chamber 05 by welding or screw connection. However, compared with this embodiment, the processing process is more complicated. In addition, the sealing of the connection part cannot be guaranteed. When such a first cylinder is used for a large-capacity battery, it will cause the electrolyte inside the first cylinder to leak, or outside air will enter the first cylinder, causing the large-capacity battery to fail.

[0110] Example 2

[0111] The difference from Example 1 is that this embodiment is further provided with a limiting plate 3 on the basis of Example 1;

[0112] As shown in FIG4 , in this embodiment, two limit plates 3 extending along the x-direction are provided on the inner surface of the top plate 02 of the shell of embodiment 1. In the z-direction, the size of the limit plates 3 should satisfy the following requirements: the distance between the bottom surface of the limit plates 3 and the inner bottom surface 10 of the first cylinder body should be slightly larger than the distance between the lower cover plate and the upper cover plate of each single battery.

[0113] When each single cell is loaded into the first cylindrical body, the upper cover of each single cell slightly contacts the bottom surface of the limiting plate 3, or a small gap is provided, to ensure that each single cell does not significantly shift along the z-direction within the first cylindrical body. If, in the z-direction, the distance between the bottom surface of the limiting plate 3 and the inner bottom surface 10 of the first cylindrical body is smaller than the distance between the lower cover and the upper cover of each single cell, the single cell will be unable to be loaded into the first cylindrical body. If, in the z-direction, the distance between the bottom surface of the limiting plate 3 and the inner bottom surface 10 of the first cylindrical body is much larger than the distance between the lower cover and the upper cover of each single cell, the limiting function in the z-direction will be lost. Taking into account that the processing errors of each single cell may cause the distance between the lower cover and the upper cover of each single cell to be not completely consistent, in order to ensure that all groups of single cells can be successfully loaded into the above-mentioned first cylinder assembly, the distance between the bottom surface of the above-mentioned limit plate 3 and the inner bottom surface 10 of the first cylinder body should be slightly larger than the maximum distance between the lower cover and the upper cover; of course, when screening each single cell, we will also try to avoid grouping single cells with large deviations in the distance between the lower cover and the upper cover.

[0114] It should be noted that the limiting plate 3 cannot block the avoidance hole 03 on the top plate 02 of the housing.

[0115] The limiting plate 3 can also be extruded integrally with the first cylinder during the extrusion process of the first cylinder, and the processing process is simple and convenient.

[0116] In some other embodiments, a limiting plate 3 of the above structure extending along the x-direction may be provided on the inner surface of the housing top plate 02 in embodiment 1. However, compared with this embodiment, the limiting of each single battery in the z-direction is uneven.

[0117] Example 3

[0118] The difference from Example 1 and Example 2 is that this embodiment is additionally provided with a protrusion 4 on the basis of Example 1 or Example 2.

[0119] As shown in Figures 5 and 6, in this embodiment, a protrusion 4 extending in the x-direction and protruding in the y-direction is provided on the long edge of the housing top plate 02. The protrusion 4 is smoothly connected to the side wall of the first cylinder.

[0120] Compared with the above embodiment, in the y direction, the size of the housing top plate 02 of this embodiment is larger.

[0121] On the one hand, the area of ​​the housing top plate 02 on either side of the avoidance hole 03 can be increased. In this area, the temperature of the entire large-capacity battery can be regulated by adding heat transfer connectors (see Figure 1) or terminal adapters connected to the individual cell poles. The larger this area, the larger the heat transfer connectors or terminal adapters that can be installed. Larger heat transfer connectors or terminal adapters provide a larger heat exchange area, thereby achieving better heat exchange effects.

[0122] It should be noted that the aforementioned heat transfer connector 9 can adopt the structure shown in Figure 1, comprising a slender member used to connect to the positive or negative pole of each single cell. Furthermore, the slender member is provided with a clamping portion along the axial direction for mounting a heat transfer tube. By connecting the positive or negative poles of multiple single cells via the heat transfer connector and clamping the heat transfer tube to the heat transfer connector, the local temperature of the poles on each single cell can be controlled, significantly reducing the risk of thermal runaway caused by excessive pole temperatures. The pole adapter can be the electrical busbar disclosed in Chinese Patent CN116130892A.

[0123] On the other hand, when the areas on both sides of the avoidance hole 03 are relatively large, it is easier to securely seal the first cylindrical area surrounding the avoidance hole 03 with the cell housing. For example, a sealing connector can be added between the avoidance hole 03 and the pole. This sealing connector includes a hollow member; the bottom of the hollow member is used to seal with the first area of ​​the cell, and the top of the hollow member is sealed with the second area of ​​the housing top plate 02. The first area is the area surrounding any pole in the upper cover of any cell; the second area is the area surrounding the outer surface of the housing top plate 02 corresponding to any avoidance hole 03 in the first cylindrical body. The area surrounding the pole is the area surrounding the insulating gasket on the pole. The insulating gasket is a component on the cell used to insulate the pole from the upper cover.

[0124] When the areas on both sides of the avoidance hole 03 are larger, it is convenient for the top of the hollow component to be sealed and connected to the second area of ​​the shell top plate 02 .

[0125] The protrusion 4 can also be extruded integrally with the first cylinder during the extrusion process of the first cylinder, and the processing process is simple and convenient.

[0126] Example 4

[0127] Different from the above embodiments, this embodiment is further provided with a gas chamber 06 on the top plate 02 of the housing based on any of the above embodiments.

[0128] As can be seen from Figure 7, in this embodiment, the housing top plate 02 protrudes away from the housing bottom plate 04 to form a second channel, which serves as the gas chamber 06. The gas chamber 06 can also be extruded integrally with the first cylinder during the extrusion process, which makes the processing simple and convenient.

[0129] Example 5

[0130] Different from the above embodiments, this embodiment is based on any of the above embodiments, and an insulating support rod is inserted into the first hole 2 .

[0131] This embodiment is described by taking the first hole 2 as a through hole as an example. As can be seen from Figure 8, both ends of the insulating support rod extend out of the first hole 2. In order to facilitate fixing it to the support frame of the energy storage box, threaded holes can be opened in the extending part of the insulating support rod.

[0132] As can be seen from the figure, the cross-section of the first hole 2 in this embodiment is rectangular, which is convenient for processing and has good stability when combined with the insulating support rod with a rectangular cross-section; in some other embodiments, four shorter insulating support rods can also be inserted into the two through holes of the support block 1 near the ends of the through holes, but compared with this embodiment, the contact area between the insulating support rod and the large-capacity battery is smaller, which makes the support strength weaker.

[0133] The insulating support rod of this embodiment includes a metal support rod 5 and an insulating sleeve 6 sleeved on the outside of the support rod 5. The support rod 5 can be made of materials such as iron or stainless steel; the insulating sleeve 6 can be made of materials such as PP or PE; the insulating sleeve 6 can isolate the support rod 5 from the first cylinder, achieving insulation between the two. This embodiment has good insulation performance, high support strength, and low cost. To further ensure insulation between the support rod 5 and the first cylinder, as shown in Figure 9, an insulating washer 8 can be sleeved on the portion where the support rod 5 extends into the first hole 2. The insulating washer 8 is tightly fitted with the end face of the first hole 2 and can be achieved by bonding.

[0134] During assembly, the insulating sleeve 6 is first inserted into the first hole 2 , and then the support rod 5 is inserted into the insulating sleeve 6 .

[0135] In other embodiments, the insulating support rods 5 may be made of a hard insulating material, such as mica or some polymer materials, which are more expensive than in this embodiment. Metallic support rods 5 may also be used, but this requires coating the surface of the support rods 5 with an insulating film, which is more complex and expensive than in this embodiment. Furthermore, if the film is less uniform, the insulation performance may be unreliable.

[0136] Example 6

[0137] Different from the above embodiments, this embodiment is based on any of the above embodiments, and a step structure 7 is provided on the open end surface of the first cylinder body. As shown in Figure 8, the two step surfaces of the step structure 7 can serve as mating surfaces with the end plates 01 at both ends of the first cylinder.

[0138] Example 7

[0139] This embodiment is a large-capacity battery, comprising a housing and a plurality of single cells arranged in parallel within the housing. The housing comprises a first cylinder and a first end plate and a second end plate respectively sealed and fixed at two opposite open ends of the first cylinder. The first cylinder is any of the first cylinder assemblies in the above-mentioned embodiments.

[0140] Currently, many batteries on the market are connected in parallel or in series to form large-capacity batteries (also known as battery modules or battery packs).

[0141] Chinese patent CN219144456U discloses a large-capacity battery, the structure of which is shown in Figure 10. It includes a battery pack body formed by several parallel-connected cells and a shared piping assembly located at the bottom of the battery pack body. The shared piping assembly is used to connect the internal cavities of the several cells, so that all cells in the large-capacity battery are exposed to a single electrolyte system. The shared piping assembly can enhance the uniformity of the electrolyte in each cell within the large-capacity battery, thereby improving cycle life. The shared piping assembly can also replenish the electrolyte in the large-capacity battery, extending the service life of the large-capacity battery and improving the safety of the large-capacity battery.

[0142] However, this type of shared pipeline assembly is formed by directly sealing and plugging multiple sections of sub-pipes 201 and intermediate connecting pipes 202 with each other through interference fit; at this time, the multiple sections of sub-pipes 201 are arranged one by one on the lower cover plate 203 of the single battery, and the sub-pipes extend along the arrangement direction of the single battery 27, and are extruded integrally with the lower cover plate 203 of the single battery, and are connected to the opening of the lower cover plate 203 of the single battery.

[0143] During assembly, the two ends of the sub-pipeline 201 are used as connection ends to the middle connecting pipe 202 . When two single cells are connected, one end of the sub-pipeline on the two single cells is squeezed into the two ends of the middle connecting pipe 202 respectively.

[0144] During the plugging process of the shared pipeline assembly, the sub-pipelines 201 and the intermediate connecting pipe 202 must be coaxial to achieve effective connection. However, the coaxiality of the sub-pipelines and the intermediate connecting pipe 202 is difficult to ensure due to the following reasons:

[0145] 1) The sub-pipeline and the lower cover of the single cell are integrated. If the position of the sub-pipeline on the lower cover of the single cell is slightly deviated, or the size of each sub-pipeline is slightly deviated, the coaxiality of each sub-pipeline will deviate when plugged in.

[0146] 2) When welding the above-mentioned integrated component to the second cylinder, due to differences in the welding process, the positions of the sub-pipelines relative to the second cylinder may be inconsistent, which may lead to deviations in the coaxiality of the sub-pipelines when plugged in;

[0147] 3) This solution requires the use of special tooling during connection. Improper use of the tooling or operator errors can lead to deviations in the coaxiality of the sub-pipelines.

[0148] In addition, during plugging, the deviation between the sub-pipelines will increase as the number of plugging increases, resulting in the coaxiality between the sub-pipelines being more difficult to ensure as the number of plugging increases; resulting in the assembly process, the yield rate decreases as the number of plugging increases.

[0149] In summary, since the sub-pipes of two adjacent single batteries are difficult to be coaxial, this solution may cause the sub-pipes to shift relative to the bottom plate of the shell, or the bottom plate of the shell to shift relative to the second cylinder during insertion, thereby damaging the batteries.

[0150] In order to overcome the above-mentioned problem of difficult assembly of the shared pipeline assembly of large-capacity batteries while completing the reliable fixation of multiple large-capacity batteries on the support frame, Examples 8 to 9 propose a shell bottom plate assembly and a first-level large-capacity battery assembly for large-capacity batteries.

[0151] The large-capacity batteries of Examples 8 to 9 include a shell and multiple single cells; the multiple single cells are placed in parallel in the shell, and the shell is composed of a second cylinder and a shell top plate and a shell bottom plate fixed to two opposite open ends of the second cylinder, wherein avoidance holes are opened on the shell top plate corresponding to the polarity terminals of each single cell, and each single cell polarity terminal extends out of the corresponding avoidance hole, and the shell top plate area corresponding to the avoidance hole is fixedly sealed to the single cell shell.

[0152] It should be noted that the single cell polarity terminal described here can be a single cell pole. In order to prevent the single cell pole from being unable to smoothly extend out of the avoidance hole as a polarity terminal, a pole adapter can also be connected to the single cell pole, and the overall structure of the single cell pole and the pole adapter can be used as the single cell polarity terminal.

[0153] A liquid storage channel extending along its length is provided on the bottom plate of the shell, which serves as an electrolyte sharing chamber. The electrolyte sharing chamber is connected to the electrolyte area of ​​the inner cavity of each single cell. Through the electrolyte sharing chamber, each single cell can be placed in a unified electrolyte environment, ensuring the uniformity of the electrolyte in each single cell and improving the performance and cycle life of large-capacity batteries.

[0154] The top plate of the housing may also be provided with an airflow channel extending along its length, serving as a gas chamber, which covers the gas ports on the top of each single cell in the large-capacity battery. It should be noted that the gas port here includes the following two meanings:

[0155] 1) The gas port is a through hole directly opened on the upper cover of the single cell and passing through the inner cavity of the single cell;

[0156] At this time, the inner cavity of the gas chamber is connected with the gas area of ​​the inner cavity of each single cell through the gas port. The gas chamber serves as a gas sharing chamber for each single cell. Based on the gas chamber, the gas areas of each single cell can be connected to achieve gas balance, so that the gas of each single cell is shared to ensure the consistency of each single cell, which improves the cycle life of the large-capacity battery to a certain extent; when any single cell has thermal runaway, the smoke in the inner cavity of the single cell enters the gas chamber and is discharged through the gas chamber, thereby improving the safety of the large-capacity battery.

[0157] 2) The gas port is an explosion vent or explosion-proof port provided on the upper cover of the single cell, and an explosion vent membrane is provided at the explosion vent or explosion-proof port;

[0158] At this time, the gas chamber is used as an explosion venting channel. When the explosion venting membrane at the gas port of any single battery is broken by the internal smoke, the smoke in the internal cavity of the single battery is discharged through the gas chamber, thereby improving the safety of the large-capacity battery.

[0159] In actual use, it has been found that when assembling energy storage devices based on the above-mentioned large-capacity batteries, at least part of the bottom plate of the casing is generally used as a support surface, and an insulating pad needs to be added between the support surface and the energy storage box support frame, or the support surface needs to be insulated; this makes the process of assembling energy storage devices based on such large-capacity batteries relatively complicated.

[0160] In order to overcome such problems, Examples 8 and 9 optimize the housing bottom plate of the large-capacity battery. The specific structure of the housing bottom plate is described in detail below with reference to the accompanying drawings and specific embodiments.

[0161] Example 8

[0162] Figure 11 shows the structure of the housing base plate for a large-capacity battery in this embodiment. This structure primarily consists of the housing base plate 04 and an insulating support member 22 secured to the base plate 04. The insulating support member 22 is insulated from the base plate 04 and serves as the bottom support for the large-capacity battery. When assembling such large-capacity batteries into an energy storage device, simply secure the insulating support member 22 to the support frame of the energy storage housing, making the process simple and convenient.

[0163] The housing bottom plate 04 includes a flat plate 211 and an electrolyte sharing chamber 05 provided on the flat plate 211. The electrolyte sharing chamber 05 is used to connect the electrolyte areas of the inner cavities of each single cell 27 in the large-capacity battery.

[0164] For ease of description, the length direction of the housing bottom plate 04 is defined as the x direction, the width direction is defined as the y direction, and the thickness direction is defined as the z direction;

[0165] The electrolyte shared chamber 05 mainly includes the following two structural forms:

[0166] The first structure: the electrolyte shared chamber 05 is a hollow tube provided on the flat plate 211 and extending along the x-direction, as shown in FIG12 ;

[0167] The flat plate 211 and the hollow tube are provided with through holes penetrating the inner cavity of the hollow tube;

[0168] When the housing bottom plate 04 is secured to the bottom of the high-capacity battery's second cylindrical body 26, the hollow tube is located on the lower surface of the flat plate 211 (i.e., the hollow tube is located on the surface of the flat plate 211 away from the individual cells 27). Through the through-holes, the inner cavity of the hollow tube is directly connected to the electrolyte area within the inner cavity of each individual cell 27. It should be noted that during operation, the exposed ends of the hollow tube need to be sealed to prevent the external environment from affecting the electrolyte within the inner cavity of each individual cell 27.

[0169] The second structure: the electrolyte shared chamber 05 is a liquid storage channel provided on the flat plate 211;

[0170] Such liquid storage channels can include the following three structures:

[0171] 1) A groove extending along the length of the flat plate 211 is directly formed on the upper surface of the flat plate 211 to serve as a liquid storage channel, as shown in FIG13 ;

[0172] The two ends of the liquid storage channel parallel to the yz plane are closed ends, that is, in the x direction, the size of the liquid storage channel is smaller than the size of the flat plate 211; the corresponding liquid storage channel can be directly formed on the upper surface of the flat plate 211 by milling or casting. This structure requires that the flat plate 211 has a larger size in the z direction.

[0173] When the shell bottom plate 04 is fixed to the bottom of the second cylinder 26 of the large-capacity battery, the open end of the liquid storage channel faces upward, that is, toward the top of the large-capacity battery; the inner cavity of the liquid storage channel is directly connected to the electrolyte area of ​​the inner cavity of each single battery 27.

[0174] 2) The flat plate 211 is provided with a raised portion 2111 in the z direction, and a liquid storage channel extending in the x direction is provided on the raised portion 2111. Both ends of the liquid storage channel parallel to the yz plane are open ends; as shown in FIG14 ;

[0175] When the housing bottom plate 04 is secured to the bottom of the large-capacity battery's second cylindrical body 26, the open end of the liquid storage channel (the open end parallel to the xy plane) faces upward, and the inner cavity of the liquid storage channel is directly connected to the electrolyte area within each single cell 27. It should be noted that during operation, the open ends of the liquid storage channel (the open ends parallel to the yz plane) must be sealed to prevent the external environment from affecting the electrolyte within each single cell 27.

[0176] 3) At least two support ribs 213 extending along the x-direction are provided on the upper surface of the flat plate 211. The two support ribs 213 and the area of ​​the flat plate 211 located between the two support ribs 213 form a liquid storage channel extending along the x-direction; as shown in FIG15 ;

[0177] When the housing bottom plate 04 is secured to the bottom of the large-capacity battery's second cylindrical body 26, the top surfaces of the two support ribs 213 contact the housing bottom plate 04 of each individual battery 27, directly connecting the inner cavity of the liquid storage channel to the electrolyte area within each individual battery 27. It should be noted that during operation, the open ends of the liquid storage channel (the open ends parallel to the yz plane) must be sealed to prevent the external environment from affecting the electrolyte within each individual battery 27.

[0178] It should be noted that the electrolyte shared chamber 05 serves as an electrolyte storage chamber. After it is connected to the electrolyte area of ​​the inner cavity of each single battery 27, it is necessary to ensure that the electrolyte in the entire large-capacity battery does not come into contact with the external environment.

[0179] In this embodiment, the insulating support member 22 includes two support beams 21 extending along the length of the housing bottom plate 04 and fixedly mounted on the housing bottom plate 04. This embodiment is applicable to any housing bottom plate 04 having any structure of the electrolyte sharing chamber 05 described above. The following description will primarily use the housing bottom plate 04 shown in FIG. 14 as an example.

[0180] As shown in Figure 16, in this embodiment, two support beams 21 are located on either side of the raised portion 2111, removably connected to the housing bottom plate 04 on either side of the raised portion 2111. In the x-direction, both ends of the support beams 21 extend beyond the housing bottom plate 04, serving as fixed ends to the energy storage box support frame. In the z-direction, the support beams 21 extend beyond the raised portion 2111, serving as supporting ends.

[0181] As can be seen from Figures 17 and 18 , the cross-section of the support beam 21 in this embodiment is U-shaped. The support beam bottom plate 2110 is in close contact with the housing bottom plate 04, and the two are connected using screws 23. To improve connection reliability, a rib 24 extending along the x-direction can be added to the housing bottom plate 04 to increase the z-direction dimension of the connection portion of the screw 23. The rib 24 can be located between the support beam bottom plate 2110 and the housing bottom plate 04, or it can be located on the inner surface of the housing bottom plate 04 (i.e., the surface of the housing bottom plate 04 close to each single cell 27). The heads of the screws 23 pass through the support beam bottom plate 2110, the housing bottom plate 04, and connect to the rib 24. Depending on the x-direction dimension of the housing bottom plate 04, different numbers of screws 23 are selected for connection.

[0182] In some other embodiments, riveting may be used to connect the support beam 21 to the housing bottom plate 04 , but the connection is more difficult than in this embodiment.

[0183] In some other embodiments, a support beam 21 with a rectangular cross-section may be used. However, compared with this embodiment, the bottom plate of the housing is heavier and the material cost is higher.

[0184] This embodiment uses a metal support beam 21, which requires an insulating pad 222 to be installed between the support beam 21 and the housing bottom plate 04. As shown in Figure 18, in this embodiment, channel steel can be used as the support beam 21. The insulating pad 222 is installed between the support beam bottom plate 2110 and the housing bottom plate 04. Insulating pads 222 are also installed between the side plates of the support beam 21 and the raised portion 2111. The insulating pads 222 can be made of materials such as rubber or mica.

[0185] Accordingly, an insulating sleeve 231 needs to be provided on the portion of the screw 23 that contacts the support beam 21 . In some other embodiments, an insulating screw may also be directly used.

[0186] In some other embodiments, as shown in FIG. 19 and FIG. 20 , in order to ensure insulation between the support beam 21 and the housing bottom plate 04 , the support beam 21 may also be made of insulating material. However, it should be noted that such support beam 21 requires a certain support strength.

[0187] Example 9

[0188] This embodiment is a high-capacity battery, the structure of which is shown in Figure 21. It includes a housing and ten parallel-connected cells 27 within the housing. These cells 27 are prismatic. The number of cells in other embodiments can be adjusted based on actual needs. Each cell 27 has a through-hole at the bottom of its housing that extends through its inner cavity.

[0189] The housing includes a second cylinder 26 with open ends at both ends, and a housing top plate 02 and a housing bottom plate respectively fixed to the two open ends of the second cylinder 26;

[0190] The housing bottom plate is the same as that in the above-mentioned embodiment and can be welded to the second cylindrical body 26. The housing top plate 02 can also be welded to the second cylindrical body 26. A clearance hole is provided in the housing top plate 02 to allow the polarity terminals of each cell 27 to extend. Each cell 27 polarity terminal extends through the clearance hole, and the area of ​​the housing top plate 02 surrounding the clearance hole is securely sealed to the cell 27 housing. As can be seen in Figure 21, the polarity terminals of the cell 27 in this embodiment are the cell 27 posts.

[0191] In this embodiment, each single cell 27 is placed in a shell having an electrolyte sharing chamber 05 at the bottom, and the electrolyte sharing chamber 05 is connected to the inner cavity of each single cell 27 located in the shell, so that the electrolyte of each single cell 27 is shared to ensure the consistency of each single cell 27. That is, the electrolyte chamber of each single cell 27 is connected so that the electrolyte of all single cells 27 is in the same system, which reduces the difference between the electrolytes of each single cell 27, improves the consistency between each single cell 27 to a certain extent, and thus improves the cycle life of the large-capacity battery to a certain extent.

[0192] Embodiments 10 to 12 are an insulating support member, which is mainly composed of a support member and two L-shaped brackets.

[0193] Typically, a large-capacity battery has a rectangular structure. Examples 10 to 12 illustrate a large-capacity battery with a rectangular structure. For ease of description, the length direction of the large-capacity battery is defined as the x-direction, the width direction as the y-direction, and the height direction as the z-direction.

[0194] The support member is used to be placed at the bottom of the large-capacity battery to support the large-capacity battery. It can adopt a variety of different structural forms, such as a first support rib structure and a support plate structure. When the first support rib structure is adopted, it is preferably provided with a corresponding channel at the bottom of the corresponding large-capacity battery for the first support rib to be inserted into the channel and cooperate with the L-shaped bracket to support the large-capacity battery. When the support plate structure is adopted, it is preferred that the shape of the support plate is a plate that matches the shape of the bottom of the large-capacity battery to stably support the large-capacity battery.

[0195] The L-shaped bracket includes a first bracket and a second bracket, wherein the first bracket is parallel to the yz plane, and the second bracket is parallel to the xy plane, that is, in the L-shaped brackets of Examples 10 to 12, the first bracket and the second bracket are perpendicular to each other, and the angle between them is 90°. The first brackets of the two L-shaped brackets are respectively fixed to the two ends of the support member, and the second brackets are respectively used to fix the frame body relative to the support frame. The L-shaped bracket can also adopt a variety of different structural forms, such as an L-shaped plate, a plate parallel to the yz plane can be used as the first bracket, connected to the support member, and a plate parallel to the xy plane can be used as the second bracket, used to fix to the frame body of the support frame. An L-shaped support rod can also be used, a rod parallel to the yz plane can be used as the first bracket, connected to the support member, and a rod parallel to the xy plane can be used as the second bracket, used to fix to the frame body of the support frame.

[0196] Embodiments 10 to 12 also provide a large-capacity battery assembly having the above-mentioned insulating support member, and a battery cluster assembly consisting of the above-mentioned large-capacity battery assembly and a support frame.

[0197] Examples 10 to 12 utilize support members to support the large-capacity battery from the bottom of the large-capacity battery, and the large-capacity battery is stably fixed on the support frame by L-shaped brackets fixed at both ends of the support member. The structure is simple and compact, with high stability, so that the battery cluster assembly has a higher energy density.

[0198] The following is a further description with reference to the accompanying drawings and specific embodiments 10 to 12.

[0199] Example 10

[0200] As shown in FIG22 , it is a schematic structural diagram of the insulating support member 31 of this embodiment. As can be seen from the figure, this embodiment adopts two mutually parallel first support ribs 3111 as the support member 311 ; and adopts an L-shaped plate as the L-shaped bracket 312 .

[0201] In some other embodiments, the number of the first supporting ribs 3111 can be adjusted according to actual needs.

[0202] The first plates of the two L-shaped plates (the plates parallel to the yz plane) serve as first brackets 3121, connected to the ends of the two first support ribs 3111 on the same side. The second plates of the two L-shaped plates (the plates parallel to the xy plane) serve as second brackets 3122, fixed to the frame body opposite the support frame 33. The first and second plates can be integral or separate components.

[0203] The first support rib 3111 can be a solid structure or a hollow structure, and its cross-section is preferably adapted to the channel 32111 of the bottom plate 04 of the large-capacity battery housing. For example, it can be a rectangular cross-section, a trapezoidal cross-section, or other polygonal cross-sections, which are not listed here one by one.

[0204] As shown in Figure 23, this embodiment uses a relatively simple rectangular cross-section first support rib 3111. Therefore, the corresponding cross-section of the channel 32111 in the bottom plate 04 of the large-capacity battery housing is also preferably rectangular. Using a rectangular cross-section first support rib 3111 to support the large-capacity battery provides better support stability. Furthermore, as can be seen from Figure 23, this embodiment's first support rib 3111 is hollow, facilitating connection with the L-shaped plate. The specific connection method is described in detail below.

[0205] In order to ensure the supporting strength of the first support rib 3111, this embodiment uses metal material as the material of the first support rib 3111. At the same time, a thermoplastic tube can be sleeved on the first support rib 3111 to insulate the first support rib 3111 from the large-capacity battery.

[0206] In some other embodiments, the first supporting rib 3111 may be directly made of insulating material. However, compared with this embodiment, its supporting strength is difficult to guarantee.

[0207] During assembly of this embodiment, the first support rib 3111 needs to be inserted into the channel 32111 of the bottom plate 04 of the large-capacity battery housing, and then the L-shaped plates are fixed to both ends of the first support rib 3111 extending out of the channel 32111. Therefore, in this embodiment, the first support rib 3111 and the L-shaped plates are separate parts.

[0208] 24 , it can be seen that in this embodiment, a connecting rod 3124 extending along the x-direction is provided on the first plate (first bracket 3121) of the L-shaped plate for connecting to the first support rib 3111. Corresponding positioning holes 3126 are provided on the first support rib 3111 and the connecting rod 3124.

[0209] During the specific assembly, the first support rib 3111 is inserted into the channel 32111 of the bottom plate 04 of the large-capacity battery housing, and then the connecting rod 3124 is inserted into the first support rib 3111, and the two are fixed by passing screws or pins through the positioning holes 3126.

[0210] In some other embodiments, the connecting rod 3124 can be connected to the first supporting rib 3111 by welding. However, in order to improve the energy density of the battery cluster, there is a smaller distance between the first plate and the large-capacity battery, which makes the operating space smaller and the welding more difficult.

[0211] In some other embodiments, the first support rib 3111 and the L-shaped plate can be an integrated part, and the large-capacity battery can be directly placed on the first support rib 3111 for support. Accordingly, in order to improve the support stability, the number of first support ribs 3111 can be increased.

[0212] As can also be seen in Figure 24, this embodiment includes a hollow portion 3125 on the first plate. The portions on either side of the hollow portion 3125 are connected to the two first support ribs 3111. The provision of the hollow portion 3125 reduces the weight of the L-shaped plate, thereby minimizing its impact on the normal operation of the support frame 33. Furthermore, the hollow portion 3125 provides a space for the extension of certain functional structures on the large-capacity battery. For example, as shown in Figure 26, this allows the extension of the vent tube assembly 34 on the large-capacity battery.

[0213] In this embodiment, an elongated hole is provided in the second plate (second bracket 3122) of the L-shaped plate; screws are inserted through the elongated hole to secure the support frame 33. The provision of the elongated hole can compensate for dimensional errors in the x-direction of the large-capacity battery assembly, ensuring a reliable connection.

[0214] As shown in FIG. 25 , it is a schematic structural diagram of a large-capacity battery assembly 32 of this embodiment, which includes a large-capacity battery 320 and the above-mentioned insulating support member 31 .

[0215] 26 and 27 , the large-capacity battery of this embodiment includes a housing 321 and a plurality of single batteries 27 arranged in parallel within the housing 321 .

[0216] The single cells 27 in this embodiment are square-shell batteries, and there are 13 of them. In other embodiments, the number can be adjusted according to actual needs. The inner cavity of each single cell 27 includes an electrolyte area and a gas area.

[0217] An electrolyte sharing chamber 05 is provided on the bottom plate 04 of the housing along the x direction. The inner cavity of the electrolyte sharing chamber 05 is connected to the inner electrolyte area of ​​each single battery 27 .

[0218] A gas chamber 06 is provided on the housing top plate 02 along the x-direction. The inner cavity of the gas chamber 06 is connected to the inner gas area of ​​each single battery 27 .

[0219] In some other embodiments, only an electrolyte shared chamber 05 or a gas chamber 06 may be provided, or a gas-liquid shared chamber may be provided along the x direction on the second side plate 3214 of the shell (the side plate parallel to the xz plane), and the inner cavity of the gas-liquid shared chamber is connected to the electrolyte area and gas area of ​​the inner cavity of each single battery 27.

[0220] In this embodiment, the top plate 02 of the large-capacity battery housing is provided with avoidance holes that allow the polarity terminals 324 of each single battery to extend out; each single battery polarity terminal 324 extends out of the corresponding avoidance hole and the housing area around the avoidance hole is fixedly sealed with the single battery 27 shell.

[0221] In this embodiment, a through slot is provided at the portion where the polarity terminal 324 of the single cell extends out of the avoidance hole, serving as a clamping portion for the liquid cooling tube 325. The liquid cooling tube 325 is fixed in the through slot. When the temperature of the large-capacity battery is higher than a set threshold, a heat transfer medium with a lower temperature is introduced into the liquid cooling tube 325 to cool the large-capacity battery. When the temperature of the large-capacity battery is lower than the set threshold, a heat transfer medium with a higher temperature is introduced into the liquid cooling tube 325 to heat the large-capacity battery. By controlling the temperature of the heat transfer medium, it is ensured that the large-capacity battery always operates at a normal operating temperature.

[0222] In order to prevent condensation generated by the liquid cooling tube 325 from causing safety problems, this embodiment can also lay an insulating sealant layer on the top plate 02 of the outer shell, and part of the area of ​​each single cell polarity terminal 324 is covered by the insulating sealant layer, and the electrical connection part of each single cell polarity terminal 324 extends out of the insulating sealant layer and is connected to the electrical connector 326; the main part of the liquid cooling tube 325 is covered by the insulating sealant layer, and the liquid inlet and outlet ends of the liquid cooling tube 325 extend out of the insulating sealant layer for connection to the liquid cooling equipment.

[0223] Furthermore, because the cell polarity terminals 324 are directly exposed to the external environment, there is a significant safety hazard during use due to the live cells polarity terminals 324. Therefore, this embodiment provides an insulating protective cover 327 on top of the large-capacity battery to provide insulation protection for the cell polarity terminals 324. This avoids the potential safety hazard of the exposed cell polarity terminals 324 during operation of the large-capacity battery and prevents foreign matter from falling into the cell polarity terminals 324, causing a short circuit in the large-capacity battery. This improves the safety of the large-capacity battery.

[0224] It should be noted that if the insulating protective cover 327 completely wraps the polarity terminal 324 of the single cell, it will make the electrical connection of such large-capacity batteries more difficult. Therefore, in this embodiment, a slit is opened on the side wall of the insulating protective cover 327 parallel to the xz plane, through which the electrical connector 326 can be connected to the polarity terminal 324 of the single cell, thereby achieving electrical connection.

[0225] It should also be noted that a channel for the liquid inlet and outlet ends of the liquid cooling tube 325 to extend out needs to be provided on the side wall of the insulating protective cover 327 .

[0226] To cooperate with the insulating support member 31, this embodiment provides support blocks 1 on the outer areas of the housing bottom plate 04 on both sides of the electrolyte sharing chamber 05. The support blocks 1 extend along the x-direction. As can be seen from the figure, channels 32111 are formed on the support blocks 1 along the x-direction.

[0227] In this embodiment, the channel 32111 is a through hole that passes through the support block 1 in the x direction; the first support rib 3111, which has a length greater than the shell and a cross-section that matches the cross-section of the channel 32111, can be inserted into the through hole of the support block 1, and ensure that both ends of the insulating support rod extend out of the first side plate 3212 of the shell.

[0228] In this embodiment, the above-mentioned cylinder can be integrally formed using an aluminum extrusion process (the cylinder here is the component after removing the two first side plates 3212 of the outer shell). In the cylinder formed using the aluminum extrusion process, in the x-direction, the size of the support block 1 is equal to the size of the cylinder, and the end face of the support block 1 and the end face of the cylinder are located in the same plane. In order to make the above-mentioned cylinder have a more regular structure, in the y-direction, the size of the support block 1 is equal to the size of the area of ​​the outer shell bottom plate 04 on both sides of the electrolyte shared chamber 05, and the outer bottom surface of the support block 1 and the outer bottom surface of the electrolyte shared chamber 05 are located in the same plane. In the z-direction, the size of the support block 1 is equal to the size of the outer side wall of the electrolyte shared chamber 05, and the outer side wall of the support block 1 and the outer side wall of the cylinder are located in the same plane.

[0229] It can also be understood that this embodiment uses an aluminum extrusion process to integrally form a cylinder with the following structure:

[0230] Both ends of the cylinder are open; the inner bottom surface has two bosses extending along the x-direction and arranged in the y-direction with the same length as the cylinder. The top surface of the bosses serves as the support surface for each single battery 27. In the y-direction, a first channel 32111 is formed between the two bosses, serving as the electrolyte shared chamber 05; the above-mentioned channel 32111 is opened in the bosses along the x-direction.

[0231] In other embodiments, the channel 32111 may be a blind hole, preferably one extending in the x-direction at each end of the support block 1. Multiple first support ribs 3111, each shorter than the cylinder and with a cross-section matching that of the channel 32111, may be inserted into the blind holes, with both ends of each first support rib 3111 extending beyond the end surface of the cylinder. However, compared to a through-hole structure, the contact area between the first support rib 3111 and the high-capacity battery is smaller, resulting in weaker support strength.

[0232] In other embodiments, any large-capacity battery structure known in the art may be used. That is, the insulating support member 31 of this embodiment is not limited to the large-capacity battery described herein; it can be applied to any large-capacity battery structure known in the art. If the existing large-capacity battery housing bottom plate 04 does not have a channel 32111 for the first support ribs 3111 to pass through, the large-capacity battery can be directly placed on the multiple first support ribs 3111 for support.

[0233] As shown in FIG. 28 , FIG. 29 and FIG. 30 , in this embodiment, the insulating support member 31 and the large-capacity battery 320 can be assembled through the following process:

[0234] First, insert the two first support ribs 3111 into the corresponding channels 32111 of the bottom plate 04 of the large-capacity battery housing;

[0235] Then, the connecting rod 3124 is inserted into the first supporting rib 3111 and the two are fixed by passing a screw or a pin through the positioning hole.

[0236] As shown in Figure 31, it is a schematic structural diagram of the battery cluster assembly of this embodiment, including a support frame 33 and the above-mentioned 13 large-capacity battery assemblies 32 fixed to the support frame 33 by insulating support members 31 (Figure 31 only schematically shows the two large-capacity battery assemblies 32 located on the outermost side).

[0237] In order to prevent the spread of smoke caused by thermal runaway of single cells 27 in individual large-capacity batteries and thus prevent safety problems, the present invention uses the explosion-proof pipe assembly of all large-capacity batteries in the battery cluster assembly to converge using the explosion-proof manifold 335. When a single cell 27 in any large-capacity battery in the battery cluster experiences thermal runaway, its thermal runaway smoke can be discharged through the explosion-proof manifold 335, thereby reducing the risk of thermal runaway spreading and the explosion of large-capacity batteries, even battery cluster assemblies and energy storage containers.

[0238] The structure of the support frame 33 is shown in Figure 32. It is a rectangular frame. To facilitate the fastening of the large-capacity battery to the support frame 33, this embodiment designates the support frame 33 as a split structure, comprising a U-shaped frame 331 and a first beam 332 fixed to the open end of the U-shaped frame 331. The large-capacity battery and the support frame are assembled through the open end of the U-shaped frame 331.

[0239] In some other embodiments, an integrated rectangular frame may be used. However, compared with this embodiment, the assembly of the large-capacity battery and the rectangular frame is more difficult.

[0240] For ease of description, this embodiment divides the U-shaped frame 331 into three parts: a second beam 334 and two third beams 336 fixed to each end of the second beam 334. To enhance the structural strength of the entire support frame 33, the first beam 332 and the second beam 334 opposite the first beam 332 are constructed of I-shaped steel (see Figures 33 and 34). The upper wing plates 3341 of the I-shaped steel serve as the fixing surfaces for the second bracket 3122. The third beam 336 is constructed of square steel. Furthermore, to facilitate assembly of the battery cluster assembly into the container, rollers are provided at the bottom of the third beam 336.

[0241] In some other embodiments, the first beam 332 and the second beam 334 may also be made of square steel. The supporting strength of square steel is relatively weak. In order to improve the supporting strength of the entire support frame 33, it is necessary to add a supporting structure in the middle of the frame. However, after adding the supporting structure, the distance between the large-capacity batteries on both sides of the supporting structure will be larger, which will lead to a lower energy density of the entire battery cluster assembly.

[0242] In this embodiment, the first beam 332 and the second beam 334 are made of I-shaped steel, and the upper wing plate 3341 is used as the fixing surface with the second bracket 3122. The upper wing plate 3341 is the maximum load-bearing surface of the I-shaped steel, so that the entire support frame 33 has good supporting strength without the need for additional supporting structural parts, thereby making the gaps between all large-capacity batteries equal (with small gaps), thereby improving the energy density of the entire battery cluster assembly.

[0243] During assembly, the corresponding insulating support member 31 is fixed on each large-capacity battery, and the explosion-proof pipe assemblies of all large-capacity batteries are connected using the explosion-proof manifold 335;

[0244] As shown in FIG34 , the U-shaped frame 331 is moved in the direction indicated by arrow a in the figure. The explosion relief manifold 335 is located between the upper and lower flanges of the I-shaped steel. The second bracket 3122 of the insulating support member 31 close to the second beam 334 is located on the upper wing plate 3341 of the second beam 334 , indicating that the frame has been moved into place.

[0245] The first beam 332 is then fixed to the open end of the U-shaped frame 331 using the connecting columns 333. Specifically, one end of each of the two connecting columns 333 can be fixed to both ends of the second beam 334. Then, the second beam 334 with the connecting columns 333 fixed thereto is moved in the direction indicated by arrow b until the connecting columns 333 are inserted into the third beam 336. The second bracket 3122 of the insulating support member 31 close to the first beam 332 is located on the upper wing plate 3341 of the first beam 332, indicating that the beam has been moved into place. The connecting columns 333 and the third beam 336 are fixed using screws.

[0246] Finally, the second brackets 3122 of the insulating support members 31 on both sides of each large-capacity battery are fixed to the upper wing plates 3341 of the first beam 332 and the upper wing plates 3341 of the second beam 334 respectively (see FIG. 35 ).

[0247] In some other embodiments, the large-capacity battery can be pushed in through the open end of the U-shaped frame 331 and fixed to the support frame 33 through the large-capacity battery bracket. Then, the first beam 332 is fixed to the open end of the U-shaped frame 331, and the large-capacity battery bracket on the other side is fixed to the first beam 332 to complete the assembly.

[0248] Example 11

[0249] Different from the embodiment 10, as shown in FIG36 , the L-shaped bracket 312 of this embodiment is composed of two L-shaped support rods 3123 ; that is, the two L-shaped support rods 3123 constitute an L-shaped bracket 312 ;

[0250] The first brackets 3121 of two L-shaped support rods 3123 are detachably fixed to the two ends of the same first support rib 3111, and the first brackets 3121 of the other two L-shaped support rods 3123 are detachably fixed to the two ends of another first support rib 3111.

[0251] As shown in Figure 37, it is a structural schematic diagram of the large-capacity battery assembly 32 of this embodiment, that is, a structural schematic diagram of the above-mentioned insulating support member 31 installed to the large-capacity battery 320; the assembly process and the structure of the large-capacity battery are the same as those in Example 10 and will not be repeated here.

[0252] As shown in Figure 38, it is a structural schematic diagram of the battery cluster assembly of this embodiment (only a large-capacity battery assembly 32 is schematically shown in the figure), that is, a structural schematic diagram of the above-mentioned large-capacity battery assembly 32 being installed on the support frame 33; the assembly process of the support frame 33 and the large-capacity battery assembly 32 and the support frame 33 is the same as that in Example 10 and will not be repeated here.

[0253] Example 12

[0254] Different from the above embodiment, the support member 311 and the L-shaped bracket 312 of this embodiment are integrated.

[0255] As shown in Figure 39, the support member 311 in this embodiment is a support plate 3112 that conforms to the shape of the bottom of the large-capacity battery and supports the large-capacity battery. To reduce the weight of the support plate 3112, weight-reducing holes can be provided in the support plate 3112. However, it should be noted that the provision of weight-reducing holes must not affect the support strength.

[0256] In this embodiment, there are two L-shaped brackets 312, both of which are L-shaped plates; the first bracket 3121 of one L-shaped plate is connected to one end of the support plate 3112, and the first bracket 3121 of the other L-shaped plate is connected to the other end of the support plate 3112. In other embodiments, the structure of the L-shaped bracket 312 in this embodiment is similar to that of Example 10. In other embodiments, an L-shaped bracket 312 similar to that of Example 11 may also be used.

[0257] In order to improve the stability of the large-capacity battery on the insulating support member 31, this embodiment further opens a threaded hole on the first bracket 3121 of the L-shaped plate, and fixes the first bracket 3121 of the L-shaped plate to the large-capacity battery by screw fastening.

[0258] As shown in FIG40 , it is a schematic structural diagram of a large-capacity battery assembly 32 of this embodiment; it includes a large-capacity battery 320 and the above-mentioned insulating support member 31 .

[0259] Different from the structure of the large-capacity battery in the above embodiment, this embodiment does not need to provide two support blocks 1 extending along the length direction of the housing on the housing bottom plate 04.

[0260] The specific assembly process can be seen in Figure 41:

[0261] Place the large-capacity battery on the support plate 3112. In order to insulate the insulating support member 31 from the large-capacity battery, an insulating gasket 323 may be provided between the support plate 3112 and the large-capacity battery. Then, use screws to fix the first bracket 3121 and the first side plate 3212 of the large-capacity battery housing.

[0262] In this embodiment, the battery cluster assembly includes a support frame 33 and the aforementioned large-capacity battery assembly 32 secured to the support frame 33 via insulating support members 31. The structure of the support frame 33 and the assembly process of the large-capacity battery assembly 32 and support frame 33 are identical to those of Example 10 and are not further described here.

Claims

1. A large-capacity battery assembly, characterized in that: including a large-capacity battery and an insulating support member; The large-capacity battery includes a housing and a plurality of single cells arranged in the housing; The insulating support member is fixed to the bottom plate of the housing and is insulated from the bottom plate of the housing, serving as a bottom support member for the large-capacity battery.

2. The large-capacity battery assembly according to claim 1, characterized in that: The insulating support member is an insulating support rod; A plurality of single cells are connected in parallel; the housing comprises a first barrel assembly and a first end plate and a second end plate respectively sealed and fixed to two opposite open ends of the first barrel assembly; the first barrel assembly comprises a first barrel body and a fixing mechanism; the first barrel body is surrounded by a housing top plate, a housing bottom plate and a first barrel side plate; a avoidance hole corresponding to each single cell pole is provided on the housing top plate; The bottom plate of the shell has a protrusion in the direction away from the top plate of the shell, which is used to form an electrolyte sharing chamber; the fixing mechanism includes two support blocks extending along the length direction of the first cylinder body and fixedly arranged on the outside of the bottom plate of the shell and on both sides of the electrolyte sharing chamber; a first hole for fixing an insulating support rod is opened in the support block and along the length direction of the support block; the insulating support rod is inserted into the first hole and fixed to the first cylinder body.

3. The large-capacity battery assembly according to claim 2, characterized in that: The first hole is a through hole penetrating the supporting block.

4. The large-capacity battery assembly according to claim 3, characterized in that: The first cylinder body and the support block are an integral piece.

5. The large-capacity battery assembly according to claim 2, characterized in that: The first cylinder body also includes a limit plate; the limit plate is located inside the first cylinder body, around the avoidance hole of the outer shell top plate, and extends along the length direction of the first cylinder body, and is used to limit the displacement of each single battery in the height direction of the first cylinder body.

6. The large-capacity battery assembly according to claim 5, characterized in that: The first cylinder body and the limiting plate are an integrated part.

7. The large-capacity battery assembly according to claim 2, characterized in that: A protrusion extending along the length direction of the first cylinder body and protruding in the width direction is provided at the long edge of the top plate of the shell, and the first cylinder body and the protrusion are an integral part.

8. The large-capacity battery assembly according to any one of claims 2 to 5, characterized in that: The housing top plate has a protrusion in a direction away from the housing bottom plate, forming a second channel as a gas chamber.

9. The large-capacity battery assembly according to claim 8, characterized in that: It also includes an insulating sleeve sleeved in the first hole and a supporting rod sleeved in the insulating sleeve.

10. The large-capacity battery assembly according to claim 9, characterized in that: The open end surface of the first cylinder body is provided with a step structure.

11. The large-capacity battery assembly according to claim 1, characterized in that: A plurality of single cells are connected in parallel; the housing comprises a second cylinder and a housing top plate and a housing bottom plate respectively sealed and fixed to two opposite open ends of the second cylinder, and the housing top plate is provided with avoidance holes for extending the polarity terminals of each single cell; The polarity terminals of each single cell extend out of the corresponding avoidance hole, and the top plate area of ​​the shell around the avoidance hole is fixedly sealed with the shell of the single cell; the bottom plate of the shell includes a flat plate and an electrolyte sharing chamber arranged on the flat plate, and the electrolyte sharing chamber is used to connect the electrolyte areas of the inner cavities of each single cell in the large-capacity battery.

12. The large-capacity battery assembly according to claim 11, characterized in that: The insulating support component comprises two support beams extending along the length direction of the shell bottom plate and respectively fixedly arranged on the shell bottom plate.

13. The large-capacity battery assembly according to claim 12, characterized in that: A protrusion extending along the length direction of the flat plate is provided on the flat plate, and the electrolyte sharing chamber is a liquid storage channel opened on the protrusion and extending along the length direction of the flat plate; two support beams are respectively located on both sides of the protrusion and fixed to the bottom plate area of ​​the shell on both sides of the protrusion.

14. The large-capacity battery assembly according to claim 13, characterized in that: The cross section of the support beam is U-shaped.

15. The large-capacity battery assembly according to claim 14, characterized in that: The support beam bottom plate is fixed to the shell bottom plate in a detachable manner.

16. The large-capacity battery assembly according to claim 15, characterized in that: The support beam bottom plate is fixed to the housing bottom plate by screws.

17. The large-capacity battery assembly according to claim 16, characterized in that: The support beam is made of metal material; the insulating support component also includes an insulating pad; the insulating pad is fixed between the support beam and the bottom plate of the shell; and an insulating sleeve is set on the part of the screw that contacts the support beam.

18. The large-capacity battery assembly according to claim 16 or 17, characterized in that: The shell bottom plate also includes rib plates respectively fixed to the shell bottom plate areas on both sides of the protrusion; the screw heads pass through the support beam bottom plate, the shell bottom plate and are connected with the rib plates.

19. The large-capacity battery assembly according to claim 17, characterized in that: The top plate of the housing is provided with an air flow channel extending along its length direction, serving as a gas chamber, and the gas chamber covers the gas ports on the tops of the individual cells.

20. The large-capacity battery assembly according to claim 1, characterized in that: The insulating support member includes a support member and two L-shaped brackets; the support member is used to be placed at the bottom of the large-capacity battery to support the large-capacity battery; the L-shaped bracket includes a first bracket and a second bracket, wherein the first bracket is parallel to the yz plane, and the second bracket is parallel to the xy plane, the first brackets of the two L-shaped brackets are respectively fixed at both ends of the support member, and the second brackets of the two L-shaped brackets are respectively used to fix the side beams opposite to the support frame; the support member of the insulating support member is located on the bottom plate of the outer shell, and the L-shaped bracket is located on both sides of the first side plate of the outer shell.

21. The large-capacity battery assembly according to claim 20, characterized in that: The supporting member and the L-shaped bracket are separate parts.

22. The large-capacity battery assembly according to claim 21, characterized in that: The supporting structure includes two first supporting ribs; the bottom plate of the outer shell is provided with two supporting blocks extending along the length direction of the outer shell; a channel for fixing the first supporting ribs is opened inside the supporting block and along the length direction of the supporting block, and the two first supporting ribs are respectively inserted into the corresponding channels to support the large-capacity battery.

23. The large-capacity battery assembly according to claim 22, characterized in that: The first supporting rib is insulated from the shell.

24. The large-capacity battery assembly according to claim 22, characterized in that: The L-shaped bracket is an L-shaped plate; the first bracket of one L-shaped plate is detachably fixed to one end of the two first support ribs, and the first bracket of the other L-shaped plate is detachably fixed to the other end of the two first support ribs.

25. The large-capacity battery assembly according to claim 22, characterized in that: The L-shaped bracket is two L-shaped support rods; the first brackets of the two L-shaped support rods are respectively fixed to the two ends of the same first support rib in a detachable manner, and the first brackets of the other two L-shaped support rods are respectively fixed to the two ends of another first support rib in a detachable manner.

26. The large-capacity battery assembly according to claim 20, characterized in that: The support member and the L-shaped bracket are an integrated part; the support member is a support plate adapted to the shape of the bottom of the large-capacity battery, and supports the large-capacity battery.

27. The large-capacity battery assembly according to claim 26, characterized in that: The large-capacity battery is placed on a support plate, and an insulating gasket is provided between the support plate and the bottom plate of the shell.

28. The large-capacity battery assembly according to claim 26, characterized in that: The L-shaped bracket is an L-shaped plate; the first bracket of one L-shaped plate is connected to one end of the support plate, the first bracket of the other L-shaped plate is connected to the other end of the support plate, and the first bracket of the L-shaped plate is also used to be fixedly connected to a large-capacity battery.

29. A cylinder assembly for a large-capacity battery, characterized in that: It includes a first cylinder body and a fixing mechanism; The first cylinder body is formed by a shell top plate, a shell bottom plate and a first cylinder side plate; the shell top plate is provided with avoidance holes corresponding to the poles of each single battery; The bottom plate of the outer shell has a protrusion in the direction away from the top plate of the outer shell, which is used to form an electrolyte sharing chamber; the fixing mechanism includes two support blocks extending along the length direction of the first cylinder body and fixedly arranged on the outside of the bottom plate of the outer shell and on both sides of the electrolyte sharing chamber; a first hole for fixing an insulating support member is provided in the support block along the length direction of the support block; the insulating support member is an insulating support rod.

30. The large-capacity battery cylinder assembly according to claim 29, characterized in that: The first hole is a through hole penetrating the supporting block.

31. The large-capacity battery cylinder assembly according to claim 28, characterized in that: The first cylinder body and the support block are an integral piece.

32. The large-capacity battery cylinder assembly according to claim 29, characterized in that: The first cylinder body also includes a limit plate; the limit plate is located inside the first cylinder body, around the avoidance hole of the outer shell top plate, and extends along the length direction of the first cylinder body, and is used to limit the displacement of each single battery in the height direction of the first cylinder body.

33. The large-capacity battery cylinder assembly according to claim 32, characterized in that: The first cylinder body and the limiting plate are an integrated part.

34. The large-capacity battery cylinder assembly according to claim 29, characterized in that: A protrusion extending along the length direction of the first cylinder body and protruding in the width direction is provided at the long edge of the top plate of the shell, and the first cylinder body and the protrusion are an integral part.

35. The cylinder assembly for a large-capacity battery according to any one of claims 29 to 34, characterized in that: The housing top plate has a protrusion in a direction away from the housing bottom plate, forming a second channel as a gas chamber.

36. The large-capacity battery cylinder assembly according to claim 35, characterized in that: It also includes an insulating sleeve sleeved in the first hole and a supporting rod sleeved in the insulating sleeve.

37. The large-capacity battery cylinder assembly according to claim 36, characterized in that: The open end surface of the first cylinder body is provided with a step structure.

38. A housing bottom plate assembly for a large-capacity battery, characterized in that: The housing comprises a bottom plate and an insulating support member; the bottom plate comprises a flat plate and an electrolyte sharing chamber arranged on the flat plate, and the electrolyte sharing chamber is used to connect the electrolyte areas of the inner cavities of each single cell in the large-capacity battery; The insulating support member is fixed on the bottom plate of the housing, insulated from the bottom plate of the housing, and serves as a bottom support member for the large-capacity battery.

39. The housing bottom plate assembly for a large-capacity battery according to claim 38, characterized in that: The insulating support component comprises two support beams extending along the length direction of the shell bottom plate and respectively fixedly arranged on the shell bottom plate.

40. The housing bottom plate assembly for a large-capacity battery according to claim 39, characterized in that: A protrusion extending along the length direction of the flat plate is provided on the flat plate, and the electrolyte sharing chamber is a liquid storage channel opened on the protrusion and extending along the length direction of the flat plate; two support beams are respectively located on both sides of the protrusion and fixed to the bottom plate area of ​​the shell on both sides of the protrusion.

41. The housing bottom plate assembly for a large-capacity battery according to claim 40, characterized in that: The cross section of the support beam is U-shaped.

42. The housing bottom plate assembly for a large-capacity battery according to claim 41, characterized in that: The support beam bottom plate is fixed to the shell bottom plate in a detachable manner.

43. The housing bottom plate assembly for a large-capacity battery according to claim 42, characterized in that: The support beam bottom plate is fixed to the housing bottom plate by screws.

44. The housing bottom plate assembly for a large-capacity battery according to claim 43, characterized in that: The support beam is made of metal material; the insulating support component also includes an insulating pad; the insulating pad is fixed between the support beam and the bottom plate of the shell; and an insulating sleeve is set on the part of the screw that contacts the support beam.

45. The housing bottom plate assembly for a large-capacity battery according to claim 43 or 44, characterized in that: It also includes ribs fixed to the bottom plate areas of the shell on both sides of the raised portion; the screw heads pass through the bottom plate of the support beam and the bottom plate of the shell to be connected with the ribs.

46. ​​An insulating support member, characterized in that: It includes a supporting member and two L-shaped brackets; the supporting member is used to be placed at the bottom of a large-capacity battery to support the large-capacity battery; the L-shaped bracket includes a first bracket and a second bracket, wherein the first bracket is parallel to the yz plane, and the second bracket is parallel to the xy plane, and the first brackets of the two L-shaped brackets are respectively fixed to the two ends of the supporting member, and the second brackets of the two L-shaped brackets are respectively used to fix the side beams opposite to the supporting frame.

47. The insulating support member according to claim 46, characterized in that: The supporting member and the L-shaped bracket are separate parts.

48. The insulating support member according to claim 47, characterized in that: The supporting member includes two first supporting ribs, which are respectively used to be inserted into two channels at the bottom of the large-capacity battery to support the large-capacity battery.

49. The insulating support member according to claim 48, characterized in that: The L-shaped bracket is an L-shaped plate; the first bracket of one L-shaped plate is detachably fixed to one end of the two first support ribs, and the first bracket of the other L-shaped plate is detachably fixed to the other end of the two first support ribs.

50. The insulating support member according to claim 48, characterized in that: The L-shaped bracket is two L-shaped support rods; the first brackets of the two L-shaped support rods are respectively fixed to the two ends of the same first support rib in a detachable manner, and the first brackets of the other two L-shaped support rods are respectively fixed to the two ends of another first support rib in a detachable manner.

51. The insulating support member according to claim 46, characterized in that: The support member and the L-shaped bracket are an integrated part; the support member is a support plate adapted to the shape of the bottom of the large-capacity battery, and supports the large-capacity battery.

52. The insulating support member according to claim 51, characterized in that: The L-shaped bracket is an L-shaped plate; the first bracket of one L-shaped plate is connected to one end of the support plate, the first bracket of the other L-shaped plate is connected to the other end of the support plate, and the first bracket of the L-shaped plate is also used to be fixedly connected to a large-capacity battery.

53. A battery pack assembly, characterized in that: A large-capacity battery assembly according to any one of claims 20 to 28 comprising a support frame and the battery assembly being fixed to the support frame via an insulating support member.

54. The battery pack assembly according to claim 53, characterized in that: The supporting frame is a rectangular frame, comprising a U-shaped frame and a first beam fixed to an open end of the U-shaped frame in a detachable connection manner.

55. The battery pack assembly according to claim 54, characterized in that: The U-shaped frame includes a second beam and a third beam respectively fixed at both ends of the second beam; The first beam and the second beam are I-shaped steels, and the second bracket of the insulating support member is fixed on the upper wing plate of the I-shaped steel.

Images