CN221327916U - Barrel assembly for high-capacity battery and high-capacity battery - Google Patents

Abstract

The utility model provides a cylinder assembly for a high-capacity battery and the high-capacity battery, and solves the problems that the supporting stability of the related high-capacity battery is poor and the process of assembling energy storage equipment based on the related high-capacity battery is complex. The cylinder assembly comprises a cylinder main body and a fixing mechanism; the fixing mechanism comprises two supporting blocks which extend along the length direction of the cylinder body and are respectively and fixedly arranged outside the cylinder bottom plate and at two sides of the electrolyte sharing chamber; a first hole for fixing the insulation supporting rod is formed in the supporting block along the length direction of the supporting block. The size of the supporting surface at the bottom of the cylinder body is larger in the y direction, so that a large-capacity battery with the cylinder body assembly can be stably placed; meanwhile, when the high-capacity battery is assembled into the energy storage equipment, only the extension end of the insulation support rod is required to be fixed with the support frame of the energy storage box body, and the operation is simple and convenient.

Description

Barrel assembly for high-capacity battery and high-capacity battery

Technical Field

The utility model belongs to the field of batteries, and particularly relates to a cylinder assembly for a high-capacity battery and the high-capacity battery.

Background

In the market, a plurality of single batteries are connected in parallel or in series to form a large-capacity battery (also called a battery module or a battery pack).

However, in the existing large-capacity battery, each single battery has a difference, and due to the existence of the barrel effect, the single battery with the worst performance is often affected, so that the upper limit of the capacity and the cycle number of the whole large-capacity battery are extremely limited. Therefore, how to improve the uniformity of each single battery in the large-capacity battery becomes an important point and a difficult point of research in the field.

In order to solve the above-mentioned problems, the related art proposes a large-capacity battery including a case and a plurality of unit cells, as shown in fig. 1 and 2; the multiple single batteries are placed in the shell in parallel, the shell is composed of a cylinder body and end plates 01 fixed at two ends of the cylinder body, through holes 03 are formed in the cylinder body top plate 02 corresponding to the polar posts of the single batteries, and the shell area corresponding to the through holes 03 is fixedly sealed with the single battery shell.

The barrel bottom plate 04 is provided with a protruding part in the direction far away from the top plate to form a first channel, the first channel is used as an electrolyte sharing chamber 05, the electrolyte sharing chamber 05 is communicated with electrolyte areas of inner cavities of all the single batteries, all the single batteries can be in a unified electrolyte environment through the electrolyte sharing chamber 05, uniformity of electrolyte in all the single batteries is ensured, and performance and cycle life of the high-capacity battery are improved.

The cylinder top plate 02 may further have a protruding portion in a direction away from the bottom plate, forming a second channel, and the gas chamber 06 is used as a gas chamber 06, where the gas chamber 06 covers the top gas port of each single battery in the large-capacity battery. Here, the gas port includes the following two meanings:

1) The gas port is a through hole 03 which is directly arranged on the upper cover plate of the single battery and penetrates through the inner cavity of the single battery;

At this time, the inner cavity of the gas chamber 06 is communicated with the gas areas of the inner cavities of the single batteries through the gas port, the gas chamber 06 is used as a gas sharing chamber of the single batteries, the gas areas of the single batteries can be communicated based on the gas chamber 06 to achieve gas balance, so that the gas sharing of the single batteries ensures the consistency of the single batteries, and the cycle life of the large-capacity battery is improved to a certain extent; when any single battery is out of control, the flue gas in the inner cavity of the single battery enters the gas chamber 06 and is discharged through the gas chamber 06, so that the safety of the high-capacity battery is improved.

2) The gas port is an explosion venting port or an explosion prevention port arranged on the upper cover plate of the single battery, and an explosion venting membrane is arranged at the explosion venting port or the explosion prevention port;

At this time, the gas chamber 06 is used as an explosion venting channel, and when the explosion venting membrane at the gas port of any single battery is broken by the inner cavity smoke, the smoke in the inner cavity of the single battery is discharged through the gas chamber 06, so that the safety of the high-capacity battery is improved.

However, in the practical use process, when the high-capacity battery is used as an energy storage device alone, the size of the bottom supporting surface (the outer bottom surface of the electrolyte sharing chamber 05) in the y direction (the width direction of the cylinder) is smaller, and the stability is poor and the strength is not ideal when the high-capacity battery is used as the supporting surface; in addition, when the energy storage device is assembled based on the high-capacity battery, generally, the areas of the bottom of the cylinder body, which are positioned at two sides of the electrolyte sharing chamber 05, are used as supporting surfaces, and an insulating pad is required to be additionally arranged between the supporting surfaces and the energy storage box body supporting frame, or insulation treatment is required to be performed on the supporting surfaces; making the process of assembling the energy storage device based on such a large-capacity battery more complicated.

Disclosure of utility model

The utility model aims to provide a cylinder assembly for a high-capacity battery and the high-capacity battery, and solves the problems that the supporting stability of the related high-capacity battery is poor and the process of assembling energy storage equipment based on the same is complex.

The utility model provides a cylinder assembly for a high-capacity battery, which is characterized in that: comprises a cylinder body and a fixing mechanism;

The cylinder body is formed by enclosing a cylinder top plate, a cylinder bottom plate and a cylinder side plate;

the cylinder top plate is provided with through holes which are in one-to-one correspondence with the electrode posts of all the single batteries;

The bottom plate of the cylinder body is provided with a bulge part in the direction far away from the top plate of the cylinder body, so as to form an electrolyte sharing chamber;

The fixing mechanism comprises two supporting blocks which extend along the length direction of the cylinder body and are respectively and fixedly arranged outside the cylinder bottom plate and at two sides of the electrolyte sharing chamber; a first hole for fixing the insulation supporting rod is formed in the supporting block along the length direction of the supporting block.

According to the utility model, the fixing mechanism is additionally arranged at the bottom of the cylinder body, so that the size of the supporting surface of the bottom of the cylinder body in the y direction (the width direction of the cylinder body) is increased, and a large-capacity battery with the cylinder body assembly can be stably placed; simultaneously, offer the first hole that is used for fixed insulating bracing piece at fixed establishment, through inserting first hole with insulating bracing piece, make insulating bracing piece and barrel fixed to make the terminal surface that extends the barrel at insulating bracing piece's both ends, with extend the end as the fixed supporting part of support frame with the energy storage box, when assembling into energy storage equipment based on this kind of large capacity battery, only need extend the end with the support frame of energy storage box fixed can, easy operation is convenient.

In order to support the high-capacity battery for a long time and effectively, the first hole is a through hole penetrating the support block.

Further, the main body of the cylinder body and the supporting block are integrated, and can be integrally formed by adopting an aluminum extrusion process.

Compared with the scheme of directly fixing the insulating support rod on the cylinder body, the support block with the first hole is integrally formed, the insulating support rod is fixed in the first hole, the support structure is good in strength and long in service life, and especially for the structure that the first hole is a through hole, the contact area of the support rod and the cylinder body is maximum, and the support strength is best. And the integral part is higher in structural stability relative to the split part, and the processing is more convenient.

If the cylinder body and the supporting block are split pieces, compared with the utility model, firstly, the connecting strength of the supporting block and the cylinder body is weaker, and the supporting block is easy to separate from the cylinder body after being used for a longer time; secondly, if the supporting block is connected with the main body of the cylinder body by adopting a conventional welding or screw connection mode, the tightness of the connection part cannot be ensured, and when the cylinder body is applied to a high-capacity battery, the leakage of electrolyte in the cylinder body or the entering of external air into the cylinder body can be caused, so that the high-capacity battery is invalid.

Further, in order to ensure the stability of each single battery in the cylinder, the cylinder assembly for the high-capacity battery further comprises a limiting plate arranged in the cylinder main body; the limiting plate is positioned in the peripheral area of the through hole of the cylinder top plate and extends along the length direction of the cylinder; for restricting the displacement of each single battery in the height direction of the cylinder. The cylinder body and the limiting plate can be an integral piece.

In order to further optimize the barrel structure, the long edge of the barrel top plate is provided with a bulge which extends along the length direction of the barrel and protrudes in the width direction, so that the area of the peripheral area of the through hole of the barrel top plate is enlarged, and the peripheral area of the through hole and the single battery shell are easy to seal. The cylinder body and the bulge can also be an integral piece.

Further, the cylinder top plate has a protruding portion in a direction away from the cylinder bottom plate, forming a second channel as a gas chamber.

Further, the cylinder for the high-capacity battery further comprises an insulating sleeve sleeved in the first hole and a supporting rod sleeved in the insulating sleeve.

Further, in order to facilitate the installation of the end plates at the two ends of the cylinder body, a step structure is arranged on the end face of the open end of the cylinder body.

The utility model also provides a high-capacity battery, which is characterized in that: the battery pack comprises a shell and a plurality of parallel single batteries arranged in the shell, wherein the shell comprises a cylinder body, a first end plate and a second end plate which are respectively fixed at two opposite open ends of the cylinder body in a sealing mode, and the cylinder body is the cylinder body component for the high-capacity battery.

The beneficial effects of the utility model are as follows:

1. According to the utility model, the fixing mechanism is additionally arranged at the bottom of the cylinder body, so that the size of the supporting surface of the bottom of the cylinder body in the y direction (the width direction of the cylinder body) is increased, and a large-capacity battery with the cylinder body assembly can be stably placed; simultaneously, offer the first hole that is used for fixed insulating bracing piece at fixed establishment, through inserting first hole with insulating bracing piece, make insulating bracing piece and barrel fixed to make the terminal surface that extends the barrel at insulating bracing piece's both ends, with extend the end as the fixed supporting part of support frame with the energy storage box, when assembling into energy storage equipment based on this kind of large capacity battery, only need extend the end with the support frame of energy storage box fixed can, easy operation is convenient.

2. According to the utility model, the first hole is set as the through hole, so that the contact area of the supporting rod and the cylinder body can be greatly increased, and further the supporting strength, the supporting stability and the supporting durability of the supporting rod to the high-capacity battery with the cylinder body are improved.

3. The utility model adopts the aluminum extrusion process to integrally form the cylinder body, and has simple processing process, high connection reliability of the supporting block and the bottom plate of the cylinder body and better structural tightness and stability compared with a split structure.

Drawings

Fig. 1 is a schematic view of a structure of a large-capacity battery in the related art;

FIG. 2 is a schematic view of a high capacity battery can according to the prior art;

FIG. 3 is a schematic view of the structure of the barrel in example 1;

FIG. 4 is a schematic view of the end face structure of the cylinder in example 2;

FIG. 5 is a schematic view of the structure of a barrel in embodiment 3;

FIG. 6 is a schematic view of the end face structure of the cylinder in example 3;

FIG. 7 is a schematic view of the structure of a cylinder in example 4;

FIG. 8 is a schematic view of the structure of a cylinder in example 5;

FIG. 9 is a schematic view showing another structure of the cylinder in embodiment 5;

The reference numerals in the drawings are:

01. An end plate; 02. a cylinder top plate; 03. a through hole; 04. a cylinder bottom plate; 05. an electrolyte sharing chamber; 06. a gas chamber; 1. a support block; 2. a first hole; 3. a limiting plate; 4. a protrusion; 5. a support rod; 6. an insulating sleeve; 7. a step structure; 8. an insulating gasket; 9. a heat transfer connection; 10. the inner bottom surface of the cylinder body.

Detailed Description

So that the manner in which the above recited objects, features and advantages of the present utility model can be understood in detail, a more particular description of the utility model, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by "top, bottom" or the like in terms are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first, second, third, fourth, etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Example 1

The present embodiment is a barrel assembly, which can be used as a barrel of the high-capacity battery in the background art, and its structure is shown in fig. 3, and for convenience of description, the length direction of the barrel assembly may be defined as the x direction, the width direction of the barrel assembly may be defined as the y direction, and the height direction of the barrel assembly may be defined as the z direction.

Unlike the cartridges shown in fig. 1 and 2, this embodiment is provided with support blocks 1 in the outer regions of the cartridge bottom plate 04 on both sides of the electrolyte sharing chamber 05, respectively, the support blocks 1 extending in the x-direction. As can be seen from the figure, a first hole 2 is made in the x-direction in the support block 1. Compared with fig. 1 and 2, the bottom of the cylinder in the y direction of the embodiment has larger dimension, so that the cylinder has better stability when placed.

In this embodiment, the first hole 2 is a through hole, and penetrates the supporting block 1 in the x direction; the insulation support rod with the length larger than that of the cylinder and the section matched with the section of the first hole 2 can be inserted into the through hole of the support block 1, and the two ends of the insulation support rod are ensured to extend out of the end face of the cylinder. When the high-capacity battery with the barrel assembly is assembled into the energy storage equipment, two ends of the insulation supporting rod can be used as supporting parts and fixed with the supporting frame of the energy storage box body, the operation is simple and convenient, and meanwhile, the stability of the high-capacity battery in the energy storage box body can be improved.

In this embodiment, the cylinder assembly may be integrally formed by an aluminum extrusion process, and the cylinder formed by the aluminum extrusion process is equal to the support block 1 in size and the cylinder in size in the x direction, and the end face of the support block 1 and the end face of the cylinder are located on the same plane. In order to make the above-mentioned cylinder have comparatively regular structure, in y direction, the size of supporting shoe 1 is equal with the regional size of barrel bottom plate 04 of electrolyte sharing cavity 05 both sides, and the outer bottom of supporting shoe 1 is located the coplanar with the outer bottom of electrolyte sharing cavity 05, and in z direction, the size of supporting shoe 1 is equal with electrolyte sharing cavity 05 lateral wall size, and the lateral wall of supporting shoe 1 is located the coplanar with the barrel lateral wall. The region of the bottom plate 04 of the cylinder on both sides of the electrolyte sharing chamber 05 is the region a in fig. 3.

It can also be understood that the embodiment adopts an aluminum extrusion process to integrally form the cylinder with the following structure:

The two ends of the cylinder body are open ends; the inner bottom surface is provided with two bosses which are the same as the length of the cylinder body, extend along the x direction and are distributed along the y direction, the top surfaces of the bosses are supporting surfaces of all the single batteries, and a first channel is formed between the two bosses along the y direction and is used as an electrolyte sharing chamber 05; the first hole 2 is formed in the boss in the x direction.

In other embodiments, the first hole 2 may be a blind hole, and preferably blind holes extending along the x direction are formed at two ends of the supporting block 1 respectively; a plurality of insulation support rods with the length smaller than that of the cylinder and the section matched with the section of the first hole 2 can be respectively inserted into the blind holes, and the two ends of each insulation support rod extend out of the end face of the cylinder; and the two ends of the insulation supporting rod can be used as supporting parts and are fixed with the supporting frame of the energy storage box body. But for the through-hole 03 structure, the contact area of the insulating support rod and the large-capacity battery is smaller, and thus the support strength is weaker. The cylinder assembly can be formed by combining an aluminum extrusion process and a drilling process, for example, a semi-finished cylinder without blind holes on the supporting block 1 can be formed by adopting the aluminum extrusion process, and then the blind holes are formed on the supporting block 1 by adopting the drilling process. However, the process is relatively complicated in comparison with the present embodiment.

In other embodiments, the supporting block 1 and the cylinder may be separate components, and the supporting block 1 is fixed on the outer surface of the bottom plate 04 of the cylinder and on two sides of the electrolyte sharing chamber 05 by welding or screw connection, but compared with the present embodiment, the processing procedure is complicated, and in addition, the tightness of the connection part cannot be ensured, when such a cylinder is applied to a high-capacity battery, the electrolyte in the cylinder leaks, or external air enters the cylinder, so that the high-capacity battery fails.

Example 2

Unlike embodiment 1, this embodiment adds a limiting plate 3 on the basis of embodiment 1;

As shown in fig. 4, in this embodiment, two limiting plates 3 extending along the x direction are provided on the inner surface of the top plate 02 of the barrel of embodiment 1, and the size of the limiting plates 3 in the z direction should satisfy: the distance between the bottom surface of the limiting plate 3 and the inner bottom surface 10 of the cylinder body should be slightly greater than the distance between the lower cover plate and the upper cover plate of each single battery.

When each single battery is arranged in the cylinder body, the upper cover plate of each single battery is slightly contacted with the bottom surface of the limiting plate 3, and a small gap can be formed, so that each single battery is ensured not to generate serious displacement along the z direction in the cylinder body; if the distance between the bottom surface of the limiting plate 3 and the inner bottom surface 10 of the cylinder body is smaller than the distance between the lower cover plate and the upper cover plate of each single battery in the z direction. It will result in that each cell cannot be mounted in the can, and if the distance between the bottom surface of the limiting plate 3 and the inner bottom surface 10 of the can body in the z direction is much greater than the distance between the lower cover plate and the upper cover plate of each cell. The limit function in the z direction cannot be achieved. Considering that the machining error of each single battery may cause the distances between the lower cover plate and the upper cover plate of each single battery to be not completely consistent, in order to ensure that all groups of single batteries can be smoothly assembled into the cylinder assembly, the distance between the bottom surface of the limiting plate 3 and the inner bottom surface 10 of the cylinder body should be slightly larger than the maximum distance between the lower cover plate and the upper cover plate; of course, when screening each single battery, the single batteries with larger distance deviation between the lower cover plate and the upper cover plate are prevented from being grouped as much as possible.

The limiting plate 3 cannot block the through hole 03 in the cylinder top plate 02.

The limiting plate 3 can be integrally extruded with the cylinder in the process of extruding the cylinder, and the processing process is simple and convenient.

In other embodiments, one of the limiting plates 3 having the above-described structure extending in the x-direction may be provided on the inner surface of the cylinder top plate 02 of embodiment 1, but the limitation of each unit cell in the z-direction is not balanced with respect to the present embodiment.

Example 3

Unlike embodiment 1 and embodiment 2, this embodiment adds the protrusion 4 on the basis of embodiment 1 or embodiment 2.

As shown in fig. 5 and 6, the present embodiment is provided with a projection 4 extending in the x-direction and projecting in the y-direction at the long edge of the cylinder top plate 02. The bulge 4 is connected with the side wall of the cylinder body in a smooth transition manner.

The cartridge top plate 02 of the present embodiment is larger in size in the y direction than the above embodiment.

On the one hand, the area of the cylinder top plate 02 on both sides of the through hole 03 can be enlarged, and the temperature of the entire large-capacity battery can be adjusted by adding a heat transfer connection member (see fig. 1) or a pole adapter member to be connected to each of the battery poles. The larger the area is, the larger the heat transfer connecting piece or the pole adapter piece with larger size can be correspondingly arranged, and the larger the heat transfer connecting piece or the pole adapter piece with larger size has larger heat exchange area, so that better heat exchange effect can be obtained.

The heat transfer connector 9 may be configured as shown in fig. 1, and is an elongated member for connecting with the positive electrode or the negative electrode of each unit cell; and, the elongated member is provided with a clamping portion for mounting the heat transfer tube in the axial direction. The positive electrodes or the negative electrodes of the plurality of single batteries are connected through the heat transfer connecting piece, and the heat transfer pipe is clamped on the heat transfer connecting piece, so that the local temperature of the pole column on each single battery can be controlled, and the occurrence of thermal runaway phenomenon caused by overhigh temperature of the pole column is greatly reduced. The pole adapter may be an electrical bus disclosed in chinese patent CN116130892 a.

On the other hand, when the areas on the two sides of the through hole 03 are larger, the cylinder area around the through hole 03 is convenient to fix and seal with the single battery shell. If a sealing connecting piece can be additionally arranged between the through hole 03 and the pole, the sealing connecting piece comprises a hollow component; the bottom of the hollow component is used for being in sealing connection with a first area of the single battery, and the top of the hollow component is in sealing connection with a second area of the cylinder top plate 02; the first area is an area positioned at the periphery of any pole in the upper cover plate of any single battery; the second area is the peripheral area of the outer surface of the cylinder top plate 02 corresponding to any through hole 03 on the cylinder. The area around the pole is the area around the insulating sealing pad on the pole. The insulating sealing gasket is a part used for insulating between the pole and the upper cover plate on the single battery.

When the areas on both sides of the through hole 03 are large, the top of the hollow member is conveniently connected with the second area of the cylinder top plate 02 in a sealing manner.

The bulge 4 can be integrally extruded with the cylinder body in the process of extruding the cylinder body, and the processing process is simple and convenient.

Example 4

Unlike the above embodiments, in this embodiment, the gas chamber 06 is further provided in the cylinder top plate 02 in addition to any of the above embodiments.

As can be seen from fig. 7, the cylinder top plate 02 of the present embodiment protrudes in a direction away from the cylinder bottom plate 04, forming a second passage as the gas chamber 06. The gas chamber 06 can be integrally extruded with the cylinder in the process of extruding the cylinder, and the processing process is simple and convenient.

Example 5

Unlike the above embodiments, this embodiment is based on any of the above embodiments in which an insulating support rod is inserted into the first hole 2.

In this embodiment, the first hole 2 is taken as an example of a through hole, and as can be seen from fig. 8, the two ends of the insulating support rod extend out of the first hole 2, so that in order to fix the insulating support rod with the support frame of the energy storage box body, a threaded hole can be formed at the extending part of the insulating support rod.

As can be seen from the figure, the cross section of the first hole 2 in the embodiment is rectangular, so that the insulating support rod with the rectangular cross section has good matching stability while being convenient to process; in other embodiments, four insulating support rods with shorter length can be inserted into the positions of the two through holes of the support block 1, which are close to the end parts of the through holes, respectively, but compared with the embodiment, the contact area between the insulating support rods and the large-capacity battery is smaller, so that the support strength is weaker.

The insulation support rod of the embodiment comprises a support rod 5 made of metal and an insulation sleeve 6 sleeved outside the support rod 5, wherein the support rod 5 can be made of iron or stainless steel; the insulating sleeve 6 may be PP or PE; the insulating sleeve 6 can isolate the supporting rod 5 from the cylinder body to realize insulation between the supporting rod 5 and the cylinder body, and the supporting strength is high and the cost is low while the insulating sleeve has good insulating performance. In order to further ensure insulation between the support rod 5 and the cylinder, as shown in fig. 9, an insulating washer 8 may be sleeved on the portion of the support rod 5 extending into the first hole 2, and the insulating washer 8 is in press fit with the end surface of the first hole 2, and may be implemented in an adhesive manner.

During assembly, the insulating sleeve 6 is inserted into the first hole 2, and then the supporting rod 5 is inserted into the insulating sleeve 6.

In other embodiments, the insulating support rod may be a support rod 5 made of a hard insulating material, such as a mica material or a polymer material, which has a higher cost than the present embodiment. The support rod 5 made of metal can be selected, but an insulating film needs to be coated on the surface of the support rod 5, compared with the embodiment, the process is complex, the cost is high, and the insulating performance is unreliable when the uniformity of the film layer is poor.

Example 6

Unlike the above embodiments, this embodiment is provided with a step structure 7 on the open end face of the cylinder body on the basis of any of the above embodiments. Referring to fig. 8, the two step surfaces of the step structure 7 can be used as the mating surfaces with the end plates 01 at the two ends of the cylinder.

Example 7

The embodiment is a high-capacity battery, including a housing and a plurality of parallel single batteries arranged in the housing, the housing includes a cylinder, and a first end plate and a second end plate respectively sealed and fixed at two opposite open ends of the cylinder, and the cylinder is any cylinder component in the above embodiment.

Claims (10)

1. A cartridge assembly for a high capacity battery, characterized in that: comprises a cylinder body and a fixing mechanism;

The cylinder body is formed by enclosing a cylinder top plate (02), a cylinder bottom plate (04) and a cylinder side plate;

Through holes (03) corresponding to the single battery poles one by one are formed in the cylinder top plate (02);

The barrel bottom plate (04) is provided with a bulge part in a direction far away from the barrel top plate (02) to form an electrolyte sharing chamber (05);

The fixing mechanism comprises two supporting blocks which extend along the length direction of the cylinder body and are respectively and fixedly arranged outside the cylinder bottom plate (04) and at two sides of the electrolyte sharing chamber (05); a first hole (2) for fixing the insulation support rod is formed in the support block (1) along the length direction of the support block (1).

2. The cartridge assembly for a large-capacity battery according to claim 1, wherein: the first hole (2) is a through hole (03) penetrating through the supporting block (1).

3. The cartridge assembly for a large-capacity battery according to claim 2, wherein: the cylinder body and the supporting block (1) are integrated.

4. The cartridge assembly for a large-capacity battery according to claim 1, wherein: the cylinder body also comprises a limiting plate (3); the limiting plate (3) is positioned in the cylinder body and in the peripheral area of the through hole (03) of the cylinder top plate (02) and extends along the length direction of the cylinder body, and is used for limiting the displacement of each single battery in the height direction of the cylinder body.

5. The cartridge assembly for a large-capacity battery according to claim 4, wherein: the cylinder body and the limiting plate (3) are integrated.

6. The cartridge assembly for a large-capacity battery according to claim 1, wherein: the long edge of the cylinder top plate (02) is provided with a bulge (4) extending along the length direction of the cylinder body and protruding in the width direction, and the cylinder body and the bulge (4) are integrated.

7. The cartridge assembly for a large-capacity battery according to any one of claims 1 to 6, wherein: the cylinder top plate (02) is provided with a bulge part in a direction far away from the cylinder bottom plate (04) to form a second channel as a gas chamber (06).

8. The cartridge assembly for a large-capacity battery according to claim 7, wherein: the device also comprises an insulating sleeve (6) sleeved in the first hole (2) and a supporting rod (5) sleeved in the insulating sleeve (6).

9. The cartridge assembly for a large-capacity battery according to claim 8, wherein: the open end face of the cylinder body is provided with a step structure (7).

10. A high capacity battery characterized by: the battery pack comprises a shell and a plurality of parallel single batteries arranged in the shell, wherein the shell comprises a cylinder body, a first end plate and a second end plate which are respectively fixed at two opposite open ends of the cylinder body in a sealing mode, and the cylinder body is a cylinder body assembly for the high-capacity battery according to any one of claims 1-9.