CN221727328U

CN221727328U - A large capacity battery

Info

Publication number: CN221727328U
Application number: CN202323324752.7U
Authority: CN
Inventors: 陈孟奇; 雷政军
Original assignee: Shuang'ao Energy Storage Technology Xi'an Co ltd
Current assignee: Shuang'ao Energy Storage Technology Xi'an Co ltd
Priority date: 2023-12-07
Filing date: 2023-12-07
Publication date: 2024-09-17
Anticipated expiration: 2033-12-07

Abstract

The utility model belongs to the field of batteries, and particularly relates to a high-capacity battery. The problem that the existing high-capacity battery sharing pipeline assembly is difficult to assemble is solved. The high-capacity battery comprises a shell, a plurality of single batteries and a liquid cooling pipe; the plurality of single batteries are arranged in the shell along the same direction; the shell is provided with a shared cavity communicated with the inner cavities of all the single batteries; the top plate of the shell is provided with an avoidance hole; each single battery pole extends out of the avoidance hole, and the shell top plate area corresponding to the avoidance hole is fixedly sealed with the single battery shell; each single battery pole is provided with a liquid cooling pipe clamping part; the liquid cooling pipe main body is fixed at the liquid cooling pipe clamping part; an insulating sealant layer is paved on the top plate of the shell; the electric connection part of each single battery pole extends out of the insulating sealing glue layer, and the liquid inlet end and the liquid outlet end of the liquid cooling pipe extend out of the insulating sealing glue layer. The shared cavity is not required to be spliced, so that the requirement on processing precision is low; and through setting up insulating seal glue film, can prevent the condition emergence of battery short circuit.

Description

High-capacity battery

Technical Field

The utility model belongs to the field of batteries, and particularly relates to a 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).

Chinese patent CN 219144456U discloses a high-capacity battery, whose structure is shown in fig. 1, comprising a battery pack main body formed by connecting several single batteries in parallel and a shared pipeline assembly located at the bottom of the battery pack main body; and the shared pipeline component is used for completely penetrating the inner cavities of the plurality of single batteries so that all the single batteries in the large-capacity battery are in an electrolyte system. The high-capacity battery can strengthen the uniformity of electrolyte of each single battery in the high-capacity battery through the shared pipeline assembly, improve the cycle life, supplement electrolyte for the high-capacity battery through the shared pipeline assembly, prolong the service life of the high-capacity battery, and improve the use safety of the high-capacity battery.

However, the shared pipeline assembly is formed by directly performing sealing and splicing on the multi-section sub pipeline 01 and the intermediate connecting pipe 02 in interference fit; at this time, the multi-section sub-pipelines 01 are arranged on the lower cover plate 03 of the single battery one by one, extend along the arrangement direction of the single battery 2, are integrally extruded with the lower cover plate 03 of the single battery, and are communicated with the openings of the lower cover plate 03 of the single battery.

During assembly, two ends of the sub-pipeline 01 are used as connecting ends of the middle connecting pipe 02, and when the two single batteries 2 are connected, one ends of the sub-pipelines on the two single batteries 2 are respectively extruded into the two ends of the middle connecting pipe 02.

The shared pipeline assembly requires the coaxiality of each sub pipeline 01 and the intermediate connecting pipe 02 in the plugging process to realize effective connection, but the coaxiality of each sub pipeline and the intermediate connecting pipe 02 is difficult to ensure due to the following reasons:

1) The sub-pipelines and the lower cover plate are integrated, if the positions of the sub-pipelines on the lower cover plate are slightly deviated on each integrated part, or the sizes of the sub-pipelines are slightly deviated, the coaxiality of the sub-pipelines is deviated when the sub-pipelines are spliced;

2) When the integrated piece is welded with the cylinder, the situation that the positions of the sub pipelines relative to the cylinder are inconsistent can possibly occur due to the difference of welding processes, and therefore, the coaxiality of each sub pipeline is deviated when the sub pipelines are spliced;

3) According to the scheme, when the plug-in type pipeline is plugged, a special tool is needed, and due to improper use of the tool or a slight carelessness of constructors, the coaxiality of each sub pipeline is deviated;

In addition, when in plugging, the deviation among the sub-pipelines can be increased along with the increase of the plugging quantity, so that the coaxiality among the sub-pipelines is more difficult to ensure as the plugging quantity is increased; resulting in a decrease in yield with an increase in the number of pins during assembly.

In summary, in this scheme, because the sub-pipelines of two adjacent single batteries are difficult to be coaxial, when grafting, the sub-pipeline may be caused to displace relative to the lower cover plate, or the lower cover plate may be caused to displace relative to the cylinder, and further the battery is damaged.

Disclosure of utility model

The utility model aims to provide a high-capacity battery, which solves the problem that the existing high-capacity battery sharing pipeline assembly is difficult to assemble.

The technical scheme of the utility model is to provide a high-capacity battery, which is characterized in that: comprises a shell, a plurality of single batteries and a liquid cooling pipe; the plurality of single batteries are arranged in the shell along the same direction;

The shell is provided with a sharing cavity, and the inner cavity of the sharing cavity is communicated with the inner cavities of all the single batteries;

The top plate of the shell is provided with avoidance holes corresponding to the polar posts of the single batteries; each single battery pole extends out of the avoidance hole, and the shell top plate area corresponding to the avoidance hole is fixedly sealed with the single battery shell;

the part of each single battery pole extending out of the avoidance hole is provided with a liquid cooling pipe clamping part;

The liquid cooling pipe comprises a liquid cooling pipe main body, a liquid inlet end and a liquid outlet end of the liquid cooling pipe, and the liquid cooling pipe main body is fixed on the liquid cooling pipe clamping part;

An insulating sealant layer is paved on the top plate of the shell; the electric connection part of each single battery pole extends out of the insulating sealing glue layer, and the liquid inlet end and the liquid outlet end of the liquid cooling pipe extend out of the insulating sealing glue layer.

According to the utility model, a plurality of single batteries are arranged in one shell with a sharing cavity, and the sharing cavity is communicated with the inner cavities of all the single batteries in the shell, so that the electrolyte and/or the gas of all the single batteries are shared to ensure the consistency of all the single batteries, namely, the electrolyte and/or the gas of all the single batteries are communicated, the electrolytes and/or the gas of all the single batteries are in the same system, the difference among the single batteries is reduced, the consistency among the single batteries is improved to a certain extent, and the cycle life of the large-capacity battery is improved to a certain extent.

According to the utility model, the shared cavity is not required to be spliced, the problem of coaxial splicing is not required to be considered in the arrangement direction of the single batteries, and the requirements on the processing precision and the assembly precision are low; meanwhile, a special tool is not needed, the assembly process is simpler, the processing difficulty and the processing cost of the high-capacity battery with the shared system are greatly reduced, and batch production can be realized.

In addition, the utility model adopts a primary heat exchange mode, the heat of the pole column with the most concentrated heat on each single battery is conducted to the outside for heat dissipation in a mode of connecting the liquid cooling pipe with the pole column of each single battery, and the heat dissipation mode realizes the balanced heat dissipation of each single battery in the large-capacity battery and improves the use safety of the large-capacity battery. Meanwhile, in order to overcome the problem that condensation is generated on the surface due to the temperature difference between the inside and the outside of the water cooling pipe in the long-time use process, when the condensation is gathered to a certain amount, the condensation possibly permeates into a gap between the pole and the avoiding hole, so that short circuit is caused; according to the utility model, the insulating sealant layer is paved on the top plate of the shell (the insulating sealant layer is also arranged in the gap between the pole and the avoidance hole), so that the condensation is generated on the surface of the liquid cooling pipe fixed on the pole, and cannot permeate into the gap between the pole and the avoidance hole under the blocking of the insulating sealant layer, so that the short circuit of the battery can be prevented.

The utility model can thicken the thickness of the insulating sealing glue layer, and completely cover the liquid cooling pipe main body in the insulating sealing glue layer so as to further improve the anti-condensation effect, and in addition, the top of the whole large-capacity battery can be smoother.

Further, the liquid cooling tube clamping part is a through hole or a through groove formed in the single battery pole.

Further, the high-capacity battery further comprises an insulation protection cover, wherein the insulation protection cover is arranged at the top of the shell of the high-capacity battery, and each single battery pole is positioned in the insulation protection cover;

Defining the length direction of the shell as the x direction, the width direction as the y direction and the height direction as the z direction;

the side wall of the insulating protective cover is provided with a channel for extending the liquid cooling pipe;

Slits are formed in two side walls of the insulating protective cover, which are parallel to the xz plane, and the electric connection parts of the single battery poles are connected with the electric connection parts through the slits.

According to the utility model, the insulation protection cover is utilized to provide insulation protection for the pole, so that potential safety hazards possibly existing in the process of exposing the pole in the operation of the high-capacity battery are avoided, the problem that the high-capacity battery is short-circuited due to the fact that some foreign matters in the external environment fall into the position of the pole is also avoided, and the safety of the high-capacity battery is improved.

Further, the insulation protection cover comprises an insulation frame body and an insulation cover plate;

the lower end of the insulating frame body is fixed at the top of the high-capacity battery;

the upper end of the insulating frame body is buckled and provided with an insulating cover plate;

And a notch is formed at the upper end of the side wall of the insulating frame body, which is parallel to the xz plane, and the notch is matched with the insulating cover plate to form a slit.

According to the utility model, the insulation protective cover is designed into a split structure, the insulation frame body is used as the glue injection mould, demoulding is not needed after glue injection is completed, the glue injection process is simplified, and the risk of damage to the glue layer structure in the demoulding process can be avoided. In addition, the bonding strength between the insulating frame body and the top of the high-capacity battery can be improved by utilizing the insulating sealant layer.

Further, the sharing chamber is an electrolyte sharing chamber and is a liquid channel positioned on the bottom plate of the shell, and the liquid channel is communicated with the electrolyte areas in the inner cavities of the single batteries. The electrolyte sharing chamber is communicated with electrolyte areas of the inner cavities of all the single batteries in the shell, so that the consistency of all the single batteries is ensured by sharing the electrolyte of all the single batteries, and the cycle life of the high-capacity battery is prolonged to a certain extent. In addition, the electrolyte sharing chamber is formed in one step in the process of processing the bottom plate of the shell, so that the processing is convenient, and the structure is simple.

Further, the sharing chamber is a gas sharing chamber, and is a gas channel positioned on the top plate of the shell, and the gas channel is communicated with the gas area of each single battery inner cavity. The gas sharing chamber is communicated with the gas areas of the inner cavities of the single batteries in the shell, so that the gas of the single batteries is balanced, the consistency among the single batteries is improved to a certain extent, and the cycle life of the high-capacity battery is prolonged to a certain extent. In addition, the gas sharing chamber is formed in one step in the process of processing the top plate of the shell, so that the processing is convenient, and the structure is simple.

Further, when the size phase difference of each single battery in the z direction of group is great, can be provided with the arch at the surface that the shell roof is close to single battery, and set up the step through-hole that link up the shell roof on the arch, as dodging the hole, the aperture of step through-hole is close to single battery, and the aperture depth of aperture is less than the aperture depth of macropore for the step face is more easily pressed close to single battery casing, seals through fusion welding step face and single battery casing.

The beneficial effects of the utility model are as follows:

In order to overcome the problem that condensation is generated on the surface due to the temperature difference between the inside and the outside of the water cooling pipe in the long-time use process, when the condensation is gathered to a certain amount, the condensation possibly permeates into a gap between the pole and the avoiding hole, so that the problem of short circuit is solved; through to the shell top board lay insulating seal glue film (the clearance between the utmost point post and dodge the hole also has insulating seal glue film), liquid cooling pipe surface produces the condensation on fixing on the utmost point post, under insulating seal glue film's the stop, the unable infiltration utmost point post of condensation with dodge the clearance between the hole, and then can prevent the condition emergence of battery short circuit.

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 showing a partial structure of a large-capacity battery in embodiment 1;

fig. 3 is a partial exploded view of the large-capacity battery of example 1;

Fig. 4 is a schematic structural view of the top plate of the housing in embodiment 1;

FIG. 5 is a cross-sectional view of the top plate of the housing in example 1;

fig. 6 is a schematic structural view of the large-capacity battery in embodiment 1;

Fig. 7 is a partial exploded view of the large-capacity battery of example 1;

fig. 8 is a schematic structural view of a large-capacity battery in embodiment 2;

fig. 9 is a partial exploded view of the large-capacity battery in example 2;

the reference numerals in the drawings are:

01. a sub-pipeline; 02. an intermediate connecting pipe; 03. a single battery lower cover plate;

1. A housing; 11. a housing top plate; 12. a housing floor; 2. a single battery; 21. a single battery post; 211. a first end face; 212. a side surface; 3. an electrolyte sharing chamber; 4. a gas sharing chamber; 5. avoidance holes; 51. a step surface; 6. a liquid-cooled tube; 61. a liquid inlet end; 62. a liquid outlet end; 7. an insulating sealant layer; 8. a through hole; 9. an electrical connection; 10. an insulating protective cover; 101. an insulating frame; 102. an insulating cover plate.

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.

The utility model relates to a high-capacity battery, as shown in fig. 2 and 3, comprising a shell 1 and a plurality of single batteries 2; a plurality of single batteries 2 are arranged in the same direction and placed in the shell 1;

The shell 1 is provided with a shared cavity, and the inner cavity of the shared cavity is communicated with the inner cavities of all the single batteries 2;

It should be noted that:

The sharing chamber may be an electrolyte sharing chamber 3 (as shown in fig. 2), and each single battery 2 is in a unified electrolyte environment through the electrolyte sharing chamber 3, so that the uniformity of the electrolyte in each single battery 2 is ensured; the performance and the charge-discharge cycle life of the high-capacity battery are improved.

The sharing chamber may be a gas sharing chamber 4 (as shown in fig. 2), and the gas sharing chamber 4 realizes the gas balance of each unit cell 2, so that the performance and the charge-discharge cycle life of the large-capacity battery can be improved.

The sharing chamber can be a gas-liquid sharing chamber, and each single battery 2 can be in a uniform electrolyte environment and a uniform gas environment through one gas-liquid sharing chamber, so that the performance of the high-capacity battery and the charge-discharge cycle life are improved.

In order to improve the heat dissipation performance of the high-capacity battery, avoidance holes 5 are formed in the top plate 11 of the shell, corresponding to the polar columns of the single batteries 2; each single battery pole 21 extends out of the corresponding avoidance hole 5, and the area of the shell top plate 11 corresponding to the avoidance hole 5 is fixedly sealed with the shell of the single battery 2, so that a gap between the pole and the avoidance hole 5 is sealed.

The part of each single battery pole column 21 extending out of the avoiding hole 5 is provided with a clamping part of the liquid cooling pipe 6; fixing the main body of the liquid cooling pipe 6 on a clamping part of the liquid cooling pipe 6; and heat dissipation is realized by a primary heat exchange mode.

However, in the long-time use process, due to the temperature difference between the inside and outside of the liquid cooling pipe 6, condensation is generated on the surface, and when the condensation is accumulated to a certain amount, the condensation can permeate into a gap between the pole and the avoiding hole 5, so that the pole is electrically communicated with the shell 1, and further the short circuit of the same single battery 2 can be possibly caused.

According to the utility model, the top structure of the high-capacity battery is optimized, the insulating sealant layer 7 is paved on the top plate 11 of the shell to overcome the problems, and the electric connection parts of the single battery poles 21 extend out of the insulating sealant layer 7 and are used for being connected with the electric connection piece 9; the liquid inlet end 61 and the liquid outlet end 62 of the liquid cooling pipe 6 extend out of the insulating sealing glue layer 7 and are used for being connected with liquid cooling equipment. Wherein the electrical connection 9 is a connection device for realizing the series connection of two large-capacity batteries; the connection device may be a device for connecting the large-capacity battery to an external load.

The utility model is further described below with reference to the accompanying drawings and specific embodiments.

Example 1

Referring to fig. 2 and 3, the large-capacity battery of the present embodiment includes a case 1 and 10 parallel unit cells 2 arranged in the case 1.

In this embodiment, the number of the single batteries 2 is 10, and in other embodiments, the number can be adjusted according to the actual requirement. Each of the cells 2 has an inner chamber including an electrolyte region and a gas region.

For convenience of description, the length direction of the housing 1 is defined as the x direction, the width direction of the housing 1 is defined as the y direction, and the height direction of the housing 1 is defined as the z direction.

An electrolyte sharing chamber 3 is arranged on the bottom plate 12 of the shell along the x direction, and the inner cavity of the electrolyte sharing chamber 3 is communicated with the electrolyte areas in the inner cavities of the single batteries 2.

In the top plate 11 of the housing, a gas sharing chamber 4 is provided along the x direction, and the inner cavity of the gas sharing chamber 4 is communicated with the gas area of the inner cavity of each single battery 2.

In other embodiments, only the electrolyte sharing chamber 3 or the gas sharing chamber 4 may be provided, or a gas-liquid sharing chamber may be provided on the side wall of the housing 1 along the x direction, and the inner cavity of the gas-liquid sharing chamber is communicated with the electrolyte area and the gas area of the inner cavity of each single battery 2.

As shown in fig. 4, the case top plate 11 is provided with a relief hole 5 through which each battery cell post 21 can extend; each single battery pole column 21 extends out of the corresponding avoidance hole 5, and the area of the shell 1 around the avoidance hole 5 is fixedly sealed with the shell of the single battery 2.

When the dimensions of each unit cell 2 in the group in the z direction are relatively consistent, the housing top plate 11 region corresponding to the avoidance hole 5 can be directly welded with the upper cover plate region around the unit cell pole 21 to realize sealing.

In the case where the size of each unit cell 2 in the group in the z direction is greatly different, the structure of the escape hole 5 may be a stepped hole structure as shown in fig. 5, and the sealing is performed by fusion welding the stepped surface 51 with the housing of the unit cell 2. For sealing, the surface of the shell top plate, which is close to the single battery, is provided with a bulge, and the bulge is provided with a step through hole penetrating through the shell top plate, so that the step through hole is used as an avoidance hole 5, a small hole of the step through hole is close to the single battery, and the hole depth of the small hole is smaller than that of the large hole, so that the step surface 51 is easier to be close to the shell of the single battery 2.

Referring to fig. 3, it can be seen that in this embodiment, a through hole 8 is formed at a portion of the battery cell post 21 extending out of the avoidance hole 5, and the through hole is used as a clamping portion of the liquid cooling tube 6; as can be seen from fig. 3, the post of the present embodiment is a cylinder, and includes a first end surface 211, a second end surface and a side surface 212 (the first end surface 211 and the second end surface are parallel to each other), and the through hole 8 is formed on the side surface 212 of the post, that is, the opening of the through hole 8 is located on the side surface 212.

In other embodiments, a through slot may be formed on the side 212, i.e., the opening of the through slot is located on the side 212;

In other embodiments, a through slot may be formed on the first end surface 211, that is, the opening of the through slot is located on the first end surface 211;

The first end surface 211 is for connection with the external electrical connector 9, and the second end surface is for electrical connection with the electrode assembly in the case of the unit cell 2.

The side surface 212 is provided with a through groove and a through hole 8, and compared with the first end surface 211 provided with the through groove, the liquid cooling pipe 6 has larger contact area with the inner wall of the through groove or the through hole 8 in the through groove or the through hole 8, and has higher heat exchange efficiency. In addition, when the through groove and the through hole 8 are located on the side surface 212, the entire area of the first end surface 211 may be used as an electrical connection area. Two through grooves or through holes 8 can be formed on the side surface 212 of the pole at the same time, so that the number of the liquid cooling tubes 6 is increased, and the heat exchange efficiency is further improved. The through slot is configured relative to the through hole 8, so that the liquid cooling pipe 6 is easier to install.

The section of leading to the groove is the C font, and the section is the logical groove of C font, and its opening width is less than the widest department of leading to the groove, and such design is favorable to liquid cold pipe 6 interference joint in logical inslot, and the radian that C font led to its both ends to form has natural tension, is favorable to with the inseparable joint of liquid cold pipe 6 in logical inslot.

The liquid cooling pipe 6 is fixed in the through groove or the through hole 8, and when the temperature of the high-capacity battery is higher than a set threshold value, a heat transfer medium with lower temperature is introduced into the liquid cooling pipe 6 to cool the high-capacity battery; when the temperature of the high-capacity battery is lower than a set threshold value, a heat transfer medium with higher temperature is introduced into the liquid cooling pipe 6 to heat the high-capacity battery; by controlling the temperature of the heat transfer medium, it is ensured that the high-capacity battery always operates at a normal operating temperature.

As shown in fig. 2, the liquid cooling tube 6 of this embodiment may be a U-shaped tube section, and two parallel tube sections of the U-shaped tube section are respectively clamped in the clamping portions of the liquid cooling tube 6 of the positive electrode column and the negative electrode column of each unit cell 2 in the large-capacity battery.

In other embodiments, two liquid cooling pipes 6 may be further used, where the two liquid cooling pipes 6 are respectively clamped in the clamping portions of the liquid cooling pipes 6 of the positive pole and the negative pole of each unit cell 2 in the high-capacity battery.

In order to prevent the condensation generated by the liquid cooling pipe 6 from causing a safety problem, as shown in fig. 6, in this embodiment, an insulating sealant 7 is laid on the top plate 11 of the housing, and as can be seen from the figure, a part of the area of each single battery post 21 is covered by the insulating sealant 7, and the electrical connection part (i.e., the first end face 211) of each single battery post 21 extends out of the insulating sealant 7 and is connected with the electrical connector 9; the main body part of the liquid cooling pipe 6 is covered by an insulating sealing glue layer 7, and a liquid inlet end 61 and a liquid outlet end 62 of the liquid cooling pipe 6 extend out of the insulating sealing glue layer 7 and are used for being connected with liquid cooling equipment.

In other embodiments, the size of the insulating sealant layer 7 in the z direction may be smaller, lower than the main body portion of the liquid cooling tube 6, or cover a partial area of the main body portion of the liquid cooling tube 6; only the condensation can not enter the gap between the pole and the avoiding hole 5.

The insulating sealant used in the embodiment is generally a battery pouring sealant commonly used for batteries, for example, an organosilicon heat conduction pouring sealant can be used, and the insulating sealant has good sealing, insulating, vibration-resisting, heat dissipation, water resistance and other functions.

In order to prevent the insulation sealing glue solution from overflowing, in the glue injection process of the embodiment, a glue injection mold can be additionally arranged at the peripheral edge of the top plate 11 of the shell, so that the insulation sealing glue solution can be injected smoothly. And after the glue injection is finished, demoulding.

Example 2

In the above embodiment, the pole is directly exposed to the external environment, and there is a great potential safety hazard due to the electrification of the pole during use. Based on this, as shown in fig. 8, the insulating protection cover 10 is arranged on the top of the high-capacity battery according to the embodiment, so as to provide insulating protection for the pole, avoid potential safety hazards possibly existing in the process of exposing the pole in the operation of the high-capacity battery, and also avoid the problem that some foreign matters in the external environment fall into the position of the pole to cause short circuit of the high-capacity battery, thereby improving the safety of the high-capacity battery.

It should be noted that, if the insulation protection cover 10 wraps the pole, it is difficult to electrically connect such a large-capacity battery, so in this embodiment, a slit is formed on a side wall parallel to the xz plane of the insulation protection cover 10, and the electrical connector 9 can be connected with the pole through the slit, so as to further realize electrical connection.

It should be noted that, the side wall of the insulation protection cover 10 needs to be provided with a channel for extending the liquid inlet end 61 and the liquid outlet end 62 of the liquid cooling pipe 6.

In order to facilitate the electrical connection process, the insulation protection cover 10 is designed to be a split structure in this embodiment, as shown in fig. 9, and includes an insulation frame 101 and an insulation cover plate 102 covering the insulation frame 101; the lower end of the insulating frame 101 is used for matching with the top of the high-capacity battery, and is fixed on the top of the high-capacity battery in a mode of screw connection or bonding, etc., the insulating cover plate 102 is buckled and installed at the upper end of the insulating frame 101, a notch is formed at the upper end of the side wall of the insulating frame 101 parallel to the xz plane, and the notch is matched with the insulating cover plate 102 to form the slit.

In assembly, the insulating frame 101 may be fixed on top of the large-capacity battery, then the electric connector 9 is connected with the pole through the slit, and after glue injection, the insulating cover 102 is fixed on the upper end of the insulating frame 101.

In addition, in the embodiment 1, in order to prevent the insulation sealing glue from overflowing during the glue injection process, a glue injection mold is needed, but after the glue injection is completed, the demolding is needed, and the process is complicated; in addition, during the demolding, the structure of the insulating sealant layer 7 may be damaged, resulting in a decrease in sealing reliability.

In this embodiment, the insulating frame 101 of the insulating protective cover 10 can be used as an injection mold, and demolding is not required after the injection is completed, and meanwhile, the bonding strength between the insulating frame 101 and the top of the high-capacity battery can be improved.

Claims

1. A large-capacity battery, characterized in that it comprises a housing (1), a plurality of single cells (2) and a liquid cooling tube (6); the plurality of single cells (2) are arranged in the housing (1) in the same direction;

The housing (1) is provided with a shared chamber, and the inner cavity of the shared chamber is connected to the inner cavities of all the single batteries (2);

A avoidance hole (5) is provided on the outer shell top plate (11) corresponding to the pole of each single battery (2); the pole of each single battery (2) extends out of the avoidance hole (5), and the area of the outer shell top plate (11) corresponding to the avoidance hole (5) is fixedly sealed with the shell of the single battery (2);

A liquid cooling pipe (6) clamping portion is provided at the location where the pole of each single battery (2) protrudes out of the avoidance hole (5);

The liquid cooling tube (6) comprises a liquid cooling tube (6) body and a liquid inlet end (61) and a liquid outlet end (62) of the liquid cooling tube (6); the liquid cooling tube (6) body is fixed to a clamping portion of the liquid cooling tube (6);

An insulating sealant layer (7) is laid on the top plate (11) of the housing; the electrical connection parts of the poles of each single battery (2) extend out of the insulating sealant layer (7); and the liquid inlet end (61) and the liquid outlet end (62) of the liquid cooling pipe (6) extend out of the insulating sealant layer (7).

2. The large-capacity battery according to claim 1 is characterized in that the main body of the liquid cooling tube (6) is located inside the insulating sealant layer (7).

3. The large-capacity battery according to claim 2, characterized in that the clamping portion of the liquid cooling tube (6) is a through hole (8) or a through groove opened on the pole of the single battery (2).

4. The large-capacity battery according to any one of claims 1 to 3, characterized in that: it also includes an insulating protective cover (10), the insulating protective cover (10) is arranged on the top of the shell (1) of the large-capacity battery, and the poles of each single battery (2) are located in the insulating protective cover (10);

The length direction of the housing (1) is defined as the x direction, the width direction is defined as the y direction, and the height direction is defined as the z direction;

A channel for the liquid cooling pipe (6) to extend out is provided on the side wall of the insulating protective cover (10);

Slits are provided on two side walls of the insulating protective cover (10) parallel to the xz plane, and the electrical connection parts of the poles of each single battery (2) are connected to the electrical connector (9) through the slits.

5. The large-capacity battery according to claim 4, characterized in that: the insulating protective cover (10) comprises an insulating frame (101) and an insulating cover plate (102);

The lower end of the insulating frame (101) is fixed to the top of the large-capacity battery;

The upper end of the insulating frame (101) is buckled and mounted with an insulating cover plate (102);

A notch is provided at the upper end of a side wall of the insulating frame (101) parallel to the xz plane, and the notch cooperates with the insulating cover plate (102) to form a slit.

6. The large-capacity battery according to claim 1 is characterized in that the shared chamber is an electrolyte shared chamber (3), which is a liquid channel located on the bottom plate (12) of the shell, and the liquid channel is connected to the electrolyte area in the inner cavity of each single battery (2).

7. The large-capacity battery according to claim 1 or 6 is characterized in that the shared chamber is a gas shared chamber (4), which is a gas channel located on the top plate (11) of the outer shell, and the gas channel is connected to the inner gas area of each single battery (2).

8. The large-capacity battery according to claim 1, characterized in that:

A protrusion is provided on the surface of the housing top plate (11) close to the single cell, and a stepped through hole penetrating the housing top plate (11) is provided on the protrusion as an avoidance hole (5). The small hole of the stepped through hole is close to the single cell, and the hole depth of the small hole is less than the hole depth of the large hole.