CN220984740U - Module battery, module battery pack and battery pack - Google Patents

Abstract

The utility model discloses a module battery, a module battery pack and a battery pack, wherein the module battery comprises: a shell, a tubular structure, two ends of which are open ends; the battery cell assembly and the heat-conducting glue are arranged in the shell, the heat-conducting glue is at least filled between the top of the battery cell assembly and the inner side of the top wall of the shell, and between the bottom of the battery cell assembly and the inner side of the bottom wall of the shell, and the two ends of the battery cell assembly are provided with lugs; the two tab support plates are arranged at the opening end of the shell, each tab support plate is provided with a tab groove, and each tab penetrates through each tab groove and is exposed out of the shell. In the module battery, the shell is a main body frame and plays a role in supporting and protecting the battery cell assembly, and can bear partial load, so that the overall structural strength of the battery pack is improved at the level of the module; meanwhile, the lug ends of the battery cell assembly are exposed and are not shielded, end plates at two ends are canceled, the battery cell assembly is installed in a battery pack in an adhesive fixing mode, and the integration efficiency is improved.

Description

A module battery, a module battery pack and a battery pack

Technical Field

The utility model relates to the technical field of batteries, and in particular to a module battery, a module battery group and a battery pack.

Background technique

The battery integration technology of electric vehicles has undergone rapid iterative development. The early integration method used end-side panel welding to wrap the battery cell inside to form a module, which was fixed by end-side panels and trays. It involved the use of a large number of metal and non-metal parts, had low integration efficiency and space utilization, and each module was equipped with a separate control unit. The integration method was complex and the cost was high.

The latest industry research direction is CTP technology, i.e. module-free technology, which is expected to maximize the use of the space inside the battery pack and improve volume and weight utilization. However, the current CTP technology, as the main body that bears all the loads, has very high requirements for structural design and also places higher requirements on the battery pack production line.

Therefore, it is necessary to develop an integration technology that can not only improve the structural strength of the entire package at the module level, but also maintain a high integration efficiency from battery cells to modules to battery packs.

Utility Model Content

The purpose of the utility model is to provide a module battery, a module battery group and a battery pack, which can not only improve the overall structural strength of the battery pack at the module level, but also maintain a high integration efficiency from the battery cell to the module to the battery pack.

In order to solve the above technical problems, the utility model provides a module battery, comprising:

A shell, wherein the shell is a cylindrical structure, and both ends of the shell are open ends;

A battery cell assembly and a thermally conductive adhesive, wherein the battery cell assembly is installed inside the shell, the thermally conductive adhesive is at least filled between the top of the battery cell assembly and the inner side of the top wall of the shell, and between the bottom of the battery cell assembly and the inner side of the bottom wall of the shell, and the battery cell assembly has pole ears at both ends;

Two tab support plates are mounted on the open ends of the shell, and the tab support plates have tab slots. The tabs pass through the tab slots at the corresponding ends and are exposed on the shell.

In the module battery of the utility model, the shell is the main frame of the module battery, and the shell wraps the battery cell assembly inside, which can support and protect the battery cell assembly, that is, the shell can bear part of the load, thereby improving the overall structural strength of the battery pack at the module level; at the same time, thermal conductive adhesive is filled between the top of the battery cell assembly and the inner side of the top wall of the shell, as well as between the bottom of the battery cell assembly and the inner side of the bottom wall of the shell. On the one hand, the thermal conductive adhesive can play the role of bonding and fixing the battery cell assembly, with good fixing effect and simple structure; on the other hand, the thermal conductive adhesive can also play the role of heat transfer, transferring the heat generated by the battery cell assembly to the top and bottom walls of the shell, thereby improving the heat dissipation effect; finally, ear support plates are added at both ends of the shell, which can play the role of welding support for the ears of the battery cell assembly. The battery cell assembly has a supporting effect, and the tabs of the battery cell assembly are exposed at both ends of the shell. A cooling plate can be directly set at the tab ends of the battery cell assembly, and the battery cell assembly is cooled and dissipated by the cooling plate. In this way, the six sides of the module battery can be used for cooling and dissipating heat, which greatly improves the cooling and dissipation efficiency of the module battery. In addition, the module battery group formed by the module battery can be fixed in the battery pack by gluing, that is, the end plates at both ends of the shell are eliminated, which can reduce the use of a large number of metal parts and non-metal parts, greatly reduce the weight of the module battery, and the weight utilization rate and volume utilization rate of the battery cell can be greatly improved. In addition, the elimination of the end plate can also save the end plate welding process, the process has fewer assembly processes, less equipment and labor investment, saves assembly time, improves the assembly efficiency of the module battery, and reduces costs.

It can be seen that the modular battery of the utility model can not only improve the overall structural strength of the battery pack at the module level, but also maintain a high integration efficiency from the battery cell to the module to the battery pack.

Optionally, inside the shell, elastic members and hard insulating plates are provided on both left and right sides of the battery cell assembly, and the elastic members are located between the battery cell assembly and the hard insulating plates on the corresponding sides.

Optionally, the elastic member is made of PU foam;

And/or, the rigid insulating board is a mica board or an epoxy board.

Optionally, the housing comprises a metal shell, and an insulating layer is provided on the inner side of the top wall and the inner side of the bottom wall of the metal shell.

Optionally, the battery cell assembly includes a plurality of battery cell bodies, the plurality of battery cell bodies are stacked, the tabs include internal tabs, and the internal tabs are used to connect the battery cell bodies in series or in parallel.

It also includes a single-cell monitoring unit and a flexible circuit board. The flexible circuit board is electrically connected to each of the internally connected tabs, and the single-cell monitoring unit is electrically connected to the flexible circuit board.

Optionally, one of the shell and the tab support plate is provided with a buckle, and the other is provided with a buckle groove. In an installed state, the buckle and the buckle groove are fixed in one-to-one correspondence.

Optionally, the pole tab support plate comprises a support plate body, the inner side wall of the support plate body is further provided with reinforcing ribs, the reinforcing ribs at least comprise a first rib portion extending along the extension direction of the pole tab slot, and the pole tab slot is located between two adjacent first rib portions.

The utility model also provides a module battery pack, comprising a plurality of the aforementioned module batteries, wherein the plurality of module batteries are stacked, two adjacent module batteries are bonded to each other and fixed, and the positive pole ear of one of the two adjacent module batteries is electrically connected to the negative pole ear of the other.

The modular battery pack of the utility model includes the aforementioned modular battery, and thus has the same technical effects as the aforementioned modular battery, which will not be described in detail herein.

Optionally, two insulating films are further included, the insulating films extending along the stacking direction of the module batteries, the two insulating films being arranged at both ends of the module batteries, and the insulating films covering corresponding ends of each of the module batteries;

Or, it further includes two cooling plates, which extend along the stacking direction of the module batteries, and the two cooling plates are arranged at both ends of the module batteries, and the cooling plates cover the corresponding ends of each of the module batteries.

The utility model also provides a battery pack, comprising a tray and the aforementioned module battery pack, wherein the module battery pack is adhesively fixed to the tray.

The battery pack of the utility model includes the aforementioned module battery pack, and therefore has the same technical effects as the aforementioned module battery pack, which will not be described in detail herein.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a specific embodiment of a module battery provided by the present utility model;

FIG2 is a split diagram of the module battery of FIG1 ;

FIG3 is a schematic structural diagram of a cell assembly in the module battery of FIG1 ;

FIG4 is a schematic diagram of the structure of a housing in the battery module of FIG1 ;

FIG5 is a schematic diagram of the structure of a tab support plate in the battery module of FIG1 ;

FIG6 is a schematic structural diagram of the tab support plate of FIG5 from another angle;

FIG7 is a schematic structural diagram of a specific embodiment of a module battery pack provided by the present utility model;

The reference numerals in FIGS. 1 to 7 are described as follows:

01-module battery; 1-shell; 11-metal shell; 12-insulating layer; 2-cell assembly; 21-cell body; 22-internal pole ear; 23-positive pole ear; 24-negative pole ear; 3-thermal conductive glue; 4-pole ear support plate; 4a-pole ear groove; 41-support plate body; 42-reinforcement rib; 5-elastic part; 6-hard insulating plate; a-clip; b-clip groove;

02-Cooling plate.

Detailed ways

In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

The “plurality” mentioned herein generally means more than two; and when “plurality” is used to indicate the number of certain components, it does not indicate the relationship between the quantities of these components.

Please refer to FIG. 1-FIG. 2 , FIG. 1 is a schematic structural diagram of a specific embodiment of a module battery provided by the present utility model; FIG. 2 is a split diagram of the module battery of FIG. 1 .

The utility model provides a module battery 01, comprising:

Shell 1, the shell 1 is a cylindrical structure, and both ends of the shell 1 are open ends;

The battery cell assembly 2 and the thermal conductive adhesive 3 are installed inside the shell 1. The thermal conductive adhesive 3 is filled between the top of the battery cell assembly 2 and the inner side of the top wall of the shell 1, and between the bottom of the battery cell assembly 2 and the inner side of the bottom wall of the shell 1. Both ends of the battery cell assembly 2 have pole ears.

Two tab support plates 4 are mounted on the open ends of the housing 1 , and the tab support plates 4 have tab slots 4 a . The tabs pass through the tab slots 4 a of the tab support plates 4 at the corresponding ends and are exposed to the housing 1 .

In the module battery of the utility model, the shell 1 is the main frame of the module battery 01, and the shell 1 wraps the battery cell assembly 2 inside, which can support and protect the battery cell assembly 2, that is, the shell 1 can bear part of the load, thereby improving the overall structural strength of the battery pack at the module level; at the same time, thermal conductive adhesive 3 is filled between the top of the battery cell assembly 2 and the inner side of the top wall of the shell 1, as well as between the bottom of the battery cell assembly 2 and the inner side of the bottom wall of the shell 1. On the one hand, the thermal conductive adhesive 3 can play the role of bonding and fixing the battery cell assembly 2, with good fixing effect and simple structure; on the other hand, the thermal conductive adhesive 3 can also play the role of heat transfer, transferring the heat generated by the battery cell assembly 2 to the top wall and bottom wall of the shell 1, thereby improving the heat dissipation effect; finally, the ear support plates 4 are added at both ends of the shell 1, which can play the role of welding the ears of the battery cell assembly 2. In order to realize the supporting function, the tabs of the battery cell assembly 2 are exposed at both ends of the shell 1, and a cooling plate can be directly arranged at the tab ends of the battery cell assembly 2 to cool and dissipate the heat of the battery cell assembly 2 through the cooling plate. In this way, the six surfaces of the module battery 01 can be used for cooling and dissipating heat, which greatly improves the cooling and dissipation efficiency of the module battery 01. In addition, the module battery group formed by the module battery 01 can be fixed in the battery pack by gluing, that is, the end plates at both ends of the shell 1 are eliminated, which can reduce the use of a large number of metal parts and non-metal parts, greatly reduce the weight of the module battery 01, and the weight utilization rate and volume utilization rate of the battery cell can be greatly improved. In addition, the elimination of the end plate can also save the end plate welding process, the process has fewer assembly processes, less equipment and labor investment, saves assembly time, improves the assembly efficiency of the module battery 01, and reduces costs.

It can be seen that the modular battery 01 of the utility model can not only improve the overall structural strength of the battery pack at the module level, but also maintain a high integration efficiency from the battery cell to the module to the battery pack.

As mentioned above, in this embodiment, the thermal conductive adhesive 3 is filled between the top of the battery cell assembly 2 and the inner side of the top wall of the shell 1, and between the bottom of the battery cell assembly 2 and the inner side of the bottom wall of the shell 1. In practical applications, it is also feasible to fill the inner cavity area of the entire module battery 01 with the thermal conductive adhesive 3, that is, the thermal conductive adhesive 3 should at least be filled between the top of the battery cell assembly 2 and the inner side of the top wall of the shell 1, and between the bottom of the battery cell assembly 2 and the inner side of the bottom wall of the shell 1.

The thermal conductive adhesive 3 may be PU adhesive, epoxy adhesive or the like.

Please refer to FIG. 2 and FIG. 3 , FIG. 3 is a schematic diagram of the structure of the battery cell assembly in the module battery of FIG. 1 .

In this embodiment, the battery cell assembly 2 includes a plurality of battery cell bodies 21, and the plurality of battery cell bodies 21 are stacked and arranged, and pole ears are arranged at both ends of the battery cell body 21, one end of which is a positive electrode and the other end is a negative electrode; correspondingly, the number of pole ear grooves 4a arranged on the pole ear support plate 4 is the same as the number of battery cell bodies 21 in the battery cell assembly 2. During the manufacturing process of the module battery 01, the pole ears at the corresponding ends of the battery cell assembly 2 pass through the corresponding pole ear grooves 4a, and then the pole ears are bent and welded according to a predetermined connection method to realize the series or parallel connection of the plurality of battery cell bodies 21 to obtain the required amount of electricity. The pole ears used for series or parallel connection of each battery cell body 21 are collectively referred to as internal pole ears 22.

As shown in Figures 1 to 3, the battery cell assembly 2 has two independent pole tabs, one of which serves as the positive pole tab 23 of the battery cell assembly 2, and the other serves as the negative pole tab 24 of the battery cell assembly 2, which are used to connect with adjacent module battery packs after grouping. The positive pole tab 23 and the negative pole tab 24 are collectively referred to as external pole tabs.

As can be seen from FIG. 1 , the tab is in contact with the outer wall of the tab support plate 4 after being bent. The tab support plate 4 can play a supporting role during the tab welding to ensure the welding reliability.

Among them, the battery cell body 21 is the main energy storage unit. The battery cell body 21 includes a battery cell packaging structure, a core, an electrolyte, etc. The core contains a positive electrode coating, a positive electrode collector, a separator, a negative electrode coating and a negative electrode collector, etc. The main purpose of the battery cell packaging structure is to seal and insulate, and PP (Polypropylene), PE (Polyethylene) or aluminum-plastic film can be selected.

It can be understood that the specific structure of the battery cell body 21 is an existing technology well known to those skilled in the art and will not be described in detail here.

Furthermore, it can be seen from FIG. 3 that in the present embodiment, a plurality of battery cell bodies 21 are stacked and arranged, and the plurality of battery cell bodies 21 can share the same CMU (Cell monitor Unit) and FPC (Flexible Printed Circuit), thereby saving space and reducing weight and cost.

Based on this, the module battery 01 of the present application further includes a cell monitoring unit and a flexible circuit board, the flexible circuit board is electrically connected to each internally connected tab 22, and the cell monitoring unit is electrically connected to the flexible circuit board. In this way, the working conditions of each cell 21 can be monitored simultaneously by a cell monitoring unit.

Please continue to refer to FIG. 2 . In this embodiment, an elastic member 5 and a hard insulating plate 6 are provided on both the left and right sides of the battery cell assembly 2 inside the shell 1 . The elastic member 5 is located between the battery cell assembly 2 and the hard insulating plate 6 on the corresponding side.

In this way, the battery cell assembly 2 located in the middle, and the elastic members 5 and the hard insulating plates 6 on both sides form a battery cell unit as a whole, wherein the elastic member 5 can absorb the expansion of the battery cell assembly 2 during use; the hard insulating plate 6 is located at the outermost side of the battery cell unit. In the manufacturing process of the module battery, the battery cell assembly 2, the elastic member 5 and the hard insulating plate 6 can be stacked to form a battery cell unit, and then the hard insulating plates 6 on both sides are clamped by tooling to send the battery cell unit into the shell 1. It can be seen that the hard insulating plate 6 can facilitate the process assembly. At the same time, the hard insulating plate 6 is made of insulating material and can also play an insulating role to prevent leakage.

In practical applications, the rigid insulating board 6 can be a mica board or an epoxy board. The mica board is made by bonding, heating and pressing mica paper and organic silica gel water, and has excellent high temperature insulation performance and excellent electrical insulation performance; the epoxy board is also called epoxy glass fiber board, which has high mechanical and dielectric properties, good heat resistance and moisture resistance, and good machinability.

In practical applications, the material of the elastic member 5 is preferably PU foam. PU (ploy urethane) is polyurethane, and PU foam is also called PU sponge, PU foam material, polyurethane sponge, etc. It has the advantages of light weight, elasticity, rapid pressure-sensitive fixation, easy use, flexible bending, ultra-thin volume, reliable performance, etc. There is no limit on the number of elastic members 5 set on one side of the battery cell assembly 2, for example, it can be one or more.

Please refer to FIG. 4 , which is a schematic diagram of the structure of the shell of the module battery in FIG. 1 .

In this embodiment, the housing 1 includes a metal shell 11 , and an insulating layer 12 is provided on the inner side of the top wall and the inner side of the bottom wall of the metal shell 11 .

In this way, the metal shell 11 is the main frame of the module battery 01. The metal shell 11 wraps the battery cell unit inside, which can support and protect the battery cell unit 2. The metal shell 11 can also serve as the heat dissipation surface of the module battery 01; and the insulating layer 12 mainly plays an insulating role. The insulating layers 12 on the upper and lower sides and the hard insulating plates 6 on the left and right sides work together to isolate the battery cell assembly 2 and the metal shell 11 to ensure the insulation effect.

In practical applications, the surface of the metal shell 11 should be smooth and flat, which is more conducive to the grouping of the module batteries 01.

The metal shell 11 is usually made of aluminum, which is light, has good structural strength, high thermal conductivity, and is easy to process and shape. The metal shell 11 can be formed by extrusion or bending and welding.

The insulating layer 12 may be formed on the inner side of the top wall and the inner side of the bottom wall of the metal shell 11 by electroplating, hot pressing or spraying.

Please continue to refer to Figures 4 and 5. Figure 5 is a schematic diagram of the structure of the tab support plate in the module battery of Figure 1.

The pole ear support plate 4 is installed at the open end of the shell 1, and its specific installation method is not limited. For example, in the present embodiment, four snap grooves b are respectively provided at both ends of the shell 1, two of which are provided on the top wall of the shell 1, and the other two snap grooves b are provided on the bottom wall of the shell 1. The pole ear support plate 4 is correspondingly provided with four snaps a. In the installed state, the snaps a and the snap grooves b are correspondingly connected and fixed one by one.

As configured above, during the manufacturing process of the module battery 01, the tab support plate 4 and the shell 1 are first separated from each other, and the two ends of the shell 1 are in an open state. After the battery cell unit 2 is sent into the shell 1, the tabs of the battery cell assembly 2 are then passed through the tab grooves 4a of the tab support plate 4 at the corresponding ends. At the same time, the buckle a and the buckle groove b are fixed one by one, thereby realizing the clamping and fixing of the tab support plate 4 and the shell 1, and the connection is reliable and easy to disassemble and assemble.

It can be understood that in practical applications, the number of buckles a and buckle slots b is not limited. In order to ensure installation stability, two buckle slots b can be set at one end of the shell 1, one of which is set on the top wall of the shell 1, and the other is set on the bottom wall of the shell 1; the tab support plate 4 is also correspondingly provided with two buckles a. At the same time, the setting positions of the buckle a and the buckle slot b are not limited. For example, it is feasible to set the buckle a on the shell 1 and the buckle slot b on the tab support plate 4.

In addition, in practical applications, the tab support plate 4 and the housing 1 may be fixed in other ways, such as adhesive fixing.

Please continue to refer to FIG. 6 , which is a schematic structural diagram of the tab support plate of FIG. 5 at another angle.

In this embodiment, the tab support plate 4 includes a support plate body 41, and the inner side wall of the support plate body 41 is further provided with a reinforcing rib 42, which includes at least a first rib portion extending along the extension direction of the tab slot 4a, and the tab slot 4a is located between two adjacent first rib portions.

In this way, the reinforcing ribs 42 can play a role in reinforcing the structural strength of the tab support plate 4; at the same time, the first ribs located on both sides of the tab groove 4a can also play a guiding role when the tab is inserted.

The manufacturing process of the module battery of the utility model is as follows:

The battery cell assembly 2, the elastic member 5 and the hard insulating plate 6 are stacked to form a battery cell unit, the thermal conductive adhesive 3 is coated on the top and bottom of the battery cell assembly 2, the hard insulating plates 6 on both sides are clamped by a tooling, and the battery cell unit is sent into the shell 1; then, the pole lugs of the battery cell assembly 2 are passed through the pole lug grooves 4a of the pole lug support plate 4 at the corresponding ends, and at the same time, the buckles a and the buckle grooves b are fixed one by one, so as to realize the clamping and fixing of the pole lug support plate 4 and the shell 1; finally, the pole lugs are bent and welded according to the established series-parallel mode.

Please refer to FIG. 7 , which is a schematic structural diagram of a specific embodiment of a module battery pack provided by the present invention.

The utility model also provides a module battery pack, including a plurality of the aforementioned module batteries 01, wherein the plurality of module batteries 01 are stacked, two adjacent module batteries 01 are attached to each other and bonded and fixed, and the positive electrode tab 23 of one of the two adjacent module batteries 01 is electrically connected to the negative electrode tab 24 of the other.

The modular battery pack of the utility model includes the aforementioned modular battery 01, and thus has the same technical effects as the aforementioned modular battery 01, which will not be described in detail herein.

At the same time, by adjusting the series-parallel connection mode of the module batteries 01 and the number of module batteries 01, different power requirements can be adapted; multiple module batteries 01 are fitted together to maximize the use of the space in the battery pack; two adjacent module batteries 01 are electrically connected through tab welding, which can save a lot of tabs and further reduce weight and cost.

Furthermore, as shown in FIG. 7 , two cooling plates 02 are further included. The cooling plates 02 extend along the stacking direction of the module batteries 01 . The two cooling plates 02 are disposed at both ends of the module batteries 01 . The cooling plates 02 cover the corresponding ends of each module battery 01 .

In this way, the cooling plate 02 directly cools and dissipates the heat of the tab end of the module battery 01, which can greatly improve the cooling and heat dissipation efficiency of the module battery pack.

Of course, in actual applications, depending on different heat dissipation requirements, the cooling plate 02 may not be provided, but two insulating films may be provided. The insulating films extend along the stacking direction of the module batteries 01. The two insulating films are provided at both ends of the module batteries 01. The insulating films cover the corresponding ends of each module battery 01 and only play an insulating role.

The utility model also provides a battery pack, comprising a tray and the aforementioned module battery pack, wherein the module battery pack is adhesively fixed to the tray.

The battery pack of the present invention includes the aforementioned module battery pack, and thus has the same technical effects as the aforementioned module battery pack, which will not be described in detail herein.

At the same time, since the module battery pack is bonded and fixed to the tray, there is no need to set up end plates, which can reduce the use of a large number of metal and non-metal parts and reduce the overall weight of the battery pack. The elimination of the end plates can also save the end plate welding process, reduce the process of assembly process, and require less equipment and labor, saving assembly time, improving assembly efficiency and reducing costs.

The above is a detailed introduction to a module battery, a module battery pack and a battery pack provided by the utility model. The principle and implementation method of the utility model are described in detail using specific examples. The description of the above embodiments is only used to help understand the method and core idea of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims (10)

1. A module battery, comprising: A shell (1), the shell (1) being a cylindrical structure, and both ends of the shell (1) being open ends; A battery cell assembly (2) and a thermally conductive adhesive (3), wherein the battery cell assembly (2) is mounted inside the shell (1), the thermally conductive adhesive (3) is at least filled between the top of the battery cell assembly (2) and the inner side of the top wall of the shell (1), and between the bottom of the battery cell assembly (2) and the inner side of the bottom wall of the shell (1), and both ends of the battery cell assembly (2) have pole ears; Two pole lug support plates (4), the pole lug support plates (4) being mounted correspondingly to the open ends of the shell (1), the pole lug support plates (4) having pole lug slots (4a), the pole lugs passing through the pole lug slots (4a) at the corresponding ends and exposed to the shell (1). 2. The module battery according to claim 1 is characterized in that, inside the shell (1), elastic members (5) and hard insulating plates (6) are provided on both the left and right sides of the battery cell assembly (2), and the elastic member (5) is located between the battery cell assembly (2) and the hard insulating plate (6) on the corresponding side. 3. The module battery according to claim 2, characterized in that the elastic member (5) is made of PU foam; And/or, the hard insulating board (6) is a mica board or an epoxy board. 4. The module battery according to any one of claims 1 to 3, characterized in that the housing (1) comprises a metal shell (11), and an insulating layer (12) is provided on the inner side of the top wall and the inner side of the bottom wall of the metal shell (11). 5. The module battery according to any one of claims 1 to 3, characterized in that the battery cell assembly (2) comprises a plurality of battery cell bodies (21), the plurality of battery cell bodies (21) are stacked, the tabs comprise internal tabs (22), the internal tabs (22) are used to connect the battery cell bodies (21) in series or in parallel, It also includes a single-body monitoring unit and a flexible circuit board, wherein the flexible circuit board is electrically connected to each of the internally connected pole ears (22), and the single-body monitoring unit is electrically connected to the flexible circuit board. 6. The module battery according to any one of claims 1 to 3 is characterized in that one of the shell (1) and the tab support plate (4) is provided with a buckle (a), and the other is provided with a buckle groove (b), and in the installed state, the buckle (a) and the buckle groove (b) are fixed in a one-to-one corresponding manner. 7. The module battery according to any one of claims 1 to 3 is characterized in that the pole lug support plate (4) includes a support plate body (41), and the inner wall of the support plate body (41) is also provided with a reinforcing rib (42), and the reinforcing rib (42) includes at least a first rib portion extending along the extension direction of the pole lug groove (4a), and the pole lug groove (4a) is located between two adjacent first rib portions. 8. A module battery pack, characterized in that it comprises a plurality of module batteries (01) according to any one of claims 1 to 7, wherein the plurality of module batteries (01) are stacked, two adjacent module batteries (01) are bonded to each other and fixed, and among two adjacent module batteries (01), the positive electrode tab (23) of one is electrically connected to the negative electrode tab (24) of the other. 9. The module battery pack according to claim 8, characterized in that it further comprises two insulating films, the insulating films extending along the stacking direction of the module batteries (01), the two insulating films being arranged at both ends of the module batteries (01), and the insulating films covering corresponding ends of each of the module batteries (01); Or, it further comprises two cooling plates (02), wherein the cooling plates (02) extend along the stacking direction of the module batteries (01), the two cooling plates (02) are arranged at both ends of the module batteries (01), and the cooling plates (02) cover the corresponding ends of each module battery (01). 10. A battery pack, comprising a tray, characterized in that it also comprises the module battery pack according to any one of claims 8 to 9, wherein the module battery pack is adhesively fixed to the tray.