CN221530193U - Battery module - Google Patents

Abstract

The utility model relates to a battery module, which belongs to the technical field of batteries and comprises at least two battery core modules and a connecting module, wherein each battery core module comprises a plurality of battery core units, the battery core units are arranged at intervals along a second direction perpendicular to a first direction, the connecting module comprises a plurality of first connecting monomers and at least one second connecting monomer, each first connecting monomer corresponds to two adjacent battery core units, the plane unfolding structure of the second connecting monomer is consistent with the structure of the first connecting monomer, and each second connecting monomer corresponds to two adjacent battery core modules. Because the plane unfolding structure of the second connecting monomer is consistent with the structure of the first connecting monomer, the electric connection is carried out on each cell unit through the conductor with the same structure, and because the conductor structures are the same, the internal resistances of the cell units are the same, the consistency of the internal resistances among the cell modules can be ensured, and the service life of the whole module is further ensured.

Description

Battery module

Technical Field

The utility model relates to a battery module, and belongs to the technical field of batteries.

Background

The Pack module is composed of a plurality of battery core modules in series-parallel connection, and each battery core module is composed of a plurality of battery core monomers in series-parallel connection through conductors. Before the battery cell module is assembled, the battery cell monomers are generally subjected to internal resistance selection, the battery cell monomers with similar internal resistances are selected for module assembling, the problem that when current flows through the battery cell monomers due to large difference of the internal resistances, large voltage drop is generated, output voltage is reduced, heating of the battery cell is increased, the service life of the battery cell monomers is influenced, and finally the service life of the whole pack module is limited.

In the prior art, a plurality of battery core modules are electrically connected with the battery core monomers through a plurality of conductors with different structures, and the internal resistances of the conductors are different due to different structures of the conductors, so that the internal resistances of the battery core modules are different, and the service life of the whole pack module is further influenced.

Disclosure of utility model

Based on the above, the present utility model aims to provide a battery module capable of ensuring the consistency of internal resistances among the battery cell modules.

The utility model provides a battery module, comprising:

at least two cell modules arranged in a first direction; and

A connection module for connecting the at least two cell modules,

Wherein each of the cell modules comprises:

a plurality of battery cells arranged at intervals along a second direction perpendicular to the first direction,

The connection module includes:

A plurality of first connection units, each corresponding to two adjacent battery core units,

With respect to the second direction, two adjacent battery cells in each battery cell module are connected through the same first connection monomer; and

At least one second connection unit, the plane unfolding structure of the second connection unit is consistent with the structure of the first connection unit, each second connection unit corresponds to two adjacent electric core modules,

And with respect to the second direction, two adjacent battery cells positioned at the first side edge position in the two adjacent battery cell modules are connected through the same second connecting unit.

In one embodiment, each of the battery cells includes a plurality of battery cells arranged at intervals along a third direction that is perpendicular to both the first direction and the second direction,

The first connecting unit is provided with a plurality of first connecting parts with consistent structures, the second connecting unit is provided with a plurality of second connecting parts with consistent structures, the structures of the first connecting parts are consistent with the structures of the second connecting parts,

Each first connecting portion and each second connecting portion correspond to one lug end of one battery cell unit respectively, and the first connecting portions and the second connecting portions are connected with the corresponding lug ends of the battery cell units respectively.

In one embodiment, the first connecting unit comprises a first part and a second part corresponding to the first part, a plurality of first connecting parts are arranged on the first part and the second part, the first connecting parts on the first part are in one-to-one correspondence with the first connecting parts on the second part,

The positive tab end of each cell unit is connected to one of the first connecting parts on the first part or the first connecting parts on the second part, and the negative tab end of each cell unit is connected to the other one of the first connecting parts and the second connecting parts.

In one embodiment, the second connecting unit comprises a first part and a second part corresponding to the first part, a plurality of second connecting parts are arranged on the first part and the second part, the second connecting parts on the first part are in one-to-one correspondence with the second connecting parts on the second part,

The positive tab end of each cell unit is connected to one of the plurality of second connection parts on the first part or the plurality of second connection parts on the second part, and the negative tab end of each cell unit is connected to the other one of the two.

In one embodiment, the connection module further comprises:

Two third connecting monomers, the plane unfolding structure of the third connecting monomers is consistent with the structure of the first connecting monomers,

And with respect to the first direction, two battery cell modules positioned at the outermost sides are respectively provided with a third connecting monomer, each third connecting monomer is connected with the battery cell unit positioned at a second side edge position in the battery cell module, and the second side edge position is opposite to the first side edge position.

In one embodiment, the third connecting unit is provided with a plurality of third connecting parts with consistent structures, the structures of the third connecting parts are consistent with those of the first connecting parts,

Each third connecting part in one of the two third connecting monomers is respectively connected with the positive lug end of each battery cell monomer so that the third connecting monomer forms a positive terminal,

And each third connecting part in the other is respectively connected with the negative electrode lug end of each cell unit so that the third connecting unit forms a negative electrode terminal.

In one embodiment, the positive and negative directions of the battery cells in the same battery cell unit are the same,

With respect to the second direction, the positive and negative directions of each cell unit in one of the two adjacent cell units are opposite to the positive and negative directions of each cell unit in the other cell unit.

In one embodiment, each of the cell modules further comprises:

And the brackets extend on planes defined by the second direction and the third direction, and a plurality of battery cells in the same battery cell module are mounted on the same bracket.

In one embodiment, the bracket comprises two bracket plates arranged at intervals along the first direction, and a plurality of the battery cells in the same battery cell module are positioned between the two bracket plates;

each support plate is provided with a plurality of positioning accommodating holes, any one positioning accommodating hole on one support plate and a corresponding positioning accommodating hole on the other support plate form a limiting space, and each battery cell monomer is positioned in one limiting space;

Each supporting plate is provided with a positioning accommodating groove communicated with all the limiting spaces on the surface deviating from the limiting spaces, and part or all of the first connecting monomer, the second connecting monomer and the third connecting monomer are positioned in the positioning accommodating groove and connected with each battery cell monomer.

In one embodiment, the surface of the support plate facing away from the limiting space is further provided with a plurality of blocking protruding portions arranged at intervals, the positioning accommodating grooves are formed among the blocking protruding portions, and each blocking protruding portion corresponds to one positioning accommodating hole.

Therefore, compared with the prior art, the utility model has the following advantages:

According to the battery module, the battery module comprises at least two battery core modules and connecting modules, the at least two battery core modules are arranged along a first direction, the connecting modules enable the at least two battery core modules to be connected, each battery core module comprises a plurality of battery core units, the plurality of battery core units are arranged at intervals along a second direction perpendicular to the first direction, the connecting modules comprise a plurality of first connecting monomers and at least one second connecting monomer, each first connecting monomer corresponds to two adjacent battery core units, relative to the second direction, two adjacent battery core units in each battery core module are connected through the same first connecting monomer, the plane unfolding structure of each second connecting monomer is consistent with the structure of the first connecting monomer, each second connecting monomer corresponds to two adjacent battery core modules, relative to the second direction, two battery core units located at the edge positions of the first side in the two adjacent battery core modules are connected through the same second connecting monomer, two adjacent battery core units in each battery core module are connected through the first connecting monomer, and the service life of each adjacent battery core module can be guaranteed due to the fact that the two adjacent battery core units are located at the same edge positions in the same first side through the same connecting monomer, and the same plane unfolding structure of each battery core module can be guaranteed.

Drawings

Fig. 1 is a schematic perspective view of a battery module according to the present embodiment;

fig. 2 is a schematic view of an exploded structure of the battery module according to the present embodiment;

Fig. 3 is a schematic diagram of a connection structure of the battery cell module and the connection module in a first direction in the present embodiment;

fig. 4 is a schematic diagram of a connection structure of the battery cell module and the connection module in the second direction in the present embodiment;

Fig. 5 is a schematic diagram of a connection structure between two battery cells and a second connection unit in the present embodiment;

fig. 6 is a schematic perspective view of a cell module portion in this embodiment.

Reference numerals:

100. A battery module;

10. a cell module; 11. a cell unit; 111. a cell unit;

12. A bracket; 121. a support plate; 121a, positioning the accommodating hole; 121b, positioning the accommodating groove; 121c, blocking the protruding portion; 1121c, bumps;

13. an insulating plate;

20. A connection module;

21. a first connection unit; 211. a first connection portion; 212. a main body; 212a, rectangular through slots; 213. a bending part;

22. a second linking monomer; 221. a second connecting portion;

23. a third linking monomer; 231. and a third connecting part.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

The present embodiment provides a battery module capable of ensuring the uniformity of internal resistances among the respective battery modules 10.

Fig. 1 is a schematic perspective view of a battery module according to the present embodiment; fig. 2 is a schematic view of an exploded structure of the battery module according to the present embodiment.

Referring to fig. 1 to 2, an embodiment of the present utility model provides a battery module 100 including at least two battery cell modules 10 and a connection module 20. At least two of the cell modules 10 are arranged in a first direction. The connection module 20 connects at least two cell modules 10. Each cell module 10 includes a plurality of cell units 11, and the plurality of cell units 11 are arranged at intervals along a second direction perpendicular to the first direction. The connection module 20 includes a plurality of first connection units 21 and at least one second connection unit 22. Each first connection unit 21 corresponds to two adjacent battery cells 11. With respect to the second direction, two adjacent battery cells 11 in each battery module 10 are connected by the same first connection unit 21. The planar deployment structure of the second connection cells 22 corresponds to the structure of the first connection cell 21, and each second connection cell 22 corresponds to two adjacent cell modules 10. With respect to the second direction, two battery cells 11 located at the first side edge positions in two adjacent battery modules 10 are connected by the same second connection unit 22.

As can be appreciated, two adjacent cell units 11 in each cell module 10 are connected through a first connection unit 21, two adjacent cell units 11 located at the edge position of the first side in two adjacent cell modules 10 are connected through the same second connection unit 22, and as the plane unfolding structure of the second connection unit 22 is consistent with the structure of the first connection unit 21, the cell units 11 are electrically connected through conductors with the same structure, and as the conductor structures are the same, the internal resistances of the cell units 11 are the same, so that the consistency of the internal resistances between the cell modules 10 can be ensured, and the service life of the whole module is further ensured.

The direction shown in fig. 1a is a first direction, and the direction shown in fig. B is a second direction.

In this embodiment, the number of cell modules 10 is two. Of course, in other alternative embodiments, the number of cell modules 10 may be more than two, without limitation.

It should be noted that, in this embodiment, all the connection units are electrically connected to the battery cell unit.

Fig. 3 is a schematic diagram of a connection structure of the battery cell module and the connection module in a first direction in the present embodiment; fig. 4 is a schematic diagram of a connection structure of the battery cell module and the connection module in the second direction in the present embodiment.

As shown in fig. 3 to 4, each of the battery cells 11 includes a plurality of battery cells 111 arranged at intervals along a third direction that is perpendicular to both the first direction and the second direction. The first connection unit 21 has a plurality of first connection portions 211 having a uniform structure, and the second connection unit 22 has a plurality of second connection portions 221 having a uniform structure, and the structure of the first connection portion 211 is uniform with that of the second connection portions 221. Each first connection portion 211 and each second connection portion 221 respectively correspond to one tab end of one cell unit 111, and the first connection portion 211 and the second connection portion 221 are respectively connected with the tab end of the corresponding cell unit 111.

As can be appreciated, the structures of the first connection portions 211 and the second connection portions 221 are identical, so that the internal resistances of the battery cells 111 are identical, so that the internal resistances of the battery cells 11 are identical, and the internal resistances of the battery modules 10 are identical.

The direction shown in fig. 1C is a third direction.

In this embodiment, the first connection unit 21 has a rectangular sheet-shaped main body 212, the main body 212 has a plurality of rectangular through grooves 212a, the plurality of rectangular through grooves 212a are arranged at equal intervals along the length direction of the main body 212, and portions corresponding to each corner of the rectangular through grooves 212a respectively form a first connection portion 211.

The first connection unit 21 further has a bending portion 213 formed at an edge of the main body 212, the bending portion 213 is bent at a certain angle with respect to the main body 212, and the bending portion 213 extends to one side of the side portion of the cell module 10, so that the connection at the bending portion 213 is convenient for voltage detection.

The unfolded structure of the second connection unit 22 corresponds to the structure of the first connection unit 21, and specifically, the second connection unit 22 is folded from the structure of the first connection unit 21 with a center line in the width direction.

As shown in connection with fig. 3 to 4, the first connection unit 21 includes a first portion and a second portion corresponding to the first portion. The first part and the second part are respectively provided with a plurality of first connecting parts 211, and the first connecting parts 211 on the first part are in one-to-one correspondence with the first connecting parts 211 on the second part. The positive tab end of each cell 111 is connected to one of the first connection portions 211 on the first portion or the first connection portions 211 on the second portion, and the negative tab end of each cell 111 is connected to the other.

It will be appreciated that the individual cells 111 in the same cell 11 are connected in parallel and the individual cells 11 are connected in series to output a consistent voltage and current as required by the product.

In this embodiment, the plurality of first connection units 21 are respectively installed at two ends of the cell module 10 in the first direction, wherein the first connection units 21 at the first end and the first connection units 21 at the second end are arranged in a staggered manner, and the number of the first connection units is different by one. Specifically, three first connection units 21 disposed at intervals in the second direction and adjacent in sequence are exemplified: the first connecting unit 21 is located at the first end, the second first connecting unit 21 is located at the second end and is offset from the first connecting unit 21, the third first connecting unit 21 is located at the first end and is offset from the second first connecting unit 21, and so on.

Fig. 5 is a schematic diagram of a connection structure between two battery cells and a second connection unit in the present embodiment.

As shown in connection with fig. 5, the second connection unit 22 includes a first portion and a second portion corresponding to the first portion. The first part and the second part are respectively provided with a plurality of second connecting parts 221, and the second connecting parts 221 on the first part are in one-to-one correspondence with the second connecting parts 221 on the second part. The positive tab end of each cell 111 is connected to one of the plurality of second connection parts 221 on the first portion or the plurality of second connection parts 221 on the second portion, and the negative tab end of each cell 111 is connected to the other.

It can be appreciated that the positive tab terminal of the cell 111 in one of the corresponding two cell units 11 in the two adjacent cell modules 10 is connected to the negative tab terminal of the cell 111 in the other cell module by the second connection unit 22, so as to realize the electrical connection between the respective cell units 11 in the two adjacent cell modules 10.

As shown in fig. 2 to 3, the connection module 20 further includes two third connection units 23, and the planar unfolding structure of the third connection units 23 is identical to that of the first connection unit 21. With respect to the first direction, the two outermost cell modules 10 are respectively provided with a third connection unit 23, and each third connection unit 23 is connected to the cell unit 11 located at the second side edge position in the cell module 10, where the second side edge position is opposite to the first side edge position.

As can be appreciated, since the planar unfolding structure of the third connection unit 23 is consistent with the structure of the first connection unit 21, the internal resistances of the two battery cells 11 located at the second side edge position are consistent with the internal resistances of the other battery cells 11, so that the internal resistances of all the battery cells 111 are consistent, and the consistency of the internal resistances among the battery cell modules 10 can be further ensured.

As shown in fig. 1 to 4, the third connection unit 23 has a plurality of third connection parts 231 having the same structure, and the structure of the third connection parts 231 is identical to that of the first connection parts 211. Each third connection part 231 in one of the two third connection units 23 is respectively connected with the positive tab end of each cell unit 111, so that the third connection unit 23 forms a positive terminal; each third connection 231 in the other is connected to the negative ear terminal of each cell 111, so that the third connection cell 23 forms a negative terminal.

As can be appreciated, since the structures of the respective third connection parts 231 and the respective first connection parts 211 are identical, so as to ensure that the internal resistances of the respective battery cells 111 are identical, so as to ensure that the internal resistances of the respective battery cells 11 are identical, the two third connection cells 23 can be respectively used as the positive electrode terminal and the negative electrode terminal, so that the wiring requirements can be satisfied.

In this embodiment, the unfolding structure of the third connection unit 23 is consistent with that of the first connection unit 21, specifically, the third connection unit 23 is formed by bending the structure of the first connection unit 21 along the center line in the width direction, and the bent portions of the two third connection units 23 extend to the same side of the side portion of the cell module 10 to form a positive terminal and a negative terminal respectively.

As shown in fig. 2 to 3, the positive and negative directions of the respective battery cells 111 in the same battery cell unit 11 are the same. With respect to the second direction, each of the battery cells 111 in one of the two adjacent battery cells 11 is opposite to the positive and negative directions of each of the battery cells 111 in the other.

It can be understood that, after the first connection portion 211 of the first portion in the same first connection unit 21 is connected to the positive tab end of each cell 111 in the corresponding cell unit 11, the first connection portion 211 of the second portion can be connected to the negative tab end of each cell 111 in the corresponding cell unit 11, and since the two cell units 11 corresponding to the first connection portion 211 of the first portion and the first connection portion 211 of the second portion are two adjacent cell units 11, the plurality of first connection units 21 in the same cell module 10 can be divided into two groups and arranged at equal intervals along the second direction, so as to ensure that the internal resistances between the cell modules 10 are consistent.

Fig. 6 is a schematic perspective view of a cell module portion in this embodiment.

As shown in connection with fig. 6, the cell module 10 further includes a holder 12, and the holder 12 extends in a plane defined by the second direction and the third direction. A plurality of battery cells 11 in the same battery module 10 are mounted on the same holder 12.

It can be appreciated that a plurality of battery cells 11 in the same battery cell module 10 can be combined into a unitary structure by the bracket 12 so that the plurality of battery cells 10 are two by two to form the battery module 100.

As shown in fig. 6, the holder 12 includes two holder plates 121 disposed at intervals along the first direction, and the plurality of battery cells 11 in the same battery module 10 are located between the two holder plates 121. Each support plate 121 is provided with a plurality of positioning accommodating holes 121a, wherein any one positioning accommodating hole 121a on one support plate 121 and a corresponding positioning accommodating hole 121a on the other support plate 121 form a limiting space, and each battery cell unit 111 is positioned in the limiting space. The surface of each support plate 121, which is away from the limiting space, is provided with a positioning accommodating groove 121b which is communicated with all the limiting space, and part or all of the first connecting monomer 21, the second connecting monomer 22 and the third connecting monomer 23 are positioned in the positioning accommodating groove 121b and connected with each cell unit 111.

It can be understood that, a limit space formed by two aligned positioning receiving holes 121a on two support plates 121 can position and install one battery cell unit 111, so that positioning and installing of each battery cell unit 111 can be realized, in addition, positioning and installing of each first connection unit 21, each second connection unit 22 and each third connection unit 23 can be realized through a positioning receiving groove 121b, and after installation, the battery cell units 111 in each limit space can be connected.

As shown in fig. 6, the surface of the support plate 121 facing away from the limiting space is further provided with a plurality of blocking protrusions 121c disposed at intervals, positioning accommodating grooves 121b are formed between the blocking protrusions 121c, and each blocking protrusion 121c corresponds to one positioning accommodating hole 121a. A portion of each blocking protrusion 121c extends into a projection area of the corresponding positioning receiving hole 121a on the surface of the support plate 121. The end of the battery cell 111 abuts against the corresponding blocking protrusion 121c, so that the tab end of the battery cell 111 is located at the connection and communication position between the positioning accommodating hole 121a and the positioning accommodating groove 121 b.

It can be understood that, the electric core unit 111 can be limited between the two support plates 121 through the abutting fit between the electric core unit 111 and the two corresponding blocking protruding parts 121c, so that the positioning and mounting of the electric core unit 111 on the support 12 is further realized, and the tab ends of the electric core unit 111 can be accurately positioned at the connection and communication positions of the positioning accommodating hole 121a and the positioning accommodating groove 121b, so that the connection between the tab ends of the electric core unit 111 after the installation of the first connection unit 21, the second connection unit 22 and the third connection unit 23 is ensured.

As shown in fig. 6, each blocking protrusion 121c includes four protrusions 1121c, and the four protrusions 1121c are disposed at equal intervals along the circumferential direction of the positioning receiving hole 121a, and the protrusions 1121c in each blocking protrusion 121c protrude by the same distance with respect to the surface of the support plate 121, so that a positioning receiving groove 121b is formed on the surface of the support plate 121 facing away from the limiting space.

As shown in fig. 2, the battery cell module 10 further includes two insulating plates 13, and the two insulating plates 13 are respectively fixed on the surfaces of the two support plates 121 facing away from the battery cell unit 11 and cover the corresponding positioning accommodating grooves 121b.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. A battery module, comprising:

At least two cell modules (10) arranged in a first direction; and

A connection module (20) for connecting the at least two cell modules (10),

Wherein each of the cell modules (10) comprises:

a plurality of battery cells (11) arranged at intervals along a second direction perpendicular to the first direction,

The connection module (20) comprises:

A plurality of first connection units (21), each first connection unit (21) corresponding to two adjacent battery cells (11),

With respect to the second direction, two adjacent battery cells (11) in each battery cell module (10) are connected through the same first connecting monomer (21); and

At least one second connection unit (22), wherein the plane unfolding structure of the second connection unit (22) is consistent with the structure of the first connection unit (21), each second connection unit (22) corresponds to two adjacent battery cell modules (10),

With respect to the second direction, two adjacent battery cell units (11) positioned at the first side edge position in two adjacent battery cell modules (10) are connected through the same second connecting monomer (22).

2. The battery module according to claim 1, wherein the battery module comprises,

Each of the battery cells (11) includes a plurality of battery cells (111) arranged at intervals along a third direction that is perpendicular to both the first direction and the second direction,

The first connecting unit (21) is provided with a plurality of first connecting parts (211) with consistent structures, the second connecting unit (22) is provided with a plurality of second connecting parts (221) with consistent structures, the structures of the first connecting parts (211) are consistent with the structures of the second connecting parts (221),

Each first connecting portion (211) and each second connecting portion (221) respectively correspond to one tab end of one electric core unit (111), and the first connecting portion (211) and the second connecting portion (221) are respectively connected with the tab end of the corresponding electric core unit (111).

3. The battery module according to claim 2, wherein,

The first connecting unit (21) comprises a first part and a second part corresponding to the first part, a plurality of first connecting parts (211) are arranged on the first part and the second part, the first connecting parts (211) on the first part are in one-to-one correspondence with the first connecting parts (211) on the second part,

The positive tab end of each cell unit (111) is connected to one of the first connection parts (211) on the first part or the first connection parts (211) on the second part, and the negative tab end of each cell unit (111) is connected to the other one of the first connection parts and the second connection parts.

4. The battery module according to claim 2 or 3, wherein,

The second connecting unit (22) comprises a first part and a second part corresponding to the first part, a plurality of second connecting parts (221) are respectively arranged on the first part and the second part, the second connecting parts (221) on the first part are in one-to-one correspondence with the second connecting parts (221) on the second part,

The positive tab end of each cell unit (111) is connected to one of the plurality of second connection parts (221) on the first part or the plurality of second connection parts (221) on the second part, and the negative tab end of each cell unit (111) is connected to the other one of the two.

5. The battery module according to claim 2 or 3, wherein,

The connection module (20) further comprises:

Two third connection units (23), wherein the plane unfolding structure of the third connection units (23) is consistent with the structure of the first connection units (21),

With respect to the first direction, two outermost cell modules (10) are respectively provided with one third connecting unit (23), each third connecting unit (23) is connected to the cell unit (11) located at a second side edge position in the cell module (10), and the second side edge position is opposite to the first side edge position.

6. The battery module according to claim 5, wherein,

The third connecting unit (23) is provided with a plurality of third connecting parts (231) with consistent structures, the structures of the third connecting parts (231) are consistent with the structures of the first connecting parts (211),

Each third connecting part (231) in one of the two third connecting monomers (23) is respectively connected with the positive lug end of each electric core monomer (111) so that the third connecting monomer (23) forms a positive terminal,

Each third connecting part (231) in the other is respectively connected with the negative electrode lug end of each cell unit (111) so that the third connecting unit (23) forms a negative electrode terminal.

7. The battery module according to claim 3, wherein,

The positive and negative directions of the battery cells (111) in the same battery cell unit (11) are the same,

With respect to the second direction, each of the battery cells (111) in one of the two adjacent battery cells (11) is opposite to the positive and negative directions of each of the battery cells (111) in the other.

8. The battery module according to claim 5, wherein,

Each of the cell modules (10) further comprises:

-a support (12) extending in a plane defined by said second direction and said third direction, a plurality of said cells (11) in a same said cell module (10) being mounted on a same said support (12).

9. The battery module according to claim 8, wherein the battery module comprises,

The bracket (12) comprises two bracket plates (121) which are arranged at intervals along the first direction, and a plurality of battery cells (11) in the same battery cell module (10) are positioned between the two bracket plates (121);

Each support plate (121) is provided with a plurality of positioning accommodating holes (121 a), one arbitrary positioning accommodating hole (121 a) on one support plate (121) and a corresponding positioning accommodating hole (121 a) on the other support plate (121) form a limiting space, and each battery cell (111) is positioned in one limiting space;

Each support plate (121) is provided with a positioning accommodating groove (121 b) which is communicated with all the limiting space on the surface deviating from the limiting space, and part or all of the first connecting monomer (21), the second connecting monomer (22) and the third connecting monomer (23) are positioned in the positioning accommodating groove (121 b) and connected with each cell monomer (111).

10. The battery module according to claim 9, wherein the battery module comprises,

The surface of the support plate (121) deviating from the limiting space is also provided with a plurality of blocking convex parts (121 c) which are arranged at intervals, a plurality of positioning accommodating grooves (121 b) are formed between the blocking convex parts (121 c), and each blocking convex part (121 c) corresponds to one positioning accommodating hole (121 a).