CN220086304U

CN220086304U - Battery cell module and electricity utilization device

Info

Publication number: CN220086304U
Application number: CN202321399073.3U
Authority: CN
Inventors: 陈圣立; 张瑞朋
Original assignee: Jiangsu Zenergy Battery Technologies Co Ltd
Current assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Priority date: 2023-06-02
Filing date: 2023-06-02
Publication date: 2023-11-24
Anticipated expiration: 2033-06-02

Abstract

The utility model discloses a battery core module and an electricity utilization device, which relate to the technical field of power batteries, wherein a battery core is electrically connected with an electric connection plate through an electric elastic piece, so that the battery core can be electrically conducted outwards through the electric connection plate.

Description

Battery cell module and electricity utilization device

Technical Field

The utility model relates to the technical field of power batteries, in particular to an electric core module and an electric device.

Background

With the rapid development of electric vehicles and energy storage technologies, the capacity is increased, so that the number of battery cells in a battery pack is increased, and the electric vehicle is popular with the fast-charging masses. How to connect all the cells in the battery pack is a key point to be considered by all new energy enterprises in terms of production and manufacture.

The electrical connections between the module cells at the present stage are typically soldered via tabs, which results in damage to one of the cells that is not singly replaced. The other part is that the screw fastening is completed, which results in inefficiency and larger contact resistance, and more heat generation. How to quickly and simply replace the battery cells and reduce the generation of heat becomes an important component of the battery pack design.

Disclosure of Invention

The utility model aims to provide a battery cell module and an electric device, which are used for reliably connecting a battery cell with an electric connection plate, so that the contact resistance of the battery cell is reduced, the overcurrent temperature rise is reduced, and meanwhile, the battery cell is conveniently detached through the connection of an electric spring piece.

In a first aspect, the present utility model provides a battery cell module, including:

an electrical connection board;

the battery cell and the electric elastic piece are at least one battery cell which is electrically connected with the electric connecting plate and/or the battery cell through the electric elastic piece, so that the battery cell can conduct electricity outwards.

In an alternative embodiment, all of the cells are divided into at least one set of cell assemblies comprising at least two cells arranged in a first direction;

in the group of the electric core components, two adjacent electric cores are electrically connected through the electric elastic pieces, and the two electric cores positioned at the head end and the tail end are respectively electrically connected to one electric connecting plate through the electric elastic pieces.

In an alternative embodiment, each of the cells has a first side and a second side on opposite sides of the first direction, the polarities of the first side and the second side being opposite;

in two adjacent electric cores of a group of electric core assemblies, a first side of one electric core is electrically connected with a second side of the other electric core through the electric elastic sheet;

and one sides of the two electric cores, which are positioned at the head end and the tail end of the electric core assembly, are respectively and electrically connected with one electric connection plate through the electric elastic pieces.

In an alternative embodiment, two adjacent groups of the cell assemblies are divided into a first cell assembly and a second cell assembly; the first sides of all the cells in the first cell assembly are oriented the same or opposite as the first sides of all the cells in the second cell assembly;

the electric connection plates comprise a first electric connection plate, a second electric connection plate and a third electric connection plate;

the two electric cores positioned at the head end and the tail end in the electric core assembly are respectively a first electric core and a second electric core; the first battery cell assembly and the second battery cell assembly are arranged in parallel;

in the first electric core assembly, a first side of the first electric core is electrically connected to the first electric connection plate through the electric elastic sheet, and a second side of the second electric core is electrically connected to the second electric connection plate through the electric elastic sheet;

in the second electric core assembly, a first side of the first electric core is electrically connected to the first electric connection plate through the electric elastic sheet, and a second side of the second electric core is electrically connected to the third electric connection plate through the electric elastic sheet; or alternatively, the first and second heat exchangers may be,

the second side of the second electric core is electrically connected to the first electric connection plate through the electric elastic sheet, and the first side of the first electric core is electrically connected to the third electric connection plate through the electric elastic sheet.

In an alternative embodiment, the orientation of the first side of all of the cells in the first cell assembly is opposite to the orientation of the first side of all of the cells in the second cell assembly;

a mounting groove is formed in the first side of each electric core, and the electric elastic sheet is arranged in the mounting groove;

the first side of one of the adjacent two electric cores in each group of electric core assemblies is abutted against the electric elastic sheet in the mounting groove on the other electric core;

the first electric connecting plate is provided with a first accommodating groove, the second electric connecting plate is provided with a second accommodating groove, and the first accommodating groove and the second accommodating groove are respectively provided with the electric elastic sheet;

in the first electric core assembly, the electric elastic sheet in the mounting groove on the first electric core is abutted with the first electric connecting plate, and the second side of the second electric core is abutted with the electric elastic sheet in the second accommodating groove;

in the second electric core assembly, the second side of the second electric core is abutted against the electric elastic sheet in the first accommodating groove, and the electric elastic sheet in the mounting groove on the first electric core is abutted against the third electric connecting plate.

In an alternative embodiment, two electrodes with opposite polarities are arranged on the same side of each electric core, and each electrode is abutted against one electric connection plate through the electric elastic sheet.

In an alternative embodiment, the electrical connection board is provided with a third accommodating groove, and the electrical elastic sheet is arranged in the third accommodating groove.

In an alternative embodiment, the electrode is arranged on the electric core in a protruding way, and the electrode is inserted into the third accommodating groove;

or alternatively, the first and second heat exchangers may be,

the electrode is arranged on the battery cell in a protruding mode, the outer diameter of the electrode is larger than the inner diameter of the third accommodating groove, and the electrode is abutted to the electric connection plate and surrounds the area outside the third accommodating groove.

In an alternative embodiment, the battery cell module further comprises a radiator and/or a pressing strip, and the radiator is abutted against one side of the electric connection plate, which is far away from the battery cell; the pressing strip is abutted to one side, far away from the electric connection plate, of the electric core.

In a second aspect, the present utility model provides an electrical device, including a battery cell module according to any one of the foregoing embodiments.

In accordance with an embodiment of the present utility model,

the electric core and the electric connection plate are electrically connected through the electric elastic piece, so that the electric core can be electrified and the electric connection plate is outwards conductive, the electric core and the electric connection plate can be reliably connected through elastic deformation of the electric elastic piece, contact resistance is reduced, overcurrent temperature rise is reduced, and meanwhile, the electric core is conveniently detached through the electric elastic piece connection.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a perspective view of a first embodiment of a battery cell module;

FIG. 2 is one of the explosion diagrams of FIG. 1;

FIG. 3 is a second exploded view of FIG. 1;

FIG. 4 is a schematic view of parallel fingers;

FIG. 5 is a schematic diagram of a first embodiment cell;

fig. 6 is a perspective view of a second embodiment of a battery cell module;

FIG. 7 is an exploded view of FIG. 6;

FIG. 8 is a schematic diagram of an electrical connection board and an electrical spring according to a second embodiment;

FIG. 9 is a partial cross-sectional view of FIG. 6;

fig. 10 is a diagram showing the correspondence between the cut surface of the cell and the electrical connection plate.

Icon: 10-an electrical connection board; 11-a first electrical connection board; 110-a first accommodation groove; 12-a second electrical connection board; 120-a second accommodating groove; 13-a third electrical connection board; 14-a third accommodating groove; 20-an electric core; 21-a first side; 210-mounting slots; 22-a second side; 23-a first cell; 24-a second cell; 30-an electrical spring; 41-a first cell assembly; 42-a second cell assembly; 50-layering; 60-heat sink.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Some embodiments of the present utility model are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.

First embodiment

Referring to fig. 1 to 3, the present embodiment discloses a battery cell module, which includes:

an electrical connection board 10;

at least one electric core 20 and electrical shrapnel 30, electric core 20 is connected to electric connecting plate 10 through electrical shrapnel 30 electricity to make electric core 20 outwards electrically conductive through electric connecting plate 10.

In this embodiment, the electrical core 20 is electrically connected with the electrical connection board 10 through the electrical elastic sheet 30, so that the electrical core 20 can be electrically connected with the electrical connection board 10 outwards, and the electrical elastic sheet 30 has elasticity, so that the electrical core 20 and the electrical connection board 10 can be reliably connected through elastic deformation of the electrical elastic sheet, the contact resistance of the electrical core is reduced, the overcurrent temperature rise is reduced, and meanwhile, the electrical core 20 is conveniently detached through the connection of the electrical elastic sheet 30.

The electrical shrapnel 30 can be a contact finger, preferably a parallel contact finger as shown in fig. 4, the contact resistance between the parallel contact finger and the pole piece of the electrical core 20 is smaller, the temperature rise caused by the contact resistance can be reduced better, the parallel contact finger has no front and back sides compared with other contact fingers, the installation is convenient, and the thickness of the parallel contact finger is smaller compared with other contact fingers such as spring contact fingers and contact rings, so that the space waste can be reduced, and the energy density is improved.

The material of the electric connection plate 10 can be aluminum, so that the electric connection plate has better heat conduction performance under the condition of better electric conduction performance, and can play a certain role in heat dissipation.

In this embodiment, all the cells 20 may be divided into at least one group of cell 20 assemblies, and the cell 20 assemblies include at least two cells 20 arranged along the first direction; in a group of electric core 20 assemblies, two adjacent electric cores 20 are electrically connected through an electrical elastic sheet 30, and two electric cores 20 positioned at the front end and the rear end are respectively electrically connected to one electric connection plate 10 through the electrical elastic sheet 30.

Therefore, two electric cores 20 are connected in series to form a group of electric core 20 assemblies through the electric elastic sheet 30, so that temperature rise caused by overlarge contact resistance between the electric cores 20 and the electric cores 20 can be reduced, and then the electric core 20 assemblies are electrically connected to one electric connecting plate 10 through the electric elastic sheet 30, so that energy density can be improved. Moreover, as the electric elastic pieces 30 are adopted between the electric cores 20 and the electric connection plate 10 to realize electric connection, if one of the electric cores 20 is damaged, the damaged electric core 20 can be conveniently detached and replaced, so that the safety of electric connection is ensured, and compared with the prior art that the electric connection is realized by adopting a welding or screw mode between the electric cores 20 and the electric cores 20, the electric core 20 can be conveniently, quickly and simply replaced, and the operation is simple.

Referring to fig. 5, each of the battery cells 20 has a first side 21 and a second side 22 on opposite sides in the first direction, and the polarities of the first side 21 and the second side 22 are opposite; in two adjacent cells 20 of a set of cell 20 assemblies, a first side 21 of one cell 20 is electrically connected to a second side 22 of the other cell 20 through an electrical spring 30; the sides of a group of battery cells 20, which are positioned at the front end and the rear end of the battery cell 20 and are away from each other, are respectively and electrically connected with an electric connection plate 10 through an electric elastic sheet 30. By the arrangement, each group of battery cells 20 can be connected in series to form a whole, and the energy density is improved.

Dividing adjacent two sets of cell 20 assemblies into a first cell assembly 41 and a second cell assembly 42;

with continued reference to fig. 1-3, in this embodiment, the orientation of the first sides 21 of all of the cells 20 in the first cell assembly 41 is opposite to the orientation of the first sides 21 of all of the cells 20 in the second cell assembly 42;

specifically, the electrical connection board 10 includes a first electrical connection board 11, a second electrical connection board 12, and a third electrical connection board 13; two electric cores 20 positioned at the head and tail ends in the electric core 20 assembly are respectively a first electric core 23 and a second electric core 24; the first cell assembly 41 and the second cell assembly 42 are arranged in parallel; in the first electrical core assembly 41, the first side 21 of the first electrical core 23 is electrically connected to the first electrical connection board 11 through the electrical elastic sheet 30, and the second side 22 of the second electrical core 24 is electrically connected to the second electrical connection board 12 through the electrical elastic sheet 30; in the second electrical core assembly 42, the second side 22 of the second electrical core 24 is electrically connected to the first electrical connection board 11 through the electrical elastic sheet 30, and the first side 21 of the first electrical core 23 is electrically connected to the third electrical connection board 13 through the electrical elastic sheet 30.

In this way, the first and second cell assemblies 41 and 42 can be connected in series as a whole through the first electric connection plate 11, and then electric energy can be output as positive and negative electrodes with opposite polarities through the second and third electric connection plates 12 and 13.

In order to facilitate the installation of the electrical spring 30, in this embodiment, the first side 21 of each electrical core 20 is provided with a mounting groove 210, and the electrical spring 30 is disposed in the mounting groove 210; the first side 21 of one cell 20 of two adjacent cells 20 in each group of cell 20 assemblies is abutted against the electrical shrapnel 30 in the mounting groove 210 on the other cell 20; the first electric connection plate 11 is provided with a first accommodating groove 110, the second electric connection plate 12 is provided with a second accommodating groove 120, and the first accommodating groove 110 and the second accommodating groove 120 are respectively provided with an electric elastic sheet 30; in the first electrical core assembly 41, the electrical elastic sheet 30 in the mounting groove 210 on the first electrical core 23 is abutted against the first electrical connection board 11, and the second side 22 of the second electrical core 24 is abutted against the electrical elastic sheet 30 in the second accommodating groove 120; in the second cell assembly 42, the second side 22 of the second cell 24 abuts against the electrical spring plate 30 in the first accommodating groove 110, and the electrical spring plate 30 in the mounting groove 210 on the first cell 23 abuts against the third electrical connection plate 13.

When the battery cell module is assembled, the first electrical connection board 11 may be fixed first, then the electrical spring plate 30 is installed in the first accommodating groove 110, then the first battery cell assembly 41 and the second battery cell assembly 42 are assembled in sequence, and finally the second electrical connection board 12 and the third electrical connection board 13 are fixed.

The shape of the mounting groove 210 is not particularly limited, and may be a square groove or a dovetail groove.

It should be further understood that the electrical connection board 10 and the electrical core 20 may be provided with no mounting groove 210, the electrical spring 30 may be provided with a structure having a hole in the middle, and then a boss is provided on the second side 22 of the electrical core 20, and the electrical spring 30 is fixed on the boss, so that a pre-compression force is provided, and the contact resistance can be reduced better.

Of course, in some embodiments, the orientation of the first sides 21 of all of the cells 20 in the first cell assembly 41 is the same as the orientation of the first sides 21 of all of the cells 20 in the second cell assembly 42.

At this time, in the first electrical core assembly 41, the first side 21 of the first electrical core 23 is electrically connected to the first electrical connection board 11 through the electrical elastic sheet 30, and the second side 22 of the second electrical core 24 is electrically connected to the second electrical connection board 12 through the electrical elastic sheet 30; in the second electrical core assembly 42, the first side 21 of the first electrical core 23 is electrically connected to the first electrical connection board 11 through the electrical elastic sheet 30, and the second side 22 of the second electrical core 24 is electrically connected to the third electrical connection board 13 through the electrical elastic sheet 30.

In this way, the first electrical core assembly 41 and the second electrical core assembly 42 are juxtaposed as a whole by the first electrical connection board 11, the second electrical connection board 12 and the third electrical connection board 13 have the same polarity, and the polarities of the first electrical connection board 11 and the second electrical connection board 12 are opposite.

In addition, the embodiment also discloses an electricity utilization device which comprises the battery cell module.

Second embodiment

Referring to fig. 6 to 10, in the present embodiment, two electrodes with opposite polarities are disposed on the same side of each cell 20, and each electrode is abutted to one electrical connection board 10 through an electrical spring 30.

In order to facilitate the arrangement of the electrical spring 30, a third accommodating groove 14 is disposed on the electrical connection board 10, and the electrical spring 30 is disposed in the third accommodating groove 14.

The electrode of the electric core 20 may be a pole penetrating through the casing of the electric core 20 or a portion protruding from the casing of the electric core 20, however, the electrode is protruding with respect to the whole electric core 20, and the outer diameter of the electrode is larger than the inner diameter of the third accommodating groove 14, so when the electrode is pressed against the electric connecting plate 10, the electrode is not inserted into the third accommodating groove 14, but contacts with an area of the electric connecting plate 10 surrounding the third accommodating groove 14 except the electric spring plate 30 disposed in the third accommodating groove 14, for example, as shown in fig. 10, the middle portion is the position of the third accommodating groove 14 where the electric spring plate 30 is mounted, and is used as an electrical connection between the electric electrode and the electric spring plate 30, and a ring-shaped shadow area is disposed outside the third accommodating groove 14, which is the contact area between the electrode of the electric core 20 and the electric connecting plate 10, and is realized mainly through the thermal conduction between the electrode and the electric connecting plate 10, so that the electric connecting plate 20 and the electric connecting plate 10 can reliably dissipate heat.

Of course, in some embodiments, the outer diameter of the electrode may be smaller than the inner diameter of the third receiving groove 14, so that the electrode may be directly inserted into the third receiving groove 14.

In this embodiment, the battery cell module further includes a heat sink 60 and a pressing bar 50, where the heat sink 60 is abutted against one side of the electric connection board 10 far away from the battery cell 20; the pressing bar 50 is abutted against one side of the battery cell 20 away from the electric connection plate 10.

In this way, the battery cell 20 is pressed onto the electric connection plate 10 by the pressing strip 50, so that the electric connection between the battery cell 20 and the electric connection plate 10 is more reliable, and the conduction of heat is also more facilitated. By providing the heat sink 60 on the side of the electrical connection board 10 away from the battery cell 20, the heat of the battery cell 20 is transferred from the aluminum base to the heat sink 60 after being conducted to the aluminum base, so as to provide better heat dissipation through the heat sink 60.

When the cell module is assembled, the electric connection plate 10 and the radiator 60 can be fixed first, then the electric spring plates 30 are placed in each third accommodating groove 14 on the electric connection plate 10, then the cells 20 are reversely buckled to corresponding positions in sequence, so that the electrodes of each cell 20 are pressed against one electric spring plate 30, and finally the pressing bar 50 is used for pressing.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims

1. A battery cell module, comprising:

an electrical connection board (10);

the battery cell (20) and the electric elastic piece (30), at least one battery cell (20) is electrically connected to the electric connecting plate (10) and/or the battery cell (20) through the electric elastic piece (30), so that the battery cell (20) can conduct electricity outwards.

2. The cell module according to claim 1, wherein all the cells (20) are divided into at least one group of cell (20) assemblies, the cell (20) assemblies comprising at least two of the cells (20) arranged along a first direction;

in a group of electric core (20) subassemblies, two adjacent electric cores (20) are electrically connected through the electric elastic piece (30), and two electric cores (20) at the head end and the tail end are respectively electrically connected to one electric connecting plate (10) through the electric elastic piece (30).

3. The cell module according to claim 2, wherein each cell (20) has a first side (21) and a second side (22) on opposite sides of the first direction, the first side (21) and the second side (22) being opposite in polarity;

in two adjacent electric cores (20) of a group of electric core (20) assemblies, a first side (21) of one electric core (20) is electrically connected with a second side (22) of the other electric core (20) through the electric elastic sheet (30);

and one side, which is away from each other, of the two electric cores (20) positioned at the head end and the tail end of the electric core (20) assembly is electrically connected with one electric connecting plate (10) through the electric elastic piece (30).

4. A cell module according to claim 3, characterized in that two adjacent groups of said cell (20) assemblies are divided into a first cell assembly (41) and a second cell assembly (42); the orientation of the first sides (21) of all the cells (20) in the first cell assembly (41) is the same or opposite to the orientation of the first sides (21) of all the cells (20) in the second cell assembly (42);

the electric connection board (10) comprises a first electric connection board (11), a second electric connection board (12) and a third electric connection board (13);

the two electric cores (20) positioned at the head end and the tail end of the electric core (20) assembly are respectively a first electric core (23) and a second electric core (24); the first cell assembly (41) and the second cell assembly (42) are arranged in parallel;

in the first electric core assembly (41), a first side (21) of the first electric core (23) is electrically connected to the first electric connection plate (11) through the electric elastic sheet (30), and a second side (22) of the second electric core (24) is electrically connected to the second electric connection plate (12) through the electric elastic sheet (30);

in the second electric core assembly (42), a first side (21) of the first electric core (23) is electrically connected to the first electric connection board (11) through the electric elastic piece (30), and a second side (22) of the second electric core (24) is electrically connected to the third electric connection board (13) through the electric elastic piece (30); or alternatively, the first and second heat exchangers may be,

the second side (22) of the second electric core (24) is electrically connected to the first electric connection board (11) through the electric elastic sheet (30), and the first side (21) of the first electric core (23) is electrically connected to the third electric connection board (13) through the electric elastic sheet (30).

5. The cell module according to claim 4, wherein the orientation of the first sides (21) of all the cells (20) in the first cell assembly (41) is opposite to the orientation of the first sides (21) of all the cells (20) in the second cell assembly (42);

a first side (21) of each electric core (20) is provided with a mounting groove (210), and the mounting grooves (210) are internally provided with the electric elastic pieces (30);

the first side (21) of one cell (20) of two adjacent cells (20) in each group of cell (20) assemblies is abutted against the electrical shrapnel (30) in the mounting groove (210) on the other cell (20);

the first electric connection plate (11) is provided with a first accommodating groove (110), the second electric connection plate (12) is provided with a second accommodating groove (120), and the first accommodating groove (110) and the second accommodating groove (120) are internally provided with the electric elastic sheet (30);

in the first cell assembly (41), the electrical shrapnel (30) in the mounting groove (210) on the first cell (23) is abutted with the first electrical connection plate (11), and the second side (22) of the second cell (24) is abutted with the electrical shrapnel (30) in the second accommodating groove (120);

in the second cell assembly (42), a second side (22) of the second cell (24) abuts against the electrical elastic sheet (30) in the first accommodating groove (110), and the electrical elastic sheet (30) in the mounting groove (210) on the first cell (23) abuts against the third electrical connection plate (13).

6. The cell module according to claim 1, characterized in that the same side of each cell (20) is provided with two electrodes of opposite polarity, each of which is in abutment with one of the electrical connection plates (10) through the electrical spring (30).

7. The cell module according to claim 6, wherein the electrical connection board (10) is provided with a third accommodating groove (14), and the electrical spring sheet (30) is arranged in the third accommodating groove (14).

8. The cell module according to claim 7, wherein the electrodes are arranged in a protruding manner on the cells (20), and the outer diameter of the electrodes is larger than the inner diameter of the third accommodating groove (14), and the electrodes are also abutted against the electric connection plate (10) and surround the area outside the third accommodating groove (14);

or alternatively, the first and second heat exchangers may be,

the electrodes are arranged on the battery core (20) in a protruding mode, and the electrodes are inserted into the third accommodating groove (14).

9. The cell module according to claim 6, further comprising a heat sink (60) and/or a bead (50), the heat sink (60) being against a side of the electrical connection plate (10) remote from the cells (20); the pressing strip (50) is abutted to one side, far away from the electric connecting plate (10), of the electric core (20).

10. An electrical device comprising the cell module of any one of claims 1-9.