CN218299917U

CN218299917U - Battery cell module and power battery

Info

Publication number: CN218299917U
Application number: CN202221954309.0U
Authority: CN
Inventors: 黄伟才
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2022-07-27
Filing date: 2022-07-27
Publication date: 2023-01-13
Anticipated expiration: 2032-07-27

Abstract

The utility model belongs to the technical field of power battery, a electricity core module and power battery is disclosed. The battery cell module comprises a plurality of groups of battery cell assemblies and a plurality of liquid cooling assemblies, each group of battery cell assemblies comprises two rows of battery cell rows which are oppositely arranged, and each row of battery cell rows comprises a plurality of battery cells; in each group of the electric core assemblies, at least one side of each row of the electric core rows is provided with the liquid cooling assembly; the liquid cooling assembly comprises a liquid cooling plate and a current collector, and a liquid cooling channel is arranged in the liquid cooling plate; the head end and the tail end of the liquid cooling plate are both provided with current collectors, and communication channels communicated with the liquid cooling channels are arranged in the current collectors; it is a plurality of the mass flow body of liquid cold plate head end connects gradually, and is a plurality of the liquid cold plate tail end the mass flow body connects gradually to it is a plurality of the liquid cooling passageway is parallelly connected, wherein, two that are connected the at least linkage part of mass flow body can be followed upper and lower direction assembly and sealing connection. The operation is convenient when assembling the two current collectors, and the labor cost is low.

Description

Battery cell module and power battery

Technical Field

The utility model relates to a power battery technical field especially relates to an electricity core module and power battery.

Background

In the liquid cooling design process of the traditional cylindrical battery pack module, a nylon pipe is generally used for communicating adjacent liquid cooling plates to form a liquid cooling loop. In the design, the nylon tube is tightly sleeved on the current collector through the transverse extrusion of two adjacent liquid cooling plates, so that the operation difficulty is high during disassembly and assembly, the disassembly and assembly can be completed by the cooperative operation of more than two workers, and the labor cost is increased; and the size of the transverse extrusion force applied to the nylon tube is difficult to control, the nylon tube can be bent due to too large force, the liquid cooling plate can be deformed or even broken due to the jacking, and the nylon tube connection position can be sealed and failed due to too small force.

Therefore, a cell module and a power battery are needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electricity core module and power battery to there is the big, the poor problem of liquid cooling sealing reliability of the dismouting operation degree of difficulty in the current liquid cooling design of solution.

To achieve the purpose, the utility model adopts the following technical proposal:

a cell module, comprising:

each group of the electric core assemblies comprises two rows of electric core rows which are oppositely arranged, and each row of the electric core rows comprises a plurality of electric cores;

the liquid cooling assemblies are arranged on at least one side of each row of the battery cell rows in each group of the battery cell assemblies;

the liquid cooling assembly includes:

the liquid cooling plate is internally provided with a liquid cooling channel;

the current collectors are arranged at the head end and the tail end of the liquid cooling plate, and communication passages communicated with the liquid cooling passages are arranged in the current collectors;

it is a plurality of liquid cooling board head end the mass flow body connects gradually, and is a plurality of liquid cooling board tail end the mass flow body connects gradually to make a plurality of the liquid cooling passageway is parallelly connected, wherein, two that are connected the at least coupling part of the mass flow body can be followed upper and lower direction assembly and sealing connection.

As an alternative of the above electrical core module, in the plurality of liquid cooling plates, the current collector connected to the liquid cooling plate at one end in the arrangement direction of the plurality of liquid cooling plates is a first current collector, and the current collectors connected to the remaining liquid cooling plates are second current collectors;

the second current collector comprises an upper extension part, and the upper extension part can extend to the position adjacent to the current collector and is assembled and hermetically connected with the adjacent current collector along the up-down direction.

As an alternative of the above battery cell module, the first current collector and the second current collector each include:

the main body part is sleeved at the end part of the liquid cooling plate;

the lower supporting part is connected with the lower end of the main body part;

the upper extending part can be overlapped on the lower supporting part of the adjacent current collector, or the upper extending part can be in plug-in fit with the lower supporting part of the adjacent current collector along the up-down direction.

As an alternative to the above battery cell module, in the second current collector, the upper extending portion and the lower supporting portion are respectively located at two opposite sides of the main body portion.

As an alternative of the above battery cell module, a sealing ring is disposed between the upper extending portion and the lower supporting portion.

As an alternative of the above battery cell module, the two connected current collectors are connected by a fastening member, and the fastening member extends vertically.

As an alternative of the above-mentioned battery cell module, the battery cell module further includes an adaptor and a connecting pipe, and is a plurality of in the liquid cooling board, one the mass flow body and one that the liquid cooling board head end is connected all be provided with on the mass flow body the adaptor, the adaptor stack in on the mass flow body, be used for the intercommunication the mass flow body with the connecting pipe.

As an alternative scheme of the battery cell module, a connector is arranged on the adaptor, the connecting pipe sleeve is arranged outside the connector, a clamp is sleeved on the connecting pipe, and the clamp is used for clamping the connecting pipe to the connector.

As an alternative of the above battery cell module, the battery cell module further comprises a tray and a heat-conducting adhesive layer, wherein the plurality of battery cell assemblies are arranged on the tray, and the heat-conducting adhesive layer is arranged on the tray and filled between the adjacent battery cells and between the battery cells and gaps between the trays.

A power battery comprises the battery cell module.

The utility model has the advantages that:

the utility model provides an among the electric core module, the at least coupling part of two mass flow bodys that link to each other can be followed the upper and lower direction assembly, operating personnel when assembling two mass flow bodys from top to bottom place the mass flow body can, compare the nylon tube operation degree of difficulty of following the horizontal direction atress extrusion low, do not need operating personnel more than two to accomplish in coordination, the cost of labor is low, does not have the problem that the liquid cooling board is out of shape or is broken of control lateral extrusion dynamics.

The utility model provides a power battery adopts above-mentioned electric core module, and the liquid cooling structure is reliable, easy dismounting, and be difficult to the leakage.

Drawings

Fig. 1 is an exploded view of a cell module provided by the present invention;

fig. 2 is a schematic structural diagram of a battery cell module provided by the present invention;

fig. 3 is a top view of a battery cell module provided by the present invention;

fig. 4 is a schematic structural view of adjacent liquid cooling assemblies provided by the present invention;

fig. 5 is a cross-sectional view of a current collector connection location provided by the present invention;

fig. 6 is a cross-sectional view of a first current collector provided by the present invention.

In the figure:

10. a tray; 20. a heat-conducting adhesive layer; 30. a battery cell assembly; 31. arranging battery cores; 32. an electric core; 40. a liquid cooling assembly; 41. a liquid-cooled plate; 42. a current collector; 421. a first current collector; 422. a second current collector; 4221. a main body portion; 4222. a lower support section; 4223. an upper extension; 43. a seal ring; 51. a connection pipe 51; 52. an adaptor; 60. a bolt; 70. and (5) clamping the hoop.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected", "connected" and "fixed" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplification of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The embodiment provides a cell module, as shown in fig. 1 to fig. 3, the cell module includes a tray 10, a plurality of groups of cell assemblies 30, and a thermal adhesive layer 20. Wherein, the plurality of groups of electric core assemblies 30 and the thermal conductive adhesive layer 20 are disposed on the tray 10. Each group of the cell assemblies 30 includes two rows of the cell rows 31, and each of the cell rows 31 includes the cells 32 arranged in a straight line along the X direction. The heat conductive adhesive layer 20 is filled in gaps between adjacent battery cells 32 and between the battery cells 32 and the tray 10, so as to dissipate heat of the battery cells 32, and fix a plurality of battery cells 32 on the tray 10 to form a modular structure.

For further improvement to the radiating effect of electric core 32, the electric core module still includes the liquid cooling structure. The liquid cooling structure includes a plurality of liquid cooling subassemblies 40, and at least one side of every row of electricity core row 31 is provided with liquid cooling subassembly 40, has mobile cooling liquid in the liquid cooling subassembly 40, through the heat-conduction of liquid cooling subassembly 40 with electric core 32, makes cooling liquid absorb the heat that electric core 32 produced to along with the flow of cooling liquid with heat discharge, with the temperature that reduces electric core 32.

Specifically, the liquid cooling assembly 40 includes a liquid cooling plate 41 and a current collector 40 disposed at both ends of the liquid cooling plate 41. A liquid cooling channel is arranged in the liquid cooling plate 41, and the liquid cooling plate 41 is located between two adjacent rows of battery cell rows 31 and is respectively contacted with the battery cells 32 on two adjacent sides, so that heat conduction is realized through contact with the battery cells 32. A communication passage is arranged in the current collector 42 and is communicated with the liquid cooling passage. In a plurality of liquid cooling boards 41, the mass flow body 42 of liquid cooling board 41 head end connects gradually, and the mass flow body 42 of liquid cooling board 41 tail end connects gradually to make a plurality of liquid cooling boards 41 form parallel structure through the mass flow body 42, thereby make a plurality of liquid cooling passageways parallelly connected, make cooling liquid can flow through a plurality of liquid cooling boards 41, in order to provide the radiating effect to every electric core 11.

Wherein at least the connection portion connecting the two current collectors 42 can be assembled and hermetically connected in the up-down direction to prevent the cooling liquid from leaking outside.

Compare fix the nylon tube on mass flow body 42 through two liquid cooling board 41 lateral extrusions among the prior art, in this embodiment, two mass flow bodies 42 that are connected can be placed on tray 10, support through tray 10, are difficult to the pine and take off, can avoid the sealed inefficacy of liquid cooling.

In addition, the assembly of the upper and lower direction is followed to two at least coupling parts that collect fluid 42 that are connected, operating personnel when assembling two collection fluid 42 from top to bottom place the collection fluid 42 can, it is low to compare the nylon tube operation degree of difficulty along horizontal direction atress extrusion, does not need operating personnel more than two to accomplish in coordination, and the cost of labor is low, does not have the problem that the liquid cold plate 41 of control transverse extrusion dynamics was avoided warping or is broken.

After the plurality of liquid cooling plates 41 are connected in parallel, the cooling liquid can be introduced from one end of the liquid cooling plates 41, and is discharged from the other end of the liquid cooling plate 42 after being shunted by the plurality of liquid cooling plates 41. It should be noted here that the leading end of the liquid cooling plate 41 is the end for introducing the cooling liquid, and the trailing end of the liquid cooling plate 42 is the end for discharging the cooling liquid.

In this embodiment, each group of electric core assemblies 30 is correspondingly provided with one liquid cooling assembly 40, and the liquid cooling assembly 40 is arranged between two electric core rows 31 in the corresponding electric core assemblies 30. This kind of setting can be on guaranteeing that every electric core row 31 all corresponds liquid cooling subassembly 40 and carries out the refrigerated basis, reduces the quantity of liquid cooling subassembly 40 to reduce cost reduces the size of electric core module.

As shown in fig. 2 and fig. 3, in the present embodiment, six sets of battery core assemblies 30 are provided, and twelve rows of battery cell rows 31 are provided, where a plurality of battery cells 32 in each battery cell row 31 are arranged along the X direction, and multiple rows of battery cell rows 31 are arranged along the Y direction. The liquid cooling assemblies 40 are six in number, so that each group of electric core assemblies 30 corresponds to one liquid cooling assembly 40.

For convenience of understanding, the six liquid cooling assemblies 40 are arranged in the Y direction, the liquid cooling assembly 40 located at the top in fig. 3 is the first liquid cooling assembly, the corresponding liquid cooling plate 41 is the first liquid cooling plate, and so on.

In this embodiment, the battery cell module further includes a connection pipe 51 and an adapter 52. The current collectors 42 connected to the head and the tail of the sixth liquid cooling plate are provided with adapters 52, and the adapters 52 are used for communicating a communication channel in the current collectors with the connecting pipe 51. Specifically, the cooling liquid is introduced through the connection pipe 51 communicated with the first liquid cooling plate on the right side in fig. 3, and is distributed into the six liquid cooling plates 41 after passing through the plurality of current collectors 42 on the right side, and is discharged through the connection pipe 51 communicated with the first liquid cooling plate on the right side after being converged by the plurality of current collectors 42 on the left side of the liquid cooling plates 41.

As shown in fig. 3 and fig. 4, in order to enable the liquid cooling plate 41 to contact the electric cores 32 on both sides respectively and increase the contact area to improve the heat dissipation effect, the electric cores 32 in two adjacent rows of electric core rows 31 are arranged in a staggered manner, and the liquid cooling plate 41 is a wave-shaped plate, and each electric core 32 corresponding to both sides thereof is provided with a recessed structure to wrap part of the circumferential side surface of each electric core 32.

In this embodiment, the battery cell 32 is cylindrical, and the concave structure on the liquid cooling plate 41 is an arc-shaped groove, so that the inner wall of the arc-shaped groove is attached to the circumferential side wall of the cylindrical battery cell 32. Through the staggered arrangement of two adjacent rows of battery cores 32 to match with the corrugated liquid cooling plates 41, the contact area between the liquid cooling plates 41 and each battery core 32 can be increased, thereby improving the heat dissipation effect.

To facilitate the connection of the two current collectors 42, as shown in fig. 2, the current collector 42 includes two structures, a first current collector 421 and a second current collector 422. In fig. 3, the uppermost current collector 42 is the first current collector 421, and all the remaining current collectors 42 are the second current collectors 422. The second current collector 422 includes an upper extension portion 4223 extending in the Y direction, and the upper extension portion 4223 may extend to an adjacent second current collector 422 or first current collector 421, and overlap and be hermetically connected to an adjacent current collector 42 in the up-down direction. The extension portion 4223 can pass through a gap between two current collectors 422 due to the placement of the battery core 32, so as to facilitate the connection between two adjacent current collectors 42.

As shown in fig. 5, the first and second

current collectors

421 and 422 include a body portion 4221 and a lower support portion 4222. The main body 4221 can be sleeved on the end of the liquid cooling plate 41, and the lower support 4222 is connected with the lower end of the main body 4221 and extends from one side of the main body 4221 along the Y direction. The upper extension parts 4223 of adjacent current collectors 42 are overlapped on the lower support part 4222 of another current collector 42, and the connected upper extension parts 4223 and the lower support parts 4222 are stacked up and down and communicated with each other, so that the current collectors are placed and disassembled and assembled by utilizing the space between the two liquid cooling plates 41 along the vertical direction, and the operation difficulty is reduced.

In addition, the gravity of the upper extension portion 4223 can provide a pretightening force for the contact surface between the upper extension portion 4223 and the lower support portion 4222, so that the stability of the sealing connection between the upper extension portion 4223 and the lower support portion 4222 is improved, and the leakage of the liquid cooling structure is avoided.

The adapter 52 is disposed on the lower support portion 4222 of the second current collector 422 at the end portion, so as to provide sealing pre-tightening force between the adapter 52 and the lower support portion 4222 by using the gravity of the adapter 52.

In this embodiment, the bottom end of the second current collector 422 is placed on the tray 10, and the upper extension portion 4223 on the second current collector 422 is overlapped on another current collector 42, so that the second current collector 422 can be placed more stably, which is beneficial to ensuring the stability of the two connected current collectors 42 when being connected, thereby avoiding the leakage of the cooling liquid.

As shown in fig. 6, the first current collector 421 includes a main body portion 4221 and a lower support portion 4222, which are different from the second current collector 422 in that: the upper extension 4223 need not be provided. The bottom end of the first current collector 421 is placed on the tray 10, and can be stably supported by the tray 10.

To facilitate communication between adjacent current collectors 42, between the current collector 42 and the liquid-cooled plate 41, and between the current collector 42 and the adaptor 52, the communication passage includes a first communication section located in the main body portion 4221 and a second communication section located in the lower support portion 4222, and the second communication section is communicated with the first communication section. The main body part is sleeved at the end part of the corresponding liquid cooling plate 41, the first communication section is communicated with a liquid cooling channel in the liquid cooling plate 41, and the second communication section extends to the top end face of the lower supporting part 4222, so that the upper extension section 4223 or the adaptor 52 is communicated with the inside.

Further, the size and the cross sectional shape of the first communicating section in the vertical direction can be matched with the size and the cross sectional size of the liquid cooling channel in the liquid cooling plate 41 in the vertical direction, so that cooling liquid in the liquid cooling plate 41 can conveniently enter the current collector quickly, and the heat dissipation effect is improved.

The communication channel in the second current collector 422 further comprises a third communication section located in the upper extension part, the third communication section is communicated with the first communication section, and the third communication section extends to the bottom end surface of the upper extension part 4223 so as to be communicated with the second communication section. Alternatively, the main body 4221 may be a flat sleeve structure adapted to the shape and size of the liquid cooling plate 41, so as to reduce the space occupied by the main body 4221.

Alternatively, the main body 4221 and the liquid cooling plate 41 may be fixed by welding to achieve sealing and fixing effects.

Optionally, the flow areas of the second communicating section and the second communicating section may be larger than the communication area of the first communicating section, so that the fluid flows faster in the liquid cooling plate 41, which is beneficial to improving the heat dissipation capability.

In order to further improve the sealing performance of the liquid cooling structure, a sealing ring 43 is disposed between the upper extension portion 4223 and the lower support portion 4222 connected to each other to prevent the cooling liquid from leaking. In this embodiment, lower support portion 4222's top surface is provided with the constant head tank, and in partial sealing washer 43 embedding constant head tank for sealing washer 43 fixes a position, avoids leading to sealed bad because of sealing washer 43 removes.

In some embodiments, the positioning groove may also be disposed on the upper extension portion 4223, or the positioning groove is defined between the upper extension portion 4223 and the lower support portion 4222, which may improve the positioning effect of the sealing ring 43.

Similarly, the seal ring 43 may be provided between the adaptor 52 and the lower support portion 4222 of the first current collector 421.

In order to enable the cooling flow passages in the plurality of liquid-cooled plates 41 to be connected in parallel via the current collector 42, the upper extension portions 4223 and the lower extension portions 4222 on the second current collector 422 extend in opposite directions. Taking the direction shown in fig. 3 as an example, the upper extension portion 4223 on the second current collector 422 extends in the positive Y-direction, and the lower extension portion 4222 on the second current collector 422 extends in the negative Y-direction.

In some embodiments, the upper extension portion 4223 of one current collector of the two connected current collectors can be inserted into the lower support portion 4222 of the other current collector in the up-down direction, and the upper extension portion 4223 and the lower support portion are matched with each other in an inserting manner, so that the difficulty of assembling and disassembling of an operator can also be reduced.

Further, the two current collectors 42 that are connected may be removably connected to facilitate individual replacement of a damaged current collector 42. Compare the scheme that adopts the nylon tube among the prior art, the connection part that links to each other two mass flow collectors 42 in this embodiment is along upper and lower direction superpose, can follow vertical direction and dismantle or install, and convenient operation can reduce the maintenance cost.

In this embodiment, the two current collectors 42 that are connected by a fastener 60, and the fastener 60 extends vertically. The fastener 60 provides a locking force in a vertical direction, and can further improve a sealing effect between the upper extension 4223 and the lower support 4222. Wherein, fastener 60 can be the bolt, and is with low costs through bolted connection, and easy dismounting.

Optionally, the adaptor 52 and the lower support portion 4222 may be fixed by bolts, so as to reduce cost, facilitate assembly and disassembly, and improve sealing effect.

Optionally, a joint is disposed on the adaptor 52, the connecting pipe 51 is sleeved outside the joint, the connecting pipe 51 is sleeved with a clamp 70, and the clamp 70 is used for clamping the connecting pipe 51 to the joint to prevent the connecting pipe 51 from being separated from the adaptor 52.

In the assembling process of the battery cell module provided in this embodiment, a plurality of rows of battery cell rows 31 may be placed on the tray 10 first; the plurality of liquid cooling plates 41 are attached, the first current collector 421 is connected to the corresponding liquid cooling plate 41, and the seal ring 43 is attached to the lower support portion 4222 of the first current collector 421. The plurality of second current collectors 422 are sequentially mounted, and the mounted second current collectors 422 are connected to the adjacent first current collector 421 or second current collector 422.

Then, the adaptor 52 and the connection tube 51 are attached, and the connection tube 51 and the adaptor 52 are fixed by the clip 70.

Finally, heat-conducting structural adhesive is poured into the tray 10, and a heat-conducting adhesive layer 20 is formed after the heat-conducting structural adhesive is solidified, so that the sealing and heat-conducting effects are achieved on the basis of fixing the battery core 32, the tray 10 and the liquid cooling assembly 40.

This embodiment still provides a power battery, including foretell electricity core module.

It is to be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements, and substitutions will now occur to those skilled in the art without departing from the scope of the invention. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a battery cell module which characterized in that includes:

the battery comprises a plurality of groups of battery core assemblies (30), wherein each group of battery core assembly (30) comprises two rows of battery core rows (31) which are oppositely arranged, and each row of battery core row (31) comprises a plurality of battery cores (32);

a plurality of liquid cooling assemblies (40), wherein in each group of the electric core assemblies (30), at least one side of each row of the electric core rows (31) is provided with the liquid cooling assemblies (40);

the liquid cooling assembly (40) includes:

a liquid cooling plate (41) in which a liquid cooling passage is provided;

the current collectors (42) are arranged at the head end and the tail end of the liquid cooling plate (41), and communication channels communicated with the liquid cooling channels are arranged in the current collectors (42);

a plurality of liquid cooling board (41) head end the mass flow body (42) connect gradually, and is a plurality of liquid cooling board (41) tail end the mass flow body (42) connect gradually to make it is a plurality of the liquid cooling passageway is parallelly connected, wherein, two that are connected the at least linkage part of the mass flow body (42) can be along upper and lower direction assembly and sealing connection.

2. The cell module according to claim 1, wherein, among the plurality of liquid-cooled plates (41), the current collector (42) connected to the liquid-cooled plate (41) at one end in the arrangement direction of the plurality of liquid-cooled plates (41) is a first current collector (421), and the current collectors (42) connected to the remaining liquid-cooled plates (41) are second current collectors (422);

the second current collector (422) comprises an upper extension part (4223), and the upper extension part (4223) can extend to the position adjacent to the current collector (42) and is assembled and hermetically connected with the adjacent current collector (42) along the up-down direction.

3. The cell module of claim 2, wherein the first current collector (421) and the second current collector (422) each comprise:

a main body part (4221), wherein the main body part (4221) is sleeved on the end part of the liquid cooling plate (41);

a lower support part (4222) to which the lower end of the main body part (4221) is connected;

the upper extension part (4223) can be superposed on the lower support part (4222) of the adjacent current collector (42), or the upper extension part (4223) can be in plug fit with the lower support part (4222) of the adjacent current collector (42) along the up-down direction.

4. The cell module of claim 3, wherein the upper extension portion (4223) and the lower support portion (4222) of the second current collector (422) are located on opposite sides of the main body portion (4221).

5. The battery cell module of claim 3, wherein a sealing ring (43) is arranged between the connected upper extension portion (4223) and the lower support portion (4222).

6. The cell module according to any of claims 1-5, wherein the two current collectors (42) that are connected by a fastener (60), the fastener (60) extending vertically.

7. The cell module according to any of claims 1 to 5, further comprising an adaptor (52) and a connecting pipe (51), wherein the adaptor (52) is disposed on each of the current collector (42) connected to the head end of one of the liquid cooling plates (41) and the current collector (42) connected to the tail end of one of the liquid cooling plates (41), and the adaptor (52) is stacked on the current collector (42) for communicating the current collector (42) and the connecting pipe (51).

8. The battery cell module of claim 7, wherein the adaptor (52) is provided with a joint, the connecting pipe (51) is sleeved outside the joint, the connecting pipe (51) is sleeved with a clamp (70), and the clamp (70) is used for clamping the connecting pipe (51) to the joint.

9. The cell module according to any of claims 1-5, further comprising a tray (10) and a thermal adhesive layer (20), wherein multiple groups of the cell assemblies (30) are disposed on the tray (10), and the thermal adhesive layer (20) is disposed on the tray (10) and fills gaps between adjacent cells (32) and gaps between the cells (32) and the tray (10).

10. A power battery, characterized by comprising the cell module of any one of claims 1-9.