Battery module and battery pack

Abstract

The invention provides a battery module and a battery pack, and belongs to the technical field of power batteries. The battery module comprises at least two battery cell units which are arranged in parallel in a first direction, a connecting part and a liquid cooling plate, and each battery cell unit comprises at least two rows of multiple single batteries which are arranged in parallel in the second direction. The connecting part is positioned between the two battery cell units in the first direction, and the connecting part is used for connecting at least part of the outer surface of each single battery. The liquid cooling plate is located between the two rows of single batteries in the third direction and is used for being in contact with the single batteries for heat dissipation. The first direction, the second direction and the third direction are perpendicular to one another. Therefore, the battery cell units are fixedly connected through the connecting parts, so that the structure of the battery module is simplified, and the grouping efficiency of the battery module is improved. In addition, the liquid cooling plates can be directly contacted with one ends of the single batteries, so that the number of the liquid cooling plates is obviously reduced, and the cost of the battery module is further reduced.

Description

Technical Field

[0001] The present application relates to the technical field of power batteries, and in particular to a battery module and a battery pack. Background Art

[0002] With the advancement of technology and the increasing demand for renewable energy, the field of new energy vehicles has developed rapidly. Among them, power batteries, as the main core components of new energy vehicles, are of great importance to new energy vehicles.

[0003] Among them, the battery pack in new energy vehicles is mainly composed of multiple battery module clusters. The battery module can be an independent packaged individual, and the battery module is assembled to form a battery pack. The battery module can include several single cells. Taking cylindrical cells as an example, due to the standardization of size and shape, cylindrical cells are easy to mass produce and apply.

[0004] However, in existing battery modules, cylindrical cells usually need to be positioned and grouped by combining a plastic base and a plastic bracket, and then fixed by standard parts such as bolts and rivets. The plastic base and the plastic bracket need to be molded, which has the characteristics of high development costs and difficulty in modification and adjustment. In addition, the plastic base and the plastic bracket occupy a large space and have low grouping efficiency. Summary of the invention

[0005] The embodiments of the present application provide a battery module and a battery pack. The battery cells are fixedly connected through a connecting portion, which simplifies the structure of the battery module and improves the grouping efficiency of the battery module. In addition, the liquid cooling plate can directly contact one end of the single battery, which significantly reduces the number of liquid cooling plates and thus reduces the cost of the battery module.

[0006] The first aspect of the present application provides a battery module, comprising:

[0007] At least two battery cell units arranged in parallel in a first direction, each battery cell unit comprising at least two rows of a plurality of single batteries arranged in parallel in a second direction;

[0008] A connecting portion, the connecting portion is located between the two battery cells in a first direction, and the connecting portion is used to connect at least a portion of the outer surface of each single battery;

[0009] A liquid cooling plate, the liquid cooling plate is located between two rows of single cells in the third direction, and the liquid cooling plate is used for contacting with the single cells to dissipate heat;

[0010] The first direction, the second direction and the third direction are arranged perpendicular to each other.

[0011] The battery module provided in the first aspect of the embodiment of the present application includes at least two battery cell units arranged in parallel in a first direction, a connecting portion and a liquid cooling plate. Each battery cell unit includes at least two rows of multiple single cells arranged in parallel in a second direction. The connecting portion is located between the two battery cell units in the first direction, and the connecting portion is used to connect at least part of the outer surface of each single cell. The liquid cooling plate is located between the two rows of single cells in the third direction, and the liquid cooling plate is used to contact and dissipate heat with the single cell. The first direction, the second direction and the third direction are arranged perpendicular to each other. In this way, the battery cell units are fixedly connected by the connecting portion, which simplifies the structure of the battery module and improves the grouping efficiency of the battery module. In addition, the liquid cooling plate can directly contact one end of the single cell, which significantly reduces the number of liquid cooling plates and thus reduces the cost of the battery module.

[0012] In a possible implementation, each single cell has a first end and a second end, the second ends of the two columns of single cells are arranged opposite to each other, and the liquid cooling plate is located between the second ends of the two columns of single cells.

[0013] In a possible implementation, the connecting portion includes a flat plate, a glue layer, and a glue blocking strip;

[0014] The adhesive layer is located on the side of the flat plate facing the battery cell unit, the adhesive strip is sleeved on the outer peripheral side of the flat plate, one side of the adhesive layer is bonded to the flat plate, and the other side of the adhesive layer is bonded to at least part of the outer surface of the single battery.

[0015] In a possible implementation, the adhesive layer has a plurality of grooves on one side facing the battery cell, and the grooves are matched with at least a portion of the outer surface of the single battery, so that the adhesive layer is connected to the single battery through the grooves.

[0016] In a possible implementation, it further includes: a pole piece;

[0017] The pole piece is located at the first end of the single cell, and the pole piece and the single cell are electrically connected.

[0018] In a possible implementation, the further comprising: a flexible circuit board, the flexible circuit board having a first part and a second part, the first part and the second part being arranged vertically;

[0019] The first part is fixedly connected to the pole piece, and the second part is fixedly connected to at least a part of the outer surface of the single cell.

[0020] In a possible implementation, the battery further includes: a battery management system, the battery management system being located at one end of the battery cell unit in the second direction;

[0021] The battery management system is provided with a plug-in terminal, and one end of the flexible circuit board facing the battery management system has a plug-in portion, which is inserted into the plug-in terminal to electrically connect the flexible circuit board and the battery management system.

[0022] In a possible implementation, the invention further includes: a protective plate, the protective plate being located on a side of the electrode sheet facing away from the single battery;

[0023] The protection plate and the pole piece are fixedly connected.

[0024] In a possible implementation, the flexible circuit board further includes: foam, the foam is located on a side of the second portion of the flexible circuit board facing away from the single battery;

[0025] The foam and the flexible circuit board are fixedly connected.

[0026] A second aspect of the present application provides a battery pack, comprising: the above-mentioned battery module.

[0027] It should be understood that the second aspect of the present application corresponds to the technical solution of the first aspect of the present application, and the beneficial effects achieved by each aspect and the corresponding feasible implementation methods are similar and will not be repeated here.

[0028] In addition to the technical problems solved by the present application, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by a battery module and a battery pack provided by the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments of the present application or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only part of the embodiments of the present application. These drawings and text descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application for those skilled in the art by referring to specific embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of the structure of a battery module provided in an embodiment of the present application;

[0031] Figure 2 An exploded schematic diagram of a battery module provided in an embodiment of the present application;

[0032] Figure 3 An exploded schematic diagram of a connection portion in a battery module provided in an embodiment of the present application;

[0033] Figure 4 A schematic diagram of the structure of a flexible circuit board in a battery module provided in an embodiment of the present application.

[0034] Description of reference numerals:

[0035] 100-battery module;

[0036] 200 - battery cell; 210 - single battery; 211 - first end; 212 - second end;

[0037] 300-connecting part; 310-flat plate; 320-glue layer; 321-groove; 330-glue strip; 340-gap;

[0038] 400-Liquid cooling plate;

[0039] 500-pole piece; 510-bending portion;

[0040] 600- flexible circuit board; 610- first part; 620- second part; 630- plug-in part;

[0041] 700-battery management system; 710-plug terminal;

[0042] 800-protective plate;

[0043] 900-Foam. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] As described in the background technology, in existing battery modules, cylindrical cells usually need to be positioned and grouped by combining a plastic base and a plastic bracket, and then fixed by standard parts such as bolts and rivets. The plastic base and the plastic bracket need to be molded, which has the characteristics of high development costs and difficulty in modification and adjustment. In addition, the plastic base and the plastic bracket occupy a large space and have low grouping efficiency.

[0046] In view of the above technical problems, the first aspect of the embodiment of the present application provides a battery module. The battery module includes at least two battery cell units arranged in parallel in a first direction, a connecting portion and a liquid cooling plate. Each battery cell unit includes at least two rows of multiple single cells arranged in parallel in a second direction. The connecting portion is located between the two battery cell units in the first direction, and the connecting portion is used to connect at least part of the outer surface of each single cell. The liquid cooling plate is located between the two rows of single cells in the third direction, and the liquid cooling plate is used to contact with the single cell to dissipate heat. The first direction, the second direction and the third direction are arranged perpendicular to each other. In this way, the battery cell units are fixedly connected by the connecting portion, which simplifies the structure of the battery module and improves the grouping efficiency of the battery module. In addition, the liquid cooling plate can directly contact one end of the single cell, which significantly reduces the number of liquid cooling plates and thus reduces the cost of the battery module.

[0047] A second aspect of the embodiments of the present application provides a battery pack, which includes the above-mentioned battery module.

[0048] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0049] The embodiments of the present application provide a battery module and a battery pack. The battery cells are fixedly connected by a connecting portion, which simplifies the structure of the battery module and improves the grouping efficiency of the battery module. In addition, the liquid cooling plate can directly contact one end of the single battery, which significantly reduces the number of liquid cooling plates and thus reduces the cost of the battery module. The specific structure of a battery module and a battery pack provided in the embodiments of the present application is introduced below in conjunction with the accompanying drawings.

[0050] refer to Figure 1 In a first aspect, the present application embodiment provides a battery module 100. The battery module 100 may include a battery cell unit 200, a connecting portion 300 and a liquid cooling plate 400. In a possible implementation, Figure 2 As shown, the number of the battery cell units 200 may be at least two, which is not limited in the present embodiment. In the present embodiment, the number of the battery cell units 200 is two for example. The two battery cell units 200 may be arranged in parallel in the first direction.

[0051] Continue to refer Figure 2On the basis of the above embodiment, further, each battery cell unit 200 may include a single battery cell 210. In one possible implementation, the number of single batteries 210 may be several, and each battery cell unit 200 may include at least two columns of single batteries 210, which is not limited in the embodiment of the present application. In the embodiment of the present application, it is taken as an example that each battery cell unit 200 includes two columns of single batteries 210. Several single batteries 210 in each column of single batteries 210 may be arranged in parallel in the second direction. And two columns of single batteries 210 may be arranged in parallel in the third direction to form a battery cell unit 200.

[0052] It is understandable that in a possible implementation, the single battery 210 may be a cylindrical battery, which is not limited in the present embodiment. In the present embodiment, a cylindrical battery is used as an example.

[0053] Continue to refer Figure 2 , based on the above embodiment, in the first direction, the connection portion 300 can be located between two battery cells 200. It can be understood that the connection portion 300 can be used to connect two battery cells 200, so that the two battery cells 200 are fixed into a group to form a whole battery module. In a possible implementation, further, the connection portion 300 can be used to connect at least part of the outer surface of each single battery 210, so that the connection portion 300 can be fixedly connected to each single battery 210.

[0054] Continue to refer Figure 2 Based on the above embodiment, in one possible implementation, the number of the connecting parts 300 may be two, which is not limited in the present embodiment. In the present embodiment, the connecting parts 300 may be arranged in parallel in the third direction, and each connecting part 300 may correspond to each column of single battery cells 210.

[0055] Continue to refer Figure 1 as well as Figure 2 , based on the above embodiment, in the third direction, the liquid cooling plate 400 can be located between two columns of single cells 210. It can be understood that the liquid cooling plate 400 can be used to contact the single cells 210 to achieve the purpose of heat dissipation. As shown in the figure, it can be seen that the two connecting parts 300 can directly have a gap 340, and the gap 340 can allow the liquid cooling plate 400 to be penetrated. In this way, one end of the liquid cooling plate 400 can be penetrated in the gap 340 of the two connecting parts 300, and then located between the two columns of single cells 210 of one of the battery cells 200. Correspondingly, the other end of the liquid cooling plate 400 can be located between the two columns of single cells 210 of another battery cell unit 200, thereby dissipating heat for the entire battery module 100.

[0056] It should be noted that, for the convenience of description, the first direction may be the height direction of the battery module 100, such as Figure 1 The second direction may be the length direction of the battery module 100, such as Figure 1 The third direction may be the width direction of the battery module 100, such as Figure 1 It can be understood that the first direction, the second direction and the third direction can be arranged perpendicular to each other.

[0057] Continue to refer Figure 2 , based on the above embodiment, in one possible implementation, each single cell 210 may have a first end 211 and a second end 212 in the third direction. In the embodiment of the present application, the second ends 212 of the two columns of single cells 210 may be arranged opposite to each other, and the first ends 211 of the two columns of single cells 210 may be arranged opposite to each other. It is understood that the liquid cooling plate 400 may be located between the second ends 212 of the two columns of single cells 210.

[0058] Based on the above embodiment, in one possible implementation, the first end 211 of the single battery 210 may be the top end, and the second end 212 of the single battery 210 may be the bottom end. In the embodiment of the present application, the liquid cooling plate 400 may contact the bottom end of the single battery 210 .

[0059] It is understandable that the liquid cooling plate 400 can be fixedly connected to the second end 212 of the single battery 210 through a heat-conducting structural adhesive, so that the liquid cooling plate 400 and the single battery 210 are in direct contact. In this way, the number of liquid cooling plates 400 can be significantly reduced. In addition, compared with the heat dissipation method of the serpentine cold plate in the related art, the cooling method provided by the embodiment of the present application is simpler and improves the characteristic that the serpentine cold plate is difficult to install.

[0060] refer to Figure 3On the basis of the above embodiment, further, each connecting portion 300 may include a flat plate 310, a glue layer 320 and a rubber strip 330, and the flat plate 310, the glue layer 320 and the rubber strip 330 may be stacked in the first direction. In a possible embodiment, the number of flat plates 310 may be one, the number of glue layers 320 may be two, and the number of rubber strips 330 may also be two. The embodiment of the present application does not limit the number of flat plates 310, glue layers 320 and rubber strips 330. Among them, the two glue layers 320 may be respectively located on both sides of the flat plate 310 in the first direction, so that the two sides of the flat plate 310 are respectively bonded and connected to the two glue layers 320. In addition, the rubber strip 330 may be sleeved on the outer peripheral side of the glue layer 320, and each rubber strip 330 corresponds to each glue layer 320. In this way, the glue layer 320 may be located on the side of the flat plate 310 facing the battery cell unit 200. It is understandable that one side of the adhesive layer 320 may be bonded and connected to the flat plate 310 , while the other side of the adhesive layer 320 may be bonded and connected to at least a portion of the outer surface of the single battery 210 .

[0061] Continue to refer Figure 3 On the basis of the above embodiment, the adhesive layer 320 may have a groove 321 on the side facing the battery cell 200. In one possible implementation, the number of grooves 321 may be multiple, and the number of grooves 321 may be the same as the number of single cells 210, which is not limited in the embodiment of the present application. In the embodiment of the present application, the groove 321 is adapted to at least part of the outer surface of the single cell 210, so that the adhesive layer 320 can be bonded and connected to the single cell 210 through the groove 321.

[0062] Continue to refer Figure 3 On the basis of the above embodiments, in one possible implementation, when the single cell 210 is a cylindrical battery, the groove 321 can be opened as an arc-shaped groove 321, and the arc shape of the groove 321 can be adapted to the outer surface of the cylindrical single cell 210, so that the bonding area between the glue layer 320 and the single cell 210 is larger, thereby making the fixation between the single cell 210 and the connecting part 300 more stable.

[0063] Continue to refer Figure 2On the basis of the above embodiment, the battery module 100 may further include: a pole piece 500. The pole piece 500 may be located at the first end 211 of the single cell 210, and the pole piece 500 may be electrically connected to the single cell 210. In a possible implementation, the number of pole pieces 500 may be several, which is not limited in the embodiment of the present application. In the embodiment of the present application, several pole pieces 500 may be connected in pairs in the second direction to form two columns of pole pieces 500, and each column of pole pieces 500 corresponds to each column of single cells 210, and each pole piece 500 is electrically connected to the first end 211 of each single cell 210. It can be understood that the two columns of pole pieces 500 can be connected in the first direction through the bending portion 510, so that the two columns of pole pieces 500 form a pole piece 500 of a U-shaped structure, which is convenient for the connection of the single cell 210.

[0064] On the basis of the above embodiments, in one possible implementation, the pole piece 500 can be fixedly connected to the single battery 210 by welding, and the pole piece 500 can be an aluminum pole piece, which is not limited in the embodiments of the present application.

[0065] refer to Figure 2 as well as Figure 4 On the basis of the above embodiment, the battery module 100 may further include: a flexible circuit board 600. In one possible implementation, the flexible circuit board 600 may have a first portion 610 and a second portion 620, and the first portion 610 and the second portion 620 may be vertically arranged. In the embodiment of the present application, the first portion 610 of the flexible circuit board 600 may be fixedly connected to the pole piece 500. Alternatively, the second portion 620 of the flexible circuit board 600 may be fixedly connected to at least a portion of the outer surface of the single battery 210.

[0066] Continue to refer Figure 2 On the basis of the above embodiment, in one possible implementation, the first part 610 of the flexible circuit board 600 may be a nickel sheet, which may be electrically connected to the side of the electrode sheet 500 facing away from the single battery 210 by welding. The second part 620 of the flexible circuit board 600 may be bonded and connected to at least part of the outer surface of the single battery 210. In this way, a part of the outer surface of the single battery 210 is connected to the flexible circuit board 600, and another part of the outer surface of the single battery 210 is connected to the connecting portion 300.

[0067] Continue to refer Figure 2On the basis of the above embodiment, the battery module 100 may further include: a battery management system 700. The battery management system 700 may be located at one end of the battery cell unit 200 in the second direction. In the embodiment of the present application, a plug-in terminal 710 may be provided on the side of the battery management system 700 facing the battery cell unit 200. In a possible implementation manner, in combination with Figure 4 From the perspective of the flexible circuit board 600, one end facing the battery management system 700 may have a plug-in portion 630. It is understandable that the plug-in portion 630 of the flexible circuit board 600 may cooperate with the plug-in end 710 of the battery management system 700, so that the plug-in portion 630 of the flexible circuit board 600 can be inserted into the plug-in end 710 of the battery management system 700, so that the flexible circuit board 600 and the battery management system 700 are electrically connected.

[0068] Continue to refer Figure 2 On the basis of the above embodiment, the battery module 100 may further include: a protective plate 800. The protective plate 800 may be located on the side of the pole piece 500 facing away from the single battery 210. In the embodiment of the present application, the protective plate 800 may be fixedly connected to the pole piece 500. In a possible implementation, the protective plate 800 may be connected to the pole piece 500 by bonding, which is not limited in the embodiment of the present application. It is understandable that the protective plate 800 can play a role in insulation and heat insulation.

[0069] Continue to refer Figure 2 On the basis of the above embodiment, the battery module 100 may further include: foam 900. The foam 900 may be located on the side of the second portion 620 of the flexible circuit board 600 facing away from the single battery 210. In the embodiment of the present application, the foam 900 may be fixedly connected to the flexible circuit board 600. In a possible implementation, the foam 900 may be connected to the flexible circuit board 600 by bonding, so that the foam 900 can be covered on the second portion 620 of the flexible circuit board 600, and the embodiment of the present application is not limited here. It can be understood that the foam 900 can play a role of buffer protection.

[0070] It is understandable that in the embodiment of the present application, a cylindrical battery cell with a diameter of 46 mm is used as an example. Several cylindrical batteries can be positioned and extruded by tooling, and then fixedly connected by the connecting portion 300, so as to achieve a certain number of cylindrical batteries fixed in groups. After the cylindrical batteries are fixed in groups, the pole piece 500 and the flexible circuit board 600 can be connected by welding, respectively, and then the tooling is removed, and the protective plate 800 is bonded to one side of the pole piece 500, and the foam 900 is bonded to one side of the flexible circuit board 600. After completing the assembly of the above modules, the module is flipped 90 degrees, and the cylindrical battery cell is connected to the liquid cooling plate 400 by a heat-conducting structural adhesive, thereby completing the assembly of the battery module 100. In this way, the battery module 100 provided in the embodiment of the present application removes structures such as the plastic base and the plastic bracket compared to the traditional cylindrical battery cell, making the overall structure simpler and more reliable.

[0071] In a second aspect, an embodiment of the present application provides a battery pack (not shown in the figure). The battery pack may include the above-mentioned battery module 100. In a possible implementation, the number of the battery module 100 may be at least one, which is not limited in the embodiment of the present application.

[0072] In the embodiment of the present application, the battery module 100 provided in the embodiment of the present application can connect the battery cell units 200 to each other through the connecting portion 300, simplifying the structure of the battery module 100 and improving the grouping efficiency of the battery module 100. In addition, the liquid cooling plate 400 can directly contact one end of the single battery 210, significantly reducing the number of liquid cooling plates 400, thereby reducing the cost of the battery module 100.

[0073] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0074] It should be noted that the phrases "in specific implementation", "in some embodiments", "in this embodiment", "exemplarily" and the like mentioned in the specification indicate that the described embodiment may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments that are explicitly or not explicitly described.

[0075] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0076] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0077] In addition, spatially relative terms, such as "below," "below," "below," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The battery pack may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0078] Finally, it should be noted that those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art not disclosed by the present invention, are not limited to the precise structure described above and shown in the drawings, and may be modified and changed in various ways without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A battery module, characterized in that: include: At least two battery cell units arranged in parallel in a first direction, each of the battery cell units comprising at least two rows of a plurality of single batteries arranged in parallel in a second direction; A connecting portion, the connecting portion being located between the two battery core units in the first direction, and the connecting portion being used to connect at least a portion of the outer surface of each of the single cells; A liquid cooling plate, the liquid cooling plate being located between two rows of the single cells in the third direction, the liquid cooling plate being used for contacting with the single cells to dissipate heat; The first direction, the second direction and the third direction are arranged perpendicular to each other.

2. The battery module according to claim 1, characterized in that: Each of the single cells has a first end and a second end. The second ends of the two columns of single cells are arranged opposite to each other, and the liquid cooling plate is located between the second ends of the two columns of single cells.

3. The battery module according to claim 2, characterized in that: The connecting part includes a flat plate, a glue layer and a glue blocking strip; The adhesive layer is located on a side of the flat plate facing the battery cell unit, the adhesive strip is sleeved on the outer peripheral side of the adhesive layer, one side of the adhesive layer is bonded to the flat plate, and the other side of the adhesive layer is bonded to at least part of the outer surface of the single battery.

4. The battery module according to claim 3, characterized in that: The adhesive layer has a plurality of grooves on one side facing the battery cell, and the grooves are matched with at least a portion of the outer surface of the single battery, so that the adhesive layer is connected to the single battery through the grooves.

5. The battery module according to any one of claims 2 to 4, characterized in that: Also includes: Pole piece; The pole piece is located at the first end of the single cell, and the pole piece is electrically connected to the single cell.

6. The battery module according to claim 5, characterized in that: Also includes: A flexible circuit board, the flexible circuit board having a first portion and a second portion, the first portion and the second portion being arranged vertically; The first part is fixedly connected to the pole piece, and the second part is fixedly connected to at least a portion of the outer surface of the single battery.

7. The battery module according to claim 6, characterized in that: Also includes: A battery management system, the battery management system is located at one end of the battery cell unit in the second direction; The battery management system is provided with a plug-in terminal, and the end of the flexible circuit board facing the battery management system has a plug-in portion, and the plug-in portion is inserted into the plug-in terminal to electrically connect the flexible circuit board and the battery management system.

8. The battery module according to claim 5, characterized in that: Also includes: A protective plate, the protective plate being located on a side of the pole piece facing away from the single battery; The protective plate and the pole piece are fixedly connected.

9. The battery module according to claim 6, characterized in that: Also includes: Foam, the foam is located on a side of the second portion of the flexible circuit board facing away from the single battery; The foam and the flexible circuit board are fixedly connected.

10. A battery pack, characterized in that: A battery module comprising any one of claims 1 to 9.

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