CN216750050U - Battery module liquid cooling plate subassembly - Google Patents

Abstract

The utility model provides a battery module liquid cooling plate assembly, which comprises: the plate body member comprises a lower bottom plate, a first side plate and a second side plate, wherein the first side plate and the second side plate are respectively positioned at two opposite sides of the lower bottom plate; the liquid inlet flow guide pipe is provided with a liquid inlet, a first port and a second port; the liquid outlet flow guide pipe is provided with a liquid outlet, a third port and a fourth port; a first cooling tube having a first inlet end and a first outlet end, the first inlet end connected to the first port, the first outlet end connected to the third port; a second cooling tube having a second inlet end and a second outlet end, the second inlet end being connected to the second port, the second outlet end being connected to the fourth port; wherein, the first cooling pipe and the second cooling pipe extend along the lower bottom plate, the first side plate and the second side plate in a fitting manner.

Description

Battery module liquid cooling plate subassembly

Technical Field

The utility model mainly relates to a battery, in particular to a battery module liquid cooling plate.

Background

The new energy electric automobile is widely developed in recent years as an important application in the field of new energy, and gradually enters the lives of people. The power battery is used as a core power source of the new energy electric automobile and provides driving force for the new energy electric automobile, and the battery module is an important constituent unit of the power battery and is a core part of a power battery system.

The lithium ion power battery is more and more widely applied to the field of new energy vehicles by virtue of the characteristics of high capacity, long cycle life, high safety and the like. However, compared with the conventional fuel vehicle, the problems of anxiety mileage, long charging time and the like become main problems which hinder the development of the electric vehicle. Therefore, the super fast charging capability becomes a common development target of battery factories and whole automobile factories. The super fast-charging lithium ion battery can generate a large amount of heat in the charging and discharging process, if power cannot be dissipated timely, the consistency among the batteries is poor, the service performance is reduced, and thermal runaway phenomena such as fire, explosion and the like can occur in serious cases.

Therefore, in the design of the lithium ion power battery pack, a battery heating system and a battery cooling system are designed according to the heating and heat dissipation requirements, so that the battery is maintained in a proper temperature range, and the performance and the service life of the battery are ensured.

At present, natural cooling, forced air cooling and liquid cooling are mainly adopted for cooling the power battery, and along with the improvement of battery capacity and charging and discharging multiplying power requirements, a high-voltage platform technology and a super charging pile matched with the high-voltage platform technology gradually appear in the field of view of the public. However, when the super fast charging realizes a faster charging speed, the high-rate charging of the power battery can cause the problems that the temperature of important parts such as the positive electrode of the battery core is increased too fast and the temperature difference of each part of the whole battery pack is large. Therefore, a liquid cooling system capable of reducing the temperature difference of each part of the battery pack while efficiently dissipating heat is needed to meet the requirement of rapidly and uniformly cooling the power battery under a high-power high-voltage system platform.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a liquid cooling plate assembly of a battery module, which has higher heat dissipation efficiency and more uniform heat dissipation effect.

In order to solve the above technical problem, the present invention provides a liquid cooling plate assembly for a battery module, including: the plate body member comprises a lower bottom plate, a first side plate and a second side plate, wherein the first side plate and the second side plate are respectively positioned at two opposite sides of the lower bottom plate; the liquid inlet flow guide pipe is provided with a liquid inlet, a first port and a second port; the liquid outlet flow guide pipe is provided with a liquid outlet, a third port and a fourth port; a first cooling tube having a first inlet end and a first outlet end, the first inlet end connected to the first port, the first outlet end connected to the third port; a second cooling tube having a second inlet end and a second outlet end, the second inlet end being connected to the second port, the second outlet end being connected to the fourth port; wherein, the first cooling pipe and the second cooling pipe extend along the lower bottom plate, the first side plate and the second side plate in a fitting manner.

In an embodiment of the present invention, the liquid inlet flow guiding pipe and the liquid outlet flow guiding pipe are arranged in parallel with the first end surface of the plate member, and the liquid inlet flow guiding pipe and the liquid outlet flow guiding pipe are adjacent to each other.

In an embodiment of the present invention, the liquid inlet is located in the middle of the upper side of the liquid inlet flow guide pipe, and the first port and the second port are located at two ends of the lower side of the liquid inlet flow guide pipe respectively; the liquid outlet is located go out liquid honeycomb duct upside middle part, third port and fourth port are located respectively the downside both ends of feed liquor honeycomb duct.

In an embodiment of the utility model, the plate member further includes an upper bottom plate, the upper bottom plate is joined to the first side plate and the second side plate, and encloses a cavity with the lower bottom plate, and the battery module is placed in the cavity.

In an embodiment of the present invention, the extension lines of the first cooling pipe and the second cooling pipe are adjacent.

In an embodiment of the present invention, the extension lines of the first cooling pipe and the second cooling pipe are axisymmetrical with respect to the lower bottom surface of the plate member.

In an embodiment of the present invention, the first cooling pipe includes a first side liquid inlet pipeline and a first side liquid outlet pipeline; the second cooling pipe comprises a second side liquid inlet pipeline and a second side liquid outlet pipeline; the first side liquid inlet pipeline extends along the first side surface in a fitting mode, and the first side liquid outlet pipeline extends along the second side surface in a fitting mode; the second side feed liquor pipeline is followed the laminating of second side extends, second side drain pipeline is followed the laminating of first side extends.

In an embodiment of the present invention, the first cooling pipe further includes a first lower bottom surface pipeline, and the second cooling pipe further includes a second lower bottom surface pipeline; the first lower bottom surface pipeline, the first side liquid inlet pipeline and the first side liquid outlet pipeline are integrally formed; the second lower bottom surface pipeline, the second side liquid inlet pipeline and the second side liquid outlet pipeline are integrally formed.

In an embodiment of the present invention, the first cooling pipe and the second cooling pipe are attached to the lower bottom plate, the first side plate and the second side plate by welding.

The utility model also provides a battery pack which comprises the battery module liquid cooling plate component in any one of the embodiments.

Compared with the prior art, the liquid cooling plate of the battery module can cool the bottom plate and the side plates of the battery pack at the same time, the heat dissipation area is remarkably increased compared with that of the common liquid cooling plate, and meanwhile, the temperature difference of each part of the battery pack during rapid high-rate charging is reduced, so that the charging efficiency of the battery is ensured, the safety performance of the battery is improved, and the cycle life of the battery is prolonged.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the principle of the application. In the drawings:

fig. 1 is an isometric view of a battery module liquid cooling plate assembly according to an embodiment of the present application.

Fig. 2 is a side view of a battery module liquid cooling plate assembly according to an embodiment of the present application.

Fig. 3 is a front view of a battery module liquid cooling plate assembly according to an embodiment of the present application.

Fig. 4 is a bottom view of a battery module liquid cooling plate assembly according to an embodiment of the present application.

Fig. 5 is a schematic view of a flow channel of a liquid cooling plate assembly of a battery module according to an embodiment of the present application.

Fig. 6A is a schematic diagram of a liquid cooling plate assembly of a battery module according to an embodiment of the present application connected to the battery module.

Fig. 6B is a partially enlarged schematic view of a liquid cooling plate assembly of a battery module and a battery module according to an embodiment of the present disclosure.

Wherein the designations of FIGS. 1-6B are as follows:

battery module liquid cooling plate assembly 10

Plate body member 110

First side plate 111

Second side plate 112

Lower plate 113

Upper base plate 114

Flow path member 120

Liquid inlet flow guide pipe 1210

First port 1211

Second port 1212

Liquid inlet 1213

First cooling tube 1214

First inlet end 1214a

First side inlet channel 1214b

First lower floor line 1214c

First side liquid outlet pipeline 1214d

First outlet end 1214e

Liquid outlet flow guide tube 1220

Third port 1221

Fourth port 1222

Liquid outlet 1223

Second cooling pipe 1224

Second inlet port 1224a

Second side inlet piping 1224b

Second lower floor piping 1224c

Second side liquid outlet pipe 1224d

A second outlet port 1224e

Battery module 20

Detailed Description

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only examples or embodiments of the application, from which the application can also be applied to other similar scenarios without inventive effort for a person skilled in the art. Unless otherwise apparent from the context, or otherwise indicated, like reference numbers in the figures refer to the same structure or operation.

As used in this application and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … … surface," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, so that the scope of the present application is not to be construed as being limited. Further, although the terms used in the present application are selected from publicly known and used terms, some of the terms mentioned in the specification of the present application may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein. Further, it is required that the present application is understood not only by the actual terms used but also by the meaning of each term lying within.

Fig. 1 is an isometric view of a battery module liquid cooling plate assembly according to an embodiment of the present application. As shown in fig. 1, the present invention provides a battery module liquid cooling plate assembly 10, comprising: plate body member 110, liquid inlet guide pipe 1210, liquid outlet guide pipe 1220, first cooling pipe 1214 and second cooling pipe 1224.

In some embodiments, the panel member 110 includes a lower base plate 113, a first side plate 111 and a second side plate 112 respectively located at opposite sides of the lower base plate 113; a liquid inlet guide tube 1210 having a liquid inlet 1213, a first port 1211 and a second port 1212; a liquid outlet guide tube 1220 having a liquid outlet 1223, a third port 1221 and a fourth port 1222; a first cooling tube 1214 having a first inlet end 1214a and a first outlet end 1214e, the first inlet end 1214a being connected to the first port 1211, the first outlet end 1214e being connected to the third port 1221; a second cooling pipe 1224 having a second inlet end 1224a and a second outlet end 1224e, the second inlet end 1224a being connected to the second port 1212, the second outlet end 1224e being connected to the fourth port 1222; the first cooling pipe 1214 and the second cooling pipe 1224 extend along the lower plate 113, the first side plate 111, and the second side plate 112.

Referring to fig. 1, in the present embodiment, the first side surface 110 and the second side surface 112 of the plate member 10 are perpendicular to the lower plate 113, and the first side surface 110, the second side surface 112 and the lower plate 113 can be regarded as being connected in a 'U' shape. Further, the first side surface 110, the second side surface 112 and the lower plate 113 are designed as flat plates, and the U-shaped plate body member 10 is formed by stamping, so that the contact area between the plate body member 10 and the battery module 20 can be greatly increased (the first side surface 110, the second side surface 112 and the lower plate 113 are all in contact with the battery module 20), and thus the heat conduction efficiency is improved.

In other embodiments of the present invention, the first side 110, the second side 112 and the lower plate 113 may also be connected by a welding process, and the connection manner is not particularly limited in this application.

Preferably, in some embodiments of the present invention, the plate member 10 further includes an upper bottom plate 114, the upper bottom plate 114 is engaged with the first side plate 111 and the second side plate 112, and encloses a cavity with the lower bottom plate 113, and the battery module 20 is placed in the cavity. The upper plate 114 may achieve the technical effect of fixing the battery module 20 inside the battery module liquid cooling plate assembly 10.

In other embodiments of the present invention, the contact portion between the battery module 20 and the battery module liquid cooling plate assembly 1 may be bonded by using a conductive material with viscosity, such as a thermally conductive adhesive, a thermally conductive gel, or the like, to achieve similar technical effects, which is not limited in this application.

In some embodiments, the first inlet port 1214a and the first port 1211, the first outlet port 1214e and the third port 1221, the second inlet port 1224a and the second port 1212, and the second outlet port 1224e and the fourth port 1222 are connected by a hole-drilling welding process, which is not particularly limited herein.

Fig. 2 is a side view of a battery module liquid cooling plate assembly according to an embodiment of the present application. Referring to fig. 1-2 in combination, in the present embodiment, the liquid inlet guide tube 1210 and the liquid outlet guide tube 1220 are disposed in parallel on the first end surface of the plate member 110, i.e., the left side surface of the plate member 110, and the liquid inlet guide tube 1210 and the liquid outlet guide tube 1220 are adjacent to each other. Further, a liquid inlet 1213 is provided on the upper side of the liquid inlet flow guide tube 1210 for flowing the coolant into the battery module liquid cooling plate assembly 10. A first port 1211 is formed at one end (right end in the figure) of the lower side of the liquid inlet guide pipe 1210, and a second port 1212 is formed at the other end (left end in the figure 1); similarly, the liquid outlet 1223 is disposed on the upper side of the liquid outlet guide tube 1220 for allowing the cooling liquid to flow out of the battery module liquid cooling plate assembly 10. A third port 1221 is provided at one end (left end in the figure) of the lower side of the liquid outlet guide tube 1220, and a fourth port 1222 is provided at the other end (right end in the figure 1). Optionally, in some embodiments, the liquid inlet 1213 is located in the middle of the upper side of the liquid inlet flow guide 1210, and the liquid outlet 1223 is located in the middle of the upper side of the liquid outlet flow guide 1220.

Fig. 3 is a front view of a battery module liquid cooling plate assembly according to an embodiment of the present application. As shown in fig. 3 and 5, first cooling pipe 1214 includes a first side liquid inlet pipe 1214b and a first side liquid outlet pipe 1214 d; second cooling tube 1224 includes a second side inlet liquid conduit 1224b and a second side outlet liquid conduit 1224 d; wherein, the first side liquid inlet pipe 1214b extends along the first side surface 111, and the first side liquid outlet pipe 1214d extends along the second side surface 112; second side liquid inlet pipe 1224b extends along second side 112, and second side liquid outlet pipe 1224d extends along first side 111. In the embodiment shown in fig. 3, a distance is always kept between first side liquid inlet pipe 1214b and second side liquid outlet pipe 1224d and between first side liquid outlet pipe 1214d and second side liquid inlet pipe 1224b, and no intersection occurs. Preferably, in some embodiments, first side liquid inlet pipe 1214b and second side liquid outlet pipe 1224d are arranged in parallel, and first side liquid outlet pipe 1214d and second side liquid inlet pipe 1224b are arranged in parallel.

Fig. 4 is a bottom view of a battery module liquid cooling plate assembly according to an embodiment of the present application. As shown in fig. 4, the first cooling pipe 1214 further includes a first lower floor pipe 1214c, the second cooling pipe 1224 further includes a second lower floor pipe 1224c, and the first lower floor pipe 1214c and the second lower floor pipe 1224c are arranged in a serpentine shape without intersecting each other. The serpentine arrangement can increase the overall length of the flow channel member 120, increase the contact area between the first lower surface pipeline 1214c and the second lower surface pipeline 1224c and the lower plate 113, and achieve the technical effect of improving the cooling efficiency. The present application does not specifically limit the flow channel arrangement.

Fig. 5 is a schematic view of a flow channel of a liquid cooling plate assembly of a battery module according to an embodiment of the present application. Referring to fig. 1-5, the cooling liquid enters the battery module liquid cooling plate assembly 10 through the liquid inlet 1213 and the primary liquid inlet flow guide pipe 1210, and then is divided into two paths: the liquid enters the first cooling pipe 1214 through the first port 1211 and the first inlet port 1214a which are connected with each other, sequentially flows through the first side liquid inlet pipe 1214b, the first bottom surface pipe 1214c and the first side liquid outlet pipe 1214d to complete cooling of the battery module 20, then flows into the liquid outlet guide pipe 1220 through the first outlet port 1214e and the third port 1221 which are connected with each other, and finally flows out of the liquid outlet 1223; the other path enters the second cooling pipe 12224 through the connected second port 1212 and second inlet port 1224a, passes through the second side liquid inlet pipe 1224b, the second people's lower floor pipe 1224c, and the second side liquid outlet pipe 1224d in sequence to complete cooling of the battery module 20, then flows into the liquid outlet/guide pipe 1220 through the connected second outlet port 1224e and fourth port 1222, and finally flows out of the liquid outlet/guide pipe 1220.

In one embodiment of the present invention, the extended lines of the first cooling tube 1214 and the second cooling tube 1224 are adjacent. This setting can effectively reduce the difference in temperature of coolant liquid between the different positions of battery module in the cooling process when improving cooling efficiency, makes the cooling effect more even. The working principle is as follows:

the coolant flows through the flow channel member 120, and in the process, the coolant continuously absorbs heat inside the battery module 20 to achieve the heat dissipation effect on the battery module 20, but in the process, the temperature of the coolant gradually increases, and the cooling efficiency also decreases, so that the coolant further away from the first port 1211 and the second port 1212 has a poorer cooling effect, and the temperature of the battery module is higher, so that the temperature difference between the parts of the battery module is easily too large.

Referring to fig. 1-5, in this embodiment, a first inlet end 1214a and a first outlet end 1214e of the first cooling pipe 1214, i.e., a first port 1211 and a second port 1212 of the inlet flow-guiding pipe 1210, are adjacent to a second inlet end 1224a and a second outlet end 1224e of the second cooling pipe 1224, i.e., a fourth port 1222 and a third port 1221 of the outlet flow-guiding pipe 1220, respectively. I.e. the coolant flow direction in the two fluid ducts is always opposite.

Still further, in some embodiments of the present invention, the extended lines of the first cooling tubes 1214 and the second cooling tubes 1224 are axisymmetrical with respect to the lower bottom surface 113 of the plate body member 110.

In some embodiments of the present invention, first lower bottom surface channel 1214c is integrally formed with first side liquid inlet channel 1214b and first side liquid outlet channel 1214 d; the second lower floor pipe 1224c is integrally formed with the second side liquid inlet pipe 1224b and the second side liquid outlet pipe 1224 d. In other embodiments, first lower floor line 1214c, first side liquid inlet line 1214b, and first side liquid outlet line 1214d may be connected by a welding process; the second lower floor pipe 1224c, the second side liquid inlet pipe 1224b and the second side liquid outlet pipe 1224d may be connected by a welding process. The present application is not particularly limited with respect to the specific connection manner of the flow path member 120.

In some embodiments of the present invention, the first cooling pipe 1214 and the second cooling pipe 1224 are attached to the lower plate 113, the first side plate 111, and the second side plate 112 by welding. In other embodiments, the first cooling tube 1214 and the second cooling tube 1224 may be bonded to the lower plate 113, the first side plate 111, and the second side plate 112 by bonding, or may be directly formed by a stamping technique, which is not particularly limited herein.

Fig. 6A is a schematic diagram of a liquid cooling plate assembly of a battery module according to an embodiment of the present application connected to the battery module. Fig. 6B is a partially enlarged schematic view of a liquid cooling plate assembly of a battery module and a battery module according to an embodiment of the present disclosure. Referring to fig. 6A-6B in combination, the present invention also provides a battery pack including the battery module liquid cooling plate assembly 10 of any of the above embodiments. In one embodiment of the present invention, the battery module 20 is connected to the battery pack by end plates and bolts (not shown), and the battery pack is connected to the battery module liquid cooling plate assembly 10 by bonding.

Having thus described the basic concept, it will be apparent to those skilled in the art that the foregoing disclosure is by way of example only, and is not intended to limit the present application. Various modifications, improvements and adaptations to the present application may occur to those skilled in the art, although not explicitly described herein. Such modifications, improvements and adaptations are proposed in the present application and thus fall within the spirit and scope of the exemplary embodiments of the present application.

Also, this application uses specific language to describe embodiments of the application. Reference throughout this specification to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with at least one embodiment of the present application is included in at least one embodiment of the present application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate.

Similarly, it should be noted that in the preceding description of embodiments of the present application, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the embodiments. This method of disclosure, however, is not intended to require more features than are expressly recited in the claims. Indeed, the embodiments may be characterized as having less than all of the features of a single embodiment disclosed above.

Although the present application has been described with reference to the present specific embodiments, it will be recognized by those skilled in the art that the foregoing embodiments are merely illustrative of the present application and that various changes and substitutions of equivalents may be made without departing from the spirit of the application, and therefore, it is intended that all changes and modifications to the above-described embodiments that come within the spirit of the application fall within the scope of the claims of the application.

Claims (10)

1. The utility model provides a battery module liquid cooling plate subassembly which characterized in that includes:

the plate body member comprises a lower bottom plate, a first side plate and a second side plate, wherein the first side plate and the second side plate are respectively positioned at two opposite sides of the lower bottom plate;

the liquid inlet flow guide pipe is provided with a liquid inlet, a first port and a second port;

the liquid outlet flow guide pipe is provided with a liquid outlet, a third port and a fourth port;

a first cooling tube having a first inlet end and a first outlet end, the first inlet end connected to the first port, the first outlet end connected to the third port;

a second cooling tube having a second inlet end and a second outlet end, the second inlet end being connected to the second port, the second outlet end being connected to the fourth port;

wherein, the first cooling pipe and the second cooling pipe extend along the lower bottom plate, the first side plate and the second side plate in a fitting manner.

2. The battery module liquid cooling plate assembly of claim 1, wherein the liquid inlet flow guide tube and the liquid outlet flow guide tube are arranged parallel to the first end surface of the plate member, and the liquid inlet flow guide tube and the liquid outlet flow guide tube are adjacent.

3. The battery module liquid cooling plate assembly of claim 1, wherein the liquid inlet is located in the middle of the upper side of the liquid inlet flow guide pipe, and the first port and the second port are located at the two ends of the lower side of the liquid inlet flow guide pipe respectively;

the liquid outlet is located go out liquid honeycomb duct upside middle part, third port and fourth port are located respectively the downside both ends of feed liquor honeycomb duct.

4. The battery module liquid cooling plate assembly of claim 1, wherein the plate member further comprises an upper plate engaged with the first and second side plates and enclosing the lower plate to form a cavity in which the battery module is placed.

5. The battery module liquid cooling plate assembly of claim 1, wherein the extension lines of the first cooling tube and the second cooling tube are adjacent.

6. The battery module liquid cooling plate assembly of claim 1, wherein the extension lines of the first cooling tube and the second cooling tube are axisymmetric about the lower bottom surface of the plate member.

7. The battery module liquid cooling plate assembly of claim 1, wherein the first cooling tube comprises a first side inlet line and a first side outlet line;

the second cooling pipe comprises a second side liquid inlet pipeline and a second side liquid outlet pipeline;

the first side liquid inlet pipeline extends along the first side plate in a fitting mode, and the first side liquid outlet pipeline extends along the second side plate in a fitting mode;

the second side feed liquor pipeline is followed the laminating of second curb plate extends, second side drain pipe follows the laminating of first curb plate extends.

8. The battery module liquid cooling plate assembly of claim 7, wherein the first cooling tube further comprises a first lower floor line and the second cooling tube further comprises a second lower floor line;

the first lower bottom surface pipeline, the first side liquid inlet pipeline and the first side liquid outlet pipeline are integrally formed;

the second lower bottom surface pipeline, the second side liquid inlet pipeline and the second side liquid outlet pipeline are integrally formed.

9. The battery module liquid cooling plate assembly of claim 1, wherein the first cooling tube and the second cooling tube are attached to the bottom plate, the first side plate, and the second side plate by welding.

10. A battery pack comprising a battery module and a battery module liquid cooling plate assembly of any of claims 1-9.

Images