CN218731537U - Battery module - Google Patents

Abstract

The application discloses battery module includes: at least one cooling member, each cooling member having more than two cooling units, each cooling unit including two main cooling sections and one sub-cooling section, the two main cooling sections extending along a first direction and being arranged along a second direction perpendicular to the first direction; the auxiliary cooling section is connected between the two main cooling sections; wherein two adjacent cooling units share one main cooling section; the two main cooling sections and the auxiliary cooling section enclose to form a cooling space; and at least one cell housed in the cooling space, the cell having a first wall and a second wall; the main cooling section is attached to at least one first wall of the battery cell, and the auxiliary cooling section is attached to a second wall of the battery cell so as to dissipate heat of the battery cell.

Description

Battery module

Technical Field

The application relates to the technical field of electric automobiles, in particular to a battery module.

Background

At present, the application of power batteries is more and more extensive from the development of market conditions. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles and the like, and a plurality of fields such as military equipment and aerospace. With the continuous expansion of the application field of the power battery, the market demand is also continuously expanding.

In the use of battery module, electric core in the battery module can produce the heat. If the heat is too high, the performance and the lifespan of the battery module are adversely affected. Therefore, how to effectively dissipate heat of the battery cells of the battery module becomes an important research direction in the field.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery module to solve the too high performance that influences electric core of current battery module heat and the technical problem in life-span.

In order to achieve the above object, the utility model provides a battery module, include: at least one cooling member, each cooling member having more than two cooling units, each cooling unit including two main cooling sections and one sub-cooling section, the two main cooling sections extending along a first direction and being arranged along a second direction perpendicular to the first direction; the auxiliary cooling section is connected between the two main cooling sections; wherein two adjacent cooling units share one main cooling section; the two main cooling sections and the auxiliary cooling section enclose to form a cooling space; at least one cell housed in the cooling space, the cell having a first wall and a second wall; and a cooling circuit extending inside the cooling member, the cooling circuit penetrating the primary cooling section and the secondary cooling section; wherein the main cooling section is attached to at least one first wall of the cell, and the auxiliary cooling section is attached to a second wall of the cell.

The technical effect of the utility model lies in that, a battery module is provided, including an at least cooling member and an at least electric core. Each cooling piece has more than two cooling units, and every cooling unit includes two main cooling sections and an auxiliary cooling section, and two main cooling sections are arranged along the second direction of perpendicular to first direction, and the auxiliary cooling section is connected between two main cooling sections, and two adjacent cooling units share a main cooling section, and two main cooling sections enclose with an auxiliary cooling section and constitute the cooling space. At least one cell is accommodated in the cooling space, and the cell is provided with a first wall and a second wall. The main cooling section is attached to at least one first wall of the battery cell, and the auxiliary cooling section is attached to a second wall of the battery cell. So, the cooling piece of this application can be followed the first wall of electric core and wound around to the second wall of electric core, again from the second wall of electric core and wound around to another first wall, so circulation setting can increase the area of contact of electric core and cooling piece to dispel the heat to electric core, avoid electric core high temperature or temperature difference between the electric core too big, cause battery life loss and thermal runaway and cause the accident.

Drawings

The technical solutions and other advantages of the present application will become apparent from the following detailed description of specific embodiments of the present application when taken in conjunction with the accompanying drawings.

Fig. 1a is a schematic structural diagram of a battery module provided in embodiment 1 of the present application.

Fig. 1b is an exploded view of a battery module provided in embodiment 1 of the present application.

Fig. 1c is a schematic structural diagram of a cooling element provided in embodiment 1 of the present application.

Fig. 2a is a schematic structural diagram of a battery module provided in embodiment 2 of the present application.

Fig. 2b is an exploded view of a battery module provided in embodiment 2 of the present application.

Fig. 3a is an exploded view of a battery module provided in embodiment 3 of the present application.

Fig. 3b is a schematic structural diagram of a cooling element provided in embodiment 3 of the present application.

Fig. 4 is an exploded view of a battery module provided in embodiment 4 of the present application.

Fig. 5a is an exploded view of a battery module provided in embodiment 5 of the present application.

Fig. 5b is a schematic structural diagram of a cooling element provided in embodiment 5 of the present application.

The components of the drawings are identified as follows:

1. a cooling member; 10. a cooling unit; 11. a main cooling section; 12. a secondary cooling section; 100. a cooling space; 111. a first main cooling section; 111a, a first end; 111b, a second end; 112. a second main cooling section; 13. a first curved section; 14. a second curved section; 15. a third bend section; 2. an electric core; 2a, a first wall; 2b, a second wall; 1a, a first cooling piece; 1b, a second cooling element; 101. a first curved plate; 102. a second curved plate; 103. a third curved plate; 200. a cooling circuit; 201. a first cooling circuit; 202. a second cooling circuit; 200a and a liquid inlet; 200b, a liquid outlet; 210. a primary cooling flow path; 210a, a first main cooling flow channel; 210b, a second main cooling flow channel; 220. a secondary cooling flow channel; 230. a first curved cooling channel; 240. a second curved cooling channel; 250. a third serpentine cooling channel.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; may be mechanically, electrically or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

The present embodiment provides a battery module, which includes at least one cooling element and at least one battery cell. Each cooling piece has more than two cooling units, and every cooling unit includes two main cooling sections and an auxiliary cooling section, and two main cooling sections are arranged along the second direction of perpendicular to first direction, and the auxiliary cooling section is connected between two main cooling sections, and two adjacent cooling units share a main cooling section, and two main cooling sections enclose with an auxiliary cooling section and constitute the cooling space. At least one cell is accommodated in the cooling space, and the cell is provided with a first wall and a second wall. The main cooling section is attached to at least one first wall of the battery cell, and the auxiliary cooling section is attached to a second wall of the battery cell. And the surface area of the second wall of the battery cell is smaller than that of the first wall of the battery cell. The cooling part of this application can be followed the first wall of electric core and wound around to the second wall of electric core, again from the second wall of electric core and wound around to another first wall, so circulation sets up, can increase the area of contact of electric core and cooling part to dispel the heat to electric core, avoid electric core high temperature or temperature difference between the electric core too big, cause battery life to reduce and thermal runaway and cause the accident.

Example 1

As shown in fig. 1a-1c, the present embodiment provides a battery module, which includes at least one cooling member 1, each cooling member 1 has two or more cooling units 10, each cooling unit 10 includes two main cooling sections 11 and one auxiliary cooling section 12, the two main cooling sections 11 extend along a first direction and are arranged along a second direction perpendicular to the first direction, the auxiliary cooling section 12 is connected between the two main cooling sections 11, two adjacent cooling units 10 share one main cooling section 11, and the two main cooling sections 11 and one auxiliary cooling section 12 enclose a cooling space 100. At least one cell 2 is accommodated in the cooling space, and the cell 2 has a first wall 2a and a second wall 2b. The main cooling section 11 is attached to at least one first wall 2a (side wall) of the battery cell 2, and the sub-cooling section 12 is attached to a second wall 2b (bottom wall) of the battery cell 2.

Specifically, each main cooling section 11 has two end portions k, each main cooling section 11 includes two first main cooling sections 111 extending along two third directions and one second main cooling section 112 extending along the first direction, the first main cooling section 111 has a first end 111a and a second end 111b, the second main cooling section 112 is connected between the first ends 111a of the two first main cooling sections 111, the second end 111b forms the end portion k, and each secondary cooling section 12 is connected between the end portions of the two adjacent main cooling sections 11. The shape of the main cooling section 11 of cooling piece 1 is roughly "U" shape, so set up, cooling piece 1 is the three-dimensional space structure that constitutes by main cooling section 11 and vice cooling section 12 interconnect, make this cooling piece 1 laminate mutually with the three wall of electric core 2, two lateral walls and a diapire that the area of cooling piece 1 and electric core 2 is the biggest promptly laminate each other, in time take away the produced heat of electric core 2, thereby effectual heat dissipation to electric core 2 carries out, can also prevent simultaneously that electric core 2 from stretching when the heat dissipation out of control appearing and influencing other electric core 2 or other parts. The third direction is respectively perpendicular to the first direction and the second direction, the first direction is an x direction, the second direction is a y direction, and the third direction is a z direction.

In this embodiment, the cooling member 1 is a liquid cooling member, and the cooling member 1 includes at least one cooling circuit 200, and a liquid inlet 200a and a liquid outlet 200b in fluid communication with the cooling circuit 200. The inlet port 200a is located on the upstream side in the flow direction of the cooling liquid of the cooling circuit 200, and the outlet port 200b is located on the downstream side in the flow direction of the cooling liquid of the cooling circuit 200.

Further, a main cooling channel 210 is disposed inside the main cooling section 11, an auxiliary cooling channel 220 is disposed inside the auxiliary cooling section 12, and the main cooling channel 210 and the auxiliary cooling channel 220 are communicated to form the cooling circuit 200.

Every first main cooling section 111 is inside to be provided with first main cooling runner 210a, and second main cooling runner 210b is inside to be provided with in second main cooling section 112, first main cooling runner 210a and the intercommunication of second main cooling runner 210b form main cooling runner 210, every vice cooling runner 220 communicates two adjacent main cooling runners 210. Therefore, in the process that the cooling liquid flows in the cooling loop 200, the heat generated by the battery cell 2 can be taken away in time, so that the battery cell 2 can be effectively cooled.

Each cooling unit 10 includes a first curved plate 101, a second curved plate 102, and a third curved plate 103 which are integrally formed, and the second curved plate 102 connects the first curved plate 101 and the third curved plate 103. The thickness of the second curved plate 102 is smaller than or equal to the thickness of the second curved plate 102, and the thickness of the third curved plate 103 is equal to the thickness of the first curved plate 101.

The cooling unit 10 provided in the present embodiment has two circuitous cooling circuits 201 and 202, the first cooling circuit 201 being opened inside the first curved plate 101, the second cooling circuit 202 being opened inside the second curved plate 102. In the present embodiment, two cooling circuits 201 and 202 are provided inside the cooling member 1, and the circulation sequence of each cooling circuit 201 and 202 can be controlled separately. For example, in the process of dissipating heat from the battery cell 2, the flow of the cooling liquid in the first cooling circuit 201 is controlled first, and then the flow of the cooling liquid in the second cooling circuit 202 is controlled, that is, the flow sequence of the cooling liquids in the two cooling circuits 201 and 202 is controlled successively, so that part of the heat generated by the battery cell 2 can be taken away through the first cooling circuit 201 first, and then part of the heat generated by the battery cell 2 can be taken away through the second cooling circuit 202, so as to gradually reduce the temperature of the battery cell 2, and prevent the occurrence of a phenomenon of runaway heat dissipation due to the battery cell 2. Of course, if the battery cell 2 generates a large amount of heat in a unit time, the two cooling circuits 201 and 202 may be controlled to flow simultaneously, so that the heat generated by the battery cell 2 is taken away in a short time, and the battery cell 2 may be prevented from spreading to affect other battery cells 2 or other components when the heat dissipation is out of control.

It should be noted that, when assembling the battery module, generally, a plurality of battery cells 2 are arranged in one direction (for example, in the y direction) to form a battery core pack, and any two adjacent battery cells in the battery core pack have the largest wall area and are disposed opposite to each other, and then the cooling assembly 1 is mounted on the battery core pack.

In this embodiment, the surface area of the second wall 2b of the battery cell 2 is smaller than the surface area of the first wall 2a of the battery cell 2, where the first wall 2a is the wall with the largest surface area of the battery cell 2, and the second wall 2b is the wall connected between the two first walls 2 a. In one cell group, the first walls 2a of two adjacent cells 2 are oppositely arranged, so that the contact area between the cooling element 1 and the cells 2 is increased as much as possible when the liquid cooling element is mounted on the cell group, thereby effectively dissipating heat from the cells 2.

In the present embodiment, each cooling unit 10 further includes a first bending section 13 and a second bending section 14, the first end 111a of the first main cooling section 111 and the second main cooling section 112 are connected by the first bending section 13, and the second end 111b of the first main cooling section 111 and the auxiliary cooling section 12 are connected by the second bending section 14.

The first meandering section 13 is provided with a first meandering cooling channel 230 therein, the second meandering section 14 is provided with a second meandering cooling channel 240 therein, the first main cooling channel 210a and the second main cooling channel 210b are communicated through the first meandering cooling channel 230, and the first main cooling channel 210a and the sub cooling channel 220 are communicated through the second meandering cooling channel 240. The curved cooling flow channels arranged inside the two curved sections can avoid the phenomenon of uneven flow rate of the cooling liquid at the corners of the main cooling section 11 and the auxiliary cooling section 12, namely, the phenomenon of flow resistance generated inside the cooling piece 1 is avoided, and further, the cooling piece 1 can realize uniform heat dissipation on the battery cell 2.

An elastic and insulating heat conduction member (not shown) may be disposed between the battery cell 2 and the cooling member 1, or a heat conduction layer may be formed on the surface of the cooling member 1, so as to meet the requirement of heat conduction and absorb the deformation and expansion force generated when the battery cell 2 expands; when placing at least one electric core 2 in a cooling unit 10, place heat conduction piece between electric core 2, when preventing that single electric core 2 from appearing the thermal runaway, avoid producing between arbitrary adjacent electric core 2 that heat and stretch.

Example 2

As shown in fig. 2a-2b, the present embodiment provides a battery module, which includes most of the technical solutions of embodiment 1, and is different in that the first main cooling section 111 is in a linear structure, the second main cooling section 112 is in a circular arc structure, each cooling unit 10 includes a third bending section 15, and the secondary cooling section 12 is connected to the second end 111b of the first main cooling section 111 through the third bending section 15.

Specifically, each of the main cooling sections 11 includes a first main cooling section 111 extending along two third directions and a second main cooling section 112 extending along the first direction, the first main cooling section 111 has a first end 111a and a second end 111b, the second main cooling section 112 is connected between the first ends 111a of the two first main cooling sections 111, and two ends of the auxiliary cooling section 12 are respectively connected with the second ends 111b of the two adjacent first main cooling sections 111. Wherein, two first main cooling sections 111 are the linear type structure, and second main cooling section 112 is the circular arc structure, so set up, can reduce the production of flow resistance, can also increase cooling circuit 200's route to increase the circulation length of coolant liquid on electric core 2, dispel the heat with further electric core 2, improve the performance and the life-span of electric core. In this embodiment, the third direction is perpendicular to the first direction and the second direction, the first direction is an x direction, the second direction is a z direction, and the third direction is a y direction.

Each cooling unit 10 further includes a third bent section 15, and the sub cooling section 12 and the second end 111b of the first main cooling section 111 are connected by the third bent section 15. Wherein, the second main cooling section 112 is a circular arc structure. Set up the second main cooling section 112 of third bending section 15 and circular arc structure in the corner of cooling piece 1, can avoid the coolant liquid to appear the inhomogeneous phenomenon of velocity of flow in the corner of main cooling section 11 and vice cooling section 12, avoid producing the flow resistance in cooling piece 1 inside promptly, and then can make cooling piece 1 realize evenly dispelling the heat to electric core 2.

Further, a third curved cooling channel 250 is provided inside the third curved section 15, and the secondary cooling channel 220 and the main cooling channel 210 are communicated through the third curved cooling channel 250. The second main cooling section 112 of the circular arc structure is also provided with a curved cooling flow passage. Therefore, by arranging the curved cooling flow channel at the corner of the cooling part 1, the phenomenon of uneven flow velocity at the corner when the cooling liquid flows through the corner can be avoided, namely, the flow resistance generated inside the cooling part 1 is avoided, and then the cooling part 1 can uniformly radiate the battery cell 2.

It should be noted that, in the battery module provided in this embodiment, in the assembly process, a plurality of battery cells 2 are generally arranged in one direction (for example, in the y direction) to form a battery core pack, and any two adjacent battery cells in the battery core pack with the walls having the largest surface areas are arranged opposite to each other, and then the cooling assembly 1 is mounted on the battery core pack. In the present embodiment, two battery cells 2 are defined as a battery cell pair, and the battery cell pair is accommodated in one cooling space 100.

In this embodiment, the surface area of the second wall 2b of the battery cell 2 is smaller than the surface area of the first wall 2a of the battery cell 2, where the first wall 2a is a side wall with the largest surface area of the battery cell 2, and the second wall 2b is a side wall connected between two first walls 2 a. In a core group, first wall 2a of two adjacent electric cores 2 sets up relatively, so set up, when cooling member 1 installs on the core group, the electric core of two adjacent cooling units 10 is to sharing a main cooling section 11, when satisfying the charge-discharge multiplying power of battery module, the area of contact between cooling member 1 and the electric core 2 that increases as far as possible to dispel the heat to electric core 2 effectively. Wherein the surface area of the second wall 2b is smaller than the surface area of the first wall 2 a.

Each cooling space 100 of the cooling member 1 provided in this embodiment can accommodate at least two battery cells 2, and the cooling member 1 has a cooling circuit 200. Compared with the battery module in embodiment 1, the charging and discharging rate of the cooling piece 1 suitable for the battery core 2 is lower than that of the cooling piece 1 suitable for the battery core 2 in embodiment 1.

Example 3

As shown in fig. 3a-3b, the present embodiment provides a battery module, which includes most of the technical solutions of embodiment 1, and is different in that the main cooling section 11 is a bent structure, and both ends of the auxiliary cooling section 12 are respectively connected with the ends of the two main cooling sections 11.

Specifically, each cooling unit 10 includes two main cooling sections 11 and one auxiliary cooling section 12, the two main cooling sections 11 extend along a first direction and are arranged along a second direction perpendicular to the first direction, the auxiliary cooling section 12 is connected between the two main cooling sections 11, two adjacent cooling units 10 share one main cooling section 11, and the two main cooling sections 11 and one auxiliary cooling section 12 enclose to form a cooling space 100. Wherein, main cooling section 11 is the bending structure, the both ends of vice cooling section 12 respectively with two end connection of main cooling section 11, and each vice cooling section 12 realizes transitional coupling through third bending segment 15 with main cooling section 11, this bending segment can avoid the coolant liquid to appear the inhomogeneous phenomenon of velocity of flow in main cooling section 11 and the corner of vice cooling section 12, avoid producing the flow resistance in cooling piece 1 inside promptly, and then can make cooling piece 1 realize evenly dispelling the heat to electric core 2.

Further, a third curved cooling channel 250 is provided inside the third curved section 15, and the secondary cooling channel 220 and the main cooling channel 210 are communicated through the third curved cooling channel 250. The third curved cooling channel 250 can avoid flow resistance generated inside the cooling member 1, and further can enable the cooling member 1 to uniformly dissipate heat of the battery cell 2.

In an embodiment, the bent structure of the main cooling section 11 may be at least one of C-shaped, U-shaped, W-shaped, and S-shaped, that is, the main cooling section 11 may extend along the first direction or the third direction and at different angles. This bending structure mainly used increases the circulation length of cooling part 1 in main cooling section 11, increases the area of contact of main cooling section 11 and electric core 2 to the dwell time of extension coolant liquid on electric core 2 surface, so that more heats that electric core 2 produced are taken away to cooling part 1 in unit interval, can also prevent that electric core 2 from spreading to influence other electric core 2 or other parts when the heat dissipation is out of control appearing. In this embodiment, the first direction is an x direction, the second direction is a y direction, and the third direction is a z direction.

In this embodiment, the surface area of the second wall 2b of the battery cell 2 is smaller than the surface area of the first wall 2a of the battery cell 2, where the first wall 2a is a side wall with the largest surface area of the battery cell 2, and the second wall 2b is a top wall connected between the two first walls 2 a. In one cell group, the first walls 2a of two adjacent cells 2 are oppositely arranged, so that when the cooling member 1 is mounted on the cell group, the contact area between the cooling member 1 and the cells 2 is increased as much as possible, so as to effectively dissipate heat from the cells 2. Wherein the surface area of the second wall 2b is smaller than the surface area of the first wall 2 a.

Each cooling space 100 of the cooling member 1 provided in the present embodiment can accommodate at least one battery cell 2, and the cooling member 1 has a cooling circuit 200. Compare in embodiment 1's battery module, this cooling piece 1 is applicable to the charge-discharge multiplying power of electric core 2 and is less than the charge-discharge multiplying power that cooling piece 1 of embodiment 1 is applicable to electric core 2.

Example 4

As shown in fig. 4, the present embodiment provides a battery module including most of the technical solutions of embodiment 2, which is different in that the extension directions of the main cooling section 11 and the sub-cooling section 12 are different, that is, the main cooling section 11 extends in a first direction and is arranged in a second direction perpendicular to the first direction, the first direction is a y direction, and the second direction is an x direction.

Specifically, each cooling unit 10 includes two main cooling sections 11 and one auxiliary cooling section 12, the two main cooling sections 11 extend along a first direction and are arranged along a second direction perpendicular to the first direction, the auxiliary cooling section 12 is connected between the two main cooling sections 11, two adjacent cooling units 10 share one main cooling section 11, and the two main cooling sections 11 and one auxiliary cooling section 12 enclose to form a cooling space 100. In this embodiment, the first direction is a y direction, the second direction is an x direction, and the third direction is a z direction.

The main cooling section 11 is of a bent structure, and two ends of the auxiliary cooling section 12 are respectively connected with the two main cooling sections 11.

In an embodiment, the bending structure of the main cooling section 11 may be at least one of a C shape, a U shape, a W shape, and an S shape, and is mainly used to increase the flowing length of the cooling member 1 in the main cooling section 11, and increase the contact area between the main cooling section 11 and the battery cell 2, so as to increase the residence time of the cooling liquid on the surface of the battery cell 2, so that the cooling member 1 takes away more heat generated by the battery cell 2 in a unit time, and further prevent the battery cell 2 from spreading to affect other battery cells 2 or other components when the thermal runaway occurs.

In this embodiment, the surface area of the second wall 2b of the battery cell 2 is smaller than the surface area of the first wall 2a of the battery cell 2, where the first wall 2a is a side wall with the largest surface area of the battery cell 2, and the second wall 2b is a bottom wall connected between the two first walls 2 a. Wherein the surface area of the second wall 2b is smaller than that of the first wall 2a, so that the contact area between the cooling member 1 and the battery cell 2 is increased as much as possible when the cooling member 1 is mounted on the battery cell pack, thereby effectively dissipating heat from the battery cell 2.

Each cooling space 100 of the cooling member 1 provided in the present embodiment can accommodate at least one battery cell 2, and the cooling member 1 has a cooling circuit 200. Compared with the battery module in embodiment 1, the charging and discharging rate of the cooling member 1 applied to the battery cell 2 is substantially the same or better than the charging and discharging rate of the cooling member 1 applied to the battery cell 2 in embodiment 1.

Example 5

As shown in fig. 5a-5b, the present embodiment provides a battery module, which includes most of the technical solutions of embodiment 1, and is different in that the number of the cooling members 1 is at least two, wherein the cooling member 1 with a larger size is sleeved on the cooling member 1 with a smaller size along a third direction.

Specifically, each cooling unit 10 includes two main cooling sections 11 and one auxiliary cooling section 12, the two main cooling sections 11 extend along a first direction and are arranged along a second direction perpendicular to the first direction, the auxiliary cooling section 12 is connected between the two main cooling sections 11, two adjacent cooling units 10 share one main cooling section 11, and the two main cooling sections 11 and one auxiliary cooling section 12 enclose to form a cooling space 100.

Each of the main cooling sections 11 includes two first main cooling sections 111 extending along the third direction and a second main cooling section 112 extending along the first direction, the first main cooling section 111 has a first end 111a and a second end 111b, the second main cooling section 112 is connected between the first ends 111a of the two first main cooling sections 111, and the two ends of the auxiliary cooling section 12 are respectively connected with the second ends 111b of the two adjacent first main cooling sections 111. The shape of the main cooling section 11 of cooling element 1 is roughly "U" shape, so set up, cooling element 1 is the three-dimensional space structure that constitutes by main cooling section 11 and vice cooling section 12 interconnect, make this cooling element 1 laminate mutually with the three wall of electric core 2, two the biggest lateral walls of area and a diapire of cooling element 1 and electric core 2 laminate each other promptly, thereby effectually carry out effectual heat dissipation to electric core 2, in time take away the produced heat of electric core 2, can also prevent simultaneously that electric core 2 from stretching when appearing the heat dissipation out of control and influencing other electric core 2 or other parts. The third direction is perpendicular to the first direction and the second direction, the first direction is an x direction, the second direction is a y direction, and the third direction is a z direction.

In the present embodiment, the number of the cooling elements 1 is at least two, and the number of the cooling elements 1 shown in fig. 5a-5b is 3, wherein the cooling element 1 with larger size is sleeved on the cooling element 1 with smaller size along the third direction.

In one embodiment, of any two adjacent cooling elements 1, the cooling element 1 with the larger dimension is sleeved on the cooling element 1 with the smaller dimension along the third direction. For example, the cooling member 1 having a larger size is defined as a first cooling member, the cooling member having a smaller size is defined as a second cooling member, and in any two adjacent cooling members 1, the first cooling member and the second cooling member may abut against each other or have a gap. Specifically, in one embodiment, the main cooling section 11 of the first cooling element and the main cooling section 11 of the second cooling element may abut against each other, and the sub-cooling section 12 of the first cooling element and the sub-cooling section 12 of the second cooling element may abut against each other. In an embodiment, a gap may exist between the main cooling section 11 of the first cooling part and the main cooling section 11 of the second cooling part, and a gap may exist between the auxiliary cooling section 12 of the first cooling part and the auxiliary cooling section 12 of the second cooling part, so that during the installation process, interference between the two cooling parts 1 is avoided, and the installation yield of the at least two cooling parts 1 is improved.

Further, in any two adjacent cooling members 1, the main cooling sections 11 of the two cooling members 1 are attached to the first wall of the battery core 2, and the auxiliary cooling sections 12 of the two cooling members 1 are attached to the second wall of the battery core 2. Wherein the second main cooling sections 112 of at least two cooling elements 1 are gradually increased or decreased in the third direction. That is, the second main cooling sections 112 of the plurality of cooling elements 1 gradually increase or decrease from top to bottom or from bottom to top in the third direction, so that at least two cooling elements 1 are stacked on one electric core pack.

In assembly of the battery module, the plurality of battery cells 2 are generally arranged in one direction to form a battery core pack, and then the cooling member 1 is mounted on the battery core pack. Therefore, the cooling members 1 are mounted on the same electric core group one by one in the present embodiment.

Each cooling unit 10 of the cooling member 1 provided in the present embodiment can accommodate at least one battery cell 2, and the cooling member 1 has a cooling circuit 200. Compare in the battery module of embodiment 1, this cooling piece 1 is applicable to the charge-discharge multiplying power of arbitrary electric core 2. That is to say, the user can match one or more than two cooling pieces 1 according to the charge-discharge multiplying power of the battery cell 2 to achieve the corresponding cooling effect. Certainly, the user can mutually match two or more than two cooling pieces 1 of different structures in any of embodiments 1 to 5 to satisfy the charge-discharge multiplying power of the battery cell 2, and then effectively dissipate heat from the battery cell 2.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The foregoing describes in detail a battery module provided in an embodiment of the present application, and a specific example is applied to explain the principle and the implementation of the present application, and the description of the foregoing embodiment is only used to help understand the technical solution and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.

Claims (10)

1. A battery module, comprising:

at least one cooling element (1), each cooling element (1) having more than two cooling units (10), each cooling unit (10) comprising two main cooling sections (11) and one auxiliary cooling section (12), the two main cooling sections (11) extending along a first direction and being arranged along a second direction perpendicular to the first direction; the auxiliary cooling section (12) is connected between the two main cooling sections (11); wherein two adjacent cooling units (10) share one main cooling section (11); the two main cooling sections (11) and the auxiliary cooling section (12) enclose to form a cooling space (100); at least one cooling loop (200) is arranged in the cooling part (1), a main cooling flow channel (210) is arranged in the main cooling section (11), an auxiliary cooling flow channel (220) is arranged in the auxiliary cooling section (12), and the main cooling flow channel (210) is communicated with the auxiliary cooling flow channel (220) to form the cooling loop (200); and

at least one electric core (2) accommodated in the cooling space (100), the electric core (2) having a first wall (2 a) and a second wall (2 b);

the main cooling section (11) is attached to a first wall (2 a) of the battery core (2), and the auxiliary cooling section (12) is attached to a second wall (2 b) of the battery core (2).

2. The battery module according to claim 1,

each main cooling section (11) has two end parts (k), each main cooling section (11) comprises two first main cooling sections (111) extending along the third direction and a second main cooling section (112) extending along the first direction, the first main cooling section (111) has a first end (111 a) and a second end (111 b), the second main cooling section (112) is connected between the first ends (111 a) of the two first main cooling sections (111), the second end (111 b) forms the end part (k), and each auxiliary cooling section (12) is connected between the end parts (k) of the two adjacent main cooling sections (11);

wherein the third direction is perpendicular to the first direction and the second direction, respectively;

every first main cooling section (111) is inside to be provided with first main cooling runner (210 a), the inside second main cooling runner (210 b) that is provided with of second main cooling section (112), first main cooling runner (210 a) with second main cooling runner (210 b) intercommunication forms main cooling runner (210), every two adjacent main cooling runners (210) of vice cooling runner (220) intercommunication.

3. The battery module according to claim 2,

each cooling unit (10) further comprises a first curved section (13) and a second curved section (14), the first end (111 a) of the first main cooling section (111) and the second main cooling section (112) are connected by the first curved section (13), the second end (111 b) of the first main cooling section (111) and the secondary cooling section (12) are connected by the second curved section (14);

the first bending section (13) is internally provided with a first bending cooling flow channel (230), the second bending section (14) is internally provided with a second bending cooling flow channel (240), the first main cooling flow channel (210 a) is communicated with the second main cooling flow channel (210 b) through the first bending cooling flow channel (230), and the first main cooling flow channel (210 a) is communicated with the auxiliary cooling flow channel (220) through the second bending cooling flow channel (240).

4. The battery module according to claim 1,

each cooling unit (10) further comprises a third curved section (15), the secondary cooling section (12) being connected with one (11) of the two primary cooling sections (11) by means of the third curved section (15);

and a third bending cooling flow channel (250) is arranged in the third bending section (15), and the auxiliary cooling flow channel (220) is communicated with the main cooling flow channel (210) through the third bending cooling flow channel (250).

5. The battery module according to claim 4,

one main cooling section (11) of the two main cooling sections (11) is of a linear structure, and the other main cooling section (11) is of an arc structure.

6. The battery module according to claim 2,

the number of the cooling pieces (1) is at least two, wherein the cooling piece (1) with larger size is sleeved on the cooling piece (1) with smaller size along the third direction.

7. The battery module according to claim 2,

the first direction is an x direction, the second direction is a y direction, and the third direction is a z direction; or

The first direction is an x direction, the second direction is a z direction, and the third direction is a y direction; or

The first direction is a y direction, the second direction is an x direction, and the third direction is a z direction.

8. The battery module according to claim 1,

the main cooling section (11) is of a bent structure, and two ends of the auxiliary cooling section (12) are connected with the two main cooling sections (11) respectively.

9. The battery module according to any one of claims 1 to 8,

the surface area of the second wall (2 b) of the cell (2) is smaller than the surface area of the first wall (2 a) of the cell (2).

10. The battery module according to claim 1,

the cooling circuit (200) has a liquid inlet (200 a) and a liquid outlet (200 b) that are in fluid communication, the liquid inlet (200 a) being located on an upstream side in a flow direction of the cooling liquid of the cooling circuit (200), and the liquid outlet (200 b) being located on a downstream side in the flow direction of the cooling liquid of the cooling circuit (200).

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